KR20060115513A - Method for monitoring power supply of wireless data logger and wireless data logger for monitoring power supply - Google Patents

Abstract

A method for monitoring power of a WDL(Wireless Data Logger) terminal and the WDL terminal having a power monitoring function are provided to assure a minimum function, which is a data collection/storage function, by continuously collecting and storing the measurement data received from a measurement equipment even in case that an abnormal state of power occurs. A method for monitoring power of a WDL(Wireless Data Logger) terminal comprises the following several steps. A power unit transmits a normal state signal to a controller wherein the normal state signal means that an external power is supplied for the WDL terminal in case that power outputted from the power unit is supplied by the external power which conforms to a certain level(S200). Then, the controller sets the WDL terminal in a data storage and wireless internet communication mode, and cyclically checks whether an abnormal power state signal is received from the power unit(S202). In case that the abnormal power state signal is received, the power unit transmits the abnormal power state signal to the controller(S204). In case that the abnormal power state signal is received from the power unit, the controller converts the data storage and wireless internet communication mode into a data storage mode(S206).

Description

Method for Monitoring Power Supply of Wireless Data Logger and Wireless Data Logger for Monitoring Power Supply}

1 is a block diagram schematically illustrating an internal configuration of a WDL terminal having a power monitoring function according to an embodiment of the present invention;

2 is a flowchart illustrating a method of providing a self power monitoring function in a WDL terminal according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: program storage unit 110: memory unit

120: control unit 130: power supply unit

140: communication unit 150: sensor interface unit

The present invention relates to a power monitoring method of a wireless data logger (WDL) terminal and a WDL terminal having a power monitoring function. More specifically, when the external power is supplied to the commercial power of the data logger, when the external power is cut off or abnormal while operating in the data storage and wireless internet communication mode, the internal power that is a standby power supply is driven to the data storage mode. The present invention relates to a power monitoring method of a WDL (Wireless Data Logger) terminal performing a function of switching to a WDL terminal and a WDL terminal having a power monitoring function.

In general, a data logger for performing a remote control measurement service collects and stores measurement data collected from various measurement sensors, transmits the collected measurement data wirelessly, and transmits the measurement data to a server or a monitoring system located at a remote location. It is characterized by.

Therefore, the data logger receives a sensor interface unit for real-time monitoring of measurement data input from a sensor installed in measurement equipment or a mechanical facility, a controller for receiving a predetermined signal sensed by the sensor, and processes the received signal and data. It consists of a communication module for transmitting to a server or an external system installed in.

In addition, the data logger collects and stores measurement data by connecting to a predetermined device, and when receiving a request command signal of measurement data, transmits the stored measurement data to a server through a communication means to determine whether there is an abnormality of the measurement data. do.

If a communication service failure occurs due to a failure of the power supply unit of the data logger for performing the remote control measurement service, the loss and failure of the measurement data transmitted from the measurement equipment connected to the mechanical facility or equipment and the loss of the stored measurement data This can happen. Therefore, various systems such as power, water level, and the environment being monitored cannot be monitored in real time, so it is difficult to immediately deal with emergencies and prevent disasters caused by breakdowns in machinery or equipment.

In general, a power supply state management system uses a power monitoring chip attached to a power supply unit that supplies power, and when the power supply state falls below a reference voltage specified by an administrator, the power supply unit supplies power to the system. Reset to return to normal state.

In this conventional method, if the power supply is unstable and the power supply is unstable, the power supply is unconditionally reset, so that the system operating in real time goes down without prior preparation, and thus various data transmitted in real time between communication systems or within the communication system are lost. There is a problem that the telemetry service is stopped.

In addition, recently, in order to solve this problem, when an abnormal signal is detected on the power supply through a device that monitors the power supply and voltage fluctuations in real time, an administrator generates an alarm signal including an alarm sound. Although the calling method is used, it is a technology that cannot be utilized in a remote control measurement system using wireless data communication.

The present invention has been made in view of the above, WDL terminal for stably supplying the power of the data logger that can safely store and manage the measurement data transmitted from the measurement equipment to overcome the power failure that can occur in the commercial power of the data logger and To provide a method.

