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JJF 1560-2016: Calibration Specification for Multi-component Force Transducer
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Calibration Specification for Multi-component Force Transducer
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JJF 1560-2016
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Basic data | Standard ID | JJF 1560-2016 (JJF1560-2016) | | Description (Translated English) | Calibration Specification for Multi-component Force Transducer | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A53 | | Classification of International Standard | 17.100 | | Word Count Estimation | 22,263 | | Date of Issue | 2016-06-27 | | Date of Implementation | 2016-09-27 | | Quoted Standard | JJG 391-2009; JJG 632-1989; JJF 1011-2006; JJF 20-2012 | | Regulation (derived from) | Notice of the General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China 2016 No.16 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard is applicable to static calibration of piezoelectric and strain type multi-component force sensors. | JJF 1560-2016: Calibration Specification for Multi-component Force Transducer---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.
Calibration Specification for Multi-component Force Transducer
National Metrological Technical Code of the People's Republic of China
Multi - component force sensor calibration specification
2016-06-27 released
2016-09-27 implementation
State Administration of Quality Supervision, Inspection and Quarantine issued
Multi - component force sensor calibration specification
Unit. National force hardness measurement technology committee
The main drafting unit. Beijing Aerospace Metrology and Testing Technology Research Institute
Beijing Great Wall Metrology and Testing Technology Research Institute
Shanghai Institute of Precision Metrology and Testing
China Institute of Metrology
Participated in the drafting unit. Shaanxi Institute of Metrology
Tianjin Institute of Metrology and Supervision
This specification entrusts the National Strength Hardness Metrology Technical Committee to explain
The main drafters of this specification.
Mei Hongwei (Beijing Aerospace Metrology and Testing Technology Institute)
Gao Bingtao (Beijing Aerospace Metrology and Testing Technology Institute)
Liu Yonglu (Beijing Great Wall Metrology and Testing Technology Research Institute)
Luo Xiao-ping (Shanghai Institute of Precision Metrology and Testing)
Meng Feng (China Institute of Metrology)
Participate in the drafters.
Zhang Chongwu (Shaanxi Institute of Metrology)
Wang Peng (Tianjin Metrology Supervision and Research Institute of Science and Technology)
table of Contents
Introduction (II)
1 Scope (1)
2 References (1)
3 terms and units of measurement (1)
3.1 Single component calibration (1)
3.2 Multi-component calibration (1)
3.3 Coupling error (1)
4 Overview (1)
5 Metering characteristics (1)
6 Calibration conditions (2)
6.1 Environmental conditions (2)
6.2 Equipment for calibration (2)
7 Calibration items and calibration methods (3)
7.1 Preparation before calibration (3)
7.2 Zero output (3)
7.3 back to zero (4)
7.4 Rated output (4)
7.5 Output Sensitivity (4)
7.6 Repeatability (5)
7.7 hysteresis (5)
7.8 Straightness (5)
7.9 Coupling error (5)
8 Calibration results (7)
9 re-school time interval (7)
Appendix A Multi-component Force Sensor Calibration Record (8)
Appendix B Measurement of Uncertainty in Measurement of Sensitivity Calibration Results (11)
Appendix C Evaluation of Uncertainty in Measurement of Coupling Errors in Output Sensitivity for Two-Component Combination Calibration (14)
Introduction
This specification is based on the rules set forth in JJF 1071-2010 "Rules for the Preparation of National Metrological Calibration Standards".
The calibration standard in the development process reference JJF (military) 20-2012 "multi-component dynamometer calibration specification"
JJG391-2009 "Force Sensors" JJG632-1989 Terms, symbols and definitions in "Dynamic Force Sensors"
And related technical requirements. This specification gives calibration conditions for calibration of multistage force sensors, calibration items
And calibration methods.
This specification is the first release.
Multi - component force sensor calibration specification
1 Scope
This specification applies to static calibration of piezo-type and strain-type multi-component force sensors.
