CN204649223U - Portable air quality detection device - Google Patents
Portable air quality detection device Download PDFInfo
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- CN204649223U CN204649223U CN201520193551.4U CN201520193551U CN204649223U CN 204649223 U CN204649223 U CN 204649223U CN 201520193551 U CN201520193551 U CN 201520193551U CN 204649223 U CN204649223 U CN 204649223U
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- chip microcomputer
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- formaldehyde
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Abstract
The utility model relates to portable air quality detection device, comprise PM2.5 detection module, formaldehyde sensor, Temperature Humidity Sensor, single-chip microcomputer, liquid crystal display and power transfer module, PM2.5 detection module comprises infrared receiving tube, infrared transmitting tube and operational amplifier, detector tube is provided with between infrared receiving tube and infrared transmitting tube, the input end of the output terminal concatenation operation amplifier of infrared receiving tube, the output terminal of operational amplifier connects the first input end of single-chip microcomputer, Temperature Humidity Sensor is connected with single-chip microcomputer by I2C bus, the output terminal of formaldehyde sensor connects the second input end of single-chip microcomputer, the input end of the output terminal connecting fluid crystal display of single-chip microcomputer, the power end of infrared receiving tube, the power end of infrared transmitting tube, the power end of single-chip microcomputer, the power end of operational amplifier, the power end of liquid crystal display, the power end of formaldehyde sensor is connected power transfer module respectively with the power end of Temperature Humidity Sensor.
Description
Technical field
The utility model belongs to the air detecting device of PM2.5, formaldehyde, humiture, is specifically related to portable air quality detection device.
Background technology
Society is along with the development of society, and air-polluting problem is day by day serious.And meanwhile, along with the progress of people's living standard, people also more and more focus on the quality of the air oneself breathed.On Vehicles Collected from Market, existing air quality detecting device is as Han Wang N1 and air fruit etc., although have employed WiFi and ZigBee technology and be integrated with numerous sensors, can realize the detection to nuisances such as formaldehyde in air, but its price is all on 900 yuan, very expensive, general public can not consumed, based on above situation, it is human-oriented that we have devised a kind of price, portable novel air pick-up unit.
Utility model content
For the deficiencies in the prior art, the utility model proposes portable air quality detection device.
Technical solutions of the utility model are as follows:
A kind of portable air quality detection device, comprises PM2.5 detection module, formaldehyde sensor, Temperature Humidity Sensor, single-chip microcomputer, liquid crystal display and power transfer module;
Described PM2.5 detection module comprises infrared receiving tube, infrared transmitting tube and operational amplifier;
Detector tube is provided with between described infrared receiving tube and infrared transmitting tube, the input end of the output terminal concatenation operation amplifier of infrared receiving tube, the output terminal of operational amplifier connects the first input end of single-chip microcomputer, Temperature Humidity Sensor is connected with single-chip microcomputer by I2C bus, the output terminal of formaldehyde sensor connects the second input end of single-chip microcomputer, the input end of the output terminal connecting fluid crystal display of single-chip microcomputer, the power end of infrared receiving tube, the power end of infrared transmitting tube, the power end of single-chip microcomputer, the power end of operational amplifier, the power end of liquid crystal display, the power end of formaldehyde sensor is connected power transfer module respectively with the power end of Temperature Humidity Sensor, power transfer module external power supply,
Described PM2.5 detection module, for detecting the concentration of particulate in air, and is sent to single-chip microcomputer;
Described infrared receiving tube and infrared transmitting tube, for by launching, receiving infrared signal, be converted to voltage signal by the concentration of the particle detected in air;
Described operational amplifier, for amplifying the voltage signal of infrared receiving tube and being sent to single-chip microcomputer, prevents undesired signal simultaneously;
Described Temperature Humidity Sensor, for detecting the temperature and humidity in air, and is sent to single-chip microcomputer;
Described formaldehyde sensor, for detecting the concentration of the formaldehyde in air, and is sent to single-chip microcomputer;
Described single-chip microcomputer, for being converted to digital signal by the simulating signal of PM2.5 detection module and formaldehyde sensor transmission;
Described power transfer module, for converting the magnitude of voltage needed for infrared receiving tube, infrared transmitting tube, single-chip microcomputer, operational amplifier, the power end of liquid crystal display, formaldehyde sensor and Temperature Humidity Sensor to, and to its power supply by supply voltage;
Described LCDs, for showing the temperature of air, humidity, the concentration of formaldehyde and the concentration of particulate in air;
Detector tube between described infrared receiving tube and infrared transmitting tube is folding shape, and its bending angle is 100 ° ~ 150 °, and the bending place of detector tube is provided with opening;
Described LCDs selects LCD display;
Described formaldehyde sensor selects air mass sensor.
