JP3150355U7 - - Google Patents

Description

Flowmeter

The present invention relates to a flow meter, and more particularly to a flow meter that accurately displays a metered value measured mechanically in accordance with a flow rate in a non-contact manner using magnetism and displays it on a display unit.

Commonly used flow meters, such as water meters, are used to measure the amount of water consumed in homes and various buildings and to charge appropriate charges accordingly. Depending on whether it flows into the section, it is divided into a mechanical meter and an electronic meter.

First, the mechanical meter is configured so that the rotation of a rotating body arranged in the main body and rotating in accordance with the flow of fluid can be mechanically counted by a gear unit arranged in the counting unit. This has the advantage that it is relatively inexpensive and has few failures, but the amount of water used is measured by being embedded in the wall or floor of a house or building for metering the flow rate. It is not easy to check, and further, since the meter is counted mechanically, there is a disadvantage that it is not possible to display an accurate amount of water used.

In addition, the electronic meter detects the rotation of the rotating body with a sensor and displays it on the liquid crystal plate. This can be made compact by integrating the internal circuit of the counting unit. It has the advantages that the reliability of the value is high and stable, and that remote detection is possible, but it is expensive and often fails.

Recently, a measuring instrument using a substrate or a Hall sensor has been proposed for more accurate flow rate detection. Such a measuring instrument rotates a rotating body corresponding to a fluid flow. The amount of use is displayed by sensing and counting, or the amount of rotation is displayed by classifying the rotation value of the rotating body sensed by the Hall sensor by stage. However, there is a possibility that a measuring instrument using a substrate or hall sensor according to the conventional technology may be imbedded in a wall or floor, resulting in malfunction due to humidity or the like and not being able to accurately detect the rotation of the rotating body. And there is a wide range between the rotational speed of the rotation detection value and the rotation value displayed on the measuring instrument (that is, the measurement value). Therefore, there is a problem that the actual water consumption cannot be displayed accurately. Next, a conventional flow meter will be described with reference to FIG.

FIG. 1 is a diagram showing a general mechanical water meter. FIG. 1 is a view showing a water meter embedded in a floor of a house or various buildings.

As shown in FIG. 1, the mechanical meter 120 includes a first rotating body 122 that rotates according to the flow rate, and a second rotating body to a second rotating body that rotate stepwise according to the rotation of the first rotating body 122. 5 rotators 124, 126, 128, 130. In addition, the circumferential surfaces of the rotating bodies 122, 124, 126, 128, and 130 are provided with number pads on which numbers from 0 to 9 are displayed.

The mechanical meter 120 is embedded in the wall or bottom 100 as described above, and is displayed on the circumferential surface of the rotating bodies 122, 124, 126, 128, and 130 when checking the amount of water used. There is a problem that it is difficult to read out the numbers. Further, for easy reading of the numbers displayed on the circumferential surfaces of the rotating bodies 122, 124, 126, 128, 130, the numbers or the rotational speeds of the rotating bodies 122, 124, 126, 128, 130 are set. When the sensor senses and displays on the display unit, a malfunction of the sensor due to an external environmental factor (for example, humidity, etc.) may occur, which causes the sensor to rotate the rotating bodies 122, 124, 126, 128, and 130. Cannot be accurately sensed, and there is a problem that it is impossible to measure the reliable water consumption.

The present invention has been devised to solve the above-mentioned problems. The purpose of the present invention is to accurately detect the rotation of a rotating body that rotates in accordance with the flow rate in a non-contact manner using magnetism. It is an object of the present invention to provide a flow meter that can easily check a measured value by displaying it externally.

Another object of the present invention is to accurately detect the rotation of a rotating body that rotates in accordance with the flow rate by a non-contact method using magnetism and display it accurately to the decimal unit. To provide a total.

To achieve the above object , according to an embodiment of the present invention, a plurality of number pads that rotate according to a flow rate and are provided on a circumferential surface, and at least one of the plurality of number pads. A rotating body including a magnetic body positioned corresponding to a specific number pad; a plurality of conductors respectively corresponding to the plurality of number pads; and the plurality of conductors such that the plurality of conductors have different voltage values. A plurality of resistors connected to adjacent conductors in each of the plurality of holes, a plurality of hall sensors respectively corresponding to the plurality of conductors, and the magnetic sensor, when the magnetic body is adjacent to the one of the plurality of conductors. be commensurate with the voltage value of the conduction conductors by the Hall sensor, which is provided from the switching conductor of the sensing portion; bracts conductive (oN) by the sensing unit includes a switching conductor Controller calculates the rotation value of the rotating body by using a sensing value; and measuring instruments including a display unit for displaying the generated rotation value is obtained.

According to the present invention, the rotation of the rotating body due to the flow rate is accurately detected using magnetism, thereby eliminating variations between the rotating value of the rotating body and the measured value displayed on the measuring instrument, and accurate meter reading. In addition, it is possible to easily check the measured value of the mechanical meter embedded in the floor etc. from the outside by displaying the actual usage amount numerically via the external display unit. it can.

