CN211904273U - Anti-interference low-power consumption antimagnetic metering sampling device for water/gas meter - Google Patents
Anti-interference low-power consumption antimagnetic metering sampling device for water/gas meter Download PDFInfo
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- CN211904273U CN211904273U CN202020940535.8U CN202020940535U CN211904273U CN 211904273 U CN211904273 U CN 211904273U CN 202020940535 U CN202020940535 U CN 202020940535U CN 211904273 U CN211904273 U CN 211904273U
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Abstract
The utility model relates to a water/gas meter is with anti-interference low-power consumption antimagnetic measurement sampling device, including rotary disk and antimagnetic measurement detection module. A metal film is arranged on the rotating disc; the antimagnetic metering detection module is positioned above the rotating disk and comprises an induction coil layer, a driving coil layer and an element layer; the element layer comprises an MCU, a phase inverter and a comparator, wherein the input end of the phase inverter is connected with the output end of the MCU; the driving coil layer comprises a driving coil D, and the input end of the driving coil D is connected with the output end of the inverter; the induction coil has threely, and induction coil includes induction coil A, induction coil B and induction coil C, and induction coil A, induction coil B and induction coil C's input all is connected with drive coil D output, and induction coil A, induction coil B and induction coil C's output all is connected with the input of comparator, and the output of comparator is connected to MCU. The utility model discloses can accurately acquire and rotate number of turns, rotation direction.
Description
Technical Field
The application relates to the technical field of measurement control, in particular to an anti-interference low-power consumption antimagnetic metering sampling device for a water/gas meter.
Background
The electromechanical conversion sampling principle of the intelligent flow meter is that a rotating permanent magnet is utilized to trigger sensitive elements such as a reed switch, a Hall and the like, and a mechanical rotation signal is converted into an electric pulse signal, so that the intelligent metering of the meter is realized. The sampling mode is susceptible to magnetic field interference, and in severe cases, metering errors can be caused.
SUMMERY OF THE UTILITY MODEL
The application provides a water/gas table is with anti-interference low-power consumption antimagnetic measurement sampling device to solve the problem that the sampling mode receives magnetic field interference influence easily among the prior art.
The technical scheme adopted by the application is as follows:
the utility model provides a water/gas meter is with anti-interference low-power consumption antimagnetic measurement sampling device, include:
the upper surface of the rotating disc is provided with a metal film;
the antimagnetic metering detection module is positioned above the rotating disc and sequentially comprises an induction coil layer, a driving coil layer and an element layer from bottom to top; the element layer comprises an MCU, a phase inverter and a comparator, wherein the input end of the phase inverter is connected with the output end of the MCU; the driving coil layer comprises a driving coil D, and the input end of the driving coil D is connected with the output end of the inverter; the number of the induction coils is at least three, the induction coils comprise an induction coil A, an induction coil B and an induction coil C, the input ends of the induction coil A, the induction coil B and the induction coil C are all connected with the output end of the driving coil D, the output ends of the induction coil A, the induction coil B and the induction coil C are all connected with the input end of the comparator, and the output end of the comparator is connected to the MCU.
Further, a shielding layer is further included, and the shielding layer is located between the element layer and the driving coil layer.
The driving coil D driving circuit further comprises a buffer, wherein the input end of the buffer is connected with the output end of the phase inverter, and the output end of the buffer is connected with the input end of the driving coil D.
Furthermore, the MCU comprises a pulse processing unit and a capacitor which are connected, the pulse processing unit is connected with the inverter, and the capacitor is connected with the buffer.
And the output ends of the induction coil A, the induction coil B and the induction coil C are connected with the input end of the signal amplifier, and the output end of the signal amplifier is connected with the input end of the comparator.
Furthermore, the signal amplifier also comprises a filter, wherein the input end of the filter is connected with the output end of the signal amplifier, and the output end of the filter is connected with the input end of the comparator.
Further, the metal film is a damping metal film, and the metal film is circular.
Further, the sizes of the induction coil A, the induction coil B and the induction coil C are the same, and the sizes of the induction coil A, the induction coil B and the induction coil C are the same as the size of the metal film.