The utility model energy detected temperatures, humidity, PM2.5 and formaldehyde, only have the humiture could determining air quality index and current environment in conjunction with these parameters better; When ensureing the concentration of detected temperatures, humidity, the concentration of PM2.5 and formaldehyde, relatively and on market similar products price and greatly reduce, the quality of air allowing emphasis oneself breathe and the people of current environment humiture, need not be irresolute because of the price of costliness, while cheap, can be also functionally very sound; In conjunction with the parameter that each collection comes, integrate, draw AQI mono-air quality index better, conveniently fix rank to current, it is convenient to bring to the life of people.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the portable air quality detection device in the utility model embodiment;
Wherein, 1-PM2.5 detection module, 2-detector tube;
Fig. 2 is the electric resistance partial pressure of portable air quality detection device in the utility model embodiment and the circuit theory diagrams of follower circuit.
Embodiment
Below in conjunction with accompanying drawing to the utility model embodiment detailed description in addition.
A kind of portable air quality detection device, as shown in Figure 1, comprises PM2.5 detection module 1, formaldehyde sensor, Temperature Humidity Sensor, single-chip microcomputer, liquid crystal display and power transfer module.
Detector tube 2 is provided with between infrared receiving tube and infrared transmitting tube, the input end of the output terminal concatenation operation amplifier of infrared receiving tube, the output terminal of operational amplifier connects the AD conversion first passage of single-chip microcomputer, Temperature Humidity Sensor is connected with single-chip microcomputer by I2C bus, the output terminal of formaldehyde sensor is connected the AD conversion second channel of single-chip microcomputer with follower circuit by electric resistance partial pressure, the input end of the output terminal connecting fluid crystal display of single-chip microcomputer, the power end of infrared receiving tube, the power end of infrared transmitting tube, the power end of single-chip microcomputer, the power end of operational amplifier, the power end of liquid crystal display, the power end of formaldehyde sensor is connected power transfer module respectively with the power end of Temperature Humidity Sensor, power transfer module external power supply.
PM2.5 detection module 1, for detecting the concentration of particulate in air, and be sent to single-chip microcomputer, PM2.5 detection module 1 comprises infrared receiving tube, infrared transmitting tube and operational amplifier.
Infrared receiving tube and infrared transmitting tube, for by launching, receiving infrared signal, be converted to voltage signal by the concentration of the particle detected in air.
In present embodiment, the model of the infrared receiving tube selected is A3I3, and the model of infrared transmitting tube is A3H3.
Detector tube 2 between infrared receiving tube and infrared transmitting tube is 120 ° of folding shape pipelines, the bending place of detector tube 2 is provided with opening, when carrying out PM2.5 and detecting, the infrared ray that infrared transmitting tube is launched is transmitted into by detector tube 2 in the air of bending place opening, by ultrared diffuse reflection and scattering, received by infrared receiving tube by detector tube 2, the concentration of the stronger then PM2.5 of output voltage signal of infrared receiving tube is higher.
Operational amplifier, for amplifying the voltage signal of infrared receiving tube and being sent to single-chip microcomputer, prevents undesired signal simultaneously.
In present embodiment, the model of the operational amplifier selected is LM358.
Temperature Humidity Sensor, for detecting the temperature and humidity in air, and is sent to single-chip microcomputer.
In present embodiment, the model of the Temperature Humidity Sensor selected is HTU21D.
Formaldehyde sensor selects air mass sensor, for detecting the concentration of the formaldehyde in air, and is sent to single-chip microcomputer.
In present embodiment, the model of the air mass sensor selected is MS1100VOC.
