41results about How to "Improve depth accuracy" patented technology

The method comprises providing a lancing device comprising a penetrating member (68) driver having a position sensor (74) and a processor (60) that can determine the relative position and velocity of the penetrating member (18, 72) based on measuring relative position of the penetrating member with respect to time; providing a predetermined velocity control trajectory based on a model of the driver (68) and a model of tissue to be contacted. Furthermore, a feedforward control is able to maintain penetrating member velocity along the trajectory.

A locator capable of tracking buried, non-metallic utility lines (fiber optic, gas, water, waste, conduits) using ground penetrating radar (GPR) and an inertial position sensor is described. In some embodiments, a tracking filter is applied to a hyperbolic trajectory model based on the radar range data to determine a predicted track of the target utility line. After comparison of the predicted track to the measured inertial position, the centerline variance of the tracked line can be deduced. In some embodiments, an electromagnetic pipe and cable locator may also be included. Some embodiments of the invention can include accurate depth calibration and line depth tracking. Further, a display may provide results to a user in a simplified fashion.

A locator capable of tracking buried, non-metallic utility lines (fiber optic, gas, water, waste, conduits) using ground penetrating radar (GPR) and an inertial position sensor is described. In some embodiments, a tracking filter is applied to a hyperbolic trajectory model based on the radar range data to determine a predicted track of the target utility line. After comparison of the predicted track to the measured inertial position, the centerline variance of the tracked line can be deduced. In some embodiments, an electromagnetic pipe and cable locator may also be included. Some embodiments of the invention can include accurate depth calibration and line depth tracking. Further, a display may provide results to a user in a simplified fashion.

Example embodiments relate to a three-dimensional (3D) image processing apparatus and method that may determine a Region Of Interest (ROI) in an entire sensing region of the 3D image processing apparatus, and may obtain a depth image of the ROI. Also, example embodiments may be applied to a surveillance camera system, a motion detection system, a virtual reality simulation system, a distance recognition system for vehicles, a robotic system, a background separation system based on depth information, etc.

Disclosed is a method of calibrating a depth image based on a relationship between a depth sensor and a color camera, and an apparatus for calibrating a depth image may include a three-dimensional (3D) point determiner to determine a 3D point of a camera image and a 3D point of a depth image simultaneously captured with the camera image, a calibration information determiner to determine calibration information for calibrating an error of a depth image captured by the depth sensor and a geometric information between the depth sensor and a color camera, using the 3D point of the camera image and the 3D point of the depth image, and a depth image calibrator to calibrate the depth image based on the calibration information and the 3D point of the depth image.

A method of fabricating a composite ferrite sheet including the steps of: (a) forming a grooved green ferrite sheet having a non-intersecting grid pattern by pressing a groove forming die including a plurality of first protrusions and a plurality of second protrusions having a triangular cross sectional shape, each protrusion of at least one of the plurality of first protrusions and the plurality of second protrusions being discontinuous at each imaginary intersecting portion at which extension lines of the respective first and second protrusions intersect each other, (b) firing the grooved ferrite green sheet to obtain a sintered ferrite sheet, (c) bonding at least one supporting sheet to at least one of opposite major surfaces of the sintered ferrite sheet, and (d) rupturing the sintered ferrite sheet along the grooves into a multiplicity of separate and independent rectangular planar ferrite segments which are bonded to the supporting sheet.

Methods of and systems for determining depths of provenance of drill cuttings contained in a drilling fluid received from a wellbore, the drilling fluid containing drill cuttings of different sizes that arrive at surface at different recorded times, the drill cuttings originating from different formation layers at different depth along the wellbore. Such methods, for example, may include extracting samples of drill cuttings from the drilling fluid, wherein the drill cuttings in the samples are smaller than a predetermined threshold and repeating this step as necessary to provide samples of drill cuttings that arrive at surface at different recorded times; characterizing drill cuttings in the samples, comprising characterizing one or more formation attributes associated with the drill cuttings; and for each formation attribute estimating a distribution of formation attribute characterization versus depth of provenance, comprising defining a hydrodynamic transport of the characterized drill cuttings within the drilling fluid, including an effect of diffusion and dispersion on the hydrodynamic transport.

Exemplary embodiments provide an image vision processing method, device and equipment and relate to: determining parallax and depth information of event pixel points in a dual-camera frame image acquired by Dynamic Vision Sensors; determining multiple neighboring event pixel points of each non-event pixel point in the dual-camera frame image; determining, according to location information of each neighboring event pixel point of each non-event pixel point, depth information of the non-event pixel point; and performing processing according to the depth information of each pixel point in the dual-camera frame image. Since non-event pixel points are not required to participate in the matching of pixel points, even if it is difficult to distinguish between the non-event pixel points or the non-event pixel points are occluded, depth information of the non-event pixel points can be accurately determined according to the location information of neighboring event pixel points.

