This standard specifies the basic requirements, instruments and operation methods for the secondary vibration calibration of vibration and shock sensors. This standard applies to linear motion working sensors, and its applicable range is as follows: Frequency range: 20~5000Hz. Dynamic range (depending on the vibration frequency): displacement: 0.1μm~10mm; velocity: 1mm/s~10m/s; acceleration: 10~1000m/s2. Error limit: for displacement and velocity sensors: (20~1000Hz) is ±4% of the reading; for acceleration sensors: (20~1000Hz) is ±2% of the reading, (20~2000Hz) is ±3% of the reading, (20~5000Hz) is ±5% of the reading. GB/T 13823.3-1992 Calibration method for vibration and shock sensors Sine excitation comparison method calibration (secondary calibration) GB/T13823.3-1992 Standard download decompression password: www.bzxz.net
This standard specifies the basic requirements, instruments and equipment used, and operating methods for the secondary vibration calibration of vibration and shock sensors. This standard is applicable to linear motion working sensors, and its applicable range is as follows: Frequency range: 20~5000Hz. Dynamic range (depending on vibration frequency): Displacement: 0.1μm~10mm; Speed: 1mm/s~10m/s; Acceleration: 10~1000m/s2. Error limit: For displacement and velocity sensors: (20~1000Hz) is ±4% of reading; for acceleration sensors: (20~1000Hz) is ±2% of reading, (20~2000Hz) is ±3% of reading, (20~5000Hz) is ±5% of reading.

National Standard of the People's Republic of China
Calibration methods for vibration and shock pick-ups
Calibration by sinuspidal excitation (secondary calibration) Methods for the calitration of vibration and shock pick-ups Comparison (secondary vibration) calibration by sinuspidal excitation 1 Subject content and scope of application
GB/T 13823.3--92
This standard specifies the basic requirements for the secondary vibration calibration of vibration and shock sensors, the instruments and equipment used, and the operating methods. This standard is applicable to linear motion working sensors, and its applicable range is as follows: Frequency range: 20~5000Hz.
Dynamic range (depending on vibration frequency): Displacement: 0.1 μm~10mm;
Velocity: 1mm/s~10 m/s;
Acceleration: 10~1 000 m/s*
Error limit:
For displacement and velocity sensors: (20~1000 Hz) is ±4% of the reading; For velocity transducers: (20~～1000Hz) is ±2% of the reading (20-2 000 Hz) is ±3% of the reading
(20~5 000 Hz) is ±5% of the reading.
2 Reference standards
GB/T13823.1 Calibration method of vibration and shock sensor Basic concepts GB/T 13823.2 Calibration method of vibration and shock sensor Laser interferometer method Vibration absolute calibration (one-time calibration) GB/T13823.5 Calibration method of vibration and shock sensor Installation torque sensitivity test 3 Instruments and equipment
3.1 Ambient temperature
20±5℃.
3.2 Standard accelerometer and amplifier
Under the selected frequency and speed conditions, laser interferometer is used to calibrate within the range of uncertainty of ±0.5%. 3.3 Signal generator
Accuracy, the maximum error of the given frequency is ±0.1% of the reading. Frequency stability: better than ±0.1% of the reading during the test period. Amplitude stability is better than ±0.1% of the reading during the test period. 3.4 Reporting station
Acceleration waveform distortion: not more than 5%. Lateral, bending and swing accelerations are kept to a minimum. At the frequency point used, the most artificially sensitive axis acceleration is 10; approved by the State Bureau of Technical Supervision on November 5, 1992 and implemented on October 1, 1993
1 000 H2 is allowed to be 20 years old
GB/T 13823.3-92
Multiplier: should be better than 60dB of full power output. Acceleration amplitude stability: better than ±0.1% of reading during the test. The strain of the sensor base caused by the mounting surface should not affect the calibration sensitivity. 3.5 True RMS voltmeter
Frequency range: 205000Hz.
Uncertainty: given error limit, maximum is +0.1% of reading. In voltage measurement, the true RMS value is multiplied by 2 to obtain the single peak value. 3.6 Degree of loss measurement instrument
Measurement range: 0~105%
Frequency range: 5Hz~10kHz
Accuracy: given error limit, maximum 10% of reading. 3.7 Oscilloscope
Used to observe the output signal waveform of the sensor. Frequency range: 5 ~5 000 Hz.
3.8 Force short measurement instrument
Measurement of sensor installation torque,
Base measurement range, 1.510 N·m.
Accuracy: better than 1.5% of full scale.
4 Preferred amplitude and frequency
Select six or more amplitudes and frequencies that can evenly cover the sensor's operating range according to the following series: Amplitude: 1.2, 5.10 and their multiples,
Frequency 20, 40, 80.160.315, 630, 1250, 2500.500011zg The selected value should correspond to the value calibrated with the standard accelerometer, 5 Operation method
5.1 Operation steps
5.1.1 Fix the standard accelerometer calibrated by the absolute method and the sensor to be calibrated back to back on the vibration generator according to the specified installation torque. The system is shown in the following figure:
Power drum
Vibration generator
Pregnancy generator
Standard accelerometer
Calibrated transducer
Amplifier II
Comparison method calibration measurement system diagram
5.1.2 Check the distortion and lateral motion of the two sensors at the calibration frequency and amplitude.
Distortion meter
Teaching pendant
Customer standard industry data free download5.1.3 Measure the output voltage of the two sensors. GB/T13823.3—92
5.1.4 Determine the reference sensitivity of the sensor to be calibrated. For the accelerometer, the frequency can be preferably selected as 160Hz (the second selection point is 80Hz), and the amplitude can be preferably selected as 100m/s* (the second selection point is 10m/s*). Then determine its recording sensitivity at other calibration frequencies and amplitudes, and give the percentage deviation compared with the reference sensitivity as the calibration result. 5.2 Calibration results
5.2.1 If the two sensors respond to the same vibration parameters, the sensitivity of the sensor being calibrated is calculated using formula (1): s,
Where: S, — standard sensor sensitivity, x — standard acceleration output:
— output of the sensor being calibrated.
5.2.2 If the two sensors respond to different vibration parameters, then S in formula (1) is equivalent to S in formula (2) and (3): and the sensitivity of the two sensors is converted by this formula:
S,= (2 yuan f) × Sa
Sa = (2nf)° × S.
S = (2 yuan f) × SvWww.bzxZ.net
Where, S. Added sensitivity +
S. Velocity sensitivity;
S. — displacement sensitivity 1
— vibration frequency, Hz
(3)
(1)
5.2.3 The total uncertainty of the calibration shall be calculated with the corresponding confidence level according to Appendix A (Supplement). The confidence level shall be 95%. A1 Calculation of total uncertainty
GB/T 13823. 3-92
Appendix A
Calculation of uncertainty
(Supplement)
This standard specifies the total uncertainty X4 of the calibration with a confidence level (L=95%).
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