CN211927763U - Indoor environment remote monitoring device - Google Patents
Indoor environment remote monitoring device Download PDFInfo
- Publication number
- CN211927763U CN211927763U CN202020609270.3U CN202020609270U CN211927763U CN 211927763 U CN211927763 U CN 211927763U CN 202020609270 U CN202020609270 U CN 202020609270U CN 211927763 U CN211927763 U CN 211927763U
- Authority
- CN
- China
- Prior art keywords
- sensor
- control chip
- remote monitoring
- combustible gas
- monitoring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 229920001276 Ammonium polyphosphate Polymers 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 59
- 238000009423 ventilation Methods 0.000 claims description 23
- 229920002574 CR-39 Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000002341 toxic gas Substances 0.000 claims description 4
- 101700028248 OS35 Proteins 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 241000256844 Apis mellifera Species 0.000 description 3
- 210000000056 organs Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Abstract
The utility model relates to an indoor environment remote monitoring device belongs to intelligent household equipment technical field. The indoor environment remote monitoring device comprises a temperature and humidity sensor, a CO sensor, a combustible gas sensor, a control chip, a WiFi module and a display screen; the input end of the control chip is connected with a temperature and humidity sensor, a CO sensor and a combustible gas sensor; the output end of the control chip is connected with a display screen and a WiFi module; the WiFi module and the cloud server perform remote data transmission; data transmission is achieved between the cloud server and the mobile phone APP through a communication protocol. The remote monitoring device for the indoor environment is ingenious in design and reasonable in structure, data transmission can be completed without a mobile phone card, a plurality of indoor environment data can be comprehensively detected by the remote monitoring device, and the problem of resource waste existing in the existing home remote monitoring control system is solved; the functions of warning and warning are achieved, and the use requirements of people are met.
Description
Technical Field
The utility model relates to an indoor environment remote monitoring device belongs to intelligent household equipment technical field.
Background
In the process of household life, along with the improvement of the living standard of people, the smart home is also accepted and used by more and more people. The core of the smart home is remote monitoring of indoor environment. At present, there are many remote monitoring devices on the market, such as a home remote monitoring control system disclosed by the authorized bulletin number CN 20277159U; the data information is transmitted through the GSM module, the requirement of indoor environment remote monitoring can be met to a certain extent, but a mobile phone card is required to be prepared separately to be matched with the GSM module, and the problem of resource waste exists. In addition, although the existing home remote monitoring device achieves the purpose of remote monitoring, the existing home remote monitoring device cannot meet the requirement of warning. In addition, the existing remote monitoring device can only monitor a single index, and the problem of single monitoring function exists. Therefore, in order to solve the above problems of the existing home remote monitoring and controlling system, it is necessary to develop a new indoor environment remote monitoring device to meet the use requirements of people.
Disclosure of Invention
The utility model aims to provide a: the utility model provides a design benefit, it is rational in infrastructure to solve the indoor environment remote monitoring device of the extravagant resource that current house remote monitoring control system exists and the problem of can not warning.
The technical scheme of the utility model is that:
a remote monitoring device for an indoor environment comprises a temperature and humidity sensor, a CO sensor, a combustible gas sensor, a control chip, a WiFi module and a display screen; the method is characterized in that: the input end of the control chip is connected with a temperature and humidity sensor, a CO sensor and a combustible gas sensor; the output end of the control chip is connected with a display screen and a WiFi module; the WiFi module and the cloud server perform remote data transmission; data transmission is realized between the cloud server and the mobile phone APP through a communication protocol; the model of the control chip is a STM32 single chip microcomputer of a microprocessor STM32F103ZET6 based on a Cortex-M3 kernel, and the STM32 single chip microcomputer can receive and process data transmitted by a temperature and humidity sensor, a CO sensor and a combustible gas sensor and display the processed data on a display screen in real time; the control chip can also transmit the data to the cloud server through the WiFi module, and then the data are transmitted to the mobile phone APP through the cloud server to achieve remote monitoring.
