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Photoelectric conversion device

A technology of photoelectric conversion device and mounting base, which is applied in measurement device, material analysis by optical means, suspension and porous material analysis, etc., can solve problems such as potential safety hazards, achieve reasonable structure, good measurement stability and high sensitivity Effect

Active Publication Date: 2012-09-19
CHANGSHU MINE ELECTROMECHANICAL EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The dust concentration sensor disclosed in this patent can realize continuous work in a dusty environment, but because it uses a photomultiplier tube, it needs to provide a higher voltage when used, which constitutes a safety hazard in dusty workplaces

Method used

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0025] Such as figure 1 combine figure 2 As shown, the total mounting base 120 is a cuboid structure with a circular space in the middle as an illumination area. The laser light source 110 is installed in the left end mounting hole of the total mounting base 120 and fixed on the total mounting base through the mounting base 170. connect. A black object is installed on the right end of the total mounting base 120 to form a light trap. The upper end hole of the general mounting base 120 is connected with an air inlet connecting pipe 130, and the lower end hole is connected with an air outlet connecting pipe 140, and both the air inlet connecting...

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Abstract

The invention discloses a photoelectric conversion device. A photoelectric conversion unit comprises a semiconductor laser light source for emitting laser beams; an incident light channel, an illumination area, an emergent light channel and a light trap are arranged in turn in the advancing direction of the laser beams emitted by the laser light source; the laser beams pass through the illumination area, a spherical reflector and a semiconductor light detector are arranged in a direction vertical to a light path and are arranged on the two sides of the illumination area respectively, and the light detector is connected with an amplifying circuit; an air inlet connecting pipe and an air outlet connecting pipe are symmetrically distributed on the two sides of the illumination area, the air inlet connecting pipe is arranged at the upper end of the illumination area, the air outlet connecting pipe is arranged at the lower end of the illumination area, and the pipe diameter of the air inlet connecting pipe is smaller than that of the air outlet connecting pipe; and the air inlet connecting pipe is provided with a flat pipe hole. The photoelectric conversion device has a reasonable structure, high measurement stability and high sensitivity and accuracy, and is easy to maintain.

Description

technical field [0001] The invention relates to a photoelectric conversion device, in particular to a photoelectric conversion device for a dust concentration sensor. Background technique [0002] At present, there are mainly the following methods for measuring the dust concentration: one is to use a dust sampler, which uses the principle of filter membrane weighing method: a certain volume of dusty air is extracted, and the dust is captured on the filter membrane. The increased dust mass, and then use the formula to calculate the dust mass concentration in the unit volume of air. This method is not only inconvenient to operate, but also cannot be measured continuously. One is a direct-reading dust meter, which mainly uses indirect methods such as light scattering, β source absorption and other principles, and uses a sampler for calibration, which can instantly display the measured dust concentration value, but the working time is short and the number of measurements is lim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/06G01N21/01
Inventor 范人杰
Owner CHANGSHU MINE ELECTROMECHANICAL EQUIP
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