Sensing device and water meter

Abstract

The utility model belongs to the technical field of electronic products, and particularly relates to an induction device and a water meter. The induction device comprises a rotor and a stator. The rotor comprises a rotatable induction part, the stator comprises an acquisition chip and a plurality of induction coils, two ends of each induction coil are respectively connected with the acquisition chip to form a loop, the induction coils are insulated from one another, the directions of magnetic fields generated by the induction coils are the same along the radial direction of the rotor, the shortest distances between the projections of the geometric centers of the plurality of induction coils on the rotor and the rotation center of the rotor are the same. By using the induction device in the technical scheme, the plurality of induction coils can adopt different winding shapes, so that the design flexibility is improved, and the layout of the induction coils is more reasonable and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to a sensing device and a water meter. Background Art

[0002] Existing smart water and gas meters typically consist of a mechanical base meter and a smart meter head mounted on top of it. The mechanical base meter includes a rotating component, and the smart meter head is equipped with a corresponding sensor component that detects the rotation of the rotating component and measures the number of revolutions, thereby achieving metering.

[0003] In the prior art, coils of equal length and shape need to be provided on a rotating component, and the coils need to be separated and symmetrically distributed. Therefore, the layout of the coils has great limitations.

[0004] Therefore, it is urgent to provide a sensing device and a water meter to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to at least solve the problem of limitations in coil layout. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides a sensing device, comprising:

[0007] a rotor including a rotatable induction component;

[0008] The stator includes an acquisition chip and multiple induction coils. Both ends of each induction coil are respectively connected to the acquisition chip to form a loop. The induction coils are insulated from each other. The magnetic fields generated by each induction coil have the same direction. The projections of the geometric centers of the multiple induction coils on the rotor are arranged at equal intervals along the circumference of the rotor. In the radial direction of the rotor, the shortest distances between the geometric centers of the multiple induction coils and the rotation center of the rotor are the same.

[0009] The acquisition chip in the induction device of the present technical solution is capable of generating a preset periodic signal, the characteristic parameters of which change with changes in the electrical parameters of the induction coil, which in turn change with changes in the overlapping area between the induction coil and the induction component. The acquisition chip is capable of detecting changes in the characteristic parameters of the periodic signal and mapping the changes in the signal characteristic parameters to the direction and number of turns of the rotor through a detection algorithm. Multiple induction coils can be arranged in different shapes, as long as the shortest distance between the geometric centers of the multiple induction coils and the rotation center of the rotor is the same in the radial direction of the rotor. This increases the flexibility of the design and makes the layout of the induction coils more reasonable and convenient.

[0010] In addition, the sensing device according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the shapes of the plurality of induction coils are different.

[0012] In some embodiments of the present invention, projections of the geometric centers of the plurality of induction coils on the rotor are arranged at equal intervals along the circumference of the rotor.

[0013] In some embodiments of the present invention, the induction coil includes a first section and a second section, the first end of the first section is electrically connected to the acquisition chip, the second end of the first section is electrically connected to the first end of the second section, the first section is at least partially configured to be curved, and the second section is configured to be a planar spiral.

[0014] In some embodiments of the present invention, the induction coil further includes a wire, a first through hole is provided at the second end of the second segment, a second through hole is provided on the outer side of the planar spiral formed by the second segment, the first end of the wire is electrically connected to the second end of the second segment through the first through hole, and the second end of the wire is electrically connected to the acquisition chip through the second through hole.

[0015] In some embodiments of the present invention, the rotor further includes a balancing component, and the balancing component is connected to the induction component.

[0016] In some embodiments of the present invention, the cross-sectional shape of the induction component on the first plane is semicircular, the cross-sectional area of ​​the induction component on the first plane is larger than the area of ​​the induction coil, and the first plane is perpendicular to the rotation axis of the induction component.

[0017] In some embodiments of the present invention, two induction components are provided, and the two induction components are symmetrically arranged about the rotation center of the rotor. The cross-sectional shapes of the two induction components on the first plane are both fan-shaped, and the first plane is perpendicular to the rotation axis of the induction component.

[0018] In some embodiments of the present invention, the acquisition chip is provided with a voltage input interface, and the voltage input interface is used to be electrically connected to a power supply;

[0019] In some embodiments of the present invention, the acquisition chip is provided with a communication interface, and the communication interface is used for signal connection with a microprocessor.

[0020] The present invention also provides a water meter, which includes the sensing device in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0022] Figure 1 This is a structural diagram of the stator provided by the utility model;

[0023] Figure 2 This is a schematic structural diagram of a rotor provided by the utility model;

[0024] Figure 3 This is a schematic structural diagram of another rotor provided by the utility model;

[0025] Figure 4 It is a circuit connection diagram provided by the utility model.

