Wide voltage power supply all-in-one outdoor air particulate matter temperature, humidity and air pressure sensor

Abstract

The utility model discloses a circuit board. A particulate matter detection module, an outdoor temperature, humidity and air pressure detection module, a wide-voltage power supply module and a main control module are integrated on the upper surface of the circuit board, and hollowed-out punched holes are formed in the outer edge of the upper surface of the circuit board and located in the upper side and the lower side of the outdoor temperature, humidity and air pressure detection module; the output end of the wide-voltage power supply module is electrically connected to the input end of the main control module, and the particulate matter detection module and the outdoor temperature, humidity and air pressure detection module are both bidirectionally and electrically connected with the main control module. The device has the advantages that five parameters of air temperature, air humidity, atmospheric pressure, fine particulate matter PM2.5 and fine particulate matter PM10 can be measured, a wide-voltage power supply design is adopted, the device can adapt to DC power supply with the wide voltage of 5-40 V, a PCB adopts a hollowed-out design layout, an air inlet duct is optimized, multiple parameters are integrated, and the integration degree is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to outdoor air detection technical field, concretely is a wide voltage power supply all -in -one outdoor air particulate matter temperature and humidity barometric pressure sensor. BACKGROUND

[0002] Outdoor environment detection is an important means to ensure our daily life and work environment safety, health, through detection, we can understand the pollutant in outdoor air, temperature and humidity and other factors, so as to take effective measures to improve environmental quality, outdoor air detection can provide scientific data support for us, help us create a more comfortable living space;In prior art, the authorized publication number CN 217384546 U proposes an outdoor air pressure sensor, including the protection base, the protection base inner wall is fixedly provided with two lugs, the lug is provided with a groove, the protection base bottom is provided with a threading head, the threading head is provided with a taper head, the taper head is provided with an aperture, the threading head outer thread is sleeved with a fastening sleeve, the fastening sleeve is provided with a compression ring that can extrude the taper head, the outdoor air sensor, the measured element is single, does not have multi-element acquisition function, and the power supply of the sensor is common 5V, 12V, 24V multiple power supply mode, which is not suitable for wide voltage power supply. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem of overcoming the existing defects, provides a wide voltage power supply all -in -one outdoor air particulate matter temperature and humidity barometric pressure sensor, adopts multiple sensitive components, realizes the functional sensor of multiple elements all -in -one, has the measurement of five parameters such as air temperature, air humidity, atmospheric pressure, fine particulate matter PM2.5, fine particulate matter PM10, adopts wide voltage power supply design, can adapt to wide voltage 5-40V DC power supply, can effectively solve the problem in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a wide voltage power supply all -in -one outdoor air particulate matter temperature and humidity barometric pressure sensor, including circuit board;

[0005] Circuit board: the upper surface is integrated with a particulate matter detection module, an outdoor temperature and humidity pressure detection module, a wide voltage power supply module and a main control module respectively, the upper surface of the circuit board is provided with a hollow punched hole, the hollow punched hole is located on the upper and lower sides of the outdoor temperature and humidity pressure detection module, the output end of the wide voltage power supply module is electrically connected to the input end of the main control module, the particulate matter detection module and the outdoor temperature and humidity pressure detection module are bidirectionally electrically connected with the main control module, a plurality of sensitive components are adopted, a functional sensor with multiple elements is realized, five parameters of air temperature, air humidity, atmospheric pressure, fine particulate matter PM2.5 and fine particulate matter PM10 are measured, a wide voltage power supply design is adopted, DC direct current power supply of wide voltage 5-40V can be adapted, the PCB board adopts a hollow design layout, an air inlet duct is optimized, air circulation is fast, the sensor can quickly respond, a plurality of sensor chips are integrated, air temperature, air humidity, atmospheric pressure, PM2.5 and PM10 are integrated, multiple parameters are combined, and the integration degree is higher.

[0006] Further, the upper surface of the circuit board is integrated with a communication module, the input end of the communication module is electrically connected to the output end of the main control module, and the collected data is sent to the outside.

[0007] Further, the lower end of the upper surface of the circuit board is provided with an external port, the input end of the external port is electrically connected to an external power supply, and the output end of the external port is electrically connected to the input end of the wide voltage power supply module, so that the sensor is conveniently connected with the outside.

[0008] Further, the upper surface of the circuit board is provided with an indicator light, the input end of the indicator light is electrically connected to the output end of the main control module, and the working state is indicated.

[0009] Further, the chip of the communication module can adopt an RS485 chip, and the control data is transmitted.

[0010] Further, the temperature and humidity chip of the outdoor temperature and humidity pressure detection module can adopt an SHT30 chip, and the temperature and humidity in the outdoor air are detected.

[0011] Further, the air pressure chip of the outdoor temperature and humidity pressure detection module can adopt an MS560720BA air pressure chip, and the air pressure of the outdoor air is detected.

