Intelligent water meter

Abstract

The invention discloses an intelligent water meter with an electronic data acquisition mechanism and a water meter appearance direct-reading character wheel mechanism independent of each other. Comprising a base meter, the base meter is composed of a meter shell, a movement base, a counter assembly and a meter cover, a glass cover for sealing the counter assembly in the base meter is arranged between the meter cover and the movement base, the meter cover is provided with an external circuit module installed through a quick release structure, a concave cavity is formed in one side in a circuit board base of the external circuit module, and the counter assembly is arranged in the cavity. And a circuit board of the intelligent water meter is packaged in the cavity. The appearance form of the water meter is similar to that of a traditional product, and the water meter is easily accepted by users and is suitable for large-scale production and low in production cost; the device has good sealing and waterproof functions, and is high in adaptability to the installation environment. The external circuit module and the base meter adopt a quick-release building block type structure, so that the device is suitable for mechanical base meters with different calibers, is suitable for transformation and manufacturing, and is high in universality; the electronic mechanism and the direct reading mechanism are arranged independently, and the collected electronic metering data are continuous values.

Description

Technical Field

[0001] The invention relates to an intelligent water meter, in particular to a wet direct-reading water meter used in the Internet of Things. Background Art

[0002] The wet direct-reading remote water meter in the prior art usually includes a digital, pointer-type counter assembly and a magnetic coupling acquisition circuit for collecting the character wheel data in the digital counter assembly. The counter assembly is immersed in the water in the meter case, and a waterproof board is provided in the meter case. The magnetic coupling acquisition circuit is arranged on the waterproof board in a waterproof sealing manner. Then, the counter assembly and the magnetic coupling acquisition circuit are packaged together in a water meter cavity with a glass cover. This structure has the following defects:

[0003] 1. When the magnetic coupling acquisition circuit has problems and needs to be repaired or replaced, it is inconvenient to disassemble and assemble.

[0004] 2. In the process of standardized management of water meters, it is necessary to regularly disassemble and inspect or update the water meters. However, the above structure usually fixes the magnetic coupling acquisition circuit in the meter case through sealing glue, which is not conducive to disassembly for regular management. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an intelligent water meter in which an electronic data acquisition mechanism and a water meter surface direct reading character wheel mechanism are independent of each other.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The smart water meter of the present invention comprises a base meter, which is composed of a meter case, a movement seat, a counter assembly and a meter cover. A glass cover is provided between the meter cover and the movement seat to seal the counter assembly in the base meter. The invention is characterized in that the counter assembly comprises a pointer-type counter assembly and a digital counter assembly. An external circuit module installed by a quick-release structure is provided on the meter cover, and a recessed cavity is provided on one side of the circuit board seat of the external circuit module. The circuit board of the smart water meter used for collecting water meter measurement data and transmitting the data for communication is encapsulated in the cavity.

[0008] A group of gear transmission mechanisms are arranged along the peripheral direction of the upper splint in a narrow space between the upper splint and the lower splint of the counter assembly and outside the character wheel assembly. The starting gear of the gear transmission mechanism is meshed with the transmission gear corresponding to one-tenth of the metering value of the pointer-type metering assembly, and the tail gear of the gear transmission mechanism is a units-digit remote transmission gear corresponding to the units-digit metering value.

[0009] A second group of gear transmission mechanisms is also provided at the tail end of the gear transmission mechanism and is arranged along the peripheral direction of the upper clamping plate. The starting gear of the second group of gear transmission mechanisms is meshed with the ones-digit remote transmission gear, and the tail end of the second group of gear transmission mechanisms is a tens-digit remote transmission gear corresponding to the tens-digit measurement value.

[0010] At the tail end of the second gear transmission mechanism, a third gear transmission mechanism is arranged along the peripheral direction of the upper clamping plate. The starting gear of the third gear transmission mechanism is meshed with the tens remote transmission gear, and the tail end of the third gear transmission mechanism is the hundreds remote transmission gear corresponding to the hundreds measurement value.

[0011] A plastic shaft end seat is provided at the upper end of the gear shaft of the ones-digit remote transmission gear, the tens-digit remote transmission gear and / or the hundreds-digit remote transmission gear, a magnetic sheet is provided in the central recess of the shaft end seat, and an anti-magnetic ring is provided in the annular groove outside the magnetic sheet to prevent the external magnetic field from interfering with the magnetic field generated by the magnetic sheet. Correspondingly, an angular displacement sensor is provided at the upper and lower positions corresponding to the magnetic sheet on the circuit board, and the angular displacement sensor is electrically connected to the remote transmission control circuit on the circuit board.

