JP3118188U - Emergency notification radio - Google Patents

Abstract

An emergency broadcast receiver and transmitter using community FM broadcasting are provided.
In an emergency notification FM radio, a wireless broadcast receiving means 101a for receiving a wireless FM broadcast, a network receiving means 101b for receiving an FM broadcast from a CATV network, a predetermined DTMF (Dial Tone Multi-frequency) emergency notification FM comprising detection means 111A, 111B for detecting a signal and sound output means for generating a high volume output even when the detection signal is supplied even when the radio is turned off. A radio and a switch that is inserted when performing emergency broadcasting, a disaster prevention room means having a microphone, and a signal generator connected to the disaster prevention room means and forming a predetermined DTMF signal by turning on the switch, A mixer for forming a signal obtained by mixing a DTMF signal and an audio signal from the microphone; Emergency notification transmitter equipped with a transmitting means for transmitting the output of the mixer as an FM radio wave.
[Selection] Figure 2

Description

  The present invention relates to an emergency broadcast transmission / reception device, and more particularly to an emergency notification FM radio and an emergency notification FM transmitter using community FM broadcasting.

  As a countermeasure against disasters, it is first necessary to conduct emergency public relations. And whether it is a natural disaster or not, disasters are limited to relatively small areas. Therefore, it is necessary to effectively notify the target area of information.

  Various means for notifying the occurrence of an emergency can be considered, but many are not necessarily appropriate. Outdoor loudspeakers do not receive sound indoors under strong winds, telephones are congested and difficult to connect, there are people who can not handle e-mail, wired broadcasting facilities are not installed much, The ones that use the Internet do not function due to troubles such as the center or power outages and require a terminal that is not cheap, the CATV network has limited receivers and expensive equipment, and the disaster prevention radio is an expensive facility is necessary.

  Compared to these, community FM broadcasting has various advantages. That is, it can be listened indoors without being affected by wind and rain, the facility and the receiving device can be formed inexpensively and easily, and it is difficult to become inoperable even in the event of a disaster.

  The present invention has been made in view of the above points, and an object thereof is to provide an emergency broadcast receiver and transmitter using community FM broadcasting.

In order to achieve the above object, in the present invention,
In emergency notification FM radio,
A wireless broadcast receiving means for receiving a wireless FM broadcast;
Network receiving means for receiving FM broadcast from a CATV network;
Detecting means for detecting a predetermined DTMF (Dial Tone Multi-Frequency) signal included in the FM broadcast;
An emergency notification FM radio comprising: an audio output means for generating a loud output even when the radio is turned off when a detection signal is given from the detection means;
I will provide a.

  As described above, since the present invention transmits and receives emergency broadcasts using community FM broadcasting as a medium, it is possible to achieve information transmission in an emergency that is closely related to the region and is resistant to disasters.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1

  FIG. 1 shows the configuration of the entire system according to the present invention, which is based on a so-called community FM broadcasting system. That is, an FM radio 100 is installed in each home, and in the illustrated case, FM broadcast via a CATV network can be received.

  On the other hand, the broadcasting station 200 sends an audio signal such as a microphone MIC, a compact disc CD, or the like from the transmission facility 201 to the transmission antenna 202 and transmits it as a radio wave. A DTMF signal generator 203 is connected to the transmission facility 201. When the switch SW is turned on in an emergency, a DTMF signal is preferentially sent to the transmission facility and emergency broadcasting is started.

  In addition, a DTMF signal can be input to the portable device 211 from a CD or MD as a sound source, and the DTMF signal can be sent to the transmission facility 201 via the receiver 12. As a result, the FM radio 100 can be turned on from a remote location via the transmission facility 201 and emergency information can be sent to the transmission facility 201.

  In the communication area, the FM radio 100 of each home is set to the reception frequency of the FM station, and the FM station 100 receives the FM station broadcast as a normal radio at all times. As a result, the operating state is switched so as to receive with a large volume output. However, the reception frequency of the FM radio 100 can be changed as necessary by using a semi-fixed system.

