Centralized control type monitoring system of electricity meter based on BACnet (a data communication protocol for building automation and control networks)

A monitoring system, control technology, applied in the direction of electrical program control, comprehensive factory control, etc., can solve problems such as incompatibility of solutions

Inactive Publication Date: 2011-04-27
HENAN UNIVERSITY
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Problems solved by technology

Obviously, it is inappropriate and unnecessary to fully implemen

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  • Centralized control type monitoring system of electricity meter based on BACnet (a data communication protocol for building automation and control networks)
  • Centralized control type monitoring system of electricity meter based on BACnet (a data communication protocol for building automation and control networks)
  • Centralized control type monitoring system of electricity meter based on BACnet (a data communication protocol for building automation and control networks)

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Embodiment Construction

[0024] Now, refer to figure 2 Describe in detail the structural block diagram of the centralized control meter monitoring system based on BACnet network. As shown in the figure, the entire meter monitoring system adopts BACnet network for centralized management and control. The entire system structure adopts a three-level control method, the lowest level is multiple field controllers, the second level uses regional control stations, and the third level uses central control stations. The field controller (DDC) has a self-developed BACnet distributed programmable microprocessor, and its model is EM-24-8. Such as figure 1 shown. The processor is a programmable distributed controller with independent operation, designed with MOTOROLA CMOS high-speed microprocessor, with 8K EEPROM program and 16K RAM data memory capacity, logic calculation speed 100msec; power supply 24VAC / 50-60HZ / 10VA; The network speed can reach 76.8Kbps, which is 100% in line with the BACnet MS / TP network c...

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Abstract

The invention relates to a remote monitoring and acquisition system of an electricity meter, in particular to a fieldbus type network monitoring system of an electricity meter based on BACnet (a data communication protocol for building automation and control networks). Aiming at overcoming the defects of the prior art that a large amount of labor and materials are needed for manual meter-reading monitoring, the invention provides the fieldbus type network monitoring system of the electricity meter based on the BACnet. The monitoring system of the electricity meter adopts three-stage control, a plurality of field controllers are adopted for lowest-stage control, area control stations are adopted for second-stage control, and a central control station is adopted for third-stage control; and the three-stage control nodes adopt a BACnet connection for communication, and the field controllers are BACnet dispersible programmable microprocessors. The fieldbus type network monitoring system of the electricity meter based on the BACnet is characterized in that each BACnet dispersible programmable microprocessor has a random-access memory (RAM) data memory unit which stores a dynamic private key corresponding to an address, and the private key can be updated when in restarting each time.

Description

field of invention [0001] The invention relates to a remote monitoring and collecting system for electric meters, in particular to a network electric meter monitoring system based on BACnet field bus. Background technique [0002] At present, the data collection work of electric meters is still completed by the traditional method of door-to-door door-to-door entry by over-standard personnel, which has many disadvantages. First, a large amount of manpower needs to be invested in meter reading work. The meter also reduces the safety of users. At the same time, there are also some inaccuracies in manual meter reading, which leads to corruption and bribery loopholes. With people's understanding of these disadvantages, some automatic overmeter systems have appeared, such as the automatic card-swiping type of the watt-hour meter. However, the above-mentioned method needs to be replaced with a new meter, and this card-swiping type of watt-hour meter is usually expensive. For some ...

Claims

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Application Information

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IPC IPC(8): G05B19/418
Inventor 张东生季超冯东栋夏保胜李善治
Owner HENAN UNIVERSITY
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