JP6861861B1 - Voice wireless communication system and wireless communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a three-way simultaneous call without increasing the number of channels used in a voice wireless communication system in which a crane operator, an observer and an operator carry a wireless communication device at a construction site or the like to ensure work safety. To realize. SOLUTION: Each wireless communication device 10,30A of a crane operator and an observer transmits and receives an audio signal on a double-credit pair channel (421 MHz band / 440 MHz band-CH1) and a single-credit channel (422 MHz band-). The reception / demodulation unit of ch2) is provided, and the audio signal on the receiving side in the pair channel and the received audio signal in the single credit channel are combined and output. Each of the wireless communication devices 50a to 50n of each worker a to n includes a receiving unit of each of the channels to synthesize and output each received audio signal, and also includes a transmitting unit of the PTT method to provide the simple credit channel. After executing carrier sense in the receiving unit of, the voice signal of the worker is transmitted. [Selection diagram] FIG. 7

Description

The present invention relates to a voice wireless communication system capable of simultaneous three-way communication and a wireless communication device used in the system.

Traditionally, large cranes have been used to lift building materials at construction and construction sites of large-scale structures and buildings, but not only crane operators but also crane operators can ensure safety related to lifting work. Since a large number of people are involved, such as observers who watch over the entire site and call attention as appropriate, and various workers who perform slinging and guidance, cooperation among them is effective and smooth by a method suitable for the site. It is necessary to

Therefore, a voice-wireless communication system has been developed in which a crane operator, an observer, and a worker carry a wireless communication device for business use and can make a three-way simultaneous call with each other by a duplex method.
The simplest system is a system in which a crane operator carries two wireless communication devices and communicates independently with each wireless communication device on the observer side and the worker side by a duplex method. The two wireless communication devices carried by the crane operator are connected by an adapter with a headset for tripartite communication.
The adapter synthesizes the voice signals of the three parties, and the synthesized voice signals are transmitted to the observer and the operator, while the crane operator also listens to the synthesized voice, so that the three-party simultaneous call is realized. ing.

Further, Patent Document 1 below discloses a wireless communication system capable of simultaneous three-way communication as shown in FIGS. 13 and 14.
The wireless communication system of FIG. 13 includes a master unit 210 that operates as a repeater and three slave units 220-1 to 220-1 to 3.
Here, the master unit 210 performs carrier sense (CS) with the receiving means (RX21-4), transmits a radio signal with a predetermined pair channel (CH0) (TX23), and the pair channel (CH0). Each receiving means (RX21-1 to 3) for receiving each radio signal of three channels (440MHz band-CH1, CH2, CH3) different from the above, and each receiving means (RX21-1 to 3) received by those receiving means (RX21-1 to 3). It is composed of a signal synthesizing means 211 that synthesizes each audio signal obtained by demodulating a radio signal and outputs it to a transmitting means (TX23).
On the other hand, each of the slave units 220-1 to 220 is described above together with the receiving means (RX11-1: CH1, CH2, CH3) for carrier sense (CS) and the receiving means (RX11-2: CH0) for communication. It is equipped with transmission means (TX13: 440MHz band-CH1 / CH2 / CH3) corresponding to the channels (440MHz band-CH1, CH2, CH3) of each reception means (RX21-1 to 3) of the master unit 210.

Therefore, if there is no reception input at the frequency in the carrier sense (CS) of the master unit 210, each slave unit 220-1 to 220 has no reception input at the frequency in the carrier sense (CS). On the condition that, it is possible to make a simultaneous call between the slave units by the duplex method.
Although the number of slave units is three in FIG. 13, if the master unit 210 side adds a receiving means in the 440 MH band, simultaneous communication in a duplex system in which four or more slave units participate is possible. ..

Further, the wireless communication system of FIG. 14 is intended to realize three-way simultaneous communication between slave units without requiring a master unit as a repeater as described above.
The first slave unit 230 includes a transmitting means (TX13) and a receiving means (RX11-1: also executing carrier sense) for transmitting and receiving radio signals on a predetermined pair channel (421MHz band-CH1, 440MHz band-CH1), and their means. A receiving means (RX11-2) related to a channel (440MHz band-CH2) different from the pair channel (CH1) and two signal combining means 231,232 are provided, and the receiving means (RX11-1), (RX11-2) are provided. Each voice signal obtained by demolishing the radio signal received by is synthesized by the signal synthesis means 231 and output to the speaker 233, and the voice signal synthesized by the signal synthesis means 231 and the voice signal input from the microphone 234 are combined. It is synthesized by the signal synthesizing means 232 and output to the transmitting means (TX13).
The second handset 240 simultaneously talks with the first handset 230 by a receiving means (RX11-1: 421MHz band-CH1) and a transmitting means (TX13: 440MHz band-CH1) that also serve as a carrier sense (CS). I do.
The third slave unit 241 has a receiving means (RX11-1: 421MHz band-CH2) for carrier sense (CS), a receiving means (RX11-2: 421MHz band-CH1) for communication, and a transmitting means (TX13: 440MHz). Band-CH2) makes a simultaneous call with the first slave unit 230.

According to the wireless communication system of FIG. 14, since voice information can be shared between the second and third slave units by synthesizing the voice signals in the first slave unit 230, simultaneous three-way communication by the duplex method is realized. it can.
Further, if the receiving means (RX11-2: 440MHz band-CH2) of another channel is provided in addition to the receiving means (RX11-2: 440MHz band-CH2) on the first slave unit 230 side, four units are provided. Simultaneous calls between the above slave units are also possible.

The master unit 210 and the slave units 220-1 to 3,230,240,241 in the wireless communication systems of FIGS. 13 and 14 are wireless telephones that perform voice communication among the specified low power radio stations specified in Non-Patent Document 1 below. It is a wireless communication device that is equivalent to radio equipment for use and is capable of transmitting and outputting a transmission antenna power of 10 mW by executing carrier sense.

