Metering vertical screw conveyer

Abstract

The invention belongs to the bulk material continuous metering technology field and especially discloses a metering vertical screw conveyer. The metering vertical screw conveyer based on a stripe projection profilometry comprises a vertical screw conveyer main body system, a weighing bridge system, a stripe projection acquisition system, a speed measurement system and a data processing system. Theweighing bridge system is used to convey a weighing bulk material, place a stripe projection acquisition system and arrange a data transmission line so as to connect the stripe projection acquisitionsystem and the data processing system for data transmission. The stripe projection acquisition system sequentially projects the N frames of sinusoidal structure light generated by a computer on the bulk material surface of a weighing bridge as a certain frame speed via a digital light projector. A high-speed camera synchronously shoots a deformed fringe pattern modulated by a bulk material stacking height. The speed measurement system measures a transporting belt translation speed. A data processing system calculates a bulk material weight based on deformed stripes, a belt speed, and system parameters, and outputs a measurement result to a user.

Description

Technical field [0001] The invention belongs to the technical field of continuous metering of bulk materials, and specifically discloses a metering vertical screw conveyor. Background technique [0002] The online weighing equipment for bulk materials has a large application volume and a wide range. As far as the industry is concerned, it is widely used in the processing, utilization, storage, and transportation industries of bulk materials, such as coal, metallurgy, power plants, coking plants, cement plants, and pharmaceuticals. A large number of bulk material processing and utilization companies such as factories, tobacco plants, building materials, fertilizers, alkali plants, salt plants, and docks, warehouses and other bulk material transportation and storage companies. In terms of application purposes, it can be used for production management, guidance and settlement, and constitute various batching systems and automatic control systems. [0003] On-line weighing equipment f...

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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