CN109211307A - A kind of domestic environment quality monitoring device based on STM32 single-chip microcontroller - Google Patents
A kind of domestic environment quality monitoring device based on STM32 single-chip microcontroller Download PDFInfo
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- CN109211307A CN109211307A CN201710535062.6A CN201710535062A CN109211307A CN 109211307 A CN109211307 A CN 109211307A CN 201710535062 A CN201710535062 A CN 201710535062A CN 109211307 A CN109211307 A CN 109211307A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 47
- 230000007613 environmental effect Effects 0.000 claims abstract description 24
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 42
- 239000010408 film Substances 0.000 claims description 26
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- XOLBLPGZBRYERU-UHFFFAOYSA-N SnO2 Inorganic materials O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 10
- 239000002070 nanowire Substances 0.000 claims description 10
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000013618 particulate matter Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 3
- 230000006855 networking Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The present invention proposes a kind of domestic environment quality monitoring device based on STM32 single-chip microcontroller, including STM32F103 single-chip microcontroller, environmental quality measurement module and Wi-Fi module；Each environmental quality measurement module is connect with the STM32F103 single-chip microcontroller by I/O port respectively, and the STM32F103 single-chip microcontroller is connect with the Wi-Fi module by I/O port.AT instruction is preset in Wi-Fi module according to the needs of use, then measurement data is uploaded to the OneNet platform of internet of things of China Mobile by http protocol, the APIKey and device coding provided by platform of internet of things can realize that present device checks that the product of concentration value is attached with setting on platform of internet of things.Through the invention, it can be achieved that personalized, low cost, distributed measurement, user can pass through computer or the air quality of mobile phone real time inspection measurement point.
Description
Technical field
The present invention relates to environmental quality monitoring fields, and in particular to a kind of personalized, domestic environment that can check online
Quality monitoring device.
Background technique
Currently, domestic environment quality monitoring device in the market it is multiple functional be mostly display type on the spot, and can be with
When the detector universal functionality checked it is less, one, two kind of parameter can only be measured, and networking can not be carried out.User cannot select certainly
Oneself wants the parameter of measurement, if user wants to measure certain parameter, must buy the subsidiary all the sensors mould of the instrument
Block, sensor is at high price, this causes great waste to a certain extent.
Therefore, a kind of low cost, the domestic environment quality monitoring device that can check whenever and wherever possible how are provided, just at being worth
It must solve the problems, such as.
Summary of the invention
In view of the above-mentioned problems, the present invention propose it is a kind of have many advantages, such as personalized, low cost, can check online based on
The domestic environment quality monitoring device of STM32 single-chip microcontroller, and be achieved through the following technical solutions.
The present invention provides a kind of domestic environment quality monitoring device based on STM32 single-chip microcontroller, including STM32F103 monolithic
Machine, environmental quality measurement module and Wi-Fi module；Each environmental quality measurement module is mono- with the STM32F103 respectively
Piece machine is connected by I/O port, and the STM32F103 single-chip microcontroller is connect with the Wi-Fi module by I/O port.According to the needs of use
AT instruction is preset in Wi-Fi module, then measurement data is uploaded to the OneNet Internet of Things of China Mobile by http protocol
Net platform, the APIKey and device coding provided by platform of internet of things can be realized and be set on present device and platform of internet of things
Check that the product of concentration value is attached.
Preferably, measurement data can be transmitted to described by each environmental quality measurement module by serial port protocol
STM32F103 single-chip microcontroller；The STM32F103 single-chip microcontroller is able to respond and handles the measurement data received and by treated
Data are transmitted to the Wi-Fi module by serial port protocol；After the Wi-Fi module can be by the correspondingly received processing arrived
Data and China Mobile's OneNet platform of internet of things is uploaded to by http protocol.
Preferably, the environmental quality measurement module includes that carbon dioxide and TVOC gas collecting module and/or PM2.5 are passed
Sensor and/or Temperature Humidity Sensor and/or formaldehyde sensor and/or benzene sensor and/or ammonia detection module.The present apparatus has
Personalized feature, provides a variety of measurement modules and interface, user can select one or more measurement modules as needed.
