Methods for calibration of vibration and shock pick－ps－Testing of transient temperature sensitivity

This standard specifies the test technical requirements and methods for transient temperature sensitivity of vibration and shock sensors. This standard applies to piezoelectric vibration and shock sensors. GB/T 13823.15-1995 Calibration method for vibration and shock sensors Transient temperature sensitivity test method GB/T13823.15-1995 Standard download decompression password: www.bzxz.net
This standard specifies the test technical requirements and methods for transient temperature sensitivity of vibration and shock sensors. This standard applies to piezoelectric vibration and shock sensors.

National Standard of the People's Republic of China
Calibration methods of vibration and shock pick-ups
Testing of transient temperature sensitivity
Methods for calibration of vibration and shock pick-upsTesting of transient temperature sensitivity1 Subject content and scope of application
GB/T 13823.151995
This standard specifies the test technical requirements and methods for the transient temperature sensitivity of vibration and shock sensors. This standard applies to piezoelectric vibration and shock sensors. 2 Technical requirements
2.1 Test environment conditions
Room temperature: 20℃±5℃;
Relative humidity: less than 75%. www.bzxz.net
Transient temperature difference: The transient temperature difference is 20℃±1℃. 2.2 Instruments and equipment
2.2.1 Mounting block
Use aluminum block, and its mass should be greater than 10 times that of the sensor to be tested. 2.2.2 Liquid and container
Alcohol with dry ice is preferred for liquid.
The liquid temperature should be 20°C ± 1°C lower than the sensor temperature. The volume of the container must be large enough to hold enough liquid to ensure that the liquid temperature rises by less than 1°C during the test. 2.2.3 Signal conditioner
The signal conditioner that matches the sensor should indicate the lower cutoff frequency of the high-pass filter actually used; the lower cutoff frequency of the unmatched signal conditioner should use the lowest limit, and 0.3Hz (-3dB) is recommended. 2.2.4 Waveform recorder
Frequency range: 0~10Hz;
Accuracy: better than Reading ±2%.
2.2.5 Temperature measuring instrument
Temperature range: 10℃～+30℃;
Accuracy: ±0.5℃.
2.3 Protective measures
Protective measures should be taken to prevent liquid from leaking into the sensor joint or penetrating into the interior. 3 Test procedure
3.1 Install the sensor on the aluminum block and connect the subsequent instruments. Approved by the State Administration of Technical Supervision on July 12, 1995 53
199 6-05-01 Implementation
GB/T13823.15-1995
3.2 Adjust the alcohol temperature to make it 20℃±1℃ lower than the sensor temperature. 3.3 Quickly immerse the piezoelectric sensor into the container, and be careful to prevent additional impact from causing electrical signal output, and measure the alcohol temperature to ensure that its change is less than ℃.
3.4 ​​Record the entire waveform obtained, and measure the highest peak and time of the first occurrence. 3.5 Take out the sensor and dry it naturally,| |tt||4 Result processing
The test results should give the time when the transient temperature sensitivity reaches the maximum value, and give the lower frequency limit of the signal conditioner used. The transient temperature sensitivity is calculated according to the following formula:
Where: S.--transient temperature sensitivity, m\s\/C; E--thermal transient output of the sensor under test. V or pC); S---reference sensitivity of the sensor under test, V/(m·s-2) or pC/(m·s-2); △tThe difference between alcohol temperature and room temperature, ℃.
Additional instructions:
This standard was proposed and coordinated by the National Technical Committee for Mechanical Vibration and Shock Standardization. The 74th Institute, the 2nd Institute, and the 511th Institute of China Aerospace Corporation were responsible for drafting this standard. The main drafters of this standard are Yang Qingtao, Wang Ruilin, Guo Yingchuan, Liu Yinghua, and Lu Min. 6505
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