CN2884199Y - Composite sensor for methane and carbon monoxide - Google Patents
Composite sensor for methane and carbon monoxide Download PDFInfo
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- CN2884199Y CN2884199Y CN 200620022735 CN200620022735U CN2884199Y CN 2884199 Y CN2884199 Y CN 2884199Y CN 200620022735 CN200620022735 CN 200620022735 CN 200620022735 U CN200620022735 U CN 200620022735U CN 2884199 Y CN2884199 Y CN 2884199Y
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Abstract
The utility model discloses a methane and carbon monoxide combined sensor, comprising a micro control unit, an orderly connected methane detection circuit, an amplifying circuit and an A/D converter, a methane signal display circuit and a methane signal output circuit which are correspondingly connected with the ports of a single-chip microcomputer, an acousto-optic alarm circuit, a power-off signal output circuit, a power supply circuit, an orderly connected carbon monoxide detection circuit, the signal amplification circuit and the A/D converter, an external memory which is connected correspondingly with the ports of the single-chip microcomputer, a carbon monoxide signal display circuit, a carbon monoxide signal output circuit, a keyboard and a remote control receiving circuit. The combined sensor has simple structure and can simultaneously monitor the concentration of methane and carbon monoxide in the environment, 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 the advantages of 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, carbon monoxide 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 need monitoring that environment temperature and other gas concentration are carried out in the general ore deposit, so other sensors etc. just need be set in addition, not only increased power consumption, increase cost, also be 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.And under the situation of outage, need the electrode of Carbon Monoxide Detection element is carried out short-circuit protection; and the electromagnetic relay that adopts at present current ratio in action is bigger; working current is also bigger; the working current of whole sensor is increased; increased power consumption, the transmission range of the signal of sensor also is restricted.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 carbon monoxide.
Further purpose of the present utility model provides a kind of Carbon Monoxide Detection element electrode protective device methane, carbon monoxide combination sensor, that working current is low that is applied to.
Further purpose of the present utility model provides a kind of buffer circuit that powers on methane, carbon monoxide combination sensor, that the voltage on the methane detection element is slowly risen that is applied to.
The utility model also has a purpose to provide a kind of communication state observation circuit methane, carbon monoxide 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, carbon monoxide combination sensor, has single-chip microcomputer, the methane testing circuit, amplifying circuit, the A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit, power-off signal output circuit and power circuit, described methane testing circuit, amplifying circuit and A/D transducer are connected successively, described A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit all is connected with the corresponding port of single-chip microcomputer with the power-off signal output circuit; Its feature is being also to include the Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving circuit; Described Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer connect successively, and described A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving circuit all are connected with the corresponding port of single-chip microcomputer.
The detecting element of described Carbon Monoxide Detection circuit also is connected with electrode protecting device; Described electrode protecting device has a light coupling relay, and the reference utmost point R of Carbon Monoxide Detection element is connected with two output terminals of light coupling relay respectively with work utmost point S, and two control ends of light coupling relay are connected with power circuit; When the detecting element outage quits work, pass through light coupling relay short circuit conducting with reference to utmost point R and work utmost point S.
The detecting element of described methane testing circuit also is connected with the buffer circuit that powers on.
Described detecting element powers on buffer circuit by operational amplifier N2D, and triode Q1, Q2, electrochemical capacitor C4～C6 and resistance R 2～R6 connect and compose; Resistance R 2, R3 series connection back one end ground connection, the other end is connected with the VB end of power circuit, resistance R 2, the junction of R3 is connected with the positive input of operational amplifier N2D, the inverting input of N2D is by resistance R 4 ground connection, the base stage of the output terminal of operational amplifier N2D and triode Q2 is connected with resistance R 5, the emitter of triode Q2 is connected with a signal end of single-chip microcomputer, be connected with resistance R 6 between the base stage of the collector of triode Q2 and triode Q1, the emitter of triode Q1 is connected with the VB of power circuit end, the current collection of triode Q1 very output terminal VE end is connected with the detecting element probe, also is connected with electrochemical capacitor C5 between the emitter of triode Q1 and the base stage; The positive pole of electrochemical capacitor C4, C6 all is connected with the output terminal VE end of the buffer circuit that powers on, and the negative pole of C4 is connected with the inverting input of operational amplifier N2D, the minus earth of C6; Detecting element is when powering on, and capacitor C 4, C6 slowly rise the voltage of output terminal VE end through repeated charge, reach steady state (SS) at last.
Described methane signal output apparatus and carbon monoxide signal output apparatus also are connected with the communication state observation circuit; 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 display circuit.
