Some standard content:
JJG 233--1996 Verification Regulation of Piezoelectric Accelerometers Acquisition
JG2331996
Recommendation ITG2331991
JFC:297-1995
This national technical standard was approved on December 23, 1997, and will be implemented from January 1, 2007. Responsible unit: National Technical Committee for Metrology and Testing of Metrology and Testing Centers of China Drafting unit: First Metrology and Testing Institute of China Metrology and Testing Center
The technical provisions of this regulation shall be interpreted by the drafting unit. The main drafters of this regulation
Shang Jinfang (First Metrology and Testing Institute of Hangda Industry Corporation) Xu Gu (China Metrology and Testing Institute)
Yang Xiaowei (First Metrology and Testing Institute of China Metrology and Testing Center) Technical requirements
Verification conditions
Calibration items and verification methods
Verification result processing and verification period
Appendix 2 Format of verification certificate (back side)
Format of verification result notification (back side)
Verification procedure for piezoelectric accelerometers
This procedure is applicable to the verification of newly produced and repaired piezoelectric accelerometers and standard piezoelectric accelerometers (hereinafter referred to as working accelerometers and standard accelerometers). The verification of other linear accelerometers can be carried out according to this procedure.
"Juhu"
Working accelerometers and standard accelerometers are the main components of vibration and shock measurement systems: they use materials as measuring elements, convert acceleration into electrical or magnetic field, and use mechanical motion and shock to test. Standards such as speedometers also use transmission speed standards to compare the dynamic sensors. The second technical requirements are as follows:
The upper and lower rings are filled
1.1 Temperature: (2±5)℃, relative humidity 80%. 1.2 Voltage: 198-.242V, 44.5-51.5H 1.3 The test and its surroundings should be free of strong vibration, strong power, no erosion, no electric field and magnetic interference, light and noise interference. All equipment should be well grounded. 1 Balance performance
2.1 The working accelerometer and the standard accelerometer should be marked with the model, number, vibration or sense force, direction (+) and the direction of the smallest reduction (red dot), and there should be no obvious mechanical cost. 2.2 The installation surface of the accelerometer should be rough, and the drag R of the installation surface and the transmission surface of the standard accelerometer should be optimized. 1.6: The drag R of the installation surface and the transmission surface of the standard accelerometer should be optimized. 0.8um
3.3 The manufacturer of the working accelerometer and the standard accelerometer shall provide its single-element resistance, capacitance, cable capacitance, recommended installation torque, polarity, mass, shell material, installation thread size, external dimensions (given in the diagram) and structural form (given in the literature).
! Working performance
3.1 Reference and specifications
1. The calibration uncertainty of the speed meter is 2%, and the calibration uncertainty of the standard accelerometer is 0.5. 3.2 Dynamic range
The dynamic range of the working accelerometer or standard accelerometer refers to the linear working range of its amplitude response and amplitude response when loaded or unloaded.
3.2.1 Working dynamic range
Manufacturer! The sensitivity change of the working accelerometer shall be 15%:10%. The working frequency range shall be linearly determined by the manufacturer. The working accelerometer shall also have a sensitivity range of 2%. The typical values of the installation vibration rate and the impedance ratio shall be given. 3.2.2 Standard accelerometer dynamic range
3. Within the specified vibration and impact velocity range, the amplitude of the standard accelerometer shall be 3: a. The manufacturer shall provide a working frequency range for the sensitivity change under different load conditions; c. The manufacturer shall provide a typical amplitude range for different load conditions. Frequency response in the high frequency band (frequency greater than 2000H) is corrected at: 1372www.bzxz.net
shan. The manufacturer should avoid only giving the rated vibration and the so-called safety meter, and should give the following conclusions: The accelerometer's sensitivity should be better than 1% in a typical negative or harmonic range of 3.3 years: The sensitivity of the narrow accelerometer should be better than 0.5%, and the sensitivity ratio of the vibration given by the manufacturer should be reported as the maximum sensitivity ratio of the vibration environment. The vibration sensitivity ratio of the accelerometer should not be less than 5%: the horizontal sensitivity ratio of the standard accelerometer should be greater than 2% 3.5 The horizontal sensitivity ratio of the shock model should not be greater than 15% within the range of use, and the standard test accelerometer should not be greater than 5% 3.6 The board characteristics should be manufactured! The typical curve of the relative characteristics can be given, 4 Environmental performance
4.1 Temperature response
The manufacturer should give the typical value of the additional temperature error at the extreme temperature and the extreme temperature: the standard accelerometer gives the capacitance change sensitivity-temperature effect curve, and also gives the typical transient temperature response of the accelerometer and the standard accelerometer.
