CN108375403A - A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter - Google Patents
A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter Download PDFInfo
- Publication number
- CN108375403A CN108375403A CN201810502611.4A CN201810502611A CN108375403A CN 108375403 A CN108375403 A CN 108375403A CN 201810502611 A CN201810502611 A CN 201810502611A CN 108375403 A CN108375403 A CN 108375403A
- Authority
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- China
- Prior art keywords
- water meter
- magnet steel
- electronic water
- iot
- gear
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
- G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention provide a kind of electronic water meter based on NB IOT can Speed control mechanism and electronic water meter, including blade wheel, magnet steel and sensor；It further include the constant speed component coordinated with blade wheel；Magnet steel is set on constant speed component；Constant speed component passes through the revolution with blade wheel cooperation for recording blade wheel indirectly；Sensor records the revolution of blade wheel by the magnet steel incuded on constant speed component.Electronic water meter provided by the invention based on NB IOT can Speed control mechanism, by the way that constant speed component is arranged inside water meter movement, constant speed component slows down to the evolution speed of magnet steel, to reduce the speed that sensor acquires signal so that sensor saves energy.Using the electronic water meter provided by the invention based on NB IOT can Speed control mechanism electronic water meter, the electric energy consumed in the sensor units time can be saved, without often replacing the power supply in water meter.
Description
Technical field
The present invention relates to instrumentation technical field, more particularly to a kind of electronic water meter based on NB-IOT can constant speed machine
Structure and electronic water meter.
Background technology
Existing radio remote transmitting water meter uses NB-IOT technologies, and magnet steel and sensor are usually installed on water meter movement
Inside, magnet steel are installed on the gear shaft of blade wheel, and when flow flows through water meter movement, blade wheel rotation drives magnet steel rotation, passes
The number that sensor is shifted one's position by inductive magnetic steel, measures water consumption.But magnet steel is installed on to the gear of blade wheel
On axis, when flow flows through, blade wheel velocity of rotation is exceedingly fast, and causes sensor gathered data heavy workload, consumption electric flux excessive；
Since blade wheel is larger, when flow is bigger to be flowed through, often there is horizontal shake, causes sensor gathered data unstable
It is fixed.
On the other hand, existing wireless remote transmission anti-theft water meter needs band there are two power supply, and one of power supply is used to pass
Sensor, display device etc. provide electric energy；Another power supply is used to provide electric energy for communication device.Current wireless remote transmission safety water
In table, the power supply for providing electric energy for sensor, display device is typically disposed in inside watermeter shell；And it is used for as communication device
In the battery accommodating chamber for the outside that the power supply for providing electric energy is placed in watermeter shell.But the external water meter for being provided with battery accommodating chamber
Shell cannot be satisfied the requirement of national standard.
Invention content
To solve the above problems, the present invention provide a kind of electronic water meter based on NB-IOT can Speed control mechanism, including leaf
Piece wheel, magnet steel and sensor；
It further include the constant speed component coordinated with the blade wheel；The magnet steel is set on the constant speed component；It is described fixed
Fast component passes through the revolution with blade wheel cooperation for recording the blade wheel indirectly；The sensor passes through described in induction
The magnet steel on constant speed component records the revolution of the blade wheel.
Further, the constant speed component is stage-geared structure.
Further, the blade wheel is equipped with first gear；The constant speed component includes second gear；Second tooth
The number of teeth of wheel is not less than the number of teeth of the first gear；The first gear is meshed with the second gear.
Further, the magnet steel is located at the inside of the second gear.
Further, the magnet steel includes the poles S magnet steel and the poles N magnet steel；The poles S magnet steel and the poles N magnet steel are symmetrically distributed
In the both sides of the wheel shaft of the second gear.
Further, the both ends of the wheel shaft of the second gear lower surface with separator upper surface and sealing cover respectively
Connection；The second gear is rotated freely in the separator upper surface and the lower surface of the sealing cover.
