JP6389065B2 - Emergency broadcasting equipment - Google Patents

Description

  The present invention relates to an emergency broadcast facility that performs an emergency broadcast in conjunction with a fire detection by a fire alarm facility.

  Conventionally, an emergency broadcasting facility is linked to a fire alarm facility, and when a fire occurs, it notifies the occurrence of the fire and performs an evacuation guidance broadcast.

  The fire receiver installed in the fire alarm facility outputs a fire alarm when a fire alarm signal is received from a fire alarm that has been detected and detected, and a fire alarm area indicating the fire alarm area The emergency broadcast device that has transmitted the floor signal as an identification signal to the emergency broadcast device and received this signal from the speaker installed on the floor where the fire occurred and the floor directly above it as a detector alarm broadcast is now "Please check the next broadcast as we have confirmed." Is output.

  When a predetermined time elapses for this alarm, or when a disaster prevention staff member visits the site and confirms a fire, the fire is received based on a fire confirmation operation such as a push button operation of the transmitter. A fire confirmation signal is sent from the aircraft to the emergency broadcasting device, and the detector alarm broadcast is switched from the previous broadcast to the fire broadcast. “Fire is on fire. Is output. In addition, when a predetermined set time has passed since the fire broadcast, the emergency broadcast apparatus switches to the entire building simultaneous broadcast.

  In addition, emergency broadcasting equipment is installed with equipment that complies with the standards stipulated by the Fire Service Law, and requires equipment inspection at least once every six months and general inspection at least once a year. When performing such an inspection, it is necessary to confirm that the speaker line and the speaker function normally in accordance with the inspection of the equipment.

  However, the number of speakers installed in the terminal may be enormous, and for checking the speakers, an alarm sound of a predetermined sound pressure output level is output from the speakers and measured at a position 1 meter away from the sound level meter. It needs to be confirmed by the value, and it takes time and effort. In addition, since a large alarm sound is output from the spice for inspection, it can not be inspected during weekday use hours, only on holidays and at night. In addition, there is no time limit, and inspections that make a warning sound at hospital facilities are not possible.

  In order to solve this problem, a microphone is provided for each speaker serving as a terminal, and the measurement sound from the microphone is transmitted to the emergency broadcasting device side to determine whether it is normal. Have been proposed, and the sound quality of the speaker line and the speaker is checked by outputting a test sound exceeding the audible frequency band (Patent Documents 1 and 2).

JP-A-6-233393 JP 2011-4319 A

  However, in the conventional emergency broadcasting device, since a microphone is provided for each speaker and the speaker is inspected, if there is a malfunction in the microphone provided in the speaker, a normal inspection of the speaker cannot be performed, When an abnormality of the speaker is detected, it is necessary to check whether there is an abnormality in the microphone provided in the speaker where the abnormality is detected.

  In addition, when checking a speaker with a microphone, the sound pressure output level is suppressed to a value lower than that for emergency broadcasting, but a sound pressure output level that can be detected with a microphone is necessary and installed in a hospital room. In the case of a loudspeaker, sound may not be produced even if the sound pressure is low. In addition, when checking with a speaker with a low sound pressure output level that can be detected by a microphone, it is unclear whether the sound pressure output level specified by the Fire Service Act can be obtained when an emergency broadcast signal is input. There is a possibility that the soundness of the speaker cannot be sufficiently confirmed as compared with the conventional speaker inspection using a meter.

  An object of the present invention is to provide an emergency broadcasting facility that can check a speaker function by detecting a value corresponding to a speaker sound pressure output level by emergency broadcasting without making a sound.

(Emergency broadcasting equipment)
The present invention provides an emergency broadcasting facility for outputting a predetermined emergency broadcast by connecting a plurality of speaker devices to a speaker line drawn for each predetermined broadcast area from the emergency broadcast device.
Emergency broadcast equipment
A broadcast output selection unit for selecting a speaker line and outputting a predetermined broadcast signal including a test broadcast signal;
A transmission unit for transmitting and receiving signals to and from a speaker device connected to the speaker line selected via the broadcast output selection unit;
A broadcast sound source unit that outputs a broadcast signal to the broadcast output selection unit;
When testing a speaker device , the broadcast output selection unit is instructed to select a plurality of speaker lines, and each time a speaker line is selected, the speaker connected to the selected speaker line is instructed to the transmission unit A broadcast control unit that transmits a test instruction signal from the broadcast sound source unit to the speaker device for testing after transmitting a test instruction signal to the device and switching to a test state;
With
The speaker device
A speaker with a voice coil connected to the speaker line;
A speaker transmission unit that transmits and receives signals to and from the emergency broadcast device via a speaker line;
A function test unit that switches to a test state in which a function test is performed without outputting sound from the speaker;
A speaker control unit that, when a test instruction signal is received by the speaker transmission unit, switches the function test unit to a test state to perform a function test, and determines whether the function is normal from the test result;
Equipped with a,
The function test section of the speaker device
A series circuit unit for connecting the speaker line to the voice coil of the speaker via a predetermined test load;
A test switch unit that bypasses the series circuit unit in the normal state, cancels the bypass of the series circuit unit in the test state, applies the output of the series circuit unit to the voice coil of the speaker, and is DC driven,
With
When the test instruction signal is received by the speaker transmission unit, the speaker control unit releases the bypass of the series circuit unit by opening the test switch unit, applies a predetermined DC voltage to the speaker, and the voltage across the test load is It is characterized in that it is determined that the function is normal when the voltage is higher than a predetermined threshold voltage .

(Individual collection of test results)
The broadcast control unit of the emergency broadcast device transmits a test instruction signal from the transmission unit to the speaker line selected by the broadcast output selection unit and performs a function test of the plurality of speaker devices, and then instructs the transmission unit to Send a call signal that sequentially specifies the address of the device and send a test response signal including the test result to inform the test result,
When the speaker control unit of the speaker device receives the calling signal designating the self address by the speaker transmission unit, the speaker control unit instructs the speaker transmission unit to transmit a test response signal including the test result of the function test to the emergency broadcast device.

(Speaker function test by detecting speaker open voltage)
When the speaker control unit receives a test instruction signal from the speaker transmission unit, the speaker control unit detects the speaker open side voltage of the speaker line separated from the speaker by opening the test switch unit, and the speaker open voltage is equal to or higher than a predetermined threshold voltage. It is determined that the function is normal.

