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GB/T 20485.32-2021: Methods for the calibration of vibration and shock transducers - Part 32: Resonance testing - Testing the frequency and the phase response of accelerometers by means of shock excitation
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Methods for the calibration of vibration and shock transducers - Part 32: Resonance testing - Testing the frequency and the phase response of accelerometers by means of shock excitation
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GB/T 20485.32-2021
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Basic data | Standard ID | GB/T 20485.32-2021 (GB/T20485.32-2021) | | Description (Translated English) | Methods for the calibration of vibration and shock transducers - Part 32: Resonance testing - Testing the frequency and the phase response of accelerometers by means of shock excitation | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Word Count Estimation | 14,114 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20485.32-2021: Methods for the calibration of vibration and shock transducers - Part 32: Resonance testing - Testing the frequency and the phase response of accelerometers by means of shock excitation
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for the calibration of vibration and shock transducers - Part 32.Resonance testing - Testing the frequency and the phase response of accelerometers by means of shock excitation
ICS 17.160
J04
National Standards of People's Republic of China
Vibration and shock sensor calibration method
Part 32.Impulse Excitation Test for Resonance Test
Frequency and phase response of accelerometer
(ISO 16063-32.2016, IDT)
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Factors affecting measurement repeatability 1
4 Equipment and other devices 2
4.1 Environmental conditions 2
4.2 Reference Impact Ball 2
4.2.1 General 2
4.2.2 Reference impact ball size 2
4.2.3 Refer to the selection of the diameter range of the impact ball 2
4.2.4 Refer to the requirements of the impact ball mounting surface and thread tolerance 3
4.3 Hit the ball 3
4.4 Signal Analyzer 4
4.5 Conditioning amplifier 4
4.6 Auxiliary devices and methods 4
5 Step 5
5.1 Assemble the test structure 5
5.1.1 Installing the accelerometer under test 5
5.1.2 Installation reference impact ball 5
5.1.3 Install the guide tube of the impact ball 5
5.2 Connecting the instrument 6
5.3 Setting up the signal analyzer 6
5.3.1 Analyzer initialization 6
5.3.2 Setting measurement parameters 6
5.3.3 Setting display 7
5.3.4 Set Mark 7
5.4 Test 7
6 Results processing 7
6.1 Recording the time signal 7
6.2 Time signal processing 8
7 Results report 8
Foreword
GB/T 20485 "Vibration and Shock Sensor Calibration Method" has or plans to publish the following parts.
---Part 1.Basic concepts;
---Part 11.Absolute Vibration Calibration by Laser Interferometry;
---Part 12.Absolute Vibration Calibration by Reciprocity Method;
---Part 13.Absolute calibration of impact by laser interferometry;
---Part 15.Absolute calibration of angular vibration by laser interferometry;
---Part 16.Earth Gravity Method Calibration;
---Part 17.Centrifuge method absolute calibration;
---Part 21.Vibration comparison method calibration;
---Part 22.Impact comparison method calibration;
---Part 31.Transverse vibration sensitivity test;
---Part 32.Resonance test uses shock excitation to test the frequency and phase response of the accelerometer;
---Part 33.Magnetic Sensitivity Test;
---Part 41.Laser Vibrometer Calibration;
---Part 42.Gravitational acceleration method calibration of high-precision seismometers;
---Part 43.Accelerometer calibration based on model parameter recognition.
This part is part 32 of GB/T 20485 "Vibration and shock sensor calibration method".
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
The translation method used in this part is equivalent to ISO 16063-32.2016 ``Vibration and Shock Sensor Calibration Method Part 32.Resonance Measurement
Try impact excitation to test the frequency and phase response of accelerometers.
The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows.
---GB/T 2298-2010 Mechanical vibration, shock and condition monitoring vocabulary (ISO 2041.2009, IDT);
---GB/T 13823.20-2008 Vibration and shock sensor calibration method accelerometer resonance test general method
(ISO 5347-22.1997, IDT);
---GB/T 14412-2005 Mechanical installation of mechanical vibration and shock accelerometer (ISO 5348.1998, IDT).
This part is proposed and managed by the National Mechanical Vibration, Shock and Condition Monitoring Standardization Technical Committee (SAC/TC53).
Drafting organizations of this section. Beijing Institute of Aerospace Metrology and Testing Technology, China Institute of Metrology, Zhejiang University, Zhengzhou Institute of Machinery
Limited company.
The main drafters of this section. Yang Xiaowei, Zhu Gang, Liu Xin, Miao Yinxiao, Yu Mei, Hu Hongbo, He Wen, Dai Yilin, Ma Weiping.
Vibration and shock sensor calibration method
Part 32.Impulse Excitation Test for Resonance Test
Frequency and phase response of accelerometer
1 Scope
This part of GB/T 20485 specifies the instruments and procedures for testing the frequency and phase response of accelerometers with shock excitation.
This section applies to piezoelectric, piezoresistive and variable capacitance accelerometers with a damping ratio of less than 1, and the frequency range is up to 150kHz.
The accelerometer under test that requires this method to obtain frequency and phase response needs to have a good mechanical installation as stated in ISO 5348
Characteristics, and the mass of the reference impact ball exceeds at least three times the mass of the measured accelerometer.
The phase response of the measured accelerometer obtained by this method assumes that the accelerometer has input and output signals at a frequency of 0 Hz.
There is zero phase shift between.
Note 1.The user may notice that the frequency and phase response of the same accelerometer used in the field may be different, depending on the quality of the test structure,
Consistency and installation method. This method can only qualitatively evaluate the frequency and phase response of the accelerometer.
Note 2.Compared to focusing on sufficient dynamic range characteristics, users may not pay much attention to the initial part of the measured accelerometer frequency and phase response.
Resolution. The biggest advantage of obtaining accelerometer frequency and phase response through this method is to obtain the best number of spectral lines in the initial part of the above-mentioned characteristics.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
ISO 2041 Mechanical vibration, shock and condition monitoring vocabulary (Mechanicalvibration, shockandconditionmonito-
ring-Vocabulary)
ISO 5347-22 Vibration and shock sensor calibration method Part 22.Accelerometer resonance test general method (Methods
forthecalibrationofvibrationandshockpick-ups-Part 22.Accelerometerresonancetesting-General
methods)
ISO 5348 Mechanical vibration and shock-mechanical installation of accelerometers (Mechanical vibration and shock-Mechanical
mountingofaccelerometers).
3 Factors affecting measurement repeatability
The uncertainty limits of frequency response measurement are as follows.
For the resonant frequency of the measured accelerometer, the absolute uncertainty is equal to the resolution of the frequency analysis, which is the long time record of the accelerometer signal
The reciprocal of degrees. This method suggests that the minimum number of spectral lines in the frequency domain is 400.Assuming that the resonant frequency is in the middle of the frequency band, the standard of the resonant frequency is not accurate
The fixed degree is about 0.5%.
Note 1.This uncertainty is assumed to be uniformly distributed within the frequency resolution range.
For the damping ratio of the measured accelerometer, the uncertainty depends on the signal-to-noise ratio measured in the time domain.
Suppose that when the measurement is performed, the maximum value of the signal is close to the upper limit of the dynamic range of the measuring instrument and the typical damping ratio of the piezoelectric accelerometer is about
0.01, the standard uncertainty of the damping ratio measurement is about 1%.
Note 2.The signal analyzer used for damping ratio measurement should have a dynamic range of at least 80dB.
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