KR20190068667A - Wireless network for controlling sink between sensors - Google Patents

Abstract

The present invention relates to a wireless network for controlling synchronization between sensors, a method for controlling the synchronization, and a motion analysis system using the wireless network for controlling the synchronization between sensors. More specifically, the present invention relates to the wireless network for controlling a synchronization between sensors, which is able to, on the network with a master wirelessly connected to a plurality of slaves respectively having a unique ID, control the synchronization of a sensor unit placed in each of the plurality of slaves, comprising: the master which gives a broadcast command to the plurality of slaves at the same time; and the plurality of slaves which, when receiving the broadcast command, save measurement data measured by the sensor unit in a temporary storage unit at the same time. After the measurement data are stored, the plurality of slaves transmit the measurement data successively to the master.

Description

[0001] The present invention relates to a wireless network, and more particularly, to a wireless network,

The present invention relates to a sensor-based synchronization control wireless network, a sink adjustment method, and a motion analysis system using a sensor-to-sensor synchronization control wireless network.

The nodes constituting the sensor network have their own time information. In order to express specific information, it is necessary that the time information of some or all of the nodes is synchronized.

Therefore, in a wireless mobile communication system, it is common to install GPS in a system for time synchronization. However, in a low-power-oriented network such as a sensor network, , There are many limitations in using existing synchronization methods using equipment such as GPS which consumes a lot of high-cost power such as GPS.

Therefore, many synchronization methods suitable for sensor networks have been studied. Typical synchronization methods include exchange of time stamps such as RBS (Reference Broadcasting Synchronization), TPSN (Timing-Sync Protocol for Sensor Networks), FTSP Time synchronization method.

RBS (J. Elson, L. Griod, D. Estin, "Fine-Grained Network Time Synchronization using Reference Broadcasts ", 2002) is a representative scheme having a receiver-receiver synchronization structure. When one sender broadcasts a beacon, a plurality of receivers record their beacon times, compare them with each other, and time-synchronize with each other. In this method, the packet overhead increases sharply as the number of nodes constituting the network increases. In case of multi-hop, time synchronization must be performed through the connection node using a time-routing method.

TPSN (S. Ganeriwal, R. Kumar, M. Srivastava, "Timing-Sync Protocol for Sensor Networks ", 2003) is a representative scheme with a synchronizer structure of the sender-receiver. It uses a traditional hierarchical two-way synchronous delivery method in which one sender delivers synchronization to the next one receiver. Therefore, as the number of children of a node increases, the number of synchronous packet transmissions that the parent node should send and receive increases. And can not respond dynamically to changes in network topology.

The FTSP (Miklos Maroti, Branislav Kusy, Gyula Simon, Akos Ledeczi, "The Flooding Time Synchronization Protocol", 2004) also has a synchronizer structure of the sender-receiver. This method avoids duplicate propagation of synchronization packets using synchronous sequences and is inefficient by using multiple timestamps in one packet.

Accordingly, there has been a need for an efficient time synchronization method capable of dynamically adapting to the configuration of a changing network by solving the disadvantages of the conventional methods as described above.

Korean Patent No. 1000795 Korean Patent No. 0726476 Japanese Patent No. 5449208 Korea Patent No. 1697243

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an inter-sensor sink control network, which comprises a master for simultaneously issuing a broadcast command to a plurality of slaves, And a plurality of slaves for storing measurement data measured by the sensor unit in the temporary storage unit at the same time when receiving the measurement data. After storing the measurement data, the plurality of slaves sequentially transmit the measurement data to the master, Time synchronization with data stored in the forest stor- age unit of the storage device of FIG.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

An object of the present invention is to provide a network for controlling synchronization of a master and a sensor unit provided in each slave on a network in which a plurality of slaves each having a unique ID are connected wirelessly, Master; And a plurality of slaves, each of which stores measurement data measured by the sensor unit in a temporary storage unit at the same time when receiving the broadcast command, and after storing the measurement data, the plurality of slaves successively transmit the measurement data To the master, to the master.

And a master includes an instruction unit that simultaneously transmits a broadcast instruction to the plurality of slaves in a specific period and a reception unit that receives the measurement data sequentially transmitted, and the slave receives a broadcast instruction from the master A transfer unit for transferring the measurement data stored in the temporary storage unit to the master and a slave having the previous ID and connected wirelessly to the slave having the previous ID, And a determination unit for controlling the transmission unit to transmit the measurement data stored in the temporary storage unit to the master when it is determined to be completed.

In addition, a time identifier is recorded in the measurement data stored in each of the temporary storage units simultaneously with the broadcast command and the broadcast command, and the master classifies and stores the measurement data received for each time identifier by time And a storage unit for storing the image data.

The determination unit may transmit the communication error data to the master when it is determined that the measurement data transmission is not completed in the slave having the previous ID within a predetermined time.