It is the figure which showed the general mechanical meter. It is the figure which showed schematically the measuring device by this invention. It is the figure which showed notionally the structure of the measuring instrument by 1st Example of this invention. It is the figure which showed schematically the structure of the measuring device by 1st Example of this invention. It is the figure which showed schematically the operating state of the measuring instrument by 1st Example of this invention. It is the figure which showed schematically the structure of the measuring device by 2nd Example of this invention. It is the figure which showed schematically the structure of the measuring device by 3rd Example of this invention. It is the figure which showed schematically the structure of the measuring device by 4th Example of this invention. FIG. 5 is a diagram schematically illustrating a structure of a sensing unit applied to third and fourth embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, only the parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted.

The present invention proposes a flow meter. Here, in the embodiments of the present invention to be described later, a water meter will be described as an example, but the meter according to the present invention can be applied to any meter for detecting the flow rate (for example, a gas meter). In addition, the present invention proposes a measuring instrument that accurately senses the rotation of a rotating body that rotates by the flow of fluid, and displays the sensed rotation sensing value with an accurate number so that it can be easily confirmed without error.

At this time, the measuring device according to the embodiment of the present invention accurately detects the rotation of the rotating body that rotates according to the flow rate by the Hall sensor using magnetism, and the rotation detection value detected by the Hall sensor has no error. It is displayed with an accurate number so that the user can easily confirm it. Accordingly, the measuring device according to the embodiment of the present invention is rotated in a non-contact manner by a Hall sensor using magnetism to prevent malfunction caused by external environmental factors such as humidity and inaccurate sensing caused by the malfunction. By detecting the rotation of the body and using the detected value detected by the Hall sensor to accurately display to the nearest decimal point, the number of rotations of the rotating body and the rotation value displayed on the measuring instrument (ie, the measured value) The actual actual usage is displayed with the error between and minimized.

Next, the measuring device according to the present invention will be described more specifically with reference to FIG. FIG. 2 is a view schematically showing a measuring instrument according to the present invention.

As shown in FIG. 2, the meter includes a mechanical meter 220 having a rotating body that rotates in accordance with the amount of water used, as described above with reference to FIG. 1, and the mechanical meter 220. A sensing unit 230 that senses a measurement value (that is, the number of revolutions of the rotating body provided in the mechanical meter), and a control that causes the display unit 250 to display the rotation value of the rotating body using the sensing value of the sensing unit 230. And a display unit 250 that displays the rotation value of the rotating body under the control of the control unit 240.

Here, each of the rotating bodies is provided with a number pad on which a number from 0 to 9 is written on the circumferential surface, and the mechanical meter 220 and the sensing unit 230 are dents formed inside the wall or the floor 200. It is installed by embedding in 210. That is, the sensing unit 230 is installed together with the mechanical meter 220. The control unit 240 may be installed in the recess 210 or outside the floor 200, and the display unit 250 is installed in a place where the user can easily check the amount of water used (for example, the outer wall surface). Is done.

Next, the structure of the measuring instrument according to the present invention will be described with reference to FIG. FIG. 3 is a diagram conceptually showing the structure of a measuring instrument according to the present invention.

As shown in FIG. 3, the flow meter according to the present invention has a predetermined magnetic field strength corresponding to a specific number pad of the rotating body in order to sense the rotation of the rotating body included in the mechanical meter. The first Hall sensor 231 and the second Hall sensor 231 ′ include a magnetic body 300, and the magnetic field value is detected by the first Hall sensor 231 and the second Hall sensor 231 ′, that is, the coupling portion, that is, the first coupling portion 233 and the second coupling. Transmitted to the unit 233 ′. Then, the coupling units 233 and 231 ′ transmit the magnetic field values transmitted from the hall sensors 231 and 231 ′ to the control unit 240, and the control unit 240 uses the magnetic field values to determine a measurement value corresponding to the flow rate (that is, The rotation value of the rotating body) is displayed on the display unit 250.

In the present embodiment, the sensing unit 230 includes a pair of hall sensors corresponding to each number pad of the rotating body, and the pair of hall sensors transmits the sensed magnetic field value to one coupling unit. Accordingly, when the first hall sensor 231 and the second hall sensor 231 ′ are hall sensors corresponding to the same number pad, the first coupling portion 233 and the second coupling portion 233 ′ are regarded as the same coupling portion. The magnetic body 300 is positioned corresponding to the two Hall sensors. Further, the magnetic body 300 corresponds to a specific number pad of the rotating body corresponding to the lowest unit number among the first rotating body 122 of FIG. 1 described above, that is, the rotating bodies 122, 124, 126, 128, and 130. Or corresponding to specific number pads of two or more rotating bodies including the first rotating body 122 among the rotating bodies 122, 124, 126, 128, 130. The sensing unit 230 is disposed so as to sense the rotation of the rotating body including the magnetic body 300.

FIG. 4 is a view schematically showing the structure of a measuring instrument according to the first embodiment of the present invention.

