Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-flow dust particle counting sensor with novel photosensitive area structure

A dust particle counting and photosensitive area technology, applied in measurement devices, scientific instruments, individual particle analysis, etc., can solve the problems of fixed and unadjustable gas path position, impaired counting efficiency, and affected signal-to-noise ratio, etc., to reduce the probability of , reduce airflow resistance, reduce the effect of diffusion

Inactive Publication Date: 2012-07-11
NANJING UNIV OF SCI & TECH
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the prior art are: the gas path system uses two inlet nozzles and one gas outlet nozzle, the structure is relatively complicated, and the position of the gas path is fixed and cannot be adjusted; two spherical reflectors are used to enhance the scattered light signal of the particles and at the same time The stray light signal is also enhanced, which affects the improvement of the signal-to-noise ratio; a corresponding photoelectric receiving device is installed behind a small hole on a spherical mirror to receive the scattered signal, which is easy to miss counting, and the counting efficiency is damaged, which affects the signal-to-noise ratio improvement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-flow dust particle counting sensor with novel photosensitive area structure
  • High-flow dust particle counting sensor with novel photosensitive area structure
  • High-flow dust particle counting sensor with novel photosensitive area structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be described in further detail and complete below in conjunction with the accompanying drawings.

[0018] see figure 1 , figure 2 . figure 1 and figure 2 It is a structural schematic diagram of a large-flow dust particle counting sensor with a novel photosensitive area structure disclosed by the present invention. It can be seen that the present invention is a right-angle scattering optical system, including an illumination system, a scattered light collection system, and an air path system.

[0019] The lighting system consists of a semiconductor laser 1, an aspheric mirror 2, a first entrance aperture 3, a second entrance aperture 4, an exit aperture 7, and an optical trap 8, in which the first entrance aperture 3 and the second entrance aperture 4 are placed In front of the photosensitive area 5 , an exit diaphragm 7 is placed behind the photosensitive area 5 . Light source 1 adopts a high-power semiconductor laser light source great...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-flow dust particle counting sensor with a novel photosensitive area structure. An aspherical mirror, an incident diaphragm, an emergent diaphragm and a light trap are arranged in sequence in the advancing direction of light beams emitted from a high-power semiconductor laser source; a spherical reflector, a field diaphragm and a photoelectric detector are arranged in the direction vertical to a light path; the photosensitive area and the photosensitive surface of the photoelectric detector are respectively positioned at two sides of the sphere center of the spherical reflector and satisfy the geometric object image relationship; a gas circuit system consists of a sampling nozzle and an outlet nozzle; the caliber of the sampling nozzle is smaller than that of the outlet nozzle; and the sampling nozzle and the outlet nozzle are arranged unsymmetrically with respect to the photosensitive area. The high-flow dust particle counting sensor has the advantages of simple structure, small volume, high counting efficiency and high particle diameter resolution ratio and can realize correct and efficient detection on the samples of high-flow dust particles not lower than 50L / min.

Description

technical field [0001] The invention relates to a cleanliness detection device, in particular to a high-flow, high-signal-to-noise ratio, high-resolution, miniaturized high-flow semiconductor dust particle counting sensor with a novel photosensitive region structure. Background technique [0002] Dust particle counting sensor is the main measurement system used to measure particle size distribution by light scattering counting method, and it is widely used in the cleanliness detection of electronics, materials, pharmaceuticals, laboratories and other departments. Optical sensors are at the heart of the measurement system. [0003] In the technical solution adopted by the advanced laser dust particle counting sensor, the flow rate has reached 50L / min. For example, Suzhou Hongji Clean Technology Co., Ltd. applied for a utility model patent on July 12, 2010, "A Large Flow Dust Particle Counter Photoelectric sensor" (patent number CN201780264U). It includes a cavity, and the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/14
Inventor 卞保民印爱丽王春勇
Owner NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products