In addition, the master may determine that a communication error occurs if all of the measurement data are not received in the plurality of slaves within the predetermined period.

A second object of the present invention is to provide a method for controlling synchronization of a master and a sensor unit provided in each slave on a network in which a plurality of slaves each having a unique ID are wirelessly connected, A first step of simultaneously transmitting a broadcast command to a slave of the mobile terminal; The command receiving unit of each of the plurality of slaves receives the broadcast command and transmits the measured data measured by the transmitting unit of the slave 0 to the master at the same time as receiving the broadcast command, A second step of storing measurement data measured by the sensor unit; And a third step of transmitting the measurement data stored in the temporary storage unit of the n-th slave to the master when the determination unit of the n-th slave determines that the transfer of the measurement data in the n-1 slave is completed Can be achieved as a method of adjusting a sink-to-sensor sink

In the second step and the third step, in the measurement data stored in each of the temporary storage units simultaneously with the broadcast command, the time identifier of the time identifier is also recorded in the second step and the third step, And the storage unit of the master categorizes and stores the measurement data received for each time identifier by time.

In the third step, when it is determined that the measurement data transmission is not completed in the slave having the previous ID within a predetermined time, the determination unit transmits the communication error data and the measurement data stored in its temporary storage unit to the master .

A third object of the present invention is to provide a motion analysis system using a sensor, comprising: an inter-sensor sink adjustment network according to the first object of the present invention; A receiving unit receiving a group of measurement data stored for each time identifier in a master of the sink control network; A motion detector for calculating motion information data based on the measurement data group received by the receiving unit; And a motion analyzer for analyzing a motion and a posture based on the motion information data. The motion analyzing system using the inter-sensor sync control wireless network may be achieved.

The sensor unit included in each of the plurality of slaves of the sink control network may be at least one of a joint sensor, an acceleration sensor, an angular velocity sensor, and a gyro sensor mounted on the body. The motion recognition unit may include at least one of the joint sensor, And receiving the measured data from the gyro sensor and calculating the exercise information data.

According to an inter-sensor sink control network according to an exemplary embodiment of the present invention, a master for simultaneously issuing a broadcast command to a plurality of slaves, The plurality of slaves sequentially transmit the measurement data to the master and the transmitted data are simultaneously stored in the master storage unit of the slave to correspond to the time synchronized data So that the time synchronization can be efficiently performed.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 is a configuration diagram of a sensor-to-sensor sink control wireless network according to an embodiment of the present invention;
2 is a block diagram of an inter-sensor sink adjustment wireless network according to an embodiment of the present invention.
FIG. 3 is a flowchart of a synchronization method using an inter-sensor sink adjustment wireless network according to an embodiment of the present invention;
4 is a configuration diagram of a motion analysis system using an inter-sensor sink adjustment wireless network according to an embodiment of the present invention.
5 is a flowchart of a motion analysis method using an inter-sensor sink adjustment wireless network according to an embodiment of the present invention.
FIG. 6 illustrates an application example of a motion analysis system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the configuration and function of the inter-sensor sink control wireless network 1 according to the embodiment of the present invention and the method of adjusting the sensor-to-sensor sink will be described. First, FIG. 1 shows a configuration diagram of a sensor-to-sensor sink control wireless network 1 according to an embodiment of the present invention. 2 shows a block diagram of an inter-sensor sink control wireless network 1 according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a synchronization method using the inter-sensor sink control wireless network 1 according to an embodiment of the present invention.

2, the inter-sensor sink adjustment network 1 according to the embodiment of the present invention includes a master 10 that simultaneously issues a broadcast command to a plurality of slaves 20, And a plurality of slaves 20 for storing measurement data measured by the sensor unit 21 in the temporary storage unit 24 at the same time.

The slave 20 having the ID number O transmits the measured data measured by the sensor unit 21 to the master 10 at the same time as receiving the command, 20 store the measurement data in its temporary storage unit 24 at the same time as receiving the command and sequentially transmit the measurement data to the master 10. Therefore, all the measurement data transmitted from the master 10 corresponds to the measurement data synchronized at the time of the command. The sensor unit 21 may be a joint sensor attached to a human body, an acceleration sensor, an angular velocity sensor, a gyro sensor, or the like.

2, the master 10 includes an instruction unit 11, a reception unit 12, a storage unit 13, a transmission unit 14, a setting unit 15, an analysis unit 16 ), And the like. The setting unit 15 sets a specific period for transmitting the broadcast command.

The command unit 11 simultaneously transmits a broadcast command to a plurality of slaves 20 every predetermined period set by the setting unit 15. [ The receiving unit 12 sequentially receives the measurement data transmitted from the respective slaves 20, and the storage unit 13 stores the measured data by time.

