Laser sensor and airborne particle counter with laser sensor

A technology of laser sensor and particle counter, which is applied in the direction of scientific instruments, individual particle analysis, particle and sedimentation analysis, etc., to achieve the effect of improving accuracy

Inactive Publication Date: 2012-01-25
SUZHOU INDAL PARK HJCLEAN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] As mentioned above, when the particle diameter in the air exceeds 10 μm, the laser sensor cannot accurately and comprehensively detect the dust particles in the air

Method used

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  • Laser sensor and airborne particle counter with laser sensor
  • Laser sensor and airborne particle counter with laser sensor
  • Laser sensor and airborne particle counter with laser sensor

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Embodiment Construction

[0024] The invention provides a laser sensor and a dust particle counter using the laser sensor to accurately detect large dust particles with a diameter exceeding 10 μm in the air.

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] see figure 1 , is a schematic structural diagram of a laser sensor provided by an embodiment of the present invention. A semiconductor laser 11 is included as a laser light source. A slit barrier 12 is arranged on the irradiation direction of the laser light source, so that t...

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Abstract

The invention discloses a laser sensor and an airborne particle counter with the laser sensor. The laser sensor which comprises a semiconductor laser which is used as a laser light source is characterized in that: a slit diaphragm which is arranged under the irradiation of the laser light source allows the laser light source to form a photosensitive area; a photoelectric receiver is arranged in the photosensitive area at a vertical direction; a suction nozzle and a venting nozzle which is symmetric with the suction nozzle are arranged in the photosensitive area at the vertical direction; and the suction nozzle comprises an internal sampling tube for conveying a sampling gas and an external protection tube which is arranged on the outboard of the internal sampling tube and is used for providing the protection gas. By adopting the airborne particle counter, large granular airborne particles with the diameter of over 10mum in air can be accurately detected.

Description

technical field [0001] The invention relates to a detection device for large dust particles, in particular to a laser sensor and a dust particle counter using the laser sensor. Background technique [0002] At present, the application of dust particle counters has been widely used in various fields such as pharmaceuticals, electronics, medical and health care, optics, and surface spraying. The dust particle counters can detect the number of large particles of dust in a certain environmental area. [0003] Among them, the laser sensor is an important component in the dust particle counter, which is used to detect the size and quantity of dust particles. The laser sensors in the prior art all detect particles with a diameter of 0.3-10 μm. When the particle diameter exceeds 10 μm, the following situations will exist: [0004] Due to the relatively large self-weight of the particles, it will cause the particles to settle in the optical cavity and cannot be detected; [0005] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/14
Inventor 曾世清
Owner SUZHOU INDAL PARK HJCLEAN TECH
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