GB/T 4451-1984 Industrial automation instrument vibration (sinusoidal) test method

This standard specifies the test method for industrial automation instruments (hereinafter referred to as instruments) to withstand vibration during use. The instrument should be subjected to vibration test according to the method specified in this standard. The vibration test level can be selected from the vibration test parameter table. For instruments used under special vibration conditions, the vibration test method shall be determined by the parties concerned through consultation. GB/T 4451-1984 Industrial Automation Instrument Vibration (Sinusoidal) Test Method GB/T4451-1984 Standard Download Decompression Password: www.bzxz.net

UDC681.2:621-503:534.61
National Standard of the People's Republic of China
GB 4451—84
(Sinusoidal)
Industrial Automation Instrument Vibration
Test Method
Methods of vibration (sinusoidal) test for usein industrial process measurementand control instrument
Published on June 3, 1984
Approved by the State Bureau of Standards
Implemented on April 1, 1985
National Standard of the People's Republic of China
Industrial Automation Instrument Vibration
1 (Sinusoidal)
Test Method
(sinusoidal) test for use
Methods of vibration (sinusoidal) test for use
in industrial process measurementaod control instrument
UDC 681.2:621
503:534
GB 4451—84
This standard specifies the perturbation method for industrial automation instruments (hereinafter referred to as instruments). The instruments shall be subjected to vibration tests according to the methods specified in this standard, and the vibration test levels can be selected from the vibration test parameter table. The vibration test method for instruments used under special vibration conditions shall be determined by the parties concerned through consultation. This standard does not apply to instruments installed on moving objects. Terms and definitions
This standard adopts the terms and definitions specified in the following standards: GB2422—81 "Basic Environmental Test Procedures for Electrical and Electronic Products: Test Methods for Electrical and Electronic Products: Vibration (with String) Test Methods"; b.
GB2298—81 "Terms and Terms for Mechanical Dynamic Shock" 2 When the instrument is subjected to vibration test, the vibration test parameters of each level shall be as specified in the following table. Vibration test parameter table
auxiliary value +
10 ~ 55
10 ~ 500
acceleration
each parameter is selected by the relevant parties through consultation
thermal velocity
(each direction)
frequency test
(dance direction)
, refers to the constant displacement amplitude below the crossover frequency and the constant acceleration amplitude above the crossover frequency. The crossover frequency is between ? ~ 62{. The crossover frequency is calculated according to the following formula
element
formula: f——crossover frequency, Hz 1
velocity amplitude, m/s2,
Fs displacement amplitude, mm.
**The test parameter values ​​of grade D should be selected from the values ​​specified in GB4439-B4 "Report on the working conditions of industrial automation instruments". Issued by the National Bureau of Standards on June 30, 1984
Implementation on April 1, 1985
GB4461-84
Application examples for selecting vibration test levels based on instrument working conditions and installation categories are shown in Appendix A (reference). Before, during and after the vibration test, the performance of the instrument should comply with the provisions of the product standard and no mechanical damage should occur. During the vibration test, the instrument should usually be supplied with energy and 50% of the input signal under reference conditions. For instruments that are difficult to achieve the above requirements, they can be specified separately in the product standard. For vibration test compliance Requirements
When the instrument (including the central fixture) is installed on the moving table for testing, the basic movement of each fixed point of the instrument should be a sinusoidal function of time, and basically move in a straight line. The lateral movement, acceleration waveform distortion and amplitude error should all comply with the provisions of the national standard GB2423.10-81.
6 The instrument should be installed on the moving table according to the normal installation method specified in the manufacturer's instructions. The moving joint, mounting plate and fixture used to support the instrument should have sufficient rigidity to minimize the excitation loss transmitted to the instrument. The amplitude change and waveform distortion caused by the mounting plate and fixture should be minimized. If the structure of the instrument permits or the center of gravity of the instrument does not affect its working performance and test results, the instrument can be installed on the vibration table in other ways. ||tt ||Instruments used with shock absorbers should usually be tested together with the shock absorbers. If the original shock absorbers cannot be used for testing, special installation methods and test methods must be specified in the product standards. 7 If the appearance and quality of the instrument do not allow the entire instrument to be installed on existing test equipment for testing, it is allowed to be tested as independent functional components, and the test method should be specified separately by the product standard. 8 Test procedure
8.1 Pretreatment
It should be specified in the product standard whether the instrument requires pretreatment. Such as preheating, pressurization, etc. 8.2 Initial inspection
Check the appearance quality and performance of the instrument in accordance with the provisions of the product standard. 8.3 Condition test
The instrument should be subjected to vibration test in three mutually perpendicular axes in sequence. This test is divided into There are three stages: Stage 1: Initial vibration response check. The purpose of this stage of the test is to determine the instrument's response characteristics to the toggle. According to the amplitude and frequency range specified in the product standard, the vibration response check is carried out in a logarithmic continuous scanning manner, with a sweep rate of 0.5 octaves per minute. During the vibration response check, the instrument should be checked to determine the dangerous frequency that causes the following phenomena: a. Instrument performance out of tolerance or failure due to vibration; b. Mechanical spectrum vibration or other response phenomena.
Record the frequency and amplitude of the above phenomena, and record the performance changes of the instrument. Stage 2: Durability test.
The purpose of this stage of the test is to check the instrument's ability to withstand vibration. The use of sweep frequency test or (and) fixed frequency test should be specified by the product standard.
, sweep frequency test. According to the amplitude, frequency range and number of test cycles specified in the product standard, the durability test is carried out in a logarithmic continuous scanning manner, with a sweep rate of 1 octave per minute. b. Fixed frequency test. According to the value and test time specified in the product standard, the durability test is carried out at the most dangerous frequency found in the initial vibration response inspection. If no obvious dangerous frequency is found in the initial vibration response inspection, the durability test is carried out at the upper frequency of the specified frequency range.
Stage 3: Final vibration response inspection.
The purpose of this stage of test is to determine whether the vibration response characteristics of the instrument change after the instrument is subjected to the durability test. The test method is the same as the initial vibration response inspection.
8.4 Recovery
GB 4451 84
If required, the product standard may specify that the instrument has a recovery time after the vibration test so that the instrument can be restored to the same conditions as the initial test. For example, temperature influence.
8.5 Final inspection
After the vibration test, check the appearance quality and performance of the instrument according to the provisions of the product standard. Instrument working conditions and installation categories
Control room for instruments with weak control or weak triggering On-site instrument mounting rack or control panel
Pipeline or mechanical equipment
Additional instructions:
GB 4451—84
Appendix AWww.bzxZ.net
Application examples
(reference)
Selection level
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of Shanghai Industrial Automation Instrument Research Institute. This standard is drafted by Shanghai Industrial Automation Instrument Research Institute. The main drafter of this standard is Cheng Guogou.
This standard is entrusted to Shanghai Industrial Automation Instrument Research Institute for interpretation. Equipment, such as recorders and regulators installed in the control room, such as transformers and pressure gauges installed on site, such as actuators and thermal resistors, etc. 3C is suitable for small detection instruments or actuators. National Standard of the People's Republic of China Industrial Automation Instrument Vibration (Sine) Test Method GB4451- 84
Shanxi edition of China Standard Press
(Beijing Fuwai Sanyahe)
Printed by Printing Workshop of China Standard Press
Distributed by Beijing Publishing House of Xinhua Bookstore Sold by Xinhua Bookstores in various places*
Format 880×12301/16 Printing account 1/2 Number of words 5,000 First edition in November 1984 First printing in November 1984 Number of copies: 1-8,000
Book number: 15169+1-2701 Price 0.20 yuan standard day 12 52
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