  FIG. 2 is a block diagram showing an embodiment of an FM radio for emergency broadcast reception according to the present invention. This FM radio always turns the power on and off and adjusts the volume so as to receive the FM station broadcast at an arbitrary volume when necessary. However, when a DTMF signal is transmitted by the same FM radio wave. The power is automatically turned on, and the emergency broadcast is switched to a high volume. In addition, it is possible to visually display that the broadcast is an emergency broadcast.

  In order to always receive emergency broadcasts, the power source has a rechargeable battery, and the rechargeable battery is always charged, so that the reception can be continued even if a power failure occurs due to a disaster. Then, after the emergency broadcast is received, when the return operation is performed by the OK switch or the return signal is received, the broadcast reception is returned to the arbitrary volume.

  The antenna includes a radio wave receiving antenna 101a and a cable television receiving F-type connector 101b. A reception signal of the radio wave receiving antenna 101 a is supplied to the FM tuner 104 via the switch 103, and a reception signal of the F-type connector 101 b is supplied to the FM tuner 104 via the filter 102.

  The radio wave receiving antenna 101a and the F-type connector 101b can be mechanically linked by a switch 103 so that the switch 103 can be turned on by pulling out the antenna 101a. Thereby, since the broadcast from any route can be received, the emergency broadcast can be received more reliably.

  The audio signal extracted by the FM tuner 104 is supplied to an amplifier 105 that is a volume adjustment circuit. When the switch 106a of the volume 106 with a switch is on, a signal having a volume determined by the setting position of the variable resistor 106b is generated from the amplifier 105. The data is sent to the speaker 107 which is a device.

  On the other hand, the detection signal of the FM tuner 104 is given to a tone detection device having DTMF determination devices 111A and 111B and DTMF setting switches 112A and 112B. Then, it is determined whether or not the detection signal from the FM tuner 104 is supplied to the DTMF determination circuit 111 and matches the start and stop DTMF setting signals preset by the DTMF setting switches 112A and 112B. . The DTMF setting switches 112A and 112B can set five digits by selecting five tones in a DTMF signal, for example, a telephone DTMF signal. In the case of FIG. 2, five tones are expressed as onomatopoeia and expressed as “pipopapapi” and “popipepeppa”.

  When the DTMF determination circuit 111A determines coincidence, the coincidence output is given to the holding circuit 113 to perform the holding operation, and the holding output is given to the emergency display circuit 115A, the illumination circuit 115B, the power-on switch 117, and the volume increase switch 118. As a result, the amplifier 105 is turned on and the signal is amplified at the maximum volume or the large volume, and the sound is output from the speaker 107. Further, the emergency display circuit 115A causes the red light emitting diode 116A to blink, and the illumination circuit 115B causes the light emitting diode 116B to blink and emit light continuously. At this time, the held output is also given to the external output terminal OUT, so that it can be taken out.

  That is, when a predetermined emergency broadcast is performed, the DTMF determination circuit 111A determines the coincidence and outputs the emergency broadcast from the speaker 107 at a large volume, and the operation of the emergency display circuit 115A and the light emission of the light emitting diode 116A caused thereby. The emergency broadcast is also displayed by the operation of the lighting circuit 115B and the flashing light emission of the light emitting diode 116B. Therefore, people at a certain distance from the receiving device can know that there is an emergency broadcast both by hearing and by vision.

  The light emitting diode 116A is red and is arranged so as to display the letters “emergency broadcast” or “emergency”. The light emitting diode 116B is basically for illumination, and a white one is used.

  The light-emitting diode 116B automatically emits continuous light after flashing light emission even during emergency broadcast reception, and ensures illuminance during emergency broadcast reception.

