65 results about "Sensor plane" patented technology

A digital adaptive optics encoder module includes an input mounting flange, a collimating lens, a bandpass filter, digital adaptive optic elements, refocusing lens, an output mounting flange, and a housing. The input mounting flange is capable of attaching to a telescope. The collimating lens is capable of expanding light from a target to fill a plurality of primary apertures. The bandpass filter has a bandwidth ranging from about 40 nm to about 100 nm. The digital adaptive optic elements include the plurality of primary apertures, an optical spreader, a focusing optic, and a detector. The refocusing lens is capable of refocusing an output from the digital adaptive optic elements onto a sensor plane. The output mounting flange is capable of attaching to an output connection. The housing encloses all of the interior components of the digital adaptive optics encoder module.

The invention provides a non-invasive high-precision blood glucose sensor and a preparation method thereof. The blood glucose sensor comprises two symmetrical sensing areas prepared on a flexible substrate layer, each sensing area comprises a glucose sensor working electrode, a glucose sensor auxiliary electrode / reference electrode, a sodium ion sensor working electrode, a pH sensor working electrode and a sodium ion / pH sensor common reference electrode; the electrodes are distributed in an axial symmetry mode along the central axis of the sensor plane and are prepared through silk-screen printing. Due to the symmetrical structural design of the blood glucose sensor, the electrode polarity of the extraction electrode can be exchanged during two adjacent times of extraction so as to reduce electrode consumption and skin stimulation, the change of the extraction amount of intercellular fluid can be corrected by the integrated sodium ion and pH sensor, and therefore high-precision blood glucose monitoring is achieved.

The invention belongs to the technical field of high-precision positioning of large objects, and particularly relates to an error correction method and system suitable for a binocular vision system of a bridge erecting machine, and the method comprises the steps: installing the binocular vision system and at least three laser sensors at selected positions on the bridge erecting machine in a coplanar manner, and defining an installation reference surface as a sensor plane; a mark plane is arranged on the erected bridge to serve as a measuring basis; respectively measuring depth information from each laser sensor to the mark plane by using the laser sensors; based on the depth information, dynamically calculating a space angle deviation between a sensor plane and a mark plane in real time; generating a correction matrix for correcting coordinates according to the space angle deviation; and measuring the target object by using the binocular vision system to obtain an original coordinate, and calibrating the original coordinate by using the correction matrix. According to the method, systematic errors caused by non-parallel installation are fundamentally eliminated, and the accuracy of final positioning and the stability of results are remarkably improved.

The invention relates to the technical field of parking lot positioning, in particular to a vehicle positioning management system in a parking lot based on dynamic weight multi-sensor fusion. Comprising a multi-source sensor data acquisition unit; an environment entropy perception and weight pre-adjustment unit; a reinforcement learning weight optimization unit; and an edge end vehicle positioning management unit. According to the method, an image histogram entropy value and a UWB signal RSSI fluctuation variance are calculated in real time through a heterogeneous sensor array in combination with an environment entropy perception and weight pre-adjustment unit, meanwhile, a space correlation matrix is constructed through sensor plane coordinate mapping, and interference space correlation characteristics are extracted. Based on reinforcement learning, a causal correlation model of an environmental entropy change rate, interference characteristics and sensor failure time is established, a sensor failure window can be predicted in advance, the weight of each sensor accessing a fusion filter is dynamically adjusted, and the problems of environmental influence perception deficiency, sensor correlation analysis and failure pre-judgment are solved.

The technology relates to a flexible printed circuit board (PCB) that is incorporated into a steerable tip of an endoscope. The endoscope includes a working channel extending through the steerable tip; a foldable printed circuit board (PCB) extending at least partially around the working channel. The foldable PCB includes a planar sensor segment extending along a first plane, the sensor segment populated with at least one sensor; a planar camera segment extending along a second plane that is substantially orthogonal to the first plane and positioned distally from the sensor segment, the camera segment including an opening for the working channel and populated with a camera and at least one light source, wherein the planar camera segment is partially separated from the sensor segment by an aperture in the foldable PCB; and a bent arm extending between, and connecting, the sensor segment and the camera segment.

