CN105241504A - Distributed indoor environment quality detection system - Google Patents
Distributed indoor environment quality detection system Download PDFInfo
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- CN105241504A CN105241504A CN201510669965.4A CN201510669965A CN105241504A CN 105241504 A CN105241504 A CN 105241504A CN 201510669965 A CN201510669965 A CN 201510669965A CN 105241504 A CN105241504 A CN 105241504A
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Abstract
The invention discloses a distributed indoor environment quality detection system. The system consists of a host module and multiple slave computer modules. The slave computer modules collect environment parameters around the slave computer modules, data processing is conducted by a single-chip microcomputer, and then environment parameter displaying, data recording and alarming functions are achieved. The slave computer modules receive instructions sent from a host in a wireless transmission mode, and send real-time data to the host module. The host module manages in a unified manner and monitors in real time all the slave computer modules through a communication mode of polling extension sets. The host module displays received extension set data through a display module on a panel to realize visualized monitoring for the extension set data.
Description
Technical field
The present invention relates to indoor air chemical pollution technical field, be specifically related to a kind of distributed indoor environmental quality detection system.
Background technology
Along with the plant-scale continuous expansion of China, current each metropolitan PM2.5 value can be in any more, causes severe contamination to indoor environment.To people most of the time spend in indoor in life, enjoys while more modernization is lived people, and the health problem caused because of indoor environmental quality increases severely, and cost is painful.Indoor environmental pollution material will directly affect the health of human body.Research shows that indoor environmental pollution has become one of killer of modern humans's health, and Real-Time Monitoring indoor environmental quality is very necessary.
In air quality monitoring, do reasonablely to have abroad: the PPM-400 methylene oxide detecting instrument that the 4000 type air quality analyzers that American I nterscan scientific & technical corporation produces, PPM company of Britain produce; Domestic has: " first is protected imperial " board indoor environmental pollution marking apparatus etc. that " sending auspicious " serial air health watch of Handan Peric Gas Equipment Co., Ltd.'s development, Nanchang Bei Gu Science and Technology Co., Ltd. produce.By to above-mentioned instrument comparative analysis, find that the key distinction of at present both at home and abroad product concentrates on the aspects such as the complete degree of function, accuracy of detection and Consumer's Experience, external product function ratio is more complete, measuring accuracy is high and system interaction interface phase to hommization, and domestic like product has clear superiority in price but not good enough in function singleness, Consumer's Experience.These instruments above-mentioned can realize the detection to harmful gas in air, but equipment price is expensive, and minute is longer, and portability is bad, and the professional testing staff that also needs had operates, and are difficult to METHOD FOR CONTINUOUS DETERMINATION.
Room air detector is in the market measured more single, and a measuring instrument can only detect a room air pollution factor usually.Require in national standard (GB/T18883-2002) that room area is greater than 50m2 and requires to establish 2 and above check point.Hand-held tester on market is generally that display centre and sensor assembly concentrate in together, and like this, measures and is easy to be subject to surveying instrument oneself factor (as instrument heating) impact, be difficult to accomplish accurate measurement.In addition along with the development of wireless communication technique, a lot of short-distance wireless communication module starts in intelligent home control system, therefore, use the wireless telecommunications that short-distance wireless communication module realizes between the display centre of measuring instrument and sensor assembly can realize.Highly significant based on a distributed indoor environment monitoring system being used for multiple spot, the air pollutant concentration such as the TVOC such as formaldehyde, benzene, dust granules thing in real time, comprehensively in accurate monitoring indoor environment and the meteorological factors such as humiture, carbon dioxide of above reason exploitation.
Summary of the invention
The object of the invention is to overcome prior art Problems existing, a kind of distributed indoor environmental quality detection system is provided.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of distributed indoor environmental quality detection system, this system comprises host module and is distributed in indoor from machine module, and described host module is by host SCM, and connect the host power supply module of host SCM respectively, clock module, reseting module, display module and host computer communication module composition, described from machine module by from machine single-chip microcomputer, and connect respectively from machine single-chip microcomputer from electromechanical source module, clock module, reseting module, from machine communication module, temperature and humidity measurement module, carbon monoxide measurement module, carbon dioxide measurement module, formaldehyde measurement module and PM2.5 measurement module composition, wherein, data and command transfer are given multiple from machine module by communication by described host module, describedly by communication, environmental parameter is transferred to host module by the environmental parameter around the measurement module collection that is attached thereto from machine module, described host module realized all unified managements from machine module and monitoring in real time by the communication modes of poll extension set.
