JP2007128221A - Alarm connection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alarm connection system, capable of easily installing alarms at low cost. <P>SOLUTION: This system comprises fire sensors 40a-40d detecting abnormality of a monitoring area and giving an alarm, a coaxial cable c for inputting and outputting signal to TV 35a-35d and an announcement broadcast receiver 31, and an input and output part for performing input or output of signal to the fire sensors 40a-40d through the coaxial cable c connected to the fire sensors 40a-40d. As the communication cable, for example, a network cable for transmitting network signal can be used in addition to the coaxial cable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an alarm device that detects an abnormality in a monitoring area and issues an alarm, and more particularly to a connection system for connecting this alarm device to various devices such as other alarm devices and a centralized control panel.

  In recent years, due to fire damage and aging, there is a tendency to require installation of sensors in the house, and even for existing houses that have not yet been equipped with disaster prevention equipment, a house that operates with batteries or AC power Fire detectors or fire gas leak alarms are being installed. These fire detectors and fire gas leak alarms, when detecting smoke, heat, or gas, notify the abnormality via voice through the built-in speaker, but in recent apartments and detached houses, In this case, since the sound insulation is increased, for example, there is a case where an alarm sound is sounded in the kitchen at midnight but is not noticed in the bedroom.

  In order to solve such a problem, conventionally, there has been proposed an interlocking method in which when one sensor is operated, another sensor sounds in conjunction with the alarm. For example, Japanese Patent Application Laid-Open No. 2005-222319 discloses a control method for an alarm device that transmits an interlock signal to another alarm device when an abnormality is detected by the alarm device (see, for example, Patent Document 1). .

  When multiple alarm devices are linked to each other in this way, or when the alarm device is connected to other devices such as a centralized control panel, these devices are conventionally connected by dedicated signal lines. It was. This signal line is laid as a dedicated line for the alarm device. For example, a lead wire covered with polyethylene or the like has been used.

JP 2005-222319 A

  However, conventionally, since a signal line dedicated to an alarm device was laid, wiring work was required when installing the alarm device. In particular, in order to install a signal line in an existing house, it is necessary to make a new hole in the wall of the dwelling unit. It was. Therefore, even if the alarm device is battery-powered and power supply connection is not required, for example, wiring work will be required in order to link the alarm device, etc. It was falling.

  In order to solve such a problem, it is conceivable to provide a wireless transmission / reception function in an alarm device or a centralized control panel. However, in this case, there is a possibility that the manufacturing cost of the alarm device becomes high, or that the communication function is lowered in a residential environment where radio wave shielding is high, so that abnormality notification cannot be performed reliably.

  This invention is made in view of the above, Comprising: It aims at providing the connection system of an alarm device which can perform the installation of an alarm device simply and at low cost.

  In order to solve the above-described problems and achieve the object, the present invention according to claim 1 is configured to detect an abnormality in a monitoring area and generate an alarm, and input a signal to a predetermined device other than the alarm device. Or a communication cable for outputting, and input / output means for inputting or outputting a signal to the alarm device via the communication cable connected to the alarm device.

  According to a second aspect of the present invention, in the first aspect of the present invention, the communication cable is a coaxial cable for inputting or outputting a TV signal to a TV receiver. .

  According to a third aspect of the present invention, in the first aspect of the present invention, the communication cable is a network cable for inputting or outputting a network signal to a network device.

  According to a fourth aspect of the present invention, in the present invention according to any one of the first to third aspects, the input / output means is provided integrally with the alarm device.

  According to a fifth aspect of the present invention, in the present invention according to any one of the first to third aspects, the input / output means is connected to a connection terminal for a signal transmitted via the communication cable. It is provided integrally with the terminal unit.

  According to a sixth aspect of the present invention, in the present invention according to any one of the first to fifth aspects, the input / output means is configured to output the alarm from signals input or output via the communication cable. Band limiting means for passing only a signal of a predetermined frequency band input or output to the device.

  According to a seventh aspect of the present invention, in the present invention according to any one of the first to sixth aspects, the input / output means inputs the predetermined device other than the alarm device via the communication cable. Or it has a demodulation means which demodulates the modulation signal output.

  According to this invention, since it is possible to input / output signals to / from the alarm device via a communication cable for a predetermined device other than the alarm device, it is not necessary to lay a signal line dedicated to the alarm device. The work and cost of laying a line can be eliminated, and an alarm can be installed easily and at low cost even in an existing house.

