CN206362419U - A kind of online flowmeter for monitoring water (flow) direction and speed - Google Patents
A kind of online flowmeter for monitoring water (flow) direction and speed Download PDFInfo
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- CN206362419U CN206362419U CN201621296734.XU CN201621296734U CN206362419U CN 206362419 U CN206362419 U CN 206362419U CN 201621296734 U CN201621296734 U CN 201621296734U CN 206362419 U CN206362419 U CN 206362419U
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- flow
- rotating shaft
- permanent magnet
- stopper
- hemispherical shell
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Abstract
The utility model disclose it is a kind of monitor water (flow) direction and speed in linear flow rate, including：Housing, including test section；Flow sensing part, with a rotating shaft, the rotating shaft rotates around a fixing axle, one end of rotating shaft is provided with stopper, the other end of rotating shaft is provided with permanent magnet, stopper is located at outside housing and in tested pipeline, and the rotating shaft between stopper and fixing axle is connected to the port inner wall of test section by two symmetrically arranged flexible members；Hemispherical Shell, in test section and is open towards the port of test section, and inner side of the permanent magnet along hemispherical Shell is rotated；Hall sensor, the change in location for detecting permanent magnet；Circuit is detected, is connected with Hall sensor, the angle that the signal of change permanent magnet for being exported according to Hall sensor rotates, to obtain flow velocity and the flow direction of fluid.This online flowmeter supports water (flow) direction detection, low-power consumption sensitive to water supply flow jump reaction, low cost, easy for installation.
Description
Technical field
The utility model is related to distribution system of water supply technical field, more particularly to a kind of to monitor the online of water (flow) direction and speed
Flowmeter.
Background technology
Currently, the distribution system of water supply of central water supply engineering is from main pipe, branch's main to tip, and distributed areas are wide (reachable
Tens kilometers), also, pipe network is according to user distribution, there is different lift and trend.The monitoring of the distribution system of water supply is to ensuring safety
Reliable supply water has very important meaning.
The exception of the distribution system of water supply, such as leak, booster, pressure not enough, can all influence the safe water of user.In general,
Only it is to be understood that pressure of supply water and flow (i.e. the flow velocity of fluid and direction) on some key nodes of pipe network, passes through corresponding pipe network
Monitoring model, it is possible to judge the overall water supply health status of pipe network.For pressure, currently passed by the pressure of high-protection level
Sensor, coordinates the telecommunications such as GPRS, is easier to realize.But only one index of pressure can only judge whether some region supplies
Water is normal, it is difficult to judge which segment pipe pipe network appears on extremely.So, if monitoring pressure, two fingers of flow simultaneously
Mark, it is possible to so that pipe network monitoring model capability is greatly promoted.Monitoring point is reached after certain amount, when there is pipe network exception,
The pipeline section for the problem of being likely to occur can be automatically analyzed, efficient means are provided for day-to-day operation supervision.
For water factory, it is a difficult point to carry out effective real-time monitoring to the pipe network that large area is distributed.Subject matter bag
Include：Distance is remote, and power supply is difficult, and wild environment is severe etc..Meanwhile, not only cost is high for current flow meter, and degree of protection is difficult to
The need for reaching pipe network monitoring field extreme environment, and existing flowmeter does not support the detection of water (flow) direction.One confession
Hydraulic Projects (water factory), if to carry out pipe network monitoring, just must be provided with tens points, effectively the whole distribution system of water supply could be entered
Row covering, configures foundation protection facility, then cost is just higher if each monitoring point.Also, because flowmeter is needed
Will powered operation always, be also just difficult to meet field and use.
Utility model content
The purpose of this utility model is to provide a kind of support water (flow) direction detection, water supply flow jump reaction is sensitively existed
Linear flow rate meter, the online flowmeter can apply in the distribution system of water supply, and low-power consumption, low cost, easy for installation.
