CN209945417U - Distributed indoor environment acquisition system - Google Patents
Distributed indoor environment acquisition system Download PDFInfo
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- CN209945417U CN209945417U CN201920768340.7U CN201920768340U CN209945417U CN 209945417 U CN209945417 U CN 209945417U CN 201920768340 U CN201920768340 U CN 201920768340U CN 209945417 U CN209945417 U CN 209945417U
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Abstract
The utility model discloses a distributed indoor environment acquisition system, which comprises an environment data processing device and an environment data display device, and further comprises a plurality of environment data acquisition devices, wherein the environment data acquisition devices are used for acquiring indoor environment data, and the environment data comprises temperature data, humidity data, illumination data and carbon dioxide concentration data; the power supply module is used for supplying power to the data acquisition module and the data transmission module; the data acquisition module is used for acquiring indoor environment data; the data transmission module is used for transmitting the indoor environment data to the environment processing device; the environment data processing device is used for receiving the indoor environment data and then sending the indoor environment data to the environment data display device; the environment data display device is used for outputting indoor environment data; the utility model provides a pair of indoor environment collection system of distributing type adopts the distributed characteristics of arranging, can be nimble install according to different environmental monitoring demands.
Description
Technical Field
The utility model relates to an indoor environment collection system, concretely relates to distributing type indoor environment collection system.
Background
The existing indoor environment information acquisition system is mostly centralized, a plurality of sensors are integrated together, fixed-point acquisition is carried out, but different environment information needs to be detected at different positions many times, the centralized acquisition is difficult to flexibly install according to user requirements, and the environmental information is difficult to reflect scientifically and effectively. In addition, the power supply scheme in the environment acquisition system in the prior art usually has only one power supply, the reliability is not high, when the power supply fails to work normally, the whole environment acquisition system is paralyzed, so that the environmental data is lost or cannot be uploaded, and the normal work of the indoor environment information acquisition system is influenced.
Disclosure of Invention
An object of the utility model is to provide a distributing type indoor environment collection system for solve current indoor environment information collection system and be mostly centralized and the not scheduling problem of power supply reliability.
In order to realize the task, the utility model discloses a following technical scheme:
a distributed indoor environment acquisition system comprises an environment data processing device and an environment data display device, and further comprises a plurality of environment data acquisition devices;
the environment data acquisition device is used for acquiring indoor environment data, and the environment data comprises temperature data, humidity data, illumination data and carbon dioxide concentration data;
the environment data acquisition device comprises a power supply module, a data acquisition module and a data transmission module;
the power supply module is used for supplying power to the data acquisition module and the data transmission module;
the data acquisition module is used for acquiring the indoor environment data;
the data transmission module is used for transmitting the indoor environment data to an environment processing device;
the environment data processing device is used for receiving indoor environment data and then sending the indoor environment data to the environment data display device;
the environment data display device is used for outputting the indoor environment data.
Furthermore, the environment data processing device comprises a power supply module and a data forwarding module;
the power supply module is used for supplying power to the data forwarding module;
and the data forwarding module is used for receiving the indoor environment data and then sending the indoor environment data to the environment data display device.
Furthermore, the power supply module comprises a power supply interface, a standby power supply, a power supply switching circuit, a voltage stabilizing circuit and a voltage reducing circuit;
the power supply interface is used for providing input voltage for the power supply module;
the standby power supply is used for providing standby input voltage for the power supply module;
the power supply switching circuit is used for selectively inputting the input voltage or the standby input voltage into the voltage stabilizing circuit to obtain a selected voltage;
the voltage stabilizing circuit filters the selected voltage to obtain a stabilized voltage;
the voltage reduction circuit is also used for reducing the voltage of the stabilized voltage to obtain reduced voltage;
the voltage stabilizing circuit is also used for filtering the reduced voltage to obtain output voltage.
Furthermore, the power switching circuit comprises a power selection unit and a power conduction unit;
the power supply selection unit is used for detecting the magnitude of the input voltage and outputting a power supply conducting signal, wherein the power supply conducting signal comprises an input voltage conducting signal or a standby input voltage conducting signal;
the power supply conducting unit is used for controlling the input voltage or the standby input voltage to be input into the voltage stabilizing circuit according to the power supply conducting signal.