  According to the present invention, since a signal can be input / output to / from the alarm device via a coaxial cable that has been laid in a general house for TV signal input / output, a signal line dedicated to the alarm device can be provided. Since there is no need to lay, the work and cost of laying this signal line can be eliminated, and the alarm can be installed simply and at low cost.

  According to the present invention, since the signal input / output to / from the alarm device can be performed via the network cable that has been laid in a general house for the input / output of the network signal, the signal line dedicated to the alarm device is provided. Since there is no need to lay, the work and cost of laying this signal line can be eliminated, and the alarm can be installed simply and at low cost.

  According to the present invention, by providing the input / output means integrally with the alarm device, other devices can be used as they are without having to newly provide an input / output unit, so that the existing housing can be used as it is. Can easily install an alarm.

  According to the present invention, since the input / output means is provided integrally with the connection terminal unit, the alarm device having the same configuration as the conventional one can be used without newly providing an input / output unit. Can be installed easily.

  According to the present invention, by passing only a signal in a predetermined frequency band input or output to the alarm device, the alarm signal is frequency-multiplexed and transmitted / received to a communication cable for a predetermined device other than the alarm device. It becomes possible to communicate with the alarm device via a communication cable for a predetermined device.

  According to the present invention, the modulation signal can be demodulated using the demodulating means, so that the modulation signal output to the predetermined device other than the alarm device can be received by the alarm device. This function can be replaced with an alarm device, so that the number of installations of the predetermined device can be reduced, or the convenience of the device can be enhanced by expanding the output range of the predetermined device.

  Embodiments of an alarm connection system according to the present invention will be described below in detail with reference to the accompanying drawings. First, [I] the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] finally, a modification to each embodiment was explained. To do. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The present invention generally relates to a connection system for connecting an alarm device that detects an abnormality in a monitoring area and issues an alarm to various devices such as other alarm devices and a centralized control panel. The specific alarm function of this alarm device is arbitrary, and examples of the alarm device include a fire sensor, a human body sensor, a human body light, and a security camera. In the following description, a case where the alarm device is a fire detector will be described. Moreover, the place where the alarm device is installed is arbitrary, and the alarm device can be installed in a detached house or an apartment house. However, the case where the alarm device is installed in a detached house will be described below.

  Here, one of the features of the alarm connection system is that a signal can be input to or output from the alarm device via a communication cable for inputting or outputting a signal to a predetermined device other than the alarm device. It is in. For example, in each room of a general house, a coaxial cable for transmitting a TV signal and a LAN cable (network cable) for LAN (Local Area Network) are often laid. By making it possible to connect an alarm device to the alarm device, it is possible to eliminate the necessity of laying a dedicated signal line on the alarm device and to install the alarm device easily and at low cost. In order to enable the connection via the coaxial cable or the LAN cable in this way, in each embodiment, the input / output for inputting / outputting the signal transmitted using the coaxial cable or the LAN cable to the alarm device. Means are provided. In each of the embodiments, the specific configuration of the input / output unit is changed according to the type of equipment connected to the alarm device via a coaxial cable or a LAN cable.

[II] Specific Contents of Each Embodiment The specific contents of each embodiment will be sequentially described in detail below with reference to the accompanying drawings.

[Embodiment 1]
First, the first embodiment will be described. In the first embodiment, a plurality of alarm devices are connected to each other via a coaxial cable.

(Basic configuration of broadcasting system)
First, a basic configuration of a broadcasting system in which an alarm device according to Embodiment 1 is incorporated will be described. FIG. 1 is a block diagram showing a configuration of a broadcasting system according to the first embodiment. As shown in FIG. 1, the broadcasting system 1 includes a center device 10 and a head end 11 provided on the center side, various devices described later provided in each dwelling unit, and transmission for connecting the center side and each dwelling unit. A system 20 is provided.

The center device 10 generates a notification broadcast signal having an arbitrary content, and this notification broadcast signal is modulated by the head end 11 and then output to the transmission system 20 (hereinafter referred to as a TV signal, a notification broadcast signal, and so on). Are collectively referred to as broadcast signals). The head end 11 is an interface that controls communication on the center side, and receives notification broadcast signals output from the center apparatus 10 and TV signals received via a UHF antenna, a VHF antenna, a BS / CS antenna, or the like. Then, it is modulated and output to the transmission system 20.

