KR200362743Y1 - Apparatus for shilding external magnetic force in electical service water meter - Google Patents

Abstract

The present invention relates to a water meter attached to an electronic water meter and shielded to protect the electronic water meter from external magnetic force, and attached to an external magnetic force blocking device for detecting and reporting the external magnetic force.

Description

External magnetic shutoff device of electronic water meter {APPARATUS FOR SHILDING EXTERNAL MAGNETIC FORCE IN ELECTICAL SERVICE WATER METER}

The present invention relates to a magnetic shield device of the water meter. More specifically, the present invention relates to an apparatus for cutting off external magnetic force of an electronic water meter and transmitting related data when a magnetic force is approached through a communication unit installed in the water meter.

Conventionally, a water meter is a method of mechanically measuring the flow of water and converting it to a meter scale and displaying it. Such a mechanical meter has to be made by individual meter readers, and to compensate for this, an electronic meter having a means for delivering a meter reading to a manager has been developed. There have been various limitations on the spread of electronic meters, such as defects in remote transceivers and excessive initial investment, but the demand for electronic meters continues for the purpose of rapid development of information technology and integration of household meters using them.

It is a security problem that a new problem arises in the spread of the electronic meter. Conventional mechanical meters are fundamentally impossible for electrical hacking, and the meter readers visit at regular intervals, thereby preventing problems such as leaks through the improvement and modulation of the meters. In Korean Patent No. 10-0377485, Korean Patent Application No. 10-2001-0020291, and Korean Utility Model Registration Application No. 20-2003-0000678, the impeller rotates by a flowing fluid and generates a magnetic field attached thereto. Disclosed is a system that detects a signal from a magnet to be used, accumulates the amount of use, and transmits it to a remote manager through communication.

However, electronic meters based on remote meter reading have been required to solve security problems. For example, hacking through communication of electronic meters, modulation of data, measurement disturbance by magnetic force, and the like.

In particular, the system for preventing disturbance of the electronic meter by the access of external magnetic force and, if such a situation occurs, deliver it to a remote meter manager so that appropriate measures can be taken, or a meter device having such a system attached thereto. The need has continued.

It is an object of the present invention to provide a device for protecting a water meter by blocking an external magnetic force approaching the electronic water meter, and transmitting the access of the external magnetic force to the manager.

Another object of the present invention relates to a water meter that protects the water meter by blocking external magnetic force when the electronic water meter approaches, and transmits the external magnetic access situation to the manager.

Other objects and features of the present invention will be clearly understood through the preferred embodiments described below.

1 is an exploded cross-sectional view and an enlarged view of a magnetic field shielding electronic water meter according to the present invention.

2 is a block diagram of a magnetic field shielding electronic water meter according to the present invention.

3 is another embodiment of the magnetic shielding member according to the present invention.

100: flow meter

200: measuring instrument

201: Sensor PCB

202: main PCB

203: PCB Boss

204: LCD screen

205 Meter Cover

301: shielding member

302: reed switch

303: Micom

304: communication unit 305: central meter reading device 306: magnetic force detection unit

The present invention to achieve the above object

An electronic water meter comprising a flow meter in which a rotation of a magnet is generated by a flow of a flow rate, and a measuring device including a sensor part for detecting rotation of the magnet, wherein the sensor part is protected from external magnetic force by a high permeability metal member. The electronic water meter is characterized in that it comprises a warning system for detecting external magnetic force.

In one aspect of the present invention, the high magnetic permeability metal member for external magnetic shielding is a sensor unit for detecting the rotation of the magnet generated by the rotation of the impeller, more specifically, the sensor PCB with the sensor is blocked by the external magnetic force It is installed in order to. The sensor PCB refers to a PCB on which a sensor for detecting rotation of a magnet is installed, which may be installed integrally with or separated from the main PCB on which a microcomputer for controlling the electronic water meter is installed. In a preferred embodiment of the invention, the sensor PCB can be installed separately in the bottom of the meter to effectively block the external magnetic force, to accurately detect the rotation of the magnet.

In one embodiment of the present invention, a high permeability metal member installed to protect the device, in particular the sensor PCB, protects the sensor PCB from external magnetic forces, while detecting the rotation of the magnet generated in the flow meter. The direction in which the rotating magnet is installed is open and the other direction is closed.

In one embodiment of the invention, the high permeability metal member may have a cylindrical shape closed one end. In another embodiment of the present invention, the high permeability metal member may be elliptical or round open at one end. In one embodiment of the invention, the open end may be partially open. In one embodiment of the invention, the open end may be bent inward or may be opened in the direction in which the magnet is installed by forming a plurality of small holes.

In one embodiment of the invention, the cylindrical shape with one end closed is installed to cover the sensor PCB with the open end facing down, so as to detect magnet rotation from the flow meter installed at the bottom of the meter. It is isolated from external magnetic force by the cylindrical metal member.

The shielding member for blocking the external magnetic force may use a high permeability metal, and may use an alloy of iron, manganese, cobalt, nickel, and the like. In addition, in one embodiment of the invention, the Fe-Ni alloy can be used to produce a thin film and then stacked in multiple layers.

