GB/T 15527-1995 General technical requirements for marine global positioning system (GPS) receivers
Some standard content:
UDC 621. 396. 62 :629. 12 : 629. 1. 05M53
National Standard of the People's Republic of China
GB/T 15527_1995
General specification for marine GPS receiver
General specification for marine GPS receiverPublished on April 6, 1995
Implemented on November 1, 1995
Published by the State Administration of Technical Supervision
W.National Standard of the People's Republic of China
General specification for marine GPS receiver receiver1 Subject content and scope of application
GB/T15527—1995
This standard specifies the technical requirements, test methods and inspection rules as well as marking, packaging, transportation and storage of marine global positioning system (GPS> receivers.
This standard applies to marine navigation-type global positioning system (GPS) receivers (hereinafter referred to as receivers) and is the basis for formulating product standards. 2 Reference standards
Packaging storage and transportation graphic marking
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) G2828
GB 2829
Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of production process stability) GB 4768
Technical requirements for mildew-proof packaging
GB 4879
GB 5048
Rust-proof packaging
Moisture-proof packaging
GB 5080.1
General requirements for equipment reliability test
Verification test plan for failure rate and mean time between failures under constant failure rate assumption GB 6080. 7
Equipment reliability test
GB6113 Electromagnetic interference measuring instrument
General requirements and test methods for marine navigation equipment GB12267
Antenna test method Field measurement of amplitude and direction circle SJ 2534.7
3 Terminology
3.1 Geometrical dilution of accuracy
geometrical dilution of precision (GDOP) is the amplification factor of the positioning error caused by the geometric relationship between the user and the selected satellite. 3.2 Time to first fix (TTFF) is the time for the receiver to obtain the first correct positioning after power is turned on. 3.3 Selective availability (SA) reduces the accuracy and jitter of GPS satellite broadcast ephemeris and satellite clock bias in order to reduce the positioning accuracy of GPS using C/A code 4 Technical requirements
4.1 General requirements
4. 1. 1 The receiver should be reliable, low power consumption, and easy to operate and maintain. 4.1.2 The receiver should have a white detection function. 4.1.3 After the receiver is disconnected from the external power supply, it should have a data retention function. Approved by the State Administration of Technical Supervision on April 6, 1995, and implemented on November 1, 1995
W.bzsoso:com4.2 Structural requirements
CB/T15527-1995
4.2.1 The receiver should have adequate dimensions and strength. 4.2.2 The lighting on the panel should not be dazzling and can be adjusted until it goes out. 4.2.3 The buttons and switches on the panel should have permanent use marks. 4.2.4 The surface of the receiver should not have any dents, scratches, cracks, deformation, etc. The surface coating should not bubble, crack or fall off, and the metal parts should not be damaged. 4.3 Performance requirements
4.3.1 Receiving performance
4.3.1.1 Antenna
Generally speaking, within 1575.42±1MHz, the axial ratio on the boresight should be less than 3dB;
At an elevation angle of 5°, the azimuth gain should be less than 3dBb.
At a suppression angle of 5°, the gain should be greater than -4.5dB:d. At an angle of attack of 10°, the gain should be greater than -2.5dB. 4.3. 1.2 Antenna, preamplifier, and receiver selectivity signal frequency is 1575.42MHz, 3dB bandwidth should not exceed ±20MHz +40dB bandwidth should not exceed ±10MHz 4.3.1.3 Antenna, preamplifier, and receiver impedance performance is within the range of 1375.12±1.5MHz, and the VSWR for 50n transmission should not exceed 2.4.3.1.4 Cable loss
Antenna, preamplifier, filter and receiver compartment are all connected cable loss should not be greater than 10dB.4.3.1.5 Input protection capability
When receiving 30dBml unmodulated continuous wave, the preamplifier should not be damaged. 4.3.1.6 Receive signal
The receiver can receive C/A spread spectrum signal with a frequency of 1575.42MHz transmitted by GPS satellite. 4.3.1.7 Auxiliary signal sensitivity
When the input signal carrier-to-noise ratio is 37 dBHz, the receiver acquisition sensitivity should be at least -136 dBm.4.3.1.8 Tracking sensitivity
When the input signal carrier-to-noise ratio is 37 dBHz, the receiver tracking sensitivity should be at least -140 dBm4.3.1.9 First positioning time
The first positioning time should be less than 2 min.
