Some standard content:
JB/T9942—1999
This standard is revised on the basis of ZBJ51008--89 "Grating Angular Displacement Sensor". The technical content of this standard is basically consistent with that of ZBJ51008-89, and the main differences are: - According to the needs of market and technical development, the working voltage is increased by ±5V; - The relative humidity requirement for working climate conditions is slightly reduced; - In order not to confuse with system accuracy, the subdivision accuracy is changed to subdivision precision; - According to relevant regulations, the mean trouble-free working time classification should start from 5000h; - It has been re-edited according to relevant regulations. This standard replaces ZBJ51.008-89 from the date of implementation. Appendix A and Appendix B of this standard are both standard appendices. Appendix C of this standard is a reminder appendix. This standard is proposed and managed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Beijing Machine Tool Research Institute. The main drafters of this standard: Zhao Huiying, Wei Changqi, Xing Guochun. 640
Standard of the Machinery Industry of the People's Republic of China
Grating Angular Displacement Sensor
JB/T9942—1999
Replaces ZBJ51 008—89
This standard specifies the structural type and basic parameters, technical requirements, test methods, inspection rules and markings, packaging and storage of grating angular displacement sensors.
This standard is applicable to angular displacement sensors with circular grating discs as detection elements. It forms an angular displacement measurement system with a digital display, and is mainly used for digital display and numerical control of machine tools and instruments.
2. Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—1990 Pictorial symbols for packaging, storage and transportation
GB/T4857.5-1992 Basic tests for transport packages: Vertical impact drop test method
GB/T4857.7-1992 Basic tests for transport packages: Sinusoidal vibration (rated) test method GB/T 6587.2—1986
Electronic measuring instruments
Temperature test
GB/T6587.3—1986 Electronic measuring instruments GB/T 13306--1991
GB/T13384:1992
Packaging for electromechanical products
Structural type and basic parameters
3.1 Structural type
Humidity test
General technical conditions
Open-type grating angular displacement sensor, the reading head is separated from the circular grating disk. The closed grating angular displacement sensor consists of a complete assembly of a reading head and a circular grating disk. 3.2 Model
The model of the grating angular displacement sensor is indicated as follows: G
-Arabic numerals, indicating specifications
Chinese phonetic letters, K-indicates open type
F-indicates closed type
Chinese phonetic letters, indicating angular displacement
Chinese phonetic letters, indicating grating
3.3 Basic parameters
The basic parameters of the grating angular displacement sensor shall comply with the provisions of Table 1, and the connection form and size of its transmission shaft shall be given in the product manual.
Approved by the State Bureau of Machinery Industry on May 20, 1999, and implemented on January 1, 2000
Number of output pulses per revolution
Maximum speed
Working voltage
JB/T9942—1999
100;150;250;300;360:400;500:600;720;800;1000;1080;1 440;1 500,1 800;2 000;2 400,2 500;3 600;5 000;5 400;7200,9000;10000;10800;12500;12960;18000;21600;25920:32400;36 000;64 800;129 600
Group A 1;6;15;39;60
600;1000,2000,3000;5000
±5;
+12;
The output pulse per revolution of the sensor with frequency multiplication in the pre-circuit should be the parameter in Table 1 multiplied by the frequency multiplication number. 2 In the table, represents "number of pulses" and r represents "revolution". 4 Technical requirements
4.1 Environmental adaptability
4.1.1 Climate environment
The working climate conditions and storage and transportation climate conditions of the grating angular displacement sensor are shown in Table 2. Table 2
Climate conditions
Ambient temperature
Relative humidity
4.1.2 Mechanical environment
≤83 (at 20℃±5℃)
≤90 (at 20℃±5℃)
4.1.2.1 The grating angular displacement sensor is allowed to be subjected to general vibration and impact in the case of packaging, and meets the test requirements specified in GB/T4857.7, and the vibration time is 40min. 4.1.2.2 After the properly packaged product is inspected after the car has traveled 200km on a third-level highway at a speed of 25~~40km/h, it should be able to maintain its performance and technical indicators, and it is allowed to be equivalent to 4.1.2.1. 4.1.2.3 The correctly packaged product shall meet the drop test requirements specified in GB/T4857.5, with a drop height of 300mm. 4.1.3 Environmental conditions
The grating angular displacement sensor shall be operated and stored in an environment without corrosive gases and obvious oil mist. 4.1.4 Power supply environment
When the working voltage error is within ±6%, the sensor can work normally. 4.2 Function
4.2.1 After the grating angular displacement sensor is correctly installed and forms a measurement system with the digital display, the sensor can read continuously when rotating, and can normally display the angle value or the number of pulses per revolution within the range of 642
JB/T9942—1999
360°. 4.2.2 For grating angular displacement sensors with reference zero, the reference zero function display shall be correct, and only one reference zero is allowed within the range of 360°.