Preferably, the carbon dioxide and TVOC gas collecting module are CCS811 sensor, and the PM2.5 sensor is
Akala PMS5003S particulate matter sensors, the Temperature Humidity Sensor are SHT20 digital hygro sensor, the formaldehyde sensing
Device is akala number formaldehyde sensor, and the benzene sensor is MQ137 type gas sensor, and the Wi-Fi module is that pleasure is prosperous
ESP8266 chip.The CCS811 sensor is TVOC gas collecting module and equivalent carbon dioxide acquisition module, the sensor
8 MCU are inside integrated with, voltage value is converted into actual concentrations value without algorithm, it is only necessary to be carried out by serial port protocol and single-chip microcontroller
Communication, can obtain actual concentrations value.The akala PMS5003S particulate matter sensors are carried out by serial port protocol and single-chip microcontroller
Practical PM2.5 concentration value can be obtained in communication, single-chip microcontroller.The SHT20 digital hygro sensor passes through serial port protocol and list
Piece machine is communicated, and actual temperature value and humidity value can be obtained.The akala formaldehyde sensor passes through serial port protocol and monolithic
Machine is communicated, and practical concentration of formaldehyde value can be obtained in single-chip microcontroller.The MQ137 type gas sensor output is analog voltage,
Enter single-chip microcontroller after AD conversion, actual value can be obtained by algorithmic formula conversion.
Preferably, the 1st pin of the CCS811 sensor meets power supply+5V, and the 2nd pin and the 8th pin meet GND, the 3rd~
5 pins connect the 2nd~4 pin of the STM32F103 single-chip microcontroller respectively；The 1st of the akala PMS5003S particulate matter sensors
Pin meets power supply+5V, and the 2nd pin meets GND, and the 3rd~6 pin connects the 15th of the STM32F103 single-chip microcontroller the, 16,17,20 respectively
Pin；5th pin of the SHT20 digital hygro sensor meets power supply+3.3V, and the 2nd pin meets GND, and the 7th pin is grounded,
1st, 6 pins connect the 59th of the STM32F103 single-chip microcontroller the, 58 pins respectively；Draw the 1st of the akala number formaldehyde sensor
Foot meets power supply+5V, and the 2nd pin meets GND, the 3rd, 6,7 pins connect the 28th, 29, the 30 of the STM32F103 single-chip microcontroller respectively and draw
Foot；1st pin of the MQ137 type gas sensor meets GND, and what the 3rd pin connect the STM32F103 single-chip microcontroller the 24th draws
Foot, the 4th pin meet power supply+5V；The prosperous ESP8266 chip of pleasure the 1st, 8 pins connect the STM32F103 single-chip microcontroller respectively
The 45th, 44 pins, the 2nd pin meets power supply+3.3V, and the resistance of the 4th 1 kilo-ohm of pin serial connection is followed by the STM32F103 monolithic
43rd pin of machine, power supply+3.3V is connected after the resistance of the 6th 4.7 kilo-ohms of pin serial connection, and the 7th pin meets GND.
Preferably, the domestic environment quality monitoring device of the invention based on STM32 single-chip microcontroller further includes that sensor is known
Other circuit, the input terminal of the sensor identification circuit are provided with the interface for each environmental quality measurement module connection, institute
The output end for stating sensor identification circuit is connect with the STM32F103 single-chip microcontroller by I/O port.
Preferably, the sensor identification circuit includes 8-3 encoder 74LS348 chip and switching circuit；It is described
0th~7 pin of 74LS348 chip is connected separately with an interface for each environmental quality measurement module connection, described
Each interface is connected separately with the switching circuit, the 74LS348 chip the 9th, 7,6,15 pins connect respectively it is described
STM32F103 single-chip microcontroller the 38th, 39,40,37 pins.A key is set by each environmental quality measurement module interface, it will
It after the environmental quality measurement module access of selection, presses the button, which single-chip microcontroller judges by the value that sensor identification circuit exports
A little measurement modules are accessed, can be started measurement.
Preferably, the switching circuit includes filter resistance, filter capacitor and key switch；The one of the filter resistance
End connection power supply+3.3V, the other end of filter resistance connect one end of the filter capacitor, one end of the key switch simultaneously
And an interface, the other end of the other end of the filter capacitor and the key switch are grounded.
Preferably, the domestic environment quality monitoring device of the invention based on STM32 single-chip microcontroller further includes carbon monoxide gas
Body sensor, the CO gas sensor are connect with the STM32F103 single-chip microcontroller by I/O port after AD conversion；Institute
CO gas sensor is stated to include heating module, the Si substrate being set to above the heating module, be formed in the Si
Silicon oxide film in substrate, the W film being set on the silicon oxide film, the WO3 nano wire being formed on the W film are thin
Film, the SnO2 nano thin-film being covered on the WO3 nano wire film and two be set on the SnO2 nano thin-film
Pt electrode.