Japanese Patent No. 6072337

Association of Radio Industries and Businesses, "Specified Low Power Radio Station / Radio Equipment for Radio Telephones / Standards", RCR STD-20 4.1 Edition, revised on November 30, 2005

By the way, when the construction site is large, various work is done in places other than the crane installation location, and it is not only necessary to have close communication between the crane operator and the observer, but also direct. In addition to slinging and guiding workers involved in lifting work, other workers scattered over a wide area often need to communicate with the crane operator.
For example, other workers, such as those who manage the entry / exit of vehicles on the loading path of building materials and those who manage construction at construction sites near the crane installation location, also have a relationship with lifting work. In some cases, it may be necessary to interrupt the communication between the crane operator and the observer to ensure safety. In particular, such cases often occur at construction sites where the visibility from the crane operator is poor.

Therefore, the wireless communication system of FIG. 13 corresponds to a large number of slave units having transmission means of different transmission channels, and the wireless communication system of FIG. 14 also has a different channel in addition to the third slave unit 241. It will be supported by providing 4th, 5th, and so on slave units equipped with transmission means, but in the case of the wireless communication system shown in FIG. 13, the slave unit 220-n is attached to the master unit 210 as a repeater. The receiving means (RX21-n) must be added by the number of additional units (n = 4, 5, 6 ...), And similarly, in the case of the wireless communication system of FIG. 14, the fourth and subsequent units are added. The receiving means corresponding to the transmission channel of the slave unit must be added to the first slave unit 230.

On the other hand, in crane work at a construction site, etc., as mentioned above, the crane operator and the observer must always communicate closely with each other, but for other workers, the movement of the crane hook and jib It is often sufficient to be able to communicate with the crane operator and observer only when it is related to one's own work and safety, and it is not always necessary to always communicate with the duplex method, only the current operating status of the crane. It is enough if you can confirm it.

Therefore, in view of the above problems, in the present invention, while the crane operator and the observer are communicating via the double-credit pair channel, another worker uses the PTT (Push to Talk) method to create a single-credit channel. A voice communication system that can participate in communication as appropriate through communication is provided, and voice wireless communication is provided to ensure the safety of crane lifting work at construction sites, etc. without complicating the hardware of the wireless communication device. Was created with the aim of realizing a more practically compatible system.

The first invention of the present application is a first and second wireless communication devices that transmit and receive radio signals to and from each other in a duplex manner via a pair channel set in the duplex, and one or a plurality of first. A voice wireless communication system composed of the three wireless communication devices, wherein the first wireless communication device is set to simple credit together with a modulation / transmission means and a reception / demodulation means related to the pair channel. It also has channel reception / demodulation means, and the modulation / transmission means related to the pair channel transmits a radio signal modulated by the input audio signal to its own device, while the reception / demodulation means on the pair channel side and the simple credit. The receiving / demodulating means on the channel side of the above outputs audio by combining the demodulated signals, and the third wireless communication device together with the receiving / demodulating means and the modulation / transmitting means related to the simple credit channel. It also has two-channel reception / demodulation means related to the pair channel, executes carrier sense for the single credit channel based on the on operation of the PTT (Push to Talk) button, and determines that there is no reception input in the channel. In this case, the modulation / demodulation means related to the single credit channel transmits the radio signal modulated by the input audio signal to the own device by the PTT method, while the reception / demodulation means related to the single credit channel and the above. The present invention relates to a voice wireless communication system characterized in that voice output is performed by a signal obtained by synthesizing each demodulation signal obtained from a two-channel reception / demodulation means related to a pair channel.

According to the first invention, in a state where the first wireless communication device and the second wireless communication device are simultaneously communicating via a double-credit pair channel, the third wireless communication device is simultaneously used for both. While listening to a call, it is possible to participate in the simultaneous call by the PTT method on the condition that there is no reception input on the channel by carrier sense via the channel of the simplex method.
Participation in a simultaneous call when there are a plurality of third wireless communication devices is limited to one, but other third wireless communication devices that do not participate also participate in the first, second, and third wireless communications. Calls between devices can be heard.
The third wireless communication device participates in simultaneous calls using the carrier sense / PTT method, but simplex calls tend to be able to send messages that are more concise and focused than duplex calls, so information exchange is possible. Efficiency can be improved.

In the first invention, the second wireless communication device includes a reception / demodulation means and a modulation / transmission means in which the transmission / reception channels of the pair channel are opposite to those of the first wireless communication device. The reception / demodulation means of the channel set to the simple credit is also provided, and the voice is obtained by combining the demodulation signals obtained from the reception / demodulation means on the pair channel side and the reception / demodulation means on the channel side of the single credit. It is desirable to output.
In the first invention, when the second wireless communication device has only the receiving / demodulating means and the modulation / transmitting means related to the simultaneous call via the double-credit pair channel, the third wireless communication device However, according to this improved configuration, the voice from the third wireless communication device that participated in the call can be heard even in the second wireless communication device.

The second invention of the present application is a first and second wireless communication devices that transmit and receive radio signals to and from each other in a duplex manner via a pair channel set in the duplex, and one or a plurality of first. A voice wireless communication system composed of the three wireless communication devices, wherein the first wireless communication device is set to simple credit together with a modulation / transmission means and a reception / demodulation means related to the pair channel. It also has channel receiving / demodulating means, and outputs audio by combining the demodulated signals obtained from the paired channel side receiving / demodulating means and the simple credit channel side receiving / demodulating means, while outputting the audio. A radio signal modulated by a signal obtained by synthesizing an input audio signal to the own device and a demodulated signal obtained from the reception / demodulation means on the channel side of the single credit is transmitted by the modulation / transmission means according to the above third. The wireless communication device includes not only the receiving / demodulating means and the modulation / transmitting means related to the simple credit channel, but also the receiving / demodulating means for two channels related to the pair channel, and the simple credit is based on the ON operation of the PTT button. When carrier sense is executed by the receiving means related to the channel and it is determined that the channel has no receiving input, the radio modulated by the input audio signal to the own device by the modulation / transmitting means related to the simple credit channel. The present invention relates to a voice-wireless communication system characterized in that while transmitting a signal by the PTT method, voice output is performed by a signal obtained by synthesizing each demodulated signal obtained from the reception / demodulation means of the two channels related to the pair channel.

