CN205786448U - A kind of safety intelligent type combustible gas probe - Google Patents
A kind of safety intelligent type combustible gas probe Download PDFInfo
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- CN205786448U CN205786448U CN201620451688.XU CN201620451688U CN205786448U CN 205786448 U CN205786448 U CN 205786448U CN 201620451688 U CN201620451688 U CN 201620451688U CN 205786448 U CN205786448 U CN 205786448U
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- detection sensor
- power supply
- potential source
- combustible gas
- potentiometer
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Abstract
nullThe utility model discloses a kind of safety intelligent type combustible gas probe，It includes housing、Circuit board、Plug、Blocking、Detection sensor，The front-end and back-end of described circuit board are respectively equipped with front end circuit plate protection cap and back-end circuit plate protection cap，Circuit board is provided with microprocessor、Signal processor、Bridge potential source、Regulated power supply、Liquid crystal display、Alarm and RF transceiver，The power output end of regulated power supply and the feeder ear of microprocessor、The feeder ear of bridge potential source、The benchmark source of signal processor connects，The driving voltage outfan of described bridge potential source is connected with the driving voltage input of described detection sensor，The signal output part of detection sensor is connected with microprocessor via signal processor，Detection sensor is arranged in metal sintering cover，Metal sintering cover outer wrap hydrophobicity heat-preservation cotton，The inlet end surface of detection sensor is provided with hydrophobic ventilated membrane.This utility model has Micro Energy Lose, and precision is high, explosion-proof antifreeze feature.
Description
Technical field
This utility model relates to a kind of detector, is specifically related to a kind of safety intelligent type combustible gas probe.
Background technology
Along with the development of society, such as the clean energy resource of natural gas, liquefied petroleum gas and artificial coal gas etc is gradually widely used.These fuel gas bring great convenience to people's life, but consequently also create a problem, i.e. when the combustable gas concentration of leakage reaches to a certain degree, are easily generated blast, and life and property to people bring the biggest threat.The detection of fuel gas is requisite, especially at some industrial sites, is badly in need of installing combustible gas detecting devices, plays pre-alarm and prevention effect.
Currently, various in style, the Various Functions of combustible gas probe, the particularly detector with catalytic combustion type sensor as representative shows highly sensitive, good linearity, stable performance, the plurality of advantages of life-span length, thus, the most mostly use catalytic combustion type sensor to realize the monitoring to fuel gas.Existing all types of combustible gas probe can realize the real-time monitoring to fuel gas, but their power consumption is the biggest, being about about 2.4W to 3W through actual measurement, combustible gas probe their power consumption no exception using catalytic combustion type sensor is the biggest.In addition, test circuit many employings resistance bridge measuring circuit of catalytic combustion type sensor, the signal that this circuit takes out is Vs=Vcc*Rs/ (Rs+RO), wherein Rs is sensitive end resistance, R0 is contrast end resistance, it is seen then that output signal and extraneous input signal are substantially in non-linear relation, the most bad, the especially sensor of low-voltage power supply.Be exactly finally current detector in intellectuality, explosion-proof antifreeze wait convenient the most still Shortcomings, more improvement need to be made.
Utility model content
For the deficiency overcoming prior art to exist, this utility model provides a kind of safety intelligent type combustible gas probe.
nullThis utility model adopts the technical scheme that: a kind of safety intelligent type combustible gas probe，It includes housing、It is positioned at the circuit board of described enclosure interior、It is positioned at plug and the blocking at described housing two ends、It is positioned at the detection sensor below described housing，The front-end and back-end of described circuit board are respectively equipped with front end circuit plate protection cap and back-end circuit plate protection cap，Circuit board is provided with microprocessor、Signal processor、Bridge potential source、Regulated power supply、Liquid crystal display、Alarm and RF transceiver，The power output end of described regulated power supply and the feeder ear of microprocessor、The feeder ear of bridge potential source、The benchmark source of signal processor connects，The driving voltage outfan of described bridge potential source is connected with the driving voltage input of described detection sensor，The signal output part of detection sensor is connected with the corresponding I/O end of microprocessor via signal processor，Detection sensor is arranged in metal sintering cover，Metal sintering cover outer wrap hydrophobicity heat-preservation cotton，The inlet end surface of detection sensor is provided with hydrophobic ventilated membrane；Described signal processor includes operational amplifier Q, potentiometer W and resistance R, described potentiometer W and detection sensor series, it is connected between regulated power supply end and signal output part, the series circuit that described resistance R and potentiometer W and detection sensor are constituted is in parallel, its outfan is connected with described signal output part, the positive pole of described operational amplifier Q is connected with potentiometer, and negative pole is connected to detect between the sensitive end of sensor and contrast end, to follow the tracks of the change in voltage of potentiometer W tap terminals.
