CN2884198Y - Composite sensor for methane and temp. - Google Patents
Composite sensor for methane and temp. Download PDFInfo
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- CN2884198Y CN2884198Y CN 200620022734 CN200620022734U CN2884198Y CN 2884198 Y CN2884198 Y CN 2884198Y CN 200620022734 CN200620022734 CN 200620022734 CN 200620022734 U CN200620022734 U CN 200620022734U CN 2884198 Y CN2884198 Y CN 2884198Y
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Abstract
The utility model discloses a methane and temperature combined sensor, comprising a micro control unit, a methane detection circuit, an amplifying circuit, a methane signal display circuit, a methane signal output circuit, an acousto-optic alarm circuit, a power-off signal output circuit, a power supply circuit, and also a temperature detection circuit, a temperature signal display circuit, a temperature signal output circuit, a keyboard and a remote control receiving circuit. The amplifying circuit, the methane signal display circuit, the methane signal output circuit, the acousto-optic alarm circuit, the power-off signal output circuit, the temperature detection circuit, the temperature signal display circuit, the temperature signal output circuit, the keyboard and the remote control receiving circuit are all connected with the corresponding ports of a single-chip microcomputer. The utility model has the advantages that: the sensor has simple structure and can simultaneously monitor the temperature and the concentration of methane, the transmission of the power and signal can be performed only by a multi-core cable so as to reduce the cost and power consumption, and the utility model has high cost performance and convenient field construction.
Description
Technical field
The utility model relates to a kind of sensor, specifically is a kind of methane, temperature combination sensor.
Background technology
In industries such as mining, be provided with various sensors in the mine, in order to detect all gases concentration, guarantee safety.At present, online detecting sensor all is a simple function, a sensor can only detect a kind of gas, a kind of " being used to monitor the device of methane concentration " disclosed as Chinese patent ZL91111984.1, this device comprises that methane concentration detects bridge, single-chip microprocessor system and methane concentration transfinite sound, optical alarm circuit, the methane concentration digital display circuit, the methane concentration signal output apparatus and the outage controlling output circuit.This device can carry out continuous detection to methane concentration, and also needs environment temperature and other gas concentration are monitored in the general ore deposit, so other sensors just need be set in addition, has not only increased power consumption, has increased cost, also is not easy to site operation.In addition, present methane detection element is when powering on, electric current can impact to the probe of detecting element, dash current can make shorten the serviceable life of detecting element probe, also cause sensor stability poor, make the operating point drift of sensor, the probe of detecting element is damaged.In the process that detects, on-the-spot staff can not in time understand the communication state between spot sensor and the monitoring station.
The utility model content
The purpose of this utility model provides the combination sensor of a kind of on-line monitoring methane simultaneously and temperature.
Further purpose of the present utility model provides a kind of buffer circuit that powers on methane, temperature combination sensor, that the voltage on the methane detection element is slowly risen that is applied to.
Further purpose of the present utility model provides a kind of communication state observation circuit methane, temperature combination sensor, that can show communication state between sensor and the monitoring station at the scene that is applied to.
The technical solution of the utility model is: a kind of methane, temperature combination sensor, has single-chip microcomputer, methane testing circuit, amplifying circuit,, methane signal display circuit, methane signal output apparatus, sound light alarming circuit, power-off signal output circuit and power circuit; Described methane testing circuit is connected with amplifying circuit, and described amplifying circuit, methane signal display circuit, methane signal output apparatus, sound light alarming circuit, power-off signal output circuit all are connected with the corresponding port of single-chip microcomputer; It is characterized in that: also have temperature sensing circuit, temperature signal display circuit, temperature signal output circuit, keyboard and remote-control receiving circuit; Described temperature sensing circuit, the temperature signal display circuit, the temperature signal output circuit, keyboard all is connected with the corresponding port of single-chip microcomputer with remote-control receiving circuit.
Described methane testing circuit also is connected with the detecting element buffer circuit that powers on.
