KR19980082062A - Booster pump remote control system using public telephone network and its method - Google Patents

Abstract

The present invention relates to a booster pump remote control system using a public telephone network and a method thereof, wherein the remote control system for a booster pump device including a control device for controlling the operation of the pump according to the pressure of the discharge side of the pump includes: And a communication interface and a modem for connecting to the controller, receiving operation data and error data of the control device according to a user's operation command, and changing and controlling the operation condition of the pump according to the user's operation command. And the central control server, which is connected to the control device through a public telephone network, and has a DTMF receiving panel in the central control server for receiving an alarm signal when an abnormality occurs in the control device. The control method is an abnormal occurrence signal from the pump control device in the central control server In case of reception, if there is no error signal or if there is no pump device specified by the user, it controls the pump devices. If there is a pump device specified by the user, the pump device designated by the user is controlled. It is characterized by intensive control.

Description

Remote control supervisory system and method for booster pump using public switched telephone network

The present invention relates to a booster pump remote control system and method for managing and controlling a booster pump control device through a public telephone network.

In general, the pressurized water supply method is to supply water directly from the underground reservoir to the required place in the building by a water pump, and a pressurized tank and a booster are used as the water pump. This pressurized water pump device (hereinafter also referred to as booster pump device), as shown in part of FIG. 1, connects a plurality of pumps P1 to P4 in parallel and connects a pressure tank 112 to the discharge side of the pump. In addition, the pressure sensing unit 113 is provided on the discharge side of the pump, and the control unit 111 receives a signal from the pressure sensing unit 113 and controls the operation start / stop of the pump. In addition, although not shown, an inverter may be added to adjust the motor rotation speed of the pump by the inverter according to the control signal of the control device 111.

In general, the booster pump device is installed in a closed or narrow place such as a basement in a building, when a user or installer wants to change or manually operate various parameters of the device, or when the booster pump device is broken. It is inconvenient to work in confined narrow space. In addition, if the booster pump device malfunctions or fails to operate, users will require a quick after-sales service, and the facility companies that need to satisfy it will have a significant manpower or time burden to manage a large number of locally dispersed devices. have.

Accordingly, the present invention provides a remote control system and a method for monitoring and controlling the operation of the booster pump by the central control server by interconnecting the booster pump control device having a communication interface with the central control server through a public telephone network. Its purpose is to.

In the system of the present invention for achieving the above object, a plurality of pumps are connected in parallel, the motor rotational speed of the pump is adjusted by an inverter, connecting the pressure tank to the discharge side of the pump, pressure sensing installed on the discharge side of the pump A booster pump apparatus comprising a control device for controlling the operation of a pump in response to a negative sensing signal, the control device having a communication interface and a modem for connecting to a public telephone network, and operating data and error data of the control device. A central control server for receiving and changing and controlling the operating conditions of the booster pump is connected to the control device through a public telephone network, and a DTMF (Dual Tone MultiFrequency) receiving panel for receiving an alarm signal when a failure of the control device occurs. It characterized in that provided in the central control server.

The method of the present invention for achieving the above object, the central control server for querying and managing the operating state of the booster pump device, the pump is connected to a plurality of pump control devices for controlling the operation of the booster pump through a public telephone network A method for remotely controlling driving, the method comprising: a step of determining whether an abnormal signal is received after a connection is completed by attempting to connect to a public telephone network from the central control server; A step 2 of inquiring and managing an operation state of the pump by entering a centralized control mode for controlling a pump device in which an abnormality is received as a result of the determination of the first step; A step 3 of investigating whether a user designates a specific pump control device when an abnormal signal is not received as a result of the determination of step 1; A fourth step of inquiring and managing the operation of the corresponding pump by entering the centralized control mode for controlling the pump control device designated by the user when there is a pump device designated by the user as a result of the step 3; And if there is no pump device designated by the user as a result of the three-stage irradiation, the pump enters into a sequential control mode for sequentially controlling each pump control device, and the remaining pump control device except for the pump control device under intensive control of the first step. Attempts to connect in order, and includes the five steps of querying and managing the operation of the connected pump.

