A dual channel in-car dust sensor

Abstract

A double channel dust sensor in vehicle relates to the technical field of automobile sensor, including base, upper cover, first air inlet pipe, first exhaust pipe, second air inlet pipe, second exhaust pipe, PCB board, fan, inner cover, light emitting tube, light receiving tube, first lens and second lens, the lower side of upper cover is equipped with base, both ends of base are equipped with first light path area and second light path area, the upper side of first light path area and second light path area is equipped with inner cover, fan and PCB board in turn, both in first light path area and second light path area are equipped with light emitting tube and light receiving tube, both ends of base are equipped with first air inlet pipe, first exhaust pipe, second air inlet pipe and second exhaust pipe respectively;The utility model discloses a double channel independent sampling structure, obtains dust concentration data in two space positions simultaneously, avoids the time sequence error caused by turn -to -turn sampling, improves the spatial comparative analysis ability and data timeliness of air quality monitoring, through common main control circuit and power supply system, reduces overall energy consumption and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive sensor technology, and in particular to a dual-channel in-vehicle dust sensor. Background Technology

[0002] During the use of a car, a large amount of dust and particulate matter is generated both inside and outside the vehicle. This dust and particulate matter are dispersed inside the car through the air circulation system. Existing dust sensors are generally single-channel structures. These sensors are mostly composed of an infrared light source, a photodetector, an airflow channel, and a signal processing circuit. Their basic working principle is as follows: the infrared light source emits infrared light of a certain wavelength, and the dust particles suspended in the air scatter the light. Some of the scattered light is received by the detector, and the sensor calculates the particulate matter concentration value by measuring the change in the intensity of the scattered light.

[0003] These types of sensors cannot monitor air quality at different spatial locations simultaneously, limiting the real-time assessment of environmental differences. While multi-point detection can be achieved by installing multiple sensors in parallel, problems such as large device deviations, poor synchronization, large system size, and high power consumption exist. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model discloses a dual-channel in-vehicle dust sensor. This utility model sets up a PCB board, a fan, an inner cover, a light-emitting tube, a light-receiving tube, a first lens, and a second lens between the base and the upper cover, and sets up a first air intake pipe, a first exhaust pipe, a second air intake pipe, and a second exhaust pipe at both ends of the base, so as to achieve the purpose of simultaneously acquiring dust concentration data in two spatial locations, thereby improving the spatial comparison and analysis capability and data timeliness of air quality monitoring.

[0005] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0006] A dual-channel in-vehicle dust sensor includes a base, a top cover, a first air intake pipe, a first exhaust pipe, a second air intake pipe, a second exhaust pipe, a PCB board, a fan, an inner cover, a light-emitting diode, a light-receiving diode, a first lens, and a second lens. The base is bolted to the bottom of the top cover. The base has a first optical path area and a second optical path area at both ends. An inner cover is located above both the first and second optical path areas. A fan is located above both inner covers, and a PCB board is located above the fans. A light-emitting diode and a light-receiving diode are located within both the first and second optical path areas. A first lens is mounted on the light-emitting diode, and a second lens is mounted on the light-receiving diode. One end of the base has a first air intake pipe and a first exhaust pipe, with the first air intake pipe communicating with the first optical path area and the first exhaust pipe located above the inner cover and communicating with the base. The other end of the base has a second air intake pipe and a second exhaust pipe, with the second air intake pipe communicating with the second optical path area and the second exhaust pipe located above the inner cover on the other side and communicating with the base.

[0007] The outer surface of the top cover is provided with a connector, which is electrically connected to the PCB board and to the wiring harness inside the vehicle.

[0008] The fan is electrically connected to the PCB board. The fan is equipped with a guide ring, the lower end of which is connected to the upper surface of the inner cover. The fan rotates within the guide ring.

[0009] The guide ring has an opening on its side, and the openings of the two guide rings are respectively connected to the first exhaust pipe and the second exhaust pipe.

[0010] Two fixed chambers are symmetrically arranged within the first optical path area. One fixed chamber within the first optical path area contains a light-emitting tube and a first lens, while the other fixed chamber within the first optical path area contains a light-receiving tube and a second lens.

[0011] Two fixed chambers are symmetrically arranged in the second optical path area. One fixed chamber in the second optical path area is equipped with a light-emitting tube and a first lens, and the other fixed chamber in the second optical path area is equipped with a light-receiving tube and a second lens.

[0012] Both the light-emitting diode and the light-receiving diode are electrically connected to the PCB board. The light emitted by the light-emitting diode passes through the first lens and is then transmitted to the light-receiving diode after passing through the second lens.

[0013] Both the first optical path region and the second optical path region have a mirror reflection layer on their inner walls.

