CN113324612A - Water level tracking and measuring system in pipeline - Google Patents
Water level tracking and measuring system in pipeline Download PDFInfo
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- CN113324612A CN113324612A CN202110592334.2A CN202110592334A CN113324612A CN 113324612 A CN113324612 A CN 113324612A CN 202110592334 A CN202110592334 A CN 202110592334A CN 113324612 A CN113324612 A CN 113324612A
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- level detector
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- 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
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- Fluid Mechanics (AREA)
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention discloses a system for tracking and measuring water level in a pipeline, which belongs to the technical field of hydrological measurement, and is characterized in that a liquid level detector is used for replacing the conventional liquid level detector device in the pipeline, so that the winding and knotting between a detection device and a rope are avoided, the interference of obstacles in the pipeline can be avoided, the environmental influence is small, the measurement precision is high, and the service life is long; the method comprises the following steps: the tail end of the transmission cable is connected with the liquid level detector; the front end of the transmission cable is fixedly connected with the driving wheel which is also connected with a power source, and the driving wheel can drive the liquid level detector to operate according to a set program through the transmission cable; the driven wheel is used for measuring the movement distance of the transmission cable, is synchronously connected with the angular displacement sensor through the transmission mechanism, and the transmission cable is wound around the driven wheel; the control system, liquid level detector, power supply and angle displacement sensor connect control system, and control system can acquire liquid level detector positional information and angle displacement sensor's measured data, output power supply control signal in order to control liquid level detector according to the automatic procedure monitoring of setting for oneself.
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 mainly focuses on the aspects of a sensor and a collection mode, the aspects of data transmission, data storage and the like are basically the same and different, the water level collection device widely used in China at present is divided into a pressure type device and a float type device, the pressure type sensor is installed below the water surface, and the float type device floats on the water surface.
The inventor thinks that the working principle of the float type sensor is that the float changes with the water level in the vertical direction, then the rope drags the odometer wheel of the water level meter to rotate, and finally the position change of the odometer wheel is converted into the measuring instrument of the water level, and the measuring instrument has the defects that the steel ropes of the float and the heavy hammer are easy to wind and knot, the stability is poor, and the measuring precision is low; the floater is easy to be interfered by external force factors such as obstacles in the pipe, thereby causing sensing errors. In practical application, the water level monitoring device adopting the float principle is often blocked.
The inventor thinks that the working principle of the pressure type liquid level sensor is that the water pressure is converted into an electric signal by a pressure sensing unit arranged under water, and then the water level is calculated by the conversion relation between the electric signal and the water depth, and the pressure type liquid level sensor has the defects that the pressure type liquid level sensor is greatly influenced by environmental factors such as silt and temperature, has the phenomena of temperature, time, nonlinear drift and the like, needs to be checked and rated regularly during 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 water bottom, so that the equipment maintenance is difficult; 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 in the prior art, the invention aims to provide a system for tracking and measuring the water level in a pipeline, which uses a liquid level detector capable of actively changing the position, and the liquid level detector can automatically search the water level; an independent metering device is adopted, so that the measurement precision is high; the liquid level detector only touches the water surface at the detection moment, and leaves the water surface at other times.
In order to achieve the purpose, the 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 cable is connected with the liquid level detector;
the front end of the transmission cable is fixedly connected with the driving wheel which is also connected with a power source, and the driving wheel can drive the liquid level detector to operate according to a set program through the transmission cable;
the driven wheel is used for measuring the movement distance of the transmission cable, the driven wheel is synchronously connected with the angular displacement sensor through the transmission mechanism, and the transmission cable is wound on the driven wheel, so that a whole set of independent measuring device is formed;
the control system, the liquid level detector, the power source and the angular displacement sensor are connected with the control system, the control system can acquire position information of the liquid level detector and measurement data of the angular displacement sensor, and a power source control signal is output 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 detecting the water surface, the rest time intervals are kept at set distances from the water surface, and other devices are all arranged at the top end of the pipeline, so that the equipment is not interfered by external environmental factors such as ambient temperature and humidity, wind, 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 form is as follows: after the liquid level detector touches the water surface, a water surface signal is uploaded, the system records the water surface elevation at the moment, then the liquid level detector leaves the water surface and rises to a set height, and then the detector automatically executes the same detection according to a detection period set by a user. If the water level rises to reach the set height in the set period, the water level touches the liquid level detector, and the detector uploads the water level signal at the moment and rises to the set height again. Similarly, the water level drop can be timely monitored by adjusting the monitoring frequency of the control system. The tracking and monitoring performance of the liquid level detector can discover the change condition of the water level in time, thereby being more beneficial to the timely monitoring of the water level.