[0012] Next to the minimum value gear corresponding to the one-ten-thousandth measurement value in the pointer-type metering assembly, there is a warning gear that can monitor sudden changes in the user's daily water consumption habits. A circular warning dial is sleeved on the upper end of the gear shaft, and a magnetic block is provided on the side of the warning dial. Correspondingly, a magnetic sensor is provided at the upper and lower positions corresponding to the magnetic block on the circuit board, and the magnetic sensor is electrically connected to the remote control circuit on the circuit board.

[0013] Compared with the prior art, the smart water meter of the present invention has the following advantages: the appearance of the water meter of the present invention is similar to that of traditional products, which is easy for users to accept, suitable for large-scale production, and has low production cost; the circuit board for collecting electronic data is potted with potting glue, which has good sealing and waterproof functions and strong adaptability to the installation environment; its external circuit module and base meter adopt a quick-disassembly building block structure, which is suitable for mechanical base meters of different calibers, suitable for modification and manufacturing, and has strong versatility; the electronic mechanism and the direct reading mechanism are independently arranged, and the collected electronic metering data is a continuous value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the smart water meter of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the explosion and reduction.

[0016] Figure 3 yes Figure 2 Schematic diagram of the circuit board holder in the figure.

[0017] Figure 4 yes Figure 2 Schematic diagram of the counter component and circuit board separation setup in .

[0018] Figure 5 yes Figure 4 Schematic diagram of the plane after removing the upper splint.

[0019] Figure 6 yes Figure 5 Enlarged diagram of the warning gear in the figure.

[0020] Figure 7 yes Figure 5 An enlarged schematic diagram of the units-digit remote transmission gear.

[0021] Figure 8 yes Figure 5 An enlarged schematic diagram of the ten-bit telemetry gear.

[0022] Fig. 9 yes Figure 5 An enlarged schematic diagram of the hundred-bit telemetry gear.

[0023] Reference numerals

[0024] Base meter 1, watch case 11, movement seat 12, glass cover 13, locking pin hole 131, accommodating cavity 132, watch cover 14, counter assembly 2, upper splint 21, lower splint 22, pointer counter 23, plum blossom wheel 24, window 25 of digital counter, units remote transmission gear 31, tens remote transmission gear 32, hundreds remote transmission gear 33, warning gear 4, warning turntable 41, magnetic block 42, shaft end seat 5, groove 51, anti-magnetic ring 52, magnetic sheet 53, external circuit module 6, circuit board seat 61, cavity 62, positioning column 63, cover 64, water meter cover 65, circuit board 7, angular displacement sensor 71, positioning hole 72, magnetic sensor 73, smart water meter 100. DETAILED DESCRIPTION

[0025] I. Overview

[0026] like Figure 1-4 As shown, the smart water meter 100 of the present invention is composed of a base meter 1 and an external circuit module 6. The base meter 1 can be used alone as a wet direct-reading water meter for measuring water consumption data, and the external circuit module 6 is a module that collects and transmits electronic data through magnetic coupling with a magnetic sheet 53 installed in the base meter 1.

[0027] The base meter 1 includes a case 11 (a water inlet and a water outlet are provided on the case 11, and the upper end surface of the case 11 is open), a movement seat 12, a counter assembly 2, a glass cover 13 (not shown in the figure) and a meter cover 14, wherein the counter assembly 2 includes a water meter surface direct reading mechanism (hereinafter referred to as the direct reading mechanism, including a pointer counter 23 and a digital counter) and a counting module in an electronic data acquisition mechanism (hereinafter referred to as the electronic mechanism).

[0028] The external circuit module 6 includes a circuit board seat 61 , a circuit board 7 , a cover 64 and a water meter cover 65 .

[0029] The counter assembly 2 is installed in the movement seat 12 , and the circuit board 7 in the electronic mechanism for collecting water meter measurement data and transmitting the data for communication is packaged on the circuit board seat 61 .

[0030] During installation, the movement seat 12 with the counter assembly 2 is first assembled in the watch case 11 and fixed, and a sealing ring is placed between the glass cover 13 and the movement seat 12 to prevent water from leaking out of the watch case 11. Then, the circuit board seat 61 with the circuit board 7 is installed on the watch cover 14 through a quick release structure and tightened and locked. Then, the cover 64 is buckled on the circuit board seat 61 and the wires connected to the circuit board 7 are led out. Finally, the water meter cover 65 is buckled on the cover 64.