2, the slave 20 having the ID 0 includes the sensor unit 21, the command receiving unit 22 and the transmitting unit 23, and the remaining slaves 20 May include a sensor unit 21, an instruction reception unit 22, a transmission unit 23, a temporary storage unit 24, and a determination unit 25.

The command receiving unit 22 receives the broadcast command from the master 10, and the temporary storage unit 24 stores measurement data at the same time as receiving the command. The transfer unit 23 is configured to transfer the measurement data stored in the temporary storage unit 24 to the master 10.

The determination unit 25 determines whether the measurement data transmission of the slave 20 having the previous ID is completed by wirelessly connecting with the slave 20 having the previous ID. If it is determined that the transmission is completed, And controls the transfer unit 23 to transfer the measurement data stored in the RAM 24 to the master 10.

The time identifier is recorded in the measurement data stored in each of the temporary storage units 24 simultaneously with the broadcast command and the broadcast command and the storage unit 13 of the master 10 stores the measurement data Are classified and stored by time. The transmitting unit 14 of the master 10 is configured to transmit the data stored in the storing unit 13 to a receiving unit such as a motion analysis system.

The determination unit 25 of the slave 20 causes the communication error data to be transmitted to the master 10 when it is determined that the measurement data transmission is not completed in the slave 20 having the previous ID within the specified time. In other words, the master node 10 transmits to the master 10 information that its own previous ID slave 20 is not transmitting measurement data. After the slave 20 transmits the communication error data, the slave 20 may terminate the data transmission or transmit the communication error data and transmit the measurement data stored in its temporary storage unit 24 to the master 10.

Also, the master 10 determines that a communication error occurs if all of the measurement data are not received in the plurality of slaves 20 within a specific period.

Hereinafter, a method for adjusting the sink-to-sensor sink using the aforementioned sink control wireless network 1 according to the present invention will be described. FIG. 3 shows a flow chart of a method of adjusting a sink according to the present invention. And a method for adjusting the sink of a sensor unit 21 provided in each slave 20 on a network in which a master 10 and a plurality of slaves 20 each having a unique ID are wirelessly connected.

First, the command unit 11 of the master 10 simultaneously transmits a broadcast command to a plurality of slaves 20 at a specific period (S1).

At the same time as the reception of the broadcast command by the command receiving unit 22 of each of the plurality of slaves 20, the transmitting unit 23 of the 0th ID slave 20 transmits the measurement Data is transmitted to the master 10 and the temporary storage unit 24 of the remaining plurality of slaves 20 simultaneously stores the measurement data measured by the sensor unit 21 at step S2.

When the determination unit 25 of the n-th slave 20 determines that the measurement data transmission in the n-1 slave 20 is completed, the measurement data stored in the temporary storage unit 24 of the n-th slave 20 is transmitted to the master (Step S3).

This step S3 is continued until the master 10 receives the measurement data of all the slaves 20 (S4). The steps S1, S2, S3, and S4 are repeated until the measurement is completed (S5).

In step S2 and step S3, the time identifier is recorded in the measurement data stored in each of the temporary storage units 24 at the same time as the broadcast command, and the time identifier is recorded in the master 10 stores the measurement data received for each time identifier by time.

If the determination unit 25 determines in step S3 that the measurement data transmission is not completed in the slave 20 having the previous ID within the predetermined time, the communication error data and the measurement data stored in the temporary storage unit 24 To the master (10).

Hereinafter, the training system 100 to which the above-mentioned error correction apparatus is applied will be described. FIG. 4 shows a block diagram of a motion analysis system using the inter-sensor sink adjustment wireless network 1 according to an embodiment of the present invention. And FIG. 5 is a flowchart illustrating a method of analyzing motion using the inter-sensor sink control wireless network 1 according to an embodiment of the present invention. 6 illustrates an application example of a motion analysis system according to an embodiment of the present invention.

The motion analysis system 100 using the inter-sensor sink adjustment wireless network 1 according to the embodiment of the present invention includes the above-described inter-sensor sink adjustment wireless network 1 and a synchronized slave A motion detector 120 for calculating motion information data based on the joint angle and the amount of exercise based on the measurement data received by the receiver unit 110, And a motion analyzer 130 for analyzing the motion and the posture based on the motion information data.

As described above, the sensor unit 21 provided in the slave 20 includes a joint sensor, an angular velocity sensor, an acceleration sensor, and a gyro sensor attached to a human body, and measures data measured in real time in each slave 20 The measurement data stored in the master 10 by time according to the above-described synchronization method and classified by time are transmitted to the receiving unit 110 through the transmitting unit 14 of the master 10 (S10).

The motion detection unit 120 calculates motion information data on the joint angle, the joint motion range, and the angular velocity based on the measurement data received by the reception unit 110 through the transmission unit 14 of the master 10 S20). That is, the motion detection unit 120 receives the measured values from the joint sensor 30 and the sensor unit 21 of the slave 20 including the acceleration sensor, the angular velocity sensor, and the gyro sensor, To be collected.