4+31.10 Elevation angle range of receiver positioning
When the angle of the receiver passing through is greater than 5 and there are more than three visible satellites, positioning should be possible and data should be automatically updated. 4.3.1.11 Positioning accuracy (CEP)
When the input signal carrier-to-noise ratio is better than 37 dBHz and GDOP≤4, the positioning accuracy should be better than 50m (better than 15m when there is no SA). 4.3.1.12 Speed accuracy
When the input signal carrier-to-noise ratio is better than 37dBHz and GDOF≤4, the accuracy of the accuracy should be better than 0.1m/s4.3.2 Guidance function
4.32.1 Ship position
The receiver should be able to automatically and continuously calculate the ship position. The calculation rate should be at least 1 time/*. When three or more properly positioned satellites are stored, the equipment should give two-dimensional and three-dimensional position complexes respectively. 4.32.2 Ground speed and trajectory
The receiver should be able to automatically calculate the ground speed and track direction. The calculation rate should be at least 1 time/min. 4.3.2.3 Waypoint function
The receiver should be able to set and store waypoints, and calculate the distance, direction, waiting time and estimated time of arrival to the waypoints. 2
W.4.3-3 Display function
4- 3. 3. 1 Positioning display
GB/T 15527-1995
Use longitude and latitude to display the ship's position. The longitude and latitude data are in degrees, minutes, seconds or tenths of a minute, and the south or north latitude, east longitude or west longitude should be indicated.
4.3 3 2 Its information display
It should be able to display the time (universal time), track direction, ground speed; it should be able to display the number and terminal number of the tracking satellite; it should be able to display the accuracy or quality factor
d. When using waypoint navigation, it should display the distance, altitude, direction and deviation data to a certain waypoint; it should be able to display the detection status.
4.3.4 Receiver interface
4.3.4.1 Initialization input (for receivers that require initialization) The receiver should be able to initialize
Set latitude:
Set longitude:
Input time:
Date,
4.3.4.2 Digital data interface
Format: NMEA0183 (see Figure 1). Receivers with differential function should have the ability to receive differential GPS correction data; a.
For example. Output content: latitude, altitude, range, speed, heading, etc. 4.3.5 Power supply requirements
4. 3. 5. 1 The receiver should be able to work normally under the following power supply changes: AC: deviation from rated voltage ±10%1
deviation from rated frequency ±6%.
DC: deviation from rated voltage
power grid %,
alarm battery 38%.
4.3.5.2 The receiver should have protection devices for overcurrent, overvoltage, power transient and accidental polarity reverse connection. 3
W.4.4 Environmental requirements
4.4.1 Temperature
4.4.1.1 High temperature
Present 0
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GB/T 15527-1995
Data bit
D7 stop
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5 to 9 nodes
Inside the cabin, the working temperature and storage temperature are 55℃. Data
Maximum 8 nodes
Outside the cabin: the working temperature is 55℃, and the storage temperature is 7℃℃. 4.4. 1.2 Low temperature
Inside the cabin: the working temperature and storage temperature are -15℃; outside the cabin: the working temperature is -15℃, and the storage temperature is -25℃. 4.4.2 Vibration
Inspection and
The receiver shall be able to work normally when subjected to sinusoidal vertical vibration at the frequency specified in Table 1 and keep the structure intact. Table 1
12. 5 ~ 25
25 ~ 50
4.4.3 Water spray
±1.6 (tolerance ±10%)
±0.38 (tolerance ±10%)
±0.1 (tolerance 10%)
The outer shell of the receiver cabin shall be able to prevent water from entering when subjected to sea wave splashing. 4.4.4 Damp heat
The receiver shall be able to work normally in an environment with a temperature of 40°C and a relative humidity of 93%. 4.4.5 Salt spray
The receiver shall be able to resist salt corrosion. 4.4.6 Mildew
The receiver shall be resistant to mildew corrosion. 4.5 Reliability requirements
The mean time between failures (MTBF) of the receiver shall be greater than 1500h. 4.6 Maintainability requirements
W.GB/T 15527—1995
The mean time to repair (MTIR) of the receiver shall not exceed 0.5h. 4.7 Interference
4.7.1 The limit of conducted interference shall comply with Article 15+2.1 of GB 12267. 4.7.2 The limit of radiated interference shall comply with Article 15.3.1 of GB 12267. 4.7.3 Anti-electromagnetic interference shall comply with the relevant requirements in Appendix A (reference). 4.8 Safety requirements
Safety requirements shall comply with the provisions of Chapter 9 of GB12267. 5 Test methods
5.1 General requirements
5.1.1 Unless otherwise specified, all tests shall be conducted under normal atmospheric conditions. 5.1.2 The power supply voltage applied to the receiver during the test is the nominal voltage. 5.1.3 The technical requirements in Chapter 4, which do not specify specific test methods in this chapter, shall be carried out through daily testing and in accordance with the methods specified in the equipment drawings or product standards.