  When the emergency broadcast is finished, a stop DTMF signal is given from the FM tuner 104, and when the DTMF judging circuit 112B judges coincidence, a coincidence output is given to the holding circuit 113 to release the holding operation.

  At this time, the emergency display circuit 115A and the illumination circuit 115B are given a return signal from the acknowledge switch 114, and thus the light emitting diode 116A and the light emitting diode 116B are turned off.

  Further, after the emergency broadcast is received, if the OK switch 114 is operated, the holding circuit 113 is reset and no holding output is generated.

  Although this receiving device normally operates with power supplied from the commercial power source 120, the power supply circuit includes a rechargeable battery 122 in order to cope with an unexpected emergency broadcast. The rechargeable battery 123 is charged using the commercial power source 120, and can receive a broadcast for a predetermined time even if power supply from the commercial power source is stopped due to a disaster. Furthermore, a generator 119 is connected to the power line, and the generator 119 is driven by a manual handle 154. When the commercial power supply fails, the power failure detection circuit 121 gives a detection output to the illumination circuit 115B for a predetermined time to perform illumination by the light emitting diode 116B.

  Note that the illumination switch 115Bs is connected to the illumination circuit 115B, and the light emitting diode 116B can be turned on by the illumination switch 115Bs.

  FIG. 3 is a perspective view showing an appearance of the FM receiver 150 shown in FIG. As illustrated, the FM receiver 150 is housed in a case 151 that can be stationary and wall-mounted. The outer periphery of the case 151 includes a receiving antenna 101a, a CATV network connection connector 101b, a volume control knob with switch 106, a speaker 107, a reset switch 114, an illumination switch 115Bs, an emergency display light emitting diode 116A, and an illumination light emitting diode. 116B, a commercial power connection port 120 is attached.

  Then, hooks 152 and 153 for hanging the case are folded on the upper surface of the case 150, and a manual handle 154 for operating the generator is folded and accommodated in a recess formed in the lower part of the front.

  FIG. 4 is a block diagram showing an embodiment of an FM transmitter for emergency broadcasting according to the present invention. This apparatus includes, for example, a disaster prevention room apparatus 210 installed in a disaster prevention room of a local government, and a transmission apparatus 220 that transmits FM broadcasts based on an emergency broadcast signal from the disaster prevention room 210.

  The disaster prevention room apparatus 210 receives signals from the switch SW, microphone MIC, and external portable device 211 that are input when emergency broadcasting is performed, and enters the disaster prevention room apparatus 210 via a public line. A receiving receiver 212 is provided. The disaster prevention room device 210 is connected to the transmission device 220 via a line such as a telephone line. Further, a disk (CD, MD, etc.) can be used as a signal source.

  The transmission device 220 includes a DTMF signal generator 221 that forms a predetermined DTMF signal by turning on the switch SW, a mixer 222 that forms a signal obtained by mixing the DTMF signal from the DTMF signal generator 221 and an audio signal from the microphone MIC, A transmitter 223 and a transmission antenna 224 that transmit the output of the mixer as FM radio waves are provided.

  Since the disaster prevention countermeasure room device 210 and the transmission device 220 are facilities for emergency broadcasting, it is assumed that the power supply has been subjected to a power failure countermeasure.

  The DTMF signal generated by the DTMF signal generator 221 may be, for example, a combination of a plurality of tones using two or more single-tone chips, or a DTMF signal chip formed using a telephone DTMF signal chip. Good. The latter has fewer malfunctions than the former.

  FIG. 5 shows how transmission signals are switched during emergency broadcasting by the transmission apparatus 200 shown in FIG. When an emergency broadcast instruction is received from the authorities at time t1 due to the occurrence of an emergency situation, the normal broadcast signal is narrowed down, and the emergency broadcast is shifted to sandwiching the DTMF signal from time t2 to t3. When the emergency broadcast ends at time t4, the DTMF signal is transmitted until time t5, and the normal broadcast returns.

