CN205449869U - Take two line toxic gas detectors of digital display function - Google Patents
Take two line toxic gas detectors of digital display function Download PDFInfo
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- CN205449869U CN205449869U CN201620240678.1U CN201620240678U CN205449869U CN 205449869 U CN205449869 U CN 205449869U CN 201620240678 U CN201620240678 U CN 201620240678U CN 205449869 U CN205449869 U CN 205449869U
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Abstract
The utility model belongs to the technical field of gas detection, especially, relate to a take two line toxic gas detectors of digital display function, including toxic gas detection circuit, AD gather treatment circuit, main chip control circuit, display circuit, infrared keying circuit, 4 20mA output control circuit and power supply circuit, the toxic gas detection circuit is surveyed the gas strength and is converted voltage signal to and send AD to and gather the treatment circuit and enlarge and handle the back, and main chip control circuit is gathered the treatment circuit to AD and is visited, the processing that shows, judges, reports to the police of main chip control circuit control display circuit, and main chip control circuit control returns to zero the demarcation through infrared keying circuit and calibrates, does main chip control circuit pass through PWM output control 4 the accurate output of 20mA output circuit, the utility model discloses can realize that two line toxic gas survey 4 20mA makes things convenient for data upload, realize digital display, infrared remote control, toxic gas surveys intelligent, modularization.
Description
Technical field
This utility model belongs to detection of gas technical field, particularly relates to two line detector for poisonous gas of a kind of band digital display function.
Background technology
The toxic gas such as carbon monoxide, hydrogen sulfide, ammonia, chlorine all can produce in a lot of environment of productive life, the safety of life and property of serious threat people, detector for poisonous gas can detect some poisonous gas in environment timely, show gas concentration in real time, upload warning just can accomplish to monitor in time, it is ensured that safety.Tradition two line detector for poisonous gas often do not accomplish low-power consumption, it is impossible to show in real time, are inconvenient to operate yet, be unfavorable for scheduling and planning and accurate alignment, are unfavorable for poisonous gas sense circuitry modules.The present invention uses low-power consumption, electric current loop, and infrared remote control button can realize two line 4-20mA detector for poisonous gas of band digital display function, meets some and likely has the occasion use that poisonous gas produces.
Utility model content
The purpose of this utility model is to solve the demand of current above-mentioned existence.This gas detector good stability, easy to maintenance, there is the functions such as display in real time, the detection of infrared remote control button operation, poisonous gas and two line 4-20mA outputs, more modularity, intellectuality.
The technical solution adopted in the utility model is for achieving the above object: two line detector for poisonous gas of a kind of band digital display function, it is characterised in that: include poisonous gas sensing circuit, AD acquisition process circuit, master chip control circuit, display circuit, Infrared push button circuit, 4-20mA output control circuit and power circuit；Described poisonous gas sensing circuit outfan connects AD acquisition process circuit；Described AD acquisition process circuit output end connects master chip control circuit；Described master chip control circuit outfan connects display circuit；Described master chip control circuit outfan connects 4-20mA output control circuit；Described Infrared push button circuit output end connects master chip control circuit；It is that whole Circuits System is powered that power circuit saves power consumption by electric current loop mode.
Described poisonous gas sensing circuit probe gas concentration be converted into voltage signal deliver to AD acquisition process circuit be amplified process after, AD acquisition process circuit is conducted interviews by master chip control circuit, described master chip control circuit control display circuit carry out showing, judge, alert process, described master chip control circuit controls to carry out zeroing by Infrared push button circuit and demarcates calibration, and described master chip control circuit controls 4-20mA output circuit by PWM output and accurately exports.
Described master chip control circuit single-chip microcomputer uses low-power microprocessor PIC16LF1704 chip to be controlled, and PIC16LF1704 chip carries PWM output function, more convenient control 4-20mA output circuit；PWM output signal first passes through 2 grades of low-pass filtering, is re-fed into 4-20mA output circuit, and simple circuit is reliable.
Its feature 4-20mA output circuit described uses low consumed power operational amplifier mcp6001.4-20mA signal can facilitate information to transmit with other systems such as access controllers, and beneficially system integration monitoring processes.
Described power circuit uses electric current loop mode to be that whole Circuits System is powered, and saves power consumption.Constant-current source circuit realizes 5v and 10v voltage by voltage stabilizing chip and exports, and 5v, as the ground of 10v voltage, powers to circuit respectively and can realize electric current loop mode, saves power consumption.