4.3 Appearance quality and structural performance
4.3.1 The outer surface should be flat and smooth, without obvious mechanical damage and defects, and the oxidation surface and coating and plating surface should be uniform and without falling off. 4.3.2 All disassembled or replaceable structural parts should ensure good interchangeability during design and manufacturing. 4.3.3 The fastening and welding parts of the grating angular displacement sensor should be firm, and the plug and socket interface should have reliable contact and appropriate tightness. 4.3.4 The performance of products with dustproof, waterproof and oil-proof structures should comply with the provisions of the product technical documents. 4.3.5 The starting torque, moment of inertia, and allowable axial and radial loads of the grating angular displacement sensor should be given in the manual. 4.4 Accuracy
The accuracy of the grating angular displacement sensor is expressed by half of the maximum interval error with the "土" sign, and is divided into two groups according to the use requirements, see Table 3.
4.5 Grating angular displacement sensor output signal
Accuracy
±0.25″
±2”
Accuracy
±o.125 r
4.5.1 The amplitude and quality of the grating angular displacement sensor output signal shall comply with the system’s maximum speed and subdivision accuracy requirements. 4.5.2 Each type of product shall indicate the type of signal waveform, number of signal paths, signal amplitude range, allowable signal DC level variation range, phase difference variation between each signal path, and sinusoidal error (distortion) in the instruction manual. 4.5.2.1 Square wave output
4.5.2.1.1 The combination of output signal paths shall comply with the requirements of Table 4. Table 4
4. 5, 2. 1. 2
See Figure 1 for the waveform.
Number of signal paths
Signal composition
A, B and R or R
A, A, B and B
A, A, B, B and R1 or RI
A, A, B, B, R1 and RI
0 signal
180 signal
90 signal
270° signal
Digital reference zero signal
Reference zero reverse signal
JB/T 9942-—1999
wt—Angular displacement; U—Voltage
Figure 1 Output waveform
, 4.5.2.1.3 The high and low level ranges of the signal should be given in the manual. Wt
4.5.2.1.4 The duty cycle of the output signal and the phase difference change of two adjacent 90° signals are shown in Table 5. Table 5
Sine wave output
4. 5.2. 2.1
Signal duty cycle (phase angle)
180°: 180°±15°
180°: 180°±30°
The combination of the number of output signal paths shall comply with the provisions of Table 6. Table 6
Number of signal paths
Phase difference variation (phase angle)
90°±15°
90°±30°
Signal group
A, B and RI
A, A, B and B
A, A, B, B and RI or RI
AA, BB, R1 and R1
4.5.2.2.2 See Figure 2 for the waveform.
JB/T 99421999
4.5.2.2.3 The output current signal amplitude and rated load of the sensor shall be given in the instruction manual. 4.5.2.2.4 The rate of change of the output signal DC level within one rotation of the sensor and the change in the phase difference between two adjacent 90° signals shall be in accordance with Table 7.
Signal DC level change rate%
All products with reference zero must provide the following parameters for the reference zero pulse signal: 4.5.3bzxZ.net
There is a reference zero level range;
There is a reference zero pulse amplitude;
There is a reference zero pulse width.
