KR101238779B1 - Building management control system which uses stand-alone direct digital controller with analog integration and driving time integration and method of direct digital controller - Google Patents

Abstract

PURPOSE: An automatic building management control system using a direct digital controller with analog integration and operation integration functions and a method for controlling the direct digital controller are provided to monitor the amount of energy used in real time by obtaining the amount of power and cold and hot water according to time and sections. CONSTITUTION: An input and output unit outputs a control signal and receives a sensor signal. A storage unit(127) stores an operation condition of a control target. A control unit(121) generates a control signal to control the operation of the control target. An operation time adding unit(125) produces the real operation time of the control target. A web service unit(126) forms an operation state of the control target to a web page screen and provides the formed result to a portable terminal. A data input and output unit(123) includes a general input unit. The general input unit includes an input selection unit, an analog to digital converting unit, and a signal selecting unit. A general output unit includes a current converting unit, a voltage converting unit, and an output selecting unit. [Reference numerals] (112) Communication unit; (121) Control unit; (123) Data input and output unit; (124) Analog adding unit; (125) Operation time adding unit; (126) Web service unit; (127) Storage unit; (128) NFC tag unit

Description

Building management control system which uses stand-alone direct digital controller with analog integration and driving time integration and method of direct digital Controller}

The present invention relates to a building automatic control system and a direct digital controller control method using a direct digital controller, more specifically, a stand-alone direct digital controller capable of independently providing analog integration and operation time integration functions. The present invention relates to a building automatic control system and a direct digital controller control method.

Recently, medium and large buildings such as business buildings, public institution buildings, apartments, etc., have facilities such as air conditioners, boilers, pumps, etc. to maintain indoor air condition, by controlling the temperature, humidity, and cleanness of indoor air. Is built. In addition, a direct digital controller (DDC) and a building facility automatic control system for controlling such a building facility are being built in a building.

The DDC of the conventional automatic building equipment control system does not include a keypad for directly receiving setting parameters from a building equipment operator and an LCD panel for displaying an operation state of a field controller.

Therefore, in order to confirm or control the operation state of the site control device, it was not possible to confirm or control the operation state of the site control device through the central monitoring panel until the construction of the building equipment automatic control system was completed.

In addition, there was a problem in that it is not possible to check the normal operation of the site controller during the construction of the building equipment automatic control system. In addition, when communication between the central monitoring station and the DDC is lost, it is difficult for the building facility manager to check whether the site controller is operating normally.

In order to solve this problem, a direct digital controller having a display unit and an input unit and an automatic control system for a building facility are disclosed in Korean Utility Model Publication No. 20-0427916.

However, according to the prior art, there was a restriction that can check various facilities and equipment in the building only in the place where the manager computer or the DDC is installed. Also, when the communication with the central monitoring station is lost, the building equipment cannot be controlled in accordance with the change of the building equipment. There was a problem.

Therefore, the problem to be solved by the present invention is a stand-alone direct digital controller that adds EMS (Energy Management System), schedule operation, and web service functions to solve the limitations of conventional distance and space constraints. It is to provide a building automatic control system and method used.

The building automatic control system according to an embodiment of the present invention for solving the technical problem, outputs a control signal for controlling the operation of the control target device, corresponding to at least one of the operating state and the operating environment of the control target device A data input / output unit configured to receive a sensor signal output from a sensor, a storage unit storing an operating condition of the control target device, a sensor signal input from the sensor, and an operating condition stored in the storage unit of the control target device. A control unit for generating a control signal for controlling an operation, and the control unit receives a start signal for operating the control target device from the control unit until a stop signal for stopping the operation of the control target device is received from the control unit. The sensor signal is input from the sensor in response to the operation of the target device. And a plurality of direct digital controller containing a cumulative integration operation by time integration to obtain the actual operating time of the parts of the controlled apparatus liver.

The start signal may be a fan motor start signal, and the sensor signal may be one of an ON state signal and a fan motor start state signal of the airflow switch.