  The transmission system 20 is configured by arranging an amplifier 22, a distribution amplifier 23, a distributor 24, and a protector 25 on a path of a transmission line 21 from the head end 11 to each dwelling unit. The amplifier 22 is an amplifying unit that amplifies a signal flowing through the transmission line 21. The distribution amplifier 23 is distribution amplification means that amplifies the signal and distributes the amplified signal to each dwelling unit. The distributor 24 is distribution means for distributing the signal amplified by the distribution amplifier 23 toward each dwelling unit. The protector 25 is a direct current component limiting unit that is provided in each dwelling unit and controls a direct current component that rides on the transmission line 21 and reaches each dwelling unit.

  In each of the units R1 to R4, a centralized control panel 30, a notification broadcast receiver 31, an interphone 32, a mixing / distributing device 33, a plurality of serial units 34a to 34d, a plurality of TVs 35a to 35d, and a plurality of fire detectors 40a-40d are installed as shown. These devices are connected to each other as shown in the figure via coaxial cables c1 to c15 (in addition, the coaxial cable is generically referred to as a coaxial cable c unless otherwise required). .

  The centralized control panel 30 demodulates the broadcast signal modulated on the center side, transmits the TV signal of the broadcast signal to the TVs 35a to 35d, and transmits the notification broadcast signal to the notification broadcast receiver 31. Means. The notification broadcast receiver 31 receives and outputs the notification broadcast signal transmitted from the central control panel 30. The intercom 32 is an output means for outputting a predetermined intercom signal to the intercom 32 when operated by a visitor. The mixing / distributing device 33 distributes the TV signal transmitted from the centralized control panel 30 toward each of the serial units 34a to 34d, and also transmits a transmission signal and a response signal transmitted / received between the fire detectors 40a to 40d. Mix and dispense. The series units 34a to 34d are connection terminals for the TVs 35a to 35d, and also function as input / output terminals for inputting / outputting transfer signals and response signals to / from the fire detectors 40a to 40d. The TVs 35a to 35d output TV signals received via the serial units 34a to 34d, and correspond to predetermined devices and TV receiving means in the claims. The fire detectors 40a to 40d detect the occurrence of a fire in the monitoring region by a known method and output a transfer signal, and correspond to the alarm device in the claims. Of these components, the centralized control panel 30, the mixer / distributor 33, the serial units 34a to 34d, and the TVs 35a to 35d are the conventional TV image receiving system, the hearing system, or the notification broadcast unless otherwise specified. The configuration is the same as that used in the system.

(Connection form of fire detectors 40a to 40d)
The fire detectors 40a to 40d are connected to the same system as the transmission system from the central control panel 30 to the TVs 35a to 35d. That is, the fire detectors 40a to 40d are not a dedicated system using a dedicated signal line (lead wire) as in the prior art, but like the TVs 35a to 35d, the mixer / distributor 33, the series units 34a to 34d, and The central control panel 30 is connected via a coaxial cable c.

  FIG. 2 is a block diagram conceptually showing the electrical configuration of the fire detectors 40a to 40d. The fire detectors 40a to 40d are generally configured by connecting a sensor unit 41, a sound alarm unit 42, a speaker 43, a display unit 44, and a control unit 45 as shown in the figure, as in the prior art. ing. The sensor unit 41 is a fire detection unit that detects the occurrence of a fire in the monitoring area by a known method. The voice alarm unit 42 notifies the resident of the fact that a fire has been detected when a fire is detected by the sensor unit 41 or when a warning signal is received from other fire detectors 40a to 40d. Is a voice alarm means for outputting the predetermined voice message via the speaker 43. The display unit 44 is a display means for visually displaying ON / OFF of the power supply in the fire detectors 40a to 40d, presence / absence of fire detection, and the like. The control unit 45 is a control unit that controls each unit of the fire detectors 40a to 40d, and includes, for example, a CPU (Central Processing Unit) (not shown) and a program that is interpreted and executed by the CPU. The fire detectors 40a to 40d include a power supply unit (not shown), and the power supply unit supplies power supplied from a battery or an AC power source to each unit of the fire detectors 40a to 40d.

