CN108918454A - Gas concentration detection apparatus and system - Google Patents
Gas concentration detection apparatus and system Download PDFInfo
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- CN108918454A CN108918454A CN201811158823.1A CN201811158823A CN108918454A CN 108918454 A CN108918454 A CN 108918454A CN 201811158823 A CN201811158823 A CN 201811158823A CN 108918454 A CN108918454 A CN 108918454A
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- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 229910018503 SF6 Inorganic materials 0.000 claims abstract description 80
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims abstract description 80
- 229960000909 sulfur hexafluoride Drugs 0.000 claims abstract description 79
- 238000012545 processing Methods 0.000 claims abstract description 67
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000001179 sorption measurement Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 119
- 239000001301 oxygen Substances 0.000 claims description 96
- 229910052760 oxygen Inorganic materials 0.000 claims description 96
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 24
- 230000006854 communication Effects 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 16
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical class [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 239000005864 Sulphur Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000009965 odorless effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides gas concentration detection apparatus and systems, are related to gas detection technology field, wherein the gas concentration detection apparatus includes：Central processing unit, infrared driver, infrared transmitter, infrared remote receiver and infrared comparator, infrared transmitter is with infrared remote receiver by having the infrared and radio of strong adsorption capacity to connect sulfur hexafluoride gas, central processing unit detects signal to infrared transmitter transmission timing, infrared driver drives infrared transmitter, infrared transmitter launches outward the infrared ray after being driven after receiving timing detection signal, infrared remote receiver receives passback infrared ray, returning infrared ray is generated after infrared ray adsorbs sulfur hexafluoride gas, infrared comparator compares the size between passback infrared ray and canonical reference infrared ray, central processing unit calculates the concentration value of sulfur hexafluoride gas in environment according to comparison result, to realize effective monitoring to sulfur hexafluoride gas concentration in environment.
Description
Technical field
The present invention relates to gas detection technology field more particularly to gas concentration detection apparatus and systems.
Background technique
Sulfur hexafluoride (chemical formula SF6) it is a kind of colourless, odorless, nontoxic, non-ignitable inert gas, its molecular weight is
146.07, at 20 DEG C and 0.1MPa, density is 6.1kg/m3, about the 5 of atmospheric density times.Sulfur hexafluoride is at normal temperatures and pressures
For gaseous state, critical-temperature is 45.6 DEG C, and triple point is -50.8 DEG C, and sublimation point temperature is -63.8 DEG C under normal pressure.Hexafluoro
Change sulphur content minor structure in octahedra arrangement, bonding is apart from small, bonded energy is high, therefore its stability is very high.
It needs to be monitored sulfur hexafluoride gas concentration in the environment such as substation's sulphur hexafloride circuit breaker room, the room GIS, from
For special rationality matter, sulfur hexafluoride gas is the gas of a colorless and odorless, because the density of sulfur hexafluoride gas is bigger, leakage
It can sink to causing oxygen to be forced to top into air, and then the staff that will lead in the environment such as switch gear room, the room GIS stops up
Breath.Chemically sulfur hexafluoride gas is a non-toxic gas for property, but because this gas is mainly used for high pressure arc extinguishing,
When there is forceful electric power to be electrolysed, S element and F element are with O2Reaction can generate SO, SO2Deng harmful body gas.So being equipped with hexafluoro
Sulfur hexafluoride gas concentration must be monitored in the environment of sulphur high-tension apparatus by changing.And it there is no effective monitoring method at present.
Summary of the invention
In view of this, the embodiment of the present invention has been designed to provide gas concentration detection apparatus and system, pass through setting
Central processing unit, infrared driver, infrared transmitter, infrared remote receiver and infrared comparator etc., improve to hexafluoro in environment
Change the monitoring efficiency of sulphur gas concentration.