In order to solve this problem, the present invention, when the external power is supplied to the commercial power of the data logger, while operating in the data storage and wireless Internet communication mode when the external power is cut off or abnormality, the internal power that is a spare power supply The present invention provides a WDL (Wireless Data Logger) terminal and a method having a power monitoring function to transmit a power failure alarm message to an external device and to switch to a data storage mode.

According to a first object of the present invention for realizing the above object, the measurement data is collected, stored and transmitted to an external system through a communication network, and when an error occurs in the measurement data, an alarm message is sent to the external system through the communication network. A power monitoring method of a wireless data logger (WDL) terminal including a power supply unit configured to perform an alarm function and to drive an internal power source when an external power is cut off, wherein the WDL terminal includes: (a) normal power supply by the external power source; Receiving a 'normal state signal' as an indication that the supply is being made; (b) periodically performing a function of collecting / storing the measurement data and transmitting the data to the external system by setting the data storage and the wireless internet communication mode to operate with the external power; (c) checking whether the power supply unit receives a 'voltage abnormal state signal' meaning that normal power supply is not made from an external power source; And (d) periodically performing the collection / storage function of the measurement data by setting a data storage mode operating with the internal power supply when the voltage abnormal state signal is received in step (c). It provides a power monitoring method of the WDL terminal, characterized in that.

According to a second object of the present invention, in a WDL (Wireless Data Logger) terminal that collects, stores, and transmits measurement data to an external system through a communication network, the WDL terminal uses an external power source as an ordinary power source and an internal power source as an emergency power source. When the external power is supplied, the WDL terminal sets the data storage and wireless internet communication mode to perform the collection / storage function of the measurement data and the transmission to the external system, and the external power is cut off or In the event of an abnormality, a WDL terminal having a power monitoring function is provided, wherein the internal power source is driven to switch to a data storage mode and the collection / storage function of the measurement data is performed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used 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 well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram schematically illustrating an internal configuration of a wireless data logger (WDL) terminal having a power monitoring function according to an exemplary embodiment of the present invention.

WDL terminal according to a preferred embodiment of the present invention comprises a program storage unit 100, a memory unit 110, a control unit 120, a power supply unit 130, a communication unit 140, a sensor interface unit 150, etc. do.

WDL terminal is a device that provides remote control measurement service using wireless data communication. It receives, stores and manages measurement data through various interfaces (level, flow rate, pressure, temperature, humidity, gas, etc.) and various interfaces in the field. In addition, it transmits the stored measurement data to external system through communication network and provides self alarm function by diagnosing measurement abnormality of machinery or machinery.

The WDL terminal for performing such a remote control measurement service has a basic function of transmitting largely collected measurement data to an external system through a communication network. In case of occurrence, the system may further include a function of transmitting an alarm message SMS to an external system through a communication network. Here, the external system refers to a system capable of receiving and managing measurement data or alarm messages from a WDL terminal, such as an external management system or a mobile communication terminal of an administrator.

The program storage unit 100 has a built-in remote control measurement service program that can transmit its own alarm message (SMS) due to measurement data and equipment abnormal signals to an external system. The remote control measurement service program receives, collects and stores measurement data measured from measurement equipment, and transmits the stored measurement data to an external management system or a mobile communication terminal through a communication network. In addition, the remote control measurement service program measures the abnormal state of the equipment by using the measurement equipment connected to the machine or the machine, and when the power, sensor and data of the machine or the machine is abnormal, It sends a alarm message to an external management system or mobile communication terminal through a communication network.

In addition, the remote control measurement service program periodically diagnoses and reports the status of equipment on a machine or a machine to alert an external management system or a mobile terminal when an abnormal state of the machine or a device occurs. After a certain period of time, the administrator resends an alarm message when there is no action on the device's abnormal condition. When a certain action is taken on the alarm condition, the administrator sends a status termination message on the device's error condition. do.

In addition, when the external power is supplied, the remote control measurement service program operates in a normal data storage and wireless Internet communication mode, and when the external power is cut off or abnormally occurs, the remote control measurement service program switches to the data storage mode by driving the internal power. .

Such a remote control measurement service program can be implemented in various ways depending on the operating system (OS) of the WDL terminal. For example, the remote control measurement service program can be implemented in the 'C' programming language, or the object-oriented 'C ++' or 'JAVA' programming language.

