KR100799976B1 - Management system of direct digital controller and the method for managing thereof - Google Patents

Abstract

A DDC(Direct Digital Controller) monitoring system and a method are provided to prevent an erroneous operation of the DDC by recording and searching event information about the operation of a DDC with time information. A DDC monitoring system for monitoring an operation state of a DDC(300) for managing building facilities is composed of a sensing unit for sensing the opening and closing state of a control panel; an image obtaining unit for obtaining an image of a user in the DDC if the sensing unit determines that the control panel is opened; an image information processing unit for processing image information corresponding to the starting time and finishing time for the image obtained by the image obtaining unit; and a storing unit for storing image information processed through the image information processing unit, and all operation information of the DDC during the open time of the control panel, as event data frame.

Description

Management system of direct digital controller and the method for managing approximately

The present invention relates to a direct digital controller (DDC) controller monitoring system and a monitoring method thereof, and more particularly, to a DDC controller monitoring system and a monitoring method capable of acquiring history information on the operation of the DDC controller and preventing malfunctions. will be.

Risk detection in a building facility compares the data measured during the continuous and objective monitoring with the analysis data of the facility to identify the current situation and to identify the problems that may arise in the early stages. Can be obtained.

Therefore, it is most important that the facilities of the building identify safety status by continuously observing, collecting, storing, and analyzing abnormal conditions of the facilities occurring during use based on the acquired data.

Recently, office buildings have been enlarged and highly functional, and various facilities such as air conditioning, sanitation, electric power, crime prevention, and disaster prevention are intricately combined. Building Automation System (BAS), which is built to monitor and control these facilities, includes Central Control Management System (CCMS), Direct Digital Controller (DDC), and Local Equipment (Local). Devices).

In operating the building automation system, it is reliable and fast to share a lot of information necessary for the control and monitoring of various facilities and systems (air conditioning control, power control, lighting control, parking control, elevator, etc.). It is essential to build a communication infrastructure, and BACnet (Building Automation & Control Network) has been adopted as the international standard of communication methods related to such building automation.

1 is an overall configuration diagram of an integrated building automatic control system applied to a general office building, the heat source and air conditioning equipment monitoring control, power and lighting equipment monitoring control, access control, disaster prevention, parking management and facility management of the integrated system The configuration is shown.

That is, in FIG. 1, the central monitoring system is the most important system that comprehensively monitors and controls the situation of the entire building, and includes a primary building automation server (21) and a backup building automation server (22). , Hardware operator station (23), lighting / power operator station (24), access control station (25), disaster prevention station (26), parking management station (ITS Station: Intelligent Transport System Station; 27) and facility management station ( FMS: Facility Management

System; 28). At this time, each of the servers and stations are interconnected by a redundant 10Base-T Ethernet Switch Hub (10) to enable communication and information sharing.

In addition, the control information device (DDC) records and stores all equipment-related information such as control outputs and state changes of the building equipments in the building through control points set in various sensors and manipulators. A microcomputer that applies a control operation signal to a control unit through an operation process, is connected to a central monitoring system through a gateway and / or a communication network to exchange necessary information. As described above, the controller of the DDC uses the supervisory control for each point of the facility and a function block built-in to direct the central monitoring system to the central monitoring system in order to smoothly control the air conditioning and other facilities installed in the building. Even if not received, it is a controller that can be controlled directly locally.

The chiller / Booster Interface 30 of FIG. 1, the control information device 41, the lighting equipment control node 60, and the programmable logic control 70 (PLC) correspond to the control information device. As such, the control information that collectively controls the air conditioner, heat source, and power equipment is called a system level control information (System Level DDC).

Zone control information (Zone DDC) is divided into a number of zones (zone) in the interior of the building when the variable air volume (VAV: Variable Air Volume) method is applied to the room temperature controller 54 and the variable air volume unit (VAV Unit); A zone level control information controller for controlling 55, which is distinguished from the system level control information devices 30, 41, 60, and 70 by a hierarchical structure or an installation position of a network. In addition, in the configuration shown in FIG. 1, the non-described reference numerals refer to a typical system, and detailed description thereof will be omitted.

In addition, the field equipment is composed of various sensors for measuring temperature, humidity, pressure, wind speed, fingerprint, fire, parking, electric power, etc., various actuators such as damper controls, valve controls, dampers, valves, and the like.

In such a building automatic control system, in order to construct an Optimal Management System (OMS) for energy saving and fire prevention, it is possible to measure, collect and organize the operation information of each facility and various real-time environmental information inside and outside the building. A control information system and a communication infrastructure for transmitting such information to an optimal management system through a communication network should be provided.

