7 results about "Angular response" patented technology

The invention relates to a method for radiation detection chip angle response compensation. The method comprises the following steps: step 1, testing the counting rate of deposition of each channel of array SiPM when gamma rays have different incident angles; 2, according to a standard dose rate value and the counting rate of each channel of the array type SiPM at different incident angles obtained in the step 1, constructing a linear equation set; 3, solving the system of linear equations in the step 2 to obtain an angle response correction matrix; and 4, correcting the angle response of the chip according to the angle response correction matrix in the step 3. According to the invention, the angle response compensation of the thin-layer scintillator radiation detection chip on the directional dose rate of different incident angles is realized, and the problem of measurement deviation of the radiation detection chip caused by the change of the incident angle of the radiation source is solved.

The application discloses a center-of-gravity driving aircraft precise attitude regulation method and system, and particularly relates to the field of aircraft attitude control technology, and is used for solving the problem of high operation threshold and easy loss of control of man-machine coupling in a complex environment. First, cabin pressure distribution data is collected and frequency domain decoupling is performed, and a real low-frequency intention driving vector and an associated high-frequency jitter feature are accurately separated. Then, the intention is mapped to a flow field coordinate system that fuses terrain and airflow to perform aerodynamic interference impedance analysis, generate an aerodynamic impedance compensation matrix, and avoid collision risks. The high-frequency jitter and the expected body angular response matching resonance band are extracted, a dynamic anti-oscillation damping coefficient is output, and resonance is suppressed. Finally, multi-dimensional parameters are input into a nonlinear control solver to perform joint optimization and generate a thrust distribution sequence for execution, thereby constructing a regulation closed loop from intention decoupling to physical execution, and ensuring extreme smoothness and flight safety in an extremely simple operation mode.

The application relates to a fast prediction method and device for sound scattering characteristics of a complex target under limited beam incidence, which comprises the following steps: constructing a three-dimensional geometric model of the complex target, and dividing the surface into a triangular facet grid; based on the set incidence parameters of the limited beam, calculating the included angle between the direction vector of the triangular facet to the sound source and the beam direction vector, and screening the illuminated facets in response to the included angle being less than half of the beam angle; calculating the scattering contribution of all the screened illuminated facets in the frequency domain, coherently superimposing the scattering contribution, obtaining the frequency domain scattering sound field of the complex target under the limited beam incidence, and interpolating the frequency domain scattering sound field in the wideband frequency range to obtain the wideband scattering response, and calculating the wideband time domain scattering waveform of the complex target under the limited beam incidence. The application can be applied to the near-field incidence condition of the limited beam, can consider the calculation accuracy and efficiency, and can process the underwater target sound scattering characteristics of the complex target geometric shape.

The utility model discloses a CZT detector test angle response measuring device, which relates to the technical field of semiconductor testing and comprises a base, a fixing mechanism, a measuring cover, a driving mechanism and a plurality of radioactive sources. The fixing mechanism is installed on the base and used for fixing a to-be-tested piece. The measuring cover is hemispherical, is rotationally mounted on the base and is used for covering the fixing mechanism; a plurality of placing holes are formed in the measuring cover and are used for installing radioactive sources in a one-to-one correspondence manner; the driving mechanism is installed on the base, connected with the measuring cover and used for driving the measuring cover to rotate. By means of the design, testing at different angles is achieved, the testing efficiency is improved, and meanwhile comparison parameters of multiple angles can be measured through one device.

The invention discloses an image processing method, system and device and a computer readable storage medium, and relates to the technical field of computer vision and target detection, and the method comprises the steps: obtaining a to-be-detected image; in the to-be-detected image, determining an initial orientation bounding box of the to-be-detected object; determining a main axis direction of the to-be-detected image and a stability coefficient of the main axis direction; generating a critical deflection angle of the initial directional bounding box based on the stability coefficient; determining a direction included angle between the initial directional bounding box and the main axis direction; and in response to the fact that the direction included angle is smaller than the critical deflection angle, deflecting the initial orientation bounding box to the main axis direction to obtain a target orientation bounding box of the to-be-detected object. The stability coefficient reflects the deflection strength in the main axis direction, so that the critical deflection angle is matched with the deflection strength in the main axis direction, the accuracy is higher, then the target orientation bounding box consistent with the main axis direction can be obtained, the direction of the to-be-detected object can be adaptively adjusted, and the stability and precision of direction detection of the image are improved.

This invention discloses a fuzzy calibration method for photoelectric angle sensors based on ANSYS simulation, belonging to the field of fuzzy calibration technology for photoelectric angle sensors. The method includes the following steps: Based on the identification results, the nodal displacement data as a function of angle from the sensor simulation output are retrieved to construct a family of periodic displacement offset fitting functions. Curve fitting processing is then performed on one rotation data to determine the angular response skew caused by structural eccentric loading under conditions where no non-axisymmetric loading is set during the simulation. Based on the determined angular response skew results, a residual attention-enhanced Transformer structure is constructed to extract the error change trajectory feature set from the structural skew envelope, and a drift discrimination result reflecting the direction, level, and stability of structural error drift is output. This invention solves the problem of error modeling distortion in photoelectric angle sensors under non-axisymmetric loads and achieves error drift feature identification and dynamic accuracy control.

The application provides a detection system, a detection method and a smart sensor for the smart sensor. The detection system comprises a multi-dimensional adjustment platform having a bearing surface corresponding to a mechanical reference surface of a to-be-detected smart sensor; a laser collimator arranged on the multi-dimensional adjustment platform, an optical path of the laser collimator being known to the angle of the bearing surface; a blackbody radiation source arranged separately from the multi-dimensional adjustment platform; and an oscilloscope for measuring a sensor output signal, wherein the multi-dimensional adjustment platform is capable of being displaced along a first axial direction and a second axial direction respectively and is capable of being rotated around a first axis and a second axis respectively, the first axial direction and the second axial direction being perpendicular to each other and being perpendicular to the optical path of the laser collimator respectively. The detection system is capable of directly measuring a plurality of technical indexes of the sensor, including at least one of a sensor visual axis, a field of view angle, a response rate, a noise equivalent temperature difference, an upper edge frequency and a lower edge frequency, thereby providing an efficient, reliable and consistent detection means for sensor incoming inspection, production and manufacturing and product delivery inspection.