KR101299681B1 - Using sensor networks for remote terminal apparatus and method for detecting abnormal status - Google Patents

Abstract

The present invention relates to an apparatus and method for detecting an abnormal state of a remote terminal using a sensor network, wherein the sensor network for detecting disconnection and disconnection is formed by the routing device 20 and the coordinator module 30 of the sensor function. Status information including normal, disconnection, and failure of the end device 10 and the routing module 20 of the sensor network is transmitted to the coordinator module 30 at a predetermined time interval, so that the end device 10 and the routing module for a predetermined time period. If there is no signal input from the coordinator module 30 in the coordinator module 30 to the routing module 20, the end device 10, the connection check (PING) to the address allocated dynamically to the coordinator module 30 router table when there is no response While recording in the fault state, the coordinator module 30 sets up the state information router table of each routing module 20 and the end device 10 collected. The abnormal state detected in the apparatus and method of the remote terminal on a packet-by-packet basis and transmits it to the server (60) using a sensor network to check for abnormalities.

Description

Using sensor networks for remote terminal apparatus and method for detecting abnormal status}

The present invention is to check the abnormal state of the power line disconnection and power failure, an apparatus and method for detecting an abnormal state of the remote terminal using a sensor network that can quickly and efficiently handle the error of bad weather and equipment replacement and failure It is about.

Recently, due to the improvement of communication technology and the performance of electronic devices, technologies that collectively manage remotely distributed various devices are widely used. Examples include street lamps, water meters, and electricity meters installed near farmland in rural areas. Etc.

As such, it is most important to find out whether the terminals of the remote terminal are abnormal, that is, whether they are broken or disconnected.In this case, it is necessary to take immediate measures to prevent the user of the remote terminal from being corrected. Accurate charging is possible through metering.

For this purpose, the conventional remote control method uses a VHF method, a CDMA / PCS method or a leased line. Among them, the VHF method has a cumbersome problem of additional installation, license acquisition and permission for a radio wave-constrained area, and CDMA / PCS. In the case of the method, there were problems such as excessive initial cost, monthly fee payment, limitation of data management, and additional cost when interlocking. In case of using a leased line, excessive initial cost occurred.

Moreover, in such a conventional remote control method, a plurality of remote terminals are directly managed by one server, or in some cases, remote terminals are divided into groups to locate control terminals for each group and remote terminal information collected by such control terminals. However, when a single server is used and a large number of remote terminals exist, the network traffic is increased because several remote terminals are connected to the server at the same time. In the case of managing in a group, when a failure occurs in the control terminal of the group, there is a problem in that it is impossible to control all the remote terminals in the group.

In order to solve the above problems, an object of the present invention is to use a sensor network and to limit the amount of one-time data transmission to reduce the packet amount and to accurately monitor the disconnection and power failure of the remote terminal. .

Features of the present invention for achieving the above object, the end device 10 as a sensor function to detect whether disconnection or disconnection and periodically output a signal according to the end device, the router according to the input operation control signal The routing module 20, which plays a role, records the address of the routing module 20 and the end device 10 and the fault status information of the disconnection and power failure in the router table based on the signal transmitted from the routing module 20. A sensor network 40 including a coordinator module 30 for transmitting the information recorded in the router table at a predetermined time interval with a predetermined packet amount; Detecting an abnormal state of the remote terminal using the sensor network, characterized in that it comprises a; server (60) for determining whether the failure based on the signal transmitted from the coordinator module 30 constituting the sensor network (40) Is in the device.

In the server 60, the location information of the devices constituting the sensor network 40 is recorded, and the terminal device 10, the routing module 20, or the coordinator module 30, and the person in charge of the short distance that are determined to be faulty ( 50) outputs a signal informing of disconnection and disconnection of the corresponding device.

In addition, another feature of the present invention comprises the steps of forming a sensor network for detecting disconnection and disconnection with the sensor device end device 10 routing module 20 and the coordinator module 30; Status information including normal, disconnection, and failure of the end device 10 and the routing module 20 of the sensor network is transmitted to the coordinator module 30 at a predetermined time interval to route the end device 10 and the routing for a predetermined time. When there is no signal input from the module 20, the coordinator module 30 connects to the routing module 20 and the end device 10 with a dynamically allocated address. The coordinator module 30 transmits the collected state information router table of each routing module 20 and the end device 10 to the server 60 in a predetermined packet unit while recording in a fault state. An abnormal state detection method of a remote terminal using a sensor network, characterized in that.

