Analysis and design of ground-based photoelectric detection system for star observation during the daytime

2019 ◽  
Author(s):  
Yue Yu ◽  
Yan Tian ◽  
Hao Wei ◽  
Li Zhe
Keyword(s):  
Detection System ◽  
Analysis And Design ◽  
Photoelectric Detection

The Effect of Laser Focus Position on Laser Induced Plasma Characteristics

2014 ◽  
Vol 1035 ◽  
pp. 508-513
Author(s):  
Meng Ke Lu ◽  
Shu Rui Zhao ◽  
Kui Wen Guan ◽  
Yan Ling Wang
Keyword(s):  
Short Pulse ◽  
Detection System ◽  
Spectral Lines ◽  
The Self ◽  
Focus Position ◽  
Laser Induced Plasma ◽  
Photoelectric Detection ◽  
Complex Process ◽  
Laser Focus ◽  
Plasma Characteristics

Laser induced plasma is a relatively complex process which is closely related to many factors. In this paper, using a short pulse Nd:YAG laser and CCD photoelectric detection system, the variation of laser focus position effected by spectral intensity, the ratio of signal to background as well as the self-absorption of the plasma spectral lines with the standard spectra sample of aluminum for analysis samples was studied. Results show that: when the laser focus position is about 5mm under the surface of the sample, the relative intensity and the ratio of signal to background of the spectral lines are the strongest, and the spectral lines are sharp without obvious self-absorption.

Stray Light Analysis of Solar Photoelectric Detection System on Space Target

2012 ◽  
Vol 466-467 ◽  
pp. 196-200
Author(s):  
Ling Yin Li ◽  
Yi Fan Wang ◽  
Xiao Gang San
Keyword(s):  
Mechanical Model ◽  
Detection System ◽  
Stray Light ◽  
Coating Technology ◽  
Detection Systems ◽  
Geometry Model ◽  
Photoelectric Detection ◽  
System Requirements ◽  
System Geometry ◽  
Telescope System

Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation, build up evaluation index of stray light system, to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created, and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle, baffle vane and the coating technology. In order to verify the prosperity of structure that designed, we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile, the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually, and so measurement precision was improved from detection graphics.

Exploration on Applying Non-Contact Photoelectric Detection Method for Double-Enveloping Hourglass Worm

2010 ◽  
Vol 97-101 ◽  
pp. 4287-4292
Author(s):  
Shu Yuan Zhang ◽  
Xiao Jing Chen ◽  
Song Kun Yu ◽  
Ting Chen Chen
Keyword(s):  
Light Source ◽  
Detection Method ◽  
Detection System ◽  
Image Sensor ◽  
Tooth Surface ◽  
Rotary Table ◽  
Ccd Imaging ◽  
Photoelectric Detection ◽  
Manufacturing Accuracy ◽  
Work Table

According to the principle of processing, a non-contact photoelectric detection method for double-enveloping hourglass worm is investigated. The structure of the detection system is designed. It consists of solid-state image sensor CCD and light source. The parallel light source is installed on a sliding-board which is fixed on the rotary table. There is an inclination angular β between the parallel light source and the plane of the work table. The industrial CCD lens is mounted on the other side of the worm through a frame. The plane of the CCD is vertical to the parallel light source. Therefore CCD imaging is along with the direction of the generating process surface. By comparing the measured spiral tooth surface with the standard spiral tooth surface, the manufacturing error of worm can be calculated. Manufacturing accuracy of the worm can be obtained. Based on the four-axis CNC grinder, Non-contact photoelectric detection method is studied through preliminary experimental study. The experimental results indicate that this method is feasible in the precise detection of the double-enveloping hourglass worm.

Design of quadrant photoelectric detection system and method of displacement calculation

Optik ◽  
2019 ◽  
Vol 199 ◽  
pp. 163335
Author(s):  
Hao Yang ◽  
Xiaobin Xu ◽  
Minzhou Luo ◽  
Qinyang Qu ◽  
Min Zhang ◽  
...  
Keyword(s):  
Detection System ◽  
Photoelectric Detection

Target infrared radiation calculation model and method based on finite element analysis method in infrared photoelectric detection system

