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High-precision ultrasonic thickness gauge based on multi-echo principle

An ultrasonic, high-precision technology, applied in the direction of using ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problems of incomplete measurement, echo and clutter, etc., and achieve the effect of removing coating measurement and improving consistency

Inactive Publication Date: 2018-11-06
山东中科普锐检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem of the echo echo method used in existing products is that when the ultrasonic wave passes through the workpiece below 0.15mm, lambda waves will be generated inside the workpiece, which makes the echo clutter too much and the measurement cannot be completed

Method used

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  • High-precision ultrasonic thickness gauge based on multi-echo principle
  • High-precision ultrasonic thickness gauge based on multi-echo principle
  • High-precision ultrasonic thickness gauge based on multi-echo principle

Examples

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Embodiment 1

[0034] Example 1, such as Figure 1 to Figure 7 As described above, a high-precision ultrasonic thickness gauge based on the principle of multiple echoes includes a main control module, an ultrasonic voltage receiving and amplifying module, a high-voltage pulse transmitting module, and a programmable logic module.

[0035]The main control module is connected to the high-voltage pulse transmission module and the programmable logic module, the high-voltage pulse transmission module is connected to the ultrasonic voltage receiving and amplifying module, and the ultrasonic voltage receiving and amplifying module is connected to the programmable logic module. Under the control of the main control module, the high-voltage pulse transmitting The ultrasonic wave emitted by the module is amplified by the ultrasonic voltage receiving and amplifying module, and the signal enters the programmable logic module to obtain a digital signal, which is then processed by the main control module. ...

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Abstract

The invention discloses a high-precision ultrasonic thickness gauge based on a multi-echo principle, which comprises a main control module, an ultrasonic voltage receiving and amplifying module, a high-voltage pulse transmitting module and a programmable logic module, wherein the main control module comprises a single chip microcomputer U8; the ultrasonic voltage receiving and amplifying module comprises a variable gain amplifier N252; the high-voltage pulse transmitting module comprises an operational amplifier N253; and the programmable logic module comprises a programmable logic device. Thehigh-precision ultrasonic thickness gauge based on the multi-echo principle has the following advantages that a thin part can be measured; the lower limit range of a measurement range can be expandedto 0.15mm; coating removal measurement can be realized, and influences of rust, electroplating and other treatments on thickness measurement can be avoided.

Description

technical field [0001] The invention relates to a high-precision ultrasonic thickness gauge based on the principle of multi-echo, belonging to the electronic technical field of quality control. Background technique [0002] The measurement principle of the ultrasonic thickness gauge is to generate ultrasonic waves under the excitation of high-voltage pulses through ultrasonic sensors. The speed of sound gives the thickness of the workpiece. [0003] The more commonly used ultrasonic thickness gauges are divided into pulse callback type and echo echo type. The pulse echo type has a wide range of applications, low manufacturing costs, and low technical barriers. But it cannot solve ultra-thin part measurement and through-coating measurement. The calculation method of pulse echo is qualitative analysis. During the whole measurement process, it is analyzed whether there is return of ultrasonic wave. The echo method quantitatively analyzes the returned ultrasonic signal. Accord...

Claims

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Application Information

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IPC IPC(8): G01B17/02
CPCG01B17/025
Inventor 杨庆德尹建华石文彬孙志辉
Owner 山东中科普锐检测技术有限公司
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