TWI730810B - Electronic water meter - Google Patents

Abstract

An electronic water meter includes a fluid module and an induction module. The fluid module includes an induction blade and a blade wheel. The induction blade is pivotally connected to the blade wheel. When the blade wheel is rotated by a fluid flow, the blade wheel drives the induction blade to rotate together. The fluid module and the induction module are separated in different independent spaces, and the two are magnetically coupled. The induction module includes a waterproof casing and an induction circuit. The waterproof casing is wrapped under the sensing circuit and isolates the fluid from contacting the induction circuit. The induction circuit generates a magnetic field downward, and the induction circuit obtains characteristic patterns of fluid signals from a distribution of the magnetic field by the magnetic change of the induction blade rotated.

Description

Electronic water meter

The present invention relates to an electronic water meter, in particular to an electronic water meter in which the sensing circuit and the fluid module are completely isolated and the fluid signal is obtained through magnetic field disturbance.

In terms of the prior art, most of the traditional water meters are of mechanical design, which use the momentum of the water flowing in the pipeline to drive the turbine structure in the water meter, and use the turbine structure to drive the turbine center and gear assembly to rotate together. Finally, the gear assembly converts the momentum of the water flow into pointers or digital wheels and other forms and presents it on the water meter.

However, traditional water meters of mechanical design rely only on gear components to achieve the purpose of quantifying the flow of water. However, after long-term use, a large number of gears in the gear components are prone to errors due to wear or deformation, or even unable to operate. , So the reliability of the measurement data obtained is poor. In addition, since the gear assembly causes considerable resistance to the water flow, measurement may not be possible due to the inability to push the gear assembly when the amount of water is small, and the sensitivity of sensing the water flow is poor.

The purpose of the present invention is to provide an electronic water meter, which solves the technical problems of poor reliability of the measurement data obtained due to gear wear or deformation under long-term use and the inability to perform measurement when the water volume is small, so as to achieve improvement. The purpose of reliability and sensitivity.

In order to achieve the foregoing objective, the electronic water meter proposed in the present invention includes a fluid module and a sensor module. Wherein, the fluid module includes a sensing blade and an impeller. The sensing blade is pivotally connected to the impeller. When the impeller is subjected to a change in the flow momentum of the fluid, the sensing blade is driven to rotate. The sensing module is arranged on the fluid module and forms an independent enclosed space. The sensing module includes a waterproof housing, a sensing circuit and a battery, and is isolated from the enclosed space formed by the fluid module. Wherein, the battery is connected to the sensing circuit, the waterproof casing is wrapped under the sensing circuit and the battery, and the fluid contacting the sensing circuit and the battery is insulated, the sensing blade is pivotally arranged under the bottom surface of the waterproof casing, and the sensing circuit is generated downward The magnetic field, and the induction circuit obtains the characteristic mode of the fluid signal through the disturbance of the magnetic field by the rotating induction blade.

Furthermore, in the electronic water meter, a pivot part is recessed below the bottom surface of the waterproof housing, and a convex post is protruding above the top surface of the sensing blade, and the convex post is pivotably inserted into the pivot Part, the induction module does not have any rotating structure to rotate with the impeller.

Furthermore, in the electronic water meter, a first pivot is protruding below the bottom surface of the sensing blade, a second pivot is protruding above the bottom surface of the fluid module, and the impeller is pivotably clamped on the first pivot. Between a pivot and a second pivot; wherein, the second pivot is inserted in the lower groove of the impeller, the first pivot is inserted in the upper groove of the impeller, and the side surface of the first pivot is formed with a fixing For the unit, a clamping groove is formed at the top of the upper groove, and the clamping unit is clamped in the clamping groove.

Furthermore, in the electronic water meter, the sensing circuit includes a first inductor, a first inductance converter, an analog-to-digital converter, a processing unit, and a storage unit; wherein, the first inductance converter is connected to the first inductance converter. The inductor and the analog-to-digital converter, the analog-to-digital converter is connected to the processing unit, the first inductor is facing downward to generate a magnetic field, and the processing unit obtains the fluid signal and flow direction characteristics through the disturbance of the magnetic field by the rotating induction blade; storage module connection processing Unit, and store the reference value output to the processing unit.

