Some standard content:
National Metrology Verification Code of the People's Republic of China. IJG 97—2001
Goniometers
2001-11-30 Issued
2002-03-01 Implementation
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China JJG972001
Verification Regulation Gouiometers
JJG97—2001
Replacement JJG97—1981
Approved by the State Administration of Quality Supervision, Inspection and Quarantine on November 30, 2001, and implemented from March 1, 2002
Responsible unit: National Beihe Kun Angle Meter Committee Drafting unit: Shangyou City Testing Technology Research Institute Drafting unit: Aviation Industry Corporation Third Department Fourth Research Institute This regulation is entrusted to the National Technical Committee for Angle Meters to support the interpretation of this regulation. The main drafter of this regulation:
Yi Yaozong
Dream Drafting person:
Xue Runqiu
JJG 9-2001
(Shanghai Institute of Testing Technology) (Shanghai Institute of Testing Technology)
(The 34th Institute of Aviation Industry Corporation) (Shanghai Institute of Metrology and Measurement) (Shanghai Institute of Metrology and Measurement Technology) 2
Performance requirements·
General technical requirements··
External specifications and the interaction of each part
The location of each part of the optical system
Degree of error
5.1 Inspection piece,
According to the fixed frequency port and verification method
Treatment of inspection results
5.d Inspection cycle
Attached is the verification record and calculation example of micrometer error Attached is the repeatability calculation example to the whole series ratio measurement calculation example
1 Scope
JJG 97—2001
Verification Procedure for Goniometer
This small regulation is also used for the initial verification, subsequent verification and inspection during use of the circular velocity standard.
2 Overview
The goniometer consists of a graduation standard, a measuring system, a limit calibrator, a reading system, and a workbench. It is mainly used to measure the horizontal direction of the target. 3 The design requires the highest performance.
The accuracy levels of the goniometer are divided into 1, 2, 5 and 10 levels. The minimum error of each level, angle measurement accuracy, micrometer error and space resolution are listed in Table 1. Table 1
Accuracy level
General technical requirements
Center position error
Appearance and some related functions
Angle measurement accuracy (=)
Micrometer error
The outer surface of the goniometer should not be bruised, rusted or scratched, and the surface of the optical system should not have defects such as detachment, especially erosion, stains, etc. 4.1.2
Micrometer maintenance
4.1.3 The dial, micrometer, reading microscope and aiming system should not have defects such as broken wires and loose loads. 4.1.4 The three tables should not have punctures. Use a ruler to check the flatness of the workbench surface. No protrusion is allowed.
4.1.5 The movable parts of the goniometer should be moved or rotated in the specified range. The functions of all the locking parts should be effective.
4.1.6 The goniometer should be marked with the manufacturer's name (mark) and factory serial number. 4.2 Relative positions of various parts of the optical system
4.2. The position of the bottom of the optical axis in the telescope (or the standard telescope, the lower part) and the collimator. 4.2.2 The vertical line of the 1-line in the telescope collimator should be parallel to the main rotation axis. 972003
4.2.3 Reading the gauge, the relative position of the scale line image is correct and there is no visible visual eccentricity. 4.3 Dial eccentricity
4.3. "The scale of the dial is a single scale line or image, and the image is left alone. (a or double scale line joint "Figure 1 () 1 and the two ends of the diameter are in line with the image, and the blade is double scale line [as shown! (:) "Do not measure the instrument. When the dial is rotated, the end points of the scale lines on the same scale of the dial should be aligned. For the reference point set on the spot, there should be no visible diameter shift.
