JPS63299540A - Acoustic device equipped with warning broadcast switching function - Google Patents

Abstract

PURPOSE:To realize the broadcast as necessary even while the warning tones are ringing and also to reset a warning sounding mode even after the broadcast, by using a circuit which controls a switching means with use of the output of a warning signal preference logic signal that gives the higher priority to the warning signal than a broadcast control signal. CONSTITUTION:A speaker SP works when the warning signals A and B or a broadcast signal S are switched by a switching means 10 and supplied. A warning signal detecting circuit 11 detects both signals A and B; while a broadcast control signal detecting circuit 12 detects a broadcast control signal C which controls the signal S. A warning signal preference logic circuit 13 receives the input of those signals A, B and C and gives the priority to the input of the warning signals. Then a switch control circuit 14 controls a switching means 10 by the output given from the circuit 13. In such a constitution, the broadcast is possible as necessary even in a ringing state of a warning tone and also a warning sounding mode can be reset even after the broadcast.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an audio device with an alarm/broadcast switching function, and in particular, it is capable of broadcasting at any time even when the W alarm sound I+IS is in operation, and even after the broadcast ends. Install an audio device with an alarm/broadcast switching function that can return to sounding the alarm again.

[Technical background of the invention and its problems] Conventionally, this type of acoustic device with an alarm/broadcasting function has
As shown in Figure (a), the alarm audio device 40 and the broadcast audio device 41 are installed separately, and therefore the alarm speaker SPI and the broadcast speaker SP2 operate independently.

In addition, as shown in FIG. 5(b), one speaker SP
There is a method in which the alarm audio device 42 including the alarm amplifier AMP and the broadcasting device are switched by a relay Ry.

However, the 51st! In the configuration shown in I (a),
Even if a warning sound and a broadcast sound are sounded at the same time, the content of the broadcast sound is canceled out by the alarm sound, which reduces the meaning of the broadcast by half, and in order to obtain the effect of the broadcast, the alarm sound must be stopped. Must be.

In addition, in the configuration shown in Fig. 5(b), when the speaker is connected to the broadcasting side and is in a state where it cannot broadcast, when an alarm occurs, the relay is activated by the alarm control signal and the speaker is The device is switched to the vi-report side and an alarm sounds. Since broadcasting cannot be performed on a leapfrog where this alarm is sounding, its utilization value 11σ is halved. If you are forced to broadcast, you must first return the alarm to its inactive state before you can broadcast.

If such an operation is performed, there is a problem in that a re-warning cannot be issued when the broadcast ends (Fig. 6).

[Object of the Invention] The present invention has been made in order to solve the above-mentioned difficulties, and is to enable broadcasting at any time even when the 1y warning sound is sounding, and to return to the sounding of the warning sound even after the broadcast ends. The purpose of the present invention is to provide an audio device with an alarm/broadcast switching function that can perform the following functions.

[Summary of the Invention] In order to achieve the above object, the acoustic device with an alarm/broadcast switching function of the present invention includes a speaker that is sounded by switching and inputting an alarm signal or a broadcast signal by a switching means; an alarm signal detection circuit that detects an alarm signal; a broadcast control signal detection circuit that detects a broadcast control signal that controls the broadcast signal; and an alarm signal from the alarm signal detection circuit and broadcast control from the broadcast control signal detection circuit. An alarm signal priority logic circuit to which a signal is input and prioritizes the input of the alarm signal over the broadcast control signal, and a switching control circuit that controls the switching means based on an output from the alarm signal priority logic circuit. It is.

