10results 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.

A broadband athermal optical system based on a global surface lens is characterized by the following components arranged sequentially from the outside to the inside along the light propagation direction: a protective window, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a detector photosensitive surface (image plane). The protective window, first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens are coaxially arranged with the detector photosensitive surface (image plane). The optical system receives visible light reflections and short-wave infrared radiation information inherent to the target and background, and converges them onto the detector photosensitive surface for photoelectric conversion. It exhibits high sensitivity and relatively low spatial resolution, enabling target detection, identification, and precise positioning under all-weather and complex meteorological conditions. This invention belongs to the field of optical imaging technology. The optical system exhibits excellent imaging quality, strong light-gathering ability, and good environmental adaptability within a wide spectral and temperature range of 0.4μm to 2.3μm and -50℃ to +70℃. It features simple structure, easy assembly and adjustment, high reliability, low cost, good manufacturability, and high yield. It can be widely used in aerospace optical remote sensing, ground-based target tracking and detection, optical imaging guidance, astronomical observation, industrial multispectral imaging analysis and non-destructive testing, and civil security surveillance, with broad application prospects and significant economic benefits.

This disclosure presents an integrated navigation system combining a BeiDou front-end and a radar front-end, comprising a backplane mechanism; a radar antenna structure mounted in the middle of the backplane mechanism; and a BeiDou antenna structure mounted on the top of the backplane mechanism. Using an exemplary embodiment of this disclosure, supporting foam is added above the BeiDou antenna and the radar antenna to support the metamaterial above the antenna. Because the dielectric constant of the foam is close to that of air, it allows for good matching between the antenna and the metamaterial, enabling the metamaterial to enhance antenna gain and thus improve the overall system's signal reception capability. Alternatively, the antenna itself and the metamaterial can form an integral structure. The exemplary embodiment of this disclosure enables the integration of the BeiDou satellite navigation system and the radar obstacle avoidance system without altering the original navigation radar mechanism, and enhances radar power, giving it a longer detection range.

The application discloses a low-cost mid-wave refrigeration athermalization optical system based on a silicon germanium material, which sequentially comprises a fairing, a first lens, a second lens, a third lens, a detector protection glass, a cold light diaphragm and an image plane from outside to inside in the propagation direction of light. The first lens, the second lens, the third lens, the detector protection glass, the cold light diaphragm, the image plane and the fairing are coaxially arranged. The optical system is used for receiving infrared radiation inherent to a target and a background, and converging the infrared radiation onto a photosensitive surface of a refrigeration detector to realize photoelectric conversion, so that the target can be detected, identified and accurately positioned at night or under complex weather conditions. The application belongs to the technical field of optical imaging, can adapt to a harsh missile-borne working environment with a wide temperature range of 110 DEG C and high impact overload, has the characteristics of simple structure, excellent imaging quality, high resolution, strong environmental adaptability, good processing process, easy assembly and adjustment and high yield, is suitable for mass production, and can be widely applied to the fields of optical imaging guidance, search, tracking and reconnaissance.

The application belongs to the technical field of ground penetrating radar detection, and particularly relates to a multi-channel chaotic ground penetrating radar device for city road disease detection, which solves the technical problems of poor anti-interference ability of the existing multi-channel pulse ground penetrating radar and the problem that the multi-channels cannot work in parallel, wherein the signal generation unit comprises a pulse signal generation module and a chaotic pulse signal generation module; the transmitting and receiving unit comprises N transmitting and receiving subunits, each of which comprises a local oscillator signal generator, a three-way power divider, a first / second / third frequency mixer, a first / second power amplifier, a first / second transmitting antenna, a receiving antenna, a low-noise amplifier and a signal acquisition subunit; the signal matching unit comprises N signal matching subunits, each of which comprises a pulse detector and a pulse interval matching module; and the clock control unit is connected to the pulse signal generation module, the chaotic pulse signal generation module, the signal matching subunit and the transmitting and receiving subunit respectively.

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.