According to the present invention described above, it is possible to accurately and easily check the failure and abnormal conditions, such as disconnection and disconnection of a plurality of terminals distributed in a remote location, and to notify the person in charge of the shortest distance by using the location information to quickly There is an effect that action can be taken.

In addition, by constructing sensor network using sensor network using Zigbee communication, it is stable in low power, does not receive poor reception, and transmits abnormal status table with constant packet length by regular unit of time. As a result, it is economical in terms of cost, and it is easy to manage the server.

In addition, since the sensor network is formed in consideration of the climate environment, there is an effect that the reception failure due to climate change does not occur.

1 is a view showing an abnormal state detection device of a remote terminal using a sensor network of the present invention
2 is a diagram showing a configuration of an end device of the present invention.
3 and 4 are diagrams showing a router table of a server
5 is a diagram showing the configuration of the sensor network of the present invention.
6 is a diagram showing a router table of the coordinator module of the present invention.
7 is a view showing a countermeasure process when a routing module fails in the present invention.
8 and 9 are views illustrating a sensor network configuration due to bad weather
10 is a view showing an abnormal state detection apparatus of a remote terminal using a sensor network of the present invention based on location information
11 illustrates a hierarchical structure of servers.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, an apparatus for detecting an abnormal state of a remote terminal using a sensor network according to the present invention includes an end device 10 serving as a sensor and a routing module serving as the end device or a router according to an input operation control signal. (20) records the address of the routing module 20 and the end device 10 and the fault status information of the disconnection and power failure together in the table on the basis of the signal transmitted from the routing module 20, and the constant packet quantity A sensor network 40 including a coordinator module 30 for transmitting the information recorded in the table at time intervals; A person in charge of the corresponding end device 10, the routing module 20 or the coordinator module 30 by determining whether or not a failure based on the signal transmitted from the coordinator module 30 constituting the sensor network 40 ( And a server 60 for outputting a signal corresponding to disconnection and disconnection.

In the above, the sensor network 40 uses Zigbee communication.

The end device 10 has a sensor function of periodically detecting a disconnection or a disconnection and outputting a signal accordingly, and as shown in FIG. 2, a converter 14 for converting the AC power supply 12 into a DC power supply; It is composed of a wireless module 16 that performs a wireless transmission and reception function to convert AC 220V to DC 3V, the converted 3V voltage is applied to the wireless module GPIO can be confirmed as HI signal. If the AC 220V supplied from the external device is disconnected, it can be determined that the DC 3V power supply is disconnected because the voltage is not applied to the wireless module GPIO.

In addition, monitoring the voltage across the INPUT GPIO at the end device 10 detects the polling method. It detects whether the GPIO is HI or LOW with 1 second polling to generate sensor network communication. Normal, disconnection or failure status information on the generated sensing information (0. normal, 1. disconnection, 2. failure) is periodically transmitted to the coordinator module 30 through the routing module 20 to the coordinator module 30 Is updated in the memory table.

The end device 10 is optimized for low power and is a reduced function device capable of communicating only with a parent node.

The routing module 20 is a full function device that operates as an end device or a router according to an input control signal, and performs an end device function and a router function. The routing module 20 performs signal processing and an end of another routing module 20. The device 10 transmits a signal to the coordinator module 30. In an embodiment of the present invention, the routing module 20 transmits the status information to the coordinator module 30 in units of 1 second.

In the above, the routing function refers to having a routing table for neighboring routing modules and a role of connecting / disconnecting end devices to a network in a sensor network such as a mesh or a tree network.

By adding such a routing module 20 to the sensor network, the network range can be widened.

The coordinator module 30 is a full function device as a final processing device of the sensor network, and records the address and status information of the end device 10 and the routing module 20 on the basis of a signal output from the routing module 20. And, if there is no signal input of the end device 10 and the routing module 20 for a predetermined time or more, it records as a failure, and transmits the recorded data table through the wireless Internet (WCDMA, CDMA, WLAN) in a certain packet amount There is only one on the network to initialize the network and set the PAN ID, Channel, Stack, etc.

In the present invention, the coordinator module 30 is the routing module 20 and the end device 10 in the coordinator module 30 when there is no more than 5 seconds report from the routing module 20 to the coordinator module 30. It checks the connection to the dynamically allocated address and troubleshoots the table when there is no response.

