CN109991186A - A kind of portable intelligent combustible gas probe - Google Patents
A kind of portable intelligent combustible gas probe Download PDFInfo
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- CN109991186A CN109991186A CN201910184441.4A CN201910184441A CN109991186A CN 109991186 A CN109991186 A CN 109991186A CN 201910184441 A CN201910184441 A CN 201910184441A CN 109991186 A CN109991186 A CN 109991186A
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- 230000003287 optical effect Effects 0.000 claims description 14
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- 238000013461 design Methods 0.000 abstract description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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Abstract
The invention belongs to sensor technical field, in particular to a kind of portable intelligent combustible gas probe, including shell, key, display screen, buzzer, USB interface, stomata, alarm lamp, antenna, back splint, battery；The two sidewalls of shell are provided with stomata, and front is provided with display screen, key, back side back splint and power supply lid, and top is provided with antenna, and bottom faces are provided with the USB interface, have buzzer and alarm lamp in side wall setting.The present invention uses the two pass bands technology of NDIR infrared sensing, improves the measurement accuracy to fuel gas；It is also controlled by the intelligent wireless single-chip microcontroller based on 6LoWPAN agreement of low-power consumption, intelligent wireless combustible gas detecting net can be set up, realize wireless communication, intelligent monitoring and linkage；By portable design and back splint, it is convenient for carrying and fixes；Speed of detection is also finally accelerated by control fan, improves detection safety.
Description
Technical field
The invention belongs to sensor technical field, in particular to a kind of portable intelligent combustible gas probe.
Background technique
In combustible gas probe, it is its core component that fuel gas, which detects sensing device, and the heart can feel detection
The reliability of device.Common fuel gas sensing can substantially be divided into semiconductor gas sensor, catalytic combustion type gas sensing
Device, electrochemical sensor and optical sensor.Semiconductor gas sensor is at low cost, response is fast, the service life is long, circuit is simple,
But must work at high temperature, parameters spread poor to tested gas-selectively is easy the disadvantages of being poisoned to sulfide.Catalysis
Combustion type gas sensor stability is high, circuit design is simple, but the service life is short, and catalyst is easy poisoning, and there are dangerous
Property and unstability, are not easy to routine use.Electrochemical gas sensor has high selectivity and resolution ratio, but its electrolyte
It is easy to dry up and causes sensor failure, safety is not high.In recent years the infrared gas sensor of broad development be widely deployed and
Using.
Infrared gas sensor is strong with selectivity, high sensitivity, does not damage under test gas, does not heat, long service life,
It is a kind of safe, lossless, efficient gas detection technology.But the disadvantages of it is high that there is also costs of manufacture, and anti-interference ability is weak.This hair
The bright NDIR infrared sensor by electrical modulation, using dual-wavelength measurement technology, by comparing measuring signal and reference signal
Difference eliminates the interference of environmental factor, greatly eliminates detection caused by fixed, null offset of photoelectric device of flashing etc.
Device measurement error.
The product form of combustible gas probe can be divided into point-type, stand alone type, portable and line style, wherein it is portable be can
With the seed type for independently using and being convenient for carrying, application environment is more relaxed, can access fire alarming and controlling network, forms system
Unite networking and be convenient for Centralized Monitoring.
And the development of modern Internet of Things, further speed up the development of automatic fire detection-alarm and monitoring system.Now
Develop internet of things sensors network technology the swiftest and the most violent, is exactly wireless sensor technology, and based on the wireless of 6LoWPAN agreement
Technology of Internet of things is the technology in forward position the most.6LoWPAN(IPv6 over LoWPAN) defined with IEEE802.15.4 standard
Based on physical layer and MAC layer, network layer, application layer and link layer are defined again, be exactly in fact
IPv6 technology is used under IEEE802.15.4 standard.6LoWPAN agreement can provide the address space of magnanimity, also can be conveniently a large amount of
Radio-based electronic devices access internet；The network architecture based on IPv6 technology is easily developed；Universality is strong, applies and is wirelessly passing
It is easier to be received in sensor network protocol.
Summary of the invention
The present invention is exactly based on combustible gas sensor and is combined based on 6LoWPAN agreement wireless internet of things technology,
Completely new solution is provided for creating an automatic detection network of wireless fuel gas.