Described microprocessor is the single-chip microcomputer of Micro Energy Lose；Described detection sensor is catalytic combustion type sensor；Described bridge potential source is Micro Energy Lose constant pressure type bridge potential source；Described regulated power supply is Micro Energy Lose linear LEO type regulated power supply.
The contrast end ground connection of described sensor, the sensitive end of described sensor is connected with signal output part, a termination power of described resistance R, and the other end is connected with signal output part, and described potentiometer one terminates regulated power supply, other end ground connection.
Explosion-proof packing ring and seal washer it is provided with between described plug and housing.
Described housing is explosion-proof type housing.
Described detector also includes RS485 transceiver.
The beneficial effects of the utility model are:
(1) not only can realize the monitoring function real-time to combustable gas concentration, it also has the feature of Micro Energy Lose, and power consumption is less than 0.5W, reduces about 80% than existing detector, green energy conservation.
(2) shortcoming overcoming sensing element electric bridge pickoff signals institute unintentional nonlinearity, makes input voltage and output voltage the most linear so that result of detection is more stable and accurately.
(3) gas concentration information can not only be converted to measurable voltage and current signal. the data/address bus that also induces one realizes the Centralized Monitoring of relatively multinode.It uses intelligent scaling method.Not only make gas concentration be mapped veritably with AD sampled signal, and on the basis of not increasing hardware cost, solve the problem that the output accuracy that and ambient parameter change (such as drift and temperature drift) aging by sensor performance etc. cause reduces.
(4) explosion-proof, resistance to frost is more preferable.After installing anti-frost protection structure additional, it is ensured that detector gas passage in low temperature and high relative humidity environment is unobstructed, does not freezes, not condensation, normal monitoring gas leakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is circuit block diagram of the present utility model.
Fig. 3 is signal processing circuit principle schematic.
Fig. 4 is the circuit theory schematic diagram of bridge potential source.
Fig. 5 is the circuit theory schematic diagram of regulated power supply.
In figure: 1-housing, 2-circuit board, 3-back-end circuit plate protection cap, 4-front end circuit plate protection cap, 5-plug; 6-blocks, the explosion-proof packing ring of 7-, 8-seal washer, and 9-detects sensor, 91-sensitivity end; 92-contrasts end, 10-metal sintering cover, 11-hydrophobicity heat-preservation cotton, 12-hydrophobic ventilated membrane.
Detailed description of the invention
With specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
nullAs shown in Figure 1，A kind of safety intelligent type combustible gas probe，It includes housing 1、It is positioned at the circuit board 2 within described housing 1、It is positioned at plug 5 and the blocking 6 at described housing 1 two ends、It is positioned at the detection sensor 9 below described housing 1，The front-end and back-end of described circuit board 2 are respectively equipped with front end circuit plate protection cap 3 and back-end circuit plate protection cap 4，Circuit board 2 is provided with microprocessor、Signal processor、Bridge potential source、Regulated power supply、Liquid crystal display、Alarm and RF transceiver，The power output end of described regulated power supply and the feeder ear of microprocessor、The feeder ear of bridge potential source、The benchmark source of signal processor connects，The driving voltage outfan of described bridge potential source is connected with the driving voltage input of described detection sensor 9，The signal output part of detection sensor 9 is connected with the corresponding I/O end of microprocessor via signal processor，Detection sensor 9 is arranged in metal sintering cover 10，Metal sintering cover 10 outer wrap hydrophobicity heat-preservation cotton 11，The inlet end surface of detection sensor 9 is provided with hydrophobic ventilated membrane 12；Described signal processor includes operational amplifier Q, potentiometer W and resistance R, described potentiometer W and detection sensor 9 are connected, it is connected between regulated power supply end and signal output part OUT, the series circuit that described resistance R and potentiometer W and detection sensor 9 are constituted is in parallel, its outfan is connected with described signal output part, the positive pole of described operational amplifier Q is connected with potentiometer W, negative pole is connected to detect between the sensitive end 91 of sensor 9 and contrast end 92, to follow the tracks of the change in voltage of potentiometer W tap terminals.
Potentiometer W of the present utility model and detection sensor series, when detecting the sensitive end resistance variations of sensor, the voltage of potentiometer W changes, operational amplifier Q follow the tracks of the voltage of potentiometer W tap terminals, at signal output part OUT output voltage.The signal that this circuit takes out is: Vout=Vs(1+Rs/R0), it is seen that output voltage is the most linear with Rs；Wherein, Rs is sensitive end resistance, and R0 is contrast end resistance, and Vs is the voltage of potentiometer taper end, and Vout is output.