Further, the induction coil A, the induction coil B and the induction coil C enclose a triangular shape.
Further, the driving coil D has a triangular shape.
The technical scheme of the application has the following beneficial effects:
the utility model discloses a water/gas meter is with anti-interference low-power consumption antimagnetic measurement sampling device uses three induction coil, can accurately acquire the number of turns of rotation, rotation direction; the coil is driven by sharp pulses, so that the energy is more concentrated, and the anti-interference performance is stronger; the metering detection mode adopts a short-time multi-pulse mode for driving, and metering is accurate and reliable. In most of the running time, the single chip microcomputer, the driving circuit, the induction signal processing circuit and the comparator are all in a dormant state, and the low power consumption characteristic of the device is ensured.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an anti-interference low-power consumption antimagnetic metering sampling device for a water/gas meter according to an embodiment of the present invention;
FIG. 2 is a top view of the turntable of FIG. 1;
FIG. 3 is a schematic flow diagram of the non-magnetic metering module of FIG. 1;
FIG. 4 is a diagram of the relationship of the induction coil layer and the drive coil layer of FIG. 3;
FIG. 5 is a graph of the output signal when there is no metal wafer under the induction coil A, B, C;
FIG. 6 is a diagram of the output signal when the induction coil A is shielded by the metal wafer;
FIG. 7 is a graph of the output signal when the metal wafer is under the induction coil B;
FIG. 8 is a diagram of the output signal when the metal sheet is rotated below the induction coil C;
fig. 9 is a logic diagram obtained when a disk covering a portion of a metal sheet is rotated.
Wherein, 1-rotating disc; 2-a rotating shaft; 3-antimagnetic measurement detection module;
11-a metal film;
31-drive coil D; 32-induction coil a; 33-induction coil B; 34-induction coil C.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
See fig. 1-9.
The application provides a pair of water/gas table is with anti-interference low-power consumption antimagnetic measurement sampling device, its characterized in that includes: the device comprises a rotating shaft 2, a rotating disk 1 and an antimagnetic metering detection module 3.
Specifically, the method comprises the following steps:
one end of the rotating shaft 2 is connected to the middle of the lower surface of the rotating disc 1, the other end of the rotating shaft 2 is connected with the driving unit, the driving unit is located in a flow channel of the water meter, and the driving unit is driven to rotate by fluid when water flows from an inlet to an outlet.
The upper surface of the rotating disc 1 is provided with a metal film 11;
the antimagnetic metering detection module 3 is positioned right above the rotating disk 1, and the antimagnetic metering detection module 3 sequentially comprises an induction coil layer, a driving coil layer, a shielding layer and an element layer from bottom to top; the element layer comprises an MCU, an inverter, a comparator, a buffer, a filter and a signal amplifier, the driving coil layer comprises a driving coil D31, the number of the induction coils is at least three, and the induction coils comprise an induction coil A32, an induction coil B33 and an induction coil C34;
the input end of the phase inverter is connected with the output end of the MCU, and the input end of the buffer is connected with the output end of the phase inverter; the output end of the buffer is connected with the input end of the driving coil D31; the input ends of the induction coil A32, the induction coil B33 and the induction coil C34 are all connected with the output end of the driving coil D31, the output ends of the induction coil A32, the induction coil B33 and the induction coil C34 are all connected with the input end of a signal amplifier, the input end of a filter is connected with the output end of the signal amplifier, the output end of the filter is connected with the input end of the comparator, and the output end of the comparator is connected to the MCU.
The MCU comprises a pulse processing unit and a capacitor which are connected, the pulse processing unit is connected with the phase inverter, and the capacitor is connected with the buffer.
The metal film 11 is a damping metal film 11, and the metal film 11 is circular.
The rotating disc 1 is spaced from the antimagnetic metering sampling device by a certain distance (about 1 cm). In this embodiment, glass is placed between the rotating disc 1 and the antimagnetic metering detection module 3, and certainly, non-conductive materials such as plastic can be disposed or filled in the glass, which is not described herein.
