KR100801579B1 - Control system for production of remicon - Google Patents

Abstract

The present invention relates to a ready-mixed concrete production control system, and more particularly, in a control system for producing ready-mixed concrete by measuring and mixing concrete materials, the communication between the PLC control module and the control panel module converts the contact signal into the contact data to communicate the data bus. Since the wiring between PLC control module and control panel module is simply composed of bus cables, it is easy and cheap for wiring work and maintenance, and the expansion contact composed of circuit is formed on the control panel module. An easy-to-expand and inexpensive ready-mixed concrete production control system.

The ready-mixed concrete production control system according to the present invention, in the ready-mixed concrete production control system for controlling the ready-mixed concrete production equipment for measuring and mixing the concrete material, generating an analog signal by sensing the weight of each concrete material to be dropped A weight sensing means, an input unit for receiving and receiving an analog signal transmitted from the weight sensing means, an A / D converter for converting the received analog signal into a digital signal, and a communication unit for transmitting and receiving data. Central processing provided with an A / D conversion module, a communication unit for transmitting and receiving data, a calculation unit for receiving a signal transmitted from the A / D conversion module, calculating a discharge amount of concrete material, and a display unit for displaying data. Module, input unit for inputting control contact signal, contact signal and contact signal Input / output signal processing unit for switching contact data corresponding to each other, a communication unit for transmitting and receiving data, a display unit for displaying a contact signal, and a contact signal generated from an external signal generator An input terminal unit for outputting, an output terminal unit for outputting a contact signal to an external actuator, an input / output signal processing unit for switching contact data corresponding to each of the contact signal and the contact signal, a communication unit for transmitting and receiving data, and a contact signal And a power supply module for supplying power to each of the modules and the external actuator.

Ready-mixed concrete

Description

Ready-mixed concrete production control system {CONTROL SYSTEM FOR PRODUCTION OF REMICON}

1 is a block diagram showing a ready-mixed concrete production control system according to an embodiment of the present invention

Figure 2 is a block diagram showing the configuration of the ready-mixed concrete production control system according to an embodiment of the present invention

<Short description of the major reference symbols>

22 A / D conversion module

221 input

222 amplifier

223 A / D converter

223 Communications

23 Central Processing Module

231 calculation unit

232 display

233 Communications

24 Control Panel Module

241 input

242 display

243 I / O signal processor

244 Communication

25 PLC Control Module

251 Central Processing Unit

252 Input Terminal

253 output terminal

254 I / O signal processor

255 communication unit

26 Power Supply Module

261 Current measuring unit

262 A / D converter

263 Communications

264 Power Supply

27 Lightning Protection Circuit Module

L1, L2, L3, L4 Weight sensing means

S1, S2, S3, S4 Signal Generator

C1, C2, C3, C4, M1, M2 actuator

The present invention relates to a ready-mixed concrete production control system, and more particularly, in a control system for producing ready-mixed concrete by measuring and mixing concrete materials, the communication between the PLC control module and the control panel module converts the contact signal into the contact data to communicate the data bus. Since the wiring between PLC control module and control panel module is simply composed of bus cables, it is easy and cheap for wiring work and maintenance, and the expansion contact composed of circuit is formed on the control panel module. An easy-to-expand and inexpensive ready-mixed concrete production control system.

Ready mixed concrete (REMICON), which is used in large quantities in construction and civil works, is shipped with ready-mixed concrete at ready-mixed concrete production facilities according to the ordered mix ratio. The ready-mixed concrete production equipment weighs the weight of concrete material to be added to the mixing ratio of concrete materials such as gravel, sand, cement, water, etc. Mix it. The mixing of the concrete material is made by a ready-mixed concrete production control system, which measures the weight of the concrete material injected by a weight sensing means such as a load cell, and the hopper gate according to the signal measured by the weight sensing means. By controlling the opening and closing operation of the.