(Speaker drive test by speaker DC drive)
The series circuit part of the speaker device is
A rectifier that rectifies the broadcast signal from the speaker line;
A smoothing unit having a predetermined time constant for smoothing the rectified output rectified by the rectifying unit and outputting the rectified output to the voice coil of the speaker;
A test resistor inserted and connected between the smoothing part and the voice coil of the speaker and serving as a test load ;
Ru equipped with.
Here, the resistance value of the test resistor is set to a value corresponding to the rated impedance of the speaker.

(Test result display function)
The speaker device includes a display unit that displays a test result so as to be visible from the outside.
When the speaker control unit receives a test instruction signal from the speaker transmission unit, the function control unit is switched to the test state to perform the function test, and from the test result, it is determined whether the function is normal and the determination result is displayed. Display on the screen.

(Basic effect)
According to the emergency broadcast facility of the present invention, the emergency broadcast apparatus includes a broadcast output selection unit, a transmission unit, a broadcast sound source unit, and a broadcast control unit, and the broadcast control unit instructs the broadcast output selection unit when performing a speaker test. Each time a plurality of speaker lines are selected and a speaker line is selected, a test instruction signal is transmitted to the speaker device connected to the selected speaker line by switching to the test state. A predetermined test broadcast signal is output from the broadcast sound source unit to the speaker device for testing, while the speaker device includes a speaker, a speaker transmission unit, a function test unit, a display unit, and a speaker control unit, and the speaker control unit transmits the speaker. When the test instruction signal is received by the unit, the function test unit is switched to the test state to perform the function test, and it is determined from the test result whether the function is normal. When performing a speaker test on a unit basis, disconnect the speaker from the speaker line, switch the function test unit to the test state, and supply and test an emergency broadcast signal as a test broadcast signal, for example. It is possible to check the soundness of the speaker line and speaker by performing a function test equivalent to speaker driving with a broadcast signal that has a speaker sound pressure output level that is higher than the legal standard value. There is no time restriction when performing the test, and it is possible to perform a function test of the speaker whenever necessary, and even in places where it is not possible to make sound from the speaker for inspection, such as hospital facilities Enables functional testing of speakers.

(Effects of individual collection of test results)
In addition, the broadcast control unit of the emergency broadcast device transmits a test instruction signal from the transmission unit to the speaker line selected by the broadcast output selection unit to perform a function test of the plurality of speaker devices, and then instructs the transmission unit to The speaker unit addresses are sequentially transmitted, a test response signal including a test result is transmitted to notify the test result, and the control unit of the speaker unit transmits a call signal having a self-address specified by the transmission unit. When received, the test response signal including the test result of the function test is sent to the emergency broadcasting device by instructing the transmission unit, so it is not necessary to go to the speaker installation location and look at the display unit to check the test result In addition, the emergency broadcast apparatus can easily and easily know the speaker test result, and can appropriately deal with the speaker determined to be abnormal by the function test.

(Effect of speaker function test by detecting speaker open voltage)
In addition, the functional test unit of the speaker device includes a test switch unit that disconnects the connection of the speaker line to the speaker, and the control unit is disconnected from the speaker by opening the test switch unit when receiving a test instruction signal from the transmission unit. Since the speaker open voltage on the speaker line side is detected and the function is determined to be normal when the speaker open voltage is equal to or higher than the predetermined threshold voltage, the speaker open voltage is detected from the relationship between the speaker sound pressure and the speaker open voltage. The function to estimate the speaker sound pressure output level without producing sound from the speaker and measuring with a sound level meter can be determined. Enable testing.

(Effect of speaker function test by speaker DC drive)
In addition, the functional test unit of the speaker device includes a rectifying unit that rectifies a broadcast signal from the speaker line, and a smoothing unit that has a predetermined time constant that smoothes the rectified output rectified by the rectifying unit and outputs the rectified output to the voice coil of the speaker when a test resistor that is inserted and connected between the smooth portion and the voice coil of the speaker, the rectifier unit in a normal state, the series circuit unit when performing a functional test with bypassing the series circuit portion including a smoothing unit and a test resistor A test switch unit that releases the bypass and applies the output of the series circuit unit to the voice coil of the speaker to drive a direct current, and the control unit opens the test switch unit when a test instruction signal is received by the transmission unit By canceling the bypass of the series circuit section and applying a predetermined DC voltage to the speaker, it is determined that the function is normal when the voltage across the test resistor is equal to or higher than the predetermined threshold voltage. The emergency broadcast signal supplied for function check is smoothed and rectified and applied as a DC voltage to the speaker's voice coil, so that no sound is produced from the speaker, and the impedance of the speaker's voice coil to DC is virtually zero. Therefore, the load on the speaker side is only the test resistance during the function test, and by detecting and evaluating the voltage across the test resistance, it is possible to determine whether or not the speaker sound pressure exceeds the standard value of the Fire Service Law. The function test for estimating the speaker sound pressure output level is made possible without producing sound from the speaker and measuring with a sound level meter.

  In addition, when a direct current voltage rectified and smoothed from a broadcast test signal corresponding to an emergency broadcast signal is directly applied to the voice coil of the speaker, the loudspeaker cone is driven in one direction by the direct current energization of the voice coil to generate a loud impact sound. However, since the rectifier has a predetermined time constant, the DC voltage to the voice coil rises slowly by charging the capacitor via the resistor, and the impact sound output by the DC drive of the speaker Enables functional tests without breaking the speaker cone.

(Effects of test result display function)
In addition, the speaker device includes a display unit that displays the test result so that it can be visually recognized from the outside. When the speaker control unit receives a test instruction signal from the speaker transmission unit, the function test unit is switched to a test state to perform a function test. Since the function is tested and it is determined whether or not the function is normal and the determination result is displayed on the display unit, if the function test is performed and it is determined that the function is normal, the speaker installed on the ceiling surface etc. By displaying the function normality by turning on, flashing, or blinking the indicator lamp provided at a position where it can be seen from inside the device, the inspector can check the status of the indicator lamp at the speaker installation location. The soundness of the speaker can be confirmed, and since the indicator lamp is not lit, it is known that there is an abnormality in the speaker and can be appropriately dealt with.