In a first aspect, the embodiment of the invention provides gas concentration detection apparatus, including：Central processing unit, infrared driving
Device, infrared transmitter, infrared remote receiver and infrared comparator；
The central processing unit, the infrared driver and the infrared transmitter are sequentially connected, the infrared transmitter
It is connected with the infrared remote receiver by infrared and radio, the infrared remote receiver is connected with the infrared comparator, described
Infrared comparator is connected with the central processing unit, wherein the infrared ray has strong suction to the sulfur hexafluoride gas in environment
Attached ability；
The central processing unit, for detecting signal to the infrared transmitter transmission timing；
The infrared driver drives for the infrared ray to be emitted the infrared transmitter；
The infrared transmitter, it is described red after being driven for being launched outward after receiving the timing detection signal
Outside line；
The infrared remote receiver, for receiving passback infrared ray, wherein the passback infrared ray is the infrared ray to ring
What the sulfur hexafluoride gas in border generated after being adsorbed；
The infrared comparator, for the size between the passback infrared ray and canonical reference infrared ray, and, it will
Comparison result is sent to the central processing unit；
The central processing unit is also used to calculate the concentration value of sulfur hexafluoride gas in environment according to the comparison result.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein also
Including the oxygen sensor and oxygen transmission device being connected；
The oxygen transmission device is connected with the central processing unit；
The oxygen sensor, for acquiring the oxygen data in environment, and, oxygen letter is converted by the oxygen data
Number；
The oxygen transmission device, for being pre-processed to the oxygen signal, and, by the oxygen after pretreatment
Signal is sent to the central processing unit；
The central processing unit is also used to calculate the concentration value of oxygen in environment according to the oxygen signal.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein further include Temperature Humidity Sensor, the Temperature Humidity Sensor is connected with the central processing unit
It connects；
The Temperature Humidity Sensor, for acquiring the data of the Temperature and Humidity module in environment, and, it converts the data of the Temperature and Humidity module to
Temperature-humidity signal；
The central processing unit obtains temperature and humidity and shows signal for handling the temperature-humidity signal, and, lead to
It crosses synchronous serial interface and exports the temperature and humidity display signal outward.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein further include 485 communication interfaces, 485 communication interface is connected with the central processing unit；
485 communication interface, for being sent out the sulfur hexafluoride gas after receiving data call triggering
Concentration value, the concentration value of the oxygen or the temperature and humidity show signal.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein further include alarm, the alarm is connected with the central controller；
The alarm is higher than sulfur hexafluoride level threshold value for the concentration value in the sulfur hexafluoride gas, and, it is described
The concentration value of oxygen sends out light warning when being lower than oxygen level threshold value.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the 5th kind of first aspect
Possible embodiment, wherein the Temperature Humidity Sensor includes that the NTC type temperature sensor being connected in parallel and resistance-type are opposite
Humidity sensor；
The NTC type temperature sensor, for carrying out temperature-compensating to the data of the Temperature and Humidity module in conversion process, so that
The data of the Temperature and Humidity module in conversion process keeps temperature consistent with the data of the Temperature and Humidity module at acquisition moment；
The resistance-type relative humidity sensor, for carrying out humidity benefit to the data of the Temperature and Humidity module in conversion process
It repays, so that the data of the Temperature and Humidity module in conversion process keeps humidity consistent with the data of the Temperature and Humidity module at acquisition moment.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 6th kind of first aspect
Possible embodiment, wherein further include the sulfur hexafluoride transport and placing device and sulfur hexafluoride analog-digital converter being connected, the hexafluoro
Change sulphur transport and placing device to be connected with the infrared remote receiver, the sulfur hexafluoride analog-digital converter is also connected with the infrared comparator
It connects；
The sulfur hexafluoride transport and placing device, for amplifying processing to the passback infrared ray；
The sulfur hexafluoride analog-digital converter, for converting digital signal by analog signal for the passback infrared ray.
The 6th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 7th kind of first aspect
Possible embodiment, wherein the oxygen transmission device includes the oxygen transport and placing device and oxygen analog-digital converter being connected,
In, the oxygen transport and placing device is identical as the amplification coefficient of the sulfur hexafluoride transport and placing device, the oxygen analog-digital converter with it is described
The transformation ratio of sulfur hexafluoride analog-digital converter is identical,
The oxygen transport and placing device, for amplifying processing to the oxygen signal；
The oxygen analog-digital converter, for converting digital signal by analog signal for the oxygen signal.
