Vehicle-mounted laser PM2.5 sensor

A vehicle-mounted laser and sensor technology, used in scientific instruments, measuring devices, suspension and porous material analysis, etc., can solve the problems of inability to function as an induced draft fan, low detection accuracy, and unstable airflow, and achieve the measurement results. Accurate and reliable, accurate and reliable data, to ensure the effect of normal work

Pending Publication Date: 2018-03-06
武汉市普瑞思高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing PM2.5 sensors are mainly used in civilian purifiers, and they are all used in a static state. If the PM2.5 sensor is placed on the car, there will be the following problems: 1. The suction of the built-in fan in the car is too small, and the external airflow It is difficult to pass through the detection area of ​​the sensor stably and evenly, so that the detection of the sensor is easily affected by the external wind speed, resulting in large errors in the detection results, and the addition of external pipes cannot play the role of the induced draft fan; 2. There is no suitable for the outside of the car The fixed installation hole of the sensor is not convenient for the fixed installation of the sensor, and it is very inconvenient to use; 3. There is no air induction interface and exhaust interface outside the sensor, which greatly restricts the installation position of the sensor; 4. The air inlet on the existing sensor Poor sealing of air outlet and air outlet, and poor anti-interference performance make the sensor extremely vulnerable to the influence of external wind speed, resulting in inaccurate, abnormal or even invalid measurement results of the sensor
[0003] Due to the problems of difficult installation, unstable air flow, poor anti-interference ability, and poor sealing performance of the existing laser dust sensor placed on the vehicle, the laser dust sensor for the vehicle has poor practicability and low detection accuracy, causing great inconvenience to users. , which severely restricts the further promotion and application of laser dust detection instruments in the vehicle field, so it is urgent to provide a vehicle-mounted laser PM2.5 sensor that is easy to install, has stable airflow, strong anti-interference ability, good sealing, and high detection accuracy. Laser dust sensor is suitable for dust detection in various environments on the vehicle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like Figure 1-5 As shown, a vehicle-mounted laser PM2.5 sensor includes a housing 1, and the housing 1 is provided with an air inlet 2 and an air outlet 3, and the air inlet 2 and the air outlet 3 are respectively located opposite to the housing 1. On the two side walls, an induced draft fan 4 is provided at the air outlet 3, a circuit board 5 is provided inside the housing 1, a connector terminal 7 is provided above the circuit board 5, and a laser module fixing seat is provided below the circuit board 5. The laser module fixing seat is provided with an air duct inlet, an air duct outlet, a photosensitive area, and a photodiode stop; The connection is an open square box structure 92, and the center of the opposite side of the opening of the square box structure 92 is connected with an air induction pipe joint 91; The connection between 10 and the air outlet 3 is a disc structure 102, the disc structure 102 and the air outlet 3 are adapted to the air guide port of the...

Embodiment 2

[0034] This embodiment is a further optimization of Embodiment 1. The edge of the air outlet 3 is provided with a limiting convex ring 18, and the bottom edge of the exhaust port 10 is a circular ring. match the diameter. When in use, the air exhaust interface 10 is directly buckled on the limiting convex ring 18 to prevent the air exhaust interface 10 from moving relative to the air outlet 3 .

[0035] As a preferred implementation of this embodiment, the air inlet 2 is provided with a square protrusion 19 , and the size of the square box structure 92 matches the size of the square protrusion 19 . When in use, the square box structure 92 is fastened on the square protrusion 19 to prevent the relative movement of the air introduction interface 9 .

[0036] As a preferred implementation of this embodiment, a shielding cover 11 is arranged below the circuit board 5, and the laser module fixing seat is arranged inside the shielding cover 11 for shielding the electromagnetic inte...

Embodiment 3

[0042] The difference between this embodiment and the above embodiments is that: the diameter of the disc structure 102, the opening side length of the square box structure 92, and the aperture ratio of the exhaust pipe joint 101 are 7:5:2.

[0043] The inventor also carried out the simulated vehicle-mounted dust concentration detection test as in Example 1 by using the sensor in Example 1, and recorded the comparison test results between the PM2.5 value detected by each group of sensors and the standard value under different external disturbance conditions. The wind speed impact test results are as follows:

[0044]

[0045] Through the comparison of the detection results of each sensor in the above-mentioned wind speed impact test, it is found that the error between the PM2.5 value detected by each group of sensors and the standard value is ±8.0μg / m 3 within range. It shows that the detection result of the sensor in the embodiment of the present invention is not much dif...

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PUM

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Abstract

The invention discloses a vehicle-mounted laser PM2.5 sensor. The vehicle-mounted laser PM2.5 sensor comprises a shell, an air inlet and an air outlet are formed in the shell and are respectively located on the opposite two side walls of the shell, an air induction fan is arranged in the air outlet, an air induction interface is arranged in the air inlet, an air induction pipe connector is arranged on the air induction interface, an air exhaust interface is arranged in the air outlet, and an air exhaust pipe connector is arranged on the air exhaust interface. The air induction interface, the air exhaust interface and the internally arranged air induction fan are arranged, so that the air in or outside a vehicle is introduced into the inner part of the sensor, the concentration of dust in the air is then detected through laser, then the air is exhausted into or outside the vehicle through the fan, the air exhaust interface and an externally arranged air exhaust pipeline, air induction equipment is not additionally added, an external connection pipeline is adopted, and the vehicle-mounted laser PM2.5 sensor is not limited by the installation position, is good in airtightness, is notaffected by external air speed, and is strong in anti-jamming capability and high in detection accuracy, and the detection result is reliable.

Description

technical field [0001] The invention relates to the technical field of laser dust sensors, in particular to a vehicle-mounted laser PM2.5 sensor. Background technique [0002] With the continuous deterioration of the environment, the detection of dust concentration has become increasingly necessary in various industries and even people's lives, and the demand will become larger and larger. As the core component of laser dust detection instruments, the performance of laser dust sensors is crucial to The quality of the testing instrument has a decisive influence. Existing PM2.5 sensors are mainly used in civilian purifiers, and they are all used in a static state. If the PM2.5 sensor is placed on the car, there will be the following problems: 1. The suction of the built-in fan in the car is too small, and the external airflow It is difficult to pass through the detection area of ​​the sensor stably and evenly, so that the detection of the sensor is easily affected by the exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
CPCG01N15/06G01N2015/0693
Inventor 袁俊俊陈行
Owner 武汉市普瑞思高科技有限公司
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