KR20120013596A - A Magnetic Shielding Water Meter for Preventing a Rigging - Google Patents

Abstract

PURPOSE: A magnetic force closing water gauge for preventing unexpected manipulation is provided to inform the measurement disturbance by the external magnetic force. CONSTITUTION: A magnetic force closing water gauge for preventing unexpected manipulation comprises an impeller(10), a permanent magnet(20), an impeller receiving part(30), a cover unit(40) and a sensor unit. The impeller revolves with the flow of the flow rate. The permanent magnet is attached at the upper part of impeller. The permanent magnet revolves with impeller. The impeller receiving part accepts the impeller to inside. The top of the impeller receiving part is covered with cover unit. The sensor unit senses the rotation of the permanent magnet.

Description

A Magnetic Shielding Water Meter for Preventing a Rigging

The present invention relates to a water meter for measuring the amount of tap water to be used, and more particularly, in order to effectively shield the permanent magnet and the sensor unit from the external magnetic force, as well as to shield the entire periphery of the permanent magnet and the sensor unit as well as high permeability By using a metal member, it is possible to effectively block measurement disturbance by external magnetic force, and to form a structure that can prevent the shielding film formed in the impeller accommodation portion from contacting with water to increase durability, and the impeller accommodated in the impeller accommodation portion Accurately semicirculates the flow of water to ensure accurate flow of flow, and forms a recess in the upper part of the protruding cover film for accommodating the permanent magnet, and the sensor unit is mounted on the recess to sense the rotation of the permanent magnet. Of course, by covering the periphery of the protruding cover film with a shielding film It is possible to increase the shielding rate of the external magnetic force and improve the detection rate of the sensor unit, and the controller for analyzing and transmitting the signal detected by the sensor unit has a sudden change in the rotation stop speed of the permanent magnet detected by the sensor unit outside the normal reference range. The present invention relates to a magnetic shielding water meter for prevention of tampering, characterized in that it can immediately detect and notify the measurement disturbance caused by external magnetic force by analyzing whether it is displayed and transmitting it.

Conventional water meters have used a method of mechanically measuring the flow of water and converting it to a meter scale, and this mechanical meter has to be individually metered by a meter reader, so that the cost of meter reading increases in real time. I had a problem that could not confirm the meter reading.

Therefore, in order to compensate for the disadvantages of the mechanical meter, an electronic meter that transmits and receives meter reading information remotely by electronic reading has been newly introduced, and its use is being expanded. However, the electronic meter as described above is sensitive to the magnetic force generated from the outside, because it is a principle to detect the amount of rotation of the magnet by using a sensor, and therefore, for the purpose of frequency, using a strong magnet from the outside around the meter. When the magnetic field is formed, the problem that the accurate meter reading cannot be made under the influence of the external magnetic force remains the problem to be solved most.

In particular, it is possible to completely shield all permanent magnets and sensors in the meter from the influence of external magnetic force, and also to promptly promptly warn in case of failure of accurate meter reading due to the occurrence of external magnetic force affecting the meter reading. There is an urgent need for a meter system that is difficult to remove from the outside artificially and easily.

The present invention has been made to solve the above problems,

An object of the present invention is to provide a magnetic shielding water meter for preventing tampering that can effectively block the permanent magnet and the sensor unit from the external magnetic force to block the measurement interference by the external magnetic force.

It is another object of the present invention to shield the entire area around the permanent magnet and sensor for shielding the external magnetic force, as well as magnetic shielding water meter for preventing operation to maximize the shielding effect by using a high permeability metal member To provide.

Still another object of the present invention is to provide a magnetic shielding water meter for preventing manipulation to form a structure that can block the contact film formed in the impeller receiving portion to prevent contact with water.

Still another object of the present invention is to provide a magnetic shielding water meter for preventing manipulation so that the impeller accommodated in the impeller accommodation part accurately shapes the flow of the flowing water to grasp the flow of the correct flow rate.

Still another object of the present invention is to form a recessed recess in the upper portion of the protruding cover film for accommodating the permanent magnet, and the sensor unit is mounted on the recess to sense the rotation of the permanent magnet, as well as around the protruding cover film as a shielding film. By providing a magnetic shielding water meter for preventing the operation to increase the shielding rate of the external magnetic force and improve the detection rate of the sensor by covering.

