CN206787612U - A kind of IAQ detecting system - Google Patents
A kind of IAQ detecting system Download PDFInfo
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- CN206787612U CN206787612U CN201720488435.4U CN201720488435U CN206787612U CN 206787612 U CN206787612 U CN 206787612U CN 201720488435 U CN201720488435 U CN 201720488435U CN 206787612 U CN206787612 U CN 206787612U
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Abstract
The utility model relates generally to Detection of Air Quality field, more particularly, to a kind of IAQ detecting system.The formaldehyde sensor of IAQ detecting system, Mars sensor, Temperature Humidity Sensor, carbon dioxide sensor, Smoke Sensor, optical sensor, pyroelectric sensing module, the output end of power module are connected to the input of single-chip microcomputer；The output end of single-chip microcomputer is connected to the input of display module, indicator lamp；The memory module is connected to single-chip microcomputer；The output end of manual key is connected to the input of single-chip microcomputer；The output end of clock module is connected to the input of single-chip microcomputer；Single-chip microcomputer is connected to USB interface.A kind of IAQ detecting system of the utility model, IAQ is detected by each sensor, the air quality parameters detected are shown by display module, at night, according to the infrared signal detected, judge whether air quality is beneficial to health.
Description
Technical field
The utility model relates generally to Detection of Air Quality field, is examined more specifically to a kind of IAQ
Examining system.
Background technology
With the improvement of living standards, the housing condition of people has obtained very big improvement, but IAQ is continuous
Deteriorate.It is not high to the cognition degree of room air pollution for current people, the high situation of professional testing cost, devise one kind
IAQ detecting system, it can be in and carry out the detection of air quality.
Utility model content
The utility model passes through each sensing mainly solving the technical problems that provide a kind of IAQ detecting system
Device detects IAQ, and the air quality parameters detected are shown by display module, night, according to what is detected
Infrared signal, judges whether air quality is beneficial to health.
In order to solve the above technical problems, a kind of IAQ detecting system of the utility model include formaldehyde sensor,
Mars sensor, Temperature Humidity Sensor, carbon dioxide sensor, Smoke Sensor, optical sensor, power module, single-chip microcomputer,
USB interface, display module, indicator lamp, manual key, clock module, memory module, pyroelectric sensing module, pass through each sensing
Device detects IAQ, and the air quality parameters detected are shown by display module, night, according to what is detected
Infrared signal, judges whether air quality is beneficial to health.
Wherein, the output end of the formaldehyde sensor is connected to the input of single-chip microcomputer；The output of the Mars sensor
End is connected to the input of single-chip microcomputer；The output end of the Temperature Humidity Sensor is connected to the input of single-chip microcomputer；The dioxy
The output end for changing carbon sensor is connected to the input of single-chip microcomputer；The output end of the Smoke Sensor is connected to the defeated of single-chip microcomputer
Enter end；The output end of the optical sensor is connected to the input of single-chip microcomputer；The output end of the power module is connected to list
The input of piece machine；The output end of the single-chip microcomputer is connected to the input of display module；The memory module is connected to monolithic
Machine；The output end of the single-chip microcomputer is connected to the input of indicator lamp；The output end of the manual key is connected to single-chip microcomputer
Input；The output end of the clock module is connected to the input of single-chip microcomputer；The output end of the pyroelectric sensing module connects
Then the input of single-chip microcomputer；The single-chip microcomputer is connected to USB interface.
As further optimization of the present utility model, monolithic described in a kind of IAQ detecting system of the utility model
Machine uses AT89C51 single-chip microcomputers.
It is warm and humid described in a kind of IAQ detecting system of the utility model as further optimization of the present utility model
Degree sensor uses SHT11 Temperature Humidity Sensors.
As further optimization of the present utility model, smog described in a kind of IAQ detecting system of the utility model
Sensor uses DSM501 sensors.
As further optimization of the present utility model, formaldehyde described in a kind of IAQ detecting system of the utility model
Sensor uses MS1100 formaldehyde VOC sensors.
As further optimization of the present utility model, illumination described in a kind of IAQ detecting system of the utility model
Sensor uses BH1750 chips.
As further optimization of the present utility model, USB described in a kind of IAQ detecting system of the utility model
Interface uses MAX232 chips.
Control effect：A kind of IAQ detecting system of the utility model, room air is detected by each sensor
Quality, the air quality parameters detected are shown by display module, at night, according to the infrared signal detected, are judged
Whether air quality is beneficial to health.
Brief description of the drawings
The utility model is described in more detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is a kind of hardware structure diagram of IAQ detecting system of the utility model.
