Encoding method for encoded word wheel of counter

Abstract

Provided is a coding method used for a metrologic instrument, a meter counter coding character wheel, wherein the 360 degree circumference of the side face or the end face of the character wheel is made into six coding sections in turn: an euphotic zone (a reflective zone) alpha, an aphotic zone (an absorption zone) gamma, an euphotic zone (a reflective zone) beta, an aphotic zone (an absorption zone) beta 1, an euphotic zone (a reflective zone) gamma 1, an aphotic zone (an absorption zone) alpha 1, and the arc angles meet the following relations: alpha+beta+gamma=180 DEG, alpha=72 DEG -gamma / 2, alpha1+beta1+gamma1=180 DEG, alpha1=72DEG-gamma1 / 2, the values of arc angle gamma, gamma1 are the any coding trough belt between 0 to 36 DEG. When the counter character wheel rotate for 360 DEG, the photoelectric sensor constituted of five pairs of optical photoelectric sensors and the photosensitive receiving tubes arranged on the two sides or the end face outside generate five different binary digit coding electrical signals in turns, which corresponds to the ten numbers 0-9 on the counter character wheel, and each corresponds to three groups of five binary encodings, thereby advancing the coding precision and reducing the cost.

Description

Technical field: [0001] The invention relates to an encoding method of a counter encoding character wheel, which is suitable for measuring instruments, instruments and equipment that need to use the counter character wheel for manual reading, and perform electrical signal encoding and output of ten numbers "0" to "9". Especially digital direct-reading water meters, gas meters, electric meters and other measuring instruments and meters that need to encode the display numbers corresponding to the rotation position of the counter code word wheel for electrical signal coding and output. Background technique: [0002] Existing coding methods for the coding character wheels of measuring instruments and instrument counters have obvious shortcomings: or the number of codes is small and the accuracy is poor, and the critical carry position when the coding method of the counter coding character wheel is linked to carry cannot be accurately distinguished. Critical coding blind spots ar...

AI Technical Summary

Problems solved by technology

[0002] Existing coding methods for the coding character wheels of measuring instruments and instrument counters have obvious shortcomings: or the number of codes is small and the accuracy is poor, and the critical carry position when the coding method of the counter coding character wheel is linked to carry cannot be accurately distinguished. Critical coding blind spots are prone to occur, resulting in coding errors and reading errors during critical carry; or the structure of the counter coding character wheel is complicated, the production requirements are fine, and the process is complicated, which makes the overall processing and assembly of instruments and meters difficult and the yield rate is low. The manufacturing cost of instruments and instruments is also difficult to achieve mass industrial production; or the number of sensors is large, in order to obtain more codes, the use of 6-bit, 7-bit, or even more-bit coding structures requires more sensor devices Coding output will increase the cost, increase the difficulty of processing, and deteriorate the stability of coding, etc.

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