CN113324612B - System for tracking and measuring water level in pipeline - Google Patents
System for tracking and measuring water level in pipeline Download PDFInfo
- Publication number
- CN113324612B CN113324612B CN202110592334.2A CN202110592334A CN113324612B CN 113324612 B CN113324612 B CN 113324612B CN 202110592334 A CN202110592334 A CN 202110592334A CN 113324612 B CN113324612 B CN 113324612B
- Authority
- CN
- China
- Prior art keywords
- liquid level
- level detector
- driving
- wheel
- rope
- Prior art date
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/0023—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm with a probe suspended by a wire or thread
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a water level tracking and measuring system in a pipeline, which belongs to the technical field of hydrological measurement, and uses a liquid level detector to replace the existing liquid level detecting device in the pipeline, so that the winding and knotting between a detecting device and a rope are avoided, the interference of obstacles in the pipeline can be avoided, the influence of the environment is small, the measuring precision is high, and the service life is long; comprising the following steps: the tail end of the transmission rope is connected with the liquid level detector; the front end of the driving rope is fixedly connected with the driving wheel, the driving wheel is also connected with a power source, and the driving wheel can drive the liquid level detector to operate through the driving rope according to a set program; the driven wheel is used for measuring the movement distance of the driving rope, is synchronously connected with the angular displacement sensor through the driving mechanism, and is wound by the driving rope; the control system is connected with the liquid level detector, the power source and the angular displacement sensor, and can acquire the position information of the liquid level detector and the measurement data of the angular displacement sensor and output a power source control signal to control the liquid level detector to automatically monitor according to a set automatic program.
Description
Technical Field
The invention belongs to the technical field of hydrological measurement, and particularly relates to a water level tracking and measuring system in a pipeline.
Background
The water level monitoring equipment in the pipeline is various, but the difference is mainly concentrated in the aspects of sensors and acquisition modes, the data transmission, storage and other aspects are basically different in size, the water level acquisition device which is widely used in China at present is divided into a pressure type sensor and a float type sensor, the pressure type sensor is arranged below the water surface, and the float type sensor floats on the water surface.
The inventor considers that the working principle of the float type sensor is that the float changes along with the water level in the vertical direction, then the rope drives the log wheel of the water level meter to rotate, and finally the position change of the log wheel is converted into a measuring instrument of the water level, and the defect is that the steel rope of the float and the heavy hammer is easy to wind and tie, the stability is poor and the measuring precision is low; the floater is easily interfered by external force factors such as obstacles and the like in the pipe, so that a perception error is caused. In practical application, the water level monitoring device adopting the float principle often has a blocking phenomenon.
The inventor considers that the working principle of the pressure type liquid level sensor is that the pressure sensing unit arranged under water converts water pressure into an electric signal, and then the water level is deduced through the conversion relation between the electric signal and water depth, and the pressure type liquid level sensor has the defects of large influence by environmental factors such as sediment, temperature and the like, phenomena such as temperature, time, nonlinear drift and the like, and the pressure type liquid level sensor needs to be checked and calibrated regularly when in use, and has poor long-term observation precision; the sensor needs to adopt a conductive cable to transmit signals, is easy to be subjected to electromagnetic interference and lightning stroke, and has poor working reliability; the sensor is arranged at the bottom of the water, so that the equipment is difficult to maintain; from practical application, the sensor is placed in water for a long time, and the service life is short.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a water level tracking and measuring system in a pipeline, which uses a liquid level detector capable of actively changing the position and can automatically find the water surface; an independent metering device is adopted, so that the measurement accuracy is high; the liquid level detector only touches the water surface in the detection moment, and the other time is all left, and the main device is arranged at the top end of the pipeline and is not influenced by factors such as environment, and the service life is long.
In order to achieve the above object, the present invention is realized by the following technical scheme:
the technical scheme of the invention provides a system for tracking and measuring the water level in a pipeline, which is characterized by comprising the following components:
the tail end of the transmission rope is connected with the liquid level detector;
the front end of the driving rope is fixedly connected with the driving wheel, the driving wheel is also connected with a power source, and the driving wheel can drive the liquid level detector to operate through the driving rope according to a set program;
the driven wheel is used for measuring the movement distance of the driving rope, and is synchronously connected with the angular displacement sensor through the driving mechanism, and the driving rope winds the driven wheel, so that a whole set of independent measuring device is formed;
the control system is connected with the liquid level detector, the power source and the angular displacement sensor, and can acquire the position information of the liquid level detector and the measurement data of the angular displacement sensor and output a power source control signal to control the liquid level detector to automatically monitor according to a set automatic program.
