CN214151429U - Control system of magnetostrictive liquid level meter - Google Patents
Control system of magnetostrictive liquid level meter Download PDFInfo
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- CN214151429U CN214151429U CN202023161517.9U CN202023161517U CN214151429U CN 214151429 U CN214151429 U CN 214151429U CN 202023161517 U CN202023161517 U CN 202023161517U CN 214151429 U CN214151429 U CN 214151429U
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- power supply
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- level meter
- microprocessor mcu
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- 239000007788 liquid Substances 0.000 title claims abstract description 56
- 238000004891 communication Methods 0.000 claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 18
- 229910052744 lithium Inorganic materials 0.000 claims description 18
- 230000006855 networking Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000014509 gene expression Effects 0.000 description 1
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- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model discloses a control system of magnetostrictive liquid level meter, including microprocessor MCU, sensor measuring unit, the system still includes that the whole net leads to wireless communication unit, microprocessor MCU's input and sensor measuring unit are connected, microprocessor MCU's output leads to wireless communication unit with the whole net and is connected, the whole net leads to wireless communication unit and is connected to long-range central station through wireless communication mode. The utility model designs the functions of wireless transmission and remote data monitoring of the magnetostrictive liquid level meter, so that the acquisition of the liquid level information can be remotely acquired, and the magnetostrictive liquid level meter is convenient and efficient; the power supply management is more reliable, the power consumption is low, and the outdoor long-time operation can be adapted.
Description
Technical Field
The utility model relates to a measure technical field, in particular to control system of magnetostrictive liquid level meter.
Background
In the water conservancy industry, liquid level measurement stations are mostly in the field, the environment is complex, a magnetostrictive liquid level meter is often adopted to realize liquid level measurement, the magnetostrictive liquid level meter realizes liquid level measurement by utilizing the magnetostrictive effect of an internal waveguide wire material, and the magnetostrictive liquid level meter has the advantages of high measurement precision, safety and reliability in use, durability and the like, is widely applied to the field of measuring parameters such as liquid level and displacement, and is particularly suitable for occasions with severe working conditions. However, the control system of the magnetostrictive liquid level instrument in the prior art is simple, and the data acquisition mode is only a field acquisition mode, so that much inconvenience is caused, and the remote and quick data monitoring cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control system of a magnetostrictive liquid level meter, which can send acquired data to a remote place for monitoring, and can reduce electric quantity consumption and power consumption as much as possible.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a control system of magnetostrictive liquid level meter, includes microprocessor MCU, sensor measuring unit, the system still includes the whole net and leads to wireless communication unit, microprocessor MCU's input and sensor measuring unit are connected, microprocessor MCU's output leads to wireless communication unit with the whole net and is connected, the whole net leads to wireless communication unit and is connected to long-range central station through the wireless communication mode.
The microprocessor MCU is connected with the RS485 interface, and the RS485 interface is used for being connected with external debugging equipment and reading equipment.
The microprocessor MCU is connected with the zigbee communication unit, and adjacent magnetostriction meters are connected in a networking mode through the zigbee communication unit.
And the microprocessor MCU is respectively connected with the display and the infrared sensor, and the infrared sensor is used for detecting human body signals around the liquid level meter.
And the microprocessor MCU is connected with the storage unit and is used for storing historical liquid level data.
The control system further comprises a power supply management circuit, the power supply management circuit comprises a power supply and a voltage converter, the power supply converts voltage into voltage meeting the voltage required by each electric element in the liquid level meter after passing through the voltage converter, and the power supply comprises a lithium battery arranged in the liquid level meter and an external power supply connected through an interface arranged on the liquid level meter.
External power source is connected to the lithium battery charging module through the interface on the level gauge, the lithium battery charging module is connected to the lithium cell for charge for the lithium cell.
The external power supply is a solar cell.