To achieve the above object, the utility model provides a kind of online flowmeter, including：
Housing, including test section, the test section are placed in tested pipeline；
Flow sensing part, with a rotating shaft, the rotating shaft rotates around a fixing axle, and one end of the rotating shaft is provided with stopper,
The other end of the rotating shaft is provided with permanent magnet, and the stopper is located at outside the housing and in tested pipeline, positioned at the gear
The rotating shaft between head and the fixing axle is connected in the port of the test section by two symmetrically arranged flexible members
Wall；
Hemispherical Shell, in the test section and is open towards the port of the test section, the open circles of the hemispherical Shell
The diameter in face and the center overlapping of axles of the fixing axle, inner side of the permanent magnet along the hemispherical Shell are rotated；
Hall sensor, on the hemispherical Shell, the change in location for detecting the permanent magnet；
Circuit is detected, is connected in the housing in the outside of the hemispherical Shell, and with the Hall sensor, for root
The angle of permanent magnet rotation described in the signal of change exported according to the Hall sensor, to obtain flow velocity and the flowing side of fluid
To.
Optionally, the stopper is circular piece, or spheroid, the flow.
Optionally, the main body of the housing is in cylinder type, and outer surface is provided with screw thread, and the screw thread is provided with tight loop.
Optionally, the quantity of the Hall sensor is two, and two Hall sensors are respectively arranged on the opening
The two ends of the diameter of disc.
Optionally, the quantity of the Hall sensor is three, wherein, two Hall sensors are respectively arranged on described
Be open disc diameter two ends, another is located at the top of the hemispherical Shell, and three Hall sensors constitute it is flat
The plane that face rotates with the flow sensing part is overlapped.
Optionally, epoxy resin is filled with the housing in the region on the outside of the hemispherical Shell.
Optionally, the flexible member include spring and set screw, the set screw located at the spring with it is described
The junction of port inner wall, the tensile elongation for adjusting the spring.
Optionally, the installation site of the online flowmeter is the flowing side of rotating shaft fluid in tested pipeline
To, and flexible member described in two centerline parallel in the flow direction of fluid in tested pipeline.
Optionally, the tail end of the housing is provided with markings, and the center line of flexible member described in the markings and two is put down
OK.
Optionally, surveyed in the flow sensing part, flexible member, fixing axle and the hemispherical Shell and scribble anticorrosion, prevent
Corrosion material.
The specific embodiment provided according to the utility model, the utility model discloses following technique effect：This practicality is new
When the online flowmeter that type is provided is installed in tested pipeline, its stopper is arranged on the inside of tested pipeline, and stopper is by pipeline
Fluid forces, can be towards water (flow) direction rotation, and the permanent magnet of the rotating shaft other end is with stopper rotation identical angle, when the stream of fluid
When fast increase suddenly or reduction, the impulsive force that stopper is received also can increase or reduce therewith, and then occur the position of permanent magnet
Change, Hall sensor can detect the positional information of permanent magnet, and voltage signal output gives detection circuit, by detection circuit
The angle of permanent magnet rotation is calculated according to parameter preset, so as to judge fluid flow direction and flow velocity size.This online stream
Gauge possesses the detection of support water (flow) direction, to the sensitive function of water supply flow jump reaction.Simultaneously flowmeter in this online only
Need to be that Hall sensor and detection circuit provide micro power supply, realize low-power consumption.In addition, this online flowmeter structure letter
Single, each element cost is relatively low, therefore so that the cost of whole online flowmeter is relatively low.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can also basis
These accompanying drawings obtain other accompanying drawings.
The stereogram for the online flowmeter that Fig. 1 provides for the utility model；
The internal structure schematic diagram for the online flowmeter that Fig. 2 provides for the utility model.
Wherein, 1- housings, 11- test sections, 12- screw threads, 13- tight loops, 14-- fixing axles, 2- tested pipelines, 3- flows
Induction pieces, 31- rotating shafts, 32- stoppers, 33- permanent magnets, 34- flexible members, 4- hemispherical Shells, 5- Hall sensors, 6- detection electricity
Road.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The purpose of this utility model is to provide a kind of support water (flow) direction detection, water supply flow jump reaction is sensitively existed
Linear flow rate meter, the online flowmeter can apply in the distribution system of water supply, and low-power consumption, low cost, easy for installation.