As shown in FIG. 4, the measuring instrument according to the first embodiment of the present invention includes a rotating body 400 that rotates according to a flow rate, a sensing unit 230 that senses the rotation of the rotating body 400, and the sensing unit 230. And a control unit 240 that displays the rotation value of the rotating body on the display unit 250 using the detected value.

The rotating body 400 has number pads 401,..., 410 on which numbers from 0 to 9 are written on the circumferential surface, and corresponds to a specific number pad, for example, 0 among the number pads 401,. A magnetic body 300 having a predetermined magnetic field strength corresponding to the number pad 410 is included. When the magnetic body 300 of the rotating body 400 is positioned correspondingly, the sensing unit 230 senses a magnetic sensor formed by the magnetic body 300, respectively, Hall sensors 421, ..., 440, and the respective hall sensors 421. ,..., 470, 470, and 470, and an output unit 480 that transmits the output values of the connectors 461, 470 to the controller 240 through an output line. . Further, the controller 240 displays the water usage amount on the display unit 250 using the sensed values sensed by the hall sensors 421,..., 440 transmitted via the output unit 480.

The rotating body 400 rotates according to the flow of fluid, and the rotation of the rotating body 400 causes the number pads 401,..., 410 and the magnetic body 300 provided therein to rotate together. At this time, the magnetic body 300 is positioned corresponding to any two of the hall sensors 421,. Accordingly, each Hall sensor disposed corresponding to the magnetic body 300 senses the magnetic field formed by the magnetic body 300 and transmits the detected magnetic field to the coupling portion, and the magnetic field transmitted to the coupling portion. The value is transmitted to the control unit 240 via the output line and output unit 480. In addition, the control unit 240 accurately calculates the rotation value of the rotating body 400 using the magnetic field value transmitted in this manner, and transmits this to the display unit 250.

Here, the pair of Hall sensors commonly connected to one coupling portion corresponds to any one of the number pads 401,..., 410 of the rotating body 400, thereby a pair of Hall sensors. A magnetic field of the same magnitude is formed between the magnetic body 300 and the same environment. In addition, when the pair of Hall sensors are respectively applied to one number pad, magnetic fields having different magnitudes by a predetermined value in the same environment are generated between the Hall sensors corresponding to different coupling portions and the magnetic body 300. It is formed. That is, when the magnetic body 300 is correspondingly positioned in the same environment, a pair of Hall sensors corresponding to the same coupling portion transmits the same magnetic field value to the coupling portion, and each Hall sensor corresponding to a different coupling portion is When the magnetic bodies 300 are correspondingly positioned in the same environment, magnetic field values having different magnitudes by a predetermined value are transmitted to the respective coupling portions. For reference, in the embodiment of the present invention, the sensing unit 230 is described as including a pair of hall sensors corresponding to one number pad, but may include one hall sensor corresponding to one number pad.

Here, when the magnetic body 300 is positioned corresponding to a hall sensor corresponding to the same coupling part, the control unit 240 receives a magnetic field value from one coupling part and displays a number corresponding to the magnetic field value. . At this time, if the relative values of the magnetic field values corresponding to the numbers of the number pads 401,. The magnetic field value corresponding to each number shown in Table 1 below can be changed by the user, and not only the range of the magnetic field value described later but also the numerical display operation based on the magnetic field value sensed and transmitted by the Hall sensor can be changed by the user. It is.

Each of the hall sensors 421,..., 440 of the sensing unit 230 corresponds to each number from 0 to 9, and when the magnetic body 300 is positioned corresponding to each of the hall sensors 421,. The magnetic field value is sensed within the range of the magnetic field value of the number corresponding to and transmitted to the coupling portion. More specifically, the pair of Hall sensors 439 and 440 corresponding to 0 senses and transmits a magnetic field value within a magnetic field value range of 0 to 20 to the coupling unit 470. In the case of corresponding positions, 10 magnetic field values are transmitted to the coupling unit 470, and then the control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 0. A pair of Hall sensors 421 and 422 corresponding to 1 senses a magnetic field value within a magnetic field value range of 20 to 40 and transmits it to the coupling portion 461. When the magnetic body 300 is positioned correspondingly, 30 is detected. The control unit 240 displays 1 as the rotation value of the rotating body 400 corresponding to the flow rate.

A pair of Hall sensors 423 and 424 corresponding to 2 senses a magnetic field value within a magnetic field value range of 40 to 60 and transmits it to the coupling part 462. When the magnetic body 300 is positioned correspondingly, 50 The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate by 2. A pair of Hall sensors 425 and 426 corresponding to 3 senses a magnetic field value within a magnetic field value range of 60 to 80 and transmits it to the coupling unit 463. When the magnetic body 300 is positioned correspondingly, 70 magnetic fields are detected. The value is transmitted to the coupling unit 463, and the control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 3. Further, a pair of Hall sensors 427 and 428 corresponding to 4 senses and transmits a magnetic field value within a magnetic field value range of 80 to 100 to the coupling unit 464, and when the magnetic body 300 is positioned correspondingly, The magnetic field value of 90 is transmitted to the coupling unit 464, and the control unit 240 displays 4 as the rotation value of the rotating body 400 corresponding to the flow rate.

