JP2017130774A - Outdoor stand-alone type broadcast loudspeaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel and useful outdoor stand-alone type broadcast loudspeaker device which is an outdoor stand-alone type and can be easily installed by utilizing an existing receiver like a household disaster prevention administrative radio receiver.SOLUTION: The outdoor stand-alone type broadcast loudspeaker device is configured by fitting a solar panel 29, a dedicated antenna 33, a speaker 35 and a control box 7 in which a receiver or the like is accommodated, to a pole 5 that is set up on the ground. The control box 7 includes a control board or an external loudspeaker amplifier and, when the receiver receives disaster prevention administrative radio audio broadcasting, outputs the audio broadcasting from the speaker. The device comprises a function for switching the external loudspeaker amplifier that is normally on standby in a silent state, to ON/OFF, and a function for regulating an audio voltage at the side of the receiver, thereby implementing broadcasting easy to listen even if the receiver is a household receiver or a disaster prevention radio or delivered from any sales agency.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an outdoor broadcast loudspeaker, and more particularly to an outdoor self-contained broadcast loudspeaker that can play a predetermined broadcast with a simple configuration.

The Japan Meteorological Agency uses the nationwide instantaneous warning system (common name: J-ALERT) to broadcast emergency warnings on television, and emergency warnings are also transmitted from the system to the main points of the local government. When an emergency alert is transmitted, the information is sent to the residents using disaster prevention administrative radio equipment.
There are so many earthquakes that Japan is said to have entered the period of seismic activity, and the importance of transmitting information about earthquakes and tsunamis is higher than before.
Therefore, even if you try to install the outdoor public address branch of the disaster prevention administrative radio where necessary, the installation will be large due to troublesome wiring work, and from the viewpoint of securing power supply However, there are many districts where it is difficult to secure the installation location.

In these districts, the local government urges residents to lend receivers to their homes and put them in the room, but it is rare that the loan is completely free, and there may be a financial burden on the residents. Many. In addition, the disaster prevention radio receivers of local governments include not only emergency broadcasts but also various information such as notifications of missing persons and items that encourage children to return home in the evening. However, even if they are placed indoors, they may turn off their power and miss important disaster prevention broadcasts.
Recently, use of disaster prevention radio has been proposed instead of a door-to-door receiver, and if this disaster prevention radio is used, so-called normal radio broadcasts (AM / FM broadcasts) can be heard, which increases convenience. However, many people still feel annoyed by forced broadcasting.
In addition, the above-mentioned door-to-door receiver and disaster prevention radio are for indoor use, and it cannot be denied that relying on them alone makes the aspect of alerting disaster prevention broadcasts to residents outside the country.

  The present invention has been made paying attention to the above-mentioned conventional problems, and is easily constructed by utilizing an indoor receiver such as a door-to-door receiver or a disaster prevention radio as a stand-alone outdoor receiver. It is an object of the present invention to provide a new and useful outdoor self-contained broadcasting loudspeaker.

  The present invention has been made to solve the above-mentioned problems, and the invention of claim 1 is an outdoor self-supporting broadcast loudspeaker constructed by incorporating a receiver that converts a broadcast radio wave and outputs a sound signal. A solar panel, a solar panel, a battery that stores electricity generated by the solar panel, an antenna that receives broadcast radio waves and sends it to the receiver, an external loudspeaker amplifier, A loudspeaker for amplifying and broadcasting the audio signal from the receiver amplified via the external loudspeaker amplifier; and a control unit for turning on and off the external loudspeaker according to the start / end of the output of the audio signal from the receiver; A volume adjustment unit that adjusts the volume by adjusting the voltage of the audio signal; and a housing that houses the receiver, and is limited to the type of receiver that is housed in the housing. Without a outdoors freestanding broadcasting loudspeaker system, characterized in that it is automatically loudspeaker broadcasts sound signal riding on airwaves the battery as a power source from the speaker.