The technical scheme of the invention has the following beneficial effects:
1) In the invention, the liquid level detector is used for replacing the existing liquid level detection device in the pipeline, the liquid level detector only touches the water surface when the detection of the water surface is carried out, the rest time periods are kept at a set distance from the water surface, and other devices are arranged at the top end of the pipe, so that the equipment is not interfered by the external environment factors such as ambient temperature and humidity, wind and rain snow and the like, and has good durability and long service life.
2) In the invention, the liquid level detector has the performance of tracking and monitoring, and the main forms are as follows: after the liquid level detector touches the water surface, uploading a water surface signal, recording the water surface elevation at the moment by the system, then, rising the liquid level detector to a set height after leaving the water surface, and then, automatically executing the same detection by the detector according to a detection period set by a user. If the water surface rises to the set height in the set period, the water surface can touch the liquid level detector, and the detector uploads the water surface signal at the moment and rises to the set height again. And the water level drop can be monitored in time by adjusting the monitoring frequency of the control system. The tracking and monitoring performance of the liquid level detector can timely find the change condition of the water level, and is more beneficial to timely monitoring the water level.
3) According to the liquid level detector, the weight of the liquid level detector can meet the requirement that the driving rope always keeps a straight state in operation, winding and knotting between the detection device and the rope are avoided, and enough friction force between the driving rope and the metering wheel is met, so that the driving rope is ensured to drive the metering wheel not to slide when moving, and the monitoring effect is ensured to reach high precision.
4) In the invention, the driving wheel is also a reel, the driving rope in the system is a thin steel wire rope, and the winding is layered on the reel, so that the length of the driving rope can be determined according to the requirement of a monitoring scene, and the invention is not influenced by the monitoring range.
5) In the invention, a mechanical transmission device consisting of a driving wheel, a driven wheel, an auxiliary wheel set and a transmission rope is adopted. The motion record of the driven wheel is synchronously transmitted to the angular displacement sensor, the angular displacement data measured by the angular displacement sensor can accurately reflect the moving distance of the driving cable, and the whole equipment is linked, so that the operation is stable and reliable; the wheel group system formed by the driving wheel and the driven wheel can avoid winding errors caused by independently using one winding wheel, and the angular displacement measurement can be carried out by independently adopting the driven wheel, so that measurement errors caused by winding can be avoided to a great extent.
6) The measuring part of the measuring system provided by the invention is composed of a mechanical device convenient to maintain, and is simple and convenient to install and maintain; the server can control the liquid level detector to reset through a remote instruction, and after the reset action is finished, the server reminds a user to perform the next operation, so that the water level monitoring device is suitable for being widely applied to the field of water level monitoring.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic illustration of a mechanical transmission according to one or more embodiments of the invention;
FIG. 2 is a schematic overall system diagram in accordance with one or more embodiments of the invention;
FIG. 3 is a schematic perspective view of a mechanical transmission according to one or more embodiments of the present invention;
fig. 4 is a schematic view of a power source configuration of a drive wheel according to one or more embodiments of the present invention.
FIG. 5 is a schematic diagram of a mechanical transmission according to one or more embodiments of the invention.
In the figure: 1. the device comprises a driving wheel, 2 auxiliary wheel connectors, 34, guide wheels, 35, a fourth auxiliary wheel, 4, a driven wheel, 5, an angular displacement sensor, 6, a driving cable, 7, a liquid level detector, 8, an antenna, 9, a pipeline, 11, a water level, 30, a mechanical device, 40, a cloud platform, 50, a mobile phone, 60, water, 101, a motor, 102 and a measurement and control module.
The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that any combination is possible between the following embodiments.
Example 1
In an exemplary embodiment of the present invention, the present embodiment discloses a system for tracking and measuring water level in a pipeline, which uses a liquid level detector 7 capable of conducting an electrical signal of the water surface as a detection device for detecting the water surface, and controls the liquid level detector 7 through a mechanical transmission device 30, so as to automatically operate the water level detection according to a set program. The system disclosed in the embodiment comprises a mechanical transmission device 30, a liquid level detector 7 and a server, wherein the liquid level detector 7 is connected with the mechanical transmission device 30, and the mechanical transmission device 30 drives the liquid level detector 7 to enable the liquid level detector 7 to execute a setting program and automatically monitor the water level.