The invention has the advantages that: the functions of wireless transmission and remote data monitoring of the magnetostrictive liquid level meter are designed, so that the liquid level information can be remotely acquired, and the magnetostrictive liquid level meter is convenient and efficient; the power supply management is more reliable, the power consumption is low, and the outdoor long-time operation can be adapted.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of the arrangement position of a display screen and an infrared switch of the invention on a prior art liquid level instrument;
FIG. 2 is a schematic diagram of the circuit structure of the present invention;
FIG. 3 is a diagram of the power management structure of the present invention;
FIG. 4 is a schematic diagram of the MCU connection of the present invention;
FIG. 5 is a schematic diagram of a controllable power supply of a full network communication unit;
FIG. 6 is a schematic diagram of the infrared switch controlling LCD power supply;
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The utility model provides a control system of magnetostrictive liquid level meter, includes microprocessor MCU, sensor measuring unit, the whole net leads to wireless communication unit, and microprocessor MCU's input and sensor measuring unit are connected, and microprocessor MCU's output leads to wireless communication unit with the whole net and is connected, the whole net leads to wireless communication unit and is connected to long-range central station through the wireless communication mode. The remote center station is used for sending data to the server for monitoring in a wireless communication mode, is a server terminal for receiving the data, is mainly used for receiving and displaying related data, and can also be used for building a cloud server system.
As shown in figure 1, the liquid level meter comprises a liquid crystal display, an electronic bin, a connecting piece, a waterproof aviation plug, a measuring rod, a floating ball, a check ring and a sealing plug, on the basis, the circuit in the electronic bin is improved, and an infrared sensor/infrared switch is additionally arranged on a shell of the liquid level meter to realize automatic display and close display.
The utility model provides a magnetostrictive liquid level meter control system collects power supply, collection, demonstration, communication function in an organic whole, and the circuit part of level gauge is whole to be divided into 4 circuit boards and designs, including main control circuit board, power strip, battery charging control circuit board, infrared switch circuit board, and these 4 circuit boards independent design install in the electron storehouse, connect through the connecting piece between the board. The functional module mainly comprises units such as power management, charging control, MCU, RS485 communication unit, whole network wireless communication, ZIGBEE communication, liquid crystal display control, storage unit, sensor measuring unit, LCD display unit and infrared switch. The intelligent charging system comprises a main control circuit board, an MCU, an RS485 communication unit, a whole-network wireless communication unit, a ZIGBEE communication unit, a liquid crystal display control unit, a storage unit, a sensor measurement unit and the like, wherein the MCU, the RS485 communication unit, the whole-network wireless communication unit, the ZIGBEE communication unit, the liquid crystal display control unit, the storage unit, the sensor measurement unit and the like are designed on the main control circuit board, and a circuit board is respectively and independently designed for charging control, an infrared switch and a power supply.
The circuit schematic diagram is shown in fig. 2, and the microprocessor MCU is connected to a full-network communication unit and is configured to communicate with a remote central station to transmit data to the remote central station.
The microprocessor MCU is connected with the ZIGBEE unit, the microprocessor MCU is connected with the ZIGBEE communication unit, and adjacent magnetostriction meters are connected in a networking mode through the ZIGBEE communication unit. Networking between each Zigbee unit and the adjacent Zigbee unit to form a Zigbee network, and sending out data through the whole network communication unit in one of the liquid level meters, thereby forming reliable sending.
And the microprocessor MCU is connected with the RS485 interface, and the RS485 interface is used for being connected with external debugging equipment and reading equipment.
The microprocessor MCU is respectively connected with the display and the infrared sensor, the infrared sensor is used for detecting human body signals around the liquid level meter, and the LCD display is used for realizing the display function of data.
And the microprocessor MCU is connected with the storage unit and is used for storing the historical liquid level data.
The power panel mainly manages a power supply and comprises a power supply management circuit, as shown in fig. 3, the power supply management circuit comprises a power supply and a voltage converter, the power supply converts voltage into voltage meeting the voltage required by each electric element in the liquid level meter after passing through the voltage converter, and the power supply comprises a lithium battery built in the liquid level meter and an external power supply connected through an interface arranged on the liquid level meter. The power management unit mainly converts a 12VDC power supply or an external 6-28 VDC power supply of the lithium battery into 4.1VDC and 3.3VDC power supplies to supply power for a circuit of the module, a main control circuit, an infrared switch, a liquid crystal display and the like. Meanwhile, according to the definition of each functional module, an independent power supply is adopted for supplying power, the MCU is used for controlling, the power supply is carried out when the MCU needs to work, and the MCU is switched off in other time, so that the low power consumption is realized. The MCU is controlled by a relay connected in series between the whole network communication unit and the LT3481 chip; the LCD power supply control is also controlled by a relay as a switch.
As shown in fig. 4, the microcontroller is responsible for interfacing with each functional module, realizes monitoring module application function, satisfies acquisition and communication requirements, and the MCU is connected with the LCD display, the infrared switch, the ZIGBEE communication module, the storage module, the sensor, the RS485 communication interface, and the wireless communication module for the whole network, and the MCU microprocessor mainly uses a chip with data processing and control functions to realize the functions, and uses a 51-series single chip microcomputer and its minimum system to realize the functions.