1 is an overall configuration diagram of a booster pump remote control system according to the present invention,

Figure 2 is a network diagram of the central control server and the pump control device of the booster pump remote control system according to the present invention,

3 is a block diagram of an embodiment of the pump control device of FIG.

4 is a view showing a data communication protocol between the central control server and the pump control apparatus of FIG.

5 shows a packet structure of a data file;

6 is a view showing an abnormal state packet for informing an abnormal state of the pump;

7 is a view showing a central control screen provided by the central control server.

Explanation of symbols for the main parts of the drawings

100: central control server 101,110,120: modem

111, 121: pump control unit 112, 122: pressure tank

P1, P2, P3, P4: Pump 102,201: DTMF Receiver

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

1 is an overall configuration diagram of a booster pump remote control system according to the present invention. The central control server 100 for managing and controlling the remote booster pump is connected to the public telephone network through the modem 101. Control devices (111, 121) for respectively controlling the booster pump device located in a plurality of pump locations are equipped with a modem (110, 120), connected to the public telephone network by the connection request of the central control server 100, the central control server (100). The central control server 100 transmits various request messages and setting data messages to each booster pump control device 111 and 121, and the booster pump control device analyzes the request message and transmits the corresponding response message to the central control server 100. And various set values of the pump according to the set data message. In addition, the central control server 100 is provided with a DTMF receiving panel 102 for receiving the alarm signal transmitted by the control device (111, 121) when the pump failure occurs. When the booster pump control device (111, 121) detects an abnormal condition of the pump, it immediately dials the DTMF receiver 102 to inform the central control server of the abnormality, and immediately stops the site that is currently being controlled after confirming the abnormality in the central control server. And control the abnormal pump. The modem may be an external or internal modem.

Figure 2 is a network diagram of the central control server and the pump control apparatus of the booster pump remote control system according to the present invention.

The central control server 200 is composed of a mouse, a printer, a two-line modem and a DTMF signal board 201 in a personal computer. The first modem 202 of the two-line modem is used for sequential control, and the second modem ( 203) is used for centralized control. Therefore, the central control server may be provided with at least three communication lines for sequential control and centralized control.

Here, the sequential control is to collect and manage data by accessing the telephone line (first modem) to each control device in sequence from the central control server. The centralized control is to collect and manage data by directly connecting to a specific pump control device by a separate telephone line (second modem) in the central control server. For example, when a user designates a specific pump or the DTMF signal board 201 is used. In case of receiving an error signal through the centralized control.

The reason why the sequential control and the intensive control are performed in this way is that if you want to immediately check the status of a specific pump during general sequential polling, you will not be able to connect to other pumps during that time. This is to solve the problem of delaying the overall connection time in the worst case until the central control server obtains the information on the abnormal pump when the controllers are connected in sequence when the quantity of the control device is large.

In the sequential control, the pump currently under intensive control is excluded from the inquiry list, and the inquiry order may be adjusted so that the pump received abnormally through the DTMF receiving panel 201 is inquired in the next order. In addition, when an abnormal occurrence signal is received from another pump even during the concentration control system designated by the user, control of the designated pump of the user is immediately stopped, and the abnormally received pump is automatically connected and concentrated control.

In the case where several pump apparatuses with individual control apparatuses are installed in the pumping station, as shown in FIG. 2, a regional network is formed. That is, each control device is interconnected via a fieldbus, and among them, the first control device 251 having a modem 250 is the main controller, and the other control devices 252 and 253 are subordinately controlled. As a device, the main controller can be configured to relay communication of other control devices. This network configuration is to solve the disadvantage that the installation cost of the modem and telephone line is significantly increased if the public telephone line is installed in each control device.

