Method and device for accurate thickness detection of ultrasonic equivalent peak value

An ultrasonic and precise technology, applied to the device used in the detection method, uses ultrasonic waves to measure thickness, which can solve the problems of unacceptable cost and increased cost of ultrasonic thickness gauge instruments, and achieves improved measurement stability and thickness measurement accuracy. improved effect

Active Publication Date: 2017-02-15
山东中科普锐检测技术有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Therefore, this will greatly increase the instrument cost of the ultrasonic thickness gauge, which is difficult to accept in terms of cost

Method used

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  • Method and device for accurate thickness detection of ultrasonic equivalent peak value
  • Method and device for accurate thickness detection of ultrasonic equivalent peak value
  • Method and device for accurate thickness detection of ultrasonic equivalent peak value

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and embodiment, further elaborate the present invention. In the following detailed description, certain exemplary embodiments of the invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments can be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0043] The method for accurately detecting the thickness of the ultrasonic equivalent peak comprises the following steps:

[0044] Such as figure 1 As shown, step 1, put the ultrasonic probe against the object to be measured vertically and emit ultrasonic waves. Before the ultrasonic probe is tested, a coupling agent needs to be attached to the ultrasonic probe, and the ultrasonic waves reach the material interface of t...

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Abstract

The invention discloses a method for accurately detecting the thickness through an ultrasonic wave equivalent peak value. The method includes the steps of detection of ultrasonic wave echo rising edge arrival time Ts, detection of ultrasonic wave echo falling edge arrival time Tx and calculation of echo peak value time Tf, wherein the thickness of a measured object can be obtained by substituting the echo peak value time Tf into an ultrasonic wave thickness measuring calculation formula S=V*Tf / 2. The invention further discloses a device using the method. The method and the device have the advantages that measuring accuracy is improved, and the error is reduced to 0.001 mm or lower; elements are less influenced by the coupling degree, and measuring stability is improved; the phase error is basically eliminated; miniaturization can be more easily achieved, and the area occupied by a timing chip is about one tenth the area occupied by an existing timing circuit; material difference of the measured object does not influence thickness measurement; spreading of ultrasonic waves can be influenced by the pressure and temperature of an ultrasonic probe, and accuracy can be controlled within the range of 0.02 mm through the method.

Description

technical field [0001] The invention relates to a thickness detection method, in particular to a method for measuring thickness by using ultrasonic waves, and also relates to a device used in the detection method. Background technique [0002] The principle of ultrasonic measurement of thickness is similar to that of light wave measurement. The ultrasonic pulse emitted by the probe reaches the object to be measured and propagates in the object, and is reflected back to the probe when it reaches the interface of the material. The thickness of the object to be measured is determined by accurately measuring the propagation time of the ultrasonic wave in the material. The calculation formula is S=v* t / 2, where S is the thickness of the measured object, v is the propagation velocity of the ultrasonic wave in the material of the measured object, and t is the propagation time of the ultrasonic wave in the material of the measured object. [0003] The starting point of the ultrason...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B15/02
Inventor 杨庆德尹建华
Owner 山东中科普锐检测技术有限公司
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