[0031] The above structure has the following advantages:

[0032] 1. When the circuit board 7 or the counter assembly 2 needs to be repaired or replaced, it is only necessary to unlock and separate the external circuit module 6 from the base meter 1.

[0033] 2. Since the external circuit module 6 and the base meter 1 are connected together using a quick disassembly and assembly structure, when the water meter system needs to be included in the standardized management system for management, each water meter needs to be disassembled, inspected or updated regularly. The above structure greatly facilitates management and reduces management costs.

[0034] 3. The above structure can perform online maintenance on the circuit board 7 of the water meter in use without affecting the normal operation of the base meter 1. It is the first of its kind in wet direct-reading remote water meters.

[0035] 2. Base Table 1

[0036] 1. Case 11

[0037] The watch case 11 is made of copper, ductile iron, plastic or stainless steel, and a water flow direction indicator is arranged on the outer surface of the watch case 11 .

[0038] 2. Movement seat 12

[0039] An impeller assembly and an impeller cover are provided below the movement seat 12 . The upper end of the impeller shaft of the impeller assembly is inserted into the counter assembly 2 and transmits power to the counter assembly 2 .

[0040] 3. Table cover 14

[0041] It is preferably made of stainless steel, and is a cylinder with an annular pressed edge. A thread is provided on the inner side of the cylinder, which can be connected with the thread of the outer wall of the upper port of the case 11.

[0042] 4. Glass cover 13

[0043] The glass cover 13 is made of organic glass, which is arranged in the cylinder and abuts against the inner side of the annular pressing edge. A sealing ring is provided around the glass cover 13 to prevent water in the watch case 11 from leaking out.

[0044] A blind hole is provided on the top side of the glass cover 13 , which is referred to as a locking pin hole 131 hereinafter.

[0045] Four accommodating cavities 132 recessed into the glass cover are provided on the inner side surface of the glass cover 13 , and a plurality of buckle notches and buckle grooves are provided on the side wall of the glass cover 13 .

[0046] A positioning structure is provided between the periphery of the glass cover 13 and the upper end of the movement seat 12 to prevent the glass cover 13 from rotating freely.

[0047] 5. Counter component 2

[0048] like Figure 2 , Figure 4 and Figure 5 As shown, the counter assembly 2 includes an upper clamping plate 21 and a lower clamping plate 22 , and the direct reading mechanism and the electronic mechanism are arranged between the upper clamping plate 21 and the lower clamping plate 22 .

[0049] 1) Upper splint 21

[0050] A pointer counter 23 is provided on one side of the top surface of the upper splint 21, which includes dials and corresponding pointers for measuring one tenth, one hundredth, one thousandth and one ten-thousandth of a cubic meter. Each pointer is connected to a low-position gear transmission mechanism through a corresponding gear shaft (this solution is the prior art), and the gear for one ten-thousandth of a cubic meter is connected to the impeller gear through the impeller gear transmission mechanism.

[0051] A plum blossom wheel 24 is provided in the middle area of ​​the upper clamping plate 21 to indicate whether the impeller is rotating.

[0052] A window 25 for displaying a digital counter is provided on the other side of the top surface of the upper clamping plate 21. The character wheel group in the digital counter displays the order of magnitude including units, tens, hundreds, thousands and ten thousand cubic meters.

[0053] The remote transmission gear assembly in the electronic mechanism is arranged around the area on the other side of the top surface of the upper clamping plate 21. The present invention preferably arranges three remote transmission gear assemblies to collect data of units, tens and hundreds of cubic meters respectively. The three remote transmission gear assemblies are arranged at a certain distance to avoid mutual interference.

[0054] A warning dial 41 is provided on the top surface of the upper clamping plate 21 near the side of the 1 / 10,000 cubic meter dial to monitor sudden changes in the user's daily water consumption habits. The warning dial 41 is round and made of plastic.

[0055] 2) Direct reading institutions

[0056] The pointers in the pointer counter 23 are meshed with each other through corresponding low-position gear transmission mechanisms, wherein the gear corresponding to the tenth pointer meshes with the driven teeth on the low-position side of the units wheel in the wheel set through the worm gear.

[0057] In the character wheel group, the side of the lower character wheel in the two adjacent character wheels that is opposite to the higher character wheel is called the higher side face of the lower character wheel, and the side of the higher character wheel that is opposite to the lower character wheel is called the lower side face of the higher character wheel.