The embodiment of the invention provides a kind of portable intelligent combustible gas probes, and the technical solution is as follows:
A kind of portable intelligent combustible gas probe, including shell, key, display screen, buzzer, USB interface, stomata, report
Warning lamp, antenna, back splint, power supply lid, the two sidewalls of the shell through the shell are provided with stomata, and the shell is set on one side
It is equipped with the display screen and the key, the shell is provided with the back splint and power supply lid on one side, and the shell one side is arranged
There is the antenna, the shell is provided with the USB interface on one side, has buzzer in the face side wall setting of the shell, institute
It states shell and is provided with the alarm lamp on the surface of the antenna；The enclosure interior is provided with sensor, fan, miniature
Motor and pcb board, the sensor include that infrared light supply, diaphragm, gas chamber, reference optical filter, measurement optical filter, binary channels are red
Outer receiver and deflecting mirror, the pcb board are fixed on the enclosure interior, and the shell of the gas chamber is that multiple apertures are arranged not
Become rusty steel cylinder clamp mechanism, is cased with ventilative dust-proof, water-proof cover on the gas chamber shell.
Further, the sensor is arranged in the sensor outer housing, and the sensor outer housing is fixed on the shell
In vivo, the pipeline of connection stomata is provided in the two side walls of the sensor outer housing, the fan and the micro motor are solid
It is scheduled in the pipeline of the stomata.
Further, microcontroller, LCD display module, light source driver module, signal tune have been electrically connected on the pcb board
Manage module, A/D conversion module, data processing module, motor driving chip, the USB interface, 4G module, GPS module, alarm
Circuit and power supply.
Further, the LCD display module, the key, the light source driver module, the signal conditioning module,
It is the A/D conversion module, the data processing module, the motor driving chip, the USB interface, the 4G module, described
GPS module, the warning circuit couple with the micro-controller communications respectively, and the power supply is electrically connected with the microcontroller,
The LCD display module electrically connects the display screen circuit, and the motor driving chip communicates connection with the micro motor.
Specifically, the microcontroller be integrated with rf receiver and transmitter based on 6LoWPAN agreement, MCU kernel,
The integration system chip of Flash ROM and RAM.
Further, the infrared light supply electrically connects on the light source driver module on the pcb board, and the binary channels is red
Outer receiver electrically connects in the signal conditioning module on the pcb board.
Specifically, the infrared light supply is the NDIR infrared sensor excitation light source using electrical modulation, and working condition is arteries and veins
Rush state；The infrared light supply can cover the spectral band of C-H structure in tested gas.
Preferably, the rubber stopper of the corrosion of gas-tight body or dust entrance is provided with outside the USB interface.
Preferably, the antenna telescopic antenna, the antenna couple with the micro-controller communications.
Technical solution provided in an embodiment of the present invention has the benefit that
1, it is controlled using the intelligent wireless single-chip microcontroller based on 6LoWPAN agreement of low-power consumption, it is flammable intelligent wireless can be set up
Detection of gas net expands to the investigative range of entire scene or building, adaptable, easy exploiting, with possessing magnanimity IPv6
Location, without particular gateway access IPv4/IPv6 network, Yi Liyong IP network technology developed.
2, using the NDIR infrared sensor of electrical modulation, using dual-wavelength measurement technology, by comparing measuring signal and ginseng
Than the difference of signal, the interference of environmental factor is eliminated, fixed, null offset of photoelectric device of flashing etc. is greatly eliminated and draws
The detector measurement error risen.
3, by portable design and back splint, it can fix anywhere at any time, be convenient for carrying, supplied using reserve battery
Electricity, due to the Intelligent internet of things using 6LoWPAN agreement, low in energy consumption, cruising ability is strong.