The temperature and humidity sensor is a DHT11 sensor, and an output pin Dout of the DHT11 sensor is connected with a PG11 pin of the control chip; the DHT11 sensor measures the temperature and humidity of the current environment by adopting the principle of reading time sequence, and the acquisition range is as follows: temperature 0-50 ℃ ± 2 ℃, humidity: 20-90% RH.
The CO sensor is of an MQ7 type, an output pin DO of an MQ7 sensor is connected with a PA6 pin of a control chip, the MQ7 sensor reads the voltage of the sensor by adopting an ADC principle to reflect whether CO toxic gas exists in the air at present, the MQ7 sensor detects high and low levels through the control chip so as to detect the environmental CO concentration, the digital interface DO outputs the high level when the CO sensor has no CO gas influence or the gas concentration does not exceed a set threshold, and the digital interface DO outputs the low level when the CO gas influence exceeds the set threshold.
The model of the combustible gas sensor is MQ2 sensor, an output pin of the MQ2 sensor is connected with a PA1 pin of a control chip, the MQ2 sensor reads the voltage of the sensor by adopting an ADC principle to reflect whether combustible gas exists in the air at present, the conductivity of the MQ2 sensor is increased along with the increase of the gas concentration, the resistance of the MQ2 sensor is the reciprocal of the conductivity, and the resistance is reduced along with the increase of the gas concentration; the characteristic of the sensor is equivalent to a slide rheostat, the MQ2 sensor, and the lower the output resistance is, the larger the output analog signal is; the range for detecting combustible gas and smoke is 100-10000 ppm.
The display screen is an LCD display screen, the LCD display screen can be used after being connected with the STM32 single chip microcomputer and is connected with pins FSMC _ D0-FSMC _ D15 of the control chip, so that the control chip drives the LCD display screen to display, and a user can monitor various data in real time under the condition of not using mobile phone apps; the LCD screen utilizes the ILI9341 controller, adopts the FSMC function of the control chip, and faithfully reacts the information collected by the temperature and humidity sensor, the CO sensor and the combustible gas sensor to the display screen, so that man-machine friendly interaction is realized.
The model of the WiFi module is ESP8266, TXD, RXD, KEY and LED pins of the WiFi module are respectively connected with PA2, PA3, PA4 and PA15 pins of the control chip, the control chip is connected with the WiFi module through a serial port, and the WiFi module and the cloud server perform wireless data transmission.
The output end of the control chip is connected with a buzzer and a relay module; the relay module is communicated with the indoor ventilation device.
The type of the buzzer is BELL-5, an input pin BEEP of the buzzer is connected with a PB8 pin of the control chip, when the concentration of combustible gas or CO detected by the combustible gas sensor or the CO sensor is higher than a set alarm value, a PB8 pin of the control chip outputs high level, the buzzer 9 is conducted to send out an alarm, and when the detected value is lower than the set alarm value, an output signal of a PB8 pin of the control chip is low level, the buzzer is cut off, and the buzzer stops alarming.
The relay module is a module relay; the input end of the relay module is connected with PB7 of the control chip, the output end of the relay module is connected with an indoor ventilation device, when the combustible gas concentration or the CO concentration detected by the combustible gas sensor or the CO sensor is higher than a set alarm value, a PB7 pin of the control chip outputs a high level to control the relay module to be conducted, and the indoor ventilation device is controlled to start working; when the concentration of the combustible gas or the concentration of CO returns to normal, a PB7 pin of the control chip outputs low level, the relay module is cut off, and the indoor ventilation device stops working.
The utility model has the advantages that:
the indoor environment remote monitoring device is ingenious in design and reasonable in structure, data information is transmitted through WiFi, data transmission can be completed without a mobile phone card, and the remote monitoring device can comprehensively detect a plurality of indoor environment data, so that the problem of resource waste existing in the existing household remote monitoring control system is solved; in addition, the indoor environment remote monitoring device further comprises a buzzer, a relay module and an indoor ventilation device; when this device detects indoor combustible gas concentration or CO concentration superelevation, bee calling organ is when sending out the police dispatch newspaper, and the steerable indoor ventilation unit of relay module is indoor ventilation to reach the effect of warning and department's warning, satisfied people's use needs.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
fig. 3 is a schematic circuit diagram of the present invention.