Explanatory diagram showing an overview of emergency broadcast equipment linked to fire alarm equipment The block diagram which showed the function structure of the emergency broadcast apparatus of FIG. 1 with the function structure of the fire receiver. The block diagram which showed the function structure of the broadcast output selection part and transmission part which were provided in the emergency broadcast apparatus of FIG. A circuit block diagram showing an embodiment of a speaker device for detecting a speaker open voltage by a function test A circuit block diagram showing another embodiment of a speaker device for performing a function test by DC driving of the speaker Flow chart showing test control of emergency broadcast equipment Flow chart showing test control of speaker device

[Outline of emergency broadcasting equipment]
FIG. 1 is an explanatory diagram showing an outline of an emergency broadcast facility linked to a fire alarm facility. As shown in FIG. 1, the emergency broadcast facility 10 includes an emergency broadcast device 14. As an external device, for example, a desktop microphone device 18 used for general business broadcast, a background music (BGM), a chime sound source, etc. A sound source device 20 including an audio file, a radio tuner, a CD player, and an emergency earthquake warning device 22 are connected as necessary.

  For example, speaker lines SL1 to SLn are drawn out from the emergency broadcasting device 14 by building floors, and a plurality of speaker devices 16 are connected to each of the speaker lines SL1 to SLn. The speaker device 16 of the present embodiment has a test function, and can perform a function test remotely without generating sound from the speaker in response to an instruction by a transmission signal from the emergency broadcast device 12 side.

  The speaker device 16 is installed with a sound pressure output level determined by firefighting laws and regulations according to broadcasting areas such as living rooms, non-residential rooms, corridors, and stairs. There are three types of speakers provided in the speaker device 16 according to the sound pressure output level: L class, M class, and S class, L class is 92 dB / 1 m or more, M class is 87 dB / 1 m or more, and S class is 84 dB / 1 m. Thus, the types of speakers that can be used and the number of installations are specified according to the floor area of the broadcast area.

In addition, each of the speaker lines SL1 to SLn uses three heat resistant wirings of a normal broadcast line N, an emergency broadcast line R, and a common line C. The normal broadcast line N may be provided with an attenuator (attenuator) for volume adjustment on the speaker branch side. In the following description, the speaker lines SL1 to SLn are referred to as the speaker lines SL when it is not necessary to distinguish them.

  On the other hand, the fire alarm system 12 includes a fire receiver 24. The sensor lines L1 to Ln are drawn from the fire receiver 24 for each warning area, and the sensor line L1 is shown as a representative line between the common line C. In addition, a fire detector 26 is connected. The fire detector 26 is a smoke detector or a heat detector, detects a change in a physical phenomenon such as smoke or heat caused by a fire, sends a notification, sends a notification signal to the fire receiver 24, and sends it to the fire receiver 24. The received fire receiver 24 outputs a fire alarm. Further, a transmitter (not shown) is connected between the sensor line L1 and the common line C as necessary.

  When the fire receiver 24 outputs a fire alarm, the fire receiver 24 performs an operation of outputting an interlock signal to an external device including the emergency broadcast facility 10. As the interlocking signal output from the fire receiver 24 to the emergency broadcast facility 10, a notification area identification signal indicating a notification area corresponding to the sensor lines L1 to Ln that the fire detector 26 has reported, for example, the emergency broadcast facility 10 is provided. If the building is 11 floors or more above which installation is required, there is a floor-by-floor signal indicating the fire alarm floor, and a fire confirmation signal when a fire confirmation is detected after the alarm is issued.

  When the emergency broadcast device 14 receives a floor signal indicating the floor of notification as a transfer signal from the fire receiver 24 of the fire alarm system 12, the emergency broadcast device 14 selects the speaker line on the floor where the fire has occurred and the floor immediately above and selects the speaker line from the speaker. A predetermined broadcast is output. In addition, the basement floor is included when the fire occurrence floor is the first floor.

  Further, when the emergency broadcast device 14 receives a fire confirmation signal from the fire receiver 24 after performing the alarm broadcast, the emergency broadcast device 14 outputs a predetermined fire broadcast from the speakers on the floor where the fire has occurred and the floor immediately above. Further, when a predetermined time has elapsed since the fire broadcast, the broadcast broadcast is switched to the broadcast broadcast that outputs the fire broadcast from the speakers on all floors.

  Moreover, when the non-fire is confirmed on-site during the alarm broadcast, the emergency broadcast device 14 outputs a predetermined non-fire broadcast from the speakers on the fire occurrence floor and directly above the floor by operating the non-fire broadcast switch.

[Functional configuration of emergency broadcast equipment]
FIG. 2 is a block diagram showing the functional configuration of the emergency broadcast apparatus together with the functional configuration of the fire receiver.

(Functional configuration of fire receiver)
First, the functional configuration of the fire receiver 24 will be briefly described. As shown in FIG. 2, the fire receiver 24 includes a reception control unit 50. The reception control unit 50 is a function realized by executing a program, for example, as a hardware, a CPU, a memory, various input / output ports, etc. Use a computer circuit equipped with

  For the reception control unit 50, a notification receiving unit 52, a display unit 54, an operation unit 56, an alarm unit 58, a floor-by-level transfer unit 60, a fire transfer unit 62, and a ringing stop receiving unit 64 are provided.

  The floor-level transfer section 60 is provided corresponding to the sensor lines L1 to Ln, and the floor-level transfer section 60 corresponding to the sensor line that has received the alert signal receives the floor lines EA1 to EAn. Send a signal. When the fire is confirmed, the fire transfer unit 62 transmits a fire confirmation signal through the transfer line EF. The ringing stop receiving unit 64 receives the ringing stop signal transferred from the emergency broadcasting device 14 and outputs it to the reception control unit 50.

  The reception control unit 50 instructs the display unit 54 and the alarm unit 58 when a fire alarm is detected from the reception output of the alarm signal by any of the alarm receivers 52 corresponding to the sensor lines L1 to Ln. Controls to display the representative fire display and fire area and to output a fire alarm sound.

  In addition, when the fire control is detected, the reception control unit 50 instructs the floor-specific transfer unit 60 and sets the floor on the transfer line EA1 corresponding to the sensor line that has detected the fire report, for example, the sensor line L1. Control to send another signal.

  In addition, after detecting a fire alarm, the reception control unit 50 instructs the fire alarm unit 62 to detect a fire confirmation from receiving a transmission signal or operating a fire confirmation switch, and fires the alarm line EF. Control to send a confirmation signal.

