An ultrasonic paper thickness measuring device

Abstract

The invention discloses an ultrasonic paper thickness measuring device. The ultrasonic paper thickness measuring device is characterized in that the ultrasonic paper thickness measuring device comprises a support, a tank body, an upper ultrasonic probe, a lower ultrasonic probe, a tank body upper cover, a semispherical valve, a movable pin, a spring, a support with a siding groove, a left electromagnet, a right electromagnet, a limiting pin, a cylindrical pipe, an upper cover, a measurement end face, a paper reel and an upper support. In the measuring process, the ultrasonic probes are in liquid all the time, ultrasonic frequency is high, and the accuracy of measurement results is high. The measuring end of the ultrasonic paper thickness measuring device is located at the lower end of the paper reel, in this way, the adverse effect on the measurement results due to the tank body internal liquid disturbance caused by the up and down movement of the lower ultrasonic probe can be reduced greatly, meanwhile, the gravity center of a system can be lowered, and the stability of the system can be improved. The ultrasonic paper thickness measuring device is simple in mechanical structure, low in manufacturing cost, high in measurement accuracy and reliable in working.

Description

technical field [0001] The invention relates to ultrasonic distance measuring technology, in particular to an ultrasonic thickness measuring device for measuring the thickness of paper products. Background technique [0002] Paper is an indispensable consumable in life and work, and its quality inspection has always been a relatively important issue. Because the thickness of the paper is generally thin, and some characteristics of the paper, such as uneven fiber distribution, many gaps, easy to be deformed by external force, and cannot be immersed in liquid, etc., the measurement work is very difficult. For thickness measurement, traditional measurement methods are divided into contact measurement and non-contact measurement. The current paper thickness detection generally adopts a non-contact method. Non-contact methods are divided into ultrasonic measurement principle thickness measurement, eddy current effect principle thickness measurement and Hall principle thickness ...

AI Technical Summary

Problems solved by technology

Due to the influence of receiving blind areas, ultrasonic waves in different frequency bands of different media, and different attenuation, ultrasonic waves cannot exert the best accuracy

(2) Although the eddy current principle can improve the measurement accuracy, due to the measurement principle, the surface accuracy of the winding shaft is very high, and the cost is high, which is not conducive to industrial promotion and use.

Obviously, the thickness of paper is not suitable for this method

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