Paper shredder with ultrasonic paper position detection function

Abstract

The invention discloses a paper shredder with an ultrasonic paper position detection function. The paper shredder with the ultrasonic paper position detection function comprises a shredded paper accommodating barrel, a cover body, a cover head and a paper shredder head, wherein the cover body is arranged at the upper end of the shredded paper accommodating barrel; the paper shredder head is arranged in the cover body; the cover head is arranged at the upper end of the cover body; the cover head covers the paper shredder head; an ultrasonic distance measurement device is arranged on the cover body and is used for detecting the paper full height of the paper shredder; through the processing of an MCU (micro-programmed control unit), a display screen displays the real-time paper full height of the shredded paper accommodating barrel, and the paper shredder stops shredding paper after the barrel is full of the paper and gives an alarm for controlling. The propagation velocity of ultrasonic waves in air is basically constant under a certain condition; an ultrasonic pulse signal and an accurate counter are utilized; the passage distance is equal to the product of the propagation velocity of the ultrasonic waves and the time detection relative distance; the propagation velocity of the ultrasonic waves in the air is affected by the temperature, the pressure and the like of the air, so that the error of the accurate measuring distance in within 2 CM.

Description

technical field [0001] The invention relates to a paper shredder in the process of shredding paper by using ultrasonic waves to propagate in the air with a short-range measurement accuracy of less than 2CM after temperature compensation is designed, which fully meets the paper full detection requirements of the shredder. Background technique [0002] During the working process of the shredder, the traditional methods of paper full detection include mechanical switches, infrared transceivers, etc., and false alarms or failures often occur during the working process. Therefore, the garbage can only be frequently dumped manually, which is time-consuming and labor-intensive. inconvenient. SUMMARY OF THE INVENTION [0003] In order to overcome the above-mentioned shortcomings of the existing paper shredders, the technical problem to be solved by the present invention is to provide an ultrasonic paper level detection paper shredder, which aims to solve the above-mentioned shortc...

AI Technical Summary

Problems solved by technology

[0002] During the working process of the paper shredder, the traditional paper full detection methods include mechanical switches, infrared transceivers, etc. During the working process, false alarms or failures often occur. Therefore, the garbage can only be dumped manually, which is time-consuming and laborious. inconvenient

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