The configuration and function of the control device will be described with reference to FIG. 3 in order to facilitate understanding of the present invention. As shown in FIG. 3, the control device includes a first memory 20, a signal conditioner 21, an A / D converter 22, a second memory 23, and a man-machine interface 24. Hereinafter referred to as MMI), processing unit 25 (CPU), D / A converter 26, display unit 27, signal input / output unit 28, real time clock unit 29, and serial interface 30. do. The signal input / output unit 28 includes a digital input unit 28-1, a digital output unit 28-2, an analog output unit 28-3, and an analog input unit 28-4.

The first memory 20 may include a control program of the control system and may be implemented as a type of read only memory (ROM). The control program performs, for example, a function of controlling to maintain a constant discharge pressure even with a change in water supply amount, an alternate operation function for making the operation time of a plurality of pumps uniform, a reservation function for setting the operation time, and the like.

The signal conditioner 21 receives the current conditions and error conditions of various components including the plurality of pumps P1 to P4 of the booster pump device, an inverter (not shown), and a pressure detector (not shown) as digital signals. Output to the digital input unit 28-1. The digital input includes, for example, a power supply abnormal signal, a discharge side abnormal high pressure signal, a suction side low water level signal, a fluid abnormal low temperature / high temperature signal, an abnormal signal of each pump, an inverter abnormal signal, a remote operation control signal, and the like.

The A / D converter 22 receives the pressure value of the pressure sensing unit and the frequency of the inverter as an analog signal, converts the digital signal into a digital signal, and outputs the digital signal to the analog input unit 28-4. Analog inputs include, for example, current discharge pressure values, remotely set pressure values, current consumption current values, current inverter frequencies, and the like.

The second memory 23 transmits the output signal of the signal conditioner 21 and the output signal of the A / D converter 22 through the digital input unit 28-1 and the analog input unit 28-4, respectively. Provide and record the operation status and error status of various elements. The second memory 23 may be implemented with a memory device such as a random access memory (RAM). The second memory 23 records operation data (for example, operation time of each pump) for a predetermined period and the state of the device when an abnormality occurs. It can be stored and then read the contents to monitor the operation status and can provide accurate A / S information. In addition, the integration time of the main parts is maintained so that the replacement time of the main parts can be predicted in advance.

The MMI 24 is implemented as a kind of keypad for receiving user setting data and a light emitting diode (LED) for informing a user of an operation state or an error warning of a system.

The processor 25 is connected to the first memory 20 and the second memory 23 by a system bus B1, and controls and displays a control signal for controlling an operation state of various components of the booster pump device and the control device. Outputs an information signal for. The processor 25 may be implemented with an 80C188XL 16-bit C-MOS microprocessor.

The D / A converter 26 converts the control signal from the processor 25 into an analog signal and outputs the analog signal to the analog output unit 28-3. The analog output includes, for example, an inverter frequency control signal, a current pressure value display signal, a current operation amount display signal, and the like.

The display unit 27 displays an information signal from the processor 25 and may be implemented as an LCD (liquid crystal display) having a type of Korean display function.

The real time clock unit 29 plays the role of a clock that is the basis for managing the exact time point at the time of occurrence of an abnormality and calculating the operation time of the main parts.

The serial interface 30 may be implemented as RS-422 / 485 for connecting to a public telephone network as a communication interface for remote communication.

Now, a communication protocol between the pump control apparatus and the central control server of FIG. 3 will be described.

It is necessary to make a telephone call to each pump control unit from the central control server. For example, a minimum connection time of 30 to 40 seconds (time for matching communication protocols between modems) is required. As a result, in order to remotely control a plurality of pump stations, it takes at least {telephone lines × (minimum connection time + communication time)} to connect each pump station once in sequence. Since this connection time is determined according to standardized communication protocol and cannot be reduced, it is necessary to maximize communication speed in order to reduce sequential inquiry time and to exchange maximum data in one connection. Therefore, the modem is capable of high-speed communication, and the communication data protocol also takes a binary data format rather than a general ASCII format to reduce the amount of data.