[Embodiments of the Invention] Preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the acoustic device with a double news/broadcast switching function of the present invention has a speaker SP which is sounded by switching and inputting alarm signals A, B or broadcast signal S through a relay switching contact lO, and an alarm signal A. , B, a broadcast control signal detection circuit 12 that detects an AC broadcast control signal C that controls the broadcast signal S, and a U alarm signal A, B from the alarm +8 signal detection circuit 11. and broadcasting fees
An alarm signal priority logic circuit 13 receives the broadcast control signal C from the I signal detection circuit and prioritizes the input of alarm signals A and B over the broadcast control signal C, and a relay switching contact is activated by the output from the alarm signal priority logic circuit 13. The switching control circuit 14 controls the switching control circuit 10. The switching control circuit 14 is a relay 15
controls the relay switching contact IO. The excavator 16 is triggered by alarm signals A and B from the alarm signal detection circuit 11, and the oscillation signal is sent to the amplifier 17 as an alarm sound signal W.
is applied to

To explain this alarm/broadcast switching in detail, as shown in FIG.
, IOc, and the alarm sound oscillation signal W from the oscillator 16
An amplifier 17 to which is applied is connected between a resistor R1, a capacitor C1, and a capacitor C2, and is connected to a relay switching contact 10.
When a is switched to the alarm side shown by the broken line, the amplifier 17 is connected to the speaker SP via the resistor R3. The terminals S[GA, 5IGB to which the broadcast signal S is applied are connected from the transformer T to the speaker SP via the resistor R3 when the relay switching contacts 10b, 10c are switched to the side shown by the solid line. In addition, terminal 5IGA%5IGB is relay switching contact 1
When 0b and 10c are switched to the side shown by the broken line, they are connected to a termination impedance consisting of capacitor C3, resistor R4, and capacitor C4.

Alarm signal detection circuit 11, broadcast control signal detection circuit 12, alarm signal priority logic circuit 13, and switching control circuit 1 shown in FIG.
4. A specific example of the relay 16 will be explained with reference to FIG.

This alarm signal detection circuit 11 takes in each signal from a fire sensor and a gas leak sensor (not shown) into a central processor unit (cp u>), and outputs the signals from its output terminal OU.
T! , 0UT2 are applied via transistors Tr+ and Tr2 to one-shot multivibrators OM V + and OM V 2 which are constructed by intervening CR series circuits of NOR circuits 20-21 and 22-23 and human output feedback. This output is applied to the NOR circuit 24. p and q are connected to a fire indicator light circuit and a gas leak indicator light circuit (not shown) for fire signal A and gas leak signal B, respectively.

The broadcast control signal detection circuit 12 has terminals C0NT and GND to which an AC broadcast control signal C for controlling the broadcast signal S is applied.
is connected to diode D1, resistor R5, and capacitor 05, and is connected to transistor Tr3 from between diode D1 and resistor R5 through diode D2 and resistor R6, and capacitor C8 is connected between diode D2 and resistor R6.
, a resistor R is connected between the resistor R6 and the base of the transistor Tr3.
7 are connected in parallel.

The collector of the transistor Tr3 is connected to Vcc through a resistor R8 and a resistor R9. It is connected to the base of the transistor Tr4 from between the resistor R8 and the resistor R9, and its collector is connected from the resistor RIG to the emitter of the transistor Tr3. The collector of the transistor Tr4 is a one-shot multivibrator OM constructed by intervening CR series circuits of NOR circuits 30-31 and input/output feedback.
Added to V s. This output is applied as the broadcast control signal C to the NAND circuit 25 together with the output of the NOR circuit 24.

The alarm signal priority logic circuit 13 includes a NAND circuit 26 to which the output from the NOR circuit 24 is applied, and an NNAND circuit 2.
and a NAND circuit "#j27" to which the output from 5 is applied, and constitutes a flip-flop FF constructed by feeding back the outputs of both of them to each other.

Is the first truth of this flip-flop FF a warning from a one-shot multivibrator? (2) Signals A and B, broadcast control signal C, and output from flip-flop FF are shown in Table 1 as parameters.

Margin Table 1 below: θ: Previous state output is applied from the Rth resistor to the base of the transistor Tr5, and a resistor RI2 is connected between the base and emitter of the transistor Tr5. The collector is connected to Vcc by a relay 15.

On the other hand, the resistor R8 is connected to the transistor T via the resistor RI4.
It is applied to the base of r6, whose base is grounded via resistor RI3, and whose collector is connected to relay 15.

