JPS63310234A - Disaster preventing administrative radio community reception system - Google Patents

Abstract

PURPOSE:To completely transfer information (disaster preventing information) transmitted by a disaster preventing administrative radio, to residents of reinforced concrete middle and high residence dwellers, by providing a disaster preventing receiver, a power source unit and a television community receiving facility, etc. CONSTITUTION:In the case of bringing a disaster preventing administrative radio wave (disaster preventing radio wave) to community receiving, first of all, the disaster preventing radio wave is caught by an exclusive antenna 1 and led to a disaster preventing receiver 2, and only when an area code contained in the disaster preventing radio wave has coincided, a power source unit 3 is started. As a result, a low frequency amplifier 4, a modulator 5 and a transformer 6, etc., are operated, and by a disaster preventing information signal of a low frequency which has been demodulated by the receiver 2, a high frequency carrier wave is brought to a frequency modulation. Subsequently, this modulated signal and a power source from the unit 3 are inputted to television receiver terminals provided separately, respectively through a mixer 93, a power injector 94 and the exclusive receiver 10 of a television community receiving facility 9. In such a way, by using an inexpensive and simple equipment, disaster preventing information can be brought to community reception satisfactorily in a room, as well with respect to residents of reinforced concrete middle and high residence dwellers houses, and its contents can be understood surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a community reception system using disaster prevention administrative radio.

(Prior technology) Disaster prevention administrative radio systems, which are being installed in various places in recent years, install reception slave stations at appropriate intervals, receive activation signal radio waves from the master station, activate the amplifiers of the slave stations, and transmit them outdoors. Information or warnings are communicated to residents through sound from installed loudspeakers.

Additionally, as a method to improve the drawbacks of this outdoor public address system, a method has been adopted in which a door-to-door receiver is installed in each door.

(Problems to be solved by the invention) The above-mentioned outdoor loudspeaker system is affected by external noise, cannot be heard during heavy rain, becomes difficult to hear due to wind direction, causes acoustic pollution in the vicinity of the loudspeaker, and suffers from sound wave interference. In the case of modern shutters and aluminum satsume fittings, it is difficult for sound waves to pass through (this is especially noticeable in mid-to-high-rise residential buildings), and areas behind buildings are difficult for sound waves to reach.

In addition, the method of installing a door-to-door receiver in each house is expensive, and modern mid-to-high-rise houses made of reinforced concrete block radio waves, so it is difficult to receive good reception with a door-to-door receiver installed indoors. Have difficulty.

Therefore, the purpose of this invention is to completely convey information transmitted by disaster prevention administrative radio (hereinafter referred to as disaster prevention information) to residents of reinforced concrete medium- and high-rise apartment buildings, which are expected to become popular in the future. With this in mind, we aim to provide a disaster prevention administrative radio joint reception system that improves the problems mentioned above.

(Means for Solving the Problem) In order to achieve this object, the disaster prevention administrative radio joint reception system, which is the first invention described in the present specification, provides a method for jointly receiving disaster prevention administrative radio waves. is captured by a dedicated antenna, and the captured signal is guided to a disaster prevention receiver.
The power supply device is activated only when the area code included in the disaster prevention radio waves and the area code possessed by the disaster prevention receiver match, and by activation of the power supply device, the low frequency disaster prevention information signal demodulated by the disaster prevention receiver is activated. A high-frequency signal is modulated, and the modulated high-frequency signal and the power source for starting the receiver are transmitted from the power supply device via a transformer to a mixer and a power injector in a TV common reception facility, which is installed in each of a plurality of homes. led to the disaster prevention receiver dedicated to the TV community reception facility.
This system is characterized by joint reception of disaster prevention information.

Furthermore, the disaster prevention administrative radio joint reception system, which is the second invention described in this specification, captures the disaster prevention administrative radio waves with a dedicated antenna and transmits the captured signals to the disaster prevention administrative radio waves in order to jointly receive the disaster prevention administrative radio waves. The power supply is activated only when the area code included in the disaster prevention radio waves matches the area code possessed by the disaster prevention receiver. A high-frequency signal is modulated with a frequency disaster prevention information signal, and the modulated high-frequency signal and the power source for starting the receiver are transmitted from the power supply device via a transformer to multiple sources via a mixer and a power injector in the TV common reception facility. In order to jointly receive disaster prevention information, the disaster prevention information can be reconfirmed by the dedicated disaster prevention receiver installed in each house. By switching the reception selection switch to rebroadcast,
A high frequency signal different from the high frequency signal is modulated with the low frequency disaster prevention information signal once stored in the storage device, so that it can be rebroadcast until after a set time of a timer included in the power supply device. It is something.

