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Method and device for measuring intersection degrees of precision centrifugal machine

A precision centrifuge and measuring device technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of only reaching the test end from the intersection of the main shaft and the horizontal axis, limitations, and no intersection test method, etc., to achieve small errors, Easy operation and high measurement accuracy

Inactive Publication Date: 2013-08-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The centrifuge is a large-scale test equipment, and one end of the horizontal axis is the environment end. The line of sight of the theodolite cannot lead from the test end to the environment end. The light can only reach the test end from the intersection of the main shaft and the horizontal axis. The method will be limited here; in addition, the intersection test method is not introduced in the national military standard GJB1801-93 "Inertial Technology Test Equipment Test Method"

Method used

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  • Method and device for measuring intersection degrees of precision centrifugal machine
  • Method and device for measuring intersection degrees of precision centrifugal machine
  • Method and device for measuring intersection degrees of precision centrifugal machine

Examples

Experimental program
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Embodiment 1

[0031] Example 1: Combining Figure 1-4 , a precision centrifuge intersection measuring device, including a precision centrifuge and theodolite, the device also includes a cylindrical sleeve and two cross targets, the two ends of the sleeve are fixedly connected to the two cross targets, the entire sleeve It is fixed on the axis of the horizontal shaft of the precision centrifuge and rotates with the horizontal shaft. The horizontal axis is drawn out from the cross targets at both ends of the sleeve. When the horizontal shaft is rotated, the sleeve drives the two targets to rotate. The track of the cross point of the target is A circle, use the theodolite to observe the horizontal or vertical angle of the target. The center of the circle is on the horizontal axis. Two targets can lead to two points on the axis. The line connecting the two points determines the horizontal axis. The axis of the main shaft of the precision centrifuge Install a filament A at the end, adjust the fi...

Embodiment 2

[0051] combine Figure 2-4 ,

[0052] 1. Detection of the intersection degree of the spindle axis and the horizontal axis:

[0053] The test instruments used are: theodolite and fixture, 2 cross targets, filament and fixture, tape measure.

[0054] The specific test steps are:

[0055] 1) Adjust the spindle axis so that the verticality of the spindle axis is not greater than 1".

[0056] 2) Install a filament A at the shaft end of the spindle, install a theodolite at the same height as the filament A and make it firmly connected to the foundation, rotate the spindle, observe the change of the horizontal angle of the filament A, and adjust the position of the filament accordingly , so that the filament A is located on the spindle axis, that is, when the spindle is rotated, the filament A should hardly move in the field of view of the theodolite.

[0057] 3) Install and fix a sleeve with two "cross" targets on the horizontal axis, lower the height of the theodolite to the sa...

Embodiment 3

[0094] The degree of intersection of the precision centrifuge was measured:

[0095] (1) The degree of intersection between the horizontal axis and the azimuth axis

[0096] Table 1 Theodolite measures the intersection degree of the horizontal axis and the azimuth axis

[0097]

[0098] The distance between the theodolite and the filament is 1520mm

[0099] The degree of intersection between the horizontal axis and the azimuth axis is:

[0100] 1 2 × 1520 × tan 12.5 ′ ′ = 0.046 mm

[0101] (2) The degree of intersection between the axis of the horizontal axis and the axis of the main axis

[0102] Table 2 Theodolite measures the degree of intersection of the horizontal axis and the axis of the main axis

[0103] horizontal axis position Horizontal angle of target A Horizontal angle ...

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Abstract

The invention provides a method and a device for measuring intersection degrees of a precision centrifugal machine. The device comprises a cylindrical sleeve, two cross targets, the precision centrifugal machine and a transit instrument. The two cross targets are respectively fixedly connected to two ends of the sleeve, the integral sleeve is fixedly connected onto a horizontal axis of the precision centrifugal machine, the distance from the transit instrument to the centrifugal machine is adjustable, horizontal angles of the targets and a horizontal angle of a fine wire can be read via the transit instrument, the transit instrument is matched with the targets to lead out a certain point on a main axis, the horizontal axis is led out by the two targets, a certain point on an azimuth axis is led out, and the intersection degrees of the axes of the centrifugal machine are finally determined. The method for measuring the intersection degrees of the precision centrifugal machine includes testing errors of the intersection degrees of the horizontal axis, the main axis and the azimuth axis. The method and the device have the advantages of high measurement precision, small errors and simplicity and convenience in operation.

Description

technical field [0001] The invention relates to a test method of a centrifuge, in particular to a method and a device for measuring the intersection degree of a precision centrifuge. Background technique [0002] Calibrating the accelerometer with only the acceleration of gravity as the input obviously cannot meet the requirements of inertial navigation. The gravity field test of the accelerometer can only measure the acceleration within ±1g (g is the acceleration of gravity). In the inertial navigation system, the flight acceleration of the projectile is greater than 1g or even dozens of g. Therefore, it is necessary to produce a standard acceleration greater than 1g to detect the static characteristics of the accelerometer. The most effective device for generating large accelerations is the precision centrifuge. The precision centrifuge is a testing device for calibrating the output performance of the accelerometer under high overload conditions, including the nonlineari...

Claims

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Application Information

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IPC IPC(8): G01B21/02
Inventor 任顺清王世明曾鸣于志伟
Owner HARBIN INST OF TECH