4.2 Plasticity range
Manufacturer should give the difference limit value, 4.35 and English
Manufacturer should give the relevant data of sound and noise sensitivity, 4.4 Installation torque and base strain sensitivity
Manufacturer should give the typical value of installation rail and base strain sensitivity, three verification conditions
5 Verification instruments and equipment
Specification is full, the technical requirements of instruments and equipment are shown in the table, Table 1
Sub-branch control station
Average electrical
installation position, group
world name
Kaben Wind World
Consulting test acceptance!
Base Note, [0-center
：:00
:1: -41
London fixed device fixed
Age fixed project
Degree and pregnancy card
Jinnian Hong
Installation efficiency
Shunpiaoying shop
Start car, school
Equipment name
Benchmark narrowness
(Fan Duhong)
Mutually is the law car
Layout device
Slow Duty)
Medium frequency protection
【Mountain comparison】
Frequency response automatic
Dynamic measurement to impulse
Meeting station
Medium report dynamic
(Super Durable Method)
High frequency dynamic
Lan Qi installation
(World Law)
shi pregnant hope dynamic benchmark
and standard working device
(ground and installation)
zhongxin dynamic
standard production installation
(chemical according to tunnel?
safety type installation
(light method
happy people operation request
standard car 1 or Hm model 10m
standard spherical meter in the examination bone, add error
2%, full selection
control standard price
dynamic:
call speed delivery let the accuracy 5%
value ticket than the dry through the time standard metallurgical continuous meter
point uncertainty pressure rate 16 efficiency 3 time. For!.s*.
-1U. 1
Only in the above, 2%:
Only in 20001, 3%:
Including effective large port type:
Order more than 2%
Pressure address:
Measurement uncertainty: 0.2%
Figure: 200-50k
High elasticity measured cube length ratio! The group of busy bodies, its frequency is about the exchange of one or standard plus standard, the sampling rate is not more than 1mHz, conversion%m
0015030
--:000H
2(-501)
The verification is directly determined
2%·5%
Avoidance theorem
Operation degree
Use. Point
I move the witness to extract
to see the biggest impact
to see the
wet pipe degree
want to produce control production
correct washing
with the spirit of collection
development, this device
name
step expansion test standard
impact pull fixed
slow time control device
half-increment meter production 4 mouth
same impact is still open in the market learning
according to the dynamic platform
install fast
liquid and weak
mid-intestine, mid-volume equipment
welcome method analysis
test device
pull technology request
J Accuracy>1*10/
Increase the range of
1+-+m?
Large machine with the same heat daily%Inm:
Shock Shenzhen seat: 0Fs
Standard pressure pass band 70.-4c0
Output standard: 0.2
Special seat: 0.25mil
Increase the effect of the heart gate than the movement
Metal fittings, the two quantities of sensitive investment you take 10 data effect (2:=1: guest,
Asia progress, body areaization
Report rate required: 1%~(year: Tong degree 3%
: 13015):
Please: 1251 hours (1L5=; d
2502000H hours, (12)· .
