KR100786536B1 - Wireless transmission and reception controller in stager tele-monitoring system - Google Patents

Abstract

The present invention relates to a wireless transmit / receive controller in a chimney remote monitoring system, and more particularly, by transmitting and receiving wirelessly between a control center and a data logger, a chimney remote which is convenient for managing a chimney at a control center and can improve data transmission rate. A wireless transmit / receive controller in a surveillance system.

Wireless transmission and reception controller in the chimney remote monitoring system of the present invention includes a power supply for supplying power to prevent data loss; A memory unit for storing the data; A communication processor for transmitting and receiving the data; A display unit for displaying a transmission / reception status of the data; And a central transmission and reception controller in the chimney remote monitoring system including a central processing unit for controlling the controller, wherein the memory unit is configured so that transmission and reception are not interrupted through automatic booting when an error of the controller itself occurs, and determining whether there is an abnormality of the controller. Self diagnostic unit for; A data logger data receiving unit for sequentially storing the data in a nonvolatile memory; Wireless transmission unit for transmitting the data on the pollutant discharged from the chimney in a packet to the control center; And a controller setting value changing unit for controlling the wireless transmission / reception controller.

Chimney, Remote, Surveillance, System

Description

Wireless transmit / receive controller in chimney remote monitoring system {WIRELESS TRANSMISSION AND RECEPTION CONTROLLER IN STAGER TELE-MONITORING SYSTEM}

1 is a view showing the configuration of a wireless communication network according to an embodiment of the present invention;

2 is a diagram of a communication method between a data logger and a controller;

3 is a diagram of a communication method between a controller and a wireless transmission / reception period;

4 is a diagram of a communication method between a wireless transceiver and a control center;

5 is a diagram illustrating a received data transmission procedure according to an embodiment of the present invention;

6 is a flowchart illustrating a data logger remote control command processing procedure according to an embodiment of the present invention;

7 and 8 are views showing the external structure of the controller according to an embodiment of the present invention,

9 and 10 are views showing the internal structure of the controller according to an embodiment of the present invention,

11 is a view showing a detailed structure of each part according to an embodiment of the present invention.

The present invention relates to a wireless transmit / receive controller in a chimney remote monitoring system, and more particularly, by transmitting and receiving wirelessly between a control center and a data logger, a chimney remote which is convenient for managing a chimney at a control center and can improve data transmission rate. A wireless transmit / receive controller in a surveillance system.
Typically, gas stacks containing pollutants are emitted from workplace chimneys. In the Air Quality Preservation Act, the amount of flue gas is regulated by using the emission allowance standard.As a method of measuring the amount of the discharged gas, until 1996, measurement personnel directly climbed the chimney, put a sensor into the measuring hole, and measured the characteristics of the emission gas. It had to be measured. However, since the measurement of the exhaust gas properties is dangerous and cumbersome, since 1996, an automatic sensor was installed directly inside the chimney, and a method of transmitting data on the emission gas properties obtained from the sensor to the central control center began to be used. It is called a Telemetering System (TMS).

In general, the emission characteristics of telemetry systems installed in a chimney are dust, O2, Co, Nox, Sox, exhaust gas flow rate and exhaust gas temperature. The chimney flue gas profile data is transmitted to the central processing unit as exhaust gas input data.

In general, the telemetry system installed in the chimney is an oxygen sensor for measuring the exhaust gas and the oxygen concentration of the chimney, and an oxygen measurement for analyzing the detected value by amplifying and modifying a unique signal (for example, RS485 communication standard) from the oxygen sensor. Device, a dust sensor for measuring the concentration of pollutants in the flue gas, a dust measuring device for amplifying and modifying a unique signal (for example, RS485 communication standard) from the dust sensor and analyzing the detected value, and the flue gas A sulfur oxide measuring sensor for measuring sulfur oxides, a sulfur oxide measuring device for amplifying and transforming a unique signal (eg, RS485 communication standard) from a sulfur oxide measuring sensor and analyzing the detected value, and nitrogen in the flue gas Amplified and deformed signals are received from the nitrogen oxide measuring sensor and the nitrogen oxide measuring sensor for measuring the oxide. A nitrogen oxide measuring device that analyzes the detected value, a carbon monoxide measuring sensor for measuring carbon monoxide in the flue gas, and a carbon monoxide measuring signal by amplifying and modifying a unique signal (eg, RS485 communication standard) from the carbon monoxide measuring sensor. Measuring device, flow rate sensor for measuring the flow rate of the flue gas, flow rate measuring device for amplifying and transforming a unique signal (for example, RS485 communication standard) from the flow rate sensor and analyzing the detected value, and temperature of the flue gas A temperature sensor for measuring the temperature, a temperature measuring device for receiving an inherent signal (for example, RS485 communication standard) from the temperature sensor, amplifying and modifying the detected value, and analyzing the detected value; Dust measuring device; Sulfur oxide measuring device; Nitrogen oxide measuring device; Carbon monoxide measuring device; Flow measuring device; It consists of a data logger for integrating and transmitting the output of the temperature measuring device.

