GB/T 5170.15-1985 Basic parameters verification method for environmental test equipment for electrical and electronic products Hydraulic vibration table for vibration (sinusoidal) test GB/T5170.15-1985 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Environmental testing equipment for electric and electronic products
Basic parameters verification methods
Hydraulic vibration table for vibration (sinusoidal) testUDC 621.3
.002.6-T9
GB5170.15—85
This standard specifies the verification methods for basic parameters of hydraulic moving test table system (hereinafter referred to as moving table) for vibration test according to GB2423.10 "Basic environmental testing procedures for electric and electronic products Test Fc: Moving (sinusoidal) test method". The vibration table consists of a vibration table body, a hydraulic source, a control and measurement device, and a horizontal workbench (when required by the test system). 1 Verification items 1.1 Rated parameters 1.1.1 Thrust 1.1.2 Frequency range 1.1.3 Load a. Maximum load b. Load eccentricity short c. Maximum anti-bumping moment (when horizontal vibration) 1.1.4 Motion amplitude No-load maximum acceleration variation Full-load maximum acceleration amplitude: Maximum speed amplitude; Maximum displacement amplitude.
Acceleration wave distortion
1.3 Horizontal vibration
Amplitude uniformity of tabletop hydraulic dynamics
Frequency indication depth difference
Frequency stability
Amplitude indication error
1.8 Background noise speed
1.9 Fixed vibration accuracy
1.10 Maximum level of radiated noise
1.11 Continuous working time
Sweep rate error
Published by the National Bureau of Standards on April 7, 1985
Implemented on January 1, 1986
2 Main instruments for calibration
Accelerometer:
Three-axis accelerometer:
GB 517G.15—B5
Sine vibration measuring instrument (hereinafter referred to as vibration measuring instrument, which shall include multi-channel amplifier, frequency selector, operator and display): frequency meter
distortion meter
level recorder;
low frequency oscillator;
sound level meter.
3 General provisions
3.1 Calibration load
The calibration load shall be a rigid body with symmetrical appearance made of metal material, and its mass, center of mass quotient and eccentric moment shall comply with relevant regulations. The semi-surface tolerance of the contact surface between the load and the vibration table surface is 0.1/100, and the finish is grade 6. The load is connected to the table in a linear manner, and its installation resonance frequency shall be outside the test frequency range.
3.2 For a mobile table that can perform horizontal vibration, the frequency indication error shall be eliminated during the calibration. Except for frequency stability, sweep frequency error, and amplitude indication error, the rest shall be calibrated in accordance with the corresponding clauses in the calibration method. 4 Calibration method
4.1 Calibration method for rated parameters of vibration table
Rated parameters of vibration table include:
Frequency range:
Maximum acceleration amplitude under no load;
Maximum acceleration amplitude under full load:
d. Maximum velocity amplitude;
e: Maximum displacement amplitude.
4.1.1 Test conditions
The vibration table is no-load and full-load. The center of the table top (or load surface) is rigidly connected to the velocity meter, and its output is connected to the frequency meter through the vibration meter (Figure 1).
Acceleration test
Moving table
4.1.2 Test method
Vibration meter
Within the frequency range of no-load and full-load, make 5 or more frequencies, adjust the nozzle to the maximum value, and the measured amplitude values ​​of the vibration table under no-load and full-load should meet the specified maximum value.
4.2 Verification method of acceleration waveform distortion 4.2.1 Test conditions
The vibration table is no-load and full-load. The accelerometer is connected to the center of the table, and its output is connected to the distortion tracking instrument through the measuring instrument (see Figure 2).
Acceleration test
Moving table
4.2.2 Test method
GB 5170,15-—85
Tester
Temperature Meter
Wavelet Analyzer
4.2.2.1 Select more than 5 frequencies within the specified frequency range, and the vibration amplitude is the maximum amplitude specified at the corresponding frequency (maximum micro-shift amplitude or maximum velocity amplitude or maximum acceleration amplitude), and measure the maximum velocity waveform loss. 4.2.2.2 In the specified frequency range, use the sweep frequency vibration method to repeatedly find the acceleration waveform with poor The frequency is measured, and its acceleration is distorted. If there is a frequency with distortion exceeding the specified error, the bandwidth of the distortion exceeding the specified error should be measured at the same time. 4.3 Verification method of lateral vibration
4.3.1 Test conditions
The vibration table is unloaded and fully loaded. The three-dimensional accelerometer is rigidly connected at the center of the table and the point farthest from the center of the table, and its output is connected to each input channel of the vibration meter (see Figure 3). Three-dimensional blood velocity meter
Vibration table
4.3.2 Test method
Test method
In the specified frequency range, select 5 frequencies at random, the maximum vibration amplitude in the main vibration direction of the table is the maximum vibration isolation allowed by the corresponding frequency stop vibration table, and measure the vibration amplitude in three directions. 4.3.3 Tank axial vibration ratio is calculated as follows:
where: az
×100%
The vibration amplitude in the main vibration direction of the base 1 is: The horizontal vibration amplitude perpendicular to the main vibration direction and perpendicular to the horizontal vibration direction in the second measurement is: 4.4 Verification method for the uniformity of the vibration amplitude of the table surface (1)
4.4.1 Test conditions
The vibration table is unloaded. At the center of the table and the four installation points farthest from the center (or four installation points are selected on the nearest mounting bolt post), the accelerometers are rigidly connected, and the input of each accelerometer is connected to the input channel of the measuring instrument respectively (see Figure 4). Accelerometer
Vibration table
4.4.2 Test method
GB 5170.15.--85
Within the specified frequency range, evenly select 5 points with the frequency of ", the vibration of the center point of the table as the corresponding frequency to report the maximum amplitude allowed by the table, and measure the amplitude of each point respectively. 4.4.3 The uniformity of the table surface vibration amplitude is calculated as follows:
lAamax!