Described detecting element powers on buffer circuit by operational amplifier N3D, and triode Q6, Q7, electrochemical capacitor C6～C8, capacitor C 5 and resistance R 17, R18, R19, R24, R36 connect and compose; Resistance R 17, R19 series connection back one end ground connection, the other end is connected with power circuit, resistance R 17, the junction of R19 is connected with the positive input of operational amplifier N3D, the inverting input of N3D is by resistance R 18 ground connection, the base stage of the output terminal of operational amplifier N3D and triode Q7 is connected with resistance R 24, the emitter of triode Q7 is connected with a signal end of single-chip microcomputer, be connected with resistance R 36 between the base stage of the collector of triode Q7 and triode Q6, the emitter of triode Q6 is connected with power circuit, the collector of triode Q6 is connected with the detecting element probe as output terminal, also is connected with electrochemical capacitor C7 between the emitter of triode Q6 and the base stage; The positive pole of electrochemical capacitor C8, C6 all is connected with the output terminal of the buffer circuit that powers on, and the negative pole of C8 is connected with the inverting input of operational amplifier N3D, the minus earth of C6, and capacitor C 5 is connected in parallel on the C6 two ends; Detecting element is when powering on, and capacitor C 8, C6 slowly rise the voltage of output terminal through repeated charge, reach steady state (SS) at last.
Described methane signal output apparatus and temperature signal output circuit also are connected with the communication state observation circuit respectively; Described communication state observation circuit is monitored the communications status of communication line in real time, and at the scene communication state is shown by its light emitting diode.
Described communication state observation circuit includes light coupling relay and light emitting diode; Two control ends of light coupling relay are connected with loaded line with the output terminal of above-mentioned signal output apparatus respectively, one output terminal of light coupling relay is connected with ground, another output terminal is connected with a signal output part of single-chip microcomputer with the VB end of power circuit respectively, light emitting diode is connected with a signal output part of single-chip microcomputer, by the conducting of Single-chip Controlling light emitting diode.
Described light coupling relay model is TLP521.
Described temperature sensing circuit has the temperature-sensing element (device) that model is DS18B20.
Described single-chip microcomputer model is PIC16F877.
Described remote-control receiving circuit has the receiver of remote-control sytem that model is TL1838A2.
The utility model technique scheme has the following advantages compared to existing technology: (1) is with respect to discrete temperature sensor and methane transducer, this combination sensor is simple in structure, the temperature of energy while monitoring of environmental and the concentration of methane, only carry out the conveying of power supply and the transmission of signal by a polycore cable, reduced cost, reduced power consumption, had high cost performance, site operation is easy.(2) Connect Power on the methane detection element behind the buffer circuit, the voltage on the methane detection element is slowly risen, effectively protect the methane detection element probe, prolong the serviceable life of detecting element, improved the stability of sensor.(3) be provided with the communication state observation circuit after, can make on-the-spot staff can in time understand communication state between sensor and the monitoring station.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the utility model theory diagram;
Fig. 2 is the schematic diagram of power circuit among the embodiment;
Fig. 3 is the power on schematic diagram of buffer circuit of detecting element among the embodiment;
Fig. 4 is the schematic diagram of methane, temperature sensing circuit and amplifying circuit thereof among the embodiment;
Fig. 5 is the schematic diagram of single-chip microcomputer and keyboard, remote-control receiving circuit and display circuit among the embodiment;
Fig. 6 is the schematic diagram of sound light alarming circuit and power-off signal output circuit among the embodiment;
Fig. 7 is methane and a temperature signal output circuit schematic diagram among the embodiment.
Embodiment
See Fig. 1, the methane of present embodiment, temperature combination sensor have single-chip microcomputer, the methane testing circuit, amplifying circuit, methane signal display circuit, the methane signal output apparatus, temperature sensing circuit, temperature signal display circuit, temperature signal output circuit, keyboard, remote-control receiving circuit, sound light alarming circuit, power-off signal output circuit and power circuit.The methane testing circuit is connected with amplifying circuit, and the output terminal of amplifying circuit is connected with the output terminal of the temperature sensing circuit signal input part corresponding with single-chip microcomputer.Methane signal display circuit, methane signal output apparatus, temperature signal display circuit, temperature signal output circuit, keyboard, remote-control receiving circuit, sound light alarming circuit and power-off signal output circuit all are connected with the corresponding port of single-chip microcomputer.Power circuit provides working power for each circuit.
