JPH02302200A - Private loudening broadcast equipment - Google Patents

Abstract

PURPOSE:To cope with plural transmission channels by using transmission channels different from each other for main and local broadcast amplifiers provided with radio transmission functions and operating an automatic scan circuit for channel selection in accordance with the priority of a set reception channel. CONSTITUTION:A control part 34 to control a reception part 30 consists of a logic circuit which has a function to set a priority corresponding to the degree of importance of the reception channel and has control functions of illuminators 10 and 10, a radio receiver 18, etc. The highest priority is set for emergency broadcast and general broadcast from a main broadcast amplifier 3, and an indicator lamp 28 is flickered at the time of emergency broadcast reception. When the radio wave having a higher priority is received during broadcast, an equipment is automatically switched to broadcast the radio wave, therefore, information is surely transmitted. Since local broadcast and main broadcast are not simultaneously broadcasted, different from independent installation of a local broadcast equipment, broadcast contents are distinctly heard.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a public address system for public address broadcasting, and in particular, a system for wirelessly transmitting and receiving between a main broadcast amplifier and a plurality of loudspeakers,
The present invention relates to a local public address system that eliminates the need for wiring and is compatible with simultaneous broadcasts and local broadcasts using individual loudspeakers.

[Prior Art] Conventionally, a public address system for public broadcasting and emergency broadcasting in a building or a specific campus has a broadcasting amplifier installed in a broadcasting room or a disaster prevention center, a plurality of speakers placed at predetermined positions, It consists of a wiring cable that connects the two. Therefore, when constructing a building, etc. - Piping and wiring work is required in advance.

In addition, a speaker device that integrates a receiver and a speaker can be installed on a ceiling rosette for lighting, which is relatively easy to construct.
There has also been proposed a device that supplies power from the ceiling opening and receives radio waves wirelessly transmitted from the main broadcasting device. (Utility Model Application No. 6O-1 [Problem to be Solved by the Invention]) The conventional public address system in the premises described above requires piping and wiring work to be performed in advance during construction of a building, etc., and this work requires a large amount of cost. Furthermore, once installed, adding or relocating speakers requires additional wiring work, and wiring work inside existing ceilings and walls is difficult.

Since the main broadcast equipment broadcasts omnipotently and simultaneously, a separate loudspeaker system is required for local broadcasts such as calls to store counters, banks, and hospitals, which is a financial burden and requires additional construction work. This is causing aesthetic problems.

Furthermore, since the local broadcasting equipment and the local public address broadcasting equipment are separate systems, if they are broadcast at the same time, it will be difficult to hear and there will be a safety problem in the event of an emergency. Furthermore, the premises 1 public address system connected by cable has a high possibility of the cable being disconnected in the event of a disaster such as a fire (in which case there is a risk that it will not function as an emergency broadcast system).

Therefore, we have solved this problem by providing a public address system that facilitates installation by eliminating the need for wiring between the broadcast amplifier and speakers, improves reliability of operation in emergencies, and can also support local broadcasting. A technical problem to be solved arises, and it is an object of the present invention to solve this problem.

[Means for Solving the Problems] The present invention was proposed to achieve the above object, and consists of a loudspeaker in which a receiver and a power amplifier are connected to a speaker, and a main broadcaster each having a wireless transmission function. A local public address system comprising an amplifier and a local broadcast amplifier, wherein the transmission channels of the main broadcast amplifier and the local broadcast amplifier are different, and an automatic scanning circuit is provided in the receiving section of the loudspeaker, and the setting It is an object of the present invention to provide a horizontal loudspeaker broadcasting apparatus characterized in that it is provided with a control section that operates the automatic scanning circuit to perform channel selection according to the priority order of received channels.

[Operation] According to the present invention, the output of a main broadcast amplifier installed in a broadcasting room or the like is wirelessly transmitted by a transmitter, and is received and broadcast by a loudspeaker installed within the radio range of the transmitter.

