Optical-fiber dust concentration measurement apparatus

Abstract

The invention relates to the technical field of dust concentration measurement, and particularly discloses an optical-fiber dust concentration measurement apparatus. The optical-fiber dust concentration measurement apparatus successively comprises a light source part, an input optical fiber, a measurement part, an output optical fiber, a signal conversion part and a data processing part. The measurement part comprises a beam splitter, a first measurement area consisting of a first transmitting end, a first attenuation area, a first receiving end and a first connecting rod, and a second measurement area consisting of a second transmitting end, a second attenuation area, a second receiving end and a second connecting rod. Laser is divided by the beam splitter into a first optical path and a second optical path and then enters the first measurement area and the second measurement area to be measured, and after the measurement, an optical signal is outputted by virtue of the output optical fiber to the signal conversion part to be converted into an electric signal, and the data processing part calculates a laser attenuation coefficient by virtue of the received electric signal. By utilizing the dual-optical-path measurement and differential operation method, a measurement error is eliminated, and the measurement precision is improved.

Description

technical field [0001] The invention relates to the field of dust concentration measurement, in particular to an optical fiber type dust concentration measurement device. Background technique [0002] The measurement methods of dust concentration mainly include optical analysis method and non-optical analysis method. Due to the slow response speed of detection equipment and complicated processing, non-optical analysis method is difficult to monitor the dust concentration in real time. The dust concentration measurement technology based on optical analysis has the characteristics of high detection sensitivity, strong selectivity, and fast response speed. It is suitable for on-site real-time monitoring, and the cost is low. It is an ideal method for dust concentration measurement in the future. [0003] Existing hand-held dust concentration measuring devices must require operators to measure on site, and in environments with high dust concentrations similar to coal mines, oper...

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Problems solved by technology

[0003] Existing hand-held dust concentration measurement devices must require operators to measure on the spot, and in environments with high dust concentrations similar to coal mines, operators must take dust-proof measures when measuring, otherwise it will damage the respiratory tract and affect health

The existing chemical reaction type dust concentration sensor needs to collect and process the air dust, which has a measurement delay difference and cannot perform real-time measurement; the electric dust concentration measurement device has poor safety. When the mine dust concentration is too high, a slight Sparks raise risk of mine explosion

For the fiber-optic dust concentration sensor, the optical fiber is used to transmit the optical signal over a long distance, and remote measurement can be realized. However, the measuring instrument is located in a high-dust area.

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