Coal washing plant multi-stage belt transmission multi-touch screen multi-can board parallel remote centralized control device

Abstract

A multistage band transportation multi-touch-screen multi-CAN-board parallel long-distance centralized control device for a coal washery comprises a multistage band-type transportation monitoring device for a coal washery. Multiple touch screens are connected in parallel with the CAN boards, and then are connected to a PLC serial port by means of RS 485 serial port lines. A band-type brake detection switch and a contact feedback detection switch of a main contactor are connected to input / output endpoints of the PLC; in a case in which secondary machines encounter communication faults, the faults can be found in time. The device has protection functions for a band-type brake, smoke, coal stacking, skidding, a motor temperature, a front roller temperature, a rear roller temperature, a front sideslip, a middle sideslip and a rear sideslip, and can carry out disabling / enabling setting in the touch screens; currents, voltages and powers are displayed in the touch screens, a multi-touch-screen multi-CAN-board long-distance monitoring function can be implemented, the device is suitable for processing multiple pieces of data, the data transmission is fast, the signal attenuation is small, and the anti-interference capability is high, the functions are complete, and the performance is reliable.

Description

technical field [0001] This patent relates to a multi-touch screen multi-CAN board remote centralized control device, in particular to a coal washing plant multi-stage belt conveyor multi-touch screen multi-CAN board remote centralized control device. Background technique [0002] The main mode of coal transportation in the coal washing plant is belt conveying. According to the actual situation of the coal washing process in the coal washing plant, it has the characteristics of multi-stage belt conveying, and the distance of belt conveying is relatively long, usually hundreds of meters or thousands of meters away. The inspectors need to monitor the devices in different places in time, and the multi-stage belt conveyor has a lot of monitoring data, and multi-point monitoring is required. The existing monitoring system only monitors on the main control cabinet, or increases the monitoring of the host computer, which cannot meet the requirements of multi-point, multi-screen and...

AI Technical Summary

Problems solved by technology

3. The method described in "Delta DOP realizes multi-screen function in one machine, modern manufacturing, 2007.7.5" and "Application of multi-screen technology in one machine in liquid ammonium nitrate storage control system, automation and instrumentation, 2013.7.15" The first touch screen is used as the main screen as the main station, and the PLC and other touch screens are used as the slave stations. The touch screen of the touch screen continuously sends request packets to the PLC. After the PLC accepts the request, it needs to continuously reply to the touch screen with a response. The CPU usage rate of the PLC is high, and most of the CPU resources of the PLC are consumed during the communication response process; the response of the PLC is interrupted. Given, it must continuously respond to the touch screen as the master station, and the query occupancy rate of the touch screen is high; PLC must respond in an interrupt mode, programming is difficult, and timeout requirements are strict

2. The data exchange between the remaining multiple touch screens and PLC needs to go through the first touch screen as a transfer station, and the data exchange on multiple CAN boards (both CAN bus processing and data transmission circuit boards) also needs to go through the first touch screen transfer stand

[0004] For the multi-stage belt conveying of the coal washing plant, it has multiple touch screens and multiple CAN boards. Since the main function of the touch screen as a transfer station is to display, the ability to process a lot of data is limited, resulting in a slow data transmission speed, or even Crash; Similarly, the instructions and data transmitted by the PLC to each touch screen also need to pass through the touch screen as a transfer station, and the speed will be very slow or crash

Seriously affect the real-time and reliability of the centralized control device, making the equipment unusable

When the touchscreen acting as a relay station fails, the entire unit becomes unusable

Furthermore, due to the touch screen used as a transfer station, the transmission distance increases accordingly. For long-distance monitoring and data transmission, the signal of data transmission will be attenuated and interference will be increased, thereby affecting the accuracy of data transmission. The above connection method Difficult to meet the needs of coal mine safety production

The multi-stage belt conveying monitoring of the coal washing plant still has some incomplete and reasonable aspects, which need to be improved

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