JP2017004451A - Fire receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable workability to be improved by reducing noise due to acoustic output of a receiver in construction or maintenance inspection.SOLUTION: When an alarm sound signal for fire, troubles, etc. is output from a sound source part 46, in a maintenance construction mode, a control unit 20 of a fire receiver causes a loudspeaker 52 to output alarm sound by controlling the gain of an amplifier 50 so that the alarm sound signal is a first sound pressure level of 85 dB or higher while, when a non-alarm sound signal such as emergency phone calling and voice guidance is output from the sound source part 46, causes the loudspeaker 52 to output non-alarm sound by controlling the gain of the amplifier 50 so that the non-alarm sound signal is a second sound pressure level of about 40-50 dB lower than the first sound pressure level.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fire receiver that receives a fire signal from a fire detector installed in a warning area and gives an alarm.

  Conventionally, in the case of a P-type fire receiver provided in a fire alarm facility, a transmitter and a fire detector are connected to the line drawn from the fire receiver, and the fire is monitored on a line basis. In the event of a fire, warnings are given to building personnel such as managers by sound and indicator lights.

  In addition, if the sound stop button is operated in response to the fire alarm of the fire receiver and then the voice guidance button is operated, the fire determination button is operated if there is a fire after confirming the site by voice guidance, and if the fire is not fire, the local sound An operation procedure such as operating the pause button is notified.

  Also, the fire receiver has a telephone jack, which outputs a ringing tone when there is a call connection of an emergency telephone slave unit when a site check is performed in response to a fire alarm, for example, it is stored behind the receiver door You can make a phone call by taking out the emergency telephone and inserting it into the telephone jack.

  Also, when a fire receiver detects a failure such as a sensor disconnection, blown fuse, or broken wire, a failure alarm sound is output.

  Further, when various setting registration operations are performed on the fire receiver in construction of the fire alarm facility, for example, a predetermined operation sound is output in accordance with a switch operation for setting a registration mode.

  On the other hand, in the case of fire alarm equipment, periodic inspections are performed when the equipment is installed or in operation, and a sensor test is performed in which the fire detector is actually operated using a test jig.

  The sensor test is performed by two inspectors, one at the receiver and one at the sensor. The inspector on the sensor side uses a test jig provided with a test head at the tip of the support pole, and attaches the test head from the bottom so as to cover the smoke detector, for example, and smoke flows from the test head in this state. The smoke detector is operated, or the smoke detector is simulated by an operation such as a reed switch using a magnet. In this case, the inspector connects the emergency telephone handset to the telephone jack of the transmitter installed at the site, calls the receiver side, and the inspector of the receiver who receives the call connects to the fire receiver. Using the emergency telephone master unit, the test work is proceeding while notifying the presence or absence of fire reception during the fire detector operation test.

JP 05-151478 A Japanese Patent Application Laid-Open No. 2002-026744

  By the way, it is legally established that a fire alarm sound output from a fire receiver has a sound pressure level of 85 decibels or higher, and other sounds such as a failure alarm sound and an emergency telephone ringing sound have a sound pressure level of 70 decibels or higher. This makes it possible to reliably notify the manager and staff of the fire alarm.

  However, when constructing a fire alarm facility or conducting a sensor test during regular inspection during operation, the staff will proceed with the emergency telephone between the fire receiver and the test site. Fire receivers frequently output an emergency telephone ringing sound with a volume of 70 dB or more, the emergency telephone ringing sound is very loud, hinders work around the fire receiver during construction, and noise There is a risk of annoying others.

  Such a problem also occurs in voice guidance and switch operation sound in construction and periodic inspection.

  An object of this invention is to provide the fire receiver which can improve the workability | operativity by reducing the noise by the acoustic output in construction and maintenance inspection.

