Research On Key Equipment For Automatic Detection Of Visible Light Communication Devices

With the continuous maturity of Visible Light Communication(VLC)technology,VLC devices are becoming more and more popular,but no special detection devices for VLC devices are appeared.For this reason,the dissertation with the topic “Research on the key equipme nt of automatic detection of visible light communication device” is proposed.The dissertation focuses on the study of the key detection parameter system and measurement mechanism of visible light communication devices.And the design of VLC anti-stray interfere nce performance analyzer,VLC receiving performance analyzer and VLC emission light source modulation performance analyzer are studied.The research work has important academic and practical significance for promoting the development of measurement and control technology and instruments,equipment manufacturing technology and other disciplines.The research work was supported by the project of Key Project Development and Integration Demonstration of VLC Equipment Performance Inspection System(No.201604046005),a major project of collaborative research and innovation in Guangzhou.The dissertation studies the key equipment of ful y automatic detection of visible light communication devices.The research progress at home and abroad is reviewed from the aspects of visible light communication modulation technology,visible light communication link technology and visible light communication receiving technology to determine the research content.The primary work includes:(1)The specific detection parameters and the their physical definition are determined according to the performance requirements of the modulation and modulation performance,anti-stray interference performance and reception performance of the VLC devices and the key detection parameter system of the VLC devices is proposed.The parameter measureme nt mechanism of the key equipment for detecting those performances is studied,whose detection schemes and test procedures of each parameter are proposed as well.(2)According to the anti-stray interference performance detection requirements of VLC devices,VLC anti-stray interference performance analyzer is designed.An instrument optical path that meets the detection and analyzes its mathematical model is proposed.The precision of the instrument is designed to meet the requirement of the total error less than or equal to 2%.The instrument body device electromechanical system is designed and key components are selected.Finally,the instrument control and information processing platform is finished by using LabVIEW.(3)According to the receiving performance detection requirements of the VLC devices,the VLC receiving performance analyzer is designed,and an optical path is designed and analyzed.The precision of the instrument is designed to meet the requirement of the total error less than or equal to 2%.The electromechanical system of the main device is designed and the key components are selected,and the Python programming language is used to complete the communication between the host computer with the illuminance meter,and PLC host computer.And the GUI interface is also designed.(4)According to the requirements of VLC device source emission modulat io n performance detection,the VLC emission source modulation performance analyzer is designed.The circuits of the transmitting end and receiving end are designed.The circuit of transmit t ing end includes: signal generating module,signal amplifying module and constant current source driving module,etc.The signal amplifying module in the receiving end circuit use the mutual impedance preamplifier structure.And the control system and the modulation performance analysis system are introduceed and the key components are selected.LabVIEW is used to control the main core component Hantek 6254 BD to complete the software system.(5)Design an universal and compatible automatic measurement scheme for VLC devices.The intelligent judgment technology is proposed and VLC devices are tested.And a few representative VLC devices are applied to the VLC anti-stray interference performance analyzer and VLC receiver performance analyzer to complete the automatic parameter measurement.