×100%
The vibration amplitude of the center point of the table in one measurement; the vibration amplitude of each installation point of the table in the same measurement relative to the center The absolute value of the maximum deviation of the vibration amplitude at the center point. 4.5 Verification method of frequency indication error
4.5.1 Test conditions
The output of the vibration table signal generator is connected to the frequency meter (see Figure 5). Vibration table frequency indicationbZxz.net
Vibration table signal generator
Frequency meter
4.5.2 Test method
Within the specified no-load frequency range, evenly select more than 5 frequencies for measurement, record the vibration table frequency and frequency meter indication and calculate its error.
4.6 Verification method of frequency stability
4.6.1 Test conditions (same as 4.5.1).
4.6.2 Test method
Select 2 frequencies within the specified no-load frequency range, each continuously for 4 hours, and record the frequency indication once every 15 minutes. 4.6.3 The frequency stability is calculated as follows:
×100% or △fma
Formula: f——given test frequency indication, Hz. (3)
GB5170.15—85
A/max——the maximum deviation of the frequency indication relative to the given frequency in each measurement, Ilza4.7 Verification method of amplitude indication error
4.7.1 Test conditions
The vibration table is unloaded. The accelerometer is rigidly connected to the center of the table, and its output is connected to the vibration meter (see Figure 6). Accelerometer
Vibration table
4.7.2 Test method
Measurement instrument
According to the amplitude indication of the vibration table
In the specified no-load frequency range, select no less than 3 frequencies, select 5 amplitude values ​​at each frequency and measure them in turn, and record the vibration table amplitude indication and the vibration meter indication. 4.7.3 The amplitude indication error is calculated as follows: ai-ao
Where: o
In the same measurement, the amplitude indication of the vibration meter, in the same measurement, the amplitude indication of the vibration table. Table.8 Verification method of background noise output speed 4.8.1 Test conditions (same as 4.7.1).
4.8.2 Test method
×100%
(4)
Connect the power supply of the vibration table, the hydraulic source and the cooling device are in working state, the hydraulic source is set to the specified working pressure and flow, the output signal of the control device is zero, and the effective value of the table surface noise acceleration is measured. 4.9 Verification method of fixed dial accuracy
4.9.1 Test conditions
The vibration table is unloaded and fully loaded, and the center of the table surface (or the top surface of the load) is rigidly connected to the accelerometer, and its output is connected to the level recorder through the vibration meter (see Figure 7).
Secret camera
Accelerometer
Secret table
4.9.2 Test method
Electrical semi-recorder
The vibration table is unloaded and fully loaded. Within the specified frequency range, at a sweep rate of 1 octave/minute, perform reciprocating sweep frequency vibration with a certain acceleration at the maximum acceleration and minimum acceleration amplitude allowed by the vibration table, and the maximum deviation of the vibration frequency characteristics measured by the electric recorder is the vibration accuracy.
4.10 Verification method for the maximum sound level of radiated noise GB5170.15-5
Vibration combination full load. Within the specified frequency range, perform sweep frequency vibration with the maximum vibration amplitude allowed by the vibration table, and measure and record the maximum sound level with a sound level meter (A-weighted network) at a human height of 1m away from the edge of the vibration combination. 411 Verification method for continuous working time
Vibration table full load. At the upper frequency limit of the maximum displacement amplitude, perform rated vibration with the maximum displacement value, and continue to operate according to the specified continuous working time. The vibration table should work normally.
4.12 Verification method of scanning velocity error
GB5170.15-85
Appendix A
Measurement of low-frequency vibration amplitude and distortion
(reference)
At present, for the test of vibration amplitude and distortion in the frequency range of 0.1~5Hz, the vibration table background noise drowns the acceleration signal, so the conventional test method often produces a large error. It is recommended to use the "frequency conversion method". The low-frequency vibration test system diagram is as follows.