Described Infrared push button circuit uses infrared remote control mode, saves power consumption, easy to operate.Use conventional IR remote controller and infrared receiving tube, detect button by master chip, process, it is achieved various operations.Detector for poisonous gas needs calibration before dispatching from the factory, and can control, plus display circuit intuitively, the operations such as demarcation of returning to zero by infrared remote control mode easily, be also convenient for user and carry out checking, operating.
Described poisonous gas sense circuitry modules；Poisonous gas sensing circuit is independent wiring board, designs different wiring boards for two electrodes and three electrode sensors, coordinates main circuit board to use, is convenient for changing.Three electrode sensors use high-operational amplifier, utilize permanent potential circuit can realize the concentration collection output concentration voltage signal of high accuracy and stability.Two electrode sensors use resistance sampling to amplify, simple and stable.
The present invention has the advantages that compared with the prior art
1, this utility model can realize two line poisonous gas detections, and 4-20mA facilitates data to upload.
2, this utility model can be with numerical monitor, infrared remote control, and poisonous gas detection is intelligent, modularity.
3, this utility model can realize producing and using more convenient convenience.
Accompanying drawing explanation
Fig. 1 is the theory diagram of two line detector for poisonous gas of this utility model a kind of band digital display function.
Fig. 2 is the power circuit current direction figure of two line detector for poisonous gas of this utility model a kind of band digital display function.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described.
This utility model is made up of poisonous gas sensing circuit 1, AD acquisition process circuit 2, master chip control circuit 3, display circuit 4, Infrared push button circuit 5,4-20mA output control circuit 6, power circuit 7 as shown in Figure 1.
Power circuit 7 is from top to down as shown in Figure 2, flows through display circuit 4, returns to ground through master chip control circuit and AD Acquisition Circuit 2, and circuit operating current is less than 4mA.
A kind of two line detector for poisonous gas of band digital display function, it is characterised in that: include poisonous gas sensing circuit 1, AD acquisition process circuit 2, master chip control circuit 3, display circuit 4, Infrared push button circuit 5,4-20mA output control circuit 6 and power circuit 7；Described poisonous gas sensing circuit 1 outfan connects AD acquisition process circuit 2；Described AD acquisition process circuit 2 outfan connects master chip control circuit 3；Described master chip control circuit 3 outfan connects display circuit 4；Described master chip control circuit 3 outfan connects 4-20mA output control circuit 6；Described Infrared push button circuit 5 outfan connects master chip control circuit 3；It is that whole Circuits System is powered that power circuit 7 saves power consumption by electric current loop mode.
Described poisonous gas sensing circuit 1 probe gas concentration be converted into voltage signal deliver to AD acquisition process circuit 2 be amplified process after, AD acquisition process circuit 2 is conducted interviews by master chip control circuit 3, described master chip control circuit 3 control display circuit 4 carry out showing, judge, alert process, described master chip control circuit 3 controls to carry out zeroing by Infrared push button circuit 5 and demarcates calibration, and described master chip control circuit 3 controls 4-20mA output circuit 6 by PWM output and accurately exports.
Described master chip control circuit 3 single-chip microcomputer uses low-power microprocessor PIC16LF1704 chip to be controlled, and PIC16LF1704 chip carries PWM output function, more convenient control 4-20mA output circuit；PWM output signal first passes through 2 grades of low-pass filtering, is re-fed into 4-20mA output circuit, and simple circuit is reliable.
Its feature 4-20mA output circuit 6 described uses low consumed power operational amplifier mcp6001.4-20mA signal can facilitate information to transmit with other systems such as access controllers, and beneficially system integration monitoring processes.
Described power circuit 7 uses electric current loop mode to be that whole Circuits System is powered, and saves power consumption.Constant-current source circuit realizes 5v and 10v voltage by voltage stabilizing chip and exports, and 5v, as the ground of 10v voltage, powers to circuit respectively and can realize electric current loop mode, saves power consumption.
Described Infrared push button circuit 5 uses infrared remote control mode, saves power consumption, easy to operate.Use conventional IR remote controller and infrared receiving tube, detect button by master chip, process, it is achieved various operations.Detector for poisonous gas needs calibration before dispatching from the factory, and can control, plus display circuit 4 intuitively, the operations such as demarcation of returning to zero by infrared remote control mode easily, be also convenient for user and carry out checking, operating.