Fig. 2 is a kind of circuit diagram of the single-chip microcomputer of IAQ detecting system of the utility model.
Fig. 3 is a kind of circuit diagram of the Temperature Humidity Sensor of IAQ detecting system of the utility model.
Fig. 4 is a kind of circuit diagram of the Smoke Sensor of IAQ detecting system of the utility model.
Fig. 5 is a kind of circuit diagram of the clock module of IAQ detecting system of the utility model.
Fig. 6 is a kind of circuit diagram of the power module of IAQ detecting system of the utility model.
Fig. 7 is a kind of circuit diagram of the formaldehyde sensor of IAQ detecting system of the utility model.
Fig. 8 is a kind of circuit diagram of the carbon dioxide sensor of IAQ detecting system of the utility model.
Fig. 9 is a kind of circuit diagram of the display module of IAQ detecting system of the utility model.
Figure 10 is a kind of circuit diagram of the pyroelectric sensing module of IAQ detecting system of the utility model.
Figure 11 is a kind of circuit diagram of the optical sensor of IAQ detecting system of the utility model.
Figure 12 is a kind of circuit diagram of the USB interface of IAQ detecting system of the utility model.
Figure 13 is a kind of circuit diagram of the memory module of IAQ detecting system of the utility model.
Figure 14 is a kind of circuit diagram of the Mars sensor of IAQ detecting system of the utility model.
Figure 15 is a kind of circuit diagram of the indicator lamp of IAQ detecting system of the utility model.
Embodiment
Embodiment one：
Illustrate present embodiment, present embodiment institute with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
Stating a kind of IAQ detecting system includes formaldehyde sensor, Mars sensor, Temperature Humidity Sensor, carbon dioxide sensing
Device, Smoke Sensor, optical sensor, power module, single-chip microcomputer, USB interface, display module, indicator lamp, manual key, when
Clock module, memory module, pyroelectric sensing module, IAQ, the air quality detected are detected by each sensor
Parameter is shown by display module, at night, according to the infrared signal detected, judges whether air quality is good for beneficial to human body
Health.
Wherein, the output end of the formaldehyde sensor is connected to the input of single-chip microcomputer, and formaldehyde sensor uses MS1100
Formaldehyde VOC sensors, the metal oxide containing precious metals in formaldehyde VOC sensors run into VOC gas resistance and changed, sensor internal
The resistance of similar heating wire can be changed according to the concentration of VOC gas, and VOC gas are detected according to the change of resistance
Concentration, the gas concentration detected is sent to the P1.3 pins of single-chip microcomputer by IN ends.
The output end of the Mars sensor is connected to the input of single-chip microcomputer, and Mars sensor uses R2868 sensors,
Mars sensor finds Mars source using ultraviolet by the photoelectricity effect and gas multiplicative effect of metal, and detection interior is
It is no to have Mars, the data signal detected is sent in single-chip microcomputer, the R_OUT ends of Mars sensor output signals to single-chip microcomputer
P0.5 pins.
The output end of the Temperature Humidity Sensor is connected to the input of single-chip microcomputer, and Temperature Humidity Sensor uses SHT11 temperature
Humidity sensor, Temperature Humidity Sensor detect the temperature and humidity value of room air, are sent to single-chip microcomputer and are handled.SHT11 is warm and humid
The SCK pins for spending sensor input for serial clock, for making single-chip microcomputer synchronous with the communication of Temperature Humidity Sensor, DATA pins
For serial data, for reading sensing data, when sending order to sensor, DATA is in SCK rising edges effectively and in SCK
It must keep stable during high level.DATA changes after SCK trailing edges.In order to ensure communication security, DATA effective time
A period of time should be extended respectively before SCK rising edges and after trailing edge, when from sensor readings, DATA exists
SCK step-downs are later effective, and the trailing edge maintained to next SCK, and to avoid signal conflict, MCU driving DATA is in low electricity
Put down, it is necessary to which the pull-up resistor of an outside lifts signal to high level, the DATA pins and SCK pins point of Temperature Humidity Sensor
P1.0, P1.1 pin of single-chip microcomputer are not connected to.
The output end of the carbon dioxide sensor is connected to the input of single-chip microcomputer, and carbon dioxide sensor uses SK-
500-N density of carbon dioxide gas sensors, carbon dioxide sensor are used to detect CO in environment2Gas concentration value, SK-500-
VOUT pin (voltage/current signals output), RXD (sensor serial ports receives pin), the TXD of N density of carbon dioxide gas sensors
(sensor serial ports sends pin), RDE (serial ports output control pin) are connected with P1.4, P1.5, P1.6, P1.7 pin of single-chip microcomputer
Connect.
