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High speed image acquisition system of absolute encoder 7

High speed image acquisition system of absolute encoder

引用

7th International Conference on Electronics and Information Engineering (ICEIE)

作者： Liao, Jianxiang Chen, Xin Chen, Xindu Zhang, Fangjian Wang, Han Guangdong Univ Technol Sch Electromech Engn Guangzhou Guangdong Peoples R China

ISBN: (数字)9781510610811

ISBN: (纸本)9781510610811

Absolute optical encoder as a product of optical, mechanical and electronic integration has been widely used in displacement measuring fields. However, how to improve the measurement velocity and reduce the manufacturing cost of absolute optical encoder is the key problem to be solved. To improve the measurement speed, a novel absolute optical encoder image acquisition system is proposed. The proposed acquisition system includes a linear ccd sensor is applied for capturing coding pattern images, an optical magnifying system is used for enlarging the grating stripes, an analog- digital conversion( ADC) module is used for processing the ccd analogy signal, a field programmable gate array( FPGA) device and other peripherals perform driving task. An absolute position measurement experiment was set up to verify and evaluate the proposed image acquisition system. The experimental result indicates that the proposed absolute optical encoder image acquisition system has the image acquisition speed of more than 9500fp/ s with well reliability and lower manufacture cost.

关键词： Absolute encoder image acquisition system linear ccd image sensor Precision measurement

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Choice of optimum modes of laser triangulation meter at control of surface form

Choice of optimum modes of laser triangulation meter at cont...

引用

Conference on Lasers for Measurements and Information Transfer 2003

作者： Venediktov, AZ Demkin, VN Dokov, DS Sci Ind Co Agroel Ryazan 390013 Russia

ISBN: (纸本)081945298X

The article is devoted to the problem of accuracy increase at measurement of surface geometry with triangulation meters. It is shown, that the threshold of the signal selection from a photoreceiver and the time of exposure influence the accuracy of measurement. The choice of magnitude of the threshold and exposure time which make the accuracy increase of measurements possible is substantiated.

关键词： laser triangulation linear ccd image sensor threshold of comparison exposure time

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Industrial monitoring and controlling system of integrated single chip computer with linear ccd image sensor

Industrial monitoring and controlling system of integrated s...

引用

Conference on Process Control and sensors for Manufacturing II

作者： Wang, JH Mei, AH Wuhan Tech Univ Surveying & Mapping Opt Instrument Dept Wuhan 430070 Peoples R China

ISBN: (纸本)0819430595

This paper presents a monitoring and controlling system which integrated single chip computer with linear ccd image sensor for measuring the length of automobile screws in industrial automatic line, The system consists of hardware and software. There five parts in the hardware setup. They are Optical part machinery, linear ccd image sensor and its drivring circuit, binarilizing circuit and 8098 user setup. The measuring range is adjustable because single end measurment is used. Minnum bi - multiplication is applied in the software to correct system deviation and increase system precision. Experiment has proved that the system is highly effective, nontouch, nondestructive and economical.

关键词： linear ccd image sensor single chip computer monitoring controlling

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Adjustable on-line industrial monitoring and controlling system using linear ccd image sensor

Adjustable on-line industrial monitoring and controlling sys...

引用

Conference on Machine Tool, In-Line, and Robot sensors and Controls

作者： Wang, JH Mei, AH Yu, MZ WUHAN TECH UNIV SURVEYING & MAPPING OPT INSTRUMENT DIVWUHAN 430070PEOPLES R CHINA

ISBN: (纸本)0819419591

This paper presents an industrial monitoring and controlling system designed for the size measuring of the automation line. The system employs a linear ccd image sensor and 8098 single-chip computer. The object is imaged on the ccd through an optical setup, then, the image signal of the object is produced. By means of binarilizing, amplifying and transforming, the pulse signal with certain width corresponding to the length of the object is inputted to the single-chip computer. The system applies the method of filling pulse. By calculating the numbers of the pulses filled, the system obtains the length of the object and displays it on a light-emitted diode (LED). When the size of the object is over the tolerance, the system will warn by audio and light and operate the take-off device to take the object out of the line. The measuring range is adjustable. Therefore, the system is suitable for real time industrial application.

关键词： linear ccd image sensor chip computer on-line monitoring controlling

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