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Eddy current sensor machine tool online calibration device and method

A technology of eddy current sensor and calibration device, which is applied in the direction of 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 optimization The effect of reducing the error

Active Publication Date: 2020-05-29
CHONGQING UNIV
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  • Abstract
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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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  • Eddy current sensor machine tool online calibration device and method
  • Eddy current sensor machine tool online calibration device and method
  • 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. The eddy current sensor machine tool online calibration device comprises a sensor fixing device and ameasured conductor fixing device. A sensor bracket in the sensor fixing device is fixed to a machine tool workbench through a holddown bolt, and a probe of an eddy current sensor is fixed to the sensor bracket through a fixing nut. A connection column of the measured conductor fixing device is clamped by an elastic collet in a cutter handle, a spring clip is fixed to the connection column througha nut and a bolt, and a measured conductor is clamped by the spring clip. The a measured conductor is controlled by a numerical control machine tool to get away from or close to the probe of the eddycurrent sensor, one time of the forward stroke and one time of the backward stoke are conducted, and when the machine tool is moved by deltax every time, a group composed of nine point data are measured; for a group of data, a current value of the center position is obtained through a secondary bilinear interpolation method; and for the non-linear section and the linear section of the eddy currentsensor, the relation between displacement and the center current value of the linear section are obtained through a least square method. The eddy current sensor machine tool online calibration deviceis simple in structure, convenient to operate and small in 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 Applications(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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