[0026] In the picture:

[0027] 100, rotor; 110, induction component; 120, balancing component; 200, stator; 210, acquisition chip; 220, induction coil; a, first section; b, second section; c, wire; c01, first through hole; c02, second through hole; d, third section; 221, first induction coil; 222, second induction coil; 223, third induction coil; 230, circuit board; 240, microprocessor. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0030] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0031] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0032] See also Figure 1 and Figure 2This embodiment provides an induction device, including a rotor 100 and a stator 200. The rotor 100 includes a rotatable induction component 110, and the stator 200 includes a collection chip 210 and multiple induction coils 220. The two ends of each induction coil 220 are connected to the collection chip 210 to form a loop. The induction coils 220 are insulated from each other. The magnetic field generated by each induction coil 220 has the same direction. The geometric center of the multiple induction coils 220 ( Figure 1 The induction coils 220 are arranged at equal intervals along the circumference of the rotor 100. In the radial direction of the rotor 100, the projections of the geometric centers of the induction coils 220 on the rotor 100 are aligned with the rotation center of the rotor 100 ( Figure 2 The shortest distance between the midpoints C) is the same.

[0033] The acquisition chip 210 in the aforementioned induction device is capable of generating a preset periodic signal. The characteristic parameters of this periodic signal change with changes in the electrical parameters of the induction coil 220, which in turn change with changes in the overlapping area between the induction coil 220 and the induction component 110. The acquisition chip 210 is capable of detecting changes in the characteristic parameters of this periodic signal and, through a detection algorithm, mapping these changes in the characteristic parameters to the rotation direction and number of turns of the rotor 100. The multiple induction coils 220 can adopt different winding shapes, as long as the shortest distance between the projections of the geometric centers of the multiple induction coils 220 on the rotor 100 and the rotation center of the rotor 100 in the radial direction of the rotor 100 is the same. This increases design flexibility and makes the layout of the induction coils 220 more reasonable and convenient.

[0034] Furthermore, in some embodiments, the shapes of the multiple induction coils 220 are different. In practical applications, the magnetic induction intensity at the geometric center of the induction coil 220 can be adjusted by changing the geometric shape of the induction coil 220. Because the geometric centers of the multiple induction coils 220 are on the same circle, the shapes of the multiple induction coils 220 do not need to be identical, reducing the dependence on the shape and making the arrangement of the induction coils 220 more flexible.

[0035] In this embodiment, the outer contours of the stator 200 and the rotor 100 are both circular. Figure 1 The center A of the circle in FIG2 is arranged opposite to the rotation center of the rotor 100. In other embodiments, the shapes of the stator 200 and the rotor 100 may also be polygonal or other irregular shapes.

[0036] Preferably, see Figure 1, the projections of the geometric centers of the multiple induction coils 220 on the rotor 100 are arranged at equal intervals along the circumference of the rotor 100. The position of the geometric center of the induction coil 220 may affect the design of the induction coil 220, including its shape, size, and routing path. Accurately determining the geometric center of the induction coil 220 is crucial to the performance of the induction coil 220, especially in situations where precise control of the magnetic field distribution is required. By arranging the geometric centers of the multiple induction coils 220 at equal intervals along the circumference of the rotor 100, it can be ensured that the projections of the geometric center of the magnetic field generated by each induction coil 220 on the rotor 100 are arranged at equal intervals along the circumference of the rotor 100. The geometric center of the induction coil 220 can usually be confirmed by visual inspection (using an industrial camera instead of the human eye to measure and judge) or electromagnetic testing.

[0037] Furthermore, the acquisition chip 210 is equipped with an acquisition and processing circuit that generates a preset periodic signal and detects changes in the characteristic parameters of the periodic signal. Using a detection algorithm, these changes in the signal characteristic parameters are mapped to the number of rotor rotations. The induction device is non-magnetic and made of non-magnetic materials, effectively avoiding magnetic field interference and ensuring accurate and safe operation. Optionally, the acquisition and processing circuit includes an LC oscillator circuit. The switching frequency of the MOSFET within the acquisition chip 210 enables the LC oscillator circuit to output a sinusoidal signal. The induction coil 220 generates a magnetic field through current, exerting a magnetic effect on the surrounding area. During the rotation of the induction component 110, when the induction component 110 approaches the induction coil 220, an induced current is generated that prevents the increase in magnetic flux, causing the sine wave to decay. When the induction component 110 is below the induction coil 220, eddy currents are generated, resulting in greater power consumption and a faster decay of the sine wave. When induction component 110 is away from induction coil 220, an induced current is generated that prevents the magnetic flux from decreasing. When induction coil 220 is away from induction component 110, eddy currents are essentially nonexistent, and the sine wave decays at a relatively slow rate. The decay of the sine wave can be used to determine the operating status of rotor 100, calibration sampling value deviation, and measurement value deviation.

