Application Research of ARM Embedded System in the Vision System of Chip Mounters

Chip mounters are the important equipment on Surface Mounting Technology (SMT) production line, and with continuous improvement of the requirement on the mounting speed and mounting accuracy of micro-electronic components, high-speed and high-precision chip mounters have become important goals pursued by many companies and manufacturers of SMT equipment. As there is great difference in the shape, size, shape and number of pins of the components to be mounted by chip mounters, higher technical requirements on the mounting components identification and visual system must be put forward. The traditional mounter vision system controls and handles the light source system and the image acquisition system by personal computer (PC). However, in the practical application, the visual system has disadvantages such as large volume and high cost, which will lead to the shortcomings of bulky volume of the production equipment, inconvenient assembling, expensive price, difficult upgrading, etc. In this paper, to overcome these deficiencies of mounter vision system, based on the advantages of embedded system such as small size, fast response, reliable operation and relatively low prices, etc., the application of Advanced RISC Machines (ARM) embedded system in SMT machine vision system is researched, and the whole system and the module design is done with the modular design thought, which is conductive to the development and later maintenance, updating, and upgrade of the system.

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Data Acquisition System Based on uC/OS-III Embedded System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.619.85 ◽

2012 ◽

Vol 619 ◽

pp. 85-89 ◽

Cited By ~ 1

Author(s):

Wen Hua Li ◽

Jin Yu Zheng ◽

Chen Yu

Keyword(s):

Embedded System ◽

Data Acquisition ◽

Real Time ◽

High Speed ◽

Modular Design ◽

Embedded Operating System ◽

Collection System ◽

High Speed Data Acquisition ◽

High Speed Data ◽

Design Ideas

This paper presents a data collection system based on C8051F040 processor and real-time embedded operating system uC/OS-III. The hardware part design, uC/OS-III transplant process and notes, system processes are discussed in detail. This system takes the modular design ideas and reasonable task-assigned strategy, make software is easy to code and modify, realizes real-time, high speed data acquisition.

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Direct Current Deadbeat Predictive Controller for BLDC Motor Using Single DC-Link Current Sensor

Engineering and Technology Journal ◽

10.30684/etj.v38i8a.471 ◽

2020 ◽

Vol 38 (8A) ◽

pp. 1187-1199

Author(s):

Qaed M. Ali ◽

Mohammed M. Ezzalden

Keyword(s):

Control System ◽

High Speed ◽

Fast Response ◽

Bldc Motor ◽

Current Controller ◽

Three Phase ◽

Predictive Controller ◽

Two Phases ◽

Dc Current ◽

Three Phase Inverter

BLDC motors are characterized by electronic commutation, which is performed by using an electric three-phase inverter. The direct control system of the BLDC motor consists of double loops; including the inner-loop for current regulating and outer-loop for speed control. The operation of the current controller requires feedback of motor currents; the conventional current controller uses two current sensors on the ac side of the inverter to measure the currents of two phases, while the third current would be accordingly calculated. These two sensors should have the same characteristics, to achieve balanced current measurements. It should be noted that the sensitivity of these sensors changes with time. In the case of one sensor fails, both of them must be replaced. To overcome this problem, it is preferable to use one sensor instead of two. The proposed control system is based on a deadbeat predictive controller, which is used to regulate the DC current of the BLDC motor. Such a controller can be considered as digital controller mode, which has fast response, high precision and can be easily implemented with microprocessor. The proposed control system has been simulated using Matlab software, and the system is tested at a different operating condition such as low speed and high speed.

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Fixed Wing Aircraft Automatic Landing with the Use of a Dedicated Ground Sign System

Aerospace ◽

10.3390/aerospace8060167 ◽

2021 ◽

Vol 8 (6) ◽

pp. 167

Author(s):

Bartłomiej Brukarczyk ◽

Dariusz Nowak ◽

Piotr Kot ◽

Tomasz Rogalski ◽

Paweł Rzucidło

Keyword(s):

Embedded System ◽

Final Section ◽

Vision System ◽

Video Camera ◽

Hardware In The Loop ◽

Glide Path ◽

Automatic Landing ◽

Input Signals ◽

Fuzzy Logic Expert System ◽

Longitudinal Channel

The paper presents automatic control of an aircraft in the longitudinal channel during automatic landing. There are two crucial components of the system presented in the paper: a vision system and an automatic landing system. The vision system processes pictures of dedicated on-ground signs which appear to an on-board video camera to determine a glide path. Image processing algorithms used by the system were implemented into an embedded system and tested under laboratory conditions according to the hardware-in-the-loop method. An output from the vision system was used as one of the input signals to an automatic landing system. The major components are control algorithms based on the fuzzy logic expert system. They were created to imitate pilot actions while landing the aircraft. Both systems were connected with one another for cooperation and to control an aircraft model in a simulation environment. Selected results of tests presenting control efficiency and precision are shown in the final section of the paper.

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The Demonstration of S2P (Serial-to-Parallel) Converter with Address Allocation Method Using 28 nm CMOS Technology

Applied Sciences ◽

10.3390/app11010429 ◽

2021 ◽

Vol 11 (1) ◽

pp. 429

Author(s):

Min-Su Kim ◽

Youngoo Yang ◽

Hyungmo Koo ◽

Hansik Oh

Keyword(s):

Integrated Circuits ◽

Embedded System ◽

Low Power ◽

High Speed ◽

Cmos Technology ◽

Clock Frequency ◽

Clock Generation ◽

Allocation Method ◽

Evaluation Board ◽

28 Nm

To improve the performance of analog, RF, and digital integrated circuits, the cutting-edge advanced CMOS technology has been widely utilized. We successfully designed and implemented a high-speed and low-power serial-to-parallel (S2P) converter for 5G applications based on the 28 nm CMOS technology. It can update data easily and quickly using the proposed address allocation method. To verify the performances, an embedded system (NI-FPGA) for fast clock generation on the evaluation board level was also used. The proposed S2P converter circuit shows extremely low power consumption of 28.1 uW at 0.91 V with a core die area of 60 × 60 μm2 and operates successfully over a wide clock frequency range from 5 M to 40 MHz.