In addition, in order to maintain optimal energy efficiency of the building and to use the equipment safely for a long time, it must be well-maintained, such as timely inspection and repair. There is a method of breakdown maintenance (BM) and preventive maintenance (PM) or predictive maintenance to identify the cause of the failure in advance. Among these, the method of preventive maintenance or predictive maintenance is preferable because it is less expensive and helps to save energy than the method of post maintenance. However, the existing facility management system applied to existing buildings is merely a computerized aspect of the facility manager's business, and it does not have the necessary control points for measuring the efficiency and aging of the equipment. There was a problem that the method of preservation could not be applied. In addition, the existing facility management system has a problem that it is not possible to set the operating conditions in consideration of the facility status because there is no interface with the control information (DDC) responsible for distributed control of the automatic building control system.

An example of a technique for solving such a problem is disclosed in Document 1 below.

The intelligent control information of office building equipment disclosed in Document 1 constitutes an MS / TP protocol module and a building automation system that can communicate with an external control device by using a BACnet MS / TP protocol applied to a building automation system of an office building. A / D conversion and D / A conversion unit for converting an analog signal into a digital signal among the electronic signals input from each field device and converting a control signal for the field device into an analog signal, a plurality of corresponding to each field device A control memory for controlling and calculating operations by embedding control loops, a first memory for storing an operation program of a control information device and information necessary for the operation of the control computing device, and a data processing for transmitting / receiving data with an MS / TP protocol module. 1 MS / TP interface, provides standard object and service functions defined in the BackNet specification, Ethernet interface and A / D conversion that is connected to upper level management device or server through Ethernet communication network, and sends and receives data, sends and receives data with Backnet protocol stack, Backnet protocol stack which is responsible for converting and interpreting Backnet protocol. And an embedded controller including an input / output interface for converting a physical input / output value between the D / A conversion unit and the control operation unit so as to be processed by software.

[Document 1] Republic of Korea Patent Publication No. 2005-0081019 (published Aug. 18, 2005)

However, in the related art disclosed in the above document, it is an important system that manages all the facilities in a building. However, if only a password consisting of a few simple combinations is input, anyone as well as an administrator can manipulate setting parameters inside the controller, so that the security is weak. There was.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems as described above, and to provide a DDC controller monitoring system and a monitoring method thereof capable of acquiring event information on the operation of the DDC controller.

Another object of the present invention is to provide a DDC controller monitoring system and a method for monitoring the same, which prevent a malfunction of the DDC controller.

In order to achieve the above object, the DDC controller monitoring system according to the present invention is a system for monitoring the operation state of a DDC controller for managing a building facility, the sensing means for detecting the open and closed state of the control panel, by the detecting means If it is determined that the control panel is opened, image acquisition means for acquiring an image of a user in the DDC controller, and image information for processing the image acquired by the image acquisition means into image information corresponding to a start time and an end time. And storage means for storing the image information processed by the processing means and the image information processing means and all operation information of the DDC controller during the opening time of the control panel as an event data frame.

In the DDC controller monitoring system according to the present invention, the event data frame includes an event number, a size, a start time of a door opening time, a start image, an end time of a door closing time, an end image, and an operation of a DDC controller. And an event list for recording contents and operation time.

In the DDC controller monitoring system according to the present invention, the display apparatus further includes display means for displaying the event data frame, and the sensing means is a limit switch.

In the DDC controller monitoring system according to the present invention, the end image is repeatedly acquired at regular time intervals, and the image acquired immediately before closing of the door is stored as the end image.

In addition, the DDC controller monitoring method according to the present invention in order to achieve the above object is a method for monitoring the operation state of the DDC controller for managing the building facilities, the opening detection step of detecting the open state of the control panel using a limit switch, If it is determined that the control panel is opened in the opening detection step, an image acquisition step of acquiring an image of the user from the DDC controller through an image input unit corresponds to a start time and an end time of the image acquired in the image acquisition step. An image information processing step of processing the image information, a storage step of storing the image information processed in the image information processing step and all operation information of the DDC controller during the opening time of the control panel as an event data frame using a limit switch To detect the closed state of the control panel And a chain detection step, wherein the event data frame records an event number, a size, a start time of an opening time of a door, a start image, an end time of an closing time of a door, an end image, contents of an operation, and an operation time. And the end image is repeatedly acquired at regular time intervals, and the image acquired immediately before closing of the door is stored as the end image.

As described above, according to the DDC controller monitoring system and the monitoring method according to the present invention, it is possible to record and retrieve event information about who performed what operation at any time and the operation of the DDC controller, so that the DDC controller can be retrieved. As a result, it is possible not only to identify the cause of the malfunction of the equipment, but also to use it as a backup data for preventing recurrence.

In addition, according to the present invention, there is no need for additional change history management when changing the setting of the DDC controller according to the change of the field equipment, and the effect can be utilized as important data for effective system management only by the event list.

The above and other objects and novel features of the present invention will become more apparent from the description of the specification and the accompanying drawings.