The invention relates to a Scheimpflug camera (10) comprising - a camera connection (16) for mounting a camera (12), - a camera (12) which is mounted in the camera connection (16), comprising a sensor (123) which lies on a sensor plane and camera electronics (126) which are connected to the sensor (123), wherein the central surface normal of the sensor (123) defines a first optical axis, - a lens connection (18) for rigidly mounting a lens which defines a second optical axis, said lens connection being pivotal relative to the camera connection (16) about a pivot axis that intersects the first optical axis on the sensor plane such that the first and second optical axis run coaxially to each other or intersect each other on the sensor plane according to the pivot position, and - an installation base (20) in which the lens connection (18) is rotatably mounted about the second optical axis. The invention is characterized in that the camera (12) has a cylindrical sensor support (121), - on the front end face (122) of which the sensor (123) is fixed in a central position and in an orientation that is normal relative to the cylinder axis of the sensor support (121) and - the rear end face (124) of which has an interface for the camera electronics (126) that are arranged in the interior of the sensor support (121). The camera connection (16) has a central circular through-opening in which the sensor support (121) is directly mounted in an axially fixed manner and in a rotatable manner about the cylinder axis of the sensor support.

A system for determining pose of a lidar sensor in an environment in order to calibrate the lidar sensor. The system includes at least two calibration boards, each having a first edge and a second edge. There is a controller coupled to the lidar sensor to cause the lidar sensor to direct a lidar scan at the calibration boards. The controller causes the lidar sensor to receive a reflection of the lidar scan from the calibration boards and determine locations of a first crossing point on the first edge and a second crossing point on the second edge of the calibration boards. The controller determines a reference plane defined by the first and second crossing points of each of the calibration boards, performs a plane transform of the reference frame to obtain a lidar sensor plane and determine from the lidar sensor plane a pose of the lidar sensor.

The invention discloses a method and device for measuring the intersection point position of a camera reference axis and a sensor plane, and relates to the technical field of semiconductor packaging. According to the method, the coordinate system is constructed on the sensor plane, the origin of the coordinate system and the first imaging coordinate point are determined, then the camera rotates around the camera reference axis to obtain a plurality of new imaging coordinate points, and the imaging coordinate point set is constructed; the coordinates of the intersection point of the camera reference axis and the camera sensor surface are determined according to the imaging coordinate point set, a reliable basis is provided for analyzing the deviation of the camera reference axis and the sensor center point, and camera calibration is facilitated; meanwhile, through multiple times of rotation measurement, the recognition precision is enhanced, and errors possibly existing in single measurement are effectively reduced.

A computing device, method and computer program product are provided to identify a feature. In a method, images are captured at different points in time and space and a reference plane is defined in a reference frame. The method includes applying image warping to map a plurality of reference points of a respective image in a sensor plane to corresponding reference points of the reference plane and mapping pixel coordinates for a plurality of pixels of the reference plane to the respective image based upon a positional relationship between the reference plane and a representation of the respective image established by having applied image warping to the respective image. The method further includes interpolating from pixels of the respective image to pixels at the pixel coordinates of the reference plane to generate an interpolated representation of the respective image that is then used to identify the feature within the scene.

The application belongs to the technical field of high-precision positioning of large objects, and particularly relates to an error correction method and system suitable for a binocular vision system of a bridge erecting machine, comprising: coplanarly installing a binocular vision system and at least three laser sensors at selected positions on the bridge erecting machine, and defining a sensor plane as an installation reference plane; setting a mark plane on a bridge that has been erected as a measurement reference; measuring depth information from each laser sensor to the mark plane by using the laser sensors; dynamically calculating a spatial angle deviation between the sensor plane and the mark plane in real time based on the depth information; generating a correction matrix for correcting coordinates according to the spatial angle deviation; and measuring a target object by using the binocular vision system to obtain original coordinates, and applying the correction matrix to calibrate the original coordinates. The application fundamentally eliminates systematic errors caused by non-parallel installation, and significantly improves the accuracy of final positioning and the stability of results.