Specifically, the width of the rolling surface of the driving wheel and the diameter of the winding part are determined according to the length range of the driving cable required by the monitoring scene.
More specifically, the driving wheel is provided with a plurality of circles of grooves for winding, and the driving wheel can rotate for a plurality of layers; the driven wheel is provided with only one circle of grooves for winding; namely: the driving wheel is wound with a plurality of layers of driving ropes and the driving ropes wound on the driven wheel, the driving ropes are guided to the lower part of the driven wheel through the auxiliary wheel, so that the surface of the circumference of the driven wheel, which is more than one half of the circumference of the driven wheel, is always contacted with the driving ropes, and the driving ropes are kept in a tight state under the action of the gravity of the detector, so that the sliding between the driving ropes and the driven wheel is avoided, and the measurement precision is ensured. In this embodiment, the wheel group system formed by the driving wheel and the driven wheel can avoid winding errors caused by using one winding wheel alone, and in this embodiment, the driven wheel always records the running track of the driving cable, so that the driven wheel is adopted alone to perform angular displacement measurement, and measurement errors caused by winding can be avoided to a great extent.
In a further embodiment, the liquid level detector 7 is separately connected with the server in a communication manner, and particularly, a communication connection manner of wired connection or wireless connection can be adopted.
The liquid level detector 7 works on the principle that the voltage and current of the liquid level detector 7 are stable in the air after the liquid level detector 7 is electrified, and once the liquid level detector 7 contacts water, the current can change instantaneously.
It will be appreciated that any type of detector that can trigger a signal when the level detector 7 touches the water surface can be used.
In addition, the mechanical transmission device 30 in this embodiment further includes a single guide wheel 34, and the single guide wheel 34 is located at the end of the path of the driving cable 6 and also below the driven wheel 4, and the driving cable 6 is wound around the single guide wheel 34 to adjust the path of the driving cable 6.
Referring to fig. 1, the auxiliary wheel set includes a first rotating member, a second rotating member and a third rotating member which are arranged in a triangle shape, and the driving cable 6 sequentially bypasses the three rotating members, and after being adjusted by a plurality of driving wheels, the driving cable winds into the driven wheel from the direction shown in fig. 1, so as to ensure that more than half of contact surfaces are provided on the driven wheel.
Referring to fig. 3, the power source connected to the driving wheel 1 includes a driving motor 101 and a measurement and control module 102, where the measurement and control module 102 is used to obtain related data in the operation process of the motor 101 and control the operation of the motor 101, and the measurement and control module is directly in communication with the server.
The driven wheel 4 is connected with the angular displacement sensor through a gear set, the gear set comprises a first gear and a second gear which are meshed with each other, the first gear is coaxially connected with the driven wheel 4, and the second gear is coaxially connected with the angular displacement sensor 5. In the embodiment, the transmission is performed through the gear set, the synchronism is high, the service life is long, and the accurate detection of the water level in the pipeline 9 is realized.
It can be understood that the measurement result of the angular displacement sensor is an angle change, and the displacement of the rope can be calculated by multiplying the measurement result of the angular displacement sensor by the related data of the driven wheel. When the measurement result of the angular displacement sensor is output as a specific angle value, the calculation method is specifically to multiply the measurement result of the angular displacement sensor by the diameter of the driven wheel divided by 360.
In order to facilitate the necessary protection of the above mechanical transmission 30, the mechanical transmission 30 is placed in a box, and the above driving wheel 1, driven wheel 4, auxiliary wheel set and separately provided guide wheels 34 are all rotatably connected to the vertical wall in the box.
The driving wheel 1 and the driven wheel 4 are rotating discs with grooves on the sides.
