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High precision ultrasonic double sheet detector

An ultrasonic and detector technology, applied in the field of high-precision ultrasonic double-sheet detectors, to achieve the effect of ensuring stability, reducing costs, and ensuring rapidity

Inactive Publication Date: 2011-11-30
多元数码印刷技术产业(中国)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it does not touch the material to be tested, it can avoid paper jam failure, but the reflectivity of the paper surface and the color of the paper may seriously affect the reliability of detection

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] When installing this high-precision ultrasonic double-sheet detection, ensure that the surface of the two probes is at a distance of 25mm to 35mm. After the installation is completed, first calibrate the paper to be tested, and specifically place the paper in the middle between the probes (work and calibration) The position of the paper is the same), press the calibration key in the keyboard circuit 9, and all the light-emitting diodes in the display circuit 2 will light up, indicating that the calibration is completed, and then the detector can perform detection work; when the ambient temperature changes, the system will be based on The temperature value replaces the corresponding correction value offset, thereby realizing temperature compensation. The selected modules are:

[0031] Microprocessor 1 adopts the high-performance, low-power system-on-chip CC2430 launched by Chipcon. The core clock of this microprocessor can run at 32MHz, which provides a guarantee for hig...

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PUM

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Abstract

The invention relates to a high-precision ultrasonic double-sheet detector. The instrument includes a processor circuit, a display circuit, an execution circuit, a signal processing circuit, a receiving circuit, a power supply circuit, a transmitting circuit, a temperature compensation circuit and a keyboard circuit. The present invention can monitor the paper feeding situation of the printing machine in real time, and output four states of empty sheet, single sheet, double sheet and alarm according to the propagation speed and energy loss of ultrasonic waves in the paper and air, so as to control the action of the paper feeding mechanism. A device, the system increases the temperature compensation circuit and software filtering method to improve the detection accuracy. The instrument has the characteristics of low cost, high speed, high precision, easy installation, etc., and can be used as a general double sheet detector.

Description

technical field [0001] The invention belongs to the field of information and automation, and in particular relates to a high-precision ultrasonic double-sheet detector. Background technique [0002] When the paper feeding mechanism in the printing machine has double or multiple sheets, it not only threatens the product quality, but also may cause damage to the host itself, so it is necessary to correctly install the double sheet detector at the position from the paper feeding mechanism into the host . At present, the double-sheet detection sensors on the domestic market are mainly mechanical and photoelectric. The principle of the mechanical double-sheet detector is to distinguish the thickness difference between single-sheet and double-sheet paper. Its price is relatively low, but it has certain requirements for paper thickness, and it is difficult to accurately detect thinner paper. Additionally, the mechanical double sheet detector makes direct contact with the paper, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H7/12
Inventor 不公告发明人
Owner 多元数码印刷技术产业(中国)有限公司
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