GB/T 8016-1995 General technical requirements for shipboard echo sounder equipment
Some standard content:
ICS 47.020.70
National Standard of the People's Republic of China
GB/T 8016 -.- 1995
General specification for echo-sounding equipment in ships
Promulgated on 1995-71-20
Implementation on 1996-08-01
Promulgated by the State Technical Supervision Commission
National Standard of the People's Republic of China
General specification for echo-soupding equipment in ships
This standard adopts GB/T 8016-1995-1995-3.
1 Contents and scope of application
GR/T B016 --- 1995
Generation GBX518--57
Production standard for measuring water depth using echo sounder equipment 3 and IS0435 This standard specifies the product classification, technical requirements, test methods and inspection rules for ship echo sounder equipment. This standard applies to marine echo sounding equipment for sea navigation, inland river navigation, channel measurement and other special purposes. Standard No. 2
G3047.1 Basic dimensions of poles, frames and echo sounders GB3477 General quality standard for weatherproof towed vehicles
GB3S47 Acoustic terminology
GR4793 Safety requirements for electronic measuring instruments
GB63B5 Transport package collection and delivery marks
Acoustic hydroacoustic transducer measurement
Electronic measuring instrument operability test
GB1=453
GB,12257 General requirements and test methods for marine navigation equipment CB673 Access hatches
CB1146.? Equipment environmental test method Eh CT1146.R Ship new equipment environmental test method Ee tilt and broadcast CB1146.10 Ship equipment environmental test method Ha: Low gain busy storage SJ32 [2 Electronic product packaging technology polyester parts 3 Terminology
3.1 Pfairemprabability
When there is only noise at the input end of the receiver, the probability of the receiver misjudging it as "signal" during the temporary output period. 3.2 Detection probability P. Detection probability P. The probability of the receiver correctly judging the output as "signal" when there is a signal at the receiver end. 3.3 In addition to the above technical spectrum, the acoustic terms used in this standard shall comply with the provisions of GB 3947. 4 Product classification
4.1 Echo sounding equipment is divided into navigation, river navigation, waterway measurement, water quality measurement and special purposes. 4.2 Echo sounder equipment can be divided into fixed type and portable type according to the installation method. National Technical Supervision Product Approved on November 20, 1995 1.996-08-01 Modification GB/T 8016 --1995 4.3 Echo sounder equipment can be divided into graphic recording type, digital indication and screen display according to the indication method 4.4 Depth range of products The following nine levels are preferred for the depth range: 10-2000 m: 10-5000 m; 2-2000 m; 2-430 m; 1-200 m; 0.5-133 m; 3-250 m; 1-200 m; 2-300 m; 3-400 m; 4-500 m; 5-600 m; 6-700 m; 7-800 m; 8-900 m; 9-100 m; 10-1200 m; 12-250 m; 13-250 m; 14-150 m; 15-200 m; 16-250 m; 17-250 m; 18-250 m; 19-300 m; 20-300 m; 21-250 m; 22-250 m; 23-250 m; 24-250 m; 25-300 m; 26-250 m; 27-250 m; 28-250 m; 29-300 m; 31-300 m; 32-300 m; 33-300 m; 34-300 m; 35-300 m; 36-300 m; 37-300 m; 38-300 m; 39-400 m; 41-4 m.
4.5 The product has an equivalent
product accuracy level (scan for the measured depth) is divided into five levels; dynamic
2 add;
±C.2%.
5 Technical requirements
5.1 Usage requirements
5.1.1 The equipment is designed for reliability. Strive to achieve volume, high precision, low power consumption, and long accuracy. 51.? The equipment is easy to operate and easy to find faults and repair. 5.1.3 The display of the equipment should be easy to observe, the display of the degree should be clear and easy to read at the viewing angle, and the size and position of all control switches should be appropriate to facilitate adjustment and recognition.
5.1.4 Equipment for navigation and inland navigation should have adequate onboard lighting, full control buttons and readouts. The brightness of the lighting can be adjusted until it goes out, except for instructions from the reporting department. 5.7.5 The equipment should directly store and supply depth data. 5.1.6 Connection requirements
Other sounding equipment with digital indication and other forms should have a universal interface for data exchange with other departments or auxiliary input and output libraries. Equipment with analog signal output must have a signal input port when necessary: 5.1. ?Product Document Requirements
5.1.7.1 The manufacturer shall provide an instruction manual for each equipment delivered from the factory, as well as necessary accessories and a spare parts list. When fault screening and component identification are carried out on board, detailed fault detection procedures, component routing and component lists, as well as maintenance instructions and diagrams shall be provided. When fault screening and maintenance cannot be achieved, detailed instructions shall be provided to enable cross-checking of defective models and to determine the cause of the defect. 5.1.7.2 The data to be described in detail in the instruction manual: frequency, working frequency, transducer speed, minimum time that can be recorded or trapped, minimum measurable depth of echo sounder, GE/T8016-1995, e: In order to accurately detect the source depth, there should be detailed operating procedures, maintenance procedures, and safety precautions for the compass. 5.2 Safety requirements 5.2.1 The equipment design should ensure the safety of operators and avoid equipment failure. And it should meet the relevant provisions of GH4793. 5.2.2 Where there are safety requirements, safety signs should be set, and the safety requirements of GH4793 should be followed. When the equipment is in working condition and there is a danger of electric shock, a safety certificate or warning mark should be installed on the recorder. 5.2.3 When the combined value of DC and no-load current (except radio frequency voltage) in the circuit exceeds 51V, protective measures should be taken to protect the human body and the product.