Still another object of the present invention is to provide a magnetic shielding water meter for preventing manipulation, including a second cover film which is formed to be spaced apart from the protruding cover film at a predetermined interval to cover the external magnetic force.

Still another object of the present invention is to form an insertion protrusion which is inserted into and bound to a predetermined space between the protruding cover film and the second cover film in the lower portion of the metering unit in which the sensor unit is located, and the second shielding film is located in the insertion protrusion. By enclosing around the protruding cover film, it is possible to provide a magnetic shielding water meter for prevention of manipulation to prevent the second shielding film from being artificially easily removed and to prevent corrosion.

Still another object of the present invention is to analyze and transmit a signal detected by the sensor unit to determine whether the rotational stop speed of the permanent magnet detected by the sensor unit indicates a sudden change outside the normal reference range and transmits the external magnetic force It is to provide a magnetic shielded water meter to prevent tampering that can immediately detect and notify the measurement disturbance.

Magnetic shielding water meter for preventing operation for achieving the above object of the present invention includes the following configuration.

Magnetic shielding water meter for preventing operation according to an embodiment of the present invention, the impeller to rotate by the flow of the flow, the permanent magnet is attached to the impeller is rotated with the impeller, the impeller accommodated therein It includes an impeller receiving portion to enable the stable rotation, a cover portion covering the upper part of the impeller receiving portion containing the impeller, and a sensor unit for detecting the rotation of the permanent magnet, the impeller receiving portion is made of a high permeability metal member A first shielding film is formed, and a second shielding film formed of a high permeability metal member is formed on the cover part and surrounds the permanent magnet. By effectively shielding the magnet and sensor, it is possible to block measurement disturbance by external magnetic force. And that is characterized.

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, 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. .

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, the impeller accommodation portion is formed with an inlet for allowing water to flow into the side where the wing of the impeller is located, the upper side of the inlet An outlet part is formed to allow water to flow out, and the inlet part is formed by obliquely penetrating the side of the impeller accommodation part to allow the introduced water to flow in the impeller accommodation part, and the outlet part is introduced through the inlet part to accommodate the impeller. It characterized in that it is formed by obliquely penetrating the impeller receiving portion side in a direction opposite to the direction in which the inlet is formed so that the water flowing in the part flows out.

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, both the side and the bottom of the impeller receiving portion are formed in a double membrane structure, and the first shielding membrane is formed between the double membranes, The permeability metal member is characterized in that it can increase the durability by blocking contact with water.

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, the cover part is formed with a protruding cover film protruding to accommodate the permanent magnet on the impeller, so that the second shielding film is the protruding cover film. It is formed around, and characterized in that it can shield the external magnetic force more effectively, including a second cover film is formed projecting spaced apart from the protrusion cover film at a predetermined interval.

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, the cover part is formed with a recessed portion embedded in the upper portion of the protruding cover film so that the sensor portion is seated in the recessed portion to detect the rotation of the permanent magnet By doing so, it is possible to increase the shielding rate of the external magnetic force as well as to improve the detection rate of the sensor unit.

According to another embodiment of the present invention, the magnetic shielding water meter for preventing manipulation according to the present invention is inserted into a fixed space between the protruding cover film and the second cover film in the lower portion of the metering unit in which the sensor unit is inserted and bound. By forming a protruding portion, and the second shielding film is located in the insertion protrusion to surround the protruding cover film, the second shielding film can not be easily removed artificially and can be prevented from corrosion. .

According to another embodiment of the present invention, in the magnetic shielding water meter according to the present invention, the shielding plate is formed to cover the entire upper portion of the printed circuit board (PCB) on which the sensor unit is installed so that an external magnetic force affects the sensor unit. It can be effectively blocked.

According to another embodiment of the present invention, the magnetic shielding water meter for preventing manipulation according to the present invention further comprises a control unit for analyzing and transmitting the signal detected by the sensor unit, the control unit is detected by the sensor unit By analyzing whether the rotational stop speed of the permanent magnet exhibits a sudden change out of the normal reference range and transmitting it, it is possible to immediately detect and notify the measurement disturbance caused by external magnetic force.

