JPH0250520B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a distributed processing self-fire alarm system in which information is exchanged between a central receiver and a repeater, and the repeater performs processing operations independently of the receiver. It's about systems.

[Background technology] Conventionally, in this type of distributed self-fire alarm system, during maintenance and failure of terminal equipment such as fire detectors and smoke prevention equipment connected to district lines via repeaters and repeaters, Since each repeater performs a so-called distributed processing operation, in which each repeater performs processing operations independently of the processing operations of the receiver, it is necessary to perform the confirmation analysis on each repeater, which is less efficient than a so-called centralized monitoring system. It took a lot of time and effort to do so, and the repeater also required a maintenance structure, which led to problems such as the complexity of the circuit structure and high cost. Therefore, the present inventors have proposed a system in which the operation of each repeater is stopped and a predetermined repeater is operated for maintenance. During this period, the function of the fire alarm system stopped, causing problems such as missed alarms, and the disadvantage was that the characteristics of distributed processing could not be taken advantage of.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and its purpose is to enable analysis of the cause of failure of repeaters and terminal equipment on the receiver side, and to improve the circuit configuration on the repeater side. To provide a distributed self-fire alarm system which is simple and low-cost, and which prevents the self-fire alarm system from malfunctioning by performing distributed processing using the remaining repeaters that are not performing maintenance operations during maintenance mode. be.

[Disclosure of the Invention] The present invention connects the receiver 2 and each repeater ₃₁ ... via the transmission line 1, and each repeater ₃₁ ... has terminals such as a fire alarm 4 and smoke prevention equipment 5. The devices are connected, and the repeater 3 ₁ ... receives the detection signal from the connected fire detector 4 and performs distributed processing such as fire detection, bell control in the area, and control of the smoke prevention equipment 5.
Between the receiver 2 and each repeater 3 ₁ ..., the receiver 2 sequentially calls each repeater 3 ₁ ... to transmit control data such as fire tests to the repeater 3 ₁ ... by time-division multiplex transmission. Fire alarm from repeater 3 ₁ ...
In a distributed processing self-fire alarm system that exchanges information by returning information such as the operation of smoke prevention equipment, there is a normal mode in which the receiver 2 performs the above distributed processing and information exchange, and the repeater 3 ₁ ... A mode signal is sent to each repeater 3 ₁ to specify a maintenance mode in which distributed processing and information exchange are stopped and the repeaters _{3 1} perform predetermined maintenance operations, and a system disconnection mode in which only the above-mentioned distributed processing is performed. When in maintenance mode, a maintenance mode signal is transmitted to only a designated repeater to cause that repeater to perform maintenance operations, and a system disconnection mode signal is sent to each remaining repeater to cause the said repeater to perform distributed processing. It is characterized by causing the user to perform the following steps.

Embodiment FIG. 1 shows an embodiment circuit of the present invention, in which a receiver 2 cyclically transmits a transmission signal in the format shown in FIG. 2 to a repeater 3 ₁ through a transmission line 1. ing. The transmission signal includes a start mark ST that indicates the start of the signal, a mode signal MD that commands normal mode, maintenance mode, and system disconnection mode (described later), address data AD for calling repeater ₃₁ ..., and repeater ₃₁ . It is composed of control data CD that instructs the operations of... and a return standby signal RD that causes the monitoring information from the repeater 3 ₁ to be returned. The repeater 3 ₁ ... has a transmission signal processing section that receives transmission signals and returns monitoring information, a control output section that generates various control outputs based on control data, etc., and takes in monitoring information of connected terminal devices. It is equipped with a monitoring input section.

Now, when the operator on the receiver 2 side sets the normal mode, the mode signal MD of the transmission signal from the receiver 2 becomes the normal mode signal. In normal mode, when each repeater ₃₁ ... receives address data AD that matches its own address, it takes in the control data CD and performs operations such as fire tests and restoration of smoke prevention equipment based on the control data CD. and performs an information exchange operation in which the monitoring information of the terminal equipment, etc. input to the monitoring input section is returned to the receiver 2 through the transmission signal processing section during the reception period of the return standby signal RD. In addition, the monitoring input section receives a fire detection signal from the fire detector 4 connected to the repeater, performs signal processing to detect the occurrence of a fire, and based on this signal processing, the control output section receives the fire detection signal from the fire detector 4 connected to the repeater. A repeater 3 that rings the corresponding district bell and drives the corresponding smoke prevention equipment 5.
₁ ...It is designed to perform its own distributed processing operation.