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
The stereogram for the online flowmeter that Fig. 1 provides for the utility model, Fig. 2 for the utility model provide in linear flow rate
The internal structure schematic diagram of meter, as shown in Figure 1-2, the online flowmeter that the utility model is provided, including：
Housing 1, including test section 11, test section 11 are placed in tested pipeline 2.In the present embodiment, as shown in figure 1, shell
The main body of body 1 is in cylinder type, and outer surface is provided with screw thread 12, and screw thread 12 is provided with tight loop 13.Using this online flowmeter
During detection flows, it is connected by screw thread 12 with tested pipeline 2, it is convenient to install and reusable, save the set-up time.Also,
The tight loop 13 uses waterproof tight loop, screw thread 12 to be locked, sealed by the tight loop 13 after connecting, and prevents outside fluid
Leakage.
Flow sensing part 3, with a rotating shaft 31, rotating shaft 31 rotates around a fixing axle 14, and one end of rotating shaft 31 is provided with stopper
32, the other end of rotating shaft 31 is provided with permanent magnet 33, and it is outer and in tested pipeline 2 that stopper 32 is located at housing 1, positioned at stopper 32 with
Rotating shaft 31 between fixing axle 14 is connected to the port inner wall of test section 11 by two symmetrically arranged flexible members 34.
In the present embodiment, stopper 32 can be circular piece or spheroid, the material of stopper 32 can be plastics or
Stainless steel, is that influence of the stopper 32 to fluid is reduced during in order to ensure that online flowmeter is used using circular configuration, with as far as possible
Raising flow detection precision.
Hemispherical Shell 4, in the test section 11 and is open towards the port of test section 11, the opening disc of hemispherical Shell 4 it is straight
Footpath and the center overlapping of axles of fixing axle 14, inner side of the permanent magnet 33 along hemispherical Shell 4 are rotated；The central shaft and hemispherical Shell of fixing axle 14
The diameter of 4 opening disc is overlapped, and fixing axle 14 is less than the radius of a ball of hemispherical Shell 4 to the length between permanent magnet 33 so that
Rotating shaft 31 around fixing axle 14 rotate when will not collide hemispherical Shell 4, be also not in flow velocity increase suddenly permanent magnet 33 deflect it is excessive
Collide the situation of hemispherical Shell 4.
Hall sensor 5, on hemispherical Shell 4, the change in location for detecting permanent magnet 33.In the present embodiment, half
Three Hall sensors 5 are provided with spherical shell 4, wherein, two Hall sensors 5 are respectively arranged on the two of the diameter of opening disc
End, another is located at the top of hemispherical Shell 4, and the plane and the plane of the rotation of flow sensing part 3 that three Hall sensors 5 are constituted
Overlap, i.e. three Hall sensors are respectively arranged at 90 °, 0 ° and -90 ° of position, then these three Hall sensors 5 can
The mobile change of permanent magnet 33 is perceived, when permanent magnet 33 is moved, three linear hall sensors 5 can export different voltages
Signal, by handling the voltage signal, you can obtain the angle that permanent magnet 33 rotates, and then the stream of fluid can be measured
Dynamic direction and flow velocity.
Circuit 6 is detected, is connected in the housing 1 in the outside of hemispherical Shell 4, and with Hall sensor 5, for according to suddenly
The angle that the signal of change permanent magnet 33 that your sensor 5 is exported rotates, to obtain flow velocity and the flow direction of fluid.
In this online flowmeter in use, the installation site of online flowmeter flows for rotating shaft 31 in tested pipeline 2
The flow direction of body, and two elastic elements 34 centerline parallel in the flow direction of fluid in tested pipeline 2.Work as flow of fluid
When, stopper 32 is located between fluid, by fluid forces, but because fixing axle 14 is perpendicular to fluid flow direction so that stopper 32
It can deflect in the flowing direction, simultaneously because the effect of the elasticity limitation of flexible member 34 so that deflection angle is bigger, stopper 32
The resistance being subject to is bigger, while it is bigger also to represent water velocity.Permanent magnet 33 is located at the two ends of rotating shaft 31 with stopper 32, because
This, permanent magnet 33 can directly reflect the anglec of rotation of stopper.Three linear hall sensors 5 in the present embodiment are perceived forever
3 different magnitudes of voltage can be exported after the change in location of magnet 33 to detection circuit 6, detection circuit 6 is analyzed by 3 magnitudes of voltage
Judge the position of permanent magnet 33, and calculate the angle of the rotation of permanent magnet 33, by the positive and negative acquisition flow direction of angle value, lead to
Cross the size of the size reacting fluid change in flow of the anglec of rotation.