  The fire detectors 40a to 40d include an input / output unit 46 in addition to the same configuration as the conventional one. The input / output unit 46 is used to input or output signals to the fire detectors 40a to 40d via the coaxial cable c, and corresponds to the input / output means in the claims. The input / output unit 46 according to the first embodiment includes a filter 46a. This filter 46a is for enabling input / output of only signals in a predetermined frequency band among signals to the fire detectors 40a to 40d, and corresponds to the band limiting means in the claims. That is, input / output of signals to / from the fire detectors 40a to 40d is performed through the coaxial cable c as described above, and TV signals reaching the TVs 35a to 35d are transmitted to the coaxial cable c. Therefore, signal transmission / reception is performed between the fire detectors 40a to 40d using a frequency band different from the frequency band of the TV signal. For example, in FIG. 3, the signals of the fire detectors 40a to 40d are transmitted and received by superimposing a frequency near 32 KHz that does not overlap with the UHF signal, the VHF signal, or the BS / CS signal on the coaxial cable c. In this case, the filter 46a is configured as a band-pass filter that passes only signals having a frequency around 32 KHz and attenuates signals having other frequencies.

(Linked communication of fire detectors 40a to 40d)
Next, the interlocking communication performed between the fire detectors 40a to 40d connected in this way will be described. FIG. 4 is a timing chart of linked communication of the fire detectors 40a to 40d. Hereinafter, the fire detectors 40a to 40d that have detected a fire are referred to as “link sources”, and other fire detectors 40a to 40 that perform a linked operation by receiving a transfer signal from the fire sensors 40a to 40d of the link sources. 40d is referred to as a “link destination”.

  The control unit 45 of each of the fire detectors 40a to 40d in the rooms R1 to R4 regularly monitors the output from the sensor unit 41, and determines the presence or absence of a fire based on this output. For example, when the control unit 45 of the fire detector 40a determines that a fire has occurred, the control unit 45 outputs a control signal to the sound alarm unit 42, thereby sounding that a fire has been detected in the monitoring area of the fire detector 40a. The message is output through the speaker 43 (t1 in FIG. 4). For example, a voice message such as “A fire has been detected in this room” is output.

  Next, the control unit 45 of the fire detector 40a outputs a report to the linked fire detectors 40b to 40d. Specifically, when the control unit 45 outputs a control signal to the input / output unit 46, the input / output unit 46 outputs a transmission signal at a predetermined frequency f1 within the pass frequency band of the filter 46a. The transfer signal passes through the filter 46a and is sent to the coaxial cable c6 (t2 in FIG. 4). At this time, the control unit 45 continuously outputs the transfer signal at a predetermined interval until a response signal described later is received from the fire detectors 40b to 40d as the interlocking destination (t3 in FIG. 4). As a result, the plurality of fire detectors 40a to 40d can be linked more reliably.

  The transmission signal output in this way is input to the mixing / distributing device 33 through the coaxial cable c6, the series unit 34a, and the coaxial cable c4 in order. The mixer / distributor 33 mixes the inputted transfer signal with other signals and sends them to the coaxial cables c7, c10, and c13. This transfer signal reaches the serial units 34b to 34d and reaches the TVs 35b to 35d via the coaxial cables c8, c11 and c14, or the linked fire detectors 40b to 35d via the coaxial cables c9, c12 and c15. 40d. However, since this transferred signal is transmitted in a frequency band different from that of the TV signal, it does not affect the reception of the TV signal on the TV. On the other hand, when the transfer signal is received by the linked fire detectors 40b to 40d, it passes through the filter 46a of the input / output unit 46 of the linked fire detectors 40b to 40d to the control unit 45. Input (t4, t5 in FIG. 4).

  In these linked fire detectors 40b to 40d, the control unit 45 monitors the presence or absence of an input of a transfer signal from the other fire detectors 40a to 40d. By determining that a fire has been detected in any of the other fire detectors 40a to 40d and outputting a control signal to the voice alarm unit 42, a voice message to the effect that the transfer signal from the interlocking source has been received is received. And output through the speaker 43 (t6 in FIG. 4). For example, a voice message such as “Another sensor has been activated” is output.