In the figure: 1. temperature and humidity sensor, 2, CO sensor, 3, combustible gas sensor, 4, singlechip, 5, wiFi module, 6, display screen, 7, cloud ware, 8, cell-phone APP, 9, bee calling organ, 10, relay module, 11, indoor ventilation unit.
Detailed Description
The indoor environment remote monitoring device comprises a temperature and humidity sensor 1, a CO sensor 2, a combustible gas sensor 3, a control chip 4, a WiFi module 5 and a display screen 6 (see the attached figure 1 in the specification).
The control chip 4 is a STM32 single chip microcomputer of a microprocessor STM32F103ZET6 based on a Cortex-M3 kernel.
The input end of the control chip 4 is connected with a temperature and humidity sensor 1, a CO sensor 2 and a combustible gas sensor 3.
The temperature and humidity sensor 1 is a DHT11 sensor, and an output pin Dout of the DHT11 sensor is connected with a PG11 pin of the control chip 4; the DHT11 sensor measures the temperature and humidity of the current environment by adopting the principle of reading time sequence, and the acquisition range is as follows: temperature 0-50 ℃ ± 2 ℃, humidity: 20-90% RH.
The model of the CO sensor 2 is MQ7 sensor, an output pin DO of the MQ7 sensor is connected with a PA6 pin of the control chip 4, the MQ7 sensor reads the sensor voltage by adopting an ADC principle to reflect whether CO toxic gas exists in the air at present, the MQ7 sensor detects high and low levels through the control chip 4 to detect the environmental CO concentration, when the CO sensor 2 has no CO gas influence or the gas concentration does not exceed a set threshold value, the digital interface DO outputs high level, and when the CO gas influence exceeds the set threshold value, the CO sensor 2 outputs low level through the digital interface DO.
The model of the combustible gas sensor 3 is MQ2 sensor, the output pin of the MQ2 sensor is connected with the PA1 pin of the control chip 4, the MQ2 sensor adopts ADC principle to read the sensor voltage to reflect whether combustible gas exists in the air at present, the conductivity of the MQ2 sensor is increased along with the increase of the gas concentration, the resistance of the MQ2 sensor is the reciprocal of the conductivity, and the resistance is reduced along with the increase of the gas concentration; the characteristic of the sensor is equivalent to a slide rheostat, the MQ2 sensor, and the lower the output resistance is, the larger the output analog signal is; the range for detecting combustible gas and smoke is 100-10000 ppm.
The output end of the control chip 4 is connected with a display screen 6 and a WiFi module 5 (see the attached figure 1 in the specification); the display screen 6 is an LCD display screen, the LCD display screen can be used after being connected with the STM32 single chip microcomputer and is connected with pins FSMC _ D0-FSMC _ D15 of the control chip 4, so that the control chip 4 drives the LCD display screen to display, and a user can monitor various data in real time under the condition of not using mobile phone apps; the LCD screen utilizes the ILI9341 controller and the FSMC function of the control chip 4 to faithfully react the information collected by the temperature and humidity sensor 1, the CO sensor 2 and the combustible gas sensor 3 to the display screen 6, so that man-machine friendly interaction is realized.
The model of the WiFi module 5 is ESP8266, TXD, RXD, KEY and LED pins of the WiFi module 5 are respectively connected with PA2, PA3, PA4 and PA15 pins of the control chip 4, the control chip 4 is connected with the WiFi module 5 through a serial port, and the WiFi module 5 wirelessly transmits data with the cloud server 7.
The WiFi module 5 and the cloud server 7 perform remote data transmission; data transmission is realized between the cloud server 7 and the mobile phone APP8 through a communication protocol.
