Trigger detection method, device and system

Abstract

The embodiment of the invention provides a trigger detection method. The method comprises the following steps: identifying an identifier on a holding surface of an object holding table; and under thecondition that the identifier on the containing surface is not recognized, triggering detection equipment to detect the object on the object containing table. According to the logistics detection method provided by the embodiment of the invention, the identifier is arranged on the containing surface of the object containing table in advance, when the object is not contained on the containing table, the identifier can be identified, and when the object is contained on the containing table, the identifier is covered, so that if the identifier arranged on the object containing table is not identified, it is indicated that the object is placed on the object placing table, and under the condition, the detection equipment is triggered to detect the object on the object placing table. Therefore,even if the height of the object is relatively low, the detection equipment can be triggered to detect the object, so that the occurrence of missing detection is reduced.

Description

technical field [0001] The invention relates to the technical field of logistics, in particular to a trigger detection method, device and system. Background technique [0002] The logistics sorting line is usually equipped with detection equipment, through which the volume and weight of objects can be detected, or a series of logistics information such as barcodes and characters on the surface of objects can be detected. [0003] In the prior art, a photoelectric sensor is usually used as a trigger. When an object passes by the photoelectric sensor, the photoelectric sensor will detect the change of the optical signal due to the occlusion of the object, thereby generating an electrical signal, which is used to trigger the detection device to detect the object. to test. [0004] Generally, for an optical signal, if the change of the optical signal can be detected by the photoelectric sensor, the cross-sectional area of ​​the optical signal needs to change greatly. In other w...

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Problems solved by technology

[0004] Generally, for an optical signal, if the change of the optical signal can be detected by the photoelectric sensor, the cross-sectional area of ​​the optical signal needs to change greatly. In other words, in the above scheme, the object needs to have a larger The cross-sectional area can make the cross-sectional area of ​​the light signal blocked by the object large enough, so that the photoelectric sensor can detect the change of the light signal, thereby triggering the detection device to detect the object, and if the cross-sectional area of ​​the object is relatively small , the ability to block the light signal is relatively weak, the photoelectric sensor will not be able to detect the change of the light signal, and it will not be able to trigger the detection device to detect the object

It can be seen that the above scheme will lead to more missed detections

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