(Examples) The present invention will be described in detail below by way of examples with reference to the accompanying drawings.

FIG. 1 shows a block diagram of the configuration of an embodiment related to the joint reception system of the present invention.

This method first uses, for example, 60? l 11□ band disaster prevention administrative radio waves (hereinafter referred to as disaster prevention radio waves) are captured by the dedicated antenna 1, and the captured signals are guided to the disaster prevention receiver 2 of the slave station via a coaxial cable, and the signals included in the disaster prevention radio waves are The power supply device 3 of the slave station matching the area code is activated. At this time, the disaster prevention receiver is always turned on in preparation for the arrival of disaster prevention radio waves.

Next, when the power supply device 3 is activated, the low frequency amplifier 4, modulator 5, and transformer 6 start operating in the first invention described in this specification. The modulator 5 amplifies the low frequency disaster prevention information signal (for example, an audio signal) already demodulated by the disaster prevention receiver 2 with the low frequency amplifier 4, and uses this signal to transmit 76 to 90M.
The high-frequency carrier wave (r+) between H2 is frequency modulated, and its output is guided as a carrier disaster prevention information signal to the mixer 93 of the television common reception facility 9 via a coaxial cable or the like.

In addition, from the activated power supply device, for example, a 30V AC power source for the dedicated disaster prevention receiver 10 of the nine TV community reception facilities is superimposed on the coaxial cable via the power injector 94 of the TV community reception facility 9 and installed in each of the plurality of homes. power is transmitted to the TV terminal of the television receiver.

Therefore, AC30V, frequency-modulated carrier disaster prevention information signals, existing FM broadcast signals, and television broadcast signals are flowing through the TV common reception facility 9.
And the carrier disaster prevention information signal flows only when a disaster prevention radio wave is received and the disaster prevention radio wave matches the area code. When the end code of disaster prevention radio waves is received, radio wave emission is stopped, or the code signal is different from the area code of the slave station, AC3
0V and transport disaster prevention information signals are no longer inflowed.

A dedicated disaster prevention receiver 10 is directly connected to the terminal of each house in the television common reception facility. If there are any branch distributors etc. on the way, they should be of current passing type. Inside this dedicated disaster prevention receiver 10, AC30
V and the high frequency carrier disaster prevention information signal are separated and AC30
V is conveyed to the power supply circuit, and the disaster prevention information signal is applied to the high frequency input circuit. Therefore, only when a disaster prevention radio signal is received, the dedicated disaster prevention receiver 10 of each house is turned on, and the conveyance disaster prevention information signal is inputted, so that the disaster prevention information can be well received indoors and the contents can be grasped reliably.

A second invention described in this specification further includes a storage device 7 and a modulator 8 shown in the first figure as repetitive functions in addition to the first invention described above.
This is the addition of The modulator 8 transmits the carrier wave f2 at a frequency different from the carrier wave f by the modulator 5, and simultaneously transmits the frequency modulated wave of the carrier wave f1, but the input signal of the modulator 8 is stored in an endless tape recorder or the like. This is done via device 7.

Therefore, if you want to listen and confirm the contents of the disaster prevention administrative radio broadcast immediately after receiving the disaster prevention information signal at each house, you can change the reception selection switch of the disaster prevention receiver 10 to confirmation (rebroadcast) and memorize it. The disaster prevention information signal once stored in the device 7 can be received again. For this reason, the power supply device 3 is equipped with a start-up timer for an additional 30 to 60 minutes, or 24 minutes as necessary, after the disaster prevention administrative radio broadcast ends.
You can listen to rebroadcasts by changing the time, etc.

Further, when the disaster prevention dedicated receiver 10 receives the conveyance disaster prevention information signal, by lighting the disaster prevention dedicated receiver, if you come home from going out and the receiving light is on, you can switch the reception selection switch to confirm and receive the disaster prevention information signal. can be heard.