[0014] The dual-channel in-vehicle dust sensor described in this utility model is highly practical and very convenient to use. Through the dual-channel independent sampling structure, dust concentration data can be acquired simultaneously at two spatial locations, avoiding the timing errors caused by alternating sampling, and improving the spatial comparison and analysis capabilities and data timeliness of air quality monitoring. By sharing the main control circuit and power supply system, the overall energy consumption and manufacturing cost are reduced. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a schematic diagram showing the positional relationship between the base and the PCB board of this utility model;

[0018] Figure 4 This is a schematic diagram showing the positional relationship between the base and the fan of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the base of this utility model;

[0020] In the diagram: 1. Base; 2. Top cover; 3. Connector; 4. First exhaust pipe; 5. Second exhaust pipe; 6. First air intake pipe; 7. Second air intake pipe; 8. PCB board; 9. Inner cover; 10. Air guide ring; 11. Fan; 12. First optical path area; 13. Second optical path area; 14. Fixing chamber; 15. First lens; 16. Light-emitting tube; 17. Second lens; 18. Light-receiving tube. Detailed Implementation

[0021] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0022] Combined with appendix Figures 1-5 A dual-channel in-vehicle dust sensor includes a base 1, a top cover 2, a first air intake pipe 4, a first exhaust pipe 6, a second air intake pipe 5, a second exhaust pipe 7, a PCB board 8, a fan 11, an inner cover 9, a light-emitting diode 16, a light-receiving diode 18, a first lens 15, and a second lens 17. The base 1, bolted to the bottom of the top cover 2, has a first optical path region 12 and a second optical path region 13 at both ends inside the base 1. An inner cover 9 is located above both the first and second optical path regions 12 and 13, and a fan 11 is located above each inner cover 9. A PCB board 8 is located above the fan 11. Both light-emitting tubes 16 and light-receiving tubes 18 are provided in the first optical path area 12 and the second optical path area 13. The light-emitting tube 16 is provided with a first lens 15 that cooperates with it, and the light-receiving tube 18 is provided with a second lens 17 that cooperates with it. One end of the base 1 is provided with a first air inlet pipe 6 and a first exhaust pipe 4. The first air inlet pipe 6 is connected to the first optical path area 12, and the first exhaust pipe 4 is located above the inner cover 9 and connected to the base 1. The other end of the base 1 is provided with a second air inlet pipe 7 and a second exhaust pipe 5. The second air inlet pipe 7 is connected to the second optical path area 13, and the second exhaust pipe 5 is located above the inner cover 9 on the other side and connected to the base 1.

[0023] The outer surface of the upper cover 2 is provided with a connector 3, which is electrically connected to the PCB board 8 and the vehicle wiring harness. The vehicle wiring harness supplies power to the PCB board 8, fan 11, light-emitting tube 16 and light-receiving tube 18 through the connector 3, thereby reducing overall energy consumption.

[0024] The fan 11 is electrically connected to the PCB board 8. The fan 11 is provided with a guide ring 10. The lower end of the guide ring 10 is connected to the upper end face of the inner cover 9. The fan 11 rotates inside the guide ring 10. The two fans 11 rotate simultaneously to draw external air into the first optical path area 12 and the second optical path area 13.

[0025] The guide ring 10 has an opening on its side, and the openings of the two guide rings 10 are respectively connected to the first exhaust pipe 4 and the second exhaust pipe 5. The guide ring 10 prevents the incoming air from drifting in the base 1 and avoids cross-contamination.

[0026] Two fixed chambers 14 are symmetrically arranged in the first optical path region 12. One fixed chamber 14 in the first optical path region 12 is equipped with a light-emitting tube 16 and a first lens 15, and the other fixed chamber 14 in the first optical path region 12 is equipped with a light-receiving tube 18 and a second lens 17.

[0027] Two fixed chambers 14 are symmetrically arranged in the second optical path region 13. One fixed chamber 14 in the second optical path region 13 is equipped with a light-emitting tube 16 and a first lens 15, and the other fixed chamber 14 in the second optical path region 13 is equipped with a light-receiving tube 18 and a second lens 17.

[0028] Both the light-emitting diode 16 and the light-receiving diode 18 are electrically connected to the PCB board 8. The light emitted by the light-emitting diode 16 passes through the first lens 15 and is then transmitted to the light-receiving diode 18 after passing through the second lens 17.

[0029] Both the first optical path region 12 and the second optical path region 13 have a mirror reflection layer on their inner walls. The light emitted by the light-emitting tube 16 in the first optical path region 12 is refracted by the mirror reflection layer in the first optical path region 12 to the light-receiving tube 18. The light emitted by the light-emitting tube 16 in the second optical path region 13 is refracted by the mirror reflection layer in the second optical path region 13 to the light-receiving tube 18. Dust will change the reflection of light, causing the light signal value received by the light-receiving tube 18 to change, thereby determining the concentration of dust in the vehicle.

