JP2579363Y2 - Wireless systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a receiver, and more particularly, to a wireless system including a master unit and one or more slave units.

[Conventional technology]

2. Description of the Related Art There is a business wireless system in which one communication device is used as a master device and one or more communication devices are used as slave devices.

In this commercial radio system, if the operating frequency is fixed at one, when there is another interfering station operating at the same frequency, interference may hinder the business. Switching can be performed among a plurality of predetermined channels.

For example, when an interruption occurs during operation on one channel, an instruction to switch to two channels is given from the master unit to the slave unit by voice, and the master unit switches to two channels. Each slave unit that has received the channel switching instruction performs a channel switching operation in accordance with the instruction to switch to two channels.

As a result, since the operation channel of the system is changed to 2, the business communication can be performed without being interrupted.

Further, when the noise of the environment in which the system is used becomes high, the parent device gives an instruction to increase the volume by voice. The operator of each slave unit receiving the instruction performs a volume increase operation,
It will be possible to reliably hear the communication from the master unit.

Furthermore, if the system has a CTCSS function, and the communication that had been performed to all the slaves at the same time until now is to be performed on a one-to-one basis from the master to the slaves, voice communication from the master so
Give CTCSS ON instruction.

When each of the slave units receiving the CTCSS on instruction performs the CTCSS on operation, only one slave unit selected by the master unit can listen to the communication contents, and the remaining slave units are squelched on the audio output and listened. Becomes impossible.

[Problems to be solved by the invention]

However, in such a conventional wireless system, when the slave unit fails to hear the instruction from the master unit or cannot operate according to the instruction because both hands are closed, it contradicts the intention of the master unit. It will be a situation.

For example, if the slave unit does not follow the channel switching instruction, it will not be able to hear the communication from the master unit thereafter, if it does not follow the volume increase instruction, it will be difficult to hear the communication, and if it does not follow the CTCSS on instruction, it will be I can hear you.

The present invention has been made in view of the above-described problems of the related art, and has as its object to provide a wireless system capable of changing the operation state of a slave unit as intended by the master unit.

[Means for solving the problem]

The wireless system of the present invention has transmitting / receiving means connected to a microphone and a speaker, and the transmitting / receiving means is in a transmission mode when transmission is instructed by the transmission instruction operation means, and when transmission is not instructed. A transmitting / receiving unit connected to the microphone and the speaker, the transmitting / receiving unit being in a transmitting mode when transmission is instructed by the transmission instruction operating unit, and the transmission not being instructed; In a wireless system including one or a plurality of slave units in a reception mode, the master unit includes a channel switching operation unit for performing a channel switching operation and a channel switching operation unit while transmission is instructed by the transmission instruction operation unit. When a channel switching operation is performed in step, it is treated as a remote control channel switching operation, and the remote control channel switching control according to the operation is performed. Create a remote control signal corresponding to the remote control, output it to the sending / receiving means and send it, and if a response signal from any of the slave units is not received by the sending / receiving means, create the remote control signal again and A remote control signal generating means for outputting and transmitting to the transmitting / receiving means set to the same operation channel as the control signal transmission, and a channel switching operation means for channel switching operation while transmission is not instructed by the transmission instruction operation means When an operation is performed, the first operation channel switching control unit that performs switching control of the operation channel of the transmission / reception unit in accordance with the operation, and while transmission is instructed by the transmission instruction operation unit,
When a channel switching operation is performed by the channel switching operation unit, a remote control signal is transmitted by the remote control control signal generation unit, and then the transmission / reception is performed by switching the operation channel of the transmission / reception unit according to the channel switching operation. The means can receive a response signal from the slave unit, maintain the current operation channel if response signals are received from all the slave units, and when a response signal is not received by the sending / receiving means from any of the slave units, Switching control for returning the operation channel of the transmission / reception means to the original state is performed to enable transmission of the remote control signal again by the remote control signal generation means. Thereafter, the operation channel of the transmission / reception means according to the channel switching operation is changed. And second operation channel switching control means for performing switching control. Channel switching operation means for performing a channel switching operation; first operation channel switching control means for performing, when a channel switching operation is performed by the channel switching operation means, switching control of the operation channel of the transmission / reception means in accordance with the operation; Decoding means for decoding the remote control content when the remote control signal is received by the sending / receiving means, and operation of the sending / receiving means when the decoding means can determine that the remote control content is the remote control channel switching control. After controlling the channel switching, create a response signal and output it to the sending / receiving means.
And a second operating channel switching control means for transmitting.

Another wireless system of the present invention includes a master unit having a transmitting unit (or transmitting / receiving unit) connected to a microphone (or a microphone and a speaker), and a receiving unit (or a microphone and a speaker) connected to a speaker (or a microphone and a speaker). Sending and receiving means)
In a wireless system including one or a plurality of slave units, and a volume adjustment unit provided on the output side of the audio signal of the reception unit (or the transmission / reception unit), the master unit performs a remote control volume adjustment operation Operating means, and remote control control signal creating means for creating a remote control signal corresponding to remote control volume adjustment control in accordance with an operation of the operating means, outputting the signal to a transmitting means (or transmitting / receiving means) and transmitting the signal, Each slave unit decodes remote control contents when a remote control signal is received by a receiving unit (or a sending / receiving unit), and performs volume adjustment when a decoding result of the decoding unit is a remote control volume adjustment control. Volume control means for controlling the volume control of the means.

Still another wireless system of the present invention has transmitting / receiving means connected to a microphone and a speaker, and tone signal generating means for generating a tone signal according to a slave unit selecting operation,
A master unit in which the tone signal generated by the tone signal generating means is mixed with an audio signal output from the microphone and output to the transmitting / receiving means, and an audio signal output side of the transmitting / receiving means connected to the microphone and the speaker Tone detection / squelch means for detecting the presence / absence of a tone signal addressed to the own device, and for inhibiting or canceling the speech output depending on whether there is a tone signal addressed to the own device. And a plurality of slave units having a remote control CTCSS on / off operation, and a remote control CTCSS on / off operation corresponding to the operation of the operation unit.
A remote control signal corresponding to the off control is created, output to the transmission / reception means and transmitted, and when a response signal from any of the slave units is not received by the transmission / reception means, the remote control signal is again transmitted.
Remote control control signal generating means for generating a remote control signal corresponding to the CTCSS on / off control, outputting the signal to the transmitting / receiving means, and transmitting the signal to each transmitting / receiving means. A decoding means for decoding the contents of the remote control, a response means for creating a response signal when the result of the decoding by the remote control CTCSS on / off control is output to the transmission / reception means, and a decoding means; Decryption result is remote control CTCSS
CTCSS on / off control means for performing CTCSS on / off control for tone detection / squelch means at the time of on / off control.

〔Example〕

A first embodiment of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is a block diagram showing a configuration of a master unit of the wireless system according to the present invention, and FIG. 2 is a block diagram showing a configuration of a slave unit.

The master unit 10 has an amplifier circuit 14 connected to the output side of the microphone 12, and amplifies the audio signal output from the microphone 12. The output side of the amplifier circuit 14 is provided with a changeover switch SW (hereinafter, referred to as a switch SW).
1 simply referred to as “SW”. SW1
The DTMF encoder 16 is connected to the terminal b. DTMF
The encoder 16 converts a remote control code input from a microcomputer (hereinafter, simply referred to as a “microcomputer”) 18 into a corresponding dual tone signal sequence and outputs it to SW1.

The dual tone signal is, for example, a combination of two different frequency tone signals selected from eight different frequency tone signals, and represents a number from 0 to 9 or an alphabet.

A transmitting unit 20 is connected to the output side of SW1, and converts an audio signal or a dual tone signal sequence into a predetermined high-frequency signal modulated by FM. In the transmission unit 20, an FM modulation circuit 22 is connected to the output side of SW1, and the carrier wave output from the oscillator 24 is FM-modulated according to a voice signal or a dual tone signal sequence.

A mixing circuit 26 is connected to the output side of the FM modulation circuit 22, and the FM modulation signal is mixed with a local oscillation signal input from the PLL circuit 28 via SW2 and frequency-converted into a predetermined high-frequency signal. The output side of the PLL circuit 28 is connected to the common terminal of SW2, and the input side of the local oscillation signal of the mixing circuit 26 is connected to the a terminal.

The high frequency amplifier circuit 30 is connected to the output side of the mixing circuit 26, and the high frequency signal output from the mixing circuit 26 is amplified.

On the output side of the transmission unit 20 configured as described above, a
Connected to terminal. The common terminal of SW3 is connected to the antenna 32.

 The transmission unit 20 and the PLL circuit 28 constitute a transmission unit.

On the other hand, the receiving unit 34 is connected to the terminal b of SW3,
The FM modulated wave sent from the slave unit is received. Receiver
In 34, a high-frequency amplifier circuit 36 is connected to the terminal b of SW3, and the antenna reception signal is amplified.