On the other hand _{, the receiver 2 side that has instructed the normal mode performs overall monitoring and control of the system based on the monitoring information from each repeater 3 1 ....}
It is possible to give commands to test and control terminal equipment connected to the system.

Now, if an abnormality is detected during a test or the like, the mode is switched to maintenance mode on the receiver 2 side, and a maintenance mode signal is sent when a predetermined repeater is called, and a system switching mode signal is sent when other repeaters are called. In other words, the repeater to which the maintenance mode signal has been sent, for example ₃₂ , stops the above-mentioned distributed processing and information exchange. Control data sent from receiver 2 instructs special operations related to maintenance.
It imports CDs and performs special operations. Here, as a dedicated operation, if you set in advance an operation to confirm the signal transmission of line L, the called repeater 3
In _{step 2} , the dedicated operation described above is performed and information on the result of the operation is sent back to the receiver 2 side. Therefore, on the receiver 2 side, the state of the line L in the called repeater 3 ₂ can be confirmed. Further, a system disconnection mode signal is sent to the remaining repeaters 3 ₁ , 3 _{3 .} . . , so that each of the repeaters 3 ₁ , 3 ₃ . . . performs only a distributed processing operation. Therefore, even in maintenance mode, repeaters 3 ₁ , 3 ₃ .
It controls the smoke prevention equipment 5.

Incidentally, FIG. 4 shows a flowchart showing the above-mentioned operation.

[Effect of the invention] The present invention provides a distributed processing self-fire alarm system,
A normal mode in which the receiver performs the distributed processing and information exchange; a maintenance mode in which the repeater stops the distributed processing and information exchange and causes the repeater to perform a predetermined maintenance operation; and a maintenance mode in which only the distributed processing is performed. A mode signal that specifies the system disconnection mode to be performed is transmitted to each repeater, and when in maintenance mode, a maintenance mode signal is transmitted only to a designated repeater to cause that repeater to perform maintenance operation, and a maintenance mode signal is transmitted to each repeater to cause that repeater to perform maintenance operation. Since the system sends a system disconnection mode signal and causes the repeater to perform distributed processing operations, the cause of the failure on the repeater side can be analyzed on the receiver side, resulting in the same effect as a centralized system. This makes it possible to centrally manage the repeaters, which eliminates the need for maintenance circuitry on the repeater side, resulting in a low-cost repeater.Furthermore, even in maintenance mode, it is possible to Since the repeater performs distributed processing, it has the effect of preventing missed notifications due to system stoppage.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram of an embodiment of the present invention, Fig. 2 is a format of the transmission signal of the same, Fig. 3 is a diagram explaining the operation during maintenance operation of the same, and Fig. 4 is a flowchart for explaining the operation of the same. 1 is a transmission line, 2 is a receiver, 3 ₁ ... is a repeater, 4 is a fire detector, and 5 is a smoke prevention equipment.

Claims (1)

[Claims] 1 Connect the receiver and each repeater via a transmission line, and connect terminal equipment such as a fire detector or smoke prevention equipment to each repeater, and the repeater will receive the detection from the connected fire detector. Fire detection by receiving signals,
Processing such as bell control within the area and control of smoke prevention equipment, etc. is performed by distributed processing independent of the processing operation of the receiver, and time-division multiplex transmission is used between the receiver and each repeater. Distributed processing self-fire alarm system that exchanges information by sequentially calling repeaters and transmitting control data such as fire tests to the repeaters, and returning information such as fire alarms and the operation of smoke prevention equipment from the repeaters. In the system, there is a normal mode in which the receiver performs the above-mentioned distributed processing and information exchange, a maintenance mode in which the above-mentioned distributed processing and information exchange in the repeater is stopped and the repeater performs a predetermined maintenance operation, and the above-mentioned distributed A mode signal that specifies a system disconnection mode in which only processing is performed is transmitted to each repeater, and when in maintenance mode, a maintenance mode signal is transmitted only to a designated repeater to cause that repeater to perform maintenance operations, and the remaining A distributed processing self-fire alarm system characterized in that a system disconnection mode signal is sent to a repeater to cause the repeater to perform the above-mentioned distributed processing operation.