Incident light lens for counting oil particles

Abstract

The invention belongs to an optical detection technology and relates to an incident light lens for counting oil particles. The incident light lens is a plane mirror with the thickness being 1-2mm; chromium is plated on one plane of the incident light lens and has a thickness being 0.1mm; a rectangular window is engraved in the central position of the chromium-plated side; the length of the rectangular window is 0.4-1mm, and the width of the rectangular window is 0.1-0.3mm. According to the incident light lens provided by the invention, the power requirement on a photodiode can be obviously lowered, and a particle resolution ratio of an oil particle counter can be effectively increased. The oil particles in the oil are counted by adopting an optical sampling mode according to the characteristic that the particle distribution in the oil particle counter is uniform, and aims of reducing the output light intensity and increasing the resolution ratio are achieved.

Description

technical field [0001] The invention belongs to optical detection technology, and relates to an incident light lens used for an oil particle counter. Background technique [0002] The core equipment of online detection of oil pollution is the oil particle counter. The basic principle of the oil particle counter is as follows: figure 1 As shown, the light emitting diode 1 emits a parallel light beam that passes through the incident light lens 10 , the particle detection area 6 in the oil pool 3 and the outgoing light lens 7 to irradiate on the photodiode 8 to form a projected area. When the oil passes through the particle detection area 6 along the direction 5, because the particles 4 in the liquid flow block part of the light in the particle detection area 6, the light intensity received by the photodiode 8 attenuates, and the degree of light intensity change reflects the The value of the degree of pollution. Wherein, the incident light lens 10 and the outgoing light lens...

AI Technical Summary

Problems solved by technology

Since all the light emitted by the light emitting diode 1 has to pass through the particle detection area 6, the light intensity that the photodiode 8 needs to receive is very large, which needs to be matched with a relatively high-power photodiode 8 and its relatively high-power drive circuit. The proportion of particles relative to the particle detection area 6 is small. When the particles pass through the particle detection area 6, the shadowing of the detection area forms a relatively small projected area, resulting in very little disturbance caused by the received light intensity of the photodiode 8, resulting in oil Liquid Particle Counters Drop Particle Resolution

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