Testing method of online weighing equipment for belt conveyor based on fringe projection

Abstract

The invention belongs to the technical field of continuous metering of bulk materials and particularly discloses a belt-conveyer online weighing apparatus based on fringe projection and a test methodthereof. According to the specific technical scheme, the belt-conveyer online weighing apparatus based on fringe projection comprises a mechanical support system, a fringe projection acquisition system, a speed measuring system and a data processing system. The mechanical support system is used for holding the fringe projection acquisition system and for arranging data transmission lines so as toconnect the fringe projection acquisition system and the data processing system for the purpose of data transmission; the fringe projection acquisition system projects N-frame sinusoidal structured light, which is generated by a computer, to the surface of a bulk material on a conveyer sequentially at certain frame rate through a DLP (digital light projector); a CCD (charge coupled device) synchronous takes a deformed fringe diagram modulated by bulk material stack height; the speed measuring system measures translational speed of a conveyer belt; the data processing system calculates bulk material weight according to deformed fringes, belt speed, and system parameters, and outputs measurement results to a user.

Description

technical field [0001] The invention belongs to the technical field of continuous measurement of bulk materials, and in particular relates to a test method for an on-line weighing device of a belt conveyor based on fringe projection. Background technique [0002] Online weighing equipment for bulk materials has a large amount of applications and a wide range of applications. As far as the industry is concerned, it is widely used in the processing, utilization, storage and transportation of bulk bulk materials, such as coal, metallurgy, power plants, coking plants, cement plants, pharmaceuticals, etc. Factories, tobacco factories, building materials, chemical fertilizers, alkali factories, salt factories and other large-scale bulk material processing and utilization enterprises, as well as docks, warehouses and other large-scale bulk material transportation and storage enterprises. As far as the application is concerned, it can be used for production management, guiding settl...

AI Technical Summary

Problems solved by technology

However, the nuclear scale has the defect of "shape error". Someone actually measured the measurement results of the nuclear scale when two bricks were laid flat and two bricks were stacked together, and found that the same two bricks were stacked in different shapes. The results given by nuclear scales are different. The results when stacked are significantly smaller than when they are placed side by side. The difference between the two is as high as 17%.

The existence of "shape error" is caused by the measurement principle of the nuclear scale, which determines that the measurement accuracy of the nuclear scale is relatively poor

[0004] In addition, electronic belt scales and nuclear scales are accumulative continuous weighing equipment, which can accurately give the total weight of large batches of materials in a long period of time, but cannot accurately give the "instantaneous amount" of materials in a short period of time

Obviously, it is difficult to meet the requirements of providing accurate "instantaneous quantity" of materials

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