[0038] In this embodiment, the number of the induction coils 220 is three. In other embodiments, the number of the induction coils 220 can be two, four, five, or six, etc., and can be set according to usage needs.

[0039] Alternatively, see Figure 2 and Figure 3The induction coil 220 includes a first segment a and a second segment b. The first end of the first segment a is electrically connected to the acquisition chip 210, and the second end of the first segment a is electrically connected to the first end of the second segment b. The first segment a is at least partially curved, while the second segment b is arranged in a planar spiral. The curved shape of at least a portion of the first segment a helps reduce electromagnetic interference between the induction coils 220, and the inductance of the induction coil 220 can be adjusted by varying the arc and length. The spiral shape of the second segment b increases the length of the induction coil 220. By extending the range of the induction coil 220 through a longer trajectory, the inductance of the induction coil 220 can be increased or its performance can be adjusted. It will be understood that the specific shape of the induction coil 220 is determined based on predetermined parameters of the induction coil 220, including the inductance and number of turns.

[0040] Furthermore, the induction coil 220 includes a conductor c. The second end of the second segment b is provided with a first through-hole c01, and the outer side of the planar spiral formed by the second segment b is provided with a second through-hole c02. The first end of the conductor c is electrically connected to the second end of the second segment b through the first through-hole c01, and the second end of the conductor c is electrically connected to the acquisition chip 210 through the second through-hole c02. This approach allows for wiring connections between different layers of the circuit board 230, preventing overlap or crossing of circuits within the same layer, thereby increasing design flexibility. Optionally, a third segment d is also printed on the circuit board 230. The first end of the third segment d is electrically connected to the second end of the conductor c, and the second end of the third segment d is electrically connected to the acquisition chip 210. By way of example, in the induction coil 220, the first end of the first segment a is the starting point of the current, and the second end of the third segment d is the end point of the current. That is, the current flows sequentially through the first segment a, the second segment b, the conductor c, and the third segment d.

[0041] Optionally, the sensing device includes a circuit board 230, on which the acquisition chip 210 is disposed, and on which the first segment a and the second segment b are printed. Printing the coil directly onto the circuit board 230 using a printing process eliminates the need for manual or mechanical coil winding. This not only reduces labor and production costs, but also enables greater consistency in the sensing device and facilitates mass production.

[0042] Furthermore, the first segment a, second segment b, and third segment d are located on the side of the circuit board 230 facing the inductive component 110, while the conductor c is located on the side of the circuit board 230 facing away from the inductive component 110. Placing the conductor c and the coil on opposite sides of the circuit board 230 prevents mutual interference, optimizes circuit performance, and ensures proper operation of the circuit.

[0043] Optionally, the rotor 100 is connected to a rotating shaft, and the rotor 100 can rotate around the rotating shaft. Furthermore, the rotor 100 also includes a balancing component 120, and the balancing component 120 is connected to the induction component 110. The balancing component 120 is a non-induction area, which is used to ensure that the induction component 110 can rotate smoothly around the rotating shaft in a plane. In some embodiments, the rotor 100 is a cylindrical structure, that is, the induction component 110 and the balancing component 120 are connected to form a cylindrical structure. Setting the rotor 100 to a cylindrical shape is relatively simple in structural design, and it is easy to ensure that the rotor 100 can rotate smoothly. Of course, in other embodiments, the rotor 100 can also be a truncated cone, polygon or other irregular shape, as long as it is ensured that the induction component 110 can rotate smoothly around the rotating shaft.

[0044] Alternatively, see Figure 3 , the cross-sectional shape of the induction component 110 on the first plane is semicircular, the cross-sectional area of ​​the induction component 110 on the first plane is larger than the area of ​​the induction coil 220, and the first plane is perpendicular to the rotation axis of the induction component 110. Optionally, the cross-sectional shape of the balancing component 120 on the first plane may be fan-shaped, triangular or other shapes, as long as the induction component 110 can rotate smoothly. By setting the cross-sectional area of ​​the induction component 110 on the first plane to be larger than the area of ​​the induction coil 220, during the rotation of the rotor 100, the induction component 110 can completely block the induction coil 220, making calculation more convenient. Optionally, the induction component 110 is provided with a conductive layer, which may be a metal component or a conductive coating. When the conductive layer rotates below the induction coil 220, electromagnetic induction occurs between the conductive layer and the induction coil 220.