According to the second invention, unlike the first invention, in the first wireless communication device, the modulation / transmission means related to the pair channel receives / demodulates the input audio signal to the own device and the simple credit channel side. Since a radio signal modulated by a signal synthesized from the demodulated signal of the means is transmitted, the second wireless communication device receives and demodulates a simple credit channel as in the improved configuration of the first invention. Even if the means is not provided, the voice from the third wireless communication device can be heard.
Further, in the third wireless communication device of the present invention, since all the voice signals during the call are included in the signal obtained by synthesizing the demodulated signals of the two channels of the paired channels by the receiving / demodulating means, the credit is simple. It is not necessary to demodulate the received signal related to the channel of No. 1, and there is an advantage that only the receiving means for carrier sense is sufficient.

Then, the third wireless communication device in the first and second inventions includes the identification data of the own device in the header portion of the communication frame when transmitting the wireless signal, and the wireless received by the first wireless communication device. If the identification data is confirmed from the header portion of the communication frame obtained by demodulating the signal and the display unit of the own device is displayed for the identification of the third wireless communication device during communication, the identification display can be performed. It becomes easy to confirm the third wireless communication device during communication in the first wireless communication device.
In particular, when there are a large number of the third wireless communication devices, it is possible to know which wireless communication device among them participates in the communication, and further, wireless communication of a third party having no identification data. It is possible to effectively prevent the device from participating in the communication.

The first, second, and third wireless communication devices in the above first and second inventions can be configured as follows.
(1) The first wireless communication device in the voice wireless communication system of the first invention receives a radio signal of one of a voice output means, a voice input means, and the pair channel set in the double credit. The first receiving / demodulating means for demodulating, and the modulation / transmitting means for modulating and transmitting the carrier signal of the other channel of the pair channel with the voice signal input from the voice input means, and the simple credit. The voice is obtained by synthesizing the second receiving / demodulating means that receives and demodulates the radio signal of the set channel, and the demodulated signals of the first receiving / demodulating means and the second receiving / demodulating means. It can be configured as a wireless communication device including a signal synthesis means for outputting to the output means.

(2) The third wireless communication device in the voice-wireless communication system of the first invention receives the radio signals of the voice output means, the voice input means, and each channel of the pair channel set in the double credit, respectively. The first and second receiving / demodulating means for demodulating, and the third receiving / demodulating means for receiving and demodulating the radio signal of the channel set to the simple credit, and the simple credit are set. The carrier signal of the channel is modulated by the voice signal input from the voice input means and transmitted, and the carrier sense is executed based on the ON operation of the PTT button, and the reception input is sent to the channel. When it is determined that there is no demodulation signal, the PTT control means that controls the operation of the modulation / transmission means by the PTT method, the first and second reception / demodulation means, and the third reception / demodulation means. Can be configured as a wireless communication device including a signal synthesizing means for synthesizing and outputting to the audio output means.

(3) The second radio communication device in the voice radio communication system of the first invention relates to the pair channel with respect to the first reception / demodulation means and modulation / transmission means in the first radio communication device. The receiving / demodulating means and the modulation / transmitting means having opposite transmission / reception channels, the receiving / demodulating means for receiving and demodulating the radio signal of the channel set to the simple credit, and the reception on the pair channel side. -A signal synthesis means that synthesizes each demodulated signal obtained from the demodulation means and the reception / demodulation means on the channel side of the simple credit, an audio output means that outputs audio by the signal synthesized by the signal synthesis means, and the modulation / It can be configured as a wireless communication device including a voice input means for inputting a voice signal to the transmission means.

(4) The first radio communication device in the voice radio communication system of the second invention receives the radio signal of one of the voice output means, the voice input means, and the pair channel set in the double credit. The first receiving / demodulating means for demodulating, the second receiving / demodulating means for receiving and demodulating the radio signal of the channel set to the simple credit, the first receiving / demodulating means, and the above. A first signal synthesizing means that synthesizes each demodulated signal of the second receiving / demodulating means and outputs the demodulated signal to the voice output means, and a demodulation of the voice signal obtained from the voice input means and the second receiving / demodulating means. Radio communication including a second signal synthesizing means for synthesizing a signal and a modulation / transmitting means for modulating and transmitting a carrier signal of the other channel of the pair channel with a synthesized signal by the second signal synthesizing means. It can be configured as a device.

(5) The third wireless communication device in the voice-wireless communication system of the second invention receives the radio signals of the voice output means, the voice input means, and each channel of the pair channel set in the double credit, respectively. The first and second receiving / demodulating means for demodulating, the receiving means for receiving the radio signal of the channel set to the simple credit, and the carrier signal of the channel set to the simple credit are said to be the voice. When carrier sense is executed by the modulation / transmission means that modulates and transmits with the voice signal input from the input means and the reception means based on the ON operation of the PTT button, and it is determined that there is no reception input in the channel. In addition, a PTT control means that controls the operation of the modulation / transmission means by a PTT method and a signal synthesis means that synthesizes each demodulation signal of each of the first and second reception / demodulation means and outputs the demodulation signal to the audio output means. It can be configured as a wireless communication device equipped with.

According to the voice-wireless communication system and wireless communication device of the present invention, an operator of a power machine, a site observer, and another worker at a construction site or the like carry the wireless communication device and perform a three-way simultaneous call. In order to ensure work safety, the operator of the power machine and the site observer must always maintain close communication, while other workers need to be able to participate in the communication as needed, rather more. There is a practical requirement that it be desirable for workers to be able to participate, but instead of achieving this by adding more channels, the wireless communication device on the worker side is a single channel of the simplex system. It is realized by a voice-wireless communication system system in which the carrier sense PTT system is used to participate in the communication.