Further, when the system in this embodiment works, the server always detects the electric signal from the liquid level detector 7, the server automatically detects the state of the liquid level detector 7, if no water is touched, the power source is controlled to reversely drive the driving wheel 1, the driving rope 6 sequentially winds around the three auxiliary wheels, then the driven wheel 4 is driven by the friction force formed between the liquid level detector 7 and the counterweight of the liquid level detector 7 and the steel wire rope, the driven wheel 4 rotates, the liquid level detector 7 is controlled to descend to search the water surface, in the movement process, if the liquid level detector 7 touches water, the signal is immediately triggered, the control system immediately controls the motor 101 to stop, then the displacement sensor data is read, then the measured data is sent to the server through the communication module, then the motor 101 is controlled to positively rotate to stop the movement of the liquid level detector 7 at a position 2cm away from the water surface, and the next period is waited for detection again. If the water surface rises to 2cm in one detection period, the liquid level detector can be triggered, the detector is not limited by the detection period, the signal is immediately uploaded, the system records data, and the liquid level detector automatically lifts the position 2cm above the water surface. The detection period is set by a user according to rules and specifications, and can also be set by the user according to the needs of the user.
It will be appreciated that the above distance of 2cm from the water surface is merely an arrangement in this embodiment, and in other embodiments the distance may be set by the user himself.
It will be appreciated that in a detection cycle, the water level rises less than 2cm, i.e. the detector is not triggered, and the detector is not triggered either by a drop in water level, in which case the detector automatically detects the water level automatically according to the detection cycle. If the scene is detected in time, the detection period can be adjusted to solve the problem. Generally, the water level in a hydrological observation well, particularly a pipeline, changes slowly, and most of water level observation is performed in underground water or a dam body of a reservoir. In practical applications, the observation period is typically 4 hours, 24 hours or one week. The requirement of hydrologic observation can be met by adjusting the detection period.
Specifically, the shape and material of the liquid level detector 7 in the embodiment need to be reasonably selected, firstly, the weight of the liquid level detector 7 needs to meet the minimum friction required by the steel wire rope to drive the driven wheel so as to ensure that the steel wire rope cannot slide when passing through the driven wheel; secondly, except for a measuring part, the liquid level detector 7 is wrapped by adopting an insulating material.
Specifically, the motor 101 in the power source needs to reasonably select the direct current gear motor 101, on the motor 101 selection, the rotating speed is not too fast, when the rotating speed is too fast, when three states of stopping, forward rotation and reverse rotation of the motor 101 are switched, the winding stability of the steel wire rope can be affected by mechanical inertia, and in the embodiment, the test comparison is performed, and finally the 10RPM gear motor 101 is selected.
The system also comprises an equipment acquisition unit, wherein the equipment acquisition unit is arranged in the box body, and comprises an acquisition module, a communication module, a lightning protection module and a power management module which are connected with the control module. The acquisition module is an analog-digital conversion circuit, the control module is an MCU, the communication module is a modulation circuit and an antenna 8, the lightning protection module is a lightning rod arranged outside the shell, and the power management module is a power management circuit. The acquisition unit can carry out remote software updating and upgrading through GPRS communication.
The server in this embodiment includes a cloud platform 40, and the platform functions include remote data receiving, data anomaly alarm, timing report generation, data analysis and comparison, data prediction, and the like, and especially the platform is integrated with the docking of the AI technology and the BIM model, so that different types of structures can be monitored, manual data uploading and monitored data downloading are supported, and an API interface is developed to realize data calling. The platform can be compatible with monitoring devices of different monitoring factors and different hardware manufacturers, and can be used by logging in through a Web terminal and an APP version.
The server is built in a distributed mode, the speed and the capacity of the server can be continuously expanded, and the requirements of various use scenes are met. The server may also use a virtual server.
The angle displacement sensor that selects to use in this embodiment can reach the effect of accurate measurement, and measuring error is less than or equal to 2mm.
The embodiment can be suitable for monitoring in various severe environments. The instrument is of a full-sealed structure, the built-in dehumidifying part is suitable for working in various environments, and the situation that the measuring performance is influenced or the measuring performance cannot be measured due to too high or too low temperature is avoided.
The water level detector 7 in the pipeline 9 actively tracks and intelligently senses the water level change, the water level monitoring threshold value and the numerical value in the pipeline 9 are set according to the requirements of various working conditions and fed back to the cloud in real time, and the overrun abnormality responds to the manager in time; due to the cloud platform 40, reports and data are automatically generated, pre-warning thresholds are set for different buildings, and real-time reports are sent to related units for management.
It should be noted that, in this embodiment, the server, the cloud platform, and some controllers of the motor model are all control systems.