Explanatory drawing which shows the structure of one Embodiment of this invention. The block diagram which shows one Embodiment of the FM receiver for emergency broadcast reception which concerns on this invention. The perspective view which showed the external appearance of FM receiver 150 shown in FIG. The block diagram which shows one Embodiment of the FM transmitter for emergency broadcasts concerning this invention. 5 is a time chart showing how transmission signals are switched during emergency broadcasting by the transmission apparatus 200 shown in FIG. 4.

Explanation of symbols

100 receiver, 101a radio wave receiving antenna, 101b F-type connector,
102 filter, 103 switch, 104 FM tuner,
105 amplifier, 106 volume with switch, 107 speaker,
111 DTMF determination circuit, 112 DTMF setting switch,
113 holding circuit, 114 OK switch, 115A emergency display circuit,
115B lighting circuit, 115Bs lighting switch, 116 light emitting diode,
117 power on switch, 118 volume increase switch, 119 generator,
120 commercial power supply, 121 power failure detection circuit, 122 rectifier circuit,
123 rechargeable battery, 200 transmitter, 210 disaster prevention room equipment,
211 mobile devices, 220 transmitters, 221 DTMF signal generators,
222 mixer, 223 transmitter, 224 antenna device for radio wave transmission.

Claims (14)

In emergency notification FM radio,
A wireless broadcast receiving means for receiving a wireless FM broadcast;
Network receiving means for receiving FM broadcast from a CATV network;
Detecting means for detecting a predetermined DTMF (Dial Tone Multi-Frequency) signal included in the FM broadcast;
An emergency notification FM radio comprising: an audio output means for generating a high volume output even when the radio is turned off when a detection signal is given from the detection means. In the emergency notification FM radio according to claim 1,
The detection means detects at least two types of DTMF signals including a start signal and a stop signal,
The emergency notification FM radio in which the sound output means starts a high volume output operation in response to the start signal and stops in response to the stop signal. In the emergency notification FM radio according to claim 1,
An emergency notification FM radio provided with a return switch for turning off the power of the radio according to an operation, and the operation of the return switch is performed to stop the operation of the radio. In the emergency notification FM radio according to claim 1,
An emergency notification FM radio having a connector for connecting to the CATV network. In the emergency notification FM radio according to claim 1,
An emergency notification FM radio equipped with a hand-powered generator and used in combination with other power sources. In the emergency notification FM radio according to claim 1,
The reception means is an emergency notification FM radio in which a reception frequency is selected semi-fixed. In the emergency notification FM radio according to claim 6,
The reception means is an emergency notification FM radio whose reception frequency is semi-fixedly selected by a digital switch. In the emergency notification FM radio according to claim 1,
An emergency notification FM radio housed in a stationary and wall-mounted case. In the emergency notification FM radio according to claim 1,
Emergency notification FM radio with lighting means to illuminate the surroundings. In the emergency notification FM radio according to claim 9,
The illuminating means is an emergency notification FM radio which is turned on by a power failure and is turned on for a predetermined time. In the emergency notification FM radio according to claim 1,
An emergency notification FM radio with means for visually displaying that an emergency broadcast is being received when the emergency broadcast is received. The emergency FM radio according to claim 1,
The radio is an emergency notification radio that can receive normal broadcasts in addition to emergency broadcasts. Disaster prevention measures room means having a switch and a microphone that are inserted when performing emergency broadcasting,
Connected to the disaster prevention room means via a line, a signal generator that forms a predetermined DTMF signal by turning on the switch, and a signal that mixes the DTMF signal from this signal generator and the audio signal from the microphone is formed And an emergency notification FM transmitter comprising: a mixer that transmits the output of the mixer as an FM radio wave. The emergency notification FM transmitter according to claim 13,
An emergency notification FM transmitter having receiving means for receiving a signal from the outside and supplying the reception signal of the receiving means to the mixer.

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