The present invention also provides a kind of electronic water meters based on NB-IOT, using as above any electricity based on NB-IOT
Sub- water meter can Speed control mechanism；
It is equipped with power capacity chamber on the outside of the water meter outer cover of the electronic water meter.
Further, the water meter outer cover is equipped with wire through-hole；The wire through-hole connects the interior of the water meter outer cover
The inner space of side space and the power capacity chamber.
Further, the sensor is located at the outside of the constant speed component；When the constant speed component rotates, the magnetic
Steel is opposite with the position discontinuity of the sensor.
Further, the blade wheel is equipped with first gear；The constant speed component includes second gear；First tooth
Wheel is meshed with the second gear；The magnet steel is located in the second gear；When the first gear drives described second
When gear rotates, the magnet steel is opposite with the position discontinuity of the sensor.
Electronic water meter provided by the invention based on NB-IOT can Speed control mechanism, it is fixed by being arranged inside water meter movement
Fast component, for constant speed component by coordinating with blade wheel, magnet steel records the revolution of the blade wheel indirectly, and sensor is fixed by incuding
The revolution of magnet steel record blade wheel on fast component, to reduce the speed that sensor acquires signal so that sensor saves energy
Amount.Using the electronic water meter provided by the invention based on NB-IOT can Speed control mechanism electronic water meter, sensor can be saved
The electric energy consumed in unit interval, without often replacing the power supply in water meter.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 can Speed control mechanism assembling schematic diagram for the electronic water meter provided by the invention based on NB-IOT；
Fig. 2 is constant speed component structure diagram in Fig. 1
Fig. 3 is the electronic water meter structural schematic diagram provided by the invention based on NB-IOT；
Fig. 4 is water meter cover structure schematic diagram in Fig. 3.
Reference numeral：
10 blade wheel, 11 first gear, 20 magnet steel
30 sensor, 40 second gear, 50 separator
60 sealing cover, 70 water meter outer cover, 71 power capacity chamber
72 wire through-holes
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
Fig. 1 be the electronic water meter provided by the invention based on NB-IOT can Speed control mechanism assembling schematic diagram, such as Fig. 1 institutes
Show：Electronic water meter based on NB-IOT can Speed control mechanism, including blade wheel 10, magnet steel 20 and sensor 30；
It further include the constant speed component coordinated with the blade wheel 10；The magnet steel 20 is set on the constant speed component；Institute
It states constant speed component and passes through the revolution with the cooperation of the blade wheel 10 for recording the blade wheel 10 indirectly；The sensor 30 is logical
It crosses and incudes the revolution that the magnet steel 20 on the constant speed component records the blade wheel 10.
When it is implemented, magnet steel 20 is placed in constant speed component, position when magnet steel 20 can be as the rotation of constant speed component
Variation mark is set, when sensor 30 is opposite with 20 position of magnet steel, the magnetic induction of sensor 30 and magnet steel 20, acquisition blade wheel 10
Revolution.
Electronic water meter provided by the invention based on NB-IOT can Speed control mechanism, it is fixed by being arranged inside water meter movement
Fast component, for constant speed component by coordinating with blade wheel, magnet steel records the revolution of the blade wheel indirectly, and sensor is fixed by incuding
The revolution of magnet steel record blade wheel on fast component, to reduce the speed that sensor acquires signal so that sensor saves energy
Amount.Using the electronic water meter provided by the invention based on NB-IOT can Speed control mechanism electronic water meter, sensor can be saved
The electric energy consumed in unit interval, without often replacing the power supply in water meter.
Be preferably based on the electronic water meter of NB-IOT can Speed control mechanism, including blade wheel 10, magnet steel 20 and sensor
30；The magnet steel 20 is sent to the sensor 30 for the rotation information by blade wheel 10；
It further include constant speed component；The magnet steel 20 is set on the constant speed component；The constant speed component is to the magnet steel
20 evolution speed is slowed down；The sensor 30 is for incuding evolution information after the magnet steel 20 slows down.