Further, described host SCM adopts STC12C5A60S2 chip, for receiving each measurement data sent from machine single-chip microcomputer, described from machine single-chip microcomputer employing STC12C5A60S2 chip, measure various IAQ (indoor air quality) parameter by each sensor assembly be attached thereto, and parameter will be recorded send to host SCM.
Further, described master/slave electromechanical source module adopts AMS1117-3.3 chip and AMS1117-5.0 chip, and generation 3.3V voltage and 5V voltage are powered respectively.
Further, described reseting module is made up of an electric capacity of cross-over connection between master/slave electromechanical source module and master/slave machine monolithic processor resetting end and resistance.
Further, described display module adopts the touch color screen of TFT2.8, for showing each measurement parameter from machine module.
Further, described host computer communication module and all adopt XL4432-SMT wireless communication module from machine communication module, for carrying out wireless data communications at host SCM with between machine single-chip microcomputer.
Further, described temperature and humidity measurement module adopts DHT11 digital hygro sensor, for the humiture parameter value in measuring chamber environment.
Further, described carbon monoxide measurement module adopts ZYMQ-7 carbon monoxide survey sensor, for the carbon monoxide parameter value in measuring chamber environment, described carbon dioxide measurement module adopts MG811 carbon dioxide survey sensor, for the carbon dioxide parameter value in measuring chamber environment.
Further, described formaldehyde measurement module adopts MS1100 formaldehyde measurement sensor, for the formaldehyde parameter value in measuring chamber environment.
Further, described PM2.5 measurement module adopts GP2Y1010AU0F dust sensor, for PM2.5 parameter value in measuring chamber environment.
The invention has the beneficial effects as follows:
1, the present invention can accurately monitor multiple environmental quality parameter, comprises concentration of formaldehyde, temperature, humidity, dust concentration, CO and CO
2concentration.
2, host module and carry out data and command transfer by communication from machine module in the present invention, realizes multiple from the data communication between machine module and a host module and monitoring.
3, adopt touch-screen man-machine interface in the present invention, by touch-screen, visual control is carried out to the environmental parameter measured from machine examination.
4, the present invention is multiple spot distributed arrangement from machine module, can monitor various environmental parameters, and monitoring result more accurate and effective.
Accompanying drawing explanation
Fig. 1 is host module structural representation of the present invention;
Fig. 2 is of the present invention from machine modular structure schematic diagram;
Fig. 3 is host SCM minimum system circuit diagram;
Fig. 4 is from machine singlechip minimum system circuit figure;
Fig. 5 is+5V photovoltaic conversion circuit;
Fig. 6 is+3.3V photovoltaic conversion partial circuit;
Fig. 7 is the circuit diagram of display module;
Fig. 8 is master/slave machine communication module circuit diagram;
Fig. 9 is temperature and humidity measurement circuit diagram;
Figure 10 is carbon monoxide metering circuit figure;
Figure 11 is carbon dioxide metering circuit figure;
Figure 12 is formaldehyde measurement circuit diagram;
Figure 13 is PM2.5 metering circuit;
Figure 14 is host module control flow chart;
Figure 15 is TFT2.8 touch-screen control flow chart;
Figure 16 is from machine module control flow chart;
Figure 17 is temperature and humidity measurement process flow diagram from machine module;
Figure 18 is AD conversion process flow diagram from machine module;
Figure 19 is master/slave machine module wireless transmission control flow chart;
Figure 20 is master/slave machine module wireless receiving control flow chart.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
As depicted in figs. 1 and 2, a kind of distributed indoor environmental quality detection system, this system comprises host module and is distributed in indoor from machine module, and described host module is by host SCM, and connect the host power supply module of host SCM respectively, clock module, reseting module, display module and host computer communication module composition, described from machine module by from machine single-chip microcomputer, and connect respectively from machine single-chip microcomputer from electromechanical source module, clock module, reseting module, from machine communication module, temperature and humidity measurement module, carbon monoxide measurement module, carbon dioxide measurement module, formaldehyde measurement module and PM2.5 measurement module composition, wherein, data and command transfer are given multiple from machine module by communication by described host module, describedly by communication, environmental parameter is transferred to host module by the environmental parameter around the measurement module collection that is attached thereto from machine module, described host module realized all unified managements from machine module and monitoring in real time by the communication modes of poll extension set.
