KR20070089467A - A wireless system for monitoring of manhole - Google Patents

Abstract

A wireless system for monitoring a manhole is provided to remotely monitor the state of the manhole by collecting sensing information about the manhole through a collecting terminal, collecting and classifying plural manhole sensing information through a relay terminal, and then transmitting the manhole sensing information to a server through a CDMA(Code Division Multiple Access) module by wireless communication. A wireless system for monitoring a manhole is composed of a terminal unit equipped with at least one of an opening and closing sensor, a water level sensor, and a temperature sensor, to detect the internal state of the manhole by using the sensor; plural collecting terminals(10) collecting sensing information of the manhole detected by the sensor from the terminal unit and having a wireless communication module; a relay terminal(20) collecting and classifying plural manhole sensing information received from plural manhole sensing information and transmitting the manhole sensing information to a server(30) through the communication module by wireless communication; and the server receiving plural manhole sensing information from the relay terminal by wireless communication by using the communication module and displaying the present state of plural manholes in real time by using the received sensing information.

Description

A wireless system for monitoring of manhole

1 is a block diagram of a radio system for manhole monitoring according to the present invention.

2 is a block diagram of a collecting terminal of a wireless system for manhole monitoring according to the present invention;

3 is a block diagram of a relay terminal of a wireless system for manhole monitoring according to the present invention;

4 is a block diagram of a server of the manhole monitoring wireless system according to the present invention.

-Explanation of symbols for the main parts of the drawings-

2: open / close sensor 4: temperature sensor

6: water level sensor 8: power sensor

10: collecting terminal 20: relay terminal

30: server

The present invention relates to a system for monitoring the temperature, water level, and whether the lid is opened or closed inside the manhole, and more specifically, by using a sensor installed inside the manhole to grasp the current state of the manhole and wirelessly transmits it to the outside. The present invention relates to a manhole monitoring wireless system that enables remote management of the internal state of a manhole in real time.

In general, electric power facilities in urban areas are gradually becoming underground due to urban aesthetics, safety, and high-rise buildings, and their weight is increasing day by day.

However, research and development is underway in the joint districts where underground lines are installed along with other facilities, but manholes, etc., still have to rely on manpower because the environment is poor and access for identification or instantaneous access is not easy. Because.

Therefore, the manhole has a feature that can not be immediately identified in case of emergency, such as intrusion or accident of outsiders.

Therefore, in order to overcome these difficulties and to easily manage the manhole at a remote location, a sensor is installed in the manhole to obtain the necessary information, and a remote alarm system of the manhole is provided so that the information detected by the sensor can be delivered to a point of interest. Development of a system that can easily check the current detection information of the manhole and manhole is essential.

The prior art related to the system that can easily check the event content of the manhole as shown in the manhole state monitoring system of the Republic of Korea Patent Publication No. 10-0545911.

The technology shown in the Republic of Korea Patent Publication No. 10-0545911

In the manhole state monitoring system for installing a remote monitoring terminal for monitoring the state inside the manhole in the manhole to receive the state information detected by the remote monitoring terminal from the center server to manage the manhole,

A communication network power extracting unit which connects to a communication network already built in the manhole and extracts electric power from current flowing through the communication network;

A power stabilization unit for stabilizing the power obtained by the communication network power extraction unit to a voltage that can be used by the remote monitoring terminal and providing the power to the remote monitoring terminal;

A sensor unit comprising a plurality of sensors for detecting a state inside the manhole for security, monitoring, and management of the manhole;

And a central processing unit for transmitting the sensed value of the sensor unit to the center server and receiving a command from the center server to drive the sensor unit.

The conventional technology is to provide a remote monitoring terminal for monitoring the state of the manhole, which is widely scattered, and is supplied with power from a built-in PSTN network and a communication line also uses a built-in communication network, thereby minimizing system construction cost. The real-time monitoring and management of the manhole was possible, and when an abnormality occurred in the communication manhole, there was an advantage in that it was possible to quickly identify and process the accident history, but there were the following problems.

The conventional technology has a inconvenience of having to secure a PSTN network in operating a manhole monitoring system by establishing a wired line using a PSTN network, which is a dedicated communication network of KT, and can remotely manage the current state of the manhole wirelessly. There was no problem.

The present invention is proposed to solve the above conventional problems,

First, the present invention, apart from detecting and managing the internal state of the manhole by wire as in the conventional PSTN network, transmits and receives the manhole detection information by wireless communication between the collecting terminal collecting the sensor's manhole detection information and the server and the relay terminal. The purpose is to make it possible.