*000Hz(115=6)dm
+pressure test equipment:
measurement range:88;
maximum measurement speed is set to ID:
consumption room is 75n:anti-return:can produce approximately free field alternating current uncertainty of 0.1:sure
accuracy is 2% etc.the minimum measurement speed is%.It can be evenly realized,with 1 as the blood gradually degree [or the ring body blood pressure,within the radius of 20-m with the center of the sphere as the center,do not press at any point ≤%,its adjustment range:5×: (13-511. Building transfer magnetic dirt most heart times 3
inspection fluorescent installation no cost transportation
hospital (-9%)
river forbidden to leave
profit stop air resources
injection power
installation force
spiritual song degree
girl frequency
low double single
■ air heat ratio
6 environmental inspection fragrance
installation reward, only device
section resource name ring
war general source road
test type case theft
real state special sound||tt| |Standard device
Specification limit length
Chinese teaching
Kill push installation factory
Phase pressure measurement
Random model response
Cold glue only attack calculation
Density pulling equipment
Mountain inspection and determination
China and the United States Huai standard technology
Technical requirements
Can be on: Accelerometer (or standard cutting test meter: minimum single transfer public, seat certificate production school T meter: h pass inflammation meter (marked in
: transfer limit 0:
Measurement flow can use this technology between 14.1||tt| |Certification drawing: 05W
Sensor is actual cost location:
Table fullness: small
Flatness:
More current, no table measurement display is set to 1%; instrument compensation range: -10,
Measurement and groove set primer 2%
Month number 435
Maximum moment stiffness uncertainty 15%
Time net 4-3 is required, the sample technology is added to the certification period to determine:
Period: 20·, it is recommended: D·9m not
(letter)
Standard accurate piece counting has been limited!
Test medium: 90
True: oil D.IMI%
High pressure is 4ot
: 40 yuan
Same as No. 8-2
Reduction quantity is less than 0.12
Four verification items and verification methods
Dangerous installation is not
Flood::-9041
According to the original requirements of Article 1 of the current procedure, use a thermometer, hygrometer and multimeter to check the dangerous verification environment, which meets the requirements of Article [of this regulation,
Inspect the appearance and Document inspection: Carry out appearance inspection according to clause 2.1 and clause 2.2 of the regulations, and the verification result shall comply with clause 2.1376 and clause 2.2; Check relevant parameter graphics according to clause 2.3, and the inspection result shall be consistent with the actual object and meet the relevant regulations: 1. For calibration of electrical diagrams, use a high resistance meter to measure the insulation limit between the core wire and shell of the accelerometer (or standard accelerometer) under the specified pressure, which shall comply with the relevant provisions of clause 2.3. 9 Capacitance detection
Use a medium capacitance tester or instrument, and make an accelerometer (standard accelerometer) under -10OHz room current: discharge the cable with the paper cable and subtract the mountain discharge from the combined current. If the acceleration is derived from the customer, the store will introduce the relevant frequency of the product in Section 2.3.
10 Reference sensitivity should be determined
10.1 Verification of reference sensitivity of accelerometer Use a 1-frequency standard device with a length of 43 to compare the actual results: connect the reference accelerometer T with the test standard accelerometer back to back rigidly, install it on the center of the table of the calibration vibration table, and calibrate it under the rated acceleration (or) and test acceleration (or). The ratio of the accelerometer input to the acceleration value it withstands is the reference sensitivity. 10.2 The calibration of the standard blood velocity meter reference setback is carried out with the reference device or the five-phase reciprocity method using card No. 4.1 and 4-2. The laser T-part calibration must be carried out by the laser interference absolute method at zero frequency, and the reference gain of the power distribution device must be considered. The calibration result shall comply with the provisions of clause 3.1. The unit of the current is expressed in m" (or / when necessary): The unit of the current is expressed in mV/us- (or mV/g when necessary): pt--picocoulomb:
--second·
--meter;
9.BM65m/s;
mV--*,
annual stability calibration
the annual stability calibration is based on the annual calibration. Balance: that is, the long-term change of the sensitivity of the commonly used T-type accelerometer (or standard accelerometer) under the same calibration conditions, that is: S/S1×100%
wherein n
and compensation film;
S the scale of the test this year:
S the daily sensitivity of the test last year:
given the method and the reference tube sensitivity, the result shall meet the requirements of Article 3.3: 12 ampere meter vibration frequency and Newton ratio shall be determined
12.1 Continuous scanning reaches
The closed-loop dynamic scanning system given in Table 1, No. 5-1, is used to make the calibrated T-type accelerometer (or standard accelerometer) withstand a constant acceleration during the dynamic scanning process. The curve of change with the point rate is given by recording, and the installation Please note that,
12.2 Impulse method
Use the device given in Table 1, No. 5-2, to install the working accelerometer (or standard accelerometer) on the enterprise, and shield the gold end brick of the product. Figure 1 shows the attenuation waveform: Attenuation coefficient:
Logarithmic decrease:
Yin Ni ratio:
Installation technique
-8/V-8
Use:,. The working frequency of the working accelerometer (standard accelerometer) can be estimated, and the calibration result should meet the factory specifications
13 Amplitude-frequency calibration
13.1 Continuous sweep method
Method is the same as Article 12.1.