The present invention can achieve the following effects by the configuration, combination, and use relationship described above with the present embodiment.

The present invention has the effect of effectively blocking the permanent magnet and the sensor unit from the external magnetic force to block the measurement interference by the external magnetic force.

The present invention enables the shielding of the entire periphery of the permanent magnet and the sensor unit for the shielding of the external magnetic force, as well as has the effect of maximizing the shielding effect by using a high permeability metal member.

The present invention has the effect of increasing the durability by forming a structure that can block the contact film formed in the impeller accommodation portion to contact with water.

The present invention has an effect that can accurately grasp the flow of the flow rate by accurately half-circulating the flow of water flowing in the impeller accommodated in the impeller accommodation portion.

The present invention forms an recessed recess portion formed in the upper portion of the protruding cover film for accommodating the permanent magnet, and the sensor unit is mounted on the recess so as to sense the rotation of the permanent magnet, as well as covering the periphery of the protruding cover film with a shielding film to protect the external magnetic force. It has the effect of increasing the shielding rate of the sensor and improving the detection rate of the sensor unit.

The present invention has an effect of more effectively shielding the external magnetic force including a second cover film which is formed to be projected spaced apart from the protrusion cover film at a predetermined interval to the cover portion.

The present invention forms an insertion protrusion that is inserted into and bound to a predetermined space between the protrusion cover film and the second cover film at a lower portion of the metering unit in which the sensor unit is located, and the second shielding film is positioned in the insertion protrusion to surround the protrusion cover film. By enclosing, the second shielding film cannot be easily removed artificially and has an effect of preventing corrosion.

According to the present invention, the control unit for analyzing and transmitting a signal sensed by the sensor unit analyzes whether the rotation stop speed of the permanent magnet detected by the sensor unit indicates a sudden change out of the normal reference range and transmits the measured disturbance. It has the effect of immediately detecting and notifying.

1 is an exploded perspective view of a magnetic shielding water meter for preventing operation according to an embodiment of the present invention
2 is a plan view of the impeller accommodation portion of FIG.
3 is a reference diagram showing a state in which the water introduced in the impeller accommodation portion of Figure 1 flows out of the flow
4 is a cross-sectional view of the cover of FIG.
5A and 5B are reference views showing another embodiment of the cover part of FIG. 4.
6 is a reference diagram illustrating a state in which a sensor unit is seated on a recess of a cover unit;
7 is a cross-sectional view of the metering unit formed with the shield plate of FIG.
8 is a reference diagram showing another coupling relationship of the cover part and the metering part of FIG.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the magnetic shielding water meter for preventing operation according to the present invention will be described in detail.

1 is an exploded perspective view of a magnetic shielding water meter for preventing operation according to an embodiment of the present invention, Figure 2 is a plan view of the impeller accommodation portion of Figure 1, Figure 3 is the water introduced in the impeller accommodation portion of Figure 1 4 is a cross-sectional view of the cover part of FIG. 1, FIGS. 5A and 5B are reference diagrams showing another embodiment of the cover part of FIG. 4, and FIG. FIG. 7 is a cross-sectional view illustrating a state in which a sensor unit is mounted on a groove, and FIG. 7 is a cross-sectional view of the metering unit in which the shield plate of FIG. 1 is formed, and FIG.

1 to 8, the magnetic shielding water meter for preventing operation according to an embodiment of the present invention and the impeller 10 is rotated by the flow of the flow, the impeller 10 is attached to the upper impeller 10 Permanent magnet 20 to rotate with), the impeller receiving portion 30 to accommodate the impeller 10 therein to allow the impeller 10 to rotate stably, and the impeller 10 accommodated The cover part 40 covering the upper part of the part 30, and the metering unit 50 is located, the sensor unit 510 for detecting the rotation of the permanent magnet 20, the impeller receiving portion 30 The first shielding film 350 is formed of a high permeability metal member is formed, the cover portion 40 is formed a second shielding film 430 is formed of a high permeability metal member surrounding the permanent magnet 20, The shield plate 530 made of a high permeability metal member is positioned on the sensor unit 510. There.

The impeller 10 is configured to rotate by the flow of the flow rate, the rotation ratio is proportional to the flow rate of the flow rate, so if the flow rate is large, the rotational speed is increased, if the flow rate is small, the rotational speed is reduced and the idle You will be able to measure the flow.