Secondly, since the server, the relay terminal and the collection terminal wirelessly communicates in real time, an object of the server is to enable the administrator of the server to check the normal operation state of the manhole and the normal operation of the communication device in real time.

Third, the purpose of the collective management of the manhole in the surrounding area by using a relay terminal installed in a certain area.

Fourth, the purpose of preventing the inoperable state of the collecting terminal due to the discharge of the battery by notifying the administrator when the battery is discharged.

Fifth, the relay terminal is intended to be not limited to the installation site by using a solar cell and using a CDMA communication network.

Sixth, the object of the present invention is to improve the waterproof and dustproof performance of the collection terminal installed inside the manhole.

A terminal unit equipped with at least one sensor of an opening / closing sensor, a water level sensor, and a temperature sensor according to the present invention for achieving the above object, and detecting an internal state of the manhole using the sensor;

A plurality of collecting terminals including a wireless communication module for collecting sensing information of a manhole detected by a sensor from the terminal unit and transmitting the collected sensing information to a relay terminal using an antenna;

A relay terminal for collecting and arranging detection information of a plurality of manholes received from the plurality of collection terminals, and wirelessly transmitting the detected information of the collected and arranged manholes to a server using a communication module; And

And a server configured to wirelessly receive the sensing information of the plurality of manholes from the relay terminal using a communication module, and to express the current state of the plurality of manholes in real time using the received sensing information.

Hereinafter, with reference to the accompanying drawings to describe the specific configuration and operation of the present invention.

1 is a block diagram of a manhole monitoring wireless system according to the present invention, [2] is a block diagram of a manhole monitoring collection terminal according to the present invention, [Figure 3] is a manhole monitoring according to the present invention 4 is a block diagram of a relay terminal, and FIG. 4 is a block diagram of a manhole monitoring server according to the present invention.

As shown in Fig. 1 to Fig. 4, the manhole monitoring wireless system according to the present invention (hereinafter referred to as "system" in the detailed description of the invention) is basically an opening and closing sensor (2), water level sensor (4), the collection terminal 10 including the temperature sensor 6 and the terminal unit, and the components such as the relay terminal 20 and the server 30 is provided.

Configurations other than those described above may also be added, but parts unnecessary for the description of the present invention will be omitted.

The above components will be described in more detail as follows.

The collection terminal 10 is

A terminal unit equipped with at least one sensor of the opening / closing sensor 2, the water level sensor 4, and the temperature sensor 6, and detecting an internal state of the manhole using the sensor;

And a wireless communication module 14 for collecting sensing information of the manhole detected by the sensor from the terminal unit and transmitting the collected sensing information to the relay terminal 20 using the antenna 13.

Here, the open / close sensor 2 detects whether the manhole is opened or closed, and is fixed to the manhole body by a lever-type limit switch, and the roller lever is installed in a form in which the manhole cover is pressed. When the manhole cover is opened, the lever returns to the position of the switch. It consists of the structure that the contact is operated.

In addition, the opening and closing oath 2 is made of a solid case of die casting to absorb external shocks, the built-in switch of the opening and closing sensor is composed of a two-stage double-stage basic switch, made of heat-resistant phenol (phenol) material.

The opening and closing sensor 2 configured as described above is a solid structure of oil, heat, and dustproof, and particularly has excellent mechanical strength.

In addition, the set position indicator is attached to prevent over-operation and long life of the lever.

And the water level sensor (4) is to detect the water level inside the manhole, it is made of an ottoman type level switch, installed in the lower part of the manhole when the flooded sensor stretched down to the buoyancy while the internal switch contact operates do.

The water level sensor 4 is preferably made of a synthetic resin, and is made of a structure resistant to corrosion.

In addition, the water level sensor 4 is a tact switch inside the float switch (tact) has a feature that is robust compared to the conventional mercury switch.

The temperature sensor 6 is for sensing a temperature inside the manhole, and in general, the temperature sensor uses a TGA130B, which is a diode thermister whose resistance value changes with temperature.

However, the temperature sensor 6 according to the present invention employs a model name STH10 of Swiss SENSIRION, which is a digital temperature sensor rather than a conventional analog method, in order to improve current consumption, straightness and precision.

Therefore, the temperature sensor 6 according to the present invention is precise and consumes very little power and can measure relative humidity.

And the collection terminal 10 includes a low power control unit 11 for collecting the state information generated in the sensor, and to control the sensors with a small current; And

It further comprises a microcontroller 12 for wirelessly communicating with the relay terminal 20 using the antenna 13 and the wireless communication module 14 for wirelessly transmitting the state information generated by the sensor from the low power control unit 11. .

