Vehicle-mounted particle concentration detector

Abstract

The invention discloses a vehicle-mounted particle concentration detector which comprises a shell, a laser dust concentration sensor, a sampling pump and a sampling distribution valve, wherein the sampling distribution valve is arranged outside the shell and comprises a valve body and a valve core; a low-concentration sampling port, a high-concentration sampling port and a guide outlet are formed in the valve body; the low-concentration sampling port, the high-concentration sampling port and the guide outlet are communicated with an inner cavity of the valve body; a low-concentration channel and a high-concentration channel are formed in the valve core; the valve core is driven to slide by a valve core power device, so that the low-concentration sampling port and the guide outlet are butted and communicated with each other or the high-concentration sampling port and the guide outlet are butted and communicated with each other; a suction port of the sampling pump is butted and communicated with an air outlet of the laser dust concentration sensor through a communicating cavity; an outlet of the sampling pump is communicated with the exterior of the shell. The detector can detect the concentration of particles in a vehicle in real time and also can detect the concentration of particles outside the vehicle in real time, so that the detection result is comprehensive and accurate.

Description

technical field [0001] The invention relates to a detector, in particular to a vehicle-mounted particle concentration detector. Background technique [0002] The particle concentration detector generally uses a laser dust concentration sensor to quickly detect the dust concentration online. However, the current vehicle-mounted particle concentration detector has the following defects: 1. The current concentration detector generally only detects the particle concentration in the same environment, for example, only detects the particle concentration inside the car, or the particle concentration outside the car, and the detection results cannot be compared The difference between the current environment inside and outside the car cannot be found out based on the test results; 2. Since the detector sucks the air with particulate matter into the detector for detection, the usage time of the sampling pump of the detector Long, particles damage the internal structure; 3. During the...

AI Technical Summary

Problems solved by technology

However, the current vehicle-mounted particle concentration detector has the following defects: 1. The current concentration detector generally only detects the particle concentration in the same environment, for example, only detects the particle concentration inside the car, or the particle concentration outside the car, and the detection results cannot be compared Obtaining the difference between the environment inside and outside the current car, it is impossible to find out the problem of the concentration change according to the test results; 2. Since the detector sucks the air with particulate matter into the detector for detection, the usage time of the sampling pump of the detector Long, particles damage the internal structure; 3. During the use of the spherical reflector of the laser dust concentration sensor of the current detector, particles are easily stuck to the spherical surface of the reflector, and this phenomenon will affect the light radiation effect of the spherical reflector Therefore, regular disassembly and cleaning are required, and the current spherical reflector is installed on the laser dust concentration sensor, which is located inside the detector. Complicated, cumbersome disassembly, too many disassembly parts will easily affect the assembly accuracy

Images