A kind of paint film thickness tester and realization method

Abstract

The invention discloses a paint film thickness tester and a realization method thereof. The paint film thickness tester includes a processor module, a power supply module, a signal conditioning module, a measuring probe, a display module and a button module; Three sets of coaxial inductance coils are wound on the plastic skeleton for measurement; the signal conditioning module generates a stable oscillation signal, and converts the change of the coating thickness into the frequency change of the oscillation signal; the processor module captures the signal conditioning module by capturing The frequency of the oscillating signal is substituted into the frequency-thickness function relationship to realize the conversion from the oscillating signal frequency to the paint film thickness. The linear regulated power supply mode is adopted, the ripple interference is small, the frequency jitter of paint film thickness measurement is reduced, and the measurement error is less than 2%; through adaptive program design, it solves the problem of aging of components, probe wear and temperature in harsh environments. Measure the problems that have a greater impact, expand the range of use of the thickness gauge, and prolong the service life of the tester.

Description

technical field [0001] The invention relates to a film thickness tester and a realization method, in particular to a paint film thickness tester and a realization method. Background technique [0002] The paint film has the functions of protection and decoration for engineering materials. The surface of the material is coated with paint to form a protective film, which can prevent or delay the occurrence of corrosion and aging of the material, and prolong the service life of various materials. At the same time, the thickness of the paint film will also have a large impact on the material, and even lead to catastrophic consequences due to small errors. Therefore, how to detect the paint film thickness on the surface of the material with high precision has always been a very important issue in the construction process. The measurement of paint film thickness is mainly divided into two categories: non-destructive testing and destructive testing. Commonly used non-destructive...

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Problems solved by technology

Serious high-frequency oscillations will be generated during the boosting process, and high-frequency oscillations will introduce ripple signals that are extremely difficult to filter out. Large ripples will interfere with the reference voltage in the signal conditioning module, resulting in large measurement errors

When the frequency with large fluctuations is converted from frequency to film thickness, it will seriously affect the test stability and accuracy of the instrument

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