2219 results about "Sight" patented technology

A pistol has a frame, an elongated slide operable to reciprocate on the frame and having a top surface, a slide recess defined in the top surface and having a forward edge and a rear edge, the rear edge including a forward facing stop surface, a spacer element connected to the elongated slide at the forward edge and having a spacer rear surface, the spacer element having a predetermined linear dimension configured to define a resulting recess length between the spacer rear surface and the rear edge of the slide recess, and the elongated slide having an optic attachment facility at the slide recess configured to receive an optical element having a length closely received between the spacer element and the rear edge of the slide recess in abutment with the rear edge of the slide recess. The spacer element may be a sight.

Sight systems comprise a sight receiver and a base attachable to and detachable from a sight receiver. A base carries a sighting component, such as an iron sight or optic sight. A sighting component may be attachably and detachably mounted to a base, or a sighting component may be made integrally with a base. A base may carry plural sighting components. Sight systems may include plural interchangeable sight receivers, bases, and / or sighting components. In some embodiments, a sight system may comprise a base deployed with an elastomeric or otherwise resilient mounting pad. In some embodiments, an elastomeric or otherwise resilient mounting pad may be proud of a front or rear face of the base, or a side face of the base, or both. In some embodiments, the pad may be proud of a bottom surface of the base.

A constant intensity light regulating firearm sight device includes a main body that is mountable onto the firearm and a lens that is positioned along the main body in a direction that is line of sight parallel to a firing axis of the firearm. The device includes a light source, a light sensor and a controller that are positioned along the main body. The light source emits a visible aim point onto the lens, and the light sensor detects and reports ambient light conditions to the controller. The controller includes a memory and processor for storing information and for controlling the operation of the device based on inputs from a user interface and the light sensor. The brightness level of the aim point is adjustable to a user-defined custom brightness setting, and the controller increases or decreases the custom brightness level based on data from the light sensor.

A line-of-sight direction tracking method includes: providing corneal reflection for an eye of a user by using a plurality of light sources, and capturing images including a face of the user by using a plurality of cameras; determining coordinates of a light source reflection point and coordinates of a pupil center in a world coordinate system by means of a human eye feature set acquired from the images including the face, based on hardware calibration parameters; determining a line-of-sight optical axis according to the coordinates of the light source reflection point and the coordinates of the pupil center, and reconstructing, based on the line-of-sight optical axis, a line-of-sight visual axis by means of a compensation angle; and determining a point of sight on a target object according to the line-of-sight visual axis and a position of the target object in the world coordinate system.

The invention discloses a holographic sight based on a volume Bragg grating, and belongs to the field of holographic optics. The holographic sight comprises a sight housing, a semiconductor laser, a wave-locking element, a beam expander, an off-axis parabolic reflector and a holographic grating. The wave-locking element is a reflective volume Bragg grating, and the holographic grating is a transmissive volume Bragg grating. Both have excellent selectivity for the wavelength and incident angle of light. At the same time, both are made of photothermorefractive glass, which is less affected by the external temperature and can effectively reduce the deviation of the output wavelength, thereby reducing the deviation of the holographic grating mark image and increasing the accuracy and stability of the holographic sight. The photothermorefractive glass has a high refractive index modulation degree, which achieves a higher holographic diffraction efficiency, making the displayed holographic image brighter and more recognizable. In addition, the components of the beam expander and the off-axis parabolic reflector are used to shorten the optical path and reduce the overall structural size of the sight.

A quick-attachment / quick-release firearm accessory mounting assembly releasably and rotatably attached to a firearm rail, chassis, or handgun slide to receive any of a number of different accessories, such as, a telescopic sight, reflector sight, laser sight, night vision sight, thermal scope, range finder, and other secondary instruments. The mounting assembly is in the form of an adaptor plate having attachment structures for receiving the accessory on a top surface, and securing to the firearm structure on a bottom surface. The firearm is modified to receive the adaptor plate, the firearm frame having a recess portion with a center protrusion in rotatable communication with a center aperture in the adaptor plate, and having grooves or slots formed at each end of the recess portion to receive flanges at each end of the adaptor plate upon rotation.

Disclosed are implementations of a lens cap assembly, each configured to shroud the lens of either a flashlight, an optical sight, or a night vision device. Each lens cap assembly comprises a sleeve, a removable lens or an anti-reflection element positioned within the sleeve, and a cap. The cap is attached to the sleeve by an elastic cord.