The data input / output unit may include an input selection unit configured to receive a warning signal input in an on / off form of a digital signal and a sensor signal input in an analog form in response to a measured value measured by the sensor, and analyze a signal form; An analog-digital converter for converting the analog-type input sensor signal and the digital signal-type input alarm signal into a digital signal that can be processed by the controller and outputting the signal according to the signal type analyzed by the selector, and the analog-digital converter And a general-purpose input unit including a signal selector configured to select and output the output signal to an input port of the corresponding controller.

The plurality of direct digital controllers obtain an instantaneous value by multiplying an analog value of an analog form signal input through the general-purpose input unit to a predetermined scale factor, and accumulate the integrated value for each section and the instantaneous value for an entire period. The method may further include an analog integration unit for obtaining a cumulative integrated value accumulated and accumulated for.

The analog form signal may correspond to a measurement value for at least one of power, cold water flow rate, and hot water flow rate, and the predetermined scale factor may be a parameter for converting to a reference corresponding to a measurement target.

According to another aspect of the present invention, there is provided a method of controlling a direct digital controller included in an automatic building control system, the operation time integrating unit receiving a start signal for operating a control target device, wherein the driving time integrating unit receives the start signal. Accumulating and accumulating the time at which the sensor signal is input from the sensor in response to the operation of the control target device upon receiving the input; And terminating the cumulative integration operation.

According to the present invention, the real-time instantaneous usage, section usage and cumulative usage of power, cold / hot water flow rate, etc. of the building facilities in the DDC through the analog integration function, obtains and monitors the energy usage in real time and efficiently manages energy based thereon. There is an advantage to it.

In addition, the running time integration function has the advantage that the DDC can obtain accurate actual uptime of a building facility.

In addition, the building equipment operator has the advantage of being able to receive live information on the operation status of various equipments directly from the DDC without going through the central monitoring panel through the portable terminal application in the form of a web service.

In addition, the DDC output point can be selected and used by software without dividing it into analog only or digital only, so that it can be used freely and universally without the limitations of analog / digital separation as in the prior art, so that it does not use much DDC unnecessarily. There is an advantage that does not have to.

In addition, the history, repair history, changes, etc. of the building equipment from the NFC tag provided in the DDC is provided through the short-range wireless communication has the advantage that can easily and quickly respond to the maintenance of the equipment even if the manager is replaced later.

1 is a block diagram showing the configuration of the automatic building equipment control system according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating the configuration of the DDC illustrated in FIG. 1 in more detail.
FIG. 3 is a block diagram provided to explain the configuration of the data input / output unit of FIG. 2.
FIG. 4 is a flowchart provided to explain the operation of the analog integrator illustrated in FIG. 2.
FIG. 5 is a flowchart provided to explain an operation of an operation time integration unit illustrated in FIG. 2.
6 is a diagram illustrating a web page screen provided by the DDC according to an embodiment of the present invention.
7 is a block diagram provided to explain an operation of controlling a control target device by interworking with a plurality of DDCs according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a block diagram showing the configuration of the automatic building equipment control system according to an embodiment of the present invention.

Referring to Figure 1, the building equipment automatic control system according to an embodiment of the present invention may include a central monitoring panel 110, a plurality of direct digital controller (DDC: 120) and the communication network 130. The building equipment automatic control system can perform the operation control, monitoring and usage history management of various building equipment such as air conditioners, refrigerators, boilers, etc. installed in the building. To this end, the building equipment automatic control system controls the operation of a fan motor, a valve actuator, and the like (hereinafter referred to as the control target device 160) installed in the building equipment, and various sensors such as a temperature sensor, a humidity sensor, and an air flow switch. A sensor signal output in response to an operation state and an operating environment of the control target device 160 may be input from the 170. Of course, the operation state signal may be directly input from the control target device 160.

On the other hand, the building equipment automatic control system is connected to the mobile terminal 150, such as a smart phone through the Internet network 140 can provide SMS, voice information, such as information on the operation status of the building equipment to the building equipment manager, In addition, the control command from the mobile terminal 150 may be received to control and monitor the operation of the control target device 160.

