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172results about How to "Generate flexible" patented technology

Method for generating vortex light beam by use of calculation hologram

The invention discloses a method for generating a vortex light beam by use of a calculation hologram. The steps comprise: (1), utilizing a monocyclic Laguerre-Gaussian (LG) vortex light beam in a source plane (z=0m) coordinate system; (2), performing conjugate symmetrical extension on the complex amplitude of the vortex light beam, and obtaining symmetrical vortex light beam complex amplitude distribution; (3), performing Fourier transformation on the conjugate symmetrical vortex light beam complex amplitude distribution to obtain two-dimensional discrete real function distribution, performing DC component inhibition on real functions, and coding to form the vortex light beam calculation hologram; (4), performing Fourier inverse transformation on the calculation hologram, obtaining the light intensity distribution and the phase distribution of the vortex light beam, and taking the left half portions of the light intensity distribution and the phase distribution as the vortex light beam for digital reconstruction; and (5), loading the vortex light beam calculation hologram on a spatial light modulator, modulating incident laser and reconstructing the vortex light beam in a photoelectric mode. The method employs a conjugate symmetrical extension Fourier calculation holographic algorithm, the algorithm is rapid and simple, the calculation efficiency is high, and sidelobe-free high-quality vortex light beams can be generated.
Owner:SHANGHAI UNIV

Parameter-adjustable PWM controller based on programmable device and PWM pulse generation method

The invention belongs to the field of power electronics, and discloses a parameter-adjustable PWM controller based on a programmable device and a PWM pulse generation method, the parameter-adjustablePWM controller comprises a human-computer interface, a DSP and the programmable device, and the human-computer interface is used for inputting PWM pulse preset parameters; the DSP is used for receiving PWM pulse preset parameters input by the human-computer interface and outputting the PWM pulse parameters; the programmable device is used for receiving the PWM pulse parameters output by the DSP and generating PWM pulses according to the PWM pulse parameters. Input adjustment of various parameters is carried out through a human-computer interface, the flexibility is high, smooth switching is achieved when the parameters change, no narrow pulse occurs, and safe and stable operation of equipment is guaranteed; according to the invention, the limitation of a DSP chip is overcome, the programmable device has the characteristic of field programmability, various functions can be realized through a hardware description language, and meanwhile, the programmable device can simultaneously processa plurality of tasks in parallel, so that the real-time performance and the parallelism of a control system are improved.
Owner:XIAN XJ POWER ELECTRONICS TECH +2

Electric power Internet of Things protocol vulnerability detection system and method based on fuzzy testing

The invention provides an electric power Internet of Things protocol vulnerability detection system and method based on fuzzy testing, and the system comprises a protocol configuration module which is used for configuring a detected protocol and configuring a data frame under the detected protocol; a sample generation module which is used for carrying out variation strategy configuration according to the loaded protocol after the protocol and the data frame configured by the protocol configuration module are loaded, and generating a test sample according to the configured variation strategy; and an execution monitoring module which is used for transmitting the test sample generated by the sample generation module into detected equipment for testing, performing link management, executing the test, and finally storing a test result and generating a detection report. Three main modules of detected protocol management, variation strategy configuration and detection detail query are taken as a core, a fuzzy test detection process is constructed, an electric power Internet of Things industrial control protocol vulnerability detection prototype system is formed, and protocol configuration and test can be conveniently, rapidly and effectively performed.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +1
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