Device, array and system for measuring flame propagation position and speed in large space

Abstract

The invention relates to a device, array and system for measuring the flame propagation position and speed in a large space. The device comprises a photodiode (1) and a sleeve (2), the photodiode (1)is located at the rear end of the sleeve (2), a light hole (3) is formed in the front end of the sleeve (2), a light path channel formed by the sleeve (2) is a photosensitive area reaching the photodiode (1) from the light hole (3) through the interior of the sleeve (2), and the area of the light hole (3) is 1-5 times that of the photosensitive area. The array comprises a plurality of the deviceswhich are distributed on the same horizontal plane in the circumferential direction, the system comprises a plurality of the arrays, and the arrays are sequentially arranged in the vertical direction.Compared with the prior art, the invention has the advantages that the balance between the measurement accuracy and sensitivity of a photodiode is realized, and the performance is improved.

Description

technical field [0001] The invention relates to the technical field of flame measurement, in particular to a device, array and system for measuring flame propagation position and velocity in a large space. Background technique [0002] In the observation of many combustion-related phenomena, the monitoring indicators that are very important to control the scale of combustion to prevent its disaster consequences include: the location of the flame and the speed of flame propagation. For example, when a serious accident occurs in a nuclear power plant, hydrogen will leak into the containment building of the power plant. Since hydrogen combustion will show different flame propagation speeds under different conditions, hydrogen combustion at low concentrations will only produce flames that propagate at subsonic speeds. The combustion (i.e. explosion) of high-concentration hydrogen will produce a flame propagating at supersonic speed, which will seriously threaten the safety of th...

AI Technical Summary

Problems solved by technology

In the three-dimensional structure of the large space, due to the existence of the isotropic photosensitive angle, the flames transmitted from different directions will increase the measurement error of the photodiode set in the above scheme, so that it is impossible to judge the specific arrival position of the flame, so It is necessary to find a flame propagation position and speed measurement solution that can improve the measurement accuracy. At the same time, while improving the measurement accuracy, it is necessary to avoid the reduction of the sensitivity of the photodiode, to achieve a balance between measurement accuracy and sensitivity, and to achieve the best measurement results.

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