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1 WO2020007360A1
WAVEGUIDE-BASED DISPLAY MODULE, AND IMAGE GENERATION MODULE AND APPLICATION THEREOF
Publication/Patent Number: WO2020007360A1 Publication Date: 2020-01-09 Application Number: 2019094861 Filing Date: 2019-07-05 Inventor: Yao, Changcheng   Song, Haitao   Zhou, Xudong   Wang jiazhou   Assignee: CHENGDU IDEALSEE TECHNOLOGY CO., LTD.   IPC: G02B26/10 Abstract: Disclosed are a waveguide-based display module, and an image generation module and application corresponding thereto. Based on the principle of wavelength division multiplexing, an image generation unit modulates a mixed light beam that includes at least two groups of sub-images of different wavelengths. The mixed light beam modulated by the image generation unit is coupled into a waveguide module, which module has multiple layers of coupling-in units and multiple layers of coupling-out units, wherein each layer of coupling-in units is configured to couple in light of different wavelength ranges; and emitted images, which are formed by the coupling-out unit of the waveguide module coupling out a mixed light beam of an image to be displayed that is generated by the image generation unit, are spliced into the image to be displayed. The present invention solves the problem of taking both a large field of view and the miniaturization of a near-eye display module into consideration by means of a new idea.
2 US2020302054A1
Method for detecting physical intrusion attack in industrial control system based on analysis of signals on serial communication bus
Publication/Patent Number: US2020302054A1 Publication Date: 2020-09-24 Application Number: 16/755,163 Filing Date: 2019-01-22 Inventor: Liu, Ting   Liu, Pengfei   Wang jiazhou   Zhou, Yadong   Assignee: XI'AN JIAOTONG UNIVERSITY   IPC: G06F21/55 Abstract: A method for detecting physical intrusion attack in an industrial control system based on analysis of signals on serial communication bus is provided. This method comprises of actively sending a detection signal to communication bus via a bus controller in a serial communication bus network, sampling and analyzing signals on the communication bus by a monitoring device, performing differential comparison with a standard signal stored in the monitoring device database, detecting an intrusion signal in difference signal based on noise reduction technology and weak signal detection technology, and according to a detection result of the intrusion signal caused by an external device to effectively determine whether there is an external malicious device in the system, and whether the system is subjected to a physical intrusion attack.
3 WO2019200944A1
PHYSICAL INTRUSION ATTACK DETECTION METHOD FOR INDUSTRIAL CONTROL SYSTEM BASED ON SERIAL COMMUNICATION BUS SIGNAL ANALYSIS
Publication/Patent Number: WO2019200944A1 Publication Date: 2019-10-24 Application Number: 2018120178 Filing Date: 2019-01-22 Inventor: Liu, Pengfei   Liu, Ting   Zhou, Yadong   Wang jiazhou   Assignee: XI'AN JIAOTONG UNIVERSITY   IPC: G06F21/85 Abstract: Provided is a physical intrusion attack detection method for an industrial control system based on serial communication bus signal analysis. A detection signal is actively sent to a communication bus by means of a bus controller. After a monitoring device carries out sampling and analysis on signals of the communication bus, differential comparison is performed on the signals with a standard signal stored in a device database, and noise reduction technology and weak signal detection technology are used to detect an intrusion signal in difference signals. According to a detection result of an intrusion signal caused by a physical intrusion device, any external malicious device in a system can be quickly and effectively determined, and the security state regarding whether the system is subjected to a physical intrusion attack is determined. The technical problem that the network security of a serial communication bus of an industrial control system attacked by a physical intrusion cannot be effectively detected by an existing network defense method is solved.