The control chip 4 can receive and process data transmitted by the temperature and humidity sensor 1, the CO sensor 2 and the combustible gas sensor 3, and displays the processed data on the display screen 6 in real time; the control chip 4 can also transmit data to the cloud server 7 through the WiFi module 5, and then transmit the data to the mobile phone APP8 through the cloud server 7 to realize remote monitoring.
The output end of the control chip 4 is connected with a buzzer 9 and a relay module 10; the relay module 10 is communicated with an indoor ventilating device 11 (see the attached figure 1 of the specification). The indoor ventilation device 11 is an indoor device, and all indoor ventilation equipment (such as indoor exhaust fans and range hoods) are in the range of the indoor ventilation device 11.
The type of the buzzer 9 is BELL-5, an input pin BEEP of the buzzer 9 is connected with a PB8 pin of the control chip 4, when the concentration of combustible gas or CO detected by the combustible gas sensor 3 or the CO sensor 2 is higher than a set alarm value, a PB8 pin of the control chip 4 outputs high level, the buzzer 9 is switched on to send out an alarm, when the detected value is lower than the set alarm value, a PB8 pin of the control chip 4 outputs a signal of low level, the buzzer 9 is cut off, and the buzzer 9 stops alarming.
The relay module 10 is a module relay; the input end of the relay module 10 is connected with PB7 of the control chip 4, the output end of the relay module 10 is connected with the indoor ventilation device 11, when the combustible gas concentration or CO concentration detected by the combustible gas sensor 3 or the CO sensor 2 is higher than a set alarm value, a PB7 pin of the control chip 4 outputs high level to control the relay module 10 to be conducted, and the indoor ventilation device 11 is controlled to start working; when the combustible gas concentration or the CO concentration returns to normal, the PB7 pin of the control chip 4 outputs a low level, the relay module 10 is turned off, and the indoor ventilation device 11 stops working.
When the indoor environment remote monitoring device works, the temperature and humidity sensor 1 measures the temperature and humidity of the current environment by adopting the time sequence reading principle and transmits data to the control chip 4.
The CO sensor 2 and the combustible gas sensor 3 adopt an ADC principle to read the sensor voltage to reflect whether CO toxic gas and combustible gas exist in the current air or not, and transmit data to the control chip 4.
The control chip 4 displays the processed data in real time through the display screen 6. The control chip 4 remotely transmits the processed data to the cloud server 7 through the WiFi module 5. Cell-phone APP8 and cloud server 7 pass through the both-way transmission of communication protocol realization data, and cell-phone APP8 can read the real-time data on the cloud server 7, and then shows in real time on cell-phone APP, and cell-phone APP8 also can long-range alarm value parameter of setting to on transmitting alarm value to cloud server 7, cloud server 7 sends alarm value parameter to control chip 4 through wiFi module 5, and then changes and predetermines alarm value.
When the combustible gas concentration or the CO concentration detected by the combustible gas sensor 3 or the CO sensor 2 is higher than a set alarm value, the control chip 4 controls the buzzer 9 to be conducted, and the buzzer 9 gives an alarm. Meanwhile, the control chip 4 controls the relay module 10 to be conducted, and the indoor ventilation device 11 starts to work.
When the combustible gas concentration or the CO concentration returns to normal, the PB7 pin of the control chip 4 outputs a low level, the relay module 10 is turned off, and the indoor ventilation device 11 stops working.
The indoor environment remote monitoring device is ingenious in design and reasonable in structure, data information is transmitted through WiFi, data transmission can be completed without a mobile phone card, and the remote monitoring device can comprehensively detect a plurality of indoor environment data, so that the problem of resource waste existing in the existing household remote monitoring control system is solved; in addition, the indoor environment remote monitoring device further comprises a buzzer and a relay module, wherein the relay module and the indoor ventilation device are connected with each other; when this device detects indoor combustible gas concentration and CO concentration superelevation, bee calling organ is when sending out the police dispatch newspaper, and the steerable indoor ventilation unit of relay module is indoor ventilation to reach the effect of warning and department's warning, satisfied people's use needs.