2 reference file
This specification refers to the following technical documents.
JJG391-2009 force sensor
Dynamic Force Sensors JJG632-1989
Force and hardness measurement terms and definitions
JJF (military) 20-2012 multi - component dynamometer calibration specification
For dated references, only the dated edition applies to this specification; references that are not dated
, The latest version (including all modifications) applies to this specification.
3 terms and units of measurement
3.1 single component calibration calibrationofacomponent
A process of calibrating a component of a multi-component force sensor individually.
3.2 multi-component calibration calibrationofmulti-component
A process of applying a load to two or more components of a multi-component force sensor.
3.3 coupling error couplingerror
When a component load is applied to the sensor, the change in the load of the other component load caused by the other component is rated negative
The ratio of the output under the charge.
4 Overview
The multi-component force sensor refers to a force that can simultaneously measure at least two of the six generalized force components of the force vector
sensor.
5 measurement characteristics
Multi-component force sensor measurement characteristics in Table 1.
Table 1 Metrological characteristics
No. metering attribute name
1 zero output
2 back to zero difference
3 rated output
Table 1 (continued)
No. metering attribute name
4 Output sensitivity
5 repeatability
6 lag
7 Straightness
8 coupling error
6 calibration conditions
6.1 Environmental conditions
Ambient temperature. 15 ℃ ~ 25 ℃
Relative humidity. ≤ 80%
Other conditions. Calibration should not have interference sources that affect the calibration results.
6.2 Equipment for calibration
The equipment used for calibration shall be calibrated (or calibrated) by the measuring technology body to meet the calibration requirements and shall be valid
During the period, the range should be covered by the calibrated multi-component force sensor measurement range.
6.2.1 Multi-component force sensor calibration device
The measurement uncertainty of the component complex value is less than the uncertainty of the corresponding component of the calibrated multi-component force sensor
The degree of 1/3.
6.2.2 Force standard machine
The uncertainty of the force value is less than 1/3 of the uncertainty of the corresponding measure of the multi-component force sensor.
6.2.3 Torque standard device
The torque uncertainty is less than 1/3 of the uncertainty of the corresponding measure of the multi-component force sensor.
6.2.4 energize the power supply
Multi-component force sensor calibration used in the excitation power supply output voltage 4h stability, should not exceed the multi-component force
1/5 of the corresponding accuracy of the sensor.
6.2.5 Indicator
Multi-component force sensor calibration instructions used in the instrument (including the multi-component force sensor to provide the excitation voltage
Indicating the instrument) the accuracy of the relevant indicators, in principle, should not exceed the school multi-component force sensor corresponding accuracy indicators
6.2.6 Charge amplifier
The maximum allowable error of the relevant technical indicators shall not exceed the corresponding accuracy index of the multi-component force sensor
6.2.7 Data acquisition system
The data acquisition system shall have a multi-channel synchronous sampling function whose number of channels shall not be less than that of the multi-component force sensor and
The sum of the number of data output channels of the calibration device. The sampling frequency of the data acquisition system should be no less than that of the multi-component force sensor
When the output signal frequency of 20 times.
6.2.8 special fixture
The relative measurement of the effective length between the individual loading positions of the special fixture and the force point of the multi-component force sensor itself is not
The degree of determination should be less than 0.05% (k = 2).
7 Calibration items and calibration methods
7.1 Preparation before calibration
7.1.1 Determine the calibration items
The calibration items can be selected according to the intended use of the multi-component force sensor, and the deviation from the calibration specification should
In the calibration certificate.
7.1.2 Place time
The sensor should be placed under the specified environmental conditions for a sufficient period of time, the recommended placement time of not less than 8h.
7.1.3 Installation and loading conditions
In accordance with the requirements of the instructions, the special fixture and multi-component force sensor installed correctly.
When the load should ensure that the multi-component force sensor axis and the load axis coincide, so that the tilt load and eccentric negative
The effect of the Dutch is minimized.
