Knife handle type ultrasonic thickness measuring device and measuring method based on wireless communication

Abstract

The invention discloses a knife handle type ultrasonic thickness measuring device and method based on wireless communication, and belongs to the technical field of ultrasonic thickness measurement. According to the device, an ultrasonic sensor, a wireless communication unit, an excitation / receiving unit, a power supply and other modules are organically integrated with a cutter handle structure and can be conveniently integrated on a conventional numerical control machine tool; in the ultrasonic thickness measurement process, the industrial personal computer transmits an ultrasonic excitation signal to the ultrasonic device in a wireless communication mode and completes automatic receiving of an ultrasonic echo signal, interference of a signal cable on ultrasonic scanning motion in a conventional mode of wired communication is effectively avoided, and reliable guarantee is provided for complex feature multi-axis linkage ultrasonic on-machine thickness measurement. And the ultrasonic echo signal is subjected to compression processing and wavelet filtering processing, so that the quality of the ultrasonic echo signal is effectively ensured. The defects of an ultrasonic thickness measuring device and method based on wired communication are overcome, and the ultrasonic on-machine automatic thickness measuring capacity and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic thickness measurement, in particular to a knife handle type ultrasonic thickness measurement device and measurement method based on wireless communication. Background technique [0002] Large thin-walled parts are widely used in the field of aerospace, such as rocket tanks, rocket nozzles, etc., all involve the structure of large thin-walled parts. However, in the process of processing, due to the large lateral dimension of the part, the small wall thickness, and the poor rigidity of the part, it is easy to deform during the clamping and processing process, and the processing accuracy is difficult to guarantee. Therefore, the wall thickness measurement process is introduced in many production lines, and the processing parameters can be adjusted in real time during the processing process to improve the processing quality of the parts. Therefore, the accurate measurement of the wall thickness bef...

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Problems solved by technology

[0003] Most of the existing wall thickness measurement methods are to connect the thickness probe to the industrial computer by wire, and then measure the thickness of the workpiece by hand or installed on the machine tool. The existence of the cable will limit the measurement range, and the clamping to the machine tool The process requires manual disassembly and clamping, so in order to realize the integration of measurement and processing, the research of wireless measurement devices is very important

[0004] At present, scholars in related fields have conducted some research on on-machine measurement. In the patent "A Method for Controlling Contact State of Ultrasonic On-Machine Thickness Measurement" (application number: CN201810385105.1), the measurement system is installed on the spindle of the machine tool. The machine tool drives the ultrasonic probe to scan the part under test according to the planned path, collects contact force information in real time through the force sensor, adjusts the target position quickly and accurately, and maintains stable contact between the probe and the part surface. Sensor pose, easy to scratch parts

In the patent "Ultrasonic on-machine non-contact scanning thickness measurement equipment and method for large wall panels" (application number: CN201910234944.8), non-contact scanning thickness measurement equipment and methods are proposed, but the on-machine thickness measurement devices and methods are not It is based on wired data transmission. When wired transmission is used for on-machine measurement, the layout of the cable on the machine tool will limit the measurement range to a certain extent, and it will also cause trouble for the replacement and adjustment of the sensor.

[0005] In the above studies, there is no mention of a tool handle ultrasonic thickness measuring device and measurement method based on wireless communication

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