Control method for double helix differential definite quantity conveyer system

Abstract

The invention relates to a double helix differential definite quantity conveyer system and a control method of the double helix differential definite quantity conveyer system. The technical scheme includes that the double helix differential definite quantity conveyer system is connected by a double helix conveyor and a double helix differential definite quantity control device. The double helix conveyer comprises a machine body, a feed inlet, a discharge outlet, a main helix, a main helix motor, an auxiliary helix and an auxiliary helix motor. The double helix differential definite quantity control device comprises a main control unit, a weighing sensor, a man-machine interaction device, a switching value input and output module, a main helix driver and an auxiliary helix driver. The control method of the double helix differential definite quantity conveyer system comprises the following steps: digital filtering and feature analysis are conducted on collected weight value, weight information and impact information are respectively extracted, impact value introduced in the descending process of scattered materials in the weight information is filtered, and then estimated stagnating hollow weight value is added to the weight information, and estimated stagnating hollow weight value compensation is conducted. The double helix differential definite quantity conveyer system and the control method of the double helix differential definite quantity conveyer system have the advantages of effectively improving production efficiency, lowering production cost, and meeting accuracy requirements of automatic weighing of the scattered materials.

Description

technical field [0001] The invention belongs to the technical field of conveyors, in particular to a double-helix differential quantitative conveying control method. Background technique [0002] In the process of automatic weighing of bulk materials, screw conveyors are usually used to undertake the task of accurately feeding electronic scale equipment. The existing screw conveyors are single-screw conveyors, and the screw conveyor is designed as an involute screw, that is, the screw of the screw conveyor is expanded from a small pitch to a large pitch in sections, and when the screw advances the material, the bulk The material presents a conveying state in which the feeding amount gradually decreases in the spiral U-shaped groove, achieving the purpose of micro-feeding, so as to control the weighing accuracy to meet the requirements. At this time, in order to meet the needs of high-precision weighing, DC motors or frequency modulation motors are generally used to control ...

AI Technical Summary

Problems solved by technology

[0004] 1. The screw jog feeding sometimes exceeds the set value and allowable error, which makes the weighing fail; because the equipment is working in a sealed state during automatic weighing, when the weight is insufficient, the control program can operate the equipment to gradually add materials, But when the weighing fails, it can only be handled manually, which will interrupt the automatic weighing operation, waste time and work, and may cause deep pollution of the environment.

[0005] 2. The weighing operation time is long, especially the slow speed and jog feeding operation consume most of the weighing operation time, which seriously limits the freedom of automatic weighing equipment to adapt to the production process requirements, making the selection of automatic weighing equipment extremely restricted. big limit

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