[Meter's latest patent] A water meter with automatic anti-magnetic interference and its anti-magnetic interference method

[Chinese instrument network meter patent] creative limit, instrumentation invention. Today we will introduce a national invention-invented patent - a water meter with automatic anti-magnetic interference and its anti-magnetic interference method. The patent was applied by Sanchuan Wisdom Technology Co., Ltd., and it was authorized on December 19, 2017.

Content Description

The invention relates to the technical field of water meters, in particular to a water meter capable of automatically resisting magnetic interference and a method for anti-magnetic interference thereof.

Background of the invention

Smart water meter is a new type of water meter that uses modern micro-electronics technology, modern sensor technology, and smart IC card technology to measure water consumption and transmit water data and settlement transactions. In comparison with traditional water meters, it only has flow collection and mechanical pointers for water use. The amount of features is a great improvement.

The existing smart water meter generally measures the number of sensing sensing pointers by a magnetic measuring sensor. The metering sensing pointer has magnetic or magnetic properties. For this reason, some illegal elements use water for stealing. A strong magnet is placed on the water meter, which interferes with the magnetic sensor receiving the signal from the metering sensor, causing the meter to produce an error or stop metering. In order to avoid the occurrence of the above situation, various intelligent water meters have emerged at present. For example, Chinese patent No. 200810083716 .7 discloses a water meter which detects externally applied magnetic fields by a magnetic detector and determines the control metering data by a meter data calculator. The design of the utility model patent No. 00251399.4 discloses a water metering signal acquisition device, which is composed of an oscillating coil and an oscillating attenuator of a metering moving component to resist the design of strong external magnetic field interference; Chinese Utility Model Patent No. 03229800.5 discloses a remote Water meter sending device, when the external magnetic field interference, through the reed switch, can make the reed switch work stably, identify the design of external magnetic interference; Chinese utility model patent 200420052352 .3 discloses an anti-magnetization remote transmission water meter, An annular magnetic anti-magnetic ring is arranged above the top hat to shield the design of the external magnetic field interference; the above-mentioned water meter has a complex structure, is difficult to implement, and has a high cost, and cannot be automatically controlled according to the size of the external magnetic force, thereby affecting the accuracy of the metering. .

Summary of the Invention

In view of this, the present invention aims at the absence of the existing technology, and its main purpose is to provide a water meter and an anti-magnetic interference method thereof capable of automatically resisting magnetic interference, which can be automatically controlled according to the size of an external magnetic force to ensure measurement accuracy. .

The figure is a front partial sectional view of a preferred embodiment of the present invention

The technical proposal adopted by the invention is: a water meter capable of automatically resisting magnetic interference, comprising a watch case, a movement core, a circuit board and a metering sensor; the case has a mounting seat, an electrical box is arranged on the mounting seat, and the electric box The box has a containing chamber; the movement is arranged in the mounting seat; the movement has a metering sense pointer; the circuit board and the metering sensor are both arranged in the containing chamber; the main controller and the meter are measured on the circuit board; The meter is connected to the main controller. The metering sensor is connected to the metering module. The receiving chamber is provided with an anti-interference coil group and an anti-interference sensor. The anti-interference coil group is provided with a magnetic steel sheet and is located at the metering. Immediately above the sensor, and the outer diameter of the anti-interference coil group is greater than or equal to the distance between the metering sensors; and an anti-interference drive circuit is further provided on the circuit board, and the anti-interference drive circuit is connected to the main controller, and the anti-jamming The coil group is connected with an anti-interference drive circuit, and the anti-jamming sensor is connected with the main controller.

The anti-interference sensor is located outside the anti-interference coil group. The circuit board is also provided with a power source which is connected to the main controller. A positioning portion is formed in the outer concave of the electrical box, and the positioning portion is inserted into the mounting seat. The positioning portion has a concave cavity. The bottom surface of the concave cavity is provided with a positioning groove, and the measuring sensors are respectively positioned in the positioning groove. When the anti-interference sensor senses the external magnetic force, the anti-interference sensor simultaneously detects the size of the external magnetic force and transmits the external magnetic force to the main controller. The main controller transmits the corresponding size to the anti-interference coil group according to the size of the external magnetic force. The current, in order to produce a corresponding size of the reverse magnetic force, to offset the external magnetic force, ensure that the metering sensor and the metering sensor pointer are not affected by the external magnetic force, so that the accuracy of the signal collected by the metering sensor assembly of the smart meter module is guaranteed.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, the above technical solution can be known: by using an anti-jamming sensor to sense the size of the external magnetic force, and then the main controller according to the size of the external magnetic force, Discharge the corresponding size current to the anti-interference coil group to generate a corresponding size of reverse magnetic force to cancel out the external magnetic force to ensure that the metering sensor and the metering sensor pointer are not affected by the external magnetic force, so that the smart meter module metering sensor assembly collects signals The accuracy is guaranteed. The invention has the advantages of simple structure, easy implementation and low cost.

For more information, please download the full specification of the patent.

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