5.2.4 When there is a high current of more than 25 mA and a voltage of more than 1.5 kV inside the equipment, a protective device should be installed to automatically cut off the power supply when the protective cover or high-voltage protective cover is opened, so that the high-voltage capacitor is automatically connected to the discharge circuit with the impact, and the high-voltage capacitor is discharged to a safe level within: time.
5.2.5 It is strictly forbidden to set a compensation mechanism when the unprotected commercial voltage is near the equipment. 5.2.6 The discharge current limit in the discharge circuit should be two resistors with the same limit value and used quickly. 5.2.7 All external metal parts of the equipment including the metal parts of the control valve and the handle should be grounded. Any AC power source should not be grounded. A special grounding hook should be installed on the equipment and marked. 5.2.B The equipment should have an indication when the power is turned on. 5.2.9 When there are multiple power supplies in the equipment, one must be connected and the power should be equal, but the small power supply can be disconnected safely.
5.2.10 The leakage current of each independent extension on the equipment structure should not exceed: .5mA, 5.2.11 The mechanical noise of the equipment installed in the driving area and other sound-generating areas should not exceed 65dB (A). 5.2.72 There are no exposed mechanical parts of the equipment, and protective covers should be added to all parts that are close to personal safety. The plug-in box weighing more than 10kg should be equipped with a limit mechanism. 5.3 Structural requirements
6.3.1 Each extension of the equipment can pass the table in GB3477 The 1200mm×600m door specified in Phase 2 (minus the corner with a radius of 150mml) should be able to pass through the 600mm diameter hatch specified in B673. The specific dimensions shall be agreed upon by the supplier and the supplier. 5.3.2 The dimensions of the panel shall comply with the provisions of GB3047.1. 5.3.3 If there is a ventilation ratio and a height adjustment device, the protective effect shall be minimized. 5.3.4 If there is a height adjustment device, it shall be designed as a calibration adjustment device and cannot be used as an operating button. 5.4 Electrical requirements
5.4.1 Power supply
5.4.1.1 The equipment should be able to work normally under the following conditions: 7, AC, deviate from rated voltage ±10%, deviate from rated voltage 5: b, DC: when powered by ship power, the voltage changes from rated value +10%: -20% when the battery is fully charged, the voltage changes from rated value -30% to -10% 5.4.1.2 The equipment should have protection devices to prevent continuous current, overcurrent, power transformer and wrong polarity or phase sequence. 5.4.2 Insulation and withstand voltage
5.4.2.1 The insulation voltage of the equipment power supply circuit and the transducer shall be in accordance with the requirements of the table. Table 1
Tested part
The voltage between the power supply circuit and the device is not greater than V. The voltage between the power supply circuit and the machine is greater than V>100
Tested part
The voltage between the transducer core wire and the transducer core (when there is insulation requirement) GB/T 8016
Continued Table 1
5.4.2.2 Equipment power supply initial circuit insulation strength test according to the requirements of Table 2, Table 2
Specified working electronic
When: The power supply is used for the period of service, if not, Table 2 is required, 5.4.2.3 Transducer withstand voltage test according to the requirements of Table 3, Table?
>60-~220
120--24V
>240.-489
Test
20+:000
Water pressure test
The conducted interference, anti-interference and other requirements of the equipment shall be in accordance with the relevant provisions of Chapter 7 of CB/T12267. 5.4.4 The safe distance of the equipment from the monitoring compass The safe distance of the equipment from the pedal compass shall be in accordance with Article 15.6 of CB/T12367. 5.5 Main performance indicators
5.5.1 The minimum and maximum measurable depths of the product equipment shall be specified. When the sound is transmitted in the normal range, the equipment shall be able to measure any depth within the depth range. The equipment room for navigation should have a depth range of 2~100m at least. 5.5.2 Technical parameters
The technical conditions of the product should generally specify the following technical parameter values and their error ranges: 5.5.2.1 The power P, W, or the apparent power P, VA, consumed by the receiving equipment. 5.5.2.2 The frequency of the transmitting signal f, kHt.
5.5.2.3 Transmitter power P, mg,
The center frequency of the receiving band is f. k1lz.
