CN104897859A - Indoor methanol concentration detecting system with temperature compensating function - Google Patents
Indoor methanol concentration detecting system with temperature compensating function Download PDFInfo
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- CN104897859A CN104897859A CN201510350345.4A CN201510350345A CN104897859A CN 104897859 A CN104897859 A CN 104897859A CN 201510350345 A CN201510350345 A CN 201510350345A CN 104897859 A CN104897859 A CN 104897859A
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- formaldehyde
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title abstract 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 226
- 238000001514 detection method Methods 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 210000001508 eye Anatomy 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- AFAIELJLZYUNPW-UHFFFAOYSA-N pararosaniline free base Chemical compound C1=CC(N)=CC=C1C(C=1C=CC(N)=CC=1)=C1C=CC(=N)C=C1 AFAIELJLZYUNPW-UHFFFAOYSA-N 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention discloses an indoor methanol concentration detecting system with a temperature compensating function. The indoor methanol concentration detecting system comprises a methanol concentration sensor, a temperature sensor, an analog/digital converting module, a microcontroller module, a display module and a data transmission module, wherein the methanol concentration sensor and the temperature sensor are connected with the microcontroller module via the analog/digital converting module; and the display module and the data transmission module are connected to corresponding ports of the microcontroller module.
Description
Technical field
The present invention relates to a kind of concentration of formaldehyde detection system, particularly relate to a kind of indoor formaldehyde concentration detection system with temperature compensation, belong to Concentration Testing control field.
Background technology
Formaldehyde is a kind of toxic gas, and it is extensively present in home decoration material, endangers the healthy of people, and the monitoring therefore for formaldehyde seems particularly important.Along with the development of technology, the monitoring of formaldehyde is mainly towards real-time response, operation simplification, low-power consumption, low cost future development.At present, domestic also have some to make instrument about Formaldehyde, and they adopt external electrochemical sensor, but cost is higher.
Formaldehyde (HCHO) is a kind of colourless at normal temperatures, the gas of irritant smell, soluble in water, alcohol and ether.The eyes, respiratory system, nervous system etc. of formaldehyde to people all have strong harm, and Long contact time can cause tissue aberrations and cause canceration, and therefore it is a kind of potential dangerous carcinogenic substance and important environmental contaminants, to human body serious harm.
The GB detection method of current formaldehyde mainly contains chemical method and the large class of instrumental method two.Chemical method mainly contains phenol reagent process, acetylacetone method, off-color acid method, hydrochloric para-rosaniline method etc.Instrumental method mainly comprises vapor-phase chromatography, the chromatography of ions, Single Sweep Polarographic Determination method etc.These methods have respective advantage, all meet degree of certainty generally high, the requirement that measurement range is wide.But these methods are all belong to offline inspection, analyze after namely laboratory being gone back in gaseous sample collection; So carry out that sense cycle is long, cost is high, complex steps according to the method described above, directly can not carry out at scene to be detected, the pollution level of Indoor Air Formaldehyde cannot be reflected in real time and meet the monitoring needs of on-the-spot large quantities of measuring point.
Existing air formaldehyde is tested oneself box low price, simple to operate, but error is large, because naked eyes judge differing greatly of color, therefore can not reflect the content of formaldehyde of reality completely really; Portable detector accuracy of detection is high, but expensive, is not suitable for mass marketing.
Such as application number is a kind of Portable formaldehyde concentration pick-up unit of " 201310055716.7 ", comprises drawing fan, for absorbing air to be detected; Transparent vessel, for holding phenol reagent solution, the formaldehyde in air and phenol reagent solution reaction generate piperazine; Optical sensor, described optical sensor is two pieces; LED, for described light sensors solution colour provides illumination; Microprocessor, processes the voltage signal that described optical sensor transmits; Display, for showing the numerical value of concentration of formaldehyde.Still further provides a kind of concentration of formaldehyde detection method using said apparatus.This beneficial effect of the invention is: accurately can extrapolate the concentration of formaldehyde in certain volume air fast, and more portable.
And for example application number is a kind of online concentration of formaldehyde pick-up unit being applicable to air purifier of " 201410443047.5 ", comprising: for detecting the sensor of air formaldehyde concentration; For the transition components of current/voltage conversion, described transition components is connected with described sensor; By the ADC sampling component that two close cycles amplifying circuit is connected with described transition components, described ADC sampling component is follow-up is provided with A/D analog to digital converter; MCU disposal system, described MCU disposal system is connected with described A/D analog to digital converter signal, and described MCU disposal system includes processor, and described processor is connected with display by RS485 communication protocol.This beneficial effect of the invention is: online concentration of formaldehyde pick-up unit, optional position required in air purifier body can be loaded on, the levels of formaldehyde in on-line real-time measuremen air purifier process pure air, accuracy of detection is high, stability is strong, and the data detected are transferred to display device show in real time, the real-time content of formaldehyde can be checked intuitively.