Second aspect, the embodiment of the invention provides gas concentration detection systems, including：Host computer and any of the above-described institute
The gas concentration detection apparatus stated；
It is connected between the host computer and the gas concentration detection apparatus by narrowband Internet of Things；
The host computer, for sending data call touching to the gas concentration detection apparatus by the narrowband Internet of Things
Hair, so that the gas concentration detection apparatus is sent out the concentration value or warm and humid of the concentration value of sulfur hexafluoride gas, oxygen
Degree display signal.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein also
Including mobile terminal, the mobile terminal is wirelessly connected with the host computer；
The mobile terminal, for sending detection open signal to the host computer, to control the gas concentration detection
Device starts to be detected；And detection stop signal, stop detection to control the gas concentration detection apparatus.
Gas concentration detection apparatus provided in an embodiment of the present invention and system, wherein the gas concentration detection apparatus includes：
Central processing unit, infrared driver, infrared transmitter, infrared remote receiver and infrared comparator, in the apparatus, above-mentioned centre
Reason device, infrared driver and infrared transmitter are sequentially connected, also, infrared transmitter and infrared remote receiver pass through infrared and radio
Connection, infrared remote receiver are connected with infrared comparator, and infrared comparator is connected with central processing unit, needs to be illustrated
It is that infrared ray has strong adsorption capacity to the sulfur hexafluoride gas in environment, in this way, infrared ray is launched into environment to lithium
Sulphur gas is adsorbed, and is returned in central processing unit and be further processed after absorption.When it is implemented, central before this
Processor is used to detect signal to infrared transmitter transmission timing, in order to make the infrared ray of transmitting have sufficiently large penetration power,
It is infrared driver later for being driven to infrared transmitter, so that the infrared energy to be emitted is sufficiently large, Zhi Houshi
Infrared transmitter is used to launch outward the infrared ray after being driven after receiving timing detection signal, for the prison of continuous and effective
The sulfur hexafluoride gas concentration in environment is measured, it is infrared receiver later that timing detection signal here, which is usually real-time detection,
Device needs to be illustrated, passback infrared ray is infrared ray to the sulfur hexafluoride gas in environment for receiving passback infrared ray
What body generated after being adsorbed, be that infrared comparator is big between passback infrared ray and canonical reference infrared ray for comparing later
Small, in general, canonical reference infrared ray is the reference value calculated during concentration, also, infrared comparator sends comparison result
It is the concentration that central processing unit is also used to calculate sulfur hexafluoride gas in environment according to comparison result later to central processing unit
Value, by above-mentioned treatment process, i.e., has very strong absorption characteristic using the infrared light of specific band, to realize to lithium
The real-time monitoring of sulphur gas concentration.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 shows the connection figure of gas concentration detection apparatus provided by the embodiment of the present invention one；
Fig. 2 shows the connection schematic diagrams of gas concentration detection apparatus provided by the embodiment of the present invention one；
Fig. 3 shows the structural framing figure of gas concentration detection apparatus provided by the embodiment of the present invention one.
Icon：1- central processing unit；The infrared driver of 2-；3- infrared transmitter；4- infrared remote receiver；The infrared comparison of 5-
Device；6- oxygen sensor；7- oxygen transmission device；71- oxygen transport and placing device；72- oxygen analog-digital converter；8- Temperature Humidity Sensor；
9-485 communication interface；10- alarm.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
The monitoring of sulfur hexafluoride gas concentration is most important to sulphur hexafloride circuit breaker room, the room GIS etc., the reason is as follows that：From spy
For rationality matter, sulfur hexafluoride gas is the gas of a colorless and odorless, because the density of sulfur hexafluoride gas is bigger, is leaked into
It can sink to causing oxygen to be forced to top in air, and then will lead to the asphyxia of the staff in the environment such as switch gear room, the room GIS.
Chemically sulfur hexafluoride gas is a non-toxic gas for property, but because this gas is mainly used for high pressure arc extinguishing, when
When having forceful electric power to be electrolysed, S element and F element are with O2Reaction can generate SO, SO2Deng harmful body gas, in the environment
Staff causes security risk.
Based on this, the embodiment of the invention provides gas concentration detection apparatus and systems, are retouched below by embodiment
It states.