And, in the above, the coordinator module 30 transmits a table in units of 10 seconds if any abnormal signal such as disconnection occurs, and transmits the data to the wireless Internet environment in units of 10 minutes when each router state information is normal. It can reduce the cost and increase the speed and reliability of the data.

In addition, the server 60 determines whether a failure is based on a signal transmitted from the coordinator module 30, and a person in charge terminal 50 of the corresponding end device 10, the routing module 20, or the coordinator module 30. Outputs the signal corresponding to disconnection and disconnection.

In addition, the server 60 is recorded with the location of the various devices constituting the sensor network together with the GIS information so that when the failure occurs, the corresponding terminal 50 can accurately display the location of the corresponding failure device using map information. do.

To this end, as shown in FIG. 3, the router table of the server stores the unique addresses of the devices constituting the sensor network 40 and the latitude, longitude, and state, which are installation positions of the corresponding devices, so that the location and state can be distinguished. . In addition, this table is configured as simple as possible to have a fast response to the query. The default value of the table for status is set to 0. When the sensor operates, it updates the value received from the sensor.

Once the router table is registered, the router table is accumulated without being erased, and the telegraph pole table is separated as shown in FIG. The separated table creates a view table for reading.

In addition, the location information of the corresponding person terminal 50 is also recorded in the server 60, and if there is a device having a failure, the location and state of the corresponding device of the fault device can be transmitted to the person with the shortest distance from the device. To help.

At this time, the person in charge of the terminal notifies using wireless communication (SNS, SMS, MMS).

In addition, when the person in charge of the device 50 transmits the location information as described above, when the person in charge of the device inputs the location information of the new device when an arbitrary device is installed, the server 60 receives it and records it in the database. . To this end, the person in charge of the terminal is using a smartphone, the application is installed to update and modify the MAC address, longitude, latitude by accessing the database directly.

An embodiment of the disconnection and disconnection detection method using such a system will be described.

First, a sensor network is formed between the end device 10, the routing module 20, and the coordinator module 30 by broadcasting. They follow the IEEE 802.15.4 standard. The IEEE 802.15.4 standard is a simple packet data protocol for a simple wireless network.

1.250kbps data rate

2.star or peer to peer topology

3. Support low latency devices

4. CSMA-CA Channel Access

5. Dynamic device addressing

6. Fully handshaked protocol for transport reliability

7. Low power consumption

8. 16 channels (2.4GHz), 10 channels (915Mhz), 1 channel (868MHz)

9. Very low duty cycle (<0.1%)

It has fast transmission speed, various topologies, reliable transmission protocol, low power consumption (up to 0.2W), various channels, and fast response speed, so it is possible to construct an efficient disconnection management system.

There are two types of devices participating in the IEEE 802.15.4 network: full function device (FFD) and reduced function device (RFD). The FFD device may participate in the network as the coordinator module 30 and the routing module 20, and the RFD device may participate in only one network as the end device 10, and only a limited form of star topology may exist. It cannot be the coordinator module 30, only the parent router can communicate.

The network structure to be implemented in this network formation process is shown in FIG. 3. The network of the present invention is an extension of the mesh topology, and even when one routing module 20 fails, the network may transmit a signal to the coordinator module 30 via the other routing module 20. This is possible because the radio module has a very low duty cycle. Due to the low duty cycle, the network overload should be limited to 100 routing modules 20 in one network.

If less than 100 routing modules 20 exist in one coordinator module 30, the routing module 20 may be added at any time, and if the routing module 20 is added, the routing module 20 is immediately added to the coordinator module 30. Paired, the coordinator module 30 is configured by adding a router table. On the contrary, when one routing module 20 is removed, the removed router information is deleted from the data table.

When more than 100 routing modules 20 of the network are separated, the network is separated using the end device 10 as shown in FIG. 5. In order to avoid network overlap, the network group-specific coordinator module 30 may separate network groups by using different channels and setting the end device 10 as a channel suitable for the network group.

On the other hand, after the sensor network is formed, the state information (0. normal, 1. disconnection, 2. failure) of the end device 10 and the routing module 20 is periodically transmitted to the coordinator module 30, the coordinator As shown in FIG. 6, the module 30 constitutes a serial number and a state information table of each routing module 20 and the end device 10.

Status information transmission from the routing module 20 to the coordinator module 30 is made in 1 second unit, the coordinator module 30 at the coordinator module 30 when there is no more than 5 seconds report from the routing module 20 to the coordinator module 30 The routing module 20 checks the connection to the dynamically allocated address to the end device 10 and processes the table when there is no response.