It is further preferred that the silicon oxide film with a thickness of 400~500nm, the W film with a thickness of 200~
250nm, the length of the WO3 nano wire are 1000~1500nm.
The above serial port protocol, http protocol, AT instruction, APIKey, device coding and algorithmic formula are the prior art, this
Field those of ordinary skill combines the prior art that above-mentioned technical proposal can be realized according to the present disclosure.
Compared with prior art, the advantages and positive effects of the present invention are:
1, personalized --- user oneself can need, and any sensor measurement module for selecting the present apparatus to provide is easily
It is installed, realizes individualized measurement, reduce unnecessary cost；
2, distributed --- measurement module can be placed on the positions such as kitchen, bedroom, parlor as needed and measured
And networking is added to platform of internet of things, platform of internet of things have the advantages that it is at low cost, easy to operate, as long as family have router or
Person, which buys Internet of Things network interface card (SIM card), can meet hardware requirement, and user directly adds equipment at platform of internet of things interface can be complete
It works at networking；
3, convenience --- measurement data is uploaded to by platform of internet of things, user by http protocol using Wi-Fi module
Indoor any room and the air quality of any time can be checked in computer webpage, cell phone application whenever and wherever possible.
Detailed description of the invention
Fig. 1 is the circuit diagram of the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of carbon monoxide transducer in the embodiment of the present invention two；
Marked in the figure: 1- heating module；2-Si substrate；3- silicon oxide film；4-W film；5-WO3 nano wire film；6-
SnO2 nano thin-film；7-Pt electrode.
Specific embodiment
In order to better understand the present invention, it illustrates with reference to the accompanying drawings and examples.
Embodiment one:
As shown in Figure 1, the domestic environment quality monitoring device based on STM32 single-chip microcontroller of the present embodiment includes
STM32F103 single-chip microcontroller, environmental quality measurement module, sensor identification circuit and Wi-Fi module；Each environmental quality is surveyed
Amount module is connect with the STM32F103 single-chip microcontroller by I/O port respectively, the STM32F103 single-chip microcontroller and the Wi-Fi mould
Block is connected by I/O port.The input terminal of the sensor identification circuit is provided with for each environmental quality measurement module connection
Interface, the output end of the sensor identification circuit are connect with the STM32F103 single-chip microcontroller by I/O port.In each environment
A key is set by quality measurement module interface, after the environmental quality measurement module of selection is accessed, is pressed the button,
STM32F103 single-chip microcontroller judges which measurement module has been accessed by the value that sensor identification circuit exports, and can be started
Measurement.
It is mono- that measurement data can be transmitted to the STM32F103 by serial port protocol by each environmental quality measurement module
Piece machine；The STM32F103 single-chip microcontroller is able to respond and handles the measurement data received and data pass through string by treated
Mouth agreement is transmitted to the Wi-Fi module；The Wi-Fi module to treated data and can be passed through by correspondingly received
Http protocol is uploaded to China Mobile's OneNet platform of internet of things.AT instruction is preset in Wi-Fi module according to the needs of use, so
Measurement data is uploaded to by http protocol the OneNet platform of internet of things of China Mobile afterwards, is provided by platform of internet of things
APIKey and device coding can realize that present device checks that the product of concentration value is attached with setting on platform of internet of things.
The environmental quality measurement module includes carbon dioxide and TVOC gas collecting module, PM2.5 sensor, temperature and humidity
Sensor, formaldehyde sensor and benzene sensor.The present apparatus has personalized feature, provides a variety of measurement modules and interface,
User can select one or more measurement modules as needed.The carbon dioxide and TVOC gas collecting module are CCS811 biography
Sensor, the PM2.5 sensor are akala PMS5003S particulate matter sensors, and the Temperature Humidity Sensor is SHT20 number temperature
Humidity sensor, the formaldehyde sensor are akala number formaldehyde sensor, and the benzene sensor is MQ137 type gas sensing
Device, the Wi-Fi module are happy prosperous ESP8266 chip.The sensor identification circuit includes 8-3 encoder 74LS348 chip
And switching circuit.