  According to a second aspect of the present invention, in the outdoor self-contained broadcast loudspeaker according to the first aspect, the volume adjusting unit includes a fixed voltage divider that divides the voltage of the audio signal with a fixed resistor, and a variable voltage divider that divides the voltage with a variable resistor. An outdoor self-contained broadcast loudspeaker comprising an insulating transformer interposed between the voltage dividers.

  According to a third aspect of the present invention, in the outdoor self-contained broadcast loudspeaker according to the first or second aspect, the control unit outputs an ON signal when detecting the output of the audio signal, and outputs an OFF signal when detecting the end of the output. When the ON signal is received, the power supply to the external loudspeaker amplifier is turned on. When the OFF signal is received, the switching function for turning off the power supply and the input timing of the OFF signal to the switching function are delayed. An outdoor self-contained broadcast loudspeaker having a delay function.

  According to a fourth aspect of the present invention, there is provided the outdoor self-contained broadcast loudspeaker according to the third aspect, wherein the control unit is constituted by a microcomputer.

  According to a fifth aspect of the present invention, in the outdoor self-contained broadcast loudspeaker according to any one of the first to fourth aspects, either a door-to-door receiver or a disaster prevention radio can be arbitrarily selected as a receiver. It is an outdoor self-supporting broadcast loudspeaker.

  A sixth aspect of the present invention is the outdoor self-contained broadcasting loudspeaker according to any one of the first to fifth aspects, wherein a hand microphone is also connected to the external loudspeaker amplifier, and the loudspeaker is activated even if sound is input from the hand microphone. An outdoor self-contained broadcast loudspeaker characterized by being broadcast.

According to the outdoor self-contained broadcasting loudspeaker of the present invention, it can be easily constructed in a self-supporting manner outdoors by utilizing an indoor receiver.
The individual receivers are manufactured by a plurality of manufacturers, and the audio voltage (= output voltage) varies depending on the specification (impedance) of the speaker output terminal as well as the size. This is also true for disaster prevention radio. Moreover, the impedance differs greatly between the speaker output terminal of the door-to-door receiver and the earphone jack of the disaster prevention radio. On the other hand, constructing a loudspeaker indoors that is tailor-made to accommodate these differences is not “simple construction”.
On the other hand, according to the outdoor self-contained broadcast loudspeaker of the present invention, it has a uniform configuration without being influenced by the above-mentioned circumstances on the receiver side, and in addition, an easy-to-listen broadcast can be realized.

It is the front view and side view of an outdoor self-supporting broadcast loudspeaker according to an embodiment of the present invention. It is a figure which shows the state which closed the door of the control box of FIG. It is a figure which shows the state which opened the door of the control box of FIG. It is an electrical block diagram regarding the battery function part of the outdoor self-supporting broadcasting loudspeaker of FIG. It is an electrical block diagram regarding the broadcast function part of the outdoor self-supporting type broadcast loudspeaker of FIG. It is an electrical block diagram of the audio | voice detection part of FIG. It is an electrical block diagram of the volume adjustment part of FIG.

An outdoor self-supporting broadcast loudspeaker 1 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in this outdoor self-supporting broadcast loudspeaker 1, a pole 5 is integrally erected on the base portion 3, and after foundation work is performed on the installation ground, it is fixed with anchor bolts. Is set up on the ground. Therefore, it is easy to change the installation location. This pole 5 is quite high and its height is 7m.

A control box (housing) 7 is attached near the ground of the pole 5. As shown in FIGS. 2 and 3, the control box 7 includes a housing portion 9 that is attached to the pole 5 and a door 11 that closes the front opening side.
As shown in FIG. 2, a door handle 13 is provided on the surface of the door 11, and a key is inserted into the keyhole 15 and locked.