  In addition, when the reception control unit 50 detects reception of a ringing stop signal from the emergency broadcast device 14 via the ringing stop receiving unit 50 during ringing of the district bell (district acoustic device) based on reception of the fire, Control to stop ringing.

(Functional configuration of emergency broadcast equipment)
As shown in FIG. 2, the emergency broadcast apparatus 14 includes a broadcast control unit 28. The broadcast control unit 28 is a function realized by executing a program, for example, as a hardware, a CPU, a memory, various input / output ports, and the like. Use a computer circuit equipped with

  For the broadcast control unit 28, an operation unit 30, a display unit 32, a broadcast sound source unit 34, a microphone 36, a broadcast input selection unit 38, a broadcast output selection unit 40, a transmission unit 42, a floor reception unit 44, a fire reception unit. 46 and a ringing stop transmission section 48 are provided.

  The floor reception unit 44 is connected to the floor transfer unit 60 of the fire receiver 24 via the transfer lines EA1 to EAn and receives the floor signal. The fire receiving unit 46 is connected to the fire transfer unit 62 of the fire receiver 24 through the transfer line EF and receives the fire confirmation signal. The ringing stop transmission unit 48 outputs a ringing stop transmission signal to the fire receiver 24 via the ringing stop signal line EL.

  In addition to operation switches such as an emergency broadcast switch, a line selection switch, a speaker test switch, a non-fire broadcast switch, and a ringing stop switch, the operation unit 30 is provided with a display lamp and the like corresponding thereto. In addition, the display unit 32 is provided with a display such as a liquid crystal display so that the determination result of the speaker function test can be displayed.

  The broadcast sound source unit 34 stores broadcast message information such as alarm broadcasts, fire broadcasts, non-fire broadcasts, emergency broadcasts such as earthquakes and theft, training broadcasts, speaker test broadcasts, etc., and receives instructions from the broadcast control unit 28. The broadcast message information read out is converted into an analog broadcast signal and output. Broadcast message information for speaker test broadcast stored in the broadcast sound source unit 34 is a sine wave signal having a predetermined audio frequency. Further, as broadcast message information for speaker test broadcast, notification broadcast or fire broadcast can also be used as test broadcast.

  The microphone 36 is provided on the operation panel of the emergency broadcast device 14, and allows a person in charge of the disaster prevention center to perform broadcast input instructing evacuation guidance or the like as necessary.

  The broadcast input selection unit 38 inputs and connects the broadcast sound source unit 34, the microphone 36, the desktop microphone device 18 provided outside, the sound source device 20 and the emergency earthquake warning device 22, and selects a specific broadcast input according to an instruction from the broadcast control unit 28. And output to the broadcast output selection unit 40.

  The broadcast output selection unit 40 outputs the broadcast signal input from the broadcast input selection unit 38 to a line selected from the speaker lines SL1 to SLn according to an instruction from the broadcast control unit 28, and outputs the broadcast from the speaker device 16. In addition, the broadcast output selection unit 40 is provided with a power amplifier, which enables speaker output at the required L-class, M-class, or S-class sound pressure output level. The power amplifier may be provided for each speaker line, or a predetermined number of speaker lines may be grouped and provided for each group.

  When the broadcast control unit 28 detects the reception of the floor signal by any one of the transfer lines EA1 to EAn, the broadcast control unit 28 instructs the broadcast sound source unit 34 to reproduce and output the broadcast message information, and causes the broadcast input selection unit 38 to output it. Instruct to select broadcast input from the broadcast sound source unit 34, and further instruct the broadcast output selection unit 40 to select speaker lines on the floor where the fire occurred and directly above the floor, for example, speaker lines SL1 and SL2 Is output, and the alarm broadcast is output from the speaker of the speaker device 16 connected to the speaker lines SL1 and SL2.

  When the broadcast control unit 28 detects the reception of the fire confirmation signal by the fire receiving unit 46 after the notification broadcast, the broadcast control unit 28 instructs the broadcast sound source unit 34 to reproduce and output the fire broadcast message information, and the broadcast input selection unit 38. And the control which outputs a fire broadcast from the speaker connected to speaker line SL1, SL2 of a fire outbreak floor and a directly upper floor, for example via the broadcast output selection part 40 is performed.

  Further, when the broadcast control unit 28 detects the passage of a predetermined time from the fire broadcast, the broadcast control unit 28 instructs the broadcast output selection unit 40 to select all the speaker lines SL1 to SLn so as to switch to the simultaneous broadcast. Do.

  On the other hand, when the broadcast control unit 28 detects reception of a ringing stop operation by the ringing stop switch provided in the operation unit 30 based on the non-fire site confirmation after the notification broadcast, the broadcast control unit 28 instructs the broadcast sound source unit 34 to perform non-fire. Control that reproduces and outputs broadcast message information and broadcasts non-fire broadcasts from speakers connected to, for example, speaker lines SL1 and SL2 on the floor where the fire occurred and directly above the floor via the broadcast input selection unit 38 and the broadcast output selection unit 40 I do.

  In addition, when the broadcast control unit 82 detects reception of a ringing stop operation by the ringing stop switch provided in the operation unit 30 when performing emergency broadcasting using the microphone 36 during the ringing of the district bell of the fire alarm system 12, The ringing stop signal transmission unit 48 is operated to perform a control to output a linked stop signal.

  Moreover, the broadcast control part 28 performs control which broadcasts an emergency earthquake broadcast simultaneously, when the emergency earthquake warning information reception by the earthquake early warning apparatus 22 is detected. Furthermore, the broadcast control unit 28 controls general business broadcasts such as chimes, BGM, and calls as daily business broadcasts.

  In addition, when the broadcast control unit 28 detects acceptance of a speaker test operation by operating a speaker test switch provided in the operation unit 30, a test instruction signal in a packet format including test instruction information configured by a header part and a data part Each time the broadcast output selection unit 40 is instructed to sequentially select the plurality of speaker lines SL1 to Sln, a test instruction signal is transmitted to the selected speaker line SL by instructing the transmission unit 42 and the speaker device 16 is selected. Is switched to the test state, a test broadcast signal from the broadcast sound source unit 34 is sent to the speaker device 16 to perform a function test.

  In addition, the broadcast control unit 28 performs a function test of the speaker device 16 and then transmits a call signal in a packet format in which the transmission unit 42 is instructed to sequentially specify the address of the speaker device 16 and includes a test response including the test result. Control is performed to transmit a signal and display the test result on the display unit 32 for notification. For this reason, the speaker device 16 is preset with a unique address for each of the speaker lines SL1 to SLn.

