JPS60716Y2 - fire receiving device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a receiving device for fire alarm equipment such as high-rise buildings, which have a large number of fire warning areas.

Conventionally, fire signals sent from each fire warning district via a dedicated line were detected by district relays, and the operation of each of these district relays was indicated by district indicator lights each having its own display window.

For this reason, fire receivers that have a large number of area display windows, such as fire receivers for high-rise buildings, have large fire receivers. It had one or two windows and was very uneconomical.

This invention miniaturizes the receiving device by numerically displaying such fire indications.As an example of this, a receiving device that displays numerically the operation of the first two lines is This will be explained in detail based on the block diagram shown in FIG. 1 and the circuit diagram shown in FIG.

In Fig. 1, fire signals sent from each warning area via dedicated lines are input to district relays (not shown), and the output terminals (N1 to Nn) of these district relays are connected to OR gates OR, The signals are respectively input to the scanning circuit S1 and the step holding circuit H.

First, the fire signal drives the clock pulse generator CPG via the OR gate OR.

The clock pulses output from the clock pulse generator CPG are counted by a counting circuit, and the counting signal (for example, a binary W-adic code) is input to the scanning circuit S.

On the other hand, signals from the output terminals N1 to Nn are input to the scanning circuit S.

The scanning circuit S scans based on the counting signal from the counting circuit K, and when there is a fire signal at the scanned output terminals N1 to Nn, the counting signal at this time is sent to the first gate circuit AG1. Output to AG2.

Furthermore, the signals from the output terminals N□ to Nn are transferred to the step hold circuit H.
and the first gate circuit AG, second gate circuit BG, depending on the number of input fire signals.

Sequentially output to BG2.

That is, when the number of fire signal inputs is one, the control signal is output to the first gate circuit AG□, and when the number of fire signal inputs is two, the control signal is output to the second gate circuit BG,
If the number of fire signal inputs is 3 or more, the second gate circuit B
Outputs a control signal to G2.

The first gate circuit AG is controlled by the control signal of the step hold circuit H.
1 operates, and the count signal from the scanning circuit S is stored in the storage circuit M1.
input.

The storage circuit M1 stores the count signal and outputs the stored count signal to the numeric display DP1 and the storage circuit M2, and a storage completion signal is output to the second gate circuit BG.

When the signal from the step hold circuit H and the storage completion signal are input to the second gate circuit BG1, the first gate circuit AG
A control signal is output to 2.

The first gate circuit AG2 inputs the count signal of the scanning circuit S to the memory circuit M2 using this control signal.

The memory circuit M2 compares the count signal with the count signal stored in the memory circuit M, and if they match, it does not perform a memory operation.

If there is a discrepancy, this count signal is memorized and displayed on the numeric display D.
P2 and sends the storage completion signal to the second gate circuit BG2.
Output to.

Numerical display DP4. DP2 immediately performs display based on the count signal stored in memory circuit M09M2.

When the signal from the step hold circuit H and the storage completion signal are input to the second gate circuit BG2 (operation of three or more lines), an overflow signal is output and the display lamp L is driven.

In the fire receiving apparatus having the above configuration, the operation will be described in the case where, for example, a fire signal is applied to the second output terminal N2 of the district relay.

First, the clock pulse generator CPG is driven by the fire signal input to the OR gate OR to generate clock pulses, which are converted into counts by the counting circuit K and applied to the scanning circuit S.

In the scanning circuit S, the output terminals N1 to Nn of the district relays are sequentially scanned from the N1 side using the counted signals, and when the output terminal N2 having the second fire signal is scanned, the count corresponding to the number 2 is immediately obtained. The signal is sent to the gate circuit AG,
will be sent to.

At this time, the first gate circuit AG1 is also transferred from the step hold circuit H.
A signal has already been applied to , therefore this counting signal is stored in the first memory circuit M□ and the first numeric display D
The number 2 is displayed on P1.

Incidentally, the scanning by the scanning circuit S is further continued, and re-scanning is repeated even after the first cycle, in order to prepare for the arrival of fire signals from other warning areas.