51.4 All test equipment shall have sufficient resolution, accuracy and stability. Its performance shall meet the requirements of the technical performance indicators being tested. Except for the provisions, its accuracy shall be better than the accuracy of the measured indicators by one number or one third. 5.1.5 All test equipment shall be qualified by metrological verification and within the validity period. 5.2 Performance test
5.2.1 Antenna test
Install the external part of the receiver on the test stand, connect the circuit according to Figure 2, and test according to Chapter 2 of SJ2534.7. 5.2.2 Antenna, preamplifier, filter selectivity test Connect the circuit according to Figure 2, keep the signal source output amplitude unchanged within the range of 1575.42 ± 100MHz, test point by point at 1MHz intervals, read the field strength value dB at each frequency (T) point, and draw the V curve. 5.2.3 Antenna, preamplifier, filter impedance performance test Connect the circuit according to Figure 3, keep the signal source output unchanged, test point by point at 0.1MIzA within the range of 1575.42 ± 1.5MHz, and at each frequency point, record the maximum value (.) and minimum value (.) of the current detector according to the distance of one wavelength of the moving measurement line probe to calculate the VSWR.
Optical channel/preamplifier/filter
Subsidiary line
I gate load
Standard practice
W.5.2.4 Electric loss test
GCB/T 15527-1995
Connect the circuit as shown in Figure 4, adjust the signal source frequency to 1 575.2 MHz, keep the amplitude unchanged, and record the field strength value V,/dBm: Connect the cable to be tested into the circuit. Record the field strength meter value V:/JBml, and calculate the cable loss according to formula (1): AV,-V.
Wu Zhong: A-
Cable loss
Field strength meter reading, dBm,
5.2.5 Protection strength test
Use a sine signal generator to generate a 30 dBm The unmodulated continuous signal is matched with 50 n impedance and directly connected to the preamplifier input. The receiver should not be damaged.
5.2.6 Capture sensitivity
Adjust the frequency of the GPS analog signal generator to 1575-42MHz. The output amplitude is set at 136dBm, and connected to the preamplifier input of the receiver through a high-frequency cable (the input loss is less than 0.5 dH). The receiver should be able to capture the signal. The receiver can also capture the satellite signal with a pitch of 5*~7*. 5.2.7 Tracking sensitivity
After the receiver acquires the signal, reduce the preamplifier input analog signal to -140 dBm, and the receiver should not lose lock and continue tracking. 5.2.8 First positioning time
Turn on the power of the receiver and calculate the first correct positioning time. 5.2+9 Positioning accuracy
Fix the receiver antenna at a known height according to the use status, select at least three visible points and GDOP≤1, take positioning data for 10 minutes, remove the wild points according to the Grubbs criterion, take 100 two-dimensional data, and calculate the CEP value. 5.2.10 Speed accuracy
Put the receiver and the differential GPS receiver on the body (car, ship, etc.), select a period of time with GDOP≤4, and make it move at a speed. At the same time, print the speed and time of the two receivers and compare them. The speed test can also adopt the static test method to avoid error, that is, the receiver is stationary and prints the speed and heading under the condition of GDOP≤4, takes 1 set of data, and calculates the speed error (average). 5.2.11 Waypoint function test
According to the operating instructions, input the waypoint number and coordinates, install the receiver on the car, select several known points as waypoints and enter the receiver, start the car and drive through each waypoint in sequence, and observe the navigation data of the waypoints. 5.2.12 Display function test
The display function test method is specified by the product standard. 5.3 Power supply change test
5.3.1 Over-rated value test
According to the requirements of 4.3.5.1, when the receiver power is off for 5 minutes, the receiver should be able to receive satellite positioning normally. 5.4 DC power supply polarity reversal test
Input a rated power supply voltage with opposite polarity to the receiver for 5 minutes, then connect the normal power supply. The equipment should not be damaged. 5.5 Environmental test
5.5.1 Commercial temperature test
5.5.1.1 The receiver cabin part is carried out in accordance with the provisions of 14.1.1 of GB12267, and the items of initial test, intermediate test and final test are in accordance with the provisions of the product standard.