  The transmission unit 42 is connected to the speaker transmission unit provided in the speaker device 16, and various signals necessary for the functional test of the speaker device 16 using the emergency broadcast line R and the common line L among the speaker lines SL <b> 1 to SLn as transmission lines. Send and receive.

[Test transmission function of emergency broadcasting equipment]
FIG. 3 is a block diagram showing functional configurations of a broadcast output selection unit and a transmission unit provided in the emergency broadcast apparatus of FIG.

  As shown in FIG. 3, the broadcast output selection unit 40 includes a selector 66. The selector 66 is an emergency broadcast selection switch that is turned on / off in response to an instruction from the broadcast control unit 28 corresponding to the speaker lines SL1 to SLn. 68-1 to 68-n are provided.

  The inputs of the switches 68-1 to 68-n are connected in common, and an emergency broadcast signal and a test broadcast signal selected by the broadcast input selection unit 38 can be input via the power amplifier 72. Further, the emergency broadcast lines R provided in the speaker lines SL1 to SLn are individually connected to the output sides of the switches 68-1 to 68-n.

  The selector 66 is provided with a general broadcast switch 70 which is turned on / off in response to an instruction from the broadcast control unit 28. The switch 70 receives a general broadcast signal selected by the broadcast input selection unit 38 and a power amplifier 74. The output of the switch 70 is commonly connected to the normal broadcast line N provided in the speaker lines SL1 to SLn.

  The transmission unit 42 includes a transmission control unit 76 and a voice modem 78. The output of the audio modem 78 is commonly connected to the inputs of the switches 68-1 to 68-n provided in the selector 66 of the broadcast output selection unit 40, and is selected by turning on any of the switches 68-1 to 68-n. Signal transmission is performed with the speaker transmission unit of the speaker device 16 connected to the speaker line SL.

  The voice modem 78 transmits / receives a packet signal of a predetermined format composed of a header part and a data part to / from the speaker transmission part of the speaker device 16 selected by the broadcast output selection part 40 and connected to the speaker line. That is, the voice modem 78 converts the packet signal received from the transmission control unit 76 into a packet signal having a voice frequency band of 300 to 3400 Hz corresponding to the audible band of the telephone line as a carrier wave, for example, and communicates at a speed of 1200 bps. The audio modem 78 demodulates the packet signal having the audio frequency band of 300 to 3400 Hz received from the speaker device 16 via the broadcast output selection unit 40 and outputs the demodulated packet signal to the transmission control unit 76.

  The voice modem 78 communicates with the speaker device 16 using half-duplex or full-duplex FSK (frequency shift keying), PSK (phase shift keying), or the like. Can be used.

[Functional configuration of speaker device]
(Function test by detecting speaker open voltage)
FIG. 4 is a circuit block diagram showing an embodiment of a speaker device for detecting a speaker open voltage and performing a function test.

  As shown in FIG. 4, the speaker device 16 includes a speaker 15, and the speaker 15 converts an electric signal into an acoustic output by flowing a broadcast signal through a voice coil 92. The speaker device 16 is provided with a power supply unit 80, a speaker transmission unit 82, a speaker control unit 84, a test switch unit 86, and a display unit 88 using LEDs in order to perform a function test of the speaker 15 without producing sound. ing. Here, the test switch unit 86 constitutes a function test unit.

  A signal line branched from the normal broadcast line N of the speaker line SL is connected to one end of the voice coil 92 of the speaker 15 via an attenuator 90 for volume adjustment, and the signal line branched from the emergency broadcast line R is connected to the test switch unit. A signal line branched from the common line C is connected to the other end of the voice coil 92.

  The power supply unit 80 connects the signal line branched from the normal broadcast line N and the signal line branched from the common line C as a power supply input line, and business broadcast or BGM from the emergency broadcast device 14 for the normal broadcast line N and the common line C The general broadcast signal is input and rectified and smoothed to be converted into a predetermined DC power supply voltage, and DC power is supplied to the speaker transmission unit 82 and the speaker control unit 84.

  In addition, since the general broadcast signal is limited to a time zone such as daytime and cannot be constantly supplied with power, the power supply unit 80 is provided with a secondary battery such as a lithium ion battery while the general broadcast signal is stopped. Operates the speaker transmission unit 82 and the speaker control unit 84 by supplying power from the secondary battery.

  As another power supply to the power supply unit 80, a predetermined DC power supply voltage is applied between the normal broadcast line N and the common line C from the power supply unit provided in the emergency broadcast device 14 to the power supply unit 80 of the speaker device 16. Power may be supplied. In this case, a DC cut capacitor is inserted and connected to a signal line connected to one end of the voice coil 92 of the speaker 15 branched from the normal broadcast line N so that the DC power supply voltage is not applied to the speaker 15.

The speaker transmission unit 84 is the same as the transmission unit 42 of the emergency broadcast apparatus 14 shown in FIG. 3, is configured by a manual transmission control unit and a voice modem, and is connected to the speaker line SL between the transmission unit 42 of the emergency broadcast apparatus 14. Packet signal generated using the emergency broadcast line R and the common line C, receiving and demodulating a packet signal having a voice frequency band of 300 to 3400 Hz as a carrier wave, and outputting it to the speaker control unit 84. Is converted into a packet signal having a voice frequency band of 300 to 3400 Hz as a carrier wave and transmitted at a speed of 1200 bps, for example.

  When the speaker control unit 84 detects the reception of the test instruction signal transmitted from the emergency broadcast device 14 via the speaker transmission unit 82, the speaker control unit 84 opens the test switch unit 86 that is normally closed to output from the emergency broadcast line R. The signal line is disconnected from the voice coil 92 of the speaker 15, and then the test broadcast signal for the speaker function test sent from the emergency broadcast device 14 through the emergency broadcast line R and the common line C, for example, a sine wave signal of a predetermined audio frequency. The speaker open voltage Vs is detected. When the speaker open voltage Vs is equal to or higher than the predetermined threshold voltage Vth, the normal function of the speaker 15 is determined. When the speaker open voltage Vs is lower than the threshold voltage Vth, the functional abnormality is determined to determine whether the function is normal. In such a case, for example, the display unit 88 is turned on to control normal function display. As another embodiment, when it is determined that the function is normal, the previous period display unit 88 is turned on, and when it is determined that the function is abnormal, the previous period display unit 88 is blinked. Alternatively, when it is determined that the function is abnormal, the previous period indicator lamp 88 is turned on or blinked. Accordingly, it may be possible to easily identify the speaker that has been determined to be functionally abnormal.