7.1.4 Connection and preheating
Before the calibration must be in accordance with the correct wiring method will be multi-component force sensor connected to the instrument, the excitation power
Etc., adjust the excitation power, adjust the output voltage to the multi-component force sensor specified excitation voltage, and
Preheating. The warm-up time should be in accordance with the requirements of the instructions.
Note. The manual does not specify the warm-up time, the multi-component force sensor, indicating the instrument, the excitation power and other general preheat 0.5h ~
1h.
7.1.5 Preload
According to the multi-component force sensor manual and other information to confirm the calibration component and the measurement range of each component.
Preload is applied before each component is calibrated, and the hold time is typically 30 s.
7.1.6 Calibration range and calibration point selection
The calibration range of each component is generally zero load to rated load, or according to user needs to determine the calibration of each component
Point generally less than 5 points (including zero load point), generally take the rated load of 0%, 10%, 20%, 50%
100%, or according to user needs to determine.
7.2 Zero output
7.2.1 Preload is carried out in accordance with 7.1.5 and the zero load output value after the last preload unloading is read.
7.2.2 The zero output of each component is calculated according to equation (1).
Zi =
θZi
θni ×
100% (1)
Where.
Zi --- zero output of i-th component,% FS;
i --- component number;
θZi --- apply the i-th component after the last preload of the corresponding component under zero load readings, mV, V;
θni --- i The average weight of the output under rated load, mV, V.
7.3 back to zero difference
7.3.1 Preloading in accordance with 7.1.5, reading the zero load of the indicator before and after the last preload
Out of value.
7.3.2 The zero return of each component is calculated according to formula (2).
Zri =
θZi-θ'Zi
θni ×
100% (2)
Where.
Zri --- the i component of the zero back,% FS;
θ'Zi - apply the i-th component to the last preload before the corresponding component under zero load, mV, V.
7.4 Rated output
7.4.1 Determine the amount of calibration, adjust the indicator parameters as needed, and read the zero load output.
7.4.2 Three preloads are applied continuously, after each unloading, check the indicator back to zero, readjust and record the zero load
Output value.
7.4.3 Apply the load to the calibration points in increments of load until the rated load. Calibrate at each level
After the charge reaches, keep a certain time, keep the time generally take 30s.
7.4.4 After the rated load is reached, the load is unloaded in descending order of load until zero load. At the time of calibration, the load is reached at each level
After that, keep a certain time, keep the time generally take 30s. After returning to zero load, keep it for 30s, read and adjust
Indicator zero.
7.4.5 Repeat 7.4.3 ~ 7.4.4 three times.
7.4.6 Determine the next calibrated component, calibrate at 7.4.2 to 7.4.5 until all components have been calibrated.
7.4.7 The rated output of each component is calculated according to equation (3).
θni = θsi - θZi (3)
Where.
θsi --- i-th component calibration, the average load under the rated load, mV, V;
θZi --- i-th component calibration, the average of the zero-load readings, mV, V.
7.5 Output Sensitivity
7.5.1 Synchronization with the calibration of 7.4.
7.5.2 For strain gauges, the output sensitivity of each component under rated load is calculated according to equation (4)
Calculation.
Sri =
θni
Vi
(4)
Where.
Sri - the sensitivity of the i - th component under rated load, mV/V;
Vi --- the i-th component calibration test measured at the beginning of the excitation voltage, V.
7.5.3 For piezo-type force sensors, the output sensitivity of each component under rated load is calculated according to equation (5)
Calculation.
Sqi =
Vni Gi · Di
Fni
(5)
Where.
Sqi --- charge sensitivity at rated load under i-th component calibration, pC/N;
Vni - the i-th component is calibrated at the rated output under rated load, V;
Gi - the i-th component is calibrated by the charge amplifier set by the attenuation block reading, N/V or Nm/V;
Di - the i-th component is calibrated when the charge amplifier is set to the normalized reading, pC/N;
Fni --- rated load of the i-th component, N or Nm.