It is a network block diagram of the voice-wireless communication system which concerns on Embodiment 1 of this invention. It is a block diagram of the wireless communication device of a crane operator in the voice wireless communication system which concerns on Embodiment 1. FIG. It is a block diagram of the wireless communication device of the observer in the voice wireless communication system which concerns on Embodiment 1. FIG. FIG. 5 is a block diagram of a worker's wireless communication device in the voice-wireless communication system according to the first embodiment. It is a communication frame format diagram. It is a communication sequence diagram between each wireless communication device in the voice wireless communication system which concerns on Embodiment 1. FIG. It is a network block diagram of the voice-wireless communication system which concerns on Embodiment 2 of this invention. It is a block diagram of the wireless communication device of the observer in the voice wireless communication system which concerns on Embodiment 2. FIG. It is a communication sequence diagram between each wireless communication device in the voice wireless communication system which concerns on Embodiment 2. FIG. It is a network block diagram of the voice-wireless communication system which concerns on Embodiment 3 of this invention. FIG. 5 is a block diagram of a wireless communication device of a crane operator in the voice wireless communication system according to the third embodiment. FIG. 5 is a block diagram of a worker's wireless communication device in the voice-wireless communication system according to the third embodiment. It is a network block diagram of the voice wireless communication system which concerns on the prior art document. It is a network block diagram of the voice wireless communication system which concerns on a prior art document.

Hereinafter, embodiments of the voice-wireless communication system and wireless communication device of the present invention will be described in detail with reference to the drawings.
[Embodiment 1]
The network configuration diagram of the voice-wireless communication system according to this embodiment is shown in FIG. 1, where 10 is a wireless communication device carried by a crane operator, 30 is a wireless communication device carried by an observer, and 50a to 50n. Is a wireless communication device carried by each worker a to n, and as in the case of the wireless communication system of FIGS. 13 and 14 above, each wireless communication device is a voice communication in a specific low power radio station. It is a wireless facility for a wireless telephone for mobile phones, which can execute carrier sense and output a transmission with a transmission antenna power of 10 mW.

Here, the wireless communication device 10 of the crane operator has a configuration as shown in FIG.
The radio signal of channel CH1 in the 421 MHz band is extracted and amplified by the receiving unit 12 from the radio wave received by the antenna 11, and the audio signal is demodulated from the radio signal by the demodulation unit 13.
Further, the receiving unit 14 extracts and amplifies the radio signal of the channel ch2 in the 422MHz band, and the demodulating unit 15 demodulates the audio signal from the radio signal.
Then, the demodulated voice signals are synthesized by the voice signal synthesizer 16, then amplified by the amplifier 17, and the amplified voice signal drives the speaker (receiver) 16 to output voice.

On the other hand, the audio signal obtained from the microphone 19 is amplified by the amplifier 20, the carrier signal is modulated by the audio signal in the modulation unit 21, and the modulated carrier signal is wirelessly transmitted from the antenna 23 on the channel CH1 in the 440 MHz band from the transmitter 22. Send.
However, carrier sense (CS) is always executed during wireless transmission, and when the PTT button on the operation unit 24 is turned on, the control unit 26 checks whether the reception input of channel CH1 in the 421MHz band is above a certain level in the reception unit 12. If not, the transmission unit 22 shifts to the transmission mode and lights the corresponding indicator of the operation unit 24, and if there is, the transition to the transmission mode is stopped.

Then, the wireless communication device 10 sets the transmission / reception frequency, adjusts the volume, sets the display on the display unit 25, etc. by operating the buttons and knobs of the operation unit 24, and is based on those settings during operation. Each module is controlled by the control unit 26 based on the built-in program.

The channel CH1 in the 421 MHz band on the receiving side and the channel CH1 in the 440 MHz band on the transmitting side have a communication method of "broadcast communication method, duplex method or half" in Table 3.1 on page 4 of Non-Patent Document 1. It is a pair channel given in the "duplex system" with a frequency band of 421.8125 to 421.9125MHz (12.5kHz interval) /440.2625 to 440.3625MHz (12.5kHz interval). It is one of the paired channels defined as channel numbers 32 to 40 in Table 3.4 on page 6.
In addition, the channel ch2 of the 422 MHz band on the receiving side has a communication method of "unidirectional communication method, simplex communication method or broadcast communication method" and a frequency band of 422.2000 in Table 3.1 on page 4 of Non-Patent Document 1. It is a channel given as ~ 422.3000MHz (12.5kHz interval), and specifically, among the channels specified as channel numbers 41 to 49 in Table 3.5 on page 6 of the same non-patent document 1. It is one.
Regarding carrier sense, page 13 of the above non-patent document states, "When radio waves from other smokeless stations are received, the frequencies are the same as those emitted by the radio stations (duplex and semi-duplex). In that case, the transmission frequency corresponding to the reception frequency) shall not be emitted. ”Because the channel of the transmission unit 22 is the channel CH1 of the 440MHz band, the channel CH1 of the reception unit 12 of the 421MHz band Career sense is done in.

Next, the observer's wireless communication device 30 has a configuration as shown in FIG.
As is clear from the figure, the configuration is only general for a wireless communication device, and the frequency used for transmission / reception is transmitted / transmitted to the pair channel used in the wireless communication device 10 of the crane operator. The only feature is that the reception has the opposite relationship.
The radio signal of channel CH1 in the 440 MHz band is extracted and amplified by the receiver 32 from the radio wave received by the antenna 31, the audio signal is demodulated from the radio signal by the demodulator 33, and the audio signal is amplified by the amplifier 34. Drive the speaker 35 to output audio.
On the other hand, the voice signal obtained from the microphone 36 is amplified by the amplifier 37, the carrier signal is modulated by the voice signal in the modulation unit 38, and the modulated carrier signal is wirelessly transmitted from the antenna 40 by the channel CH1 in the 421 MHz band from the transmission unit 39. Send.

The wireless communication device 30 sets the transmission / reception frequency, adjusts the volume, sets the display on the display unit 42, etc. by operating the buttons and knobs on the operation unit 41, and is based on those settings during operation. Each module is controlled, and the control unit 43 executes them based on the built-in program, as in the case of the wireless communication device 10.
Similarly, carrier sense is always executed during wireless transmission. When the PTT button of the operation unit 41 is turned on, the control unit 43 receives the reception input of the 440 MHz band channel CH1 at the receiver 32 at a certain level or higher. If not, the transmission unit 39 shifts to the transmission mode and lights the corresponding indicator of the operation unit 41, and if there is, the transition to the transmission mode is stopped.

