Arm based human machine interface of plastic extrusion blow molding system

IJRET: International Journal of Research in Engineering and Technology ISSN: 2319-1163
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Volume: 02 Issue: 04 | Apr-2013, Available @ http://www.ijret.org 650
ARM BASED HUMAN MACHINE INTERFACE OF PLASTIC
EXTRUSION BLOW MOLDING SYSTEM
Archana Ashok More1
, R. T. Patil2
1
Student, 2
Associate Professor, Electronics &Telecomm dept., R.I.T.Sakhrale, Maharashtra, India,
morearchana24@gmail.com, rameshpatil@ritindia.edu
Abstract
This paper designs monitoring and controlling parameters of Plastic Extrusion Blow molding system. This system takes ARM
processor as a core and takes CAN bus as communication system by analyzing the human machine interface system. In this Hardware
design consist of LPC2138 with ARM7 microprocessor having large memory capacity and CAN communication as Human machine
interface control device. In software design Embedded C is transplanted to the ARM core to achieve real time multi task switching.
Secondly, GUI is transplanted to display graphics & text. Write the HMI application program task-unit.
Finally LPC 2138 communicates to human machine interface system with CAN bus and HMI of the Plastic Extrusion blow molding
system is completed.
Index Terms: Human Machine Interface (HMI), LPC2138, CAN bus (controller Area Network) GUI (Graphical User
Interface)
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I. INTRODUCTION
Now days we are using many Networked embedded systems
for monitoring and control the industrial devices. With the
scalable networking solution The server enables Web access
to
Distributed measurement control systems and provides
optimization for educational laboratories, instrumentation,
Industrial and home automation. In this paper, we present the
principles and to design a system for Plastic Extrusion blow
molding system and control by using Advanced RISC
Machine i.e. ARM processor and in-build web server
application. The main core of the system is an embedded
hardware running on a µc OS, a industrial grade RTOS for
hard time applications.
Plastics are widely used in industry as one of the basic
material comparing with other materials, plastics have many
advantages i.e. Lighter weight, easier processing and better
mechanical and chemical properties. Molding is one of the
most important manufacturing Processes which are capable of
mass producing complicated plastics parts with excellent
precision.
Now days plastic blow molding machine technology
developed rapidly, which makes more and more requirements
to human-machine interface of plastic blow molding machine
equipped in the field of industrial control. So new style
automation equipped with embedded ARM as core to control,
CAN bus as the communication network in order to meet
requirements of human machine interface.
2. INTERACTIVE DATA ACQUISITION SYSTEM
DATA-ACQUISITION systems are in great demand in
industry and consumer applications. In some applications,
human beings have been replaced by unmanned devices that
will acquire data and relay the data back to the base. There are
data-acquisition and control devices that will be a substitute
for a supervisor in a multisite job operation. A single person
can monitor and even interact with the ongoing work from a
machine. An acquisition unit designed to collect data in their
simplest form
Fig.1 Embedded-web server Architecture

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3. HUMAN-MACHINE INTERFACE PRINCIPLE
In this we use new technologies, new devices and computer
integrated control technology to design man-machine interface
of the plastic molding process but Man-machine interface
principle requires mechanical-electrical hydraulic integration
equipment. So this ARM based intelligent control system
combines the Process features of molding machine. Embedded
& field technologies are utilized on the basis of computer of
hardware & design scheme of software‟s are discussed.
The closed loop control system composed of ARM controller
& sensors realizes the prompt adjustment of the processing
parameters such as temperature, pressure in molding machine.
This can meet the requirement of different plastic products.
Basically Plastic formation process-manufacture of bottles and
hollow-shaped parts. Melting the resin- done in extruder and
Form the molten resin into a cylinder or tube (this tube is
called parison)The parison is placed inside a mold, and
inflated so that the plastic is pushed outward against the cavity
wall the part is allowed to cool in the mold and is then ejected
& the part is trimmed. Finally we will control and monitor the
parameters of this process with advance embedded
technology.
4. FUNCTIONAL SYSTEM DESIGN
Self-design high-performance low-cost plastic Extrusion Blow
molding machine's electrical control circuit diagram is shown
in Figure 1, the control circuit uses LPC2138 as the core
device, rotating device is intelligent closed-loop control
system of servo motor. It communicates with LPC2138 via
serial port. Man-machine interface device connects to
LPC2138 by CAN bus. LPC2138 takes main control tasks as
the core device, it accept control commands form human-
machine interface and send parameters of display information,
control equipment process sequence, handle keyboard
procedure, control temperature and pressure of molding
process by actuating electro-hydraulic proportional valve and
so on.
Fig.2 Functional Block Diagram
4.1 ARM CONTROLLER
• Leading provider of 32-bit embedded RISC
microprocessors, 75% of market, High performance, Low
power consumption, Low system cost.
• ARM is basically a 32-bit RISC processor (32-bit data bus
and address bus) with fast interrupt response for use in real
time applications.
• ARM is intended for use of applications, which require
power efficient processors, such as Telecommunications, Data
Communication (protocol converter), Portable Instrument,
Portable Computer and Smart Card.
• ARM7TDMI-S processor, running at up to 72 MHz.
•Single 3.3 V power supply (3.0 V to 3.6)
Power Control in ARM
Three reduced power modes: idle, sleep, and power-down.
ARM cores support basic two reduced power modes- Idle
mode and Power-down mode. In Idle mode, execution of
instructions is suspended until either a reset or interrupt
occurs. Peripheral functions continue operation during Idle
mode and may generate interrupts to cause the processor to
resume execution. Idle mode eliminates power used by the
processor itself, memory systems and related controllers, and
internal buses.
In Power-down mode, the oscillator is shut down and the chip
receives no internal clocks. The processor state and registers,
peripheral registers, and internal SRAM values are preserved
throughout Power-down mode and the logic levels of chip
output pins remain static. The Power-down mode can be
terminated and normal operation resumed by either a reset or

