1489 results about "Sight" patented technology

The invention discloses an AUV (Autonomous Underwater Vehicle) path tracking method based on predicted line-of-sight angle guidance, which comprises the following steps: acquiring a real-time navigation state through inertial navigation, acoustic positioning and DVL fusion, introducing a fixed time disturbance predictor to estimate a sideslip angle and an ocean current velocity component on line, adaptively adjusting a line-of-sight distance according to transverse error-navigational speed-curvature, and tracking the path of the AUV. Calculating a predicted line-of-sight angle and outputting an expected heading; and then a propeller and a control surface are driven by adopting a fixed time feedback control law, so that track and attitude error fixed time convergence of the under-actuated AUV under the conditions of strong time-varying ocean current and large sideslip is realized. The method does not need a side thruster or an ocean current prior model, is simple in algorithm structure, is suitable for a high-speed high-curvature track, and has the advantages of high speed, high steady-state precision, low energy consumption and high robustness.

In estimating a position of a vehicle utilizing a global navigation satellite system (GNSS), it is desirable to exclude outliner GNSS measurements due to navigation signals via non-light-of-sight paths from the GNSS to the vehicle, but it leads to a distorted satellite geometry distribution. Complementariness between low-lying visual landmarks and healthy but high-elevation satellite measurements is explored to improve the geometry constraint. Measurements of an inertial measurement unit, low-lying visual landmarks captured by a forward-looking camera onboard the vehicle, and healthy but high-elevation satellite measurements are tightly-coupled integrated via sliding window optimization of system states used in a factor graph. To improve estimation performance, good initial guesses of system states are important. As such, initial guesses of velocity set and position set inside a sliding window are estimated simultaneously based on data of Doppler measurement, double-differenced (DD) pseudorange measurement and DD carrier-phase measurement as obtained in GNSS measurements.

Provided is a compressible cam lever that has a section that can be compressed by external force. When the external force is released, elastic force within the cam lever causes the section to return back to its original position creating a spring force. The compressible cam lever may be used as part of a handle for opening and closing a clamp that is part of a tripod or other piece of equipment which can hold rails for firearms, sights, scopes, parts, and the like, therein. The compressible cam lever may include a handle, a round-shaped section comprising a flexible curved surface that curves back towards the handle and protrudes outward, and an opening disposed between an end of the flexible curved surface and the handle.

A slide for a firearm includes a top surface and an optical sight mounting surface recessed into the top surface of the slide. At least one pin opening is defined through a portion of the optical sight mounting surface and is configured to receive a pin for attaching an optical sight to the slide. At least one sight attachment opening is defined through the optical sight mounting surface to serve as another connection point for the optical sight. The pin opening and the sight attachment opening allow the optical sight to be attached directly to the slide of the firearm.

An apparatus and methods are provided for a gunsight and sighting system for use on firearms. The gunsight and sighting system comprises a mount portion coupled with a hood portion. A projection window with a collimated image overlay is secured to the mount portion by the hood portion. A front sight dot is forward of the projection window, while two rear sight dots are rearward of the mount portion. The sight dots may be illuminated by any of various desirable colors to enhance visibility in various lighting conditions. Light sensors disposed at the front of the mount portion detect ambient light and / or light in a target area and accordingly adjust the illumination of the sight dots. The light sensors may be disposed in asymmetric locations of the mounting portion to overcome interference due to light arriving at angles other than in front of the gunsight and sighting system.

The invention relates to the field of advanced guidance control of aircrafts, and discloses a terminal angle and view field constraint three-dimensional guidance law and system for intercepting a maneuvering target, and the specific steps are as follows: firstly, designing a sight angle rate profile expected to be tracked, and then designing a terminal angle and view field constraint guidance law of preset time. The advanced preset time control technology and the novel sight angle rate forming technology are adopted for achieving aircraft guidance control, the guidance law with the terminal angle and view field constraint is designed, and the maneuvering target can be intercepted at the expected terminal angle.

The invention discloses a multi-source fusion positioning method, positioning system and equipment for resisting non-line-of-sight interference. The method comprises the following steps: S1, acquiring RSS (Received Signal Strength), TDOA (Time Difference Of Arrival) and AOA (Attention Of Arrival) of N base stations; s2, selecting a base station with the strongest signal as an initial reference station according to the RSS mean value, and generating all base station combinations containing the reference station; s3, constructing a joint positioning equation for each base station combination, and carrying out initial position calculation on each combination by adopting a weighted least square method to obtain an intermediate position estimated value and a corresponding residual error; s4, identifying the NLOS base station by using sliding window-based multi-feature residual dynamic threshold judgment and effective combination-based NLOS weight penalty verification respectively; and S5, calculating the base station combination according to the residual error and the geometric precision factor to obtain high-precision position estimation. According to the method, unreliable NLOS base station signals can be intelligently identified in a complex electromagnetic environment, the weights of the unreliable NLOS base station signals are reduced, and finally more accurate target position estimation is fused.