The memory unit 110 temporarily stores data processed by the control unit 120, or a customized alarm according to the measurement data transmitted from the measurement equipment according to the remote control measurement service program and the abnormal state of the equipment for the mechanical equipment or the mechanical device. Temporarily saves messages.

The controller 120 is connected to each device such as the program storage unit 100, the power supply unit 130, and the communication unit 140 to control the overall operation of the WDL terminal, and in particular, the remote control stored in the program storage unit 100. It operates measurement service program to collect and store measurement data from measurement equipment, transmit the stored measurement data to external system through communication network, and send alarm message when there is an abnormality of power, sensor and data of a mechanical facility or device. Control to send to external system through.

The control unit 120 functions to block external unspecified messages or telephone connections so that only a designated administrator can access the security function of the WDL terminal, and when an error occurs in the power, sensors, and data of a machine or device It generates and sends a customized alarm message suitable for abnormal conditions or types of equipment, and controls a message bidirectional interface that controls such a message when it is edited remotely from an external system.

The controller 120 controls to connect a voice call to the mobile communication terminal of the manager in order to prevent the loss of the alarm message due to the administrator's bedtime when an alarm situation occurs due to the abnormality of the equipment at night.

The controller 120 normally drives the WDL terminal in the data storage and wireless Internet communication mode with an external power source, and when a failure or abnormality occurs in the external power source, the controller 120 operates the internal power source, which is its own battery, to switch to the data storage mode. When the WDL terminal operates in the data storage mode, the measurement data received from the measurement equipment cannot be transmitted to the external system, and the data storage function is stored in the WDL terminal, and an error has occurred in the power supply of the device. An alarm message is generated and sent to the external system.

The power supply unit 130 is configured to include an internal power source using a battery and / or an external power source using a commercial power source. The power supply unit 130 supplies power for the operation of the WDL terminal to internal devices of the WDL terminal such as the memory unit 110, the control unit 120, and the communication unit 140.

The external power source is a power source for supplying 12 to 24V to the WDL terminal. When the external power source is supplied to the WDL terminal, the controller 120 sets the WDL terminal to a data storage and wireless Internet communication mode.

Here, the data storage and wireless Internet communication mode performs all the functions of a typical WDL terminal, and collects, stores, and wirelessly transmits measurement data from a measurement device, an alarm function for an abnormal state of a device, and a message corresponding to an alarm situation. (Bi-Directional) Remote editing function, Diagnosis and reporting of periodic equipment status, Send alarm message, Re-alarm function if there is no action on the equipment's abnormal condition for a certain period of time It performs the function to connect the voice call with the manager when the night alarm occurs.

The internal power source is composed of one 3V battery as the internal battery power, and when an external power supply fails to supply power to the WDL terminal, the controller 120 sets the WDL terminal to the data storage mode using the internal power.

Here, the data storage mode is a function of collecting and storing measurement data from measurement equipment among the functions of the data storage and wireless internet communication mode described above, and an abnormal state of the equipment when an abnormality occurs in power, sensors, and data of a mechanical facility or a mechanical device. Alternatively, only a function of generating a customized alarm message suitable for the type of equipment and transmitting it to an external system through a communication network for a certain period of time.

The communication unit 140 uses the CDMA (Code Division Multiple Access) 1X, IS-95A / B protocol, Internet protocol (TCP / IP / UDP), and Short Message Service (SMS) IS-637 protocol and the like to measure data and abnormal conditions. Communication module for transmitting an alarm message according to the external management system or a mobile communication terminal through a communication network.

The sensor interface unit 150 is connected to measurement equipment for measuring the measurement data of the mechanical equipment or the device and the abnormal state of the equipment, such as RS-232C communication, digital contacts, and analog data (4 to 20 mA, 1 to 5 V). It serves as a path for collecting and storing data and signals through various interfaces.

2 is a flowchart illustrating a method of providing a self power monitoring function in a WDL terminal according to an exemplary embodiment of the present invention.

First, when the power output from the power supply unit 130 of the WDL terminal is supplied by an external power source that meets a predetermined standard (12 to 24V), the power supply unit 130 is supplied with power to the WDL terminal as an external power source. The signal 'normal state signal' is transmitted to the control unit 120 (S200). Subsequently, the controller 120 sets the WDL terminal to a data storage and wireless internet communication mode. In addition, the control unit 120 periodically checks whether a 'voltage abnormal state signal' is received from the power supply unit 130 (S202).

