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Electromechanical detection method of non-metallic material thickness

A non-metallic material and electromagnetic detection technology, which is applied in the direction of electromagnetic measuring devices, electric/magnetic thickness measurement, etc., can solve the problems of inconvenient operation, inability to measure the thickness of objects, and inaccurate measurement accuracy, so as to achieve the effect of measurement

Inactive Publication Date: 2007-07-04
林俊明
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  • Summary
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AI Technical Summary

Problems solved by technology

The usual thickness measurement method is to use tools such as oil scale calipers or micrometer cards to measure thickness. This method of thickness measurement is not easy to operate, especially difficult to realize online automatic detection on the production line; second, under certain conditions The accuracy of the measurement is not accurate enough
Of course, the ultrasonic detection method can also be used to measure the thickness of non-metallic material objects, but this ultrasonic thickness measurement method requires a coupling agent; second, it is powerless for workpieces with certain structures, such as for For non-metallic material objects with a structure, the thickness of the object cannot be measured by ultrasonic thickness measurement, because the honeycomb structure prevents sound waves from being reflected back

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, the electromagnetic detection method of a kind of non-metallic material thickness of the present invention, is used in the thickness detection of spherical shell-shaped synthetic plastic body with honeycomb-shaped holes, including two processes of calibration and actual measurement:

[0028] In the calibration process, it includes the following steps:

[0029] Step a. Lining a spherical shell-shaped synthetic plastic body of known thickness with a metal arc-shaped plate with a certain thickness that matches the spherical shell-shaped inner surface, and the metal arc-shaped plate is close to the spherical shell-shaped synthetic plastic body. the inner surface of the plastic body;

[0030] Step b. The electromagnetic induction probe with excitation winding coil and detection winding coil is attached to the outer surface of the spherical shell-shaped synthetic plastic body, the excitation winding coil is excited by a preset signal sent by the waveform generat...

Embodiment 2

[0037] Embodiment 2, an electromagnetic detection method for the thickness of a non-metallic material of the present invention is used in the thickness detection of a medium-density wooden flat panel, including two processes of calibration and actual measurement:

[0038] In the calibration process, it includes the following steps:

[0039] Step a. Pad a metal plate with a certain thickness on the back of the measured surface of the non-metallic material body of known thickness, and the metal plate is close to the back of the measured surface of the non-metallic material body; the non-metallic material body wherein It can be a medium-density wooden flat body, or a plastic flat body made of plastic materials, or a flat body made of other materials;

[0040] Step b. attach the electromagnetic induction probe with the excitation winding coil and the detection winding coil to the surface of the measured surface of the non-metallic material body, the excitation winding coil is exci...

Embodiment 3

[0047] Embodiment 3, an electromagnetic detection method for the thickness of a non-metallic material of the present invention is used in the thickness detection of a plastic plate body, including two processes of calibration and actual measurement:

[0048] In the calibration process, it includes the following steps:

[0049] Step a. affix the first electromagnetic induction probe provided with the exciting winding coil to the surface of the measured surface of the non-metallic material body, and attach the second electromagnetic induction probe provided with the detection winding coil to the surface of the non-metallic material body On the back side of the measuring surface, the excitation winding coil is excited by a preset signal sent by the waveform generator. The excitation signal is obtained by the detection winding coil after passing through the non-metallic material body. The electromagnetic induction signal output obtained by the detection winding coil is amplified an...

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Abstract

The invention discloses an electromagnetic detecting method for the thickness of non-metallic material, a metal plate with finite thickness is lain on the back of the detected surface of the non-metallic material with known thickness, the electromagnetic inductive probe with driving winding coil and testing winding coil is closed to the detected surface, the pumping signal is generated by the driving winding coil, the electromagnetic signal obtained by the testing winding coil is processed to get the data corresponding to the known thickness of the non-metallic material, the thickness model of non-metallic material (includes air) is established, in the actual measurement, the thickness of non-metallic material can be detected with the same method by aid of the model. Using the method, the thickness of non-metallic material with any structure can be detected, and it can reach the measuring goal for the thickness of non-metallic material conveniently, speedily and effectively.

Description

technical field [0001] The invention relates to a non-metallic material detection method, in particular to a non-metallic material thickness measurement method realized by electromagnetic detection. Background technique [0002] Non-metallic material is a material with a very wide range of applications. It is widely used in industry, agriculture, infrastructure and our daily life, such as wood, plastic, rubber, etc., which are common in our daily life. These non-metallic materials Metal materials can be made into objects with a certain shape. When it is necessary to know the relevant dimensions of these non-metallic material objects, for example, for the produced plastic board, when it is necessary to know the thickness of the board body, thickness measurement must be performed. The usual thickness measurement method is to use tools such as oil scale calipers or micrometer cards to measure thickness. This method of thickness measurement is not easy to operate, especially dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
Inventor 林俊明
Owner 林俊明
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