Described host SCM adopts STC12C5A60S2 chip, for receiving each measurement data sent from machine single-chip microcomputer, described from machine single-chip microcomputer employing STC12C5A60S2 chip, various IAQ (indoor air quality) parameter is measured by each sensor assembly be attached thereto, and parameter will be recorded send to host SCM, described reseting module is made up of an electric capacity of cross-over connection between master/slave electromechanical source module and master/slave machine monolithic processor resetting end and resistance, in the present embodiment, as shown in Figure 3 and Figure 4, be respectively host SCM and the singlechip minimum system circuit from machine single-chip microcomputer, the clock circuit of two systems is internal oscillator mode, oscillating capacitance value is 30pF, crystal oscillator selects 18.432MHz.
Described master/slave electromechanical source module adopts AMS1117-3.3 chip and AMS1117-5.0 chip, generation 3.3V voltage and 5V voltage are powered respectively, as Fig. 5, + 12V voltage carries out the first order power by converting+5V voltage after AMS1117-5.0 to, as Fig. 6, + 5V voltage, by converting+3.3V voltage after AMS1117-3.3 to, produces 3.3V voltage and powers.
Described display module adopts the touch color screen of TFT2.8, can realize man-machine interface preferably, for showing each measurement parameter from machine module, as shown in Figure 7, is the circuit diagram of display module.
Described host computer communication module and all adopt XL4432-SMT wireless communication module from machine communication module, for carrying out wireless data communications at host SCM with between machine single-chip microcomputer, host module and carry out data transmission by wireless communication module XL4432-SMT between machine module in the present embodiment, adopt SPI interface mode, block size adopts 17*16.5mm, the single contact pin interface of 1.27mm spacing, employing external antenna designs, under the 1.2K speed of open ground, the data volume measuring distance of transmitting-receiving 10 bytes can reach 1200 meters farthest, based on this communication module radio communication circuit as shown in Figure 8.
Described temperature and humidity measurement module adopts DHT11 digital hygro sensor, for the humiture parameter value in measuring chamber environment, in the present embodiment, first each DHT11 sensor is calibrated in very accurate humidity verification room, calibration factor is stored in OTP internal memory with the form of program, and sensor internal will call these calibration factors in the processing procedure of detection signal, and the present embodiment adopts the single pin package of 4 pin, easy to connect, temperature and humidity measurement circuit as shown in Figure 9.
Described carbon monoxide measurement module adopts ZYMQ-7 carbon monoxide survey sensor, for the carbon monoxide parameter value in measuring chamber environment, in the present embodiment, as shown in Figure 10, for carbon monoxide metering circuit, the gas sensor of carbon monoxide survey sensor is provided with 6 needle-like pins, and wherein 4 export for signal, and 2 for providing heating current.Described carbon dioxide measurement module adopts MG811 carbon dioxide survey sensor, for the carbon dioxide parameter value in measuring chamber environment, as shown in figure 11, for carbon dioxide metering circuit, its element heating voltage is provided by external circuit, when its surface temperature is enough high, element is equivalent to a battery, its two ends can export a voltage signal, its value and Nernst equation meet better, when element is measured, the impedance of amplifier must between 100-1000G Ω, and its measuring current should control at below 1pA.
Described formaldehyde measurement module adopts MS1100 formaldehyde measurement sensor, for the formaldehyde parameter value in measuring chamber environment, as shown in figure 12, is the formaldehyde measurement circuit of the present embodiment.
Described PM2.5 measurement module adopts GP2Y1010AU0F dust sensor, for PM2.5 parameter value in measuring chamber environment, as shown in figure 13, is PM2.5 metering circuit in the present embodiment.
As shown in figure 14, host module master routine mainly completes the controlling functions of host module, after start energising, first carry out initialization, then enter the main interface of main frame, host interface has various function membrane keyboard, when touching certain function key, entering this function interface and performing corresponding function.
As shown in figure 15, the main frame display module of native system selects TFT2.8 color screen, utilizes this color screen can show each measurement parameter from machine, and has touch function, realize good man-machine interface.After energising, first carry out the initialization of TFT, then initialization touch controller, next can show initial man-machine interface, can touch key-press be selected under this interface, enter into corresponding function interface, perform corresponding function.
As shown in figure 16, the controlling functions from machine module is mainly completed from machine module master routine, utilize various sensor to record each indoor environment parameter value from the main task of machine module, and by parameters value by sending to host module to monitor from machine communication module.
As shown in figure 17, utilize DHT11 sensor measurement humiture parameter from machine module, DHT11 adopts single bus data form, communication time an about 4ms, data divide fraction part and integral part, and concrete form is described below, current fraction part is used for expansion later, now reads as zero.Operating process is as follows: once complete data are transmitted as 40bit, and a high position first goes out.