Further, the pair of Hall sensors 429 and 430 corresponding to 5 senses a magnetic field value within a magnetic field value range of 100 to 120 and transmits it to the coupling unit 465, and when the magnetic body 300 is positioned correspondingly, The magnetic field value of 110 is transmitted to the coupling unit 465, and the control unit 240 displays 5 as the rotation value of the rotating body 400 corresponding to the flow rate. A pair of Hall sensors 431 and 432 corresponding to 6 senses a magnetic field value within a magnetic field value range of 120 to 140 and transmits the magnetic field value to the coupling unit 466. The magnetic field value is transmitted to the coupling unit 466, and the control unit 240 displays 6 as the rotation value of the rotating body 400 corresponding to the flow rate. On the other hand, the pair of Hall sensors 433 and 434 corresponding to 7 sense magnetic field values within the magnetic field value range of 140 to 160 and transmit them to the coupling part 467, and when the magnetic body 300 is positioned correspondingly, The magnetic field value of 150 is transmitted to the coupling unit 467, and the control unit 240 displays 7 as the rotation value of the rotating body 400 corresponding to the flow rate.

A pair of Hall sensors 435 and 436 corresponding to 8 senses and transmits a magnetic field value within a magnetic field value range of 160 to 180 to the coupling unit 468, and when the magnetic body 300 is positioned correspondingly, The magnetic field value of 170 is transmitted to the coupling unit 468, and the control unit 240 displays 8 as the rotation value of the rotating body 400 corresponding to the flow rate. A pair of Hall sensors 437 and 438 corresponding to 9 senses a magnetic field value within a magnetic field value range of 180 to 200 and transmits the magnetic field value to the coupling unit 469. The magnetic field value is transmitted to the coupling unit 469, and the control unit 240 displays 9 as the rotation value of the rotating body 400 corresponding to the flow rate.

Further, when the magnetic body 300 is positioned corresponding to each hall sensor corresponding to a different number, for example, when the magnetic body 300 is positioned between the hall sensors 427 and 428 corresponding to 4 and the hall sensors 429 and 430 corresponding to 5. Hall sensor 428 corresponding to 4 transmits a magnetic field value within a magnetic field value range of 90 to 100 to the coupling unit 464, and Hall sensor 429 corresponding to 5 transmits a magnetic field value within a magnetic field value range of 100 to 110 to the coupling unit 465. introduce. Such a magnetic field value is transmitted to the control unit 240, and the control unit 240 can display the numerical value up to the decimal point using the magnetic field value. For example, if the Hall sensor 428 corresponding to 4 senses and transmits a magnetic field value of 95 and the Hall sensor 429 corresponding to 5 detects and transmits a magnetic field value of 105, the controller 240 rotates the rotating body 400 corresponding to the flow rate. The value is displayed as 4.5. If each Hall sensor 421,..., 440 senses a magnetic field value outside the threshold value, for example, the Hall sensor 428 corresponding to 4 senses and transmits the magnetic field value 112, or the Hall sensor 429 corresponding to 5 detects the magnetic field value. If the magnetic field value of 97 is sensed and transmitted, the controller 240 confirms that the magnetic field value sensed and transmitted by the Hall sensors 428 and 429 is an error value and displays an error on the display unit. Become.

In addition, each Hall sensor which shows a different magnetic field value corresponding to each number pad mentioned above is realized by using different resistance values and the like even if elements having the same characteristics are used. Can be done.

FIG. 5 is a view schematically showing an operating state of the measuring instrument according to the first embodiment of the present invention.

As shown in FIG. 5, the rotating body 400 rotates according to the flow of the fluid, and the magnetic body 300 having a predetermined magnetic field strength provided in the 0 number pad 410 corresponds to the 4 number pad. When positioned corresponding to the sensors 427 and 428, the pair of Hall sensors 427 and 428 transmits 90 magnetic field values to the coupling unit 464 as described above. Then, the coupling unit 464 transmits 90 magnetic field values to the control unit 240, and the control unit 240 controls the display unit 250 to display 4 corresponding to 90 magnetic field values. Accordingly, the display unit 250 displays the rotation value of the rotating body 400 as 4.

Further, when the rotating body 400 rotates in accordance with the flow rate and the magnetic body 300 is positioned corresponding to the Hall sensors 428 and 429 corresponding to 4 and 5, the Hall sensor 428 corresponding to 4 has a magnetic field value range of 90-100. The Hall sensor 429 corresponding to 5 transmits a magnetic field value within a magnetic field value range of 100 to 110 to the coupling unit 465. Such magnetic field values are respectively transmitted to the control unit 240, and the control unit 240 uses these magnetic field values to display numbers up to the decimal point. For example, when the Hall sensor 428 corresponding to 4 senses and transmits a magnetic field value of 95, and the Hall sensor 429 corresponding to 5 senses and transmits a magnetic field value of 105, the control unit 240 determines the rotation value of the rotating body 400 corresponding to the flow rate. Display with 4.5.

