scholarly journals Full Digital Processing System of Photoelectric Encoder

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4892
Author(s):  
Changhai Zhao ◽  
Qiuhua Wan ◽  
Lihui Liang ◽  
Ying Sun
Keyword(s):  
Environmental Changes ◽  
Processing System ◽  
Digital Processing ◽  
High Accuracy ◽  
Harsh Environments ◽  
Current Limiting ◽  
Voltage Signal ◽  
Data Processor ◽  
Photoelectric Encoder ◽  
Signal Output

A photoelectric signal, output by a photoelectric receiver, may detrimentally change after the photoelectric encoder is used for a period of time or when the environment changes; this will directly affect the accuracy of the encoder and lead to fatal errors in the encoder. To maintain its high accuracy, we propose an encoder that can work in a variety of environments and that adopts full digital processing. A signal current that travels from the receiver of a photoelectric encoder is converted into a voltage signal via current limiting resistance. All signals are directly processed in the data processor component of the system. The encoder converts all the signals into its normalized counterpart. Then, the angle of the encoder is calculated using the normalized value. The calculated encoder angle compensates for any error. The final encoder angle is obtained, and the encoder angle is output accordingly. Experiments show that this method can greatly reduce the encoder’s volume. This method also reduces the encoder error from 167 arcseconds to 53 arcseconds. The encoder can still maintain a high accuracy during environmental changes, especially in harsh environments where there are higher accuracy requirements.

Digital Processing of STEM Images

1981 ◽  
Vol 39 ◽  
pp. 236-237
Author(s):  
A. V. Crewe ◽  
M. Ohtsuki
Keyword(s):  
High Resolution ◽  
Low Dose ◽  
Assembly Language ◽  
Processing System ◽  
Principal Component ◽  
Digital Processing ◽  
Image Analysis System ◽  
Black And White ◽  
Analysis System ◽  
Dose Imaging

We have assembled an image processing system for use with our high resolution STEM for the particular purpose of working with low dose images of biological specimens. The system is quite flexible, however, and can be used for a wide variety of images.The original images are stored on magnetic tape at the microscope using the digitized signals from the detectors. For low dose imaging, these are “first scan” exposures using an automatic montage system. One Nova minicomputer and one tape drive are dedicated to this task.The principal component of the image analysis system is a Lexidata 3400 frame store memory. This memory is arranged in a 640 x 512 x 16 bit configuration. Images are displayed simultaneously on two high resolution monitors, one color and one black and white. Interaction with the memory is obtained using a Nova 4 (32K) computer and a trackball and switch unit provided by Lexidata.The language used is BASIC and uses a variety of assembly language Calls, some provided by Lexidata, but the majority written by students (D. Kopf and N. Townes).

Data processing system of 21 bit photoelectric encoder

2010 ◽  
Vol 24 (6) ◽  
pp. 569-573
Author(s):  
Changhai Zhao ◽  
Qiuhua Wan ◽  
Shujie Wang ◽  
Xinran Lu
Keyword(s):  
Data Processing ◽  
Processing System ◽  
Data Processing System ◽  
Photoelectric Encoder

scholarly journals MONITORAMENTO DA COBERTURA VEGETAL POR SENSORIAMENTO REMOTO NO SEMIÁRIDO BRASILEIRO ATRAVÉS DE ÍNDICES DE VEGETAÇÃO

Nativa ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 708
Author(s):  
Caio Victor Santos Silva ◽  
Jhon Lennon Bezerra da Silva ◽  
Geber Barbosa De Albuquerque Moura ◽  
Pabrício Marcos Oliveira Lopes ◽  
Cristina Rodrigues Nascimento ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Vegetation Cover ◽  
Environmental Changes ◽  
Spectral Response ◽  
Vegetation Indices ◽  
Digital Processing ◽  
Semiarid Region ◽  
Dry Period ◽  
Biophysical Parameters ◽  
Brazilian Semiarid

