Accurate counting and detection method of belt conveying bagged objects

Abstract

The invention discloses an accurate counting and detecting method for belt transmission of packed objects. In the upper part of both side frames of a belt conveyor, two pairs of opposite photoelectric switches are installed according to a set distance and situated in the opposite positions, and the photoelectric switches are connected with a counting control unit. The counting and detecting method comprises the following steps: 1) in each counting operation, the two pairs of photoelectric switches simultaneously detecting the first three pieces of single objects passing through a detection area, determining the reference transmission time value T reference, and automatically storing in the counting control unit; 2) detecting the running time length T test of the conveyed object passing through the change of the level of one pair of the photoelectric switches; and 3) obtaining number of objects conveyed and counting cumulatively according to n = T test / T reference. The accurate counting and detecting method has the advantages that the number of bags of the conveyed objects can be effectively detected, undetected condition of the laterally placed objects and the stacked bags is avoided, and accurate counting is achieved.

Description

technical field [0001] The invention relates to a method for accurately counting and detecting bagged objects conveyed by a belt. Background technique [0002] Belt conveyors are widely used in modern production operations, especially in industries characterized by bag packaging such as chemical fertilizers, salt industry, feed, grain, cement, sugar, etc. Belt conveyors are the main components in their production and circulation. transmission device. In the operation of using a belt conveyor to transport fixed and regular-shaped objects, the counting and detection method used is simple and accurate. However, in the transmission of non-fixed-shaped bagged objects, the requirements for the counting and detection method are relatively high. Therefore , the counting detection method is particularly important to ensure the counting accuracy when the conveyor transports the bagged objects. [0003] Usually, the transmission operation of some bagged objects is carried out outdoor...

AI Technical Summary

Problems solved by technology

Due to the limitations of this detection method, if the bagged objects are placed horizontally or placed on the conveyor belt at a large angle to the transmission direction, the effective detection length L may be smaller than the distance D between the photoelectric switches 1A and 1B, and the transmission The object cannot cover the photoelectric switch 1A and 1B at the same time, so that the transmission object cannot be effectively detected and counted

like figure 1 The transport objects placed in the stacked bags shown in the above cannot be effectively identified. figure 1 Among them, the bagged object 4B is placed on the bagged object 4A in the form of stacked bags, the effective detection length is F, and the value of F is smaller than the distance D between the detection points, that is, the transmission object 4B cannot block the photoelectric switches 1A and 1B at the same time , thus causing missed detection and reducing the accuracy of counting

[0008] The above three counting detection methods cannot fully meet the accurate counting requirements of bagged items transported by belt conveyors, and there are problems that are not suitable for popularization and application.

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