Example 2
In an exemplary embodiment of the present invention, this embodiment discloses a system for tracking and measuring water level in a pipeline, which is different from embodiment 1 in that a transmission mode of chain transmission is used between the driven wheel 4 and the angular displacement sensor 5 in this embodiment.
In yet another embodiment, the angular displacement sensor may also be directly connected to the driven wheel.
Example 3
In an exemplary embodiment of the present invention, this embodiment discloses a system for tracking and measuring water level in a pipeline, which is different from embodiment 1 in that the driving wheel 1, the driven wheel 4, the auxiliary wheel set and the guide wheel 34 all use rollers.
Example 4
In an exemplary embodiment of the present invention, the present embodiment discloses a system for tracking and measuring water level in a pipeline, which is different from embodiment 1 in that the number of auxiliary wheels in the auxiliary wheel set is other natural numbers except 3.
Referring to fig. 5, in the present embodiment, the number of auxiliary wheels in the auxiliary wheel set is 4, and compared with embodiment 1, the auxiliary wheel (fourth auxiliary wheel 35) located at the end of the auxiliary wheel set is significantly offset to the left in the figure, so that the driving cable obtains a better angle for winding into the driven wheel, and the contact area between the driving cable and the driven wheel is increased.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A system for tracking and measuring water level in a pipeline, comprising:
the tail end of the transmission rope is connected with the liquid level detector;
the front end of the driving rope is fixedly connected with the driving wheel, the driving wheel is also connected with a power source, and the driving wheel can drive the liquid level detector to operate through the driving rope according to a set program;
the driven wheel is used for measuring the movement distance of the driving rope, is synchronously connected with the angular displacement sensor through the driving mechanism, and is wound by the driving rope;
the control system is connected with the liquid level detector, the power source and the angular displacement sensor, and can acquire the position information of the liquid level detector and the measurement data of the angular displacement sensor, and output a power source control signal to control the liquid level detector to automatically monitor according to a set automatic program; after the liquid level detector touches the water surface, uploading a water surface signal, recording the water surface elevation at the moment by the system, and then, after the liquid level detector leaves the water surface and rises to the set height, automatically executing the same detection by the detector according to the detection period set by a user, if the water surface rises to the set height in the set period, the water surface touches the liquid level detector, and uploading the water surface signal at the moment by the detector, and rising to the set height again, wherein the water level drop can be monitored in time by adjusting the monitoring frequency of the control system;
the auxiliary wheel set is also included, and the transmission rope sequentially passes through the driving wheel, the auxiliary wheel set and the driven wheel; the driving wheel is provided with a plurality of circles of grooves for winding, and the driving wheel can rotate for a plurality of layers; the driven wheel is provided with only one circle of grooves for winding; the contact surface of the driving rope on the driven wheel is not less than one half of the circumference;
the power source can be switched among three states of stalling, forward rotation and reverse rotation;
the angular displacement sensor is mounted below the driven wheel.
2. The in-line water level tracking measurement system of claim 1, wherein the transmission mechanism is a gear set.
3. The in-line water level tracking measurement system of claim 2, wherein the gear set includes a first gear and a second gear meshed with each other, the first gear being coaxially coupled to the drive wheel, the second gear being coaxially coupled to the angular displacement sensor.
4. The system of claim 1, wherein the drive wheel and the driven wheel are connected to a wall.
5. The in-line water level tracking measurement system of claim 1, wherein the auxiliary wheelset includes a plurality of rotating members, the drive cable being wound around each of the drive members.
6. The in-line water level tracking measurement system of claim 1, wherein the level detector comprises a conductor and an insulator covering an outside of the conductor; the conductor has a tip portion capable of being in direct contact with the outside.