Unlike the embodiments above as another optional embodiment, the quantity of Hall sensor 5 is two
Individual, two Hall sensors 5 are respectively arranged on the two ends of the diameter of opening disc, for obtaining after two change in location of permanent magnet 33
Magnitude of voltage, can also equally calculate the flow direction of fluid and the size of change in flow.
In the above-described embodiment, a kind of optional embodiment is that the flexible member 34 includes spring and regulation spiral shell
Silk, set screw is located at the junction of spring and port inner wall, the tensile elongation for adjusting spring.Adjusted by set screw
Spring elongation length adjusts tension force, can make it that, when not having current, rotating shaft 31 is in center, and can also be simultaneously
Two tension force of spring above and below adjustment so that stopper 32 rotates different angles under identical fluid impingement force, are realized online
The range of flowmeter and sensitivity are adjustable.
In the above-described embodiments, epoxy resin is filled with the housing 1 in the region in the outside of hemispherical Shell 4, is passed through
Infusion epoxy resin carries out encapsulation process so that probe degree of protection reaches IP68, meets field immersion for a long time and buried
Mounting means.
It should be noted that the flow sensing part 3, flexible member 34, survey in fixing axle 14 and hemispherical Shell 4 scribble it is anti-
Burn into antirust corrosion material, housing 1 uses plastics or metal material, by the cylindrical fashion of the mode of screw thread 12, is adapted to tested
Rotation is screwed into installations on pipeline 2, coordinates waterproof tight loop 13 and afterbody to the protection structure of extraction signal wire so that not only install
Convenient, degree of protection can also reach IP68.
In addition, in order to ensure that stopper 32 is swung along water (flow) direction, it is necessary to which the centerline parallel of flexible member 34 is in tested
The flow direction of fluid in pipeline 2, and in installation process, determine the center line of flexible member whether parallel to quilt for convenience
The flow direction of fluid in test tube road 2, the tail end of the housing of this online flowmeter is provided with markings, the markings and two elasticity members
The centerline parallel of part 34.
Due to factors such as the diameter difference of tested pipeline 2, flow velocity differences, online flowmeter should be able to be supported under different condition
Install and detection needs.This online flowmeter uses the cylindrical shell 1 of same diameter, changes the milli of overall diameter selection 12.7 of housing
Rice is to meet the convenience of field erected assisted fasteners.And existed according to different pipe diameters there is provided different housings length
Linear flow rate meter so that stopper 32 is mountable to the center of tested pipeline 2, reaches optimal monitoring effect.Meanwhile, stopper 32
Diameter can change the detection needs of the tested pipeline for meeting different tube diameters of different-diameter between 4 millimeters -8 millimeters.As managed
On the contrary road is thin, then catch 32 also uses minor diameter, then use major diameter.And this online flowmeter other structures part, all make
With the part of unified specification, the requirement of a large amount of low cost manufactures is met.
Stopper 32 and flexible member 34, directly affects the range and precision of online flowmeter.In swiftly flowing fluid
In, stopper 32 uses minor diameter, can reduce the resistance of the correspondence fluid of stopper 32, precise decreasing, but range and improve；It is on the contrary then smart
Degree lifting, range decline.Similarly, during identical fluid velocity, the adjustment tensile strength of flexible member 34 is big, the limitation to stopper 32
Power is also big, the angle that stopper 32 rotates is diminished, precise decreasing but range raising；On the contrary then precision improvement, range declines.