  Next, the control unit 45 outputs a response indicating that the transfer signal has been received, to the fire detector 40a that is the interlocking source. Specifically, when the control unit 45 outputs a control signal to the input / output unit 46, the input / output unit 46 sends a response signal limited to a predetermined frequency by the filter 46a within the range of the pass frequency band of the filter 46a. And is sent to the coaxial cables c9, c12, c15 at a predetermined frequency f2 that is different from the frequency f1 of the transfer signal (t7 in FIG. 4). The reason why the response signal is transmitted at a frequency f2 different from that of the transfer signal is to avoid a collision with the transfer signal. Moreover, in order to avoid that the response signals from the plurality of fire detectors 40b to 40d as the interlocking destinations collide with each other, the control unit 45 performs a random time (t8 in FIG. 4) after receiving the transfer signal. After elapses, a response signal is output.

  This response signal is received by the interlocking fire detector 40a through a path opposite to the previous transfer signal, passes through the filter 46a of the fire detector 40a, and is input to the control unit 45 (FIG. 4 t9). The control unit 45 monitors the response signal from the linked fire detectors 40b to 40d after the output of the previous signal, and as described above, the signal is transmitted until the response signal is received. Are continuously output (FIGS. T2 and t3). When this response signal is received, the output of the transfer signal is stopped. In addition, the control unit 45 outputs a control signal to the voice alarm unit 42 so that a response message indicating that the response signals of the fire detectors 40b to 40d as the interlocking destinations have been received is output via the speaker 43 ( T10 in FIG. For example, a response message such as “An interlocking alarm in another room has been completed” is output.

(Effect of the first embodiment)
As described above, according to the first embodiment, the fire detectors 40a to 40d can be linked using the coaxial cable c conventionally laid in each room of a general house, and the fire detectors 40a to 40d. Therefore, it is not necessary to lay a signal line dedicated to interlocking, so that the work and cost of laying this signal line can be eliminated, and the installation of the fire detectors 40a to 40d can be performed easily and at low cost. In particular, since the input / output unit 46 is provided inside the fire detectors 40a to 40d, only the configuration of the fire detectors 40a to 40d may be different from the conventional one, and the other devices have the same configuration as the conventional one. Since it can be used as it is, the fire detectors 40a to 40d can be easily installed in existing houses.

[Embodiment 2]
Next, the specific content of Embodiment 2 which concerns on this invention is demonstrated in detail. The second embodiment is different from the first embodiment in that the input / output unit is built in the series unit. However, unless otherwise specified, the configuration is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, if necessary. To do.

  FIG. 5 is a block diagram showing a configuration of a main part of the broadcasting system according to the second embodiment. In the second embodiment, the fire detectors 50a to 50d are configured in the same manner as conventional fire detectors, and the input / output unit 46 is omitted from the fire detectors 40a to 40d of the first embodiment. ing. On the other hand, the series units 60a to 60d are embedded and fixed to the wall surface w of each room of the dwelling unit, and are the same as the series units 34a to 34d of the first embodiment (or the same as the conventional series unit), coaxial cables. A plurality of connection terminals 61 to 63 for connecting c and a mixing / distributing circuit 64 are provided. Then, by connecting the coaxial cable c to the connection terminals 61 to 63, a signal transmitted / received via the coaxial cable c can be relayed via the mixing / distributing device 64.

  The series units 60a to 60d are TV signal connection terminals, and correspond to the connection terminal units in the claims. These series units 60a to 60d include an input / output unit 46 in addition to the same configuration as the conventional one. The input / output unit 46 is used to input or output signals to the fire detectors 50a to 50d via the coaxial cable c, and corresponds to the input / output means in the claims. However, since the input / output unit 46 can be configured in the same manner as in the first embodiment, the description thereof is omitted.

  According to such a structure, the transmission signal output from the fire detectors 50a to 50d of the interlocking destination passes through the filter 46a of the input / output unit 46 of the series units 60a to 60d, and further via the coaxial cable c. It passes through the filter 46a of the input / output unit 46 of the other series units 60a to 60d and is received by the fire sensors 50a to 50d as the interlocking sources. Further, the response signals output from the interlocking fire detectors 50a to 50d are received by the interlocking fire detectors 50a to 50d via a path opposite to the transfer signal. Furthermore, a signal (for example, a TV signal) having a frequency other than the pass frequency band of the filter 46a is attenuated by the filter 46a, thereby preventing an accidental input to the fire detector.

(Effect of the second embodiment)
As described above, according to the second embodiment, in addition to the same effects as those of the first embodiment, the input / output unit 46 is provided in the series units 60a to 60d, so that the fire detectors 50a to 50d are included. Other devices can be used as they are, and existing fire detectors can be easily installed.