Embodiment one
Referring to figure 1, figure 2 and figure 3, the gas concentration detection apparatus that the present embodiment proposes specifically includes：Central processing unit 1,
Infrared driver 2, infrared transmitter 3, infrared remote receiver 4 and infrared comparator 5, it is in the apparatus, above-mentioned central processing unit, red
Outer driver and infrared transmitter are sequentially connected, and being connected here can be to be directly connected to by conducting wire etc., infrared transmitter and red
Outer receiver is connected by infrared and radio, i.e., infrared ray is received after infrared transmitter emits by infrared remote receiver, infrared to connect
It receives device to be connected with infrared comparator, infrared comparator is connected with central processing unit, needs to be illustrated, infrared ray pair
Sulfur hexafluoride gas in environment has strong adsorption capacity, carries out in this way, infrared ray is launched into environment to sulfur hexafluoride gas
Absorption, is capable of the content of actual response sulfur hexafluoride gas, not affected by environment, and returns in central processing unit after absorption
It is further processed.
When it is implemented, central processing unit is used to detect signal to infrared transmitter transmission timing, i.e., actively extract test
Point gas, in order to which the infrared energy for emitting infrared transmitter is sufficiently large, infrared driver is for that will send out infrared transmitter
The infrared ray penetrated is driven, thus the energy and range of the enhancing infrared ray to be emitted, later, infrared transmitter is for connecing
The infrared ray after being driven is launched outward after receiving timing detection signal, and the inlet sensor that infrared sensor uses, performance is steady
Fixed, no drift is reproducible, because using intermittent duty service life, up to 20 years, measurement range can reach 0-
3000ppm, precision ± 2%F.S.Later, infrared remote receiver is needed to be illustrated, be returned for receiving passback infrared ray
Infrared ray is generated after infrared ray adsorbs the sulfur hexafluoride gas in environment, and the hexafluoro in the passback infrared ray is passed through
Change the measurement of the concentration of sulphur gas, can sulfur hexafluoride gas concentration in accurate characterization environment, later, infrared comparator is used for
Compare the size between passback infrared ray and canonical reference infrared ray, it should be noted that canonical reference infrared ray is that calculating is dense
Standard reference value during degree, in general, the concentration value of sulfur hexafluoride gas corresponding to the standard reference value is can be direct
It reads, also, comparison result is sent to central processing unit by infrared comparator, central processing unit is also used to according to comparison result
The concentration value of sulfur hexafluoride gas in environment is calculated, here, comparison result can be passback infrared ray and canonical reference infrared ray
Between difference or quotient, the corresponding relationship of the concentration value of obtained difference or quotient and the sulfur hexafluoride gas in environment can be according to priori
Data are calculated.
Further, since signal has decaying during processing, in order to ensure that the infrared ray that central processing unit receives is believed
Number amplitude it is equal with the collected passback amplitude of infrared ray of infrared remote receiver, gas concentration detection apparatus further includes being connected
Sulfur hexafluoride transport and placing device and sulfur hexafluoride analog-digital converter, sulfur hexafluoride transport and placing device is connected with infrared remote receiver, lithium
Sulphur analog-digital converter is also connected with infrared comparator, and in use process, sulfur hexafluoride transport and placing device was used for infrared to returning before this
Line amplifies processing, i.e., amplifies processing to the amplitude of passback infrared ray, and sulfur hexafluoride analog-digital converter is used to incite somebody to action later
It returns infrared ray and digital signal is converted by analog signal, i.e., be sent into infrared comparator and be further processed after progress A/D conversion.
In addition, gas concentration detection apparatus further includes the oxygen sensor 6 and oxygen transmission device 7 being connected, oxygen sensor
Device MAX250, measurement accuracy is high, performance is stable, without drift, reproducible, and service life can reach 5 years, and measurement range can reach
0-25%, precision ± 0.5%, oxygen transmission device are connected with central processing unit, and oxygen sensor is used to acquire the oxygen in environment
Destiny evidence, also, oxygen signal is converted by oxygen data, oxygen transmission device is used to pre-process oxygen signal, also,
Oxygen signal after pretreatment is sent to central processing unit, central processing unit is also used to calculate in environment according to oxygen signal
The concentration value of oxygen.