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Experimental Investigation During Stall and Surge in a Transonic Fan Stage and Rotor-Only Configuration

Volume 6: Turbomachinery, Parts A and B ◽

10.1115/gt2006-90925 ◽

2006 ◽

Cited By ~ 4

Author(s):

A. J. Gannon ◽

G. V. Hobson ◽

R. P. Shreeve ◽

I. J. Villescas

Keyword(s):

High Speed ◽

Fast Response ◽

Pressure Measurements ◽

Post Processing ◽

Transonic Compressor ◽

Compressor Rotor ◽

The Difference ◽

Data Signal ◽

Transonic Fan ◽

Casing Pressure

High-speed pressure measurements of a transonic compressor rotor-stator stage and rotor-only configuration during stall and surge are presented. Rotational speed data showed the difference between the rotor-only case and rotor-stator stage. The rotor-only case stalled and remained stalled until the control throttle was opened. In the rotor-stator stage the compressor surged entering a cyclical stalling and then un-stalling pattern. An array of pressure probes was mounted in the case wall over the rotor for both configurations of the machine. The fast response probes were sampled at 196 608 Hz as the rotor was driven into stall. Inspection of the raw data signal allowed the size and speed of the stall cell during its growth to be investigated. Post-processing of the simultaneous signals of the casing pressure showed the development of the stall cell from the point of inception and allowed the structure of the stall cell to be viewed.

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Based on the CO2 Gas Shielded Welding Molten Pool Image Edge Detection Algorithm

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.437.840 ◽

2013 ◽

Vol 437 ◽

pp. 840-844 ◽

Cited By ~ 1

Author(s):

Xiao Gang Liu ◽

Bing Zhao

Keyword(s):

Edge Detection ◽

Molten Pool ◽

High Speed ◽

Vision System ◽

Detection Algorithm ◽

Pass Filter ◽

Low Pass Filter ◽

Low Pass ◽

Defect Recognition ◽

Pool Image

This paper use the passive vision system through high-speed camera collects molten pool images; and then according to the frequency domain characteristics of the weld pool image Butterworth low-pass filter; gradient method for image enhancement obtained after pretreatment. Research Roberts, Sobel, Prewitt, Log, Zerocross, and Canny 6 both traditional differential operator edge detection processing results. Through comparison and analysis of choosing threshold for [0.1, 0. Canny operator can get the ideal molten pool edge character, for subsequent welding molten pool defect recognition provides favorable conditions.

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High Speed Vision System Using Massively Parallel Processing

Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems ◽

10.1109/iros.1992.587364 ◽

2005 ◽

Cited By ~ 34

Author(s):

M. Ishikawa ◽

A. Morita ◽

N. Takayanagi

Keyword(s):

Parallel Processing ◽

High Speed ◽

Vision System ◽

Massively Parallel ◽

Massively Parallel Processing

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Development of a high-resolution, high-speed vision system using CMOS image sensor technology enhanced by intelligent pixel selection technique

10.1117/12.572719 ◽

2004 ◽

Cited By ~ 9

Author(s):

Kenji Tajima ◽

Akihiko Numata ◽

Idaku Ishii

Keyword(s):

High Resolution ◽

High Speed ◽

Vision System ◽

Cmos Image Sensor ◽

Image Sensor ◽

Sensor Technology ◽

Selection Technique

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Stall Inception in a High Speed Centrifugal Compressor During Speed Transients

Volume 2C: Turbomachinery ◽

10.1115/gt2017-64499 ◽

2017 ◽

Author(s):

Fangyuan Lou ◽

John C. Fabian ◽

Nicole L. Key

Keyword(s):

Heat Transfer ◽

Centrifugal Compressor ◽

High Speed ◽

Flow Instability ◽

Leading Edge ◽

Fast Response ◽

Rotating Stall ◽

Transient Performance ◽

Stall Inception ◽

Pressure Transducers

The inception and evolution of rotating stall in a high-speed centrifugal compressor are characterized during speed transients. Experiments were performed in the Single Stage Centrifugal Compressor (SSCC) facility at Purdue University and include speed transients from sub-idle to full speed at different throttle settings while collecting transient performance data. Results show a substantial difference in the compressor transient performance for accelerations versus decelerations. This difference is associated with the heat transfer between the flow and the hardware. The heat transfer from the hardware to the flow during the decelerations locates the compressor operating condition closer to the surge line and results in a significant reduction in surge margin during decelerations. Additionally, data were acquired from fast-response pressure transducers along the impeller shroud, in the vaneless space, and along the diffuser passages. Two different patterns of flow instabilities, including mild surge and short-length-scale rotating stall, are observed during the decelerations. The instability starts with a small pressure perturbation at the impeller leading edge and quickly develops into a single-lobe rotating stall burst. The stall cell propagates in the direction opposite of impeller rotation at approximately one third of the rotor speed. The rotating stall bursts are observed in both the impeller and diffuser, with the largest magnitudes near the diffuser throat. Furthermore, the flow instability develops into a continuous high frequency stall and remains in the fully developed stall condition.

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