The DDC controller monitoring system according to the present invention is generally the same as that anyone can operate by simply opening the door of the control panel and inputting a password in the DDC controller, but the acquired image immediately before opening and closing the control panel and opening of the control panel. Event list that records all the operation contents and operation time of DDC controller during the time period (Simple control of I / O point, change of equipment operation and schedule control, address setting, I / O point type and input range setting, I / O) O It is possible to record and search the expansion module type and point capacity, control block setting by built-in functions, communication parameter, etc.) as event data frame, and to prevent the malfunction of the equipment by DDC controller. Identify the cause of the problem and prevent the problem from happening repeatedly In order to use it as an important backup data, the monitoring system of the DDC controller is needed.

EMBODIMENT OF THE INVENTION Hereinafter, the structure and operation | movement of this invention are demonstrated according to drawing.

In addition, in description of this invention, the same code | symbol is attached | subjected to the same part and the repeated description is abbreviate | omitted.

2 is a structural diagram of a DDC controller monitoring system according to the present invention, Figure 3 is a block diagram of a DDC controller monitoring system according to the present invention.

2 and 3, the DDC controller monitoring system according to the present invention is largely composed of an image acquisition and storage unit, a data processing unit, and a control unit.

The limit switch 351 of the image acquisition and storage unit is attached to the door of the control panel 100 in which the DDC controller 300 is installed, and immediately transmits the change of the switch contact to the CPU 300A according to the opening / closing of the door. Notifies start / stop of event triggered by interrupt.

The image input unit 352 is composed of a CMOS or CCD and an image processor. When the image input unit 352 is enabled to generate an event data frame under the control of the CPU 300A, the image input unit 352 transmits an optical signal from a CMOS / CCD image sensor. The gain and offset of the white balance and the RGB signal or the YUV signal are controlled and transferred to the memory controller 353 on a screen basis through an automatic gain controller and an A / D converter. When the limit switch 351 is closed, the CPU 300A disables the image input unit.

The video signal of the screen unit coming in through the video input unit 352 described above is stored in the input memory 354 in units of pixels through the memory controller 353, and the video signal is read by the CPU 300A.

The screen unit video signal read from the input memory 354 by the CPU 300A is compressed through a video codec 355 such as a JPEG codec, and the data amount of the screen unit video signal is reduced to a video file format such as JPEG. It is stored in RAM 332 which is a temporary buffer.

In addition, when the limit switch 351 is closed, the event unique number and the size and start time, primary image, end time, secondary image, and DDC controller operation information stored in the temporary buffer 332 are reassembled into event data frames. It is finally stored in a data store (Flash Memory), and the size information of the stored information may include location information of the flash memory 356 to minimize the unused space of the memory. In addition, when the keypad 320 is operated or the event data frame is retrieved from the central server, the CPU 300A may read data by calling an event number.

Watchdog Timer (341) has its own battery and maintains time information such as year, month, day, hour, minute, second, etc., without external power supply. The CPU 300A can acquire it.

In addition, the processing unit according to the present invention CPU 300A, input / output point 310, memory unit, I / O expansion module memory 311, network 312, RS-485 / RS-422 communication port (313, 314) And a keypad 320 and an LCD 360.

The input / output point 310 is directly connected to the facility and, if necessary, has a communication port for point expansion. The digital input of the input / output point 310 receives an input through photocoupler isolation, the digital output provides an output through a relay output or a triac, and the analog input selectively selects a resistance value input, a constant current input, and a constant voltage input. Analog output section consists of a circuit for constant current output and each input / output point is read / write to memory.

In addition, the memory unit includes a ROM 330 in which a firmware program is stored, a RAM 332 used as a temporary buffer related to a variable value, an input / output point, an event data frame, and the like, and a control block based on configuration values or built-in functions. It consists of an NVSRAM 331 which is a nonvolatile memory for storing setting values.

In the present invention, when communicating with the open system structure during the data communication between the DDC controller 300 and the HMI 210, using the network 312 port to interface with the US standard BACnet open protocol, etc., otherwise general purpose RS Use the 485 / RS-422 communication ports (313,314) to communicate with the fieldbus communication protocol.

The operator of the DDC controller 300 receives a control input through the keypad 320 when the operator sets the environment, forcibly controls input / output points, and searches for event data frames. The purpose of using a plurality of keys varies according to the LCD display menu.

In addition, when the operator sets the environment and controls the input / output point of the DDC controller 300, the operator takes the display on the LCD 360 according to the control menu determined in conjunction with the keypad 320, and the operator checks its message and operates the DDC. . In addition, the event number of the event data frame stored in the flash memory 356 may be searched to check the stored image and the event list if necessary.