A first mixing circuit 38 is connected to the output side of the high-frequency amplification circuit 36, and the high-frequency signal is mixed with a local signal input from the PLL circuit 28 via SW2 to generate a first intermediate frequency signal. The input side of the local oscillation signal of the first mixing circuit 38 is connected to the terminal b of SW2.

A second mixing circuit 40 is connected to the output side of the first mixing circuit 38, and the first intermediate frequency signal is mixed with the local oscillation signal input from the oscillator 42 to generate a second intermediate frequency signal. An intermediate frequency amplifying circuit 44 is connected to the output side of the second mixing circuit 40 to amplify the second intermediate frequency signal.

An FM detection circuit 46 is connected to the output side of the intermediate frequency amplification circuit 44, and performs FM detection on the second intermediate frequency signal to demodulate the audio signal.

A low-frequency amplifier circuit 48 is connected to the output side of the receiving unit 34 configured as described above, and an audio signal is amplified and output to a speaker 50 connected to the output side.

The low-frequency amplification circuit 48 incorporates a volume adjustment circuit, and the volume can be adjusted by turning the volume knob 52.

The transmission unit 20, the reception unit 34, and the PLL circuit 28 constitute transmission / reception means.

SW1 to SW3 are controlled by the microcomputer 18 for switching, and the microcomputer 18 is controlled by the microcomputer 18 to vary the oscillation frequency.

The microcomputer 18 has a PTT.SW54 as a transmission instruction operation means,
The rotary encoder 56 and the display unit 58 are connected. A channel switching knob 59 is connected to the rotary encoder 56, and a forward rotation pulse or a reverse rotation pulse is supplied to the microcomputer every time a predetermined amount is rotated clockwise or counterclockwise.
Output to 18.

The PTT.SW 54, the channel switching knob 59, and the rotary encoder 56 constitute an operation means for remote control channel switching operation.

The microcomputer 18 has a CPU, a ROM, and a RAM connected to a bus, and based on a predetermined program stored in the ROM,
Controls the switching between the reception mode and the transmission mode in conjunction with turning on / off the TT.SW54, controls the switching of the operating channel according to the forward rotation pulse or the reverse rotation pulse input from the rotary encoder 56, and controls the switching of the PTT.SW54. The switch control of SW1 is performed in accordance with the forward rotation pulse or the reverse rotation pulse from the rotary encoder 56 input during the ON state, and the remote control code related to the remote control channel switching control is output to the DTMF encoder 16.

In this embodiment, it is assumed that the operating channel can be switched from one channel to five channels at a predetermined frequency interval, and the remote control code related to the remote control channel switching control is composed of, for example, a four-digit numerical value. Channel (3301), Channel 2 (3301)
2) 3 channel is (3303), 4 channel is (330
4) Assume that channel 5 is (3305).

When the DTMF encoder 16 receives the remote control code, the DTMF encoder 16 outputs a dual tone signal sequence as a remote control signal to SW1 while sequentially generating predetermined dual tone signals corresponding to the numerical values of each digit. Microcomputer 18 and D
The TMF encoder 16 constitutes a remote control signal creation unit.

On the other hand, as shown in FIG.
The configuration is the same as that of 10, except for SW1, DTMF
The point is that there is no encoder 16 and the DTMF decoder 104 is connected to the output side of the receiving unit 78.

An FM modulation circuit on the output side of the microphone 62 via an amplification circuit 64
A transmitting section 66 including an oscillator 68, an oscillator 70, a mixing circuit 72, and a high-frequency amplifier circuit 74 is connected, and converts an audio signal into a predetermined high-frequency signal modulated by FM. The output side of the transmission unit 66 is connected to the terminal a of SW5, and the output side of SW5 is connected to the antenna 76.

The high-frequency amplifier circuit 80 and the first mixing circuit 8 are connected to the terminal b of SW5.
2, a receiving unit 78 including a second mixing circuit 84, an oscillator 86, an intermediate frequency amplifying circuit 88, and an FM detection circuit 90 is connected, and demodulates an audio signal or a remote control signal from an antenna received signal.

The input side of the local oscillation signal of the mixing circuit 72 of the transmitting section 66 and the receiving section 78
The input side of the local mixing signal of the first mixing circuit 82 is connected to the terminals a and b of the switch SW4, and the output side of the PLL circuit 92 is connected to the common terminal of the switch SW4.

The PLL circuit 92 varies the oscillation frequency at predetermined frequency intervals according to the oscillation frequency variable control by the microcomputer 96.

The output side of the receiving unit 78 is connected to a speaker 98 via a low-frequency amplifier circuit 94.

A receiving unit is configured by the receiving unit 78 and the PLL circuit 92,
The transmission unit 66, the reception unit 78, and the PLL circuit 92 constitute transmission / reception means.

The low-frequency amplification circuit 94 incorporates a volume adjustment circuit (not shown), and the volume is increased or decreased according to the rotation operation of the volume knob 100.

Also, a DTMF decoder 104 is connected to the output side of the receiving unit 78, and when a remote control signal composed of a dual tone signal sequence is input, decoding of the remote control code corresponding to the dual tone signal sequence is determined. Perform microcomputer 96
Output to

The microcomputer 96 includes a PTT.SW106, a rotary encoder 10
8. The display unit 110 is connected.

A channel switching knob 112 is connected to the rotary encoder 108, and outputs a forward rotation pulse or a reverse rotation pulse to the microcomputer 96 every time a predetermined amount is rotated clockwise or counterclockwise.

The microcomputer 96 has a CPU, a ROM, and a RAM connected to a bus, and executes a PT based on a predetermined program stored in the ROM.
Controls switching between reception mode and transmission mode in conjunction with ON / OFF of T.SW 106, and controls rotary encoder 108
It controls the switching of the operating channel according to the forward rotation pulse or reverse rotation pulse input from the
Controls the switching of the operating channel according to the remote control code input from 4.

Further, the microcomputer 96 performs display control such as channel display corresponding to the display unit 110.

The DTMF decoder 104 and the microcomputer 96 constitute a decoding means.

Each microcomputer 18 and the 96 of the RAM, the area for storing management channel data CH, the each channel frequency data FD ₁ ~FD ₅ is provided. The ROMs of the microcomputers 18 and 96 store remote control codes corresponding to remote control channel switching control of channels 1 to 5.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS.

Here, for simplicity, the master unit 10 and the slave unit 60 are both 1
It is assumed that the channels of the parent device 10 and the child device 60 are both three channels in advance.

The microcomputer 18 of the base unit 10 in the initial setting of the power switch on
Switches SW2 and SW3 to the b side to set the reception mode, and
Is switched to the a side, the frequency division ratio data corresponding to FD _CH = FD ₃ is calculated and output to the PLL circuit 28 to generate a local oscillation signal having a frequency corresponding to three channels. Further, channel display control is performed based on CH = 3, and three channels are displayed (step 150 in FIG. 3).

Since the local oscillation signal output from the PLL circuit 28 is input to the first mixing circuit 38 of the receiving unit 34 via SW2, the receiving unit 34
Tune to the channel.

On the other hand, the microcomputer 96 of the slave unit 60 switches SW4 and SW5 to the b side in the initial setting of the power switch on to set the receiving mode,
Calculate the frequency division ratio data corresponding to FD _CH = FD ₃ to obtain the PLL circuit 92
The operation channel is set to 3 channels, and 3 channels are displayed based on CH = 3 (step 250 in FIG. 5).

When the operator of master device 10 turns on PTT.SW54 for transmission, microcomputer 18 determines YES in step 152 in FIG.
Switch SW2 and SW3 to side a to set the transmission mode (step
154).

Since the local oscillation signal output from the PLL circuit 28 is input to the mixing circuit 26 of the transmission unit 20 via SW2, the transmission unit 20 has a transmission frequency corresponding to three channels.

When the operator speaks into the microphone 10 with the PTT.SW54 turned on, the audio signal output from the microphone 10 is amplified by the amplifier circuit.
After being amplified at 12, the signal is input to the transmission unit 20 and converted into a three-channel high-frequency signal that is FM-modulated. And SW3
, And is output to the antenna 32 to emit three-channel FM radio waves.

This FM radio wave is received by the antenna 76 of the
The signal is input to the receiving unit 78 via 5, and the audio signal is demodulated. The demodulated audio signal is amplified by the low-frequency amplifier circuit 94 and then output from the speaker 98 as audio.

Thereby, the parent device 10 can contact the child device 60.

When PTT.SW54 is turned off after the communication is over, the microcomputer 18
YES is determined in step 156 of the figure, and the mode is returned to the reception mode (step 158).

