5 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.