4.3.2 The scale of the dial is a single scale line. Line conformity imaging: There are two scale lines in the field of view. The difference between the spacing between the two parallel scale lines of each pair of diameters should be 15\: 5 Control of measuring instruments
Instrument control includes the initial calibration, subsequent calibration and use inspection. 5.1 Calibration parts
5.1.1 Calibration of metrological standards
Given the calibration of metrological standards, which are listed in Table 2,
Morality only accuracy parts
calibration of metrological research instruments
(1) Second-class angle or small angle normal angle: 8 return rights, 9 rain connection [2 first-class 23 also technical description
(3] third-class 21 and recovery
third-class 23 replacement parts
fourth-class 24 blood calibration body
match 12 5.1.2 The main technical indicators of the calibration standard instruments are listed in Table 1. Table 3 Technical specifications of the calibration standard instruments [Degree of depth] 1 Degree of verticality to the bottom center [\
] (\
Uncertainty of angle measurement = 2
5.1.3 Environmental temperature during calibration wwW.bzxz.Net
All surfaces
The environmental temperature during calibration is the half-balanced temperature time requirement as shown in Table 42 Optical observation
To the instrument
Lithium quality level
Circulation accuracy during calibration
20 ±2
2n = 3
20 ± 5 Preliminary verification method G—2003 The change of ambient temperature per hour is measured and the items for the first verification, subsequent verification and in-use inspection of the goniometer are listed in Table 5. Table 5 Verification items Interaction between various parts of the appearance control system Optical system Service parts 1. Micro-device space distance Dial heart Laser measurement Temperature difference measurement First determination: "+" in the table indicates multiple verifications, and "_" indicates that the determination can be made. 5.2.1 Appearance and mutual performance of each part. 5.2.2 Positioning of each part of the optical system. Subsequent verification. Verification in use. The vertical line of the telescope and collimator can be verified by the following method. Place a block on the rotating table of the goniometer, adjust the surface of the measuring table to be parallel to the axis of rotation, adjust the mirror tube to be perpendicular to the axis of rotation, and observe whether the horizontal line of the reflected image is parallel to the horizontal mark of the telescope graticule. If it is parallel, turn the horizontal mark of the graticule 1 to make it parallel. Align the horizontal graticule of the telescope with the vertical line of the collimator 1 to observe whether the vertical line of the collimator 1 is parallel to the vertical mark of the telescope graticule. If it does not work, use the method of rotating the collimator with the aid of light to make the vertical mark parallel to the vertical mark selected by the state: other requirements are verified by observation method. 5.2.3 Micrometer range
The micrometer range is expressed by the difference between the micrometer inward and outward readings on the same scale line. JJG97-20
In order to reduce the influence of alignment and reading errors, first select a scale line of good quality, align the micrometer to the scale in the inward direction, and read the reading value of, then align the micrometer to the scale in the outward direction, and obtain the set value of, and then repeat it 0 times. Calculate 2(aa) according to formula (1) for measuring micro-bursts
5.3.4 Disc centering
5.2.4.1 Liu Shixing's composite images are shown in Figures 1 (a) and 1 (b): Select a reference point in the field of view of the degree disk that should be close to the scale mark, and move the 0 scale mark close to it: and make a distance between the required point on the 0 scale line and the reference point, then slowly rotate the degree disk for one circle, and observe the distance between the endpoints of each scale line and the reference point. There should be no visible change,
5.2.4.2 For the goniometer with a drop angle (), extend the reading line of the dial and fix it at the same time, use the microscope to move the indicator to measure the distance between the two scale marks. Repeat the above measurement at 45", 315 and other 8 positions on the dial in the same way: the difference between the maximum and minimum values of the 8 scale marks should not exceed 13\
5.2.5 The minimum resolution value of the dial corresponding to the measuring range of the microscope should be within the range of 13. The difference is called error and is represented by the symbol
. When the time is right, place the micrometer at the same position on each starting scale line of the dial and align the three readings to obtain the arithmetic mean of 4. Then, move the micrometer to the end and align it to the adjacent scale line of the dial. Take the arithmetic mean of the three readings as the center: the calibration workbench is evenly distributed within the entire range of the dial for at least 8 positions, and calculate the arithmetic mean of each measured value to obtain the value:
s,h, -a
(1= 1, 2, 3,., 8)
( + ++ )
According to formula (2), calculate the e value. The calibration requirements and calculation examples of the micro-instrument are listed in the attached table. 5.2.6 Angle measurement repeatability
The angle measurement repeatability should reflect the changes caused by the axis runout and collimation of the instrument under test, such as the reading. 4
Put the test object in the working state, and the optical table should be directly aligned with the main axis. Place the control body (23 and stable body) on the measuring instrument, and calibrate the geometric center of the body to coincide with the main axis center: the whole working table is aligned with the optical beam, and the deviation is within the specified range.