The impeller 10 has a wing portion 110 is formed so that it can rotate smoothly according to the flow of the flow rate, and the permanent magnet 20 to be described later is attached to the end protruding to the upper side of the wing portion 110 The sensor unit 510 to be described later to easily detect the rotation of the permanent magnet 20 to rotate together along the impeller 10 to be rotated by the wing 110. In order for the sensor unit 510 to be described later to more easily detect the rotation of the permanent magnet 20, the upper side of the impeller 10 is formed to protrude upward (to the point where the sensor unit 510 is located). desirable.

The permanent magnet 20 is attached to the impeller 10 is configured to rotate with the impeller 10, the permanent magnet 20 is rotated together with the impeller 10, the permanent magnet 20 Rotational speed of the impeller 10 is equal to, and therefore, the rotation of the permanent magnet 20 is to measure the number of revolutions of the impeller 10 when the rotational speed of the permanent magnet 20 is measured By measuring the number, the flow of the flow can be measured (that is, the flow rate is accurately measured). On the upper side of the permanent magnet 20 is a sensor unit 510 that detects the rotation of the permanent magnet 20 and can measure the number of rotations thereof, which will be described later. However, the sensor unit 510 to detect the rotation of the permanent magnet 20 is to detect the flow of the magnetic force emitted from the permanent magnet 20, if it is affected by a separate magnetic force from the outside Since it is obstructed by accurate measurement of the sensor unit 510, it is important to shield the external magnetic force so as not to be affected by the external magnetic force.

The impeller accommodation portion 30 is configured to accommodate the impeller 10 therein so that the impeller 10 can be stably rotated, and the impeller 10 is simply located within the casting body 60 through which water flows. If the impeller 10 is difficult to rotate stably in accordance with the flow of the flow it is difficult to accommodate the impeller 10 inside the impeller 10 seated on the impeller support 360 on the impeller receiving portion 30 to impeller In order for the 10 to rotate stably, the impeller accommodation portion 30 is required.

Particularly, in the present invention, the impeller accommodation portion 30 is not limited to a configuration that merely functions to accommodate the impeller 10 therein and to stably rotate the impeller accommodation portion 30. By using the shielding that the magnetic force from the outside affects the permanent magnet 20 or the sensor unit 510 to be described later, as well as the impeller 10 can rotate accurately according to the flow of the flow It is characterized in that to further demonstrate the function of, for this purpose, the impeller receiving portion 30 is formed in a double-layer structure consisting of both the outer film 310 and the inner film 320, the side and the bottom, The first shielding film 350 is formed between the double film, that is, the outer film 310 and the inner film 320 to block the high permeability metal member from contacting with water to increase durability, and also to increase the durability of the impeller 10. Wing On the side where the 110 is located is formed an inlet 330 to allow water to be introduced, the outlet 340 is formed on the upper side of the inlet 330 to allow the water to flow out, The inlet 330 is formed to obliquely penetrate the side of the impeller 30 so that the introduced water smoothly flows along the inside of the impeller 30, and the outlet 340 is the inlet 340. In order to allow the water flowing in through the 330 to flow smoothly in the impeller accommodation portion, the impeller accommodation portion 30 may be formed obliquely in a direction opposite to the direction in which the inflow portion 330 is formed. Can be.

The first shielding film 350 is an external magnetic shielding means made of a high permeability metal member formed in the impeller accommodation portion 30, and accommodates the impeller 10 to which the permanent magnet 20 is attached. Using the unit 30 is formed to shield the magnetic force from the outside affects the permanent magnet 20 to the sensor unit 510 to be described later. The high permeability metal member is a functional material that absorbs magnetic force or changes its path so that magnetic force does not penetrate or be released. The higher the permeability, the better the magnetic flux path. It can be shielded. To this end, the high permeability metal member is preferably an alloy consisting of two or more metals selected from the group consisting of iron, manganese, cobalt, nickel, nickel-iron alloy may be used as one embodiment. The first shielding film 350 may be formed in various forms. The impeller accommodating part 30 itself is made of a high permeability metal member, and thus the impeller accommodating part 30 itself blocks a magnetic force. In this case, the high permeability metal member should be additionally added to the high permeability metal member due to the characteristics of the impeller accommodation portion 30 which is in contact with water.

