Detection device of metal foreign body of postage meter
A metal foreign body and detection device technology, applied in the field of postage machines, can solve the problems of unavoidable damage to the postage machine by metal foreign bodies, inability to detect metal foreign bodies in envelopes in real time, etc., so as to suppress noise interference, prevent false alarms and false alarms, and facilitate system integration. Effect
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[0017] The present invention will be further described below in conjunction with the accompanying drawings.
[0018] refer to Figure 1 ~ Figure 3 , a postage machine metal foreign matter detection device, comprising a frame, a print head 1 is fixedly installed on the frame, and a metal detector 2 for detecting metal is installed on the frame, viewed from the direction of movement of the envelope 3, the The metal detector 2 is located at the back of the printing head 1, and the metal detector 2 is connected to a microprocessor for sending an emergency stop signal to the postage meter if there is a metal foreign object according to the signal of the metal detector.
[0019] The metal detector 2 is connected to an A / D converter, and the A / D converter is connected to the microprocessor, and the microprocessor includes: a filtering module for median filtering the voltage signal of the metal detector ;A correction module for performing error correction on the signal after median f...
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