KR20010035924A - Monitoring and controling system using spread spectrum real time power for building ibs - Google Patents

Abstract

PURPOSE: A remote supervisory and a control device for building up an intelligent building system using a power line is provided, which use electric power line without using an extra communication line. CONSTITUTION: The remote supervisory and a control device for building up an intelligent building system using a power line is characterized by being comprised of: a channel transferred information and a signal; a power line modem modulating and demodulating the signal transferred from the channel; a repeater amplifying the signal transferred from the channel; a load tranducer measuring the energy load of the each part inside the building; and a part for monitoring and controlling each devices.

Description

MONITORING AND CONTROLING SYSTEM USING SPREAD SPECTRUM REAL TIME POWER FOR BUILDING IBS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and control apparatus, and more particularly, to a remote monitoring and control apparatus using real-time power using a power line without installing a separate communication line in building an intelligent building system.

The data transmission method using the power line has great utility value in that the existing infrastructure can be used as it is without additional signal line addition.In recent years, the transmission of information through the power line is a development of the communication method. High speed communication is enabled.

Examples currently in use include the control of temperature and humidity in constant temperature and humidity containers, including refrigerated containers, which are commonly used for the protection of products against environmental impacts in import or export transport, the monitoring of control conditions and the detection of abnormal conditions. Slave modems used as a means to carry out their functions are very useful, and in 1991 the IS0 standard for container monitoring was proposed, and the technical committees carried out communication procedures, data transmission, conversion transmission, protocol and remote The technical standard for control lamps was registered in 1992 and set as international standard.

The transmission of information through the power line is a high-speed communication of more than 100kbps using the spread spectrum communication method due to the development of communication method, but the current domestic technology is showing a significant difference.

The development of this communication method can be used as a LAN system based on the power line, so it can be used as a technology that can be used in small POS networks, remote meter readings, premises networks, factories and machine automation networks, and in particular, through the invention It can be applied to TV rating system which is essential for remote control and monitoring device or broadcasting station audience survey required for infrastructure.

Accordingly, an object of the present invention is to provide an apparatus in which efficient central control is possible only by a power line without any additional wiring and is always performed in real time remote monitoring and remote control.

In order to achieve the above object, the present invention provides a remote monitoring and control device comprising: a channel through which information and signals are transmitted;

A power line modem for modulating and demodulating a signal transmitted through the channel;

A repeater for amplifying a signal transmitted through the channel;

A load transducer for measuring the energy load of each local part in the building;

A control drive for controlling driving the above components; And

It characterized in that it comprises a monitoring / control unit for monitoring and controlling the above devices with each other.

In addition, the channel uses a power line, characterized in that the power line modulator / demodulator modulates / demodulates the received signal by a spread spectrum method, the repeater is a spread spectrum method, characterized in that Examples of local parts include room temperature / humidity, duct temperature / humidity, lighting management, pipe temperature / pressure, gas and water management, premises broadcasting, communications and LAN, access and parking management, and emergency management. have.

These and other objects, advantages and features of the present invention will become more apparent from the following description set forth in connection with the accompanying drawings.

1 is a view showing the configuration of a network related to a remote monitoring and control apparatus using a power line according to the present invention.

1 is a view showing the configuration of a network related to a remote monitoring and control apparatus using a power line according to the present invention. As shown in FIG. 1, a remote monitoring and control apparatus using a power line according to the present invention includes a power distributor for distributing power introduced through an outdoor transformer, a power line modem for modulating / demodulating a signal transmitted through a power line, and a power line. A repeater functioning to amplify the signal transmitted through the load transducer for measuring the energy load and monitoring the respective components of the remote monitoring and control device using a power line and a remote monitoring and control system according to the invention. It includes a center to control.