The invention relates to the technical field of high-precision positioning, in particular to a mine tight combination positioning method based on environment self-adaption, and aims to solve the problem of efficient positioning of personnel and equipment in a complex and limited space under a mine. The method comprises the step of acquiring a time difference of arrival measurement value through the ultra-wideband positioning tag and the positioning base station. Chi-square testing is carried out based on the innovation statistics of the extended Kalman filtering, and whether the environment is a sight distance environment is judged according to comparison between the innovation statistics and a threshold value. If the innovation statistic is lower than a threshold value, determining that the environment is a sight distance environment, and if the innovation statistic is higher than or equal to the threshold value, determining that the environment is a non-sight-distance environment. For a sight distance environment, high-precision coordinate estimation is obtained by adopting a time difference of arrival positioning algorithm, and a positioning result is optimized through extended Kalman filtering fusion. And activating the inertial measurement unit, constructing an ultra wide band / inertial measurement unit tight combination extended Kalman filtering model for a non-line-of-sight environment, and outputting a positioning result.

The invention provides a zero offset detection device and method for an optical aiming device. The device comprises a laser cross emitter, an attenuation piece, a test target plate, a camera and a PC terminal. The attenuation sheet is arranged at the light path output end of the laser cross-shaped emitter and is located between the laser cross-shaped emitter and the test target plate; the test target plate is arranged in the laser emitting direction of the attenuation sheet, and a preset distance is formed between the test target plate and the laser cross emitter; the optical axis of the camera is aligned with the test target plate, and the camera is used for collecting a laser image on the test target plate and sending the laser image to the PC terminal; and the PC terminal controls the camera to move to coincide with the cross center of the target plate in a cross division manner, records the movement amount and calculates the zero offset. According to the invention, the problems of complex zero offset detection process, low safety and insufficient precision can be solved.

The disclosure is related to an enclosed reflex sight for one or more firearms. The enclosed reflex sight may be provided as part of an assembly including a mounting interface. The enclosed reflex sight includes a rearward bottom portion that houses an adjustment assembly, wherein the rearward bottom portion includes a lowermost surface of the enclosed reflex sight. The enclosed reflex sight includes an upper bottom surface forward of the rearward bottom portion of the enclosed reflex sight, the upper bottom surface comprising an abutment surface for the mounting interface. When the assembly is secured to an upper mounting surface of a firearm then the lowermost surface of the rearward bottom portion of the enclosed reflex sight is closer to the upper mounting surface of the firearm than the upper bottom surface of the enclosed reflex sight.

The disclosure is related to an enclosed reflex sight for one or more firearms. The enclosed reflex sight may be provided as part of an assembly including a mounting interface. The enclosed reflex sight includes a rearward bottom portion that houses an adjustment assembly, wherein the rearward bottom portion includes a lowermost surface of the enclosed reflex sight. The enclosed reflex sight includes an upper bottom surface forward of the rearward bottom portion of the enclosed reflex sight, the upper bottom surface comprising an abutment surface for the mounting interface. When the assembly is secured to an upper mounting surface of a firearm then the lowermost surface of the rearward bottom portion of the enclosed reflex sight is closer to the upper mounting surface of the firearm than the upper bottom surface of the enclosed reflex sight.

The invention discloses a robot dynamic path planning method and system fused with lightweight LLM. The robot dynamic path planning method comprises the following steps of dynamically mapping a grid map, constructing a semantic analysis model, performing global path planning by adopting an improved A * algorithm, and performing local path optimization by adopting an improved DWA algorithm. Specifically, according to the method, the high-frequency capture and real-time updating of the dynamic obstacle are realized by introducing the fusion of the event flow of the event camera and the depth information of the laser radar; dynamic matching of semantic instructions and planning parameters is achieved by introducing lightweight LLM, meanwhile, sight distance penetration rate optimization path connectivity is fused in global planning, local obstacle avoidance adopts a semantic adaptive weight adjustment mechanism, the high-precision perception advantage of multi-sensor fusion is guaranteed, task adaptability and scene pertinence are improved, and the method is suitable for large-scale popularization and application. And the complex requirements of logistics scenes are met.