Claims (9)
1. A remote monitoring device for an indoor environment comprises a temperature and humidity sensor (1), a CO sensor (2), a combustible gas sensor (3), a control chip (4), a WiFi module (5) and a display screen (6); the method is characterized in that: the input end of the control chip (4) is connected with a temperature and humidity sensor (1), a CO sensor (2) and a combustible gas sensor (3); the output end of the control chip (4) is connected with a display screen (6) and a WiFi module (5); the WiFi module (5) and the cloud server (7) carry out remote data transmission; data transmission is realized between the cloud server (7) and the mobile phone APP (8) through a communication protocol; the type of the control chip (4) is a STM32 single chip microcomputer of a microprocessor STM32F103ZET6 based on a Cortex-M3 kernel, the STM32 single chip microcomputer can receive and process data transmitted by the temperature and humidity sensor (1), the CO sensor (2) and the combustible gas sensor (3), and the processed data are displayed on the display screen (6) in real time; the control chip (4) can also transmit data to the cloud server (7) through the WiFi module (5), and then the data are transmitted to the mobile phone APP (8) through the cloud server (7) to achieve remote monitoring.
2. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the type of the temperature and humidity sensor (1) is a DHT11 sensor, and an output pin Dout of the DHT11 sensor is connected with a PG11 pin of the control chip (4); the DHT11 sensor measures the temperature and humidity of the current environment by adopting the principle of reading time sequence, and the acquisition range is as follows: temperature 0-50 ℃ ± 2 ℃, humidity: 20-90% RH.
3. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the CO sensor (2) is an MQ7 sensor, an output pin DO of the MQ7 sensor is connected with a PA6 pin of a control chip (4), the MQ7 sensor reads the voltage of the sensor by adopting an ADC principle to reflect whether CO toxic gas exists in the air currently, the MQ7 sensor detects high and low levels through the control chip (4) so as to detect the environmental CO concentration, when the CO sensor (2) has no CO gas influence or the gas concentration does not exceed a set threshold value, a digital interface DO port outputs high levels, and when the CO gas influence exceeds the set threshold value, the CO sensor (2) digital interface DO outputs low levels.
4. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the model of the combustible gas sensor (3) is MQ2 sensor, the output pin of the MQ2 sensor is connected with the PA1 pin of the control chip (4), the MQ2 sensor adopts ADC principle to read the sensor voltage to reflect whether combustible gas exists in the air at present, the conductivity of the MQ2 sensor is increased along with the increase of the gas concentration, the resistance of the MQ2 sensor is the reciprocal of the conductivity, and the resistance is reduced along with the increase of the gas concentration; the lower the output resistance of the MQ2 sensor, the larger the analog signal output; the range for detecting combustible gas and smoke is 100-10000 ppm.
5. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the display screen (6) is an LCD display screen, the LCD display screen can be used after being connected with the STM32 single chip microcomputer and is connected with pins FSMC _ D0-FSMC _ D15 of the control chip (4), so that the control chip (4) drives the LCD display screen to display, and a user can monitor various data in real time without using a mobile phone APP (8); the LCD screen utilizes the ILI9341 controller and adopts the FSMC function of the control chip (4) to faithfully react the information collected by the temperature and humidity sensor (1), the CO sensor (2) and the combustible gas sensor (3) to the display screen (6).
6. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the model of the WiFi module (5) is ESP8266, TXD, RXD, KEY and LED pins of the WiFi module are respectively connected with PA2, PA3, PA4 and PA15 pins of the control chip (4), the control chip (4) is connected with the WiFi module (5) through a serial port, and the WiFi module (5) and the cloud server (7) perform wireless data transmission.
7. The remote monitoring device for indoor environment as claimed in claim 1, wherein: the output end of the control chip (4) is connected with a buzzer (9) and a relay module (10); the relay module (10) is communicated with an indoor ventilation device (11).