0 signal
180° signal
90 signal
270 signal
Reference zero signal
Reference zero inverted signal
at-angular displacement U voltage
Figure 2 Output waveform
Phase difference change (phase angle)
90°±5°
90°±8°
90±15°
90°±30°
4.6 Anti-interference performance
JB/T 9942--1999
After the grating angular displacement sensor and the qualified digital display form a system, they are tested according to Appendix B (Appendix of the standard) under specified conditions. The error caused is no more than plus or minus a minimum indication value, and can be clearly distinguished. 4.7 Reliability
The reliability of the grating angular displacement sensor is measured by the mean time between failures (MTBF), the specific value of which should be given in the product manual, but should not be less than 5000h. The classification of the mean time between failures is shown in Table 8. Table 8
4.8 One-time unpacking pass rate
10000h
The product is inspected and packed into the warehouse. The one-time unpacking pass rate after storage and transportation should not be less than 95%. 4.9 Warranty period
The manufacturer shall be responsible for warranty if the product is damaged or cannot work normally due to poor manufacturing quality within 18 months from the date of shipment from the manufacturer, provided that the user complies with the instruction manual. 5 Test method
5.1 Environmental adaptability test
5.1.1 The climate environment test shall be carried out in accordance with GB/T6587.2 and GB/T6587.3, and the results shall comply with the provisions of 4.1.1. 5.1.2 The mechanical environment test shall be carried out in accordance with GB/T4857.5, GB/T4857.7 and Appendix A of this standard (Appendix to the standard), and the results shall comply with the provisions of 4.1.2.1 to 4.1.2.3.
5.2 Functional test
The sensor under test and the digital display form a system, simulate the use state, and rotate the sensor transmission shaft 360° and rotate forward and reverse near the zero mark. The results shall comply with the provisions of 4.2.1 and 4.2.2. 5.3 Appearance quality and mechanical structure inspection
The appearance quality and mechanical structure shall be inspected by visual inspection and touch method, and shall comply with the provisions of 4.3.1 and 4.3.2. 5.4 Accuracy test
5.4.1 After the angular displacement sensor to be tested is connected to the digital display as a system on the angular displacement test bench, the sensor to be tested is installed in a simulated use state under working climate conditions and the angular displacement is compared with the polyhedron photoelectric collimator or circular laser interferometer. The number of measuring points within the 360° range should not be less than 12 points, and the result is indicated by the half of the maximum error value and the "±" sign, which should comply with the provisions of 4.4 and Table 3. 5.4.2 The limit error of the angular displacement measurement system should not be greater than one-third of the verification error of the tested product. When the accuracy is less than or equal to ±0.5\, the limit error of the measurement system is not greater than half of the verification error of the tested product. 5.5 Output signal test
Use the harmonic analysis method to detect, or use an oscilloscope, phase meter and multimeter to check, and the result should comply with the provisions of 4.5. 5.6 Anti-interference test
After the angular displacement sensor is connected to a qualified digital display to form a system, the test shall be carried out according to the conditions specified in Appendix B, and the results shall comply with the provisions of 4.6.
5.7 Reliability test
5.7.1 The mean time between failures (MTBF) test shall be carried out in accordance with relevant regulations. The results shall comply with the provisions of 4.7. For the provisions on failure identification and calculation of failure, please refer to Appendix C (suggestive appendix). 5.7.2 Randomly sample qualified products from the factory, and the sampling quantity shall be in accordance with the provisions of Table 9. 646
6 Inspection rules
Batch or continuous production quantity
1~～3
97~200
200 and above
JB/T 9942--1999
Recommended sampling number
Products must pass the manufacturer's quality inspection before leaving the factory, and documents proving the quality of the products should be attached. 6.1
6.2 The factory inspection items include the contents of 4.2.1, 4.2.2, 4.3.1~4.3.4 and 4.4. 6.3 Type test Except for 4.7 and 4.9, all technical requirements specified in Chapter 4 should be fully inspected. The number of test samples shall be no less than three sets, and it is stipulated that the test shall be carried out when one of the following conditions is met: a) New product identification;
Major changes in design;
Changes in major process methods;
Changes in key materials and components,
When production is interrupted for more than one year;
f) Generally, the test is carried out once every two years in normal production. When a fault occurs during the inspection or any item is unqualified, the sampling inspection shall be doubled; if it is still unqualified, it shall be judged as unqualified. 6.4 When there is a dispute between the user and the manufacturer on quality issues, an arbitration test shall be carried out on the disputed items. The test may be jointly participated by both parties or conducted by the higher-level competent authority. Marking, packaging, transportation and storage
7.1 Marking
7.1.1 The product brand must be fixed in an obvious and appropriate position. Its type, size and technical requirements shall comply with the provisions of GB/T13306, including:
Manufacturer name;
Product name and model;
Number of output pulses per revolution of the angular displacement sensor; accuracy level;
Output signal waveform;
Factory number and manufacturing date.
