Ultrasonic wave paper thickness measuring device

Abstract

The invention discloses an ultrasonic wave paper thickness measuring device which comprises a pot body, a left ultrasonic probe, a right ultrasonic probe, a breather pipe, a piston, a left cylindrical pipe, a right cylindrical pipe, a sleeve, a fixing pin, an upper electromagnet, a lower electromagnet, a spring, a locking pin, a connecting pin, a measuring end face, a paper bearing face, a support and a bottom plate. In the measuring process, the ultrasonic probe is always placed in water, the ultrasonic frequency is high, the device is placed horizontally, the risk of measuring errors due to the fact that bubbles are attached to the ultrasonic probe is reduced, and the gravity is lowered. Due to the breather pipe, the phenomenon that liquid in the pipe can overflow when the piston moves is avoided, the bubbles generated by movement of the device can be guided out through the breather pipe, and water can be timely added when the water is too little in the pot body.

Description

technical field [0001] The invention relates to the field of ultrasonic distance measurement, in particular to an ultrasonic paper thickness measuring device for measuring paper thickness. Background technique [0002] Most of the existing ultrasonic thickness measuring devices adopt the method of vertical placement. Vertical placement has the following advantages: vertical placement can use the gravity of the device to perform a pressing action, and the opening and sealing of the device can be controlled by a one-way valve. Vertical placement can reduce the lateral volume of the device and save space. However, the vertical placement has the following disadvantages: the center of gravity of the device is too high, and the stability may not be good. Bubbles are likely to be generated during the up and down movement of the device, and the generated bubbles are easy to attach to the upper ultrasonic probe, causing the transmitted or received signal to be greatly attenuated, or...

AI Technical Summary

Problems solved by technology

However, the vertical placement has the following disadvantages: the center of gravity of the device is too high, and the stability may not be good

Bubbles are likely to be generated during the up and down movement of the device, and the generated bubbles are easy to adhere to the upper ultrasonic probe, causing the transmitted or received signal to be greatly attenuated, or even unable to receive or transmit ultrasonic waves, which seriously affects the work of the thickness measuring device, and the bubbles are not easy to adopt Other ways to remove

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