JPH05344025A - Radio equipment - Google Patents

Abstract

PURPOSE:To provide a radio equipment by which a line utility cost is almost halved by realizing a remote control function having been implemented through a 4-wire (4W) private line by a 2W exclusive line. CONSTITUTION:A master set 20 provided with a tone frequency detector 21 and a slave set 10 provided with a tone frequency oscillator 11 are connected by a 2-wire private line 100 and the master set 20 is connected to a radio equipment main body 30 in the radio equipment, then the master set 20 is provided with a switch 22 turning off a reception signal from the radio equipment main body 30 and when the tone frequency from the oscillator 11 is detected by the detector 21, the switch 22 is turned of f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless device, and more particularly to a wireless device used for a remote control device or the like in a taxi wireless system.

[0002]

2. Description of the Related Art Conventionally, in a radio used for a remote control device of a taxi radio system, a master unit (radio unit side) and a slave unit (operator operating side) are connected by a dedicated line, Voice signals and data (control commands) have been exchanged between the slave unit and the mobile station via the master unit and the radio main unit. At that time, depending on whether the number of control commands is large or small, it is distinguished whether to use a dedicated line of 4W (wire-) or a dedicated line of 2W (wire-). As a dedicated line, a 3.4KHz line is usually used.

That is, when there are few control commands, 2
A W dedicated line was used and voice signals and data were exchanged on the same line. At that time, control commands were exchanged at the ton frequency (1). If there are many control commands, a dedicated line of 4 W is used, and the line for voice signals and the line for data are separated.
Control commands were exchanged by a microcomputer (2).

[0004]

However, the above (1),
The method (2) has the following problems. Problems in the method of (1). Normally, the wireless device is always in the receiving state if it is not in the transmitting state. Therefore, when a 2W (wire-) dedicated line is used, if the wireless device is in the receiving state, the reception received by the wireless device is received. Signals are constantly being sent to a dedicated line connecting the master and slave units. At this time, the S / N ratio of the 2W leased line is in a bad state. Therefore, when voice signals and data are exchanged using the same line in this way, data is transmitted from the slave unit to the master unit under the condition that the S / N ratio of the line is bad. Data (control command) must be transmitted. When transmitting a control command from the slave unit to the master unit, the S / N ratio of the line must be good.

Problems in the method (2). As mentioned above, a 3.4KHz line is used as a dedicated line connecting the slave unit and the master unit. On the other hand, the audio signal is about 2 KHz. Therefore, when the control between the master unit and the slave unit is performed by the dedicated line of 2 W as in the method (1), the tone frequency band that can be used as the control command (data) is very limited. Therefore, the number of control commands is extremely limited. Therefore, if the number of data (control commands) to be controlled increases, as in the method of (2), 4W (wire)
Separately, the voice line and the data line are separated by using the dedicated line. In this way, the control command (data
You can increase the number of
It becomes possible to transmit data without being bothered by the noise on the line as in the method. As described above, 4W compared to remote control using a 2W dedicated line
The remote control using the dedicated line has the advantages described above. However, the line usage cost is doubled by simple calculation.

The present invention has been made in view of the above problems, and realizes remote control, which has been performed using a dedicated line of 4W, with a dedicated line of 2W without losing the advantage of the 4W system, and uses the line. It is an object of the present invention to provide a radio device that can reduce the cost to about half.

[0007]

In order to achieve the above object, a radio device according to the present invention comprises a master unit having a detector for a tone frequency and a slave unit having an oscillator for a tone frequency. Is connected by two dedicated lines, and the master unit is connected to the radio main unit. In the radio unit, a switch for turning off a reception signal from the radio main unit is provided in the master unit, and The switch is turned off when the detector detects the tone frequency.

[0008]

FIG. 3 is a block diagram showing the basic construction of the present invention. The operation of the present invention will be described based on FIG. A slave 10 provided with an oscillator 11 having a tone frequency and a micro computer 12, a microcomputer 23, a detector 21 having a tone frequency, and a radio when the tone frequency is detected by the detector 21. Switch 22 for turning off the signal received from the main unit 30
It is configured such that the parent device 20 provided with is connected by two dedicated lines 100, and the parent device 20 is connected to the radio main body 30.

Normally, the leased line 100 is used as a bidirectional line between the slave unit 10 and the master unit 20, but when transmitting a control command (data), the slave unit 10 sends data to the master unit 20. Used as a one-way line. Switching of the leased line 100 from the bidirectional line to the unidirectional line is performed as follows.

