KR20090011374A - A remote-control/telemetering device for radio communication equipment by 2wire line and, the appropriate using method - Google Patents

Abstract

A two-wire remote control/monitor apparatus and a method for using the same are provided to enable an operation center to perfectly control and monitor a transceiver positioned in a remote site by using a single 2-wire dedicated line. A receiving amplifier(2a) amplifies a voice signal received from an RF transceiver, and then transmits the amplified signal to transmission lines(L1,L2). A PTT tone attenuator(12a) selectively attenuates only signals corresponding to a PTT tone band among output signals of the receiving amplifier between the receiving amplifier and transmission lines. A switching circuit(14a) separates PTT tone attenuators(,4a), a PTT tone detector(7a), a control data detector(9a), the input/output stages of an alarm and monitor data processor(11a) into a voice control system and a monitoring system.

Description

A remote-control / telemetering device for radio communication equipment by 2wire line and, the appropriate using method}

1 is a block diagram illustrating the prior art.

2 is a block diagram illustrating an embodiment of the present invention.

3 and 4 are hierarchical and flow charts illustrating the operation of FIG.

FIG. 5 is a hierarchical diagram of the method of use of the present invention linked to FIG.

The present invention is a technique for achieving stable transmission / reception between a voice signal and a control / monitoring signal transmitted in two directions in a two-wire remote control and a remote monitoring device for wireless communication.

The communication of the coast station that performs voice communication has been installed in a structure that separates the transmitting station that emits the radio wave and the operation center that receives and operates the radio waves. (In some cases, the receiving station and operation center may be separate. In the present invention, this is referred to as an operation center collectively), which is intended to prevent interference between channels when receiving a plurality of adjacent channels.

On the other hand, the unmanned relay station, which is a secondary communication means of the coast station, has a structure in which it transmits and receives in one place and only the operation center is isolated from each other. For example, the representative example is a duplex communication method, but SSB (Single Side Band) communication in the 27 MHz band has relatively little cross-channel interference, and thus, most of them serve as transmission and reception at the same place.

Recently, large ships are considering remote control / monitoring of onboard radio facilities or remote control / monitoring of voice command facilities, so a new study on this is very useful industrially.

Effectively transmits control / monitoring signals between the operation center (the term for the place where the operator resides) and the site (the term generally encompasses the transmitter or unmanned relay station of the coast station where the operator does not reside). Attempts to unmanned have been around for some time and several techniques are known.

As such a technique, a conventional method of using a two-wire + four-wire system as a line for each device, and using two-wire for voice communication and four-wire for control monitoring signal transmission (Korean Patent Publication No. 10-2002-0007487, Patent Document No. 10-2003-0045380 (hereinafter referred to as Prior Art 1 and 2), and in recent years have attempted to improve this method of connecting a VoIP (Internet) and a dedicated line in parallel (Korea Patent Publication No. 10-2004-0035614 (Hereinafter referred to as prior art 3) and a method of serially connecting the Internet and a dedicated line (Korean Patent Publication No. 10-2006-0036073; hereinafter referred to as prior art 4) are registered as patents, respectively.

Among them, the prior art 4 is most preferable in terms of performing the functions of voice transmission, control and monitoring in a two-wire system between the operation center and the site, and furthermore, if necessary, can be commonly used in a third operation center. In particular, the high signal level of the monitoring data has a high probability of malfunctioning the transmission / reception control unit of sensitive sensitivity, and thus it is difficult to be practically used as a stable structure unless further invention is made.

On the other hand, the prior arts 1 and 2 have a disadvantage of increased cost and complicated manufacturing and construction due to a plurality of lines, and the prior art 3 has an unnatural defect due to the delay characteristics occurring in the Internet transmission path as a particular problem. In order to improve the efficiency, when combined with a dedicated line, that is, a voice signal is a dedicated line and control / monitoring data is an internet, there is a drawback of double line cost.

Accordingly, the present invention solves the above problems by devising new combinations and simplifications according to the technology evolution principle to achieve more excellent effects, and in particular, an unmanned relay station or a transmission (reception) where transmission and reception are performed by a single wireless transceiver. The present invention provides a configuration in which distinction between voice transmission / reception, control and monitoring signals can be made within the communication site so that the above-mentioned prior art 4 can contribute to the practical use in a stable transmission environment.

The first object of the present invention is to provide a function or means capable of performing a remote control and remote monitoring, as well as remote control and remote monitoring of a transceiver located at a remote site using a 2-wire single dedicated line.

It is a second object of the present invention to provide a function or a means for effectively distinguishing two-way audio signals and two-way control / monitoring signals that are transmitted in a complex form on a two-wire single line, and stabilizing without mutual interference.

The third object of the present invention is to reduce the cost of remote operation by using a single transmission line, and to facilitate construction and maintenance by a simple structure.

The fourth object of the present invention is to be further evolved structure to be linked to the prior art 4 and to be interoperable even in the third operation center using the Internet.

The fifth object of the present invention is to provide a method of use thereof to efficiently utilize the configuration of the present invention.

The present invention for this purpose essentially solves the 'cause of the received signal from the radio transmitter malfunctioning the radio transceiver,' which is a problem in the operation of the two-wire line in the prior art 4, and furthermore the voice signal when the control and monitoring signals are generated. The present invention provides a path control component that automatically separates paths and enables stable monitoring, and a method of efficiently using the apparatus including the same.

1 is a diagram showing the configuration of a remote control system according to the prior art for better understanding.

In FIG. 1, the transmission / reception site TRX Site 1 is composed of the following components.

That is, the conventional radio transceiver 1a including the antenna 1a-1;

After amplifying the received signal from the radio transceiver 1a and transmitting the received signal to the transmission line (L1, L2) and amplified voice signals received from the transmission line (L1, L2), the radio transmitter (1a) A transmission amplifier 3a connected for supplying to the input terminal of

PTT tone attenuator 4a and a transmission line connected to selectively block a transmission key control signal (hereinafter referred to as a PTT (Press To Talk) tone) mixed with voice signals transmitted from transmission lines L1 and L2. A PTT tone detector 7a connected to selectively detect a transmission key control signal (PTT tone) mixed with the voice signals transmitted from L1 and L2;

A PTT controller 6a connected to receive a signal from the PTT tone detector 7a and convert the radio transceiver 1a into a transmission;

A line matcher 5a connected to each other to achieve impedance matching between the transmission lines L1 and L2;

An interface 8a connected to control the function of the radio transceiver 1a, a standardized RS-232 that processes serial signals, or any non-standard parallel signal port that processes parallel signals, the frequency / channel / sensitivity / clarity of the radio transceiver. Control one or more of / power on-off, and the microprocessor will do this, as follows);

A control data detector 9a connected to receive the control signal transmitted from the transmission lines L1 and L2 for controlling the function of the radio transceiver 1a, and to analyze and transmit the required control data to the interface 8a;

An operating state detector 10a (e.g., detecting a power supply voltage / power current / transmission progression wave output / transmission reflection wave output / etc.) Connected to detect an operation state of the radio transceiver by means such as the interface 8a;

The operation state detector 10a stores the detected result and analyzes the detected result to form an integrated configuration as the alarm and monitoring data processor 11a which is connected to generate an alarm signal when the set reference value is exceeded.

In addition, in FIG. 1, the operation center is composed of the following components.

That is, push button type transmission key 1b (PTT switch) operated whenever the user wants to transmit;

A PTT tone generator 2b connected to cause the operation state to be generated as a PTT tone when the transmission key is operated;

A microphone 3b for converting an operator's voice into an electrical signal and a transmission voice amplifier 4b linked thereto;

A mixer (5b) connected to mix the PTT tone from the PTT tone generator (2b) and the voice signal from the transmit voice amplifier (4b) and transmit it to the site side;

A line matcher 6b connected to perform impedance matching between the transmission lines L1 and L2 and the respective components;

A speaker 7b for converting an electric signal into a voice signal;

A reception voice amplifier 8b which amplifies the voice signal transmitted from the transmission line L1, L2 side and transmits the amplified voice signal to the speaker 7a;

A display and manipulator 9b connected to the operator's operation panel so as to be integrated with or separated from the operator to accept the operator's operation or display the operation information;

A control data generator (10b) connected as the display and operator (9b) to generate control data corresponding to the request data manipulated by the user;

A control signal converter (11b) for converting the control data generated by the control data generator (10b) into an analog signal suitable for the transmission lines (L1, L2);

An alarm detector 12b for selectively detecting an alarm signal transmitted from the transmission lines L1 and L2 and connecting the indicator 9b to drive;

It consists of a monitoring data detector 13b which connects the input / output terminals to analyze and extract the various monitoring data transmitted from the transmission lines L1 and L2 by function and monitoring value and display it on the display 9b.

An unexplained reference code (BK) connected to the reception voice amplifier 8b is a break-in circuit that prevents the transmission of the feedback voice to the reception path when the transmission key is operated.

Pointing out the shortcomings in the prior art while explaining the combined operation of each component is as follows.

The radio transceiver 1a installed at the site (TRX Site 1) captures radio waves in the designated channel and outputs a voice signal when the PTT control signal is not normally supplied. If the voice signal is output, the voice signal is received. (2a) → line matching unit (5a) → line matching unit (6b) → receiving voice amplifier (8b) → speaker (7b) in order to be delivered to the center. The signal can be received remotely.

If the operator wants to perform the transmission by operating the radio transmitter in the remote site, the transmission is performed as follows.

First, when the operator operates the transmission key 1b at the moment to transmit, the operation operates the PTT tone generator 2b to generate a PTT tone which is a continuous sinusoidal wave of, for example, 2600 Hz, and then the PTT tone is line matched. The radio transmitter 1a is switched to transmission in the order of the order 6b? Line matcher 5a? PTT tone detector 7a? PTT controller 6a? PTT input control of the radio transmitter.

Immediately thereafter, when the operator supplies a voice signal to the microphone 3b, the signal is amplified by the transmit voice amplifier 4b and then mixed in the mixer 5b. Thus, the PTT tone is a guard tone mixed with the voice signal. If, for example, the PTT tone is set to a guard tone of 2600 Hz, the output of the mixer will mix the voice signal in the normal voice band from 300 Hz to 3400 Hz and the PTT tone of 2600 Hz, (6b) → Only the PTT tone is selectively detected in the process of passing through the line matcher 5a → PTT tone detector 7a, while the line matcher 6b → line matcher 5a → PTT tone attenuator ( Since only the PTT tone is selectively attenuated in the process of passing through 4a), the voice signal separated from the PTT tone is supplied only to the transmission input terminal of the radio transmitter via the transmission amplifier 3a.

That is, the PTT tone transmitted from the operation center controls only the transmission / reception operation of the radio transmitter, but is not supplied as an input signal of the radio transmitter due to the PTT tone attenuator 4a. The maximum attenuation rate is set to about -50dB within the band range.

However, the problem in the prior art is that if the PTT tone frequency signal component is included in the output of the voice signal (or the monitoring data signal of the wireless transmitter) received from the wireless transceiver or the data signal monitored and transmitted by the wireless transceiver, the voice signal itself. Is fed back to the radio transceiver 1a → receiver amplifier 2a → PTT tone detector 7a → PTT controller 6a → radio transceiver 1a, causing the radio transmitter to malfunction. Even if the component is not included, this feedback phenomenon occurs even if the PTT tone component is indirectly included due to the noise during normal radio channel or demodulation, because the PTT tone detector 7a is transmitted from the transmission lines L1 and L2. Is supplied to the PTT tone detector 7a from the receiving amplifier 2a while the level of the voice signal supplied to Castle signal level is due to ease of reaction a small harmonic component is very high enough to 0dBm.

Here, the feedback phenomenon is that when the adjacent audio signal output is excessive, the signal is fed back to the PTT control signal so that the PTT is turned on, and when the PTT is turned on, the reception operation is blocked and the audio signal output is lost. Repeatedly, this is a phenomenon in which the wireless transceiver causes feedback vibration to 'transmit ↔ receive' according to the received signal.

Therefore, due to this problem, the prior arts 1, 2, 3, and 4 are very difficult to achieve perfection by applying to a 2-wire remote control system of a site where transmission and reception are performed together, and even if practical, sound quality due to the transmission / reception vibration Poor or have to suffer the inconvenience of operating stability by appropriately adjusting the received signal level from time to time, which is a problem that can be immediately understood in principle.

In particular, the prior art 4 is to transmit the PTT tone as a trigger signal using a latch method, so if the PTT is activated by a voice signal, the PTT tone is not simply shaken by transmission / reception but is fixed by continuous transmission. In spite of the fatal flaw, it has more unstable in transmitting / receiving in spite of the remaining unique technical advantages, and even when the alarm and monitoring data processor 11a generates an output even in the prior art 3 using a general guard tone. If a malfunction occurs, of course, the previous monitoring data cannot be read, which is different from the monitoring value when an alarm occurs.

In the case of control and monitoring data, the remote control data command or alarm signal for controlling the operation of the radio transmitter in the operation center is only a few kinds of data, and is a stable sinusoidal signal without harmonics, for example, a dual frequency modulated signal (DTMF). Supplied as Dual Tone Multi Frequency, while monitoring data forms a complex digital modulated signal that, in principle, involves a myriad of cases (at least 27,000 if counting just a frequency using 27 MHz). Harmonics and the like in the process of transmitting such a complex signal may cause the PTT tone detector 7a to malfunction as described above.

The present invention has been made to solve such a problem, and the second, third, and fourth degrees describe an exemplary embodiment thereof in an apparatus diagram and a method diagram.

First, FIG. 2 is a block diagram showing the device configuration of the present invention, which includes the following additional components in the configuration of FIG.

In FIG. 2, the transmission / reception site (TRX Site 1) is a path for amplifying and transmitting the voice reception signal from the radio transceiver to the transmission lines L1 and L2, and the transmission lines L1 and L2. Between, through the PTT tone attenuator 12a for selectively attenuating only the signal corresponding to the PTT tone band of the output of the reception amplifier 2a,

The input / output terminals of the voice transmission / reception system 12a and 4a, the PTT tone detector 7a and the control data detector 9a and the alarm and monitoring data processor 11a are connected to the audio and control system, respectively. After the separation to ', through the switching circuit (14a) to selectively connect the' voice and control system 'or' watch watch 'to the transmission line in accordance with the switching of the contacts (A, B) of the switching circuit (14a), The input and output terminals of the supervisory signal converter 15a and the switching controller 13a are connected between the alarm and monitoring data processor 11a and the switching circuit 14a as means for controlling the central contact point C of the switching circuit 14a. By interlocking, the central contact point (C) is switched to the watchdog contact point (A) only when the monitoring data signal is transmitted, and is normally maintained as the voice and control system contact point (B).

In addition, in FIG. 2, the center operates the 'voice and control system' and the input and output terminals of the 'voice transmission and reception systems 5b and 8b' and the alarm detector 12b and the 'monitoring data detector 13b', respectively. After the separation into the 'monitoring system' through the switching circuit (15b) to selectively connect the 'voice and control system' or 'watch watch' to the transmission line in accordance with the switching of the contacts (A, B) of the switching circuit (15b) Meanwhile, as a means for controlling the center contact point C of the switching circuit 15b, the input / output terminals of the control signal converter 11b and the switching controller 14b between the control data generator 10b and the switching circuit 15b. The central contact point (C) is switched to the watchdog contact point (A) only when the monitoring data transmission command and the monitoring data signal are transmitted, and the voice contact point is normally maintained as the voice and control system contact point (B).

The present invention configured as described above acts as follows in response to an operator's operation or received signal.

In the operation of the site-side configuration of FIG. 1, the output of the reception amplifier 2a of the path for receiving the radio wave captured by the radio transceiver 1a and outputting the audio is, for example, when the reception bandwidth of the radio receiver is 300 to 2800 Hz. The received audio output signal is accompanied by a 2600 Hz signal which is a PTT tone frequency component, but it is understood that 2600 Hz which is a PTT tone frequency component among the signals is suppressed while passing through the PTT tone attenuator 12a. Is the same as

Therefore, since the PTT tone contained in the received signal is erased, the feedback loop from the reception amplifier 2a to the PTT tone detector 7a to the PTT controller 6a to the radio transceiver 1a to the reception amplifier 2a is cut off and is wireless. The obstacle that the transmission and reception alternate between transmission and reception is prevented.

If an alarm signal is generated because the alarm and monitoring data processing 11a analyzes the data from the operation state detector 10a regarding the operation of the wireless transceiver of the site and determines that it has exceeded the setting range, the signal is a monitoring signal converter. The output of one side of the monitoring signal converter 15a drives the switching controller 13a to be fed to the monitoring system contact point A of the switching circuit 14a via 15a. Since the contact point C is switched to the monitoring system contact point A, the signal is transmitted to the transmission lines L1 and L2 through the line matching device 5a.

On the other hand, since the central contact (C) is moved to the monitoring system contact (A) and at the same time the voice and control system contact (B) that was normally maintained in contact with the central contact (C), so the output of the monitoring signal converter 15a Will not be passed to the voice / control system.

The operation of the switching circuit 14a is also the same when the monitoring data is transmitted in response to a command from the operation center described later.

The alarm and monitoring data processor 11a temporarily stores various data from the operation state detector 10a that checks the operation of the wireless transmitter and receiver, and compares the monitoring data with a preset reference value so that the monitoring data is out of the setting range. Alarm signal is automatically generated when it wakes up.

Here, the switching controller 13a is a circuit for switching the contact of the switching circuit at the same time as the generation of the monitoring signal and maintaining the state stably until the monitoring data is finished. Specifically, the fast response characteristic and the delay return characteristic It can be configured as a time constant circuit of, and the start is performed as 'DOC (Data Operation Control) which detects the presence or absence of a data signal and automatically switches the switching circuit when there is a data signal or at a starting pulse.'

In addition, the switching circuit 14a may be composed of a relay, a photocoupler driven FET switch, a bidirectional switch, a switch using a transistor, as well as various semiconductor elements such as CDS couplers and the like. The device may be regarded as a component having a higher attenuation than at least a typical hybrid attenuation characteristic.

The supervisory signal converter 15a transmits various data values to asynchronous communication known in the art. However, since the path of the voice and control system is interrupted during the supervisory signal transmission, the supervisory signal converter 15a is wireless even if the supervisory data is transmitted at a sufficient level so that there is no error. The operation of the transmitter is extremely stable, and there is no influence of the reception noise from the radio transceiver, so that the data transmission speed can be further improved.

In the center side operation of FIG. 1, the center side switching circuit 15b normally maintains the center contact point C in contact with the voice and control system contact point B. This is similar to the principle of the site side switching circuit 14a. same.

In this case, when an alarm signal is received from the site, the signal is detected by the alarm detector 12b, and among the equivalent means that an alarm sound, LED, LCD, computer screen, and other operators can easily recognize the display and the operator 9b. It is represented by any one or more.

This alarm signal is a relatively instantaneous simple single tone or dual frequency modulated signal (DTMF), therefore it does not appear as an unpleasant noise in the voice signal system, regardless of the site or operation center. By blocking the contacts, they are completely separated from the voice and control system and do not malfunction the radio transceiver).

On the other hand, when the operator who confirms the alarm signal specifically commands to transmit detailed monitoring data to check in which function in the site an abnormality occurs, the signal is transmitted to the control signal converter 11b for asynchronous communication or other packet communication. It is supplied to the monitoring system contact point A of the switching circuit 15b as a signal to be performed, and is supplied to the switching controller 14b to monitor the central contact point C of the switching circuit at the voice and control system contact point B. Make contact with the grid contact (A).

Accordingly, the site-side control data detector 9a instructs the alarm and monitoring data processor 11a to detect the detailed monitoring data storage result or the monitoring value from the operation state detector 10a again and transmit it to the operation center. At the same time as the supervisory signal converter 15a, which is the transmission path, generates an output, the site is separated from the audio / control system as described above, and only the supervisory data, which is the supervisory system, is transmitted to the transmission line side.

At this time, the switching circuit 15b on the operation center side also controls the signal converter 11b as soon as the operator commands the contact point of the switching circuit 15b, as in the principle of the site, from 'C↔B' to 'C↔A'. As soon as the user commands to confirm the monitoring data, the monitoring data transmission command and the transmission of the monitoring data storage value are separated from the voice signal and the control data, the voice and control system, and are connected only to the monitoring data path.

Therefore, the monitoring data is completely eliminated the concern that the transmission / reception is stable and excessive noise in the voice signal path, which is the voice and control system, or the PTT of the wireless transmitter is malfunctioned.

3 to 5 are hierarchical structure diagrams and flowcharts of the present invention, i.e., the structure of the present invention is a transmission environment, situation development, path control and situation execution as shown in FIG. The use method of the present invention consists of three steps as shown in FIG.

Hereinafter, the present invention will be described in detail with reference to FIGS. 4 and 5 in terms of signal flow system and method of use.

① The remote control and remote monitoring device interworking with the radio transmitter maintains the reception operation immediately after the normal preparation phase and if the operator controls the PTT for transmission, it is switched to the transmission operation (2c, 4c).

The situation in which each component is operated in response to the reception operation and the transmission operation is described in detail in the reception paths (B and C of 1a, 2a, 12a and 14a, C and B, 8b and 7b of 15b) and ( As described above, transmission paths consisting of B and C of 1b → 2b → 5b, 3b → 4b → 5b, 15b, C and B of 6b, 5a, 14a, 7a, 6a, 1a, 4a, 3a, 1a) In the new operation, only the reception operation in the voice / control system is suspended. Thus, the first operation of the present invention in the two-wire single general transmission line included in the use method is to alternately operate by transmission / reception according to the PTT control. It is in operation.

② If the operator performs a control operation, the control data generated from the operator switches the path from the operation center switching circuit to 'voice / control system → watchdog' and accordingly the control data is transferred to the site and then converted. While the path is returned, the site executes control in accordance with the control command (5c, 6c, 7c, 8c, 9c, 10c).

The control command in this process operates the radio transceiver 1a as a path of (9b, 10b, 11b, 14b, 15b A and C, 6b, 5a, 14a C and B, 9a → 8a → 1a). This includes a control command for manipulating any one or more of the channel / frequency / clarity / sensitivity as described above.

In this process, however, the above-mentioned (14b, 15b A and C) switching is excluded as an equivalent means, and the direct transmission via 11b to (15b B and C), i.e., does not switch the switching circuit on the operation center side. Can be sent directly to the site, in which case it is not necessary to receive a response back to the control command. (On the other hand, when sending a response to the control command, the site can be directly transmitted from the control data converter 9a. Not only can the single signal be transmitted, but also can be sent as a path of (9a → 11a → 15a ....) as described later, if necessary, and the site-side switching circuit will also be controlled as described later.

In particular, when transmitting such control commands, the voice / control system is maintained as it is, but only the operation of the radio transceiver 1a is set and controlled without transmitting a voice signal. Therefore, the method of use thereof relates to the two-wire single general transmission line of the present invention. This is the second stage of operation in.

③ If an abnormality occurs in the wireless facility in the site after the preparation stage, an alarm signal is transmitted / received for a short time (11c, 12c, 13c, 14c, 15c). In particular, the site blocks the voice / control system path, transmits / receives only the monitoring data, and then returns to the original path (16c, 17c, 18c, 19c, 20c, 21c, 22c, 23c, 24c). .

The control command in this process is transmitted as the path of (A and C of 9b, 10b, 11b, 14b and 15b, C and B of 6b, 5a and 14a, 9a → 11a), and the response / reception of the monitoring value accordingly. Is the path of (10a, 11a, 15a → 14a and A → C of 15a → 14a and C → A, 13b, 9b of 5a, 6b, 15b). Not only the stored data such as frequency / etc., But also the execution result of the setting according to the control command set by the user immediately before the operation (if the data is particularly long, for example, the detailed setting result of the frequency, etc.) can be received.

At this time, in particular, the switching controller 14b, which is operated by receiving the input of the control signal converter 11b, maintains the contact switching state of the switching circuit 15b during the period in which the supervisory data transmission command is issued and the response thereof is completed. When the reception is completed, the contact point is restored, and in response to such a path change, the transmission and reception operation in the voice and control system on the site are stopped until the control command transmission and response thereto are completed, and then the operation is stopped. Operation of the configuration in which the state is temporarily maintained is the third operation step of the present invention in a two-wire single general transmission line relating to a method of use.

Here, the order of the first operation to the third operation step does not interfere in the present invention even if the order is changed does not interfere in the present invention does not specify the order.

The present invention is not limited to the above embodiment, and various components shown as blocks in the drawings may be configured as a microprocessor or a computer, which is largely integrated externally, and it will be understood by those skilled in the art. The detailed description is omitted only.

In addition, the present invention can be utilized when configuring the transmission site using only the wireless transmitter 1a as well as the wireless transmitter, in which the reception amplifier 2a, the PTT tone attenuator 12a, the voice receiver amplifier 8b and the speaker 7b. Even if only delete, since it does not interfere with the operation of the transmitter by voice, it is regarded as equal means by the omission invention that can be omitted by omitting a part of the present invention, which is a prior art PTT tone and guard tone method of the prior art 3 In addition to the combination of the two-wire serial interworking method in technology 4, new switching circuits have been added to obtain new effects, which ultimately maintains the novelty and progress as a new invention.

In addition, since the present invention combines some of the configurations of the prior art 3 and the prior art 4 to take advantage of the PTT tone (continuous guard in the prior art 3 because it adds an additional new configuration to achieve a more excellent function tone) and 'analog line + serial connection of the Internet' in the prior art 4 can be extended to remotely operate in a plurality of arbitrary centers, of course, the present invention is a transmission key (1b), microphone ( 3b), the voice signal using the Voice over Internet Protocol (VoIP) technology of the Internet is linked to the speaker 7b, and the control and monitoring signal through the Internet is linked to the display and the operator 9b. Expanded linkage is possible with the configuration linked to technology 4.

In addition, the present invention can not only use a general leased line, but also can be used in a general telephone line consisting of 2 wires or a 2-wire line in a limited area arbitrarily installed in a ship, and the scope of its application is also applicable to coastal stations (intermediate wave). , Shortwave, ultra-short wave, etc.), or can be used as a communication in a ship or a voice command (command) facility in a ship, and in the case of a voice command facility, a microphone and a speaker for transmitting a voice can be switched immediately instead of the wireless transceiver. .

As can be seen from the above description, according to the present invention,

By effectively distinguishing two-way voice signals and two-way control / monitoring signals, which are transmitted in a single 2-wire line, there is no effect of mutual interference. Therefore, it reduces the facility and cost of the line in remote operation and simplifies configuration. The construction is simple, especially compared to the prior art 3 can take an independent configuration for each device, the maintenance is very convenient effect.

In addition, the present invention can be combined with the prior art 4 to fully reinforce the shortcomings in the prior art 3 to the prior art 4, while having the expandability to use it in common in the third operation center as in the prior art 3, 4 Has a ripple effect,

On the other hand, the efficient use method through the configuration of the present invention greatly simplifies the complicated operation operation in the prior art 3 as well as the excellent effect of solving the operation and response instability in the prior art 4.

Claims (1)

To be submitted later

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