The invention discloses a milling device and a milling method for inner-hole oil grooves and belongs to the field of machine manufacturing. The milling device comprises a horizontal feeding mechanism, a vertical feeding mechanism, a first circumferential feeding mechanism, a second circumferential feeding mechanism, a first cutting mechanism and a clamping mechanism, which are arranged on a frame, wherein the first circumferential feeding mechanism rotates to drive the clamping mechanism; the horizontal feeding mechanism drives the first circumferential feeding mechanism and the clamping mechanism to move horizontally; the second circumferential feeding mechanism rotates to drive the first cutting mechanism; the vertical feeding mechanism drives the second circumferential feeding mechanism and the first cutting mechanism to move vertically; the first cutting mechanism and the clamping mechanism cooperate with each other and are arranged from the top down in the vertical direction. The technical scheme provided by the invention realizes a double-shaft and double-rotating oil groove processing way through combination of double circumferential feeding, vertical feeding and depth-direction feeding; the structure is compact; the production efficiency of inner-hole oil grooves can be improved greatly.

The invention provides a method and a device for inverting sea water depth by use of data of an underwater detector and a land detector. The method comprises acquiring the data of the underwater detector and the land detector, segmenting the data of the underwater detector and the land detector, calculating up and down wave field data of each segment, performing Fourier transform on the up and down wave field data of each segment, calculating the self-correlation power spectrum of each segment and the cross-correlation power spectrum of each segment, calculating a mean self-correlation power spectrum and a mean cross-correlation power spectrum, calculating a normalized correlation power spectrum, calculating a cross-correlation function of the seismic data of the underwater detector and the seismic data of the land detector according to the normalized correlation power spectrum, determining the maximum value of the cross-correlation function, and calculating the sea water depth according to the maximum value. The method for inverting the sea water depth by use of the data of the underwater detector and the land detector is used for solving the technical problem of large error of a sea water depth value calculated by use of the prior art, and achieves the technical effect of effectively improving the seawater depth calculation accuracy.

The present invention discloses an acquisition method and an acquisition device of a color depth image. The acquisition method comprises the steps of collecting first depth data and a color image comprising second depth data in a target area, wherein the accuracy of the first depth data is greater than the accuracy of the second depth data; performing registration on the first depth data and the second depth data; and using an RGB value of the color image as an RGB value of the first depth data by using a registration result, so as to obtain a color depth image of the target area. Through adoption of the method, the RGB value of the color image can be assigned to the first depth data of high accuracy, so as to obtain the color depth image of high accuracy and depth.

A camera objective for a camera includes a mask having a plurality of masking sections which are permeable for radiation of a first spectral range and are impermeable for radiation of a second spectral range different from the first spectral range. A camera system includes a digital camera for taking images. The camera system includes such a camera objective and an optoelectronic sensor arrangement having a plurality of sensor elements for generating exposure-dependent received signals which form a respective image. The plurality of sensor elements includes a first group of sensor elements for generating received signals in dependence only on radiation of the first spectral range and a second group of sensor elements for generating received signals in dependence on radiation of the second spectral range.

The invention discloses a three-dimensional face acquisition method and device based on a trinocular camera. The method includes: projecting the face key points into the left IR speckle texture face image and the right IR speckle texture face image; calculating coordinates of corresponding face key points in the left IR speckle texture face image and the right IR speckle texture face image, iterating projection positions of the face key points on the left IR speckle texture face image and the right IR speckle texture face image, correcting errors, finally traversing the whole RGB face image toobtain an accurate face depth map, and obtaining a final face point cloud by utilizing internal reference matrix back projection. The binocular stereo matching algorithm is enabled to perform high-precision matching by utilizing normal information so that the influence of human face curved surface affine transformation can be eliminated and the depth precision can be enhanced; through the face depth map with reduced resolution, the search range of the stereo matching parallax of the original resolution in the epipolar direction is constrained, the calculation complexity is greatly reduced, and the algorithm calculation efficiency is improved.

The embodiment of the invention discloses a TOF equipment calibration method and system, and a calibration box body, and the method comprises the steps of adding a calibration plate with multiple reflectivity into the fixed calibration box body for the calibration of a harmonic error and a depth error, and obtaining a depth error function through the training of a fitting model, thus achieving thequick calibration and elimination of the depth errors caused by odd harmonics generated by the system and intensity changes of reflection signals, and improving the depth precision performance.

A locating method, a locating device, a depth determining method, and a depth determining device of an operating body are provided. The locating method includes following steps: deriving an image that includes an operating body; scanning the image transversely according to each of scan lines of the image, and deriving each of width values of the operating body in each of the scan lines according to the bright dot information in each of the scan lines of the image; calculating a relative variation level between each of the width values in the adjacent scan line sequentially; when the relative variation level is less than a threshold, determining a locating point of the operating body according to one of the scan lines and one of the width values corresponding to the relative variation level.

In a method for time-of-flight (ToF) based measurement, a scene is illuminated using a ToF light source modulated at a first modulation frequency FMOD(1). While the light is modulated using FMOD(1), depths are measured to respective surface points within the scene, where the surface points are represented by a plurality of respective pixels. At least one statistical distribution parameter is computed for the depths. A second modulation frequency FMOD(2) higher than FMOD(1) is determined based on the at least one statistical distribution parameter. The depths are then re-measured using FMOD(2) to achieve a higher depth accuracy.