As described above, the measuring instrument according to the first embodiment of the present invention can accurately detect the rotation of the rotating body 400 in a non-contact manner by the Hall sensor using magnetism, and in particular, 10 pairs corresponding to each number from 0 to 9. The hall sensor can accurately display the rotation value in decimal units.

On the other hand, 10 Hall sensors or 10 pairs of Hall sensors corresponding to each number pad from 0 to 9 may be implemented so as to exhibit the same magnetic field characteristics using elements having the same characteristics. However, in this case, the maximum magnetic field values appearing when the magnetic body is located closest to the Hall sensor are equal to each other. By implementing so that the Hall sensor corresponding to each number pad can be identified, the rotation value of the rotating body can be calculated using the magnetic field value provided from each Hall sensor.

At this time, the control unit can compare the magnetic field values provided by two or more adjacent hall sensors with each other and calculate the rotation value of the rotating body to the decimal unit. When the magnetic field values provided by the sensors are the same, it can be determined that the magnetic body is located at the center of the two Hall sensors, and in the three adjacent Hall sensors, the two Hall sensors on both sides are If the magnetic field values to be provided are the same and the magnetic field value provided by the central hall sensor is larger than that, it can be determined that the magnetic body is closest to the central hall sensor. As a result, the control unit can accurately calculate the rotation value of the rotating body up to the decimal point by comparing the relative magnitudes of the magnetic field values provided by the two Hall sensors.

Next, the structure of the measuring instrument according to the second embodiment of the present invention will be described in more detail with reference to FIG. FIG. 6 is a view schematically showing the structure of a measuring instrument according to a second embodiment of the present invention.

As shown in FIG. 6, the measuring device according to the second embodiment of the present invention includes a rotating body 400 that rotates according to a flow rate, a sensing unit 230 that senses the rotation of the rotating body 400, and the sensing unit 230. And a control unit 240 that causes the display unit 250 to display the rotation value of the rotating body according to the flow rate using the detected value.

The rotary body 400 has number pads 401,..., 410 on which numbers from 0 to 9 are written on the circumferential surface, and a specific number pad among the number pads 401,. A magnetic body 300 having a predetermined magnetic field strength corresponding to 410 is included. The sensing unit 230 connects the conductors 541,..., 550 corresponding to the number pads 401,..., 410 of the rotator 400 and the conductors 541,. .., 569 having the resistance values of the rotator 400 and the magnetic body 300 of the rotating body 400 are positioned corresponding to each other, and switching with the conductors 541,. , 530 for performing a switching function with the conductor 580, and a switching conductor 580 for transmitting the magnetic field value to the control unit 240 by switching of the hall sensors 521,. .

Here, each of the conductors 541,..., 550 has a voltage corresponding to a number corresponding to itself. For example, when a voltage of 9V is applied to the conductor 549 corresponding to 9, the conductor 548 corresponding to 8 corresponds to 8V, the conductor 547 corresponding to 7 corresponds to 7V, the conductor 546 corresponding to 6 corresponds to 6V, and the conductor 545 corresponding to 5 corresponds to 5V corresponding to 4. The conductor 544 has 4V, the conductor 543 corresponding to 3 has 3V, the conductor 542 corresponding to 2 has 2V, the conductor 541 corresponding to 1 has 1V, and the conductor 550 corresponding to 0 has 0V or 10V.

The rotating body 400 rotates according to the flow of fluid, and the rotation of the rotating body 400 causes the number pads 401,..., 410 provided on the circumferential surface thereof and the magnetic body 300 to rotate together. . At this time, the magnetic body 300 is positioned corresponding to the hall sensor connected to the conductor corresponding to the specific numeral (that is, the hall sensor corresponding to the specific numeral) and the switching conductor 580, so that the conductor corresponding to the specific numeral is A magnetic field having a predetermined magnitude is formed between the magnetic body 300 and the Hall sensor by the voltage that the Hall sensor senses. Further, the Hall sensor and the switching conductor 580 are turned on by the magnetic field, and the magnetic field value sensed by the Hall sensor is transmitted to the control unit 240 through the switching conductor 580. Next, the control unit 240 accurately calculates the rotation value of the rotating body 400 corresponding to the flow rate using the magnetic field value and transmits the rotation value to the display unit 250. At this time, a predetermined circuit is formed in the sensing unit 230 according to the position of the magnetic body 300.

The conductors 541,..., 550 have different voltages corresponding to the number pads 401,..., 410 of the rotating body 400, so that the magnetic body 300 and the hall sensors 521,. A magnetic field having a magnitude corresponding to each of the number pads 401,..., 410 is formed, and each Hall sensor 521,..., 530 has a magnetic field value formed in this way, that is, a magnetic field value corresponding to the number pads 401,. Is transmitted to the control unit 240 via the switching conductor 580. At this time, when the magnetic body 300 is positioned corresponding to one Hall sensor and the switching conductor 580, the controller 240 receives a magnetic field value from one Hall sensor and displays a number corresponding to the magnetic field value. To. For reference, if the relative values of the magnetic field values corresponding to the numbers on the number pads 401,..., 410 are digitized, they can be shown as in Table 1 above.