[Embodiment 3]
Next, specific contents of the third embodiment according to the present invention will be described in detail. Unlike Embodiment 1, Embodiment 3 relates to an embodiment in which a signal from a notification broadcast receiver or intercom can be received by a fire detector. However, unless otherwise specified, the configuration is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, if necessary. To do.

  FIG. 6 is a block diagram showing a configuration of a main part of the broadcasting system according to the third embodiment. In the broadcast system 1, the notification broadcast receiver 70 and the interphone 90 are connected to the centralized control panel 30 via the mixing / distributing device 91 and the coaxial cable c. Accordingly, an output from the notification broadcast receiver 70 (a modulated signal modulated by a modulation unit (not shown) inside the notification broadcast receiver 70) or an output from the interphone 90 (modulation by a modulation unit (not shown) inside the interphone 90). The modulated signal) is superimposed on the coaxial cable c via the mixing / distributing device 33 and received by the centralized control panel 30.

  FIG. 7 is a block diagram showing an electrical configuration of notification broadcast receiver 70 according to the third embodiment. The notification broadcast receiver 70 receives and outputs a notification broadcast signal, and corresponds to a predetermined device in the claims. In general, the notification broadcast receiver 70 includes a power supply unit 71, an AC outlet 72, a demodulation unit 73, an audio switching unit 74, an audio recording unit 75, a volume adjustment unit 76, an amplifier 77, and a speaker 78, as in the past. , An operation unit 79, a display unit 80, a memory 81, and a control unit 82.

  The power supply unit 71 is a power supply unit that supplies commercial power supplied via the AC outlet 72 to each unit of the notification broadcast receiver 70. The demodulating unit 73 is a demodulating unit that demodulates the notification broadcast signal transmitted from the center side, and outputs audio information to the audio switching unit 74 and outputs control information to the control unit 82. The audio switching unit 74 outputs the audio information output from the demodulation unit 73 to the audio recording unit 75 or outputs the audio information output from the demodulation unit 73 or the audio recording unit 75 to the volume adjustment unit 76. Means. The volume adjusting unit 76 adjusts the volume of the audio information output from the audio switching unit 74 and outputs it to the amplifier 77. The audio information is amplified by the amplifier 77 and then output from the speaker 78. The operation unit 79 is an operation unit for performing various operations on the notification broadcast receiver 70 and includes, for example, various switches (not shown). The display unit 80 is a display unit for displaying necessary information toward the user, and includes, for example, a monitor and a display lamp (not shown). The memory 81 is a storage unit that stores information necessary for various controls of the notification broadcast receiver 70. The control unit 82 is a control unit that controls each unit of the notification broadcast receiver 70 and includes, for example, a CPU (Central Processing Unit) (not shown) and a program that is interpreted and executed on the CPU. . Further, the notification broadcast receiver 70 includes a modulation unit 83 in addition to the same configuration as the conventional one. The modulation unit 83 is a modulation unit that modulates the audio information recorded in the audio recording unit 75 and sends it to the coaxial cable.

  FIG. 8 is a block diagram showing an electrical configuration of the fire detector according to the third embodiment. In the third embodiment, the fire detectors 100a to 100d are configured to include an input / output unit 101, a demodulating unit 102, an amplifying unit 103, and a changeover switch 104 in addition to the same configuration as the conventional one. . The input / output unit 101 includes a second filter 101b in addition to the filter 101a similar to that of the first embodiment. The second filter 101b is a bandpass filter having a pass frequency band different from that of the filter 101a, and allows the audio information output from the notification broadcast receiver 70 to pass therethrough. The demodulator 102 demodulates the audio information that has passed through the filter, and corresponds to the demodulator in the claims. The amplifying unit 103 is an amplifying unit that amplifies the audio information demodulated by the demodulating unit 102 to a predetermined level. The changeover switch 104 selectively switches and connects the voice alarm unit 42 or the amplification unit 103 to the speaker 43.

