Counter encoding extension method based on character wheel counting device

Abstract

The present invention relates to a counter encoding extension method based on a character wheel counting device. The current method is small in encoding number and low in precision, and is liable to reading error of the critical position. The voltage of the light current in the complete conducting state of a photosensitive receiving tube is marked as V, and the voltage V0 of the light current of the photosensitive receiving tube in the detection work is marked as V0; when 0<=V0<=V / 4, the state of the photosensitive receiving tube is a cut-off state and is expressed as '3'; when V / 4<=V0<=V / 2, the state of the photosensitive receiving tube is a 1 / 3 conduction state and is expressed as '2'; V / 2<V0<=3V / 4, the state of the photosensitive receiving tube is a 2 / 3 conduction state and is expressed as '1'; and when 3V / 4<V0<=V, the state of the photosensitive receiving tube is a total conduction state and is expressed as '0'; and the states of the photosensitive receiving tube is finely divided as the cut-off state, the 1 / 3 conduction state, 2 / 3 conduction state and the total conduction state for performing encoding. The counter encoding extension method based on the character wheel counting device solves the problems that the counter has a blind area at linkage carrying, and can find the corresponding coding values when there is deviation in the installation of the photosensitive receiving tube.

Description

technical field [0001] The invention belongs to the field of measuring instruments, and in particular relates to a counter code extension method based on a character wheel counting device. Background technique [0002] Existing counters used for measuring instruments and instruments have one of the more obvious defects: the number of codes is small, the accuracy is poor, and the critical carry position when the counter character wheel is linked to carry cannot be accurately distinguished, and blind spots at the critical position are prone to occur, resulting in Critical position reading error. Sometimes in order to obtain more code numbers, or by increasing the number of photoelectric sensors, or designing a more complex counter structure, this not only increases the cost, but also increases the difficulty of processing and manufacturing. At the same time, due to the increase in the number of sensors, the difficulty of later maintenance is also increased, and the stability ...

AI Technical Summary

Problems solved by technology

[0002] Existing counters used for measuring instruments and instruments have one of the more obvious defects: the number of codes is small, the accuracy is poor, and the critical carry position when the counter character wheel is linked to carry cannot be accurately distinguished, and blind spots at the critical position are prone to occur, resulting in critical position reading error

Sometimes in order to obtain more code numbers, or by increasing the number of photoelectric sensors, or designing a more complex counter structure, this not only increases the cost, but also increases the difficulty of processing and manufacturing

At the same time, due to the increase in the number of sensors, it also increases the difficulty of later maintenance, and the stability of the product will also be affected

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