São necessárias medidas que visem à proteção e conservação dos recursos hídricos e naturais de forma rápida e eficiente. As técnicas de sensoriamento remoto são essenciais para o monitoramento ambiental dos recursos no semiárido no espaço e no tempo. Objetivou-se monitorar e analisar à dinâmica da cobertura vegetal através da variabilidade espaço-temporal do albedo da superfície e índices de vegetação em região de Caatinga do semiárido brasileiro por sensoriamento remoto. A área de estudo é o município de Arcoverde, localizado no semiárido de Pernambuco. O estudo foi desenvolvido através de seis imagens orbitais do Landsat-5 do sensor TM. O processamento digital dos parâmetros biofísicos foi realizado pelo algoritmo SEBAL. Os resultados foram analisados através da estatística descritiva e quanto a sua variabilidade. Áreas possivelmente degradadas foram identificadas pelos altos valores de albedo e índices de vegetação significativamente menores, localizadas à sudoeste e noroeste da região. Os índices apresentaram comportamento similares, principalmente no período seco, com baixos valores sendo próximos de zero, áreas afetadas pelo período de seca no semiárido. O SAVI apresentou maior precisão, destacando melhor resposta espectral da vegetação. O sensoriamento remoto promoveu monitoramento espaço-temporal adequado, destacando principalmente o período classificado como climaticamente seco através do albedo e índices de vegetação.Palavras-chave: Caatinga; NDVI; SAVI; mudanças ambientais; SEBAL. MONITORING OF VEGETATION COVER BY REMOTE SENSING IN BRAZILIAN SEMIARID THROUGH VEGETATION INDICES ABSTRACT: Measures are needed aimed at the protection and conservation of water and natural resources quickly and efficiently. Remote sensing techniques are essential for the environmental monitoring of resources in the semiarid region in space and time. Aimed to monitor and analyze the dynamics of vegetation cover through the spatial-temporal variability of the surface albedo and indices of vegetation in the Caatinga region of the Brazilian semiarid by remote sensing. The study area is the municipality of Arcoverde, located in the semiarid of Pernambuco. The study was developed through six orbital images of Landsat-5 of the TM sensor. The digital processing of the biophysical parameters was performed by the SEBAL algorithm. The results were analyzed through descriptive statistics and their variability. Possibly degraded areas were identified by high albedo values and significantly lower vegetation indices, located in the southwest and northwest of the region. The indexes showed similar behavior, mainly in the dry period, with low values being close to zero, areas affected by the dry period in the semiarid. The SAVI presented higher accuracy, highlighting better spectral response of the vegetation. Remote sensing promoted adequate space-time monitoring, highlighting mainly the period classified as climatically dry through the albedo and vegetation indexes.Keywords: Caatinga; NDVI; SAVI; environmental changes; SEBAL.

Application of Digital Image Processing Software in Ceramic Design

2014 ◽  
Vol 543-547 ◽  
pp. 2435-2439
Author(s):  
Wei Li ◽  
Xin Yu Zhang
Keyword(s):  
Image Processing ◽  
Digital Media ◽  
Digital Image Processing ◽  
Digital Image ◽  
Processing System ◽  
Digital Processing ◽  
Geometric Transformation ◽  
Processing Software ◽  
Image Processing Software ◽  
Ceramic Design

From rest to exercise and from two-dimensional to three-dimensional, digital image processing software can be multi-angle, multi-dimension, multi-direction infiltration for the various fields of design, which has wide applications in every corner of digital media. Firstly, the digital image processing software can analyze the common digital processing system model. On the basis of the principle of RGB color histogram, it also can analyze its application in the ceramic design. According to the set of image transformation principle, the analysis of the geometric transformation plays an important role in in ceramic set, to provide the theoretical basis for the digital image processing software to a certain extent.