The invention provides a camera mirror image calibration method and system. The method comprises the following steps: acquiring positions and angles of a mirror and a camera; adjusting the relative positions of the mirror and the camera until the mirror image character plane, the lens plane and the sensor plane intersect at one point; according to the method, the positions of the mirror and the camera are adjusted through the laser aligner, images output by the camera are monitored in real time until clear images are obtained, the reflection principle of the mirror is combined with the camera, the definition and consistency of the images are ensured, and image calibration and quality detection are achieved through inclination and position adjustment based on the Scheimpflug principle.

The invention belongs to the technical field of two-dimensional information source direction finding of a sensor array, and particularly relates to a two-dimensional information source direction finding method based on a fully-filled rectangular area array. A plurality of uniform linear array combinations of three fully-filled rectangular area arrays located in X-Y, Y-Z and X-Z sensor planes in a three-dimensional Cartesian rectangular coordinate system are utilized to construct and solve an MYW linear equation set and a rooting polynomial by utilizing uniform linear array data based on a degraded spatial ARMA model, and a corresponding signal source phase difference is estimated; giving out phase difference and uniform linear array conditions required by automatic pairing until all information sources are paired; and finally, calculating an information source azimuth angle and an elevation angle. According to the two-dimensional direction finding method provided by the invention, uniform linear arrays can be flexibly combined instead of depending on a small number of specific arrays, so that the data advantages of a fully-filled rectangular area array can be matched and fully exerted, and meanwhile, the two-dimensional direction finding method is suitable for a non-fully-filled rectangular area array.

The invention belongs to the technical field of bridge safety, and provides a dynamic monitoring method and device for global deflection and instability risk of a bridge structure. According to the method, p * q matrix type wireless composite tilt angle sensors are arranged on a target bridge structure, relative coordinates and tilt angle values of sensor planes are collected in real time at the frequency not lower than 50 Hz and transmitted to a monitoring device in a remote wireless mode, meanwhile, the normal displacement of a panel relative to the original point position is synchronously obtained through a GPS, multi-source data time synchronization processing is carried out, and the relative coordinates and tilt angle values of the sensor planes are obtained. And the data time consistency is ensured. A deflection curved surface fitting algorithm is utilized, an overdetermined equation is constructed, Moore-Penrose pseudo-inverse solution and displacement constraint correction are performed, an actual deformation curved surface of the bridge structure is fitted in combination with sensor data and normal displacement, then the maximum deflection and the maximum curvature are calculated, and real-time dynamic monitoring and danger early warning of overall deformation of the bridge structure are achieved according to dual control indexes. According to the invention, global high-precision dynamic monitoring and instability risk active prevention and control of bridge deflection deformation are realized.

The application provides a geometric solution method of key parameters of a forward-looking terrain of an exoskeleton, and through unified space-time coordinate, double-sensor plane fitting, swing-phase dynamic scanning solution, multi-step fusion verification, low-cost, high-precision and high-robustness terrain parameter solution is realized, and the exoskeleton embedded real-time control requirement is perfectly adapted.

According to an example embodiment, an optical sensor apparatus (110) for determining at least one characteristic of a surface of an object (180) positioned within a measurement range is provided, the sensor apparatus (100) comprising: an illumination assembly (120) comprising one or more light sources (121, 121-k) arranged to emit light towards the measurement range through a light-collecting optical assembly, wherein the emitted light covers a predefined range of wavelengths and wherein the one or more light sources are arranged to form respective one or more light emitting area patterns of predefined lateral shape; a first optical assembly (140) arranged to longitudinally disperse the light emitted from the illumination assembly (120) such that light across the predefined range of wavelengths in each of the one or more light emitting area patterns is focused at a respective range of focus distances that constitutes a corresponding sub-range of candidate distances within the measurement range; a beam splitter (130) arranged to transmit the light emitted from the illumination assembly (120) towards the first optical assembly (140) and to fold the light reflected from the surface of the object (180) received through the first optical assembly (140); a second optical assembly (150) arranged to receive the folded light across the predefined range of wavelengths, to laterally disperse the received light across the predefined range of wavelengths and to focus the light across the predefined range of wavelengths at a predefined distance; a light sensor assembly (160) having a sensor plane arranged at the predefined distance to receive the laterally dispersed light across the predefined range of wavelengths such that the light originating from the one or more light emitting area patterns is received at respective one or more corresponding sub-ranges of positions along an axis (y′) on the sensor plane; and a detector assembly (170) arranged to determine the at least one characteristic of said surface of said object (180) based on the laterally dispersed light received across said one or more sub-ranges of positions along said axis (y′) on the sensor plane.