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certain specific interrupts that are able to function without
clocks. Since all dynamic operation of the chip is suspended,
Power-down mode reduces chip power consumption to nearly
zero. Entry to Power-down and Idle modes is coordinated with
program execution. For example, in ARM7 power mode
control is achieved through the PCON register.
4.2 TEMPERATURE SENSOR (LM35):
As per the required power for the molding process we can
select the Precision Centigrade temperature sensor LM 35.
The LM35 series are precision integrated-circuit temperature
sensors, whose output voltage is linearly proportional to the
Celsius (Centigrade) temperature.
Features
- Calibrated directly in ° Celsius (Centigrade)
- Linear + 10.0 mV/°C scale factor
- Rated for full −55° to +150°C range
- Operates from 4 to 30 volts
- Less than 60 μA current drain
-Low impedance output, 0.1 W for 1 mA Load.
Linear characteristics:
4.3 PRESSURE SENSOR (MPX2053D)
As per the required power for the molding process we can
select the 50 kPa On-Chip Temperature Compensated and
Calibrated Silicon Pressure Sensors. that provide a highly
accurate and linear voltage output directly proportional to the
Applied pressure.
Features
• Temperature Compensated Over 0ºC to +85ºC.
• Easy-to-Use Chip Carrier Package Options
• Ratio metric to Supply Voltage
• Gauge Ported and Non Ported Options
• Available in Easy-to-Use Tape & Reel
• Differential and Gauge Pressure Options
MPX2053D.
5. SOFTWARE DESIGN FOR BLOW MOLDING
MACHINE SYSTEM
6. RESULTS AND DISSCUSSIONS
Following Figure shows execution results of ARM embedded
on GUI output Window & current status of molding machine.
Main control module and user interface module constitute two
circuit boards. Man-machine interface module connect main
control module, Human-computer interface control unit
connects by CAN bus, connects computer by USB Interface or
serial communication ports.

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Fig. 4 Human –Machine Interface.
7. FUTURE SCOPE
Fig. 5 Block diagram of embedded system with sample
devices attached for future work.
The general hardware structure of the remote I/O data
acquisition and control system based on ARM processor is
shown in Fig. 5 The remote I/O data acquisition and control
system based on embedded ARM platform has high
universality, each acquisition and control device equipped
with 24-way acquisition/control channels and isolated from
each other. Each I/O channel can select a variety of electrical
and non electrical signals like current, voltage, resistance etc.,
Digital acquisition are done by special ADC. The measured
data are stored in external memory in which the memory is act
as a data base during web server mode. The ARM processor
directly supports the Ethernet service and RS485
communication. Hence the data has been stored and controlled
by some other PCs or network via RS485 and Ethernet.
CONCLUSIONS
It uses high performance processor LPC 2138 as the control
core in this paper, it configures large capacity memory, CAN
bus controller for large distance. This design allows a Blow
molding machine have a human machine interface device, to
communicate with the host computer directly, send historical
data to the computer and vice versa. The software structure
uses embedded C then Transplant GUI in VB to LPC2138.
Programming platforms with liquid crystal module is built.
The design of plastic blow molding machine Human
Computer interaction system can be transplant easily, develop
conveniently. It has multiple functional, good performances,
and is very reliable, low power consumption as compare to
Analog controlling techniques. So this design is necessary and
has practical significance.
ACKNOWLEDGEMENTS
This research project would not have been possible without
the support of my mentor, guide, teachers and friends. I am
thankful to all the individuals who encouraged and helped me
directly and indirectly to carry this work. Their continuous
invaluable knowledgably guidance throughout the course of
this study helped me to complete the work up to this stage and
hope will continue in further research.
REFERENCES
[1]. He Yang, Li Kejian, Cai Qizhong, ‟Design of ARM Based
human machine interface of plastic injection molding
machine‟, Guangxi University of Technology Liuzhou
China,2010,pp449-453.
[2]. Zhilei Cui, Jine Wang, “Distributed Intelligent Control
System of the Injection Molding Machine Based On ARM
controller”, Suzhou Vocational University Suzhou, China,
2011, pp 339-342
[3]. Peng Yang, Le Yang, Xin Guo, „Research ON Embedded
Data Display unit based on CAN Bus‟, Hebei University of
Technology Tianjin China,2009,pp 3498-3501.
[4]. Zhi‟an Wang Xuhui Wang,Shuangyou Wang, ‟A multi-
channel Temperature acquisition system based on Arm and
CAN bus‟, Handan college Handan, Hebei
Province,China,2010,pp32-34.
[5]. Wu-Chung Su, Ching-chih Tsai, „Discrete –Time VSS
temperature Control for a Plastic Extrusion Process with
Cooling Systems‟, Dept of Electrical Engg, National Chung-
Hsing university, Taichung, Taiwan, 2001,pp 619-623.
[6]. 'ARM System Developer‟s Guide‟ by Andrew Sloss,
Chris Wright, Morgan publishers.
BIOGRAPHIES:
More Archana A. received BE Electronics
from Karmaveer Bhaurao Patil College of
Engineering Satara and now studying MTech
(Electronics) in Rajarambapu Institute of
Technology, Sakharale
R.T. Patil received the ME in Electronics and
currently working as associate professor in
Rajarambapu Institute of Technology,
Sakharale. His area of specialization is VLSI,
Embedded Systems.

Arm based human machine interface of plastic extrusion blow molding system

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Arm based human machine interface of plastic extrusion blow molding system