In particular, the automatic building equipment control system according to the present invention includes a web service function in the DDC 120, so that the mobile terminal 150 is directly connected to the DDC 120 through the Internet network 140 without passing through the central monitoring panel 110. Various information about the operation and status of the control target device 160 to request access may be requested. The DDC 120 may then provide the mobile terminal 150 with the web page including the corresponding information. In addition, the building facility manager may directly connect to the DDC 120 through the mobile terminal 150 and transmit various control commands.

The communication network 130 may be implemented as a local area network (LAN), such as Ethernet, and supports bidirectional communication between the central station 110 and the DDC 120 as well as bidirectionally between the plurality of DDCs 120. It can also support communication. Two-way communication between the central monitoring panel 110 and the DDC 120 may be made by protocols such as TCP / IP, BACnet / IP, Modbus RS-485, and MSTP RS-485. Meanwhile, the communication network 130 may include communication equipment such as a router (not shown) and a bridge (not shown) to support two-way communication between the central monitoring panel 110 and the DDC 120. The central monitoring panel 110 and the DDC 120 may provide various information and data as necessary to the portable terminal 150 of a manager located at a remote location connected to the 140.

The central monitoring unit 110 is a communication terminal device used by a building facility manager in a building facility management room, and is connected to the DDC 120 through a communication network 140 to exchange various information and data. In addition, the central monitoring panel 110 may transmit the control command and the setting value input from the administrator to the DDC 120 to monitor and control the control target device 160. Here, the control command may be a start / stop command for the building equipment. The set value may be an upper and lower limit set by the starting condition of the building equipment. For example, in the case of a boiler, it may be controlled to start at a temperature set as a lower limit of the room temperature and to stop starting at a temperature set to an upper limit of the room temperature. As another example of the set value, if the upper limit value for the number of start stop operations of the control target device 160 is set, the control target device 160 can be monitored by generating an alarm when the number of start stop operations exceeds the corresponding upper limit value. have.

In addition, the central monitoring panel 110 stores various information such as the operation state of the control target device 160 and the measured value (temperature, humidity, air cleanliness, etc.) reported from the DDC 120. On the other hand, the central monitoring unit 110 may inform the administrator by displaying information on the operation state and the operating environment of the control target device 160 on the screen.

The DDC 120 directly controls the control target device 160 based on the control command and the set value transmitted from the central monitor panel 110, and provides the central monitor panel with information on the operation state and the operating environment of the control target device 160. Report to (110).

In particular, the DDC 120 according to the present invention can receive a control command and a set value directly from the building equipment manager without receiving the central monitoring panel 110, and independently monitors and controls the control target device 160. It can also be done. To this end, the DDC 120 may provide a web service, a running time integration, a schedule driving function, and may be implemented to be stand-alone.

Next, a DDC according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

FIG. 2 is a block diagram illustrating the configuration of the DDC illustrated in FIG. 1 in more detail.

Referring to FIG. 2, the DDC 120 according to the present invention includes a control unit 121, a communication unit 122, a data input / output unit 123, an analog integration unit 124, an operation time integration unit 125, and a web service unit. 126, the storage unit 127, and the NFC tag unit 128 may be included.

The controller 121 controls the overall operation of the DDC 120, and in particular, controls the operation of the control target device 160 to analyze data and information collected in real time from the control target device 160 to improve energy use efficiency. A function for generating a control command for the user may be performed. To this end, the manager may store operating conditions, etc., of the control target device 160 for improving energy use efficiency in the storage unit 127. For example, the controller 121 may be implemented to control the operation of the control target device 160 according to an algorithm for improving energy use efficiency according to an operating state of the control target device 160, room temperature, humidity, energy usage, and the like. .

The communication unit 122 provides a communication interface for the DDC 120 to exchange various information and data with the central monitoring panel 110 or another DDC 120. In more detail, the communication unit 122 may provide an RS-232, RS-485, and Ethernet communication interface, and may further provide various other communication interfaces according to embodiments.

