3 results about "Rectilinear propagation" patented technology

The invention discloses a ground-hole combined electromagnetic wave CT three-dimensional exploration method based on wave equation inversion imaging, and the method comprises the following steps: 1, arranging an annular receiving array on the ground, and recording the position; step 2, an emission source is moved downwards according to a specified interval in the drill hole, and an electric pulse is emitted once each time; step 3, recording amplitudes of all receiving antennas on the ground; step 4, constructing a receiving data set; 5, constructing a fluctuation propagation forward modeling model; step 6, constructing an inversion objective function and using a gradient descent method to invert a dielectric constant body; and step 7, outputting the underground three-dimensional image, and identifying the karst abnormal body. Compared with a traditional ray path method, the full-wave inversion method based on the wave equation is higher in precision. The method does not depend on a linear propagation hypothesis, fully considers physical processes of wave interference, diffraction, reflection and the like, is closer to a real propagation behavior, and remarkably improves the imaging resolution and the reconstruction capability of the geometric boundary of the anomalous body compared with a traditional method.

This invention discloses a precise orbit determination and astronomical ranging method based on equivalent optical path bending correction using celestial body motion position offset, relating to the fields of aerospace telemetry and control and astronomical observation technology. This invention is based on the premise that light always travels in a straight line, abandoning the traditional approach of modeling light beams by gravitational self-deflection and spacetime curvature. It utilizes the fixed duration of light propagation, during which high-speed motion of celestial bodies generates misalignment of transmission and reception points, forming a real physical mechanism of equivalent optical path bending at the measurement level. The method models and calculates the offset and time delay corresponding to the equivalent bending, corrects errors in the original measured data, calculates the true absolute position of the target, deduces the orbit, and implements pre-orbit compensation for the satellite. This invention conforms to objective physical laws, has high correction accuracy, significantly reduces the frequency of satellite orbit fine-tuning, saves fuel and manual maintenance costs, requires no hardware modifications, and can be widely applied in aerospace telemetry and control, deep space exploration, and astronomical observation.

This invention provides a multi-directional illumination simulation device for edible mushroom cultivation. It includes a movable frame with a lifting cylinder mounted on it. A mounting plate is slidably installed inside the frame, and a motor is mounted above the mounting plate. A light is installed at the output end of the motor, which is connected to a gear via a belt drive mechanism. In this invention, by setting up a transmission mechanism, when the motor drives the light to rotate, it drives the reflectors to rotate in the opposite direction along the axis. Utilizing the rectilinear propagation characteristic of light, the light is effectively reflected to the shaded area of ​​the mushroom spawn, achieving multi-directional illumination and effectively eliminating growth differences caused by uneven light exposure, ensuring upright growth of the mushrooms. Furthermore, by rotating the threaded sleeve, the tilt angle of all reflectors can be adjusted simultaneously, flexibly controlling the direction of light reflection to meet the light requirements of different growth stages, making it practical and easy to operate.