Furthermore, in the electronic water meter, the sensing circuit further includes a second inductor and a second inductance converter, and the second inductance converter is connected to the second inductor and the analog-to-digital converter.

Furthermore, in the electronic water meter, the sensing circuit further includes a second inductor, a third inductor, a second inductance converter, and a third inductance converter. The second inductance converter is connected to the second inductor and the analog The digital converter, and the third inductance converter is connected to the third inductor and the analog to digital converter.

Furthermore, in the electronic water meter, the sensing circuit is locked to a plurality of raised columns on the inner wall of the lower part of the waterproof housing, and an accommodating space is formed between the sensing circuit and the inner wall of the lower part of the waterproof housing. The housing includes a first inductor, a second inductor, and a third inductor that are arranged in a ring and face downwards.

Furthermore, in the electronic water meter, a plurality of magnetic conductive units are arranged radially or upward on the top surface of the sensing blade, and the sensing circuit obtains the fluid through the plurality of magnetic conductive units of the rotating sensing blade. The characteristic mode of the signal. The fluid signal includes the flow velocity and flow rate of the fluid.

Furthermore, in the electronic water meter described above, most of the magnetic conductive units are arranged on the top surface of the sensing blade at unequal distances or at unequal heights to form the flow characteristics of fluid flow. The fluid signal further includes the flow direction of the fluid. Directional characteristics.

Furthermore, in the electronic water meter, each magnetic permeable unit is a curved surface on the top surface of the sensing blade, and each curved surface extends from the center of the sensing blade to the periphery of the sensing blade.

Furthermore, in the electronic water meter, a convex circular platform is formed at the center of the top surface of the sensing blade, and the peripheral edge of the circular platform is radially outward to form a spiral and gradually decreasing height. There are two wire grooves, and one of the magnetic conductive units is arranged at the periphery of each wire groove adjacent to the top surface.

Furthermore, in the electronic water meter described above, each magnetic permeable unit is a disc, a sector, an annular inlay, a radial or a rectangular plate.

Furthermore, in the electronic water meter, the sensing blade is cut into n parts, of which m parts have magnetic permeability; the other nm parts have the same material and do not have magnetic permeability; the relational expression is 0<m< n, 2≦n.

Furthermore, in the electronic water meter, the sensing blade is cut into n parts, and the area of each cut part is A+B, where the area A has magnetic permeability; the area B does not have magnetic permeability; 2≦n.

Furthermore, in the electronic water meter, the induction blade is cut into n parts, of which m parts of magnetically permeable materials have the first type of plane height; other nm non-magnetic materials have the second type of plane height; The relational expression is 0<m<n, 2≦n.

Furthermore, the electronic water meter further includes a lower shell, the fluid module is accommodated in the lower shell, and the fluid module further includes a drainage carrier, a sensing blade and an impeller accommodated in In the drainage carrier, the drainage carrier includes a first drainage hole and a second drainage hole. The first drainage hole is arranged under the second drainage hole; when the fluid enters the lower housing from one end of the lower housing, the fluid first passes through the first drainage hole. A drainage hole enters the fluid module, and then, after the fluid drives the impeller to rotate, the fluid leaves the fluid module through the second drainage hole, and the fluid leaves the lower housing from the other end of the lower housing.

Furthermore, in the electronic water meter, the sensing module further includes a display control module and an upper cover; the display control module is disposed on the sensing circuit and the battery, and is fixed on the inner wall of the waterproof housing to display The control module displays fluid signals; the upper cover includes a ring body and a transparent cover plate, and the periphery of the transparent cover plate is sandwiched between the ring body and the waterproof shell.

When the electronic water meter of the present invention is used, the sensing circuit obtains the fluid signal through the disturbance of the magnetic field by the rotating sensing blade, and the waterproof housing isolates the fluid contacting the sensing circuit and the battery. The foregoing content represents that the sensing circuit of the present invention performs wireless sensing with the sensing blades of the fluid module through non-physical contact, and obtains fluid signals through wireless sensing. For this reason, the present invention solves the problem that the prior art has been used for a long time. The technical problem of poor reliability of the measurement data obtained due to gear wear or deformation. In addition, since there is no gear assembly between the induction circuit and the fluid module of the present invention, there is no resistance to the fluid, and it can be measured even when the amount of water is small. Furthermore, the electronic water meter of the present invention can be equipped with an antenna to have the functions of remote monitoring or automatic meter reading. For this reason, the electronic water meter of the present invention solves the technical problems of the prior art and achieves the purpose of improving reliability and sensitivity.