Data layout: 8bit humidity integer data+8bit humidity fraction data+8bi temperature integer data+8bit temperature fraction data+8bit School Affairs
When data transmit correct, School Affairs data equal 8, the end of " 8bit humidity integer data+8bit humidity fraction data+8bi temperature integer data+8bit temperature fraction data " acquired results.After DHT11 receives the commencing signal of host module, wait for that host module commencing signal terminates, then send 80us low level response signal.After host module transmission commencing signal terminates, after 20-40us is waited in time delay, read the response signal of DHT11, host module can be switched to input pattern after sending commencing signal, or exports high level, and bus is drawn high by pull-up resistor.
As shown in figure 18, from machine module, the measurement of carbon monoxide, carbon dioxide, formaldehyde and PM2.5 is issued single-chip microcomputer after all needing the data AD conversion recorded by sensor and is processed.The present invention selects single-chip microcomputer to carry AD.STC12 series monolithic carries A/D and changes mouth at P1 mouth (P1.0-P1.7), and have 10,8 tunnel high-speed a/d converter, speed can reach 250KHz.After electrification reset, P1 mouth is weak pull-up type I/O mouth, and any road in 8 tunnels can be set to A/D conversion by software design patterns by user, does not need the mouth used as A/D can continue to use as I/O mouth.
As illustrated in figures 19 and 20, host module of the present invention and carry out data communication by wireless communication module XL4432_SMT between machine module.The programming of master/slave machine communication module adopts modular design method, and in system, each main functional modules is all weaved into independently function and called by master routine.Functional module comprises: initialize routine (comprising initialization SPI and XL4432), wireless transmission program, wireless receiving program etc.Wireless transmission program is responsible for writing data, and is that data add lead code, synchronization character, data length and CRC check byte according to communication protocol, forms packet and is sent; Wireless receiving program be responsible for receive and check data bag in CRC byte, to guarantee the correctness of the data received.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a distributed indoor environmental quality detection system, is characterized in that, this system comprises host module and is distributed in indoor from machine module, and described host module is by host SCM, and connect the host power supply module of host SCM respectively, clock module, reseting module, display module and host computer communication module composition, described from machine module by from machine single-chip microcomputer, and connect respectively from machine single-chip microcomputer from electromechanical source module, clock module, reseting module, from machine communication module, temperature and humidity measurement module, carbon monoxide measurement module, carbon dioxide measurement module, formaldehyde measurement module and PM2.5 measurement module composition, wherein, data and command transfer are given multiple from machine module by communication by described host module, describedly by communication, environmental parameter is transferred to host module by the environmental parameter around the measurement module collection that is attached thereto from machine module, described host module realized all unified managements from machine module and monitoring in real time by the communication modes of poll extension set.
2. distributed indoor environmental quality detection system according to claim 1, it is characterized in that, described host SCM adopts STC12C5A60S2 chip, for receiving each measurement data sent from machine single-chip microcomputer, described from machine single-chip microcomputer employing STC12C5A60S2 chip, measure various IAQ (indoor air quality) parameter by each sensor assembly be attached thereto, and parameter will be recorded send to host SCM.
3. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described master/slave electromechanical source module adopts AMS1117-3.3 chip and AMS1117-5.0 chip, and generation 3.3V voltage and 5V voltage are powered respectively.
4. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described reseting module is made up of an electric capacity of cross-over connection between master/slave electromechanical source module and master/slave machine monolithic processor resetting end and resistance.
5. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described display module adopts the touch color screen of TFT2.8, for showing each measurement parameter from machine module.
6. distributed indoor environmental quality detection system according to claim 1, it is characterized in that, described host computer communication module and all adopt XL4432-SMT wireless communication module from machine communication module, for carrying out wireless data communications at host SCM with between machine single-chip microcomputer.
7. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described temperature and humidity measurement module adopts DHT11 digital hygro sensor, for the humiture parameter value in measuring chamber environment.
8. distributed indoor environmental quality detection system according to claim 1, it is characterized in that, described carbon monoxide measurement module adopts ZYMQ-7 carbon monoxide survey sensor, for the carbon monoxide parameter value in measuring chamber environment, described carbon dioxide measurement module adopts MG811 carbon dioxide survey sensor, for the carbon dioxide parameter value in measuring chamber environment.
9. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described formaldehyde measurement module adopts MS1100 formaldehyde measurement sensor, for the formaldehyde parameter value in measuring chamber environment.