Due to the configuration as described above, the collection terminal 10 collects various types of sensing information generated in the manhole using the sensor, and immediately plays a role of wirelessly transmitting a small output to the relay terminal 20 to which the collecting terminal 10 belongs.

That is, the collection terminal 10 is input to the microcontroller 12 through the low power control unit 11 for controlling the sensing information generated by each sensor with a small current, the microcontroller 12 is the content In summary, the wireless communication module (RF module) 14 and the antenna 13 are transmitted to the relay terminal 20.

The battery 17 is built in the terminal unit of the collecting terminal 10 to supply power necessary for the sensor, and to supply the necessary power to each block of the collecting terminal 10.

Here, further comprising a power sensor (8) to determine whether the battery is discharged, the collection terminal 10 due to the discharge of the battery 17 by notifying the manager when the battery 17 of the collection terminal 10 is discharged ) Can prevent the inoperable state.

Here, the detection information of the manhole is a unique number of the manhole, the temperature value inside the manhole detected by the temperature sensor, the water level value inside the manhole detected by the water level sensor, and whether the manhole cover detected by the open / close sensor It includes.

When the collection terminal is described in more detail for the configuration of collecting the state of the sensor, the microcontroller 12 checks the enveloping and level sensor in a period of 1/1000 seconds once per second, power sensor once per minute Use to check the remaining battery capacity (preferably 2.7V or less will be sent immediately to the relay terminal).

In addition, it reads the temperature data once every 10 seconds from the temperature sensor, and transmits the operation status to the relay terminal as soon as the switchgear and the water level sensor operate.

In addition, if the temperature is more than 60 degrees, it is immediately transmitted to the relay terminal, and if more than 5 degrees change in 10 seconds to the relay terminal.

Lastly, if no operation occurs within 24 hours, it automatically transmits its current status to the relay terminal.

Here, the collection terminal 10 is first equipped with sensors inside the manhole, and is equipped with a terminal unit including a battery for supplying power to the sensor, and all the circuit configuration connected to the sensor and the cable to control the sensor ( Antennas) are all built in the housing of the collecting terminal 10 which is underground embedded around the manhole.

Therefore, the housing of the collecting terminal is made of acetal resin cover on the bottom plate of stainless steel, so it is durable without any damage to the compressive load of 21 TON and does not penetrate moisture even if it is locked for 30 minutes at a depth of 1 meter. It is configured to protect the internal circuit even if the manhole is flooded in rainy weather.

The microcontroller 12 preferably uses ATmega16, which is a low power CMOS 8-bit microcontroller 12 based on the AVR RISC structure.

Therefore, the ATmega16 can execute the instruction within one clock cycle and can achieve a processing speed of 1 MIPS / MHz, thereby optimizing power consumption.

Here, the wireless communication module 14 for wireless communication between the collection terminal 10 and the relay terminal 20 is preferably designed using the model name CC1020 of CHIPCON Co., Ltd., the basics of the wireless transmitting and receiving device, ATMEGA16 microcontroller model of ATMEL Co., Ltd. The control firmware will be implemented.

In addition, the wireless communication module 14 preferably uses an unlicensed communication method using a frequency of the RF 424Mhz band.

The relay terminal 20 which communicates wirelessly using the collection terminal 10 and the wireless communication module 14 collects and organizes sensing information of a plurality of manholes received from the plurality of collection terminals 10, and collects and organizes them. It is provided with a predetermined area for transmitting the detected information of the manhole to the server 30 wirelessly using a communication module, preferably a CDMA module.

The relay terminal 20 is preferably designed to manage 250 collection terminals per unit.

Referring to the components of the relay terminal 20 in more detail, the relay terminal

An antenna (13) for receiving state information of a sensor received in the form of a radio signal from the collection terminal (10);

A wireless communication module 14 and a microcontroller 12 for converting the radio wave signal of the event signal into data;

A CDMA module 31 connected to the microcontroller 12 through a connecting means and wirelessly communicating with a CDMA module 22 of a server using a CDMA antenna 26; And

It includes a power supply for supplying power to each of the components.

That is, the radio wave signal received through the antenna 21 of the relay terminal 20 becomes data in the wireless communication module (RF module) 22 and the microcontroller 1 (23-1).

The data is immediately transferred to the microcontroller 2 (23-2) and its contents are again connected to the server (30) via the CDMA public telecommunication network using a CDMA module (25) and an antenna (26) via connecting means, i.e., RS232. do.

The microcontroller 1 23-1 controls the wireless communication module 22 and the microcontroller 2 23-2 controls the CDMA module 25.

The reason for using the multi-CPU as described above is to increase the reliability of data transmission.

And all incoming data is processed as interrupt, so the order of processing is decided by priority.

