A detection method of an ultrasonic non-destructive classification detection system for wooden materials

Abstract

The invention relates to an ultrasonic lossless classification detection system for a wood material. The system comprises an upper computer, an ultrasonic lossless detector, a frame, a transmitting transducer and a receiving transducer. The transmitting transducer and the receiving transducer are in contact with upper and lower surfaces of a to-be-detected timber through upper and lower coupling layers. The system is characterized in that the transmitting transducer and the receiving transducer are separately mounted on the frame through a first electric adjusting mechanism and a second electric adjusting mechanism, so that the positions of the transmitting transducer and the receiving transducer can be adjusted along XYZ directions. The system also comprises a clamping device and an image acquisition device. The ultrasonic lossless classification detection system for the wood material not only can correctly classify to-be-detected timbers, but also can detect the quality of the to-be-detected timbers, and the detection efficiency is greatly improved. In addition, the invention also provides a detection method applied to the ultrasonic lossless classification detection system for the wood material.

Description

technical field [0001] The invention relates to the technical field of classification detection, in particular to a detection method of an ultrasonic non-destructive classification detection system for wood materials. Background technique [0002] The existing ultrasonic non-destructive classification detection system for wood materials, its structure is as follows: figure 1 As shown, it includes a host computer 1a, an ultrasonic nondestructive testing instrument 2a, a frame 3a, and a transmitting transducer 4a and a receiving transducer 5a installed on the frame 3a and arranged opposite to each other up and down. The ultrasonic nondestructive testing instrument 2a includes An ultrasonic signal excitation module 6a, a signal conditioning module 7a, and a digital signal processing module 8a, the ultrasonic signal excitation module 6a of the ultrasonic nondestructive testing instrument 2a is electrically connected to the transmitting transducer 4a, and the transmitting transdu...

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Problems solved by technology

[0003] However, the existing ultrasonic nondestructive classification detection system for wooden materials still has the following technical problems: because the existing ultrasonic nondestructive classification detection system for wooden materials generally does not take into account the surface defects and / or internal defects of the wood to be tested , not only the quality of the wood to be tested cannot be known, but also if the ultrasonic wave emitted by the transmitting transducer 4a happens to pass through the area where the defect is located, the output signal E obtained by the receiving transducer 5a will be out It is not accurate, which affects the correct classification of the wood to be tested by the host computer 1a; even if it can be judged that there is a defect, since the existing transmitting transducer 4a and receiving transducer 5a are generally manually adjusted, it is assumed that it can be manually adjusted. Adjust the positions of the transmitting transducer 4a and the receiving transducer 5a to avoid the defect position, but at the same time keep the axis of the transmitting transducer 4a coincident with the axis of the receiving transducer 5a, which undoubtedly increases the difficulty of adjustment, And sometimes it needs multiple adjustments to avoid the defect position, so the detection efficiency is greatly reduced

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