  As shown in FIG. 3, when the door 11 is opened, a lock mechanism 17 that operates in conjunction with the door handle 13 is attached to the back surface of the door 11. In addition, a storage battery 19 is installed in the housing portion 9. The storage battery 19 has a built-in charge controller 21 (FIG. 4). On the upper side of the battery 19 for storage, a case 23 containing a detection / control system component to be described later is installed. An external loudspeaker amplifier (AMP) 25 is installed on the right side of the case 23. A hand microphone 27 is connected.

As shown in FIG. 1, a solar panel 29 is attached to the upper side of the pole 5. A bird guard 31 is fixed on the solar panel 29.
A dedicated antenna 33 is attached to the upper side of the solar panel 29. In the case of exclusive use, the length in the vertical direction is about 2.5 m. However, as described above, the pole 5 is as high as 7 m. There is no such thing as touching it to injure you. The reception sensitivity is improved by using the dedicated antenna 33.
A plurality of speakers 35 are attached to the upper end of the pole 5.
Although not shown, the cable connecting the solar panel 29 and the like is drawn into the control box 7 and is electrically connected to the components housed therein.

The outdoor self-contained broadcast loudspeaker 1 has the above-described external configuration, and has an equipment specification of a wind resistant speed of 60 m / s.
The outdoor self-contained broadcasting loudspeaker 1 includes motorized main functions, including those that can be confirmed on the outside, and the case 23 includes components for operating the loudspeaker 1 together with the receiver. Is contained.

Among the receivers, reference numeral 37 denotes a door-to-door receiver, which is a dedicated receiver that receives only radio waves of disaster prevention administrative radio. It is assumed that the local government will distribute it to the residents.
The individual receiver 37 functions independently when supplied with power, and has a reception function and a broadcast function.
The individual receiver 37 has an attached internal antenna, but since it is housed in the case 23, the antenna connector of the dedicated antenna 33 (FIG. 1) is provided in the case 23 in order to ensure a stable reception state. The door-to-door receiver 37 in the case 23 is connected thereto.
Moreover, although the power source of the door-to-door receiver 37 is normally a dry battery, since the solar power generation is used, the dry battery is unnecessary.

Among the receivers, reference numeral 39 denotes a disaster prevention radio. The disaster prevention radio 39 has the same function as the door-to-door receiver 37 and can also select other stations.
Instead of the door-to-door receiver 37, the disaster prevention radio 39 can be housed in the case 23 and used.
Depending on the local government, there are places where individual receivers are used, and there are places where disaster prevention radio is used. However, in this outdoor self-supporting broadcast loudspeaker 1, both can be used as the output side of the audio signal as described above.
Moreover, even if it is generally called a door-to-door receiver, the size varies slightly depending on the manufacturer, and the same can be said for the disaster prevention radio, but the storage space of the case 23 is compatible with existing various door-to-door receivers and disaster prevention radio. Both can be stored.

The above-described receivers 37 and 39 are supplied with power from a power circuit described later. The power supply circuit is variable in a wide range of 1.5 to 9 V, and can handle each of a plurality of types of receivers.
Therefore, the receivers 37 and 39 normally stand silent when the power switch (not shown) is turned off, and turn on the forced broadcast switch when receiving the radio wave of the disaster prevention administrative radio from the dedicated antenna 33. This will force the broadcast.

Hereinafter, the configuration and operation of the components will be described in detail for each function.
<Battery function section: Fig. 4>
Reference numeral 41 denotes a control board, and each function is realized with the control board 41 as a center.
Electricity generated by daylight sunlight in the above-described solar panel 29 (FIG. 1) is stored in the storage battery 19 and a 12V power supply is formed, and the power is supplied to the power supply circuit 43 of the control board 41. From there, it is supplied to each part.

The power supply circuit 43 is provided with a voltage monitoring circuit 45 constituted by a comparator circuit for monitoring the fluctuation of the terminal voltage. When the voltage becomes 11V or less, the battery voltage drop alarm buzzer 47 is sounded. Although not shown, this alarm buzzer 47 is arranged on the front side of the control box 7 and can be heard by a person outside without opening the control box 7.
As described above, since it is configured to operate with an independent power source, it can be installed in any place without worrying about the power source. In addition, since the battery 19 for storage is used, a broadcast function described later works even at night.