In addition, in the present invention, in order to prevent the first shielding film 350 formed of a metal member from contacting with water to improve durability, the impeller accommodating part 30 may include both an outer film 310 and an inner film ( A double film structure formed of 320 may be formed, and the first shielding film 350 may be formed between the double film, that is, the outer film 310 and the inner film 320. That is, as shown in FIG. 2, the impeller accommodating part 30 contacts the water flowing into the impeller accommodating part 30 and the outer membrane 310 contacting with the water flowing in the casting body 60. After forming a double film consisting of 320 and spaced apart a predetermined distance between the outer film 310 and the inner film 320, the first shielding film 350 is formed between the outer film 310 and the inner film 320 By doing so, the first shielding film 350 is made of a high permeability metal member to perform an inherent function of shielding external magnetic force as well as to easily prevent contact with water by the outer film 310 and the inner film 320 at all times. It can increase durability that can function for a long time without rust.

The inlet 330 is a portion that is formed through the side of the impeller receiving portion 30 so that the water flowing in the casting body 60 can be introduced into the impeller receiving portion 30, in particular in Figure 3 As shown in the above, the inlet 330 is formed on the side of the impeller accommodation portion 30 at the height at which the wing 110 of the impeller 10 is positioned, as well as the inlet 330. By allowing the inflow portion 330 to be formed obliquely through the side of the impeller accommodation portion 30 so that water introduced through the impeller accommodation portion 30 can smoothly flow along the inside of the impeller accommodation portion 30, The water flowing through is guided in the direction of ① along the forming direction of the inlet 330 which is obliquely penetrated so that it can easily flow along the inner surface of the impeller accommodation portion 30. The inlet 330 is formed along the side of the cylindrical impeller receiving portion 30 as shown in Figure 3 because they are all formed obliquely in the same direction through the inlet 330 impeller receiving portion The water flowing back 30 is difficult to flow out through the inlet 330, and thus, at the height at which the inlet 330 is formed, the inflowed water does not immediately flow out, and the impeller is accommodated smoothly along the ② direction. Since the inside of the part 30 can be circulated, the wing part 110 of the impeller 10 can accurately rotate the flow of the circulating water so as to rotate together so that the flow of the correct flow rate can be grasped.

The outlet portion 340 is formed above the inlet portion 330, that is, the impeller accommodation portion 30 is formed at a higher position than the place where the inlet portion 330 is formed and is introduced through the inlet portion 330 and is impeller accommodation portion. In order to allow the water flowing back to flow smoothly, in the present invention, as illustrated in FIG. 3, the outlet part 340 is formed above the inlet part 330, as well as the inlet part ( 330 is formed by obliquely penetrating the side of the impeller receiving portion 30 in a direction opposite to the direction formed obliquely, the water guided to the height where the outlet portion 340 is formed by flowing in the direction ②, the casting body 60 ) So as not to flow out in a direction opposite to the direction (ⓐ direction) of the water flowing through the inside and to flow smoothly along the ③ direction through the outlet 340 (ⓐ direction of the water flowing in the casting body 60) Water flow in compliance with To make it possible.

The cover part 40 is configured to cover an upper portion of the impeller accommodation portion 30 in which the impeller 10 is accommodated, and the cover part 40 may accommodate the permanent magnet 20 located above the impeller 10. A protruding cover film 410 is formed to protrude so that a second shielding film 430 is formed around the protruding cover film 410, and a second protruding shape is spaced apart from the protruding cover film 410 at a predetermined interval. The cover film 420 may be further formed.

The protruding cover film 410 is a portion protruding upward from the center of the cover portion 40 to accommodate the permanent magnet 20 located on the impeller 10, the impeller as shown in FIG. 10 is a wing to position the permanent magnet 20, which transmits the magnetic force signal to the sensor unit 510 to be described later to the point as close as possible to the sensor unit 510 in order to be able to measure the rotation speed To form a portion protruding upward from the portion 110 and the shape of placing the permanent magnet 20 on the upper part, to accommodate the permanent magnet 20 located on the upper part of the impeller 10 The protruding cover film 410 is to be formed to protrude upward from the center of the cover portion (40). In addition, the upper portion of the protruding cover film 410 may be formed with a recessed portion 411 embedded in a predetermined length, which is the sensor unit 510 to be described later to detect the rotation of the permanent magnet 20 The sensor unit 510 rotates the permanent magnet 20 by minimizing the distance between the permanent magnet 20 and the sensor unit 510 by allowing the sensor 510 to detect rotation of the permanent magnet 20 by seating in the groove 411. It can be accurately detected to enable accurate measurement to improve the detection rate of the sensor unit 510.