The output end of the Smoke Sensor is connected to the input of single-chip microcomputer, and Smoke Sensor is sensed using DSM501
Device, when gas or smokescope increase, the bulk resistor of sensor is caused to decline, the output voltage of the pin of sensor 6 over the ground increases
Greatly, i.e. the voltage rise of R1, this voltage is compared with reference voltage is through over-voltage comparator, when voltage exceedes threshold value, electricity
1 pin exports high level in road, and the MQ pins of Smoke Sensor are connected with the P1.2 pins of single-chip microcomputer.
The output end of the optical sensor is connected to the input of single-chip microcomputer, and optical sensor uses BH1750 chips,
Illumination detection module is used for intensity of illumination in indoor air environment, and BH1750 is a kind of numeric type environmental light intensity for not differentiating between light source
Spend sensor, supply voltage 3.3V, using the integrated circuit of twin wire serial bus interface, according to the light intensity number of collection
According to environmental monitoring is carried out, the high-resolution with 1-65535lx (lx is intensity of illumination unit), large range of illumination can be supported
Strength Changes, BH1750 SCL, SDA pin are connected with the P0.1 and P0.2 of single-chip microcomputer respectively.
The output end of the power module is connected to the input of single-chip microcomputer, and power module by being by 220V voltage conversions
5V voltages are powered for single-chip microcomputer, and family generally uses 220V voltages as reference power supply, but due to the operating voltage of single-chip microcomputer
For 5V, 220V voltages are depressured by power module, filtered, voltage stabilizing etc. is converted into 5V voltages and is input to list from VCC pin
Piece machine.
The output end of the single-chip microcomputer is connected to the input of display module, and display module shows the room air detected
Quality information, display module use LCD1602 LCDs, data terminal DB0, DB1 of display module, DB2, DB3, DB4,
DB5, DB6, DB7 are connected with P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, P2.7 pin of single-chip microcomputer, for showing
Registration evidence；(RS is register selection, selects during high level 1 selection when data register, low level 0 to refer at the RS ends of display module
Make register) it is connected with the P3.5 pins of single-chip microcomputer, for control data order；(RW believes for read-write at the RW ends of display module
Number line, carries out read operation during high level 1, carries out write operation during low level 0) it is connected with the P3.6 pins of single-chip microcomputer, for controlling
Read-write operation processed；The Enable Pin E (E ends are Enable Pin) of display module is connected with the P3.7 pins of single-chip microcomputer；Single-chip microcomputer
P3.5, P3.6, P3.7 pin are used for the strobe state for controlling the charactron in display module.
The memory module is connected to single-chip microcomputer, and memory module uses FEM25256 chips, and (piece selects the CS of memory module
End), MISO (input of spi bus main frame/slave output), MOSI (the main output of spi bus/from input), SCLK1 (clock pins)
End is connected with P4.0, P4.1, P4.3, P4.2 pin of single-chip microcomputer respectively.
The output end of the single-chip microcomputer is connected to the input of indicator lamp, and indicator lamp uses LED light emitting diodes, indicator lamp
Indicate the working condition of each sensor, indicator lamp includes 7 LED, port L1, L2, L3, L4, L5, L6, L7, L8 of indicator lamp with
P5.0, P5.1, P5.2, P5.3, P5.4, P5.5, P5.6, P5.7 pin of single-chip microcomputer are connected.
The output end of the manual key is connected to the input of single-chip microcomputer, and manual key uses Independent keys, pressed manually
Key includes two Independent keys, and button S2 is selection key, and button S3 is confirmation button, realizes the measurement work of each sensor,
Manual key one end is connected to resistance eutral grounding, and one end is connected to P4.5, P4.7 pin of single-chip microcomputer.
The output end of the clock module is connected to the input of single-chip microcomputer, and clock module uses DS1302 clock chips,
Clock chip provides time reference signal for single-chip microcomputer, and the communication interface of DS1302 clock chips is made up of 3 mouth lines, i.e. RST,
SCLK, I/O, wherein RST become high level from low level and start a data transmission procedure, and SCLK is clock line, and I/O is data
Line, 3 mouth lines of DS1302 clock chips, RST mouths are connected with the P3.2 pins of single-chip microcomputer, the P3.0 of SCLK mouths and single-chip microcomputer
Pin is connected, and I/O mouths are connected with the P3.1 pins of single-chip microcomputer.
The output end of the pyroelectric sensing module is connected to the input of single-chip microcomputer, and pyroelectric sensing module uses
BIS0001 Thermoelectric Infrared Sensors, pyroelectric infrared sensor detect target by the temperature difference of target and background, utilize
Pyroelectric effect, electrode is set on the upper and lower surface of the crystalloid of barium titanate one, in upper surface coated with black film, if there is infrared ray
Intermittently to irradiate, its surface temperature rises △ T, and the atomic arrangement of its crystals will produce change, cause spontaneous polarisation charge,
Voltage △ U are produced between upper/lower electrode, determine that sensor detects infrared signal according to voltage difference is produced between upper/lower electrode.
The indoor infrared signal of pyroelectric sensing module detection, single-chip microcomputer judge whether indoor current air quality is beneficial to the strong of human body
Health, pyroelectric sensing module detect that infrared signal exports low level signal to the P0.0 pins of single-chip microcomputer from OUT1 mouths.
The single-chip microcomputer is connected to USB interface, and USB interface uses MAX232 chips, cable data is carried out by USB interface
Transmission, the voltage conversion that control module exports is carried out data transmission required voltage into USB interface by MAX232 chips, is USB
Interface provides voltage conversion, and P0.3, P0.4 pin connection of TXD1, RXD1 pin and single-chip microcomputer of USB interface carry out data biography
It is defeated.
Embodiment two：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, the single-chip microcomputer is adopted
With AT89C51 single-chip microcomputers.The AT89C51 single-chip microcomputers have the step-by-step operation system of complete set from its internal hardware to software
System, ram in slice section also especially open the address section of a dual-use function, 16 bytes, element address 20H~2FH,
It can both make byte processing, can also make position processing.The setting and use of the I/O pin of 51 single-chip microcomputers are very simple, when the pin make it is defeated
Enter pin in use, the pin need only be arranged to high level (during reset, each I/O mouths put high electricity).When the pin makees output pin use
When, then it is high level or low level.
Embodiment three：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, the humiture passes
Sensor uses SHT11 Temperature Humidity Sensors.Sensing element and signal processing circuit are integrated in one piece by SHT11 Temperature Humidity Sensors
On micro-circuit board, the data signal demarcated completely is exported.Sensor uses the CMOSens technologies of patent, it is ensured that product has
High reliability and remarkable long-time stability.Sensor includes capacitive character condensate hygrometric sensing element, a use
Temperature element made of gap material, and in same chip, realized with the A/D converter and serial interface circuit of 14 seamless
Connection.
Embodiment four：
Illustrate present embodiment, the smog sensing with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
Device uses DSM501 sensors.DSM501 sensors can collect the relevant information such as pollen, smog around, have heating inside it
Auto-admission equipment, its internal adjustable resistance can set the particle diameter of powder, can typically detect the micro- of 1 μm or so of diameter
Small particles, the higher 0.5mg/m of the degree of accuracy3, and sensor ratio is dexterousr, and weight is also smaller, convenient installation.When air is sent out
The particle that sensor can be in absorbed themselves air during raw flowing, PWM non-inverting inputs, the spy of sensor can be maintained for a long time
Property.
Embodiment five：
Illustrate present embodiment, the formaldehyde sensing with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
Device uses MS1100 formaldehyde VOC sensors.MS1100 formaldehyde VOC sensors are a kind of sensors of detection gas concentration, are used for
A variety of volatile organic components such as formaldehyde, benzene, dimethylbenzene in the detection air such as formaldehyde, benzene, dimethylbenzene in detection air, have
High sensitivity and stability, compact.
Embodiment six：
Illustrate present embodiment, the illumination sensing with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
Device uses BH1750 chips.The analog-digital converter of the BH1750 built-in chip types 16, it can directly export a numeral letter
Number, it is not necessary to the calculating of complexity is done again.This is a kind of more superior and the easy chip using simple resistor, by calculating electricity
Pressure, to obtain effective data.This ambient light sensor can be measured directly by photometer.The unit of luminous intensity is stream
Bright " lx ".When object, it can be in every square metre of acquisition 1lx luminous flux under uniform illumination, and their luminous intensity is 1lx.
Sometimes for light source is made full use of, you can increase the reflection unit of a light source.It can just be obtained in some directions like that more
Luminous flux, with increase by according to surface brightness.
Embodiment seven：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, the USB interface is adopted
With MAX232 chips.MAX232 is a kind of double set drive/receivers, in piece containing a capacitive voltage generator so as to
EIA/TIA-232-E level is provided during single 5V power supplys power supply.Communicated when with single-chip microcomputer and PC by serial ports, although monolithic
Machine has the function of serial communication, but the signal level of single-chip microcomputer offer and RS232 standard are different, therefore to pass through MAX232
This similar chip carries out level conversion.