<Aloud Broadcasting Department: Fig. 5>
[Disaster prevention radio broadcast]
The audio signals output from the receivers 37 and 39 are sent to the audio signal line 49 and output through to the external loudspeaker amplifier (AMP) 25 (FIG. 5).
The voice detection signal line 51 extends from the voice signal line 49, and the voice signal detection circuit 53 is interposed in the voice detection signal line 51.
The audio signal detection circuit 53 is also supplied with power from the power supply circuit 43 described above.
In the audio signal detection circuit 53, as shown in FIG. 6, the audio detection signal output from the audio detection signal line 51 is first rectified by the full-wave rectifier circuit 53A, and a frequency component higher than a predetermined value is removed by the low-pass filter 53B. Is done. Then, the voltage is adjusted by, for example, 1 to 20 times by the input voltage adjusting circuit 53C.

  Then, it is input to the main detection circuit. The main detection circuit is divided into two branch lines 55 and 65, and a signal is input from one branch line 55 to an ON detection circuit 57 that detects the output of an audio signal. The ON detection circuit 57 includes a comparator, and generates and outputs an ON signal when the set receiver ON voltage level is exceeded. This ON signal is supplied as a drive signal to the switching circuit (power high side circuit) 61 via the RS latch circuit 59, and opens the power supply line 63 from the power circuit 43 to the external loudspeaker amplifier (AMP) 25. An external loudspeaker amplifier (AMP) 25 is driven.

A signal is input from the other branch line 65 to an OFF detection circuit 67 that detects the end of the output of the audio signal. The OFF detection circuit 67 includes a comparator and a capacitor, and generates and outputs an OFF signal when a set receiver OFF voltage level is exceeded.
This OFF signal is also input to the RS latch circuit 59 in the same manner as the ON signal. When the ON signal is input, the RS latch circuit 59 is electrically held and continues to drive the external loudspeaker amplifier (AMP) 25. When this OFF signal is input, the self-holding state is released. Therefore, no control signal is output from the RS latch circuit 59, and the switching circuit 61 shuts off the power supply line 63, so that the external loudspeaker amplifier (AMP) 25 is stopped.

Reference numeral 69 denotes a timer circuit. The timer circuit 69 uses a time constant of a capacitor and a resistor as a timer time, and can be adjusted in 5 to 15 sec. The timer circuit 69 starts counting when the trigger signal is input, and outputs a signal when the set time is exceeded.
The timer circuit 69 is interposed in the voice detection signal line 51 described above, and uses an OFF signal as a trigger. Due to the interposition of the timer circuit 69, even if the sound is interrupted during the broadcast, the ON / OFF operation is not performed, so that a load is not applied to the circuit.
Since the reset signal line 71 is connected to the timer circuit 69, when the ON signal is output, the reset signal is input to the timer circuit 69 and the count is reset.

  In the above configuration, the control board 41 as the control unit, the ON detection circuit 57 and the OFF detection circuit 67 as the voice detection circuit, the RS latch circuit 59 as the self-holding switching unit, and the timer circuit 69 having a reset function. When the dedicated antenna 33 starts to receive radio waves for disaster prevention administrative radio, the external loudspeaker amplifier (AMP) 25 is turned on, and the content is automatically loudspeaked from the speaker 35. When the broadcast is completed, the external loudspeaker amplifier (AMP) 25 is turned off.

In the above, the ON / OFF control unit 73 is configured by a circuit such as the ON detection circuit 57. Instead of incorporating various circuits, the ON / OFF control unit 73 is mounted on a substrate with a microcomputer (PIC). It is also possible to configure.
When using a microcomputer (PIC) and changing settings such as changing the timer time, it is necessary to burn a new program into the microcomputer, but this is easier than reworking the circuit. This is an advantage.