Likewise, since signal has decaying during processing, in order to ensure that the oxygen that central processing unit receives is believed
Number amplitude it is equal with the amplitude of the collected oxygen signal of oxygen sensor, oxygen transmission device includes the oxygen amplifier being connected
Device 71 and oxygen analog-digital converter 72, need to be illustrated, the amplification coefficient of oxygen transport and placing device and sulfur hexafluoride transport and placing device
It is identical, the comparative situation of sulfur hexafluoride and oxygen in the same environment of synchronization can be effectively compared in this way, and then is measured
The suitability degree of environment out.It is to be appreciated that oxygen analog-digital converter is identical as the transformation ratio of sulfur hexafluoride analog-digital converter, oxygen
Transport and placing device amplifies processing, oxygen analog-to-digital conversion to the amplitude of oxygen signal for amplifying processing to oxygen signal
Device is used to convert digital signal by analog signal for oxygen signal, i.e., is sent into central processing unit after progress A/D conversion into one
Step processing.
Further, since temperature and humidity influence is affected to the detection of gas concentration, therefore, detects and fill in the gas concentration
Setting further includes Temperature Humidity Sensor 8, which has the spies such as super low-power consumption, precision height, good long-time stability
Point, temperature measurement range can reach -40-85 DEG C, and precision ± 0.5 DEG C, moisture measurement range can reach 0-99%, precision ± 2%.
The Temperature Humidity Sensor is connected with central processing unit, and in implementation process, Temperature Humidity Sensor is warm and humid in environment for acquiring
Degree evidence, also, temperature-humidity signal is converted by data of the Temperature and Humidity module, to be converted into the number for facilitating central processing unit to be handled
According to later, central processing unit is used to handle temperature-humidity signal, including temperature-humidity signal is converted into according to preset format
Corresponding choice is carried out convenient for the signal of display, by temperature-humidity signal to obtain the display signal of corresponding precision or believe temperature and humidity
Number carry out overstriking (or marker color etc.) obtain signal for being more advantageous to display etc. to get to temperature and humidity show signal, also,
During display, central processing unit by synchronous serial interface export outward temperature and humidity show signal, thus facilitate people into
Row checks, due to, synchronous serial interface, that is, SPI interface be a kind of high speed, full duplex, synchronization communication bus, and in core
Four lines are only taken up on the pin of piece, have saved the pin of chip, while to save space in the layout of PCB, being provided conveniently.
In addition, Temperature Humidity Sensor includes the NTC type temperature sensor and resistance-type relative humidity sensor of parallel connection,
Temperature collection data and humidity data are distinguished by the two.NTC temperature sensor is a kind of thermistor, probe, resistance
As the temperature rises and declines rapidly for value, can be good at the variation of sense temperature according to the thermally sensitive characteristic.Moreover,
The size of NTC temperature sensor is flexible, is easy to use.In implementation process, temperature data from be collected it is processed during
Can be lossy, NTC type temperature sensor can carry out temperature-compensating to the data of the Temperature and Humidity module in conversion process, so that conversion process
In data of the Temperature and Humidity module with acquisition the moment data of the Temperature and Humidity module keep temperature it is consistent, to improve temperature measurement accuracy.Equally
, humidity data from be collected it is processed during also can be lossy, resistance-type relative humidity sensor is using wet sensitive
The electrical characteristic (such as resistance value) of element, the principle changed with the variation of humidity carry out the sensor of moisture measurement, implemented
Cheng Zhong, resistance-type relative humidity sensor is used to carry out humidity compensation to the data of the Temperature and Humidity module in conversion process, so that transformed
Data of the Temperature and Humidity module in journey keeps humidity consistent with the data of the Temperature and Humidity module at acquisition moment, to improve moisture measurement precision.
In addition, gas concentration detection apparatus further includes that 485 communication interface, 9,485 communication interface is connected with central processing unit
It connects.
Lower 485 communication interfaces are introduced first, and the communication distance of the corresponding serial bus standard of 485 communication interfaces is tens meters
To upper km.Balance transmission and differential received are used in 485 communication process, therefore there is the ability for inhibiting common mode interference.With
RS-232 is compared, and carries out the chip that communication is hardly damaged interface circuit, also, the electricity of 485 communication interfaces using 485 communication interfaces
It is flat compatible with Transistor-Transistor Logic level, it can facilitate and TTL circuit connection.485 communication interfaces have good noise immunity, long biography
The above-mentioned advantage such as defeated distance and multistation ability just becomes preferred serial line interface.In implementation process, 485 communication interfaces are equal
It is transmitted using Shielded Twisted Pair.