The antimagnetic measurement detection module 3 is a four-layer printed board, and the four-layer printed board sequentially comprises an element layer, a shielding layer, a driving coil layer and an induction coil layer from top to bottom. The shielding layer is a ground signal, the area of the shielding layer is equal to or slightly larger than that of the driving coil, the shielding layer well isolates the interference of the coil layer on the component layer, and meanwhile, the interference of an external signal on the induction coil is also isolated. The driving coil layer is arranged in the PCB, the driving coil takes the axis of the rotating disk 1 as the outer center to be wound in an outer triangular area, the coil is not wound in the driving coil layer, and the inner ring of the wound coil does not exceed the central point of the induction coil. The induction coils are 3 and all triangular, the sizes of the induction coil A32, the induction coil B33 and the induction coil C34 are the same, the winding directions are the same, the induction coil A32, the induction coil B33 and the induction coil C34 enclose a triangular shape, and each coil occupies an included angle of 120 degrees. The driving coil D31 is triangular, and the triangle formed by the three coils of the induction coil A32, the induction coil B33 and the induction coil C34 is the same as the triangle formed by the driving coil. The driving coil is partially overlapped with the induction coil, and the overlapped part should not exceed the central line outlet position of the induction coil.
The circuit part comprises a driving circuit, a PCB coil and a signal processing circuit. The driving circuit comprises a pulse generator (MCU generation), a pulse processor, a buffer and a driving coil. The signal processing circuit mainly comprises an induction coil, a high-frequency amplifier, a signal comparator and an MCU.
The PCB coil includes a driving coil D31, an induction coil a32, an induction coil B33, and an induction coil C34 printed on a printed circuit board near the disc 1 (fig. 1), and the driving coil D31 is triangular and surrounds three induction coils within its scope as shown in fig. 3. The three induction coils are arranged circumferentially at equal angles, and the size of each coil is consistent.
The sizes of the induction coil a32, the induction coil B33, and the induction coil C34 all agree with the size of the metal film 11.
The working principle of the embodiment is as follows:
the MCU generates a square wave signal through the pulse processing unit, generates an excitation signal after being shaped and amplified through the inverter, and drives the driving coil D31, the driving coil D31 enables the induction coil A32, the induction coil B33 and the induction coil C34 to generate induced electromotive force through electromagnetic induction, the electromotive force is subjected to signal amplification through the signal amplifier and is input to the input end of the comparator after being filtered by the filter, and the output quantity of the comparator is used for the MCU to perform signal processing;
MCU judges the rolling disc 1 through the data of handling the comparator output and rotates the number of turns, and antimagnetic measurement detection module 3 detects 1 rotation of rolling disc 1 and turns, then uses 1L water to this measurement water consumption.
MCU judges sheetmetal position, rolling disc 1 rotation direction through handling comparator output data: whether the water meter is installed in the reverse direction or not is judged according to the sequence that the metal film 11 on the rotating disk 1 rotates to the position below the induction coil A, B, C (forward rotation: sequentially passes through the induction coil A, B, C, and reverse rotation: sequentially passes through the induction coil C, B, A).
The method comprises the following specific steps:
when there is no metal wafer below the induction coil A, B, C (three induction coils when the metal sheet is not covered), the output signal is as shown in fig. 5;
when the metal sheet is not arranged below any coil, the induced voltage change conditions of the three induction coils are consistent, so that the signals at the input ends of the comparator have no difference.
When the metal wafer shields the induction coil a32 (when the metal wafer shields the coil a), the output signal is as shown in fig. 6;
when the metal sheet shields the induction coil a32, the induction coil a32 releases energy rapidly due to the electromagnetic eddy current effect, and the induced electromotive force drops rapidly. After signal amplification, the signal is input into the input end of the comparator. The MCU judges the position of the metal sheet by processing the output data of the comparator.
When the metal wafer is under the induction line B (when the metal sheet shields the coil B), the output signal is as shown in fig. 7:
when the metal sheet shields the induction coil B33, the induction coil B33 releases energy rapidly due to the electromagnetic eddy current effect, and the induced electromotive force drops rapidly. After signal amplification, the signal is input into the input end of the comparator. The MCU judges the position of the metal sheet, the rotating direction of the disc and the number of rotating turns by processing the output data of the comparator.