Described communication state observation circuit includes light coupling relay and light emitting diode thereof; The control end of light coupling relay is connected with loaded line with the output terminal of above-mentioned signal output apparatus respectively, and the output terminal of light coupling relay is connected with light emitting diode with a signal output part of single-chip microcomputer respectively, and light emitting diode is by its conducting of Single-chip Controlling.
Described single-chip microcomputer model is STC89LE52RC.
Described remote-control receiving circuit has the receiver of remote-control sytem that model is TL1838A2.
Described external memory storage is that model is the external memory storage of the band house dog of X5045.
Described A/D transducer model is TLC1549.
Technique scheme of the present utility model has the following advantages compared to existing technology: (1) is with respect to discrete methane transducer and carbon monoxide transducer, this combination sensor is simple in structure, the methane of energy while monitoring of environmental and the concentration of carbon monoxide, 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) electrode protecting device of Carbon Monoxide Detection element adopts miniature light coupling relay to substitute traditional electromagnetic relay; volume is little; the cut-off current of detecting element is little; working current is low; power consumption is little; increase the transmission range of the signal of carbon monoxide transducer, prolonged the serviceable life of Carbon Monoxide Detection element.(4) 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 the content that makes is clearly understood, below also in conjunction with the accompanying drawings according to specific embodiment, to being described in further detail, wherein
Fig. 1 is the utility model theory diagram;
Fig. 2 is the schematic diagram of the power circuit of embodiment;
Fig. 3 is the schematic diagram of the buffer circuit that powers on of the detecting element of embodiment;
Fig. 4 is the methane testing circuit of embodiment and schematic diagram and the Carbon Monoxide Detection circuit and the corresponding amplifying circuit of corresponding amplifying circuit;
Fig. 5 is the schematic diagram of single-chip microcomputer, A/D converter, keyboard, remote-control receiving circuit, external memory storage and the display circuit of embodiment;
Fig. 6 is the sound light alarming circuit of embodiment and the schematic diagram of power-off signal output circuit;
Fig. 7 is the signal output apparatus of embodiment.
Embodiment
See Fig. 1, the methane of present embodiment, the combination sensor of carbon monoxide have single-chip microcomputer, the methane testing circuit, amplifying circuit, the A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit, power-off signal output circuit and power circuit, described methane testing circuit, amplifying circuit and A/D transducer are connected successively, described A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit all is connected with the corresponding port of single-chip microcomputer with the power-off signal output circuit; Also include the Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving circuit; Described Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer connect successively, and described A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving 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, voltage stabilizer N4 and peripheral capacitor C 1～C3, C8, C25, resistance R 1, R31～R35, variable resistor W1, inductance L 1, diode D1, D2, Q3, operational amplifier N3D and the connector J1 that model is 78L05 connect and compose by model, and plug-in unit J1 is connected with outside 18V power supply.Power circuit provides required power supply for each circuit.
See Fig. 3, Fig. 4, the methane testing circuit includes methane detection element and resistance R 9, R11, variable resistor W2, connector J5 and the detecting element buffer circuit that powers on.Wherein, do not draw among the methane detection element figure.Connector J5 is connected with methane detection element, and resistance R 9, R11, W2 and methane detection element are formed bridge circuit.See Fig. 3, detecting element powers on buffer circuit by operational amplifier N2D, and triode Q1, Q2, electrochemical capacitor C4～C6 and resistance R 2～R6 connect and compose; Resistance R 2, R3 series connection back one end ground connection, the other end is connected with the VB end of power circuit, resistance R 2, the junction of R3 is connected with the positive input of operational amplifier N2D, the inverting input of N2D is by resistance R 4 ground connection, the base stage of the output terminal of operational amplifier N2D and triode Q2 is connected with resistance R 5, the emitter of triode Q2 is connected with the signal end P1.1 pin of single-chip microcomputer, be connected with resistance R 6 between the base stage of the collector of triode Q2 and triode Q1, the emitter of triode Q1 is connected with the VB of power circuit end, the current collection of triode Q1 very output terminal VE end is connected with methane detection element, also is connected with electrochemical capacitor C5 between the emitter of triode Q1 and the base stage; The positive pole of electrochemical capacitor C4, C6 all is connected with the output terminal VE end of the buffer circuit that powers on, and the negative pole of C4 is connected with the inverting input of operational amplifier N2D, the minus earth of C6; Detecting element is when powering on, and capacitor C 4, C6 slowly rise the voltage of output terminal VE end through repeated charge, reach steady state (SS) at last.