Sensor Review ◽  
2017 ◽  
Vol 37 (1) ◽  
pp. 26-32
Author(s):  
Hanshan Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Infrared Radiation ◽  
Detection System ◽  
Calculation Model ◽  
Analysis Method ◽  
Element Analysis ◽  
Content Type ◽  
Finite Element Analysis Method ◽  
Photoelectric Detection

Purpose The purpose of this paper is to evaluate the detection performance of infrared photoelectric detection system and establish stable tracking platform. Design/methodology/approach This paper puts forward making use of the finite element analysis method to set up the infrared radiation characteristics calculation model of flying target in infrared photoelectric detection system; researches the target optical characteristics based on the target imaging detection theory; sets up the heat balance equation of target’s surface node and gives the calculation method of total radiation intensity of flying target; and deduces the target detection distance calculation function; studies the changed regulation of radiation energy that charge coupled device (CCD) gain comes from target surface infrared heat radiations under different sky background luminance and different target flight attitude. Findings Through calculation and experiment analysis, the results show that when the target’s surface area increases or the target flight velocity is higher, the radiation energy that CCD obtained is higher, which is advantageous to the target stable detection in infrared photoelectric detection system. Originality/value This paper uses the finite element analysis method to set up the infrared radiation characteristics calculation model of flying target and give the calculation and experiment results; those results can provide some data and improve the design method of infrared photoelectric detection system, and it is of value.

Design for Detection System of Landslides Based on SCM

2013 ◽  
Vol 331 ◽  
pp. 622-625
Author(s):  
Gao Zheng Li ◽  
Cheng Liu ◽  
Guo Hong Cao ◽  
Nan Yu
Keyword(s):  
Software Design ◽  
Detection System ◽  
Hardware Design ◽  
Dynamic Monitoring ◽  
Main Function ◽  
Analysis And Design ◽  
Remote Monitoring System ◽  
Main Work ◽  
System Module ◽  
And Control

In order to understand all data of landslides as much as possible, such as the time, place, scale and destructive power, a kind of Remote monitoring system of Landslides based on SCM was designed. The main function is for the purpose of dynamic monitoring of landslide timely and effectively. The main work include hardware design, software design and circuit debugging of the system. In the system, hardware design mainly consists of the analysis and design of landslides data acquisition module and data processing and control system module circuit; Software design is to refer to the compilations of various system modular program; Circuit debugging refers to the process of debugging the program running in the system to ensure that the department of the system can work normally.

scholarly journals Analysis of Assembly Error Effect on Stability Accuracy of Unmanned Aerial Vehicle Photoelectric Detection System

2020 ◽  
Vol 10 (7) ◽  
pp. 2311
Author(s):  
Keyan He ◽  
Huajie Hong ◽  
Guilin Jiang ◽  
Haipeng Gu
Keyword(s):  
Manufacturing Process ◽  
Detection System ◽  
Analysis Method ◽  
Process Improvements ◽  
Deviation Analysis ◽  
Photoelectric Detection ◽  
Key Performance Index ◽  
Typical Type ◽  
Aerial Vehicle ◽  
Assembly Error

A photoelectric detection system is a typical type of device widely used for detecting purposes based on unmanned aerial vehicles (UAV). Stability accuracy is the key performance index. Compared to traditional analysis methods aimed at unpredictable error-causing sources, assembly errors can be easily controlled during the manufacturing processes. In this research, an analysis method of assembly error effect on stability accuracy is proposed. First, by using kinematics analysis of homogeneous coordinate transformation, stability accuracy is comprehensively modeled and simulated. Then, by analyzing the manufacturing process, assembly errors of axis perpendicularities, run-outs and gyroscopes are defined and modeled. By simulating different carrier movements, the effects caused by assembly errors under various environments are studied. Finally, error sensitivity is proposed by using standard deviation analysis. Results show that the most sensitive assembly errors are identified, and ranked in order of sensitivity as follows: x-component of pitch axis perpendicularity, y-component of the azimuth gyroscope assembly, and z-component of the pitch gyroscope assembly. In conclusion, the results can be used as standards of manufacturing process improvements, and the proposed methods can be used to provide valuable references for real application scenarios.

Photoelectric detection system of inside flaws of metal tube

2000 ◽  
Author(s):  
Dong Lu ◽  
Yang Xiang ◽  
Guangwei Zhang ◽  
Dachuan Yu
Keyword(s):  
Detection System ◽  
Metal Tube ◽  
Photoelectric Detection
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