When the operator wants to contact from the slave unit 60 side, when the operator turns on the PTT.SW 106, the microcomputer 96 determines YES in step 252 of FIG. 5, switches SW4 and SW5 to the a side, and sets the transmission mode (step 254).

Then, with the PTT.SW 106 turned on, the operator
, The audio signal output from the microphone 62 is amplified by the amplifier circuit 64 and then input to the transmission unit 66,
It is converted into a modulated three-channel high-frequency signal. Then, the signal is output to the antenna 76 via the SW5, and three-channel FM radio waves are emitted.

After this FM radio wave is received by antenna 32 of base unit 10,
The signal is input to the receiving unit 34 via 3 and demodulated. The demodulated audio signal is amplified by the low-frequency amplifier 48 and then output from the speaker 50 as audio.

Thereby, the child device 60 can contact the parent device 10.

When the PTT.SW 106 is turned off after the communication is completed, the microcomputer 96 determines YES in step 256 of FIG. 5, and returns to the reception mode (step 258).

When interference is received from another business radio or the like during operation on three channels, the operator of the master unit 10 turns the channel switching knob 59 by, for example, two units in the forward direction while turning on the PTT.SW54. Then, two forward rotation pulses are output from the rotary encoder 56.

When the PTT.SW 54 is turned on, the microcomputer 18 switches to the transmission mode (steps 152 and 154 in FIG. 3). Subsequently, when the first forward rotation pulse is input, the microcomputer 18 determines that there is a channel switching operation (step 160), after registering CH = 3 as CH ', it is determined whether PTT.SW54 is ON (steps 162, 164). Since it is YES in this case, continue with microcomputer 18
Determines the channel switching direction, determines that the direction is the up direction since the normal rotation pulse is input, increments the CH to 4 (steps 166 to 170), sets the channel display to 4 based on this CH, and A timer for measuring a certain time is started (steps 172 and 174).

The timer is for determining whether the channel switching operation is continuous or interrupted.

The microcomputer 18 determines whether the channel switching operation has been performed again before the timer expires, and
It is repeatedly determined whether or not the PTT.SW54 has changed from on to off (steps 176 to 180). When the PTT.SW54 is on and the channel switching operation is continuously performed, the second forward rotation pulse is input before the time is up, so the microcomputer 18 determines YES in step 178. Returning to step 166, CH is set to 5, and the channel display is set to 5.
(Steps 168 to 172).

Then, the timer is restarted (step 174).
Here, if the operator finishes the channel switching operation with PTT.SW54 turned on, the microcomputer 18 determines YES in step 176 when the timer times out after a certain period of time, and switches SW1 to the b side to switch to the 5th channel. Remote control code (33
05) is read from the ROM and output to the DTMF encoder 16 (steps 178 to 182).

The DTMF encoder 16 that has input the remote control code
A dual tone signal corresponding to each numerical value of 0, 5 is created in order, and a dual tone signal train as a remote control signal is generated.
Output to the transmission unit 20 via SW1. SW1 is thereafter returned to the a side (step 184).

The remote control signal is converted into an FM modulation signal on three channels by the transmission unit 20 and emitted from the antenna 32 as an FM radio wave.

This FM radio wave is received by the antenna 76 of the handset 10,
At 78, the remote control signal is demodulated. The demodulated remote control signal is input to the DTMF decoder 104, and it is determined whether the signal is a correct dual tone signal sequence.
If the judgment result is correct, the original remote control code is decoded from the dual tone signal sequence and output to the microcomputer 96.

When the remote control code is input, the microcomputer 96 determines YES in step 260 of FIG. 5, checks the remote control content corresponding to the remote control code by referring to the ROM, and sets CH = 5 for channel 5 (steps 262 to 266). ), Frequency division ratio data corresponding to the frequency data of FD _CH = FD ₅ is created and output to the PLL circuit 92 to control the switching of the operation channel (step 268).

 As a result, the receiving unit 78 tunes to channel 5.

After the microcomputer 18 of the processing of step 184 in the base unit 10 side, the flow proceeds to step 200 of FIG. 4, and outputs to the PLL circuit 28 creates a division ratio data corresponding to the frequency data FD _CH = FD _5, The switching of the operation channel is controlled. As a result, the transmission unit 20 has five channels of transmission frequencies.

Therefore, both the master unit 10 and the slave unit 60 have switched to the operating frequency of 5 channels, and the master unit 10 can talk to the microphone 10 with the PTT.
The PTT.SW60 can also be turned on from the child device 60 and talk to the microphone 42 from the child device 60 without disturbing it.
You can contact the 10 side.

If the master device 10 wants to switch channels independently, the channel switching knob 59 may be turned while the PTT.SW 54 is turned off. For example, when the channel switching knob 59 is continuously rotated counterclockwise by two units from the operation state of five channels, the rotary encoder 56 outputs two signals.
Two reverse pulses are output continuously. The microcomputer 18 that has input the first reverse rotation pulse determines YES in step 160 in FIG. 3, sets the CH 'to 5, and since the PTT.SW54 is off, proceeds to the flow in FIG. Is determined to be the down direction, and CH is set to 4 (step 202).
~ 206).

Subsequently, the channel display is set to 4 based on the CH, and the timer is started (steps 208 and 210). When the second reverse pulse is input before the time is up, the microcomputer 18
Determines YES in step 214, sets CH to 3, sets channel display to 3, and then restarts the timer (steps 202 to 210). Then, when the time is up without inputting the reverse rotation pulse or the normal rotation pulse again, YES is determined in step 212, the frequency division ratio data corresponding to FD ₃ is created and output to the PLL circuit 28, and the operation channel is set. 3 (steps 216 and 200).

The slave unit 60 can change the operation channel of the slave unit 60 by turning the channel switching knob 112 regardless of whether the PTT.SW 106 is on or off. For example, when the channel switching knob 112 is turned clockwise by one unit from the operating state of five channels, the operating channel is changed to 1 (steps 270 to 286 and 268 in FIG. 5). Turning the unit counterclockwise changes the operating channel to four channels (step 270 in FIG. 5).
274, 288, 290, 280-286, 268).

According to this embodiment, in a wireless system in which the master unit 10 and the slave unit 60 can switch the operating frequency among a plurality of predetermined channels, the DTMF encoder is connected to the input side of the transmission unit 20 of the master unit 10 via SW1. The microcomputer 18 treats the operation of the channel switching knob 59 while the PTT.SW 54 is turned on as a remote control channel switching operation, and outputs a remote control code corresponding to the remote control channel switching control to the DTMF encoder 16 according to this operation. A dual tone signal sequence as a remote control signal is generated and output to the transmitting unit 20 for transmission, and the operation channel switching of the master unit 10 itself is controlled according to the remote control channel switching operation. , The receiving unit 78 of the slave unit 60
The DTMF decoder 104 is connected to the output side of the remote controller. When the remote controller control signal is received by the receiver 78, the DTMF decoder 104 decodes the remote controller code and outputs it to the microcomputer 96. When the code is input, the operation channel switching control of the slave unit 60 is performed, so that the operation channel of the master unit 10 itself is switched according to the remote controller channel switching operation on the master unit 10 side, and the operation channel is tracked. And the operation channel of the slave unit 60 is automatically switched.
The operation channel of the child device 60 can be changed as intended by the parent device 10 even when there is a situation where the operation cannot be performed, such as when both hands are closed on the 60 side.

Also, if the channel switching knob 59 is operated with the PTT.SW 54 turned off on the master unit 10 side, the operation channel of only the master unit 10 can be switched, and the channel switching knob 112 can also be operated on the slave unit 60 side. For example, since the operation channel of only the child device 60 can be switched, if the operation channels of the parent device 10 and the child device 60 are shifted for some reason, the operation channel of the child device 60 is manually operated by the parent device 10. The normal operation state can be easily restored by re-adjusting to the operation channel of the slave unit 60 or manually adjusting the operation channel of the slave unit 60 to the operation channel of the master unit 10. Moreover, master unit 10
The transmission instruction operation by turning on the PTT.SW 54 in the above means an active work on the slave unit 60 side, but when performing the remote control channel switching operation for the slave unit 60, the transmission instruction operation is required, and the channel for the master unit 10 is required. Since the transmission instruction operation is unnecessary when performing the switching operation, the channel switching including the slave unit 60 and the channel switching of the master unit 10 alone can be performed without fail.

In the above embodiment, one slave unit is used, but the present invention can be similarly applied to a system having a plurality of slave units.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a block diagram showing the configuration of the master unit of the wireless system, and FIG. 7 is a block diagram showing the configuration of the slave unit.

The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals.

In the second embodiment, there is provided a wireless system having a CTCSS function including one master unit and a plurality of slave units (in this embodiment, three units including a first slave unit to a third slave unit). In addition to remote control channel switching control, remote control audio adjustment control and remote control CTCSS on / off control can be performed from the parent device to the child device.

