ADSL-based Internet monitoring system of thermal solutions (1)

1. thermal network ADSL-based monitoring and control system architecture

1.1 overview

Urban heating network monitoring and control is an important component of municipal engineering, thermal network supervisor control system control node General geographical distribution of wider, it is difficult to use one access mode for the access for all nodes.

Currently more common access to a PSTN access modes, GPRS access, digital radio access, dedicated line access, etc. [1]

These access methods are applied, but there is a low-bandwidth, high running costs.

This article proposes an approach based on ADSL network monitoring system of heat to ADSL way node communication access. Its advantages are: (1) access convenience and General city telephone network coverage area can provide such access; (2) bandwidth, maximum achievable 2Mbps, can significantly improve the real-time monitoring; (3) investment; (4) the running cost is low.

1.2 system architecture

Thermal network ADSL-based monitoring system for the overall structure as shown in Figure 1, a typical hot network monitoring system consists of a control center and multiple control nodes.

Monitoring server is responsible for the data communication control node, the node receives the control's State data, and on the basis of thermal networks of health sent to the control node, resize the entire balance of heating heating network. The database server to save the day and historical condition data, data analysis and decision support; WEB server displays the heating network operation condition monitoring interface.

Thermal company has several thermal station, General each thermal station sets a control node, the control node consists of embedded systems.

Control node on the one hand through the sensor collection site for/return water temperature, flow, pressure, and other operating data and control solenoid valve, control valve and inverter, adjust the scene run parameters; on the other hand, the Internet through ADSL Modem access, will condition data transmission over the Internet to the monitoring center, control node also can receive the directives issued by the monitoring centre, adjustment on-site operating parameters. [2]

Figure 1: heat based on ADSL network monitoring system chart

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