In the acoustic device with alarm/broadcast switching VA function configured as described above, an AC broadcast control signal C (for example, 500Hz to 2KHz) is transmitted from a main controller in a management room of an apartment or a sub-controller (not shown) in a hallway. ,■
pp=6 to 20v) f is applied from the terminal C0NTSGND, the DC component is cut off by the capacitor C5, and then passed through the resistor R5 to the diode D1 and the diode D? , is rectified by capacitor C6, and is rectified by transistor T via resistor R6.
Becomes a bias source for r3. Transistor Tr3 is O
When N, the l transistor Tr4 is biased, and the one-shot multivibrator O of the control signal detection circuit 12 is biased.
Run MV3. Broadcast charge i+=C from One Shot Full 1 vibrator OMV3 is at II level, and to One Shot Multi at alarm signal detection port ffall - L level if there is no fire signal A or gas leak signal B from f Blender OMVI, OMV2 Therefore, the interposed JOR circuit 24
, the NAND circuit 25, and the flip-flop FF. i L roar, transistor Tr
5 is turned OFF, the relay 15 is not operated, and the relay switching contacts 10a-10b, 10c are on the broadcasting side (solid line in FIG. 2). In this state, broadcast signal S is connected to terminal 5TGA.
, 5IGB, broadcast sound is emitted from the speaker SP via the resistor R3 from the transformer T (Fig. 4(a)).
). In this way, the broadcasting side 1iillltf detection circuit 12 detects the broadcast control number 13C and controls the broadcast signal S to be emitted from the speaker SP.

In this broadcast state, a signal from at least one of the fire sensor and gas leak sensor (not shown) is taken into the central processor unit (CPU), and the output terminals 0UTI and 0UT2 are sent to the transistors Tr1 and Tr2.
One-shot multivibrator OM V of NOR circuit 20-21.22-23 through ! , OM V
Suppose that it is added to 2.

This output is applied to the NOR circuit 24, and the one-shot multivibrator OMVI, O of the alarm signal detection port Ill is applied.
When there is fire signal A and gas leak signal B from MV2, they are at H level, so according to the truth table of flip-flop FF, the output becomes H, transistor Tr5 turns ON, relay 15 operates, and the relay switching contact 10a, 1
0b and 10c are switched to alarm III (broken line in FIG. 2). Therefore, the oscillator 16 is connected to the alarm signal detection circuit 1.
triggered by the alarm signal A or B from 1, the oscillation signal is applied to the amplifier 17 as the υ alarm signal W,
An alarm sound is sounded from the speaker SP. In this way, the alarm signal detection circuit 11 detects the alarm signal At or B,
Emit an alarm sound from the speaker SP (Fig. 4(b)')
.

This police? If you want to broadcast in the 8-way vibration state, when you apply the AC broadcast control signal C from the terminals C0NT and GND again from the main controller or the sub-controller (not shown), the broadcast control signal C from the one-shot multivibrator OMV3 is applied. is at the ET level, and even if there is a fire signal A or a gas leak signal B, the output from the one-shot multivibrators OMV, OMV2 of the alarm signal detection circuit 11 will be L, so from the flip-prop FF truth table 11a above, As is clear, the output is D C,t L, and the transistor T
rs is OFF, the relay 15 is not operated, and the relay switching contacts 10a, 10b, and 10c are on the broadcasting side (solid lines in Figure 2).In this state, the broadcasting signal S is connected to the terminal 5IG.
If added to A, 5IGB, broadcast sound is emitted from the speaker SP via the resistor R3 from the transformer T (Figure 4, c).
)).

At this time, in order to stop broadcasting, an AC broadcast control signal C is input from the main controller or sub-controller (not shown) to terminal C0N.
When the application from T and GND is removed, the transistor Tr3 is turned off, the transistor Tr6 is biased from Vcc, the relay 15 is operated, and the relay switching contact l is turned off.

a, 10b, and 10c are switched to the alarm side (broken line in FIG. 2), and an alarm sound is emitted from the speaker SP (FIG. 4(d)').