In the master unit 10A of FIG. 6, a tone signal generator 120 as tone signal generating means is connected to the terminal a of SW1. Tone signal generator 120 in accordance with tone generation and stop control by the microcomputer 18A, a tone signal according to the one frequency in a selective or generated f ₁ ~f _3, or stop the generation of the tone signal. The low-frequency amplification circuit 48A incorporates an electronic volume for volume adjustment, and performs volume adjustment according to audio adjustment control by the microcomputer 18A.

The DTMF decoder 122 is connected to the output side of the receiving unit 34, inputs the dual tone signal sequence received by the receiving unit 34, performs correct / incorrect judgment and decodes the corresponding code, and outputs it to the microcomputer 18A.

Microcomputer 18A has PTT.SW54, rotary encoder 56,
A key input unit 124 is connected in addition to the display unit 58A. The key input unit 124 is provided with numeric keys 0-9, A-D, *, and #, a SET key, a TR key, a CTCSS key, a volume up key, and a volume down key. Key-on signal.

The microcomputer 18A controls the switching between the reception mode and the transmission mode in conjunction with the on / off of the PTT.SW54, performs the operation channel switching control according to the normal rotation pulse or the reverse rotation pulse input from the rotary encoder 56,
In accordance with the operation of the volume up key or the volume down key, the volume of the electronic volume of the low frequency amplifier circuit 48A is adjusted or the CTCSS key is turned on.
The tone generation control for the tone signal generator 120 is performed in accordance with the operation of turning on the key, and the tone stop control is performed for the tone signal generator 120 in accordance with the operation of turning on the 0 key while the CTCSS key is on.

Also, when a specific numeric key is turned on while PTT.SW54 is on, it controls the switching of SW1, and also the remote control channel switching control, remote control volume adjustment control, and remote control CTCSS on / off control contents (definition) Output the remote control code corresponding to
Control for switching to the reception mode and input of the slave unit code from the DTMF decoder 122 are performed, and when no slave unit code is input from any of the slave units 60A, the same remote control code output is executed again (child unit). When the device receives the remote control signal and executes the remote control, the device transmits the slave code to the master as a response signal to the remote control signal).

When the remote control channel switching control is performed, its own operation channel switching control is also performed.

Further, the microcomputer 18A assigns keys to the remote control contents according to the operation of the ten keys following the ON operation of the SET key, performs user registration of the remote control code and the slave unit code corresponding to the remote control contents, and performs the operation according to the ON operation of the TR key. And transfer the registration code. In addition, it performs predetermined display control on the display unit 58A to perform channel display, registration screen display, and the like.

In addition to CH and FD ₁ to FD ₅ , RAM of microcomputer 18A, remote control channel up control, remote control channel down control, remote control volume up control, remote control volume down control, remote control CTCSS on control, remote control CTCSS
An area for storing a remote control code corresponding to each control content (definition) of the off control and first to third three child device codes is provided.

The other components are configured exactly the same as in FIG.

On the other hand, as shown in FIG.
4 is connected to a side of SW6, and D side is connected to b side of SW6.
The TMF encoder 130 is connected. The output side of SW6 is connected to transmitting section 66. When the DTMF encoder 130 receives the microcomputer 96A or the slave unit code, the DTMF encoder 130 creates a corresponding predetermined dual tone signal sequence and outputs the same to the transmission unit 66 for transmission.

The low-frequency amplifier circuit 94A incorporates an electronic volume as volume control means, and performs volume control according to volume control by the microcomputer 96A.

A tone detection / squelch circuit 132 as tone detection / squelch means is connected to the output side of the receiving unit 78. When the microcomputer 96A controls the CTCSS on, the specific frequency (first child The machine is f ₁ , the second handset is f ₂ ,
The third slave unit is assumed to be f ₃ ), and the squelch is not applied to the low-frequency amplifier circuit 94A while the tone signal is being detected, and the squelch is applied if the tone signal is not detected. It has become.

When CTCSS off control is performed by the microcomputer 96A, the tone detection / squelch circuit 132 does not perform squelch regardless of whether or not a tone signal of a specific frequency is detected.

PTT.SW106, rotary encoder 10
8. The key input unit 134 is connected in addition to the display unit 110A.
The key input unit 134 is provided with a CTCSS key, a volume up key, and a volume down key, and outputs a key-on signal according to an on operation of the operator.

The microcomputer 96A controls the switching between the reception mode and the transmission mode in conjunction with the on / off of the PTT.SW 106, performs the operation channel switching control according to the normal rotation pulse or the reverse rotation pulse input from the rotary encoder 108, The volume control of the electronic volume of the low-frequency amplifier circuit 94A is controlled by operating the volume up key or the volume down key, and the CTC for the tone detection / squelch circuit 132 is controlled by operating the CTCSS key.
Performs SS on / off control.

The microcomputer 96A performs operation channel switching control, volume adjustment control, and CTCSS on / off control according to various remote control codes input from the DTMF decoder 104, and also performs SW6 switching control and DTMF switching after a fixed time that differs for each slave unit. A different handset code is output to the encoder 130 for each handset.

Further, the microcomputer 96A performs display control such as channel display on the display unit 110A.

The RAM of the microcomputer 96A, addition of CH and FD ₁ ~FD _5, CTCSS
Flag P (0: off, 1: on) indicating the on / off state of
Stores the remote control code corresponding to each definition of remote control channel up control, remote control channel down control, remote control volume up control, remote control volume down control, remote control CTCSS on control, remote control CTCSS off control, and the remote unit code corresponding to the own device. An area is provided.

The other components are configured exactly the same as in FIG.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. 8 to 15 and the display state explanatory diagram of FIG.

It is assumed that the CH of the master unit 10A and all the slave units 60A are 3 in advance.

Microcomputer 18A of master unit 10A with initial setting of power switch on
Sets the receiving mode, switches SW1 to the a side, sets the operating channel to 3, and sets the channel display to 3 (step 300 in FIG. 8).

On the other hand, the microcomputer 96A of each slave unit 60A sets the power switch on in the initial setting of the power switch ON, sets the PTC to the CTCSS off state, sets the reception mode, switches the SW6 to the a side, sets the operation channel to 3, and sets the channel display to 3. (Steps in Fig. 13
600).

The operator of the base unit 10A talks while turning on the PTT.SW54, and the operator of each slave unit 60A speaks while turning on the PTT.SW106, so that the slave unit 60A from the master unit 10A and the master unit from the slave unit 60A. 10A can be contacted (steps 302 and 304 in FIG. 8, steps 602 and 604 in FIG. 13).

When remote control of the slave unit 60A is desired to be performed by the master unit 10A, first, turn on the SET key of the master unit 10A in order to assign a key used for remote control operation of the master unit 10A and perform user registration of the remote control code and the slave unit code. . Then, the microcomputer 18A determines YES in step 306 of FIG. 8, shifts to the flow of FIG. 9, and performs display control of the registration screen shown in FIG.
= 1 (steps 350 and 351).

On the left side of the screen, “ch up”, “ch down”, “Vol.u”
"p", "Vol.down", "CTC.ON", "CTC.OFF" and the characters indicating remote control contents, "Koki 1", "Koki
"2" and "Koki 3" are displayed.
"Key" and "code" characters are displayed in the upper right part of the screen.

At this time, a cursor is displayed at the position of the "key" of "ch up".

When assigning ten key 1 to remote control channel up control, the ten key 1 is turned on.

Since the cursor is located at the "key" position, the microcomputer 18A registers the numeric keypad 1 as an allocation key for remote control channel up control, and displays "1" at the position where the cursor has been located (steps 352 to 358). Then, the cursor is moved to the fourth digit at the position of the "code" of "ch up" (step 360).

In order to set the remote control code corresponding to the remote control channel up control to, for example, (3346), when the 3 key is turned on, 3 is registered as the fourth digit data of the remote control code, and the position where the cursor was located up to that point Is displayed on the screen, and the cursor is moved to the third digit (steps 352, 3
54, 362, 358, 360). Similarly, when the 3, 4, and 6 keys are turned on, the third to first digit data of the remote control code is obtained.
3,4,6 are registered. The code display becomes "3346", and the cursor moves to the position of the "key" on the second line.

Hereinafter, by performing the same operation, for example, the allocation key of the remote control channel down control is 2, the remote control code is (3347), the allocation key of the remote control volume up control is 3, the remote control code is (3482), and the remote control volume down control is Assign 4 keys and remote control code (348
3) The remote control CTCSS on control allocation key can be registered as 5, the remote control code as (1367), the remote control CTCSS off control allocation key as 5, and the remote control code as (1368).

For example, when the remote control volume down control is not performed, when the * key is turned on when there is a curl in the "key" position of "Vol.down", * is registered formally as an allocation key, but the microcomputer 18A In step 402 in FIG. 10, which will be described later, this * is processed without an allocation key.

