402 results about "Self-stabilization" patented technology

A microprobe array structure with self-stabilization capability and a method for manufacturing the same are proposed. The microprobe array structure is used to sense various biopotential signals, and is characterized in that the etching parameters are controlled during etching to manufacture a microprobe structure with a reduced bottom cross section so that the microprobe can be firmly stabilized in the skin tissue. Moreover, a conducting layer is formed on the microprobe to sense signals. A design of electric isolation between microprobes is also proposed. The microprobe array can therefore be used for the measurement of various biopotential signals, and can also be used as a stimulus.

A method of improving image quality of a digital image is provided. In particular, the motion blur in an image taken in a long exposure time is reduced by dividing the exposure time into several shorter periods and capturing a series of images in those shorter periods. Among the images, one reference image is selected and the remaining images are registered in reference to the reference image by image warping, for example. After identifying the pixels in each of the remaining images and the corresponding pixels in the reference image, a weighting factor is assigned to each of the pixels in the remaining images based on the similarity in the pixel values between the remaining images and reference image. A weight average operation is carried out to sum the corresponding pixels in the reference and the remaining images to generate the final image.

Techniques described herein provide a method for improved image and video stabilization using inertial sensors. Gyroscopes, accelerometers and magnetometers are examples of such inertial sensors. The movement of the camera causes shifts in the image captured. Image processing techniques may be used to track the shift in the image on a frame-by-frame basis. The movement of the camera may be tracked using inertial sensors. By calculating the degree of similarity between the image shift as predicted by image processing techniques with shift of the device estimated using one or more inertial sensor, the device may estimate the portions of the image that are stationary and those that are moving. Stationary portions of the image may be used to transform and align the images. For video stabilization, the realigned images may be combined to generate the video. For image stabilization, the realigned images may be either added or averaged to generate the de-blurred image.

A method and system for transient and switching stabilization of a fiber optic transport system. One or more data-bearing channels are coupled to an optical fiber. The data-bearing channels are distributed among a plurality of frequency sub-bands. A set of control channels is also coupled to the optical fiber. Each control channel includes a pair of signals at separate frequencies. There is at least one control channel in each of the plurality of frequency sub-bands. The pair of signals of a control channel are cross-polarized. Optical power in at least one of the plurality of sub-bands is measured. Responsive to the measured optical power, the optical power of a control channel is adjusted to maintain a substantially constant power of a sub-band that contains the adjusted control channel.

The invention discloses a preparation method of functional hollow polymer microspheres. The shell of the functional hollow polymer microspheres is prepared by carrying out precipitation polymerization on a functional monomer and a crosslinking agent in different ratios; and the formed crosslinked shell has a mesoporous structure. The preparation method comprises the following steps: preparing a monodisperse polymer microsphere template by self-stabilization precipitation polymerization; directly adding the reaction system into the shell without separation to form the required functional monomer and crosslinking agent, and preparing core-shell polymer microspheres of which the shell has a crosslinked mesoporous structure by precipitation polymerization; and finally, removing the polymer microsphere core by solvent dissolution to obtain the functional hollow polymer microspheres. The technique is simple, and safe and convenient to operate, has the advantages of mild reaction conditions, no need of special equipment, high preparation efficiency, easy microsphere separation, controllable size, and very high functional group content in the polymer microspheres, and lays a foundation for large-scale industrial production of the functional hollow polymer microspheres.

An apparatus that is capable of achieving self-stabilization while walking comprises two front legs and two rear legs with each leg having three joints including a hip joint, an upper leg joint, and a lower leg joint. Each joint is powered by a motor and is monitored by an encoder, totaling twelve of each for the entire apparatus. Stability is maintained by adding weight to the two front legs and by positioning a separate weight toward the front and middle of the apparatus, thereby moving the center of balance of the apparatus further within the stability envelope of the apparatus. As a result, the apparatus maintains its stability by itself without the need for additional CPU's. The apparatus also includes an animation motor that is capable of causing the apparatus to make non-ambulatory movement and a cartridge slot which allows the user to download new programming which facilitates new behavior being exhibited by the apparatus.