(Fire receiver)
The present invention relates to a fire receiver that receives a fire signal from a fire detector installed in a warning area and gives an alarm,
A sound source unit for outputting an alarm sound signal and a non-alarm sound signal;
An amplifying unit capable of controlling the sound pressure level output from the speaker by amplifying the alarm sound signal and the non-alarm sound signal output from the sound source unit;
In the first mode, the amplifying unit is controlled so that the speaker output of the alarm sound signal and the non-alarm sound signal has a predetermined first sound pressure level. In the second mode, the speaker output of the alarm sound signal is the first sound pressure. A control unit for controlling the amplification unit so that the speaker output of the non-alarm sound signal becomes a predetermined second sound pressure level lower than the first sound pressure level,
Is provided.

(Gain control)
The amplifier can control the gain,
The control unit changes the sound pressure level of the alarm sound signal and the non-alarm sound signal by controlling the gain of the amplification unit.

(Attenuation control)
The amplifier can control the attenuation of the input audio signal,
The control unit changes the sound pressure level of the alarm sound signal and the non-alarm sound signal by controlling the attenuation amount of the amplification unit.

(Alarm sound signal and non-alarm sound signal)
The alarm sound signal output from the sound source unit includes a fire alarm signal or a failure alarm signal, and the non-alarm sound signal output from the sound source unit includes an emergency call ringing signal, a voice guidance signal, or a switch operation sound signal.

(Sound pressure level)
The first sound pressure level is 70 decibels or higher (70 dB or higher), and the second sound pressure level is 40 decibels to 50 decibels (40 dB to 50 dB).

(Basic effect)
The present invention relates to a fire receiver that receives a fire signal from a fire detector installed in a warning area and gives an alarm, and a sound source unit that outputs a warning sound signal and a non-alarm sound signal, and a sound source unit that outputs the sound signal. An amplifying unit capable of controlling a sound pressure level that amplifies an alarm sound signal and a non-alarm sound signal and outputs it from the speaker; and in the first mode, the speaker output of the alarm sound signal and the non-alarm sound signal has a predetermined first sound pressure. In the second mode, the amplification unit is controlled so that the speaker output of the alarm sound signal becomes the first sound pressure level, and the speaker output of the non-alarm sound signal is the first sound. Since the control unit that controls the amplification unit is set so that the predetermined second sound pressure level is lower than the pressure level, contact is made by emergency telephone, for example, in the construction or maintenance check of the fire alarm equipment corresponding to the second mode. Advance sensor test while taking In such a case, the emergency telephone ringing sound from the fire receiver is lowered to a second sound pressure level lower than the first sound pressure level of the normal alarm sound. Even if the ringing tone is output, it does not feel noisy, the work around the fire receiver associated with the construction is not hindered, and noise does not disturb the surroundings.

(Effect by gain control)
Further, the amplifier can control the gain, and the control unit controls the gain of the amplification unit because the sound pressure level of the warning sound signal and the non-alarm sound signal is changed by controlling the gain of the amplification unit. Thus, the alarm sound is set to a sufficient volume according to the first sound pressure level, and the non-alarm sound is set to the second sound pressure level in comparison with the first sound pressure level, so that the noise problem can be solved.

(Effects of attenuation control)
In addition, the amplifier can control the attenuation amount of the input audio signal, and the control unit changes the sound pressure level of the alarm sound signal and the non-alarm sound signal by controlling the attenuation amount of the amplification unit. By controlling the amount of attenuation of the audio signal input to the amplifying unit, the alarm sound has a sufficient volume according to the first sound pressure level, and the non-alarm sound has a second sound pressure level compared to the first sound pressure level. Can be resolved.

(Effects of warning and non-alarm signals)
In addition, the alarm sound signal output from the sound source unit includes a fire alarm signal or a failure alarm signal, and the non-alarm sound signal output from the sound source unit includes an emergency telephone ringing signal, a voice guidance signal, or a switch operation sound signal. During construction or maintenance inspection corresponding to the second mode, the sound pressure level of the emergency telephone ringing tone, voice guidance, and switch operation sound can be reduced to eliminate the noise problem. However, the alarm function by the alarm sound is not impaired by maintaining a sufficient sound pressure level for the fire alarm sound and the trouble alarm sound.