Receiver bandwidth B, dB (reference value: Hz)
5. 5. 2. 8
5. 5 2. 9
5. 5. 2. 1D
Receiver sensitivity M, dB reference value 1V)
Detection interface, B, and the equipment detection rate P. The design value of the probability of substitution of the emission source level Id white (reference value 1 Pa·m). Emission directivity index. dB or emission beam width 28-1. The receiving directivity index DdB is the receiving wavelength bandwidth 28-Da, GB/T8016—1995
5.5.2.12 The equivalent electrical impedance of the transmitting transducer is 2.., 0. 5.5.2.13 The equivalent electrical interference of the receiving transducer is 2%, 0, 5.5.2.74 The recording sensitivity of the receiving transducer is M, +dB (basic value 1V/μPa), 5.5.2.15 The bandwidth of the receiving transducer is R. +dB<.*Pain value 1Hz). 5.5.2.16 Mean time between failures (MTBF), h; Mean time to failure (R), h 5.5.3 Range scale
5.5.3.1 For equipment used in navigation, the recorder should have at least basic range discrimination for deep water and water. The deep water range should have a depth range of not less than 400m. The water range should be one tenth of the deep water range. 5.5.3.2 When the equipment has range phase shifting, the two phase shifting quantities connected should generally overlap by more than one tenth. When using phase quantities that are not equal, there should be indication.
5.5.3.3 For the recorder used for navigation equipment, the scale division of the range shall not be less than 2.5m per meter of water depth, and the scale division of the range shall not be less than 0.25mm per meter of water depth.
5.5.3.4 Equipment used for inland navigation shall be able to meet the measurement requirements of the shallowest and deepest waterways of ships, and shall be equipped with two ranges. The deep water range shall not be less than 100m, and the shallow water range shall be one tenth of the deep water range. For only navigation channels and portable or sounding equipment, there may be only one range.
5.5.3.5 The scale of the recorder used for waterway surveying and special equipment shall be specified by the product technical specifications. 5.5.4 Display
5.5.4.1 Equipment used for navigation and waterway surveying shall be equipped with a permanent recorder with a strategic chart, and the depth can be read out immediately on the mark. When the equipment is divided into ranges and phase shifts, the range mark and phase shift mark should be recorded on the recording paper. The depth range should be limited to the time of the shift. The single unit should be able to maintain the required depth data for 15m2. The auxiliary display, including the display of the physical form, can be added or purchased from time to time, but they should not affect the performance of the main unit.
5.5.4.2 Regardless of the method used, when the recording paper is only one tenth of the length of the variable disk, there should be a clear reminder.
5.54.3 When the equipment is used to aid navigation, the sound and light alarm of shallow water should be effective. 5.5.4.4 The display of the equipment used for inland navigation can be in the form of digital display or graphic recording. 5.5.4.5 The reading of the depth is based on the bottom transducer surface. If there is no device to change the measured depth to the depth calculated from the water surface, an indication should be given when this working mode is used. 5.5.5 Pulse repetition rate
5.5.5.1 For the filtration equipment with 2400m depth range, the pulse repetition rate of deep water range shall not be less than 12 times/min, and the shallow water range shall be corresponding.
5.5.5.2 The pulse repetition rate of other depth range equipment shall be specified in the product technical conditions. 5.5.6 Accuracy
5.5.6.1 In order to correct the test data, the sound propagation speed of seawater medium shall be 1500m/s, and the sound propagation speed of water filtration medium shall be 1460m/s.
5.5.6.2 The product technical documentation stipulates that when the sounding accuracy is higher than the minimum agreed error of the equipment, the agreed error shall prevail. The minimum fixed error of marine equipment shall not exceed 1m, and the minimum fixed error of inland waterway equipment shall not exceed 0.5%. 5.5.6.3 Equipment with a sounding accuracy of more than 1%, ± 0.5% and ± 0.2% shall generally not be equipped with an acoustic verification device. 5.5.6.4 Digital sounding equipment shall adopt anti-interference measures to suppress erroneous readings caused by reflective objects (negative objects, debris).
5.5.6.5 The permissible error of depth indication of navigation equipment for 2~400m bathymetric sounding range shall be within the following range: shallow water range 1m or ±5% of the marked depth, deep water range 5m or 5% above the measured depth, whichever is greater. This error does not include the influence of the whole longitudinal and transverse data. 5.5.6.6 The permissible error of depth indication of inland river auxiliary equipment for 0.3~100m bathymetric sounding range shall be within the following range: Shallow water range 5
GB/T8016-1995
1℃.2m or +2% of the depth of the continent. Deep water range 10m deep 2000m deep, double the larger one. This does not include the vertical range of the ship, which will affect the vertical range. 5.5.7 The stability of the sounding when the ship is swaying or tilting. The equipment with beam design should generally meet the requirements of operation. If there are special requirements, the technical case shall be specified. 5.5.1 For navigation equipment, when adding or tilting ±15\ or vertically 5, the equipment should be stable to carry out sounding. 5,5.72 For inland navigation, channel sounding equipment, when the ship is tilted ±5 or moved ±2°, the equipment should be able to move and measure. 5.5.7.3 When the beam of the equipment is not enough, other measures can be used to meet the requirements. 5.6 Environmental Condition Requirements
5.6.1 General Provisions
The environmental tests of navigation equipment shall meet the requirements of 5.5.2~5.6.12. The environmental test conditions of the equipment for intranet navigation, channel measurement and other equipment shall be specified by the product technical conditions. The equipment can be equipped with various control devices to meet the test requirements: 5.6.2 Equipment Classification
According to Article 6.1.1 of GBT12257, the filter changer is classified as S category, and the other cabin air conditioners are classified as E category. 5.63 High Temperature Test Requirements
Class B equipment shall be subjected to 5-3, 4h power supply test. 5.6.4 Low Temperature Test Requirements
For the selected equipment, a 1i, 2, 3, 10h low resistance test shall be carried out. 5.6.5 Low-temperature storage test requirements
Class B and Class S equipment shall be tested at a temperature of -40±3℃ and a duration of 10h in accordance with the requirements of Chapter 1 of CB116.10.
