CN204422016U - A kind of intelligent water-level meter - Google Patents
A kind of intelligent water-level meter Download PDFInfo
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- CN204422016U CN204422016U CN201520096386.0U CN201520096386U CN204422016U CN 204422016 U CN204422016 U CN 204422016U CN 201520096386 U CN201520096386 U CN 201520096386U CN 204422016 U CN204422016 U CN 204422016U
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Abstract
The utility model discloses a kind of intelligent water-level meter, comprise power module, microprocessor, water level signal acquisition module, input through keyboard module, communication interface modules, No. four relay output alarm modules, 4 ~ 20mA electric current loop output module and LED display module; Described power module is microprocessor power supply; Described water level signal acquisition module is all connected the input end of microprocessor with the output terminal of input through keyboard module; The output terminal of described microprocessor connects the input end of No. four relay output alarm modules, 4 ~ 20mA electric current loop output module and LED display module; Described communication interface modules and microprocessor are bi-directionally connected.The utility model has the input of collection multi-point mould analog quantity, acquisition precision is had precision by 12 ADC, the utility model selects function admirable, lower-cost SOC single-chip microcomputer C8051F021, the hardware circuit of whole system is simplified, reduce number of chips and take up room, save power consumption, improve stability, the reliability of system.
Description
Technical field
The utility model relates to a kind of intelligent water-level meter.
Background technology
In water conservancy, reservoir, oil depot, pumping plant, urban water supply, water level (lock position) is very important measurement parameter.But the problem such as system instability, poor anti jamming capability, precision are low, field modification program trouble that existing water-level gauge in use still exists.Along with developing rapidly of microelectronics, computing machine, network and mechanics of communication, smart instrumentation is widely used with advantages such as its high stability, high reliability, high precision, ease for maintenance in automatic detection and control system.Based on above analysis, the water-level gauge designed based on intelligent instrument has realistic meaning.
Utility model content
The purpose of this utility model saves power consumption, good stability, intelligent water-level meter that reliability is high.
The technical scheme realizing the utility model object is a kind of intelligent water-level meter, comprises power module, microprocessor, water level signal acquisition module, input through keyboard module, communication interface modules, No. four relay output alarm modules, 4 ~ 20mA electric current loop output module and LED display module; Described power module is microprocessor power supply; Described water level signal acquisition module is all connected the input end of microprocessor with the output terminal of input through keyboard module; The output terminal of described microprocessor connects the input end of No. four relay output alarm modules, 4 ~ 20mA electric current loop output module and LED display module; Described communication interface modules and microprocessor are bi-directionally connected.
Described microprocessor is SOC single-chip microcomputer C8051F021.
Described power module exports+24V voltage to No. four relay output alarm modules; Export+5V voltage to power to microprocessor, communication interface modules, input through keyboard module and LED display module.
Described water level signal acquisition module comprises level pressure sensor, variable-resistance transducer, intelligent multi-turn absolute value rotary encoder and analog to digital conversion circuit, and the water level signal that level pressure sensor, variable-resistance transducer and intelligent multi-turn absolute value rotary encoder collect is transferred to microprocessor after analog to digital conversion circuit.
Described communication interface modules comprises RS232 and RS485 two kinds of interfaces; RS232 interface adopts level transferring chip MAX3222; RS485 interface adopts level transferring chip SN65LBC184 and high-speed photoelectric coupler 6N136.
Described No. four relay output alarm modules comprise Darlington driving chip ULN2003 and four relay.
Described 4 ~ 20mA electric current loop output module comprises digital to analog converter AD421 and for the high-speed photoelectric coupler 6N136 with microprocessor 2 electrical isolation.
Have employed technique scheme, the utility model has following beneficial effect: (1) the utility model has the input of collection multi-point mould analog quantity, acquisition precision is had precision by 12 ADC, the utility model selects function admirable, lower-cost SOC single-chip microcomputer C8051F021, the hardware circuit of whole system is simplified, reduce number of chips and take up room, saving power consumption, improving stability, the reliability of system.
(2) water level acquisition of the present utility model can adopt multiple sensors.
(3) water-level gauge of the present utility model can complete multi-point with host computer.
(4) the utility model can complete the display of parameter and the setting of parameter by charactron or liquid crystal display as required.
(5) the utility model can manual initiation running parameter.
(6) the utility model can pass through the functions such as the duty of the regular storage slave computer of host computer monitoring software.
Accompanying drawing explanation
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is theory diagram of the present utility model.
