Mechanical-sensor electronic water meter

Abstract

The invention discloses a mechanical-sensor electronic water meter. The mechanical-sensor electronic water meter is composed of a mechanical base meter and a circuit box receiving magnetic field signals and carrying out computer processing. The base meter is composed of a machine core generating water flow signals and a shell sealing a water channel; the circuit box is divided into an upper portion and a lower portion, wherein the lower portion is a magnetic tunnel effect sensor protected by an antimagnetic cover, the upper portion is a main circuit board provided with a lithium battery, and a liquid crystal display is arranged at the top of the main circuit board. The mechanical-sensor electronic water meter has the advantages that the built-in battery of the meter is not replaced, and the meter can normally work more than ten years or above; infringement of the wet working environment is avoided; meanwhile, the mechanical-sensor electronic water meter has the functions of resisting magnetic interference, resisting unlawful disassembling, resisting dust pollution and the like; it is guaranteed that the measuring accuracy of the water meter is not influenced by water pressure changes; as an impeller is designed, sensitive wear resistance is guaranteed; the proportion is close to the density of water, and the mechanical-sensor electronic water meter moves along with the rule of water flow; the antimagnetic structure is not interfered through an external high magnetic field, and can guide an internal magnetic field to do not generate adsorption effect on rust in water.

Description

technical field [0001] The invention relates to a mechanical sensor type electronic water meter, which belongs to the field of flow measurement. Background technique [0002] The speed flow ratio of mechanical water meters, as well as pulse water meters and direct-reading water meters, can only be a fixed ratio, that is, the gear ratio of the water meter gear set. The key component in the electronic water meter - the single board computer circuit, is most afraid of water damage. Especially for the technical requirements of ultra-low power consumption, let alone a drop of water, even if the humidity of the working environment increases, the discharge current between the positive and negative lines will increase. It is enough to exhaust the battery prematurely and make the remote water meter invalid. [0003] Secondly, the sensor method currently uses a magnetic tunnel effect tube. Because the signal source of the water meter is on the impeller in the base water, and the se...

AI Technical Summary

Problems solved by technology

However, the magnetic field will absorb the rust in the water and block the rotation of the impeller; the external strong magnetic field will interfere with the work of the internal sensor, making the water meter unable to measure normally

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