In order to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe that the features and characteristics of the present invention can be obtained from this in-depth and specific understanding. However, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

1: fluid module

2: Induction module

3: lower shell

11, 11’: induction blade

12, 12’: Impeller

13: Drainage carrier

21: Waterproof shell

22,22’,22”: Induction circuit

23: battery

24: Display control module

25: Upper cover

31: fluid inlet

32: fluid outlet

34: Flow adjustment valve

100: Waterproof gasket

111: convex column

112: The first pivot

113: card fixing unit

114: round platform

115: wire slot

121: lower groove

122: upper groove

123: card slot

131: The first drainage hole

132: Second drainage hole

133: Second Pivot

200: Magnetic permeable unit

211: Pivot

212: Antenna connector

221: first inductor

221’: Second inductor

221": third inductor

222: The first inductance converter

222’: Second inductance converter

222": The third inductance converter

223: Analog to Digital Converter

225: Processing Unit

226: storage unit

251: first ring body

252: second ring body

253: Transparent cover

300: Raised column

S, S1~S8: area

Figure 1 is a schematic diagram of the appearance of the electronic water meter of the present invention; Figures 2A and 2B are schematic cross-sectional views of an embodiment of the electronic water meter of the present invention; Figure 3 is an exploded schematic diagram of this embodiment of the electronic water meter of the present invention; Figure 4 is The exploded schematic diagram of the induction blade and impeller of the electronic water meter of the present invention; FIG. 5 is a schematic cross-sectional view of another embodiment of the electronic water meter of the present invention; FIG. 6 is a schematic diagram of the inductor of the other embodiment of the electronic water meter of the present invention; 7 is a schematic cross-sectional view of another embodiment of the electronic water meter of the present invention; FIG. 8 is a schematic diagram of the first embodiment of the sensing circuit of the electronic water meter of the present invention; FIG. 9 is a schematic view of the sensing circuit of the electronic water meter of the present invention The schematic diagram of the second embodiment; FIG. 10 is a schematic diagram of the third embodiment of the sensing circuit of the electronic water meter of the present invention; and FIGS. 11-20 are schematic diagrams of the structure of the sensing blade of the electronic water meter of the present invention.

The following is a specific embodiment to illustrate the implementation of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied by other different specific examples. The present invention illustrates Various details in the book can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the structure, ratio, size, number of components, etc. shown in the drawings in this specification are only used to match the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not intended to limit the scope of the present invention. The limited conditions of implementation do not have any technical significance. Any structural modification, proportional relationship change, or size adjustment should fall within the scope of the present invention without affecting the effects that can be produced and the goals that can be achieved by the present invention. The technical content disclosed by the invention can be covered.

The technical content and detailed description of the present invention are described below in conjunction with the drawings.

Please refer to Figure 1 to Figure 4. Among them, FIG. 1 is a schematic diagram of the appearance of the electronic water meter of the present invention. 2A and 2B are schematic cross-sectional views of the electronic water meter of the present invention. Figure 3 is an exploded schematic diagram of the electronic water meter of the present invention. Fig. 4 is an exploded schematic diagram of the sensing blade and impeller of the electronic water meter of the present invention. The electronic water meter according to an embodiment of the present invention includes a fluid module 1, a sensing module 2 and a lower casing 3. The lower housing 3 includes a fluid inlet 31 and a fluid outlet 32, and the fluid module 1 is contained in the lower housing 3. The fluid module 1 includes a sensing blade 11 and an impeller 12. The sensing blade 11 is pivotally connected to the impeller 12. When the impeller 12 is rotated by the flow of fluid (not shown), the impeller 12 drives the sensing blade 11 to rotate together. Furthermore, the fluid module 1 further includes a drainage carrier 13, and the sensing blade 11 and the impeller 12 are accommodated in the drainage carrier 13. The drainage carrier 13 includes a first drainage hole 131 and a second drainage hole 132, and the first drainage hole 131 is disposed under the second drainage hole 132. When the fluid enters the lower housing 3 through the fluid inlet 31 of the lower housing 3, the fluid first enters the fluid module 1 through the first drainage hole 131. Then, after the fluid drives the impeller 12 to rotate, the fluid leaves the fluid module 1 through the second drainage hole 132, and the fluid leaves the lower housing 3 through the fluid outlet 32 of the lower housing 3. In the implementation of the present invention In an example, there is a waterproof gasket (O-ring) 100 between the drainage carrier 13 and the lower housing 3, and the lower housing 3 is screwed with a flow adjusting valve 34 to adjust the flow.