When the 'voltage abnormal state signal' is received from the power supply unit 130 in step S202, that is, when the power is not supplied to the WDL terminal by the external power supply (including a case where the predetermined voltage reference is not reached), the power supply unit 130 controls the control unit. The voltage abnormal state signal is transmitted to 120 (S204). When the controller 120 receives the 'voltage abnormal state signal' from the power supply 130, the controller 120 converts the WDL terminal into the data storage mode and sets the data storage mode (S206).

The control unit 120 sets the WDL terminal to the data storage and wireless Internet communication mode when the 'normal state signal' is received from the power supply unit 130, and sets the WDL terminal to the data storage mode when the 'voltage abnormal state signal' is received. do.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, according to the present invention, even when an external power supply is cut off or abnormally generated, the present invention continuously collects and stores measurement data received from measurement equipment by driving the internal power supply, so that even when a power failure occurs, WDL (Wireless Data) Data collection / storage function, which is the minimum function of the logger, can be obtained.

In addition, the present invention has the effect that even when the external power is cut off or abnormality, by driving the internal power supply to send an alarm message indicating the power failure to the external system to take appropriate measures.

Claims (6)

Collect and store measurement data and transmit it to an external system through a communication network.If an error occurs in the measurement data, an alarm message is transmitted to the external system through the communication network to perform an alarm function. A power monitoring method of a wireless data logger (WDL) terminal including a power supply unit for driving a power supply, the WDL terminal includes: (a) receiving a 'normal state signal' as an indication that normal power is supplied by the external power; (b) periodically performing a function of collecting / storing the measurement data and transmitting the data to the external system by setting the data storage and the wireless internet communication mode to operate with the external power; (c) checking whether the power supply unit receives a 'voltage abnormal state signal' meaning that normal power supply is not made from an external power source; And (d) periodically performing the collection / storage function of the measurement data by setting a data storage mode operating with the internal power source when the voltage abnormal state signal is received in step (c); Power monitoring method of a WDL terminal comprising a. The method of claim 1, The data storage mode generates an alarm message indicating that an error has occurred in the external power source in addition to the collection / storage function of the measurement data from the measurement equipment, and transmits the alarm message to the external system through the communication network to generate a power failure alarm. A power monitoring method of a WDL terminal, characterized in that for performing a function. The WDL terminal of claim 2, Abnormal condition alarm function of equipment such as machinery or machinery; Two-way remote editing of alarm messages; A function of retransmitting the alarm message if the steady state signal is not received from the measurement device for a preset time after transmitting the alarm message about an abnormal state of the power, sensor and data of the equipment to the external system;  Transmitting a situation end message when the steady state signal is received from the measurement equipment during the preset time; Voice call connection function with night alarm The power monitoring method of the WDL terminal, characterized in that for performing any one or more of the additional function. In the WDL (Wireless Data Logger) terminal that collects, stores, and transmits measurement data to an external system through a communication network, the WDL terminal includes an external power source as an ordinary power source and an internal power source as an emergency power source, When the external power is supplied, the WDL terminal sets the data storage and wireless Internet communication mode to perform the collection / storage function and the transmission function to the external system, and the external power is cut off or abnormal. If so, the WDL terminal having a power monitoring function, characterized in that for driving the internal power supply to switch to a data storage mode and performing the collection / storage function of the measurement data. The method of claim 4, wherein In the data storage mode, in addition to the collection / storage function of the measurement data from the measurement equipment, a power failure alarm function of generating an alarm message indicating that an abnormality has occurred in the external power source and transmitting the generated alarm message to the external system through the communication network. WDL terminal with a power monitoring function, characterized in that to perform. The method of claim 5, wherein the WDL terminal, Abnormal condition alarm function of equipment such as machinery or machinery; Two-way remote editing of alarm messages; A function of retransmitting the alarm message if the steady state signal is not received from the measurement device for a preset time after transmitting the alarm message about an abnormal state of the power, sensor and data of the equipment to the external system;  Transmitting a situation end message when the steady state signal is received from the measurement equipment during the preset time; And Voice call connection function with night alarm WDL terminal having a power monitoring function, characterized in that further performing any one or more of the functions.

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