[0058] Twenty driven teeth are evenly spaced around the low side of each character wheel, and two driving teeth are arranged on the high side of the character wheel. When the low character wheel rotates one circle, the high side driving gear of the low character wheel drives the driven teeth on the low side of the high character wheel to move one position through the 48-tooth wheel.

[0059] 3) Electronic mechanism

[0060] The electronic mechanism is composed of the circuit board 7 and a counting module, and the counting module includes the three remote transmission gear assemblies.

[0061] a. Remote transmission gear assembly

[0062] Three remote transmission gear assemblies are arranged between the upper clamping plate 21 and the lower clamping plate 22 and in a narrow space outside the character wheel group, and a group of gear transmission mechanisms are arranged along the peripheral direction of the upper clamping plate 21. This arrangement can separate the electronic mechanism counting from the direct reading mechanism counting, and the electronic mechanism counting data can be continuously collected.

[0063] The direct reading mechanism is a character wheel group, and the character wheels are carried forward through 48-tooth wheels. The teeth on the side of the 48-tooth wheel connected to the high-position character wheel are flush and mesh with the driven teeth of the high-position character wheel. The teeth on the other side of the 48-tooth wheel connected to the low-position character wheel are one long and one short. When the low-position character wheel rotates from the number 9 to 0, the low-position character wheel is always in a continuous rotation state, while the number to be carried forward on the high-position character wheel is displayed in a jump-like manner. The reason is that since the water continues to flow, when preparing to carry forward, there is inevitably a distance margin before the active teeth and the long teeth mesh and collide, resulting in a very short time of non-reaction of the character wheel group. After the active teeth and the long teeth mesh, the displayed numbers jump, resulting in a temporary inconsistency between the actual flow and the intuitive reading.

[0064] After the electronic mechanism counting and the direct reading mechanism counting are separated from each other, the collected electronic data can be made into continuous values.

[0065] The following are the three preferred teletransmission gear sets:

[0066] ● Single-digit remote transmission gear set for collecting single-digit cubic meter data

[0067] like Figure 5 , 7 As shown, the units remote transmission gear set includes a units remote transmission gear 31 and a units intermediate gear set. Preferably, the present invention has one units intermediate gear set, the disc teeth of the units intermediate gear are meshed with the transmission gear corresponding to one-tenth of the metering value of the pointer-type metering assembly, and the shaft teeth of the units intermediate gear are meshed with the upper disc teeth of the units remote transmission gear 31.

[0068] At the upper end of the gear shaft of the single-digit remote transmission gear 31, a plastic shaft end seat 5 is inserted, a magnetic piece 53 is provided in the central recess of the shaft end seat 5, and an anti-magnetic ring 52 is provided in the annular groove 51 outside the magnetic piece 53 to prevent the external magnetic field from interfering with the magnetic field generated by the magnetic piece 53. Correspondingly, an angular displacement sensor 71 magnetically coupled to the magnetic piece 53 is provided at the upper and lower positions corresponding to the magnetic piece 53 on the circuit board 7, and the angular displacement sensor 71 is electrically connected to the remote transmission control circuit on the circuit board 7.

[0069] ●Ten-digit telemetry gear set for collecting ten-digit cubic meter data

[0070] like Figure 5 , 8 As shown, the tens remote transmission gear set includes a tens remote transmission gear 32 and a tens intermediate gear set. Preferably, the tens intermediate gear set is composed of three transition gears, the first transition gear is meshed with the lower plate teeth of the ones remote transmission gear 31, the three transition gears are meshed in sequence, and the third transition gear is meshed with the upper plate teeth of the tens remote transmission gear 32.

[0071] At the upper end of the gear shaft of the tens-digit remote transmission gear 32, there is also a shaft end seat 5 with the same structure as the shaft end seat 5 of the ones-digit remote transmission gear, and the same magnetic sheet 53 and anti-magnetic ring 52 are also provided on the shaft end seat 5. Correspondingly, an angular displacement sensor 71 magnetically coupled with the magnetic sheet 53 of the tens-digit remote transmission gear 32 is also provided on the circuit board 7.