A sight mounting system (300; 400) for mounting an optical sight (200; 500) to a firearm, comprising: a sight mounting interface (110; 410), and an oblong dovetail member (305), wherein the oblong dovetail member (305) is arranged to be forced in close contact with a leaning back wall (125) of the sight mounting interface (110) and a leaning rear face (240; 540) of the optical sight (200; 500), wherein the leaning front face (245; 545) of the reflex sight is forced against the leaning front wall (135) of the sight mounting interface (110). An optical sight (200) for mounting to a sight mounting interface (110; 410), and an adapter plate for mounting a sight to a sight mounting interface

The disclosure is related to an enclosed reflex sight for one or more firearms. The enclosed reflex sight may be provided as part of an assembly including a mounting interface. The enclosed reflex sight includes a rearward bottom portion that houses an adjustment assembly, wherein the rearward bottom portion includes a lowermost surface of the enclosed reflex sight. The enclosed reflex sight includes an upper bottom surface forward of the rearward bottom portion of the enclosed reflex sight, the upper bottom surface comprising an abutment surface for the mounting interface. When the assembly is secured to an upper mounting surface of a firearm then the lowermost surface of the rearward bottom portion of the enclosed reflex sight is closer to the upper mounting surface of the firearm than the upper bottom surface of the enclosed reflex sight.

The invention discloses an eye movement tracking method and system based on multi-modal fusion, and particularly relates to the technical field of eye movement tracking, and the method comprises the steps: collecting a face image, an eye image and a head movement parameter of a user through an RGB camera, an infrared camera and an IMU which are synchronously arranged; the signals are processed in parallel, sight line direction vectors based on the face and the eyes and reliability measurement of the sight line direction vectors are extracted respectively, and the head space posture is calculated; dynamically selecting high-confidence cooperation, master-slave compensation or conflict arbitration strategies according to reliability measurement, and fusing to generate an initial sight direction; and mapping the direction to a display plane to obtain an initial fixation coordinate, performing optimization calibration in combination with visual saliency analysis of screen content, and outputting a final fixation point coordinate. The system comprises a signal acquisition and processing module, a parallel computing module, a multi-strategy fusion decision-making module and an output optimization module. According to the invention, through multi-modal information fusion and dynamic strategy selection, the precision and robustness of eye movement tracking are significantly improved.

The invention discloses a single-satellite target sight atmospheric refraction correction method and system based on multi-spectral range finding, and relates to the field of atmospheric refraction processing, and the method comprises the steps: determining a target radiation intensity ratio based on two radiation intensities on different wavebands at the same moment; obtaining observation sight lines of the satellite on the measured target on different wave bands at the same moment, and carrying out light trace tracking to obtain a light ray tracking trajectory; determining a target grid through which each ray tracing trajectory passes from the atmosphere gridding model, determining an extinction coefficient of each target grid, and constructing a target function of a radiation intensity ratio with respect to the height of the target from the ground in combination with a radiation intensity calculation formula; determining a target height from the measured target to the ground based on a target function and a target radiation intensity ratio, determining the position of the measured target according to a track point matched with the target height in each light ray tracing track, and determining a sight line vector after atmospheric refraction correction by combining the position of a satellite, therefore, high-precision atmospheric refraction correction under a single-star observation condition is realized.

The invention relates to the technical field of radar monitoring, and discloses a dam InSAR three-dimensional deformation monitoring method based on an Eff-Transform model, and the method comprises the steps: enabling ground measurement three-dimensional deformation points to be in one-to-one correspondence with points on a sight line direction deformation graph through target matching, and obtaining a sight line direction one-dimensional deformation-ground three-dimensional deformation data pair; environmental factors influencing the three-dimensional deformation of the dam are synchronously added; and finally, training the model by using a pre-constructed attention mechanism model and sight direction one-dimensional deformation-ground three-dimensional deformation data, and after the model training is converged, directly realizing an end-to-end ground three-dimensional deformation data calculation modeling process through synthetic aperture radar data of a lifting rail. According to the method, various complex change relations between input and output are fully considered, and the current deformation quantity of the dam is influenced by historical deformation quantity and various environmental factors, so that the three-dimensional deformation monitoring of the dam is more perfect, and a better monitoring effect is obtained.