  The display unit 88 is installed at a position visible from the outside of the speaker device 16 installed on the ceiling surface or the like, and when a speaker function test is performed, a staff member goes to the installation site of the speaker device 16 and the state of the display unit 88 Therefore, normal function or abnormal function can be easily confirmed.

  In addition, when the speaker control unit 84 receives a call signal designating a preset self-address via the speaker transmission unit 82 after receiving the test instruction signal, the speaker control unit 84 transmits a test response signal including the test result of the function test to the speaker. The transmission unit 82 is instructed to transmit to the emergency broadcast device 14.

Here, the speaker open voltage Vs is received at the connection position of the speaker device 16 when the test sine wave signal is supplied from the power amplifier of the emergency broadcast device 14 to the emergency broadcast line R and the common line C of the speaker line SL. Signal voltage. The speaker 15 of the present embodiment uses a speaker that has an output sound pressure level of 92 dB / 1 m or more required for an L-class speaker at 1 watt input, and the rated impedance Z of 1 watt input is, for example, Z = 10 kΩ. , W = 1 watts voltage E (running value) required for input is W = E ² / Z
From this relationship, E = (W · Z) ^1/2 = (1 · 10000) ^1/2 = 100 volts, which is the speaker open voltage Vs.

  For this reason, the threshold voltage Vth for determining whether or not the speaker function is normal is set to Vth = 90 volts obtained by multiplying the open circuit voltage E = 100 volts required for 1 watt input by, for example, a coefficient 0.9.

  Further, the speaker control unit 84 directly inputs the speaker open voltage Vs, but actually, the voltage is divided to, for example, several volts or less which is 1 / n by a voltage dividing circuit provided in the control unit, and the divided speaker open is provided. Whether or not the speaker function is normal is determined by comparison with a threshold voltage (Vth / n) corresponding to the voltage (Vs / n).

  In addition, for example, an alert broadcast signal can be used as an emergency broadcast signal for the broadcast test signal. In this case, the speaker control unit 84 detects the speaker open voltage Vs by sampling the broadcast signal (audio signal) over a predetermined time to detect the average voltage. The threshold voltage Vth for determining whether or not the speaker function is normal is, for example, the transmission between the broadcast line R and the common line C at the connection position of the speaker device 16 installed at the farthest position of the speaker line SL. The broadcast signal is sampled over a predetermined time in the same manner as the speaker control unit 84 to measure an average voltage, and a voltage obtained by multiplying the measured voltage by a predetermined coefficient of 1 or less, for example, 0.9 is connected to the same speaker line SL. It may be set as the threshold voltage Vth of the speaker device.

In addition, there are individual differences in the rated impedance, cone, housing structure, and mounting state of the speakers, so it is necessary to obtain the prescribed sound pressure by measuring the applied voltage and actual sound pressure during manufacturing. The voltage is grasped and recorded as a threshold voltage in the speaker control unit. During the test, the recorded threshold voltage is set to determine whether it is normal.
(Function test by speaker DC drive)
FIG. 5 is a circuit block diagram showing another embodiment of a speaker device for performing a function test by DC driving of the speaker.

  As shown in FIG. 5, the speaker device 16 includes a speaker 15, and the speaker 15 converts an electric signal into an acoustic output by flowing a broadcast signal through a voice coil 92. In addition, in order to perform a function test of the speaker 15 without making sound, the speaker device 16 has a power supply unit 80, a speaker transmission unit 82, a speaker control unit 84, a test switch unit 86, an indicator lamp 88 using an LED, rectification A smoothing portion 96 including a diode 94, a resistor 98 and a capacitor 100, and a test resistor 102 are provided. The power supply unit 80 and the speaker transmission unit 82 are the same as those of the speaker device 16 of FIG.

  The test switch unit 86, the rectifying diode 94, the smoothing unit 96 including the resistor 98 and the capacitor 100, and the test resistor 102 constitute a functional test unit. The diode 94 constituting the rectifying unit rectifies the broadcast signal from the emergency broadcast line R by half wave. The smoothing unit 96 charges the capacitor 100 via the resistor 98 by the rectified output of the diode 94, and enables the smoothed DC voltage to be output to the voice coil 92 of the speaker 15.

Here, the resistor 98 and the capacitor 100 of the smoothing unit 96 constitute a time constant circuit, and the DC voltage is applied stepwise to the voice coil 92 of the speaker 15 with the rising of the DC voltage smoothed and output by the capacitor 100 being moderated. This prevents the generation of impact sound and the breakage of the speaker cone due to the application of a DC voltage.

  The test resistor 102 has a resistance value R corresponding to the rated impedance Z of the speaker 15. The speaker 15 is a 1 watt input that has an output sound pressure level of 92 dB / 1 m or more required for an L-class speaker, and the rated impedance Z of the 1 watt input is, for example, Z = 10 kΩ. The resistance value R of 102 is also 10 kΩ.

The test switch unit 86 is turned on and off by the speaker control unit 84, and is turned on in a normal state, bypassing the series circuit unit in which the diode 94, the resistor 98 of the smoothing unit 96, and the test resistor 102 are connected in series, from the emergency broadcast line R. The emergency broadcast signal is supplied to the voice coil 92 of the speaker 16 to enable broadcast output. In the case of the speaker function test, the test switch unit 86 is turned off by an instruction from the speaker control unit 84, and the bypass of the series circuit unit in which the diode 94, the resistor 98 of the smoothing unit 96 and the test resistor 102 are connected in series is released.

When the speaker control unit 84 receives the test instruction signal transmitted from the emergency broadcasting device 14 by the speaker transmission unit 82, the speaker control unit 84 turns off the test switch unit 86, and the diode 94, the resistor 98 of the smoothing unit 96, and the test resistor 102 are connected in series. Control to release the bypass of the connected series circuit section.