Each of the hall sensors 521,..., 530 of the sensing unit 230 corresponds to each number from 0 to 9 according to the voltage of each of the conductors 541,. When positioned corresponding to the sensors 521,..., 530 and the switching conductor 580, the magnetic field value is sensed within the numerical magnetic field value range corresponding to the sensor 521,. More specifically, the Hall sensor 530 corresponding to 0 senses a magnetic field value within a magnetic field value range of 0 to 20 by the conductor 550 having 0 V, and when the magnetic body 300 is located correspondingly, the magnetic field of 10 is 10 fields. The value is transmitted to the control unit 240, and the control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as zero. Further, the Hall sensor 521 corresponding to 1 senses a magnetic field value within a magnetic field value range of 20 to 40 by a conductor 541 having 1 V, and when the magnetic body 300 is positioned correspondingly, the magnetic field value of 30 is set to the control unit 240. The control unit 240 displays 1 as the rotation value of the rotator 400 corresponding to the flow rate.

Further, the Hall sensor 522 corresponding to 2 senses a magnetic field value within a magnetic field value range of 40 to 60 by a conductor 542 having 2 V, and when the magnetic body 300 is located correspondingly, the magnetic field value of 50 is set to the control unit 240. The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 2. Hall sensor 523 corresponding to 3 senses a magnetic field value within a magnetic field value range of 60 to 80 by a conductor 543 having 3 V, and transmits the magnetic field value of 70 to the control unit 240 when the magnetic body 300 is located correspondingly. The controller 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 3. In addition, the Hall sensor 524 corresponding to 4 senses a magnetic field value within a magnetic field value range of 80 to 100 by a conductor 544 having 4V, and when the magnetic body 300 is located correspondingly, the magnetic field value of 90 is controlled by the control unit. The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 4.

The hall sensor 525 corresponding to 5 senses a magnetic field value within a magnetic field value range of 100 to 120 by a conductor 545 having 5 V, and when the magnetic body 300 is located correspondingly, the magnetic field value of 110 is set to the control unit 240. The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 5. Hall sensor 526 corresponding to 6 senses a magnetic field value within a magnetic field value range of 120 to 140 by conductor 546 having 6V, and transmits 130 magnetic field values to control unit 240 when magnetic body 300 is located correspondingly. The controller 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 6. The hall sensor 527 corresponding to 7 senses a magnetic field value within a magnetic field value range of 140 to 160 by a conductor 547 having 7V, and when the magnetic body 300 is located correspondingly, the magnetic field value of 150 is set to the controller 240. The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 7.

The hall sensor 528 corresponding to 8 senses a magnetic field value within a magnetic field value range of 160 to 180 by a conductor 548 having 8V, and when the magnetic body 300 is located correspondingly, the magnetic field value of 170 is set to the control unit 240. The control unit 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 8. Hall sensor 529 corresponding to 9 senses a magnetic field value within a magnetic field value range of 180 to 200 by a conductor 549 having 9 V, and transmits the magnetic field value of 190 to the control unit 240 when the magnetic body 300 is located correspondingly. The controller 240 displays the rotation value of the rotating body 400 corresponding to the flow rate as 9.

Further, when the magnetic body 300 is positioned corresponding to the hall sensors and switching conductors 580 corresponding to different numbers, for example, the magnetic body 300 corresponds to the hall sensors 524 and 525 and switching conductors 580 corresponding to 4 and 5. When positioned, the Hall sensor 524 corresponding to 4 transmits a magnetic field value within a magnetic field value range of 90 to 100 to the control unit 240, and the Hall sensor 525 corresponding to 5 transmits a magnetic field value within a magnetic field value range of 100 to 110 to the control unit. 240. Accordingly, the control unit 240 can display numbers up to the decimal point using the magnetic field value. For example, when the Hall sensor 524 corresponding to 4 senses and transmits a magnetic field value of 95 and the Hall sensor 525 corresponding to 5 senses and transmits a magnetic field value of 105, the control unit 240 rotates the rotating body 400 corresponding to the flow rate. The value is displayed as 4.5. If each Hall sensor 521,..., 530 detects a magnetic field value deviating from the threshold value, for example, the Hall sensor 524 corresponding to 4 detects and transmits the magnetic field value 112, or the Hall sensor 525 corresponding to 5 corresponds to the Hall sensor 525. If the magnetic field value of 97 is sensed and transmitted, the control unit 240 confirms that the magnetic field value sensed and transmitted by the hall sensors 524 and 525 is an error value, and then displays an error on the display unit of the rotating body 400. Is displayed.

As described above, the measuring device according to the second embodiment of the present invention can accurately detect the rotation of the rotating body 400 in a non-contact manner through the Hall sensor using magnetism. Through the hall sensor that corresponds to a number, even a rotation value in decimal units can be displayed accurately.

Hereinafter, the structure of the measuring instrument according to the third embodiment of the present invention will be described in more detail with reference to FIG. FIG. 7 is a view schematically showing the structure of a measuring instrument according to a third embodiment of the present invention.