The loudspeaker has an automatic scanning circuit and is provided with a control for setting the priority of the receiving channels. Therefore, it is possible to support a plurality of transmission channels, and receive not only the radio waves transmitted by the main broadcast amplifier but also other transmission channels.

A transmitter set to a transmission channel different from that of the main broadcast amplifier is used as a local broadcast amplifier, and is placed on each floor or in a specific area of the premises so that it can transmit to loudspeakers within the range of radio waves. For example, separate content can be broadcast on each floor using the local broadcast amplifier.

In addition, the priority order of reception channels can be set on the control unit installed in the loudspeaker, so if, for example, an emergency broadcast wave is transmitted from the main broadcast amplifier while receiving general broadcast or local broadcast, the emergency broadcast will be automatically activated. There is no problem with safety.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known technical matters will also be explained at the same time.

Figure 1 shows the public address system installed in the building ([1)].
FIG. 1 is an explanatory diagram showing 1). The public address system (+) has a main broadcast amplifier (3) installed in the broadcast room (2), and the output of the main broadcast amplifier (3) is connected to a cable ( C) is distributed to each floor.

The main broadcast amplifier (3) has a built-in storage battery (4) so as to be able to cope with power outages, and also has a control section that switches between general broadcast and emergency broadcast, and can be used with any arbitrary device such as a microphone (M) or a tape deck. It is configured to amplify the sound source and output it.

At the terminals (5) (5) (5) of the cable (C) (C) (C) distributed to each floor, there is a transmitter (6) (6) (6) that modulates the output of the main broadcast amplifier (3). is connected and transmits from the transmitting antennas (7) (7) (7) as a predetermined broadcast frequency. The transmitters (6), (6), and (6) are installed within the range where they can be received by loudspeakers (8), (8), etc., which will be described later.

The transmitter (6) (6) (6) is configured to switch the transmission channel between general broadcast and emergency broadcast by the control signal of the main broadcast amplifier (3), and uses a storage battery (9) (
9) Contains (9). On the other hand, loudspeakers (8) (8), etc. having a wireless reception function are arranged at predetermined positions on the ceiling of each floor. The loudspeakers (8), (8), etc. are formed integrally with the lighting equipment (Io, Qo), etc., making installation easy and eliminating the need for separate wiring and installation work.

Soshite, Q Q Q +) Q +) is a mobile local broadcasting amplifier, as shown in Figures 2 and 3.
A built-in microphone (12) and a switch (+'i) (+6) for a sound source such as a tape deck or record player connected to the connection terminal (4) are provided, and any sound source can be selected and transmitted from the transmitter (noga). In addition, a switch (n (g)) is installed that transmits an open/close signal for the switch of the radio receiver (day and lighting equipment (1o) Qo) of the loudspeaker (8) described later, and important operations can be performed wirelessly. Note that 01) in FIG. 3 is a control unit that amplifies and modulates audio signals and control signals for lighting equipment Oo), etc., (A) is a storage battery, and (C) is an antenna.

The loudspeakers (8), (8), etc. will now be explained with reference to FIGS. 4 and 5. In Figure 4, the loudspeaker (8) is installed near the periphery of the ceiling panel (b), which is a lighting fixture Qo)Q.
o)Qo)Qo) and a speaker (c) in the center.
, on the antenna), and a radio receiver (O, etc.) are installed.In addition, (2) is an emergency lighting device that lights up during a power outage, (A) is an indicator light that flashes to call attention during emergency broadcasts, ( g) is an earthquake sensor. Furthermore, a broadcasting circuit (A) consisting of a receiver (1), a power amplifier 01), etc., and an emergency storage battery (C) are built inside the ceiling panel (B).

Next, the operation of the loudspeakers (8), (8), etc. will be explained according to the circuit block diagram shown in FIG. Radio waves incident from the antenna (4) are demodulated at the receiving section (to) and sent to the control section (b).
The sound is output from the speaker (c) via the power amplifier C31). The receiving section (to) automatically repeats the scanning of the reception channels set by the automatic scanning circuit (c), and when it senses a channel, stops at that channel, and transmits the audio signal to the control section (c). ).