MS1100VOC formaldehyde sensor adopts multilayer thick film manufacturing process, makes well heater and Metal Oxide Semiconductor Gas Sensing layer respectively, be encapsulated in metal shell on the two sides of miniature alumina ceramic substrate.When there is the gas be detected in environment, the conductivity of MS1100VOC formaldehyde sensor changes, and the concentration of this gas is higher, and the conductivity of MS1100VOC formaldehyde sensor is higher.Adopt simple circuit can be the output signal corresponding with gas concentration by the change transitions of this conductivity.MS1100VOC formaldehyde sensor is high to organic gas sensitivity such as benzene, toluene, formaldehyde.Detectable concentration in 0 ~ 1000ppm (gas with various concentration range different), sensitivity >=3%, response time≤5s (3 ~ 5 minutes preheating time), turnaround time > 10s.
Electric resistance partial pressure and follower circuit are as shown in Figure 2, in present embodiment, adopt operational amplifier LM358 as follower, OUT2 pin and the AD conversion second channel being connected single-chip microcomputer after IN2 (-) pins in parallel by resistance R1 of operational amplifier LM358, IN2 (+) pin of operational amplifier LM358 connects one end of electric capacity C1, one end of resistance R2 and one end of resistance R3, the other end of electric capacity C1 and the other end earth of resistance R2, one end of the other end contact resistance R4 of resistance R3, the other end of resistance R4 connects formaldehyde sensor, electric capacity C1, resistance R2, resistance R3 and resistance R4 defines resistor voltage divider circuit.
Single-chip microcomputer, for being converted to digital signal by the simulating signal of PM2.5 detection module 1 and formaldehyde sensor transmission.
In present embodiment, the model of the single-chip microcomputer selected is MSP430F1611 master controller, is 16 super low-power consumption MCU, has 48kB flash memory, 1024B RAM, 12 ADC, two DAC, 2 road USART, road I2C and DMA.
Power transfer module, for external power supply 5V voltage being supplied to infrared receiving tube, infrared transmitting tube, single-chip microcomputer, operational amplifier, the power end of liquid crystal display and formaldehyde sensor, 3.3V voltage is become to be supplied to Temperature Humidity Sensor external power supply voltage transitions.
In present embodiment, power transfer module selects LM1117_3.3 power supply chip, realizes voltage to be converted to 3.3V by 5V.
The external power supply of power transfer module can be connected by 4 joint 1.2V batteries 1, obtains 4.8V burning voltage; 5V voltage can be provided by charger baby; Can be 5V voltage by 220V voltage transitions by power supply adaptor.
LCDs selects LCD display, for showing the temperature of air, humidity, the concentration of formaldehyde and the concentration of particulate in air.
In present embodiment, the model of the LCD display selected is LCD1602.
Use the course of work of above-mentioned portable air quality detection device as follows:
Power supply provides voltage for power transfer module, external power supply 5V voltage is supplied to infrared receiving tube by power transfer module, infrared transmitting tube, single-chip microcomputer, operational amplifier, the power end of liquid crystal display and formaldehyde sensor, 3.3V voltage is become to be supplied to Temperature Humidity Sensor external power supply voltage transitions, infrared receiving tube and infrared transmitting tube are by launching, receive infrared signal, the concentration of the particle detected in air is converted to voltage signal, operational amplifier amplifies the voltage signal of infrared receiving tube and is sent to single-chip microcomputer, Temperature Humidity Sensor detects the temperature and humidity in air and is sent to single-chip microcomputer, formaldehyde sensor detects the concentration of the formaldehyde in air and is sent to single-chip microcomputer, the simulating signal of operational amplifier and formaldehyde sensor transmission is converted to digital signal by single-chip microcomputer, the temperature of LCDs display air, humidity, the concentration of formaldehyde and the concentration of particulate in air.
Embodiment 1: utilize the temperature of the utility model portable air quality detection device detection room air, humidity, the concentration of formaldehyde and the concentration of particulate in air, and the result of detection is compared with normal value, be presented in LCDs, result is shown as: formaldehyde-35ppm; Temperature 20 DEG C; Humidity: 60%; PM2.5--100ug/m3.
Embodiment 2: utilize the temperature of the utility model portable air quality detection device detection indoor and outdoor, humidity, the concentration of formaldehyde and the concentration of particulate in air, result is shown as: formaldehyde-20ppm; Temperature 10 DEG C; Humidity: 30%; PM2.5--128ug/m3.