Therefore, the present invention changes the data transmission and reception method between the chimney automatic measurement control center and the workplace from the conventional wired method to the wireless (CDMA) method, thereby changing the data transmitted from the data logger to a protocol suitable for the wireless method, installation and maintenance It is an object of the present invention to provide a wireless transmit / receive controller in a chimney remote monitoring system that is convenient and can provide efficiency for improving data transmission rate.

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An object of the present invention is a power supply for supplying power to prevent data loss; A memory unit for storing the data; A communication processor for transmitting and receiving the data; A display unit for displaying a transmission / reception status of the data; And a central processing unit for controlling a wireless transmission / reception controller, the wireless transmission / reception controller in the chimney remote monitoring system, wherein the memory unit is configured so that transmission / reception is not interrupted through automatic booting when an error occurs in the wireless transmission / reception controller itself. Self diagnosis unit for determining the abnormality of; A data logger data receiving unit for sequentially storing the data in a nonvolatile memory; Wireless transmission unit for transmitting the data on the pollutant discharged from the chimney in a packet to the control center; And a controller setting value changing unit for controlling the wireless transmission / reception controller.
In addition, the controller of the present invention preferably transmits a control command from the control center to the data logger, and transmits the result processed by the data logger to the control center.
In addition, the self-diagnosis unit of the present invention is preferably configured to determine whether there is an abnormality of the controller by performing a self-diagnosis so that the transmission and reception function is not interrupted through automatic booting when an error occurs using a watch dog timer.
In addition, the data logger data receiving unit of the present invention is preferably configured to store the data received in the non-volatile memory when the power is disconnected to preserve the data.
In addition, the wireless transmission unit of the present invention is configured to measure the wireless network quality value to the data transmitted from the data logger to the control center to monitor the line status, and to record the data transmitted to the log to track remotely This is preferred.
In addition, the controller setting value changing unit of the present invention is preferably configured to change the setting value, and receives the data from the control center to upgrade the controller.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art, although not explicitly described or illustrated herein, can embody the principles of the present invention and invent various devices that fall within the spirit and scope of the present invention. In addition, all conditional terms and embodiments listed herein are in principle clearly intended to be understood solely for the purpose of understanding the concept of the invention and are not to be limited to the specifically listed embodiments and states. do. In addition, it is to be understood that all detailed descriptions, including the principles, aspects, and embodiments of the present invention, as well as listing specific embodiments, are intended to include structural and functional equivalents of these matters. In addition, these equivalents should be understood to include not only equivalents now known, but also equivalents to be developed in the future, that is, all devices invented to perform the same function regardless of structure. Thus, for example, it should be understood that the block diagrams herein represent a conceptual view of example circuitry embodying the principles of the invention. Similarly, all flowcharts, state transitions, pseudocodes, and the like are understood to represent various processes performed by a computer or processor, whether or not the computer or processor is substantially illustrated on a computer readable medium and whether the computer or processor is clearly shown. Should be.

The functionality of the various elements shown in the figures, including functional blocks represented by a processor or similar concept, can be provided by the use of dedicated hardware as well as hardware capable of executing software in association with appropriate software. When provided by a processor, the functionality may be provided by a single dedicated processor, by a single shared processor or by a plurality of individual processors, some of which may be shared. In addition, the explicit use of the terms processor, control or similar terminology should not be interpreted exclusively as a citation of hardware capable of executing software, and is not intended to be used to store digital signal processor (DSP) hardware or software without limitation. It should be understood that it implicitly includes ROM, RAM, and non-volatile memory. Other hardware for the governor may also be included. Similarly, the switches shown in the figures may be presented conceptually only. It is to be understood that the action of such a switch can be performed manually or through the interaction of program control and dedicated logic via program logic or dedicated logic. Specific techniques may be selected by the designer with a more detailed understanding of the specification.