The sensing module 2 is disposed on the fluid module 1, and the sensing module 2 includes a waterproof housing 21, a sensing circuit 22 and a battery 23. The battery 23 is connected to the sensing circuit 22, and the waterproof housing 21 covers the sensing circuit 22 and the battery 23, and isolates the fluid contacting the sensing circuit 22 and the battery 23. The sensing blade 11 is pivotally arranged on the bottom surface of the waterproof housing 21 Below, the sensing circuit 22 can be a circuit board and includes a first inductor 221 that generates a magnetic field (not shown) downwards, and the sensing circuit 22 obtains a fluid signal (not shown in the figure) through the perturbation of the rotating sensing blade 11 on the magnetic field. Show) characteristic mode. In the described embodiment of the present invention, the sensing module 2 further includes a display control module 24 and an upper cover 25. The display control module 24 is disposed on the sensing circuit 22 and the battery 23, and is fixed on the inner wall of the waterproof housing 21, and the display control module 24 displays fluid signals. The upper cover 25 includes a first annular body 251, a second annular body 252 and a transparent cover 253. The second ring body 252 is disposed under the first ring body 251 and screwed on the upper end of the waterproof housing 21. The periphery of the transparent cover plate 253 is pressed by the first ring body 251 and the second ring body 252 and is sandwiched between the second ring body 252 and the waterproof housing 21. The transparent cover 253 can be made of transparent materials such as glass or acrylic. In the embodiment of the present invention, the lower half of the waterproof housing 21 is accommodated in the lower housing 3, and there is a waterproof gasket 100 between the waterproof housing 21 and the lower housing 3. The upper cover 25 is screwed to the lower housing 3 by a plurality of screws, so that the waterproof housing 21 is sandwiched between the transparent cover 253 and the drainage carrier 13.

Furthermore, a pivoting portion 211 is recessed under the bottom surface of the waterproof housing 21, and a protruding post 111 is protruding above the top surface of the sensing blade 11, and the protruding post 111 is pivotally inserted into the pivoting portion 211. A first pivot 112 is protrudingly provided under the bottom surface of the sensing blade 11, and a second pivot 133 is protrudingly provided above the bottom surface of the drainage carrier 13 at the bottom of the fluid module 1, and the impeller 12 can be It is pivotally sandwiched between the first pivot 112 and the second pivot 133. Wherein, the second pivot 133 is inserted in the lower groove 121 of the impeller 12, the first pivot 112 is inserted in the upper groove 122 of the impeller 12, and a fixing unit 113 is formed on the side of the first pivot 112. A locking groove 123 is formed at the top of the groove 122, and the locking unit 113 is locked in the locking groove 123. For this reason, while the impeller 12 rotates, it can drive the induction blade 11 to rotate together. In the described embodiment of the present invention, the side wall of the waterproof housing 21 is screwed with an antenna connector 212, and the antenna connector 212 is connected to the sensing circuit 22. The antenna connector 212 is compatible with coaxial cable specifications such as SMA, SMB, TNC, N-type, M-type, BNC, MCX, etc., and can be screwed with antennas such as Wi-Fi and LoRa.