The invention relates to an electro-optical radiation protection device (1), in particular a light protection device, comprising at least one electro-optical protective sheet (1), which covers at least the visual field of one eye and comprises at least one liquid crystal element (2); at least two radiation sensors (3, 4, 5), each of which generates a control signal depending on the intensity of the incident radiation; and control electronics (6), which is designed to receive the control signals and to activate the or each liquid crystal cell (2), and which controls the degree of transmission (T) of the protective sheet (1) as a function of the control signals from the radiation sensors. The radiation sensors (3, 4, 5) are in the form of photodiodes having the highest sensitivity in the infrared range; the sensor surfaces (7, 8, 9) define sensor planes (SE3, SE4, SE5); at least two of the sensor planes (SE3, SE4) intersect one another at an angle of less than 45°; and the intersection line of these sensor planes (SE3, SE4) is preferably in, or parallel to, the sagittal plane (S) of the protective sheet (1).

The utility model discloses a measuring head mechanism of a film thickness gauge, which comprises a sensor, a plane measuring head, a large arc measuring head, a mounting seat, a fixing block assembly and a sensor shell, and is characterized in that the plane measuring head is mounted at the bottom of the sensor, the sensor shell is fixed above an instrument measuring table through a fixing block, and the large arc measuring head is mounted above the mounting seat and fixed; the upper and lower measuring heads are concentrically arranged. During measurement, the plane measuring head is lifted along with the sensor, the thin film passes through the space between the plane measuring head and the large arc measuring head, the plane measuring head falls to be in contact with the thin film, one-time measurement reading is completed, and the steps are repeated during multi-point measurement. The device is simple in working principle and convenient to operate, and can furthest avoid interference of dust on measurement when the measuring head is in contact with a film, so that the stability of continuous multi-point measurement data is realized.

According to one example embodiment, there is provided an optical sensor device (110) for determining at least one characteristic of a surface of an object (180) positioned within a measurement range, the sensor device (100) comprising: an illumination assembly (120), the illumination assembly comprises one or more light sources (121, 121-k) arranged to emit light through the light collection optical assembly towards the measurement range, where the emitted light covers a predefined wavelength range, and where the one or more light sources are arranged to form a respective one or more light emitting area pattern of a predefined lateral shape; a first optical assembly (140) arranged to longitudinally disperse the light emitted from the illumination assembly (120) such that light across the predefined wavelength range in each of the one or more light emitting area patterns is focused at a respective focal length range, the focal length range forms a corresponding candidate distance sub-range in the measurement range; a beam splitter (130) arranged to transmit the light emitted from the illumination assembly (120) towards the first optical assembly (140) and to fold light received through the first optical assembly (140) reflected from the surface of the object (180); a second optical assembly (150) arranged to receive the folded light across the predefined wavelength range to laterally disperse the received light across the predefined wavelength range and focus the light at a predefined distance across the predefined wavelength range; a light sensor assembly (160) having a sensor plane arranged at the predefined distance to receive laterally dispersed light across the predefined wavelength range, such that the light originating from the one or more light-emitting area patterns is received at respective one or more corresponding position sub-ranges along an axis (y ') on the sensor plane; and a detector assembly (170) arranged to determine the at least one characteristic of the surface of the object (180) based on the laterally dispersed light received across the one or more position subranges along the axis (y ') on the sensor plane.

Various embodiments of the present disclosure relate to a zero-Gauss magnet for a differentially twist-insensitive magnetic velocity sensor. A magnetic sensor module includes an axially polarized reverse bias magnet having a body extending radially from an inner sidewall to an outer sidewall and a hole defining the inner sidewall. The magnet body generates a radially symmetric bias plane magnetic field about a central axis in a sensor plane. The magnetic field has a substantially zero magnetic flux density along an extension of the central axis and on a circumference of a zero field circle located in the sensor plane, wherein the circumference of the zero field circle vertically overlaps with the magnet body in a plan view. The magnetic sensor module includes a magnetic sensor, which includes at least three sensor elements, which are arranged at a position in the sensor plane where the magnetic field has a substantially zero magnetic flux density in a radially symmetric bias plane, including at least two sensor elements arranged on the circumference of the zero field circle.