3) According to the invention, the weight of the liquid level detector can meet the requirement that the transmission cable is always in a stretched state in the operation process, the detection device and the rope are prevented from being wound and knotted, sufficient friction force is provided between the transmission cable and the metering wheel, the metering wheel is ensured not to slide when the transmission cable moves, and the monitoring effect is ensured to reach high precision.
4) In the invention, the driving wheel is also a winding wheel, the transmission cable in the system is a thin steel wire rope, and the winding wheel is wound in a layered manner, so that the length of the transmission cable can be determined according to the requirement of a monitoring scene, and the system 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 cable 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 transmission cable, and the equipment is integrally linked and operates stably and reliably; the wheel set system formed by the driving wheel and the driven wheel can avoid winding errors caused by the independent use of a winding wheel, the independent adoption of the driven wheel for angular displacement measurement can avoid the measurement errors caused by winding to a great extent.
6) The measuring part of the measuring system provided by the invention is composed of a mechanical device convenient for maintenance, and is simple and convenient to install and maintain; the server can control the liquid level detector to reset through a remote instruction, and reminds a user to perform next operation after the resetting action is finished, so that the method is suitable for wide application water level monitoring field.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic illustration of a mechanical transmission according to one or more embodiments of the present disclosure;
FIG. 2 is a schematic diagram of an overall system according to 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 disclosure;
FIG. 4 is a schematic illustration of a power source configuration for a capstan in accordance with one or more embodiments of the present invention.
FIG. 5 is a schematic illustration of a mechanical transmission according to one or more embodiments of the present invention.
In the figure: 1. the device comprises a driving wheel, 2, an auxiliary wheel connecting piece, 34, a guide wheel, 35, a fourth auxiliary wheel, 4, a driven wheel, 5, an angular displacement sensor, 6, a transmission 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 spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It should be noted that any combination between the following embodiments is possible.
Example 1
In a typical embodiment of the present invention, the present embodiment discloses a system for tracking and measuring a water level in a pipeline, which uses a liquid level detector 7 capable of conducting an electrical signal on a 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 transmission 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 to wind a plurality of layers; the driven wheel is only provided with a circle of grooves for winding; namely: the driving wheel is wound with a plurality of layers of transmission cables and the transmission cables wound on the driven wheel, the transmission cables are guided to the lower part of the driven wheel through the auxiliary wheel, so that the surface with the circumference larger than one half of the circumference of the driven wheel is always contacted with the transmission cables, and the transmission cables are kept in a tight state under the action of the gravity of the detector, thereby avoiding the sliding between the transmission cables and the driven wheel, and ensuring the measurement accuracy. In this embodiment, use the action wheel and follow the wheelset system that the driving wheel constitutes, can avoid the wire winding error that a reel of exclusive use caused, in this embodiment, follow the moving trajectory of driving cable of driving wheel record all the time, consequently adopt alone to carry out the angular displacement measurement from the driving wheel, can avoid to a great extent because the measurement error that the wire winding leads to.
In another embodiment, the liquid level detector 7 is separately connected to the server in a communication manner, specifically, a wired connection or a wireless connection may be adopted.
The working principle of the liquid level detector 7 is that after the liquid level detector 7 is electrified, the voltage and the current of the liquid level detector 7 in the air are stable, and once the liquid level detector 7 contacts water, the current can change instantly.
It will be appreciated that any type of detector that touches the water surface can trigger a signal can be used for the level detector 7.
In addition, the mechanical transmission device 30 in this embodiment further includes a single guide pulley 34, the single guide pulley 34 being located at the end of the path of the transmission cable 6 and also below the driven pulley 4, and the transmission cable 6 being wound around the single guide pulley 34 to adjust the path of the transmission cable 6.