Therefore, when a second fire signal arrives from another district relay at this time, it is similarly scanned by the scanning circuit S, and its count signal is stored in the second storage circuit M2 by the step holding circuit H. It is displayed on the second numeric display DP2.

At this time, the stored contents of the memory circuit M are compared, and if they are the same, no storage is performed.

In other words, the same display operation as the first report is prevented.

Thereafter, the arrival of the third and fourth fire signals due to the spread of the fire is indicated by the indicator lamp L.

Also, for simultaneous operation of two or more lines, the scanning circuit H performs sequential scanning and sends out counting outputs, and after confirming the memory of this first signal, it sequentially sends signals to the next memory circuit M or indicator light. is sent.

Next, FIG. 2 shows an example of a specific circuit diagram of the counting circuit and scanning circuit S shown in FIG. 1, and will be described.

To simplify the explanation, there are only 10 dedicated lines.

The counting circuit is a general binary counter.

The scanning circuit S includes a decoder (1), a plurality of two-man power AND circuits, a multi-input OR circuit ORC, and a gate circuit G.
It is composed of T.

When a fire signal arrives, a clock pulse is input to the counting circuit K, and this output Q, -Q3 has a BC that changes sequentially.
A count signal of D (binary W-adic code) is output.

This count signal is input to the decoder (1) of the scanning circuit S and the gate circuit GT.

Decoder DO outputs B in response to the count signals input to inputs A0 to A3.

- 71J for one of B9. For example, if the count signal is '
If ooooJ, output B.

Make rIJ.

Also, the count signal is ' 0001 J (Q3 = Ov
Q2=0, Q1=0. Qo=t), the output B0 is set to 71J.

Therefore, rIJ signals are sequentially output B. The signals output to output terminals N1 to N1o, which are output to ~a, are normally 1.
0yo, if the fire signal rIJ, then some output terminal N~
When there is a fire signal 71J at N1o, the output of the AND circuit AND connected to it is the output Bb of the decoder (1) input to this AND circuit AND - when the bird becomes r1yo, it becomes rIJ and the rear circuit Gate circuit G via ORC
T is controlled, and the count signal at this time is sent to the first gate circuit AG.
1. Output to AG2.

In this way, the numbers of the output terminals N1 to N1o where the fire signal is present can be indicated by the count signal output by the scanning circuit S, and can also be easily displayed numerically based on this count signal.

In the embodiment described above, the operations of the first two lines are displayed, but the gate circuits AG1 to AG2.
BG□~BG2, memory circuit M□~M2, display DP1~
By adding DP2, it is possible to display three or more lines.

As described above, the fire receiving device of this invention has a significantly simplified display surface, and can be made compact and inexpensive to manufacture for receiving devices that have a large number of fire warning areas, such as those in high-rise buildings. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the fire receiving device according to this invention, and FIG. 2 is a circuit diagram showing an embodiment of the counting circuit and scanning circuit S of FIG. 1. OR...OR gate, CPG...clock pulse generator, K...counting circuit, S...
...Scanning circuit, H...Step holding circuit, AGl
, AC3...first gate circuit, BGl, BG
2...Second gate circuit, M39M2...
...Memory circuit, DPl, DP2...Numeric display, L...Display lamp, DO...Decoder, AND...AND circuit, ORC...・・・
...OR circuit, GT...gate circuit.

Claims (1)

[Scope of utility model registration request] A counting circuit that starts a counting operation upon arrival of the fire signal in a fire receiving device in which a fire signal from a fire detector is transmitted through a dedicated line provided for each district;
A scanning circuit that sequentially scans fire signals from the dedicated line by the output of the counting circuit and outputs a counting signal corresponding to the dedicated line when a fire signal is detected; a step holding circuit that outputs a signal; one or more storage circuits that store the counting signal of the scanning circuit based on the output of the step holding circuit; It is equipped with a numeric indicator that numerically displays the operating area based on the counting signal, and an indicator lamp that indicates the arrival of the fire signal in a number equal to or greater than the number of the numeric indicator based on the output of the step holding circuit. A distinctive fire signal device.