When the metal sheet rotates below the induction coil C34 (when the metal sheet covers the coil C), the output signal is as shown in fig. 8;
when the metal sheet shields the induction coil C34, the induction coil C34 releases energy rapidly due to the electromagnetic eddy current effect, and the induced electromotive force drops rapidly. After signal amplification, the signal is input into the input end of the comparator. The MCU judges the position of the metal sheet, the rotating direction of the disc and the number of rotating turns by processing the output data of the comparator.
The slow attenuation is represented by the low level and the fast attenuation is represented by the next low level, resulting in the logic shown in fig. 9 when the disk covering a portion of the metal sheet is rotated;
in fig. 9, the state a represents that the metal plate blocks the coil a, the state B represents that the metal plate blocks the coil B, and the state C represents that the metal plate blocks the coil C.
The beneficial effects of this embodiment:
the three induction coils are used, so that the rotation number and the rotation direction can be accurately acquired; the coil is driven by sharp pulses, so that the energy is more concentrated, and the anti-interference performance is stronger; the metering detection mode adopts a short-time multi-pulse mode for driving, and metering is accurate and reliable. In most of the running time, the single chip microcomputer, the driving circuit, the induction signal processing circuit and the comparator are all in a dormant state, and the low power consumption characteristic of the device is ensured.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. The utility model provides a water/gas table is with anti-interference low-power consumption antimagnetic measurement sampling device which characterized in that includes:
the upper surface of the rotating disc is provided with a metal film;
the antimagnetic metering detection module is positioned above the rotating disc and sequentially comprises an induction coil layer, a driving coil layer and an element layer from bottom to top; the element layer comprises an MCU, a phase inverter and a comparator, wherein the input end of the phase inverter is connected with the output end of the MCU; the driving coil layer comprises a driving coil D, and the input end of the driving coil D is connected with the output end of the inverter; the number of the induction coils is at least three, the induction coils comprise an induction coil A, an induction coil B and an induction coil C, the input ends of the induction coil A, the induction coil B and the induction coil C are all connected with the output end of the driving coil D, the output ends of the induction coil A, the induction coil B and the induction coil C are all connected with the input end of the comparator, and the output end of the comparator is connected to the MCU.
2. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 1, characterized in that: and the shielding layer is positioned between the element layer and the driving coil layer.
3. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 1, characterized in that: the driving coil D driving circuit further comprises a buffer, wherein the input end of the buffer is connected with the output end of the phase inverter, and the output end of the buffer is connected with the input end of the driving coil D.
4. The anti-interference low-power consumption antimagnetic measurement sampling device for the water/gas meter according to claim 3, characterized in that: the MCU comprises a pulse processing unit and a capacitor which are connected, the pulse processing unit is connected with the phase inverter, and the capacitor is connected with the buffer.
5. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 1, characterized in that: the output ends of the induction coil A, the induction coil B and the induction coil C are connected with the input end of the signal amplifier, and the output end of the signal amplifier is connected with the input end of the comparator.
6. The anti-interference low-power consumption antimagnetic measurement sampling device for the water/gas meter according to claim 5, characterized in that: the input end of the filter is connected with the output end of the signal amplifier, and the output end of the filter is connected with the input end of the comparator.
7. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 1, characterized in that: the metal film is a damping metal film, and the metal film is circular.
8. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 1 or 7, characterized in that: the size of the induction coil A, the size of the induction coil B and the size of the induction coil C are the same as the size of the metal film.
9. The anti-interference low-power consumption antimagnetic metering sampling device for the water/gas meter according to claim 8, characterized in that: the induction coil A, the induction coil B and the induction coil C enclose a triangular shape.
10. The anti-interference low-power consumption antimagnetic measurement sampling device for the water/gas meter according to claim 7, characterized in that: the driving coil D has a triangular shape.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729438A (en) * | 2020-12-22 | 2021-04-30 | 连云港腾越电子科技有限公司 | Water flow direction detection device and method in water meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729438A (en) * | 2020-12-22 | 2021-04-30 | 连云港腾越电子科技有限公司 | Water flow direction detection device and method in water meter |
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