In general, the ready-mixed concrete production control system includes an input signal from the weight sensing means and an output signal for the operation of an external actuator such as a gate, a mixer, a conveyor transport device, and the like. It is input and output through and processed. Therefore, in the conventional ready-mixed concrete production control system, the wiring corresponding to each one of the input / output terminals provided in the input / output terminal part of the PLC is made. In addition, the conventional ready-mixed concrete production control system is a one-to-one correspondence between the contact point contact between the control panel and the PLC having an input and output contact for inputting a control command and output the status of the various devices of the process. Accordingly, the conventional ready-mixed concrete production control system is very difficult to install and repair due to the complicated wiring. In addition, the input / output terminal part of the PLC is provided with a limited input / output terminal and its expandability is inferior, and has an disadvantage of additionally installing an input / output slot in a separate input / output terminal part when the contact is expanded.

Meanwhile, in the ready-mixed concrete production control system, a signal is transmitted from a weight sensing means installed in a yard where concrete material is piled up to a central processing module or a PLC far from the weight sensing means, and then to an A / D conversion means provided in the central processing module or PLC. Is converted into a digital signal and processed. Therefore, in the conventional ready-mixed concrete production control system, the wiring which wires from the weight sensing means to the A / D conversion means provided in PLC etc. becomes long. In particular, since the weight sensing means is provided for each concrete material, the wiring from the weight sensing means is composed of several wires. Therefore, in the conventional ready-mixed concrete production control system, not only noise is generated in the signal transmitted from the weight sensing means, but wiring is complicated, and thus, it is difficult to install and maintain.

In addition, in the ready-mixed concrete production control system, signals generated from signal generators such as proximity sensors for detecting the state of various devices such as cylinder positions for operating gates in a yard, cylinders or motors, etc. It is inputted confidently. By the way, the signal generator is mainly installed in the outdoor, such as a yard, a passage through which an overcurrent caused by lightning strikes. Therefore, the overcurrent due to the lightning inputted through the signal generator flows into the input terminal portion of the PLC, thereby causing a problem such that the PLC is damaged.

The present invention was conceived by recognizing the above points, an object of the present invention is to communicate by the PLC control module and the control panel module is made by converting the contact signal to the contact data capable of data communication, such as data bus communication The company aims to provide ready-mixed concrete production control systems that are easy to install and maintain by increasing speed and simplifying wiring.

In addition, another object of the present invention is to provide a ready-mixed concrete production control system is easy to expand the contact is formed by a programmable circuit in the control panel module.

In addition, another object of the present invention is to convert the signal sensed by the weight sensing means to digital by the A / D conversion module to transmit to Ethernet communication to reduce noise as well as simplify the wiring and installation and maintenance It is to provide a simple ready-mixed concrete production control system.

In addition, another object of the present invention is to provide a ready-mixed concrete production control system that can prevent the overcurrent caused by lightning strikes the PLC by damaging the control system by installing a lightning protection module on the wiring connected to the input terminal of the PLC. .

In order to achieve the above object, the ready-mixed concrete production control system according to the present invention, in the ready-mixed concrete production control system for controlling the ready-mixed concrete production equipment for producing ready-mixed concrete material by weighing and mixing each of the concrete materials to be dropped Weight sensing means for sensing the weight to generate an analog signal, an input unit for receiving and receiving an analog signal transmitted from the weight sensing means, an A / D converter for converting the received analog signal into a digital signal, and data A / D conversion module with a communication unit for transmitting and receiving, a communication unit for transmitting and receiving data, a calculation unit for receiving the signal transmitted from the A / D conversion module to calculate the amount of concrete material discharge, and displays data A central processing module provided with a display unit for inputting the control contact signal A control panel module including an input unit, an input / output signal processing unit for switching contact data corresponding to each of the contact signal and the contact signal, a communication unit for transmitting and receiving data, a display unit for displaying the contact signal, and an external signal An input terminal unit for inputting a contact signal generated from a generator, an output terminal unit for outputting a contact signal to an external actuator, an input / output signal processing unit for switching contact data corresponding to each of the contact signal and the contact signal, and data And a PLC control module including a communication unit for transmitting and receiving a signal, a central processing unit for arithmetic processing of a contact signal, and a power supply module for supplying power to each module and an external actuator.

