Excitation device for detecting mechanical waves of a wood material

Abstract

The invention discloses an excitation device for detecting mechanical waves of a wood material, comprising a laser sensor, a beater and a signal pickup; wherein, the laser sensor is used for detecting the position of the wood material on line and determining the time of central beating according to transfer speed and specification size of the wood; the beater is used for beating the central area at the end of the wood material according to the beating time command of the laser sensor; the signal pickup is arranged on the side of a transfer mechanism and is used for receiving the mechanical wave signals generated on the wood material; the side of the transfer mechanism is opposite to the beater. The excitation device adopts the laser sensor and the beater; therefore, positioning and beating are more accurate; the operational failure rate of the device is low; the central area at the end surface of the material is effectively beaten and no problems such as beating-missing or mis-beatingand the like exist.

Description

technical field [0001] The invention relates to an excitation device in the online mechanical wave detection process of wooden materials. Background technique [0002] The detection level of wooden materials is directly related to the quality and safety assurance of its products. In recent years, with the development of science and technology, non-destructive detection methods have been gradually applied to the wood field, but because they are still in their infancy, many technologies still need to be improved or upgraded. Among them, the excitation device that plays an important role in the process of factory online non-destructive testing adopts a traditional mechanical transmission mechanism or drives a gear to rotate through a motor, and then realizes a certain force of reciprocating motion, that is, knocking. This type of excitation device has many disadvantages: [0003] 1. The specifications of the same batch of testing materials are required to be strictly unified,...

AI Technical Summary

Problems solved by technology

[0005] 3. Due to the mechanical transmission and linkage used for position detection and striking, the detection speed is limited;

[0006] 4. The debugging work before testing is cumbersome, and the debugging work is highly technical and has large human errors;

[0007] 5. The noise generated during the detection process is large, which is easy to interfere with the subsequent signal acquisition work;

[0008] 6. It is impossible to achieve precise and fixed-point hitting, and there are missed and wrong hits, resulting in low reliability and accuracy of the entire detection;

[0009] 7. High failure rate and difficult maintenance

[0010] The above problems seriously restrict the improvement of the online detection level of wood materials, so we need to find practical and effective solutions

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