Displacement sensor structure and testing method

A technology of displacement sensor and testing method, applied in the direction of instruments, measuring devices, mechanical measuring devices, etc., can solve the problems of high price, fast impact speed, large measurement error, etc., to achieve convenient installation and use, solve measurement errors, and eliminate installation errors. Effect

Active Publication Date: 2018-12-28
BEIJING ZHENXING METROLOGY & TEST INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, for the measurement of the gap value between relatively high-speed shearing moving parts, non-contact displacement sensors such as optical, capacitive, and eddy current are used for measurement, and are carried out in harsh environments such as high temperature, high speed, radiation, and dust. High-speed changing gap measurement (especially the minimum gap extreme value), because the gap measurement is a high dynamic measurement, limited by the sampling frequency and sensor dynamic characteristics, it is not only difficult to measure the minimum gap extreme value, but also expensive, difficult to install and debug; Using the displacement sens

Method used

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  • Displacement sensor structure and testing method
  • Displacement sensor structure and testing method

Examples

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Example Embodiment

[0027] Example 1

[0028] See Figure 1-3 , This embodiment provides a displacement sensor structure, including:

[0029] The displacement sensor 103 is composed of a head and a circular shaft. The head is in the shape of an isometric structure and is placed between the fixed part 101 and the moving part 102. The circular shaft is fixed on the fixed part by a mounting seat 104, and Pass through the measuring nozzle 105 installed in the mounting seat 104 at one end, and lock it with a locking headgear 109;

[0030] The locking ring 110 is used in conjunction with the other end of the measuring nozzle 105 to lock the circular shaft of the shift sensor 103;

[0031] The spring 106 placed between the measuring nozzle 105 and the locking headgear 109 is used to apply a force away from the moving part 102 to the sensor shaft, so that the displacement sensor 103 can be reset;

[0032] Spiral micrometer mechanism, apply thrust to the isometric subtractive displacement sensor 103 by locking th...

Example Embodiment

[0044] Example 2

[0045] This embodiment provides a method for testing a displacement sensor structure, which includes the following steps:

[0046] S101, the locking ring 110 does not lock the displacement sensor 103 first, so that the rotating screw micrometer mechanism 108 can control the head of the displacement sensor 103 to move along the axial direction of the circular axis;

[0047] S102, using a calibration block as a zero point reference, so that the head of the displacement sensor 103 just does not expose the fixed part, and record the position displayed by the spiral micrometer 108 at this time, which is recorded as the zero point position L1 of the gap;

[0048] S103: Remove the calibration block, control the screw micrometer mechanism 108 to move the head of the displacement sensor 103 until the moving part can cut the head, and record the position displayed by the screw micrometer mechanism 108 at this time, which is recorded as position L2 , The cold gap is L2-L1, and...

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Abstract

The invention provides a displacement sensor structure and a testing method, and the head shape of the displacement sensor is a step, or a rack, or an array object with equally arranged height. In a measuring process, only the step or the rack with too high head will be broken down, a gap indicated value is equal to a known height of the broken step or rack, and the indicated value has no connection with which position of the step or the rack is broken. According to the displacement sensor structure and the testing method, a measurement error caused by the fact that a cutting position and a broken position are different in existing displacement measurements is solved, and it is needless to install repeatedly so that a part of installation errors is eliminated and installation and usage areconvenient. The structure is convenient to be installed and debugged through a structural design, and the sensor structure is flexible and stretchable when debugging. The sensor structure is locked to ensure sealing, which ensures that a gap value d between high-speed relative shear moving parts is measured in severe environments such as high temperature, high speed, radiation and dust and the like, so as to improve uncertainty of a measurement and contributions are made for calibration of engine apex moving gap and high speed railway moving gap.

Description

technical field [0001] The invention belongs to the technical field of length measurement and relates to a displacement sensor structure, which is used for measuring the gap value between relatively high-speed shearing moving parts. Background technique [0002] The shear motion clearance value involved in the present invention is commonly found in the clearance value between the blade tip of a turbofan engine and the casing, the clearance value between a high-speed railway locomotive component and a guide rail, and the like. Usually, for the measurement of the gap value between relatively high-speed shearing moving parts, non-contact displacement sensors such as optical, capacitive, and eddy current are used for measurement, and are carried out in harsh environments such as high temperature, high speed, radiation, and dust. High-speed changing gap measurement (especially the minimum gap extreme value), because the gap measurement is a high dynamic measurement, limited by th...

Claims

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Application Information

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IPC IPC(8): G01B5/02
CPCG01B5/02
Inventor 张毅杨水旺童京华
Owner BEIJING ZHENXING METROLOGY & TEST INST
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