The wireless communication devices 50a to 50n of the workers a to n have a configuration as shown in FIG.
The reception unit 52 extracts and amplifies the radio signal of the channel CH1 in the 440 MHz band from the radio wave received by the antenna 51, and the demodulation unit 53 demodulates the audio signal from the radio signal.
Further, the receiving unit 54 extracts and amplifies the radio signal of the channel CH1 in the 421MHz band, and the demodulating unit 55 demodulates the audio signal from the radio signal.
Further, the receiving unit 56 extracts and amplifies the radio signal of the channel ch2 in the 422MHz band, and the demodulating unit 57 demodulates the audio signal from the radio signal.
Then, the demodulated audio signals for the three channels are synthesized by the audio signal synthesizer 58, amplified by the amplifier 59, and the amplified audio signal drives the speaker (receiver) 60 to output audio.
On the other hand, regarding the transmission system, the audio signal obtained from the microphone 61 is amplified by the amplifier 62, the carrier signal is modulated by the audio signal in the modulation unit 63, and the modulated carrier signal is transmitted from the transmission unit 64 to the simple credit 422MHz band. Radio transmission from antenna 65 on channel ch2 of.

In each of the wireless communication devices 50a to 50n, the transmission / reception frequency can be set, the volume can be adjusted, the display can be set on the display unit 67, etc. by operating the buttons and knobs on the operation unit 66, and those can be set during operation. Each module is controlled based on the setting, and the control unit 68 executes them based on the built-in program as in the case of the wireless communication devices 10 and 30.
Similarly, carrier sense is always executed during wireless transmission. When the PTT button of the operation unit 66 is turned on, the control unit 68 receives the reception input of the 422MHz band channel ch2 at the reception unit 56 at a certain level or higher. If not, the transmission unit 64 shifts to the transmission mode and lights the corresponding indicator of the operation unit 66, and if there is, the transition to the transmission mode is stopped.

Returning to FIG. 1, the voice wireless communication system according to this embodiment is located between the crane operator and the observer based on the configurations and functions of the respective wireless communication devices 10, 30, 50a to 50n as described above. Simultaneous communication between the crane operator and one of the workers (a, b, ..., N) can be realized.

FIG. 6 shows a communication sequence between wireless communication devices in the voice wireless communication system of this embodiment.
The crane operator selects and sets the transmission channel of the wireless communication device 10 that he / she carries to 440MHz band-CH1 and the reception channel to 421MHz band-CH1 and 422MHz band-ch2 in advance, and the observer and each worker a to n In response to this, the observer sets the transmission channel of his / her wireless communication device 30 to 421MHz band-CH1 and the receive channel to 440MHz band-CH1, and each worker a to n also sets his / her own radio. Set the transmission channel of the communication device 50a to 50n to 422MHz band-ch2 and the reception channel to 440MHz band-CH1, 421MHz band-CH1 and 422MHz band-ch2.

First, when the PTT button of the operation unit 24 is turned on, the crane operator's wireless communication device 10 performs carrier sense for the 421MHz band-CH1 by the reception unit 12 and the control unit 68, and receives signals of a predetermined level or higher. If it is not detected, a connection request signal is transmitted from the transmitting unit 22 to the 440MHz band-CH1, whereas when the monitor's wireless communication device 30 receives the connection request signal from the receiving unit 32, the transmitting unit 39 to 421MHz. The communication connection is completed when the connection response signal is transmitted in band-CH1 and the wireless communication device 10 of the crane operator receives the connection response signal.
After that, simultaneous communication using the pair channel (421MHz band-CH1 and 440MHz band-CH1) of the duplex frequency band becomes possible between the wireless communication device 10 of the crane operator and the wireless communication device 30 of the observer. , The crane operator and the observer will continue to be able to make closer conversations at all times.

On the other hand, the wireless communication devices 50a to 50n of the workers a to n are carriers for the 422MHz band-ch2, which is a single-credit channel in the receiving unit 56 and the control unit 68 when the PTT button of the operating unit 66 is turned on. If the sense is performed and a received signal of a predetermined level or higher is not detected, the voice signal of the operator is transmitted via the simple credit channel while maintaining the PTT button on state.
However, in FIG. 6, after the communication connection between the crane operator's wireless communication device 10 and the observer's wireless communication device 30 is completed and the simultaneous communication state is entered, the worker b-worker a-worker It shows a state in which an audio signal is transmitted to the crane operator's wireless communication device 10 in the order of n via the 422MHz band-ch2, which is a simple credit channel.

Therefore, in each wireless communication device 50a to 50n, the receivers 52, 54, 56 of the pair channel 421MHz band-CH1, 440MHz band-CH1 of the double credit and the channel 422MHz band-ch2 of the simplex system are used with the crane operator. While listening to the voices of all workers a to n including the observer and self, on the condition that the received signal above the predetermined level is not detected by the carrier sense of the single-credit channel 422MHz band-ch2 (naturally, others). Worker is not participating in the call), the voice of the worker can be transmitted to the wireless communication device 10 and the wireless communication devices 50a to 50n (including his own device) by the PTT method via the channel 422MHz band-ch2. ..
That is, each worker listens to the call between the crane worker, the observer, and the other worker, and makes a simultaneous call with the crane worker by the PTT method on the condition that the other worker does not participate in the call. This can be done, and in order to ensure the safety of crane work at construction sites and the like, it is possible to configure a voice-wireless communication system that actually suits the situation.