Real-time image stabilization using computationally efficient corner detection and correspondence is provided. The real-time image stabilization performs a scene learning process on a first frame of an input video to obtain reference features and a detection threshold value. The presence of jitter is determined in a current frame of the input video by comparing features of the current frame against the reference features using the detection threshold value. If the current frame is found to be unstable, corner points are obtained from the current frame. The obtained corner points are matched against reference corner points of the reference features. If the number of matched corner points is not less than a match point threshold value, the current frame is modeled using random sample consensus. The current frame is corrected to compensate for the jitter based on the results of the modeling.

The invention relates to an engineering technique for a lead double-row grouting small duct, which has the specific procedures of: first of all, excavate a structure shaft, then install a steel grate and then position double-row small conduct on the steel grate. The arc inclined angle between the small duct and the outline of the steel grate are respectively set as 7 to 10 degrees and 30 to 60 degrees with circular space of 0.3 to 0.4m. Then, grout into the small duct; excavate the soil body as per the requirement on the longitudinal space of steel grate after the grouted soil body reaches required strength; position another steel grate and position the double-row grouting small duct till the last steel grate is installed. The invention has the advantages that: during the engineering on large section hidden excavated tunnel, especially getting through the sand layer and gravel (pebble) layer at with no cohesion and insufficient self-stabilization capacity at the bottom of constructions and the arc of tunnel, this invention, by positioning the two-row grouting small duct on the ground layer, is able to realize comprehensive reinforcement of the ground layer and form a secondary buffering shell body based on the original reinforcement shell body, thus further alleviating or preventing the settlement after the breaking of ground layer and the damages to constructions (architectures).

An apparatus that is capable of achieving self-stabilization while walking comprises two front legs and two rear legs with each leg having three joints including a hip joint, an upper leg joint, and a lower leg joint. Each joint is powered by a motor and is monitored by an encoder, totaling twelve of each for the entire apparatus. Stability is maintained by adding weight to the two front legs and by positioning a separate weight toward the front and middle of the apparatus, thereby moving the center of balance of the apparatus further within the stability envelope of the apparatus. As a result, the apparatus maintains its stability by itself without the need for additional CPU's. The apparatus also includes an animation motor that is capable of causing the apparatus to make non-ambulatory movement and a cartridge slot which allows the user to download new programming which facilitates new behavior being exhibited by the apparatus.

A hand-held or vehicle-mounted stabilization system including a platform supported by two or more rotatably-coupled gimbal frames each having a pivot assembly disposed at its rotation axis to couple an actuator to a rotation sensor having a rotation-sensitive sensor axis that is preferably fixedly disposed with respect to the rotation axis, and a controller for accepting the sensor signals and for producing each motor signal needed to dispose the platform in a predetermined angular position with respect to each rotation axis independent of changes in mount orientation. An alternative embodiment includes a controller for accepting an external slew signal sequence and for producing the motor signals needed to move the platform along a predetermined sequence of positions represented by the slew signal sequence.

Disclosed is a self-adaption claw mechanism of a spatial on-orbit service robot. The self-adaption claw mechanism is composed of a self-adaption claw, a motor, a transmission mechanism of the motor and a base part. The self-adaption claw is used for achieving the function of on-orbit target object capturing. The motor and the transmission mechanism of the motor are used for transmitting torque, and the motor provides active torque. The base part is used for maintaining the relative positions of all the parts of a system. The self-adaption claw mechanism has adaptivity, so that grabbing modes can be selected in a self-adaption mode according to the shapes of target objects, and the universality is strong. The claw mechanism has auto-stability, and after the claw mechanism makes contact with the target objects, the post grabbing process is prone to self-stabilization due to the fact that a torsion spring which has the effect of adjusting the torque in a passive mode is adopted. The active and passive composite driving design with the single motor and the torsion spring combined is adopted in the mechanism, so that control strategies are simplified, and impulsive loads can be effectively buffered. The self-adaption claw mechanism is applied to the on-orbit robot, and greatly improves the task executing efficiency.