In this utility model, bridge potential source selects Micro Energy Lose constant pressure type bridge potential source.Constant pressure type bridge potential source it include low-power consumption dc-dc IC3, its function is to provide stable driving voltage, the constant power output of essentially 425mW for detection sensor.As externally fed device input 9V, constant pressure type bridge potential source output 425.081mW, as externally fed device input 36V, constant pressure type bridge potential source output 428.24mW, say, that in the case of input voltage changes, constant pressure type bridge potential source always can provide 425mW firm power for detection sensor, himself only consumes about 3.16mW, and power consumption is the lowest, solves the problem that detector power consumption increases with the input voltage increase applied.And detect sensor and selected catalytic combustion type sensor, its power consumption is 425mW, accounts for about the 88% of whole detector power consumption.
In this utility model, it is preferred that described microprocessor is the single-chip microcomputer of Micro Energy Lose；Described detection sensor is catalytic combustion type sensor；Described bridge potential source is Micro Energy Lose constant pressure type bridge potential source；Described regulated power supply is Micro Energy Lose linear LEO type regulated power supply.The contrast end ground connection of described detection sensor, the sensitive end of described sensor is connected with signal output part, a termination power of described resistance R, and the other end is connected with signal output part, and described potentiometer one terminates regulated power supply, other end ground connection.Explosion-proof packing ring and seal washer it is provided with between described plug and housing.Described housing is explosion-proof type housing.
Of the present utility model ultimate principle, principal character and advantage have more than been shown and described.Those of ordinary skill in the art's technical scheme that mode obtained it should be appreciated that above-described embodiment limits protection domain of the present utility model the most in any form, all employing equivalents etc., all falls within protection domain of the present utility model.
This utility model is not directed to part and the most same as the prior art prior art maybe can be used to be realized.
Claims (6)
- null1. a safety intelligent type combustible gas probe，It is characterized in that: include housing、It is positioned at the circuit board of described enclosure interior、It is positioned at plug and the blocking at described housing two ends、It is positioned at the detection sensor below described housing，The front-end and back-end of described circuit board are respectively equipped with front end circuit plate protection cap and back-end circuit plate protection cap，Circuit board is provided with microprocessor、Signal processor、Bridge potential source、Regulated power supply、Liquid crystal display、Alarm and RF transceiver，The power output end of described regulated power supply and the feeder ear of microprocessor、The feeder ear of bridge potential source、The benchmark source of signal processor connects，The driving voltage outfan of described bridge potential source is connected with the driving voltage input of described detection sensor，The signal output part of detection sensor is connected with the corresponding I/O end of microprocessor via signal processor，Detection sensor is arranged in metal sintering cover，Metal sintering cover outer wrap hydrophobicity heat-preservation cotton，The inlet end surface of detection sensor is provided with hydrophobic ventilated membrane；Described signal processor includes operational amplifier Q, potentiometer W and resistance R, described potentiometer W and detection sensor series, it is connected between regulated power supply end and signal output part, the series circuit that described resistance R and potentiometer W and detection sensor are constituted is in parallel, its outfan is connected with described signal output part, the positive pole of described operational amplifier Q is connected with potentiometer, and negative pole is connected to detect between the sensitive end of sensor and contrast end, to follow the tracks of the change in voltage of potentiometer W tap terminals.
- Safety intelligent type combustible gas probe the most according to claim 1, it is characterised in that: described microprocessor is the single-chip microcomputer of Micro Energy Lose；Described detection sensor is catalytic combustion type sensor；Described bridge potential source is Micro Energy Lose constant pressure type bridge potential source；Described regulated power supply is Micro Energy Lose linear LEO type regulated power supply.
- Safety intelligent type combustible gas probe the most according to claim 1, it is characterized in that: the contrast end ground connection of described sensor, the sensitive end of described sensor is connected with signal output part, one termination power of described resistance R, the other end is connected with signal output part, described potentiometer one terminates regulated power supply, other end ground connection.
- Safety intelligent type combustible gas probe the most according to claim 1, it is characterised in that: it is provided with explosion-proof packing ring and seal washer between described plug and housing.
- Safety intelligent type combustible gas probe the most according to claim 1, it is characterised in that: described housing is explosion-proof type housing.
- Safety intelligent type combustible gas probe the most according to claim 1, it is characterised in that: this detector also includes RS485 transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620451688.XU CN205786448U (en) | 2016-05-18 | 2016-05-18 | A kind of safety intelligent type combustible gas probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620451688.XU CN205786448U (en) | 2016-05-18 | 2016-05-18 | A kind of safety intelligent type combustible gas probe |
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| Publication Number | Publication Date |
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| CN205786448U true CN205786448U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620451688.XU Expired - Fee Related CN205786448U (en) | 2016-05-18 | 2016-05-18 | A kind of safety intelligent type combustible gas probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730535A (en) * | 2020-12-08 | 2021-04-30 | 江苏锐科芯科技有限公司 | Gas detection method based on array gas sensor and gas sensor |
-
2016
- 2016-05-18 CN CN201620451688.XU patent/CN205786448U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730535A (en) * | 2020-12-08 | 2021-04-30 | 江苏锐科芯科技有限公司 | Gas detection method based on array gas sensor and gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170518 |