Application of CORDIC in capacitive rotary encoder signal demodulation

2012 ◽  
Author(s):  
Dezhi Zheng ◽  
Shaobo Zhang ◽  
Yuming Zhang ◽  
Chen Fan
Keyword(s):  
Rotary Encoder ◽  
Signal Demodulation

Study on FSK Signal Demodulation Based on Chirp-Z Transform

2012 ◽  
Vol 532-533 ◽  
pp. 827-831
Author(s):  
Jiang Hua Xia ◽  
Jing Guo ◽  
Xiao Ming Wang
Keyword(s):  
Frequency Shift ◽  
Matlab Simulation ◽  
A Algorithm ◽  
Signal Parameters ◽  
Detailed Explanation ◽  
Symbol Rate ◽  
Shift Keying ◽  
Signal Demodulation ◽  
Track Circuits ◽  
Strong Ability

The Frequency-Shift Keying (FSK) signal is frequently used in track circuits because of the strong ability of resistance interference. Symbol rate is one of the important signal parameters for safety of railway. The paper propose a algorithm of high precise detectation of FSK signal using Chirp-Z transform; Theoretically gives the detailed explanation to the major technique, and has carried on the Matlab simulation, The simulation result indicates this method during the enhancement is shifted signal examination precision, reduced the computation order of complexity.

Improved Local Mean Decomposition and its Application to Fault Diagnosis of Train Bearing

2013 ◽  
Vol 819 ◽  
pp. 155-159
Author(s):  
Peng Wang ◽  
Huai Xiang Ma
Keyword(s):  
Fault Diagnosis ◽  
Vibration Signal ◽  
Processing Method ◽  
Nonstationary Signal ◽  
Practical Application ◽  
Local Mean Decomposition ◽  
Signal Processing Method ◽  
Signal Demodulation ◽  
Improvement Method ◽  
Local Mean

Fault diagnosis of train bearing is an important method to ensure the security of railway. The key to the fault diagnosis is the method of vibration signal demodulation. The local mean decomposition (LMD) is a self-adapted signal processing method which has a good performance in nonlinear nonstationary signal demodulation. The improved LMD method based on kurtosis criterion can prevent errors in the process of calculating the product functions. With the verification of simulation and wheel set experiment, the improvement method has been certified usefully in practical application.

The optical mouse sensor as an incremental rotary encoder

2009 ◽  
Vol 155 (1) ◽  
pp. 73-81 ◽  
Author(s):  
M. Tresanchez ◽  
T. Pallejà ◽  
M. Teixidó ◽  
J. Palacín
Keyword(s):  
Rotary Encoder ◽  
Optical Mouse

Position and Speed Detection of Synchronous Motor Rotor

2012 ◽  
Vol 236-237 ◽  
pp. 61-66
Author(s):  
R.M. Tao ◽  
X. Tao ◽  
C.R. Xiong
Keyword(s):  
Machine Tools ◽  
High Performance ◽  
Synchronous Motor ◽  
Pole Position ◽  
Cnc Machine Tools ◽  
Detection Accuracy ◽  
Cnc Machine ◽  
Velocity Signal ◽  
Signal Demodulation ◽  
Server System

This article describes a method to detect the position and speed in a rotary transformer pole AC synchronous motor. This method gives the pole position and velocity signal demodulation circuit and analyses the demodulation principle. After practical testing, this approach is reliable with high detection accuracy. Therefore, it is fully able to meet the needs of CNC machine tools with high performance in AC server system.

Index phase output characteristics of magnetic rotary encoder using a magneto-resistive element

1997 ◽  
Vol 33 (5) ◽  
pp. 3370-3372 ◽  
Author(s):  
Y. Kikuchi ◽  
F. Nakamura ◽  
H. Wakiwaka ◽  
H. Yamada
Keyword(s):  
Rotary Encoder ◽  
Resistive Element ◽  
Output Characteristics

Implementasi Kontrol PI Untuk Pengaturan Kecepatan Motor DC Pada Alat Pengupas Kulit Ari Kedelai

2020 ◽  
Vol 3 (1) ◽  
pp. 61
Author(s):  
Rizza Ade Fratama ◽  
Herwandi Herwandi ◽  
Ratna Ika Putri
Keyword(s):  
Rhizopus Oryzae ◽  
Rhizopus Oligosporus ◽  
Set Point ◽  
Rotary Encoder ◽  
Arduino Uno

Tempe merupakan makanan tradisional khas Indonesia   yang   terbuat  dari   hasil   fermentasi   kedelai dengan jamur Rhizopus oligosporus dan Rhizopus oryzae. Terdapat  tiga  tahapan  dalam  proses  pembuatan  tempe yaitu pengupasan, perebusan dan peragian (Inokulasi). Proses  pengupasan  umumnya  masih  menggunakan cara klasik yaitu di injak-injak sehingga membutuhkan waktu yang cukup lama dan keahlian. Untuk mengatasi permasalahan tersebut terdapat inovasi baru yaitu alat pengupas  kulit  ari  kedelai  dengan  menggunakan  motor DC. Dengan mengunakan alat diharapkan dapat mengupas kulit ari kedelai dengan waktu yang singkat. Namun kecepatan  motor  saat  proses  pengupasan  tidak  stabil karena dipengaruhi oleh kedelai sehingga proses pengupasan   tidak   maksimal.   Untuk   memaksimalkan kinerja alat tersebut maka dibutuhkan kontroler untuk mengatur kecepatan putaran motor DC agar tetap konstan sesuai set point dengan tingkatan pembebanan yang berbeda-beda. Metode kontrol yang digunakan adalah metode PI yang ditanamkan pada sebuah mikrokontroler. Mikrokontroler yang digunakan adalah Arduino Uno. Kontrol PI akan  membandingkan nilai  set point dengan kecepatan motor DC yang dibaca oleh rotary encoder. Nilai konstanta Kp dan Ki dapat ditentukan dengan metode osilasi Ziegler-Nichols. Berdasarkan pengujiuan di dapat respon sistem yang baik dengan nilai Kp = 0.909 Ki = 4.166 dan presentase hasil pengupasan 70%.

Features of a magnetic rotary encoder

1987 ◽  
Vol 23 (5) ◽  
pp. 2182-2184 ◽  
Author(s):  
K. Miyashita ◽  
T. Takahashi ◽  
M. Yamanaka
Keyword(s):  
Rotary Encoder
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