Conference Program of WCICA 2012

Conference Program WCICA 2012
improved the signal-to-noise ratio and precision. The host mainly contained
four parts, including micro-control system, driving circuit of light
source, photoelectric conversion and signal conditioning circuit and L-
CD display circuit. In addition, in the structure of host an open data interface
was reserved for very easily connect to the leaves clamp, which
achieved real-time, quick and nondestructive measurement of different
plant components (chlorophyll and moisture of plant leaves were basically
studied in this paper. The characteristic wavelengths 680nm and
940nm was used to measure chlorophyll, 880nm and 974nm was used
to measure moisture). In the calibration experiment the instrument have
a excellent results of the prediction. The correlation coeffieient between
the prediction value and the true value of moisture content and chlorophyll
content repectively is 0.86 and 0.92. The standard error of prediction
repectively is 0.016 and 0.020.
◁ PSaB-81
High Precision Attitude Estimation Algorithm Using Three Star Trackers,
pp.4168–4173
Chen, Binglong
Geng, Yunhai
Yang, Xu
Harbin Inst. of Technonlogy
Harbin Inst. of Tech.
Harbin Inst. of Tech.
This paper presents an attitude estimation algorithm for the satellite
with three star trackers. The attitude estimation accuracy can be improved
with modified attitude matrix using measurements from other s-
tar trackers. The attitude determination algorithm with two star trackers
was reviewed firstly, and then a modified attitude estimation algorithm
using three star trackers is proposed to enhance the precision of the
attitude estimation. The extended Kalman filter is used to estimate the
attitude of the nonlinear satellite system, and a federated configuration
is adopted to process the estimated states and covariance matrices for
high accuracy attitude estimation. Using the proposed algorithm, the
satellite can perform missions continuously. A mathematical simulation
is performed to verify the effectiveness of the adoption attitude estimation
algorithm, using a designed PD control, five reaction wheels as
the attitude control system and three star trackers mounted with a titled
angle and a federated EKF as attitude determination system.
◁ PSaB-82
Application of Blind Sources Separation in Plant Leaves Classification,
pp.4174–4179
WU, Ying
GUO, Tian-tai
JIANG, Jie-wei
China Jiliang Univ.
China Jiliang Univ.
China Jiliang Univ.
This paper discussed the application of Blind Sources Separation (B-
SS) in plant leaves classification. Firstly, collection of two different types
of plant leaves was performed using the Nexus-870 Fourier transform
infrared spectroscopy, and wavelet analysis was adopted to compress
the immense sample data, thus accelerating the data processing
speed .Then the BSS algorithm FastICA algorithm was used on the
compressed spectral data to increase the difference between the different
signals. Finally, BP neural network algorithm was used to achieve
the classification of plant species. Experiments showed that processing
data in near-infrared spectroscopy through BSS can not only improve
the speed and accuracy of BP neural network, but also enhance its
classification correctness, and the classification results with the proposed
method was satisfactory.
◁ PSaB-83
Defect depth automation measurement based on image processing for
TOFD parallel scanning, pp.4180–4183
Shan, Mingguang
Liu, Shengchun
Harbin engineering Univ.
Harbin engineering Univ.
To get more precise defect depth in parallel scanning of ultrasonic timeof-flight
diffraction (TOFD) technique, a method for automatically measuring
defect depth using defect image data is proposed in this paper.
The method extracts defect image data from B-scan image through a
series of image processing to fit a parabolic curve. Defect depth will be
easily obtained by combining the quadratic coefficient of fitted parabolic
curve with that of formula based on the principle of ultrasonic TOFD
parallel scanning. Experiment result shows that the defect depth measuring
error is less than 0.5 mm with this method and demonstrates
strong practicability, high degree of automation and high measurement
precision of the proposed method, reducing ultrasonic testing workload
of the operator.
◁ PSaB-84
The Discussion of Semi-structured Sample Modeling on Expanding
2.5D Method, pp.4195–4200
Yu, Shun
Zhang, Tie
Northeastern Univ.
Northeastern Univ.
It is important to build entity modeling which it exists in the outdoor
environment with human activities in the nature increasingly. Outdoor
entity can be divided into structured, semi-structured and unstructured.
This paper uses expanding 2.5D method to model semi-structured entity
which it is very representative. The semi-structured entity can be
divided into simple standard sample, complex standard sample, simple
deformed sample and complex deformed sample in accordance with
half-dimensional information gradual deepening complexity. Analyze
data structure, build sample modeling. After that, build entity modeling
with some operation.
◁ PSaB-85
A Single Chip Multi-functional DDS Waveform Generator based on FP-
GA with SOPC Design Flow, pp.4206–4210
Ruan, Yue
Tang, Ying
Yao, Wen-ji
Wang, Zhang-quan
Xu, Sen
Zhejiang Shuren Univ.
Zhejiang Shuren Univ.
Zhejiang Shuren Univ.
Zhejiang Shuren Univ.
Zhejiang Shuren Univ.
This work presents a highly integrated single chip multi-functional,
multi-waveform signal generator which can generate various waveforms,
with digital controller inside to adapt embedded and low power applications.
The proposed system is composed by Nios II, DDS (Direct
Digital Synthesis) and other peripherals. Nios II is a reconfigurable,
programmable and optimizable soft-core embedded CPU. DDS is used
to generate required waveforms. Together with modern EDA tools, the
system HW/SW co-design and FPGA implementation is accomplished,
using typical SOPC design flow. Utilizing characteristics of Nios II, the
core and peripheral logical units that system need are put together and
implanted into a single FPGA chip. The Avalon bus is used to connect
peripheral modules (such as function switch buttons and 7-segment
LED display units) to Nios II’s Avalon bus main port (instruction and
data control port). The realized system is flexible to reduce, extend,
with low power consumption, and has System on Programmable Chip
(SOPC) function which means the system’s software and hardware is
online programmable.
◁ PSaB-86
Pulse Monitoring System Based on Feedback Algorithm, pp.4211–
4214
An, Peng
Zeng, Ming
Ningbo Univ. of Tech.
Tsinghua Univ.
Pulse monitoring system was designed with integrated AD module in
micro-controller chip and the feedback algorithm. HK-2000B-type sensor
was used for collecting the pulse signal. Customize the design process,
some components, the preparation of the LCD driver and display
the menu; in addition, by using the results of the feedback signal sampling
algorithm improves the measurement accuracy. After a long and
diverse system of the test, the accuracy and stability while significantly
reduce the measurement time, with high practical value.
◁ PSaB-87
The Smulation and Model of Twisted Lever-arm Effect in Transferalignment
of Stradown Inertial Navigation, pp.4235–4240
Pan, Shuang
Navial Submarine Acad.
Based on the theory of twisted lever-arm effect, this paper provided a
new model for the lever-arm effect caused by the shipboard weapons’
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