Particle counting sensor

A particle counting and sensor technology, used in instruments, scientific instruments, individual particle analysis, etc., can solve the problem of scattered light not being collected, affecting the accurate counting of particles, etc., to achieve high accuracy, improve accuracy, and reduce noise.

Pending Publication Date: 2022-06-28
SUZHOU SUXIN ENVIRONMENT SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, part of the scattered light cannot be collected, and due to the divergence angle of the laser, even after the beam is shaped, there will inevitably be stray light that affects the accurate counting and resolution of partic

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] like figure 1 and figure 2 As shown, a particle counting sensor of the present application includes a light source 1 that emits a light beam 21, which is used to drive an air path assembly for circulating the airflow to be measured, and the beam 21 intersects with the airflow to form a light working area 5; the particle counting sensor also includes a photodetector 6. , a scattered light collection assembly; surrounding the l...

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Abstract

The invention provides a particle counting sensor which comprises a light source for emitting light beams, a gas circuit assembly for circulation of to-be-detected gas flow, a photoelectric detector and a scattered light collecting assembly, wherein the light beams and the gas flow are crossed to form a light working area; the scattered light collecting assembly surrounds the light beam and comprises a first scattered light collecting structure and a second scattered light collecting structure which are arranged on the two opposite sides of the light working area respectively; the second scattered light collecting structure, the light working area, the first scattered light collecting structure and the photoelectric detector are arranged in sequence; a light reflecting surface is arranged in the first scattered light collecting structure, and a first reflecting cavity is defined by the light reflecting surface; the first scattered light collection structure is provided with a first light inlet and a first light outlet which are used for communicating the first reflection cavity with the outside, the first light inlet faces the light working area, and the first light outlet is combined with the photoelectric detector; the second scattered light collecting structure is provided with a third reflecting surface facing the light working area, and light of at least a part of area of the third reflecting surface is reflected into the first reflecting cavity.

Description

technical field [0001] The present invention relates to the technical field of particle counters, and more precisely relates to a particle counting sensor. Background technique [0002] The particle counting sensor is generally composed of a light source, an optical module, a gas path module, a photodetector, etc. The light beam emitted by the light source forms a uniform light field after passing through the optical module, and the gas path module conveys the airflow to be detected through the light field to form a uniform light field. In the light working area, the particles in the air flow emit scattered light after being irradiated. The scattered light is received by the photodetector arranged on one side of the light working area and converted into photocurrent. The photocurrent is converted into a voltage pulse signal through the amplification processing circuit. Different voltage pulse signals can distinguish the size of particle size. The more scattered light the ph...

Claims

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Application Information

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IPC IPC(8): G01N15/14
CPCG01N15/1434G01N2015/1486
Inventor 王少永惠旅锋
Owner SUZHOU SUXIN ENVIRONMENT SCI & TECH CO LTD
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