The motion analyzer 130 analyzes the motion and posture based on the motion information data generated by the motion detector 120 (S30). In the database 140, standard motion information data on the standard joint angle, the amount of exercise, and the exercise attitude according to the type of exercise are DB and stored.

Accordingly, the motion analyzer 130 generates training information by comparing and analyzing the standard exercise information data and the measured exercise information data. The information informing unit 131 guides the user to the training information, which is the comparative analysis data analyzed by the motion analyzer 130 (S40)

The motion notification unit 120, the motion analysis unit 130, the database 50, the correction unit 40, and the information notification unit 131 are provided in the user terminal . The display unit 132 may be configured to display the measured motion information data, standard motion information data, and comparison analysis data on the screen according to an instruction and display the same to a user.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: Synchronization between sensors Wireless network
10: Master
11: Command section
12: Receiver
13:
14:
15: Setting section
16: Analysis department
20: Slave
21:
22: Command receiver
23:
24: Temporary storage unit
25:
100: Synchronization control between sensors Motion analysis system using wireless network
110: Receiving unit
120: Motion in Branch
130: motion analysis unit
131: Information notification unit
132:
140: Database

Claims (10)

1. A network for controlling synchronization of a master and a plurality of slaves each having a unique ID on a wirelessly connected network,
A master for simultaneously issuing a broadcast command to a plurality of slaves; And
Each of the plurality of slaves storing measurement data measured by the sensor unit in a temporary storage unit at the same time when receiving the broadcast command,
And after storing the measurement data, the plurality of slaves sequentially transmit the measurement data to the master.
The method according to claim 1,
The master,
An instruction unit that simultaneously transmits a broadcast instruction to the plurality of slaves at a specific cycle; and a reception unit that receives the measurement data sequentially transmitted,
The slave includes:
A transmission unit for transmitting the measurement data stored in the temporary storage unit to the master; and a transmission unit for transmitting the measurement data of the slave having the previous ID wirelessly to the slave having the previous ID, Wherein the control unit controls the transmitting unit to transmit the measurement data stored in the temporary storage unit to the master when it is determined that the transmission has been completed and that the transmission is completed.
The method according to claim 1,
The time identifier is recorded in the measurement data stored in each of the temporary storage units simultaneously with the broadcast command and the broadcast command,
Wherein the master comprises a storage unit for sorting and storing the measurement data received for each time identifier by time.
3. The method of claim 2,
Wherein the determination unit transmits the communication error data to the master when it is determined that the measurement data transmission is not completed in the slave having the previous ID within a predetermined time.
3. The method of claim 2,
Wherein the master determines that a communication error occurs if all the measurement data are not received in the plurality of slaves within the predetermined period.
A method for controlling synchronization of a sensor unit provided in each slave on a network in which a master and a plurality of slaves each having a unique ID are wirelessly connected,
A first step of simultaneously transmitting a broadcast command to a plurality of slaves in a specific period of a command part of a master;
The command receiving unit of each of the plurality of slaves receives the broadcast command and transmits the measured data measured by the transmitting unit of the slave 0 to the master at the same time as receiving the broadcast command, A second step of storing measurement data measured by the sensor unit; And
and a third step of transmitting measurement data stored in the temporary storage unit of the n-th slave to the master when the determination unit of the n-th slave determines that the measurement data transmission in the n-1 slave is completed. How to adjust the liver sink.
The method according to claim 6,
Wherein in the first step and the third step, the time identifier at the time of the command is recorded in the broadcast command, and in the measurement data stored in each of the temporary storage units simultaneously with the broadcast command, Lt; / RTI >
Wherein the storage unit of the master classifies and stores the measurement data received for each time identifier by time.
8. The method of claim 7,
In the third step, when it is determined that the measurement data transmission in the slave having the previous ID is not completed within a predetermined time, the determination unit may transmit the communication error data and the measurement data stored in the temporary storage unit to the master A method for adjusting a sensor-to-sensor sink.
In a motion analysis system using a sensor,
An inter-sensor sink adjustment network according to any one of claims 1 to 5;
A receiving unit receiving a group of measurement data stored for each time identifier in a master of the sink control network;
A motion detector for calculating motion information data based on the measurement data group received by the receiving unit; And
And a motion analyzer for analyzing the motion and posture based on the motion information data. The motion analysis system using the inter-sensor sync control wireless network.
10. The method of claim 9,
Wherein the sensor unit of each of the plurality of slaves of the sink control network is at least one of a joint sensor, an acceleration sensor, an angular velocity sensor, and a gyro sensor mounted on the body,
Wherein the motion recognition unit receives the data measured by the joint sensor, the acceleration sensor, the angular velocity sensor, and the gyro sensor to calculate the motion information data.

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