When a press operation is performed on the slave unit 10 side, the ton frequency is changed from the ton frequency oscillator 11 to the leased line 100.
Sent to. The ton frequency is detected by a ton frequency detector 21 provided in the master device 20. When the tone frequency is detected by the detector 21, the switch 22 is turned off by the microcomputer 23 so that the received signal from the radio main unit 30 is not transmitted to the dedicated line 100, and the dedicated line 100 is a slave unit. Used as a dedicated line from 10 to master device 20. After that, the control command following the transmission press is sent from the slave unit 10 to the leased line 100 by using the microcomputer 12. Then, when the transmission of the control command is completed, the switch 22 is turned on by the microcomputer 23, and the leased line 100 is used again as a bidirectional line.

As described above, the radio device according to the present invention switches the dedicated line 100 from the bidirectional line to the unidirectional line by detecting the ton frequency, and the 2W dedicated line is 4W.
The remote control function of the dedicated line is realized.
For example, in the above, when the switch 22 is turned off, the reception signal from the radio main unit 30 is not transmitted to the leased line 100, so that the S / N ratio of the leased line 100 becomes good, and many signals from the microcomputer 12 are received. Data (control command),
In principle, it is possible to transmit data (control command) that is almost infinitely accurate. Further, by realizing the function of the 4W (wire-) dedicated line with the 2W (wire-) dedicated line, it becomes possible to reduce the line usage cost by about half.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a radio device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a circuit configuration of a wireless device according to an embodiment. In the wireless device according to the embodiment, if roughly grasped, the slave device 10 and the master device 20 are connected by a dedicated line 100 of 2W (wire), and the master device 20 is connected with the wireless device 30 and the slave device. A microphone 41 and a speaker 42 are connected to the device 10.

The slave unit 10 is provided with a tone frequency oscillator 11, a micro computer 12, a switch 13, amplifiers 14, 15, 16 and an input / output transformer 17, and a coil 17 a constituting the input / output transformer 17 is provided. One end 17ae is grounded, and the coil 17b is connected to the private line 100. 41 such as microphone is a voice signal line
It is connected to the input side of the amplifier 14 via 41a, and to the input side of the microcomputer 12 via the data signal line 41b. Microcomputer 12 is data signal line 12
connected to the input side of amplifier 14 via
The output side of 14 is the input terminals 15a and 15b of the amplifier 15 and the coil.
Connected to one end 17ad of 17a, the output side of amplifier 15
It is connected to the mosquito 42. Also, the micro computer 12
Is also connected to switch 13, and switch 13
The oscillator 11 having a high frequency is connected to the input side of the amplifier 16 as well. The output side of the amplifier 16 is connected to the microcomputer 12 and also to the input side of the amplifier 14.

The master unit 20 is provided with a tone frequency detector 21, a switch 22, a microcomputer 23, amplifiers 24 and 25, and an input / output transformer 26, and a coil 26b constituting the input / output transformer 26 is dedicated. It is connected to the line 100 and one end 26ae of the coil 26a is grounded. One end 26ad of the coil 26a is connected to the input terminals 25a and 25b of the amplifier 25 and the output side of the amplifier 24, and the output side of the amplifier 25 is connected to the radio main unit 30 via the audio signal line 28a and is also connected to the demultiplexer. -Data line 28
connected to the microcomputer 23 via b, and
It is also connected to the detector 21 via the tone frequency detection line 28c. The detector 21 is connected to the microcomputer 23, which is connected to the switch control line 23a.
Is connected to the switch 22 via the control line 23b and to the input side of the switch 22 via the control line 23b.
It is also connected to the radio unit 30 via c. The radio unit 30 is connected to the input side of the switch 22,
The output side of 22 is connected to the input side of the amplifier 24, and the output side of the amplifier 24 is connected to one end 26ad of the coil 26a and also to the input terminals 25a and 25b of the amplifier 25.

The radio device constructed as described above operates as follows. When a press operation is performed by an operator or the like, a press signal indicating the operation is input from the microphone 41 or the like to the microcomputer 12 via the data signal line 41b. When the press signal is received, the microcomputer
Switch 12 turns on switch 13. Micro computer
When the switch 13 is turned on by 12, the ton frequency oscillated from the ton frequency oscillator 11 is sent to the dedicated line 100 from the input / output transformer 17 via the switch 13, the amplifier 16 and the amplifier 14. The ton frequency transmitted to the leased line 100 is received by the input / output transformer 26, and thereafter,
It is input to the ton frequency detector 21 through the amplifier 25 and the ton frequency detection line 28c. When the tone frequency is detected by the detector 21, a signal indicating the detection is transmitted from the detector 21 to the micro computer 23, and the micro computer 23 causes the switch 22 to operate via the switch control line 23a. Turned off.

