Power line type field bus coal bunker continuous level detection device

Abstract

The invention discloses a power line type field bus coal bunker continuous level detection device, which comprises a plurality of continuous level meters and a power supply system connected with the plurality of continuous level meters respectively. Each level meter comprises an outer shell, a level sensor, an analog / digital (A / D) converter which is connected with the level sensor and performs A / D conversion on a signal detected by the level sensor, a micro control unit (MCU) processor connected with the A / D converter, and an input / output (I / O) communication interface connected with the MCU processor, wherein the MCU processor is connected with a main programmable logic controller (PLC) control system through the I / O communication interface and a looped network consisting of cables; and each level meter is connected in parallel at a control end of the main PLC control system through the looped network. The device is simple in structure, reasonable in design, convenient to install and arrange, stable in signal transmission, simple and practicable, and can effectively solve the problem of remotely monitoring a plurality of continuous level signals in a coal conveying system in real time.

Description

technical field [0001] The invention belongs to the technical field of coal bunker continuous material level detection, in particular to a power line type field bus coal bunker continuous material level detection device. Background technique [0002] At present, there are a large number of continuous material level signals in coal bunkers in thermal power plants. On the one hand, they are used as the basis for automatic coal blending in the coal transportation automation system. Automatic control establishes the necessary interlocking protection relationship. In engineering applications, it is customary for thermal power plant coal transportation automation systems to set up signal distributors for the continuous level gauges of each bunker, and use a separate cable to introduce the distributed signals into the "remote station at the coal bunker floor", and the other way to the remote station. A separate cable is introduced into the DCS system, and a large number of cables ...

AI Technical Summary

Problems solved by technology

In engineering applications, it is customary for thermal power plant coal transportation automation systems to set up signal distributors for the continuous level gauges of each bunker, and use a separate cable to introduce the distributed signals into the "remote station at the coal bunker floor", and the other way to the remote station. A separate cable is used to introduce the DCS system, and at the same time, a large number of cables are consumed to solve the power supply problem of the material level gauge and signal distributor

Therefore, the existing continuous material level signal transmission scheme has the problems of large amount of control cables, high one-time investment cost of the project, long construction period, difficult system operation and maintenance, and serious on-site strong electrical interference of the system.

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