JPH09312586A - Radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the operation of the radio equipment by providing a changeover switch between a transmission voice processing section and a modulation section and giving an output of the transmission voice processing section to a reception voice amplifier section so as to sound a voice signal or an emergency signal from a speaker without radiation of a radio wave. SOLUTION: The radio equipment is provided with a 1st local oscillation section 16 for an operation confirming test different from an oscillation circuit 12, and in the case of transmission in the radio equipment, a transmission output leakage radio wave from a dummy antenna circuit 9 is received by an antenna 10 to confirm the transmission reception operation. In the case of the operation confirmation test, in the case that an alarm tone is not normally outputted from a speaker 15, a test switch 1 is thrown to the position of a reception voice amplifier section 14, then a voice signal from a microphone 3 or an emergency tone signal 5 generated by depressing an alarm switch 4 is sent to a transmission voice processing section 6, the switch 1 and the amplifier 14 in this order and the speaker 15 sounds the reproduced voice signal or the emergency tone signal so as to confirm the emergency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a press-talk type wireless device provided with an alarm switch,
The present invention relates to a wireless device intended to protect oneself by reporting danger information as an alarm signal and avoiding a collision such as a train in advance.

[0002]

2. Description of the Related Art A press-talk type radio has a single frequency and is divided into a transmitting (speaking) side and a receiving (listening) side for communication. This switch for switching between transmission and reception is called a PTT switch. Hereinafter, with reference to FIG. 3, a press talk type wireless device will be described. First, by pressing a PTT switch (not shown), the radio set to the transmission state causes the transmission voice processing unit 6 to perform a predetermined signal processing on the voice signal input from the microphone 3 and then modulates it with the modulation circuit 7. The signal is amplified by the power amplifier 8 and output from the antenna 10 to the air as a radio wave. On the other hand, another wireless device in the receiving state in which the PTT switch is not pressed receives the radio wave, demodulates it in the receiving circuit 13, amplifies the audio signal in the audio amplifier 14, and outputs the audio signal from the speaker 15.

Next, a conventional protection radio device will be described with reference to FIG. Generally, radios designed to protect operators are
It is often used in relatively dangerous places. When an emergency or danger information is reported by using the normal press talk type wireless device, the situation in which the notification is not noticed is likely to occur because the transmission by a voice signal is scratched off by ambient noise and the like. The transmitting side also has to repeatedly notify the dangerous information until it confirms whether it has been received, but this is not a burden for itself. Therefore,
A tone signal resistant to noise is generated by the alarm switch 4, and radio waves are output as danger information in the same manner as a voice signal. On the other hand, another radio that receives the radio wave detects a tone signal, and a speaker emits a voice signal or a tone signal to alert the operator.

[0004]

For example, in a train radio system or the like, when a danger information such as approaching a train is notified from a command room to a worker in a railway facility, a tone signal as an alarm signal is issued from a radio device in the command room. There is a wireless system in which an alarm sound is output from a portable wireless device on the side of a worker who receives the tone signal and notifies the danger. Since the notification of such dangerous information is urgent and important information concerning the life and death of workers, whether the alarm signal transmission / reception part of the radio used is operating normally and whether the notification can be transmitted / received at all times , It is necessary to check the operation regularly. However, conventionally, in this type of wireless system, when confirming the operation of the alarm signal transmitting / receiving unit of the target wireless device, it is always necessary to make the two wireless devices, the transmitting side and the receiving side, face each other. However, if you do not notify the receiving side in advance that you will perform an operation check test, there is a problem that the receiving side will mistakenly judge that you have received dangerous information,
There was a drawback that the above operation confirmation test could not be performed easily.

The present invention has been made in view of the above situation, and an object of the present invention is to confirm the operation of a radio device to be used in a radio system for reporting danger information such as approaching a train as an alarm signal as described above. It is an object of the present invention to provide a wireless device that can perform an operation confirmation test of a transmission / reception unit very easily with one device without facing two wireless devices on the transmitting side and the receiving side when performing a test.

[0006]

In order to solve the above problems, the present invention provides a changeover switch between a transmission voice processing unit and a modulation unit and transmits the output of the transmission voice processing unit to a reception voice amplification unit. By doing so, without radiating radio waves,
A voice signal or an emergency signal will be emitted from the speaker so that the operation can be confirmed. Further, by providing a changeover switch between the transmission power amplifier and the antenna switch and transmitting the transmission output to the pseudo antenna circuit, it is possible to prevent radio waves from being emitted into the air. Furthermore, by having a different first local oscillator section for an operation confirmation test that is different from the oscillation circuit used for transmission, a pseudo antenna circuit does not generate an emergency tone signal during transmission in the same radio. It enables to check the operation by receiving the transmission output leak radio wave in. still,
Even if the transmission output is erroneously radiated during the operation check, the tone signal superimposed on the transmission voice section is separated from the modulation section by the changeover switch, so that no false alarm occurs.
As a result, it is possible to check the operation of the entire transceiver unit of the wireless device extremely easily with one unit without adversely affecting the wireless system for protection.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a train radio system in which a protection radio device according to an embodiment of the present invention is used will be described with reference to FIG. In this system, the wireless device according to the present invention is mounted on a train and carried by a maintenance worker to achieve the following objects (1) to (3). (1) In the event of a train abnormality such as a derailment, contact this train to a nearby train to minimize the accident and provide prompt rescue. (2) When construction or abnormalities on the track are found, maintenance personnel will contact a nearby train to prevent accidents. (3) To notify the workers that the train is approaching and to ensure the safety of the workers.