Summary of the invention
Technical matters to be solved by this invention provides a kind of indoor formaldehyde concentration detection system with temperature compensation for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of indoor formaldehyde concentration detection system with temperature compensation, comprise concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, display module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, and described display module and data transmission module are connected on the corresponding port of micro controller module;
Wherein, concentration of formaldehyde sensor, for Real-time Collection indoor formaldehyde concentration parameter;
Temperature sensor, for Real-time Collection concentration of formaldehyde sensor sheet surface temperature;
Analog-to-digital conversion module, for converting the simulating signal of concentration of formaldehyde sensor and temperature sensor collection to electric signal;
Micro controller module, for drawing indoor formaldehyde concentration according to the indoor formaldehyde concentration parameter of concentration of formaldehyde sensor collection in conjunction with the temperature parameter analysis of temperature sensor collection;
Display module, for showing the indoor formaldehyde concentration that micro controller module analysis draws in real time;
Data transmission module, the indoor formaldehyde concentration for micro controller module analysis being drawn transfers to Surveillance center and carries out remote monitoring.
As a kind of further preferred version with the indoor formaldehyde concentration detection system of temperature compensation of the present invention, described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors.
As a kind of further preferred version with the indoor formaldehyde concentration detection system of temperature compensation of the present invention, described temperature sensor adopts platinum resistance.
As a kind of further preferred version with the indoor formaldehyde concentration detection system of temperature compensation of the present invention, described micro controller module adopts AVR series monolithic.
As a kind of further preferred version with the indoor formaldehyde concentration detection system of temperature compensation of the present invention, described display module adopts LCD display.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, volume of the present invention is little, quality is light, low in energy consumption, cost is low;
2, the present invention adopts eight array metal oxide semiconductor Real-time Collection indoor formaldehyde concentrations, detects semiconductor simultaneously in real time and changes from own temperature, effectively avoid the impact that temperature is brought accuracy of detection.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, the present invention designs a kind of indoor formaldehyde concentration detection system with temperature compensation, comprise concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, display module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, and described display module and data transmission module are connected on the corresponding port of micro controller module;
Wherein, concentration of formaldehyde sensor, for Real-time Collection indoor formaldehyde concentration parameter;
Temperature sensor, for Real-time Collection concentration of formaldehyde sensor sheet surface temperature;
Analog-to-digital conversion module, for converting the simulating signal of concentration of formaldehyde sensor and temperature sensor collection to electric signal;
Micro controller module, for drawing indoor formaldehyde concentration according to the indoor formaldehyde concentration parameter of concentration of formaldehyde sensor collection in conjunction with the temperature parameter analysis of temperature sensor collection;
Display module, for showing the indoor formaldehyde concentration that micro controller module analysis draws in real time;
Data transmission module, the indoor formaldehyde concentration for micro controller module analysis being drawn transfers to Surveillance center and carries out remote monitoring.
The present invention adopts eight array metal oxide semiconductor Real-time Collection indoor formaldehyde concentrations, detects semiconductor simultaneously in real time and changes from own temperature, effectively avoid the impact that temperature is brought accuracy of detection.
Wherein, described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors, and described temperature sensor adopts platinum resistance.Described micro controller module adopts AVR series monolithic.Described display module adopts LCD display.
Sensor component is the core of Formaldehyde device, and it directly determines the performance of Formaldehyde device.Native system adopts metal-oxide semiconductor (MOS) as the material of senser element.Metal oxide semiconductor sensor has, the response time soon feature such as (≤10s), easy production in enormous quantities, low price highly sensitive to organic gas.Our senser element is designed to the form of eight arrays, it has eight material points, each material point can obtain a kind of gas information, eight material points just can obtain eight kinds of signals, eight kinds of signal reconstructions become a characteristic spectrum, the collection of illustrative plates in this characteristic spectrum and database is contrasted and just can identify unknown gas.
AVR single chip has prefetched instruction function, namely when an execution instruction, in advance next instruction is got into, and call instruction can be performed within a clock period; Multiple accumulator type, data processing speed is fast; AVR single chip has 32 general purpose working registers, and being equivalent to has 32 viaducts, can fast passing; Response time is fast.AVR single chip has multiple fixing interrupt vector entry address, can respond interruption fast; AVR single chip power consumption is low.For typical power consumption situation, be 100nA when WDT closes, be more suitable for battery powered application apparatus; Minimum 1.8 V of some devices get final product work; AVR single chip security performance is good.