In addition, the ready-mixed concrete production control system according to the present invention, the data transmission and reception between the communication unit of the A / D conversion module and the central processing module is characterized in that the Ethernet communication.

In addition, the ready-mixed concrete production control system according to the present invention, the power supply module has a current measuring unit for measuring the current of the power supplied to each module and the external actuator, and A / for converting the measured current value into a digital signal And a communication unit for transmitting a current value converted into digital data to the central processing module, wherein the central processing module displays the input current value on a display unit.

In addition, the ready-mixed concrete production control system according to the present invention is characterized in that the lightning protection circuit module for blocking the input current due to lightning between the signal generator and the input terminal of the PLC control module is further provided.

In addition, the ready-mixed concrete production control system according to the present invention, the lightning protection circuit module is characterized in that the lightning arrester or a poly switch is provided.

Hereinafter, with reference to the embodiment shown in the drawings will be described in detail the ready-mixed concrete production control system according to the present invention.

1 is a block diagram showing a ready-mixed concrete production control system according to an embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a ready-mixed concrete production control system according to an embodiment of the present invention.

The present invention is to control the ready-mixed concrete production equipment for producing ready-mixed concrete by weighing and mixing concrete materials, referring to the drawing, the ready-mixed concrete production control system according to the present invention is a weight sensing means (L1 ~ L4), A / D It comprises a conversion module 22, a central processing module 23, a control panel module 24, a PLC control module 25, a power supply module 26 and a lightning protection circuit module 27.

The weight detection means (L1 ~ L4) generates an analog signal by sensing the weight of each concrete material to be dropped from the main hopper (11a, 11b, 11c, 11d), which is accommodated in sand, gravel, cement, water and the like. Weight sensing means (L1 ~ L4) is composed of a weight sensor, such as a load cell (Load Cell) for generating a current having a proportional or constant correlation with the concrete material. The concrete material measured by the weight sensing means L1 to L2 is dropped from the main hoppers 11a, 11b, 11c, and 11d into the auxiliary hoppers 12a, 12b, 12c, and 12d, and mixed or conveyed by the conveyor shown in the drawing. Conveyed by the device 14 or the like.

The A / D conversion module 22 is for receiving an analog signal transmitted from the weight sensing means (L1 ~ L2) to convert to a digital signal to transmit to the central processing module (23). Referring to the drawings, the A / D conversion module 22 includes an input unit 221 for receiving an analog signal from the weight sensing means L1 to L4, and an amplifying unit 222 for amplifying the input analog signal. And an A / D converter 223 for converting the amplified analog signal into a digital signal, and a communication unit 224 for transmitting the converted digital signal in an Ethernet communication method. In the present invention, the signal detected by each of the weight detection means (L1 ~ L4) is converted into a digital signal by the A / D conversion module 22 is transmitted via Ethernet communication. Therefore, in the present invention, the wiring is not made in one-to-one correspondence with each of the weight sensing means L1 to L4, but is simply made of one Ethernet line. On the other hand, the weight of the concrete material detected by the weight sensing means (L1 ~ L4) has a great impact on the quality of the ready-mixed concrete. Therefore, the reduction of noise is very important in the transmission of the signal detected from the weight sensing means (L1 ~ L4). The present invention can minimize the generation of noise by converting the signal sensed from the weight sensing means (L1 ~ L4) as a digital signal as described above by transmitting in an Ethernet communication method using RS232C communication.

The central processing module 23 receives a signal transmitted from the A / D conversion module 22 by an Ethernet communication method, calculates a discharge amount of concrete material, and sends the calculated data to the PLC control module 25. do. Referring to the drawings, the central processing module 23 includes a communication unit 233 for transmitting and receiving data to and from the A / D conversion module 22 and the PLC control module 25, and the A / D conversion module 22. A calculation unit 231 for receiving the transmitted signal to calculate the discharge amount of the concrete material and a display unit 232 such as a monitor for displaying the received or calculated data are provided.