Dare to use
Recorder
Resistance frequency vibration test system
Filter
Voltmeter
GB 5170.1585
Appendix B
Selection of verification items
(reference)
Shaping identification and output of the vibration table! During inspection and periodic checking, if there are no other provisions in the relevant standards, you can select the inspection item number according to the table below
Inspection item name
Vibration rated parameters
a: Rated specification
b. Maximum acceleration amplitude under no load
Maximum acceleration amplitude under full load
d. Maximum speed
Maximum signal value
Speed ​​waveform error
Core vibration
Surface vibration uniformity
Frequency indication error
Frequency stability
Amplitude indication error
Background noise speed
Vibration setting accuracy
Maximum level of noise
Continuous working time
Sweep frequency error
Type inspection
Output inspection
Periodic inspection
Reference clauses
Note: The symbol "" indicates items that must be inspected; the symbol "A" indicates sampling inspection or optional inspection (referring to the items that need to be inspected proposed by any party of the inspection party or the inspection party)
GB5170.15—85
Basic Parameter error requirements
(reference)
When the vibration table is regularly calibrated, the error requirements of basic parameters refer to the following table. Original number
Specification item
Acceleration waveform distortion
Vibration
Amplitude uniformity of table surface vibration
Frequency indication error
Frequency stability
Vibration indication error
Standardization
Frequency rate error
Additional instructions:
Error requirements
Frequency above 10Hz
Not more than 25%
Not more than 25%
Not more than 15%
Less than 5Hz: ±20%
5Hz to 50Hz: ±1Hz
To +50Hz: ± 2%
Less than 5Hz, ±20% every 4h
5Hz to 50Hz, 44h=1Hz
More than 50Hz: ±2% every 4h
±1Hz
This standard is proposed by the Technical Committee for Standardization of Environmental Conditions and Environmental Tests for Electrical and Electrical Products. This standard is drafted by the Working Group for Verification Methods of Basic Parameters of Environmental Test Equipment. The main drafter of this standard is the Ministry of Electric Power and Health. If the error requirements are not met, the values ​​shall be recorded in the record. If the error requirements are not met, the values ​​shall be recorded in the record. If the error requirements are not met, the values ​​shall be recorded in the record.15—85
Basic parameter error requirements
(reference)
When the vibration table is regularly calibrated, the error requirements of the basic parameters shall refer to the following table. Original number
Qualification item
Acceleration waveform distortion
Vibration
Table vibration amplitude uniformity
Frequency indication error
Frequency stability
Vibration indication error
Standardization
Frequency rate error
Additional instructions:
Error requirements
Frequency above 10Hz
Not more than 25%
Not more than 25%
Not more than 15%
Less than 5Hz: ±20%
5Hz to 50Hz: ±1Hz
To +50Hz: ±2%
Less than 5Hz, every 4 h±20%
5Hz to 50Hz, 44h=1Hz
Maximum 50Hz: every 4h±2%
±1 heart road
This standard is proposed by the Technical Committee for Standardization of Environmental Conditions and Environmental Tests for Electrical and Electrical Products. This standard is drafted by the Working Group 1 of the Basic Parameters Verification Methods for Environmental Test Equipment. The main drafter of this standard is the Ministry of Electric Power and Health. If the error requirements are not met, the values ​​shall be recorded in the file. If the error requirements are not met, the values ​​shall be recorded in the file. If the error requirements are not met, the values ​​shall be recorded in the file.15—85
Basic parameter error requirements
(reference)
When the vibration table is regularly calibrated, the error requirements of the basic parameters shall refer to the following table. Original number
Qualification item
Acceleration waveform distortion
Vibration
Table vibration amplitude uniformity
Frequency indication error
Frequency stability
Vibration indication error
Standardization
Frequency rate error
Additional instructions:
Error requirements
Frequency above 10Hz
Not more than 25%
Not more than 25%
Not more than 15%
Less than 5Hz: ±20%
5Hz to 50Hz: ±1Hz
To +50Hz: ±2%
Less than 5Hz, every 4 h±20%
5Hz to 50Hz, 44h=1Hz
Maximum 50Hz: every 4h±2%
±1 heart road
This standard is proposed by the Technical Committee for Standardization of Environmental Conditions and Environmental Tests for Electrical and Electrical Products. This standard is drafted by the Working Group 1 of the Basic Parameters Verification Methods for Environmental Test Equipment. The main drafter of this standard is the Ministry of Electric Power and Health. If the error requirements are not met, the values ​​shall be recorded in the file. If the error requirements are not met, the values ​​shall be recorded in the file. If the error requirements are not met, the values ​​shall be recorded in the file.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.