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An eddy current sensor machine tool online calibration device and method

An eddy current sensor and calibration device technology, which is applied to metal processing machinery parts, metal processing equipment, measuring/indicating equipment, etc., can solve the problems of complex structure and high precision requirements of parts, achieve simple installation and operation, and improve fitting degree, the effect of simple structure

Active Publication Date: 2021-06-22
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In view of the complex structure of the existing eddy current sensor calibration device, the high precision requirements for some parts of the calibration device, and the specific requirements for the shape of the measured conductor; On-line calibration device for eddy current sensor machine tool

Method used

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  • An eddy current sensor machine tool online calibration device and method
  • An eddy current sensor machine tool online calibration device and method
  • An eddy current sensor machine tool online calibration device and method

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0032] Taking the current-type eddy current sensor as an example, the process of the forward stroke is mainly explained, and the process of the reverse stroke is the same as that of the forward stroke.

[0033] Such as figure 1, the invention discloses an eddy current sensor machine tool online calibration device installed on a machine tool, comprising an eddy current sensor 4, a sensor fixing device installed on a machine tool workbench 1 and a measured conductor fixing device installed on a machine tool spindle.

[0034] The sensor fixing device is composed of a machine tool table 1, a sensor bracket 2, a compression bolt 3, and a sensor probe fixing nut 5; the sensor bracket 2 is fixed on the machine tool table 1 through the compression bolt 3, and the eddy current sensor 4 is fixed through the sensor probe fixing nut 5 is fixed on the senso...

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Abstract

The invention discloses an eddy current sensor machine tool online calibration device and method, which include a sensor fixing device and a measured conductor fixing device. In the sensor fixing device, the sensor bracket is fixed on the machine tool table by pressing bolts, and the probe of the eddy current sensor is fixed on the sensor bracket by the sensor probe fixing nut. The connecting column in the fixture of the tested conductor is clamped by the elastic collet in the tool handle, the spring clamp is fixed on the connecting column through nuts and bolts, and the measured conductor is clamped by the spring clamp. Use the CNC machine tool to control the measured conductor to stay away from or close to the eddy current sensor probe. The positive and negative strokes are performed once each time. Every time the machine tool moves Δx, a set of nine point data is measured; for a set of data, the quadratic bilinear interpolation method is used. The current value at the center position is obtained; the nonlinear section and the linear section of the eddy current sensor are segmented, and the relationship between the displacement and the center current value is obtained by using the least square method for the linear section. The invention has the advantages of simple structure, convenient operation and small error.

Description

technical field [0001] The invention belongs to the field of instruments and measurements, and in particular relates to an eddy current sensor machine tool online calibration device and method. [0002] technical background [0003] The eddy current sensor is based on the eddy current effect. Due to its good reliability, high sensitivity, strong anti-interference ability, non-contact measurement, fast response speed, and no influence from oil, water and other media, it is widely used in online monitoring and monitoring of the state of CNC machine tools. Troubleshooting. The eddy current sensor itself has nonlinear error, and the measurement accuracy will decrease after a long time of use. In addition, the type and shape of the metal to be tested will also affect the measurement results, so the eddy current sensor needs to be calibrated before use. [0004] Most of the existing calibration methods are offline calibration, that is, the eddy current sensor and the measured cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 李国龙李喆裕徐凯董鑫唐晓东
Owner CHONGQING UNIV
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