See Fig. 2, power circuit is that the integrated circuit N1 of LM2675-ADJ, operational amplifier N6A and peripheral capacitor C 2～C4, C0, C12, C19, C20, resistance R 1, R25, R55, R56, variable resistor W1, inductance L 1, diode D1, D2, the Q9 that model is LM358 connect and compose by model.Power circuit provides required power supply for each circuit.
See Fig. 3 and Fig. 4, the methane testing circuit includes catalytic gas sensor that model is MC112 and peripheral resistance R 14, R16, W2, capacitor C 1, and the detecting element buffer circuit that powers on.Resistance R 14, R16, W2 and catalytic gas sensor are formed bridge circuit.See Fig. 3, detecting element powers on buffer circuit by operational amplifier N3D, and triode Q6, Q7, electrochemical capacitor C6～C8, capacitor C 5 and resistance R 17, R18, R19, R24, R36 connect and compose; Resistance R 17, R19 series connection back one end ground connection, the other end is connected with the VB end of power circuit, resistance R 17, the junction of R19 is connected with the positive input of operational amplifier N3D, the inverting input of N3D is by resistance R 18 ground connection, the base stage of the output terminal of operational amplifier N3D and triode Q7 is connected with resistance R 24, the emitter of triode Q7 is connected with the P24 of single-chip microcomputer end, be connected with resistance R 36 between the base stage of the collector of triode Q7 and triode Q6, the emitter of triode Q6 is connected with the VB of power circuit end, the collector of triode Q6 is connected with the gas sensor of detecting element as output terminal, also is connected with electrochemical capacitor C7 between the emitter of triode Q6 and the base stage; The positive pole of electrochemical capacitor C8, C6 all is connected with the output terminal of the buffer circuit that powers on, and the negative pole of C8 is connected with the inverting input of operational amplifier N3D, the minus earth of C6, and capacitor C 5 is connected in parallel on the C6 two ends; Detecting element is when powering on, and electrochemical capacitor C6, C8 slowly rise the voltage of output terminal through repeated charge, reach steady state (SS) at last.
See Fig. 4, the signal output part of methane testing circuit is connected with amplifying circuit, and amplifying circuit is connected and composed by operational amplifier N3A, N3B, N3C and peripheral resistance R 9～R13, R15, R23, R42～R44, variable resistor W3, capacitor C 13～C16.Amplifying circuit amplifies the signal of methane testing circuit output, and the I/O mouth that outputs to single-chip microcomputer then carries out data acquisition.Temperature sensing circuit is that detector unit and the peripheral resistance R 41 of 18B20 connects and composes by model.The output terminal output signal of detector unit is carried out data acquisition by the RE2 of single-chip microcomputer end.
See Fig. 5, methane display circuit and temperature display circuit are connected and composed by charactron Z1～Z8 and peripheral resistance R 28～R35, R53, R54, R57, R62, R64, R66, triode Q10～Q12, Q14～Q16.Display circuit adopts dynamic scan to show, by eight segment encodes of 8 I/O mouth parallel output data control charactrons of single-chip microcomputer, the position that other 6 I/O mouth RC6, RB3, RC7 and RA1, RE1, RA4 control charactron respectively shows.Single-chip microcomputer N4 model is PIC-16F877.Keyboard is connected and composed by switch key S0～S4, resistance R 48～R51, electrochemical capacitor C18, is connected with the control signal end of single-chip microcomputer.Use keyboard to reset, and systematic parameters such as zero point, enlargement factor, nonlinear compensation coefficient are provided with.Remote-control receiving circuit is that the receiver of remote-control sytem N5 of TL1838A2 and peripheral resistance R 52, electrochemical capacitor C17 connect and compose by model.Receiver of remote-control sytem and telepilot are used, and can be provided with systematic parameter.