  Note that a hand microphone 27 is also connected for broadcasting, but an AMP that forcibly turns on the external loudspeaker amplifier (AMP) 25 so that the hand microphone 27 can be used independently of the disaster broadcast broadcasting. A forced drive switch 75 is provided. This switch 75 is a manual operation type. When the hand microphone 27 is used, the switch 75 is turned on once it is pressed once.

In addition, a volume adjustment unit 77 is interposed between the audio signal line 49 and the external loudspeaker amplifier (AMP) 25.
Both the door-to-door receiver 37 and the disaster prevention radio 39 automatically broadcast at maximum volume when emergency information is received, even when the power is off, or even if other stations are selected in the case of the disaster prevention radio 39 Are common.

  However, the sound voltage differs between the door-to-door receiver 37 and the disaster prevention radio 39 due to the difference in the specifications of the output terminals, and the voltage corresponding to the maximum volume varies depending on the manufacturer regardless of what is classified as the door-to-door receiver 37. is there. This is also true for the disaster prevention radio 39. In addition, disaster prevention radio broadcasts are broadcast through the center set up in the government office and fire department, but the center can adjust the volume, and the content of the broadcast also encourages children to return home in the evening, as described above. In many cases, the volume is actively changed depending on the broadcast content. For this reason, in the standby state, the setting of the audio voltage is mixed, and the person in charge is not able to grasp the situation.

Therefore, the audio signal based on the various audio voltages on the receiver 37, 39 side is sent to the external loudspeaker amplifier (AMP) 25 only by performing installation work at the site and outputting the audio signals from the receivers 37, 39 through. As a result, sound cracking or conversely sound leakage occurs.
For this reason, a volume adjusting unit 77 is provided so that an audio signal whose audio voltage is automatically adjusted is sent to the external loudspeaker amplifier (AMP) 25 without being conscious of the audio voltage on the receivers 37 and 39 side. It has been devised.

In the sound volume adjustment unit 77, first, an audio signal is input to the fixed voltage divider 79. In the fixed voltage divider 79, the audio voltage is divided at a predetermined voltage dividing ratio by two resistors R1 and R2 (R1> R2) connected in series, and the voltage value at the voltage dividing point in between is divided. Output value.
Then, in order to stabilize the audio signal divided by the resistor, it is connected to the variable voltage divider 83 side via the insulating transformer 81.
The variable voltage divider 83 is configured by a volume (VR), and can be finely adjusted manually. The impedance is set to 600Ω corresponding to the input using the dynamic microphone.

The output impedance of the door-to-door receiver 37 is 4 to 16Ω, and the output impedance of the disaster prevention radio 39 is 2kΩ or more, which is quite different, but even if it is used without being aware of which type of receiver is housed, Further, even if the volume is adjusted at the center, the occurrence of sound cracking is prevented by passing through the volume adjusting unit 77 described above. If it is the audio voltage level of the individual receiver 37, it is mainly adjusted by the fixed voltage divider 79. However, in the case of the disaster prevention radio 39 having a high audio voltage, it is finally suitable for amplifier input by using the volume (VR). It will be dropped to voltage.
By finely reducing the volume (VR), it is possible to set an appropriate range in which sound is not broken and sound is not leaked.

With the above configuration, regardless of which of the indoor receivers 37 and 39 is selected, the installation work of the pole 5 or the like is performed, and further, the selected receiver is housed in the case 23 and the wiring work is performed. The broadcast loudspeaker 1 can be constructed, and since it is an independent power source, it does not matter where it is installed.
Further, since the receivers 37 and 39 are housed in the locked control box 7, there is no fear of theft.
Therefore, it is highly convenient as a base station for disaster prevention administrative radio.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.
For example, the receiver only needs to be capable of silent standby. For example, a dedicated application is installed on a smartphone, for example, an iPhone (registered trademark) manufactured by Apple Inc., and a specific broadcast is performed using Wi-Fi. It may be configured to receive only radio waves.

