6results about How to "Long detection distance" patented technology

The utility model provides an ultrasonic sensor structure of promoting detection distance, including shell, the utility model discloses the cooperation structure of coating piece and mounting bracket effectively guaranteed the free vibration state of piezoelectric ceramic piece in foamed colloid filling environment, mounting bracket and piezoelectric ceramic piece do not contact each other, and the piezoelectric ceramic piece of mounting rack top hollow portion inserts the coating piece and ceramic piece top and sticks together but does not produce rigid restraint, make the radial vibration of ceramic piece not be restrained by any solid structure's clamping or bonding, and coating piece will foamed colloid and ceramic piece completely isolate, avoid the damping effect that foamed colloid solidification and ceramic piece surface bonding produce, make ceramic piece can vibrate freely with maximum amplitude, and the electric energy is converted into sound energy and radiates outward with maximum limit, and coating piece as sound matching layer can also reduce the sound wave reflection loss caused by sound impedance difference, further promote sound energy transmission efficiency.

This invention relates to the field of intelligent rail transit technology, providing a track detection method, apparatus, electronic device, and storage medium. The track detection method includes: obtaining target image data representing a track region from image data acquired by a camera; obtaining target point cloud data representing the track region from point cloud data acquired by a lidar based on the camera parameter matrix and the target image data; extracting a transformation matrix from the lidar coordinate system to the track plane coordinate system based on the target point cloud data; obtaining target track data generated by projecting the target image data onto the track plane based on the camera parameter matrix and the transformation matrix; and fitting a target track equation based on the target track data. This invention's track detection scheme combines the sensing capabilities of lidar with the motion-distortion-free and pixel-dense characteristics of camera imaging, improving track detection accuracy, increasing track detection distance, and efficiently and accurately obtaining track detection results.

The invention provides a safety detector and a safety detection method, the safety detector comprises a magnetic detection subsystem, and the magnetic detection subsystem comprises a magnetic detection front-end circuit, an instrument amplification circuit, a filter amplification circuit and a threshold comparison circuit; the magnetic detection front-end circuit is used for sensing a first voltage corresponding to the to-be-detected object when the to-be-detected object passes through the safety detector and outputting the first voltage; the instrument amplification circuit is used for performing differential amplification on a second voltage corresponding to the first voltage to obtain a third voltage and outputting the third voltage; the filtering and amplifying circuit is used for filtering the third voltage to obtain a fourth voltage and outputting the fourth voltage; the threshold comparison circuit is used for detecting whether the fourth voltage is in a threshold interval or not; if not, a prompt signal is output, and the prompt signal indicates that the to-be-detected object carries the detection target. According to the technical scheme, the safety detector is high in signal-to-noise ratio and long in detection distance.

The utility model discloses an induction type ceiling lamp which comprises an inductor, an installation disc, a diffusion ring, a back plate, a light source belt, a shell, a light source plate, a light-transmitting panel and a power source driver. A light source belt is laid around the edge of the upper surface of the light source plate; the light source plate with a light source belt is arranged at the bottom of the back plate; the light-transmitting panel is assembled in the shell and is positioned below the back plate in the shell; the diffusion ring is arranged on the upper surface of the back plate; a power supply driver and a sensor are assembled on the inner side of the mounting disc, and the mounting disc is fixedly connected with the back plate through a fastener; and the back plate is provided with a light outlet hole site. According to the utility model, the microwave sensor is adopted to control the work, the sensitivity is high, the detection distance is long, the influence of light, temperature and airflow is small, and the spatial position of a target and the movement of a human body can be detected in a larger spatial range, so that the lamp is controlled to be automatically turned on and turned off, intelligence and energy conservation are achieved, and the practicability and intelligence are remarkably improved.

The application discloses a kind of single-pixel imaging method and device based on array light source, including obtaining the illumination light field of array light beam and the back light intensity detection value of the reflection back after array light beam irradiation on target object;Based on back light intensity detection value and illumination light field, reconstruct target image as rough target image;Based on rough target image and back light intensity detection value, reconstruct target image using depth neural network without training, output final target image.The present application realizes high efficiency imaging and long distance target detection based on array light source, while removing image noise, artifact and periodicity by introducing depth neural network, further improves the imaging quality and imaging efficiency of single-pixel imaging.

The application belongs to the technical field of optical imaging, and particularly relates to a small-F-number long-waveband infrared imaging optical system, which comprises an aperture plane, a first lens, a second lens, a third lens and an image plane; the first lens is a positive lens made of IRG206 material, and the second surface thereof is an aspheric surface; the second lens is a negative lens made of ZNS_IR material; and the third lens is a positive lens made of IRG204 material; the application adopts a 3-lens structure, has low material cost, high system transmittance, long detection distance, small relative aperture and F number=1; and expensive germanium material is replaced by low-cost materials such as zinc sulfide (ZNS_IR) and chalcogenide glass (IRG206), so that the application has the advantages of cost and mass production.