See Fig. 4, the amplifying circuit that the signal output part of methane testing circuit is corresponding with it connects, and this amplifying circuit is connected and composed by operational amplifier N2A, N2B, N2C and peripheral resistance R 12～R19, R10, R68, variable resistor W3, capacitor C 12.This amplifying circuit amplifies the signal of methane testing circuit output, outputs to corresponding A/D converter N9 then.See Fig. 5, the model of A/D converter N9 is TLC1549.The I/O mouth that signal is outputed to single-chip microcomputer after A/D converter is changed signal carries out data acquisition.
See Fig. 4, the Carbon Monoxide Detection circuit includes Carbon Monoxide Detection element, connector J6 and electrode protecting device N5.Do not draw in the Carbon Monoxide Detection part drawing, connector J6 is connected with the Carbon Monoxide Detection element.What the Carbon Monoxide Detection element adopted is the galvanochemistry sensitive element, electrode protecting device has a light coupling relay N5, the reference utmost point R of Carbon Monoxide Detection element is connected with two output terminals of light coupling relay N5 respectively with work utmost point S, and two control ends of light coupling relay N5 are connected with the input end of voltage stabilizer N4 with the VA end of power circuit respectively; When the detecting element outage quits work, pass through light coupling relay N5 short circuit conducting, realize storage protection with reference to utmost point R and work utmost point S with reference to utmost point R and work utmost point S.
See Fig. 4, the output terminal of the Carbon Monoxide Detection circuit amplifying circuit corresponding with it connects, this amplifying circuit by operational amplifier N3A, N3B, N3C and peripheral resistance R 20～R30, R62, variable resistor W4, W5, thermistor RT, capacitor C 7, C9～C11 thereof, connect and compose.This amplifying circuit amplifies the signal of Carbon Monoxide Detection circuit output, outputs to corresponding A/D converter N10 then.See Fig. 5, the model of A/D converter N10 is TLC1549.The I/O mouth that signal is outputed to single-chip microcomputer after this A/D converter N10 changes signal carries out data acquisition.
See Fig. 5, single-chip microcomputer N11 model is STC89LE52RC.Methane display circuit and carbon monoxide display circuit are that the charactron driver N12 of BC7281A, serial shift register N13, LED display module N14, N15 and peripheral resistance R 38, R39, R41, R42, R46～R53, capacitor C 14, C23, C24, the triode Q5～Q10 that model is 74LS164 connect and compose by model.Display circuit adopts dynamic scan to show,, and is controlled LED display module N14, N15 by charactron driver N12 and serial shift register N13 and finishes demonstration to charactron driver N12 by two I/O mouth P0.0, P0.1 output serial signals of single-chip microcomputer N11.Keyboard comprises switch key S1～S6.Use keyboard to reset, and to zero point, systematic parameters such as enlargement factor, nonlinear compensation coefficient are provided with.Remote-control receiving circuit is that the receiver of remote-control sytem N7 of TL1838A2 and peripheral resistance R 7, R8, capacitor C 17, electrochemical capacitor C18 connect and compose by model.Receiver of remote-control sytem and telepilot are used, and can be provided with systematic parameter.External memory storage N8 is that model is the external memory storage of the band house dog of X5045.
See Fig. 6, sound light alarming circuit is connected and composed by four LED 1～LED4, resistance R 73～R78, triode Q4 and hummer.Light emitting diode and hummer are connected in parallel.The I/O mouth P2.2 of single-chip microcomputer N11 is by the open and close of resistance R 73 and triode Q4 control warning circuit.When detected numerical value surpasses setting, the I/O mouth P2.2 of single-chip microcomputer output high level, the Q4 conducting, light emitting diode is bright, buzzer call.
See Fig. 6, the power-off signal output circuit is connected and composed by triode Q11～Q13, resistance R 56～R60, connector J4.Connector J4 is connected with communication line as output terminal.When the value overshoot scope that sensor arrives, the high flat signal of the P2.5 of single-chip microcomputer N11 end output, control power-off signal output circuit output power-off signal is to monitoring station, and monitoring station cuts off the power supply as the case may be.
See Fig. 7, the methane signal output apparatus is connected and composed by triode Q17～Q19 and resistance R 61, R63～R65.The methane signal output apparatus is by the P0.5 foot control system of single-chip microcomputer N11, single-chip microcomputer N11 is converted into detected methane concentration value (0～4%) frequency signal of 200～1000Hz, export by the P0.5 pin, when P0.5 pin output high level, the Q17 conducting, make the current signal of methane signal output apparatus output 5mA, this signal outputs to monitoring station by the light coupling relay N6 and the connector J2 of methane communication state testing circuit.