5.6.6 Hot test requirements
Class B equipment shall be tested at a relative condensation of (13±2)%, humidity of 40=3Y, and a constant humidity test of 10h. 5.6.7 Hypothermia test requirements
Class B and Class S equipment shall be tested in accordance with the requirements of Section 1 of CB116.7. 5.6.5.6.9 Requirements for lifting test
Class B equipment shall be tested according to Table 2 of 4th 1st 1st 1146.8 with a tilt of ±22.5° and a horizontal tilt of ±22.9° for 5 minutes, and a composite lifting test with a duration of 3 minutes. 5.6.10 Water test
Class B equipment and S-type equipment shall be tested according to 14.4 of GB/T12297. 5.6.11 Long-term lifting test
Non-metallic materials that are not standard-compliant shall be tested for the first time in equipment. If they meet the requirements of 3.1a of GB/T1226?, this test can be exempted. 5.6.12 Test The equipment shall be subjected to a penetration test. If it complies with 3.1 of GB/T 226, this test may be exempted. 6 Test method 6.1 Test atmospheric conditions Normal atmospheric conditions: Temperature, 5~35°C; Relative humidity: 35%~75°C; Air pressure, 86~106 kP. GB/T 8016 If the tested parameters depend on temperature, humidity and pressure and this relationship is not known, the test may be carried out under the following arbitration atmospheric conditions: Temperature: 25±1°C; Relative humidity: 4%~525%; Air pressure, 86~106 kP.
6.2 Safety inspection
6.2.1 Electrical test
The electrical test shall be carried out in accordance with Article 9.5 of GB4793. It shall meet the requirements of Article 5.2.10. 6.2.2 Mechanical noise of equipment
When the equipment is in normal operation, the sound level meter shall be directly aimed at the peak sound position of the equipment, with a distance of 1m, and the sound level of the equipment shall be measured in A-weighted manner. It shall meet the requirements of Article 2.11. The equipment shall not be tested during the starting process. 6.3 Electrical test
6.3.1 Electrical and power
The equipment shall be tested under the three power supply conditions in Table 4, and work for at least 15 minutes under the conditions. For DC power supply equipment, only electrical test shall be carried out. When powered by batteries, the battery capacity shall be more than 10 times the power during the test. It shall meet the requirements of Article 5.4.1. Table 4
6.3.2 Green test
The insulation and dielectric strength test shall be carried out in accordance with 9.7.3 and S.7.4 of GB4793, and shall meet the requirements of 5.4.2. 6.3.3 The dry loss test shall be carried out in accordance with the relevant provisions of CB/r1225715, and shall meet the requirements of 5.4.3. 6.3.4 The test of the safety distance from the magnetic compass shall be carried out in accordance with 15.6 of G1286, and shall meet the requirements of 5.4. 6.4 Test methods for main energy extraction targets
6.4.1 Depth performance
6.4.1.1 Minimum measurable depth
Place the transducer in a small pool (preferably with no seawater, sound tightness or no internal installation plan) in a normal way, with its acoustic axis pointing directly to the interface that produces dust echoes. This interface can be the side or side of the test pool, which has a medium reflection coefficient.
The distance between the transducer and the reflection interface should be adjustable for measurement. The time difference of the test cannot be affected by other objects or discontinuity of adjustment. The test result can be clearly seen. The echo sounder works in the shallow water range and uses the longest distance between the echo sounder and the reflective surface. From small to large, the reflected waves can be clearly distinguished and displayed. Then the real height is drawn. 1 is the minimum measurable depth, which is not greater than the requirements of the product requirements. The above test is only carried out during factory inspection. During the production process, the test can use a fixed distance to observe whether the echo sounder is clearly displayed. For equipment with a depth range of 10 to 5000m and 1 to 1200m, if it is inconvenient to test in the factory, it can also be evaluated after installation.