8. An indoor environment remote monitoring device according to claim 7, characterized in that: the type of the buzzer (9) is BELL-5, an input pin BEEP of the buzzer (9) is connected with a PB8 pin of the control chip (4), when the concentration of combustible gas or CO detected by the combustible gas sensor (3) or the CO sensor (2) is higher than a set alarm value, a PB8 pin of the control chip (4) is output at a high level, the buzzer (9) is conducted to send out an alarm, and when the detected value is lower than the set alarm value, an output signal of a PB8 pin of the control chip (4) is at a low level, the buzzer (9) is cut off, and the buzzer (9) stops giving an alarm.
9. An indoor environment remote monitoring device according to claim 7, characterized in that: the relay module (10) is a module relay; the input end of the relay module (10) is connected with PB7 of the control chip (4), the output end of the relay module (10) is connected with the indoor ventilation device (11), when the combustible gas concentration or CO concentration detected by the combustible gas sensor (3) or the CO sensor (2) is higher than a set alarm value, a PB7 pin of the control chip (4) outputs high level to control the relay module (10) to be conducted, and the indoor ventilation device (11) is controlled to start working; when the concentration of the combustible gas or the concentration of CO returns to normal, a PB7 pin of the control chip (4) outputs low level, the relay module (10) is cut off, and the indoor ventilation device (11) stops working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020609270.3U CN211927763U (en) | 2020-04-22 | 2020-04-22 | Indoor environment remote monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020609270.3U CN211927763U (en) | 2020-04-22 | 2020-04-22 | Indoor environment remote monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211927763U true CN211927763U (en) | 2020-11-13 |
Family
ID=73328643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020609270.3U Active CN211927763U (en) | 2020-04-22 | 2020-04-22 | Indoor environment remote monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211927763U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515155A (en) * | 2021-07-12 | 2021-10-19 | 昆明理工大学 | Multi-path intelligent indoor safety detection system and method |
-
2020
- 2020-04-22 CN CN202020609270.3U patent/CN211927763U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515155A (en) * | 2021-07-12 | 2021-10-19 | 昆明理工大学 | Multi-path intelligent indoor safety detection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202871053U (en) | Wireless monitoring apparatus | |
| CN204759244U (en) | Multi -functional wisdom office system | |
| CN206075074U (en) | A kind of Laboratory Monitoring System | |
| CN204667612U (en) | Based on the domestic environment control device of Internet of Things | |
| CN104200601A (en) | Automatic fire alarm system based on 51 single-chip processor | |
| CN101957618A (en) | Intelligent home control system | |
| CN211927763U (en) | Indoor environment remote monitoring device | |
| CN204189057U (en) | A kind of indoor environment intelligent control system | |
| CN207096203U (en) | A kind of environmental parameter sensor and ambient parameter detecting system | |
| CN204667146U (en) | Based on the domestic environment monitoring device of Internet of Things | |
| CN104914899A (en) | Multifunctional intelligent office system | |
| CN206757361U (en) | A kind of Indoor Environment Detection control system based on internet | |
| CN204667149U (en) | A kind of domestic environment control device based on Internet of Things | |
| CN201796023U (en) | Remote environment and anti-theft monitoring system for greenhouses | |
| CN209895157U (en) | Fire control thing allies oneself with equipment data collection station | |
| CN209961749U (en) | Indoor harmful gas monitoring system based on ZigBee | |
| CN207317202U (en) | Intelligent fresh air ventilator | |
| CN203350752U (en) | A universal monitor | |
| CN203706367U (en) | Combustible gas detection system with remote alarm function | |
| CN203101308U (en) | Oxygen online monitoring device for oxygen generation systems of medical centers | |
| CN203479787U (en) | Indoor environment quality monitoring system based on wireless sensor | |
| CN205579875U (en) | Indoor environment intelligent online monitoring system | |
| CN202582607U (en) | Greenhouse canopy environmental monitoring device | |
| CN202133410U (en) | Portable wireless humiture display alarm | |
| CN201464945U (en) | Temperature-humidity monitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |