CN105301054A - Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit - Google Patents
Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit Download PDFInfo
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- CN105301054A CN105301054A CN201510757032.0A CN201510757032A CN105301054A CN 105301054 A CN105301054 A CN 105301054A CN 201510757032 A CN201510757032 A CN 201510757032A CN 105301054 A CN105301054 A CN 105301054A
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Abstract
The invention discloses an indoor formaldehyde concentration detection system based on a radio frequency identification commutating and voltage-stabilizing circuit. The indoor formaldehyde concentration detection system comprises a formaldehyde concentration sensor, a temperature sensor, an analog-digital conversion module, a microcontroller module, a display module and a data transmission module, the formaldehyde concentration sensor and the temperature sensor are connected with the microcontroller module through the analog-digital conversion 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 the indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit, 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 indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on the indoor formaldehyde concentration detection system of radio-frequency (RF) identification regulator rectifier circuit, comprise monitor terminal and connected concentration of formaldehyde sense terminals, described monitor terminal comprises main controller module and connected display module and radio frequency identification module, described concentration of formaldehyde sense terminals comprises concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, described data transmission module is connected on the corresponding port of micro controller module,
Described radio frequency identification module comprises a regulator rectifier circuit, and described regulator rectifier circuit comprises coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit, circuit mu balanced circuit; Described coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit connect successively, and described circuit mu balanced circuit is connected with amplitude limit bleeder circuit, circuit mu balanced circuit respectively, and described coupled circuit is for being coupled to radio frequency identification module by input signal; Described amplitude limit testing circuit is for detecting the voltage amplitude after rectification; Described amplitude limit bleeder circuit is for unnecessary current drain of releasing; Described mu balanced circuit for carry out voltage stabilizing process, stable output supply voltage for other circuit 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;
Data transmission module, transfers to monitor terminal for indoor formaldehyde concentration micro controller module analysis drawn;
Radio frequency identification module, for identifying and receive the indoor formaldehyde concentration that micro controller module sends;
Display module, for showing the indoor formaldehyde concentration of radio frequency identification module identification and reception.
As the further preferred version of indoor formaldehyde concentration detection system that the present invention is based on radio-frequency (RF) identification regulator rectifier circuit, described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors.
As the further preferred version of indoor formaldehyde concentration detection system that the present invention is based on radio-frequency (RF) identification regulator rectifier circuit, the chip model of described temperature sensor is DS18B20.
As the further preferred version of indoor formaldehyde concentration detection system that the present invention is based on radio-frequency (RF) identification regulator rectifier circuit, described micro controller module adopts AVR series monolithic.
As the further preferred version of indoor formaldehyde concentration detection system that the present invention is based on radio-frequency (RF) identification regulator rectifier circuit, 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, based on the indoor formaldehyde concentration detection system of radio-frequency (RF) identification regulator rectifier circuit, comprise monitor terminal and connected concentration of formaldehyde sense terminals, described monitor terminal comprises main controller module and connected display module and radio frequency identification module, described concentration of formaldehyde sense terminals comprises concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, described data transmission module is connected on the corresponding port of micro controller module,
Described radio frequency identification module comprises a regulator rectifier circuit, and described regulator rectifier circuit comprises coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit, circuit mu balanced circuit; Described coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit connect successively, and described circuit mu balanced circuit is connected with amplitude limit bleeder circuit, circuit mu balanced circuit respectively, and described coupled circuit is for being coupled to radio frequency identification module by input signal; Described amplitude limit testing circuit is for detecting the voltage amplitude after rectification; Described amplitude limit bleeder circuit is for unnecessary current drain of releasing; Described mu balanced circuit for carry out voltage stabilizing process, stable output supply voltage for other circuit 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;
Data transmission module, transfers to monitor terminal for indoor formaldehyde concentration micro controller module analysis drawn;
Radio frequency identification module, for identifying and receive the indoor formaldehyde concentration that micro controller module sends;
Display module, for showing the indoor formaldehyde concentration of radio frequency identification module identification and reception.
Wherein, described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors, and the chip model of described temperature sensor is DS18B20, and described micro controller module adopts AVR series monolithic, and 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, response time highly sensitive to organic gas fast, easy feature such as production in enormous quantities, low price.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; The minimum 1.8V of some devices gets 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 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. based on the indoor formaldehyde concentration detection system of radio-frequency (RF) identification regulator rectifier circuit, it is characterized in that: comprise monitor terminal and connected concentration of formaldehyde sense terminals, described monitor terminal comprises main controller module and connected display module and radio frequency identification module, described concentration of formaldehyde sense terminals comprises concentration of formaldehyde sensor, temperature sensor, analog-to-digital conversion module, micro controller module, data transmission module, described concentration of formaldehyde sensor is connected micro controller module with temperature sensor respectively by analog-to-digital conversion module, described data transmission module is connected on the corresponding port of micro controller module,
Described radio frequency identification module comprises a regulator rectifier circuit, and described regulator rectifier circuit comprises coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit, circuit mu balanced circuit; Described coupled circuit, amplitude limit testing circuit, amplitude limit bleeder circuit connect successively, and described circuit mu balanced circuit is connected with amplitude limit bleeder circuit, circuit mu balanced circuit respectively, and described coupled circuit is for being coupled to radio frequency identification module by input signal; Described amplitude limit testing circuit is for detecting the voltage amplitude after rectification; Described amplitude limit bleeder circuit is for unnecessary current drain of releasing; Described mu balanced circuit for carry out voltage stabilizing process, stable output supply voltage for other circuit 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;
Data transmission module, transfers to monitor terminal for indoor formaldehyde concentration micro controller module analysis drawn;
Radio frequency identification module, for identifying and receive the indoor formaldehyde concentration that micro controller module sends;
Display module, for showing the indoor formaldehyde concentration of radio frequency identification module identification and reception.
2. the indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit according to claim 1, is characterized in that: described concentration of formaldehyde sensor adopts eight array metal oxide semiconductors.
3. the indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit according to claim 1, is characterized in that: the chip model of described temperature sensor is DS18B20.
4. the indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit according to claim 1, is characterized in that: described micro controller module adopts AVR series monolithic.
5. the indoor formaldehyde concentration detection system based on radio-frequency (RF) identification regulator rectifier circuit according to claim 1, is characterized in that: described display module adopts LCD display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510757032.0A CN105301054A (en) | 2015-11-10 | 2015-11-10 | Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit |
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| CN201510757032.0A CN105301054A (en) | 2015-11-10 | 2015-11-10 | Indoor formaldehyde concentration detection system based on radio frequency identification commutating and voltage-stabilizing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105784606A (en) * | 2016-04-28 | 2016-07-20 | 无锡昊瑜节能环保设备有限公司 | Optical property based water quality monitoring system |
| CN105954204A (en) * | 2016-04-28 | 2016-09-21 | 无锡昊瑜节能环保设备有限公司 | Radio frequency identification-based optical property water quality monitoring system |
| CN108282115A (en) * | 2018-03-27 | 2018-07-13 | 新日(无锡)发展有限公司 | A kind of electric vehicle motor controller based on TL494 chips |
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| CN201273887Y (en) * | 2008-08-27 | 2009-07-15 | 王宽喜 | Intelligent multifunctional gas detector |
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Application publication date: 20160203 |