  Subsequently, the speaker control unit 84 rectifies the test broadcast signal sent from the emergency broadcast device 14 through the emergency broadcast line R and the common line C, for example, a sine wave signal having a predetermined audio frequency, by the diode 94 and by the smoothing unit 96. Smoothly, a predetermined DC voltage is applied to the voice coil 92 of the speaker 15 via the test resistor 102, and when the voltage across the test resistor 102 is equal to or higher than the predetermined threshold voltage Vth, it is determined that the speaker function is normal. When it is less than Vth, a function abnormality is determined, and when a function normal is determined, control is performed such that the display unit 88 is turned on to display the function normal.

Here, when a DC voltage rectified and smoothed from the emergency broadcast signal in the speaker function test is applied to the voice coil 92 via the test resistor 102 , the voice coil 92 has an inductance L, so that the impedance Z for the DC voltage of zero frequency is If a slight resistance is ignored, the resistance is substantially zero, resulting in a resistance load of only the test resistor 102.

Here, the resistance value R of the test resistor 102 is, for example, R = 10 kΩ corresponding to the rated impedance Z of the speaker 15, and a W = 1 watt input is obtained that achieves a sound pressure output level of 92 dB or more by applying a rectified and smoothed DC voltage. The AC input voltage E is equal to E = 100 volts (effective value) as in the case of FIG. 4, and is rectified and smoothed by the diode 94 and the smoothing unit 96 and passed through the test resistor 102. The both-end voltage (DC voltage) Vs of Vs is also Vs = 100 volts.

  For this reason, the threshold voltage Vth for determining whether or not the function of the speaker 15 is normal from the speaker open voltage Vs is a predetermined voltage Vs across the test resistor 102 generated by applying a DC voltage corresponding to an emergency broadcast signal of 1 watt input. A coefficient, for example, Vth = 90 volts multiplied by 0.9 is set. For this reason, if the voltage Vs across the test resistor 102 due to the application of the DC voltage detected in the function test is equal to or higher than the threshold voltage Vth = 90 volts, the emergency broadcast signal that is an AC voltage causes the voice coil 92 of the speaker 15 to have 1 watt or more. It can be confirmed that there is an input, and as a result, it can be estimated that the sound pressure output level from the speaker 15 is 92 dB / 1 m or more of the L class speaker, and it can be determined that the function is normal.

  Further, the speaker control unit 84 directly inputs the speaker open voltage Vs, but actually, the voltage is divided to, for example, several volts or less which is 1 / n by a voltage dividing circuit provided in the control unit, and the divided speaker open is provided. Whether or not the speaker function is normal is determined by comparison with a threshold voltage (Vth / n) corresponding to the voltage (Vs / n).

  Further, since the test resistor 102 is connected in series to the voice coil 92 of the speaker 15, it is possible to detect disconnection abnormality of the speaker 15. That is, when the voice coil 92 of the speaker 15 is disconnected, the voltage Vs across the test resistor 102 becomes Vs = 0 volts, so that an abnormality in the speaker disconnection can be detected and notified.

[Control of speaker function test]
(Emergency broadcast equipment test control)
FIG. 6 is a flowchart showing test control on the emergency broadcast apparatus side, which will be described below with reference to FIGS. 6 is a test control by the broadcast control unit 28 of the emergency broadcast device 14.

  In FIG. 6, the broadcast control unit 28 proceeds to S2 when detecting presence of a speaker test instruction by receiving an operation of a speaker test switch provided in the operation unit 30, for example, at step S1 (hereinafter, “step” is omitted). Select SL1. In addition, the detection of the speaker test instruction may include a test instruction from a fire alarm facility or the like at regular intervals by a timer in addition to the switch operation.

  Subsequently, the broadcast control unit 28 generates a test instruction signal in a packet format in S3, transmits the test instruction signal to the speaker unit 16 connected to the selected speaker line SL1 by instructing the transmission unit 42, and performs a function test. Then, the broadcast input selection unit 38 is instructed to select the output of the broadcast sound source unit 34, the broadcast sound source unit 34 is instructed to output, for example, a sine wave signal as a test broadcast signal, and the speaker is connected via the broadcast output selection unit 40. A function test is performed by supplying the emergency broadcast line R and the common line C of the line SL1.

  Subsequently, the broadcast control unit 28 proceeds to S4, in which the address of the speaker device 16 connected to the speaker line SL1 is sequentially specified, a call signal in a packet format is transmitted to perform a function test, and the test from the speaker device 16 is performed. A test response signal including the result is received, and test results indicating normal function or abnormal function are collected.

  Subsequently, the broadcast control unit 28 proceeds to S5, extracts information on the speaker device that has malfunctioned from the test results collected in S4, stores it in S6, and in S7, sends a test recovery signal in packet format to the speaker line SL1. Is transmitted, the test state of the speaker device 16 is canceled, and the normal state is restored.

  Subsequently, the broadcast control unit 28 determines whether or not all speaker line tests have been completed in S8, and if not completed, instructs the broadcast output selection unit 40 to switch to selection of the next speaker line SL2 in S9. Returning to S3, the processes of S3 to S8 are repeated in the same manner.

  When the broadcast control unit 28 determines in S8 that the test of all the speaker lines SL1 to SLn has been completed, the broadcast control unit 28 proceeds to S10 to display the information of the speaker device 16 in which the function is abnormal on the liquid crystal display or the like of the display unit 32 so that it can be confirmed. It is possible to appropriately and quickly cope with the speaker device 16 in which the function is abnormal.

(Speaker device test control)
FIG. 7 is a flowchart showing the test control on the speaker device side. For example, referring to FIG. 7 is a test control by the speaker control unit 84 of the speaker device.

  In FIG. 7, when the speaker control unit 84 detects reception of the test instruction signal via the speaker transmission unit 82 in step S11, the process proceeds to S12. For example, taking the speaker device of FIG. The function test unit is turned off and set to the test state, and a function test by test broadcasting is performed in S13. Subsequently, the speaker open voltage Vs is detected as a test voltage for the functional test in S14, and compared with the threshold voltage Vth in S15. If it is equal to or higher than the threshold voltage Vth, it is determined that the function is normal. And hold as test results.

  Subsequently, when the speaker control unit 84 detects reception of the calling signal designating the self-address in S16, the process proceeds to S17, and generates a test response signal including the function normality or function abnormality test result stored in S15, and the speaker transmission unit 82 To the emergency broadcast apparatus 14.

  Subsequently, the speaker control unit 84 proceeds to S18, and when the reception of the test restoration signal is detected via the speaker transmission unit 82, the test switch unit 86 is turned on to release the test state, and the test control ends.