Referring to fig. 1, the auxiliary wheel set includes a first rotating member, a second rotating member and a third rotating member arranged in a triangle, the transmission cable 6 sequentially passes around the three rotating members, and after being adjusted by the plurality of transmission wheels, the transmission cable passes around the driven wheel from the direction shown in fig. 1, so as to ensure that more than one half of the contact surface is 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, the measurement and control module 102 is used for acquiring related data of the motor 101 during operation and controlling the operation of the motor 101, and the measurement and control module is directly communicated 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, transmission is performed through the gear set, the synchronism is high, the service life is long, and accurate detection of the water level in the pipeline 9 is realized.
It will be appreciated that the angular displacement sensor measures angular changes and the amount of rope displacement can be calculated by multiplying the angular displacement sensor measurements by the data relating to the driven pulley. 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 provide necessary protection for the mechanical transmission device 30, the mechanical transmission device 30 is disposed in a box, and the driving wheel 1, the driven wheel 4, the auxiliary wheel set and the separately disposed guide wheel 34 are rotatably connected to a vertical wall in the box.
The driving wheel 1 and the driven wheel 4 are rotating discs with grooves in the side faces.
Furthermore, when the system in the 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 the system does not touch water, the power source is controlled to reversely rotate to drive the driving wheel 1, the transmission cable 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 balance weight of the liquid level detector 7 and the steel wire rope, the driven wheel 4 rotates to control the liquid level detector 7 to descend to search the water surface, in the movement process, if the liquid level detector 7 touches water, a signal is immediately triggered, the control system immediately controls the motor 101 to stop, then the data of the displacement sensor is read, the measured data is sent to the server through the communication module, then the motor 101 is controlled to rotate forwards to the position of the liquid level detector 7 2cm away from the water surface to stop moving, waiting for the next cycle to detect again. If the water surface rises to 2cm in a detection period, the liquid level detector is triggered, the detector is not limited by the detection period at the moment, signals are uploaded immediately, the system records data, and the liquid level detector automatically lifts the position 2cm above the water surface. The detection period here is set by the user according to the regulations and specifications, and can also be set by the user according to the needs of the user.
It is understood that the above distance of 2cm from the water surface is only a setting in the present embodiment, and in other embodiments, the distance may be set by the user himself.
It can be understood that in a detection period, if the water level rises less than 2cm, the detector is not triggered, and the water level falls, the detector is not triggered, and in such a scene, the detector automatically detects the water level according to the detection period. If the scene needs to be detected in time, the problem can be solved by adjusting the detection period. Generally, the water level in the hydrological observation well, particularly in a pipeline, changes slowly, and is mostly observed in underground water or the water level in a dam body of a reservoir dam. In practice, the observation period is typically 4 hours, 24 hours or one week. The requirement of hydrological observation can be met by adjusting the detection period.
Specifically, the shape and material of the liquid level detector 7 in this embodiment need to be selected reasonably, and first, the weight of the liquid level detector 7 needs to meet the minimum frictional resistance required by the steel wire rope to drive the driven wheel, so as to ensure that the steel wire rope does not slide when passing through the driven wheel; and secondly, the rest parts of the liquid level detector 7 except the measuring part are wrapped by insulating materials.
Specifically, the dc geared motor 101 needs to be reasonably selected for the motor 101 in the power source, the rotation speed should not be too fast in the selection of the motor 101, and when the rotation speed is too fast, and the three states of the motor 101, i.e., stop rotation, forward rotation, and reverse rotation, are switched, the winding stability of the steel wire rope may be affected by mechanical inertia.
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 to the control module. Wherein the acquisition module is analog-to-digital conversion circuit, the control module is MCU, the communication module is modulation circuit and 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 perform remote software updating and upgrading through GPRS communication.
The server in the embodiment comprises a cloud platform 40, the platform has the functions of remote data receiving, data abnormity warning, timing report generation, data analysis and comparison, data prediction and the like, particularly, the platform is integrated with the butt joint of an AI (artificial intelligence) technology and a BIM (building information modeling) model, different types of structures can be monitored, manual data uploading and monitoring data downloading are supported, an API (application programming interface) is developed at the same time, and data calling is realized. The platform can be compatible with monitoring equipment of different monitoring factors and different hardware manufacturers, and can be used through logging in by a Web end 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 on various use scenes are met. The server may also use a virtual server.
The angular displacement sensor is selected in the embodiment, the effect of accurate metering can be achieved, and the measurement error is less than or equal to 2 mm.