  In such a configuration, the notification broadcast signal modulated and output on the center side is received by the notification broadcast receiver 70 via the central control panel 30 of each dwelling unit, and is received by the demodulator 73 of the notification broadcast receiver 70. After being demodulated, the audio information included in the notification broadcast signal is output from the speaker 78 via the volume adjusting unit 76 and the amplifier 77. At the same time, the audio information is recorded in the audio recording unit 75 of the notification broadcast receiver 70. Thereafter, when the user performs a predetermined operation via the operation unit 79, or when the control unit 82 automatically determines that a predetermined output condition is satisfied, the voice recording is performed from the control unit 82. The control signal is output to the unit 75, and the audio information recorded in the audio recording unit 75 is output to the modulation unit 83. The modulation unit 83 modulates audio information and outputs the audio information to the coaxial cable c1 at a predetermined frequency f3 that is within the pass frequency band of the second filter 101b of the fire detectors 100a to 100d.

  This audio information is input to the mixing / distributing device 33 via the distribution mixer 91 and the coaxial cable c3 in this order, and further input to the fire detectors 100a to 100d of the rooms R1 to R4 via the serial units 34a to 34d and the like. The In each of the fire detectors 100a to 100d, the sound information passes through the second filter 101b, is demodulated by the demodulator 102, and then is amplified to a predetermined output level by the amplifier 103. In addition, the control unit 45 monitors the level of the signal passing through the filter 101b. If this level is equal to or higher than a predetermined value, the changeover switch 104 is switched to the dotted line side, and the amplification unit 103 is connected to the speaker 43. Connecting. Therefore, the audio information amplified by the amplifying unit 103 is output from the speaker 43. Thereby, even when the notification broadcast receiver 70 is not installed in each room of the dwelling unit, the notification broadcast can be output via the fire detectors 100a to 100d.

  In the third embodiment, as in the first embodiment, the interlocking operation between the fire detectors 100a to 100d is performed. For example, when a fire is detected by the interlocking fire detector 100a, the transfer signal is input to the interlocking fire detectors 100b to 100d and controlled via the filter 101a as in the first embodiment. Input to the unit 45. Here, the control unit 45 monitors a transfer signal and a response signal input to the control unit 45 via the input / output unit 101. When receiving the transfer signal, the control unit 45 The changeover switch 104 is switched to the solid line side in the figure, and the sound alarm unit 42 is connected to the speaker 43. Therefore, as in the first embodiment, a warning sound is output to the speaker 43 via the voice warning unit 42. Similarly, the response signals from the interlocking fire detectors 100b to 100d are input to the interlocking fire detector 100a and input to the control unit 45 via the filter 101a. And the control part 45 outputs the voice message to the effect of having received the response signal from a cooperation destination via the speaker 43. FIG.

  Furthermore, similarly to the notification broadcast output, the output from the intercom 90 can also be output via the fire detectors 100b to 100d. That is, when the interphone 90 is operated, the output of the interphone 90 is modulated by a modulation unit (not shown) provided in the interphone 90 and is within the range of the pass frequency band of the filter 101b of the fire detectors 100a to 100d. The signal is output through the coaxial cable c2 and the mixer 91 at a predetermined frequency f3. In this case, the output of the intercom 90 passes through the filters 101b of the fire detectors 100b to 100d and is demodulated by the demodulator 102 and is amplified by the amplifier 103, as in the case where the audio information is output from the notification broadcast receiver 70. Amplified and output from the speaker 43. As a result, even when no handset of the intercom 90 is installed in each room R1 to R4 of the dwelling unit, the output of the intercom 90 can be performed via the fire detectors 100a to 100d. If there is a concern about the collision between the audio information from the notification broadcast receiver 70 and the output of the interphone 90, the output of the interphone 90 is a frequency within the range of the pass frequency band of the filter of the fire detector. The output may be performed at a predetermined frequency f4 different from the frequency f3.

(Effect of this Embodiment 3)
As described above, according to the third embodiment, in addition to the same effect as the first embodiment, for example, in a recent house with excellent sound insulation, when a notification broadcast broadcast in another room cannot be heard. Even if it exists, since this notification broadcast can be output to each room via the fire detectors 100a to 100d, the number of expensive notification broadcast receivers 70 installed can be reduced as compared to the fire detectors 100a to 100d. Alternatively, the convenience can be enhanced by expanding the output range of the notification broadcast. In addition, even if no interphone 90 handset is installed in each room of the dwelling unit, the output of the interphone 90 can be output via the fire detectors 100a to 100d. The convenience can be enhanced by widening the output possible range of the intercom 90.