In addition, since the input voltage of the dedicated disaster prevention receiver 10 is amplified by the amplifier in the TV community reception facility 9, this receiver can be constructed with a simple circuit and is cheaper than a general disaster prevention door-to-door receiver. can be provided to By adopting an uninterruptible device for the power supply, it can be put into practical use even if the commercial power supply fails.

Finally, a simplified block diagram of the structure according to the present invention will be described with reference to FIG. 2.

When the disaster prevention receiver 2 receives the selection signal for that area, the power supply device is activated, and the ^cioov power source activates the low frequency amplifier 4. The output of this amplifier 4 is carried on the coaxial cable of the TV common reception facility, so if there is a branch/distributor etc. on the way, those branch/distributors etc. must use current passing type equipment, but Disaster prevention radio signals can be received only by the speaker 11 in each room.

(Effects of the Invention) As described above, by using the community reception system of the present invention, it is possible to eliminate various drawbacks that have arisen in the conventional disaster prevention administrative radio community reception system, and it is possible to eliminate the various drawbacks that have arisen with the conventional disaster prevention administrative wireless reception system. A low-order and simple disaster prevention receiver for communal reception facilities can be used, and disaster prevention information signals can be received at the appropriate timing and well even in the rooms of reinforced concrete medium- and high-rise apartment buildings, and the contents can be accurately grasped. Can be done.

[Brief explanation of the drawing]

FIG. 1 shows a block diagram of the configuration of an embodiment related to the system of the present invention. FIG. 2 shows a block diagram of a modified example of the configuration. 1.91...Receiving antenna 2...Disaster prevention receiver 3
...Power supply device 4...Low frequency amplifier 5.8
... Modulator 6 ... Transformer 7 ... Storage device 9 ... Television common reception facility 92 ... Head amplifier 93 ... Mixer 94 ... Power injector

Claims (1)

[Scope of Claims] 1. In jointly receiving disaster prevention administrative radio waves, the disaster prevention administrative radio waves are captured by a dedicated antenna, the captured signals are guided to a disaster prevention receiver, and the area included in the disaster prevention radio waves is transmitted. Only when the code and the area code of the disaster prevention receiver match, the power supply device is activated, and by activation of this power supply device, the high frequency signal is modulated with the low frequency disaster prevention information signal demodulated by the disaster prevention receiver, and the high frequency signal is modulated. The high-frequency signal and the power source for starting the receiver from the power supply device via the transformer are connected to the disaster prevention receiver dedicated to the TV community reception facility installed in each of the multiple homes through the mixer and power injector of the TV community reception facility. A disaster prevention administrative radio joint reception system characterized by the joint reception of disaster prevention information. 2. When jointly receiving disaster prevention administrative radio waves, the disaster prevention administrative radio waves are captured by a dedicated antenna, the captured signal is guided to a disaster prevention receiver, and the area code included in the disaster prevention radio waves and the disaster prevention receiver are The power supply is activated only when the area codes of the power supply match, and by activation of the power supply, a high frequency signal is modulated with the low frequency disaster prevention information signal demodulated by the disaster prevention receiver, and this modulated high frequency signal and the power supply are The power supply for starting the receiver via the transformer is guided from the device to the disaster prevention receivers dedicated to the TV community reception facility installed in each of the multiple homes through the mixer and power injector of the TV community reception facility, and disaster prevention information is transmitted. In order to jointly receive the disaster prevention information and to reconfirm the disaster prevention information with the dedicated disaster prevention receiver for each house, by switching the reception selection switch of the dedicated disaster prevention receiver to rebroadcast, the disaster prevention information that has been temporarily stored in the storage device is A disaster prevention administrative radio joint reception system characterized in that a high frequency signal different from the high frequency signal is modulated with a low frequency disaster prevention information signal so that rebroadcasting can be performed until after a set time of a timer included in the power supply device. 3. In the system according to claim 2, the dedicated disaster prevention receiver is provided with a disaster prevention signal reception light, and the reception light is turned on when the disaster prevention information signal is received. A distinctive feature of the disaster prevention administrative radio joint reception system.