DDC controller 300 is equipped with a high-speed 32-bit CPU (300A) or more, and is operated by the built-in firmware when performing simple I / O management, communication interface and memory management, and other data management with the upper system, especially built-in control By using the block, it is possible to directly control the equipment by its own judgment without information exchange or instruction with the central center, and also the schedule control is possible, so it is free from the communication path with the central center and the whole system is distributed control by local DDC. Is programmed to be possible.

The built-in functions can be freely set and used in the control block, and some of them can be processed in hardware and some in software so that multiple control blocks can be processed at the same time.

In addition, the control center to which the present invention is applied has an HMI 210, which is installed in a central server and serves as a central control of the facility control system, and monitors and controls the local state of the local DDC on its GUI screen by itself. It supports the ability to interface the database with external and open systems.

Next, the operation of the DDC controller monitoring system shown in FIG. 3 will be described with reference to FIGS. 4 and 5.

4 is a flowchart illustrating the operation of the DDC controller monitoring system according to the present invention, Figure 5 is a diagram showing the structure of the event data frame.

When the user opens the door of the control panel 100 in which the DDC controller 300 is installed, the CPU 300A immediately detects the open state of the door by the limit switch 351 and through a watchdog timer. Read the start time information. The CMOS / CCD module of the image input unit 352 is enabled to process the acquired image and store the image in the input memory 354 in units of screens.

In addition, the structure of the event data frame is as shown in FIG. That is, the structure of the event data frame according to the present invention includes the event number, the size, the start time of the door opening time, the start image, the end time of the door closing time, the end image, and the operation of the DDC controller during the door opening time. It consists of a list of events that record all the content and the time of operation.

The CPU 300A stores the image of this screen unit with the start time information in the RAM 332 which is the primary temporary buffer through the CODEC 355. If the user enters a password and the CPU 300A fails to confirm, all operation information is stored in the temporary buffer RAM together with the event time information at that time, and the image of the screen unit of the input memory 354 is coded every few seconds. Through the 355, periodically stored in the RAM, which is a secondary temporary buffer. The operation information and the secondary image are acquired until the CPU 300A detects the closed state of the door by the limit switch 351 when the user finishes all work and closes the door of the control panel 100. At this time, the end time information is stored in the secondary image temporary buffer area. The event number, size, start time, primary image, end time, secondary image, and DDC controller operation information of the operation are reassembled into event data frames and finally stored in the flash memory 356 as a data store. do.

In addition, the end image is repeatedly acquired at regular time intervals, for example, 10 second intervals, depending on the storage capacity of the memory for storing the image information, and the image acquired immediately before the closing of the door is stored as the end image.

The stored information of the event data frame can be retrieved through the LCD 360 by searching for the event number, and the event data frame information stored in each DDC controller unit can be retrieved from the central server through the network 312. .

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

The DDC controller monitoring system and its monitoring method according to the present invention are useful for the management of building facilities.

1 is a block diagram of a conventional building management system,

2 is an external view of a DDC controller monitoring system according to the present invention;

3 is a block diagram of a DDC controller monitoring system in accordance with the present invention;

4 is a flowchart illustrating the operation of the DDC controller monitoring system according to the present invention;

5 is a diagram showing the structure of an event data frame.

Claims (5)

As a system for monitoring the operation status of the DDC controller for managing building facilities, Sensing means for detecting the open and closed state of the control panel, Image acquisition means for acquiring an image of a user by the DDC controller when it is determined that the control panel is opened by the sensing means; Image information processing means for processing the image acquired by the image acquisition means into image information corresponding to a start time and an end time; And storage means for storing the image information processed by the image information processing means and all operation information of the DDC controller during an opening time of the control panel as an event data frame. The method of claim 1, The event data frame includes an event number, a size, a start time of a door opening time, a start image, an end time of a door closing time, an end image, and all operation contents and operation time of the DDC controller during the opening time of the control panel. DDC controller monitoring system comprising a list of events to record. The method of claim 2, Display means for displaying the event data frame, And said sensing means is a limit switch. The method of claim 2, And the end image is repeatedly acquired at predetermined time intervals, and the image acquired immediately before closing of the door is stored as the end image. As a method of monitoring the operation status of the DDC controller for managing building facilities, Open detection step for detecting the open state of the control panel using a limit switch, An image acquisition step of acquiring an image of a user from the DDC controller through an image input unit when it is determined that the control panel is opened in the opening detection step; An image information processing step of processing image information corresponding to a start time and an end time of an image acquired in the image acquisition step; A storage step of storing the image information processed in the image information processing step and all operation information of the DDC controller during the opening time of the control panel as an event data frame; A closing detection step of detecting a closing state of the control panel by using a limit switch, The event data frame includes an event number, a size, a start time of a door opening time, a start image, an end time of a door closing time, an end image, and all operation contents and operation time of the DDC controller during the opening time of the control panel. Consists of a list of events to record, And the end image is repeatedly acquired at predetermined time intervals, and the image acquired immediately before closing of the door is stored as the end image.

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