7 results about "Transition edge" patented technology

This invention discloses a method and system for calculating the number of revolutions in a BLDC motor based on dynamic time window verification, belonging to the field of motor control technology. The method includes: acquiring Hall sensor signals from the BLDC motor and performing edge detection and debouncing processing to generate Hall transition edges; obtaining the current period by measuring the time interval between adjacent valid Hall transition edges based on the system clock; calculating the lower and upper bounds of the dynamic time window based on the current period and a dynamic adjustment coefficient; and performing three-level pulse discrimination based on the relationship between the arrival time of the Hall transition edge and the dynamic time window: triggering revolution count accumulation when the pulse is determined to be valid, blocking the pulse when it is determined to be a glitch pulse, and generating a compensation pulse and triggering revolution count accumulation when the pulse is determined to be lost. This invention solves the problems of insufficient anti-interference capability and lack of signal loss compensation mechanism in existing technologies under variable speed conditions and strong electromagnetic interference environments, significantly improving the accuracy and reliability of revolution count calculation.

This invention relates to the field of waveguide gas laser technology, specifically to a method and device for preferentially controlling the electrode electric field to prioritize the lowest-order waveguide mode through coating, comprising the following steps: S1: determining the beam waist position of the laser resonator; S2: preparing an insulating coating on the surface of the waveguide laser electrode plate corresponding to the beam waist position; S3: performing a gradient transition edge treatment on the insulating coating; S4: constructing an impedance matching compensation network at the electrode feed end in the insulating coating region. This invention, by setting an insulating coating, achieves localized reduction of the electric field intensity in the beam waist region; simultaneously, by constructing an impedance matching compensation network, it accurately compensates for the capacitance effect introduced by the coating, and through dynamic monitoring and adjustment, ensures that the standing wave ratio and discharge voltage fluctuations are within a minimal range, guaranteeing effective coupling of RF power and uniform and stable discharge, thereby improving the overall efficiency and reliability of the device.

This invention relates to a testing method, system, computer device, and storage medium for electronic devices. The method includes: receiving user-defined test parameters through a graphical configuration platform; generating a structured test file based on the test parameters, the structured test file including a directed graph model consisting of nodes and transition edges to describe the test process, wherein the nodes indicate test states and / or test actions, and the transition edges indicate state triggering conditions; loading and interpreting the structured test file, generating standardized action instructions based on the interpretation results, converting the standardized action instructions into a control protocol for a specific physical test device, driving the electronic device to perform corresponding test actions according to the nodes of the structured test file, and transferring test states according to the transition edges defined in the directed graph model. This invention enables streamlined and automated testing of electronic devices.

This invention provides a calibration system and radar for delay calibration of TDC timing channels. The calibration system sends periodic signals to each carry-chain timing channel via a clock generator, enabling each carry-chain timing channel to monitor the transition edge of the same periodic signal. The calibration module subtracts the trigger times of the transition edges of the same periodic signal obtained by each pair of carry-chain timing channels to obtain the delay time between each pair of carry-chain timing channels. Thus, when calculating the time difference between the output times of any two carry-chain timing channels, the system calibrates the time difference based on the delay time, improving the accuracy of the time difference output by the carry-chain timing channels and thereby improving the radar monitoring accuracy.

This invention provides a mechanical and optical dual-modal sensor and intelligent detection method. The technical solution involves separately mounting flexible photoelectric detection patches and flexible mechanical sensing patches on different flexible substrates, and introducing a high-stiffness optical window in the photoelectric measurement area to cut off the deformation transmission path and stabilize the optical path. Simultaneously, a time-series collaborative sampling mechanism under a unified time reference is introduced into the control and processing module to avoid the light source-driven transition edge of the mechanical signal sampling window. Furthermore, at the data processing level, an exponential compensation model based on the dynamic response characteristics of the physical system is established, and the steady-state value of the system is extracted by inverse fitting using unstable transient observation sequences, thereby reconstructing the true muscle force mechanical signal. This invention can solve the technical problems of mechanical deformation coupling and electromagnetic crosstalk between the photoelectric and mechanical modes in existing technologies.

The application relates to the fields of printed circuit board design and processing technology, and particularly relates to a printed circuit board and a printed circuit board assembly. The printed circuit board comprises: a substrate; and a transition edge located at at least one board edge of the substrate; the substrate is provided with a stress-sensitive area adjacent to the transition edge, at least one welding site for welding a stress-sensitive component is arranged in the stress-sensitive area, and a groove structure is arranged on the transition edge, the groove structure is located at a side of the welding site in a direction perpendicular to the extension direction of the transition edge and is adjacent to the substrate, and is used for limiting the transmission of stress generated when the transition edge is removed to the welding site. By actively weakening the local structure of the transition edge through the groove structure to limit the stress transmission, the influence of stress release when the transition edge is removed on the stress-sensitive component of the adjacent welding site is reduced, the damage risk of the stress-sensitive component is reduced, and the yield is improved.

This invention discloses a method for fast range ambiguity resolution of short-period direct-sequence spread spectrum signals used in radar measurement. The method comprises: 1) designing a square wave period based on the maximum unambiguous measurement range requirement; 2) transmitting a direct-sequence spread spectrum signal modulated with a square wave at the transmitting end; 3) estimating the code phase within the spread spectrum pseudocode period at the receiving end using fast circular correlation; and 4) despreading using the spread spectrum pseudocode phase estimation result and accumulating energy within the spread spectrum pseudocode period to obtain N. s The energy accumulation results are as follows: 5. The energy accumulation results within adjacent spread spectrum pseudocode periods are used to search for the square wave transition edge using a differential method to complete target detection decision and distance estimation; This invention can effectively improve the maximum unambiguous distance for capturing high dynamic weak signals, while resolving the contradiction between computing resources and acquisition time.