The control unit (B) that controls the reception unit (1) sets priorities according to the importance of the reception channels and controls the lighting equipment Qo.
) (+o)... and an indicator light (1) and a radio receiver (consisting of a logic circuit with a day control function.The priority order is set from the main broadcast amplifier (3) to the first place. The second place is the general broadcast from the main broadcast amplifier (3), which flashes the indicator light (A) when an emergency broadcast is received.The third place is the earthquake detection by the earthquake sensor (G). At the same time, the radio receiver (G) is turned on, and the radio broadcast earthquake information is set to be broadcast from the speaker (C).Then, the timer function based on the clock of the control unit (B) is used. The radio receiver (turns off after a predetermined period of time.The fourth place is local broadcasting amplifier 01)
The voice signal transmitted from the radio receiver (the channel for the switch opening/closing signal of the radio receiver (in addition, the lighting equipment co) The frequencies are different so that it can be turned on and off.

No matter which of the above-mentioned sound sources is being broadcast, when a radio wave with a higher priority is received, the system automatically switches to broadcasting that radio wave, thereby ensuring information transmission.

Unlike the case where a local broadcasting device is installed separately, the local broadcast and the main broadcast are not broadcast at the same time, so the broadcast content can be clearly heard.

On the other hand, the power source (1) for operating the loudspeaker (8) is a general commercial power source that is common to the lighting equipment Qo)Qo), and is supplied from an outlet circuit or a lighting circuit with a dedicated charging circuit. Switch circuit Cf of appliances (10) (10)...
/l and the charging circuit (a) for the emergency storage battery (c) are separated. Therefore, the charging circuit (to) of the emergency storage battery (to)
Since the lighting equipment (10) (10) is always energized except in the case of a power outage, there is no need for frequent charging and discharging by turning on and off the lighting equipment (10) (10). There is no risk of insufficient capacity or shortened battery life.In addition, in the event of a power outage, the emergency lighting circuit (b) will turn on the emergency lighting equipment (
6) and also supplies power to the broadcasting circuit (2).

Note that the arrangement of the emergency storage battery (c) should not be limited to this embodiment, and a separate storage battery compartment may be provided and power may be supplied through wiring from the storage battery compartment.

Therefore, this invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that this invention extends to such modifications.

[Effects of the Invention] Since the present invention is configured as detailed in the above-mentioned embodiment, wiring work between the main broadcast amplifier and the speaker is not required, and it is possible to perform omnipotent broadcasting, window call broadcasting, etc. Can support multiple broadcast sources. Therefore, there is no need to separately install a local broadcasting device, which reduces the economic burden, and also eliminates aesthetic problems associated with installing the local broadcasting device.

In addition, in tenant buildings, etc., it is possible to support local broadcasting using different sound sources for each usage category, and to automatically switch to the corresponding broadcast during emergency broadcasts or simultaneous broadcasts, so a separate local broadcasting device is installed. This has a remarkable effect on the ease of installation, economic efficiency, and functionality, such as improving the reliability of information transmission compared to the previous case.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, Fig. 1 is an explanatory diagram showing the installation state of the public address system in the premises, Fig. 2 is a slope view of the local broadcast amplifier, Fig. 3 is a circuit block diagram of the local broadcast amplifier, FIG. 4 is a perspective view of the loudspeaker, and FIG. 5 is a circuit block diagram of the loudspeaker.

Claims (1)

[Claims] A local public address broadcasting system comprising a loudspeaker in which a receiving unit and a power amplifier are connected to a speaker, and a main broadcasting amplifier and a local broadcasting amplifier each having a wireless transmission function, the main broadcasting amplifier and the local broadcasting amplifier transmitting signals. In addition to differentiating the channels, an automatic scanning circuit is provided in the receiving section of the loudspeaker, and a control section is provided that operates the automatic scanning circuit to select channels according to the set priorities of the receiving channels. Public address system.