The present invention adopts eight array metal oxide semiconductor Real-time Collection indoor formaldehyde concentrations, detects semiconductor simultaneously in real time and changes from own temperature, effectively avoid the impact that temperature is brought accuracy of detection.Heating arrangement can be adopted to heat sensor simultaneously, effectively ensure that working sensor is in optimum condition.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. one kind has the indoor formaldehyde concentration detection system of temperature compensation, it is characterized in that: comprise concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, display module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, and described display module and data transmission module are connected on the corresponding port of micro controller module;
Wherein, concentration of formaldehyde sensor, for Real-time Collection indoor formaldehyde concentration parameter;
Temperature sensor, for Real-time Collection concentration of formaldehyde sensor sheet surface temperature;
Analog-to-digital conversion module, for converting the simulating signal of concentration of formaldehyde sensor and temperature sensor collection to electric signal;
Micro controller module, for drawing indoor formaldehyde concentration according to the indoor formaldehyde concentration parameter of concentration of formaldehyde sensor collection in conjunction with the temperature parameter analysis of temperature sensor collection;
Display module, for showing the indoor formaldehyde concentration that micro controller module analysis draws in real time;
Data transmission module, the indoor formaldehyde concentration for micro controller module analysis being drawn transfers to Surveillance center and carries out remote monitoring.
2. a kind of indoor formaldehyde concentration detection system with temperature compensation according to claim 1, is characterized in that: described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors.
3. a kind of indoor formaldehyde concentration detection system with temperature compensation according to claim 1, is characterized in that: described temperature sensor adopts platinum resistance.
4. a kind of indoor formaldehyde concentration detection system with temperature compensation according to claim 1, is characterized in that: described micro controller module adopts AVR series monolithic.
5. a kind of indoor formaldehyde concentration detection system with temperature compensation according to claim 1, is characterized in that: described display module adopts LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350345.4A CN104897859A (en) | 2015-06-23 | 2015-06-23 | Indoor methanol concentration detecting system with temperature compensating function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350345.4A CN104897859A (en) | 2015-06-23 | 2015-06-23 | Indoor methanol concentration detecting system with temperature compensating function |
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| Publication Number | Publication Date |
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| CN104897859A true CN104897859A (en) | 2015-09-09 |
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| CN201510350345.4A Withdrawn CN104897859A (en) | 2015-06-23 | 2015-06-23 | Indoor methanol concentration detecting system with temperature compensating function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301054A (en) * | 2015-11-10 | 2016-02-03 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit |
| CN105424766A (en) * | 2015-11-10 | 2016-03-23 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detecting system based on radio frequency identification amplitude limiting bleeder circuit |
| CN105424754A (en) * | 2015-11-10 | 2016-03-23 | 苏州美达瑞电子有限公司 | Intelligent home formaldehyde concentration detection system based on radio frequency recognition |
| CN105424765A (en) * | 2015-11-10 | 2016-03-23 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detecting system based on radio frequency identification coupling circuit |
| CN105424753A (en) * | 2015-11-10 | 2016-03-23 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detecting system based on radio frequency identification voltage stabilizing circuit |
| CN105445327A (en) * | 2015-11-10 | 2016-03-30 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detection system based on RFID (Radio Frequency Identification) amplitude limiting detection circuit |
| CN107192742A (en) * | 2017-04-10 | 2017-09-22 | 广东工业大学 | A kind of metal-oxide gas transducer temperature drift compensation device and method |
| WO2020173099A1 (en) * | 2019-02-25 | 2020-09-03 | 珠海格力电器股份有限公司 | Formaldehyde electrochemical sensing detection apparatus, calibration method, calibration apparatus, detection method, and purifier |
| CN112180049A (en) * | 2020-10-22 | 2021-01-05 | 深圳市汇投智控科技有限公司 | Air quality sensor circuit |
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Patent Citations (5)
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| CN201488969U (en) * | 2009-10-09 | 2010-05-26 | 丁五行 | Thermostatic adiabatic system for heat-conducted gas detection |
| CN102109487A (en) * | 2009-12-28 | 2011-06-29 | 华瑞科学仪器(上海)有限公司 | Ultra-low concentration gas sensor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301054A (en) * | 2015-11-10 | 2016-02-03 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit |
| CN105424766A (en) * | 2015-11-10 | 2016-03-23 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detecting system based on radio frequency identification amplitude limiting bleeder circuit |
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| CN105445327A (en) * | 2015-11-10 | 2016-03-30 | 苏州美达瑞电子有限公司 | Indoor formaldehyde concentration detection system based on RFID (Radio Frequency Identification) amplitude limiting detection circuit |
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| WO2020173099A1 (en) * | 2019-02-25 | 2020-09-03 | 珠海格力电器股份有限公司 | Formaldehyde electrochemical sensing detection apparatus, calibration method, calibration apparatus, detection method, and purifier |
| CN112180049A (en) * | 2020-10-22 | 2021-01-05 | 深圳市汇投智控科技有限公司 | Air quality sensor circuit |
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Application publication date: 20150909 |