The second shielding film 430 is formed around the cover part 40 to shield external magnetic force so as to prevent measurement disturbance from external magnetic force. More specifically, the permanent magnet 20 and In order to surround the sensor unit 510 so that the magnetic force from the permanent magnet 20 can be transmitted to the sensor unit 510 without being influenced by external magnetic force, it may be formed to surround the protruding cover layer 410. . As shown in FIG. 4, the second shielding film 430 forms a separate film on the outer circumferential surface of the protruding cover film 410 by using a high permeability metal member (the description thereof is the same as described above). If necessary, as shown in FIG. 5A, an annular cylindrical member having a hollow therein is formed by a high permeability metal member and inserted into the protruding cover film 410, or as shown in FIG. 5A. As shown in 5b, the second cover layer 420 may be formed around the second cover layer 420 to be described later. The second shielding film 430 formed in such a manner surrounds the permanent magnet 20 accommodated inside the protruding cover film 410 as shown in FIG. 4, and the permanent magnet 20 is influenced from external magnetic force. 6, the sensor unit 510 to be described below, which is seated on the recess 411, may also be shielded from being affected by external magnetic force, and thus the detection rate of the sensor unit 510 may be shielded. It will be possible to improve. For reference, the second shielding film 430 is not excluded from extending from the protruding cover film 410 to the second cover film 420 to be described later. In addition, the second shielding film 430 may be included in the metering unit 50 to be described later, as shown in FIG. 8, so that a third party having a purpose of removal cannot be easily removed. It will be described in detail in the description of the metering section (50).

The second cover layer 420 is a portion formed to protrude from the protrusion cover layer 410 at a predetermined interval from the upper portion of the cover portion 40, as shown in Figure 4 the second cover layer 420 ) Is formed to form a space at a predetermined interval between the second cover film 420 and the protruding cover film 410 to further reduce the influence of external magnetic force. As described above, the second cover layer 420 may be separately formed (shown in FIG. 5B) or extended from the protruding cover layer 410 as necessary to prevent external magnetic force. It can double the shielding effect. In addition, since the second cover film 420 is formed, spaces formed on the bottom surface of the space portion formed between the protruding cover film 410 and the second cover film 420 are radially spaced apart as shown in FIG. 5B. And a reinforcement part 440 protruding may be further formed, and by forming the reinforcement part 440 as described above, a cover part disposed between the lower impeller accommodation part 30 and the upper metering part 50. The durability of the 40 can be increased.

The metering unit 50 includes a sensor unit 510 that detects the rotation of the permanent magnet 20 to measure the flow rate and to display and transmit the information. For this purpose, the metering unit 50 includes the High permeability on the sensor unit 510 for detecting the rotation of the permanent magnet 20, the PCB 520, the printed circuit board on which the sensor unit 510 is located, the sensor unit 510 and the PCB 520 The shield plate 530 made of a metal member, the battery 540 for providing power, the display unit 550 for displaying information detected by the sensor unit 510, and the signal detected by the sensor unit 510 are analyzed. The control unit 560 may include a transmission unit.