When the remote control code related to the remote control CTCSS off control has been input, the cursor moves to the position of the “code” of “job 1”, so that the child device code relating to the first child device 60A is, for example, (5501). , 5,5,0,1 is turned on, then (5501) is registered as a slave unit code. Similarly, it is possible to register, for example, (5502) as the child device code relating to the second child device 60A and, for example, (5503) as the third child device code. When the first digit data of the third slave unit code is input, the cursor returns to the position of the "key" on the first line (see FIG. 16 (2)), and the previously registered assignment key, remote control code, child The machine code can be corrected.

After the registration operation is completed in this way, the remote control code corresponding to the remote control
In order to clone to the microcomputer 96A of 60A, first, the signal input / output terminal IO of the master unit 10A and the signal input / output terminal I of the first slave unit 60A
Connect O 'and turn on the TR key.

Then, the microcomputer 18A outputs a transfer permission request signal to the child device 60A, and waits for the input of a transfer permission signal from the first child device 60A (steps 364 to 368). When receiving the transfer permission request signal, the microcomputer 96A of the first child device 60A determines YES in step 602 of FIG. 13, and outputs a transfer permission signal to the parent device 10A (step 604).

The microcomputer 18A of the base unit 10A that has input the transfer permission signal is RAM
Are transferred to the first slave unit 60A (steps 368 and 370 in FIG. 9).
The microcomputer 96A of the first slave unit 60A that has received the code transfer
Registered in M (steps 606 and 608 in FIG. 13).

Thereby, the same remote control code and first child device code as those of parent device 10A are registered in first child device 60A. After registration is completed, the master unit 10A is connected to the second slave unit 60A, and when the TR key is turned on again, each remote control code and the second slave unit code are transferred to the second slave unit 60A (FIG. 9). Steps 372, 37
4, 364-370, steps 602-608 in FIG. 13)
When the master device 10A and the third slave device 60A are connected and the TR key is turned on again, each remote control code and the third slave device code
Is transferred to the child device 60A.

After the clone is completed, when the SET key of the master unit 10A is turned on again, the microcomputer 18A determines YES in step 376 of FIG. 9 and returns the registration screen display to the channel display (step 378). Return to step 306.

After the registration with the master unit 10A and each slave unit 60A is completed in this way, for example, when interference occurs from another business wireless system during operation on three channels, the operator of the master unit 10A
When the ten key 1 is turned on while the T.SW 54 is turned on, the microcomputer 18A first switches to the transmission mode by turning on the PTT.SW 54 (steps 302 and 304 in FIG. 8). YES is determined, and the process proceeds to the flow of FIG. 10 to determine whether PTT.SW54 is ON (step
400). In this case, since it is YES, the RAM is subsequently referred to to determine whether or not the key is an allocation key, and since it is YES, the corresponding remote control contents are checked (steps 402 and 404).

Here, C = CH
= 3, CH is set to 4 (steps 406 to 410), the channel display is changed to 4 (step 412), SW1 is switched to the b side, and the remote control code (3346) corresponding to the remote control channel up control is read from the RAM. Are output to the DTMF encoder 16 (steps 414 and 416).

The DTMF encoder 16 that has input the remote control code
A dual tone signal corresponding to each of the numerical values of 4 and 6 is created in order, and a dual tone signal sequence as a remote control signal is output to the transmitting unit 20.

The remote control signal is converted into an FM modulation signal on three channels by the transmission unit 20 and emitted from the antenna 32 as an FM radio wave.

Thereafter, the mode is switched to the reception mode (step 41).
8) The operating channel is switched to 4 (step 4)
20).

The FM radio waves in the three channels are received by the antenna 76 of each slave unit 60A, and the receiving unit 78 demodulates the remote control signal. The demodulated remote control signal is input to the DTMF decoder 104, which determines whether the correct dual-tone signal sequence is correct or not. If the determination result is correct, the original remote control code is decoded from the dual-tone signal sequence and sent to the microcomputer 96A. Is output.

When the remote control code is input, the microcomputer 96A determines YES at step 610 in FIG. 13, proceeds to the flow of FIG. 14, and first refers to the RAM to check the remote control content corresponding to the remote control code of (3346). In this case, since the remote control channel up control is performed, CH is set to 4 (steps 650 to 65).
4) After setting the channel display to 4, the operating channel is switched to 4 (steps 656 and 658).

Then, the transmission mode is set after waiting for a different time T _m (m corresponds to the slave unit number, and here, T ₁ <T ₂ <T ₃ is set) for each slave unit. With SW
6 is switched to the b side, and the slave unit code is output to the DTMF encoder 130 (steps 660 to 666).

The slave unit codes of the first to third slave units 60A are (550
1), (5502), and (5503).

The DTMF encoder 130 that has input the slave unit code creates a corresponding dual tone signal sequence, outputs it to the transmitting unit 66, and transmits it to the master unit 10A. Thereafter, the reception mode is set and the switch SW6 is returned to the side a (step 668), and the process returns to step 602 in FIG.

Note that, when a parent device 10A emits a remote control signal when the PTT.SW 106 is on or when the radio wave condition is deteriorated even when the PTT.SW 106 is off,
Since the decoder 104 does not output the remote control code, the microcomputer 96A does not determine YES in step 610 of FIG. 13, the three operating channels remain, and the slave unit code is not transmitted.

The microcomputer 18A of the master unit 10A receives the
After changing to the channel, the process waits for the input of a handset code from each handset 60A for a certain period of time (step 420). First, when the dual tone signal sequence relating to the first slave code transmitted from the first slave 60A at the frequency of four channels is received and input to the DTMF decoder 122, the first slave code is decoded. Is input to the microcomputer 18A. Similarly, when a dual tone signal sequence related to the second slave unit code and the third slave unit code is received in the order of the second slave unit 60A and the third slave unit 60A, each slave unit code is converted to the microcomputer. Input to 18A.

When the slave unit code is input, the microcomputer 18A displays the corresponding slave unit number (step 424), and then all the slave units 60A
It is determined whether or not a cordless handset code has been input from
6) If YES, display "OK" for a certain period of time, return to the channel only display, switch SW1 to the a side, set the transmission mode (steps 428 to 432), and return to step 306 in FIG.

As a result, the operation channels of the master unit 10A and all the slave units 60A are changed to 4, and thereafter, communication can be performed without any interference.

If, for example, the second handset 60A does not receive the remote control signal and the second handset code is not transmitted (the second handset 60A remains in three channels), the microcomputer 18A Determines NO in step 426 in FIG. 10, switches to the transmission mode (step 434), creates frequency division ratio data based on FD _c = FD ₃ , and outputs the data to the PLL circuit 28 to set the operating channel to 3 (Step 436), and the remote control code related to the remote control channel up control is transferred to the DTMF encoder.
16 to transmit a corresponding remote control signal (step 438).

Then, the mode is switched to the reception mode, and the operation channel is set to 4
Wait for the input of the slave unit code (steps 440 to 446).

When the remote control signal is normally received by the second handset 60A, the second handset 60A changes to channel 4 and transmits the second handset code. When the microcomputer 18A inputs the slave unit code, the corresponding slave unit number is additionally displayed, and since the slave unit codes have been transmitted from all the slave units 60A together with the first time, the process proceeds to the aforementioned step 428 (step 4).
48, 450).

When the remote control code is not transmitted again from the second remote control 60A even when the remote control signal is transmitted again, the microcomputer 18A determines NO in step 450, displays "NG" for a certain period of time, and then displays only the channel, Switch SW1 to the a side to set the transmission mode (steps 452, 430, 432).

In the same manner, when the operating channel is 4, the master unit 10
If the numeric keypad 1 is turned on while the PTT.SW 54 is turned on on the A side, the operation channel of the entire system becomes 5. vice versa,
When the ten key 2 is turned on while the PTT.SW 54 is turned on on the master device 10A side, the operation channel of the entire system returns to 3.

In this way, the channel switching control of all the slave units 60A can be performed by the remote control operation of the master unit 10A, so that the operation channel can be controlled as intended by the master unit 10A without contacting the slave unit 60A and waiting for the operation of the other party. Can be changed.

If the master unit 10A wants to switch channels independently, by turning the channel switching knob 59 with the PTT.SW 54 turned off, the master unit 10A can be switched in the same manner as in FIG.
It is possible to switch the operating channel only for A,
Regarding the slave unit 60A, regardless of the ON / OFF state of the PTT.SW 106, turning the channel switching knob 112 enables each slave unit 10A to individually switch the operation channel in the same manner as in FIG. it can.