In the operational process of gas concentration detection apparatus, 485 communication interfaces are used to receive data call triggering (example
Such as, the calling triggering of host computer is sent sulfur hexafluoride, oxygen or temperature and humidity) after be sent out the concentration of sulfur hexafluoride gas
Value, the concentration value of oxygen or temperature and humidity show signal.It should be noted that above-mentioned data call triggering and sulfur hexafluoride gas
Concentration value, oxygen concentration value or temperature and humidity show signal between corresponding relationship can flexibly be set according to usage scenario
It sets.
In addition, being pointed out in national standard, when sulfur hexafluoride gas concentration is higher than 1000ppm in environment and oxygen concentration is low
In 18%, warning output movement is carried out.When monitoring result occur it is abnormal (i.e. sulfur hexafluoride gas concentration be higher than 1000ppm with
And oxygen concentration lower than 18%) when, abnormal results are exported for convenience, so that related management personnel be made to safeguard,
Gas concentration detection apparatus further includes alarm 10, and alarm is connected with central controller, and in use, alarm is used
It is higher than sulfur hexafluoride level threshold value in the concentration value in sulfur hexafluoride gas, needs to be illustrated, above-mentioned sulfur hexafluoride mark
Quasi- threshold value is that sulfur hexafluoride gas concentration is in the maximum concentration value in normal range (NR), to realize dense to sulfur hexafluoride gas
Effective monitoring of degree.Also, the concentration value of oxygen sends out light warning when being lower than oxygen level threshold value, needs to be illustrated
, above-mentioned oxygen level threshold value is that oxygen concentration is in the maximum concentration value in normal range (NR), to realize dense to oxygen
Effective monitoring of degree.
In conclusion gas concentration detection apparatus provided in this embodiment includes：It is central processing unit, infrared driver, red
External transmitter, infrared remote receiver and infrared comparator, in implementation process, central processing unit is used to the infrared transmitter into environment
Transmission timing detects signal, and in order to make infrared transmitter have enough detectabilities, infrared driver is used for infrared transmitter
The infrared ray to be emitted is driven, and infrared transmitter is used for after launching outward and being driven after receiving timing detection signal
Infrared ray, in this way, infrared remote receiver needs to be illustrated, passback infrared ray is infrared ray for receiving passback infrared ray
It is generated after being adsorbed to the sulfur hexafluoride gas in environment, passback infrared ray and canonical reference is compared by infrared comparator
Size between infrared ray, also, comparison result is sent to central processing unit, central processing unit is also used to according to comparison result
The concentration value for calculating sulfur hexafluoride gas in environment has very strong by journey processed above using the infrared light of specific band
Absorption characteristic, and being used cooperatively by infrared driver, infrared transmitter and infrared remote receiver, realize to sulfur hexafluoride gas
The real-time monitoring of bulk concentration provides safety guarantee for the staff in the environment.
Embodiment two
Present embodiments providing gas concentration detection system includes：The gas concentration of host computer and any of the above-described detection dress
It sets, within the system, is connected between host computer and gas concentration detection apparatus by narrowband Internet of Things, above-mentioned narrowband Internet of Things
(full name in English is Narrow Band Internet of Things, English abbreviation NB-IoT) is the one of all things on earth internet
A important branch.NB-IoT is implemented in cellular network, only consume about 180KHz bandwidth, can be deployed directly into GSM network,
UMTS network or LTE network, to reduce lower deployment cost, realize smooth upgrade.NB-IoT supports low power consuming devices in wide area network
Cellular data connection, support that stand-by time is long, the efficient connection to network connectivity requirements higher device.In application process,
NB-IoT has the characteristics that covering is wide, connection is more, rate is fast, at low cost, low in energy consumption, framework is excellent etc..