10. distributed indoor environmental quality detection system according to claim 1, is characterized in that, described PM2.5 measurement module adopts GP2Y1010AU0F dust sensor, for PM2.5 parameter value in measuring chamber environment.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514720A (en) * | 2016-01-21 | 2016-04-20 | 苏州经贸职业技术学院 | Intelligent socket group control system based on internet of things |
| CN107991957A (en) * | 2017-12-08 | 2018-05-04 | 郑州云海信息技术有限公司 | A kind of server room dynamic environment management system based on CPLD |
| CN108931269A (en) * | 2018-06-28 | 2018-12-04 | 广东技术师范学院 | A kind of wireless humiture acquisition system |
| CN109443422A (en) * | 2018-09-27 | 2019-03-08 | 北京金茂绿建科技有限公司 | The majority of distributed sensor is according to centralized displaying method |
| CN109521151A (en) * | 2017-09-19 | 2019-03-26 | 北京迪文科技有限公司 | A kind of human-computer interaction device that realizing air quality monitoring and method |
| CN109813374A (en) * | 2019-01-18 | 2019-05-28 | 西南石油大学 | Distributed indoor environment monitoring system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101981U (en) * | 2013-03-01 | 2013-07-31 | 四川久远新方向智能科技有限公司 | Environmental monitoring system |
| CN203164721U (en) * | 2013-03-13 | 2013-08-28 | 安徽工程大学 | Indoor environment monitoring device |
| CN103969297A (en) * | 2014-05-09 | 2014-08-06 | 苏州经贸职业技术学院 | Indoor CO concentration detector |
| CN203849243U (en) * | 2014-04-17 | 2014-09-24 | 中康韦尔(保定)环境科技有限公司 | System for detecting quality of outdoor air |
| CN104075753A (en) * | 2014-05-05 | 2014-10-01 | 林聪� | Multifunctional environment measuring instrument |
| CN104330175A (en) * | 2014-10-21 | 2015-02-04 | 苏州德鲁森自动化系统有限公司 | Real-time community environment temperature monitoring system |
| CN104330528A (en) * | 2014-10-22 | 2015-02-04 | 上海纳普信息科技有限公司 | Harmful gas monitoring system based on wireless technology |
| CN204666191U (en) * | 2015-05-07 | 2015-09-23 | 广西壮族自治区环境保护科学研究院 | A kind of indoor environment monitoring system |
| CN205066815U (en) * | 2015-10-16 | 2016-03-02 | 苏州经贸职业技术学院 | Indoor environmental quality detecting system of distributing type |
-
2015
- 2015-10-16 CN CN201510669965.4A patent/CN105241504A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101981U (en) * | 2013-03-01 | 2013-07-31 | 四川久远新方向智能科技有限公司 | Environmental monitoring system |
| CN203164721U (en) * | 2013-03-13 | 2013-08-28 | 安徽工程大学 | Indoor environment monitoring device |
| CN203849243U (en) * | 2014-04-17 | 2014-09-24 | 中康韦尔(保定)环境科技有限公司 | System for detecting quality of outdoor air |
| CN104075753A (en) * | 2014-05-05 | 2014-10-01 | 林聪� | Multifunctional environment measuring instrument |
| CN103969297A (en) * | 2014-05-09 | 2014-08-06 | 苏州经贸职业技术学院 | Indoor CO concentration detector |
| CN104330175A (en) * | 2014-10-21 | 2015-02-04 | 苏州德鲁森自动化系统有限公司 | Real-time community environment temperature monitoring system |
| CN104330528A (en) * | 2014-10-22 | 2015-02-04 | 上海纳普信息科技有限公司 | Harmful gas monitoring system based on wireless technology |
| CN204666191U (en) * | 2015-05-07 | 2015-09-23 | 广西壮族自治区环境保护科学研究院 | A kind of indoor environment monitoring system |
| CN205066815U (en) * | 2015-10-16 | 2016-03-02 | 苏州经贸职业技术学院 | Indoor environmental quality detecting system of distributing type |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514720A (en) * | 2016-01-21 | 2016-04-20 | 苏州经贸职业技术学院 | Intelligent socket group control system based on internet of things |
| CN109521151A (en) * | 2017-09-19 | 2019-03-26 | 北京迪文科技有限公司 | A kind of human-computer interaction device that realizing air quality monitoring and method |
| CN107991957A (en) * | 2017-12-08 | 2018-05-04 | 郑州云海信息技术有限公司 | A kind of server room dynamic environment management system based on CPLD |
| CN108931269A (en) * | 2018-06-28 | 2018-12-04 | 广东技术师范学院 | A kind of wireless humiture acquisition system |
| CN109443422A (en) * | 2018-09-27 | 2019-03-08 | 北京金茂绿建科技有限公司 | The majority of distributed sensor is according to centralized displaying method |
| CN109813374A (en) * | 2019-01-18 | 2019-05-28 | 西南石油大学 | Distributed indoor environment monitoring system |
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