See Fig. 7, the output terminal of methane signal output apparatus also connects with corresponding methane communication state testing circuit, and methane communication state testing circuit is that light coupling relay N6, LED 5, resistance R 40, R66, R74, the voltage stabilizing diode Q20 of TLP521-2 connects and composes by model.Wherein, resistance R 66, R74, voltage stabilizing diode Q20 connect to form and detect partly.Resistance R 66, R74 series connection back one end are that triode Q19 collector is connected other end ground connection with the output terminal of methane signal output apparatus; Voltage stabilizing diode Q20 is connected in parallel on the two ends of resistance R 74 and the plus earth of Q20, the junction of resistance R 66, R74 is connected with the P0.4 pin of single-chip microcomputer as the output terminal of this test section, the P2.7 pin of single-chip microcomputer is connected with 7 pin of light coupling relay N6, LED 5 is connected with resistance R 40, the positive pole of LED5 is connected with power circuit VB end, and resistance R 40 is connected with 6 pin of light coupling relay N6.The output terminal of methane signal output apparatus also is connected with 3 pin of light coupling relay N6, and 2 pin of light coupling relay N6 are connected with connector J2 with 4 pin.The signal of methane signal transmission of electricity road 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.
See Fig. 7, the carbon monoxide signal output apparatus is connected and composed by triode Q14～Q16, resistance R 67, R69～R71.The P0.3 foot control system of carbon monoxide signal transmission of electricity route single-chip microcomputer, (0～1000ppm) is converted into the frequency signal of 200～1000Hz to single-chip microcomputer with detected carbonomonoxide concentration value, export by the P0.3 pin, when P0.3 pin output high level, the Q14 conducting, make the current signal of carbon monoxide signal output apparatus output 5mA, this signal outputs to monitoring station by the light coupling relay N6 and the connector J2 of carbon monoxide communication state testing circuit.
See Fig. 7, the output terminal of carbon monoxide signal output apparatus and corresponding carbon monoxide communication state testing circuit connect, and carbon monoxide communication state testing circuit is that light coupling relay N6, LED 6, resistance R 79, R72, R73, the voltage stabilizing diode Q21 of TLP521-2 connects and composes by model.Wherein, resistance R 72, R73, voltage stabilizing diode Q21 connect to form and detect partly.Resistance R 72, R73 series connection back one end are connected other end ground connection with the output terminal of carbon monoxide signal output apparatus; Voltage stabilizing diode Q21 is connected in parallel on the two ends of resistance R 73 and the plus earth of Q21, the junction of resistance R 72, R73 is connected with the P0.6 pin of single-chip microcomputer as the output terminal of this test section, the P0.7 pin of single-chip microcomputer is connected with 5 pin of light coupling relay N6, LED 6 is connected with resistance R 79, the positive pole of LED6 is connected with power circuit VB end, and resistance R 79 is connected with 8 pin of light coupling relay N6.The output terminal of carbon monoxide signal output apparatus also is connected with 1 pin of light coupling relay N6, and 2 pin of light coupling relay N6 are connected with connector J2 with 4 pin.The signal of carbon monoxide signal transmission of electricity road output outputs to monitoring station behind carbon monoxide communication state testing circuit, wherein, LED 6 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.
When detecting; this methane, carbon monoxide combination sensor can detect methane in the environment and carbonomonoxide concentration 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 carbonomonoxide concentration 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.In addition, because the Carbon Monoxide Detection element also is connected with electrode protecting device, when the detecting element outage quits work, can store protection to the electrode of Carbon Monoxide Detection 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 understand the communication state of sensor and monitoring station.
Claims (10)
1, a kind of methane, carbon monoxide combination sensor, has single-chip microcomputer, the methane testing circuit, amplifying circuit, the A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit, power-off signal output circuit and power circuit, described methane testing circuit, amplifying circuit and A/D transducer are connected successively, described A/D transducer, the methane signal display circuit, the methane signal output apparatus, sound light alarming circuit all is connected with the corresponding port of single-chip microcomputer with the power-off signal output circuit; It is characterized in that: also include the Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving circuit; Described Carbon Monoxide Detection circuit, signal amplification circuit, A/D transducer connect successively, and described A/D transducer, external memory storage, carbon monoxide signal display circuit, carbon monoxide signal output apparatus, keyboard and remote-control receiving circuit all are connected with the corresponding port of single-chip microcomputer.
