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Plaster thickness uniformity line Detection System

Author: DangMaoHui
Tutor: ChenPeiFeng
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Weighing method Photodetector Transmissive LED light source Broadband uniform spot Frequency Modulation
CLC: TP274.4
Type: Master's thesis
Year: 2009
Downloads: 13
Quote: 0
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Abstract


In the majority of domestic plaster plant , the weighing method easy to implement because of its low cost and still be used to detect the weight of the plaster on the cream , but this method has a poor real-time detection , random measurement error, raw material waste and serious limitations , thus No design a testing real-time, high accuracy, and the price can be accepted by the majority of manufacturers ointments weight real-time detection system is particularly important, the issue is presented based on the above requirements . In order to achieve real-time creams weight , high-precision detection, this paper proposes a transmissive optical detection scheme , and from the principle and system design programs for research and experimental analysis . Plaster thickness uniformity to some extent reflects the creams ointments on the weight . In this thesis, a plaster thickness uniformity of line detection system , and for the plaster their nature , testing environment and system design technical requirements of each of the light source system , the optical signal detection system design and research . A light source system , the author explores the main beam to obtain a uniform speed of several methods, including the LED light uniformity test , broadband design and LED spot to spot superimposed uniformity analysis , presented to the light source is frequency modulated to enhance system anti-interference ability and innovative ideas ; optical signal detection system , the author mainly designed LED driver with modulation, optical receiver , preamp , filter circuit, proposed using differential detection method , and system hardware design PCB board ; theoretically proved plaster thickness and amplitude of the signal processing circuit outputs a linear relationship was a single value for the experimental results provide an important basis . Finally , the actual production of the plaster thickness measurement test system of the standard size of 7cm × 12cm, the weight of the plaster creams with different experiments for testing , analysis of experimental results : The system has to meet the design specifications , to meet the measurement requirements .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Centralized testing and roving detection system
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