The embodiment can be suitable for monitoring in various severe environments. The instrument is a full-sealing structure, and the built-in dehumidifying component is suitable for working in various environments, so that the measuring performance is prevented from being influenced or the measuring condition cannot be realized due to overhigh or overlow temperature.
The water level detector 7 in the pipeline 9 actively tracks and intelligently senses water level change, a water level monitoring threshold value in the pipeline 9 is set according to the requirements of various working conditions, the numerical value is fed back to a cloud end in real time, and the overrun abnormity is responded to and early-warned to a management party in time; due to the use of the cloud platform 40, reports and data are automatically generated, early warning valve values are set for different buildings, and the reports are sent to relevant units in real time for management.
It should be noted that, in this embodiment, the server, the cloud platform, and the controllers of some motor models belong to the control system.
Example 2
In an exemplary embodiment of the present invention, the present embodiment discloses a system for tracking and measuring a water level in a pipeline, which is different from embodiment 1 in that a chain transmission manner is used between a driven wheel 4 and an angular displacement sensor 5 in the present embodiment.
In yet another embodiment, the angular displacement sensor may also be directly connected to the driven wheel.
Example 3
In a typical implementation manner 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 adopt rollers.
Example 4
In an exemplary implementation manner of the present invention, this embodiment discloses a system for tracking and measuring a water level in a pipeline, which is different from embodiment 1 in that the number of auxiliary wheels in an auxiliary wheel set is a natural number other than 3.
Referring to fig. 5, in the present embodiment, the number of the auxiliary wheels in the auxiliary wheel set is 4, and compared to embodiment 1, one auxiliary wheel (the fourth auxiliary wheel 35) located at the extreme end in the present embodiment is significantly offset to the left side in the figure, so that the transmission cable obtains a better angle to wind around the driven wheel, and the contact area between the transmission cable and the driven wheel is increased.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A system for tracking and measuring water level in a pipeline, comprising:
the tail end of the transmission cable is connected with the liquid level detector;
the front end of the transmission cable is fixedly connected with the driving wheel which is also connected with a power source, and the driving wheel can drive the liquid level detector to operate according to a set program through the transmission cable;
the driven wheel is used for measuring the movement distance of the transmission cable, is synchronously connected with the angular displacement sensor through the transmission mechanism, and the transmission cable is wound around the driven wheel;
the control system, liquid level detector, power supply and angle displacement sensor connect control system, and control system can acquire liquid level detector positional information and angle displacement sensor's measured data, output power supply control signal in order to control liquid level detector according to the automatic procedure monitoring of setting for oneself.
2. The system as claimed in claim 1, further comprising an auxiliary pulley set, wherein the transmission cable passes through the driving pulley, the auxiliary pulley set and the driven pulley in sequence.
3. The system of claim 1, wherein the transmission mechanism is a gear train.
4. The system of claim 3, wherein the gear set comprises a first gear and a second gear in mesh, the first gear being coaxially coupled to the drive wheel and the second gear being coaxially coupled to the angular displacement sensor.
5. The system as claimed in claim 1 or 2, wherein the driving wheel and the driven wheel are connected to a vertical wall.
6. The system of claim 1, wherein the drive cable is no less than one-half of the circumference of the driven wheel at the contact surface.
7. The system as claimed in claim 2, wherein the auxiliary set of wheels includes a plurality of rotatable members, the drive cable being routed around each of the plurality of drive members.
8. The in-pipe water level tracking measurement system of claim 1, wherein the angular displacement sensor is mounted below the driven wheel.
9. The system of claim 1, wherein the level detector comprises a conductor and an insulator covering the outside of the conductor; the conductor has a tip portion capable of being in direct contact with the outside.
10. The system as claimed in claim 1, wherein the driving wheel and the driven wheel are rotating discs with grooves on the side surfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110592334.2A CN113324612B (en) | 2021-05-28 | 2021-05-28 | System for tracking and measuring water level in pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110592334.2A CN113324612B (en) | 2021-05-28 | 2021-05-28 | System for tracking and measuring water level in pipeline |
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| CN113324612A true CN113324612A (en) | 2021-08-31 |
| CN113324612B CN113324612B (en) | 2023-08-25 |
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Cited By (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 |
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| CN2460976Y (en) * | 1999-06-16 | 2001-11-21 | 华中光电技术研究所 | Constant tension servo-type float level meter |
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