6.4.1.2 Maximum measurable depth
The maximum measurable depth is generally determined by calculating the best value when setting the projectile. The best value can be calculated by parameter measurement according to Appendix A (Supplement C/8016-1995) 1. For the 2～400m sea level, the best value should meet the requirements of Table 5.65. H5
20x,15
When the parameter value of the equipment and its adjustment are to ensure the optimal value, it can be calculated repeatedly in production and inspection. 6.4.2 Technical parameters
6.4.2.1 Measurement of average power consumption
Use the method of parallel voltmeter and series current meter in the power supply line to measure the voltage and current value, and then calculate the power. The width meets the requirements of Article 5.5.2.1
6.4.2.2 Measurement of the center frequency of the transmitting signal Use a mathematical meter to measure the carrier frequency of the transmitting signal source. When the signal source can provide a continuous carrier, the Li Shaoyu graphic method is used on the oscilloscope. When the accuracy requirement is high, the multi-phase synchronous digital measurement method can be used to output the pulse width and the number of waves. The center frequency of the signal is calculated according to formula (1): fu-Nt
武4:— Center frequency, kH2
Pulse width within the effective cutoff!
Pulse width standard + ms
The measured and calculated results shall meet the requirements of 5.5.2.2, 6.4.2.3 Measurement of pulse width
Time interval measurement or frequency meter with time measurement function shall be used to measure the output waveform or oscilloscope shall be used to measure the output waveform using the time scale method, meeting the requirements of 3.5.2.3
If the pulse envelope is not rectangular: The product technical conditions shall be specified to determine the level of pulse width, 5.4.2.4 Measurement of emission power
During the measurement, an equivalent load shall be connected to the transmitter before the output. When the transmitter and the converter are connected in a joint modulation (such as 1), the effective value of the voltage output by the transmitter shall be measured, and the output power shall be calculated according to formula (2) The measurement result shall meet the requirements of 5.5.2.4, point P, =/R.
In the formula,
P, Yushan Gongge.W,
core-transmitter output voltage effective value, V
R, transducer parallel equivalent resistance,
X, transducer parallel equivalent reactance
X. -parallel modulation reactance,.
GB/T0161995
When the transmitter and transducer are connected in parallel (as shown in Figure 2), measure the effective value of the transmitting output current, and calculate the output power according to formula (3). The measurement result should meet the requirements of 5.5.2.4. P.-FR
or stimulator
In the formula and figure:
-output power, :
Emitted current.A:
R,—Equivalent resistance of transducer circuit, n; X, Equivalent reactance of transducer circuit, n.
X. -Series modulation interference, 0
Avoid the standard sampling voltage limit of the whole circuit, which should be less than 0.015R,, 0,s
The voltage or current output by the ball impulse transmitter is measured by a step-by-step display. When the voltage is too high, it can be connected through a cold reduction. The measurement circuit is always on time. If the sampling resistance will cause a large measurement error, the current measured by the inverse coefficient can be eliminated. When there is a drop, fluctuation and asymmetry of the lower half wave, the average value of the voltage (or current) at the midpoint of the ball impulse is used for calculation. 6.4.2.5 Measurement of receiver frequency characteristics
The equipment only works in the receiving state, and the automatic gain control and time gain control circuits are disabled. A sensor signal of appropriate frequency and level is added through the receiving transducer equivalent network. Keeping the signal level unchanged, the output voltage of the receiver is measured by changing the frequency. With the maximum input voltage as a reference, the lower and upper limits of the level 3dB below are determined, thereby determining the center frequency and band width of the receiver. The requirements of 5.5.2.5 and 5.5.2.6 should be met. 6.4.2.6 Measurement of receiver sensitivity
The equipment works in the receiving state, and the analog feedback signal of specified frequency and pulse width is added to the receiver through the equivalent network. The simulated echo signal is generated by the sensor, and the delay is equivalent to the maximum depth of the filter delay. The signal level is adjusted to obtain the minimum display signal at the corresponding level. This signal level is the receiver sensitivity. This signal level is converted into sound pressure level. Its value should be 10dB lower than the echo level (r-2L-A-×). It meets the requirements of Article 5.5.2.7.
6.4.2.7 Measurement of test quality
/T8016—1995
For simple signal processing equipment + detection,According to formula (A2) as the derived parameter, for equipment with complex signal processing, the following method can be used for measurement and detection. During measurement, the transmitter is not working, but the transmission trigger signal is introduced. A steady Gaussian sound is added to the receiver input. The sensitivity of the receiver is increased, and the automatic gain control does not work. The noise voltage is adjusted to observe the noise rate of not less than 10 times (see the product technical requirements). The mean square value of the noise-inhibiting voltage at the input end of the receiver is measured. After it remains unchanged, the analog readback signal is added (50100 can be taken). There is a positive display on the sounding equipment. The detection probability is 1/3. The input signal size is adjusted to meet the specified detection probability. The noise is removed and the dynamic root value U of the signal is measured at the same position of the micro-gaussian sound. At this time, the detection sound is calculated by formula (4). It should meet the specified value of 5.5.2.8. D, = 20lgt./.)
Where:
According to the voltage mean square value of the measured signal
intercepted, V;
. ---Noise voltage mean value at the input end of the heat sink, V. 6.4.2.8 Measurement of sound source level during emission
Make the echo sounder work and measure according to Chapter 13 of GH7965. Then the sound level 1 is calculated according to formula (5) and should meet the requirements of Article 5.5.2.9:
L,-20gP20g5.-120
Where:
Sound pressure +Pa:
5: ---The distance from the hydrophone to the direction of the acoustic axis of the transducer emission, m, 6.4.2.9 The directivity response of the transducer can be measured according to Section 10 of 7965.
The directivity diagram can be used to calculate the 3B wave width and side wave level, as well as the longitudinal loss of the transmitting beam and the longitudinal and transverse losses of the receiving beam: An G79G: Chapter 11 calculates the directivity index, and the side wave index is less than 8 lower than the main induction. The inter-directivity index can be calculated according to formula (6) or formula [7), and the order meets the requirements of 5.5.2.10 and 5.3,2.11. For circular transducers, E: 46.5:20lg26-sm, where D: directivity loss, dB,
—3 beam width, ()
For round or shaped transducers, E: 45.5 -- 10x28,-. 10lg28,-..n, where
20: long axis square beam width,
short axis square beam width,
5.4.2.10 Measurement of equivalent impedance of transducer (6)
The measurement shall be carried out in accordance with Chapter 9 of GB 7965. If the transducer is a transmitter and receiver, the transmitting and receiving equivalent impedances shall be measured separately. See the provisions of 5.5.2.12 and 5.5.2.13. 6.4.2.11 The sensitivity and rate characteristics of the receiving grease changer shall be measured in accordance with Chapter 5 of GB79h5. The sensitivity of the carbon on the working section shall meet the requirements of Tables 5.5.2.14 and 5.5.2.15. 6.4.2.12 The test of the mean time between failures (MTBF) shall be carried out in accordance with 4.2.1 of GB11463 and shall meet the requirements of 5.5.2.15. 6.4.3 Range scale requirements Acceptance inspection shall be carried out in accordance with 5.5.3. The effective width of the recording paper used shall be measured to determine whether the scale division rate meets the requirements.
6.4. Display trend inspection
GD/T8016-1995
Indicator requirements shall be inspected in accordance with 5.4. The pattern retention time shall be checked by the method of digital time scale or by the stopwatch to determine the moving speed of the T mark line:
6.4.5 Measurement of pulse repetition rate
The repetition rate can be measured by using a digital rate meter. First, the average repetition rate shall be measured. The deep water range shall be 20 pulses, and the shallow water range shall be not less than 100 5.4.6 Depth measurement accuracy First check whether the leading edge of the zero line of the transmitter coincides with the phase of the depth scale - use the degree pulse in the equipment to trigger the special pulse delay device to generate the received echo signal, the delay is accurately controlled to better than 10%, and then input into the receiver. The time increment of the pulse signal delay is adjusted to be equivalent to one tenth of the range. Each range is measured separately. For the phase shift range, the echo interval needs to be adjusted according to the full range, and pay attention to whether the phase shift is appropriate. The depth reading before each pulse is read from the scale should meet the requirements of 5.5.
6.5 External test
6.5. High temperature test
The test is carried out in accordance with GB/T12267, 14.1, Section 3 of the 3rd class heat test. During the test, the converter is placed in water as a load only: 6.5.2 Mixed heat test
The test is carried out in accordance with GB/T1226, 11.2, Section B class equipment: During the test, the converter is placed in water as a load only. Before the equipment is powered on, the insulator resistance measurement shall be carried out in accordance with the requirements of 5.4.2.1 and 3.2. 6-5.3 Low temperature test
The test is carried out in accordance with GB/12251, 14.3, Section B class equipment. During the test, the transducer is placed in water as a load. 6.5.4 Low-voltage test
Class B and S equipment are not working. According to CB1146.10, no intermediate inspection is performed. 6.5.5 Follow-up test
Class B equipment is powered on and tested in the actual installation state according to 14.5.7 to observe whether it works normally. No intermediate inspection is performed. During the test, the transducer is placed in water as a load only: Class S equipment is not working. According to CB1.45.7 to observe whether it works normally. No intermediate inspection is performed. 6.5.6 Dumping and shaking test
Class S equipment is powered on and tested in the actual installation state according to CB114.5.7 to observe whether it works normally. No intermediate inspection is performed. During these tests, the transducer is placed in water as a load only.
E.5.7 Vibration test
For Class B equipment, conduct the test in accordance with 1-4 of GB/T12267 when the equipment is powered on, and observe whether the equipment works normally. For Class S equipment, conduct the test in accordance with 14.1 of GB/T12267 when the equipment is not powered on. 6.5.8 Water connection test (only for Class S equipment)
Class S equipment shall be carried out in accordance with 14.6 of GB/T12267 when it is not in operation. 6.5.9 Technical test for equipment
According to 14.6 of GB/T12267. When the manufacturer holds a qualified report on the long-term test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and production units:
6.510 Salt spray test
Equipment component test
According to 14.8 of GB/T12267. When the manufacturer holds a qualified report on the salt spray test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and use units.