The invention discloses a live shell shooting training effect evaluation method, which relates to the field of military training, and comprises the following steps: constructing a live shell shooting training evaluation system which comprises a target drone, a shooting device and a data processing device; acquiring a shooting action image of the trainer through a camera device; performing feature extraction on the shooting action image by using a pre-trained convolutional neural network to obtain a feature vector sequence describing the gun holding posture of the trainer; according to the feature vector sequence, a shooting posture stability evaluation model is established through a bidirectional long-short-term memory neural network BiLSTM-Attention based on an attention mechanism, and shooting posture stability data is obtained; analyzing the acquired shooting action image by utilizing a recurrent neural network model based on an attention mechanism to obtain a moving track and residence time of the sight line of the trainer between the front sight and the target, and generating aiming track and aiming time data; and generating a shooting training effect evaluation report. Aiming at single evaluation dimension in the prior art, comprehensive and objective evaluation is generated.

Provided is an optical sight with a non-optical rear sight element. The optical sight has a housing, an optical screen element, a light source that projects a sighting reticle image onto a surface of the screen element. A non-optical rear sight element is positioned on the housing forward of the screen element. The non-optical rear sight element may be selectively removable.

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.

The disclosure relates to a micro gunsight, a small laser, a fine-tuning spring, a laser sight device inner core, a reset pin and a laser sight device. which includes a mounting slot that is matched with the gun card track. The mounting slot is composed of a fixed rail and a movable rail. The mounting slot is provided with a gunsight body, and inside the gunsight body is provided with a laser fine-tuning seat. A dual-light laser is installed inside the laser fine-tuning seat, and a fine-tuning mechanism is installed in the laser fine-tuning seat. There are multiple adapters at the bottom of the gunsight body, which are suitable for different Picatinny rails, making the installation position closer to the trigger guard, convenient for users to operate, and avoiding the problem of easy loosening of the front and rear positions of the sight device.

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.

An adjustable bow sight includes a base, a sight mount, a carrier, and an adjustment mechanism. The base is configured to be mounted to the riser of a bow. The sight mount is configured to facilitate the mounting of a sight to the carrier. The carrier is configured to move with respect to the base but remain fixed with respect to the sight. The adjustment mechanism facilitates the adjustment of the position of the carrier with respect to the base. In a particular embodiment, the carrier moves along an arcuate path when the adjustable bow sight is adjusted. In a more particular embodiment, the sight is a scope.

Some embodiments include an optic sight, an adapter for mounting the optic sight on a firearm assembly, or a part of the firearm assembly on which the optic sight is mountable, the article comprising: a pocket in the case that the article comprises an optic sight, or a slot in the case that the article comprises the adapter or said part; the pocket capable of receiving a first portion of a retaining assembly in a partially assembled state, and allowing rotation of the received first portion of the retaining assembly; the slot capable of receiving a second different portion of the retaining assembly in a partially assembled state, and preventing rotation of the received second portion of the retaining assembly; wherein, while the received first portion of the retaining assembly is within the pocket or the received second portion of the retaining assembly is within the slot, the rotatable drive interface is usable for securing the optic sight on the firearm assembly or the adapter. Other embodiments may be disclosed and / or claimed.

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 firearm surveillance sight system is disclosed comprising a sight having a plurality of adjustably mounted cameras configured to provide a view of the environment surrounding the user via one or more smart devices. The sight is adjustably mounted to a mounting rail of a firearm, each of the one or more smart devices adjustably mounted to the mounting rail of the firearm or a helmet mounting rail positioned on a helmet of the user.

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.

The invention discloses a crane grab bucket control method in a poor sight environment. S1, starting a lifting mechanism, and enabling the grab bucket to descend at the same speed to realize continuous descending of a non-contact material surface; s2, in the descending process of the grab bucket, the descending of the touched material surface is automatically stopped; s3, when the grab bucket makes contact with the material surface, the lifting mechanism is automatically stopped, and the grab bucket is controlled to automatically sink; and S4, after bucket closing is completed, a lifting mechanism is started, the grab bucket ascends at the same speed, and discharging is completed after the grab bucket ascends in place. According to the invention, the grab bucket of the crane can be controlled in an environment with poor sight, only the characteristics of the permanent magnet synchronous motor are needed, and the existing grab bucket crane does not need to be transformed; the method can be realized without additionally arranging any detection device (without additionally arranging devices such as an absolute value encoder, a torque sensor, a high-precision electronic scale, a high-echo laser scanner, a fog-penetrating camera and the like which need to be added in the traditional scheme). By judging the output current of the lifting and opening-closing frequency converter, the automatic descending function of a non-touched material surface is achieved, the automatic stopping function of a touched material surface is achieved, the grabbing amount is controlled, automatic deceleration stopping during descending is achieved, automatic grabbing sinking of the grab bucket is controlled, and automatic load balancing of the grab bucket is controlled.

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.

An apparatus and method for modifying a slide of a firearm to accept an optical sight comprises a modified slide that is adapted to include a flat recessed rear section configured to receive an adapter plate for mounting an optical sight. Various embodiments of the modified slide include modified internal components to replace stock components what will no longer fit within the operational profile of the modified slide. Replacement of the slide and associated internal components will allow a user to add an optical sight to an existing firearm with an exterior surface that is not suitable for mounting an optical sight device.