4, the detector is also opened by the fan that intelligent control chip controls air pipe inlet, accelerates the suction of tested gas
Enter, improves the recognition speed of sensor and the safety of detection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of portable intelligent combustible gas probe provided in an embodiment of the present invention；
Fig. 2 is the lateral view of Fig. 1；
Fig. 3 is the internal sensor structural schematic diagram of portable intelligent combustible gas probe provided in an embodiment of the present invention；
Fig. 4 is the control principle drawing of portable intelligent combustible gas probe provided in an embodiment of the present invention；
In figure: 1 shell, 10 keys, 11 infrared light supplies, 12 diaphragms, 13 gas chambers, 14 fans, 15 micro motors, 16 references filter
Piece, 17 measurement optical filters, 18 binary channels infrared remote receivers, 19 pcb boards, 2 display screens, 20 deflecting mirrors, 3 buzzers, 4 USB connect
Mouth, 5 stomatas, 50 filter bowls, 6 alarm lamps, 7 antennas, 8 back splints, 9 power supply lids
In the present invention unless specifically defined or limited otherwise, term " setting " term shall be understood in a broad sense, and can be fixed
Connection can detachably be coupled, or integral；" connection " is to be connected directly integrally, and " connection " is detachable connection,
" fixation " is quiet connection；It unless otherwise restricted clearly, for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of portable intelligent combustible gas probe, including shell 1, key 10, display screen
2, buzzer 3, USB interface 4, stomata 5, alarm lamp 6, antenna 7, back splint 8, power supply lid 9, shell 1 through the shell 1 two
Side wall is provided with stomata 5, and shell 1 is provided with display screen 2 and key 10 on one side, and shell 1 is provided with back splint 8 and power supply lid 9 on one side,
Shell 1 is provided with antenna 7 on one side, and shell 1 is provided with USB interface 4 on one side, has buzzer 3 in the face side wall setting of shell 1,
Shell 1 is provided with the alarm lamp 6 on the surface of the antenna 7；Shell 1 is internally provided with sensor, fan 14, miniature
Motor 15 and pcb board 19, sensor include infrared light supply 11, diaphragm 12, gas chamber 13, reference optical filter 16, measurement optical filter
17, binary channels infrared remote receiver 18 and deflecting mirror 20, pcb board 19 are fixed on inside shell 1, and the shell of gas chamber 13 is that setting is multiple
The stainless steel cylinder clamp mechanism of aperture is cased with ventilative dust-proof, water-proof cover on 13 shell of gas chamber.
Referring to Fig. 1, Fig. 2, Fig. 3, sensor is arranged in sensor outer housing 110, and sensor outer housing 110 is fixed on shell 1
It is interior, the pipeline of connection stomata 5 is provided in the two side walls of sensor outer housing 110, fan 14 and micro motor 15 are fixed on gas
In the pipeline in hole 5.
Further, microcontroller, LCD display module, light source driver module, signal condition mould have been electrically connected on pcb board
Block, A/D conversion module, data processing module, motor driving chip, the USB interface, 4G module, GPS module, warning circuit
And power supply；LCD display module, key, light source driver module, signal conditioning module, A/D conversion module, data processing module, horse
Up to driving chip, USB interface, 4G module, warning circuit difference micro-controller communications connection, LCD display module electrically connects display
Shield circuit, motor driving chip is electrically connected with micro motor 15, and buzzer 3 and alarm lamp 6 have been electrically connected on warning circuit.
Further, display screen circuit can show that power supply status, malfunction, time, warning message, alarm lamp pass through
Different colours and flashing times distinguish normal, failure and alarm condition, and buzzer 3 can issue alarm the tinkle of bells and voice broadcast letter
Breath.Function selection, the setting of parameter and time setting simply are carried out to system function module by bond energy.
Specifically, micro motor is micro stepping motor, realizes Digital Control micro motor by motor driving chip
Switch and revolving speed, and then control fan rotation.It is small that micro motor can choose outer dimension, if size is Φ
15*11；TMC family chip may be selected in motor driving chip.It is possible to further add shape CPU temperature measurement circuit, horse on single-chip microcontroller
PWM(Pulse Width Modulation, pulse-width modulation circuit are used up to driving chip) chip is controlled, temperature measurement circuit measures,
The pwm pulse signal of different duty is issued, the square-wave pulse of level-one and PWM electrically connect in the triode of fan, pass through control
The turn-on time length of triode in one cycle is realized to the control of the revolving speed of fan, and then lowers the temperature of singlechip CPU
Degree, while also can be reduced influence of the high temperature to the detection result of infrared sensor.
Specifically, microcontroller is to be integrated with rf receiver and transmitter, MCU kernel, Flash based on 6LoWPAN agreement
The integration system chip of ROM and RAM, 6LoWPAN protocol integration chip, which such as may be selected, ADI Linear SmartMesh IP system
Column product, Avior module or IDT ZWIR4532 module.