In the claims of this specification, components expressed as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements or firmware / microcode, etc. that perform the functions. It is intended to include all methods of performing a function which are combined with appropriate circuitry for executing the software to perform the function. The invention, as defined by these claims, is equivalent to what is understood from this specification, as any means capable of providing such functionality, as the functionality provided by the various enumerated means are combined, and in any manner required by the claims. It should be understood that.

 The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of a wireless communication network according to an embodiment of the present invention. As shown in the figure, the data logger and the controller must comply with the protocol method according to the standard of the air pollution process test method (revision) without distinction between wired and wireless. 2 is a view for explaining an example of a communication method between a data logger and a controller, for example, using an asynchronous RS232C protocol. On the other hand, the controller and the wireless transceiver (wireless modem) controls the wireless transceiver to receive the data received from the data logger and access the server of the control center and receives the remote command received from the control center. 3 is a view for explaining an example of a wireless transmission and reception period communication scheme with a controller, for example, using an asynchronous RS232C radio protocol. In addition, the wireless transceiver (wireless modem) and the control center exchange data in a TCP / IP (Transmission Control Protocol / Internet Protocol) wireless manner, as shown in FIG.

The controller can be connected and operated regardless of the product of the data logger in accordance with the standard protocol of the Air Pollution Process Test Method (Chapter 3, Section 3, Annex 3, Chimney Automatic Monitoring System Configuration), and the rapid development of wireless communication technology. Therefore, it can be replaced with the latest model when the function of wireless modem is improved.

In addition, the controller is adapted to the TCP / IP packet transmission method for the stability and efficient transmission of data.

In addition, the controller has a data preservation function using its own power supply so that the data being stored is not lost due to a temporary power failure.

The controller also visually displays the operating status of the current controller.

In addition, the controller can expand the storage memory capacity.

In addition, the controller can be installed externally using a cable to increase the transmission and reception sensitivity of the radio wave.

In addition, since the controller is installed at a remote location, the stability of the system is guaranteed. If data transmission is impossible, the cause can be analyzed by storing data and error conditions.

In addition, the controller can manage the status check and operation environment on the menu screen at remote locations such as the control center.

In addition, the controller basically stores 5 minutes and 30 minutes of data and sends it every 30 minutes, and sends it every 5 minutes when the emission concentration reaches a certain level or when an abnormality occurs.

In addition, the controller can enter or modify the basic information (emission concentration, etc.) on the menu screen.

In addition, the controller is stored for more than 5 days 5 days data transmission for the stability of data transmitted by the remote command of the control center.

In addition, the controller receives the remote command from the control center and transmits the command to the data logger to perform the command smoothly.

In addition, the controller uses an efficient transmission method to reduce the communication cost.

In addition, the controller facilitates connection and disconnection with the wireless transceiver when transmission data is generated.

In addition, the controller can temporarily store data that has not been transmitted and retransmit it periodically, using a nonvolatile memory to prevent data loss.

In addition, the controller can manage the status check and operation environment from the remote site such as the control center on the menu screen.

Self-diagnosis part of development software uses Watch Dog Timer to allow automatic booting when the wireless controller itself error occurs.

In addition, the self-diagnosis unit performs self-diagnosis when the system is booted to determine whether there is a problem with the device, and restores or deletes the stored data that does not have an error in communication.

The data logger data receiver of the development software receives 5 and 30 minutes of data from the data logger by the standard protocol and sequentially stores the received data in the internal nonvolatile memory.

In addition, non-volatile memory, that is, data storage memory, of the data logger data receiving unit is allocated at least 1M Byte, and the maximum number of chimneys at one workplace is 12, which can store 5 minutes and 30 minutes of data for at least 1 day.

In addition, the data preservation at the time of power disconnection of the data logger data receiver is stored in the non-volatile memory as soon as the data received from the data logger can be stored even in the event of power failure.

The wireless transmitter of the development software bundles 5 and 30 minutes of data collected every 30 minutes into one packet and transmits it to the control center through the wireless network. However, if data transmission fails due to a line failure, the auto dump function is used to retransmit untransmitted data.

In addition, the wireless transmitter measures the quality of the wireless network at the time of data transmission and includes it in the transmission data, and the control center uses this value to monitor the line status of the workplace.

In addition, in relation to storing the controller operation status log of the wireless transmitter, the controller records all the operational status such as the status of transmitting and receiving measurement data with the data logger and the wireless transmission status to the control station so that it can be tracked later.

The controller setting value changing part of the development software can control the controller by connecting the terminal directly to the console port of the controller in the field and change the setting value by using the menu, or change the setting and control the controller through the wireless network remotely from the control center. have.