When the request message of the predetermined format is transmitted from the central control server side, the request is made in a request / response manner in which the pump control unit transmits a response message for the command, and the request / response message is exchanged in the form of a data file. As shown in Fig. 4, the central control server immediately sends a connection request message (REQ.CON) to the pump control device after confirming the modem connection, and the control device receives the connection confirmation message (ACK.CON) from the server. To confirm the connection. In this way, the status request message (REQ.SAT) and the status response message (REP.SAT) requesting the operating state of the pump, the data request message (REQ.DAT) and the data requesting various set values required in the inquiry mode. Transmission message (REP.DAT), control request message (REQ.CTR) for transmitting various set values for remote control, control confirmation message (ACK.CTR), and disconnection message (REQ.DCN) requesting connection termination. ) And disconnection confirmation message (ACK.DCN) are exchanged.

In this case, a cyclic redundancy code (CRC) may be used to detect data corruption due to noise of a public telephone line or other environmental causes, and a plurality of error detection schemes may be performed in parallel. If the receiving side detects corruption of the received data, the transmitting side requests retransmission, and the transmitting side proceeds by retransmitting.

In addition, in order to minimize the decrease in communication speed, a method of cutting a data file into packets and transmitting the packet may be adopted.

As shown in FIG. 5, the packet structure includes a synchronization signal SYN, a packet header SOH, a packet number PN, a packet length PL, a data field length DLEN, a text start (STX), and a data field (SX). DATA), an error detection code (CRC), and a transmission termination character (EOT).

The message requested by the central control server is displayed in the data field area of FIG. 5, which includes a modem connection request, a control command request, a current status request, a set value inquiry request, a set value transmission request, an operation record inquiry request, and an operation record. There are deletion request, time setting request, communication variable inquiry request, and communication setting variable transmission request. There are connection termination request, continuous status request, and continuous status stop request when driving record inquiry. The pump control device transmits a response message corresponding to each request message, and if a communication error or frame is destroyed, sends a negative response message to request retransmission.

In addition, data packets that are allowed in fieldbus communication between a main controller and a number of slave controllers in the pumping station are: control request, status request, setpoint inquiry request, setpoint transfer, record query, record delete, continuous state. Packets relating to the request, the continuation stop, and the time setting request and their response packets are exchanged, and their packet types are the same as those of the data field format used in the main controller of FIG. 5, but the identifier for identifying the slave controller (SBID). ) Is specified. In addition, the slave controller identifier is not specified in the time setting request packet and is transmitted by broadcasting.

6 is a packet structure diagram for notifying a pump abnormal state in the pump control apparatus. The abnormal status packet includes an identifier (SID) of the main control unit for identifying the pump position of the region, an identification code code (IDCC) that encrypts the SID to secure the SID, and a telephone number for notifying an abnormality in the region. MTN), reporting code (CC) indicating whether an abnormality has occurred, identifier of slave controller (SBID), operation status of pump of slave controller (SBS), current time of pump controller (CTIME), pump device It includes status data (STATUS) related to various set values and current operation output values. Status data (STATUS) includes contact input status, discharge pressure, remote pressure setpoint, inverter control output, current pressure, current operation volume, pump operation (manual start / inverter start / stop), set pressure, remote setting, currently running inverter Displays the operation amount of the pump, motor / inverter, and current error status.

The central control program built on the central control server allows the operator to centrally control the desired pumping station and the function to create and print a report on year, month, and weekly information, modem port or communication. Perform environment setting functions such as speed, help function, etc.

7 is a view showing a central control screen provided by the central control server. The central control screen has three child windows in the main window using the multiple document interface (MDI), and the upper window shows the location of each pumping station and abnormal status of the pumping station along with a map. It is displayed differently as color. The lower left window shows the 'communication status' of the currently connected pump station, and the lower right window shows the 'abnormal signal' of the pump station with the abnormality (high pressure abnormality occurred in No. 1 pump station No. 1). When an error occurs, an inquiry screen for inquiring the abnormal pump is automatically popped up. If an error occurs in one or more pump stations, the location of the error and its details are recorded in the error signal window.

