Self-adaptive control method based on video recognition for belt conveying system

Abstract

The invention discloses a self-adaptive control method based on video recognition for a belt conveying system. The self-adaptive control method comprises the following steps that (1) the instant total coal quantity and the instant coal quantity distribution on a belt conveyer are obtained dynamically; (2) the total coal quantity and the coal quantity distribution information which are obtained in the step (1) are sent to a self-adaptive optimum control server, and a frequency converter outputs a current frequency to adjust the operating speed of the belt conveyer; and (3) the operating state of a belt is monitored through a programmable logic controller (PLC), and feedback control is conducted by combining the motor current and the coal quantity distribution information so that the speed of the belt conveyer can meet a predetermined requirement. The self-adaptive control method based on video recognition for the belt conveying system has the advantages that configuration is flexible, the performance is excellent, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of belt transportation, and in particular relates to an adaptive control method of a belt transportation system based on video recognition. Background technique [0002] In large and medium-sized coal mines, the boundary of the mine field is expanding, the belt conveyor line is continuously extended, and the number is continuously increasing. The frequency converter has also become the main equipment driven by the belt conveyor. There are about 100 frequency conversion driven belt conveyors in the Shenhua Shendong mining area alone (supporting about There are more than 300 sets of inverters, and the power of supporting motors is mainly: 500KW, 800KW, 1000KW, 1200KW, 1600KW, 1800KW, etc.), but at present, Shenhua, China Coal Mining Area, and even the whole country have the following problems in the use of inverters: 1 ) As far as the cost is concerned, the frequency converter is much higher than the tradition...

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Problems solved by technology

[0002] In large and medium-sized coal mines, the boundary of the mine field is expanding, the belt conveyor line is continuously extended, and the number is continuously increasing. The frequency converter has also become the main equipment driven by the belt conveyor. There are about 100 frequency conversion driven belt conveyors in the Shenhua Shendong mining area alone (supporting about There are more than 300 sets of inverters, and the power of supporting motors is mainly: 500KW, 800KW, 1000KW, 1200KW, 1600KW, 1800KW, etc.), but at present, Shenhua, China Coal Mining Area, and even the whole country have the following problems in the use of inverters: 1 ) As far as the cost is concerned, the frequency converter is much higher than the traditional driving device. However, the frequency converter only plays the role of soft start at present, and does not give full play to the advantages of variable frequency drive; 2) There is currently no effective means to realize the instantaneous coal volume and Instantaneous coal distribution detection, therefore, it is impossible to automatically adjust the frequency converter power supply through the program, and control the motor speed, and control the speed of the belt conveyor; for safe production, the belt conveyor is currently running at full speed; 3) Belt conveyors in coal mines The conveyor has a large installed power and runs for a long time, and it mostly works in a state with ample installed capacity; the load changes greatly, and it is often in the condition of light load operation and a wide range of load changes, resulting in low power consumption efficiency of the belt conveyor; 4) The full-speed operation of the belt conveyor brings the loss of the belt surface and the wear and tear of hardware equipment such as idlers, which shortens the production and use efficiency; 5) There is no transportation system composed of multiple belt conveyors. Adaptive optimal speed control, each belt has multiple on-site workers for operation and maintenance, and the cost of operation and maintenance personnel is high

[0005] 2) At present, most of the belt conveying material measurement devices use electronic belt scales, nuclear scales, etc., because only one set of devices is installed on one belt conveyor, and there are reasons for the installation location, so it cannot reflect the instantaneous distribution of materials on the belt conveyor, resulting in speed regulation Algorithms are difficult to implement;

[0006] 3) Communication equipment failures and communication line interruptions often occur in coal mine production, especially in fully mechanized mining face. In operation, in this case, how to estimate the operating state of the equipment through different information sources will have a great impact on the robustness of the control system.

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