The application relates to a telecentric lens comprising a lens body extending along an optical axis (X). Such a lens body supports: a front optical group, a rear optical group, an aperture, a sensor plane, and a liquid lens. The front optical group is configured to receive incident light rays (Ri) originating from an object. The rear optical group is configured to receive light rays (Rj) from the front optical group. An aperture is disposed between the front optical group and the rear optical group. The sensor plane is configured to collect outgoing light rays (Rz) projected by the rear optical group. The aperture is substantially disposed at a focal point of the front optical group. Further, a liquid lens is disposed between the front optical group and the rear optical group. The curvature of the liquid lens can be modified in such a way that the focal plane of the object is translated along the optical axis (X). The telecentric lens can overcome those limitations caused by the depth of field of the lens, thus enabling it to move to different focal planes.

The invention relates to a telecentric lens (100; 100a; 100b; 100c) comprising a lens body (20) extending along an optical axis (X). The lens body (20) is provided with a front optical group (2), a rear optical group (5), a stop (4), a sensor plane (6) and a liquid lens (3). The front optical group (2) is configured to receive incoming light rays (R i ) originating from an object (1). The rear optical group (5) is configured to receive light rays (R j ) from the front optical group (2). The stop (4) is arranged between the front optical group (2) and the rear optical group (5). The sensor plane (6) is configured to collect outgoing light rays (R z ) projected by the rear optical group (5). The stop (4) is substantially arranged at a focal point of the front optical group (2). Furthermore, the liquid lens (3) is arranged between the front optical group (2) and the rear optical group (5). The curvature of the liquid lens (3) can be adjusted to translate a focal plane of the object (1) along the optical axis (X).

Systems and methods of determining a hologram of an image for a system comprising a display device and viewing system are disclosed. Some embodiments implement a multi-stage procedure comprising (i) determining a first complex light field at an entrance pupil of the viewing system, (ii) determining a second complex light field at a sensor plane of a sensor of the viewing system, (iii) determining a third complex light field at the entrance pupil, and (iv) determining a fourth complex light field at the display plane. Some embodiments include extracting a hologram from a data set corresponding to the fourth complex light field.

The invention discloses a flexible pipe composite layer winding tension monitoring device which comprises a tension sensing unit matched with a fiber rope of a winding machine, the winding machine comprises a machine disc, a bobbin and a wire outlet disc, a wire coil is installed on the bobbin, and the wire outlet end of the fiber rope is wound on the rotation face of a flexible pipe; the tension sensing unit comprises a tension sensor and a sensor fixing structure, the sensor fixing structure comprises a sliding sleeve, a telescopic cantilever and a buckle, the sliding sleeve is arranged on the bobbin in a sleeving mode, the fixed end of the telescopic cantilever is fixedly connected with the sliding sleeve, and the buckle is arranged at the free end of the telescopic cantilever and fixed to a fixing screw of the tension sensor; the position of the tension sensor relative to the fiber rope is determined by adjusting the positions of the sliding sleeve and the buckle; a sensing signal is finally transmitted to an upper computer so as to read and display the measured tension of the fiber rope in real time. The external cantilever type fixing structure is adopted, plane sliding of the sensor can be effectively prevented, meanwhile, actual winding is not affected, and high applicability is achieved.

The invention relates to a microscope with a light source for emitting excitation light, an illumination beam path for directing the excitation light into a sample area, wherein the illumination beam path comprises a polarization manipulator for changing a polarization state of the excitation light, a phase plate for generating an illumination pattern, a cylindrical optic for generating an elongated distribution of the excitation light, a scanning unit for scanning the elongated distribution of the excitation light through the sample area, and an illumination objective for directing the excitation light into the sample area, a camera for capturing images of a sample, a detection beam path with a microscope objective for directing emission light onto the camera, and a control unit for controlling the scanning unit and / or the camera and for reading out measurement data from the camera.The microscope is characterized in that the camera is arranged in a non-scanned part of the detection beam path and that the control unit is configured to synchronize a location of a readout slit-shaped area in a sensor plane of the camera with a location of the elongated distribution of the excitation light in a plane of the sample. The invention also relates to a slide reader and a method for microscopy.