Application of Digital Image Processing Technology in the Process of Ceramic Art Image

2014 ◽  
Vol 687-691 ◽  
pp. 3738-3742 ◽  
Author(s):  
Zan Bin Peng
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Processing System ◽  
Digital Processing ◽  
Processing Technology ◽  
Computer Hardware ◽  
Visual Effect ◽  
Image Processing Technology ◽  
Ceramic Art

With the improvement of computer hardware and software performance, digital multimedia technology has been applied to various fields. The visual effect of ceramic art image is affected mainly by the brightness, texture and color, in which the image defects will affect the visual effect of the ceramic product. This paper designs the digital processing system of a new ceramic art image processing, the system can repair defects in ceramic art image. In order to verify the validity and reliability of digital processing system, the lead-free perovskite structure BZT based ceramics is prepared in this paper, and the use of electron microscope and digital camera take the ceramic products processing image with artistic defects, and then using VB programming digital image processing technology carries out color re coating for the ceramic, the ceramic products electron microscopy images after restoration will be obtained by the image boundary restructuring, which provides a new computer method for the processing art of the ceramic products.

scholarly journals Alat Monitoring Infus Set pada Pasien Rawat Inap Berbasis Mikrokontroler ATmega 8535

2018 ◽  
Vol 4 (1) ◽  
pp. 1 ◽  
Author(s):  
DECY NATALIANA ◽  
NANDANG TARYANA ◽  
EGI RIANDITA
Keyword(s):  
Noise Level ◽  
Output Voltage ◽  
Threshold Value ◽  
Infrared Sensors ◽  
Voltage Drops ◽  
Digital Comparator ◽  
Infra Red ◽  
Voltage Signal ◽  
Data Processor ◽  
Infusion Fluid

ABSTRAKMetode yang digunakan untuk mengetahui volume cairan Infus adalah dengan cara mendeteksi tetesan yang berada pada chamber Infus. Tetesan dideteksi oleh sensor cahaya yaitu LED infra merah dan photodioda. Sinyal tegangan dari sensor dikondisikan dengan IC komparator LM339 . Mikrokontroler ATmega 8535 digunakan sebagai pengolah data  I/O dari komparator sehingga informasi dari parameter  yang dimonitor dapat ditampilkan pada LED dan LCD serta bunyi buzzer. Tegangan keluaran sensor infra merah saat mendeteksi tetesan adalah sebesar 1,02 V sedangkan saat tidak mendeteksi tetesan tegangan keluaran sebesar 180 mV. Parameter yang dapat dideteksi dari alat ini diantaranya jumlah tetesan per menit dengan maksimal jumlah tetes / menit yang dideteksi sebesar 255 tetes, peringatan bila tetesan tidak terdeteksi selama 10 detik dan peringatan bila cairan Infus akan habis (± 50 ml). Suara yang dihasilkan buzzer masih terdengar jelas dan tidak berbahaya bagi pendengaran perawat berdasarkan nilai ambang batas tingkat kebisingan meskipun keadaan di ruangan perawat dalam kondisi ramai.Kata kunci: Infus set, intravena, photodioda, infra merah, mikrokontroler ATmega 8535, Infus. ABSTRACTThe method used to know the volume of Infusion fluid is detecting droplets that are on Infusion chamber. The droplets are detected by the light sensors is infrared LED and  photodiode. The voltage signal from the sensor is conditioned by the digital comparator IC LM339. ATmega microcontroller 8535 is used as a data processor of the comparator output so that information from the monitored parameters can be displayed on the LCD and LED and buzzer flame. The output voltage when infrared sensors detect a drop is 1.02 V, while sensor does not detect a drop the output voltage drops is 180 mV. Parameters that can be detected from these tool include the number of drops per minute with a maximum number of drops / min was detected at 255 drops, a warning when the droplets are not detected for 10 seconds and a warning when Infuse fluids will run out (± 50 ml). Buzzer’s sound still clearly audible and not dangerous for nurse’s hearing based on noise level threshold value though the situation in the nurse’s room in crowded conditions.Keywords: Infusion sets, intravenous, photodioda, infra red, microcontroller, Infusion.

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