In specific implementation process, host computer (for example, computer etc.) is used to detect by narrowband Internet of Things to gas concentration and fill
It sets and sends data call triggering, i.e., when people want to check the data that gas concentration detection apparatus is tested, can pass through a little
It hits or triggers host computer and generate data call triggering, and pass through the NB-IoT communication technology and data call is sent to gas
Bulk concentration detection device, in this way, so that gas concentration detection apparatus be sent out the concentration value of sulfur hexafluoride gas, oxygen it is dense
Angle value or temperature and humidity show signal.Here it remarks additionally, can be triggered by different types of data call to distinguish
It transfers the concentration value of sulfur hexafluoride gas, the concentration value of oxygen or temperature and humidity and shows signal.Either, pass through different numbers
Data call triggers to transfer the concentration value of the concentration value of sulfur hexafluoride gas, oxygen or temperature and humidity respectively and show signal.
In addition, people flexibly control gas concentration detection apparatus for convenience, above-mentioned gas concentration detection system
In further include mobile terminal, mobile terminal wirelessly (for example, 4G or WiFi) is connected with host computer.Implementation process
In, mobile terminal is used to send detection open signal to host computer will test by host computer by the NB-IoT communication technology later
Open signal is sent to gas concentration detection apparatus, starts to be detected to control gas concentration detection apparatus, and, it is mobile whole
End, which is used to send detection stop signal to host computer, will test stop signal by the NB-IoT communication technology by host computer later
It is sent to gas concentration detection apparatus, stops detection to control gas concentration detection apparatus, to facilitate people right whenever and wherever possible
Gas concentration detection apparatus is controlled.
In conclusion gas concentration detection system provided in this embodiment is dense by host computer and gas by narrowband Internet of Things
It spends detection device to be connected, and realizes the data display effect to gas concentration detection apparatus via host computer, thus convenient low
The signal transmission of consumption realized between host computer and gas concentration detection apparatus.Further, by mobile terminal with it is upper
Wireless connection between machine enables people to realize the flexible control to gas concentration detection apparatus according to demand, convenient and efficient.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can be with reference to the corresponding process in previous embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.To those skilled in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
Finally it should be noted that：Embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that：Anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. gas concentration detection apparatus, which is characterized in that including：It is central processing unit, infrared driver, infrared transmitter, infrared
Receiver and infrared comparator；
The central processing unit, the infrared driver and the infrared transmitter are sequentially connected, the infrared transmitter and institute
It states infrared remote receiver to connect by infrared and radio, the infrared remote receiver is connected with the infrared comparator, described infrared
Comparator is connected with the central processing unit, wherein the infrared ray has adsorption capacity to the sulfur hexafluoride gas in environment；
The central processing unit, for detecting signal to the infrared transmitter transmission timing；
The infrared driver drives for the infrared ray to be emitted the infrared transmitter；
The infrared transmitter, it is described infrared after being driven for being launched outward after receiving the timing detection signal
Line；
The infrared remote receiver, for receiving passback infrared ray, wherein the passback infrared ray is the infrared ray in environment
Sulfur hexafluoride gas adsorbed after generate；
The infrared comparator, for the size between the passback infrared ray and canonical reference infrared ray, and, it will compare
As a result it is sent to the central processing unit；
The central processing unit is also used to calculate the concentration value of sulfur hexafluoride gas in environment according to the comparison result.
2. gas concentration detection apparatus according to claim 1, which is characterized in that further include the oxygen sensor being connected
With oxygen transmission device；
The oxygen transmission device is connected with the central processing unit；
The oxygen sensor, for acquiring the oxygen data in environment, and, oxygen signal is converted by the oxygen data；
The oxygen transmission device, for being pre-processed to the oxygen signal, and, by the oxygen signal after pretreatment
It is sent to the central processing unit；
The central processing unit is also used to calculate the concentration value of oxygen in environment according to the oxygen signal.
3. gas concentration detection apparatus according to claim 2, which is characterized in that it further include Temperature Humidity Sensor, it is described
Temperature Humidity Sensor is connected with the central processing unit；
The Temperature Humidity Sensor, for acquiring the data of the Temperature and Humidity module in environment, and, it converts the data of the Temperature and Humidity module to warm and humid
Spend signal；
The central processing unit obtains temperature and humidity and shows signal for handling the temperature-humidity signal, and, by same
Step serial line interface exports the temperature and humidity outward and shows signal.