Claims (5)
1. a portable air quality detection device, is characterized in that, comprises PM2.5 detection module, formaldehyde sensor, Temperature Humidity Sensor, single-chip microcomputer, liquid crystal display and power transfer module;
Described PM2.5 detection module comprises infrared receiving tube, infrared transmitting tube and operational amplifier;
Detector tube is provided with between described infrared receiving tube and infrared transmitting tube, the input end of the output terminal concatenation operation amplifier of infrared receiving tube, the output terminal of operational amplifier connects the first input end of single-chip microcomputer, Temperature Humidity Sensor is connected with single-chip microcomputer by I2C bus, the output terminal of formaldehyde sensor connects the second input end of single-chip microcomputer, the input end of the output terminal connecting fluid crystal display of single-chip microcomputer, the power end of infrared receiving tube, the power end of infrared transmitting tube, the power end of single-chip microcomputer, the power end of operational amplifier, the power end of liquid crystal display, the power end of formaldehyde sensor is connected power transfer module respectively with the power end of Temperature Humidity Sensor, power transfer module external power supply.
2. portable air quality detection device according to claim 1, is characterized in that, described PM2.5 detection module, for detecting the concentration of particulate in air, and is sent to single-chip microcomputer;
Described infrared receiving tube and infrared transmitting tube, for by launching, receiving infrared signal, be converted to voltage signal by the concentration of the particle detected in air;
Described operational amplifier, for amplifying the voltage signal of infrared receiving tube and being sent to single-chip microcomputer, prevents undesired signal simultaneously;
Described Temperature Humidity Sensor, for detecting the temperature and humidity in air, and is sent to single-chip microcomputer;
Described formaldehyde sensor, for detecting the concentration of the formaldehyde in air, and is sent to single-chip microcomputer;
Described single-chip microcomputer, for being converted to digital signal by the simulating signal of PM2.5 detection module and formaldehyde sensor transmission;
Described power transfer module, for converting the magnitude of voltage needed for infrared receiving tube, infrared transmitting tube, single-chip microcomputer, operational amplifier, the power end of liquid crystal display, formaldehyde sensor and Temperature Humidity Sensor to, and to its power supply by supply voltage;
Described LCDs, for showing the temperature of air, humidity, the concentration of formaldehyde and the concentration of particulate in air.
3. portable air quality detection device according to claim 1, is characterized in that, the detector tube between described infrared receiving tube and infrared transmitting tube is folding shape, and its bending angle is 100 ° ~ 150 °, and the bending place of detector tube is provided with opening.
4. portable air quality detection device according to claim 1, is characterized in that, described LCDs selects LCD display.
5. portable air quality detection device according to claim 1, is characterized in that, described formaldehyde sensor selects air mass sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193551.4U CN204649223U (en) | 2015-03-31 | 2015-03-31 | Portable air quality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193551.4U CN204649223U (en) | 2015-03-31 | 2015-03-31 | Portable air quality detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204649223U true CN204649223U (en) | 2015-09-16 |
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ID=54101963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520193551.4U Expired - Fee Related CN204649223U (en) | 2015-03-31 | 2015-03-31 | Portable air quality detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204649223U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606503A (en) * | 2015-12-31 | 2016-05-25 | 上海源则通环保科技有限公司 | Portable atmospheric monitoring azimuth guide intelligent discriminator |
| CN106474643A (en) * | 2016-09-19 | 2017-03-08 | 安徽赛安安全设备有限责任公司 | A kind of built-in automaton for rack fire extinguishing |
| CN108020270A (en) * | 2018-02-01 | 2018-05-11 | 攀枝花学院 | Detection of Air Quality circuit |
-
2015
- 2015-03-31 CN CN201520193551.4U patent/CN204649223U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606503A (en) * | 2015-12-31 | 2016-05-25 | 上海源则通环保科技有限公司 | Portable atmospheric monitoring azimuth guide intelligent discriminator |
| CN106474643A (en) * | 2016-09-19 | 2017-03-08 | 安徽赛安安全设备有限责任公司 | A kind of built-in automaton for rack fire extinguishing |
| CN108020270A (en) * | 2018-02-01 | 2018-05-11 | 攀枝花学院 | Detection of Air Quality circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20180331 |