Metal anti-counterfeiting identification method based on ultrasonic backscattering attenuation coefficient spectrum

Abstract

The invention relates to a metal anti-fake identification method based on an ultrasonic backscattering attenuation coefficient spectrum. The fake identification on a metal material is completed through five steps of pre-treating a reference sample, acquiring a time-domain signal, calculating the attenuation coefficient spectrum of the reference sample, calculating self-relevance coefficients of the attenuation coefficient spectrum in the reference sample, and calculating relevant coefficients between the sample to be tested and the attenuation coefficient spectrum of the reference sample. By adopting the metal anti-fake identification method, a metal product does not need to be damaged and is not damaged in the identification process, so that non-destructive identification is achieved; in addition, compared with a conventional physical and chemical identification method, the result that whether the metal is true or fake can be obtained through independent identification, and moreover the identification result is accurate and reasonable, the identification method is relatively simple, the cost is low, the identification speed is fast, on-line identification is easy to achieve, and popularization and application are facilitated.

Description

Technical field

[0001] The invention relates to the technical field of metal identification, in particular to a metal anti-counterfeiting identification method based on ultrasonic backscatter attenuation coefficient spectrum. Background technique

[0002] The anti-counterfeiting identification technology of metal materials has a broad and very important application background. In industrial production, due to the gradual reduction of global resources, the price of precious metals has been rising. Unscrupulous companies may use alloys or other products like the craftsman who made crowns in ancient Greece. Fraudulent methods replace precious metals to reduce product costs and use shoddy products. If there is no scientific means for their anti-counterfeiting identification, it will cause major losses to production and life. Actually, it is used in many important applications such as metal precious cultural relics anti-counterfeiting identification, military equipment, etc. Metal ant...

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