Furthermore, the power selection unit comprises a first triode and a second triode;
the first triode is used for detecting the size of input voltage, and outputting an input voltage conduction signal when the input voltage is greater than 1V; when the input voltage is less than or equal to 1V, the second triode outputs a standby input voltage conduction signal;
the power supply conduction unit comprises a diode and an MOS (metal oxide semiconductor) tube;
the diode is used for inputting the input voltage into the voltage stabilizing circuit according to the input voltage conduction signal;
the MOS tube is used for inputting the standby input voltage into the voltage stabilizing circuit according to the standby input voltage conducting signal.
Furthermore, the voltage stabilizing circuit comprises a pre-filter circuit and an output filter circuit;
the pre-filter circuit comprises a first capacitor and a second capacitor which are connected in parallel;
the output filter circuit comprises a third capacitor, a fourth capacitor and a first voltage-regulator tube which are connected in parallel.
Furthermore, the voltage reduction circuit comprises a voltage reduction triode and a second voltage-regulator tube connected with the voltage reduction triode in series;
the voltage reduction circuit also comprises a resistor connected in parallel between the base electrode and the collector electrode of the voltage reduction triode.
Further, the data transmission module and the data forwarding module are both ZigBee wireless modules.
Compared with the prior art, the utility model following technological effect has:
1. the utility model provides a distributed indoor environment acquisition system, which is provided with a plurality of environment data acquisition devices, adopts the distributed arrangement characteristic, and can be flexibly installed according to different environment monitoring requirements;
2. the utility model provides a power module in the distributed indoor environment acquisition system, which is provided with the standby power supply, can still ensure the normal work of the system when the external power supply voltage is insufficient or the power is cut off;
3. the utility model provides a pair of among distributing type indoor environment collection system through having set up power supply switching circuit among the power module, just can be according to input voltage and reserve input voltage's size through logic digital circuit, switch supply voltage in a flexible way, prevent that the system from falling the electricity, cause data loss.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a distributed indoor environment acquisition system provided in an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of an environmental data acquisition device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal structure of a power module according to an embodiment of the present invention.
The reference numbers in the figures represent: j1-power interface, BT 1-standby power supply, Q1-MOS tube, Q2-buck triode, Q3-second triode, Q4-first triode, D1-diode, D2-first voltage regulator tube, D3-second voltage regulator tube, C1-first capacitor, C2-fourth capacitor, C3-second capacitor, C4-third capacitor and R4-resistor.
Detailed Description
As shown in fig. 1, in this embodiment, a distributed indoor environment acquisition system is disclosed, which includes an environment data processing device, an environment data display device, and a plurality of environment data acquisition devices.
In this embodiment, the number of the environment data collecting devices is at least two, which realizes the collection of the distributed indoor environment information, and the environment data collecting devices (i.e. the terminal nodes) are flexibly arranged, and can be installed in indoor buildings such as factories, offices, classrooms, and stadiums, and when being arranged in the offices or classrooms, the environment data collecting devices are set to be about 81 cm higher from the ground (obtained by finding the average of the sitting heights), and the heights can reflect the actual breathing air condition of people in the rooms. In factories, gymnasiums, etc., it is set to be 1.6 meters (standing respiratory tract height) from the ground. For not interfering normal work and life and being convenient for install, the environmental data acquisition device is usually arranged at the edge of the wall and adopts a sticking and hanging type.
In addition, the setting density of the environmental data collection device may be set as follows: for indoor environments with small areas, such as classrooms, offices and laboratories, one room is arranged; for factories, gymnasiums, canteens where the area of a single room is large, the density is set to one per 500 square meters, depending on the number and position of the vents (windows, doors, etc.) and the number of people.
The environment data processing device and the environment data display device are arranged in principle one, and can be arranged indoors within 200M of the relative distance between the environment data processing device and all the environment data acquisition devices, and the specific preference is selected. The placement positions of the environmental data processing device and the environmental data display device may be set as follows: (1) height position: an area arranged about 1.6m from the ground (average eye height) was selected based on the average height data of most people. (2) Plane position: are located in vacant areas and are conspicuous, typically a doorway area is selected. Or can be installed at any position according to actual requirements.