13.2 Point-by-point comparison method
Method is vertical sensitivity calibration. First determine the reference frequency from the double-setting L listed in No. 64 in Table 1, then select at least 10 points evenly within the selected frequency range according to the calibration, and use the comparison method to measure the sensitivity under different conditions. The result is given as the percentage deviation of the reference sensitivity. The preferred frequencies are:
20, 40, RO, 160, 315, 630, 1250, 250U, 8K), 1MK00Hx: Reference frequency: 160Hz (first selection 80H2),
Preferred acceleration ：
（10，2），50，100）1n/2 line 10 times efficiency; measurement speed: 100/（second send 10m/g）13.3 Details point pure elimination
method is the same as reference sensitivity to do inspection and determination, use table 1 sequence guide (!-·6-3 output device, in the selected rate range, the logarithmic attenuation of 1378
is about uniform and selects 10 rate points, adopts laser-secretion method or Bayer function method wet point retrograde calibration, and conducts low-frequency calibration, and its optimal frequency is: (.1,.?,0.5,1,2,5,10,20)H
The preferred speed value is: 1H or more, 1-10m; 1H or less, to ensure sufficient noise 13.4 The negative influence depends on the fixed
load response adjustment. The main requirements for the standard accelerometer to be tested are 13.4.1 The requirements for the calibration load adjustment are as follows: The negative influence adjustment block used for calibration should be 1/4, [21, 2.5, etc., which is the same as the standard accelerometer quality. Parts, two transfer surfaces are acoustically ground: 13.4.2 Continuous scanning
Use the closed-loop automatic scanning system given in Table 1 No. 5 [to make the standard velocimeter transfer surface bear a certain degree of loading in the automatic frequency scanning process, and use the instrument to verify that it is standard loading and filtering. The frequency curve with mass ratios of 1/2, 1 and 2 is given, and 13.4.3 The absolute strength of the method is the same as Article 13.1.
Take the sensitivity at the frequency of 16UHz (second choice H) as the reference point, give the percentage deviation, the test results should meet the requirements of Section 3.2.1 or Section 3.2.2: 14.1 Test method
In the specified speed range, select the -1 point (including the maximum and minimum accelerometers), and test the sensitivity of the working accelerometer (or standard accelerometer).
Based on the dynamic range of the industrial accelerometer (or standard accelerometer), use the device of Table 1 No. 7-1 or 7.2, and test it with the wet method or impulse method, and give the resonance regularity of the resonance beam and the test shock concentration and the duration of the shock.
In the small power range, the amplitude linearity vibration test can be carried out according to the requirements, and the test method is the same as the reference speed test.
14.2 Number of samples!
14.2.1 Multiplication method
From the acceleration and sensitivity S, the values determined this time, use the following formula to calculate the return line: S-S+Ka
Intercept: S
Mean acceleration: c
Measured number
Mean sensitivity table: S
-12.3,*..n(n=7 - 14)
will give the regular speed value. By regressing the linear equation (6), we can find out the acceleration, S, which is the linearity formula of the smoke value:
5 100%
7-value linearity,
In the calculation process, the standard sensitivity of the workpiece blood accelerometer (or standard accelerometer) (16Hz or =0Hz) must be substituted into the calculation result, which is, - point, i. Regardless of the minimum: give E7 the final method;
or (2:
Mingren Speed Bao.