DESCRIPTION OF SYMBOLS 1 ... Outdoor self-supporting broadcasting loudspeaker 3 ... Base part 5 ... Pole 7 ... Control box 9 ... Accommodating part 11 ... Door 13 ... Door handle 15 ... Key hole 17 ... Lock mechanism 19 ... Battery for storage battery 21 ... Charge controller 23 ... Case 25 ... external loudspeaker amplifier (AMP) 27 ... hand microphone 29 ... solar panel 31 ... bird guard 33 ... dedicated antenna 35 ... speaker 37 ... door-to-door receiver 39 ... disaster prevention radio 41 ... control board 43 ... power supply circuit 45 ... voltage monitoring circuit 47 ... Alarm buzzer 49 ... Audio signal line 51 ... Audio detection signal line 53 ... Audio signal detection circuit 53A ... Full wave rectification circuit 53B ... Low-pass filter 53C ... Input voltage adjustment circuit 55 ... Branch line 57 ... ON detection circuit 59 ... RS latch Circuit 61 ... Switching circuit 63 ... Power supply line 65 ... Branch line 67 ... OFF detection circuit 69 ... Timer circuit 71 ... Reset signal line 73 ... ON / OFF control unit 75 ... AMP forced drive switch 77 ... Volume adjustment unit 79 ... Fixed voltage divider 81 ... Insulation transformer 83 ... Variable voltage divider (volume)

Claims (6)

In an outdoor self-contained broadcast loudspeaker constructed by incorporating a receiver that converts a broadcast radio wave and outputs an audio signal,
A solar panel, a battery that accumulates electricity generated by the solar panel, an antenna that receives broadcast radio waves and sends it to the receiver, an external loudspeaker amplifier, and the external A speaker for amplifying and broadcasting a sound signal from the receiver amplified via a sound amplifier; a control unit for turning on / off the external sound amplifier in accordance with the start / end of output of the sound signal from the receiver; A volume adjustment unit that adjusts the volume by adjusting the voltage of the audio signal; and a housing that houses the receiver;
Without being limited to the type of receiver housed in the casing, the outdoor self-contained broadcast loudspeaker is characterized in that an audio signal riding on a broadcast radio wave is automatically loudspeaked from the speaker using the battery as a power source. . In the outdoor self-supporting broadcast loudspeaker according to claim 1,
The volume control unit is composed of a fixed voltage divider that divides the voltage of the audio signal with a fixed resistor, a variable voltage divider that divides the voltage with a variable resistor, and an insulating transformer interposed between the voltage dividers. An outdoor self-contained broadcast loudspeaker characterized by In the outdoor self-supporting broadcast loudspeaker according to claim 1 or 2,
The control unit outputs an ON signal when the output of the audio signal is detected, and an audio detection function that outputs an OFF signal when the end of the output is detected, and turns ON the power supply to the external loudspeaker amplifier when receiving the ON signal, An outdoor self-contained broadcast loudspeaker comprising a switching function for turning off the power supply when a signal is received, and a delay function for delaying an input timing of an OFF signal to the switching function. In the outdoor self-supporting broadcast loudspeaker according to claim 3,
An outdoor self-contained broadcast loudspeaker characterized in that the control unit is composed of a microcomputer. In the outdoor self-supporting broadcast loudspeaker according to any one of claims 1 to 4,
As a receiver, either a door-to-door receiver or a disaster prevention radio can be arbitrarily selected. In the outdoor self-supporting broadcast loudspeaker according to any one of claims 1 to 5,
A handheld microphone is also connected to the external loudspeaker amplifier, and the outdoor self-contained broadcast loudspeaker is capable of performing loudspeaking broadcasting even when sound is input from the hand microphone.

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