JP2007013854A - Transmission/reception apparatus for emergency public-relations broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission/reception apparatus for performing emergency broadcasting as measures to cope with disasters by utilizing mini FM broadcasting. <P>SOLUTION: A reception apparatus includes an antenna 101a for receiving FM broadcasting waves and an F-shaped antenna 101b connectable to a cable television line, operates in a great output mode if a prescribed tone signal contained in a broadcasting signal is detected, so as to cancel the great output mode by operating a recovery switch. Flash lighting for emergency broadcasting is performed by illuminators 115, 116, and continuous lighting is performed by further operating the recovery switch. In a transmission apparatus for emergency public relations, a disaster prevention room device includes a switch SW and a microphone MIC to be turned on when performing emergency broadcasting, and the transmission apparatus is connected through a line to the disaster prevention room device. When the switch is turned on, a prescribed tone signal is formed, a signal mixed with an audio signal from the microphone is formed by a mixer and an output of the mixer is sent out as an FM broadcasting wave. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an emergency publicity broadcast transmission / reception apparatus, and more particularly to a transmission / reception apparatus using mini-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.

  Broadcasting is suitable as a publicity medium, but the target area is too wide for wide-area broadcasting. Publicity media suitable for relatively small areas include disaster prevention radio systems, cable television, and mini FM broadcasting stations.

  Although the disaster prevention radio system has excellent functions, it has a limited spread because it requires network preparation, the terminals and the like are expensive, and the legal procedure is complicated. Moreover, outdoor loudspeakers, electronic bulletin boards, etc. are almost useless under conditions of typhoons and heavy rains.

  On the other hand, cable television is extremely suitable for providing detailed information after a disaster, but it does not function when a power failure or wave breaks due to the collapse of a utility pole or the like.

  Compared to the above, since the mini FM station uses radio waves as a medium, it can be listened to by portable radio or car radio as long as it is broadcast.

  However, the power switch may be turned off or the tuning frequency may be shifted, and the public information may not be achieved.

  The present invention has been made in consideration of the above-described points, and an object of the present invention is to provide a transmission / reception device that performs emergency broadcasting as a disaster countermeasure using mini-FM broadcasting.

In order to achieve the above object, in the present invention,
An antenna device having an antenna for receiving FM broadcast radio waves and an F-type antenna connectable to a cable television line, an FM tuner for detecting a broadcast signal received by the antenna device, and a predetermined tone signal included in the broadcast signal A tone detection device that detects a tone and forms a tone determination signal; a holding operation that generates a holding output when the tone determination signal is applied; and a return that releases the holding operation of the holding circuit according to an operation A volume control circuit that outputs a signal obtained by adjusting the volume of the output signal of the FM tuner, operates in a large output mode when the holding output is given, and greatly amplifies and outputs the output signal; A sound generating device that emits sound in accordance with the output of the volume adjusting circuit, an emergency publicity receiving device, and an emergency broadcast A disaster prevention room apparatus having a switch that is turned on when performing the operation and a microphone that forms an audio signal, and a tone signal that is connected to the disaster prevention room apparatus through a line and forms a predetermined tone signal by turning on the switch A transmission device for emergency publicity, comprising a mixer for forming a signal obtained by mixing a tone signal from the tone signal generator and a sound signal from the microphone, and a transmission device for transmitting the output of the mixer as an FM radio wave,
Is to provide.

  As described above, the present invention transmits and receives emergency broadcasts using the FM receiver that automatically receives a large volume with a predetermined tone signal and the transmitter that performs FM emergency broadcast together with the predetermined tone signal. Highly responsive to and effective emergency public relations.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1

  FIG. 1 is a block diagram showing an embodiment of an FM receiver for emergency broadcast reception according to the present invention. This receiving device always turns the power on and off and adjusts the volume to receive a normal broadcast at an arbitrary volume when required. When switched on, it switches to reception at high volume. In addition, it is possible to visually display that it is an emergency broadcast.

  For this reason, the power source has a battery, and the battery is always charged, so that reception can be continued even if a power failure occurs due to a disaster. When a return operation is performed after receiving the emergency broadcast, the broadcast reception returns to the arbitrary volume.

  The antenna includes a radio wave receiving antenna 101a and an F-type antenna 101b connected to an F-type connector for cable television reception. The reception signal of the radio wave receiving antenna 101 a is directly supplied, and the reception signal of the F-type antenna 101 b is supplied to the mixing circuit 103 through the filter 102, and is supplied from the mixing circuit 103 to the FM tuner 104. 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 as a device.

  On the other hand, the detection signal of the FM tuner 104 is given to a tone detection device provided with a tone determination device 111 and a tone setting switch 112. Then, it is determined whether or not the detection signal matches the tone setting signal that is given to the tone determination circuit 111 and preset by the tone setting switch 112. The tone setting switch 112 can set five digits by selecting, for example, five of the telephone tone signals.

