JPS60176197A - Monitor controller for fire prevention - 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] This invention can be used in fire alarm systems, smoke prevention control systems, gas leak alarm systems, theft alarm systems, etc. where multiple terminal devices are centrally monitored and controlled by a solid device. The present invention relates to a suitable disaster prevention monitoring and control device.

Conventionally, as shown in Fig. 1, a plurality of terminal devices T such as smoke detectors, temperature detectors, photodetectors, gas leak detectors, fire door exhaust dampers, etc. are appropriately grouped and branch lines L1 are connected for each group.
~ n, and connect the branch lines of each group to the main line K extending from the solid equipment C to form a transmission line between the solid equipment C and the terminal T, and mutual communication via the transmission line. Disaster prevention monitoring and control devices have been proposed that perform monitoring and control by sending and receiving signals. However, in such conventional equipment, if a short-circuit failure occurs in just one part of the transmission line consisting of the branch line and the main line, the entire transmission line becomes unusable, and the equipment itself stops functioning. It had a serious drawback.

Therefore, in the disaster prevention monitoring and control device according to the present invention, a switching means is provided at each connection point between the trunk line and each branch line to individually select and disconnect or connect the lines. By providing a detection means for detecting a failure in the transmission line, the drawbacks of the conventional device described above are eliminated, and will be described below with reference to the drawings.

FIG. 2 is a schematic configuration diagram of an embodiment of the disaster prevention monitoring and control device according to the present invention, in which a plurality of terminals 3T are appropriately divided into groups and connected to the supports iLt~n for each group, as in the past. There is. Each of the branch lines L1 to Ln is connected to the main line K via switching contacts, which will be described later. At the proximal end of the trunk,
A solid device C is provided to process information obtained from each terminal T and to send control signals to each terminal T as necessary. Switches S1 to Sn as switching means are provided at each connection between the main line and each branch line L1 to Ln, and as described above, the switching contacts S attached thereto are as follows:
Disconnect or connect trunk # to branch ML. The switches S1 to Sn are connected to individual lines B1 to Bn extending from the middle IC, so that they can be individually selectively driven from the solid device C side.

The operation of the disaster prevention monitoring and control device according to the present invention configured as described above will be explained according to the flowchart of FIG. 4. For example, suppose that a short circuit failure occurs in the m4th branch line Lm. Then, the failure detection means provided in the solid equipment C detects that a failure has occurred in one of the transmission links consisting of the trunk NK and the branches 11L1-n, although it cannot be specified. When this failure occurs, the entire transmission line becomes unusable.

Therefore, on the solid equipment C side, the fault location is detected and the function of the transmission line is restored according to the processing procedure shown in FIG.
That is, when this processing procedure is started -g, all switching devices S1-n are driven in step 1, and all switching contacts S1-n are opened.

As a result, all the branch branches L1 to Ln are separated by the main line. Next, the process proceeds to step 2, in which it is determined whether or not a failure detection signal is generated from the failure detection means. In other words, the fact that a failure detection signal is occurring even at this stage means that it can be determined that a failure has occurred in the trunk @, so if the failure detection signal is occurring, proceed to step 3 and determine that there is a failure in trunk K. The occurrence is registered, a message to that effect is displayed as necessary, and the post-processing is ended.

In this way, if a failure occurs in the main line itself, it is impossible to recover the function of the transmission line between each branch line L1 to Ln.
We must take other measures to repair the main line as soon as possible. However, here it is assumed that the m-th branch line Lm has failed, so in step 2, the failure detection signal disappears and it can be determined that the main line is normal, so it is time to check each branch line L1 to n. Transition.

Therefore, in step 4,
．． Set the ILL number B to 1 and proceed to step 5. In step 5, the switching device S1 corresponding to the first branch line L1 is selected and driven, and its switching contact θ1 is closed. After connecting this first support 14Lt to the main line K, it is determined in step 6 whether or not a failure detection signal is generated. Here, since the branch lines other than the m-th one are normal, there is no way that a signal will be generated, and while switching contact S1 remains closed, the number B of the branch line to be checked in the next step 7 is changed to the next number 2. Set to . In step 8, it is determined whether the set branch line number B = 2 is larger than the final branch line number n or it is a fortune-telling, but of course the final number n has not been reached, so
Returning to step 5, the switching contact S2 is closed and the failure detection signal is checked in the same manner as described above, and the process proceeds to the next branch line La. In this way, the m-1st branch line Lm l
Repeat steps 5 to 8 until m
Branch from step 6 starting at the th branch @, (L m.

That is, since a short-circuit fault has occurred in the m-th branch line Lm, when the m-th switching contact Sm is closed, a signal is generated in the fault detection means, and the process moves to step 9. In step 9, the once-closed switching contact Sm is opened again to restore the unusable state of the entire transmission line, and the process proceeds to the next step 10. In step 10,
Register that a failure has occurred on the m-th branch line Lm,
After displaying that fact as necessary, the process returns to step 7 and proceeds to the inspection check of the next branch line LoH-1. Then, all branch lines L1 to Ln are inspected, the broken branch line is disconnected and its branch line number is registered, and the last branch line Ln
After inspecting and checking, the process branches from step 8 and ends.

In the above embodiment, individual lines B1 to Bn extending from the solid device C are connected to the valley switch 8l-Jl,
However, as shown in the schematic configuration diagram of FIG. 3 shown as another embodiment, each switch AEII to n
A unique address is assigned to all switch AS1. -n can be selectively driven individually, the number of lines can be reduced and the construction of the entire device can be simplified.

In addition, as shown in Fig. 5, when lines 1 to n are laid adjacent to each other on a plurality of main lines, a transmission line AB dedicated to the switching device is provided as shown in the embodiment of Fig. 3. If the switching device AS is connected to another adjacent main line instead of the above, the construction of the entire device can be further simplified, and the entire device can be realized at low cost.

As described above, in the disaster prevention monitoring and regulation 1 device according to the present invention, switching means is provided at each connection portion between the main line and each branch line to individually select and connect the separation distance between the lines, and Since a detection means for detecting a failure in the transmission line is installed on the main line side of the transmission line, in the event of a failure, the location of the failure can be quickly detected so that restoration and repair can be started. When a failure occurs in a branch line, the failed branch line can be separated from the main line to prevent the entire transmission line from becoming unusable, thereby minimizing the portion that becomes unusable.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a disaster prevention monitoring and control device manufactured by Juto, FIG. 2 is a schematic configuration diagram of an embodiment of the disaster prevention monitoring and control device according to the present invention, and FIGS. 3 and 5 are FIG. 4, which is a schematic configuration diagram of another embodiment of the disaster prevention monitoring and control device according to the invention, is a flowchart used to explain the operation of the disaster prevention monitoring and control device according to the present invention. T...terminal device, L1-n...branch line, C...solid device, K-main line, Ell-rl, 8t-n switching device as switching means and its switching contact, D...failure Detection means patent applicant Nikkun Co., Ltd. Figure 2 Figure S Figure 4

Claims (1)

[Scope of Claims] ■) A plurality of terminal devices are appropriately grouped and connected to branch lines for each group, and the branch lines of each group are connected to a main line extending from the solid device to connect the solid device and the terminal device. form a transmission line between
In the disaster prevention monitoring and control device that transmits and receives signals via the transmission line, a switching means is provided at each connection between the main line and each branch line to individually select connection or disconnection of the lines, and A disaster prevention monitoring and control device characterized in that a detection means for detecting a failure in the transmission line is provided on the trunk side of the transmission line. 2) The disaster prevention monitoring and control device according to claim 1, wherein the switching means is selectively driven by a detection signal from the detection means.