Attached number in the figure is:
Power module 1, microprocessor 2, water level signal acquisition module 3, input through keyboard module 4, communication interface modules 5, No. four relay output alarm module 6,4 ~ 20mA electric current loop output module 7, LED display module 8.
Embodiment
(embodiment 1)
See Fig. 1, a kind of intelligent water-level meter of the present embodiment, comprises power module 1, microprocessor 2, water level signal acquisition module 3, input through keyboard module 4, communication interface modules 5, No. four relay output alarm module 6,4 ~ 20mA electric current loop output module 7 and LED display module 8; Power module 1 is powered for microprocessor 2; Water level signal acquisition module 3 is all connected the input end 2 of microprocessor 2 with the output terminal of input through keyboard module 4; The output terminal of microprocessor 2 connects the input end of No. four relay output alarm modules 6,4 ~ 20mA electric current loop output module 7 and LED display module 8; Communication interface modules 5 and microprocessor 2 are bi-directionally connected.
Power module 1 exports+24V voltage to No. four relay output alarm modules 6; Export+5V voltage to power to microprocessor 2, communication interface modules 5, input through keyboard module 4 and LED display module 8.
Microprocessor 2 is SOC single-chip microcomputer C8051F021.Microprocessor 2 is control cores of whole water-level gauge, the groundwork of this part is that the digital quantity of the water level signal of sensor measurement after A/D conversion is carried out data processing, send LED display module 8 to show on the one hand, compare with the water-level alarm value of setting on the other hand, judge whether to report to the police; Respective handling is made to the signal that input through keyboard module 4 inputs; Communicate with host computer, content comprises to be sent into host computer and preserves and carry out analyzing and processing to facilitate by measurement data, receive the Time of Day write clock module that host computer sends, and receives the setup parameter that host computer sends and also makes corresponding operating.SOC single-chip microcomputer C8051F021 inside is integrated with several functions parts, comprise the flash storage and WatchDog Timer etc. of UART, A/D converter, D/A converter, timer, 64KB, C8051F021 uses JTAG debud mode in sheet, enable this water-level gauge online updating upgrade software easily, thus reach the object upgrading upgrading whole system.
Water level signal acquisition module 3 comprises level pressure sensor, variable-resistance transducer, intelligent multi-turn absolute value rotary encoder and analog to digital conversion circuit, and the water level signal that level pressure sensor, variable-resistance transducer and intelligent multi-turn absolute value rotary encoder collect is transferred to microprocessor 2 after analog to digital conversion circuit.When adopting level pressure sensor to measure water level, water level is that zero what export to full scale height correspondence is the current signal of 4 ~ 20mA, by resistance, it is converted to the voltage signal of 0.4 ~ 2V, after the emitter follower be made up of AD623AN chip, send into the AIN1 end of the outer ADC conversion chip AD7705 of the sheet with 16 measuring accuracy, the digital signal be converted to sends into the MISO end of single-chip microcomputer SPI interface.With variable-resistance transducer measure water level export be voltage signal, no longer through the change-over circuit of current/voltage, the AIN0 end of direct feeding single-chip microcomputer C8051F021 chip, 12 ADC in single chip microcomputer are directly utilized to carry out analog to digital conversion, voltage reference adopts outside reference, and reference value is 2.5V.The position code that intelligence multi-turn absolute value rotary encoder exports is binary code or Gray code.Data are transmitted by RS485 mouth and single-chip microcomputer C8051F021.Single-chip microcomputer reads the data of scrambler by the mode that UART1 interrupts, and completes the measurement to water level.
Communication interface modules 5 comprises RS232 and RS485 two kinds of interfaces; RS232 interface adopts level transferring chip MAX3222; RS485 interface adopts level transferring chip SN65LBC184 and high-speed photoelectric coupler 6N136.
No. four relay output alarm modules 6 comprise Darlington driving chip ULN2003 and four relay.Four external electric secondary circuit of relay complete high water stage 1, high water stage 2, low-water level 1, low-water level 2 are reported to the police, and these four alarm water levels artificially can be set by input through keyboard or host computer interface.The I/0 mouth of SOC single-chip microcomputer C8051F021 sends digital output modul signal, drives relay by Darlington driving chip ULN2003, and make the relay normally open contact contact conducting of its correspondence, the warning circuit of outside serial connection starts to report to the police.