The disclosure is directed to a locking adjustment assembly for an optical sight. The locking adjustment assembly is configured to be set at a zero locked position, adjusted from the zero locked position to a desired unlocked position and returned to the zero locked position. The locking adjustment assembly includes a biased locking member and a biased unlocking member that are configured to be adjusted about a rotational axis of the locking adjustment assembly and adjusted along the rotational axis to establish a desired zero locked position of the locking adjustment assembly.

The invention relates to a sight angle rate extraction method based on depth target tracking, and relates to the field of navigation control and computer vision. Comprising the steps of deploying a variable-focus optical camera on an unmanned aerial vehicle, and setting a normal of the center of a mirror surface of the camera to be inclined at a certain angle with a horizontal plane for acquiring complete information of a target; calibrating the target in the camera based on an optical parameter calibration method, and obtaining a field angle of the target relative to the center of the camera; deploying a target tracking algorithm on the unmanned aerial vehicle, and identifying a target position based on the target tracking algorithm; obtaining a horizontal deflection angle and a pitching deflection angle of the target relative to the center of the camera by combining a target position identified by a target tracking algorithm based on the field angle; and estimating the line-of-sight angular rate through Kalman filtering based on the obtained horizontal deflection angle, the obtained pitching deflection angle and the flight parameters of the unmanned aerial vehicle. Through combination of parameter calibration of the optical camera and a target tracking algorithm based on deep learning, the horizontal deflection angle and the pitching deflection angle of the target can be accurately obtained.

The invention discloses a variable gain inversion maneuvering target interception guidance method considering attack angle constraint, and belongs to the technical field of aircraft guidance control. The implementation method comprises the following steps: considering necessary conditions for interception success and end attack angle constraints, based on trajectory shaping, representing a sight angle reference profile by constructing a polynomial function taking a flied distance as an independent variable, and realizing reduction of initial and end constraints; the profile only utilizes missile-target relative information and does not depend on motion information of the target, so that the profile is suitable for intercepting targets in various motion forms. In order to accurately track a line-of-sight reference profile, adverse effects of aircraft control input saturation constraint and target maneuvering interference on a guidance system are considered, an input saturation compensator and a finite time interference estimator are introduced, and a variable gain interception guidance law is designed based on an inversion control architecture. And the aircraft can accurately track the profile and can intercept the maneuvering target at an expected angle at the same time. The method has the advantages of low required overload, high interception precision and good robustness.

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.

A sight system based on a combination of infrared imaging, low-illumination imaging, and an LED sight light dot, comprising an LED graphics chip (20), a lens (3), a beam splitter (30), a display screen (31), a thermal imaging core assembly (13), a low-light night vision camera module (48), and a main control board (51). The thermal imaging core assembly (13) is electrically connected to the main control board (51), the low-light night vision camera module (48) is electrically connected to the main control board (51), the thermal imaging core assembly (13) and the low-light night vision camera module (48) are both electrically connected to the display screen (31), the main control board (51) is electrically connected to the LED graphics chip (20) and the display screen (31), separately, and light emitted from the LED graphics chip (20) and the display screen (31) is incident on the lens (3) after passing through the beam splitter (30).

The embodiment of the invention relates to the technical field of vehicle control, and discloses a control method, device and equipment for a vehicle-mounted display screen, and the method comprises the steps: firstly, determining a fixation point of a driver according to eye activity data of the driver, the eye activity data comprising a target eyeball position and a sight line direction of the driver; then, according to the fixation point, the frequency of checking the vehicle-mounted display screen by the driver is determined; then, if the frequency is greater than a preset frequency, determining a target angle according to the target eyeball position; and finally, adjusting the vehicle-mounted display screen to the target angle. By applying the technical scheme of the invention, the influence of screen reflection on the sight of a driver can be reduced, the driver is helped to keep the sight concentrated, the visual fatigue is reduced, and the comfort and safety during long-time driving are improved.

A quick-attachment / quick-release firearm accessory mounting assembly releasably and rotatably attached to a firearm rail, chassis, or handgun slide to receive any of a number of different accessories, such as, a telescopic sight, reflector sight, laser sight, night vision sight, thermal scope, range finder, and other secondary instruments. The mounting assembly is in the form of an adaptor plate having attachment structures for receiving the accessory on a top surface, and securing to the firearm structure on a bottom surface. The firearm is modified to receive the adaptor plate, the firearm frame having a recess portion with a center protrusion in rotatable communication with a center aperture in the adaptor plate, and having grooves or slots formed at each end of the recess portion to receive flanges at each end of the adaptor plate upon rotation.