When it is implemented, magnet steel 20 is placed in constant speed component, to will evolution speed and blade in the prior art
The identical magnet steel 20 of rotating speed of wheel 10 carries out reduction of speed so that the speed of 30 gathered data of sensor reduces, therefore and reaches energy saving
Purpose.
Electronic water meter provided by the invention based on NB-IOT can Speed control mechanism, it is fixed by being arranged inside water meter movement
Fast component, constant speed component slow down to the evolution speed of magnet steel, to reduce the speed that sensor acquires signal so that
Sensor saves energy.
Preferably, the constant speed component is stage-geared structure.
When it is implemented, the gear drives such as secondary gear, three pole gears, level Four gear, magnetic can be used in constant speed component
Steel 20 is located on the wheel shaft of the outermost side gear of multi-stage gear, to reduce impact of the flow to gear, more stably records leaf
The revolution of piece wheel 10 records water consumption.
Preferably, as depicted in figs. 1 and 2：The blade wheel 10 is equipped with first gear 11；The constant speed component includes the
Two gears 40；The number of teeth of the second gear 40 is not less than the number of teeth of the first gear 11；The first gear 11 with it is described
Second gear 40 is meshed.
Preferably, the diameter of the second gear 40 is more than the diameter of the first gear 11.
Preferably, the magnet steel 20 is located at the inside of the second gear 40.
Preferably, the magnet steel 20 includes the poles S magnet steel and the poles N magnet steel；The poles S magnet steel and the poles N magnet steel are symmetrically distributed
In the both sides of the wheel shaft of the second gear 40.
When it is implemented, with the number of teeth of the first gear 11 on blade wheel 10 for 10, the number of teeth of second gear 40 is 50
It is a.If using the prior art, magnet steel 20 is placed in first gear 11, when flow flows through water meter movement, then with blade
The rotation of wheel 10, the evolution speed of magnet steel 20 is equal with the velocity of rotation of blade wheel 10, to which sensor 30 acquires magnet steel
The speed of 20 evolution information is also consistent with the velocity of rotation of blade wheel 10, and the velocity of rotation of blade wheel 10 is larger, leads
Sensor 30 is caused to consume more energy；
And use the electronic water meter provided by the invention based on NB-IOT can Speed control mechanism, magnet steel 20 is placed in the second tooth
On wheel 40, when first gear 11 turns over 1 turn, the second gear 40 being meshed with first gear 11 only turns over 0.2 turn, to
The evolution speed of magnet steel 20 is reduced by 5 times compared with the prior art, therefore, sensor 30 acquires the evolution information of magnet steel 20
Speed also reduce by five times, the energy that sensor 30 consumes substantially reduces.
The number of teeth of first gear 11 is equal to the number of teeth of second gear 40, when flow flows through water meter movement, 10 turns of blade wheel
Dynamic, the rotating speed of first gear 11 can with constant speed pass to second gear 40, and second gear 40 is not directly by flow
Impact, to which the magnet steel 20 in second gear 40 can more stably reflect the revolution of blade wheel 10, therefore sensor 30 can be with
The revolution for more stably recording blade wheel 10, reduces error.
Preferably, the both ends of the wheel shaft of the second gear 40 respectively under 50 upper surface of separator and sealing cover 60
Surface connects；The second gear 40 is rotated freely in 50 upper surface of the separator and the lower surface of the sealing cover 60.
When it is implemented, separator 50 constitutes the holder of second gear 40 with sealing cover 60 so that 40 turns of second gear
It when dynamic, will not be swung left and right, will not lead to that 30 collected data of sensor are wrong or error is larger.
