Reflective photoelectric sensing equipment and method for checking whether object is taken away or not

Abstract

An embodiment of the invention discloses reflective photoelectric sensing equipment, which comprises a light source, a photoelectric sensor group, a baffle plate and a receiving circuit, wherein the light source is used for providing light to a to-be-detected object; the photoelectric sensor group comprises at least two photoelectric sensors, and the at least two photoelectric sensors have different photosensitive capacities and are used for receiving reflected light of the to-be-detected object and outputting at least two paths of detection signals; the baffle plate is located between the photoelectric sensor group and the light source, and is used for preventing light of the light source from irradiating the photoelectric sensor group; and the receiving circuit is connected with the photoelectric sensor group, and is used for receiving the at least two paths of detection signals, comparing each path of detection signal with a preset signal of the photoelectric sensor corresponding tothe detection signal, and judging that the to-be-detected object is taken away if a comparison result of the at least one path of detection signal and the preset signal meets a preset condition. Theinvention further provides a method for checking whether the object is taken away or not. The detection accuracy can be improved by adopting the reflective photoelectric sensing equipment and the method.

Description

technical field [0001] The invention relates to the technical field of photoelectric sensors, in particular to a reflective photoelectric sensing device and a method for checking whether an item is taken away. Background technique [0002] At the ticket exit of the bill module, the card slot of the ATM, the receipt list port of the ATM, and other human-computer interaction ports, some sensors are needed to detect whether the user has taken the ticket, document or card at the exit. [0003] Since the lobby-style equipment is installed in a small indoor compartment, it may be interfered by indoor fluorescent lights. The through-the-wall equipment may be exposed to direct sunlight from outside. Therefore, the device may be in an area with strong external light intensity. If the ambient light is strong, it may cause the phototransistor of the sensor to be saturated, resulting in failure to work normally. Contents of the invention [0004] Based on this, it is necessary to ad...

AI Technical Summary

Problems solved by technology

[0003]Since the lobby-style equipment is installed in a small indoor compartment, it may be interfered by indoor fluorescent lights

And through-the-wall equipment may be exposed to direct sunlight

Therefore, the device may be in a field with strong external light intensity. If the ambient light is strong, it may cause the phototransistor of the sensor to be saturated, resulting in failure to work normally.

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