See Fig. 6, sound light alarming circuit is connected and composed by four LED 1～LED4, diode D3, resistance R 58～R61, triode Q13, operational amplifier N6B and hummer.Four LED 1～LED4 and hummer are for being connected in parallel.The I/O mouth P34 end output high level of single-chip microcomputer is by the open and close of resistance R 60 and triode Q13 control warning circuit.When detected numerical value surpasses setting, the I/O mouth P34 of single-chip microcomputer end output high level, the Q13 conducting, light emitting diode is bright, buzzer call.The power-off signal output circuit is connected and composed by triode Q17～Q19, resistance R 47, R63, R65, R67, R68.Sensor to value when exceeding safe range, the I/O mouth P35 end output high level of single-chip microcomputer, Pout end by resistance R 63 and triode Q17 control power-off signal output circuit is exported power-off signal to monitoring station, and monitoring station can cut off the power supply as the case may be.
See Fig. 7, the methane signal output apparatus is connected and composed by triode Q1～Q3 and resistance R 2～R5, R40.The methane signal output apparatus is by the RC1 foot control system of single-chip microcomputer, single-chip microcomputer is converted into the frequency signal of 200～1000Hz with detected methane concentration value (0～4%), by the output of RC1 pin, when RC1 pin output high level, the Q3 conducting makes the methane signal output apparatus export the current signal of 5mA.
The output terminal of methane signal output apparatus and corresponding methane communication state testing circuit connect, and methane communication state testing circuit is that light coupling relay N2B, LED 5, resistance R 22, R26, R37, the R46 of TLP521 connects and composes by model.Two control ends of light coupling relay N2B are connected with communication line with the output terminal of methane signal output apparatus respectively, two output terminals, the one end ground connection of light coupling relay N2B, the other end is connected, also is connected with the RC0 pin of single-chip microcomputer by resistance R 37 with power circuit VB end by resistance R 26.Control end 4 pin of light coupling relay N2B also are connected with the RE0 pin of single-chip microcomputer by resistance R 22.An end ground connection after LED 5 is connected with resistance R 46, the other end is connected with the RB4 end of single-chip microcomputer, and under the output signal control of single-chip microcomputer, LED 5 is undertaken luminous by certain frequency.The signal of methane signal output apparatus output outputs to monitoring station behind methane communication state testing circuit, wherein, LED 5 state to communication under the control of single-chip microcomputer shows, makes on-the-spot staff can understand the communication state of sensor and monitoring station.
The temperature signal output circuit is connected and composed by triode Q4, Q5, Q8, resistance R 6～R8, R20, R39.Temperature communication state testing circuit is that light coupling relay N2A, LED 6, resistance R 21, R27, R38, the R45 of TLP-521 connects and composes by model.Temperature signal output is by the RC2 foot control system of single-chip microcomputer, (20C～60C) is scaled the frequency signal of 200～1000Hz to single-chip microcomputer with detected temperature value, export by the RC2 pin, when RC2 pin output high level, the Q8 conducting, make the current signal of temperature signal output circuit output 5mA, this signal outputs to monitoring station behind temperature communication state testing circuit.
When detecting; this methane, temperature combination sensor can detect the methane concentration in environment temperature and the gas simultaneously; and detected signal shown by each self-corresponding display circuit; and the signal output apparatus of signal by separately can be outputed to monitoring station; when detected methane concentration or temperature overshoot scope; acoustooptic alarm system sends alerting signal, and the power-off signal output circuit is exported power-off signal to monitoring station, the request power-off protection.Because methane detection element also is connected with the buffer circuit that powers on, can effectively protect the methane detection element probe, prolong the serviceable life of detecting element.All be connected with the communication state observation circuit on two signal output apparatus, but the communication state of monitoring sensor and monitoring station and show by the pilot lamp at scene, make on-the-spot staff also can in time understand communication state between sensor and the monitoring station.
Claims (9)
1, a kind of methane, temperature combination sensor have single-chip microcomputer, methane testing circuit, amplifying circuit, methane signal display circuit, methane signal output apparatus, sound light alarming circuit, power-off signal output circuit and power circuit; Described methane testing circuit is connected with amplifying circuit, and described amplifying circuit, methane signal display circuit, methane signal output apparatus, sound light alarming circuit, power-off signal output circuit all are connected with the corresponding port of single-chip microcomputer; It is characterized in that: also have temperature sensing circuit, temperature signal display circuit, temperature signal output circuit, keyboard and remote-control receiving circuit; Described temperature sensing circuit, the temperature signal display circuit, the temperature signal output circuit, keyboard all is connected with the corresponding port of single-chip microcomputer with remote-control receiving circuit.