Note that FIG. 5 shows the communication frame formats of the transmission signals of the wireless communication devices 10, 30, 50a to 50n.
In this embodiment, the wireless communication device 10 includes the ID information of its own device in the header in the header of the communication frame in the transmission signals of the wireless communication devices 50a to 50n carried by the workers a to n. When a wireless signal from any of the wireless communication devices (50i: i = a to n) is received, the control unit 26 detects the ID information from the demographic signal of the demodulator 15 and associates it with the ID information in advance. By displaying the terminal number and the carrier name of the wireless communication device 50i on the display unit 25, the crane operator can easily confirm that the voice signal from the operator i is being received.
In addition, from the perspective of the crane operator, since it is possible to immediately recognize the voice message from which work location, it is possible to operate the crane in consideration of safety more quickly, and an unrelated third party can operate it. Participation in simultaneous calls can also be effectively prevented.

[Embodiment 2]
The network configuration diagram of the voice-wireless communication system according to this embodiment is shown in FIG.
This embodiment is characterized in that the configuration of the observer's wireless communication device 30A is different from those in the first embodiment, as is clear from comparing FIGS. 7 and 1.
Specifically, the receiver / demodulation function related to the single-credit channel 422MHz band-ch2 has been added to the monitor's wireless communication device 30A, and the reception / demodulation signal and the reception / demodulation of the double-credit channel 440MHz band-CH1 have been added. The point is that the signal is combined and the audio is output, and all other points are the same as in the case of the first embodiment.

The observer's wireless communication device 30A has a configuration as shown in FIG.
The radio signal of channel CH1 in the 440 MHz band is extracted and amplified by the receiver 32 from the radio wave received by the antenna 31, and the audio signal is demodulated from the radio signal by the demodulator 33.
Further, the receiving unit 45 extracts and amplifies the radio signal of the channel ch2 in the 422MHz band, and the demodulating unit 46 demodulates the audio signal from the radio signal.
Then, each demodulated voice signal is synthesized by the voice signal synthesizer 47, amplified by the amplifier 34, and the speaker (receiver) 35 is driven by the amplified voice signal to output voice.
Hereinafter, the relationship and function of the voice input / transmission system (36 to 40), the operation unit 41, the display unit 42, and the control unit 43 are the same as those of the monitor wireless communication device 30 in the first embodiment.

FIG. 9 shows a communication sequence between the wireless communication devices 10, 30A, 50a to 50n in the voice wireless communication system of this embodiment.
The communication sequence is almost the same as in the case of the first embodiment, and the wireless communication of the worker (worker b-worker a-worker n in the figure) capable of transmission in the monitor's wireless communication device 30A. The only difference is that the voice signals from the devices 50b, 50a, and 50n are also received by the observer's wireless communication device 30A (the part indicated by *).

According to this embodiment, in the voice-wireless communication system of the first embodiment, the voices of the workers a to n who participated in the communication could not be heard in the monitor's wireless communication device 30, whereas the crane operation was performed. The voices of those workers can be heard as well as the wireless communication device 10 of the workers.

[Embodiment 3]
The network configuration diagram of the voice-wireless communication system according to this embodiment is shown in FIG.
In this embodiment, as is clear from comparing FIGS. 10 and 1, the configurations of the wireless communication devices 10A of the crane operator and the wireless communication devices 50Aa to 50An of the workers a to n are those in the first embodiment. The feature is that it is different from the one.
First, in the wireless communication device 10 according to the first embodiment, the received audio signal related to the single-credit channel 422 MHz band-ch2 is combined with the received audio signal related to the double-credit channel 421 MHz band-CH1 and output as audio. However, in the wireless communication device 10A of this embodiment, in addition to the above configuration, the received audio signal related to the single-credit channel 422MHz band-ch2 is combined with the input audio signal from the microphone, and is double-credited. Channel 440MHz band-transmitted on CH1.

Further, in the wireless communication devices 50a to 50n in the first embodiment, all the received audio signals related to the 440 MHz band-CH1 and 421 MHz band-CH1 related to the double-credit pair channel and the received audio signals related to the single-credit channel 422 MHz band-ch2 are all. Although it is configured to be synthesized and output as audio, in the wireless communication device 10A of this embodiment, it is sufficient that the received signal related to the single-credit channel 422MHz band-ch2 is used for carrier sense, and the received signal is used. It is neither demodulated nor synthesized, it is simply targeted for detection of the received signal level.

The wireless communication device 10A of the crane operator in this embodiment has a configuration as shown in FIG.
As is clear from comparing FIGS. 11 and 2, the wireless communication device 10A of this embodiment has the same basic configuration as the wireless communication device 10 of the first embodiment.
That is, the radio signal of channel CH1 in the 421 MHz band is extracted and amplified by the receiving unit 12 from the radio wave received by the antenna 11, the audio signal is demodulated by the demodulating unit 13 from the amplified signal, and the receiving unit 14 is also used. Then, the radio signal of channel ch2 in the 422 MHz band is extracted and amplified, and the audio signal is demodulated by the demodulation unit 15 from the amplified signal.
Further, it is an embodiment that each demodulated voice signal is synthesized by the voice signal synthesizer 16 and then amplified by the amplifier 17, and the speaker (receiver) 18 is driven by the amplified voice signal to output voice. It is the same as the wireless communication device 10 of 1.

On the other hand, the audio signal obtained from the microphone 19 is amplified by the amplifier 20, and the audio signal synthesis unit 28 is provided in the next stage, and the audio signal from the amplifier 20 and the audio demodulated by the demodulation unit 15 are provided. The signal is synthesized by the voice signal synthesis unit 28, the carrier signal is modulated by the voice signal after synthesis in the modulation unit 21, and the modulated carrier signal is wirelessly transmitted from the transmission unit 22 to the channel CH1 in the 440 MHz band. It has become.
Therefore, in the wireless communication device 10A of this embodiment, the audio signal of the channel ch2 of the 422 MHz band received by the simplex system is combined with the audio signal of the microphone 19 and transmitted on the channel CH1 of the 440 MHz band of the duplex system. It is characterized by the fact that it is.

Further, the wireless communication devices 50Aa to 50An of the workers a to n in this embodiment have a configuration as shown in FIG.
As is clear from comparing FIGS. 12 and 4, the wireless communication devices 50Aa to 50An of this embodiment are common to the wireless communication devices 50a to 50n of the first embodiment in the basic configuration.
However, the demodulation unit 57 for the reception unit 56 related to the channel ch2 of the simple credit 422MH band provided in the wireless communication devices 50a to 50n of the first embodiment is not provided in this embodiment, and the demodulation unit 57 is not provided in this embodiment. There is a difference.