Meanwhile, in the conventional DDC, digital input (DI) and analog input (AI) are divided into hardware, and digital output (DO) and analog output (AO) are similarly hardware-wise. Were separated. However, in general, DI, AI, DO, and AO are each composed of 8 points, so if any one of DI, AI, DO, and AO exceeds 8 points, there is a problem that a new DDC needs to be added even if there are extra input / output points. In contrast, the data input / output unit 123 according to the present invention provides a general purpose input and a general purpose output function.

Referring to Figure 3 will be described in more detail for the general-purpose input and universal output function of the data input and output unit according to the present invention.

FIG. 3 is a block diagram provided to explain the configuration of the data input / output unit of FIG. 2.

Referring to FIG. 3, the data input / output unit 123 may include a general purpose output unit 1230 and a general purpose input unit 1235.

The general purpose output unit 1230 may include a current converter 1231, a voltage converter 1232, and an output selector 1233.

The current converting unit 1231 and the voltage converting unit 1232 may control signals for controlling the air conditioner air supply, ventilation, exhaust damper opening, air-conditioning and temperature valve control, inverter speed control, etc. It converts into 0-10V current or voltage and outputs it as analog form signal (AO signal). According to the exemplary embodiment, the PWM controller may directly output a PWM signal as an AO signal without passing through the current converter 1231 and the voltage converter 1232.

The output selector 1233 selects an AO signal, a pulse width modulation (PWM) signal, or a digital form signal (DO signal) through the current converter 1231 and the voltage converter 1232 according to the control of the controller 121. To output through the specified output point. The DO signal output may be a control signal for starting / stopping the air conditioner fan, starting / stopping of the refrigerator, and starting / stopping of the pump. The output selector 1233 may be implemented as an analog multiplexer.

In this way, the output point can be selected and used in software according to the control of the controller 121 without dividing the output point into exclusively for AO or DO, so that the output point can be freely used universally without restriction according to the classification of AO and DO. Therefore, there is an advantage of not needing to use many DDCs unnecessarily.

Meanwhile, the general-purpose input unit 1235 may include a signal selector 1236, an analog-digital converter 1237, and an input selector 1238. The general-purpose input unit 1235 is an on / off digital signal type for operating abnormality alarm signals such as an air conditioner fan start / stop state monitoring, a freezer start / stop state monitoring, an air conditioner fire monitoring alarm, and a freezer / boiler. It can be input as a (DI signal), and also measured values measured from various sensors for monitoring air supply, ventilation temperature monitoring, indoor humidity monitoring, and pressure, current, voltage, and power of the control target device 160 (temperature, Humidity information) can be input in analog signal form (AI signal) of resistance value, current value (4-20mA), voltage value (0-10V), voltage value (0-5V). The DI signal and the AI signal input as described above may be transferred to the controller 121 through the following operation.

First, the input selector 1238 may analyze an input signal to distinguish between an analog current signal (4-20 mA), an analog voltage signal (0-10V), an analog voltage signal (0-5V), and an analog resistance value signal input form. . The input selector 1238 may regard the DI signal as a resistance value signal and process the DI signal.

The analog-digital converter 1237 converts the AI signal and the DI signal selected and transmitted by the input selector 1239 into a digital signal that can be processed by the controller 121 and outputs the digital signal.

The signal selector 1236 selects and outputs an input port of the controller 121 corresponding to the AI and DI signals digitally converted by the analog-digital converter 1237.

Referring back to FIG. 2, the analog integrator 124 performs a function of obtaining the section-specific cumulative and cumulative integrated values for the AI input input through the general-purpose input unit 1235 and storing them in the storage unit 127.

An operation of the analog integrating unit 124 will be described in more detail with reference to FIG. 4.

FIG. 4 is a flowchart provided to explain the operation of the analog integrator illustrated in FIG. 2.

Referring to FIG. 4, the analog integrator 124 receives an AI signal through the universal input unit 1235 (S410). Next, an instantaneous value is obtained by multiplying an analog value of the input AI signal by a predetermined scale factor (S420). The scale factor is a parameter for converting an AI signal corresponding to a measured value for power, cold / hot water flow rate, etc. into a reference corresponding to a measurement target.

Thereafter, the analog integrating unit 124 calculates an integrated value for each section in which the instantaneous value obtained in step S420 is integrated during a predetermined section (S430).