According to the standard, at the same time, from the micrometer, raise ten numbers, calibrate 3 times, read the same number of "average", according to the number of constant addition, the micrometer is collected as the work surface, and the 3 arithmetic mean of the readings is taken. Use the above method to calibrate each work surface in turn, and get 12 arithmetic means such as %, %, and w. Set them as the previous measurement,
Then, re-calibrate the work, and use this number in the micrometer at the same time, 3 items are marked. The arithmetic mean value of the number of violations is: reverse the temperature according to the degree of decrease, take 3 calibrations, and the arithmetic mean value of the effect is: in accordance with the above and the method of the child calibration, you need to get the 12 arithmetic means, and use this as the data for the measurement. The error of the micro-instrument should not be allowed in the whole measurement process. From the arithmetic mean value of the reading, the center of the measurement should be divided into the adjacent measurement objects: the pre-measurement estimate a-cu
dn- aa = cn.n
eax = rie s.
nm-aa- r'
ai - ae= c
respectively calculate the best way to adjust the maximum value of the formula (): Co.30 ch,2 =
taw.o - rg.y -
cn, - cian.o - d::
road measurement using the system, the formula is: 2r
; r—number. =12.
angle measurement attenuation film detection calculation example" Appendix 5.2.7 small collection of taste
value setting indication value guarantee product Jia by micrometer most people ask interval error and information setting large question to know the true also know: the same below? Partial violation:
For the first-level micrometer, the market is collecting the center to determine the quality, punishment, calibration or qualification, it is necessary to select and correct it: Check the Beijing micrometer 5
FJC97-200
The maximum front interval error and the maximum inter-personal error of the dial J1, and then calculate the F value according to formula (9) [that is, use the method of 5.7.2.1). In the subsequent calibration, the first-class 23-body direct calibration or the 23-body arrangement mutual comparison method calibration can also be used. The secondary calibration should be carried out by separately calibrating the maximum interval error of the micrometer and the maximum inter-personal error of the dial
F=NIf,3
For the second-level price measuring instrument, the first-class 23-body direct calibration can be used (the calibration method is the same as 5.2.7.2) (9
For the 5\number angle measuring instrument, the center can adopt Use a 24-sided prism, and 10\ grade use a four-sided 12-sided prism for direct calibration (calibration method and 5.2.7.2 Class II commercial || tt || 5.2.7.]\ digital goniometer error calibration method 5.2.7.1.1 Micrometer maximum interval error calibration The maximum and minimum errors of the micrometer are evaluated by the maximum and minimum errors of the micrometer line: ! ! ! 5 uniformly distributed intervals are used for calibration within the entire measurement range: For a micrometer with a measuring range of 5, calibrate every 1, and its relative zero position scale error, (=1, 2', 7\, 4', 5\): For a micrometer with a measuring range of 1, calibrate its relative zero position scale error, (=2\: 4, 6, 8, 1\)) Use a belt angle for combined calibration, that is, use a 2 The intervals within the entire range of the micrometer are measured with a constant angle (the number of inspection scale lines). Under the condition of known individual range errors (i.e., 0), the minimum "method" is used to measure the displayed value to obtain the maximum interval error of the micrometer. Take the micrometer with a verification interval of 1 and a measuring range of 5 as an example, m-6, let the scale error of the initial position be, and the scale errors of other inspected points relative to the initial position be \, a, n, 4,, = p-※ Take 6-2=4 constant angles (see Figure 2 for the constant angles), that is, 3, = -1, F. = 2°, -3,, =: 4° (see Table 3 for the technical requirements of constant angles. For the micrometer with a flat inspection interval of 2' and a measurement range of 10°, the measurement and calculation methods are the same except that the corresponding band value is doubled), and follow the instructions shown in Figure 3. In order, use the abandoned scale to measure the constant angle. For each change of the measuring plate, take 3 collimations, and the difference between the arithmetic average of the readings and the nominal value is taken as the measurement value, that is, the first group () is,,