(Effects of sound pressure level)
In addition, since the first sound pressure level is set to 70 decibels or higher and the second sound pressure level is set to 40 decibels to 50 decibels, the alarm sound is legal in both the normal monitoring state and the construction / construction maintenance state. Ensuring sufficient sound pressure of 70 decibels or higher, while non-alarm sounds are low sound pressure in the range of 40 decibels to 50 decibels, so that the parties can fully hear and The noise problem can be solved reliably.

Explanatory drawing which showed the outline of the fire alarm equipment provided with the fire receiver which can control the speaker sound pressure level by this invention The block diagram which showed other embodiment of the fire receiver which controls the attenuation amount of the audio | voice signal input into an amplifier part

[Overview of fire alarm equipment]
FIG. 1 is an explanatory view showing an outline of a fire alarm facility equipped with a fire receiver capable of controlling the sound pressure level of a speaker according to the present invention. A fire receiver known as a P type for monitoring a fire on a line basis is shown. Take the example.

  As shown in FIG. 1, a fire receiver L installed in a management room of a building or the like draws a fire line L, a common line C, and a telephone line T toward a warning area in the building. L and common line C constitute fire alarm line 12a, and telephone line T and common line C constitute telephone line 12b.

  A fire detector 14 installed for each predetermined sensing area in the alert area is connected to the fire alarm line 12a drawn from the fire receiver 10. The fire sensor 14 is a smoke sensor that detects smoke associated with a fire or a heat sensor that detects heat associated with a fire. When the fire detector 14 operates by detecting a fire from the smoke concentration or temperature detection signal (this is referred to as “reporting” or “reporting operation”), a fire is caused by flowing a reporting current through the reporting line 12a. A signal is transmitted to the fire receiver 10 to output a fire alarm.

  When the fire receiver 10 receives the fire signal transmitted from the fire detector 14 via the fire report line 12a, the fire receiver 10 outputs a fire alarm such as a main acoustic alarm, a district acoustic alarm, a representative fire display, and a district fire display. In addition, the fire receiver 10 has a voice alarm function, and outputs a predetermined voice message indicating a line alert when a fire signal is received.

  A transmitter 16 is connected to the fire alarm line 12 a drawn from the fire receiver 10. The transmitter 16 is installed in a common area such as a corridor wall surface when the fire detector 14 is installed in each warning area where a plurality of fire detectors 14 are installed, for example, in each room. The transmitter 16 is provided with a transmitter button 16a covered with a protective plate. When the switch is turned on by this push-in operation, a fire alarm signal is sent to the fire receiver 10 by sending a fire alarm current to the fire alarm line 12a. An alarm is output.

  A telephone jack 18 that functions as a telephone connection terminal is provided in a freely openable / closable cover door provided in the transmitter 16, and the telephone jack 18 is connected to a telephone line 12 b from the fire receiver 10. By connecting the plug 38 of the emergency telephone 36 carried by the tester to the telephone jack 18 provided in the transmitter 16, a call with the emergency telephone 40 having the plug 42 inserted into the telephone jack 34 on the fire receiver 10 side is performed. Connection is possible.

  Here, the transmitter 16 is connected to the fire alarm line 12a drawn from the fire receiver 10 for each warning area, but the telephone line 12b drawn from the fire receiver 10 is a common line in all the warning areas. Therefore, the telephone jacks 18 provided in the plurality of transmitters 16 are commonly connected to the same telephone line 12b. Note that the telephone line 12b ensures the transmission quality of an audio signal in the audio frequency band 300 to 3400H of the audible band.

[Fire receiver]
(Outline of fire receiver)
As shown in FIG. 1, the fire receiver 10 includes a control unit 20, and the control unit 20 includes a CPU, a memory, and a computer circuit including various input / output ports. For the control unit 20, a line reception unit 22, a display unit 24, an operation unit 26, a transfer unit 28, a voice alarm unit 30, and a call circuit unit 32 are provided.