The invention provides a signal processing method and system for a long-distance follow-up laser seeker, and belongs to the technical field of signal processing. Target surface center coordinates, a light spot image sequence and a synchronous echo pulse waveform sequence of the seeker are obtained; the speckle energy entropy and the centroid drift distance are obtained by calculating the information entropy and the centroid displacement of the target light spot image, and the pulse width parameter is extracted from the echo waveform. And constructing the three parameters into a laser feature vector, and inputting the laser feature vector into a pre-trained reflecting surface classification model so as to identify the surface material type of a laser irradiation point in real time. And determining a group of optimal follow-up control gain sets from the material gain mapping relation according to the surface material type, and dynamically reconstructing a follow-up control loop by using the optimal follow-up control gain sets. And the sight angle error of the light spot mass center and the target center is calculated, and the adjusted control loop is used for calculating the error to generate an accurate driving instruction signal, so that the tracking stability and the tracking precision of the target are improved.

Systems, devices, and methods are disclosed to correct aimpoint of a system of a weapon and affixed digital weapon sight. The method employs the components of a digital weapon sight configured together for a process of sensing of a ballistic event, storing of digital imagery data before and after a shot or series of shots, and then the performing of an image registration algorithm, via a cross-correlation type function. The image registration determines the misalignment between the images as a Cartesian shift, and aimpoint of subsequent shooting is corrected through application of adjusted reticle symbology or adjusted image sensor windowing. Preprocessing methods for enhancing image registration algorithm accuracy are presented.

A weapon system has an optical sight mounted to a weapon and a frame with a sight window that is configured to superimpose a reticle that is visible through the sight window in a first focal plane. An optoelectronic device is mounted to the weapon and includes an imager with a sensor array and a display device. An image processor is configured to receive image data captured by the sensor array and process the image data to generate a subset image that is received from a select region of the sensor array. The select region of the sensor array defines a second focal plane. A controller is configured to receive an input from an operator, and in response to the input, to select the select region of the sensor array for aligning the second focal plane with the first focal plane.

The utility model belongs to the technical field of optical gauges, and particularly discloses a device for calibrating an optical axis of a binocular low-light night vision device. A double-tube front mirror of the device is fixed to the upper portion of an adjusting frame, a field instrument is fixed to the upper portion of a supporting frame, the supporting frame, a supporting seat and the adjusting frame are sequentially arranged on a workbench, a cross reticle I is arranged in the field instrument, a base I of the supporting seat is placed on the surface of the workbench, a top plate is fixed to the top end of a connecting handle through the connecting handle, and a connecting plate is fixed to the upper surface of the top plate. The top of the connecting plate is provided with a dovetail groove which can be in sliding connection with a dovetail joint at the bottom of the binocular low-light night vision device, and the extending direction of the dovetail groove is parallel to the optical axis of the field instrument. According to the utility model, the binocular low-light night vision device can be directly clamped in the dovetail groove in a sliding manner through the dovetail joint for positioning, the calibration of the parallelism of the optical axis is realized through the cooperation of the field instrument and the double-tube front mirror, and the calibration device has the characteristics of simple structure, convenience in calibration, high result precision and reliability in positioning.

The invention discloses a non-line-of-sight moving target three-dimensional reconstruction method based on an MIMO millimeter wave radar, and is applied to the technical field of radar target detection in a complex urban environment. Aiming at the problem of difficulty in realizing three-dimensional reconstruction of a non-line-of-sight moving target in the existing radar target detection technology, the method comprises the following steps: firstly, establishing a non-line-of-sight multipath propagation model, and exporting a multipath signal model of an MIMO millimeter wave radar; the invention further provides a multipath signal departure angle (DoD) / arrival angle (DoA) unambiguous estimation algorithm, and solves the problem that a main lobe and a grating lobe are difficult to distinguish in the DoD / DoA estimation process of an existing commercial MIMO radar. And finally, proposing a path-oriented non-line-of-sight target three-dimensional positioning algorithm, respectively positioning the non-line-of-sight target by using different paths, and fusing different path positioning results to form a three-dimensional point cloud. According to the method, three-dimensional reconstruction of a plurality of non-line-of-sight moving targets can be realized, and the correlation problem between paths does not need to be considered.

In a single play mode, a sight is moved by a first operation method using a sight movement instruction input, an operation target object is caused to execute an action by a second operation method using an action instruction input, and the operation target object is moved by a third operation method. In a multiplayer mode, the sight is moved by the first operation method performed by a first player, the operation target object is caused to execute the action by the second operation method performed by the first player, and the operation target object is moved by a fourth operation method based on a movement input by a second player.