(S=S.) × 100g x160%
Sg·sa
That is, the linear change percentage of each g interval, 14.2.2 Fixed-point deviation method
In the case of a large dynamic range, the sensitivity of the test point can be analyzed and the sensitivity percentage deviation table can be used to test the linearity of the amplitude to make sure that the correct sensitivity is used. At this time, the sensitivity and acceleration of the test point should be clearly defined. The test results should meet the requirements of Section 3.2.1 (or 3.2.2). 15 Vibration load The calibration of the large transverse sensitivity ratio is to install the standard accelerometer (or standard accelerometer) in the center of the transverse calibration room, and the sensitivity of the accelerometer (or standard accelerometer) in the calibration room must be multiplied by the direction of the vibration. The test should be done in the direction of 1! 8, and a positive vibration rate of less than 5001[z is applied to make the tested accelerometer (or standard accelerometer) rotate around its own sensitive axis to form a transverse vibration force to the tested accelerometer (or standard accelerometer) The maximum sensitivity value and the minimum lateral sensitivity value of the micro-speed meter (or standard accelerometer) are calculated by the following formula: mx100%
Wherein TSR is the maximum lateral sensitivity ratio: S is the maximum sensitivity value of the axial sensitivity value of the working accelerometer (or standard accelerometer) (or standard accelerometer) S
The result of the test should comply with clauses 3 and 4. 16 Impact maximum horizontal sensitivity test
The tested working speed meter (or standard blood speed) shall be installed on the impact compensation device given in Article 15 as the left side 1. The core tool can make the tested two-speed meter (standard plus track change) rotate with its sensitive track, and the minimum step shall not be 15°
The impact time shall be selected first:
(0.1, 0.2, 0.5.1, 2, 5, 10)s2) According to the requirements of the vibration load calibration, the lateral sensitivity ratio of the calibration workroom will be 15. The standard accelerometer (or standard accelerometer) shall be installed in the center of the lateral calibration room. The sensitivity of the accelerometer (standard accelerometer) in the calibration room must be multiplied by the direction of the movement, and the total length must be 1! No. 8, apply a positive vibration at a rate of less than 5001[z to make the tested working accelerometer (or standard accelerometer) rotate around its own sensitive axis, and the force will be equal to the lateral sensitivity value and the minimum lateral sensitivity value of the tested working accelerometer (or standard accelerometer). The maximum vibration sensitivity should be calculated as: mx100%
where TSR is the maximum lateral sensitivity ratio, S is the maximum sensitivity value of the tested working accelerometer (or standard accelerometer), and the axial sensitivity value S
of the tested working accelerometer (or standard accelerometer) should meet the requirements of Clauses 3 and 4. 16 Impact maximum sensitivity ratio test
The tested working speed meter (or standard blood speed) shall be installed on the impact compensation device given in Article 15 as the method given in the left hand side 1. The core tool can make the tested two-speed meter (standard speed meter) rotate with its sensitive track, the minimum step shall not be 15°
First select the impact time:
(0.1,0.2,0.5.1,2,5,10)s2) According to the requirements of the vibration load calibration, the lateral sensitivity ratio of the calibration workroom will be 15. The standard accelerometer (or standard accelerometer) shall be installed in the center of the lateral calibration room. The sensitivity of the accelerometer (standard accelerometer) in the calibration room must be multiplied by the direction of the movement, and the total length must be 1! No. 8, apply a positive vibration at a rate of less than 5001[z to make the tested working accelerometer (or standard accelerometer) rotate around its own sensitive axis, and the force will be equal to the lateral sensitivity value and the minimum lateral sensitivity value of the tested working accelerometer (or standard accelerometer). The maximum vibration sensitivity should be calculated as: mx100%
where TSR is the maximum lateral sensitivity ratio, S is the maximum sensitivity value of the tested working accelerometer (or standard accelerometer), and the axial sensitivity value S
of the tested working accelerometer (or standard accelerometer) should meet the requirements of Clauses 3 and 4. 16 Impact maximum sensitivity ratio test
The tested working speed meter (or standard blood speed) shall be installed on the impact compensation device given in Article 15 as the method given in the left hand side 1. The core tool can make the tested two-speed meter (standard speed meter) rotate with its sensitive track, the minimum step shall not be 15°
First select the impact time:
(0.1,0.2,0.5.1,2,5,10)s
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