The present invention relates to an optical system (10) for acquiring images of a scene, comprising: - a first optical channel (12) for providing a first optical flow originating from the scene viewed from a first field of view, - a second optical channel (14) for providing a second optical flow originating from the scene viewed from a second field of view having a smaller dimension than the first field of view, - a polarising splitter (16) for recombining a portion of the first optical flow according to a first polarisation state with a portion of the second optical flow according to a second polarisation state in order to form a recombined optical flow, - a sensor (18) for capturing the recombined optical flow, and - an array of polarisers (20) positioned in the plane of the sensor (18).

A multi-channel infrared gas sensor including a beam splitter arrangement, which splits an infrared beam into four infrared partial beams, four bandpass filters and four infrared sensors, respectively one for each infrared partial beam at a first used signal wavelength. The directions of propagation of the four infrared partial beams differ from one another in pairwise fashion. A first and second infrared used signal sensor are arranged so that respective used signal sensor detection areas have a symmetric orientation with respect to a used signal sensor plane of symmetry situated between the detection areas. A first and second infrared reference signal sensor are arranged so that respective reference signal sensor detection areas have a symmetric orientation with respect to a reference signal sensor plane of symmetry situated between the reference signal sensor detection areas. No signal sensor detection area is orthogonal to its respective signal sensor plane of symmetry.

A device, the device being configured to determine multi-point refocusing information using a target (60, 95) to realize object plane (13)- and / or sensor plane (31)- calibration in a holographic microscope (1).

The technology relates to a flexible printed circuit board (PCB) that is incorporated into a steerable tip of an endoscope. The endoscope includes a working channel extending through the steerable tip; a foldable printed circuit board (PCB) extending at least partially around the working channel. The foldable PCB includes a planar sensor segment extending along a first plane, the sensor segment populated with at least one sensor; a planar camera segment extending along a second plane that is substantially orthogonal to the first plane and positioned distally from the sensor segment, the camera segment including an opening for the working channel and populated with a camera and at least one light source, wherein the planar camera segment is partially separated from the sensor segment by an aperture in the foldable PCB; and a bent arm extending between, and connecting, the sensor segment and the camera segment.

The utility model discloses an automatic combined measuring device for the boundary dimension and planeness of a flat plate part, which comprises a base, a vacuum adsorption platform, a displacement sensor, a planeness detection unit and a right-angle backer, and is characterized in that the vacuum adsorption platform is horizontally arranged on the base and can move in the X direction and the Y direction on the base; the right-angle backer is fixedly connected to the vacuum adsorption platform, the two displacement sensors are arranged on the X-direction movement path and the Y-direction movement path of the vacuum adsorption platform respectively, measuring heads of the two displacement sensors directly face the two side edges of the right-angle backer respectively, and the two flatness detection units are arranged on the machine base and can independently do Z-direction movement on the machine base. The device is simple in structure, compared with high-precision inspection equipment such as a three-coordinate and imager, the technical requirement and cost are lower, measurement and evaluation of the boundary dimension and the flatness can be completed at a time after a part is clamped, and the device is higher in practicability in the batch production verification link.

The technology relates to a flexible printed circuit board (PCB) that is incorporated into a steerable tip of an endoscope. The endoscope includes a working channel extending through the steerable tip; a foldable printed circuit board (PCB) extending at least partially around the working channel. The foldable PCB includes a planar sensor segment extending along a first plane, the sensor segment populated with at least one sensor; a planar camera segment extending along a second plane that is substantially orthogonal to the first plane and positioned distally from the sensor segment, the camera segment including an opening for the working channel and populated with a camera and at least one light source, wherein the planar camera segment is partially separated from the sensor segment by an aperture in the foldable PCB; and a bent arm extending between, and connecting, the sensor segment and the camera segment.