Meanwhile, the analog integrating unit 124 may obtain a cumulative integrated value obtained by accumulating and accumulating the instantaneous values obtained in step S420 for all sections (S440).

As described above, the instantaneous value, the integrated value for each section, and the cumulative integrated value for power, cold / hot water flow rate, etc. are obtained to obtain real-time instantaneous consumption, the consumption per section and the cumulative consumption, and the like. In addition, the obtained real-time instantaneous usage, interval usage and cumulative usage may be stored in the storage unit 127 and used as data for improving an algorithm for improving energy efficiency.

The driving time integrating unit 125 performs a function of integrating and obtaining an actual driving time of the control target device 160 according to the control signal output as the DO signal.

FIG. 5 is a flowchart provided to explain an operation of an operation time integration unit illustrated in FIG. 2.

Referring to FIG. 5, first, when the operation time integration unit 125 outputs a DO start signal for starting the air conditioner FAN, starting the refrigerator, starting the pump, and the like from the control unit 121 (S510), enable It is switched to the state (S520).

Thereafter, the operation time accumulator 125 accumulates and accumulates the time that the DI signal is input from the sensor for monitoring the operation of the control target device 160 operating according to the DO start signal (S530). For example, it is assumed that the control target device 160 operating according to the DO start signal is a fan FAN, and whether the control target device 160 operates the airflow switch that is turned on when a wind occurs according to the operation of the fan FAN. Assuming that the sensor to monitor the DI signal is input to the DDC 120 when the airflow switch is turned on. Meanwhile, in addition to a method in which a sensor monitors the operation of the control target device 160 indirectly like an airflow switch and outputs a DI signal, the fan motor starting state signal directly output from the control target device 160 is DI. It may be implemented to be input to the DDC 120 as a signal.

Next, when a DO start stop signal for stopping the air conditioner fan (FAN), stopping the freezer, stopping the pump, etc. is output (S540), the control unit 121 switches to the disabled state and inputs a DI signal. The cumulative integration operation for time is terminated (S550).

As such, the controller 121 may accumulate and accumulate the DI signal input time input only while the DO start signal for starting the device is output, and may record and record the actual operating time of the equipment. If not, for example, the FAN is not actually driven and the airflow switch is turned on for other reasons, and the DI signal is input. In addition, by performing the operation time integration function in the operation time integration unit 125 included in the DDC 120, when the operation time integration is performed by a separate program in the conventional central monitoring panel 110, it may be different from the actual operation time due to communication failure. It can also solve the problem being measured.

Referring back to FIG. 2, the web service unit 126 configures the operation driving state of the control target device 160 monitored by the corresponding DDC 120 as a web page screen as illustrated in FIG. 150). As a result, the manager can be provided with lively information on the operation status of various equipments directly from the DDC 120 without going through the central monitoring panel 110.

The storage unit 127 stores various types of information and data necessary for the operation of the DDC 120 and performs a function of providing the information according to a request of the controller 121. In more detail, the storage unit 127 may store various information and data collected from the sensor 170, and may also store operating conditions and the like of the control target device 160.

The NFC tag unit 128 stores a terminal input state, an output state, an installation method, a history management, etc. of the control target device 160 managed by the corresponding DDC 120, and a portable terminal 150 such as a smartphone used by an administrator. This proximity can provide near field communication. As a result, the manager can intuitively check information on the control target device 160 monitored and managed by the corresponding DDC 120 in the field. In addition, the administrator may record the history, repair history, changes, and the like of the control target device 160 in the NFC tag unit 128 through the mobile terminal 150. As such, the history, repair history, and changes of the control target device 160 can be updated from time to time to the DDC 120 installed near the control target device 160, so that even if the manager is replaced later, You can respond conveniently and quickly. The manager reads the information from the NFC tag unit 128 using the building management application installed on the smartphone, and can record the information on the contrary.

Meanwhile, the DDC 120 according to the present invention performs an integrated control function by interworking with different DDCs 120 without the intervention of the central monitoring panel 110 by exchanging data with a web server client method through the communication network 130. It may be.