[Modification of the present invention]
(Speaker function test)
In the above embodiment, as a speaker function test that does not emit sound, it is determined whether the speaker function is normal by detecting the speaker open voltage or detecting the voltage across the test resistor by driving the speaker with a DC voltage. If a functional test unit is provided, but the test broadcast signal is supplied in a test state in which sound is not output from the speaker and the speaker is operated in a pseudo manner, the same state is electrically created and tested. It is possible to use a function test unit having an appropriate configuration.

  For example, a test inductance having the same value as the speaker's rated impedance is provided, the test switch section switches from the speaker's voice coil to the test inductance, and a broadcast test signal is supplied to detect the voltage and current generated in the inductance. Thus, it can be determined whether or not the speaker function is normal.

(Speaker line)
The above embodiment is an example of an emergency broadcast apparatus using a three-wire speaker line, but is applied to an emergency broadcast apparatus using a two-wire speaker line of an emergency broadcast line and a common line. You can also.

(Transmission method)
In the above embodiment, between the transmission unit of the emergency broadcast device and the transmission unit of the speaker device, the speaker line is used to convert the signal into a signal having a voice frequency band of 300 to 3400 Hz as a carrier wave. When the communication quality of the speaker line is high, high-speed data communication using a carrier wave in a frequency band exceeding the audio frequency band may be used.

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

10: Emergency broadcast facility 12: Fire alarm facility 14: Emergency broadcast device 16: Speaker device 18: Desktop microphone device 20: Sound source device 22: Emergency earthquake warning device 24: Fire receiver 26: Fire detector 28: Control unit 30: Operation unit 32: display unit 34: broadcast sound source unit 36: microphone 38: broadcast input selection unit 40: broadcast output selection unit 42: transmission unit 44: floor reception unit 46: fire reception unit 48: ringing stop transfer unit 50: Reception control unit 60: floor-specific transmission unit 62: fire transmission unit 64: ringing stop reception unit 66: selectors 68-1 to 68- n , 70: switch 72, 74: power amplifier 76: transmission control unit 78: audio Modem 80: Power supply unit 82: Speaker transmission unit 84: Speaker control unit 86: Test switch unit 88: Indicator light 90: Attenuator 92: Voice coil 94: Diode 96: Smoothing unit 102: Test resistance

Claims (6)

In an emergency broadcasting facility that outputs a predetermined emergency broadcast by connecting a plurality of speaker devices to a speaker line drawn out for each predetermined broadcast area from the emergency broadcast device,
The emergency broadcast device
A broadcast output selection unit that selects the speaker line and outputs a predetermined broadcast signal including a test broadcast signal;
A transmission unit for transmitting and receiving signals to and from a speaker device connected to the speaker line selected via the broadcast output selection unit;
A broadcast sound source unit that outputs the broadcast signal to the broadcast output selection unit;
When testing the speaker device, the broadcast output selection unit is instructed to sequentially select the plurality of speaker lines, and each time a speaker line is selected, the transmission unit is instructed to select the selected speaker line. A broadcast control unit that transmits a test instruction signal to a connected speaker device and switches to a test state, and then outputs the test broadcast signal from the broadcast sound source unit to the speaker device for testing,
With
The speaker device
A speaker having a voice coil connected to the speaker line;
A speaker transmission unit that transmits and receives signals to and from the emergency broadcast device via the speaker line;
A functional test unit for switching to the test state in which the functional test without outputting sound from the speaker,
When receiving the test instruction signal by the loudspeaker transmitting unit, the functional test unit to perform the functional test is switched to the test condition, and the speaker control unit functions from the test results to determine normal or not,
Equipped with a,
The function test unit of the speaker device is
A series circuit unit for connecting the speaker line to a voice coil of the speaker via a predetermined test load;
In the normal state, the test circuit unit bypasses the series circuit unit, and in the test state, cancels the bypass of the series circuit unit and applies the output of the series circuit unit to the voice coil of the speaker to be DC-driven,
With
The speaker control unit, when receiving the test instruction signal by the speaker transmission unit, cancels the bypass of the series circuit unit by opening the test switch unit, and applies a predetermined DC voltage to the speaker, An emergency broadcasting facility , wherein the function is determined to be normal when the voltage across the test load is equal to or higher than a predetermined threshold voltage .
In the emergency broadcast equipment according to claim 1,
The control unit of the emergency broadcast device transmits a test instruction signal from the transmission unit to the speaker line selected by the broadcast output selection unit and performs a function test of the plurality of speaker devices, and then sends the test signal to the transmission unit. Instructing and transmitting the test response signal including the test result by transmitting a calling signal that sequentially designates the addresses of the plurality of speaker devices and informing the test result,
When the speaker control unit of the speaker device receives the calling signal designating a self-address by the speaker transmission unit, the speaker transmission unit instructs the speaker transmission unit to transmit the test response signal including the test result of the functional test. An emergency broadcast device, wherein the emergency broadcast device is transmitted to the emergency broadcast device.
In emergency broadcast facility according to claim 1, wherein said speaker controller, when receiving the test instruction signal by the loudspeaker transmission unit, of the loudspeaker line side detached from the speaker by the opening of the test switch unit An emergency broadcasting facility, wherein a speaker open voltage is detected, and the function is determined to be normal when the speaker open voltage is equal to or higher than a predetermined threshold voltage.
In the emergency broadcast equipment according to claim 1 ,
The series circuit portion of the speaker device is
A rectifying unit for rectifying a broadcast signal from the speaker line;
A smoothing unit having a predetermined time constant for smoothing the rectified output rectified by the rectifying unit and outputting the rectified output to the voice coil of the speaker;
A test resistor inserted and connected between the smoothing portion and the voice coil of the speaker and serving as the test load ;
Emergency broadcast equipment, characterized in that it is provided with a.
5. The emergency broadcast facility according to claim 4, wherein the resistance value of the test resistor is a value corresponding to the rated impedance of the speaker.
In the emergency broadcast equipment according to any one of claims 1 to 4,
The speaker device includes a display unit that displays a test result so as to be visible from the outside.
The speaker control unit, when receiving the test instruction signal by the loudspeaker transmitting unit, the functional test unit to perform the functional test is switched to the test condition, determines whether the normal functions from the test results Then, the emergency broadcast facility is characterized in that a discrimination result is displayed on the display unit.

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