JPS5994199A - Remote management system for building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a building management system that remotely and centrally manages equipment in a building.

[Prior art]

Before explaining the present invention in detail, FIG. 1 shows a conventional example of a general building remote management system.

A central monitoring device is installed in the center building, which is the center of monitoring, and building management terminal devices are installed in each building (AN). Each of the above-mentioned devices is connected by a line to enable data transmission, but in most cases, a dedicated line is used to connect them as shown in FIG. That is, the central processing unit 1 of the central monitoring device 21 and the processing circuit 7 of the building management terminal device 22,
This is a system in which multiple connections are made to the transmission control circuit 2.7 and data is sent and received. In this case, each hardware will be simplified, but it will require a dedicated, always-exclusive line.There is no problem if you use a private line, but if you use a public company line, there will be running costs. It takes. In the case of normal remote monitoring and control, the state of data at the site is generally monitored through short-term scanning, and if a change occurs, a corresponding control signal is transmitted from the central location.
When using a building remote management system to remotely manage equipment failures and abnormalities, especially in small buildings, these on-site signals occur infrequently, and it is often not a good idea to use a dedicated line. The same applies to cases where a building management terminal device is provided with a certain degree of local monitoring and control functions.

Therefore, a system using a subscriber telephone line as in the system shown in FIG. 2 is conceivable. In this case, each has an automatic line connection circuit 4, 9 and an automatic line reception circuit 3, 10,
When necessary, the line automatic connection circuit 4.9 performs dialing processing to call the other party, connects the line using the line automatic reception circuits 3 and 10 of the other party, and performs data transmission.

In the case of this method, including preventing line collisions,
In many cases, the central monitoring device calls each building management terminal device using a polling method and starts data transmission. Therefore, even if there is no change in the status on the building side, the line is connected, so there is a problem that the number of line connections increases.

[Purpose of the invention]

The purpose of the present invention is to simplify the peripheral circuits of central monitoring equipment and building management terminal equipment as much as possible in a building remote management system, reduce capital investment, and minimize the number of times telephone lines are used during data transmission. The purpose is to construct a circuit that can be kept to a minimum.

[Summary of the invention]

According to the results of building remote management systems that mainly monitor failures and abnormalities, the actual occurrence of failures and abnormalities in building equipment is relatively rare, and there is little need for constant monitoring using dedicated lines.

The main point of the present invention is to adopt a system that uses subscriber telephone lines,
Furthermore, we decided to eliminate the line connection function from the central monitoring equipment side. An alarm discrimination circuit is provided in order to minimize the number of alarms issued from the building management terminal device.

[Embodiments of the invention]

An embodiment of the present invention will be explained with reference to FIG.

The line between the central monitoring device 21 and the building management terminal device 22 is
Although this is a connection method using the subscriber telephone line 15, the line automatic connection circuit 9 is provided only on the building management terminal device 22 side and not on the central monitoring device 21 side. That is, the central monitoring device 21 side is always on the receiving side, with only the line automatic receiving circuit 3.

The building management terminal device 22 receives signals from on-site equipment at regular intervals via the input/output control circuit 13 under the control of the terminal processing device 7, and stores them in a buffer. The change detection circuit 12 has a buffer for input data in two areas, stores old data and new data, and determines whether there is a change in the data. When a change is detected, the data is passed to the alarm determination circuit 11 and also to the terminal processing device 7. The alarm determination circuit refers to a preset alarm condition file and determines whether the change signal should be transmitted to the center. The provision of this circuit is one of the features of the present invention. That is, the status signals of the field equipment 23 that are being received are not only failure signals and abnormality signals that are required centrally, but also include signals such as equipment operation, stop status, power source, and off status. These include schedule start/stop control, intermittent operation control, etc., which are one of the program processing functions of the terminal processing device 7. Also includes equipment. Whenever these devices stop operating locally, this alarm judgment circuit controls them so that they are not connected to the central line. This circuit is made to perform multiple processes by storing the conditions for issuing a report in advance as a file, and the conditions in the file can be changed. In this manner, when the alarm conditions are met, the terminal processing device 7 activates the automatic line connection circuit 9, performs automatic dialing processing, and transmits the call to the central monitoring device 21 via the subscriber telephone line 15. The line automatic reception circuit 3 is operated to connect the line between the central monitoring device 21 and the building management terminal device 22.

Thereafter, data is transmitted via the transmission control circuit 2.8. In this way, data transmission can be performed only when the alarm conditions are met.

The above processing flow is shown in FIG.

When the building management terminal device 22 is provided with a local control function, or when the scale of the building increases to a certain extent, the building may also have an operator, although not full-time. In addition, in buildings where there is a manager only during the day and the building is unmanned at night, the central monitoring device may manage the building only at night, and the building itself may manage the building during the day. In such a case, Figure 3,
By adding the functions indicated by the broken line in FIG. 4, it is possible to transmit data to the center only when necessary. That is, in this case, if the normal alarm condition is satisfied, an alarm is first output to the display and operation section 14. When the manager or operator is in the building, it is normal to perform an alarm reset operation, so the terminal processing device monitors the time until the alarm is reset, and if the alarm is not reset even after the monitoring time has elapsed. Only then will it be determined that the administrator is absent, and will the process be sent to the central office. By adding such a processing circuit, if the information that is desired to be kept only on the building side is operated on the building side, it will not be transmitted to the center, and only the data that needs to be transmitted to the center will be transmitted.

In the figure, 5 is a storage device, 6 is a display device, 8 is a transmission control circuit, and 13 is an input/output control circuit.

〔Effect of the invention〕

According to the present invention, compared to conventional systems, the number of line connections can be reduced to the minimum necessary, and the usage fee for subscriber lines can be reduced. In addition, by reducing unnecessary line connections, line traffic on the central monitoring equipment side is eased, and the number of lines on the central side and the processing capacity of the central processing unit can be reduced, reducing equipment investment costs. It can be lowered.

[Brief explanation of drawings]

1 and 2 are block diagrams of a conventional remote monitoring and control system, FIG. 3 is a block diagram of a remote building management system according to the present invention, and FIG. 4 is a processing flow diagram of a building management terminal device. 1...Central processing unit, 2...Transmission control circuit, 3...
・Line automatic reception circuit, 4...Line automatic connection circuit, 5.
... Storage device, 7 ... Terminal processing device, 8 ... Transmission control circuit, 9 ... Line automatic connection circuit, 11 ... Alarm judgment circuit, 12 ... Change detection circuit, 13 ... - Input/output control circuit, 14... Display, operation unit, 15... Subscriber telephone line, 21... Central monitoring device, 22... Building management terminal device.

Claims (1)

[Scope of Claims] 1. Between a building management terminal device having a circuit for receiving status signals of equipment and a data transmission circuit, and each of the building management terminal devices installed in a plurality of buildings, A system in which a central monitoring device consisting of a circuit that can be connected via a line for data transmission and a processing device is located at a central location, and the status of the equipment in each building is managed remotely from that location. wherein the building management terminal device is provided with a signal change detection circuit, an alarm determination circuit, and an automatic line connection circuit, and when the change detection circuit detects a change in the state of equipment, the condition satisfies the alarm condition. The building remote management system is characterized in that only when the automatic line connection circuit is activated and the line is connected from the building management terminal side. 2. Claim 1 is characterized in that an alarm is displayed on the display and operation unit connected to the building management terminal device, and the alarm condition is satisfied if the alarm is not reset for a certain period of time or more. Building remote management system.