[0030] The dual-channel in-vehicle dust sensor described in this embodiment connects connector 3 to the in-vehicle wiring harness during use. The in-vehicle wiring harness supplies power to the PCB board 8, fan 11, LED 16, and light-receiving tube 18 through connector 3, reducing overall energy consumption. The two fans 11 rotate simultaneously, drawing external air into the first optical path region 12 and the second optical path region 13. A guide ring 10 prevents the incoming air from dispersing within the base 1, avoiding cross-contamination. The light emitted by the LED 16 in the first optical path region 12 is refracted by a mirrored reflective layer within the first optical path region 12 to the light-receiving tube 18, and the light emitted by the LED 16 in the second optical path region 13 is refracted by a mirrored reflective layer within the second optical path region 13 to the light-receiving tube 18. Dust alters the reflection of light, causing a change in the light signal value received by the light-receiving tube 18, thereby determining the concentration of dust inside the vehicle. The dual-channel independent sampling structure allows for simultaneous acquisition of dust concentration data from two spatial locations, avoiding timing errors caused by alternating sampling and significantly improving the spatial comparative analysis capability and data timeliness of air quality monitoring.

[0031] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A dual-channel in-vehicle dust sensor, comprising a base (1), a top cover (2), a first air intake pipe (6), a first exhaust pipe (4), a second air intake pipe (7), a second exhaust pipe (5), a PCB board (8), a fan (11), an inner cover (9), a light-emitting tube (16), a light-receiving tube (18), a first lens (15), and a second lens (17), wherein the base (1) is bolted below the top cover (2), characterized in that: The base (1) has a first optical path area (12) and a second optical path area (13) at both ends. Both the first optical path area (12) and the second optical path area (13) have inner covers (9) above them. Both inner covers (9) have fans (11) above them. Both fans (11) have PCB boards (8) above them. Both the first optical path area (12) and the second optical path area (13) have light-emitting tubes (16) and light-receiving tubes (18). The light-emitting tube (16) has a first lens (15) that is matched with it. The light-receiving tube (18) has a first lens (15) that is matched with it. The base (1) is provided with a second lens (17) that is configured to cooperate with it. One end of the base (1) is provided with a first air inlet pipe (6) and a first exhaust pipe (4). The first air inlet pipe (6) is connected to the first optical path area (12). The first exhaust pipe (4) is located above the inner cover (9) and is connected to the base (1). The other end of the base (1) is provided with a second air inlet pipe (7) and a second exhaust pipe (5). The second air inlet pipe (7) is connected to the second optical path area (13). The second exhaust pipe (5) is located above the inner cover (9) on the other side and is connected to the base (1).

2. The dual-channel in-vehicle dust sensor according to claim 1, characterized in that: The outer surface of the top cover (2) is provided with a connector (3), which is electrically connected to the PCB board (8) and to the vehicle wiring harness.

3. The dual-channel in-vehicle dust sensor according to claim 1, characterized in that: The fan (11) is electrically connected to the PCB board (8). The fan (11) is provided with a guide ring (10). The lower end of the guide ring (10) is connected to the upper end face of the inner cover (9). The fan (11) rotates inside the guide ring (10).

4. The dual-channel in-vehicle dust sensor according to claim 3, characterized in that: The guide ring (10) has an opening on its side, and the openings of the two guide rings (10) are respectively connected to the first exhaust pipe (4) and the second exhaust pipe (5).

5. The dual-channel in-vehicle dust sensor according to claim 1, characterized in that: Two fixed chambers (14) are symmetrically arranged in the first optical path region (12). One fixed chamber (14) in the first optical path region (12) is equipped with a light-emitting tube (16) and a first lens (15). The other fixed chamber (14) in the first optical path region (12) is equipped with a light-receiving tube (18) and a second lens (17).

6. The dual-channel in-vehicle dust sensor according to claim 1, characterized in that: Two fixed chambers (14) are symmetrically arranged in the second optical path region (13). One fixed chamber (14) in the second optical path region (13) is equipped with a light-emitting tube (16) and a first lens (15). The other fixed chamber (14) in the second optical path region (13) is equipped with a light-receiving tube (18) and a second lens (17).

7. The dual-channel in-vehicle dust sensor according to claim 5, characterized in that: The light-emitting tube (16) and the light-receiving tube (18) are both electrically connected to the PCB board (8). The light emitted by the light-emitting tube (16) passes through the first lens (15) and is transmitted to the light-receiving tube (18) after passing through the second lens (17).

8. The dual-channel in-vehicle dust sensor according to claim 5, characterized in that: Both the first optical path region (12) and the second optical path region (13) have a mirror reflection layer on their inner walls.

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