Space multipoint instantaneous light intensity signal acquisition method based on Darlington type phototransistors

Abstract

The invention relates to a space multipoint instantaneous light intensity signal acquisition method based on Darlington type phototransistors, which adopts a digital signal processor (DSP) chip to control an electronic switch so as to realize the control for a working power supply of the phototransistors in all light intensity data acquisition units, so that the phototransistors in all the light intensity data acquisition units can be instantaneously started in a way of an electronic shutter, and space multipoint light intensity signals can be acquired; meanwhile, output ends of all the phototransistors are connected with a peak holding circuit, so that the acquired space multipoint light intensity signals are converted into voltage signals, and then are locked and stored in the peak holding circuit. The space multipoint instantaneous light intensity signal acquisition method based on the Darlington type phototransistors has the beneficial effects that in the optical flow field test, a plurality of light intensity data acquisition units are fixedly arranged at a plurality of points of the space, and the light intensity signals are needed to be acquired in the space, so that space multipoint optical radiation signals can be acquired and stored in real time; and three-dimensional flow field distribution can be reconstructed by free space ray rearrangement inverse algorithm, so that the problems of test accuracy and real-time performance of the optical flow field can be solved.

Description

technical field [0001] The invention relates to a method for collecting instantaneous light intensity signals of multiple points in space, in particular to a method for collecting instantaneous light intensity signals of multiple points in space based on a Darlington phototransistor. Background technique [0002] At present, in the optical flow field test, the real-time collection of optical radiation information of multiple points in space is a relatively difficult problem to solve. Using digital camera electronic shutter plus exposure technology, the instantaneous light intensity signals in several directions of the flow field to be measured can be obtained in the charge coupled device image sensor CCD (Charge Coupled Device) of the digital camera. However, in the collection of discrete spatial multi-point optical radiation information, the use of traditional shutter technology and a large number of charge-coupled device image sensors CCD not only increases the cost and c...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for acquiring spatial multi-point instantaneous light intensity signals based on Darlington-type phototransistors, to solve the problems in the acquisition of multi-point real-time data in existing flow field tests, and to combine free space tomography The inversion algorithm can obtain the three-dimensional physical parameter distribution of the object to be measured

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