The present invention provides a kind of electronic water meter based on NB-IOT, as shown in Figure 3 and Figure 4：Using as above arbitrary described
Electronic water meter based on NB-IOT can Speed control mechanism；
70 outside of water meter outer cover of the electronic water meter is equipped with power capacity chamber 71.
Existing wireless remote transmission anti-theft water meter needs band there are two power supply, and one of power supply is used for as sensor, display
Device etc. provides electric energy；Another power supply is used to provide electric energy for communication device.In current wireless remote transmission anti-theft water meter, it is used for
The power supply that electric energy is provided for sensor, display device is typically disposed in inside watermeter shell；And it is used to provide electric energy for communication device
The power supply outside that is placed in watermeter shell battery accommodating chamber in.But the external watermeter shell for being provided with battery accommodating chamber, nothing
Method meets the requirement of national standard.Therefore, provided by the invention to be arranged in the outside of water meter outer cover 70 based on the electronic water meter of NB-IOT
Power capacity chamber 71 provides the power supply of electric energy for being placed as communication device so that watermeter shell still conforms to national standard, and makes
Such water meter remains to two power supplys of setting.
Preferably, the water meter outer cover 70 is equipped with wire through-hole 72；The wire through-hole 72 connects the water meter outer cover
The inner space of 70 inner space and the power capacity chamber 71.
When it is implemented, the conducting wire that is attached of the electronic component in power supply and water meter in power capacity chamber 71 is from leading
Line three-way hole 72 passes through.
Preferably, the sensor 30 is located at the outside of the constant speed component；When the constant speed component rotates, the magnetic
Steel 20 is opposite with the position discontinuity of the sensor 30.
When it is implemented, sensor 30 is located at the outside of constant speed component, magnet steel 20 is set on constant speed component, flow is worked as
When by water meter movement, constant speed component is rotated with blade wheel 10 and is rotated, the position of magnet steel 20 and sensor 30 on constant speed component
It is opposite to set discontinuity, to when sensor 30 is by generation magnetic induction opposite with 20 position of magnet steel, record blade wheel 10 indirectly
Revolution, to record water consumption.
Preferably, the blade wheel 10 is equipped with first gear 11；The constant speed component includes second gear 40；Described
One gear 11 is meshed with the second gear 40；The magnet steel 20 is located in the second gear 40；When the first gear
When the 11 drive second gears 40 rotate, the magnet steel 20 is opposite with the position discontinuity of the sensor 30.
Although more herein used such as blade wheel, gear, magnet steel, sensor, separator, sealing cover, electricity
Source accommodating chamber, the terms such as wire through-hole, but it does not preclude the possibility of using other terms.The use of these items is only for
More easily describe and explain the essence of the present invention；It is construed as any one of the additional limitations all and is and spirit of that invention
It disagrees.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. a kind of electronic water meter based on NB-IOT can Speed control mechanism, including blade wheel, magnet steel and sensor；Its feature exists
In：
It further include the constant speed component coordinated with the blade wheel；The magnet steel is set on the constant speed component；The constant speed group
Part passes through the revolution with blade wheel cooperation for recording the blade wheel indirectly；The sensor is by incuding the constant speed
The magnet steel on component records the revolution of the blade wheel.
2. the electronic water meter according to claim 1 based on NB-IOT can Speed control mechanism, it is characterised in that：The constant speed
Component is stage-geared structure.
3. the electronic water meter according to claim 2 based on NB-IOT can Speed control mechanism, it is characterised in that：The blade
Wheel is equipped with first gear；The constant speed component includes second gear；The number of teeth of the second gear is not less than first tooth
The number of teeth of wheel；The first gear is meshed with the second gear.
4. the electronic water meter according to claim 3 based on NB-IOT can Speed control mechanism, it is characterised in that：The magnet steel
Positioned at the inside of the second gear.
5. the electronic water meter according to claim 4 based on NB-IOT can Speed control mechanism, it is characterised in that：The magnet steel
Including the poles S magnet steel and the poles N magnet steel；The poles S magnet steel and the poles N magnet steel be symmetrically distributed in the second gear wheel shaft two
Side.