Further, infrared light supply 11 electrically connects on the light source driver module on pcb board, binary channels infrared remote receiver 18
It electrically connects in the signal conditioning module on pcb board.
Specifically, infrared light supply 11 is the NDIR infrared sensor excitation light source using electrical modulation, and working condition is pulse
State；The infrared light supply can cover the spectral band of C-H structure in tested gas.Infrared light supply 11 can choose
IR715EN type, IR715-PR type, IR715 or IR6833EN type.
Specifically, the central wavelength of the measurement optical filter in binary channels infrared remote receiver is 3.27 μm of ± 50nm, half-band width
For 125nm ± 25nm；The central wavelength of reference optical filter is that 4.05 μm of ± 30nm half-band width are 85nm ± 15nm.
Preferably, the rubber stopper of the corrosion of gas-tight body or dust entrance is provided with outside USB interface 4.
Preferably, 7 telescopic antenna of antenna, antenna 7 couple with micro-controller communications.
Preferably, pcb board and cell apparatus can carry out technological processing for explosion protection feature.Compartment is such as set in shell, by pcb board and
Battery is separated with other spaces in shell.
Preferably, the power circuit of inside of the invention uses intrinsicallysafecircuit, and security level is ic rank or more,
Cause tested gas burning or explosion with the electric spark or fuel factor that prevent equipment itself from generating.
Referring to Fig. 3, infrared light supply, gas chamber, binary channels infrared remote receiver are arranged in same optical axis, and infrared light supply passes through throwing
Face mirror launches directional light, through diaphragm, is converged on binary channels infrared remote receiver after plane mirror reflects, passes through reflection
Optical path length can be extended on the basis of without reflecting mirror 1 times, enhance detection signal, while it is total not increase detector by mirror
It is long.
Referring to fig. 4, specifically, power supply 9 includes main power source, backup power source and power supply switching module, main power source and spare
Signal is connected in power supply switching module to power supply respectively, and electro-hydraulic switching module communication connection microcontroller, backup power source is chargeable electricity
Pond.When the wired connection of present device, the present invention is by the wired connection of USB interface, and microcontroller controls power supply and switches mould
Equipment is switched on main power source by block, and is charged simultaneously for backup power source, while microcontroller control LCD display display charging
State and charge capacity, and control the color that alarm lamp shows rechargeable lamp；When present device is in wireless status, microcontroller
Device control power transfer device switches to backup power source as equipment power supply, and shows equipment remaining capacity on the lcd screen.
Referring to fig. 4, specifically, due to the infrared light for the capable of emitting periodical infrared light that the infrared light supply is electrical modulation frequency
Source needs the light source driver module by being controlled by microcontroller to drive, and by light source driver module by being connected with power supply, mentions
For voltage needed for infrared detector work, the infrared light that infrared light supply issues is incident to gas chamber, microcontroller by window material
Device controls micro stepping motor rotation, and acceleration sucks tested gas, be tested gas by stomata pipeline and dust-proof, water-proof cover into
Air inlet chamber, be tested gas absorb specific wavelength infrared light, through measurement gas chamber infrared light penetrate respectively reference optical filter 16,
Optical filter 17 is measured, binary channels infrared remote receiver receives and generates reference signal and measuring signal, passes through input signal conditioning mould
Block amplifies, filter after be input to after A/D conversion module is converted into digital signal, data processing module is input to, at data
Reason module is controlled by microcontroller, and control is exported and calculated to signal statistics, the concentration value of tested gas can be obtained, and pass through
Microcontroller control LCD display shows its measurement result.The result of measurement can also by microcontroller it is highly integrated based on
The wireless communication module of 6LoWPAN agreement carries out wireless networking, establishes the Wireless LAN of combustible gas detecting, expands to whole
The investigative range of a scene or building；Can also by with wireless monitor or server wireless connections, in building
Exhaust blower, controllable discharge window linkage, realize the linkage control to these controlled plants.Microcontroller is also externally provided with 4G mould
The real time data of detection and historical data can be passed through mobile Internet of Things and carry out teletransmission by block.The equipment also supports USB interface