Described poisonous gas sensing circuit 1 modularity；Poisonous gas sensing circuit 1 is independent wiring board, designs different wiring boards for two electrodes and three electrode sensors, coordinates main circuit board to use, is convenient for changing.Three electrode sensors use high-operational amplifier, utilize permanent potential circuit can realize the concentration collection output concentration voltage signal of high accuracy and stability.Two electrode sensors use resistance sampling to amplify, simple and stable.
This utility model poisonous gas sense circuitry modules is passed through chemical reaction probe gas mainly for electrochemical sensor probe gas, electrochemical sensor, is consumed circuital current hardly.Coordinate high-operational amplifier, utilize permanent potential circuit can realize the concentration collection output concentration voltage signal of high accuracy and stability, deliver to A/D chip and process.Poisonous gas sensing circuit 1 is standalone sensor plate, is convenient for changing sensor, it is achieved modularity.
Employing PIC16LF1704 chip described in the utility model, has low-power consumption and PWM output function.Master chip, by I2C mode and A/D chip communication, carries out judgement process to the AD signal received, and concentration information shows and exports the 4-20mA signal of correspondence in real time.If the infrared remote control key-press input of master chip detection simultaneously, make respective handling reaction.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.
Claims (6)
1. two line detector for poisonous gas of a band digital display function, it is characterised in that: include poisonous gas sensing circuit (1), AD acquisition process circuit (2), master chip control circuit (3), display circuit (4), Infrared push button circuit (5), 4-20mA output control circuit (6) and power circuit (7)；Described poisonous gas sensing circuit (1) outfan connects AD acquisition process circuit (2)；Described AD acquisition process circuit (2) outfan connects master chip control circuit (3)；Described master chip control circuit (3) outfan connects display circuit (4)；Described master chip control circuit (3) outfan connects 4-20mA output control circuit (6)；Described Infrared push button circuit (5) outfan connects master chip control circuit (3)；Power circuit (7) is that whole Circuits System is powered；
Described poisonous gas sensing circuit (1) probe gas concentration be converted into voltage signal deliver to AD acquisition process circuit (2) be amplified process after, AD acquisition process circuit (2) is conducted interviews by master chip control circuit (3), described master chip control circuit (3) controls display circuit (4) and shows, judge, alert process, described master chip control circuit (3) controls to carry out zeroing by Infrared push button circuit (5) and demarcates calibration, described master chip control circuit (3) controls 4-20mA output circuit (6) by PWM output and accurately exports.
A kind of two line detector for poisonous gas of band digital display function, it is characterized in that, described master chip control circuit (3) single-chip microcomputer uses low-power microprocessor PIC16LF1704 chip, and chip belt PWM output is convenient controls 4-20mA output.
Two line detector for poisonous gas of a kind of band digital display function, it is characterised in that described 4-20mA output control circuit (6) uses low-power chip mcp6001.
Two line detector for poisonous gas of a kind of band digital display function, it is characterised in that described power circuit (7) uses electric current loop mode to be that whole Circuits System is powered.
Two line detector for poisonous gas of a kind of band digital display function, it is characterised in that described Infrared push button circuit (5) uses infrared remote control mode.
Two line detector for poisonous gas of a kind of band digital display function, it is characterised in that described poisonous gas sensing circuit (1) modularity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240678.1U CN205449869U (en) | 2016-03-28 | 2016-03-28 | Take two line toxic gas detectors of digital display function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620240678.1U CN205449869U (en) | 2016-03-28 | 2016-03-28 | Take two line toxic gas detectors of digital display function |
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| Publication Number | Publication Date |
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| CN205449869U true CN205449869U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620240678.1U Active CN205449869U (en) | 2016-03-28 | 2016-03-28 | Take two line toxic gas detectors of digital display function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717173A (en) * | 2016-03-30 | 2016-06-29 | 济南本安科技发展有限公司 | Two-wire toxic gas detector with digital display function |
-
2016
- 2016-03-28 CN CN201620240678.1U patent/CN205449869U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717173A (en) * | 2016-03-30 | 2016-06-29 | 济南本安科技发展有限公司 | Two-wire toxic gas detector with digital display function |
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