1st pin of the CCS811 sensor meets power supply+5V, and the 2nd pin and the 8th pin connect GND, the 3rd~5 pin point
The 2nd~4 pin of the STM32F103 single-chip microcontroller is not connect；1st pin of the akala PMS5003S particulate matter sensors connects electricity
Source+5V, the 2nd pin meet GND, and the 3rd~6 pin connects the 15th of the STM32F103 single-chip microcontroller the, 16,17,20 pins respectively；Institute
The 5th pin for stating SHT20 digital hygro sensor meets power supply+3.3V, and the 2nd pin meets GND, and the 7th pin ground connection, the 1st, 6 draw
Foot connects the 59th of the STM32F103 single-chip microcontroller the, 58 pins respectively；1st pin of the akala number formaldehyde sensor connects electricity
Source+5V, the 2nd pin meet GND, the 3rd, 6,7 pins connect the 28th of the STM32F103 single-chip microcontroller the, 29,30 pins respectively；It is described
1st pin of MQ137 type gas sensor meets GND, and the 3rd pin connects the 24th pin of the STM32F103 single-chip microcontroller, and the 4th draws
Foot meets power supply+5V；The prosperous ESP8266 chip of pleasure the 1st, 8 pins connect the 45th, the 44 of the STM32F103 single-chip microcontroller respectively
Pin, the 2nd pin meet power supply+3.3V, and the resistance of the 4th 1 kilo-ohm of pin serial connection is followed by the 43rd of the STM32F103 single-chip microcontroller and draws
Foot, power supply+3.3V is connected after the resistance of the 6th 4.7 kilo-ohms of pin serial connection, and the 7th pin meets GND.The 0th of the 74LS348 chip
~7 pins are connected separately with an interface for each environmental quality measurement module connection, and each interface is connected separately with
One switching circuit, the 74LS348 chip the 9th, 7,6,15 pins connect the of the STM32F103 single-chip microcontroller respectively
38,39,40,37 pin.The switching circuit includes filter resistance, filter capacitor and key switch；The filter resistance
One end connects power supply+3.3V, the other end of filter resistance connect simultaneously one end of the filter capacitor, the key switch one
The other end of end and an interface, the other end of the filter capacitor and the key switch is grounded.
The above serial port protocol, http protocol, AT instruction, APIKey, device coding and algorithmic formula are the prior art, this
Field those of ordinary skill combines the prior art that above-mentioned technical proposal can be realized according to the present disclosure.
The following are CCS811 sensors and the agreement selections of STM32F103 single chip communication:
Embodiment two:
The present embodiment and the difference of embodiment one be, the domestic environment quality based on STM32 single-chip microcontroller of the present embodiment
Monitoring device further includes CO gas sensor, the CO gas sensor after AD conversion with it is described
STM32F103 single-chip microcontroller is connected by I/O port.The CO gas sensor includes heating module 1, is set to described add
Si substrate 2 above thermal modules, the silicon oxide film 3 being formed in the Si substrate, the W being set on the silicon oxide film
Film 4, the WO3 nano wire film 5 being formed on the W film, the SnO2 nano thin-film being covered on the WO3 nano wire film 5
6 and two Pt electrodes 7 being set on the SnO2 nano thin-film.
The silicon oxide film 3 with a thickness of 400~500nm, the W film 4 with a thickness of 200~250nm, the WO3
The length of nano wire is 1000~1500nm.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
It imitates embodiment and is applied to other fields, but without departing from the technical solutions of the present invention, according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of domestic environment quality monitoring device based on STM32 single-chip microcontroller, it is characterised in that: including STM32F103 monolithic
Machine, environmental quality measurement module and Wi-Fi module；Each environmental quality measurement module is mono- with the STM32F103 respectively
Piece machine is connected by I/O port, and the STM32F103 single-chip microcontroller is connect with the Wi-Fi module by I/O port.
2. the domestic environment quality monitoring device according to claim 1 based on STM32 single-chip microcontroller, it is characterised in that: institute
The STM32F103 single-chip microcontroller can be transmitted to by serial port protocol for measurement data by stating each environmental quality measurement module；It is described
STM32F103 single-chip microcontroller is able to respond and handles the measurement data received and data pass through serial port protocol transmission by treated
To the Wi-Fi module；The Wi-Fi module can be by correspondingly received to treated data and by http protocol
Reach China Mobile's OneNet platform of internet of things.
3. the domestic environment quality monitoring device according to claim 1 or 2 based on STM32 single-chip microcontroller, it is characterised in that:
The environmental quality measurement module includes carbon dioxide and TVOC gas collecting module and/or PM2.5 sensor and/or temperature and humidity
Sensor and/or formaldehyde sensor and/or benzene sensor and/or ammonia detection module.