[0072] ● Hundreds of remote transmission gear sets that collect hundreds of cubic meters of data

[0073] like Figure 5 , 9 The hundreds-position remote transmission gear set shown includes a hundreds-position remote transmission gear 33 and a hundreds-position intermediate gear set. Preferably, the hundreds-position intermediate gear set is three transition gears, the first transition gear is meshed with the lower plate teeth of the tens-position remote transmission gear 32, the three transition gears are meshed in sequence, and the third transition gear is meshed with the hundreds-position remote transmission gear 33.

[0074] At the upper end of the gear shaft of the hundreds-digit remote transmission gear 33, there is also a shaft end seat 5 with the same structure as the shaft end seat 5 of the ones-digit remote transmission gear. The same magnetic sheet 53 and anti-magnetic ring 52 are also provided on the shaft end seat 5. Correspondingly, an angular displacement sensor 71 magnetically coupled with the magnetic sheet 53 of the hundreds-digit remote transmission gear 33 is also provided on the circuit board 7.

[0075] When the glass cover 13 is placed on the counter assembly 2 , the three shaft end seats 5 are accommodated in the corresponding accommodating cavities 132 .

[0076] b. Circuit board 7

[0077] The circuit board 7 is installed in a recessed cavity 62 arranged on one side of the base.

[0078] The circuit board 7 is used to collect the metering data of the three remote transmission gears and transmit the data to the water system management platform via wired or wireless means.

[0079] Angular displacement sensors 71 corresponding to the three remote transmission gears are installed at predetermined positions on the circuit board 7 .

[0080] A plurality of positioning holes 72 are also provided on the circuit board 7 .

[0081] 4) Warning dial 41

[0082] like Figure 5 , 6 As shown, beside the minimum value gear corresponding to one ten-thousandth of the measurement value in the pointer-type metering component, there is a warning gear 4 that can monitor sudden changes in the user's daily water consumption habits. The sudden changes include but are not limited to: when a pipeline leaks, it causes a continuous record of small flow; the user's water consumption fluctuates constantly, and suddenly there is no flow record for a certain period of time starting from a certain day, and an abnormal prompt can be issued to the management platform.

[0083] The warning gear 4 meshes with the minimum magnitude gear at a transmission ratio of 1:1.

[0084] A circular warning dial 41 is sleeved on the upper end of the warning gear 4 shaft, and a magnetic block 42 is provided on the side of the warning dial 41. Correspondingly, a magnetic sensor 73 is provided on the circuit board 7 at the upper and lower positions corresponding to the magnetic block 42, and the magnetic sensor 73 is electrically connected to the remote control circuit on the circuit board 7.

[0085] When the glass cover 13 is placed on the counter assembly 2 , the warning dial 41 is accommodated in the corresponding accommodation cavity 132 , and a gap is provided between the warning dial 41 and the inner wall of the accommodation cavity 132 .

[0086] 3. External circuit module 6

[0087] 1. Circuit board holder 61

[0088] The circuit board seat 61 is an integrally formed injection molded part, and its shape is an annular cylinder. A partition is provided at the inner upper port of the cylinder. The outer edge of the partition is connected to the cylinder wall as a whole. The inner side of the partition is provided with an inner wall in a "C" shape. The recessed area surrounded by the inner wall and the cylinder wall is the cavity 62 for installing the circuit board 7. The cavity 62 is provided with positioning columns 63 with the same number as the positioning holes 72. The circuit board 7 is fixed in the cavity 62 in a one-to-one corresponding and interlocking manner with the positioning holes 72 thereon and the positioning columns 63. The fixing method can be screws or sealing glue.

[0089] On the other side opposite to the partition is a hollow through which the direct reading mechanism can be observed.

[0090] When the circuit board holder 61 is mounted on the base table 1 , the angular displacement sensor 71 on the circuit board 7 can collect the rotation angle of the magnetic sheet 53 on the corresponding remote transmission gear in real time.

[0091] The quick-release structure is composed of a clamping block arranged on the inner side of the circuit board holder 61 and a clamping notch and a clamping groove arranged on the side wall of the glass cover 13. When the circuit board holder 61 needs to be fixed to the watch cover 14, the clamping block is first dropped into the clamping notch, and the circuit board holder 61 is rotated to make the clamping block stuck in the clamping groove, so that the circuit board holder 61 and the base watch 1 are fixed together.

[0092] The locking mechanism is composed of a locking pin hole 131 arranged on the surface of the glass cover 13 and a through hole and a pin arranged on the side of the circuit board holder 61. When the circuit board holder 61 and the base meter 1 are fixed together, the pin only needs to be inserted into the through hole and the locking pin hole 131 to lock the circuit board holder 61 and the base meter 1 to prevent free rotation caused by vibration of the water meter during use.