On the other hand, for example, when operating the system on three channels, the noise in the use environment of the system has increased, and the operator of the master unit 10A wants to increase the reception volume of each slave unit 60A to prevent missed communication. Turn on the numeric keypad 3 while turning on PTT.SW54. Then, after switching to the transmission mode (steps 302 and 304 in FIG. 8), the microcomputer 18A
YES is determined in step 308 of FIG. 10 and steps 400 and 402 of FIG. 10, and since the three keys are assigned keys for remote control volume up control, the process proceeds to step 500 of FIG. 11 (step 404), and SW1 is set to the b side. Switch the remote control code for the remote control volume up control to DTMF encoder 16
And the corresponding remote control signal is transmitted (step 502).

Then, the mode is switched to the reception mode (step 504), and input of a slave unit code is waited for (step 506).

In each child device 60A, when the remote control signal is received, the remote control code is input from the DTMF decoder 106 to the microcomputer 96A. The microcomputer 96A checks the control content corresponding to the remote control code (step 610 in FIG. 13, step 6 in FIG. 14).
50) In this case, since the remote control volume up control is performed, the volume up control for one step is performed on the low frequency amplifier circuit 94A (step 670), and a different T _{m is} set for each slave unit 60A.
After waiting for a while, the mode is set to the transmission mode, and SW6 is switched to the b side, and the slave unit code is output to the DTMF encoder 130 to transmit the corresponding dual tone signal sequence (steps 660 to 666). Then switch to receive mode and switch SW6
Is returned to the a side (step 668). The low frequency amplification circuit 94A that has received the volume up control increases the volume.

Since the parent device 10A is in the reception mode, the dual tone signal sequence transmitted from each child device 60A is received, and the DTMF decoder 122
The slave device code is decrypted and output to the microcomputer 19A.
The microcomputer 18A displays the number of the slave unit 60A that has entered the slave unit code, and if there is a slave unit code input from all the slave units 60A, displays "OK" for a certain period of time, then returns to the channel only display and transmits The mode is switched to SW1, and the switch SW1 is returned to the side a (steps 506 to 516 in FIG. 11).

If there is no slave unit code transmitted from any of the slave units 60A and NO is determined in step 510, "NG" is set for a certain period of time.
Display is made (step 518).

In this way, the volume of each child device 60A can be increased by remote control, so that the contact of the parent device 10A can be prevented from being overlooked.

Similarly, by turning on the numeric keypad 3 while turning on the PTT.SW54 on the master unit 10A side, the volume of the slave unit 60A can be further increased by one step. Conversely, the numeric keypad is turned on while the PTT.SW54 is turned on. When 4 is turned on, the volume of the slave unit 60A is set to 1
Steps can be reduced.

In this way, the volume control of all the slaves 60A can be controlled by operating the remote control of the master 10A, so that all the slaves can be controlled as intended by the master 10A without contacting the slave 60A and waiting for the operation of the other party. You can adjust the audibility of communication on the machine 60A.

If the master device 10A wants to adjust its own volume, it turns on the volume up key. The microcomputer 18A determines YES in step 310 of FIG. 8, and performs volume adjustment control on the electronic volume of the low-frequency amplifier circuit 48A to increase the volume by one step (step 312). Conversely, when the volume down key is turned on, the microcomputer 18A determines YES in step 314 of FIG. 8, and reduces the volume by one step (step 316).

When each of the slave units 60A similarly turns on the volume up key, the microcomputer 96A determines YES in step 612 in FIG. 13, performs volume adjustment control on the electronic volume of the low-frequency amplifier circuit 94A, and increases the volume by one step. (Step 61
Four). Conversely, when the volume down key is turned on, the microcomputer 96A determines YES in step 616 of FIG. 13, and reduces the volume by one step (step 618). This allows each child device 60A to adjust its own volume.

Separately, for example, when the master unit 10A wants to communicate with each slave unit 60A one-on-one while operating with CTCSS off by three channels, turning on the PTT.
Turn on. Then, after switching to the transmission mode (steps 302 and 304 in FIG. 8), the microcomputer 18A determines YES in step 308 in FIG. 8 and steps 400 and 402 in FIG. 10, and the numeric keypad 5 turns on the remote control CTCSS on control. Move to step 520 in FIG. 11 because the key is the assignment key (step 40
4), SW1 is switched to the b side, and a remote control code related to remote control CTCSS ON control is output to the DTMF encoder 16, and a corresponding remote control signal is transmitted (step 522).

Then, the mode is switched to the reception mode (step 524), and input of a slave unit code from each slave unit 60A is waited for (step 52).
6).

In each of the slave units 60A, when the remote control signal is received, the remote control code is input from the DTMF decoder 104 to the microcomputer 96A. The microcomputer 96A checks the contents of the control corresponding to the remote control code (step 610 in FIG. 13 and step 650 in FIG. 14). "CTCSS O
After allowed to N "display performs CTCSS ON control to tone detection / squelch circuit 132 (step 672-678), the SW6 while only waited transmission mode different T _m for each child devices 60A to side b Switching, cordless handset code DTMF encoder 1
30 to transmit a corresponding dual tone signal sequence (steps 660 to 666).

Then, the switch SW6 is returned to the side a to set the reception mode (step 668).

Tone detection / squelch circuit 1 with CTCSS ON control
32, thereafter, when the tone signal of the specific frequency separately defined for each slave unit 60A is not detected, squelch is applied to the low-frequency amplifier circuit 94A, and the output of the sound from the master unit 10A is blocked.

Since the parent device 10A is in the reception mode, the dual tone signal sequence transmitted from each child device 60A is received, and the DTMF decoder 122
The slave device code is decrypted and output to the microcomputer 18A.
The microcomputer 18A displays the number of the slave unit 60A that has entered the slave unit code, and if there is a slave unit code input from all the slave units 60A, displays "OK" for a certain period of time, then returns to the channel only display and transmits The mode is switched, and SW1 is returned to the a side (steps 526 to 530 and 512 to 516 in FIG. 11).

If there is no slave unit code transmitted from any of the slave units 60A and NO is determined in step 530, the transmission mode is set, the remote control code related to the remote control CTCSS on control is output to the DTMF encoder 16 again, and the corresponding remote control signal is transmitted. After the transmission of the remote control signal, switch to the reception mode and wait for the input of the slave unit code. If there is an input, the corresponding slave unit number is additionally displayed. Click OK when the cordless handset code has been sent.
Display is performed (steps 532 to 542 and 512).

In this way, after performing remote controller CTCSS on control for each slave unit 60A, if, for example, it is desired to communicate only with the first slave unit 60A, the PTT.
Turn on the numeric keypad 1 while turning on the key. When the numeric key 1 is turned on, the microcomputer 18A proceeds to step 308 in FIG.
Is determined to be YES, and the flow proceeds to the flow of FIG. 10. However, since the PTT.SW54 is off, it is determined whether the CTCSS key is simultaneously turned on at the same time (steps 400 and 454).
It moves to the flow of FIG. 2 and determines whether the numeric keypad turned on is in any one of 1 to 3 (step 550). Since it is YES in this case, the numerical value of the numeric keypad is registered as S (step 552), and the frequency f _s = f ₁ for the tone signal generator 120.
Control (step 554), and "CTC
“SS ON” and “1” indicating the slave unit number are displayed, and the process returns to step 306 in FIG. 8 (steps 554 and 556).

Tone signal generator 120 generates a tone signal of frequency f ₁ receives the tone signal generation control.

Therefore, when the master unit 10A is transmitted on the PTT.SW54, mixed signal tone signal and the audio signal of the frequency f ₁ is transmitted as an FM-modulated signal.

In the first slave unit 60A that has received the FM modulation signal, the mixed signal is demodulated by the receiving unit 78 and then output to the low-frequency amplifier circuit 94A and the tone detection / squelch circuit 132. When tone detection / squelch circuit 132 of CTCSS ON state while detecting the tone signal f ₁ in the input signal, the low frequency amplifier circuit
Do not squelch 94A.

Thereby, the sound of master device 10A can be heard from speaker 98.

At this time, the second and the third handset 60A, since each tone signal f ₂ and f ₃ to tone detection / squelch circuit 132 is not input, the squelch consuming base unit 10A and the first handset 60A I can't hear the audio.

As a result, the master unit 10A and the slave unit 60A can communicate with each other on a one-to-one basis.

If the base 60A is them on 2 of the numeric keypad while turning on the CTCSS key, since the tone signal generator 120 generates the tone signal having the frequency f _2, you can only contact the second handset 60A, C
If on the third numeric keypad while on the TCSS key tone signal generator 120 so to generate a tone signal of a frequency f _3, you can contact only with the third handset 6A.

When the master unit 60A wants to stop generating a tone signal, it turns on the numeric keypad 0 while turning on the CTCSS key. Then, the microcomputer 18A performs tone signal stop control on the tone signal generator 120 to stop the generation of the tone signal, and stops displaying "CTCSS ON" and the slave unit number (steps 308 and 10 in FIG. 8).
Steps 400 and 454 in FIG. 12, Steps 550 and 558 to 56 in FIG.
2).