[0012] Compared with the prior art, the wide voltage power supply multi-in-one outdoor air particulate matter temperature and humidity pressure sensor has the following advantages:

[0013] 1. A plurality of sensitive components are adopted, a functional sensor with multiple elements is realized, and five parameters of air temperature, air humidity, atmospheric pressure, fine particulate matter PM2.5 and fine particulate matter PM10 are measured.

[0014] 2, wide voltage power supply design, can adapt to wide voltage 5-40V DC power supply.

[0015] 3, PCB board adopts the layout of the hollow design, the optimization of air inlet duct, air circulation can make the sensor fast response.

[0016] 4, a plurality of sensor chips, realize air temperature, air humidity, atmospheric pressure, PM2.5, PM10 integration, multi parameter integration, higher integration. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure diagram of the utility model;

[0018] Figure 2 is the circuit structure diagram of the external port of the utility model;

[0019] Figure 3 is the circuit structure diagram of the wide voltage power supply module of the utility model;

[0020] Figure 4 is the circuit structure diagram of the main control module of the utility model;

[0021] Figure 5 is the circuit structure diagram of the communication module of the utility model;

[0022] Figure 6 is the temperature and humidity sensing circuit structure diagram of the utility model;

[0023] Figure 7 is the air pressure sensing circuit structure diagram of the utility model;

[0024] Figure 8 is the circuit structure diagram of the particulate matter detection module of the utility model.

[0025] In the figure: 1 circuit board, 2 particulate matter detection module, 3 outdoor temperature and humidity air pressure detection module, 4 wide voltage power supply module, 5 hollow punching, 6 main control module, 7 communication module, 8 external port, 9 indicator light. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] Please refer to Figures 1-8This embodiment provides a technical solution: a wide voltage power supply multi-in-one outdoor air particulate matter temperature, humidity and barometric pressure sensor, including a circuit board 1, which provides support for the setting of the sensing components;

[0028] Circuit board 1: Its upper surface integrates a particulate matter detection module 2, an outdoor temperature, humidity and pressure detection module 3, a wide voltage power supply module 4, and a main control module 6. The outer edge of the upper surface of circuit board 1 has perforated holes 5, located on the upper and lower sides of the outdoor temperature, humidity and pressure detection module 3. The output terminal of the wide voltage power supply module 4 is electrically connected to the input terminal of the main control module 6. Both the particulate matter detection module 2 and the outdoor temperature, humidity and pressure detection module 3 are bidirectionally electrically connected to the main control module 6. Figure 8 As shown, U7 represents particulate matter detection module 2, which requires a 5V power supply. Pins 1 and 2 of U7 are power supply pins, pin 6 is a data output port connected to pin 12 of the main control chip, outputting a PWM signal, pin 9 of U7 is a serial communication port connected to pin 19 of the main control chip for data output, and pin 10 of U7 is an enable pin connected to pin 14 of the main control chip to control the operation or sleep mode of U7. During detection, the main control chip controls the fan inside particulate matter detection module 2 to rotate, allowing outdoor air to enter the sensor and flow through the perforated holes 5, establishing a good air passage. The temperature and humidity chip of the outdoor temperature, humidity, and air pressure detection module 3 can use the SHT30 chip, and the air pressure chip can use the MS560720BA air pressure chip. Figure 6 , 7 As shown, the main control chip acquires data from the temperature and humidity chip and the barometric pressure chip through ports P1.4 and P1.5. Using the IIC interface, a parallel circuit is used to acquire data from both chips simultaneously. Pin 2 of the SHT30 temperature and humidity chip is the address pin, connected to ground and set to address 0x44, used for acquiring the frame header required by the program. Pin 5 of the SHT30 is the power supply pin, with capacitor C6 connected in parallel to provide stable power and decoupling. The MS560720BA U6 chip is the barometric pressure chip; its pin 5 is the address pin, connected to ground and set to address 0xEE, used for acquiring the frame header required by the program. Pin 1 of the MS560720BA is the power supply pin, with capacitor C10 connected in parallel to provide stable power and decoupling. Figure 3 As shown, the power supply is provided to the power chip U1 through capacitors C1 and C2 for current regulation and filtering. The chip converts the voltage to 5V DC, which is then stabilized at 5V by inductor L1 and capacitor C4 before being output to chip U3. U3 converts this to 3.3V, which is then regulated by capacitor C5 before being output to the entire system. The acceptable voltage range for the power supply is 5-40V. Indicator light 9 is located on the upper surface of circuit board 1. The input terminal of indicator light 9 is electrically connected to the output terminal of the main control module 6. Figure 4As shown, the 3.3V power supply is filtered and decoupled by capacitors C7 and C8, and finally powers the domestic chip STC8G1K08. The chip serves as the device master chip, R10 and LED1 are connected to the chip pin No. 1, and LED1 serves as a status light indicator. R7 and R8 are IIC circuit pull-up resistors that provide the necessary current and enhance signal integrity. The upper surface of the circuit board 1 is integrated with a communication module 7. The input end of the communication module 7 is electrically connected to the output end of the master control module 6. The chip of the communication module 7 can use an RS485 chip, such as Figure 5 As shown, the master chip controls the RS485 chip GM3085E through the P3.0 and P3.1 ports to realize data output to external sensors. The RS485 chip sends air temperature, humidity, air pressure, fine particulate matter PM2.5, and fine particulate matter PM10 five parameter state data for external communication. The base of the transistor Q1 is connected to the P3.1 sending end of the master chip through the resistor R1. The collector of Q1 is connected to the 2 and 3 pins of U2, realizing automatic receiving and sending flow control of the RS485 signal. The lower end of the upper surface of the circuit board 1 is provided with an external port 8. The input end of the external port 8 is electrically connected to an external power supply. The output end of the external port 8 is electrically connected to the input end of the wide voltage power supply module 4, as shown in Figure 2 As shown, the sensor provides power through the external port CN1. The power is input from the No. 1 pin of CN1 and input into the system through D2 (diode anti-reverse connection). R3 is connected to the 2 and 3 pins of CN1 at both ends to output externally.