[0093] 2. Circuit board 7 (see the above introduction for details)

[0094] 3. Capping 64

[0095] The cover 64 is an integrally formed injection molded part, and a plurality of ear plates with through holes are provided on its peripheral wall. Correspondingly, the same number of threaded holes are provided on the peripheral wall of the circuit board seat 61, and the cover 64 can be fixed to the circuit board seat 61 by inserting screws into the through holes.

[0096] A cover plate capable of sealing the cavity 62 is provided on the cover 64 in an area opposite to the cavity 62 on the circuit board 7 .

[0097] The upper and lower positions of the cover 64 that are opposite to the hollowed-out area on the circuit board seat 61 are also hollowed out.

[0098] 4. Water meter cover 65

[0099] The water meter cover 65 is hinged to the sealing cover 64 by screws passing through screw holes provided in the cover plate, so that the water meter cover 65 is enclosed in the hollow area in a single-side open or closed manner.

Claims

1. A smart water meter, comprising a base meter (1), the base meter (1) comprising a meter case (11), a movement seat (12), a counter assembly (2) and a meter cover (14), a glass cover for sealing the counter assembly (2) in the base meter (1) is provided between the meter cover (14) and the movement seat (12), and characterized in that: The counter assembly (2) comprises a pointer-type counter (23), a counter assembly (2) and a digital counter assembly (2); an external circuit module (6) installed via a quick-release structure is provided on the meter cover (14); a recessed cavity (62) is provided on one side of a circuit board seat (61) of the external circuit module (6); a circuit board (7) of the smart water meter (100) for collecting water meter measurement data and transmitting the data via communication is encapsulated in the cavity (62).

2. The smart water meter according to claim 1, characterized in that: A group of gear transmission mechanisms are arranged along the circumference of the upper clamping plate (21) and the lower clamping plate (22) of the counter assembly (2) in a narrow space outside the character wheel assembly. The starting gear of the gear transmission mechanism is meshed with a transmission gear corresponding to one-tenth of the metering value of the pointer-type metering assembly, and the tail gear of the gear transmission mechanism is a remote transmission gear (31) corresponding to the metering value of the unit.

3. The smart water meter according to claim 2, characterized in that: A second group of gear transmission mechanisms is also provided at the tail end of the gear transmission mechanism and is arranged along the peripheral direction of the upper clamping plate (21). The starting gear of the second group of gear transmission mechanisms meshes with the ones-digit remote transmission gear (31), and the tail end of the second group of gear transmission mechanisms is a tens-digit remote transmission gear (32) corresponding to the tens-digit measurement value.

4. The smart water meter according to claim 3, characterized in that: A third gear transmission mechanism is also provided at the tail end of the second gear transmission mechanism and is arranged along the peripheral direction of the upper clamping plate (21). The starting gear of the third gear transmission mechanism is meshed with the tens remote transmission gear (32), and the tail end of the third gear transmission mechanism is a hundreds remote transmission gear (33) corresponding to the hundreds measurement value.

5. The smart water meter according to any one of claims 2 to 4, characterized in that: A plastic shaft end seat (5) is provided at the upper end of the gear shaft of the ones-digit remote transmission gear (31), the tens-digit remote transmission gear (32) and / or the hundreds-digit remote transmission gear (33). A magnetic sheet (53) is provided in a central recess of the shaft end seat (5). A magnetic shielding ring (52) is provided in a ring-shaped recess (51) outside the magnetic sheet (53) to prevent an external magnetic field from interfering with a magnetic field generated by the magnetic sheet (53). Correspondingly, an angular displacement sensor (71) is provided at a position corresponding to the upper and lower positions of the magnetic sheet (53) on the circuit board (7). The angular displacement sensor (71) is electrically connected to a remote transmission control circuit on the circuit board (7).

6. The smart water meter according to claim 5, characterized in that: A warning gear (4) capable of monitoring sudden changes in the user's daily water consumption habits is provided beside the minimum value gear corresponding to the one-tenth measurement value in the pointer-type metering component. A circular warning dial (41) is sleeved on the upper end of the gear shaft. A magnetic block (42) is provided on the side of the warning dial (41). Correspondingly, a magnetic sensor (73) is provided on the circuit board (7) at a position corresponding to the upper and lower positions of the magnetic block (42). The magnetic sensor (73) is electrically connected to a remote control circuit on the circuit board (7).

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