International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
Design of ARM Based Data Acquisition and Control System for Engine Assembly Monitoring Veena Chitte1, Manjusha Joshi2, Nilesh Kumbhar3 1MTech,
Dept. of Industrial automation Engineering, MPSTME, Maharashtra, India Dept. of Electronics &Tele-Communication Engineering, MPSTME, Maharashtra, India 3Sr.Manager, Manufacturing Engineering, Greaves Cotton Ltd., Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Professor,
Abstract – For any engine to work properly with minimum
maintenance, its assembly quality plays important role. This is accomplished by introducing industrial automation techniques in complex assembly operations of engines. ARM based data acquisition system presented here is an intelligent unit based on embedded technology for data acquisition, monitoring & output control. The system is used with DC Nutrunner (an assembly tool for fastening the bolts) to control the assembly process torque value by giving the value as OK or NOK. Compared with conventional solutions to control and data acquisition, the device based on embedded system gives more features with flexibility and ease of installation in low cost. Ethernet module interfaced with ARM is used to achieve networked control and acquisitions through TCP/IP communication protocol in an industry.
Microcontroller can communicate with serial data acquisition equipments at the terminal through SPI interface and can transmit data to remote host computer through Ethernet interface. Compared with the method, the conventional Distributed Control System (DCS) is too complicate. The Field bus technique made the industry control system simple, but the application of Field bus has been limited due to the high cost of hardware and the difficulty in interfacing with multivendor products [6]. The computer network technology, especially Ethernet, is being adopted by the industrial automation field [7]. With the use of Ethernet and embedded technique at low level of factory automation, a more flexible and convenient way for distributed control and data acquisition systems come to reality.
Key Words: ARM7, Ethernet, TCP/IP, SPI, Data Acquisition
2. SYSTEM OVERVIEW
1. INTRODUCTION
Many embedded systems have substantially different designs according to their functions and utilities. There is no single characterization for all kinds of embedded systems. Processor based real-time embedded systems are playing an important role in most control applications. An embedded system interacts continuously with its environment and carries out various tasks with certain timing constraints to meet the requirements of system performance [9]. The processor has the dominant influence on an embedded system. The control and acquisition system uses ARM7 LPC2148 16/32-bit RISC microcontroller which is based on a 16-bit/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, that combine microcontroller with embedded high-speed flash memory ranging from 32 kB to 512 kB. A modular design approach is used in the system design. The main modules of the system are Processor module, Ethernet module, UART interface, MMC card. The block diagram of the proposed system is shown in the fig.1
With the development of network technology and communication technology, the need that industrial control can be completed via network has become a trend. In traditional industrial control system or data acquisition system, the structure that one host connects multiple serial devices through multiport serial cards is adopted. The task of host is to communicate with each serial device, process data and interact between the operator and computer. This structure is feasible in the case of fewer devices, lower transmission rate. But when a host needs to connect more serial devices at the same time with higher transmission rate and the data processing is more complex, the system performance is poor. In addition, these serial devices connect the same host may be geographically far and this will increase the length of wiring and drop communication quality. So a solution need be found to realize the communication between industrial control devices and Ethernet. As the embedded system itself has the performance of network and human-computer interaction, it is possible that the embedded system replaces the previous control method based on microcontroller. So an ARM processor based embedded Ethernet interface system is designed. This microcontroller based data acquisition system consist of assembly tools (DC Nutrunner), embedded control panel, client PC and server PC. The introduced Philip’s ARM7 TDMI LPC2148 16/32-bit RISC
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The processor module is connected to Desautter machine through RS232 by UART interface, whereas DC Nutrunner is connected through inbuilt Ethernet port. LCD is connected to the general purpose input/output ports (GPIO) of the ARM. It is used to display the information like status lower computers can’t deal with. So the smart processor can greatly optimize the controller’s performance.
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