  When the tone determination circuit 111 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 lighting circuit 115, the power-on switch 117, and the volume increase switch 118. As a result, the amplifier 105 is turned on and the signal amplification is performed at the maximum volume or the large volume, and the sound is output from the speaker 107. In the lighting device, the lighting circuit 115 causes the light emitting diode 116 to flash. 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 tone determination circuit 111 performs a coincidence determination and outputs the emergency broadcast in loud sound from the speaker 107, and displays that the emergency broadcast is also performed by flashing the light emitting diode 116. . Therefore, people at a certain distance from the receiving device can know that there is an emergency broadcast both visually and auditorily.

  After the emergency broadcast is received, when the return switch 114 is operated, the holding circuit 113 is reset and no holding output is generated. At this time, since the switching signal is given to the illumination circuit 115 from the return switch 114, the light emitting diode 116 is switched from flash light emission to continuous light emission. In this state, the light emission of the light emitting diode 116 can be used as illumination. When the return switch 114 is operated again, a further switching signal is applied to the illumination circuit 114, the output of the illumination circuit 114 disappears, and the light emitting diode 116 is turned off.

  This receiver is equipped with a battery in the power circuit in order to cope with unexpected emergency broadcasts, and this battery is charged using a commercial power source. Even if power supply from the commercial power source stops due to a disaster, Broadcasting can be received for a predetermined time.

  FIG. 2 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 countermeasure room device 210 is provided with a switch SW and a microphone MIC that are turned on when emergency broadcasting is performed. The disaster prevention room device 210 is connected to the transmission device 220 via a line such as a telephone line.

  The transmission device 220 includes a tone signal generator 221 that forms a predetermined tone signal by turning on the switch SW, a mixer 222 that forms a signal obtained by mixing the tone signal from the tone signal generator 221 and the 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.

  Also for this antenna, both the radio wave antenna 224a and the F-type antenna 224b are preferably prepared. And since the disaster prevention countermeasure room apparatus 210 and the transmission apparatus 220 are facilities for emergency broadcasting, it is assumed that the power supply has been subjected to a power failure countermeasure.

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

Embodiment 2

  Since the emergency publicity receiving device according to the present invention is scheduled to be used in an emergency, it must be installed not only in a predetermined place in a room but also in various places, and is housed in a case that can be wall-mounted and stationary. It is desirable that

Embodiment 3

  In consideration of the fact that the emergency publicity receiving device according to the present invention can be used as long as possible by battery power supply in the event of a power failure, it is desirable that the power consumption of the device is small. Therefore, it is desirable that the FM tuner, the volume adjustment circuit, the tone detection circuit, the sound generation device, and the like be configured to be energy saving.

The block diagram which shows the structure of one Embodiment of the emergency broadcast receiver which concerns on this invention. The block diagram which shows the structure of one Embodiment of the emergency broadcast transmitter which concerns on this invention.

Explanation of symbols

101a Radio wave receiving antenna 101b F type antenna 102 Filter 103 Mixing circuit 104 FM tuner 105 Amplifier 106 Volume with switch 107 Speaker 111 Tone judgment circuit 112 Tone setting switch 113 Holding circuit 114 Return switch 115 Illumination circuit 116 Light emitting diode 117 Power on switch 118 Volume Increase switch 210 Disaster prevention room device 220 Transmitter 221 Tone signal generator 222 Mixer 223 Transmitter 224a Radio wave transmitting antenna device 224b F-type antenna

Claims (6)

An antenna device having an F-type antenna connectable to an antenna for receiving FM broadcast radio waves and a cable television line;
An FM tuner for detecting a broadcast signal received by the antenna device;
A tone detector for detecting a predetermined tone signal included in the broadcast signal and forming a tone determination signal;
A holding circuit that performs a holding operation when the tone determination signal is given, and forms a holding output;
A return switch for releasing the holding operation of the holding circuit according to the operation;
A volume adjustment circuit that outputs a signal obtained by adjusting the volume of the output signal of the FM tuner, operates in a large output mode when the holding output is given, and greatly amplifies and outputs the output signal;
A sounding device that emits sound according to the output of the volume control circuit;
An emergency publicity receiver. In the emergency public information receiving device according to claim 1,
The tone detector is
A tone setting means for selecting an arbitrary number of predetermined tone signals and forming a setting signal;
An emergency publicity receiving apparatus, comprising: a tone determination circuit that generates an output when the broadcast signal and the setting signal match. In the emergency public information receiving device according to claim 1,
An emergency information receiving apparatus, comprising: a lighting device that emits flash when a holding output of the holding circuit is given, the holding output disappears, and the light is continuously emitted when the return switch is operated. In the emergency public information receiving device according to claim 1,
The receiving apparatus for emergency public information, wherein the receiving apparatus is housed in a wall-mountable and stationary case. In the emergency public information receiving device according to claim 1,
At least one of the FM tuner, the volume control circuit, the tone detection device, and the sound generation device is an energy saving type receiver for emergency publicity. Disaster prevention room equipment having a switch and a microphone that are inserted when performing emergency broadcasting,
A tone signal generator connected to the disaster prevention room device via a line and forming a predetermined tone signal by turning on the switch, a signal obtained by mixing the tone signal from the tone signal generator and the audio signal from the microphone A transmitter for emergency publicity comprising a mixer to be formed and a transmitter for transmitting the output of the mixer as FM radio waves.

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