As shown in FIG. 7, the measuring device according to the third embodiment of the present invention includes a magnetic body 300 that rotates the same number in conjunction with a rotating body that rotates according to the flow rate, and a rotation value of the magnetic body 300. A sensing unit 230 that senses in a non-contact manner, and a control unit 240 that causes the display unit 250 to display the rotation value of the rotating body according to the flow rate using the sensing value of the sensing unit 230. However, the magnetic body 300 is located away from the sensing unit 230.

The magnetic body 300 includes an S pole portion 310 and an N pole portion 320, and has number pads 401,..., 410 on which numbers from 0 to 9 are written on the circumferential surface. Here, the number pads 401,..., 410 existing on the circumferential surface of the magnetic body 300 are the numbers written on the circumferential surface of the rotating bodies 122, 124, 126, 128, 130 as described above with reference to FIG. Each corresponds to the same number. Of the number pads present on the circumferential surface of the magnetic body 300, a specific number pad, for example, a number pad 410 corresponding to 0, is positioned at a reference point when the rotation value of the magnetic body 300 is detected. On the other hand, the reference point is preferably a junction point between the S pole part 310 and the N pole part 320.

The sensing unit 230 senses a rotational value of the magnetic body 300 that rotates the same number in conjunction with the rotating body, and a pin 234 that transmits the rotational value of the magnetic body sensed by the chip 232 to the control unit 240. Including. At this time, the sensing unit 230 senses the rotation value of the magnetic body 300 in a non-contact manner by separating the magnetic body 300 and corresponding positions. The chip 232 measures a rotation angle of a reference point where a number pad 410 corresponding to a specific number, for example, 0, is positioned, and senses the rotation value of the magnetic body 300 even to a value in decimals. In this case, the chip 232 may be a 64-pulse phase difference output (Quadrature) encoder per rotation or a magnetic rotary encoder with an index output, for example, an AS5035 chip manufactured by Austrian Microsystems. Can be mentioned. A specific method in which the chip 232 senses the rotation value of the magnetic body 300 will be described later with reference to FIG.

The controller 240 transmits the rotation value of the magnetic body 300 from the sensing unit 230 to a value of a decimal unit, and displays the rotation value of the magnetic body 300 on the display unit 250 using the transmitted rotation value of the magnetic body 300. To do. That is, the control unit 240 displays the amount of water used on the display unit 250 up to the decimal point.

Next, referring to FIG. 8, the structure of a measuring instrument according to a fourth embodiment of the present invention will be described. FIG. 8 is a view schematically showing the structure of a measuring instrument according to a fourth embodiment of the present invention.

As shown in FIG. 8, the measuring device according to the fourth embodiment of the present invention includes a rotating body 400 that rotates according to a flow rate, a magnetic body 300 that rotates the same number in conjunction with the rotating body 400, and A sensing unit 230 that senses the rotational value of the magnetic body 300 in a non-contact manner, and a control that displays the rotational value of the rotating body corresponding to the flow rate on the display unit 250 using the rotational value sensed by the sensing unit 230. Part 240. However, the magnetic body 300 is located away from the sensing unit 230. In the fourth embodiment of the present invention, the case where the magnetic body 300 is a columnar magnet will be described. However, other forms such as a bar-shaped magnet may be used.

The rotating body 400 includes number pads 401,..., 410 on which numbers from 0 to 9 are written on a circumferential surface, and the magnetic body 300 includes an S pole portion 310 and an N pole portion 320. Here, the number pads 401,..., 410 existing on the circumferential surface of the rotating body 400 are written on the circumferential surfaces of the rotating bodies 122, 124, 126, 128, 130 as described above with reference to FIG. Each corresponds to a number that is equivalent to a number. Among the number pads 401,..., 410 existing on the circumferential surface of the rotating body 400, a specific number pad, for example, the number pad 410 corresponding to 0, serves as a reference point when detecting the rotation value of the magnetic body 300. The reference point is preferably a junction point between the S pole part 310 and the N pole part 320.

The sensing unit 230 senses the rotation value of the magnetic body 300 rotated by the same number as the rotating body 400 rotating according to the flow rate, and the control unit 240 determines the rotation value of the magnetic body sensed by the chip 232. And a pin 234 for transmitting to the terminal. At this time, the sensing unit 230 senses the rotation value of the magnetic body 300 in a non-contact manner by separating the magnetic body 300 and corresponding positions. The chip 232 measures the rotation angle of a reference point where a specific number pad, for example, the number pad 410 corresponding to 0, is located, and detects the rotation value of the magnetic body 300 to a value below the decimal point. A specific method in which the chip 232 senses the rotation value of the magnetic body 300 will be described later with reference to FIG.

The controller 240 is transmitted from the sensing unit 230 to a numerical value after the decimal point with respect to the rotation value of the magnetic body 300, and the display unit 250 uses the transmitted rotation value of the magnetic body 300 to a unit after the decimal point. To display. That is, the control unit 240 displays the water usage amount on the display unit 250 to a value below the decimal point.