Meanwhile, the central processing module 23 is connected to other computers 31 and 32 via the network 3.

The control panel module 24 monitors all or part of a signal input by an input device such as a button 24a or a touch screen, or all or part of a signal received from the PLC control module 25. It is for displaying on the display device as shown in 24b) and for sending the control signal inputted by the input device to the PLC control module 25. Referring to the drawings, the control module 24 is for inputting a control contact signal, the input unit 241 comprising an input device such as a button 24a or a touch screen, and a contact corresponding to each of the contact signal and the contact signal. An input / output signal processing unit 243 for switching data with each other, a communication unit 244 for transmitting and receiving data, and a display unit 242 composed of a display device such as a monitor or LED lamp 24b for displaying a contact signal. It is provided is provided. The control panel module 24 transmits the contact signal inputted or inputted to the input unit 241 to the PLC control module 25, and receives the contact signal transmitted from the PLC control module 25. As described above, the transmission and reception of each of the contact signals is conventionally made through a wire corresponding to each of the contact signals. That is, conventionally, the wiring is made in parallel by the number of contact signals between the control panel module 24 and the PLC control module 25. The present invention converts parallel contact signals into contact data capable of data communication, transmits and receives data through a data communication bus configured in 8Bit or 32Bit units, and converts the received contact data back into contact signals to be processed or displayed in a PLC logic circuit. And outputting. That is, the contact signal is converted into contact data corresponding to each of the contact signals by the input / output signal processing unit 243 of the control panel module 24 and transmitted to the PLC control module 25 through the communication unit 244. Contact data serially transmitted from the PLC control module 25 and received by the communication unit 244 is converted into a contact signal by the input / output signal processing unit 243 to be processed or displayed. Such contact data includes information about a contact such as a contact state such as On-Off of the contact, an address (number) of the contact, and the like. For example, the contact signal generated from the signal generator for detecting whether the gate is opened or closed is converted into contact data in 8-bit or 32-bit units containing information such as an address assigned to the contact signal, an active state of the contact signal, and the like.

On the other hand, the present invention is not physically formed so that the contact point in the control panel module 24 to have a one-to-one correspondence to each of the contacts, but is formed by a logic circuit such as a programmable logic device (PLD) IC. Accordingly, the control panel module 24 can be simply configured to have a sufficient expansion contact by the logic circuit. Accordingly, it is not necessary to additionally install an expansion slot having a contact by using an expansion contact composed of a logic circuit when the contact is expanded.

The PLC control module 25 processes signals and data received through the input terminal unit 252 and signals and data received through the communication unit 255, and outputs them to the outside through the output terminal unit 253 and through the communication unit 255. It is for external transmission. Referring to the drawings, the PLC control module 25 includes an input terminal 252 for inputting a contact signal generated from external signal generators S1 to S4 such as a sensor, a cylinder C1 to C4 or a motor ( An output terminal unit 253 for outputting a contact signal for operating the actuator by an external actuator such as M1, M2, and an input / output signal processing unit 254 for switching the contact data corresponding to each of the contact signal and the contact signal. ), A communication unit 255 for transmitting and receiving data to and from the central processing module 23 and transmitting and receiving contact data with the control panel module 24 through a data bus communication, and a central processing unit 251 for performing logical operation processing of the contact signal. ) Is provided and configured. The input / output signal processing unit 254 of the PLC control module 25 converts the contact data corresponding to each of the contact signals and contacts the contact data received by being serially transmitted from the PLC control module 25 through the communication unit 244. Switch to the signal. Accordingly, since the contact signal is communicated between the control panel module 24 and the PLC control module 25 in a contact data state capable of serial communication, the wiring is simplified and the signal transmission speed is increased.

