Methods for calibration of vibration and shock pick－ps－Testing of temperature response by comparison

This standard specifies the technical requirements and methods for the temperature response comparison test of the sensitivity of vibration and shock sensors. This standard applies to linear vibration and shock sensors. GB/T 13823.16-1995 Calibration method for vibration and shock sensors Temperature response comparison test method GB/T13823.16-1995 Standard download decompression password: www.bzxz.net
This standard specifies the technical requirements and methods for the temperature response comparison test of the sensitivity of vibration and shock sensors. This standard applies to linear vibration and shock sensors.

National Standard of the People's Republic of China
Calibration method of vibration and shock pick-ups
Testing of temperature response by comparison
Methods for calibration of vibration and shock pick-upsTesting of temperature response by comparison1 Subject content and scope of application
GB/T 13823.16—1995
This standard specifies the technical requirements and methods for testing the sensitivity of vibration and shock sensors by temperature response comparison method. This standard is applicable to linear vibration and shock sensors. 2 Reference standards
GB/T13823.1 Calibration method of vibration and shock sensors Basic concepts
GB/T13823.3 Calibration method of vibration and shock sensors 3 Technical requirements
3.1 Test environment conditions
Temperature: 20℃±5℃;
Relative humidity: less than 75%.
3.2 Test range
Sine excitation comparison method calibration (secondary calibration) Within the following test range, the sensitivity temperature response error limit is ±10% of the reading. Frequency: 20~250Hz.
Amplitude: 10-4~10mm (depending on frequency), b.
Speed ​​amplitude: 10-3~~1m/s (depending on frequency), acceleration amplitude: 1~100m/s2 (depending on frequency). Temperature: 65~+800℃.
3.3 Instruments and equipment
3.3.1 Vibration instruments and equipmentwww.bzxz.net
Vibration instruments and equipment shall comply with the provisions of vibration comparison method calibration in GB/T13823.3. 3.3.2 Temperature test chamber
3.3.2.1 The temperature non-uniformity of the working space in the chamber is ±3℃ (-65～+100℃),
±5℃ (above 100℃).
3.3.2.2 Thermal isolation measures should be taken between the vibration generator, standard sensor and constant temperature chamber to ensure that the vibration generator works normally when the temperature changes.
The influence of temperature change on the transfer function error of the standard sensor and the mounting rod should be less than ±0.5%. 3.3.3 Standard sensor and matching signal conditioner Approved by the State Administration of Technical Supervision on July 12, 1995 606
Implementation on May 1, 1996
Frequency range: 10～500Hzz
GB/T13823.16-1995
Uncertainty: better than ±0.5% (at the reference vibration level and reference frequency). 3.3.4 Uncertainty of voltmeter: better than ±2% of reading.
3.3.5 Signal generator
Frequency accuracy: better than ±0.5% of reading; Frequency stability: better than ±0.2% of reading during the test; Amplitude stability: better than ±0.1% of reading during the test. 3.3.6 Oscilloscope
Frequency range: 0～10 kHz.
3.3.7 Temperature measuring instrument
Temperature range -65～+800℃;
Accuracy: ±1℃
(65~～+100℃)
(above 100℃)
3.4 ​​Optimum amplitude, frequency and temperature
Acceleration amplitude: 1, 2, 5, 10m/s and their 10 times. Frequency: 20, 40, 80, 160, 315, 630, 1250 Hz, 160 Hz is the reference frequency. Temperature: -65, -50, 40, 25, -10, 0, 20, 40, 60, 70, 80, 100, 155, 200, 250, 400, 800 °C. Generally, 25 °C and 70 °C are selected.
At the selected frequency and amplitude, refer to the relevant provisions in GB/T13823.1, and take 6 temperature values ​​that evenly cover the measurement range within the temperature range of the sensor.
4 Test method
4.1 Principle of the method
The comparison method is adopted, and its principle is shown in GB/T13823.1.4.2 Test procedure
4.2.1 According to 3.1, the standard sensor is installed on the table of the vibration generator outside the temperature chamber, and the sensor to be calibrated is installed on the table extending into the temperature chamber through the mounting rod. The two sensors are coaxially rigidly fixed. 4.2.2 Adjust the temperature in the chamber to the specified value, and then start measuring the sensor temperature. Make the ratio of two consecutive time intervals of 3°C temperature change of the sensor greater than 1.7 to ensure that the temperature of the sensor to be tested is stable. 4.2.3 Adjust the vibration generator system to the required frequency and vibration level. After stabilization, measure the sensitivity of the sensor at the corresponding frequency and vibration level of each temperature point.
4.3 Result processing
4.3.1 The sensitivity error at each temperature is calculated using the following formula: ei
× 100%
The sensitivity error of the calibrated sensor at a certain temperature relative to room temperature; where: —
St; —Sensitivity of the calibrated sensor at a certain temperature, V/(m*s-1), V/(m·s-2) or pC/(m·s-2); S---Sensitivity of the calibrated sensor at room temperature, V/(m·s-1), V/(m·s-2) or pC/(m·s-\). 4.3.2 The maximum temperature response error within the specified temperature range is calculated by the following formula: Sum --S
X 100%
Where: etm
The maximum temperature response error of the sensor being calibrated relative to room temperature; (1)
GB/T13823.16--1995
S..—The sensitivity value of the sensor being calibrated within the specified temperature range compared with the sensitivity at room temperature. V/(m·s1), V/(m·$2) or pC/(m·s2). 4.3.3 Draw the sensitivity temperature response curve of a certain frequency level at different temperatures. Additional notes:
This standard is proposed and standardized by the National Technical Committee for Vibration and Shock Standardization. This standard was drafted by the 74th, 3rd and 5th Institutes of China Aerospace Corporation. The main drafters of this standard are Yang Qingtao, Wang Ruilin, Guo Yingchuan, Liu Yinghua and Tai Min.
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