In addition, the controller setting value changing unit can be configured with the set values {communication speed of each port, IP address of the control center, service port value of the control center, measuring station code value, number of chimneys, code value of each chimney, measurement items for each chimney, unit, Standard value and standard oxygen setting value, data transmission delay time, automatic SETM function execution time (automatic time alignment), automatic AUTO DUMP execution time, central management site setting (transmission data every 5 minutes), etc. have.

The controller setting value changing unit is a control function that can reboot the system, initialize the wireless modem, delete data, delete logs, and send log information, and download the system's boot and drive programs from the control center through the remote upgrade function. You can upgrade.

FIG. 5 is a diagram illustrating a reception data transmission procedure according to an embodiment of the present invention. As shown in FIG. 5, the control server, the IWF, the wireless controller, and the measurement station data logger are configured in 5 minutes according to the TCP / IP and PPP protocols. Exchange 30 minute data packets.

6 is a flowchart illustrating a data logger remote control command processing procedure according to an embodiment of the present invention. As shown in FIG. 6, when the control server transmits a control command, the wireless controller performs a control command execution completion response with a result code. If the control server transmits a remote command, the wireless controller sends a remote command reception response to the control server while sending a remote command to the measurement station data logger and a response to the remote command execution response back to the control server. The measuring station data logger transmits the data logger processing result by the general data transmission / reception process and the controller immediately sends the response to the control center.

As a major component specification, the central processing unit (CPU) uses the ARM7TDMI 50 MHz to control the controller. The communication processing unit is for transmitting and receiving data through 3 UART ports, UART 1 is for data logger transmission and reception, UART 2 is for wireless controller control and data transmission, and UART 3 is for system check console. The SRAM / FLASH in the memory section is 1M or more for basic data and data storage, the EEPROM is 64K x 16bit for operating program storage, and the DRAM is 8M or more for program operating memory for storing data. The power supply unit is for supplying power to the controller, and DC 5V / DC 3V / AC220V. The display unit displays the display using red and green LEDs.

As the controller external structure, the front structure is shown in FIG. 7, the rear structure is shown in FIG. 8, and the layout of the controller is shown in FIG. 9 and the wiring diagram is shown in FIG. 11 is a diagram showing the detailed structure of each part, SRAM can be replaced by FLASH, and the wireless transceiver (modem) will be supported by the industrial complex in the lease with the terminal company in the future, so that the installation space, power, etc. for easy installation and connection Is designed in consideration of.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

Therefore, the wireless transmit / receive controller in the chimney remote monitoring system of the present invention changes the data transmission / reception method between the chimney automatic measurement control center and the workplace from a conventional wired method to a wireless (CDMA) method, thereby wirelessly converting data transmitted from the data logger. It is an advantage that it can be changed to a suitable protocol, and it is easy to install and maintain and provide efficiency for improving data transmission rate.

Claims (9)

A power supply unit supplying power to prevent data from being lost; A memory unit for storing the data; A communication processor for transmitting and receiving the data; A display unit for displaying a transmission / reception status of the data; And a central processing unit for controlling a controller, wherein the wireless transmission / reception controller in the chimney remote monitoring system, wherein the memory unit, A self-diagnostic unit for stopping transmission and reception through automatic booting when the controller error occurs and determining whether there is an abnormality of the controller; A data logger data receiving unit for sequentially storing the data in a nonvolatile memory; Wireless transmission unit for transmitting the data on the pollutant discharged from the chimney in a packet to the control center; And Controller setting value changing unit for controlling the controller Wireless transmission and reception controller in the chimney remote monitoring system comprising a. The method of claim 1, The controller transmits a control command from the control center to the data logger and transmits the result of the processing in the data logger to the control center wireless transmission and reception controller in the remote monitoring system. The method of claim 1, The self-diagnostic unit is a wireless transmission and reception controller in the chimney remote monitoring system to determine whether there is an abnormality of the controller by performing a self-diagnosis to prevent interruption of the transmission and reception function by automatic booting when an error occurs using the Watch Dog Timer. The method of claim 1, The data logger data receiver is a wireless transmission and reception controller in the chimney remote monitoring system capable of preserving the data by storing the data received in the non-volatile memory when the power is disconnected. The method of claim 1, In the chimney remote monitoring system for measuring the wireless network quality value to the data transmitted from the data logger to the control center to monitor the line status, and to record the data transmitted in the log to track remotely Wireless Transceiver Controller. The method of claim 1, The controller setting value changing unit changes the setting value, and receives the data from the control center wireless transmission and reception controller in the chimney remote monitoring system for upgrading the controller. delete delete delete

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