The whole network communication wireless communication unit is communicated with the MCU, and information such as liquid level calculated by the MCU is transmitted to the remote central station through the whole network communication antenna. Meanwhile, the module gives a GSM communication time window when the module is started up, and sets important or debugging parameters. In order to meet the requirement of remote control, a remote control communication time window is set, parameter setting is carried out through short messages, and the settable parameters comprise: destination address IP, port, working mode, mobile phone number, station number and water level reference value.
In order to realize the low power consumption target of the integrated liquid level meter, a power supply control circuit is designed, and a power supply switch of the whole network communication module is turned on and off at regular time by an MCU. As shown in fig. 5, when communication is required, the MCU controls the relay switch of the global network communication module to be turned on, or controls the relay switch to be turned off, so that the global network communication module operates with low power consumption, thereby reducing power consumption.
The sensor measuring unit collects displacement signals of the magnetostrictive sensor. External power source is connected to the lithium battery charging module through the interface on the level gauge, the lithium battery charging module is connected to the lithium cell for charge for the lithium cell. The external power source is a solar cell. And an external power supply access interface is reserved in consideration of power supply reliability. The charging control unit mainly realizes the charging control of the solar power supply or the external direct current power supply input to the lithium battery.
In order to realize data interaction with the MCU, the measurement information and the self-checking information are uploaded, and data and commands from the main control unit are received, so that the functions of setting field debugging parameters, acquiring historical data and the like are realized.
The LCD display unit adopts a backlight type Chinese character LCD, mainly realizes the functions of water level, liquid level, operation parameters (system time, system station number), battery voltage and the like, and simultaneously achieves the aim of low power consumption by being powered by a controlled power supply.
As shown in fig. 6, the display screen is just power supply work when needs show, sets up automatically controlled switches such as relay between display and power, and infrared switch detects infrared human body signal, and when the human body was close, this relay of MCU control is closed to make LCD power supply work, thereby show data, when human principle, thereby the disconnected power supply is out of work, and this kind of mode also can reduce the consumption, increases continuation of the journey etc.. Human body approaching is sensed through infrared rays, sensing signals are transmitted to the MCU, and the LCD display unit is started by the MCU.
The human body approach sensing unit adopts a si1141 integrated chip, and an infrared sensor can be flexibly placed behind a semitransparent product covering. The ambient light sensor is capable of sensing up to 128kilolux of light. In addition, the advanced architecture of si1141 can complete proximity sensing measurement within 25us, reduce the turn-on time of the infrared diode which consumes extremely high power, and realize the lowest system power consumption (9uA average current, 0.5uA standby current) in the industry.
ZIGBEE communication unit: with the fact that the application range of the Internet of things is wider and wider, considering that part of sites are closer in distance, if all the sites are transmitted to a central station in a wireless mode, the cost is higher, and a ZIGBEE communication unit is designed and used for near-distance ad hoc network communication of a liquid level meter.
A storage unit: the device can locally store 4M liquid level historical data while finishing data acquisition and sending, cannot be lost when power failure occurs, and can send the data to the central station for data additional recording to keep the integrity of the data when the communication of the equipment is normal. During field maintenance, data can be exported through the RS485 interface, data loss caused by communication faults is avoided, and system reliability is improved to the maximum extent.
The invention mainly improves the following points:
1) the method comprises the steps of classifying units needing low power consumption control, independently supplying power by using a controllable power supply, designing a power supply management circuit, and dynamically opening and closing a power supply switch to realize that the working power consumption of the liquid level meter is less than 300mA @12V and the dormancy power consumption is less than 200uA @ 12V.
(2) The 4M historical data can be stored locally, and the data is sent to the central station for data supplement and recording, so that the integrity of the data is kept. During field maintenance, data can be led out through the RS485 interface, data loss caused by communication faults is avoided, and system reliability is improved to the maximum extent.
(3) And RS485 communication, whole network communication wireless communication and ZIGBEE ad hoc network communication are supported.
(4) The remote parameter setting function is realized in a remote control communication time window through short messages.
(5) The low power consumption infrared switch is arranged on the surface of the liquid level meter below the liquid crystal display, as shown in figure 1. A circuit for controlling the display of the LCD through the MCU by giving a trigger signal by the infrared switch is designed.
