A photoelectric reflective sensor array

Abstract

The invention discloses a photoelectric reflective sensor array comprising multiple photoelectric reflective sensors which are arranged at different positions and used for transmitting detection lightto a detection object and receiving the reflected light of the detection object and performing demodulated resonance on the reflected light so as to obtain demodulated resonance pulses; and a centralized controller which is used for determining the maximum amplitude of each received demodulated resonance pulse when the target condition is triggered, determining the intensity of the generated transmitting light intensity control signal according to the comparison result of the maximum amplitude and the first amplitude threshold and the second amplitude threshold and transmitting the transmitting light intensity control signal to each photoelectric reflective sensor so as to control the transmitting intensity of the detection light of each photoelectric reflective sensor. With application of the technical scheme, control of the detection light transmitting intensity is performed on each photoelectric reflective sensor so that the accuracy of each photoelectric reflective sensor can be enhanced and unified adjustment of all the photoelectric reflective sensors is performed and thus the adjustment cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of safety monitoring, in particular to a photoelectric reflective sensor array. Background technique [0002] A large number of electric vehicles in rail transit use pantographs to obtain power from the overhead dedicated power grid. When the vehicles are running, it is necessary to detect the range of motion of the grid and the detection of the pull-out value. The pull-out value refers to the pantograph The distance from the center of the track when contacting the grid at the anchor point. Non-contact sensors can meet the detection requirements because they can avoid direct contact. When placing them, they are usually placed densely next to the track, or a few sensors close to the detection object are installed in some key monitoring points. [0003] In operation, these sensors send light signals to the detection object and recognize the reflected light of the detection object. The emission intensity of t...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the complex on-site conditions, there will still be situations where the emission intensity of the sensor is not suitable. Specifically, when the emission intensity is too high, it will recognize disturbances farther away, such as subway hangings, reflections on the top of tunnels, etc. The reflected light of the interfering object, correspondingly, the emission intensity of the light signal of the sensor is low, and the detection object cannot be detected, which will affect the accuracy of the sensor's identification

In addition, the distance between the detection object and the sensor will also change continuously. For example, when the carbon brush of the pantograph wears out, the distance between each sensor and the power grid will change synchronously, which will also affect the accuracy of sensor recognition.

In addition, the number of sensors is large, and individual adjustment will make the volume and cost requirements of each sensor higher, so a unified adjustment is required

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