However, in the case of the relay terminal 20, the priority of either of them may not be yielded, so each of them is processed by using a separate microcontroller and connected to each other in parallel handshake communication.

The CDMA module 25 uses the model name BSM-800 / 850 of BELLWAVE. The CDMA module 25 is connected by dialing using a CDMA public telecommunication network and transmits data using an AT command like a general module.

Here, the power supply unit for driving the relay terminal 20

A solar cell 27 for converting solar energy into electrical energy,

A power supply control unit 28 receiving electric energy from the solar cell 27 and charging the battery 29; And

It includes a battery 29 for supplying power to each block of the device by the power charged by the power control unit 28.

In the case of the solar cell 27, since the relay terminal 20 is installed on a telephone pole or a roof of a building which is not easily connected to a phase power source, self-generation is required.

Therefore, the power supply unit of the present invention preferably solved the power supply using an Amorphous solar cell.

The relay terminal 20 configured as described above may be operated without a collision between the collection terminal 10 communication and the server 30 communication by adopting a multiprocessor, and employing a solar cell, a CDMA module, and an antenna for an installation place. There is no limit.

Therefore, it is possible to secure excellent communication relay function because it is installed at the position of the most optimal radio wave transmission condition.

In addition, PIFA (Planer Inverting F Antenna) antenna is adopted to enhance the reliability of communication which is the life of the relay device.

Here, the relay terminal periodically reports its status and the status of the collecting terminal to the server. If communication is not made within 24 hours from the collecting terminal, the relay terminal reports the failure of the collecting terminal to the server, and detects nothing from the collecting terminal. Even if the information is not transmitted, it transmits its time information to the server once every 24 hours, thereby confirming that the relay terminal is normal.

In addition, the server receives time information from a server to be described later and performs a function of correcting its own time.

In addition, when receiving a collection command from the server reports the final communication with the collection terminal to the server.

In addition, the server 30 and the server 30 for wireless communication using the CDMA module 31 is

A CDMA module 31 for receiving sensing information of the manhole from the relay terminal using the CDMA antenna 31;

A storage unit storing sensing information of the manhole received from the CDMA module 31;

A map data storage unit 36 for storing map data for indicating a position of a manhole on the electronic map;

A central control unit 35 for controlling to display the detected information of the manhole by using an electronic map of the map data storage unit 36; And

Alarm means 34 for generating an alarm sound corresponding to the detection information of the manhole.

The relay terminal 20 and the server 30 preferably communicate with each other using the CDMA modules 25 and 31 in the 848 MHz band.

Here, the configuration of the CDMA modules 25 and 31 of the server will be described in more detail. The CDMA module 31 includes an RF transmitter, an RF receiver, and a mode switch, and the RF transmitter is configured to receive data from a transceiver module. The RF receiver is a part that collects and transmits the acknowledgment about the signal wirelessly, and collects data from the transceiver module, processes the collected data, and transmits the data to the CDMA interface.

The mode switching unit is used to switch from a reception mode to a transmission mode and to switch from a transmission mode to a reception mode for RF transmission / reception.

 Due to the above configuration, the central control unit 35 expresses the detection information of the manhole received from the relay terminal using the display unit 37 such as a monitor, and generates an alarm sound using the alarm means 34. Will be.

Here, the display unit 37 may display the current location of the unique number of the manhole using the electronic map of the map data storage unit 36.

In this case, when the central control unit 35 emits an alarm sound using the alarm means 34, when receiving the detection information of the collection terminal 10 from the relay terminal 20, the manager detects the position and the detection according to the unique number of the manhole. It transmits and displays the information and generates an alarm sound.

In addition, the storage unit 33 stores the detected information on each of the received manholes and manages the history. If communication is interrupted within 24 hours from the relay terminal 20, the relay terminal 20 is recognized as a failure. Alerts the server administrator.

In addition, if the time data transmitted from the relay terminal 20 is more than 5 minutes, a time correction command is given to the relay terminal.

The operation of the manhole monitoring wireless system according to the present invention configured as described above will be described in more detail.

First, the open / close sensor 2, the temperature sensor 4, and the water level sensor 6 connected to the collecting terminal 10 are collected by the collecting terminal 10 detected by the lid opening / closing of the manhole, temperature and water level, and the power sensor 8. ) To collect the detection information including whether the battery (17) built in the discharge.

The sensing information is collected by the collecting terminal 10 and transmitted to the relay terminal 20 by the wireless communication module 14 and the antenna 15 of the collecting terminal 10.