During the manufacturing of this online flowmeter, stopper 32 is selected and spring regulation, realize online stream
Gauge has the adjustable function of range and precision.For actual product, although due to correlated parts uniform specification, element must
So have differences.In manufacturing process, it is also not possible to fine adjustment is carried out to spring, tension force is allowed to and is consistent.So, each
, could normal work after finished product or maintenance, it is necessary to carry out related parameter matching and calibration, and recorded in detection circuit 6
Make.
The positional information of the permanent magnet detected by Hall sensor, is converted into after voltage signal, is transferred to detection electricity
Lu Zhong, it is specific as follows for the acquisition methods of fluid flow：
1) monitor station is connected by RS485 interface circuits with the signal output part of detection circuit, the MCU into detection circuit
Controller inputs calibration command, detection circuit is entered calibration output mode；
2) monitor station control stopper 32 automatically adjusts the anglec of rotation, and control Hall sensor 5 detects the position of permanent magnet 33,
The output voltage values of corresponding 3 Hall sensors 33 in each position are obtained, and are adjusted by filtering, corresponding relation is fitted to
For, and form effective 3 array datas；
3) check-out console is tested by setting different directions and sample water different in flow rate to this online flowmeter, according to setting
Flow velocity and flow direction and detection angle, is formed corresponding relation be flow velocity-angle matched curve, and formation 1 group of fitting number
According to.
4) monitor station by RS485 interface circuits by the matched curve of above-mentioned 3 angle-voltage and 1 flow velocity-angle
Matched curve is transferred in detection circuit, completes the parameter calibration of this online flowmeter.
5) in use, input tested pipeline diameter, you can the parameter inside coordinating, the flow velocity and flow direction of fluid are obtained.
Detection circuit includes microcontroller, AD converter and signal acquisition module, signal acquisition module collection Hall
The output signal of sensor, and by the matching algorithm of calibrating parameters, realize the calculating of fluid flow and flow direction.
Meanwhile, detection circuit externally exports digital information by RS485 interface circuits, is provided by ModbusRTU modes
Water (flow) direction and flow value.Detection circuit support direct current 9-28V power, meet it is a variety of under the conditions of power supply needs.Outside can be with
By way of intermittent power supply is provided, online flowmeter is powered, the power saving requirement detected on demand is met.
Whole online flowmeter structure is simple, and finished product can realize low-down price.One small-scale water factory installing pipe
Net monitoring point reaches more than 20, and correlative charges is very low, the need for fully meeting domestic rural water supply system at present.Certainly,
Urban water supply engineering monitoring needs can also be met.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to principle of the present utility model and embodiment, above example
Explanation be only intended to help and understand method of the present utility model and its core concept；Simultaneously for the general technology of this area
Personnel, according to thought of the present utility model, will change in specific embodiments and applications.In summary,
This specification content should not be construed as to limitation of the present utility model.
Claims (10)
1. a kind of online flowmeter, it is characterised in that including：
Housing, including test section, the test section are placed in tested pipeline；
Flow sensing part, with a rotating shaft, the rotating shaft rotates around a fixing axle, and one end of the rotating shaft is provided with stopper, described
The other end of rotating shaft is provided with permanent magnet, and it is outer and in tested pipeline that the stopper is located at the housing, positioned at the stopper with
The rotating shaft between the fixing axle is connected to the port inner wall of the test section by two symmetrically arranged flexible members；
Hemispherical Shell, in the test section and is open towards the port of the test section, the opening disc of the hemispherical Shell
Diameter and the center overlapping of axles of the fixing axle, inner side of the permanent magnet along the hemispherical Shell are rotated；
Hall sensor, on the hemispherical Shell, the change in location for detecting the permanent magnet；
Circuit is detected, is connected in the housing in the outside of the hemispherical Shell, and with the Hall sensor, for according to institute
The angle of permanent magnet rotation described in the signal of change of Hall sensor output is stated, to obtain flow velocity and the flow direction of fluid.
2. online flowmeter according to claim 1, it is characterised in that the stopper is circular piece, or spheroid.
3. online flowmeter according to claim 1, it is characterised in that the main body of the housing is in cylinder type, and appearance
Face is provided with screw thread, and the screw thread is provided with tight loop.
4. online flowmeter according to claim 1, it is characterised in that the quantity of the Hall sensor is two, two
The individual Hall sensor is respectively arranged on the two ends of the diameter of the opening disc.