4. gas concentration detection apparatus according to claim 3, which is characterized in that it further include 485 communication interfaces, it is described
485 communication interfaces are connected with the central processing unit；
485 communication interface, for being sent out the concentration of the sulfur hexafluoride gas after receiving data call triggering
Value, the concentration value of the oxygen or the temperature and humidity show signal.
5. gas concentration detection apparatus according to claim 4, which is characterized in that it further include alarm, the alarm
It is connected with the central controller；
The alarm is higher than sulfur hexafluoride level threshold value for the concentration value in the sulfur hexafluoride gas, and, the oxygen
Concentration value be lower than oxygen level threshold value when send out light warning.
6. gas concentration detection apparatus according to claim 3, which is characterized in that the Temperature Humidity Sensor includes parallel
The NTC type temperature sensor and resistance-type relative humidity sensor of connection；
The NTC type temperature sensor, for carrying out temperature-compensating to the data of the Temperature and Humidity module in conversion process, so that conversion
The data of the Temperature and Humidity module in the process keeps temperature consistent with the data of the Temperature and Humidity module at acquisition moment；
The resistance-type relative humidity sensor, for carrying out humidity compensation to the data of the Temperature and Humidity module in conversion process, with
The data of the Temperature and Humidity module in conversion process is set to keep humidity consistent with the data of the Temperature and Humidity module at acquisition moment.
7. gas concentration detection apparatus according to claim 6, which is characterized in that further include the sulfur hexafluoride fortune being connected
Device and sulfur hexafluoride analog-digital converter are put, the sulfur hexafluoride transport and placing device is connected with the infrared remote receiver, described lithium
Sulphur analog-digital converter is also connected with the infrared comparator；
The sulfur hexafluoride transport and placing device, for amplifying processing to the passback infrared ray；
The sulfur hexafluoride analog-digital converter, for converting digital signal by analog signal for the passback infrared ray.
8. gas concentration detection apparatus according to claim 7, which is characterized in that the oxygen transmission device includes being connected
Oxygen transport and placing device and oxygen analog-digital converter, wherein the amplification system of the oxygen transport and placing device and the sulfur hexafluoride transport and placing device
Number is identical, and the oxygen analog-digital converter is identical as the transformation ratio of the sulfur hexafluoride analog-digital converter,
The oxygen transport and placing device, for amplifying processing to the oxygen signal；
The oxygen analog-digital converter, for converting digital signal by analog signal for the oxygen signal.
9. gas concentration detection system, which is characterized in that including：Host computer and such as described in any item gases of claim 1-8
Concentration detection apparatus；
It is connected between the host computer and the gas concentration detection apparatus by narrowband Internet of Things；
The host computer, for sending data call triggering to the gas concentration detection apparatus by the narrowband Internet of Things,
So that the gas concentration detection apparatus is sent out the concentration value of sulfur hexafluoride gas, the concentration value of oxygen or temperature and humidity and shows
Show signal.
10. gas concentration detection system according to claim 9, which is characterized in that it further include mobile terminal, the movement
Terminal is wirelessly connected with the host computer；
The mobile terminal, for sending detection open signal to the host computer, to control the gas concentration detection apparatus
Start to be detected；And detection stop signal, stop detection to control the gas concentration detection apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158823.1A CN108918454A (en) | 2018-09-30 | 2018-09-30 | Gas concentration detection apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158823.1A CN108918454A (en) | 2018-09-30 | 2018-09-30 | Gas concentration detection apparatus and system |
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| CN108918454A true CN108918454A (en) | 2018-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349375A (en) * | 2019-08-19 | 2019-10-18 | 广东电网有限责任公司 | A kind of SF6 electrical equipment gas leakage alarming system |
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| CN201535748U (en) * | 2009-08-03 | 2010-07-28 | 任天佑 | Infrared sulfur hexafluoride gas concentration transmitter |
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| KR20170088218A (en) * | 2016-01-22 | 2017-08-01 | 한림대학교 산학협력단 | Device and Method for Gas Concentration Measurement using Infrared Sensors |
| CN209589834U (en) * | 2018-09-30 | 2019-11-05 | 江苏七塔电力科技有限公司 | Gas concentration detection apparatus and system |
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| CN201535748U (en) * | 2009-08-03 | 2010-07-28 | 任天佑 | Infrared sulfur hexafluoride gas concentration transmitter |
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