Electronic counting method of electromechanical counter and counter employing the method

Abstract

The invention discloses an electronic counting method for mechanical counters and a counter therefore, wherein one character wheel of a mechanical counter is provided with an encoding structure to be a sampling character wheel; an electronic system reads codes via a sensor and an arc region corresponding to the codes, utilizes at least one arc region as counting characteristic position, compares the arc region sampled in this time with an arc region sampled in last time, judges if the sampling character wheel passes the characteristic position in rotation, if passes, counts and stores. The technical scheme is that: the electronic system realizes electronic counting and stores number via timely sampling, reading codes, judging counting and electronically storing, thus completely replacing prior pulse mechanical counters. The counter has the advantages of strong interference resistance, low measurement error, high reliability, low power consumption and long service life. Compared with direct read mechanical counters, the invention reduces manufacture cost significantly and obtains high performance price ratio.

Description

technical field [0001] The invention is applied to water meters, electric meters, gas meters and the metering fields using traditional mechanical decimal counters, and in particular relates to an electronic counting method for electromechanical counters and a counter using the method. Background technique [0002] At present, there are two main electronic counting methods for electromechanical counters: [0003] One is the pulse type, that is, the number of rotations of the counter wheel is measured by pulse output through optical, magnetic or resonance induction, and a pulse or pulse group is output for each rotation, which is then processed by the electronic system and accumulated And storage, so as to realize the measurement of the physical quantity to be measured by the meter. Using mechanical and electronic independent counting storage and double metering, although the structure is simple and low cost, there are two problems: 1. Because the sensor generates pulse signa...

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Problems solved by technology

Using mechanical and electronic independent counting storage and double metering, although the structure is simple and low cost, there are two problems: 1. Because the sensor generates pulse signals and transmits them to the electronic system through the induction of light, magnetism or resonance, so , the pulse measurement is susceptible to interference and attacks, which will affect the accuracy of the measurement, and the measurement error will accumulate; 2. The pulse measurement device must always be in working state during the whole process of measurement, so it will generate a large power consumption, and at the same time The service life of related devices is also affected

Mechanical counting and storage are used, while the electronic system only directly reads the measurement value of the mechanical counting structure. In this way, although there is no measurement error and it is not easy to be disturbed and attacked by the outside world, due to its complex structure, the number of photoelectric sensors used is large. Therefore, its overall reliability and manufacturing cost are relatively lacking, and the cost performance is relatively low.

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