JPH0217838B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fire alarm system that transfers data between a receiver and a repeater.

[Background technology]

Figure 3 shows the overall configuration of this type of fire alarm system, in which the receiver 1 and each repeater 2 are connected to the transmission line 3.
The receiver 1 constitutes a time division multiplex transmission system in which the receiver 1 sequentially calls each repeater 2 and transfers data from the repeater 2. The repeater 2 is connected to a general fire detector 5 and an analog sensor 6 for detecting smoke concentration via a line 4.
data and the output data of the analog sensor 6. The repeater 2 then transfers this captured data to the receiver 1.

By the way, in the conventional system, the output data of the analog sensor 6 is transferred each time in response to the sequential calls of the receiver 1, which requires a huge amount of memory on the receiver 1 side, and also requires software to perform the processing. It was also becoming more complicated. In particular, as the number of analog sensors 6 increases, this tendency accelerates.
There was a limit to the number of

The analog sensor 6 consists of a base part 6a and a head part 6b, and the smoke concentration detected by the head part 6b, for example, is converted by a signal converter provided in the base part 6a, and is converted according to the access from the repeater 2. It is designed to be transferred to repeater 2.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems, and its purpose is to be able to display and record changes in the output data of an analog sensor on the receiver side, and to have a large capacity on the receiver side. An object of the present invention is to provide a self-fire alarm system that does not require additional memory and can greatly simplify receiver software.

[Disclosure of the invention]

Embodiment FIG. 1 shows an embodiment circuit of a repeater 2 which is an important element of the present invention.
and an interface section 8 for taking in the output data of each analog sensor 6.
A function to sequentially access and transfer output data to the repeater 2, and to import and judge the monitoring data of the general sensor monitoring unit 7, and to make a judgment on the imported analog sensor 6.
A function to compare the output data of the receiver 1 with a set level, a control function to write and read the output data in the memory 9, and a control function to take in the transmission signal from the receiver 1 via the interface section 10 and read the data of the transmission signal. It is equipped with a transmission processing unit 11 having a function of determining the content and transmitting the output data of the analog sensor 6 stored in the memory 9 and the monitoring data of the general sensor 5 in response to a request from the receiver 1. It is something. The connections between the repeater 2 configured in this way, the analog sensor 6, and the general sensor 5 are the same as in the circuit of FIG. 3.

Next, the processing operation of the output data of the analog sensor 6 of the repeater 2 will be explained based on the flowchart shown in FIG.

First, the repeater 2 calls the connected analog sensor 6 and inputs its output to the transmission processing section 11 . The transmission processing section 11 compares the output level with a preset setting level that is an accumulation start level, and if the output level exceeds the setting level, the transmission processing section 11 stores the output level in the memory 9.
At the same time as issuing a write command to the analog sensor 6
It is determined whether there is enough room for writing in the capacity of the area allocated to the memory 9, and if the capacity is not exceeded, the write process to the memory 9 is performed. If the capacity is over, it is determined whether there is any remaining capacity in the memory area allocated to another analog sensor 6, and if so, the remaining area is used as the memory area for the analog sensor 6.
memory area. If there is no remaining area, the first accumulated output data in the memory area of the analog sensor 6 is erased. In this way, the output data is written to a modified memory area or to a memory area obtained by erasing the data.

When the above writing process is completed, output data is transferred from the next analog sensor 6 and similar processing is performed. Of course, if the output is below the above-mentioned setting level, it will not be stored in the memory 9, and the process will immediately proceed to the next analog sensor 6.

Now, if you want to transfer the output data of each analog sensor 6 stored in the memory 9 of the repeater 2 to the receiver 1 side, send the address data and transfer request command of the analog sensor 6 you want to transfer from the receiver 1 to the repeater 2.
to be transmitted. Transmission processing unit 1 of called repeater 2
1 determines the content of the transmission signal, reads the output data of a predetermined analog sensor 6 from the memory 9, converts it into a predetermined signal format, and transmits it to the receiver 1. The receiver 1 can confirm changes in the output data of the analog sensor 6, and can also display and record the changes. In this case, the receiver 1 only needs a memory to temporarily store the transferred output data of the analog sensor 6, and the processing software is only responsible for transmitting the transfer request command and receiving the transferred output data. , and can be greatly simplified. Furthermore, the data stored in the memory 9 can be erased simply by instructing the transmission processing section 11 of the repeater 2 from the receiver 1 side.

〔Effect of the invention〕

Since the present invention is configured as described above, the output data of the analog sensor is automatically accumulated by the repeater,
It is capable of continuously transmitting accumulated data in response to requests from the receiver, and allows the receiver to display and record changes in data from analog sensors.Moreover, since data is accumulated on a repeater basis, the receiver This has the advantage of not requiring a large capacity memory on the side, and can store data from a large number of analog sensors.Furthermore, since the receiver side only needs to request data transfer to the repeater, the receiver side This simplifies the processing software, and also allows the receiver to record maintenance, etc., and to confirm abnormalities at the forecast level.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram of a repeater according to an embodiment of the present invention, Fig. 2 is a flowchart of the same operation explanatory diagram, and Fig. 3 is a basic system configuration diagram.
is the receiver, 2 is the repeater, 3 is the transmission line, 4 is the line,
6 is an analog sensor, 9 is a memory, and 11 is a transmission processing section.

Claims (1)

[Claims] 1 Consists of a receiver, a repeater connected to this receiver via a transmission line, and a plurality of analog sensors connected to the repeater, and the repeater sequentially receives the output of each connected analog sensor. A means for monitoring and detecting that the set level has been exceeded, a memory for sequentially storing the output data of the analog sensors exceeding the set level in respective allocated areas, and a means for monitoring and detecting that the set level has been exceeded; 1. A self-fire alarm system comprising means for continuously transmitting accumulated data to a receiver.