Therefore, the radio signal of channel CH1 in the 440 MHz band is extracted and amplified by the receiver 52 from the radio wave received by the antenna 51, and the audio signal is demodulated by the demodulator 53 from the amplified signal, and the receiver 54 Then, the radio signal of channel CH1 in the 421 MHz band is extracted and amplified, and the audio signal is demodulated by the demodulator 55 from the amplified signal, but each demodulated audio signal is synthesized by the audio signal synthesizer 58. After that, it is amplified by the amplifier 59, and the speaker (receiver) 60 is driven by the amplified audio signal to output audio.

By the way, the receiving unit 56 is dedicated to carrier sense, and when the PTT button of the operating unit 66 is turned on, the controlling unit 68 detects the received signal level of the 422MH band channel ch2 in the receiving unit 56, and that level. The possibility of wireless transmission from the transmission unit 64 is selected based on the above.
Therefore, it is not necessary to provide the demodulation unit 57 corresponding to the reception unit 56 as in the wireless communication devices 50a to 50n in the first embodiment.

On the other hand, regarding the transmission system, the audio signal obtained from the microphone 61 is amplified by the amplifier 62, the carrier signal is modulated by the audio signal in the modulation unit 63, and the modulated carrier signal is transmitted from the transmission unit 64 to the simple credit 422MHz band. Radio transmission is performed from the antenna 65 on channel ch2 of the above, which is the same as the transmission system of the first embodiment.

The monitor wireless communication device 30 in this embodiment has the same configuration as that in the first embodiment.

Returning to FIG. 10, ● indicates the voice signal of the crane operator, ■ indicates the voice signal of the observer, and ▲ indicates the voice signal of the operator who participated in the call (b in the figure).
In the voice-wireless communication system according to this embodiment, based on the configurations and functions of the wireless communication devices 10A, 30, 50Aa to 50An as described above, both of them perform simultaneous communication between the crane operator and the observer. The voice of the worker (b in the figure) who participated in the call can be heard as a synthetic sound together with the voice of the other party.
This is because in the first embodiment, the observer could not hear the worker's voice, and in the second embodiment, the observer can hear the worker's voice, but the observer's wireless communication device 30A has. It can be said that the third embodiment is more rational in comparison with the fact that the receiving unit 45, the demodulating unit 46, and the voice synthesis unit 47 are required as shown in FIG.

Further, in the wireless communication devices 50Aa to 50An of the workers a to n, the voice of the worker (b in FIG. 10) participating in the call is heard together with the voice of the simultaneous call between the crane operator and the observer. It can be heard as a synthetic sound.
In this case, the receiving unit 56 related to the single-credit 422MHz band channel ch2 in the wireless communication devices 50Aa to 50An is dedicated to carrier sense, and the demodulating unit for the received signal is as in the case of the first and second embodiments. It is not provided, and it can be said that it is rational in that respect as well.

The voice wireless communication system and wireless communication device of the present invention are used as a communication system for ensuring safety by carrying a wireless communication device between a crane operator, an observer and an operator in crane work at a construction site. it can.

10 ... Crane operator's wireless communication device, 11 ... Antenna, 12 ... Receiver, 13 ... Demodulator, 14 ... Receiver, 15 ... Demodulator, 16 ... Audio signal synthesizer, 17 ... Amplifier, 18 ... Speaker (receiver) ), 19 ... Microphone, 20 ... Amplifier, 21 ... Modulator, 22 ... Transmitter, 23 ... Antenna, 24 ... Operation unit, 25 ... Display unit, 26 ... Control unit, 30 ... Observer's wireless communication device, 31 ... Antenna, 32 ... receiver, 33 ... demodulator, 34 ... amplifier, 35 ... speaker (receiver), 36 ... microphone, 37 ... amplifier, 38 ... modulator, 39 ... transmitter, 40 ... antenna, 41 ... operation unit, 42 ... Display unit, 43 ... Control unit, 50a, 50b, ~, 50n ... Worker's wireless communication device, 51 ... Antenna, 52 ... Receiver unit, 53 ... Demodulation unit, 54 ... Receiver unit, 55 ... Demodulation unit, 56 … Receiver, 57… demodulator, 58… audio signal synthesizer, 59… amplifier, 60… speaker (receiver), 61… microphone, 62… amplifier, 63… modulator, 64… transmitter, 65… antenna, 30A ... Monitorer's wireless communication device, 45 ... Receiver, 46 ... Demodulator, 47 ... Voice signal synthesizer, 10A ... Crane operator's wireless communication device, 28 ... Voice signal synthesizer, 50Aa, 50Ab, ~, 50An ... Worker's wireless communication device, 210 ... master unit, 211 ... signal synthesis means, 220-1 to 3 ... slave unit, 230 ... first slave unit, 231 ... voice synthesis means, 232 ... voice synthesis means, 233 ... speaker , 234 ... Microphone, 240 ... Second handset, 241 ... Third handset.

Claims (9)

Consists of a first and second wireless communication device that transmits and receives wireless signals to and from each other via a pair channel set to duplex, and one or a plurality of third wireless communication devices. It is a voice-wireless communication system
The first wireless communication device includes not only the modulation / transmission means and the reception / demodulation means related to the pair channel, but also the reception / demodulation means of the channel set to simple credit, and the modulation / transmission means related to the pair channel. While transmitting a radio signal modulated by the input audio signal to the own device, the combined signal of the signals demodulated by the pair channel side receiving / demodulating means and the single credit channel side receiving / demodulating means is used. Output audio,
The third wireless communication device includes not only the receiving / demodulating means and the modulation / transmitting means related to the simple credit channel, but also the receiving / demodulating means for two channels related to the pair channel, and the PTT (Push to Talk) button. When carrier sense is executed for the simple credit channel based on the on operation and it is determined that the channel has no receive input, the input voice to the own device is input by the modulation / transmission means related to the simple credit channel. While transmitting a radio signal modulated by a signal by the PTT method, voice is produced by a signal obtained by synthesizing each demodulated signal obtained from the receiving / demodulating means related to the single credit channel and the receiving / demodulating means of two channels related to the pair channel. A voice-wireless communication system characterized by outputting. The second wireless communication device is set to the simple credit together with the reception / demodulation means and the modulation / transmission means whose transmission / reception channels are opposite to those of the first wireless communication device for the pair channel. A claim that also includes channel receiving / demodulating means, and outputs audio by a signal obtained by synthesizing each demodulated signal obtained from the paired channel side receiving / demodulating means and the simple credit channel side receiving / demodulating means. The audio-wireless communication system according to 1. Consists of a first and second wireless communication device that transmits and receives wireless signals to and from each other via a pair channel set to duplex, and one or a plurality of third wireless communication devices. It is a voice-wireless communication system
The first wireless communication device includes not only the modulation / transmission means and the reception / demodulation means related to the pair channel, but also the reception / demodulation means of the channel set to simple credit, and the reception / demodulation means on the pair channel side. And the voice output is performed by the combined signal of each demodulated signal obtained from the receiving / demodulating means on the channel side of the simple credit, while the input voice signal to the own device and the simple A radio signal modulated by a signal synthesized from a demodulated signal obtained from the receiving / demodulating means on the credit channel side is transmitted.
The third wireless communication device includes receiving / demodulating means and modulation / transmitting means related to the simple credit channel, and also includes receiving / demodulating means for two channels related to the paired channel, based on an on operation of the PTT button. When carrier sense is executed by the receiving means related to the simple credit channel and it is determined that there is no reception input in the channel, the input audio signal to the own device is input by the modulation / transmitting means related to the simple credit channel. A voice wireless communication system characterized in that while transmitting a radio signal modulated in the above by the PTT method, voice output is performed by a signal obtained by synthesizing each demodulated signal obtained from the reception / demodulation means of two channels related to the pair channel. The communication frame obtained by the first wireless communication device demodulating the received wireless signal by including the identification data of the own device in the header portion of the communication frame when the third wireless communication device transmits the wireless signal. The voice of claim 1, claim 2 or claim 3 in which the identification data is confirmed from the header portion of the above and the identification display relating to the third wireless communication device being communicated is displayed on the display unit of the own device. Wireless communication system. The first wireless communication device in the voice-wireless communication system according to claim 1 or 2.
Audio output means and
Voice input means and
The first receiving / demodulating means for receiving and demodulating the radio signal of one of the paired channels set to the double credit, and
A modulation / transmission means that modulates a carrier signal of the other channel of the pair channel with an audio signal input from the audio input means and transmits the signal.
A second receiving / demodulating means that receives and demodulates the radio signal of the channel set to the simple credit, and
A wireless communication device comprising: a first receiving / demodulating means and a signal combining means for synthesizing each demodulated signal of the second receiving / demodulating means and outputting the demodulated signal to the voice output means. A third wireless communication device in the voice-wireless communication system according to claim 1 or 2.
Audio output means and
Voice input means and
The first and second receiving / demodulating means for receiving and demodulating the radio signals of each channel of the pair channel set in the double credit, respectively.
A third receiving / demodulating means that receives and demodulates the radio signal of the channel set to the simple credit, and
A modulation / transmission means for modulating and transmitting a carrier signal of a channel set to the simple credit with a voice signal input from the voice input means, and a modulation / transmission means.
A PTT control means that executes carrier sense based on the ON operation of the PTT button and controls the operation of the modulation / transmission means by the PTT method when it is determined that there is no reception input in the channel.
A wireless communication characterized by comprising a first and second receiving / demodulating means and a signal synthesizing means for synthesizing each demodulated signal of the third receiving / demodulating means and outputting the demodulated signal to the voice output means. apparatus. A second wireless communication device in the voice-wireless communication system according to claim 2.
A reception / demodulation means and a modulation / transmission means in which the transmission / reception channels related to the pair channel have an opposite relationship to the first reception / demodulation means and modulation / transmission means in the first wireless communication device.
A receiving / demodulating means that receives and demodulates the radio signal of the channel set to the simple credit, and
A signal synthesizing means for synthesizing each demodulated signal obtained from the receiving / demodulating means on the pair channel side and the receiving / demodulating means on the simple credit channel side.
A voice output means that outputs voice by a signal synthesized by the signal synthesis means, and
A wireless communication device including a voice input means for inputting a voice signal to the modulation / transmission means. The first wireless communication device in the voice-wireless communication system according to claim 3.
Audio output means and
Voice input means and
The first receiving / demodulating means for receiving and demodulating the radio signal of one of the paired channels set to the double credit, and
A second receiving / demodulating means that receives and demodulates the radio signal of the channel set to the simple credit, and
A first signal synthesizing means that synthesizes the demodulated signals of the first receiving / demodulating means and the second receiving / demodulating means and outputs the demodulated signals to the audio output means.
A second signal synthesizing means for synthesizing the voice signal obtained from the voice input means and the demodulated signal of the second receiving / demodulating means, and
A wireless communication device comprising: a modulation / transmission means for modulating and transmitting a carrier signal of the other channel of the pair channel with a composite signal by the second signal synthesis means. A third wireless communication device in the voice-wireless communication system according to claim 3.
Audio output means and
Voice input means and
The first and second receiving / demodulating means for receiving and demodulating the radio signals of each channel of the pair channel set in the double credit, respectively.
A receiving means for receiving the radio signal of the channel set to the simple credit, and
A modulation / transmission means for modulating and transmitting a carrier signal of a channel set to the simple credit with a voice signal input from the voice input means, and a modulation / transmission means.
A PTT control means that executes carrier sense by the receiving means based on an on operation of the PTT button and controls the operation of the modulation / transmitting means by the PTT method when it is determined that there is no reception input in the channel.
A wireless communication device comprising: a signal synthesizing means for synthesizing each demodulated signal of each of the first and second receiving / demodulating means and outputting the demodulated signal to the voice output means.

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