The sensor unit 510 is configured to detect the rotation of the permanent magnet 20, mounted on the impeller 10 by detecting the number of rotation of the permanent magnet 20 to rotate with the impeller 10 The flow rate for rotating the impeller 10 can be grasped so that the amount of water used can be measured. To this end, the sensor unit 510 may be used, such as MR sensor, Hall sensor that can detect a change in the magnetic field as a change in voltage. As described above, since the sensor unit 510 must accurately sense the change in the magnetic field originating from the permanent magnet 20, the sensor unit 510 is fixed on the protrusion cover layer 410 as shown in FIGS. 4 and 6 as described above. The sensor unit 510 is a permanent magnet (5) by minimizing the distance between the permanent magnet 20 and the sensor unit 510 by detecting the rotation of the permanent magnet 20 by seating in the recess 411 formed to have a length embedded therein. It is possible to accurately detect the rotation of the 20 to enable accurate measurement to improve the detection rate of the sensor unit 510, and also if the sensor unit 510 is affected by external magnetic force Since it is difficult to accurately detect the rotation of the permanent magnet 20 through the part 510, and it is impossible to measure an accurate flow rate, it is most important to shield the sensor part 510 from external magnetic force, as shown in FIG.As shown in the drawing, the second shielding film 430 may be shielded from external magnetic force. In addition, the metering unit 50 is inserted into the predetermined protrusion between the protrusion cover film 410 and the second cover film 420 in the lower portion of the metering unit 50, as shown in Figure 8 570, and the second shielding film 430 is surrounded by the protruding cover film 410 while the second shielding film 430 is located in the insertion protrusion 570. 430 may not be artificially easy to remove. That is, when the second shielding film 430 is formed to be fitted around the protruding cover film 410 as illustrated in FIG. 5A, a third party having a purpose of counting may be easily detached from the weighing unit 50. When the second shielding film 430 is removed after the separation of the metering part 50, the second shielding film 430 becomes difficult to recognize until the metering part 50 is separated. Since the second shielding film 430 is formed in the insertion protrusion 570 formed in the metering part 50, as shown in FIG. 8, the second shielding film 430 is easily removed artificially. You can't do it. In addition, when the second shielding film 430 is positioned in the metering unit 50, the second shielding film 430 may be effectively prevented from corrosion of the second shielding film 430 formed of a metallic material.

The PCB 520 is a printed circuit board on which the sensor unit 510 is mounted, and performs a function of transmitting and receiving an electrical signal between components in an electronic meter for measuring flow rate electronically as in the present invention. .

The shield plate 530 is formed on the sensor unit 510 and the PCB 520 and is made of a high permeability metal member, and shields external magnetic force on the sensor unit 510 and the PCB 520. The external magnetic force can be prevented from affecting the sensor unit 510 or the like. The shield plate 530 may be formed in accordance with the shape of the PCB 520 to cover the entire PCB 520 in the form of a disk to cover the entire PCB 520 is formed in a circular shape Can be formed. Since the high permeability metal member constituting the shielding plate 530 is the same material as described above, the description thereof will be omitted.

The battery 540 is configured to provide power to each component of the electronic water meter according to the present invention, and various types of batteries, such as a replaceable type or a rechargeable type, may be utilized.

The display unit 550 is configured to display information sensed by the sensor unit 510 so as to be visually recognized from the outside, and a display such as an LCD may be utilized.

The control unit 560 analyzes and transmits the signal sensed by the sensor unit 510 and receives a control signal input from the outside, and controls the meter accordingly, and provides the necessary information to the display unit 550. Displaying through the to perform the function of controlling and controlling the overall meter according to the present invention.

Particularly, in the present invention, the controller 560 analyzes whether the rotation stop speed of the permanent magnet 20 detected by the sensor unit 510 indicates a sudden change out of the normal reference range, and transmits the same by an external magnetic force. It is characterized in that it is possible to immediately detect and notify the measurement disturbance. In general, when the use of tap water is stopped in a home using tap water, the physical time to shut off tap water occurs, so that the flow (speed) of the flow rate flowing through the casting body 60 does not stop at a moment, but is constant. It is gradually reduced at a ratio within the range, and accordingly, the rotation stop speed of the permanent magnet 20 detected by the sensor unit 510 is also gradually reduced at a ratio within a predetermined reference range. However, in the case where the sensor unit 510 does not detect the rotation of the permanent magnet 20 due to the influence of external magnetic force, rather than stopping the use of water generated in the normal use process, the sensor unit 510 is used. Since the moment does not detect the rotation of the permanent magnet 20, the rotation stop speed of the permanent magnet 20 detected by the sensor unit 510 is a normal reference range (which is gradually reduced within a certain range) In the present invention, the control unit 560 analyzes whether the rotation stop speed of the permanent magnet 20 detected by the sensor unit 510 indicates a sudden change outside the normal reference range. By transmitting the information, it is possible to immediately detect and notify the measurement disturbance situation by external magnetic force so that accurate measurement can be made.