7.6 Repeatability
7.6.1 Synchronization with the calibration of 7.4.
7.6.2 Repetition of each component is calculated according to equation (6).
Ri =
ΔθRi
θni ×
100% (6)
Where.
Ri --- repeat of the i-th component,% FS;
ΔθRi --- the i-th component in the process of repeated calibration of the load point of the output of the difference, mV, V.
7.7 lag
7.7.1 Synchronization with the calibration of 7.4.
7.7.2 The hysteresis of each component is calculated according to equation (7).
Hi =
ΔθHi
θni ×
100% (7)
Where.
Hi --- the i component of the lag,% FS;
ΔθHi --- the maximum value of the deviation calibration curve of the i-th component and the deviation of the process calibration curve, mV, V.
7.8 Straightness
7.8.1 is synchronized with the calibration of 7.4.
7.8.2 The straightness of each component is calculated according to formula (8).
Li =
ΔθLi
θni ×
100% (8)
Where.
Li --- the straightness of the i-th component,% FS;
ΔθLi --- the i-th component of the process of the average calibration curve and the average endpoint of the maximum deviation, mV, V.
7.9 coupling error
7.9.1 Determine the combination scenario
7.9.1.1 The component combinations of the multi-component force sensors are shown in Table 2.
Table 2 Component composition of multi-component force sensor
Main component
Influence component
Fx Fy Fz Mx My Mz
Fx -
Fy -
Fz -
Mx -
My -
Mz -
Note.
1 in the table "" means that the combination can be achieved, "-" means that the combination can not be achieved;
2 main component refers to the calibration process in the arbitrary selection of a component, according to certain principles (such as user requirements or vulnerable to other components
Affect) Select another or several components to load as an impact volume to calibrate the effect of the influence on the selected principal component.
7.9.1.2 Select the component to be calibrated and select all or part of the combined test according to the user's requirements.
7.9.1.3 Select the primary load and the zero load point of the affected component as the first calibration point, or apply one as needed
After the preload is set, the indicator is cleared as a zero load calibration point.
7.9.1.4 For each combination, the load point can be selected within the range of the principal component as needed.
Component measurement range according to user needs to select the load point for combination test.
7.9.1.5 When performing two-component combination calibration, the remaining components are separately added under the principal component loading conditions
Charge, respectively, to calibrate the coupling of these components to the principal component of the error.
7.9.2 Calibration procedure
7.9.2.1 Apply the maximum value of the selected component load on the multi-component force sensor and then unload the zero load,
Apply the preload process 3 times.
7.9.2.2 Record the value of each component under zero load.
7.9.2.3 In accordance with the selected calibration scheme, first apply a primary component, at the first level load (including the zero load point) plus
After that, read the output value of each component.
7.9.2.4 Each load (including zero load point) of each influence component is gradually applied, and the load
The output value of each component of the component force sensor, until the maximum load after the removal of the impact of components, read the output value of each component.
7.9.2.5 Apply the subordinate load of the main component, read the output value of each component, and then the impact component according to 7.9.2.4
Of the combined test.
7.9.2.6 Apply the other load points selected by the main component in sequence, subject to the provisions of 7.9.2.5 for the main component of other negative
The combination test of the load points until the selected principal component of the load point combination test is completed, the load of all components are
Unloaded to zero load, read the output of each component.
7.9.2.7 Other selected principal component combinations shall be tested in accordance with 7.9.2.2 to 7.9.2.6.
7.9.3 Calculate the calibration results
The coupling error of each component is calculated according to equation (9).
CSij =
ΔθCij
θni ×
100% (9)
Where.
CSij --- affect the component j on the main component of the output sensitivity of the impact of% FS;
ΔθCij - the average value of the process when the individual load points (including the zero load point) of the principal component i are applied separately
When the application of the load component j after the load after the main component of the corresponding load point of the output process of the average value of the show
The maximum value of the difference, mV, V, N, Nm.