The shielding member preferably has a thickness of about 1 to about 10 mm, so that economic efficiency can be considered while maintaining proper blocking rate performance.

The sensor for detecting the approach of the external magnetic force may use a magnetic force sensor. The magnetic force sensing sensor may use various types of magnetic force sensing sensors, preferably a reed switch.

In one embodiment of the invention, the reed switch is preferably installed on the outside of the shielding member, so as to know the access of the magnetic force. In one embodiment of the invention, the reed switch may be installed in another space that is not shielded by the metal member in the water meter, preferably may be installed on the outer surface of the metal member.

In one aspect of the invention, the electronic water meter according to the present invention detects the approach of the magnetic force from the magnetic force sensor and delivers it to the manager. In one embodiment of the invention, the signal from the magnetic force sensor can be detected using a microcomputer installed in the electronic water meter. The signal input to the microcomputer is transmitted to the external manager through the communication unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded cross-sectional view and an enlarged view of a magnetic shielding water meter according to an embodiment of the present invention. As shown in FIG. 1, the flow meter 100 includes a casting body 101 and a casting cover 106. An impeller housing 102 and an impeller cover 105 are installed in the casting body 101, and an impeller 103 and a magnet 104 are installed in a space formed by the impeller housing 102 and the impeller cover 105. . The impeller 103 rotates by the flow of the flow rate in the casting body 101, and the magnet 104 attached to the impeller 103 rotates when the impeller 103 rotates.

The meter 200 is installed on the flow meter, and the meter 200 is fixed to the flow meter by a band 108 and a band lock 107. In order to more clearly recognize the signal generated by the magnet 104, the sensor PCB 201 to which the sensor is attached is separated from the main PCB 202 so that the center of the PCB boss 203 is the main PCB 202 support. It is installed on the floor. An LDC screen 204 serving as a display device is installed on the main PCB 202, and a meter cover 205 is installed. The detector cover 205 is fastened to the PCB boss 203.

A reed switch 302 is attached to an upper surface, and a cylindrical high permeability metal member 301 having an open lower portion is installed to cover the sensor PCB 201. In one embodiment of the invention, as the material of the shielded company, as the material of the shield member, MuMETAL, HyMu80, Hipernom, Permalloy 80 and the like can be used.

As shown in FIG. 2, when the external magnetic force approaches the reed switch 302, the magnetic sensing unit 306 detects this and transmits it to the microcomputer 303, and the microcomputer 303 analyzes and stores it. Stored in the device 307, and delivered to the central central meter 305 through the communication unit 304 to inform the access of the magnetic force and enable the administrator's action.

In one embodiment of the invention, the operating range of the reed switch 302 may be set to correlate with the shielding strength of the shielding member. More specifically, the operating range is set so that the reed switch 302 is operated only when the magnetic force approaches the level of magnetic force that cannot be shielded by the shielding member. As a result, only at a certain level of magnetic approach, the situation is sent to the manager.

In another embodiment of the invention, as shown in Figure 3, the shielding member is a cylindrical shielding member 301 of the upper closed form bent inward.

In the above described with reference to a preferred embodiment of the present invention, those skilled in the art, when reading the specification of the present invention, various changes or modifications can be made within the scope without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the above embodiment, but should be determined by the utility model registration claims described below.

As described above, according to the present invention, when an external magnetic force approaches the electronic water meter, an apparatus for protecting the water meter and transmitting the external magnetic force access to the manager is provided. As a result, a water meter is provided to protect the water meter by blocking the external magnetic force when approaching, and transmits the external magnetic access situation to the administrator, and the security, which is the biggest problem in expanding the application of the electronic water meter, has been greatly improved.

Claims (8)

In the electronic water meter consisting of a flow meter for generating a rotation of the magnet by the flow of the flow rate, and a measuring unit including a sensor for detecting the rotation of the magnet, The sensor unit surrounds the sensor unit and is protected from external magnetic force by a high permeability metal member which is at least partially open to detect rotation of the magnet, The measuring device includes a magnetic shielding electromagnetic water meter, characterized in that it comprises a warning system for sensing the external magnetic force. The magnetic shield electromagnetic water meter according to claim 1, wherein the high permeability metal member is opened to face the rotating magnet, and the other direction is closed. The magnetic shield electronic water meter according to claim 1, wherein the high permeability metal member has a cylindrical shape with one end closed. 4. The magnetic shield electronic water meter according to claim 3, wherein the open end in the magnet direction is bent inward or a plurality of small holes are formed so that at least a part thereof is opened. The magnetic field shielding electronic water meter of claim 1, wherein the high permeability metal member is made of an alloy made of two or more metals selected from the group consisting of iron, manganese, cobalt, and nickel. The magnetic field shielding electronic water meter of claim 1, wherein the external magnetic force sensor is a reed switch. The magnetic field shielding electronic water meter of claim 1, wherein the reed switch is installed outside the high permeability metal member. The magnetic field shielding electronic water meter according to claim 6 or 7, wherein the reed switch is set to operate only at a magnetic force greater than a shielding range of the high permeability metal member.