The environment data acquisition device is used for acquiring indoor environment data, and the environment data comprises temperature data, humidity data, illumination data and carbon dioxide concentration data;
the environment data acquisition device comprises a power supply module, a data acquisition module and a data transmission module;
the power supply module is used for supplying power to the data acquisition module and the data transmission module;
the data acquisition module is used for acquiring indoor environment data;
the data transmission module is used for transmitting the indoor environment data to the environment processing device;
the environment data processing device is used for receiving the indoor environment data and then sending the indoor environment data to the environment data display device;
the environment data display device is used for outputting indoor environment data.
In this embodiment, the environmental data collection device is as shown in fig. 2, wherein the data collection module includes a temperature and humidity sensor, an illumination intensity sensor and a carbon dioxide concentration sensor.
The temperature and humidity sensor is a DHT22 type sensor, the illumination intensity sensor is a BH1750 type sensor, and the carbon dioxide concentration sensor is a CJMCU-811 type sensor.
The data acquisition module may also include a PM2.5 concentration sensor, a particulate matter concentration sensor, a toxic gas sensor, a barometric pressure sensor, and a noise sensor, and thus the environmental data may also include PM2.5 concentration, particulate matter concentration, toxic gas, barometric pressure, and noise.
In this embodiment, the data transmission module may be a wireless transmission module such as a WIFI module, a bluetooth module, or a ZigBee module, or may be a wired transmission module connected by a line.
In order to reduce the volume of the environment data acquisition device and improve the installation flexibility, a ZigBee module, specifically a CC2530ZigBee module is selected as the data transmission module.
In this embodiment, the environment data display device is configured to be connected to the environment data processing device in a wireless or wired manner, and to receive and display the indoor environment data from the environment data processing device.
In this embodiment, some or all of the terminals in the one or more environment data display devices may be further connected to the one or more environment data processing devices in a wireless or wired manner, so that the environment data may be directly received indoors from the one or more environment data processing devices. The environment data display device may be a display terminal (such as a large-sized display screen) or the like.
Preferably, the environmental data display device is a 0.96 inch OLED display screen.
Optionally, the environment data processing apparatus includes a power module and a data forwarding module;
the power supply module is used for supplying power to the data forwarding module;
and the data forwarding module is used for receiving the indoor environment data and then sending the indoor environment data to the environment data display device.
In this embodiment, the data forwarding module in the environmental data processing apparatus may be a wireless transmission module such as a WIFI module, a bluetooth module, or a ZigBee module, or may be a wired transmission module connected by a line.
In order to improve the flexibility of system installation, as an optimal real-time mode, the data forwarding module is a ZigBee module.
Optionally, the power supply module includes a power supply interface J1, a standby power supply BT1, a power supply switching circuit, a voltage stabilizing circuit, and a voltage reducing circuit;
the power interface J1 is used for providing input voltage for the power module;
the standby power supply BT1 is used for providing standby input voltage for the power supply module;
the power supply switching circuit is used for selectively inputting the input voltage or the standby input voltage into the voltage stabilizing circuit to obtain a selected voltage;
the voltage stabilizing circuit filters the selected voltage to obtain a stabilized voltage;
the voltage reduction circuit is also used for reducing the voltage of the stabilized voltage to obtain reduced voltage;
the voltage stabilizing circuit is also used for filtering the reduced voltage to obtain output voltage.
In the present embodiment, as shown in fig. 3, the power interface J1 is used for connecting with a 5V power adapter and inputting 5V voltage into the power module; the standby power supply BT1 is used for placing dry batteries and inputting 5V voltage into the power supply module.
The power supply switching circuit is used for selectively inputting the input voltage or the standby input voltage into the voltage stabilizing circuit to obtain a selected voltage;
optionally, the power switching circuit includes a power selecting unit and a power conducting unit;
the power supply selection unit is used for detecting the magnitude of input voltage and outputting a power supply conducting signal, wherein the power supply conducting signal comprises an input voltage conducting signal or a standby input voltage conducting signal;
the power supply conducting unit is used for controlling the input voltage or the standby input voltage to be input into the voltage stabilizing circuit according to the power supply conducting signal.
In this embodiment, the power selection unit may be a switch, a chip, a transistor, or the like, which performs switching according to the voltage level.