Apparatus and methods provided for a gunsight and sighting system for use on firearms. The gunsight and sighting system comprises a mount portion coupled with a hood portion. A projection window with a collimated image overlay is secured to the mount portion by the hood portion. A front sight dot is disposed forward of the projection window, while two rear sight dots are disposed at a rear of the mount portion. The sight dots may be illuminated by any various desirable colors to enhance visibility in various lighting conditions. Light sensors are disposed at the front of the mount portion to detect ambient light and / or light in a target area and accordingly adjust illumination of the sight dots. The light sensors may be disposed in asymmetric locations of the mounting portion to overcome interference due to light arriving at angles other than in front of the gunsight and sighting system.

An assembly comprising a firearm slide and an adaptor plate configured to mate with the firearm slide. The adapter plate includes a first seat in a top surface of the adaptor plate and a second seat in the top surface of the adaptor plate. The assembly also includes a first iron sight configured to mate with the first seat and a second iron sight configured to mate with the second seat.

The invention discloses a satellite-ground bistatic synthetic aperture radar (SAR) dual-angle two-dimensional deformation inversion method, which constructs a dual-angle system configuration based on a satellite-ground bistatic SAR, proposes a two-dimensional deformation inversion method under the satellite-ground bistatic SAR dual-angle configuration, and obtains two-dimensional deformation of a kilometer-level region. The limitation that a traditional satellite-ground SAR can only obtain one-dimensional deformation in the equivalent sight line direction is solved, the method is suitable for refined monitoring of complex deformation fields in geological disasters such as landslides and earthquakes, and multi-dimensional data support is provided for disaster mechanism analysis. Observation data of ground double receiving stations are fused, shielding and low correlation areas are masked, the influence of noise phases and orbit error phases is effectively restrained, the problem that the space-variant property of the equivalent sight included angle of the satellite-ground bistatic SAR is large is solved, and the two-dimensional deformation precision reaches the centimeter level.

The embodiment of the invention discloses intelligent glasses, an image combination distance adjustment method and a storage medium, and the method comprises the steps: obtaining a current sight focus point of a user, determining a target image combination distance according to the current sight focus point, determining an adjustment parameter according to the target image combination distance and information related to the current image combination distance, and adjusting the image combination distance according to the adjustment parameter. The image combination distance of the left light machine and the right light machine is adjusted at least by controlling the first display area of the left micro-display to move and the second display area of the right micro-display to move, so that the display position of the target image in the visual field of the user corresponds to the current sight focus point of the user. Therefore, the dynamic adjustment of the image combination distance is realized, and the user experience is ensured.

The invention discloses an airborne laser radar collimation axis error correction method based on an oval scanning track, belongs to the technical field of error correction, is used for collimation axis error correction, and comprises the following steps: correcting points of the oval scanning track and correcting a normal vector of a reflector; performing forward fixed-point scanning on an object to be measured by using the laser radar to obtain a forward oval scanning track, performing backward fixed-point scanning to obtain a backward oval scanning track, and obtaining points of the corrected oval scanning track; and calculating a scaling factor, and correcting the normal vector of the reflector to complete collimation axis error correction. The method does not need external auxiliary equipment, does not depend on ground control points or regular ground feature information, is suitable for complex application scenes without deployment and control, without overlapping areas and the like, and improves the adaptability, correction precision and engineering practicability of the system; the practicability in a field complex environment is remarkably improved, and the method is suitable for single-route flight in an uncontrolled area; the method has a trajectory scale distortion correction capability, and enhances the spatial consistency of sounding point clouds.

The techniques described herein relate to methods and apparatuses for adjustment of an interchangeable sight assembly. Elevation and windage of a sight insert may be adjusted. Further, the elevation adjustment mechanism may be used to uncouple a sight insert from the sight assembly and couple another sight insert.

The invention relates to the technical field of binocular vision detection, in particular to steel structure crack detection equipment based on a binocular vision system, which comprises two eyeball cameras mounted on an unmanned aerial vehicle and a blinking mechanism arranged between the two eyeball cameras, the blinking mechanism comprises an eye frame, a disc placing device, a wheel controller, a liquid tank mechanism, a transverse bracket, a focal length rotary knob disc, a synchronizing shaft and a zoom accelerator, and when the unmanned aerial vehicle carries binocular camera equipment to carry out steel bridge crack detection, spherical lenses of the two eyeball cameras automatically complete blinking cleaning once every a period of time; and the blinking is realized by sequentially and alternately swinging the two eye frames, so that the situation that the sight is briefly shielded due to the simultaneous blinking is avoided, and the bionic blinking cleaning and the detection shooting in the invention do not influence each other.