Please refer to Figure 5 and Figure 6. 5 is a schematic cross-sectional view of another embodiment of the electronic water meter of the present invention, and FIG. 6 is a schematic view of an inductor of the other embodiment of the electronic water meter of the present invention. In another embodiment of the aforementioned electronic water meter, it is substantially the same as the aforementioned embodiment of the aforementioned electronic water meter, except that the sensing circuit 22" is a raised cylinder 300 that is locked on the inner wall below the waterproof housing 21. , And make the circuit board as the induction circuit 22" and the lower inner wall of the waterproof housing 21 form an accommodating space for accommodating the inductor, the induction circuit 22" in the accommodating room includes a ring and facing The first inductor 221, the second inductor 221', and the third inductor 221" are shown below (as shown in FIG. 6 is a schematic bottom view of the sensing circuit 22"). FIG. 7 is another implementation of the electronic water meter of the present invention A schematic cross-sectional view of the other embodiment. The schematic cross-sectional view of the still another embodiment is substantially the same as that of the previous other embodiment, except that the sensing blade 11' and the impeller 12' are integrated in an integrated manner.

Please refer to Figure 8 to Figure 10. Among them, FIG. 8 is a schematic structural diagram of the first embodiment of the sensing circuit of the electronic water meter of the present invention. FIG. 9 is a schematic structural diagram of the second embodiment of the sensing circuit of the electronic water meter according to the present invention. FIG. 10 is a schematic structural diagram of the third embodiment of the sensing circuit of the electronic water meter according to the present invention.

As shown in FIG. 8, in the first embodiment of the sensing circuit of the present invention, the sensing circuit 22 includes a first inductor 221, a first inductance converter 222, an analog-to-digital converter 223, a processing unit 225, and a storage unit 226 . Wherein, the first inductance converter 222 is connected to the first inductor 221 and the analog-to-digital converter 223, the analog-to-digital converter 223 is connected to the processing unit 225, the first inductor 221 generates a magnetic field (not shown) facing downward, and the processing unit The fluid signal and flow direction characteristics are obtained through the disturbance of the magnetic field by the rotating induction blade 11. The storage module 226 is connected to the processing unit 225, and stores a reference value output to the processing unit 225 (may be a factory preset value, not shown in the figure). The reference value is used to avoid wear and error of the impeller 12 or the sensing blade 11 after long-term use, and to provide the fluid information output by the processing unit 225 to calibrate.

As shown in FIG. 9, in the second embodiment of the induction circuit of the present invention, it is substantially the same as the aforementioned first embodiment, except that the induction circuit 22' further includes a second inductor 221' and a second inductance converter 222 '. The second inductance converter 222' is connected to the second inductor 221' and the analog-to-digital converter 223.

As shown in FIG. 10, in the third embodiment of the induction circuit of the present invention, it is substantially the same as the aforementioned first embodiment, except that the induction circuit 22" further includes a second inductor 221' and a third inductor 221" , The second inductance converter 222' and the third inductance converter 222". The second inductance converter 222' is connected to the second inductor 221' and the analog-to-digital converter 223, and the third inductance converter 222" is connected to the third inductor 221" and analog-to-digital converter 223.

The structure of the sensor blade of the electronic water meter of the present invention can be the first design method, wherein the sensor blade can be cut into n parts, and the material of the m parts can be It has magnetic permeability; other n-m parts have the same material, but do not have magnetic permeability; the relational expression is 0<m<n, 2≦n.

The structure of the sensor blade of the electronic water meter of the present invention can be the second design method, wherein the sensor blade can be cut into n parts, and the area of each cut part is A+B, where the area A has magnetic permeability; the area B No magnetic permeability; 2≦n.

The structure of the sensor blade of the electronic water meter of the present invention can be a third design method, wherein the sensor blade can be cut into n parts, and m parts of the magnetic material can have the first plane height; other nm The non-magnetic material has the second plane height; its relational expression is 0<m<n, 2≦n.