The coordinator module 30 transmits the collected state information table of each routing module 20 and the end device 10 to the wireless Internet environment (WCDMA, CDMA, WLAN). The transmission cycle transmits the table to the wireless Internet environment (WCDMA, CDMA, WLAN) every 10 seconds when any abnormal signal such as disconnection occurs. When the status information of each of the routing module 20 and the end device 10 is normal, the data transmission amount can be reduced by transmitting to the wireless Internet environment every 10 minutes, and the speed and reliability of the data can be increased.

In the above, the coordinator module 30 has the addresses and states of the routing module 20 and the end device 10 as a table, and cuts 10 of them and transmits them to the AT command COMMAMD. This transmission can reduce the amount of data and reduce the amount of packets being transmitted, so that accurate state information of the routing module 20 and the end device 10 can be efficiently determined.

In addition, the network module can be designed as desired by checking the connected configuration of the network so that the routing module 20 acting as an FFD can act as an end device 10 by giving a switching command from the coordinator module 30.

If any of the routing module 20 or the end device 10 has failed during failure detection such as disconnection and power failure as described above, the server 60 may fail the routing module 20 or the end device ( 10) by sending the position and status information, so that the person in charge to replace the routing module 20 forming the two paths, as shown in Figure 7, the server 60 to the three paths through the wireless Internet environment The coordinator module 30 is reset to update the routing module 20 and the end device 10 information table in the coordinator module 30.

On the other hand, as shown in FIG. 8, the reception radius and the reception radius during bad weather are different, so that one routing module 20 may be excluded from the network. When the routing module 20 to be disconnected occurs, the routing module 20 in question is replaced with the coordinator module 30, and the router information table is rebuilt by resetting the coordinator module 30 previously connected. 9 is a view in which the routing module 20 is replaced with the coordinator module 30, and the coordinator modules 1 and 2 have different channels, so that the collision module 20 is designed to avoid collision between the coordinator module 30 on a clear day.

If any device fails during disconnection and power failure monitoring, as shown in FIG. 10, the server 60 transmits the location and status information of the corresponding device to the person in charge 50 closest to the corresponding device. . In this process, even when a failure occurs, the terminal 70 of the manager connected to the server 60 displays the state of the corresponding device by using a map.

On the other hand, the server 60 is a regional management server 62 for managing a plurality of regions in a hierarchical structure as shown in FIG. 11 in consideration of traffic and the main server 64 for managing these regional management servers 62. It may be formed by dividing.

10: end device 20: routing module
30: coordinator module 40: sensor network
60: server

Claims (5)

An end device 10 which functions as a sensor for detecting disconnection or disconnection and periodically outputs a signal according thereto, a routing module 20 serving as the end device or a router according to an input operation control signal, and the routing module ( Based on the signal transmitted from 20), the address of the routing module 20 and the end device 10, and the fault status information of the disconnection and power failure are recorded together in the router table, and are recorded in the router table at regular time intervals with a certain packet amount. A sensor network 40 including a coordinator module 30 for transmitting information;
And a server 60 determining whether a failure is based on a signal transmitted from the coordinator module 30 constituting the sensor network 40.
The server 60 records the location information of the devices constituting the sensor network 40, and determines an end device 10, the routing module 20, or the coordinator module 30, and the person in charge of the local area 50 that are determined to be faulty. Abnormal state detection device of a remote terminal using a sensor network, characterized in that for outputting a signal for notifying the disconnection and disconnection of the device. delete Forming a sensor network for disconnection and disconnection detection with the end device 10 of the sensor function, the routing module 20 and the coordinator module 30;
Status information including normal, disconnection, and failure of the end device 10 and the routing module 20 of the sensor network is transmitted to the coordinator module 30 at a predetermined time interval to route the end device 10 and the routing for a predetermined time. When there is no signal input from the module 20, the coordinator module 30 connects to the routing module 20 and the end device 10 with a dynamically allocated address. The coordinator module 30 transmits the collected state information router table of each routing module 20 and the end device 10 to the server 60 in a predetermined packet unit while recording in a fault state.
Abnormal state detection method of a remote terminal using a sensor network comprising a. The abnormal state of the remote terminal using the sensor network according to claim 3, wherein the transmission period from the coordinator module 30 to the server 60 is shorter when a failure occurs than when there is no failure. Detection method. The method of claim 3, wherein the coordinator module 30 gives a switching command to operate the routing module 20, which serves as an FFD, as an end device 10. .

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