Data transmission, detection data directly can be uploaded to various servers.GPS module is main as one of optional peripheral module
Realize the long-distance positioning function of the invention equipment, it also can timing transmission onsite alarming information.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of portable intelligent combustible gas probe, including shell (1), key (10), display screen (2), buzzer (3),
USB interface (4), stomata (5), alarm lamp (6), antenna (7), back splint (8), power supply lid (9), which is characterized in that the shell (1)
It is provided with stomata (5) through the two sidewalls of the shell (1), the shell (1) is provided with the display screen (2) and institute on one side
It states key (10), the shell (1) is provided with the back splint (8) and power supply lid (9) on one side, and the shell (1) is provided on one side
The antenna (7), the shell (1) are provided with the USB interface (4) on one side, have in the face side wall setting of the shell (1)
Buzzer (3), the shell (1) are provided with the alarm lamp (6) on the surface of the antenna (7)；In the shell (1)
Portion is provided with sensor, fan (14), micro motor (15) and pcb board (19), and the sensor includes infrared light supply (11), window
Mouth piece (12), gas chamber (13), reference optical filter (16), measurement optical filter (17), binary channels infrared remote receiver (18) and deflecting mirror
(20), the pcb board (19) is fixed on the shell (1) inside, and the shell of the gas chamber (13) is that multiple apertures are arranged not
Become rusty steel cylinder clamp mechanism, is cased with ventilative dust-proof, water-proof cover on gas chamber (13) shell.
2. portable intelligent combustible gas probe according to claim 1, which is characterized in that the sensor setting exists
In the sensor outer housing (110), the sensor outer housing (110) is fixed in the shell (1), the sensor outer housing
(110) pipeline of connection stomata (5) is provided in two side walls, the fan (14) and the micro motor (15) are fixed on
In the pipeline of the stomata (5).
3. portable intelligent combustible gas probe according to claim 1, which is characterized in that Electricity Federation on the pcb board
Be connected to microcontroller, LCD display module, light source driver module, signal conditioning module, A/D conversion module, data processing module,
Motor driving chip, the USB interface (4), 4G module, GPS module, warning circuit and power supply.
4. portable intelligent combustible gas probe described according to claim 1 ~ 3, which is characterized in that the LCD shows mould
Block, the key (10), the light source driver module, the signal conditioning module, the A/D conversion module, at the data
Manage module, the motor driving chip, the USB interface (4), the 4G module, the GPS module and the warning circuit point
Do not couple with the micro-controller communications, the power supply is electrically connected with the microcontroller, and the LCD display module electrically connects institute
State display screen (2) circuit, the motor driving chip communicates connection with the micro motor (15), the micro motor (15) with
The power supply electrically connects, and electrically connects on the warning circuit and is stated buzzer (3) and the alarm lamp (6).
5. portable intelligent combustible gas probe according to claim 3, which is characterized in that the microcontroller is
It is integrated with the integration system chip of rf receiver and transmitter based on 6LoWPAN agreement, MCU kernel, Flash ROM and RAM.
6. portable intelligent combustible gas probe described according to claim 1 ~ 5, which is characterized in that the infrared light supply
(11) it electrically connects on the light source driver module on the pcb board, the binary channels infrared remote receiver (18) electrically connects described
In signal conditioning module on pcb board.
7. portable intelligent combustible gas probe according to claim 1, which is characterized in that the infrared light supply (11)
It is the NDIR infrared sensor excitation light source using electrical modulation, working condition is pulse condition；The infrared light supply can cover
The spectral band of C-H structure in tested gas.
8. portable intelligent combustible gas probe described according to claim 1 ~ 4, which is characterized in that the USB interface (4)
It is provided with the rubber stopper of the corrosion of gas-tight body or dust entrance outside.
9. portable intelligent combustible gas probe described according to claim 1 ~ 5, which is characterized in that the antenna (7) can
Collapsible antenna, the antenna (7) couple with the micro-controller communications.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910184441.4A CN109991186A (en) | 2019-03-12 | 2019-03-12 | A kind of portable intelligent combustible gas probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910184441.4A CN109991186A (en) | 2019-03-12 | 2019-03-12 | A kind of portable intelligent combustible gas probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324977A (en) * | 2020-07-08 | 2021-08-31 | 西安工业大学 | Automatic detection equipment |
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