4. the domestic environment quality monitoring device according to claim 3 based on STM32 single-chip microcontroller, it is characterised in that: institute
It states carbon dioxide and TVOC gas collecting module is CCS811 sensor, the PM2.5 sensor is akala PMS5003S particle
Object sensor, the Temperature Humidity Sensor are SHT20 digital hygro sensor, and the formaldehyde sensor is akala number formaldehyde
Sensor, the benzene sensor are MQ137 type gas sensor, and the Wi-Fi module is happy prosperous ESP8266 chip.
5. the domestic environment quality monitoring device according to claim 4 based on STM32 single-chip microcontroller, it is characterised in that:
1st pin of the CCS811 sensor meets power supply+5V, and the 2nd pin and the 8th pin meet GND, and the 3rd~5 pin connects respectively
2nd~4 pin of the STM32F103 single-chip microcontroller；
1st pin of the akala PMS5003S particulate matter sensors meets power supply+5V, and the 2nd pin connects GND, the 3rd~6 pin point
Do not connect the STM32F103 single-chip microcontroller the 15th, 16,17,20 pins；
5th pin of the SHT20 digital hygro sensor meets power supply+3.3V, and the 2nd pin meets GND, and the 7th pin is grounded, the
1,6 pins connect the 59th of the STM32F103 single-chip microcontroller the, 58 pins respectively；
1st pin of the akala number formaldehyde sensor meets power supply+5V, and the 2nd pin meets GND, the 3rd, 6,7 pins meet institute respectively
State STM32F103 single-chip microcontroller the 28th, 29,30 pins；
1st pin of the MQ137 type gas sensor meets GND, and what the 3rd pin connect the STM32F103 single-chip microcontroller the 24th draws
Foot, the 4th pin meet power supply+5V；
The prosperous ESP8266 chip of pleasure the 1st, 8 pins connect the 45th of the STM32F103 single-chip microcontroller the, 44 pins respectively, the 2nd
Pin meets power supply+3.3V, and the resistance of the 4th 1 kilo-ohm of pin serial connection is followed by the 43rd pin of the STM32F103 single-chip microcontroller, and the 6th draws
Power supply+3.3V is connected after the resistance of 4.7 kilo-ohms of foot series connection, the 7th pin meets GND.
6. the domestic environment quality monitoring device according to claim 5 based on STM32 single-chip microcontroller, it is characterised in that: also
Including sensor identification circuit, the input terminal of the sensor identification circuit is provided with to be connected for each environmental quality measurement module
The interface connect, the output end of the sensor identification circuit are connect with the STM32F103 single-chip microcontroller by I/O port.
7. the domestic environment quality monitoring device according to claim 6 based on STM32 single-chip microcontroller, it is characterised in that: institute
Stating sensor identification circuit includes 8-3 encoder 74LS348 chip and switching circuit；Draw the 0th~7 of the 74LS348 chip
Foot is connected separately with an interface for each environmental quality measurement module connection, and each interface is connected separately with an institute
State switching circuit, the 74LS348 chip the 9th, 7,6,15 pins connect respectively the STM32F103 single-chip microcontroller the 38th, 39,
40,37 pin.
8. the domestic environment quality monitoring device according to claim 7 based on STM32 single-chip microcontroller, it is characterised in that: institute
Stating switching circuit includes filter resistance, filter capacitor and key switch；One end of the filter resistance connects power supply+3.3V,
The other end of filter resistance connects simultaneously to be connect described in one end of the filter capacitor, one end of the key switch and one
Mouthful, the other end of the other end of the filter capacitor and the key switch is grounded.
9. according to claim 1 or 2 or 4~8 described in any item domestic environment quality-monitoring dresses based on STM32 single-chip microcontroller
Set, it is characterised in that: further include CO gas sensor, the CO gas sensor after AD conversion with it is described
STM32F103 single-chip microcontroller is connected by I/O port；The CO gas sensor includes heating module, is set to the heating
Si substrate above module, the silicon oxide film being formed in the Si substrate, the W film being set on the silicon oxide film,
The WO being formed on the W film3Nano wire film is covered in the WO3SnO on nano wire film2Nano thin-film, Yi Jishe
It is placed in the SnO2Two Pt electrodes on nano thin-film.
10. the domestic environment quality monitoring device according to claim 9 based on STM32 single-chip microcontroller, it is characterised in that: institute
State silicon oxide film with a thickness of 400~500nm, the W film with a thickness of 200~250nm, the WO3The length of nano wire
For 1000~1500nm.
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Cited By (1)
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| CN112179952A (en) * | 2020-09-25 | 2021-01-05 | 天津扬帆科技有限公司 | Anti-interference formaldehyde detection system for monitoring formaldehyde concentration in real time |
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Application publication date: 20190115 |