The invention discloses a milling cutter tool setting mechanism, a milling machine and a milling cutter tool setting control method. The milling cutter tool setting mechanism is arranged on a workbench of the milling machine, the workbench is provided with a workpiece mounting groove, the milling cutter tool setting mechanism comprises a moving part and an in-place sensor, wherein the moving part is arranged in the workpiece mounting groove and can move in the setting and feeding direction of the milling machine, and the tool setting and feeding direction is perpendicular to the workbench; and the in-place sensor is fixedly arranged on the workbench and is arranged on the side, deviating from a milling cutter, of a moving part, and the in-place sensor is used for sending out a tool setting completion signal when the moving part is pushed by the milling cutter to trigger the in-place sensor. According to the milling cutter tool setting device, a milling cutter mounting height parameter value with higher precision can be obtained, specifically, the milling cutter tool setting precision is higher.

A method of fabricating a composite ferrite sheet including the steps of: (a) forming a grooved green ferrite sheet having a non-intersecting grid pattern by pressing a groove forming die including a plurality of first protrusions and a plurality of second protrusions having a triangular cross sectional shape, each protrusion of at least one of the plurality of first protrusions and the plurality of second protrusions being discontinuous at each imaginary intersecting portion at which extension lines of the respective first and second protrusions intersect each other, (b) firing the grooved ferrite green sheet to obtain a sintered ferrite sheet, (c) bonding at least one supporting sheet to at least one of opposite major surfaces of the sintered ferrite sheet, and (d) rupturing the sintered ferrite sheet along the grooves into a multiplicity of separate and independent rectangular planar ferrite segments which are bonded to the supporting sheet.

The invention discloses a fixed-depth water sample collection device, which comprises: a base body having a water collection chamber, wherein the upper end and the lower end of the water collection chamber are respectively provided with a one-way valve and a water inlet hole, and the one-way valve allows a water sample in the water collection chamber to flow out in a one-way manner; a sealing mechanism which is fixed to the base body and comprises a plugging piece capable of moving towards the water inlet hole to seal the water inlet hole; and a pressure sensor which is arranged at the bottomof the base body and is electrically connected with the sealing mechanism; the gravity center of the base body is located below the water inlet hole. According to the fixed-depth water sample collection device, it is guaranteed that water in the water collection chamber is a water sample with the preset depth, an existing mode of judging the sampling depth through a rope and the like is abandoned,the water collection efficiency in water environment investigation is improved, the depth precision of water sample collection is improved to a large extent, and the water collection cost is reduced.

The invention relates to a production process for improving blind routing depth accuracy, in particular to a method for improving the depth accuracy of a blind routing area on a printed circuit board and meeting the requirement of a customer on the high depth accuracy of the blind routing area, belonging to the field of electronic techniques. A first substrate, a second substrate and a third substrate are double-side copper foil substrates. The production process comprises the steps of etching the first substrate, etching the second substrate and the third substrate and spreading glue; and respectively covering the upper surface and the lower surface by using the drilled second substrate and the drilled third substrate and performing positioning and press-fitting. The production process for improving blind routing depth accuracy has the advantages that the equipment cost is saved, the process is simple, the operation is simple and convenient to perform, the depth accuracy is high and the production process is stable.

The invention discloses a VCSEL array for a 3D depth acquisition device. The VCSEL array comprises light-emitting assemblies and a semiconductor substrate, and the light-emitting assemblies are distributed on the surface of the semiconductor substrate and comprise at least two light-emitting unit groups, wherein each light-emitting unit group comprises a plurality of light-emitting units which arecommunicated with one another, the light-emitting unit groups are distributed on the semiconductor substrate in a mutually staggered manner according to the respective corresponding patterns, and thepatterns corresponding to the light-emitting assemblies formed by the patterns corresponding to the light-emitting unit groups are irregular patterns. The 3D depth acquisition device is provided withat least two groups of wires, and each group of wires is connected with and is used for driving each light-emitting unit group. The invention also discloses a processing method of the VCSEL array andthe 3D depth acquisition device. According to the present invention, the depth precision and the energy consumption obtained in specific 3D application can be well balanced.

The invention is suitable for the military field, and provides a hand throwing type underwater explosion device. The hand throwing type underwater explosion device comprises a shell and further comprises an ammunition shell device, a manual safety device manual safety device, and a trigger device, the ammunition shell device installed on one side of the shell and used for serving as an installation carrier of internal ammunition; the manual safety device is mounted in the ammunition shell device and is used for manually releasing external safety on the surface of the shell; and the trigger device is mounted on one side of the manual safety device and is used for detonating explosives in a specific water depth. The hand throwing type underwater explosion device has the following advantages that the number of gears and the depth value of each gear can be set as required; double-environmental-force insurance of a manual safety pin and an electric safety mechanism is provided, and the safety is high; underwater fixed-depth or fixed-time explosion can be realized; the fixed-depth precision is high during underwater fixed-depth explosion; explosion at any depth within the underwater range of several meters to hundreds of meters can be realized; the sinking speed is high after being thrown into water; and the explosive power can be adjusted as required.