Ultrasonic single-double detection sensor
A detection sensor and ultrasonic technology, applied in the field of testing, can solve the problems of reduced detection sensitivity and reliability, insufficient measurement range, limited use conditions, etc., and achieve the effect of high sensitivity, high reliability, and wide measurement range
Active Publication Date: 2015-12-09
NAVAL UNIV OF ENG PLA
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Problems solved by technology
These control methods reduce the detection sensitivity and reliability due to the influence of different conditions such as mechanical structure, paper light transmittance, paper weight, paper thickness, etc.
The existing double-sheet detectors have the disadvantages of limited use conditions, low sensitivity, poor reliability, and insufficient measurement range.
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] Such as figure 1 As shown, the ultrasonic single and double sheet detection sensor of the present invention includes an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter emits an ultrasonic beam below the sheet, and the sound waves cause the thin plate to vibrate, and this will also be reversed on the other side of the thin plate A very small sound wave is generated, which is picked up by the ultrasonic receiver. If there ar...
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The invention provides an ultrasonic single-double detection sensor comprising an ultrasonic ejector and an ultrasonic receiver, wherein the ultrasonic ejector generates a high voltage pulse signal used for driving the ultrasonic receiver to emit an ultrasonic signal; the period of the high-pressure impulse signal is resonant frequency of the ultrasonic receiver; the ultrasonic ejector sequentially emits five high-pressure impulse signals to drive the ultrasonic receiver; after receiving the ultrasonic signal, the ultrasonic receiver converts the ultrasonic signal into an electric signal, the electric single is converted into a square signal through a differential amplification circuit, a filer and amplification circuit and a shaping circuit, then time between the square wave of the high voltage pulse generated by the ultrasonic ejector and the square signal of the ultrasonic wave received by the ultrasonic receiver is measured by adopting a measurement time circuit, and the time is compared with a time reference value under the stored normal single condition so as to indicate a single layer or a double layer according to a comparing result.
Description
technical field [0001] The invention relates to the technical field of testing, in particular to an ultrasonic single and double sheet detection sensor. Background technique [0002] During the printing process, due to loose or aging parts of the printing machine, there are often requirements for double-sheet detection. [0003] Existing double-sheet detectors mainly adopt electromechanical, photoelectric and capacitive methods in terms of control methods. These control methods reduce the detection sensitivity and reliability due to the influence of different conditions such as mechanical structure, paper light transmittance, paper weight, and paper thickness. The existing double-sheet detectors have the disadvantages of limited use conditions, low sensitivity, poor reliability, and insufficiently wide measurement range. [0004] Ultrasonic sensors rely on mesons to transmit energy, which can propagate in paper, and tiny substances such as paper scraps and dust will not be...
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Login to View More IPC IPC(8): B41F33/00G01S15/08
Inventor 赵华刘勇陈永冰蔡延财任浩然韩冰
Owner NAVAL UNIV OF ENG PLA