Optionally, the power selection unit includes a first transistor Q4 and a second transistor Q3;
the first triode Q3 is used for detecting the size of the input voltage, and when the input voltage is larger than 1V, an input voltage conducting signal is output; when the input voltage is less than or equal to 1V, the second triode Q3 outputs a standby input voltage conducting signal;
the power supply conducting unit comprises a diode D1 and a MOS tube Q1;
the diode D1 is used for inputting the input voltage into the voltage stabilizing circuit according to the input voltage conduction signal;
the MOS transistor Q1 is used for inputting the standby input voltage into the voltage stabilizing circuit according to the standby input voltage conducting signal.
In this embodiment, as shown in fig. 3, when no input voltage is input in the power interface J1, the voltage at the base of the first transistor Q4 is 0, the first transistor Q4 is not turned on, the standby input voltage VBAT generated by the standby power BT1 is divided by the resistor R5 and the resistor R7 to generate a voltage drop greater than 0.7V at the base of the second transistor Q3, the second transistor Q3 is turned on, the resistor R2 limits the current to prevent the collector current from damaging the second transistor Q3 due to excessive collector current, the G-pole voltage of the MOS transistor Q1 is 0V, the MOS transistor Q1 is turned on, the standby input voltage VBAT passes through the DS pole of the MOS transistor Q1 to output Vin, and since there is almost no voltage drop when the MOS transistor is turned on, the standby input voltage VBAT this time is input to the subsequent circuit.
When the power interface J1 has input voltage input, and the input voltage is greater than about 1V, a voltage drop of 0.7V is generated on the base of the first triode Q4, the first triode Q4 is turned on, the resistor R3 limits the current, so that the first triode Q4 is prevented from being damaged by overlarge collector current, the voltage drop of the base of the second triode Q3 is 0, the second triode Q3 is cut off, the high level of the G on the MOS transistor Q1, Vgs is greater than 0, the DS of the MOS transistor Q1 is cut off, the standby input voltage VBAT output is turned off, the power interface J1 supplies Vin through the diode D1, and the standby power BT1 does not supply power at this time.
In this embodiment, the resistor R6 is a 4K R0805 type resistor, the resistor R3 is a 10K R0805 type resistor, the resistor R2 is a 100K R0805 type resistor, the resistor R5 is a 4K R0805 type resistor, the resistor R7 is a 10K R0805 type resistor, the first triode Q4 is an S8050 type triode, the second triode Q3 is an S8050 type triode, the MOS transistor Q1 is an MOSFET-P type MOS transistor, and the diode D1 is an SS12 diode.
Optionally, the voltage stabilizing circuit includes a pre-filter circuit and an output filter circuit;
the pre-filter circuit comprises a first capacitor C1 and a second capacitor C3 which are connected in parallel;
the output filter circuit comprises a third capacitor C4, a fourth capacitor C2 and a first voltage regulator tube D2 which are connected in parallel.
In this embodiment, the first capacitor C1 is a 10uF capacitor, the second capacitor C3 is a 0.1uF capacitor, the third capacitor C4 is a 10uF capacitor, the fourth capacitor C2 is a 0.1uF capacitor, and the first voltage regulator D2 is a 1N4728 diode.
Optionally, the step-down circuit includes a step-down transistor Q2 and a second regulator D3 connected in series with the step-down transistor Q2;
the buck circuit also includes a resistor R4 connected in parallel between the base and collector of the buck transistor Q2.
In this embodiment, an input voltage or a standby input voltage forms a loop through the resistor R4 and the voltage regulator tube D3, so that a voltage difference is generated between the base and the emitter of the voltage-reducing transistor Q2, the voltage-reducing transistor Q2 is turned on, the output voltage is about 3.4V, a stable 3.3V voltage can be obtained after the voltage is stabilized by the first voltage regulator tube D2, and the 3.3V voltage is supplied to the data acquisition module, the data transmission module and the data forwarding module for power supply.