6. according to electronic water meter of the claim 2-5 any one of them based on NB-IOT can Speed control mechanism, it is characterised in that：
The both ends of the wheel shaft of the second gear are connect with the lower surface of separator upper surface and sealing cover respectively；The second gear
It is rotated freely in the separator upper surface and the lower surface of the sealing cover.
7. a kind of electronic water meter based on NB-IOT, it is characterised in that：It is based on using as claimed in any one of claims 1 to 6
The electronic water meter of NB-IOT can Speed control mechanism；
It is equipped with power capacity chamber on the outside of the water meter outer cover of the electronic water meter.
8. the electronic water meter according to claim 7 based on NB-IOT, it is characterised in that：The water meter outer cover is equipped with and leads
Line three-way hole；The wire through-hole connects the inner space of the water meter outer cover and the inner space of the power capacity chamber.
9. the electronic water meter according to claim 7 based on NB-IOT, it is characterised in that：It is described fixed that the sensor is located at
The outside of fast component；When the constant speed component rotates, the magnet steel is opposite with the position discontinuity of the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810502611.4A CN108375403A (en) | 2018-05-23 | 2018-05-23 | A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810502611.4A CN108375403A (en) | 2018-05-23 | 2018-05-23 | A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108375403A true CN108375403A (en) | 2018-08-07 |
Family
ID=63033600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810502611.4A Pending CN108375403A (en) | 2018-05-23 | 2018-05-23 | A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108375403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801372A (en) * | 2018-08-28 | 2018-11-13 | 福水智联技术有限公司 | Improve the remote transmitting water meter and its working method of impeller the operation is stable |
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| CN2359669Y (en) * | 1999-03-18 | 2000-01-19 | 郭建国 | Data-transmission type water meter |
| CN103234594A (en) * | 2013-04-25 | 2013-08-07 | 安徽翼迈智能仪表有限公司 | Wireless transmission system of wireless water meter |
| CN104048719A (en) * | 2014-06-30 | 2014-09-17 | 江苏赛达电子科技有限公司 | Water meter |
| CN104880230A (en) * | 2015-06-18 | 2015-09-02 | 成都千嘉科技有限公司 | Magnetic inducting type direct-reading system of liquid hermetic meter |
| CN206670713U (en) * | 2017-03-27 | 2017-11-24 | 三川智慧科技股份有限公司 | A kind of intellectual water meter signal acquisition structure |
| CN208443448U (en) * | 2018-05-23 | 2019-01-29 | 厦门市京准智能水表有限公司 | A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter |
-
2018
- 2018-05-23 CN CN201810502611.4A patent/CN108375403A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2359669Y (en) * | 1999-03-18 | 2000-01-19 | 郭建国 | Data-transmission type water meter |
| CN103234594A (en) * | 2013-04-25 | 2013-08-07 | 安徽翼迈智能仪表有限公司 | Wireless transmission system of wireless water meter |
| CN104048719A (en) * | 2014-06-30 | 2014-09-17 | 江苏赛达电子科技有限公司 | Water meter |
| CN104880230A (en) * | 2015-06-18 | 2015-09-02 | 成都千嘉科技有限公司 | Magnetic inducting type direct-reading system of liquid hermetic meter |
| CN206670713U (en) * | 2017-03-27 | 2017-11-24 | 三川智慧科技股份有限公司 | A kind of intellectual water meter signal acquisition structure |
| CN208443448U (en) * | 2018-05-23 | 2019-01-29 | 厦门市京准智能水表有限公司 | A kind of electronic water meter based on NB-IOT can Speed control mechanism and electronic water meter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801372A (en) * | 2018-08-28 | 2018-11-13 | 福水智联技术有限公司 | Improve the remote transmitting water meter and its working method of impeller the operation is stable |
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