  The line receiving unit 22 detects a reporting current that is generated by a fire detection operation of the fire detector 14 or a push button operation of the transmitter 16 and outputs a fire signal to the control unit 20. The fire detector 14 continues the alarm operation when detecting a fire based on the smoke concentration and temperature, and stops the alarm operation when the fire state based on the smoke concentration and temperature is resolved. For this reason, the line receiver 22 outputs a fire signal while the fire detector 14 detects a fire and performs a notification operation, and outputs a fire signal when the fire detection operation of the fire detector 14 stops. To stop.

  The display unit 24 includes various indicator lamps and indicators provided on the front panel of the receiver or in the panel. For example, the display unit 24 is provided with a fire representative lamp, a district indicator lamp, a telephone lamp, a district acoustic pause lamp, a main acoustic stop lamp, and the like.

  The operation unit 26 includes various operation switches provided on the front panel of the receiver or in the panel. For example, the operation unit 26 is provided with a district sound temporary stop switch, a main sound stop switch, a switch for setting a maintenance operation mode (second mode), and the like. The transfer unit 28 is provided with a transfer circuit using a non-voltage relay contact that outputs a fire representative transfer signal or a line transfer signal to an externally connected display panel, for example.

  The audio alarm unit 30 is provided with an amplifying unit 50 and a speaker 52 that can be gain-controlled by an external signal. The amplifying unit 50 amplifies an audio signal from the audio output port 48 provided in the control unit 20 to the speaker 52. By outputting, a fire alarm sound, a failure alarm sound or the like is output from the speaker 52 as an alarm sound, and an emergency call ringing sound, a guidance sound, a switch operation sound or the like is output from the speaker 52 as a non-alarm sound.

  The call circuit unit 32 has capacitors C1 and C2 connected in series to the telephone line T of the telephone line 12b, and the connection point of the capacitors C1 and C2 is connected to a telephone jack 34 provided in the fire receiver 10. Further, a power supply voltage Vc of, for example, 24 VDC is applied to the telephone line T via a resistor R3, and the divided voltage of a voltage dividing circuit in which resistors R1 and R2 are connected in series is used as a call connection detection signal to the control unit 20. Output.

  When the plug 38 of the emergency telephone 36 is inserted and connected to the telephone jack 18 of the transmitter 16, current flows from the resistor R3 to the telephone line T, the emergency telephone of the telephone jack 18 and the common line C, and is divided by the resistors R1 and R2. The pressed call connection detection signal (voltage signal) falls below a predetermined value, and this is detected by the control unit 20 to turn on the telephone lamp and output a ringing tone, to another telephone jack 34 of the fire receiver 10. By inserting and connecting the flag 42 of the emergency telephone 40, a call can be made with the emergency telephone 36 on the transmitter 16 side.

(Sound pressure control of fire receiver)
The control unit 20 of the fire receiver 10 is provided with a function of a sound source unit 46 that outputs an alarm sound signal or a non-alarm sound signal. The sound source unit 46 is, for example, a voice ROM, and stores fire alarm sound data and failure alarm sound data as alarm sound data in advance, and emergency call ring data, guidance voice data, and switch operation sound data as non-alarm sound data in advance. I remember it.

  In the normal monitoring mode (first mode), the control unit 20 sets the first gain G1 in the amplification unit 50, and the speaker output of the alarm sound and the non-alarm sound is a predetermined first sound pressure level of 85 decibels or higher. Control to be.

  In the state where the maintenance operation mode (second mode) is set by operating the operation unit 26, the control unit 20 sets the first gain G1 in the amplification unit 50 and outputs the alarm sound when outputting the alarm sound. Is controlled so that the speaker output becomes 85 dB or more which is the first sound pressure level.