[0029] The working principle of the wide-voltage power supply all-in-one outdoor air particulate matter temperature and humidity and air pressure sensor is as follows: when the sensor is used outdoors, an external power supply is input through the No. 1 pin of the external port 8, and is input into the system through the anti-reverse connection of the D2 diode; the acceptable range of the power supply is 5-40V; the power supply is supplied to the power supply chip U1 after being stabilized and filtered by the capacitors C1 and C2; the power supply is changed to a 5V direct current power supply through U1, and then is output to the U3 chip after being stabilized by the inductor L1 and the capacitor C4; the U3 converts the current to 3.3V, and then outputs to the entire system through the voltage and current stabilization of C5, so as to realize wide-voltage power supply; the 3.3V power supply is finally supplied to the STC8GIK08 master control chip in the main control module 6 after being filtered and decoupled by the capacitors C7 and C8; the resistance R10 is connected in series between the indicator lamp 9 and the No. 1 pin of the master control chip; the indicator lamp 9 is used as a state lamp indicator; in the detection process, the fan in the particulate matter detection module 2 is controlled to rotate by the master control chip, so that the outdoor air enters the inside of the sensor and flows through the hollow punched hole 5, a good air passage is established, the master control chip collects the data of the temperature and humidity chip and the air pressure chip through the P1.4 and P1.5 ports, and the IIC interface is used; the data of the two chips are collected through the parallel circuit; the No. 13 pin of the master control chip is connected with the No. 6 pin of the particulate matter detection module 2, the PWM signal output by the particulate matter detection module 2 is collected, the No. 19 pin of the master control chip is connected with the No. 9 pin of the particulate matter detection module 2, the serial digital signal output by the particulate matter detection module 2 is collected, then the master control chip controls the RS485 chip to transmit the collected data to the outside through the P3.0 and P3.1 ports, and the measurement of the outdoor air temperature, air humidity, atmospheric pressure, PM2.5 and PM10 is realized.

[0030] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the utility model specification and drawing contents, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A wide voltage powered all-in-one outdoor air particulate matter temperature and humidity barometric pressure sensor, characterized by: The circuit board (1) is characterized in that: The upper surface of the circuit board (1) is integrated with a particulate matter detection module (2), an outdoor temperature and humidity and pressure detection module (3), a wide voltage power supply module (4) and a main control module (6), respectively.

2. The all-in-one outdoor air particulate matter temperature and humidity pressure sensor with wide voltage power supply according to claim 1, characterized in that: The upper surface of the circuit board (1) is integrated with a communication module (7), and the input end of the communication module (7) is electrically connected to the output end of the main control module (6).

3. The all-in-one outdoor air particulate matter temperature and humidity pressure sensor with wide voltage power supply according to claim 1, characterized in that: The lower end of the upper surface of the circuit board (1) is provided with an external port (8), the input end of the external port (8) is electrically connected to an external power supply, and the output end of the external port (8) is electrically connected to the input end of the wide voltage power supply module (4).

4. The all-in-one outdoor air particulate matter temperature and humidity pressure sensor with wide voltage power supply according to claim 1, characterized in that: The upper surface of the circuit board (1) is provided with an indicator light (9), and the input end of the indicator light (9) is electrically connected to the output end of the main control module (6).

5. The wide voltage powered all-in-one outdoor air particulate matter temperature and humidity barometric pressure sensor of claim 2, wherein: The chip of the communication module (7) can adopt an RS485 chip.

6. The wide voltage powered all-in-one outdoor air particulate matter temperature and humidity barometric pressure sensor of claim 1, wherein: The temperature and humidity chip of the outdoor temperature and humidity and pressure detection module (3) can adopt an SHT30 chip.

7. The all-in-one outdoor air particulate matter temperature and humidity barometric pressure sensor with wide voltage power supply according to claim 1, characterized in that: The pressure chip of the outdoor temperature and humidity and pressure detection module (3) can adopt an MS560720BA pressure chip.

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