7. The system of claim 1, wherein the driving wheel and the driven wheel are rotating discs with grooves on the sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592334.2A CN113324612B (en) | 2021-05-28 | 2021-05-28 | System for tracking and measuring water level in pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592334.2A CN113324612B (en) | 2021-05-28 | 2021-05-28 | System for tracking and measuring water level in pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113324612A CN113324612A (en) | 2021-08-31 |
| CN113324612B true CN113324612B (en) | 2023-08-25 |
Family
ID=77422205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110592334.2A Active CN113324612B (en) | 2021-05-28 | 2021-05-28 | System for tracking and measuring water level in pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113324612B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115127639A (en) * | 2022-09-01 | 2022-09-30 | 济南和一汇盛科技发展有限责任公司 | Monitoring method of water level monitoring device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159018Y (en) * | 1993-03-12 | 1994-03-16 | 巩天银 | Float capacitance grid type liquid level meter |
| CN2460976Y (en) * | 1999-06-16 | 2001-11-21 | 华中光电技术研究所 | Constant tension servo-type float level meter |
| CN101464177A (en) * | 2009-01-12 | 2009-06-24 | 郑贵林 | Liquid level detection type self-calibration high-precision water gauge |
| CN202974389U (en) * | 2012-10-26 | 2013-06-05 | 浙江大学 | Float-type water level indicator adopting datum water level |
| CN206905848U (en) * | 2017-06-26 | 2018-01-19 | 济南和一汇盛科技发展有限责任公司 | Tracking mode integration water-level remote measuring instrument |
| WO2020096401A1 (en) * | 2018-11-09 | 2020-05-14 | (주)성림엠엔씨 | Water level measuring device having function of preventing winter freezing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203657892U (en) * | 2013-11-28 | 2014-06-18 | 江苏多维科技有限公司 | Non-contact type pulley liquid level sensor |
-
2021
- 2021-05-28 CN CN202110592334.2A patent/CN113324612B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159018Y (en) * | 1993-03-12 | 1994-03-16 | 巩天银 | Float capacitance grid type liquid level meter |
| CN2460976Y (en) * | 1999-06-16 | 2001-11-21 | 华中光电技术研究所 | Constant tension servo-type float level meter |
| CN101464177A (en) * | 2009-01-12 | 2009-06-24 | 郑贵林 | Liquid level detection type self-calibration high-precision water gauge |
| CN202974389U (en) * | 2012-10-26 | 2013-06-05 | 浙江大学 | Float-type water level indicator adopting datum water level |
| CN206905848U (en) * | 2017-06-26 | 2018-01-19 | 济南和一汇盛科技发展有限责任公司 | Tracking mode integration water-level remote measuring instrument |
| WO2020096401A1 (en) * | 2018-11-09 | 2020-05-14 | (주)성림엠엔씨 | Water level measuring device having function of preventing winter freezing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113324612A (en) | 2021-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113324612B (en) | System for tracking and measuring water level in pipeline | |
| CN113720381A (en) | Suspension type overhead transmission line on-line monitoring method | |
| CN113296134B (en) | Reservoir landslide array type underwater deformation monitoring device and monitoring method | |
| CN106767364B (en) | Hydraulic support pose and straightness detection system and working method thereof | |
| CN110375811A (en) | A kind of Wetlands Monitoring device based on Internet of Things | |
| CN105021841B (en) | A kind of reel sprinkling irrigation machine PE pipes movement speed detection device | |
| CN201819686U (en) | Hydrology monitoring device | |
| CN104237710A (en) | Pantograph characteristic testing device based on sensors | |
| CN201673148U (en) | Hydrological automatic monitoring device | |
| CN103344306A (en) | Device and method of WSN float liquid level detection for environmental protection | |
| CN110132584A (en) | A kind of data acquisition device and method of ball screw assembly, life prediction | |
| CN112557695A (en) | Outdoor raise dust on-line monitoring device | |
| CN214040254U (en) | Intelligent material level measuring device suitable for working in severe environment | |
| CN113551648B (en) | Real-time automatic measurement device and measurement method for inclination direction of dangerous rock body | |
| CN103017879A (en) | Metering method and device for fuel coal of boiler | |
| CN205192524U (en) | Rail temperature monitoring devices | |
| CN201540142U (en) | Automatic measuring device for unidirectional movement of ascending/descending of water level | |
| CN110864989B (en) | Test platform and method for detecting wear resistance of parts in pipeline | |
| CN2864621Y (en) | Tracking weight material level meter | |
| CN105698869A (en) | Magnetic-levitation-principle-based wind direction and wind speed measuring device | |
| CN216283123U (en) | Underground pipeline settlement displacement monitoring device | |
| CN110823321A (en) | Liquid level measuring device and liquid level measuring method thereof | |
| CN220104082U (en) | Automatic movable horizontal inclinometer probe patrols and examines | |
| CN220120191U (en) | Water level monitor | |
| CN219512437U (en) | Meteorological monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |