KR102171186B1 - Apparatus and method for controlling a slave node in a multi-node system - Google Patents

Abstract

The present invention relates to a slave node control device for a multi-node system and a method thereof and, more specifically, to a slave node control device for a multi-node system and a method thereof, which can properly control slave node ID setting and slave node function setting. The slave node control device comprises: a master node which performs a controller function; and a plurality of slave nodes connected in series to the master node using one control line. The plurality of slave nodes measure cable capacitance of the control line, and assign ID of the slave nodes based on the measured value. The master node outputs a header signal to the control line so as to interlock the data of the plurality of slave nodes, and outputs a slave node ID signal for performing an arbitrary function and a data period setting signal for performing the function of the corresponding slave node. The plurality of slave nodes count the ID signal input through the control line and the data period setting signal as a synchronized clock signal to recognize the ID, and control the function performance during the data period setting signal. Therefore, the present invention can efficiently perform management and inspection of the plurality of slave nodes.

Description

Apparatus and method for controlling a slave node in a multi-node system}

The present invention relates to a slave node control device and method of a multi-node system, and more particularly, to a slave node control device and method of a multi-node system capable of appropriately controlling the ID setting of the slave node and the function setting of the slave node. About.

Recently, as interest and importance in marine resource exploration, marine environment monitoring, underwater military defense, etc. increase, demand for underwater communication capable of collecting various underwater information from the sea is increasing. An underwater communication network for transmitting underwater information is configured to install a plurality of sensor nodes capable of transmitting and receiving underwater information in an underwater environment, and acquire and control underwater information from the sensor nodes. In particular, for control of port monitoring and target tracking of an underwater vehicle, a control that collects information from a plurality of underwater sensors is required.

In addition, as the use of big data has increased rapidly in recent years, the server computer needs to perform a task of collecting information from a number of load devices. Even in this case, efficient control is required for collecting information between the service computer and a number of load devices.

1 shows an overall schematic diagram of a general multi-node system. In a conventional multi-node system, a plurality of slave nodes are used to perform their own functions by receiving each ID from a master node, and to perform a necessary function or collect necessary information through this.

1 is a diagram illustrating a connection configuration between a master node and a slave node in a multi-node system according to the prior art.

The conventional multi-node system is configured by connecting a plurality of slave nodes to a master node in a centralized manner. The master node performs the function of the controller.

A plurality of slave nodes are connected to the master node through a cable, and the slave nodes perform functions assigned to them or acquire necessary information. The master node controls communication with a plurality of slave nodes, collects information obtained from the slave nodes and transmits it to a network information station (not shown), or controls the operation of each slave node.

A plurality of slave nodes are centrally connected to one master node, and between the master node and each slave node, a first signal line (GPIO) transmitting the ID of each slave node and the function of each slave node The second signal line (serial or Ethernet) for execution is connected as many as the number of slave nodes being connected.

That is, the conventional multi-node system outputs a high or low signal to a plurality of first signal lines (general purpose input/output (GPIO)) in order to allocate an ID to each slave node, and each slave node Here's how to check it. Likewise, in the multi-node system, the control interlocking method is interlocked through serial or Ethernet by connecting several second signal lines between the master node and the slave node, respectively.

2 shows a connection configuration according to a relationship between a master node and a slave node between a controller and a plurality of devices in a network connection configuration.

As shown, when a controller performs the function of a master node and a plurality of devices are configured as slave nodes, a GPIO connection is made between the controller and a plurality of devices, and a high or low signal is output from the controller. A configuration for setting IDs for two slave nodes is shown.

In the conventional multi-node system with such a configuration, the master node transmits a signal for ID setting to the slave node through a GPIO signal line, and controls the function execution of the slave node. At this time, if an abnormal state of the hardware or application software of the master node occurs, the slave node does not receive ID assignment and a problem occurs in that the normal function cannot operate.

In addition, in the conventional multi-node system, as the number of slave nodes increases, the number of cable connections between the master node and the slave node increases. In addition, since the master node adopts a control method that allocates IDs from the slave nodes, the increase of slave nodes must change the hardware configuration.

In particular, the conventional multi-node system requires a lot of cable connection between the master node and the slave node, and this is a problem that requires a lot of cost and time for inspection and control of a plurality of slave nodes as well as information collection of slave nodes. Cause.

Therefore, there is a need to optimize a hardware connection relationship between a master node and a plurality of slave nodes, and a control environment capable of optimally controlling a plurality of slave nodes is required.

Accordingly, an object of the present invention is a slave node control device of a multi-node system capable of optimally configuring the number of cables between a master node and a plurality of slave nodes, and reducing time and hardware installation costs for inspection of a plurality of slave nodes. And to provide a method.

Another object of the present invention is to provide an apparatus and method for controlling a slave node of a multi-node system capable of setting its own ID setting by itself and efficiently controlling the execution of assigned functions of each slave node.

In order to solve the above technical problem, a slave node control apparatus of a multi-node system according to an embodiment of the present invention includes: a master node that performs a controller function; It includes a plurality of slave nodes connected in series to the master node using one control line, and the plurality of slave nodes measure the cable capacitance of the control line, and assign their ID based on the measured value, The master node outputs a header signal to the control line to interlock the data of a plurality of slave nodes, outputs a slave node ID signal for performing an arbitrary function and a data period setting signal for performing the function of the corresponding slave node. The slave node is characterized by counting the ID signal input through the control line and the data period setting signal as a synchronized clock signal to recognize the corresponding ID, and controlling the function execution during the data period setting signal.

Preferably, the master node is characterized in that it outputs a slave node ID signal for performing an arbitrary function as a continuous high signal, and outputs an ID confirmation signal using a continuous low signal.

Preferably, the master node is characterized in that it outputs a data period setting signal for performing an arbitrary function as a continuous high signal, and outputs a data period confirmation signal using the continuous low signal.

Preferably, the master node is characterized in that it comprises a function control transmitter for outputting a data signal through a control line, and a clock synchronization unit for outputting a clock signal.

Preferably, the plurality of slave nodes includes: a function control receiver for receiving a data signal through a control line; A capacitance measuring unit for measuring the cable capacitance of the control line; An automatic ID setting unit that assigns an ID to the measured capacitance value; A clock synchronization unit receiving a clock signal of a master node; And it characterized in that it comprises a function execution unit for controlling the execution of the function of the slave node.

Preferably, the plurality of slave nodes are characterized in that it further comprises a response transmitter for outputting a signal according to a result of performing the function to the master node.

A method for controlling a slave node in a multi-node system according to an embodiment of the present invention includes a method for controlling a slave node in a multi-node system including a master node and a plurality of slave nodes connected in series to the master node using one control line. The method of claim 1, wherein the plurality of slave nodes measure a cable capacitance of a control line, and assign their IDs based on the measured values; The master node outputs a header signal to a control line to link data of a plurality of slave nodes, and outputs a slave node ID signal for performing a function and a data period setting signal for performing a function of the slave node; The plurality of slave nodes include the step of counting the ID signal and the data period setting signal input through the control line as a synchronized clock signal to recognize the corresponding ID, and controlling the function execution during the data period setting signal. do.

Preferably, the master node is characterized in that it outputs a slave node ID signal for performing an arbitrary function as a continuous high signal, and outputs an ID confirmation signal using a continuous low signal.

Preferably, the master node is characterized in that it outputs a data period setting signal for performing an arbitrary function as a continuous high signal, and outputs a data period confirmation signal using the continuous low signal.

A slave node control device of a multi-node system according to another embodiment of the present invention is a slave node control device of a multi-node system used to track a target signal in an underwater environment, using a plurality of slave nodes and one control line. A master node to which a cable is connected; A plurality of slave nodes connected in series to the master node using one control line; The plurality of slave nodes measure the cable capacitance of the control line and assign their ID based on the measured value, and the master node outputs a header signal through the control line to link data of the plurality of slave nodes, A slave node ID signal for performing a certain function and a data period setting signal for performing the function of the corresponding slave node are output, and a plurality of slave nodes synchronize the ID signal and the data period setting signal input through the control line. It counts as a signal to recognize the ID, and detects a target during a data period setting signal.

Preferably, the detection signals of the plurality of slave nodes are collected through the master node, and the master node is characterized in that the collected detection signals are transmitted to the outside through the transceiver.

The slave node control apparatus and method of a multi-node system according to the present invention can optimally configure a cable connection between a plurality of slave nodes connected to a master node, and efficiently perform management and inspection of a plurality of slave nodes. You can get a good effect.

The slave node control apparatus and method of a multi-node system according to the present invention is a conventional slave node that fails to operate because the slave node in a normal state does not receive an ID through control in which the slave node automatically recognizes the ID using cable capacitance characteristics. It is possible to solve the problem.

The slave node control apparatus and method of a multi-node system according to the present invention is effective in controlling the synchronization of a plurality of slave nodes in a master node using high/low logic and clock signals without the need to install separate application software. Can be obtained.

The slave node control apparatus and method of a multi-node system according to the present invention can obtain an effect capable of efficiently collecting underwater information for use in tracking an underwater target in a master node connected to a plurality of load nodes.

1 is a diagram illustrating a connection configuration between a master node and a slave node in a multi-node system according to the prior art.
2 shows a connection configuration according to a relationship between a master node and a slave node between a controller and a plurality of devices in a network connection configuration.
3 is a diagram illustrating a connection configuration between a master node and a slave node of a multi-node system according to an embodiment of the present invention.
4 is a timing diagram illustrating an operation of a multi-node system according to an embodiment of the present invention.
5 and 6 are flowcharts of operation control when the multi-node system according to the present invention is applied to general equipment and used.
7 is a table configuration diagram for ID setting when the multi-node system according to the present invention is applied to general equipment and used.
8 is a control configuration diagram of an embodiment for using a multi-node system according to the present invention for tracking a target in an underwater environment.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. Suffixes "unit" and "unit", "module" and "unit", "unit" and "unit", "device" and "system", "terminal" and "node" for components used in the following description And “digital walkie-talkie” are given or mixed in consideration of only the ease of writing the specification, and do not have a distinct meaning or role from each other.

In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all modifications included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

3 shows an overall configuration diagram of a multi-node system according to an embodiment of the present invention.

The multi-node system includes a processor that performs the function of one master node 100. The master node 100 includes a function control transmission unit 120 for transmitting a signal for function control to a plurality of slave nodes, and a clock synchronization unit 110 for transmitting a clock signal to the plurality of slave nodes. And the master node 100 includes a response receiving unit 130 for receiving response signals from a plurality of slave nodes.

The multi-node system includes a plurality of slave nodes 200,300,400,...,1000. The plurality of slave nodes 200, 300, 400, ... 1000 are connected to one control line 150 from the master node 100 to the last slave node 1000. That is, it is connected like a serial connection configuration. Therefore, the control line 150 is sequentially connected to the slave node 1 (200), the slave node 2 (300), and the slave node 3 (400) with the function control transmission unit 120 of the master node 100 as a starting point. It is connected in series to slave node N+3 (1000).

The clock signal line 140 connected to the clock synchronization unit 110 of the master node 100 is connected to a cable so as to be branched and provided to a plurality of slave nodes 200,300,400,...,1000.

The reply line 160 connected to the response receiver 130 of the master node 100 is connected to a cable so as to branch to a plurality of slave nodes 200,300,....1000.

Therefore, in the embodiment of the present invention, the multi-node system connects one control line 150 in series between the master node 100 and a plurality of slave nodes 200,...1000, and the master node 100 ) And the plurality of slave nodes 200, ... 1000, the clock signal line 140 and the return line 160 are branched and connected to each of the slave nodes.

The slave node 1 200 includes a clock synchronization unit 210 connected to the clock signal line 140, a function control receiver 220 connected to the control line 150, and a capacitance measurement unit 240. The slave node 1 200 includes a response transmitter 160 connected to the return line 160. In addition, it further includes a function execution unit 230, an automatic ID setting unit 250, and an inspection unit 270.

The configuration included in the slave node 1 200 can be described as a configuration included in all other slave nodes.

In particular, looking at the connection relationship between the slave nodes connected to the control line 150 in more detail, the control line 150 started from the function control transmission unit 120 of the master node 100 is It is configured to be connected to the function control receiving unit 220 and the capacitance measuring unit 240, and to the slave node 2 300 through the connection point (A). With this configuration, the control line 150 is continuously connected to the slave node 2 300 and the slave node 3 400, and this configuration is continuously connected to the last slave node N+3 (1000).

The operation of the multi-node system according to an embodiment of the present invention configured as described above is performed as follows.

In the multi-node system of the present invention, a plurality of slave nodes set their own IDs. To this end, each slave node is serially connected to one control line 150 in hardware based on the function control transmission unit 120 of the master node 100. That is, all slave nodes are connected in series to one cable.

The slave node 1 200 measures the cable capacitance of the control line 150 by the capacitance measuring unit 240. In general, the capacitance has a higher value as the distance from the master node 100 increases. The automatic ID setting unit 250 sets an automatic ID based on the measured cable capacitance.

Since all slave nodes are configured in series connected to one control line 150 with the master node 100 as a starting point, the capacitance of each slave node has a different value. Therefore, each slave node has a different ID because the ID is automatically set based on the capacitance of a different value.

To this end, the automatic ID setting unit 250 presets and stores a table in which the cable capacitance, the ID to be assigned, and the number of clocks are matched based on the experimental value. Then, the ID corresponding to the measured capacitance is set as the ID of the slave node. In general, when the capacitance measured by the capacitance measurement unit 240 of the slave node 1 200 is the lowest value, the lowest automatic ID may be assigned. When the capacitance measured by the capacitance measurement unit of the slave node N+3 (1000) has the highest capacitance, the slave node N+3 (1000) is assigned the highest automatic ID.

When IDs are automatically assigned to the plurality of slave nodes as described above, a control process for assigning IDs of the slave nodes in the master node 100 may be omitted. This has the effect of reducing the amount of operating load between the master node 100 and a plurality of slave nodes. In addition, when the ID assignment of the master node 100 is abnormal in the related art, a slave node that cannot operate normally has occurred. However, in the present invention, since the slave node can operate by being assigned an ID by itself, efficient operation of the slave node is possible.

Meanwhile, the slave node 1 200 performs a first function, and the slave node 2 300 performs a second function. Similarly, the slave node N+3 (1000) performs control for performing other functions.

The multi-node system of the present invention uses a clock synchronization method for synchronization of a plurality of slave nodes. That is, the master node 100 and a plurality of slave nodes in the multi-node system of the present invention use the clock line 140 by branching. Therefore, the clock signal generated by the clock synchronization unit 110 of the master node 100 is transmitted to the clock synchronization unit 210 of all slave nodes through the clock signal line 140, as shown in FIG. 4(a). It is provided identically to synchronize the clocks between the plurality of slave nodes.

As described above, since the slave nodes of the present invention apply synchronization of clock signals, there is no need to mount application software used in the interlocking control method through serial or Ethernet in the conventional system.

And the function control transmitter 120 of the master node 100 outputs a header signal corresponding to the end time (3 clocks) + trigger flag (1 clock) + start time (3 clocks) through the signal line 150, Controls data linkage between all slave nodes.

Thereafter, the function control transmission unit 120 outputs a function control signal to be performed. The master node 100 tabulates and stores the capacitance, ID, function, and number of clocks of its own load nodes through values based on experimental values. Therefore, when it is necessary to perform an arbitrary function, an ID corresponding to a slave node to perform the function is output through the signal line 150. At this time, the output of the ID of the slave node is performed by outputting a high level signal T1 that is continuous by a preset number of clocks according to the ID.

Subsequently, the function control transmission unit 120 of the master node 100 outputs the ID of the slave node for performing an arbitrary function, and then outputs a data period setting signal T2 for performing the corresponding function. This operation is performed by outputting an ID setting signal from the function control transmission unit 120 and then outputting a continuous high signal during a data period for the operation of the function.

The function control receiving unit 220 of the slave node 1 200 counters a clock signal of a continuous high signal provided through the signal line 150 as shown in FIG. 4B (period T1), When the number of clocks matching the ID set in the automatic ID setting unit 250 is used, it is used as its own function control signal.

In addition, after the function control receiver 220 of the slave node 1 200 recognizes its ID, it recognizes the signal input through the control line 150 as a data period setting signal for performing the function. During the data period T2 recognized by the function control receiver 220, the function execution unit 230 performs a setting function of the slave node 1 200.

The function execution unit 230 is preset and stored so that the corresponding function can be operated for each corresponding slave node, from performing a simple hardware function to performing a function by a complex firmware operation.

Slave node 1 (200) performs a function assigned to itself through the function execution unit 230, and, if necessary, sends a transmission signal indicating that the function has been normally performed through the response transmission unit 260 to the return line 160 It is transmitted to the master node 100 through. The master node 100 receives a signal through the response receiver 130 and checks the normal operation of the slave node 1 200.

The function control receiver of the slave node 2 300 counts the clock signal of a continuous high signal provided through the signal line 150 as shown in Fig. 4(c), and the ID set in the automatic ID setting unit When it matches the number of clocks matched to, it is used as its own function control signal.

In addition, after the function control receiver of the slave node 2 300 recognizes its ID, the signal input through the control line 150 is recognized as a data period setting signal T3 for performing a function. During the data period recognized by the function control receiver, the function execution unit performs the setting function of the slave node 2 300.

In this way, the function control receiver in all slave nodes uses the input signal after the header signal input through the signal line 150 as a signal T1 for ID verification of the slave node. And the input signal after the ID signal is used as the data period setting signals (T2, T3, T4) for the operation of the corresponding slave node.

The data period setting signals T2, T3, and T4 are signals output from the master node 100 during a period appropriate for the execution of each function, and the corresponding slave node performs its function during the set data period.

Next, a control operation when a multi-node system according to an embodiment of the present invention is applied to general equipment and used will be described.

5 and 6 are flowcharts of operation control when the multi-node system according to the present invention is applied to general equipment and used.

7 is a table configuration diagram according to ID setting when the multi-node system according to the present invention is applied to general equipment and used.

The multi-node system of the present invention can be applied to and used in a monitoring system (big data server computer) using a plurality of equipment. In this configuration, the controller performs the function of the master node, and a number of devices are replaced with the configuration of the slave node.

The monitoring system gives each equipment its own independent function, and each equipment has an independent function fixedly performed. In this case, the management of multiple devices is controlled using the device ID in the controller, and each device has the same hardware configuration for capacitance measurement and clock synchronization, but the configuration of the function execution unit according to the execution of each independent function is different. It can be controlled by state.

In the present invention, ID setting is not required between the controller and a plurality of devices. This is because each device assigns its own ID through capacitance measurement by simply connecting a cable to the controller.

Meanwhile, the controller controls the operation of the plurality of slave nodes. That is, an end time signal, a trigger signal, and a start signal are sequentially generated and output through the control line (steps 2000 to 2020). In addition, the controller generates and outputs a slave node ID signal to perform an arbitrary function and a data period setting signal to perform the function (steps 2030 and 2040).

The plurality of devices check the end time signal (3 clocks), trigger signal (1 clock), and start signal (3 clocks) input through the control line (step 3000), and if the signal matches a preset state, continuous Thus, the input signal is recognized as a node ID signal, and it is checked whether it matches its own node ID (step 3010).

That is, a plurality of devices identify node IDs by counting consecutive high signals as a synchronized clock signal (T1 period in FIG. 4b) using a tabled value of the number of clocks and node IDs shown in FIG. 7 do. Then, the node ID is checked by counting consecutive low signals. That is, as shown in FIG. 4B, the period T1 is a signal for transmitting the node ID, and the continuous T1' signal is a signal for reconfirming the node ID. Therefore, the T1 period and the T1' period must have the same value when the clock signal is counted.

Thereafter, a continuous high signal is counted as a synchronized clock signal, and a data period for performing a function is recognized (step 3020).

Then, the function execution period of step 3020 is checked, the continuously inputted low signal is counted as a synchronized clock signal, and used as a signal to reconfirm the command of the function execution period (step 3030). That is, as shown in FIG. 4B, the T2 period is a signal for confirming the data period for performing a function, and the continuous T2' signal is a signal for reconfirming the data period for performing the function. Therefore, the T2 period and the T2' period must have the same value when the clock signal is counted. Likewise, the clock signal count value of the T3 period and the T3' period must be the same, and the clock signal count value of the T4 and T4' period must be the same.

When the value counted in step 3020 and the value counted in step 3030 are the same, the slave node performs the function assigned to it (step 3040).

In the monitoring system, slave node 1 may be configured to perform a power control request function. Slave node 2 may be configured to perform an online information request function, and slave node 3 may be configured to perform a reboot request function. That is, in the monitoring system, a plurality of slave nodes are set to perform different functions, so that it is possible to appropriately control the operation under the control of the controller.

Next, Figure 8 is a control configuration diagram of an embodiment for using the multi-node system according to the present invention for tracking a target in an underwater environment.

The multi-node system according to an embodiment of the present invention can be used to detect target information in an underwater environment. When detecting target information in port monitoring or underwater environment, information is collected from a plurality of underwater sensors, and the collected information is transmitted to the monitoring station.

Therefore, in the multi-node system of the present invention, a plurality of slave nodes (60, 65, ....70) are connected to the master node (55) by cable, and installed in various places in the underwater environment, so that the underwater acoustic signal (generated from the submarine Sound signal). Slave nodes may be directional frequency and ranging (DIFAR) sonobuoys.

The master node 55 collects sound signals detected from a plurality of slave nodes, and provides the detected sound signal to the signal processing unit 50 so that it can be used as basic information to detect information of an underwater target. The signal processing unit 50 may include a battery.

When an underwater target is detected based on the acoustic signals detected from a plurality of slave nodes, the signal processing unit 50 transmits it to the transmission/reception unit 30 and transmits the RF to a monitoring station (not shown) through the transmission/reception unit 30. Allow transmission to take place.

At this time, the transmission/reception unit 30 is connected to the buoy 20 that can float to the sea level, so that the RF signal can be transmitted through the antenna 10 to be controlled. The transceiver 30 may include a memory, an RF antenna, and a battery.

And when the buoy 20 floats on the sea level, a separation unit 40 for separating the cable connection between the transmission/reception unit 30 and the signal processing unit 50 is additionally provided, and the separation unit 40 through electrical signal control. It is preferable that the cable is configured to be separated.

In the multi-node system according to an embodiment of the present invention configured as described above, a plurality of slave nodes installed on the seabed using an anchor and connected through cables detect a target within a certain range of the seabed, and the detected signal Is configured to be able to detect

In general, in order to track a target in an underwater environment, it is controlled to simply connect several slave nodes to hundreds of slave nodes and acquire underwater information from each of the slave nodes. Therefore, when hundreds of slave nodes are connected, ID allocation is first required for communication control between the master node and hundreds of slave nodes. However, in the embodiment of the present invention, each slave node has its own capacity by measuring its own capacitance. Since the ID is configured to be automatically set, this process is omitted.

The plurality of slave nodes 60,65,...,70 are clock-synchronized under the control of the master node 55, and detect an underwater acoustic signal (eg, an acoustic signal generated from an enemy submarine). At this time, the master node 55 continuously outputs an end time signal, a trigger signal, and a start time signal, which are header signals according to a preset number of clocks, interlocks with data, and controls slave nodes requiring operation.

In an underwater environment, only some of the slave nodes may require operation due to various requirements. For example, depending on the conditions of the operating frequency band, only some of the slave nodes (..., 70) at a distance from the master node 55 are operated or, conversely, some of the slave nodes (... You may want to get information from slave nodes (60,...).

In this way, the master node 55 needs to select a slave node that satisfies the current operating conditions, and it is necessary to check the operation state and the like from the corresponding slave node. Due to these various factors, the master node 55 outputs an ID of a slave node requiring an operation among a plurality of slave nodes, and performs control according to the subsequent function execution.

For example, in order to control the operation of the slave nodes 1, 2, and 3, the master node 55 continuously outputs a high signal T1 corresponding to the ID signal of the slave node 1 60 after the header signal is output. . Slave node 1 (60) counts the continuous high signal (T1) as a clock signal, and recognizes that it should operate. Slave node 1 60 checks the continuous low signal T1', reconfirms its ID, and then recognizes the continuous signal T2 as a data cycle for performing a function. Then, by checking the continuous signal T2', the request for function performance is reconfirmed, and a signal for target tracking is detected during the T2 time period. The signal detected in this way is provided to the master node 55 through the response transmitter 260.

When the operation of the slave node 1 (60) is completed, the master node 55 controls the operation of the slave node 2 (65). As shown in FIG. 4C, the master node 55 outputs a header signal and a high signal (rising 5 clock signal) corresponding to the ID signal of the slave node 2 65. Slave node 2 (65) counts the continuous high signal as a clock signal and recognizes its own ID. Slave node 2 (65) checks the continuous low signal, reconfirms its ID, and then recognizes the continuous signal T3 as a data cycle for performing a function. Then, the continuous signal (T3') is checked, the request for function performance is reconfirmed, and a signal for target tracking is detected during T3 time. The signal detected in this way is provided to the master node 55 through the response transmitter.

When the operation of the slave node 2 65 is completed, the master node 55 controls the operation of the slave node 3. As shown in Fig. 4D, the master node 55 outputs a header signal and a high signal (rising 7 clock signal) corresponding to the ID signal of the slave node 3. Slave node 3 counters a continuous high signal as a clock signal and recognizes its own ID. Slave node 3 checks the continuous low signal, reconfirms its ID, and then recognizes the continuous signal T4 as a data cycle for performing the function. Then, by checking the continuous signal T4', the request for function performance is reconfirmed, and a signal for target tracking is detected during the T4 time period. The signal detected in this way is provided to the master node 55 through the response transmitter.

The master node 55 collects the detection signals of the slave nodes and transmits them to the signal processing unit 50. The signal processing unit 50 determines whether the detection signal of the collected slave nodes is greater than the reference value and continues for a reference time or longer. The signal processing unit 50 detects target information based on the detection signal when the detection signal is greater than the reference value and lasts longer than the reference time. In addition, the information corresponding to the target information is transmitted to the transmission/reception unit 30, and the transmission/reception unit 30 and the signal processing unit 50 are separated by electrical control of the separation unit 40, and the transmission/reception unit 30 by the buoy 20 ) Is controlled to float to the sea level. The transmission/reception unit 30 transmits the detected target information to a monitoring station (not shown) through RF transmission.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: master node 200,300,400,...,1000: slave node
120: function control transmission unit 110,210: clock synchronization unit
220: function control receiver 240: capacitance measurement unit

Claims (11)

A master node performing a controller function;
It includes a plurality of slave nodes connected in series to the master node using one control line,
A plurality of slave nodes measure the cable capacitance of the control line, assign their ID based on the measured value, and
The master node outputs a header signal to the control line to interlock the data of a plurality of slave nodes, outputs a slave node ID signal for performing arbitrary functions and a data period setting signal for performing the function of the corresponding slave node,
The plurality of slave nodes count the ID signal input through the control line and the data period setting signal as a synchronized clock signal to recognize the corresponding ID, and control the function execution during the data period setting signal,
The master node is a slave node control device of a multi-node system that outputs a slave node ID signal for performing a certain function as a continuous high signal and outputs an ID confirmation signal using a continuous low signal.
delete The method according to claim 1,
The master node is a slave node control device of a multi-node system that outputs a data period setting signal for performing a certain function as a continuous high signal and outputs a data period confirmation signal using a continuous low signal.
The method according to claim 1,
The master node is a slave node control device of a multi-node system including a function control transmitting unit for outputting a data signal through a control line and a clock synchronization unit for outputting a clock signal.
The method according to claim 1,
The plurality of slave nodes may include a function control receiver configured to receive a data signal through a control line;
A capacitance measuring unit for measuring the cable capacitance of the control line;
An automatic ID setting unit that assigns an ID to the measured capacitance value;
A clock synchronization unit receiving a clock signal of a master node; And
A slave node control device of a multi-node system including a function execution unit that controls the function execution of the slave node.
The method of claim 5,
A plurality of slave nodes, the slave node control device of a multi-node system further comprising a response transmitter for outputting a signal according to the function execution result to the master node.
In the slave node control method of a multi-node system including a master node and a plurality of slave nodes connected in series to the master node using one control line,
The plurality of slave nodes may measure the cable capacitance of the control line and assign their IDs based on the measured values;
The master node outputs a header signal to a control line to link data of a plurality of slave nodes, and outputs a slave node ID signal for performing a function and a data period setting signal for performing a function of the slave node;
The plurality of slave nodes include the step of counting the ID signal and the data period setting signal input through the control line as a synchronized clock signal to recognize the corresponding ID, and controlling the function execution during the data period setting signal,
The master node outputs a slave node ID signal for performing an arbitrary function as a continuous high signal, and outputs an ID confirmation signal using a continuous low signal. The slave node control method of a multi-node system.
delete The method of claim 7,
The master node outputs a data period setting signal for performing an arbitrary function as a continuous high signal, and a data period confirmation signal using a continuous low signal, a slave node control method of a multi-node system.
In the slave node control device of a multi-node system used to track a target signal in an underwater environment,
A master node connected by cables using a plurality of slave nodes and one control line;
A plurality of slave nodes connected in series to the master node using one control line;
A plurality of slave nodes measure the cable capacitance of the control line, assign their ID based on the measured value, and
The master node outputs a header signal through the control line to interlock the data of a plurality of slave nodes, outputs a slave node ID signal for performing a certain function and a data cycle setting signal for performing the function of the corresponding slave node,
The plurality of slave nodes count the ID signal input through the control line and the data period setting signal as a synchronized clock signal to recognize the ID, detect the target during the data period setting signal, and
The master node outputs a slave node ID signal for performing a certain function as a continuous high signal, and outputs an ID confirmation signal using a continuous low signal,
The master node is a slave node control device of a multi-node system that outputs a data period setting signal for performing a certain function as a continuous high signal and outputs a data period confirmation signal using a continuous low signal. The method of claim 10,
A slave node control device of a multi-node system in which the detection signals of a plurality of slave nodes are collected through the master node, and the collected detection signals are transmitted to the outside through the master node.

Images