The power supply module 26 is for supplying power to each module and an external actuator, and is provided with a power supply unit 264 for distributing and supplying power to each module. In particular, the present invention is a current measuring unit 261 for measuring the current of the power supplied by the power supply unit 264, and A / D conversion unit 262 for converting the measured current value into a digital signal and The communication unit 263 is configured to transmit the current value 263 converted into digital data to the central processing module 22. Accordingly, the present invention not only determines whether the operation of each device is abnormal by the central processing module 22 using current data, but also enables arithmetic processing for control. In particular, the current value converted into digital data as described above is easily displayed on the display unit 232 of the central processing module 22.

The lightning protection circuit module 27 is for preventing an overcurrent caused by a lightning strike along the wiring input from the external signal generators S1 to S4 to the input terminal unit 252 of the PLC control module 25. . Referring to the drawings, the lightning protection circuit module 27 is installed between the signal generator (S1 ~ S4) and the input terminal portion 252 of the PLC control module 25. Lightning protection circuit module 27 as described above is provided with a lightning arrester (arrestor, Arrestor) or a poly switch (Poly Switch).

In the drawings, reference numeral B shows a ready-mixed vehicle for carrying the ready-mixed concrete.

The ready-mixed concrete production control system according to the present invention by the configuration as described above is to communicate between the PLC control module and the control panel module by converting the parallel contact signal to serial data to improve the communication speed and simplify the wiring and installation and maintenance Not only is it easy to expand, but also has the advantage of easy expansion of the contact point.

In addition, the ready-mixed concrete production control system according to the present invention can reduce the noise by converting the signal detected by the weight sensing means to digital and transmit to Ethernet communication, as well as has the advantage of simple installation and maintenance.

In addition, the ready-mixed concrete production control system according to the present invention has an advantage of preventing the damage to the control system due to the inflow of lightning current by installing a lightning protection module in the wiring connected to the input terminal of the PLC control module.

The ready-mixed concrete production control system described above and illustrated in the drawings is only one embodiment for implementing the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.

Claims (5)

delete delete In the ready-mixed concrete production control system for controlling the ready-mixed concrete production equipment for weighing and mixing concrete materials, Weight sensing means for sensing the weight of each concrete material to be dropped and generating an analog signal; A / D conversion module provided with an input unit for receiving and receiving an analog signal transmitted from the weight sensing means, an A / D converter for converting the received analog signal into a digital signal, and a communication unit for transmitting and receiving data. and; A central processing module including a communication unit for transmitting and receiving data, a calculation unit for receiving a signal transmitted from the A / D conversion module, calculating a discharge amount of concrete material, and a display unit for displaying data; A control panel including an input unit for inputting a control contact signal, an input / output signal processing unit for switching contact data corresponding to each of the contact signal and the contact signal, a communication unit for transmitting and receiving data, and a display unit for displaying the contact signal. A module; An input terminal unit for inputting a contact signal generated from an external signal generator, an output terminal unit for outputting a contact signal to an external actuator, and an input / output signal processing unit for switching contact data corresponding to each of the contact signal and the contact signal And a PLC control module including a communication unit for transmitting and receiving data and a central processing unit for calculating and processing a contact signal; Including a power supply module for supplying power to each module and the external actuator, Data transmission and reception between the communication unit of the A / D conversion module and the communication unit of the central processing module is made by Ethernet communication, The power supply module includes a current measuring unit for measuring a current of power supplied to each module and an external actuator, an A / D converter for converting a measured current value into a digital signal, and a current converted into digital data. Communication unit for transmitting a value to the central processing module is provided, The central processing module is a ready-mixed concrete production control system, characterized in that for displaying the input current value. The method of claim 3, And a lightning protection circuit module is further provided between the signal generator and the input terminal of the PLC control module to block an input current caused by a lightning strike. The method of claim 4, wherein The lightning protection circuit module ready-mixed concrete production control system characterized in that the lightning arrester or a poly switch is provided.

Images