If a problem occurs in any pump in the pump station or if a user-selected pump station is selected with the mouse, a dial box for inquiring the individual operation status of the pump or controlling the abnormality is displayed. In the operation status inquiry of the individual pump, the set pressure and the current pressure are displayed, the operation status and the abnormal status can be inquired, and the operation conditions of the pump can be set. In the setting dial box, power failure reset, automatic switching, pressure control, setting pressure, upper limit pressure, proportional constant, derivative time, integral time, remote control, etc. are inputted. Inquiry dial box can search the operation record of each pump in pump station individually and can search the operation status, pump status and abnormal status. The operation record screen displays the sequence number, pressure, inverter output, date, time, operated pumps, etc.The pump record inquiry screen displays the number of running cycles and operating hours for each pump, and the fault record inquiry screen displays the order of the time when an error occurred. Error record number, time of occurrence, type of error, current operation amount, current pressure and operation status of each pump are displayed.

With the Windows-based central control program that performs the above functions, the user can collect various data of each control device and perform remote control accordingly.

As described above, the present invention performs a sequential control and centralized control of a plurality of pump stations in the remote control at the central control server side, and by allowing the abnormal control pump device to automatically notify the central control server, faster inquiry and control Can be performed. In addition, the central control server is equipped with a Windows-based administrator program to collect and remotely control various data of the pump device with a simple operation.

Claims (5)

A plurality of pumps are connected in parallel between the suction pipe and the discharge pipe, the pressure tank and the pressure sensing unit is installed on the discharge side of the pump, and controls the operation of the pump to be adjusted by the inverter in accordance with the detection signal of the pressure sensing unit A booster pump device comprising a control device, The control device includes a communication interface and a modem for connecting to a public telephone network, and receives the operation data and error data of the control device according to a user's operation command, and changes and controls the operation conditions of the pump. The control server is connected to the control device through a public telephone network, and the central control server is equipped with a DTMF receiving panel for receiving an alarm signal when an abnormality occurs in the control device. Control system. The apparatus of claim 1, wherein the central control server comprises: a first modem for controlling an abnormal pump device corresponding to a transmitting side of an abnormal occurrence signal received by the DTMF receiving panel, and a plurality of normal pump devices; Booster pump remote control system using a public telephone network, characterized in that it comprises a modem. The booster pump remote control system using a public telephone network according to claim 2, wherein the first modem is used to control a pump device designated by a user when no abnormal pump is generated. The pump control apparatus according to claim 1, wherein when a plurality of booster pump apparatuses are provided with respective pump control apparatuses at one place, any one of the plurality of pump control apparatuses is connected to a public telephone network as a main control apparatus, and the other pump control apparatuses Booster pump remote control system using a public telephone network, characterized in that the main control device and the slave control device is connected to the public telephone network through the main control device, the main control device and the slave control device is connected to the fieldbus. The central control server for querying and managing the operation status of the booster pump device is connected to a plurality of pump control devices for controlling the operation of the booster pump through a public telephone network to remotely control the operation of the pump, Step 1, by the central control server, attempting to connect with a public telephone network and determining whether an abnormal signal has been received after the connection is completed; A step 2 of inquiring and managing an operation state of the pump by entering a centralized control mode for controlling a pump device in which an abnormality is received as a result of the determination of the first step; A step 3 of investigating whether a user designates a specific pump control device when an abnormal signal is not received as a result of the determination of step 1; A fourth step of inquiring and managing the operation of the corresponding pump by entering the centralized control mode for controlling the pump control device designated by the user when there is a pump device designated by the user as a result of the step 3; And If there is no pump device designated by the user as a result of the step 3, the pump enters the sequential control mode for sequentially controlling each pump control device, and the remaining pump control device except for the pump control device under intensive control of the first step. A booster pump remote control method using a public telephone network, comprising five steps of attempting to connect in order and inquiring and managing the operation of the connected pump.