Next, a normal communication operation in one embodiment of the present invention will be described with reference to FIG. In the normal communication operation, the protection wireless device of the present invention operates in the same manner as the press-talk wireless device shown in FIG.
Further, in case of emergency, the tone signal is also sent on the same line as the voice signal. That is, at the time of transmission, after the audio signal from the microphone 3 and the emergency tone signal 5 generated by pressing the alarm switch 4 are subjected to signal processing of a predetermined audio level by the transmission audio processing unit 6, the modulation circuit 7,
Signals are transmitted in the order of the power amplifier 8, pass through the antenna switch 11, and are radiated into the air by the antenna 10.
Further, at the time of reception, the radio wave received by the antenna 10 passes through the antenna switch 11, is demodulated by the receiving circuit 13, the voice signal and the tone signal are amplified by the voice amplifier 14, and the speaker 15 is received.
Use to sound an audio signal or tone signal.

The operation in the operation confirmation test in this embodiment will be described below. In FIG. 1, by switching the test switch 1 to the modulation circuit 7 side and further switching the test switch 2 to the pseudo antenna circuit 9 side, the audio signal from the microphone 3 is transmitted to the transmission audio processing unit 6, the test switch 1,
By reducing the electric power in the pseudo antenna circuit 9 via the modulation circuit 7, the power amplifier unit 8 and the test switch 2, it is possible to prevent radio waves from being emitted into the air. Further, it is provided with another operation confirmation test first station starter 16 different from the oscillation circuit 12 used for transmission, and the transmission output leak radio wave from the pseudo antenna circuit 9 at the time of transmission in the same radio device. Can be received by the antenna 10 and the operation of transmission and reception can be confirmed. In this operation confirmation test, when the alarm sound is not normally output from the speaker 15, it is generated by switching the test switch 1 to the reception voice amplification unit 14 side and pressing the voice signal from the microphone 3 or the alarm switch 4. The emergency tone signal 5 is transmitted in the order of the transmission voice processing unit 6, the test switch 1, and the reception voice amplifier 14, and the reproduced voice signal and the emergency tone signal are output from the speaker 15 to generate the emergency tone signal. Part 5
Check the operation of. With the above simple operation, it is possible to easily separate the failure portion (abnormal operation portion).

[0010]

As described above, according to the present invention,
It is possible to generate an emergency signal without emitting radio waves in the air by using the protective radio unit alone without facing the two radio units on the transmitting side and the receiving side. The operation confirmation can be performed very easily.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional protection wireless device.

FIG. 3 is a block diagram showing a configuration of a conventional press talk type wireless device.

FIG. 4 is an example of a protective train radio system.

[Explanation of symbols]

1 ... Test switch 1, 2 ... Test switch 2, 3 ... Microphone, 4 ... Alarm switch, 5 ... Tone signal, 6 ...
Transmission voice processing unit, 7 ... Modulation circuit,
8 ... Power amplifier, 9 ... Pseudo antenna circuit,
10 ... antenna, 11 ... antenna switch,
12 ... Oscillation circuit, 13 ... Receiver,
14 ... Audio amplifier, 15 ... Speaker,
16 ... First local oscillation circuit.

Claims (2)

[Claims] 1. A transmission unit including a voice processing unit for performing predetermined transmission signal processing on a voice signal or an emergency signal to be transmitted, and a unit for modulating and amplifying an output signal of the voice processing unit and transmitting the modulated signal to a partner station. And a receiving unit including means for receiving and reproducing a signal from the partner station, in a first path for giving the output signal of the audio processing section to the modulating section and a second path for giving to the receiving section. A wireless device comprising: a route; and switching means for selectively selecting the first and second routes. 2. The radio device according to claim 1, wherein an antenna circuit, a pseudo antenna circuit for reducing the power of an input signal, and the antenna circuit and the pseudo antenna circuit are selectively provided in the output stage of the transmitter. And a switching device for selecting the pseudo antenna circuit, and when the pseudo antenna circuit is selected, a radio wave transmitted from the pseudo antenna circuit is received by the local station via the antenna circuit.