[Modification to each embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention are arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. be able to. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even if installation work for installing an alarm device is required for an existing transmission system using a communication cable, the installation work of the alarm device can be slightly reduced compared to the conventional case. Insofar as the object of the present invention has been achieved.

(About the overall configuration of the broadcasting system)
The overall configuration of the broadcast system can be arbitrarily changed unless otherwise specified. For example, a plurality of alarm devices and series units may be provided in one room. Alternatively, in addition to configuring the broadcast system as a notification broadcast system, it may be configured as an image receiving system for general dwelling units that receives TV signals via an antenna provided in each dwelling unit.

(About communication cables)
As a communication cable, besides a coaxial cable, an arbitrary communication cable for inputting or outputting a network signal to an arbitrary network device such as a personal computer, for example, a LAN cable can be used. In this case, the input / output unit can be configured in the same manner as a NIC (network interface card). For example, as illustrated in FIG. 9, the input / output unit 110 includes an interface (IF) 111 and an Ethernet IC 112 (Ethernet is a registered trademark). Then, the IP packet transmitted by the carrier sense multiple access / collision detection (CSMA / CD) method is received via the Ethernet IC 112 via the LAN cable according to TCP / IP. Address resolution and the like, and output to the control unit via the IF 111.

  The present invention can be applied to an installation structure for installing an alarm device that detects an abnormality in a monitoring area, and is useful for reducing the load of installation work of the alarm device.

It is a block diagram which shows the structure of the broadcasting system which concerns on Embodiment 1 of this invention. 1 is a block diagram conceptually showing an electrical configuration of a fire detector according to Embodiment 1. FIG. It is a figure which shows a frequency band. It is a timing chart of the interlocking communication of a fire detector. 6 is a block diagram illustrating a configuration of a main part of a broadcast system according to Embodiment 2. FIG. 10 is a block diagram illustrating a configuration of a main part of a broadcast system according to Embodiment 3. FIG. 10 is a block diagram illustrating an electrical configuration of a notification broadcast receiver according to Embodiment 3. FIG. It is a block diagram which shows the electrical structure of the fire detector which concerns on Embodiment 3. FIG. It is a block diagram which shows the electric constitution of the input-output part which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Broadcasting system 10 Center apparatus 11 Head end 20 Transmission system 21 Transmission line 22 Amplifier 23 Distribution amplifier 24 Divider 25 Security device 30 Centralized control panel 31, 70 Notification broadcast receiver 32, 90 Interphone 33, 64, Mixer divider 34a- 34d, 60a-60d Series unit 35a-35d TV
40a to 40d, 50a to 50d, 100a to 100d Fire detector 41 Sensor unit 42 Audio alarm unit 43, 78 Speaker 44, 80 Display unit 45, 82 Control unit 46, 101, 110 Input / output unit 46a Filter 71 Power supply unit 72 AC Outlet 73, 102 Demodulator 74 Audio switching unit 75 Audio recording unit 76 Volume control unit 77 Amplifier 79 Operation unit 81 Memory 83 Modulation unit 111 Interface (IF)
112 Ethernet IC
c, c1-c15 Coaxial cable R1-R4 Room

Claims (7)

An alarm device for detecting an abnormality in the monitoring area and issuing an alarm;
A communication cable for inputting or outputting a signal to a predetermined device other than the alarm device;
Input / output means for inputting or outputting a signal to the alarm device via the communication cable connected to the alarm device;
An alarm connection system comprising: The communication cable is a coaxial cable for inputting or outputting a TV signal to a TV receiver;
The alarm connection system according to claim 1. The communication cable is a network cable for inputting or outputting a network signal to a network device;
The alarm connection system according to claim 1. The input / output means is provided integrally with the alarm;
The alarm connection system according to any one of claims 1 to 3. The input / output means is provided integrally with a connection terminal unit constituting a connection terminal of a signal transmitted via the communication cable;
The alarm connection system according to any one of claims 1 to 3. The input / output means has band limiting means for passing only a signal of a predetermined frequency band input or output to or from the alarm device among signals input or output via the communication cable,
The alarm connection system according to any one of claims 1 to 5, wherein: The input / output means has a demodulating means for demodulating a modulation signal input or output via the communication cable to a predetermined device other than the alarm device;
The alarm connection system according to any one of claims 1 to 6, wherein:

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