The power line modem modulates / demodulates signals transmitted along the power line in a spread spectrum method. According to shannon's law on channel capacity, even if the signal-to-noise ratio is not good, increasing the bandwidth has a low error rate so that the signal can be transmitted and received well. Therefore, the power line modem according to the present invention is capable of modulating / demodulating a signal by using a spread spectrum method to spread the frequency bandwidth like the CDMA method currently used in the market, so that even when noise is included in the transmission of the signal. In the case of receiving, there is an advantage in that it can receive a high quality signal due to the good .S / N ratio, and in the spread spectrum communication, direct spread, frequency hopping, and pulse wave frequency modulation FM) is a direct spreading method that modulates a carrier by a signal sequence having a bit rate that is much larger than an information signal bandwidth. The modulation method is PSK at the same rate as a code, and the frequency hopping method is a code sequence. The carrier frequency is transmitted in correspondence with the code state in the prescribed order, and the carrier frequency is synchronized with the change of the code state. Hop all elements between sets. Pulsed frequency modulation is a method of sweeping a carrier frequency in a wide frequency band according to a predetermined pulse synchronization.

Comparing the performance of IBS (Intelligent Building System) related communication method with power line LAN (Local Area Network), wireless LAN and wired LAN, respectively, power line LAN utilizes power line as transmission medium, it is safe in stable line, and protocol is CSMA. / CD is used, transmission speed is over 100Kbps, premises transmission distance is possible in line belonging to transformer, and it can be easily applied to existing buildings, and it is easy and inexpensive in terms of network maintenance, change and expansion It is free for gender, no permit is required, and the relevant standard is ISO 10368.

Wireless LAN uses radio waves or infrared rays as a transmission medium, interferes on the stable line, protocol uses CSMA / CA, transmission speed is 1.6 Mbps or more, and transmission distance within 45m is possible and applied to existing buildings. This can be achieved by removing the obstruction, is easy and inexpensive in terms of network maintenance, free of modification and scalability, permits need to be obtained from the FCC, and the relevant standard is 802.11 IEEE.

The wired LAN uses a dedicated line as a transmission medium, it is safe on the stable line, the protocol uses CSMA / CD, the transmission speed is 4 ~ 10 Mbps or more, and the transmission distance of the premises is possible within the line of 185m. It can be easily applied to buildings, is difficult and expensive in terms of network maintenance, difficult and cumbersome in terms of change and expandability, no permits are required, and the relevant standard is IS0 8802-3.

As we have seen, powerline LANs have many advantages over wired or wireless LANs.

Building energy performance measurement, diagnosis, evaluation, and transmission technology are essential in the technical field of the next generation intelligent building system (IBS), and in particular, data transmission using power lines can use existing infrastructure without additional signal lines. The utility value is great in the power line, but the other applications, but FSK or ASK power line MODEM which is generally used at present is relatively limited in utilization due to the relatively high data transmission error rate, the present invention employs a spread spectrum method By configuring the power line modem, the error rate can be minimized.

While preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only and various changes and modifications may be made without departing from the spirit and scope of the following claims. It must be understood.

Claims (5)

A channel through which information and signals are transmitted; A power line modem for modulating and demodulating a signal transmitted through the channel; A repeater for amplifying a signal transmitted through the channel; A load transducer for measuring the energy load of each local part in the building; A control drive for controlling driving the above components; And Remote monitoring and control device comprising a monitoring / control unit for monitoring and controlling the above devices with each other The remote monitoring and control apparatus according to claim 1, wherein said channel is a power line. The remote monitoring and control apparatus according to claim 1, wherein the power line modulator / demodulator modulates / demodulates the received signal by spread spectrum. The remote monitoring and control apparatus according to claim 1, wherein the repeater is based on a spread spectrum method. 10. The method of claim 1, wherein each local part of the building comprises room temperature / humidity, temperature / humidity in ducts, lighting management, temperature / pressure in piping, gas and water management, premises broadcasting, communications and LAN, access and parking. Remote monitoring and control device, characterized in that the management and emergency management.