Electronic direct-reading counter for wet type water meter

Abstract

An electronic direct-reading counter for a wet type water meter comprises a plurality of indication wheels and a plurality of carry coupling wheels corresponding to the indication wheels. The electronic direct-reading counter is characterized in that an indication wheel box of a meter seat is provided with mutually-closed indication wheel cavities and cavity grooves and cavities for mounting of circuit boards, the indication wheels are coaxially mounted at sectional intervals in the indication wheels, shaft core portions on two sides of each indication wheel are provided with a permanent magnet and a magnetic shielding plate respectively, and a magnetically inductive angle sensor coaxially corresponding to each permanent magnet of the shaft core of the indication wheel is arranged in the middle of each indication wheel. The electronic direct-reading counter has the advantages that 360-degree all-around measurement of the indication wheels can be realized, measurement resolution depends on practical precision of analog-to-digital conversion, and reading is accurate and stable; each indication is carried over to '0' every '9', reading from low order to high order in a carry manner is realized, sufficient reference information is available, and coincident codes and error codes are avoided; and electronic devices are reduced greatly, the risks of product faults can be reduced greatly, and water proofing level can reach IP68.

Description

technical field [0001] The water meter involved in the present invention is, in particular, an electronic direct-reading counter of a wet water meter. Background technique [0002] At present, in the traditional mechanical wet water meter, photoelectric coding technology is mainly used to collect word wheel coding information to realize the electronic direct reading of the gear drive accumulative counter. In summary, there are still defects in the following aspects: [0003] 1. The contradiction between the limited size of the counter and the limited character wheel coding, the limited coding resources cannot accurately locate the position of the character wheel, resulting in the lack of necessary information when the character wheel enters the "0" position every "9" Even if the geometric size of the counter is allowed, the positioning accuracy of the word wheel can be improved by increasing the number of photoelectric tubes (increased encoding data), but at the same time i...

AI Technical Summary

Problems solved by technology

[0003] 1. The contradiction between the limited size of the counter and the limited character wheel coding, the limited coding resources cannot accurately locate the position of the character wheel, resulting in the lack of necessary information when the character wheel enters the "0" position every "9". Even if the geometric size of the counter is allowed, the positioning accuracy of the word wheel can be improved by increasing the number of photoelectric tubes (increased encoding data), but at the same time it brings about an increase in manufacturing costs, and the electronic components The increase in components also increases the risk of product failure, which affects the promotion and application of traditional mechanical wet electronic direct-reading water meters

[0004] 2. When the wet water meter adopts photoelectric coding technology to collect word wheel coding information to realize counter electronic remote transmission and direct reading, when the optical path passes through the liquid seal medium that may have air bubbles (which may be caused during production, transportation, storage and use) , the reflection and refraction of light cause reading errors and other faults are inevitable, this kind of excessive requirements on the production and use process, it is difficult to put into large-scale production and application in practice

[0005] 3. In order to prevent freezing of water meters in northern my country, most of them are placed in residential buildings or in water meter wells. The accumulated water in the rainy season has higher requirements on the waterproof level of water meters in water meter wells, especially electronic water meters. Wet photoelectric direct-reading water meters are often not filled with glue for easy maintenance. Therefore, it is difficult to achieve the corresponding waterproof level. Moreover, the current potting fillers are easily oxidized at room temperature and become cloudy and opaque, which is not suitable for application in photoelectric detection environments.

Images