The outer wall of the packaging box should be marked with: product name, manufacturer name, product model, net weight, gross weight, size (length × width × height) and receiving unit.
Transportation and storage signs should be marked with words or patterns such as "Handle with care" and "Do not invert". The signs should comply with the provisions of GB191. 7. 1. 3
7.2 Packaging
“The product packaging shall comply with the provisions of GB/T13384.7.3 Storage
The angular displacement sensor shall be stored in a ventilated, dry warehouse without corrosive gas.647
7.4 Random Documents
The following documents shall be attached to the product:
Product instruction manual;
Product certificate;
Product packing list.
JB/T9942—1999
Road surface: Intermediate road surface of third-class highway.
Mileage:200 km.
Speed: 25-40km/h.
Vehicle type: 4t truck.
Load capacity: one third of full load
JB/T 9942—1999
Appendix A
(Appendix of the standard)
Test conditions for sports cars
Packaging location: rear of the vehicle compartment, and properly fixed. Appendix B
(Appendix of the standard)
Anti-interference performance test
B1 Anti-interference performance test I
Connect the angular displacement sensor and a digital display with qualified anti-interference performance into a system and then test. The anti-interference performance test is recommended to be carried out as follows. B1.1 On the same power grid as the digital display, artificially create the following interference: a) Use a 40A AC contactor to start and stop a 5-10kW motor every 5 minutes or so, and test it 20 times; use an electric welder to weld for 20 minutes 2m away from the digital display; b)
Switch the electric fan, plug in and out the soldering iron or use a 6mm diameter AC/DC hand drill to open and close it 10 times; c)
Use a 75A three-phase AC contactor to continuously switch on and off 30 times; d)
5m away from the digital display, use any thyristor power supply below 5kW to work continuously (only do this test for digital displays with a pulse equivalent of 10μm).
Anti-interference performance test II
B2.1 Power line low-frequency repetitive interference conduction sensitivity test The schematic diagram of the low-frequency repetitive interference source is shown in Figure B1. B2.1.1
B2.1.2 Low-frequency repetitive interference wave waveform: JB/T9942—1999
Low-frequency repetitive interference waves are superimposed on the peaks and troughs of the AC voltage of the power line at a repetition frequency of 100 cycles per second; a)
b) Each cycle group consists of a decaying cosine oscillation wave with a frequency of 100kHz, and its envelope decays to half of the first half-wave peak value after reaching 1.5 cycles;
c) The low-frequency repetitive interference wave is divided into 30 levels according to the first half-wave peak voltage, and each level represents a voltage of 100V; d) The output impedance of the low-frequency repetitive interference source is 150α; The voltage waveform of each repetitive interference wave is shown in Figure B2. e)
B2.1.3 Test wiring diagram and test steps
The digital display system should be tested for anti-interference performance under the condition of a rated voltage change of +10% to -15%. Differential mode interference is connected as shown in Figure B3.
Differential mode test is connected as shown in Figure B4.
Indicator
Voltage regulator
Isolation network
Signal source
Working performance
Monitoring equipment
Voltage regulator
JB/T9942-—1999
Oscilloscope
Isolation network
Signal source
Working performance
Monitoring equipment
Run the inspection program during the test, adjust the low frequency repetition to the interference source output voltage, gradually increase the differential/common mode interference level, when the digital display system cannot work normally, write down the type of fault and the corresponding interference level. Differential mode interference should not be lower than level 10, and common mode interference should not be lower than level 25. B2.2 Power line high frequency conduction sensitivity test B2.2.1 Test signal source
RF power signal generator or a combination of RF signal generator and power amplifier, with an output impedance of 50Q. B2.2.2 Test wiring diagram and test steps
The test is wired according to Figure B5. The high frequency interference signal generated by the signal source is added to the test product through the power line. The test product is connected to the power supply through an isolation network. During the test, the load resistor R in the isolation network should be disconnected so that the interference signal is added to the test product. The signal source, cable, and coaxial wiring plug should be coaxially connected, and their characteristic impedances should be consistent. The test product runs the inspection procedure at rated voltage. Adjust the signal source so that its output level is increased to 1V and the frequency varies in the range of 0.15 to 300MHz. First scan the entire frequency band, and then select 10 frequency points for testing according to Table B1. The digital display system should be able to work normally, otherwise record the type of fault and the corresponding sensitive frequency point. 651
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