When remote control CTCSS off control is desired for each slave unit 60A, ten key 6 is turned on while PTT.SW54 is turned on. Then, in the same manner as described above, a remote control signal related to the remote control CTCSS off control is transmitted under the control of the microcomputer 18A (steps 302, 304, 308, 400 to 404, and 11 in FIG. 8).
Figure steps 544, 546).

When each of the slave units 60A receives this, the microcomputer 96A performs CTCSS off control on the tone detection / squelch circuit 132, so that CTCSS is released (step 610 in FIG. 13, steps 650, 680 to 680 to 680 in FIG. 14). 686).

Thereby, the parent device 10A can contact all the child devices 10A at once thereafter.

In this way, the remote control 6
Since the CTCSS on / off control of 0A can be performed, it is possible to perform simultaneous communication to all the slaves 60A and one-to-one communication with each slave 60A as intended by the master 10A without contacting the slave 60A and waiting for the operation of the other party. One to one
Can be contacted individually.

Each of the slave units 60A can turn on and off the CTCSS arbitrarily by turning on the CTCSS key. For example, if the CTCSS key is turned on in the CTCSS off state (P = 0), the microcomputer 96A determines YES at step 620 in FIG. 13, moves to the flow of FIG. After displaying “CTCSS ON”, the tone detection / squelch circuit 13
CTCSS ON control is performed for 2 (steps 700 to 706). Therefore, only when a tone signal having a frequency determined for each child device 60A is input from the parent device 10A side, the sound of the parent device 60A can be heard.

Conversely, if the CTCSS key is turned on while the CTCSS is on (P = 1), the microcomputer 96A proceeds to step 620 in FIG.
After determining S, the process proceeds to the flow of FIG. 15, and after inverting P to 0 and turning off the display of "CTCSS ON", CTCSS off control is performed on the tone detection / squelch circuit 132 (step 70).
0, 702, 708, 710). Therefore, the voice of master device 60A can be heard regardless of the presence or absence of the tone signal.

According to this embodiment, the master unit 10A and the three slave units 60A can switch the operating frequency among a plurality of predetermined channels, and the low frequency amplifier circuit 94A of each slave unit 60A is controlled by the microcomputer 96A. An electronic volume for adjusting the volume is incorporated, and the master unit 10A has a tone signal generator 120 that generates a tone signal according to a slave unit selection operation using a CTCSS key and a numeric keypad, and is generated by the tone signal generator 120. The transmitted tone signal is mixed with the sound signal output from the microphone 12
In the wireless system in which the tone detection / squelch circuit 132 is provided on the audio signal output side of the reception 78, each of the slave units 60A is connected to the input side of the transmission unit 20 of the master unit 10A via SW1.
The DTMF encoder 16 is provided, and the microcomputer 18A treats the ON operation of two specific numeric keys while the PTT.SW54 is ON as the remote control channel up operation and the remote control channel switching operation of the down operation, and the remote control channel switching according to these operations A remote control code corresponding to the control is output to the DTMF encoder 16 to create a dual tone signal sequence as a remote control signal, output to the transmission unit 20 for transmission, and the base unit 10A according to a remote control channel switching operation. It controls the switching of its own operation channel, and also controls the on / off operation of specific four numeric keys while the PTT.SW54 is on, the remote control volume up / down remote control volume control operation, and the remote control CTCSS on / off operation And handles remote control according to these operations The remote control code is output to the DTMF encoder 16 to create a dual tone signal sequence as a remote control signal and output to the transmission unit 20 for transmission, while the DTMF is output to the output side of the reception unit 78 of each slave unit 60A. The decoder 104 is connected, and when the remote control signal is received by the receiving unit 78, the remote control code is decoded by the DTMF decoder 104 and output to the microcomputer 96A.
6A controls the switching of the operating channel when the remote control code for the remote control channel switching control is input, performs the volume control for the electronic volume when the remote control code for the remote control volume control is input, and controls the remote control for the remote control CTCSS on / off control. When the code is input, the CTCSS on / off control for the tone detection / squelch circuit 132 is performed so that the operation channel can be changed as intended by the master unit 10A without contacting the slave unit 60A and waiting for the operation of the other party. You can switch to perform communication without interference, adjust the volume of the slave unit 60A side so that you will not miss the contact due to the noise of the use environment, and turn on / off CTCSS to securely perform individual communication or simultaneous communication Become like

In addition, since the user of the system can arbitrarily assign ten keys for performing each remote control operation, good operability can be obtained by selecting an easy-to-operate key, and furthermore, a remote control required by the user can be obtained. Since only control can be selected, it is possible to prevent unintended remote control from being performed by an incorrect key operation.

In the above-described embodiment, three slave units are used for simplicity. However, the present invention can be similarly applied to a system of two or four or more units.

In both the first embodiment and the second embodiment, two-way communication between the master unit and the slave unit is possible.
The slave unit can be applied to a system capable of only one-way communication from the master unit to the slave unit by providing only the receiving unit.

Also, the circuit configurations of the transmission units 20 and 66 and the reception units 34 and 78 shown in FIGS. 1, 2, 6, and 7 are merely examples, and the transmission configurations of other circuit configurations are illustrated. It goes without saying that the remote control code may be used for the modulation and demodulation other than the DTMF method.

[Effect of the invention]

According to the wireless system of the present invention, the base unit includes channel switching operation means for performing a channel switching operation;
When a channel switching operation is performed by the channel switching operation unit while transmission is instructed by the transmission instruction operation unit, the channel switching operation is treated as a remote control channel switching operation, and a remote control signal corresponding to the remote control channel switching control according to the operation is transmitted. Create and output to the sending / receiving means and send it, and when a response signal from any of the slave units is not received by the sending / receiving means, create a remote control signal again and perform the same operation as when the previous remote control signal was sent A remote control signal generating means for outputting to and transmitting to the transmission / reception means set in the channel; and, when a channel switching operation is performed by the channel switching operation means while transmission is not instructed by the transmission instruction operation means, the operation is performed. Operating channel for controlling the switching of the operating channel of the transmitting / receiving means according to the A switching control unit, while the transmission by the transmission instruction operation means is instructed, when the channel switching operation is performed by the channel switching operation means,
After the remote control signal is transmitted by the remote control signal generating means, the operation channel of the transmission / reception means is switched according to the channel switching operation so that the transmission / reception means can receive the response signal from the slave unit. When the response signal is received from all the slave units, the current operation channel is maintained, and when the response signal is not received from any of the slave units by the transmission / reception means, the switching control of returning the operation channel of the transmission / reception means to the original operation channel. And a second operation channel switching control means for enabling the remote control signal generation means to transmit the remote control signal again, and thereafter, controlling the switching of the operation channel of the transmission / reception means in accordance with the channel switching operation, Each slave unit is provided with channel switching operation means for performing a channel switching operation, and channel switching operation. When a channel switching operation is performed by the control unit, a first operating channel switching control unit that controls switching of an operating channel of the transmitting / receiving unit in accordance with the operation, and a remote control signal is received by the transmitting / receiving unit. And decoding means for decoding the contents of the remote control, and when the decoding means can decode that the contents of the remote control are the switching of the remote control channel, the control signal is switched after the control of the operating channel of the transmitting / receiving means and a response signal is generated. And a second operation channel switching control means for outputting to the transmission / reception means and transmitting the operation channel. By simply performing a switching operation, the intent of the master unit user can be reached without contacting the slave unit and waiting for the other party's operation. Ri, the parent machine,
Both slave units can switch the operation channel and perform communication without interference.

Then, in the first transmission of the remote control signal from the master unit to each slave unit, if the operation channel of any slave unit cannot be correctly changed, the operation channel is automatically switched to the original operation channel without re-operating the remote controller. Since the remote control signal is retransmitted from the parent device, the operation channel of each child device can be reliably changed as intended by the parent device. Moreover, the transmission and reception of the response signal between the slave unit and the master unit are performed after both the slave unit and the master unit perform the switching control of the operating channel in accordance with the remote controller channel switching operation.
Rather than sending and receiving a response signal with the original operating channel,
The master unit can reliably grasp that the slave unit has been switched to the new operation channel, and the reliability of the switching control is improved. If a response signal is transmitted and received with the original operation channel, when a certain child device transmits a response signal and then tries to switch the operation channel and makes a mistake in switching the operation channel due to noise or the like, the parent device The child device recognizes that the operation channel has been switched.
Therefore, if all the other slave units have also transmitted the response signals, the remote control signal is not resent. As a result, a slave unit whose operation channel is inconvenient to the master unit occurs.

