Counting apparatus of photosensitive gray scale

Abstract

The invention relates to a counting apparatus of a photosensitive gray scale. The counting apparatus comprises a plurality of counting print wheels corresponded to different unit amounts and all the counting print wheels are connected with a drive unit. Different gray scale segments that are different from shallow to deep are arranged at an arc surface or a side surface of each of the counting print wheel, and all the gray scale segments are in end-to-end connection. Meanwhile, at least one support is arranged at a position that is corresponded to the arc surface or the side surface of each of the counting print wheel as well as is provided with a photosensitive sensor and a luminescent device; each of the photosensitive sensor is configured with at least two luminescent devices; and the photosensitive sensors and the luminescent devices are connected with a one-chip microcomputer. According to the invention, defects of other sensing modes can be overcome, wherein the defects include a requirement on complex determination, easiness to make errors of carrying critical points and easiness of wearing and corrosion of resistor sensing contacts and the like; photosensitive sensors are used to carry out non-contact detection on different gray scales, so that purposes of print wheel numerical code determination and print wheel data reading are achieved.

Description

technical field [0001] The invention relates to a counting device, in particular to a photosensitive grayscale counting device which can be used for metering instruments such as water meters, electric meters and gas meters. Background technique [0002] At present, the passive counting devices used for metering instruments such as water meters, electric meters, and gas meters mostly use a word wheel to output a set of resistance accumulation values ​​or photoelectric signals, as described in Chinese patents 200610037799.7 and 200610115245.4. Accurately calculate and deduce each numerical value from 0 to 9 by the cumulative value of resistance or photoelectric code value, which requires complex programming processing such as accurate data calculation, encoding and decoding. Especially when the position reaches the carry point (critical point) from 9 to 0, due to the mechanical position error, the misjudgment of the reading often occurs, resulting in ten times and a hundred ti...

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Problems solved by technology

[0003] In order to solve the problems of complex judgment of resistance accumulation value or photoelectric conversion value, error-prone carry critical point, and easy wear and corrosion of resistance sensing contacts, the present invention proposes a photosensitive grayscale counting device, which uses a photosensitive sensor to measure different grayscales. Detection, to achieve the purpose of distinguishing the number of the character wheel and reading the data of the character wheel

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