2, methane according to claim 1, carbon monoxide combination sensor, it is characterized in that: the detecting element of described Carbon Monoxide Detection circuit also is connected with electrode protecting device; Described electrode protecting device has a light coupling relay, and the reference utmost point R of Carbon Monoxide Detection element is connected with two output terminals of light coupling relay respectively with work utmost point S, and two control ends of light coupling relay are connected with power circuit; When the detecting element outage quits work, pass through light coupling relay short circuit conducting with reference to utmost point R and work utmost point S.
3, methane according to claim 1, carbon monoxide combination sensor, it is characterized in that: the detecting element of described methane testing circuit also is connected with the buffer circuit that powers on.
4, methane according to claim 2, carbon monoxide combination sensor is characterized in that: described detecting element powers on buffer circuit by operational amplifier N2D, and triode Q1, Q2, electrochemical capacitor C4～C6 and resistance R 2～R6 connect and compose; Resistance R 2, R3 series connection back one end ground connection, the other end is connected with the VB end of power circuit, resistance R 2, the junction of R3 is connected with the positive input of operational amplifier N2D, the inverting input of N2D is by resistance R 4 ground connection, the base stage of the output terminal of operational amplifier N2D and triode Q2 is connected with resistance R 5, the emitter of triode Q2 is connected with a signal end of single-chip microcomputer, be connected with resistance R 6 between the base stage of the collector of triode Q2 and triode Q1, the emitter of triode Q1 is connected with the VB of power circuit end, the current collection of triode Q1 very output terminal VE end is connected with the detecting element probe, also is connected with electrochemical capacitor C5 between the emitter of triode Q1 and the base stage; The positive pole of electrochemical capacitor C4, C6 all is connected with the output terminal VE end of the buffer circuit that powers on, and the negative pole of C4 is connected with the inverting input of operational amplifier N2D, the minus earth of C6; Detecting element is when powering on, and capacitor C 4, C6 slowly rise the voltage of output terminal VE end through repeated charge, reach steady state (SS) at last.
5, methane according to claim 1, carbon monoxide combination sensor is characterized in that: described methane signal output apparatus and carbon monoxide signal output apparatus 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 display circuit.
6, methane according to claim 5, carbon monoxide combination sensor is characterized in that: described communication state observation circuit includes light coupling relay and light emitting diode thereof; The control end of light coupling relay is connected with loaded line with the output terminal of above-mentioned signal output apparatus respectively, and the output terminal of light coupling relay is connected with light emitting diode with a signal output part of single-chip microcomputer respectively, and light emitting diode is by its conducting of Single-chip Controlling.
7, methane according to claim 1, carbon monoxide combination sensor is characterized in that: described single-chip microcomputer model is STC89LE52RC.
8, methane according to claim 1, carbon monoxide combination sensor is characterized in that: described remote-control receiving circuit has the receiver of remote-control sytem that model is TL1838A2.
9, methane according to claim 1, carbon monoxide combination sensor is characterized in that: described external memory storage is that model is the external memory storage of the band house dog of X5045.
10, methane according to claim 1, carbon monoxide combination sensor is characterized in that: described A/D transducer model is TLC1549.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022735 CN2884199Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and carbon monoxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022735 CN2884199Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and carbon monoxide |
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| CN2884199Y true CN2884199Y (en) | 2007-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620022735 Expired - Fee Related CN2884199Y (en) | 2006-01-24 | 2006-01-24 | Composite sensor for methane and carbon monoxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788547A (en) * | 2010-03-03 | 2010-07-28 | 北京鑫源九鼎科技有限公司 | Methane sensor with bidirectional data transmission function |
| CN102722964A (en) * | 2012-06-29 | 2012-10-10 | 孙新凯 | Vehicle-mounted carbon monoxide detection alarm device |
| CN107449859A (en) * | 2017-07-27 | 2017-12-08 | 许文远 | A kind of coal gas automated security monitor device |
-
2006
- 2006-01-24 CN CN 200620022735 patent/CN2884199Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788547A (en) * | 2010-03-03 | 2010-07-28 | 北京鑫源九鼎科技有限公司 | Methane sensor with bidirectional data transmission function |
| CN102722964A (en) * | 2012-06-29 | 2012-10-10 | 孙新凯 | Vehicle-mounted carbon monoxide detection alarm device |
| CN107449859A (en) * | 2017-07-27 | 2017-12-08 | 许文远 | A kind of coal gas automated security monitor device |
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| 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 |