In the above, the Applicant has described preferred embodiments of the present invention, but these embodiments are merely one embodiment for implementing the technical idea of the present invention, and any changes or modifications may be made as long as the technical idea of the present invention is implemented. Should be interpreted as being within the scope.

10 impeller 110: wing
20: permanent magnet
30: impeller receiving portion 310: outer film 320: inner film
330: inlet 340: outlet 350: first shield 360: impeller support
40: cover portion 410: protruding cover film 411: groove portion
420: second cover film 430: second shielding film 440: reinforcing portion
50: metering unit 510: sensor unit 520: PCB
530: shielding plate 540: battery 550: display 560: control unit 570: insertion projection
60: casting body

Claims (9)

Impeller rotated by the flow of the flow, a permanent magnet attached to the impeller is rotated with the impeller, an impeller accommodation portion to accommodate the impeller inside to allow the impeller to rotate stably, the impeller accommodated A cover part covering an upper portion of a receiving part, and a sensor part detecting a rotation of the permanent magnet,
The impeller receiving portion is formed with a first shielding film made of a high permeability metal member, the cover portion is formed with a second shielding film made of a high permeability metal member surrounding the permanent magnet, the high permeability metal member on the sensor portion The shield plate is made of,
Magnetic shielding water meter for prevention of tampering, characterized in that to effectively block the permanent magnet and the sensor unit from the external magnetic force to block the measurement disturbance by the external magnetic force. The method of claim 1, wherein the high permeability metal member
Magnetic shielding water meter for preventing tampering, characterized in that made of an alloy consisting of two or more metals selected from the group consisting of iron, manganese, cobalt, nickel. The method of claim 1, wherein the impeller accommodation portion
An inlet is formed on the side where the wing of the impeller is located, the inlet is formed to allow the water to flow out of the inlet is formed,
The inlet portion is formed by obliquely penetrating the impeller accommodation portion side so that the introduced water can flow in the impeller accommodation portion, and the outlet portion is introduced through the inflow portion so that the water flowing in the impeller accommodation portion may flow out. Magnetic shielding water meter for preventing operation, characterized in that formed through the impeller receiving portion sideways in a direction opposite to the direction in which the inlet is formed. The method of claim 3, wherein the impeller accommodation portion
Both side and bottom surfaces are formed in a double membrane structure, and the first shielding membrane is formed between the double membranes to prevent the high permeability metal member from contacting with water to increase durability. Magnetic shielding water meter. The method of claim 1, wherein the cover portion
A protruding cover film is formed to protrude to accommodate the permanent magnet on the impeller, and the second shielding film is formed around the protruding cover film, and includes a second cover film protruding from the protruding cover film at a predetermined interval. Magnetic shielding water meter for preventing tampering, characterized in that it can shield the external magnetic force more effectively. The method of claim 5, wherein the cover portion
By forming the recessed portion recessed in the upper portion of the protruding cover film to allow the sensor to be seated in the recessed portion to detect the rotation of the permanent magnet, it is possible to increase the shielding rate of the external magnetic force as well as improve the detection rate of the sensor portion. Magnetic shielding water meter to prevent tampering. The magnetic shielding water meter of claim 5, wherein
An insertion protrusion is inserted into and fixed to a predetermined space between the protrusion cover film and the second cover film, and the second shielding film is positioned in the insertion protrusion to surround the protrusion cover film. The magnetic shielding water meter for preventing tampering by preventing the second shielding film from being easily removed artificially and preventing corrosion. The method of claim 1, wherein the shield plate
Magnetic shielding water meter for prevention of operation, characterized in that formed to cover the entire upper portion of the printed circuit board (PCB) provided with the sensor unit can effectively block the influence of the external magnetic force on the sensor unit. The magnetic shield water meter of claim 1
Further comprising a control unit for analyzing and transmitting the signal detected by the sensor unit,
The controller analyzes whether the rotational stop speed of the permanent magnet detected by the sensor unit indicates a sudden change out of the normal reference range and transmits it, thereby immediately detecting and notifying measurement disturbance caused by external magnetic force. Magnetic shielding water meter to prevent tampering.

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