—3 beam width, ()
For a shaped or circular transducer
E, 45. 5 -- 10x28,-. 10lg28,-..n In the formula, the directivity loss factor is
20,: long axis square beam width,
short axis square beam width,
5.4.2.10 Measurement of transducer equivalent impedance (6)
The measurement shall be carried out in accordance with Chapter 9 of GB 7965. If the transducer is a transmitter and receiver, the transmitting and receiving equivalent impedances shall be measured separately. See the provisions of 5.5.2.12 and 5.5.2.13. 6.4.2.11 The sensitivity and rate characteristics of the receiving grease changer shall be measured in accordance with Chapter 5 of GB79h5. The sensitivity of the carbon on the working section shall meet the requirements of Tables 5.5.2.14 and 5.5.2.15. 6.4.2.12 The test of the mean time between failures (MTBF) shall be carried out in accordance with 4.2.1 of GB11463 and shall meet the requirements of 5.5.2.15. 6.4.3 Range scale requirements Acceptance inspection shall be carried out in accordance with 5.5.3. The effective width of the recording paper used shall be measured to determine whether the scale division rate meets the requirements.
6.4. Display trend inspection
GD/T8016-1995
Indicator requirements shall be inspected in accordance with 5.4. The pattern retention time shall be checked by the method of digital time scale or by the stopwatch to determine the moving speed of the T mark line:
6.4.5 Measurement of pulse repetition rate
The repetition rate can be measured by using a digital rate meter. First, the average repetition rate shall be measured. The deep water range shall be 20 pulses, and the shallow water range shall be not less than 100 5.4.6 Depth measurement accuracy First check whether the leading edge of the zero line of the transmitter coincides with the phase of the depth scale - use the degree pulse in the equipment to trigger the special pulse delay device to generate the received echo signal, the delay is accurately controlled to better than 10%, and then input into the receiver. The time increment of the pulse signal delay is adjusted to be equivalent to one tenth of the range. Each range is measured separately. For the phase shift range, the echo interval needs to be adjusted according to the full range, and pay attention to whether the phase shift is appropriate. The depth reading before each pulse is read from the scale should meet the requirements of 5.5.
6.5 External test
6.5. High temperature test
The test is carried out in accordance with GB/T12267, 14.1, Section 3 of the 3rd class heat test. During the test, the converter is placed in water as a load only: 6.5.2 Mixed heat test
The test is carried out in accordance with GB/T1226, 11.2, Section B class equipment: During the test, the converter is placed in water as a load only. Before the equipment is powered on, the insulator resistance measurement shall be carried out in accordance with the requirements of 5.4.2.1 and 3.2. 6-5.3 Low temperature test
The test is carried out in accordance with GB/12251, 14.3, Section B class equipment. During the test, the transducer is placed in water as a load. 6.5.4 Low-voltage test
Class B and S equipment are not working. According to CB1146.10, no intermediate inspection is performed. 6.5.5 Follow-up test
Class B equipment is powered on and tested in the actual installation state according to 14.5.7 to observe whether it works normally. No intermediate inspection is performed. During the test, the transducer is placed in water as a load only: Class S equipment is not working. According to CB1.45.7 to observe whether it works normally. No intermediate inspection is performed. 6.5.6 Dumping and shaking test
Class S equipment is powered on and tested in the actual installation state according to CB114.5.7 to observe whether it works normally. No intermediate inspection is performed. During these tests, the transducer is placed in water as a load only.
E.5.7 Vibration test
For Class B equipment, conduct the test in accordance with 1-4 of GB/T12267 when the equipment is powered on, and observe whether the equipment works normally. For Class S equipment, conduct the test in accordance with 14.1 of GB/T12267 when the equipment is not powered on. 6.5.8 Water connection test (only for Class S equipment)
Class S equipment shall be carried out in accordance with 14.6 of GB/T12267 when it is not in operation. 6.5.9 Technical test for equipment
According to 14.6 of GB/T12267. When the manufacturer holds a qualified report on the long-term test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and production units:
6.510 Salt spray test
Equipment component test
According to 14.8 of GB/T12267. When the manufacturer holds a qualified report on the salt spray test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and use units.
—3 beam width, ()
For a shaped or circular transducer
E, 45. 5 -- 10x28,-. 10lg28,-..n In the formula, the directivity loss factor is
20,: long axis square beam width,
short axis square beam width,
5.4.2.10 Measurement of transducer equivalent impedance (6)
The measurement shall be carried out in accordance with Chapter 9 of GB 7965. If the transducer is a transmitter and receiver, the transmitting and receiving equivalent impedances shall be measured separately. See the provisions of 5.5.2.12 and 5.5.2.13. 6.4.2.11 The sensitivity and rate characteristics of the receiving grease changer shall be measured in accordance with Chapter 5 of GB79h5. The sensitivity of the carbon on the working section shall meet the requirements of Tables 5.5.2.14 and 5.5.2.15. 6.4.2.12 The test of the mean time between failures (MTBF) shall be carried out in accordance with 4.2.1 of GB11463 and shall meet the requirements of 5.5.2.15. 6.4.3 Range scale requirements Acceptance inspection shall be carried out in accordance with 5.5.3. The effective width of the recording paper used shall be measured to determine whether the scale division rate meets the requirements.