Claims (8)
1. A distributed indoor environment acquisition system comprises an environment data processing device and an environment data display device, and is characterized by also comprising a plurality of environment data acquisition devices;
the environment data acquisition device is used for acquiring indoor environment data, and the environment data comprises temperature data, humidity data, illumination data and carbon dioxide concentration data;
the environment data acquisition device comprises a power supply module, a data acquisition module and a data transmission module;
the power supply module is used for supplying power to the data acquisition module and the data transmission module;
the data acquisition module is used for acquiring the indoor environment data;
the data transmission module is used for transmitting the indoor environment data to an environment processing device;
the environment data processing device is used for receiving indoor environment data and then sending the indoor environment data to the environment data display device;
the environment data display device is used for outputting the indoor environment data.
2. The distributed indoor environment acquisition system of claim 1 wherein the environment data processing means comprises a power module and a data forwarding module;
the power supply module is used for supplying power to the data forwarding module;
and the data forwarding module is used for receiving the indoor environment data and then sending the indoor environment data to the environment data display device.
3. A distributed indoor environment acquisition system as claimed in claim 1 or 2, wherein said power supply module comprises a power supply interface (J1), a backup power supply (BT1), a power switching circuit, a voltage stabilizing circuit and a voltage dropping circuit;
the power supply interface (J1) is used for providing input voltage for the power supply module;
the standby power supply (BT1) is used for providing standby input voltage for the power supply module;
the power supply switching circuit is used for selectively inputting the input voltage or the standby input voltage into the voltage stabilizing circuit to obtain a selected voltage;
the voltage stabilizing circuit filters the selected voltage to obtain a stabilized voltage;
the voltage reduction circuit is also used for reducing the voltage of the stabilized voltage to obtain reduced voltage;
the voltage stabilizing circuit is also used for filtering the reduced voltage to obtain output voltage.
4. The distributed indoor environment acquisition system of claim 3 wherein the power switching circuit comprises a power selection unit and a power conduction unit;
the power supply selection unit is used for detecting the magnitude of the input voltage and outputting a power supply conducting signal, wherein the power supply conducting signal comprises an input voltage conducting signal or a standby input voltage conducting signal;
the power supply conducting unit is used for controlling the input voltage or the standby input voltage to be input into the voltage stabilizing circuit according to the power supply conducting signal.
5. The distributed indoor environment acquisition system of claim 4, wherein the power selection unit comprises a first transistor (Q4) and a second transistor (Q3);
the first triode (Q4) is used for detecting the size of input voltage, and when the input voltage is greater than 1V, an input voltage conduction signal is output; when the input voltage is less than or equal to 1V, the second triode (Q3) outputs a standby input voltage conduction signal;
the power supply conducting unit comprises a diode (D1) and a MOS (Q1);
the diode (D1) is used for inputting the input voltage into the voltage stabilizing circuit according to the input voltage conduction signal;
the MOS tube (Q1) is used for inputting the standby input voltage into the voltage stabilizing circuit according to the standby input voltage conducting signal.
6. The distributed indoor environment acquisition system of claim 3 wherein the voltage regulator circuit comprises a pre-filter circuit and an output filter circuit;
the pre-filter circuit comprises a first capacitor (C1) and a second capacitor (C3) which are connected in parallel;
the output filter circuit comprises a third capacitor (C4), a fourth capacitor (C2) and a first voltage regulator tube (D2) which are connected in parallel.
7. A distributed indoor environment acquisition system as claimed in claim 3 wherein said buck circuit comprises a buck transistor (Q2) and a second regulator tube (D3) connected in series with the buck transistor (Q2);
the step-down circuit also comprises a resistor (R4) connected between the base electrode and the collector electrode of the step-down transistor (Q2) in parallel.
8. A distributed indoor environment acquisition system as claimed in claim 2, wherein said data transmission module and said data forwarding module are both ZigBee wireless modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768340.7U CN209945417U (en) | 2019-05-24 | 2019-05-24 | Distributed indoor environment acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768340.7U CN209945417U (en) | 2019-05-24 | 2019-05-24 | Distributed indoor environment acquisition system |
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| Publication Number | Publication Date |
|---|---|
| CN209945417U true CN209945417U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920768340.7U Expired - Fee Related CN209945417U (en) | 2019-05-24 | 2019-05-24 | Distributed indoor environment acquisition system |
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| CN (1) | CN209945417U (en) |
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2019
- 2019-05-24 CN CN201920768340.7U patent/CN209945417U/en not_active Expired - Fee Related
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Granted publication date: 20200114 |