GB/t15527-1995
5.5.1.2 The receiver cabin part is carried out in accordance with the provisions of 14.1.2 of GB 12267, and the items of initial test, intermediate test and final test are in accordance with the provisions of the product standard.
5.5.2 Low temperature test
5.5.2.1 The receiver cabin part shall be carried out in accordance with 14.3.1 of GB 12267. The items of initial test, intermediate test and final test shall be specified in the product standard.
5.5.2.2 The receiver cabin part shall be carried out in accordance with 14.3.2 of GB 12267. The items of initial test, intermediate test and final test shall be specified in the product standard.
5.5.3 Vibration test
The vibration test shall be carried out in accordance with 14.4 of GB 12267. The items of initial test and final test shall be specified in the product standard. 5.5.4 Water spray test (external equipment)
The water test shall be carried out in accordance with Article 14.5 of GB 12267. The items for initial inspection and defect inspection shall be specified in the product standard. 5.5.5 Heat test
The heat insulation test shall be carried out in accordance with Article 14.2 of GB 12267. Initial quick test,The items of intermediate test and post-test shall be specified in the product standard.
5.5.6 Salt spray test
The salt spray test shall be carried out in accordance with Article 14.8 of GB 12267, and the items of initial test and final test shall be specified in the product standard. 5.5.7 Long-term test
The long-term test shall be carried out in accordance with Article 14.7 of GB 12267, and the items of initial test and final test shall be specified in the product standard. 5.6 Durability test
5.6.1 Design of test cycle
5.6 1.1 Comprehensive stress cycle cycle is shown in Figure 5. The first three times of the ... 7
W.5. 6.2 Test stress design
5.6.2.1 Electrical stress
CB/T 15527- 1995
The rated value of the input power supply voltage is ±7%, which should account for 50% of the cycle time, and the rated value accounts for 50% of the cycle time. 5.6.2.2 Temperature stress
Storage temperature: low temperature -50℃ for 1.75h, only for the first three cycles; high temperature 65℃ for 1.75h. Only for the first three cycles. Working temperature and humidity: 10℃ for 1/4 of the cycle working time, RH25%~75%, 25℃ for 1/2 of the cycle T working time. RH(93±3)% 50℃ for 1/4 of the cycle T working time, RH25%~75%. 5.6.2.3 Vibration stress
Should be as shown in Figure 5, and the specific plan shall be carried out in accordance with the provisions of 5.5.3. 5.6.3 Test plan
The reliability test plan of the receiver shall be determined by the manufacturer and the user in accordance with the following test plan based on the number of production batches and the test conditions that the manufacturer can provide.
5.6.3.1. When the receiver is finalized, a reliability identification test shall be carried out to verify whether the product meets the specified reliability requirements. The identification plan can use the standard timing truncation test plan in GB 5080.7. 5.6.3.2 When the receiver batch production is accepted and the true value of MTBF does not need to be estimated, the predetermined judgment risk rate (α, β) shall be used to make a qualified or unqualified judgment on the specified MTBF value. The plan can use the standard probability ratio sequential test plan in GR 5080.7. 5.6.4 Number of test samples
5.6.4.1 The number of test samples for reliability test shall be specified in the relevant contract or agreed upon by the manufacturer and user. 5.6.4.2 The recommended number of test samples is shown in Table 2. Table 2
Batch size
50--100
5.6.4.3 Failure judgment criteria shall be implemented in accordance with Article 9.2 of GB5080.1. 5.7 Maintainability test
The maintainability test method shall be determined by the product standard. 5.B Interference
Optimal number of samples
When measuring interference, the position of the controller that affects the conducted or radiated interference voltage shall be adjusted to determine the maximum radiation level. If the equipment has more than one power-on state, such as "working", "standby", etc., measurements shall be made for each state. 5-8.1 The measurement of conducted interference shall be carried out in accordance with the provisions of Articles 15.2.2 to 15.2.3 of GB 12267. 5-8.2 The measurement of radiated interference shall be carried out in accordance with Article 3.1b of GB 12267 and Article 15.3.2 of GB 12267. 5.8.3 The measurement of electromagnetic interference resistance shall be carried out in accordance with Appendix A (reference). 5.9 Safety test
The safety test shall be carried out in accordance with the provisions of Chapter 16 of GB12267. 6 Inspection rules
6.1 Inspection classification
a. Identification inspection:
b. Quality consistency inspection.
W.6.2 Identification test
6.2.1 Test sample
GB/T 15527—1995
Unless otherwise specified, the manufacturer should provide at least two products for identification test. 6.2.2 Test items
The test items are shown in Table 3. The test items in Table 3 can be increased or decreased through negotiation between the manufacturer and the user. Table 3 Inspection classification Inspection items General requirements Antenna/amplifier/bouncing device selectivity Line-out/preamplifier/wave impedance performance Electrical resistance Input protection capability Trip positioning time Compliance accuracy Navigation point function Connection signal Capture sensitivity Tracking sensitivity Display capability Positioning accuracy Reliability Maintainability Safety Note: The symbol “\” in the table indicates items that are inspected. The symbol “\” in the table indicates items that are not inspected. 6.2.3 Qualified evidence Quality consistency inspection All inspection items shall meet the specified requirements before they are judged as qualified for the identification inspection. Group D
Technical requirements
Article number
4. 3. 1.1
4. 3. 1. 4
4. 3. 2. 3
4. 3. 1. 7
4- 3. 1-11
4. 4. 1. 2
Important number
If it is found that most of the inspection items do not meet the requirements, the inspection should be stopped, the unqualified items should be analyzed and the source of the defects should be found out. After corrective measures are taken, the inspection can be continued. If the inspection items all meet the requirements specified in the product standards, it is judged as qualified in the inspection. If some items still do not meet the requirements after continuing the inspection, it is judged as unqualified in the inspection. 6.3 Quality consistency testbzxZ.net
6.3.1 Test grouping
The quality consistency test is divided into A, C and D test groups. 6.3.2 Group A inspection
W.6.3.2.1 Inspection items
For Group A inspection items, see Table 3.
Ce/T 15527-1995
6.3.2.2 Sampling plan
Unless otherwise specified, Group A sampling inspection shall be carried out in accordance with the relevant provisions of GB 2828, using a single sampling plan of general inspection level 1. The acceptable quality level (AQL) shall be selected from Table 4. Major defects
Minor defects
6.3.2.3 Acceptance or failure judgment criteria
Based on the results of sample inspection, if the number of defects found in the sample is less than or equal to the qualified judgment number, the batch of Group A inspection shall be judged to be qualified; otherwise, the batch of Group A inspection shall be judged to be unqualified. 6.3.2.4 New inspection
For the batch that fails the Group A inspection, the manufacturer shall separate the batch, find out the cause of the defect and take corrective measures. The re-delivered batch can be separated from the new batch and clearly marked with the sign of "re-inspection". The re-inspection can be carried out with strict inspection. Delivery inspection
If the new inspection is qualified, the batch is judged to have passed the Group A inspection, otherwise the batch is judged to have failed the Group A inspection. 6.3.2.5 Handling of qualified batches
For defective samples found in the batch that passes the Group A inspection, the contractor shall be responsible for re-sampling and delivering the batch according to the contract after passing the inspection. 6.3.3 Group C inspection
6.3.3.1 Inspection items
See Table 3 for the inspection items of Group C.
6.3.3.2 Sampling plan
Group C inspection shall be carried out on products from the qualified batch of Group A inspection. Unless otherwise specified, Group C sampling inspection shall be carried out in accordance with the relevant provisions of GB 2829. If the single or double sampling scheme of the discrimination system is used, the unqualified quality level (RQL) is selected from 50, 55.81. 6.3.3.3 Qualified and qualified judgment
According to the results of the sample inspection, if the number of traps found in the sample is less than or equal to the number of judgments, it is judged that the C group inspection is qualified, otherwise, it is judged to be unqualified.
6.3.3.4 Re-inspection
If the sample fails to pass the C group inspection, the acceptance and delivery of the product should be stopped. The manufacturer should find out the reasons and take corrective measures. The inspection can be re-conducted. The re-inspection can be stricter. When re-inspecting, the whole test or inspection can be re-conducted, or only the unqualified items can be tested or inspected. If the re-inspection is still unqualified, the C group inspection is judged to be unqualified. If the re-inspection is qualified, it is judged that the C group inspection is qualified, and the acceptance or delivery of the product should be resumed.
6.3.3.5 Inspection cycle
Unless otherwise specified, Group C inspection shall be conducted once for every three submitted batches, but not less than once a year. Group C inspection shall also be conducted when there are major changes in product design, materials, processes, etc. that may affect product performance. 6.3.3.6 Sample handling
Unless otherwise specified, for samples that have undergone and passed Group C inspection, the manufacturer shall repair all found or potential damage and re-submit Group A inspection. After passing the inspection, they shall be delivered according to the contract or order. 6.3.4 Group D inspection
6.3-4.1 Inspection items
The items for Group D inspection are shown in Table 3.
6.3.4.2 Inspection recommendations
Samples for Group D inspection shall be drawn from the products that have passed Group A inspection. The number of samples shall be as specified in the product standard. W.6.3.4.3 Inspection cycle
The same period of Group D inspection shall be specified by the product standard.
GB/T15527-1995
6. 3.4.4 Sample handling
Unless otherwise specified, samples inspected by Group D shall not be delivered as products: the handling of samples shall be negotiated between the ordering party and the manufacturer. 7 Labeling, packaging, transportation, storage
7.1 Marking
7.1.1 Product marking
2: Manufacturer name:
h. Product name!
c. South China Standard
Certificate: Product number or mark:
Manufacturing date or production batch number.
7.1.2 Packaging marking
The name, graphics, size and title color of the packaging marking shall comply with the provisions of GB191. 7.2 Packaging
7.2.1 Requirements for packaging
7.2.1.1 Requirements for cartons
1. Cartons must meet the requirements for packaging strength; b. After the carton is formed, the box shape is square, the four sides are strong, there is no overlap, no gaps, no looseness, and the box is evenly aligned. The moisture content of the carton should not be greater than 14%, and the surface of the cardboard used for making the box should be made of kraft paper. 7.2.1.2 Requirements for enterprise-owned and alliance-made boxes
According to the requirements, the packaging machine can use gold bellows and molded boxes for packaging, and the shrinkage rate is required to be solid and have sufficient strength. 7.2.2 Requirements for protective packaging
7.2.2.1 Anti-dew packaging
The packaging machine adopts effective shock measures. For example; lining material, foam plastic molding box, etc. 7.2.2.2 Anti-icing packaging
Use waterproof materials to remove or paste on the surface or inside of the packaging box. Commonly used waterproof materials include oil paper, plastic film, etc. 7.2.2.3 Anti-corrosion packaging
shall comply with the provisions of GB 5048.
7.2.2.4 Anti-rust packaging
shall comply with the provisions of GB4879.
7.2.2.5 Anti-reflection packaging
shall comply with the provisions of GB4768.
7.2.3 Documents accompanying the packaging box
Product certificate:
Product manual:
Packing list:
List of accompanying accessories.
7.3 Transportation
The packaged receiver should be transported by road, rail, water, air or any combination of the above without being directly affected by rain, driving and strong winds.
7.4 Storage
W.
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