CN105067765A - Air quality monitoring system - Google Patents
Air quality monitoring system Download PDFInfo
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- CN105067765A CN105067765A CN201510444242.4A CN201510444242A CN105067765A CN 105067765 A CN105067765 A CN 105067765A CN 201510444242 A CN201510444242 A CN 201510444242A CN 105067765 A CN105067765 A CN 105067765A
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Abstract
The invention relates to an air quality monitoring system, which is characterized by comprising: 1, a sensor for detecting air temperature, humidity and dust particle concentration; 2, a temperature detection circuit for converting the temperature signal detected by the sensor into an electric signal; 3, a humidity detection circuit for converting the humidity signal detected by the sensor into an electric signal; 4, a dust particle detection circuit for converting the dust particle signal detected by the sensor into an electrical signal; 5, a controller for processing the electrical signals transmitted by the detection circuit and transmitting to a VFD display device; 6, a RS232 interface for connecting to the controller and a PC machine; 7, the PC machine for setting and storing related parameters; and 8, the VFD display device for real-timely displaying the air quality value, wherein the sensor is connected to the temperature detection circuit, the humidity detection circuit and the dust particle detection circuit, and the controller is connected to the VFD display device and the RS232.
Description
Technical field
The present invention relates to Detection of Air Quality field, particularly a kind of air-quality monitoring system.
Background technology
China's air pollution problems inherent is relatively more serious, causes government's enough attention, and strengthens air-polluting detection and control, the present invention proposes a kind of air-quality monitoring system, Real-Time Monitoring air quality.
Summary of the invention
The present invention adopts following technical scheme:
A kind of air-quality monitoring system, it is characterized in that, it comprises: sensor, detects air themperature, humidity, dust particle concentration; Temperature sensing circuit, converts electric signal to the temperature signal that sensor detects; Humidity measuring circuit, converts electric signal to the moisture signal that sensor detects; Dust particle testing circuit, converts electric signal to the dust particle signal that sensor detects; Controller, the electric signal that process testing circuit transmits also flows to VFD display device; RS232 interface, connection control device and PC; PC, arranges and stores correlation parameter; VFD display device, in real time display air quality numerical value; Described sensor is connected with described temperature sensing circuit, humidity measuring circuit, dust particle testing circuit; Described controller is connected with VFD display device, RS232.
Preferably, Atmel company single-chip microcomputer selected by described controller, and model selects ATC89C55WD.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, a kind of air-quality monitoring system, is characterized in that, it comprises: 1, sensor, detects air themperature, humidity, dust particle concentration; 2, temperature sensing circuit, converts electric signal to the temperature signal that sensor detects; 3, humidity measuring circuit, converts electric signal to the moisture signal that sensor detects; 4, dust particle testing circuit, converts electric signal to the dust particle signal that sensor detects; 5, controller, the electric signal that process testing circuit transmits also flows to VFD display device; 6, RS232 interface, connection control device and PC; 7, PC, arranges and stores correlation parameter; 8, VFD display device, in real time display air quality numerical value; Described sensor is connected with described temperature sensing circuit, humidity measuring circuit, dust particle testing circuit; Described controller is connected with VFD display device, RS232.
A kind of air-quality monitoring system detects ambient air situation, and can send control signal by function element to the periphery.And how accurately, reliably testing environment air quality indexes be the key of whole system work.The present invention realizes following function:
1) by sensing circuit, environment temperature, humidity, cleanliness factor (dust particle quantity) 3 air quality indexes are detected;
2) vacuum fluorescent display screen (VFD) is adopted above-mentioned air quality indexes data to be shown in real time;
3) according to detection data, each index is judged, thus sends corresponding control signal.Peripheral function circuit makes respective electric control action according to these signals, controls in relatively more suitable scope by the temperature of air, humidity, dust particle concentration;
4) at every turn test 3 kinds of air quality data are passed to upper PC; Also these data can be stored in EEPROM simultaneously, if temporarily do not connect upper PC, also in connection sometime after this, detection history data can be checked.
