Method and device for accurately focusing light by diffuse reflection sensor

Abstract

The invention provides a method for accurately focusing light by a diffuse reflection sensor. A light beam emitted by the sensor is emitted out of an automatic ticket checking device in a direct lightbeam form, so that the detection precision is ensured; and a larger opening is not required to be formed, so that the convenience of manufacturing is guaranteed and the attractiveness of the device is guaranteed. A light focusing device is arranged between a light-emitting hole and a transparent window of the diffuse reflection sensor, so that light rays emitted by the diffuse reflection sensor after passing through the light focusing device are straight parallel light beams; and the straight parallel light beams are arranged towards a to-be-detected object.

Description

technical field [0001] The invention relates to the technical field of height detection, in particular to a method for accurately condensing light by a diffuse reflection sensor, and also provides a device for accurately condensing light by a diffuse reflection sensor. Background technique [0002] The automatic ticket checking equipment detects whether there is a super high object to be detected through the automatic ticket checking channel through the diffuse reflection sensor. The light emitted by the diffuse reflection sensor goes through the window to the object to be detected. When the height of the object to be detected exceeds the set detection height, the beam It will be reflected, so that the diffuse reflection sensor receives the reflected light and sends out a signal. When the height of the object to be detected does not exceed the set detection height, the diffuse reflection sensor will not receive the reflected light, and will not send a signal or send out and e...

AI Technical Summary

Problems solved by technology

Since children are generally well-developed nowadays, when the object to be detected is a child, the original height of the toll-free pass is no longer suitable for the demand, so some operating companies increase the height of the toll-free child, which makes the installation of the diffuse reflection sensor and the ticket inspection The included angle of the device casing becomes smaller, which in turn increases the size of the opening of the device, while the light emitted by the existing diffuse reflection sensor is divergent, and the beam signal at the edge is relatively weak after being refracted and scattered through the window, and thus Cause detection inaccuracy

Images