THE ADVANTAGES OF THE PRESENT INVENTION
(1) The utility model discloses have that the precision is high, simple to operate, do not need the later stage to mark, it is convenient to maintain, and the simultaneous measurement adopts the non-contact mode, and the good reliability can use under adverse circumstances.
(2) The utility model discloses an integrated design, one set of equipment collection is gathered, is shown, is supplied power, is communicated in an organic whole, more conventional liquid level collection system, the cost reduction.
(3) The utility model discloses realize the low-power consumption operation, but built-in rechargeable lithium cell satisfies the long-time operation needs of equipment. Meanwhile, an external power supply interface is reserved, and power supply reliability is enhanced.
(4) The utility model discloses have local storage and remote data additional recording function, guarantee that the data is complete.
(5) The utility model discloses the network communication is various, and the network deployment is nimble.
(6) The utility model discloses can long-rangely carry out the parameter setting, the fortune dimension is convenient.
(7) The utility model discloses an infrared on-off control LCD of low-power consumption shows, when reducing the consumption, fortune dimension is convenient, life extension.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A control system of a magnetostrictive liquid level meter comprises a microprocessor MCU and a sensor measuring unit, and is characterized in that: the system also comprises a whole-network wireless communication unit, wherein the input end of the microprocessor MCU is connected with the sensor measuring unit, the output end of the microprocessor MCU is connected with the whole-network wireless communication unit, and the whole-network wireless communication unit is connected to the remote central station in a wireless communication mode;
the control system further comprises a power supply management circuit, the power supply management circuit comprises a power supply and a voltage converter, the power supply converts voltage into voltage meeting the voltage required by each electric element in the liquid level meter after passing through the voltage converter, and the power supply comprises a lithium battery arranged in the liquid level meter and an external power supply connected through an interface arranged on the liquid level meter.
2. A control system for a magnetostrictive liquid level gauge as claimed in claim 1, characterized in that: the microprocessor MCU is connected with the RS485 interface, and the RS485 interface is used for being connected with external debugging equipment and reading equipment.
3. A control system for a magnetostrictive liquid level gauge as claimed in claim 1, characterized in that: the microprocessor MCU is connected with the zigbee communication unit, and adjacent magnetostriction meters are connected in a networking mode through the zigbee communication unit.
4. A control system for a magnetostrictive liquid level gauge as claimed in claim 1, characterized in that: and the microprocessor MCU is respectively connected with the display and the infrared sensor, and the infrared sensor is used for detecting human body signals around the liquid level meter.
5. A control system for a magnetostrictive liquid level gauge as claimed in claim 1, characterized in that: and the microprocessor MCU is connected with the storage unit and is used for storing historical liquid level data.
6. A control system for a magnetostrictive liquid level gauge as claimed in claim 1, characterized in that: external power source is connected to the lithium battery charging module through the interface on the level gauge, the lithium battery charging module is connected to the lithium cell for charge for the lithium cell.
7. A control system for a magnetostrictive liquid level gauge as claimed in claim 6, characterized in that: the external power supply is a solar cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023161517.9U CN214151429U (en) | 2020-12-22 | 2020-12-22 | Control system of magnetostrictive liquid level meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023161517.9U CN214151429U (en) | 2020-12-22 | 2020-12-22 | Control system of magnetostrictive liquid level meter |
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| CN214151429U true CN214151429U (en) | 2021-09-07 |
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| CN202023161517.9U Active CN214151429U (en) | 2020-12-22 | 2020-12-22 | Control system of magnetostrictive liquid level meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984133A (en) * | 2021-10-28 | 2022-01-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter |
| CN114061696A (en) * | 2021-11-25 | 2022-02-18 | 北京斯克维思仪表有限公司 | Large-capacity magnetostrictive liquid level meter and detection system |
-
2020
- 2020-12-22 CN CN202023161517.9U patent/CN214151429U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984133A (en) * | 2021-10-28 | 2022-01-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter |
| CN113984133B (en) * | 2021-10-28 | 2023-01-24 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter |
| CN114061696A (en) * | 2021-11-25 | 2022-02-18 | 北京斯克维思仪表有限公司 | Large-capacity magnetostrictive liquid level meter and detection system |
| CN114061696B (en) * | 2021-11-25 | 2022-12-02 | 北京斯克维思仪表有限公司 | Large-capacity magnetostrictive liquid level meter and detection system |
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