5. online flowmeter according to claim 1, it is characterised in that the quantity of the Hall sensor is three, its
In, two Hall sensors are respectively arranged on the two ends of the diameter of the opening disc, and another is located at the hemispherical Shell
Top, and the plane that three Hall sensors are constituted overlaps with the plane that the flow sensing part rotates.
6. online flowmeter according to claim 1, it is characterised in that be located in the housing on the outside of the hemispherical Shell
Epoxy resin is filled with region.
7. online flowmeter according to claim 1, it is characterised in that the flexible member includes spring and regulation spiral shell
Silk, the set screw is located at the junction of the spring and the port inner wall, the tensile elongation for adjusting the spring.
8. online flowmeter according to claim 1, it is characterised in that the installation site of the online flowmeter is described
The flow direction of rotating shaft fluid in tested pipeline, and flexible member described in two centerline parallel in tested pipeline flow
The flow direction of body.
9. online flowmeter according to claim 8, it is characterised in that the tail end of the housing is provided with markings, described
The centerline parallel of flexible member described in markings and two.
10. online flowmeter according to claim 1, it is characterised in that the flow sensing part, flexible member, fixation
Surveyed in axle and the hemispherical Shell and scribble anticorrosion, antirust corrosion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296734.XU CN206362419U (en) | 2016-11-30 | 2016-11-30 | A kind of online flowmeter for monitoring water (flow) direction and speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296734.XU CN206362419U (en) | 2016-11-30 | 2016-11-30 | A kind of online flowmeter for monitoring water (flow) direction and speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206362419U true CN206362419U (en) | 2017-07-28 |
Family
ID=59372793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621296734.XU Expired - Fee Related CN206362419U (en) | 2016-11-30 | 2016-11-30 | A kind of online flowmeter for monitoring water (flow) direction and speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206362419U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556446A (en) * | 2016-11-30 | 2017-04-05 | 中国水利水电科学研究院 | A kind of effusion meter of pipe network automatic monitoring |
| CN108196597A (en) * | 2017-12-26 | 2018-06-22 | 深圳市宇恒互动科技开发有限公司 | Intelligent liquid flowing management method, system and detection device |
| CN110715693A (en) * | 2019-09-27 | 2020-01-21 | 杭州电子科技大学 | Hall effect based flow detection sensor and manufacturing and detecting methods thereof |
| CN113757568A (en) * | 2021-10-09 | 2021-12-07 | 深圳市先波科技有限公司 | Direct insertion type pipeline fluid detection device and detection method thereof |
| CN116353804A (en) * | 2023-04-28 | 2023-06-30 | 中国船舶科学研究中心 | Electric semi-submerged propeller propelling device and driving method thereof |
-
2016
- 2016-11-30 CN CN201621296734.XU patent/CN206362419U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556446A (en) * | 2016-11-30 | 2017-04-05 | 中国水利水电科学研究院 | A kind of effusion meter of pipe network automatic monitoring |
| CN106556446B (en) * | 2016-11-30 | 2023-11-03 | 中国水利水电科学研究院 | Flowmeter for automatically monitoring pipe network |
| CN108196597A (en) * | 2017-12-26 | 2018-06-22 | 深圳市宇恒互动科技开发有限公司 | Intelligent liquid flowing management method, system and detection device |
| CN108196597B (en) * | 2017-12-26 | 2020-12-29 | 深圳市宇恒互动科技开发有限公司 | Intelligent liquid flow management method, system and detection device |
| CN110715693A (en) * | 2019-09-27 | 2020-01-21 | 杭州电子科技大学 | Hall effect based flow detection sensor and manufacturing and detecting methods thereof |
| CN113757568A (en) * | 2021-10-09 | 2021-12-07 | 深圳市先波科技有限公司 | Direct insertion type pipeline fluid detection device and detection method thereof |
| CN116353804A (en) * | 2023-04-28 | 2023-06-30 | 中国船舶科学研究中心 | Electric semi-submerged propeller propelling device and driving method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170728 Termination date: 20171130 |