A kind of operation principle of IAQ detecting system of the utility model is：A kind of room air of the utility model
Quality detecting system, the content of formaldehyde in room air is detected by formaldehyde sensor, whether Mars sensor detection interior has
Mars signal, Temperature Humidity Sensor detect the temperature and humidity value of indoor environment, and carbon dioxide sensor detects the dioxy of indoor environment
Change carbon content, Smoke Sensor detects the smokescope of indoor environment, the indoor intensity of illumination of optical sensor detection, each sensing
The indoor environment parameter that device detects is sent to single-chip microcomputer, and single-chip microcomputer will detect that ambient parameter is sent to display module and shown
Show.Hand push button selection sensor carries out ambient parameter measurement, the state of indicator lamp indication sensor work, when the sensor work
Make, the corresponding indicator lamp of the sensor is luminous to be indicated.Each sensors sense environmental parameter, is sent to memory module and is deposited
Storage, convenient to call in the future, the ambient parameter detected can also be sent to host computer by USB interface and be checked.Clock mould
Block provides time reference signal, is sent to single-chip microcomputer, is collectively stored in detection data in memory module, pyroelectric sensing module
Indoor human infrared signal is detected, when detecting infrared signal, single-chip microcomputer judges the ambient parameter detected, if beneficial to people
Body health, the result of judgement indicated that, when result is beneficial to health, indicator lamp does not light by indicator lamp, when result not
Beneficial to health, all indicator lamps are simultaneously luminous to be indicated.
Although the utility model is disclosed as above with preferred embodiment, it is not limited to the utility model, appoints
What person skilled in the art, is not departing from spirit and scope of the present utility model, can do various changes and modification, therefore
What the scope of protection of the utility model should be defined by claims is defined.
Claims (7)
1. a kind of IAQ detecting system, it is characterised in that the IAQ detecting system passes including formaldehyde
Sensor, Mars sensor, Temperature Humidity Sensor, carbon dioxide sensor, Smoke Sensor, optical sensor, power module, list
Piece machine, USB interface, display module, indicator lamp, manual key, clock module, memory module, pyroelectric sensing module, the first
The output end of aldehyde sensor is connected to the input of single-chip microcomputer；The output end of the Mars sensor is connected to the input of single-chip microcomputer
End；The output end of the Temperature Humidity Sensor is connected to the input of single-chip microcomputer；The output end of the carbon dioxide sensor connects
Then the input of single-chip microcomputer；The output end of the Smoke Sensor is connected to the input of single-chip microcomputer；The optical sensor
Output end be connected to the input of single-chip microcomputer；The output end of the power module is connected to the input of single-chip microcomputer；The list
The output end of piece machine is connected to the input of display module；The memory module is connected to single-chip microcomputer；The output of the single-chip microcomputer
End is connected to the input of indicator lamp；The output end of the manual key is connected to the input of single-chip microcomputer；The clock module
Output end be connected to the input of single-chip microcomputer；The output end of the pyroelectric sensing module is connected to the input of single-chip microcomputer；
The single-chip microcomputer is connected to USB interface.
A kind of 2. IAQ detecting system according to claim 1, it is characterised in that：The single-chip microcomputer uses
AT89C51 single-chip microcomputers.
A kind of 3. IAQ detecting system according to claim 1, it is characterised in that：The Temperature Humidity Sensor
Using SHT11 Temperature Humidity Sensors.
A kind of 4. IAQ detecting system according to claim 1, it is characterised in that：The Smoke Sensor is adopted
With DSM501 sensors.
A kind of 5. IAQ detecting system according to claim 1, it is characterised in that：The formaldehyde sensor is adopted
With MS1100 formaldehyde VOC sensors.
A kind of 6. IAQ detecting system according to claim 1, it is characterised in that：The optical sensor is adopted
With BH1750 chips.
A kind of 7. IAQ detecting system according to claim 1, it is characterised in that：The USB interface uses
MAX232 chips.
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| CN201720488435.4U CN206787612U (en) | 2017-05-04 | 2017-05-04 | A kind of IAQ detecting system |
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| CN201720488435.4U CN206787612U (en) | 2017-05-04 | 2017-05-04 | A kind of IAQ detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760989A (en) * | 2018-06-05 | 2018-11-06 | 深圳市无眼界科技有限公司 | A kind of air-quality monitoring system and its monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760989A (en) * | 2018-06-05 | 2018-11-06 | 深圳市无眼界科技有限公司 | A kind of air-quality monitoring system and its monitoring method |
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