JP2000038131A - Wireless broadcasting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently make an indoor broadcast with no volume change from an optional position in a train by connecting all wireless receivers and wireless control devices in the train with a wireless control signal line. SOLUTION: When a four-car organization train is cut off into two trains of two-car organization each, a voice signal line 9, a wireless control signal line 10 and an output amplifier control signal line 31 are cut off for the two-car organization, and all controls are independently provided for the two-car organization. Wireless microphones 27, 28 and wireless control devices 19, 20 and wireless microphones 29, 30 and wireless control devices 21, 22 are set to different frequencies. When any wireless microphone is taken out of the slot of the wireless control device, no radio interference failure occurs even if these trains are located closely. An indoor broadcast can be made with no volume change from an optional position in the train.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless broadcasting apparatus capable of efficiently performing in-vehicle broadcasting from an arbitrary position in a train to which a plurality of railway vehicles are connected, and an in-vehicle broadcasting system using the same. It is about the method.

[0002]

2. Description of the Related Art Conventionally, when performing in-vehicle broadcasting in a train to which a plurality of railway vehicles are connected, a wireless broadcasting device provided with a wireless receiver and a receiving antenna for each vehicle has been used.

[0003]

However, the above-mentioned conventional wireless broadcasting apparatus has the following problems. (I) Since the radio receiver and the receiving antenna installed for each vehicle change the radio waves emitted from the wireless microphone into those that can be received and those that cannot be received as the wireless microphone moves, the broadcast volume tends to change. (Ii) In order to change the operating frequency of the wireless microphone system, it is necessary to adjust not only the frequency setting switch of the wireless microphone but also the frequency setting switches of all wireless receivers installed for each vehicle. (iii) All wireless receivers installed for each vehicle are always in a state where reception and output are possible even when a wireless microphone is not used, and there is a possibility of interference.

The present invention has been made to solve these problems of the prior art, and an object of the present invention is to efficiently transmit an in-vehicle broadcast from an arbitrary position in a train to which a plurality of railway vehicles are connected without changing the volume. It is an object of the present invention to provide a wireless broadcasting device that can be performed in an efficient manner and a method for in-vehicle broadcasting using the same.

[0005]

According to the present invention, a wireless receiver capable of remotely controlling a receiving frequency setting and a receiving output is installed for each vehicle of a train, and a receiving frequency control function and a receiving frequency control function are provided in each crew room of the train. A wireless broadcasting device in which a wireless control device having a reception output control function is installed, and all wireless receivers of the train and the wireless control device are connected by a wireless control signal line.

In a preferred embodiment of the wireless broadcasting apparatus according to the present invention, a speaker, an output amplifier connected to an output amplifier control signal line and an audio signal line are installed for each vehicle of the train, and a wireless receiver is connected to a receiving antenna and an audio signal. Line and the wireless controller to the output amplifier control signal line. In a preferred aspect of the wireless broadcasting device of the present invention, the wireless control device has a reception frequency setting switch of the wireless receiver, and a slot that also serves as a permanent location of the wireless microphone and a charging function of the wireless microphone. By taking out, the reception frequency control signal and the reception output control signal are automatically transmitted to the wireless control signal line.

Further, the present invention provides a method for performing in-vehicle broadcasting by a wireless microphone from an arbitrary position in a train to which a plurality of railway vehicles are connected, using the above-mentioned wireless broadcasting device. By transmitting the reception frequency control signal and the reception output control signal to the wireless control signal line, the reception frequencies of the wireless receivers of all the vehicles are set to the desired frequencies that match the wireless microphones, and the reception is enabled. Along with
When any of the wireless receivers are in the receiving state,
By stopping the reception output control signal sent to the wireless control signal line, the wireless receiver is prevented from outputting audio signals from a plurality of wireless receivers and changing the broadcast volume. A method characterized by the following.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a wireless broadcasting device according to the present invention will be described.
Although described below with reference to the drawings, the present invention is not limited to this.

FIG. 1 is a block diagram of a wireless broadcasting device according to the present invention. A plurality of wireless receivers 1 to 4 installed for each vehicle are respectively provided with receiving antennas 5a to 5a to antenna input terminals.
8a, 5b to 8b, an audio signal line 9 to a reception output terminal, and a wireless control signal line 10 to a control signal terminal.
Are connected. Each of the plurality of output amplifiers 11 to 14 installed for each vehicle has speakers 15 to 18 connected to its output terminal, and the audio signal line 9 connected to its input terminal. The plurality of wireless control devices 19 to 22 installed in each crew room respectively include frequency setting switches 23a to 26a and 23b to 2
6b, and a wireless microphone charging slot also serving as a charging function and a permanent location of the wireless microphones 27 to 30,
The wireless control signal line 10 is connected to the wireless control terminal, and the output amplifier control signal line 31 is connected to the output amplifier control terminal.

First, an operation example of the wireless broadcasting device in a four-car train will be described. Wireless control device 19
The wireless microphones 27 to 30 inserted into the wireless microphone charging slots 22 to 22 are always charged and in a usable state, and the transmission frequency of the wireless microphone 27 and the frequency setting switch of the wireless control device 19 are the same, for example, Set to 11 channels, wireless microphone 2
8 and the frequency setting switch of the wireless control device 20 are set to the same, for example, 12 channels, and the transmission frequency of the wireless microphone 29 and the wireless control device 21 are set.
The frequency setting switch of the wireless microphone 30 and the frequency setting switch of the wireless control device 22 are the same, for example, 14 channels.
Set to channel.