  In addition, when the control unit 20 outputs a non-alarm sound in a state where the maintenance operation mode is set by the operation of the operation unit 26, the control unit 20 sets a predetermined second gain G2 smaller than the first gain G1 in the amplification unit 50. Thus, control is performed so that the speaker output of the alarm sound is a low sound pressure within a range of, for example, 40 decibels to 50 decibels which is the second sound pressure level.

  For this reason, in construction of fire alarm equipment and periodic inspection, a maintenance construction mode is set in the fire receiver 10, and an inspector calls the emergency telephone 36 to the telephone jack 18 of the transmitter 16, for example, along with the alarm test of the fire detector 14. When the call circuit unit 32 detects that the plug 38 is inserted and connected, the control unit 20 outputs a gain control signal to the amplification unit 50 of the voice alarm unit 30 to set the second gain G2, and is output from the sound source unit 46. The emergency telephone ringing tone data is converted into an analog voice signal by the D / A conversion port 48, amplified by the amplifying unit 50 with the second gain G2, and is emergency with a low sound pressure within the range of 40 dB to 50 dB from the speaker 52. A telephone ring tone is output.

  For this reason, during construction and periodic inspection, the emergency telephone ringing sound from the fire receiver 10 is 40 dB to 50 dB, which is sufficiently lower than the normal sound level of the first sound pressure level of 85 dB or higher. Decreasing to the second sound pressure level of about decibel, even if the emergency telephone ringing sound is frequently output from the fire receiver 10, it does not feel noisy, without disturbing the work around the fire receiver accompanying construction, In addition, the noise does not disturb the surroundings.

  The control of the control unit 20 that lowers the sound pressure from the speaker to a second sound pressure level of about 40 decibels to 50 decibels is performed by the guidance sound by the voice guidance function of the fire receiver 10 in the state where the maintenance construction mode is set. The same applies to the switch operation sound of the operation unit 26.

  On the other hand, even if the maintenance construction mode is set in the fire receiver 10, if a fire signal is received from the fire detector 14 or the transmitter 16, the control unit 20 gains gain to the amplification unit 50 of the sound alarm unit 30. The control signal is output to set the first gain G1, and the analog sound signal obtained by converting the alarm sound data output from the sound source unit 46 at the D / A conversion port 48 is amplified by the amplification unit 50 with the first gain G1. The alarm sound is output from the speaker 52 with a sound pressure of 85 decibels or more so that the occurrence of a fire or failure is surely notified even in the maintenance construction mode.

[Sound pressure control by attenuation]
FIG. 2 is a block diagram showing another embodiment of a fire receiver that controls the attenuation of an audio signal input to the amplifier.

  As shown in FIG. 2, the sound alarm unit 30 of the present embodiment provided for the control unit 20 of the fire receiver is provided with an amplifying unit 50 and a speaker 52 set with a fixed gain, and D / A conversion for the amplifying unit 50 is performed. An attenuator (attenuator) 60 using a resistor is inserted and connected to the input line of the audio signal from the port 48, a switch unit 62 is connected in parallel with the attenuator 60, and can be turned on and off by a control signal from the control unit 20. Yes. Other configurations and functions are the same as those in the embodiment of FIG.

  In the normal monitoring mode, the control unit 20 turns on the switch unit 62 to bypass the attenuator 60 and attenuates the alarm sound signal and the non-alarm sound signal output from the D / A conversion port 48 of the control unit 20. Instead, the signal is directly input to the amplifying unit 50 and amplified with a fixed gain, so that the speaker output is controlled to be equal to or higher than 85 dB, which is the first sound pressure level.

  In the state where the maintenance construction mode is set by the operation of the operation unit 26, the control unit 20 turns on the switch unit 62 to bypass the attenuator 60 and outputs the alarm sound. Without being attenuated, the alarm sound signal and the non-alarm sound signal output from the D / A conversion port 48 are directly input to the amplifying unit 50 and amplified with a fixed gain, so that the speaker output is at the first sound pressure level. Control to be over 85 dB.