11 to 20 are schematic diagrams of the structure of the sensor blade of the electronic water meter of the present invention. A plurality of magnetic permeable units 200 are arranged on the top surface of the sensing blade 11 radially or upwardly. As shown in FIG. 2A, the inductive circuit 22 obtains fluid signals through the plurality of magnetic permeable units 200 of the rotating sensing blade 11 , The fluid signal can include the flow rate and flow rate of the fluid. Furthermore, most of the magnetic conductive units 200 can be arranged on the top surface of the induction blade 11 at unequal distances or unequal heights. Due to the unequal distances or unequal heights, the magnetic field is The interference will have different timing changes (for example, if 1 means that the induction circuit 22 senses the perturbation of the magnetic field by the magnetic permeable unit 200, and 0 means that the induction circuit 22 does not sense the perturbation of the magnetic field by the permeable unit 200, then the induction circuit 22 can determine the direction of rotation according to the configuration of the plurality of magnetic conductive units 200 on the sensing blade 11 (for example: 010011 cycle is forward direction, 110010 cycle is reverse direction), so the fluid signal can further include the direction characteristics of the flow direction of the fluid. Among them, each magnetic permeable unit 200 can be a disc, fan-shaped, radial, or rectangular, etc., and can be made of materials that are prone to ferromagnetism or ferrimagnetism, such as iron. , Cobalt, nickel, etc. and their compounds.

As shown in FIG. 11, the top surface of the sensing blade 11 is a complete circle. Each magnetic permeable unit 200 can be a fan-shaped piece and is disposed in the areas S1 and S4 on the top surface of the sensing blade 11, and the areas S1 and S3 are There is no magnetic permeable unit 200.

As shown in FIG. 12, similar to the aforementioned FIG. 8, except that the top surface of the sensing blade 11 is only divided into a region S1 and a region S2, and the top-view area of the region S1 is larger than the region S2, and the magnetic permeable unit 200 is only arranged in the region S2.

As shown in Figure 13, similar to Figure 8, except that the top surface of the sensing blade 11 is divided into regions S1, S2, S3, S4, and S5. The top area of the regions S1, S2, S4, and S5 is the same, but the top surface of the region S3 The plan area is smaller than the plan area of the regions S1, S2, S4, and S5.

As shown in FIG. 14, the top surface of the sensing blade 11 is a non-complete circle, and has four fan-shaped regions S1, S2, S3, S4 with the same top view area. The center of the sensing blade 11 has a circular area without magnetic conductivity. In the unit 200, each magnetically conductive unit 200 may be a radial sheet body, and each sector area is respectively configured with a magnetically conductive unit 200 with the same top-view area.

As shown in FIG. 15, the top surface of the sensing blade 11 is in a star shape, and the protruding regions S1, S2, S3, S4, S5, S6 of the star shape are rectangular (similar to a star-shaped engine shape), and each protruding region A magnetic permeable unit 200 in the shape of a rectangular sheet body is arranged on it.

As shown in FIG. 16, the top surface of the sensing blade 11 is a complete circle, and the center of the sensing blade 11 has a circular area non-magnetic unit 200. Each magnetically conductive unit 200 can be a radiating sheet body and is arranged in the sensing blade. Areas S1, S2, S3, S4, S5, S6, S7, and S8 on the top surface of the blade 11. The top view area of the magnetic permeable unit 200 in each region has a different size. Furthermore, the magnetic permeable unit 200 forms a curved surface on the top surface of the sensing blade 11, and each curved surface extends from the center of the sensing blade 11 toward the periphery of the sensing blade 11. If the induction vane 11 and the magnetic permeable unit Viewed from the vertical section of 200, the height of the curved surface formed by each magnetic permeable unit 200 radiating outward from the center of the induction blade 11 is as follows: the lowest point slowly rises to the highest point, and then slowly drops from the highest point to the lowest point, finally forming an arch It starts from the curved surface on the induction blade 11.

As shown in Figure 17, the induction blade 11 is a ring-shaped hollow body, the top surface of the induction blade 11 is a circular ring shape, and a cross part is reserved in the center, and each magnetic conductive unit 200 is a disc body, and is arranged on the cross Part of the edge regions S1, S2, S3, S4.

As shown in FIG. 18, it is similar to the aforementioned FIG. 14, except that the top surface of the sensing blade 11 is a complete circle.