2, methane according to claim 1, temperature combination sensor is characterized in that: described methane testing circuit also is connected with the detecting element buffer circuit that powers on.
3, methane according to claim 2, temperature combination sensor, it is characterized in that: described detecting element powers on buffer circuit by operational amplifier N3D, and triode Q6, Q7, electrochemical capacitor C6～C8, capacitor C 5 and resistance R 17, R18, R19, R24, R36 connect and compose; Resistance R 17, R19 series connection back one end ground connection, the other end is connected with power circuit, resistance R 17, the junction of R19 is connected with the positive input of operational amplifier N3D, the inverting input of N3D is by resistance R 18 ground connection, the base stage of the output terminal of operational amplifier N3D and triode Q7 is connected with resistance R 24, the emitter of triode Q7 is connected with a signal end of single-chip microcomputer, be connected with resistance R 36 between the base stage of the collector of triode Q7 and triode Q6, the emitter of triode Q6 is connected with power circuit, the collector of triode Q6 is connected with the detecting element probe as output terminal, also is connected with electrochemical capacitor C7 between the emitter of triode Q6 and the base stage; The positive pole of electrochemical capacitor C8, C6 all is connected with the output terminal of the buffer circuit that powers on, and the negative pole of C8 is connected with the inverting input of operational amplifier N3D, the minus earth of C6, and capacitor C 5 is connected in parallel on the C6 two ends; Detecting element is when powering on, and capacitor C 8, C6 slowly rise the voltage of output terminal through repeated charge, reach steady state (SS) at last.
4, methane according to claim 1, temperature combination sensor is characterized in that: described methane signal output apparatus and temperature signal output circuit also are connected with the communication state observation circuit respectively; Described communication state observation circuit is monitored the communications status of communication line in real time, and at the scene communication state is shown by its light emitting diode.
5, methane according to claim 4, temperature combination sensor is characterized in that: described communication state observation circuit includes light coupling relay and light emitting diode; Two control ends of light coupling relay are connected with loaded line with the output terminal of above-mentioned signal output apparatus respectively, one output terminal of light coupling relay is connected with ground, another output terminal is connected with a signal output part of single-chip microcomputer with the VB end of power circuit respectively, light emitting diode is connected with a signal output part of single-chip microcomputer, by the conducting of Single-chip Controlling light emitting diode.
6, methane according to claim 5, temperature combination sensor is characterized in that: described light coupling relay model is TLP521.
7, methane according to claim 1, temperature combination sensor is characterized in that: described temperature sensing circuit has the temperature-sensing element (device) that model is DS18B20.
8, methane according to claim 1, temperature combination sensor is characterized in that: described single-chip microcomputer model is PIC16F877.
9, methane according to claim 1, temperature combination sensor is characterized in that: described remote-control receiving circuit has the receiver of remote-control sytem that model is TL1838A2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022734 CN2884198Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and temp. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022734 CN2884198Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and temp. |
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| CN2884198Y true CN2884198Y (en) | 2007-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620022734 Expired - Fee Related CN2884198Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and temp. |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798416A (en) * | 2012-09-04 | 2012-11-28 | 扬州鑫鸿电子有限公司 | Monitoring system for power environment in machine room |
| CN106290743A (en) * | 2016-10-08 | 2017-01-04 | 安徽理工大学 | A kind of coal mine gas concentration detection and safety early warning device |
-
2006
- 2006-01-24 CN CN 200620022734 patent/CN2884198Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798416A (en) * | 2012-09-04 | 2012-11-28 | 扬州鑫鸿电子有限公司 | Monitoring system for power environment in machine room |
| CN106290743A (en) * | 2016-10-08 | 2017-01-04 | 安徽理工大学 | A kind of coal mine gas concentration detection and safety early warning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20110124 |