For example, as illustrated in FIG. 7, the first DDC 120a is connected to the FAN 160a and the temperature sensor 161, the second DDC 120b is connected to the FAN 160b, and the nth DDC ( Assuming that the cooling temperature valve 162 is connected to the 120n), in the related art, the values measured by the respective DDCs 120a, 120b, and 120n are transmitted to the central monitoring panel 110, and based on this, the central monitoring panel 110 is used. Control was generated by generating a control command signal in.

However, according to the present invention, the first DDC 120a, the second DDC 120b, and the n-th DDC 120n may exchange data with each other through the communication network 130, and interlock with each other to control the device 160. Control can be performed. For example, a temperature value is received from the first DDC 120a and the second DDC 120b and the n-th DDC 120n may control the operation of the FAN 160b and the cooling temperature valve 162 connected thereto. have. Of course, according to the embodiment, the first DDC 120a may control the operation by transmitting a control signal to the FAN 160b and the cooling temperature valve 162 through the second DDC 120b and the n-th DDC 120n. have.

Embodiments of the present invention include a computer-readable medium having program instructions for performing various computer-implemented operations. This medium records a program for executing the automatic building control method using the direct digital controller described above. The medium may include program instructions, data files, data structures, etc., alone or in combination. Examples of such media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD and DVD, programmed instructions such as floptical disk and magneto-optical media, ROM, RAM, And a hardware device configured to store and execute the program. Or such medium may be a transmission medium, such as optical or metal lines, waveguides, etc., including a carrier wave that transmits a signal specifying a program command, data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (7)

A data input / output unit which outputs a control signal for controlling the operation of the control target device and receives a sensor signal output from the sensor corresponding to at least one of an operating state and an operating environment of the control target device;
A storage unit which stores operating conditions of the control target device;
A controller for generating a control signal for controlling an operation of the control target device based on a sensor signal input from the sensor and an operating condition stored in the storage;
After receiving a start signal for operating the control target device from the control unit, a signal corresponding to the operation of the control target device is received from the control unit until the stop signal for stopping the operation of the control target device is received. An operation time integrating unit for accumulating and accumulating time inputted and output from a target device to obtain an actual operating time of the control target device.
A plurality of direct digital controller comprising a; And
A web service unit configured to provide a portable terminal with a web page screen of an operation operation state of a control target device monitored by the plurality of direct digital controllers;
Including,
The start signal is a fan motor start signal,
The signal corresponding to the operation of the control target device is an ON state signal of the airflow switch,
The data input / output unit includes a general purpose input unit and a general purpose output unit,
The universal input unit,
An input selector configured to receive an alarm signal input in the form of an on / off digital signal and a sensor signal input in an analog form in response to the measured value measured by the sensor, and analyze the signal form;
An analog-to-digital converter for converting the analog-type input sensor signal and the digital signal-type input alarm signal into a digital signal that can be processed by the controller according to the signal type analyzed by the input selector, and outputting the digital signal;
A signal selector configured to select and output a signal converted and output by the analog-digital converter to an input port of the corresponding controller;
The general purpose output unit,
A current converter converting the control signal output from the controller into an analog current signal and outputting the current signal;
A voltage converter converting the control signal output from the controller into an analog voltage signal and outputting the analog signal;
An output selector configured to select an analog voltage or current signal output from the current converter and the voltage converter, a PWM signal output from the controller, and a digital signal according to the control of the controller and output the output signal through a predetermined output point Including,
The plurality of direct digital controller,
The instantaneous value is obtained by multiplying an analog value of the analog form signal input through the general-purpose input unit by a predetermined scale factor, and accumulating the accumulated value for each section accumulated in a predetermined period and accumulating the accumulated instantaneous value over the entire period. Further comprising an analog integrator for obtaining a value,
And the web service unit configures a web page screen including the cumulative integrated value. delete delete delete The method of claim 1,
The analog form signal corresponds to a measured value for at least one of power, cold water flow rate, and hot water flow rate,
The predetermined scale factor is a building automatic control system, characterized in that the parameter for converting to a reference corresponding to the measurement target. delete delete

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