As shown in Figure 1, peripheral components we mainly adopt bus to connect, temperature survey, EEPROM and clock circuit are all on the bus plug-in.Due in bus, all devices are connected by two lines (serial data line SDA and serial time clock line SCL), so both fully can save single-chip microcomputer pin resource, and also can carry out independently circuit design to the device blocks in bus, simplify system.Further, removing from system or increasing integrated chip does not affect other chips in bus, is convenient to product remodeling or upgrading.
Adopt the AT89C55WD microcontroller chip of atmel corp, this single-chip microcomputer, with outside MCS-51 compatibility, has following main inside resource in addition: the programmable FLASH program storage ROM space 1) providing 20K, can repeat erasable number of times and reach 1000 times.In this programme, because program function module is more, and the character library space of display module is comparatively large, therefore needs comparatively large program space, selects AT89C55WD chip, can add external ROM.2) hardware watchdog timer is carried.In actual applications, watchdog circuit be absolutely necessary electromagnetism interference, prevent software from entering the hardware circuit of endless loop.Activate the watchdog function of AT89C55WD, 01EH and 0E1H is sequentially written in corresponding special function register WDTRST.Watchdog function is exactly the moment that house dog register is cleared when activating.Once watchdog function is activated, WatchDog Timer will add 1 in each machine cycle, until counting is more than 8191, produces after overflowing single-chip microcomputer hardware reset.After resetting, watchdog function is stopped, and counts from zero again until perform WatchDog Timer when activating statement.Above-mentioned single-chip microcomputer additional resource, reduces the complicacy of circuit, also saves cost simultaneously.
Sensing circuit comprises three testing circuit parts, realizes the measurement of temperature, humidity and dust particle concentration respectively.
(1) temperature sensing circuit
Adopt the AD7416 digital temperature sensing chip that ANALOGDEVICE company produces, 10 bit digital export.。The temperature measurement range of this chip is very wide, for :-55 DEG C ~+125 DEG C.
(2) humidity measuring circuit
Adopt the RH control module of rate-adaptive pacemaker, along with the rising of humidity, the output frequency of modular circuit linearly reduces.
This module work temperature range is :-30 DEG C ~ 80 DEG C, measures humidity range to be: 10 ~ 95%RH, and directly can carry out interface with single-chip microcomputer, and single-chip microcomputer utilizes the counting to its frequency, by simple conversion, just can obtain the humidity value of air.
(3) dust particle concentration testing circuit
This circuit comprises Laser emission part and photosensitive circuit part, and photosensitive circuit and Laser emission direction are certain drift angle.When the air of certain flow passes through between Laser emission part and photosensitive circuit, dust particle in air can by light reflection certain angle, so just have optical pulse irradiation to the photosensitive part accepting circuit, dust particle is more, the light pulse reflexing to photosensitive part is more, exports so produce corresponding potential pulse.Single-chip microcomputer, to after potential pulse counting, through certain calculating, then obtains the dust particle concentration in air.
Adopt VFD display screen (display of 128X64 point formation).VFD and vacuum fluorescent display screen, be the one of pliotron, negative electrode, anode and grid are enclosed in the glass container of high vacuum, and after energising, emission of cathode goes out electron bombardment fluorescent powder, make it luminous.Compared with traditional LCDs, it is a kind of self light emitting, has high brightness, and visual angle is large, the feature that sharpness is good; It is also that a kind of CPU can the modular product of Direct driver, in use, directly can carry out write operation to the corresponding internal storage of display dot matrix, control 8 points in a certain address place everybody light with do not work, like this, the circuit design work of user in display and control can be greatly reduced.Adopt the multiple dot array display screen of 128x64 point, interface flexibly can be realized, such as can show in product brand pattern wherein a picture.
At present along with the concept of living space and amusement, stadiums etc. being carried out to environmental monitoring is proposed gradually.Can this electrical system be utilized, RS232 serial ports is transformed into RS485 or other field-bus interfaces are connected with center control PC, just can realize above-mentioned intelligentized control.