8 Calibration results are expressed
The calibration results should be reflected in the calibration certificate or calibration report. The calibration certificate or report shall include at least the following information.
a) title, "calibration certificate";
b) laboratory name and address;
c) where the calibration is made (if the address is different from the laboratory);
d) the identity of the certificate or report (such as number), the identity of each page and the total number of pages;
e) the name and address of the sending school unit;
f) the description and clear identification of the school object;
g) The date of calibration, if relevant to the validity and application of the calibration results, shall indicate the
Date
h) If the results of the calibration results are relevant and the application is concerned, the sampling procedure of the school sample should be described;
i) the identification of the technical specifications on which the calibration is based, including the name and code;
j) the traceability and validity of the measurement standards used for this calibration;
k) description of the calibration environment;
l) Calibration results and their measurement uncertainty;
m) a description of the deviation from the calibration specification;
n) the signature, title or equivalent mark of the certificate or calibration report issuer, and the date of issue;
o) The calibration result is only a statement that is valid for the school object;
p) No part of the reproduction of a certificate or a statement of the report without the written approval of the laboratory.
The calibrated multi-component force sensor sends a calibration certificate or calibration report with a calibration seal.
9 re-school time interval
As the length of the resumption of the time interval is the use of the instrument, the user, the quality of the instrument itself and other factors
Decision, therefore, school units can be based on the actual use of the decision to re-school time interval, re-school time interval to build
For one year.
Appendix A
Multi - component force sensor calibration record
Entrusted by. Address.
Product Name. Model, Specification. Number.
Manufacturer. Temperature. ℃ Relative Humidity.%
Calibration basis. JJF 1560-2016 "multi-component force sensor calibration specification"
Table A.1 Single component calibration records
load
Direction indicator readings
Process backhaul
1 2 3 level
1 2 3 level
Linear
error
measuring
uncertainty
(k = 2)
Back to zero
Back to zero difference
Measuring range
Calibration Standard. Model. Number. Valid.
Calibration. Verification. Calibration Date.
Table A.2 Multi-component combination calibration records
Calibration Standard. Model. Number. Valid.
Main component
The coupling effect on the principal component
Influence quantity load principal component output influence quantity output
correct
Coupling error
Back to zero difference
Table A.3 Calibration Certificate Inner Page Format
Calibration component
Measurement point indication mean value indication repeatability delay linearity error
Measuring range
Back to zero difference
Coupling error Fx Fy Fz Mx My Mz
Fx -
Fy -
Fz -
Mx -
My -
Mz -
Appendix B
Evaluation of Uncertainty in Measurement of Output Sensitivity Calibration Results
B.1 Measurement model
The output sensitivity is calculated according to the formula (B.1).
Sri =
θni
Vi
(B.1)
Where.
Sri - Multi - component force sensor The i - th component is individually calibrated with the output sensitivity at rated load, mV/V;
θni --- multi-component force sensor i-th component independent calibration under the rated load of the average output, mV;
Vi - the average value of the excitation voltage when the i-th component of the multi-component force sensor is individually calibrated.
B.2 Sensitivity Coefficient
According to the uncertainty propagation law, Sri's synthetic standard uncertainty is calculated according to the formula (B.2).
uc (Sri) = c2 (θni) × u2 (θni) c2 (Vi) × u2 (Vi) (B.2)
The sensitivity coefficient is calculated according to the formula (B.3) and (B.4).
c (θni) =
Vi
(B.3)
c (Vi) = -
θni
Vi2
(B.4)
B.3 Uncertainty Source Analysis
The source of B.3.1 u (θni) is as follows.
a) the measurement uncertainty introduced by the repeatability of the indication u1;
b) measurement uncertainty introduced by the force standard device u2;
c) indicates the measurement uncertainty u3 of the ...
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