, the first group (2) is ddadds
, the third group (=3\) is, d
, and the fourth group (4') is o.4+di.5
. During calibration, the first group of measurements is taken with angle (1), and the constant angle is placed on the goniometer working table. Adjust the working table so that the two working surfaces of the constant angle are perpendicular to the line of the plane tube and the single telescope angle (or the north axis of the day telescope). Place the measuring instrument near 0'00\, adjust the parallel light calculation and the telescope to collimate a working surface of the constant negative 3. And read the readings in the micrometer: take the arithmetic mean of the 3 times of sighting and readings as · Move the workbench so that the collimator and the telescope are aligned at the normal angle, and take the arithmetic mean of the 3 times of sighting and readings as
Then, adjust the position of the constant angle by the method described above: Place the micrometer at 1\attached certificate so that the collimator and the desired tube are aligned, and select the number of "works" in the micrometer, and take the arithmetic mean of the times of sighting and readings as · Move the workbench so that the collimator and the telescope are aligned at the normal angle as 1 -: and take the arithmetic mean of the times of sighting and readings as ·
The sampling method is similar to the first group measurement, and the first group (with angle 32\), the third group (normal angle 3,) and the fourth group (normal angle 4) are measured respectively, and the values of d+, d, and 4 are obtained respectively.
According to the following, the marking error of each inspected point is obtained: S(p+ di.s+ di.+ da + d: +- tu.: - de. - d.. - dy.a)!Tu. 3
(2p da.s d.+ + da.s e. - dra d., - f,2 - di.)Fa=5
Ta=g(sp+d.+des+d, +d,-da-da-d-d2)Ta = g (4p - ti.s I da.s + ua.s + di. - do.2 - di.a - taa - de.a)fFas-p
The difference between the maximum and minimum values of the scale error of the inspection point (including the zero position) is used as the micrometer measurement error. Use a first-class optical angle gauge for calibration. During calibration, adjust the micrometer and the table so that the table plane is perpendicular to the cross section of the optical gauge. Adjust the collimator to coincide with the telescope line, and then place the optical gauge between the two optical tubes. Use a micrometer to measure the horizontal distance between the two cross vertical lines, which is the micrometer end scale error: The difference between the maximum and minimum values of each scale error is,
JG 97—200L
5..7.1.2. The maximum interval error of the scale (diameter) of the calibration dial is evaluated by the difference between the maximum and minimum values of the errors (or diameter differences, the same below) of the scales on the inner disk. The maximum interval error of the scale is determined by using the closed principle of the graduations and the method of negative arrangement and comparison. u) Use 8, 9-sided polyhedron as the constant angle (that is, the constant angle 3602/8=45°, 360°/9-40°): For the 8-sided prism (with 45°), 9 groups of arrangement and comparison measurements should be made from the starting positions of 0°, 5°, 10°, and 40° on the dial, and the measurement sequence of each group and the starting position of the dial are shown in Table 6. For the 9-sided polyhedron (with 45°), 8 groups of arrangement and comparison measurements should be made from the starting positions of 0°, 5°, 10°, and 35° on the dial, and the measurement sequence of each group and the starting position of the dial are shown in Table 7.
45° (8-sided stable body)
Arrange the order of Zhuobi items
Group 1
Group 2
Group 3
Group 4
6th ancestor
7th sister
Multiple groups
40 (9 bodies)
Non-rank Feibi genus order
4th red
5th group
6th line
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