In order to perform in-vehicle broadcasting using a wireless microphone 27 whose transmission frequency is set to 11 channels,
When this is taken out of the charging slot of the wireless control device 19, the wireless control device 19 sends out the reception frequency control serial signal set in advance to channel 11 by the frequency setting switches 23a and 23b to the wireless control signal line 10, and The reception frequencies of all the wireless receivers 1 to 4 connected to are set to 11 channels and become ready to receive. Subsequently, similarly, the DC voltage signal of the reception output control is started to be transmitted from the wireless control device 19 to the wireless control signal line 10, and all the wireless receivers 1 to 4 connected to the DC voltage signal hold the state in which the reception output is possible. . Next, when the transmission switch of the wireless microphone 27 is pressed and a radio wave is emitted, and this is received by the wireless receiver 1, first, the wireless receiver 1
Wireless control signal line 10 from wireless control device 19
Short-circuits the DC voltage signal of the reception output control sent to the wireless control device 19, and outputs the reception output to the audio signal line 9, thereby detecting the short-circuit.
Transmits an output amplifier start signal from an output amplifier control terminal to an output amplifier control signal line 31 to set all output amplifiers 11 to 14 installed for each vehicle to an operation state in which in-vehicle broadcasting is possible, and The wireless receivers 2 to 4 in the receivable state determine that the DC voltage signal of the reception output control of the wireless control signal line 10 has stopped,
Even if one of these wireless receivers, for example, the wireless receiver 2 enters the receiving state with the movement of the wireless microphone 27, the reception output is not output to the audio signal line 9, so that the in-vehicle broadcast can be performed without a change in volume. Also, at this time, if the wireless receiver 1 becomes incapable of receiving, the receiver already in the receiving state, in the above-described example, the wireless receiver 2 performs the same operation instead of the previous wireless receiver 1. In-vehicle broadcasting can be continued without interruption.

The above operation has been described with reference to the wireless microphone 28.
Are the same, except that the use frequency is 12 channels when using the wireless microphone 29, the use frequency is 13 channels when using the wireless microphone 29, and the use frequency is 14 channels when using the wireless microphone 30. .

Next, an example of the operation of the apparatus when the four-car train shown in FIG. 1 is separated into two cars will be described. When the four-car train is separated into two trains each consisting of two trains, the audio signal line 9, the wireless control signal line 10, and the output amplifier control signal line 31 are also divided into two-car trains, and all control is performed by two-car trains. Independent of each other. Therefore, as described above, no matter which wireless microphone is taken out of the slot of the wireless control device, the wireless microphones 27 and 28 and the wireless control devices 19 and 20 can be used as in the frequency setting example shown in FIG. And the wireless microphone 29,
If the frequency settings of 30 and the wireless control devices 21 and 22 are different, no interference fault will occur even if these trains are close to each other.

[0014]

The wireless broadcasting device of the present invention has the following effects because it is configured as described above. (1) The in-vehicle broadcast by the wireless microphone can be efficiently performed from an arbitrary position in a train to which a plurality of railway vehicles are connected without a change in volume. (2) Even if the train is separated into two or more trains and is in an approaching state, it is possible to perform in-vehicle broadcasting without mutual interference. (3) Since the connection between the wireless receiver and the receiving antenna does not straddle the connecting portion of each vehicle, a coaxial cable connection between the connected vehicles is unnecessary.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless broadcasting device of the present invention.

[Explanation of symbols]

 1-4 wireless receiver 5a-8a receiving antenna 5b-8b receiving antenna 9 audio signal line 10 wireless control signal line 11-14 output amplifier 15-18 speaker 19-22 wireless control device 23a-26a frequency setting switch 23b-26b frequency Setting switch 27-30 Wireless microphone 31 Output amplifier control signal line

Claims (5)

[Claims] 1. A wireless receiver capable of remotely controlling a reception frequency setting and a reception output for each vehicle of a train,
A wireless control device equipped with a reception frequency control function and a reception output control function is installed in each crew room of the train, and all wireless receivers of the train and the wireless control device are connected by a wireless control signal line. Wireless broadcasting device. 2. A speaker, an output amplifier connected to an output amplifier control signal line and an audio signal line, and an output amplifier connected to a receiving antenna and an audio signal line for each vehicle of the train. The wireless broadcasting device according to claim 1, wherein the wireless broadcasting device is connected to an output amplifier control signal line. 3. The wireless broadcasting device according to claim 1, wherein the wireless control device has a reception frequency setting switch of the wireless receiver, and a slot that also serves as a permanent location of the wireless microphone and a charging function of the wireless microphone. . 4. The wireless broadcasting device according to claim 3, wherein a receiving frequency control signal and a receiving output control signal are automatically transmitted to a wireless control signal line by taking out a wireless microphone from the slot. 5. A method for performing in-vehicle broadcasting by a wireless microphone from an arbitrary position in a train to which a plurality of railway vehicles are connected, using the wireless broadcasting device according to claim 1. From the wireless controller,
By transmitting the reception frequency control signal and the reception output control signal to the wireless control signal line, the reception frequencies of the wireless receivers of all the vehicles are set to the desired frequencies that match the wireless microphones, and the reception is enabled. In addition, when one of the wireless receivers is in a receiving state, the wireless receiver stops the reception output control signal sent to the wireless control signal line, so that audio signals from a plurality of wireless receivers are output. A method wherein output is performed to prevent a change in broadcast volume.