That is, the fire signal A, gas leak signal B, and broadcast control signal C are all one-shot multivibrators OMV, OM
V2, output from OMV3, and NAN
As is clear from the truth table of the flip-flop FF, when the fire signal A and the gas leak signal B are present, the output of the flip-flop FF becomes H, and the fire signal is detected by the D circuit 25 and the flip-flop FF. When A and gas leak signal B are together and broadcast control signal C is H, the output is L.
This is a logic circuit that gives priority to the inputs of u' JIJ No. 48 A and B over the broadcast control signal C, which is As a result, even if the one-shot multivibrator outputs of the broadcast control signal C, the fire signal A, and the gas leak signal B are input at the same time, the output becomes H. If the output is
switch to the alarm sound side. When the output reaches L, the transistor Tr5 is turned off, but if the broadcast control signal C is not present at this time, the transistor Tr6 is turned on, the relay 15 is operated, and the speaker SP is switched to the alarm sound side. Therefore, the relay 15 turns OFF when both the transistor Tr5 and the transistor Tr6 are OFF, the broadcast control signal C exists, and then the fire signal A,
This is only when the gas leak signal B is not received, and in this case, the speaker SP is switched to the broadcasting side.

Table 2 shows the status of the above device, the operation of the relay 15, and the status of the speaker SP.

In the above example, a flip-flop was used as the alarm signal priority logic circuit, but any other logic circuit can equally be used as long as it has the ability to prioritize the input of the alarm signal over the broadcast control signal.

Further, in the above example, a relay and a relay switching contact were used as the switching means and the switching control circuit that controls the switching means, but solid-state devices can also be used.As is clear from the above embodiments, the alarm of the present invention - According to the audio device with a broadcast switching function, a speaker is sounded by switching and inputting an alarm signal or a broadcast signal by a switching means, an alarm No. 18 detection circuit that detects the alarm signal, and a control circuit for controlling the broadcast signal. a broadcast control signal detection circuit that detects a broadcast control signal to be transmitted; and an alarm signal from the alarm signal detection circuit and a broadcast control signal from the broadcast control signal detection circuit are input, and the input of the alarm signal is detected more than the broadcast control signal. By providing a U-report signal priority logic circuit that gives priority and a switching control circuit that controls the switching means based on the output of the VI-report signal priority logic circuit, it is possible to broadcast at any time even when the 11 alarm tone is sounding. In addition, even after the broadcast ends, the alarm sound can be returned to sounding again.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram of an audio device with a double alarm/broadcast switching function according to an embodiment of the present invention, FIG. 21T4 is a circuit diagram of the alarm/broadcast switching section of FIG. 1, and FIG. Fig. 4 is a partial detailed circuit diagram of the sound device with alarm/broadcast switching function, Fig. 4 is a timing chart of the alarm/broadcast switch 1a' machine r1si 1-inch sound device, and Figs. 5(a) and (b) are FIG. 6 is a block diagram of a conventional alarm/broadcast sound device and a timing chart of the sound device. A, B...Alarm signal C...Broadcast control signal S...Broadcast signal SP...Speaker 10 (10a, 10b, 10c) --LfJ Converting means 11... U-information signal detection circuit 12... Broadcast control signal detection circuit 13 (FF).
...IY signal priority logic circuit 14...Switching control circuit agent Patent attorney Moritani -O! Engraving (no change in content) Figure 5 40〒11〒11〒11 41Gogudoko (!ralso1 Figure 6 Procedure amendment (JJ style) 1. Case indication patent application No. 134605 1988 2 , Name of the invention Sound device with alarm/broadcast switching function 3, Relationship with the case of the person making the amendment Patent applicant 6, Engraving of drawings 5 and 6 to be amended (no change in content) 7, Amendment As per attached sheet

Claims (1)

[Claims] A speaker that sounds when an alarm signal or a broadcast signal is switched and inputted by a switching means, an alarm signal detection circuit that detects the alarm signal, and a broadcast control signal detection circuit that detects a broadcast control signal that controls the broadcast signal. an alarm signal priority logic circuit to which an alarm signal from the alarm signal detection circuit and a broadcast control signal from the broadcast control signal detection circuit are input, and which prioritizes input of the alarm signal over the broadcast control signal; An acoustic device with an alarm/broadcast switching function, comprising a switching control circuit that controls the switching means based on an output from a priority logic circuit.