[0045] Alternatively, see Figure 4 Two induction components 110 are provided, and the two induction components 110 are symmetrically arranged about the rotation center of the rotor 100. The cross-sectional shape of the two induction components 110 on a first plane is sector-shaped, and the first plane is perpendicular to the rotation axis of the induction components 110. Optionally, two balancing components 120 are provided, and the two balancing components 120 are symmetrically arranged about the rotation center of the rotor 100. The cross-sectional shape of the two balancing components 120 on the first plane is sector-shaped. The two induction components 110 and the two balancing components 120 are spliced ​​to form a cylindrical rotor 100.

[0046] Furthermore, the acquisition chip 210 is provided with a voltage input interface, through which the acquisition chip 210 is electrically connected to a power supply. Furthermore, the acquisition chip 210 is provided with a communication interface, through which the acquisition chip 210 is signal-connected to the microprocessor 240, so as to output the rotation measurement data of the rotor 100 to the microprocessor 240. The microprocessor 240 then obtains the rotation direction and number of revolutions of the rotor 100 based on the rotation measurement data.

[0047] For example, see Figure 4 The induction coil 220 includes a first induction coil 221, a second induction coil 222, and a third induction coil 223. Each of the first induction coil 221, the second induction coil 222, and the third induction coil 223 is connected to the data acquisition chip 210 via different pins. The first induction coil 221 is connected to the data acquisition chip 210 via pins 5 and 6, the second induction coil 222 is connected to the data acquisition chip 210 via pins 8 and 9, and the third induction coil 223 is connected to the data acquisition chip 210 via pins 11 and 12. The data acquisition chip 210 also has power supply voltage input pins 4 and 13 for receiving a power supply. The communication interface includes pins 1, 2, 3, 15, and 16, through which the data acquisition chip 210 is connected to the microprocessor 240.

[0048] Furthermore, this embodiment also provides a water meter, including the above-mentioned sensing device.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sensing device, characterized in that: include: A rotor (100), the rotor (100) including a rotatable induction component (110); The stator (200) comprises an acquisition chip (210) and a plurality of induction coils (220), wherein both ends of each induction coil (220) are respectively connected to the acquisition chip (210) to form a loop, and the induction coils (220) are insulated from each other. The magnetic fields generated by each induction coil (220) have the same direction, and along the radial direction of the rotor (100), the projections of the geometric centers of the plurality of induction coils (220) on the rotor (100) are the same as the shortest distance between the rotation center of the rotor (100).

2. The sensing device according to claim 1, characterized in that The shapes of the plurality of induction coils (220) are different.

3. The sensing device according to claim 1, characterized in that Projections of the geometric centers of the plurality of induction coils (220) on the rotor (100) are arranged at equal intervals along the circumference of the rotor (100).

4. The sensing device according to any one of claims 1 to 3, characterized in that: The induction coil (220) comprises a first section (a) and a second section (b), wherein a first end of the first section (a) is electrically connected to the acquisition chip (210), and a second end of the first section (a) is electrically connected to a first end of the second section (b), wherein the first section (a) is at least partially configured to be curved, and the second section (b) is configured to be spirally arranged in a plane.

5. The sensing device according to claim 4, characterized in that The induction coil (220) further includes a wire (c), a first through hole (c01) is provided at the second end of the second section (b), a second through hole (c02) is provided on the outer side of the planar spiral formed by the second section (b), the first end of the wire (c) is electrically connected to the second end of the second section (b) through the first through hole (c01), and the second end of the wire (c) is electrically connected to the acquisition chip (210) through the second through hole (c02).

6. The sensing device according to any one of claims 1 to 3, characterized in that: The rotor (100) further includes a balancing component (120), and the balancing component (120) is connected to the induction component (110).

7. The sensing device according to any one of claims 1 to 3, characterized in that: The cross-sectional shape of the induction component (110) on the first plane is semicircular, the cross-sectional area of ​​the induction component (110) on the first plane is larger than the area of ​​the induction coil (220), and the first plane is perpendicular to the rotation axis of the induction component (110).

8. The sensing device according to any one of claims 1 to 3, characterized in that: Two induction components (110) are provided, and the two induction components (110) are symmetrically arranged about the rotation center of the rotor (100). The cross-sectional shapes of the two induction components (110) on a first plane are both fan-shaped, and the first plane is perpendicular to the rotation axis of the induction components (110).

9. The sensing device according to any one of claims 1 to 3, characterized in that: The acquisition chip (210) is provided with a voltage input interface, and the voltage input interface is used for being electrically connected to a power supply; The acquisition chip (210) is provided with a communication interface, and the communication interface is used for signal connection with the microprocessor (240).

10. A water meter, characterized in that: The invention comprises the sensing device according to any one of claims 1 to 9.

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