When the switch 22 is turned off, the radio main body 30
Since the received signal from is no longer sent to the leased line 100 via the switch 22, amplifier 24, and input / output transformer 26, the S / N ratio of the leased line 100 becomes good, and the data from the slave unit 10 to the master unit 20 is transmitted. Also, it becomes possible to accurately transmit the audio signal.

When transmitting an audio signal, the audio signal output from the microphone 41 is amplified by the amplifier via the audio signal line 41a.
It is input to the amplifier 14 and sent from the amplifier 14 to the dedicated line 100 via the input / output transformer 17. The audio signal sent to the leased line 100 is received by the input / output transformer 26, and then the amplifier.
25 is transmitted to the wireless device main body 30 via the audio signal line 28a.

When transmitting data, the data (control command) signal output from the microphone 41 is the data signal line.
It is input to the micro computer 12 via 41b, output from the micro computer 12 to the amplifier 14 via the data signal line 12a, and then from the amplifier 14 to the dedicated line 100 via the input / output transformer 17. Sent to. Leased line
The data signal sent to 100 is received by the input / output transformer 26 and input to the microcomputer 23 via the amplifier 25 and the data signal line 28b. Then, it is transmitted from the microcomputer 23 to the radio main body 30 via the control line 23c.

In the wireless device, the audio signal sent from the mobile station is received by the wireless device main body 30 and sent to the dedicated line 100 through the switch 22, the amplifier 24 and the input / output transformer 26. , A real vehicle, an empty vehicle, and the like are input to the microcomputer 23 from the radio main body 30 through the control line 23c, and then the microcomputer
It is sent from the controller 23 to the dedicated line 100 via the control line 23b, the switch 22, the amplifier 24 and the input / output transformer 26.

FIG. 2A is a flow chart showing the operation of the microcomputer 23 in the master device 20,
(B) is a flow chart showing the operation of the microcomputer 12 in the slave unit 10. It will be described from FIG. First, in step 1, it is determined whether or not a press operation has been performed. Step 2 when the press operation is performed
Then, the switch 13 is turned on and the ton frequency is oscillated from the ton frequency oscillator 11. Next, the data (control command) is sent to the dedicated line 100 through the data signal line 12a.
(Step 3). Then, in step 4, a signal indicating the completion of the transmission of the data is transmitted and the process returns to step 1.

Next, the flow chart of FIG. 2A will be described. In step 5, it is judged whether the ton frequency is detected. If the ton frequency is detected, the process proceeds to step 6. In step 6, the switch 22 is turned off so that the reception signal from the radio main body 30 is not transmitted to the dedicated line 100. Next, at step 7, it is judged whether or not the signal indicating the completion of the transmission of the data transmitted from the slave 10 is received. When the signal is received, the process proceeds to step 8 to turn on the switch 22, and then the process returns to step 5.

As described above, in the radio device according to the present embodiment, the detector 21 provided in the master device 20 is used to detect the slave device 10.
When the tone frequency sent from the side is detected, the switch 22 is turned off by the microcomputer 23, and the reception signal from the radio main unit 30 is not sent to the leased line 100. The S / N ratio becomes good, and it is possible to transmit a large amount of data (control command) from the slave unit 10 side to the master unit 20 side with high accuracy, even though it is a dedicated line of 2W. In other words, by using the wireless device according to the present embodiment, the remote control function that was conventionally realized by using the dedicated line of 4W can be realized by the dedicated line of 2W.
Line usage costs can be cut in half.

[0023]

As described above in detail, in the radio device according to the present invention, a large amount of data (control command) is transmitted with high precision, and a conventional dedicated line of 4W (wire) is required. 2W remote control function that could not be realized
It can be realized by a dedicated line of (wire), and the line use cost can be reduced to about half.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram schematically showing an embodiment of a wireless device according to the present invention.

FIG. 2 (a) is a micro computer equipped with a master device.
3B is a flowchart showing the operation of the computer, and FIG. 6B is a flowchart showing the operation of the microcomputer provided in the child device.

FIG. 3 is a block diagram showing a basic configuration of the present invention.

[Explanation of symbols]

 10 Slave device 11 Tone frequency oscillator 12, 23 Micro computer 13, 22 Switch 20 Master device 21 Tone frequency detector 30 Radio unit

Claims (1)

[Claims] 1. A master unit having a detector for a tone frequency,
In a radio unit in which a slave unit having an oscillator of a tone frequency is connected by two dedicated lines, and the master unit is connected to the main unit of the radio unit, a reception signal from the main unit of the radio unit is included in the master unit. Is equipped with a switch to turn off the
The wireless device is configured so that the switch is turned off when the detector detects an input frequency.