  When the control unit 20 outputs a non-alarm sound in a state where the maintenance operation mode is set by operating the operation unit 26, the control unit 20 controls the switch unit 62 to be turned off and inserts and connects the attenuator 60 to the audio signal input line. The non-alarm sound signal output from the D / A conversion port 48 of the control unit 20 is attenuated by the attenuator 60, and the speaker output of the non-alarm sound is within the range of, for example, 40 decibels to 50 decibels, which is the second sound pressure level. The sound pressure is controlled to be low.

  For this reason, in the construction of fire alarm equipment and periodic inspection, if the maintenance construction mode is set in the fire receiver 10, the non-alarm sounds such as the emergency telephone ringing tone, the guidance sound, and the switch operation sound will be output from the speakers 52 to 40. It is output at a low sound pressure within the range of decibels to 50 decibels, and even if a non-alarm sound is output, it does not feel noisy, does not interfere with the work around the fire receiver associated with the construction, and is surrounded by noise There is no inconvenience.

[Modification of the present invention]
(R type fire alarm equipment)
In the above embodiment, a P-type fire receiver is taken as an example. However, an analog fire detector having an address set on a transmission line known as an R-type is connected to monitor and alarm the fire in units of detectors. The same applies to fire receivers.

(Alarm and non-alarm sounds)
In the above embodiment, the speaker output of the fire receiver is divided into an alarm sound and a non-alarm sound, and in the maintenance construction mode, only the non-alarm sound is controlled to a low sound pressure. Without being limited to this classification, appropriate sound output and / or sound output may be controlled to a low sound pressure.

(Other)
The present invention is not limited to the above-described embodiment, includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above-described embodiment.

10: Receiver 12a: Fire report line 12b: Telephone line 14: Fire detector 16: Transmitter 18, 34: Telephone jack 20: Control unit 22: Line reception unit 24: Display unit 26: Operation unit 28: Transfer unit 30: Voice alarm unit 32: Call circuit unit 36, 40: Emergency telephone 38, 42: Plug 46: Sound source unit 48: Audio output port 50: Amplifier unit 52: Speaker 60: Attenuator 62: Switch unit

Claims (5)

In a fire receiver that receives and signals a fire signal from a fire detector installed in a warning area,
A sound source unit for outputting an alarm sound signal or a non-alarm sound signal;
An amplifying unit capable of controlling a sound pressure level output from a speaker by amplifying an alarm sound signal or a non-alarm sound signal output from the sound source unit;
In the first mode, the amplifying unit is controlled so that the speaker outputs of the alarm sound signal and the non-alarm sound signal have a predetermined first sound pressure level, and in the second mode, the speaker output of the alarm sound signal is the sound output level. The amplifying unit is controlled so as to be the first sound pressure level, and the amplifying unit is controlled so that the speaker output of the non-alarm sound signal is a predetermined second sound pressure level lower than the first sound pressure level. A control unit,
A fire receiver characterized by the provision of
In the fire receiver according to claim 1,
The amplifier is capable of controlling gain;
The fire receiver according to claim 1, wherein the control unit changes a sound pressure level of the warning sound signal and the non-warning sound signal by controlling a gain of the amplification unit.
In the fire receiver according to claim 1,
The amplifier is capable of controlling the attenuation amount of the input audio signal,
The fire receiver according to claim 1, wherein the controller changes sound pressure levels of the alarm sound signal and the non-alarm sound signal by controlling an attenuation amount of the amplifier.
2. The fire receiver according to claim 1, wherein the alarm sound signal output from the sound source unit includes a fire alarm signal or a failure alarm signal, and the non-alarm sound signal output from the sound source unit is an emergency telephone ringing signal, voice. A fire receiver comprising a guidance signal or a switch operation sound signal.
  2. The fire receiver according to claim 1, wherein the first sound pressure level is 70 decibels or higher, and the second sound pressure level is 40 decibels to 50 decibels.

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