6.4. Display trend inspection
GD/T8016-1995
Indicator requirements shall be inspected in accordance with 5.4. The pattern retention time shall be checked by the method of digital time scale or by the stopwatch to determine the moving speed of the T mark line:
6.4.5 Measurement of pulse repetition rate
The repetition rate can be measured by using a digital rate meter. First, the average repetition rate shall be measured. The deep water range shall be 20 pulses, and the shallow water range shall be not less than 100 5.4.6 Depth measurement accuracy First check whether the leading edge of the zero line of the transmitter coincides with the phase of the depth scale - use the degree pulse in the equipment to trigger the special pulse delay device to generate the received echo signal, the delay is accurately controlled to better than 10%, and then input into the receiver. The time increment of the pulse signal delay is adjusted to be equivalent to one tenth of the range. Each range is measured separately. For the phase shift range, the echo interval needs to be adjusted according to the full range, and pay attention to whether the phase shift is appropriate. The depth reading before each pulse is read from the scale should meet the requirements of 5.5.
6.5 External test
6.5. High temperature test
The test is carried out in accordance with GB/T12267, 14.1, Section 3 of the 3rd class heat test. During the test, the converter is placed in water as a load only: 6.5.2 Mixed heat testbzxz.net
The test is carried out in accordance with GB/T1226, 11.2, Section B class equipment: During the test, the converter is placed in water as a load only. Before the equipment is powered on, the insulator resistance measurement shall be carried out in accordance with the requirements of 5.4.2.1 and 3.2. 6-5.3 Low temperature test
The test is carried out in accordance with GB/12251, 14.3, Section B class equipment. During the test, the transducer is placed in water as a load. 6.5.4 Low-voltage test
Class B and S equipment are not working. According to CB1146.10, no intermediate inspection is performed. 6.5.5 Follow-up test
Class B equipment is powered on and tested in the actual installation state according to 14.5.7 to observe whether it works normally. No intermediate inspection is performed. During the test, the transducer is placed in water as a load only: Class S equipment is not working. According to CB1.45.7 to observe whether it works normally. No intermediate inspection is performed. 6.5.6 Dumping and shaking test
Class S equipment is powered on and tested in the actual installation state according to CB114.5.7 to observe whether it works normally. No intermediate inspection is performed. During these tests, the transducer is placed in water as a load only.
E.5.7 Vibration test
For Class B equipment, conduct the test in accordance with 1-4 of GB/T12267 when the equipment is powered on, and observe whether the equipment works normally. For Class S equipment, conduct the test in accordance with 14.1 of GB/T12267 when the equipment is not powered on. 6.5.8 Water connection test (only for Class S equipment)
Class S equipment shall be carried out in accordance with 14.6 of GB/T12267 when it is not in operation. 6.5.9 Technical test for equipment
According to 14.6 of GB/T12267. When the manufacturer holds a qualified report on the long-term test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and production units:
6.510 Salt spray test
Equipment component test
According to 14.8 of GB/T12267. When the manufacturer holds a qualified report on the salt spray test of the components, materials and waste materials used in the equipment, it can be exempted from this test after consultation with the inspection and use units.8 Water connection test (only for Class S equipment)
Class S equipment shall be carried out in accordance with 14.6 of GB/T1226? when it is not working. 6.5.9 Technical test of each test particle
Technical test of each test particle
Equipment shall be carried out in accordance with 14.6 of GB/T12267? When the manufacturer holds the qualified report of the long-term test of the components, materials and waste materials of the equipment, it can be exempted from this test after consultation with the inspection and use units:
6.5.10 Salt spray test
Equipment component test shall be carried out in accordance with 14.8 of GB/T12267? When the manufacturer holds the qualified report of the salt spray test of the components, materials and waste materials of the equipment, it can be exempted from this test after consultation with the inspection and use units.8 Water connection test (only for Class S equipment)
Class S equipment shall be carried out in accordance with 14.6 of GB/T1226? when it is not working. 6.5.9 Technical test of each test particle
Technical test of each test particle
Equipment shall be carried out in accordance with 14.6 of GB/T12267? When the manufacturer holds the qualified report of the long-term test of the components, materials and waste materials of the equipment, it can be exempted from this test after consultation with the inspection and use units:
6.5.10 Salt spray test
Equipment component test shall be carried out in accordance with 14.8 of GB/T12267? When the manufacturer holds the qualified report of the salt spray test of the components, materials and waste materials of the equipment, it can be exempted from this test after consultation with the inspection and use units.
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