In Fig. 19, similar to the aforementioned Fig. 15, except that there are 12 star-shaped protruding regions, in Fig. 17, two magnetic permeable units 200 are respectively and symmetrically arranged with respect to the two ends of the center of the induction blade 11. That is, the regions S1 and S2 correspond to the regions S3 and S4, and the protruding part where the magnetic permeable unit 200 protrudes in the radial direction relative to the other protruding parts, but the four magnetic permeable units 200 are arranged at equal distances from each other.

As shown in FIG. 20, a convex circular platform 114 is formed at the center of the top surface of the sensing blade 11, and the peripheral edge of the circular platform 114 radially outwards forms a plurality of spiral grooves with a gradually decreasing height. 115 (that is, a plurality of regions S), one of the magnetic conductive units 200 is disposed at the periphery of each wire slot 115 adjacent to the top surface. The magnetic permeable unit 200 may be in the shape of a disc.

When using the electronic water meter of the present invention, since the sensing circuit 22 obtains a fluid signal through the disturbance of the magnetic field by the rotating sensing blade 11, and the waterproof housing 21 isolates the fluid contact sensing circuit 22 and the battery 23. The foregoing content represents that the sensing circuit 22 of the present invention performs wireless sensing with the sensing blade 11 of the fluid module 1 through non-physical contact, and obtains the fluid signal through wireless sensing. For this reason, the present invention solves the long-term problems of the prior art. Use it The wear or deformation of the lower gear causes a technical problem that the reliability of the measurement data obtained is poor. Moreover, since there is no gear assembly between the sensing circuit 22 and the fluid module 1 of the present invention, it will not cause resistance to the fluid, and it can be measured even when the amount of water is small. Furthermore, the electronic water meter of the present invention can be equipped with an antenna to have the functions of remote monitoring or automatic meter reading. For this reason, the electronic water meter of the present invention solves the technical problems of the prior art and achieves the purpose of improving reliability and sensitivity.

The above are only detailed descriptions and drawings of the preferred embodiments of the present invention. However, the features of the present invention are not limited to these, and are not intended to limit the present invention. The full scope of the present invention should be covered by the following patent application scope As the criterion, all embodiments that conform to the spirit of the patent application of the present invention and similar changes should be included in the scope of the present invention. Anyone familiar with the art in the field of the present invention can easily think of changes or Modifications can be covered in the following patent scope of the present invention.

3: lower shell

25: Upper cover

31: fluid inlet

32: fluid outlet

34: Flow adjustment valve

212: Antenna connector

251: first ring body

253: Transparent cover

Claims (17)

