Character wheel position judging and counting device based on capacitance and metering instrument

Abstract

The invention relates to the technical field of metering and counting, in particular to a character wheel position judging and counting device based on capacitance and a metering instrument. The device comprises a metering device which comprises a counter and a controller electrically connected with the counter, the counter comprises a counter frame and a character wheel arranged on the counter frame; the counting device further comprises a signal plate arranged on the counter support, the signal plate corresponds to the character wheel, a first conducting strip is arranged on the character wheel, a second conducting strip is arranged on the side, opposite to the character wheel, of the signal plate, and the second conducting strip is electrically connected with the controller. The metering instrument is provided with the counting device. In the rotating process of the character wheel, the position of the character wheel is judged through polling the capacitance condition of each conducting strip and the difference value state of the capacities, and the mode is not interfered by a magnetic field and light. The air between the gaps of the metal conducting strips is used as a mediumwithout additional devices, so that the probability of counter abnormity caused by device faults is reduced, and meanwhile, the equipment cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of metering and counting, in particular to a capacity-based character wheel position judgment counting device and a meter using the counting device. Background technique [0002] Counting technology is an important technology to realize the acquisition and utilization of measurement data. In the field of measuring instruments, direct reading technology is widely used because of its absolute measurement characteristics. in addition. The direct reading technology also has the characteristics of saving energy consumption and no need to store the cumulative value. The photoelectric direct reading technology is the most representative of the direct reading technology, which is widely used in the data technology of water meters and gas meters. [0003] The current photoelectric direct reading method is to open several arc-shaped slots of different sizes on the character wheel, install circuit boards in parallel...

AI Technical Summary

Problems solved by technology

[0004] Since the value of the character wheel of the direct-reading counter needs to be read directly, the character wheel cannot be shielded. When there is external light interference, it will affect the light emitted by the photosensitive device, causing the measurement signal to be interfered, and false alarms will occur, resulting in readings abnormal

During use, photoelectric devices will undergo characteristic decay after long-term use, and external water vapor and oil gas are easy to adhere to the surface of photoelectric devices, resulting in polarization and refraction, resulting in abnormal readings

At the same time, because the judgment method of the photoelectric direct reading counter is realized in the form of coding, dozens or even dozens of pairs of photoelectric devices are required to complete the coding process, so the cost is relatively high

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