Data to be measured to be flowed to measuring equipment and signal need be converted to 4 ~ 20mA electric current loop.4 ~ 20mA electric current loop output module 7 comprises digital to analog converter AD421 and for the high-speed photoelectric coupler 6N136 with microprocessor 2 electrical isolation, the connection of AD421 and SOC single-chip microcomputer C8051F021 is only by three data lines: the SCK of the SPI interface of CLOCK and SOC single-chip microcomputer C8051F021 connects; The MOSI of the SPI interface of DATA and SOC single-chip microcomputer C8051F021 connects; LATCH is connected with the common I/O mouth P3.0 of single-chip microcomputer, the digital signal of the output of SOC single-chip microcomputer C8051F021 is directly converted to 4 corresponding ~ 20mA and exports.Digital to analog converter AD421 have employed high-speed photoelectric coupler 6N136 and single-chip microcomputer carries out Phototube Coupling, thus can effectively suppress external circuit signals to the interference of single-chip microcomputer, achieves and single-chip microcomputer electrical isolation completely.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. an intelligent water-level meter, is characterized in that: comprise power module (1), microprocessor (2), water level signal acquisition module (3), input through keyboard module (4), communication interface modules (5), No. four relay output alarm module (6), 4 ~ 20mA electric current loop output module (7) and LED display module (8); Described power module (1) is microprocessor (2) power supply; Described water level signal acquisition module (3) and the output terminal of input through keyboard module (4) are all connected the input end (2) of microprocessor (2); The output terminal of described microprocessor (2) connects the input end of No. four relay output alarm module (6), 4 ~ 20mA electric current loop output module (7) and LED display module (8); Described communication interface modules (5) and microprocessor (2) are bi-directionally connected.
2. a kind of intelligent water-level meter according to claim 1, is characterized in that: described microprocessor (2) is SOC single-chip microcomputer C8051F021.
3. a kind of intelligent water-level meter according to claim 1, is characterized in that: described power module (1) exports+24V voltage to No. four relay output alarm module (6); Export+5V voltage to power to microprocessor (2), communication interface modules (5), input through keyboard module (4) and LED display module (8).
4. a kind of intelligent water-level meter according to claim 1, it is characterized in that: described water level signal acquisition module (3) comprises level pressure sensor, variable-resistance transducer, intelligent multi-turn absolute value rotary encoder and analog to digital conversion circuit, the water level signal that level pressure sensor, variable-resistance transducer and intelligent multi-turn absolute value rotary encoder collect is transferred to microprocessor (2) after analog to digital conversion circuit.
5. a kind of intelligent water-level meter according to claim 1, is characterized in that: described communication interface modules (5) comprises RS232 and RS485 two kinds of interfaces; RS232 interface adopts level transferring chip MAX3222; RS485 interface adopts level transferring chip SN65LBC184 and high-speed photoelectric coupler 6N136.
6. a kind of intelligent water-level meter according to claim 1, is characterized in that: described No. four relay output alarm module (6) comprise Darlington driving chip ULN2003 and four relay.
7. a kind of intelligent water-level meter according to claim 1, is characterized in that: described 4 ~ 20mA electric current loop output module (7) comprises digital to analog converter AD421 and for the high-speed photoelectric coupler 6N136 with microprocessor (2) electrical isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096386.0U CN204422016U (en) | 2015-02-10 | 2015-02-10 | A kind of intelligent water-level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096386.0U CN204422016U (en) | 2015-02-10 | 2015-02-10 | A kind of intelligent water-level meter |
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| CN204422016U true CN204422016U (en) | 2015-06-24 |
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| CN201520096386.0U Expired - Fee Related CN204422016U (en) | 2015-02-10 | 2015-02-10 | A kind of intelligent water-level meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109634314A (en) * | 2019-01-11 | 2019-04-16 | 中铁隧道集团二处有限公司 | Intelligent water level measure and control device |
| CN113972915A (en) * | 2020-07-23 | 2022-01-25 | 中核核电运行管理有限公司 | Gray code signal setting threshold circuit of pressurized water reactor rod position measuring system |
-
2015
- 2015-02-10 CN CN201520096386.0U patent/CN204422016U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109634314A (en) * | 2019-01-11 | 2019-04-16 | 中铁隧道集团二处有限公司 | Intelligent water level measure and control device |
| CN113972915A (en) * | 2020-07-23 | 2022-01-25 | 中核核电运行管理有限公司 | Gray code signal setting threshold circuit of pressurized water reactor rod position measuring system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20180210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |