Counting digit wheel radial transmitting photoelectric direct-reading apparatus of long distance transmitting meter

Abstract

Disclosed is a remote transmitting meter number wheel radial transmission photoelectric direct-reading device, which fundamentally solves the problems of large number of elements, low noise ratio and high error code probability of the existing photoelectric direct-reading device; the photoelectric direct-reading device of the invention comprises a meter bracket, as well as a character wheel shaft, a code reader and a multi-bit encoding number wheel fixed on the meter bracket. The invention is mainly technically characterized in that the character wheel shaft adopts a split cylindrical light-shading shaft with a light transmission window; light-emitting diodes are arranged on a built-in circuit board of the shaft; the encoding number wheel is composed of a light transmission wheel body and a light-shading wheel body through assembly; the code reader is composed of a closed cover, as well as a photoconductive framework with a photoconductive slot, a receiving circuit board with a triode, and an encoder which are sealed inside the closed cover; the center of each light-emitting diode is superposed with the centerline of the light transmission wheel web of the light transmission wheel body, and the centerline of the photoconductive slot. The device of the invention has rational structural design, high transmission light path signal-to-noise ratio, small light loss, less elements and low manufacturing costs, which is suitable for mass production and can avoid <number hopping and error code> to significantly improve the reading accuracy.

Description

technical field [0001] The invention relates to a character wheel photoelectric direct reading device applied to meters such as remote metering water meters, electricity meters, gas meters, etc. The digital wheel radial transmission photoelectric direct reading device of the transmission meter. Background technique [0002] At present, according to relevant domestic and foreign patent documents, with the rapid development of electronic digital technology, the traditional decimal mechanical wheel counter is gradually being applied to remote metering of water meters, electricity meters, gas meters and other meters by mechatronics. The character wheel photoelectric direct reading device is replaced, such as the "fixed wheel for the counter in the meter" of the announcement number CN2641731Y, the "electronic digitalization method of the mechanical word wheel and its passive automatic meter reading system" of the announcement number CN1236281C, and the announcement number CN12362...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a remote meter digital wheel radial transmission photoelectric direct reading device, which fundamentally solves the existing photoelectric direct reading device It has the advantages of a large number of components, low signal-to-noise ratio, and high probability of error codes. It has the advantages of reasonable structural design, high signal-to-noise ratio of the transmitted light path, small light loss, small number of components, and low manufacturing cost, and can avoid "" The phenomenon of "jumping characters and wrong codes", so the reading accuracy is significantly improved, and it is suitable for mass production

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