A vertical ultrasonic paper thickness measuring device

Abstract

The invention discloses a vertical type ultrasonic wave paper thickness measuring device. The vertical type ultrasonic wave paper thickness measuring device is characterized by comprising a paper bearing base, a tank body, an upper ultrasonic wave probe, a lower ultrasonic wave probe, an upper tank cover, a semi ball valve, a first electromagnet, a second electromagnet, a third electromagnet, frame supports, an upper frame support, a fixed pin and a sleeve. The whole vertical type ultrasonic wave paper thickness measuring device is of a vertical type frame structure, the upper portion, the lower portion, the left portion and the right portion of the vertical type ultrasonic wave paper thickness measuring device are connected into a whole through the upper frame support, the paper bearing base and the two frame supports, and baffles are not arranged on the front portion and the back portion. By means of the vertical type ultrasonic wave paper thickness measuring device, the ultrasonic wave distance measuring principle is used for conducting high-accuracy thickness measuring on paper on the paper bearing base, the traditional measuring mode that ultrasonic waves are propagated in air is converted into the mode that the ultrasonic waves are propagated in liquid, the transmitting frequency of the ultrasonic waves is improved, and the measuring accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic ranging, in particular to a vertical ultrasonic paper thickness measuring device. Background technique [0002] Due to the rapid development of modern society, paper, as an irreplaceable consumer product, plays an extremely important role in business, education, military and other related aspects. Since there are many manufacturers of paper, each of them has different production methods and quality standards, which leads to different paper specifications. In the process of use and quality inspection, it often causes greater troubles. Especially for quality inspection agencies, due to the different specifications of different papers, it takes a lot of energy to check whether the paper is qualified and to distinguish the paper manufacturer, especially in the paper thickness inspection. Since paper is different from other thin objects such as steel plates, pipes, plates, etc., it cannot be detec...

AI Technical Summary

Problems solved by technology

Using the principle of eddy current, although it can achieve quite high precision, due to the problem of the principle, the surface precision of the shaft wrapped with paper is very high, and the domestic equipment cannot meet the requirements at all, so it can only rely on foreign imports, and the cost is very high , it is difficult to achieve large-scale promotion and use

[0004] The traditional ultrasonic echo detection can also meet the occasions with low precision requirements, but in the case of high precision or high precision measurement, due to problems in the measurement principle, such as the blind area of ​​ultrasonic waves and the frequency band of ultrasonic waves propagating in the air Problems, so that ultrasonic can not achieve high-precision measurement

This detection method has a blind area, and the detection distance is very limited. When the propagation frequency in the air is too high, the attenuation of the ultrasonic wave will be very severe, resulting in the failure to receive the echo signal.

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