In addition, if the channel switching operation is performed without performing the transmission instruction operation on the master unit, the operation channel can be switched only for the master unit. If the channel switching operation is also performed on the slave unit, the operation channel can be switched only for the slave unit. If the operation channel of the master unit and the slave unit are shifted for some reason, the master unit manually adjusts to the operation channel of the slave unit, or the slave unit manually adjusts the operation channel of the master unit. By returning to the operating channel, it is possible to easily return to the normal operating state. Moreover,
The transmission instruction on the master unit means active work on the slave unit, but a transmission instruction operation is required when performing a remote control channel switching operation on the slave unit, and a transmission instruction operation is performed when performing a channel switching operation on the master unit itself. Since the instruction operation is not required, the operation of switching the channel by linking the master unit and the slave unit and the operation of switching the channel only by the master unit can be surely performed.

According to another wireless system of the present invention,
Operation means for performing a remote control volume adjustment operation, and remote control control signal generation for generating a remote control signal corresponding to the remote control volume adjustment control in accordance with the operation of the operation means, outputting the signal to a transmission means (or transmission / reception means), and transmitting the signal Means for decoding the contents of the remote control when the remote control signal is received by the receiving means (or the sending / receiving means), and the decoding result by the decoding means is used for controlling the volume of the remote control. When controlling, by providing a volume adjustment control means for performing volume adjustment control to the volume adjustment means, without contacting the slave unit and waiting for the other party's operation, the slave unit side as intended The volume can be adjusted so that you don't miss a call due to the noise of the usage environment.

According to still another wireless system of the present invention, there is provided a transmitting / receiving means connected to a microphone and a speaker, and a tone signal generating means for generating a tone signal according to a slave unit selecting operation, A tone signal generated by the generating means is mixed with an audio signal output from the microphone and output to the transmitting / receiving means, and an audio signal output side of the transmitting / receiving means connected to the microphone and the speaker is provided. Tone detection / squelch means for detecting the presence / absence of a tone signal addressed to the own device, and for stopping or canceling the audio output depending on whether there is a tone signal addressed to the own device, With a plurality of slave units having a, the base unit creates an operation means for performing a remote control CTCSS on / off operation, and a remote control control signal corresponding to the remote control CTCSS on / off control according to the operation with the operation means Send / Receive Output to the transmission means, and when a response signal from any of the slave units is not received by the transmission / reception means, create a remote control signal corresponding to the remote control CTCSS on / off control again and output to the transmission / reception means for transmission. Remote control control signal generating means for causing each of the slave units to decode remote control control contents when the remote control signal is received by the transmission / reception means, and the decryption result by the decoding means to turn on the remote control CTCSS. • Creates and sends a response signal during off control. The response means to output and transmit to the receiving means and the decryption result by the decryption means
When off control, CT for tone detection / squelch means
CTCSS on / off control means for performing CSS on / off control,
By using the remote control operation of CTCSS on / off on the master unit, CTCSS can be turned on / off as intended by the master unit without contacting the slave unit and waiting for the other party's operation. Individual communication and simultaneous communication can be performed reliably.

Then, in the first transmission of the remote control signal from the master unit to each slave unit, if the CTCSS cannot be correctly turned on / off for any slave unit, the remote control signal is automatically transmitted without re-operating the remote controller. Will be resent,
CTCSS on / off of each slave unit can be reliably changed as intended by the master unit side.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a master unit according to a first embodiment of the present invention, and FIG. 2 shows a configuration of a slave unit according to the first embodiment of the present invention. FIGS. 3 and 4 are flowcharts showing the operation of the microcomputer in FIG. 1, FIG. 5 is a flowchart showing the operation of the microcomputer in FIG. 2, and FIG. FIG. 7 is a block diagram showing a configuration of a parent device according to the second embodiment of the present invention, FIG. 7 is a block diagram showing a configuration of a child device according to a second embodiment of the present invention, and FIGS. 13 to 15 are flowcharts showing the operation of the microcomputer in FIG. 7,
FIG. 16 is an explanatory diagram showing a display state of the display unit in FIG. Explanation of main symbols 10, 10A: master unit, 12, 62: microphone, 16, DTMF encoder, 18,
18A, 96, 96A: microcomputer, 20, 66: transmitter, 34,
78: Receiver, 50, 98: Speaker, 54, 106: PTT.SW, 56: Rotary encoder, 59: Channel switching knob, 94A:
Low frequency amplifier, 104: DTMF decoder, 120: tone signal generator, 124: key input unit.

Claims (3)

(57) [Scope of request for utility model registration] 1. A transmission / reception means connected to a microphone and a speaker, the transmission / reception means being in a transmission mode when transmission is instructed by a transmission instruction operation means, and in a reception mode when transmission is not instructed. And a transmission / reception unit connected to a microphone and a speaker. The transmission / reception unit is in a transmission mode when transmission is instructed by the transmission instruction operation unit, and is received when transmission is not instructed. In a wireless system including one or a plurality of slave units in a mode, the master unit includes a channel switching operation unit for performing a channel switching operation, and a channel switching operation unit for performing transmission while the transmission instruction operation unit instructs transmission. When a switching operation is performed, it is treated as a remote control channel switching operation, and the remote control channel switching control corresponding to the operation is performed. Creates a remote control signal and sends it to the sending / receiving means for transmission.If a response signal from any of the slave units is not received by the sending / receiving means, create a remote control signal again and send the previous remote control signal. Remote control signal generating means for outputting and transmitting to the transmitting / receiving means set to the same operation channel as at the time, and channel switching operation is performed by the channel switching operation means while transmission is not instructed by the transmission instruction operation means. A first operation channel switching control means for controlling the switching of the operation channel of the transmission / reception means in response to the operation; and a channel switching operation by the channel switching operation means while transmission is instructed by the transmission instruction operation means. Is performed, after the remote control signal is transmitted by the remote control signal generating means, The switching of the operation channel of the transmission / reception means according to the switching operation is performed so that the transmission / reception means can receive a response signal from the slave unit, and if response signals are received from all the slave units, the current When the operation channel is maintained and the response signal is not received from any of the slave units by the transmission / reception means, the switching control for returning the operation channel of the transmission / reception means to the original state is performed, and the remote control signal is generated again by the remote control signal generation means. A second operation channel switching control means for enabling transmission and thereafter controlling the switching of the operation channel of the transmission / reception means in accordance with the channel switching operation. When a channel switching operation is performed by the operation unit and the channel switching operation unit, transmission / reception is performed according to the operation. First operation channel switching control means for controlling the switching of the operation channel of the means, decoding means for decoding the remote control content when the transmission / reception means receives the remote control signal, and remote control content for the decoding means for the remote control Second channel switching control means for controlling the switching of the operating channel of the transmitting / receiving means when the control channel switching control has been decoded, generating a response signal, outputting the response signal to the transmitting / receiving means, and transmitting the response signal; And a wireless system. 2. A master unit having transmitting means (or transmitting / receiving means) connected to a microphone (or microphone and speaker), and receiving means (or transmitting / receiving means) connected to a speaker (or microphone and speaker). ) And volume control means provided on the output side of the audio signal of the reception means (or transmission / reception means). Operating means to be performed, and a remote control signal corresponding to a remote control volume adjustment control in accordance with an operation of the operating means, and transmitting means (or transmitting / receiving means).
Remote control control signal generating means for outputting and transmitting the remote control signal to the receiving means), wherein each of the slave units decodes the content of the remote control when the receiving means (or the transmitting / receiving means) receives the remote control signal. When the decoding result by the decoding means is the remote control volume adjustment control,
And a volume adjustment control unit that performs volume adjustment control on the volume adjustment unit. 3. A tone signal generated by the tone signal generation means, comprising: transmission / reception means connected to a microphone and a speaker; and tone signal generation means for generating a tone signal in accordance with a handset selection operation. Is mixed with the audio signal output from the microphone and output to the transmission / reception means, and the audio signal output side of the transmission / reception means connected to the microphone and the speaker is provided with a tone addressed to the own apparatus. A plurality of slave units having tone detection / squelch means for detecting the presence / absence of a signal and for inhibiting or canceling the audio output in accordance with whether or not there is a tone signal addressed to the own unit. The master unit creates operation means for performing on / off operation of the remote controller CTCSS, and creates a remote control signal corresponding to the on / off control of the remote controller CTCSS in accordance with the operation of the operation means, and outputs to the transmission / reception means for transmission. Let one If the response signal from the slave unit is not received by the sending / receiving means,
Remote control control signal generating means for generating a remote control signal corresponding to the on / off control, outputting the signal to the transmission / reception means, and transmitting the signal to each transmission / reception means. A decryption means for decrypting the contents of the remote control and the remote control; a response means for generating a response signal when the decryption result obtained by the decryption means is the remote control CTCSS on / off control, outputting the response signal to the transmission / reception means, and transmitting the response signal; And CTCSS on / off control means for performing CTCSS on / off control for tone detection / squelch means when the result of decoding is remote control CTCSS on / off control.