An electronic water meter includes: a fluid module, including a sensing blade and an impeller, the sensing blade is connected to the impeller, and when the impeller receives a fluid flow momentum change, the sensing blade is driven to rotate; and a sensing blade The module is disposed on the fluid module and forms an independent enclosed space. The sensor module includes a waterproof housing, a sensor circuit, and a battery, and is isolated from the enclosed space formed by the fluid module Wherein, the battery is connected to the sensing circuit; the waterproof housing is wrapped under the sensing circuit and the battery, and isolates the fluid from contacting the sensing circuit and the battery; the sensing blade is pivotally arranged in the waterproof housing Under a bottom surface of the body; the induction circuit generates a magnetic field facing downwards, and the induction circuit obtains a fluid signal through the perturbation of the rotating induction blade on the magnetic field; wherein, the bottom surface of the waterproof housing is recessed with a A pivoting portion, a protruding post protruding from a top surface of the sensing blade, the protruding post is pivotably inserted into the pivoting portion, the sensing module does not have any rotating structure that rotates with the impeller; wherein, A second pivot is protruded on a bottom surface of the fluid module, and the second pivot is inserted into the lower groove of the impeller. The electronic water meter according to claim 1, wherein a first pivot is protruded under the bottom surface of the sensing blade, and the impeller is pivotably sandwiched between the first pivot and the second pivot In between, the first pivot is inserted into an upper groove of the impeller, a fixing unit is formed on a side surface of the first pivot, a fixing groove is formed at the top of the upper groove, and the fixing unit is locked Fit in the clamping groove. The electronic water meter according to claim 1, wherein the sensing circuit includes a first inductor, a first inductance converter, an analog-to-digital converter, a processing unit, and a storage unit; wherein, the first inductor The converter is connected to the first inductor and the analog-to-digital converter, the analog-to-digital converter is connected to the processing unit, the first inductor generates the magnetic field downward, and the processing unit influences the magnetic field through the rotating induction blade Disturbance obtains the fluid signal and flow direction characteristics; the storage module is connected to the processing unit and stores a reference value output to the processing unit. The electronic water meter according to claim 3, wherein the sensing circuit further includes a second inductor and a second inductance converter; the second inductance converter is connected to the second inductor and the analog-to-digital converter. The electronic water meter according to claim 3, wherein the sensing circuit further includes a second inductor, a third inductor, a second inductance converter, and a third inductance converter; the second inductance converter The second inductor and the analog-to-digital converter are connected, and the third inductance converter is connected to the third inductor and the analog-to-digital converter. The electronic water meter according to claim 5, wherein the sensing circuit is locked to a plurality of raised columns on the inner wall of the lower part of the waterproof case, and forms an accommodation space with the inner wall of the lower part of the waterproof case The sensing circuit includes the first inductor, the second inductor, and the third inductor that are arranged in a ring and face downwards in the accommodating room. The electronic water meter according to claim 1, wherein a plurality of magnetic conductive units are arranged radially or upward on a top surface of the sensing blade, and the sensing circuit passes through the plurality of rotating sensing blades. A magnetic permeable unit obtains a characteristic mode of the fluid signal, and the fluid signal includes the flow velocity and flow rate of the fluid. The electronic water meter according to claim 7, wherein the plurality of magnetic conductive units are arranged on the top surface of the sensing blade in unequal distances or unequal heights to form the flow characteristics of the fluid flow, and the fluid signal It also includes the directional characteristics of the flow direction of the fluid. The electronic water meter according to claim 7, wherein each of the magnetic conductive units forms a curved surface on the top surface of the sensing blade, and each of the curved surfaces extends from the center of the sensing blade to the periphery of the sensing blade. The electronic water meter according to claim 7, wherein a convex circular platform is formed at the center of the top surface of the sensing blade, and the circumference of the circular platform is radially outward to form a spiral and There are a plurality of wire grooves with a gradually decreasing height, and one of the magnetic conductive units is arranged at each of the wire grooves adjacent to the periphery of the top surface. The electronic water meter according to claim 7, wherein each of the magnetic permeable units is a circular pie piece, a fan-shaped piece, an annular insert, a radial piece or a rectangular piece. The electronic water meter according to claim 1, wherein the induction blade is cut into n parts, of which m parts have magnetic permeability; the other nm parts have the same material and do not have magnetic permeability; the relational expression is 0< m<n, 2≦n. The electronic water meter according to claim 1, wherein the sensing blade is cut into n parts, and the area of each cut part is A+B, where the area A has magnetic permeability; the area B does not have magnetic permeability; 2≦n. The electronic water meter according to claim 1, wherein the induction blade is cut into n parts, of which m parts of magnetically permeable materials have a first type of plane height; other nm non-magnetic materials have a second type of plane height ; Its relational expression is 0<m<n, 2≦n. The electronic water meter according to claim 1, wherein an antenna connector is screwed on a side wall of the waterproof housing, and the antenna connector is connected to the sensing circuit. The electronic water meter according to claim 1, further comprising a lower housing, the fluid module is accommodated in the lower housing, the fluid module further includes a drainage carrier, the sensing blade and the impeller are accommodated In the drainage carrier, the drainage carrier includes a first drainage hole and a second drainage hole, the first drainage hole is disposed under the second drainage hole; when the fluid enters the When the casing is lowered, the fluid first enters the fluid module through the first drainage hole, and then, after the fluid drives the impeller to rotate, the fluid leaves the fluid module through the second drainage hole, and the fluid flows from the fluid module through the second drainage hole. The other end of the lower casing leaves the lower casing. The electronic water meter according to claim 1, wherein the sensing module further includes a display control module and an upper cover; the display control module is disposed on the sensing circuit and the battery, and is fixed on the waterproof On the inner wall of the housing, the display control module displays the fluid signal; the upper cover includes an annular body and a transparent cover plate, the periphery of the transparent cover plate is sandwiched between the annular body and the waterproof housing.

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