Hereinafter, the operation of the sensing unit 230 sensing the rotation value of the magnetic body 300 in the measuring instrument according to the third and fourth embodiments of the present invention will be described in detail with reference to FIG.

FIG. 9 is a view schematically showing the structure of a sensing unit applied to the third and fourth embodiments of the present invention.

As shown in FIG. 9, the sensing unit 230 includes a chip 232 that senses the rotation value of the magnetic body 300, and a pin 234 that transmits the rotation value of the magnetic body 300 sensed by the chip 232 to the control unit 240. Including. The chip 232 includes Hall sensors 236, 236-1, 238, and 238-1 that sense a rotation angle of the magnetic body 300 with reference to a reference point of the magnetic body 300. Here, the first and second hall sensors 236 and 236-1 are located on the x-axis of the chip 232, and the third and fourth hall sensors 238 and 238-1 are located on the y-axis of the chip 232. .

When the reference point of the magnetic body 300 is positioned corresponding to a predetermined region 235 of the chip 232, the first and second Hall sensors 236 and 236-1 detect the rotation value of the magnetic body 300 based on the x axis. The third and fourth Hall sensors 238 and 238-1 sense the rotation value of the magnetic body 300 with respect to the y axis. More specifically, the first and second Hall sensors 236 and 236-1 measure the angle of rotation of the magnetic body 300 by measuring the angle between the x-axis and the reference point of the magnetic body 300. The third and fourth Hall sensors 238 and 238-1 measure the rotation angle of the magnetic body 300 by measuring the angle between the y-axis and the reference point of the magnetic body 300. On the other hand, the reference point is a junction point between the S pole portion 310 and the N pole portion 320 of the magnetic body 300 in the above-described example, and a number pad 410 corresponding to 0 is located here.

When the Hall sensors 236, 236-1, 238, and 238-1 measure the rotation angle as described above, the chip 232 calculates the rotation value of the magnetic body 300 using, for example, Equation 1 below.

In Equation 1, θ represents a rotation value of the magnetic body 300, X1 represents an angle measured by the first Hall sensor 236, and X2 represents an angle measured by the second Hall sensor 236-1. , Y1 means the angle measured by the third hall sensor 238, and Y2 means the angle measured by the fourth hall sensor 238-1.

At this time, when the number pad 410 corresponding to 0 corresponding to the rotation of the magnetic body 300 is positioned on the first Hall sensor 236 and the reference point is positioned on the x-axis, the chip 232 is rotated. Is detected by 0 and transmitted to the control unit 240 via the pin 234. When the magnetic body 300 rotates, the chip 232 similarly measures the rotation angle of the magnetic body 300 using the Hall sensors 236, 236-1, 238, and 238-1, thereby reducing the rotation value of the magnetic body 300 to the decimal point. Is transmitted to the control unit 240 through the pin 234. Thus, the control unit 240 displays the rotation value of the magnetic body 300 that rotates the same number as the rotation body on the display unit 250 up to the decimal point, thereby accurately displaying the rotation value of the rotation body corresponding to the flow rate in numbers. To do.

As described above, the measuring devices according to the third and fourth embodiments of the present invention can accurately detect the rotation of the rotating body in a non-contact manner through the magnetic body 300 and the sensing unit 230, and are particularly equivalent to the rotating body. By measuring the rotation angle of the magnetic body 300 having the number of rotations, it is possible to accurately display the rotation value in decimal units.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art to which the present invention belongs can be implemented in various other forms without changing the technical idea and essential features of the present invention. It will be understood that this can be done. Further, the above-described embodiments are merely illustrative, and the present invention is not limited thereby.

The scope of the present invention is defined by the appended utility model registration request rather than the above detailed description, and is derived from the meaning and scope of the utility model registration request and its equivalent concept. It should be understood that all modified or modified forms are also included in the scope of the present invention.

According to the present invention, it is possible to prevent malfunction of a measuring instrument due to external environmental factors such as humidity by detecting the rotation of a rotating body using magnetism, and easily replace an existing measuring instrument at low cost. be able to.

220 Mechanical meter 230 Sensing unit 231, 231 ′ Hall sensor 233, 233 ′ Coupling unit 240 Control unit 250 Display unit 300 Magnetic body

Claims (1)

In the measuring instrument,
A rotating body that rotates in accordance with a flow rate and includes a plurality of number pads provided on a circumferential surface, and a magnetic body that is positioned corresponding to at least one specific number pad among the plurality of number pads. A plurality of conductors respectively corresponding to a plurality of number pads, a plurality of resistors connected to adjacent conductors in each of the plurality of conductors such that the plurality of conductors exhibit different voltage values, and the plurality of conductors A sensing unit including a plurality of Hall sensors respectively corresponding to conductors and a switching conductor that is electrically connected (turned on) to any one of the plurality of conductors by the Hall sensor when the magnetic body is adjacent to the sensing unit. control unit and the calculating the rotation value of the rotating body by using a sensing value corresponding to the voltage value of the conduction conductors by the Hall sensor which is provided from the conductor Meter including a display unit for displaying the made the rotation value.