A kind of air-quality monitoring system that the embodiment of the present invention provides is described in detail; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; all will change in specific embodiments and applications; in sum; this description should not be construed as the restriction to invention, and all any changes made according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (1)
1. an air-quality monitoring system, is characterized in that, it comprises: sensor, detects air themperature, humidity, dust particle concentration; Temperature sensing circuit, converts electric signal to the temperature signal that sensor detects; Humidity measuring circuit, converts electric signal to the moisture signal that sensor detects; Dust particle testing circuit, converts electric signal to the dust particle signal that sensor detects; Controller, the electric signal that process testing circuit transmits also flows to VFD display device; RS232 interface, connection control device and PC; PC, arranges and stores correlation parameter; VFD display device, in real time display air quality numerical value; Described sensor is connected with described temperature sensing circuit, humidity measuring circuit, dust particle testing circuit; Described controller is connected with VFD display device, RS232.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510444242.4A CN105067765A (en) | 2015-07-27 | 2015-07-27 | Air quality monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510444242.4A CN105067765A (en) | 2015-07-27 | 2015-07-27 | Air quality monitoring system |
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| CN105067765A true CN105067765A (en) | 2015-11-18 |
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| CN201510444242.4A Pending CN105067765A (en) | 2015-07-27 | 2015-07-27 | Air quality monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445157A (en) * | 2015-12-17 | 2016-03-30 | 常熟市矿山机电器材有限公司 | Air quality monitoring system |
| CN105572009A (en) * | 2016-03-09 | 2016-05-11 | 丁云广 | Air quality tester based on PC (Personal Computer) |
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| WO2007104240A1 (en) * | 2006-03-10 | 2007-09-20 | Sui-Chun Law | An environmental monitoring apparatus and method thereof |
| CN201600358U (en) * | 2009-12-07 | 2010-10-06 | 邯郸派瑞电器有限公司 | Air quality monitor with functions of digital album |
| CN201662447U (en) * | 2009-05-08 | 2010-12-01 | 中国船舶重工集团公司第七一八研究所 | Indoor air quality tester |
| CN203414451U (en) * | 2013-07-12 | 2014-01-29 | 绍兴县柯桥中学 | Portable air quality detection instrument |
| CN104122370A (en) * | 2014-06-27 | 2014-10-29 | 肇庆学院 | Wireless community-based air disease surveillance and prevention health care system |
| CN104596903A (en) * | 2015-01-05 | 2015-05-06 | 上海应用技术学院 | Solar energy-based PM2.5 detection system |
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2015
- 2015-07-27 CN CN201510444242.4A patent/CN105067765A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007104240A1 (en) * | 2006-03-10 | 2007-09-20 | Sui-Chun Law | An environmental monitoring apparatus and method thereof |
| CN201662447U (en) * | 2009-05-08 | 2010-12-01 | 中国船舶重工集团公司第七一八研究所 | Indoor air quality tester |
| CN201600358U (en) * | 2009-12-07 | 2010-10-06 | 邯郸派瑞电器有限公司 | Air quality monitor with functions of digital album |
| CN203414451U (en) * | 2013-07-12 | 2014-01-29 | 绍兴县柯桥中学 | Portable air quality detection instrument |
| CN104122370A (en) * | 2014-06-27 | 2014-10-29 | 肇庆学院 | Wireless community-based air disease surveillance and prevention health care system |
| CN104596903A (en) * | 2015-01-05 | 2015-05-06 | 上海应用技术学院 | Solar energy-based PM2.5 detection system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445157A (en) * | 2015-12-17 | 2016-03-30 | 常熟市矿山机电器材有限公司 | Air quality monitoring system |
| CN105572009A (en) * | 2016-03-09 | 2016-05-11 | 丁云广 | Air quality tester based on PC (Personal Computer) |
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Application publication date: 20151118 |
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