Accordingly, the relay terminal 20 collects and organizes the sensing information of the manhole received from the collection terminal 10 and uses the CDMA module 25 and the CDMA antenna 26 to form the server 30 through the CDMA communication network. The sensing information of the manhole is transmitted.

The server receiving the manhole detection information from the relay terminal 20 using the CDMA module displays the detection information of the manhole in real time using a display means such as a monitor, so that the current state and the normal state of each manhole are displayed. You can tell the administrator in real time whether the operation.

Herein, the communication module for performing wireless communication between the relay terminal 20 and the server 30 may use the CDMA module and the CDMA antenna as well as all other means capable of wireless communication.

According to the present invention by the above configuration,

First, the present invention is to escape from detecting the internal state of the manhole by a wire, such as a conventional PSTN network,

The collecting terminal collects the sensing information of the manhole detected by the sensor, transmits the collected sensing information to the relay terminal by using the antenna, and the relay terminal collects and organizes the sensing information of the plurality of manholes received from the collecting terminal. In addition, it is possible to remotely monitor the state of the manhole more conveniently by implementing a manhole monitoring system wirelessly, such as transmitting the collected and arranged manhole detection information to the server wirelessly using a CDMA module.

Second, since the server, the relay terminal and the collection terminal wirelessly communicates in real time, the administrator of the server can check the normal operation state of the manhole and the normal operation of the communication device in real time.

Third, it is possible to collectively manage the manhole in the surrounding area by using a relay terminal installed in a certain area.

Fourth, when the battery of the collecting terminal is discharged to notify the administrator has an effect that can prevent the inoperable state of the collecting terminal due to the discharge of the battery.

Fifth, since the relay terminal is implemented using a solar cell and a CDMA communication network, the relay terminal can be freely installed regardless of the power supply and communication range.

Sixth, the collection terminal is made of acetal resin on the base of the stainless steel has a rigid and waterproof function to protect the internal circuit of the collection terminal even if an excessive load is imposed on the manhole or the manhole is submerged.

Claims (8)

A terminal unit equipped with at least one sensor of an opening / closing sensor, a water level sensor, and a temperature sensor, and detecting an internal state of the manhole using the sensor; A plurality of collecting terminals including a wireless communication module for collecting sensing information of a manhole detected by a sensor from the terminal unit and transmitting the collected sensing information to a relay terminal using an antenna; A relay terminal for collecting and arranging detection information of a plurality of manholes received from the plurality of collection terminals, and wirelessly transmitting the detected information of the collected and arranged manholes to a server using a communication module; And And a server that wirelessly receives sensing information of the plurality of manholes from the relay terminal using a communication module and expresses the current state of the plurality of manholes in real time using the received sensing information. Wireless system. The method of claim 1, The collection terminal A low power control unit for collecting the state information signal generated in the sensor from the terminal unit and controlling the sensors with a micro current; An antenna for wirelessly transmitting the state information signal of the manhole collected from the terminal unit; A microcontroller controlling wireless communication with the relay terminal using the wireless communication module; And Manhole monitoring wireless system comprising a battery for supplying power to each block of the device. The method of claim 1, The relay terminal An antenna for receiving the state information signal of the manhole received from the collection terminal; A wireless communication module and a microcontroller for converting the state information signal of the manhole received by the antenna into data; A communication module connected to the microcontroller through a connecting means and wirelessly communicating with a server using an antenna; And Manhole monitoring wireless system comprising a power supply for supplying power to each of the components. The method of claim 3, The power supply unit Solar cells for converting solar energy into electrical energy; A power control unit which receives electric energy from the solar cell and charges the battery; And And a battery for supplying power to each block of the device with the power charged by the power control unit. The method of claim 1, The server is A communication module for receiving sensing information of the manhole from the relay terminal using an antenna; A storage unit for managing the history by storing the sensing information of the manhole received from the communication module; A map data storage unit for storing map data for displaying a position of a manhole on an electronic map; A central control unit controlling the detected information of the manhole to be displayed by using an electronic map of a map data storage unit; And And a warning means for generating an alarm sound corresponding to the sensing information of the manhole. The method according to any one of claims 1 to 5, The detection information of the manhole is The unique number of the manhole, The temperature value inside the manhole detected by the temperature sensor A water level value inside the manhole detected by the water level sensor, Whether the opening and closing of the manhole cover detected by the opening and closing sensor, Manhole monitoring wireless system, characterized in that made including the discharge of the battery of the collecting terminal. The method of claim 1, The terminal unit further comprises a power sensor for detecting whether the battery is discharged and transmits to the collecting terminal, characterized in that the manhole monitoring wireless system. The method according to any one of claims 1 to 5, The communication module is a wireless system for manhole monitoring, characterized in that the CDMA module.

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