The invention discloses a holder control method. The method comprises the steps that a current posture and a target posture of a controlled end, a current posture of a fixed end and rotation inertia ratio of the fixed end to the controlled end on a holder are acquired; according to the current posture and the target posture of the controlled end, the current posture of the fixed end and the rotation inertia ratio of the fixed end to the controlled end, effective mechanical energy controlling the controlled end is calculated and acquired; and according to the effective mechanical energy, the controlled end is controlled to maintain a stable state. The invention further discloses a holder control device. According to the invention, the controlled end reaches the target posture and maintains the stable state; the holder is precisely controlled; body disturbance is effectively isolated; self-stabilization control of the holder is realized; and the imaging quality of a holder load camera is ensured.

A motion sensor is used to sense the movement of the camera during an exposure period. The camera has an image sensor to form one or more exposures. When the movement is within a certain range, the exposures are used to provide one or more frames so that an image can be constructed based on the frames. In one embodiment, the exposure period is divided into several short intervals in order to capture several image frames and only the image frames captured when the position of the camera is within a predetermined range are used to form the final image. The exposure time for each frame is small in order to reduce the motion blur degradation of the individual frames. If the camera is stable and substantially stationary relative to the scene, then all or many of the shorter frames are used to form the final image.

An aerial balloon system comprising a payload platform suspended from an inflated balloon by means of a balloon cable, and an anchoring cable attaching the platform to an anchor point beneath it. The balloon cable and anchoring cable are attached to the payload platform by means of a connecting element pivotally attached to the platform. The platform may include a servo controlled pitch stabilizing system using the input from a pitch sensor mounted on the platform to control an angular actuator to change the angle which the platform makes with the pivoted connection element. Additionally, the platform may include a servo controlled orientation stabilizing system using the input from an orientation sensor mounted thereon to control the departure of the orientation of the platform from a predetermined orientation. This may be readily accomplished using a variable pitch rotor, the pitch being controlled by the orientation sensor signal.

The invention discloses a supporting method for soft broken nonuniform stratum tunnel construction. The supporting method includes the steps that firstly, an arch support is erected in a bottom layer tunnel through steel pipes, and the portion, on the top of the arch support, of the bottom layer tunnel is drilled; secondly, a small pipe roof is constructed on the drilled portion of the arch crown of the arch support; thirdly, during construction of the small pipe roof for supporting, advanced reinforcement treatment is conducted on a top arch of the tunnel through advanced small pipes in a floor staggered mode; fourthly, the tunnel is excavated; fifthly, after the tunnel is excavated, preliminary supporting construction is conducted in time each cycle; sixthly, after excavation and supporting of a tunnel trunk of the tunnel, an inverted arch is constructed and sealed into a loop; and then secondary lining following operation is conducted. The method has the advantages that deformation of tunnel surrounding rocks can be effectively reduced, self-stabilization and seepage prevention capacity of the tunnel is permanently improved, a multifunctional surrounding rock reinforcement region is formed, and safety of tunnel constructors and equipment is guaranteed.

Methods and devices for a coupled optoelectronic oscillator having optical frequency stabilization. The coupled optoelectronic oscillator includes a harmonically mode-locked laser cavity having a Mach-Zehnder modulator for mode-locking and an intracavity Fabry-Perot etalon to allow only one single supermode to lase, a stabilization loop coupled with the Fabry-Perot etalon to detect changes in the laser cavity optical frequency and generate an error signal to compensate for the frequency change to stabilize the mode-locking of the laser frequency stabilization, and an electrical loop between the laser cavity and the stabilization loop for driving the Mach-Zehnder modulator with the coupled optoelectronic oscillator signal.

Images with an overall field of view (FOV) may be captured during an endoscopic procedure but only a portion of the overall FOV displayed to an endoscopist. The overall FOV may be analyzed to identify an area of interest of a patient's organ based on the presence of a possible lesion during the endoscopic procedure. The endoscopist may be notified of the identified area of interest. After an area of interest is identified, the location of the area of interest may be tracked. Image stabilization may be provided by changing the displayed portion of the overall FOV to maintain the area of interest within the displayed portion as the area of interest moves relative to the endoscope.

An apparatus to facilitate image stabilization with adaptive shutter control is described. An embodiment of the apparatus includes an image sensor, a movement detector, and a shutter controller. The movement detector is coupled to the image sensor. The shutter controller is coupled to the movement detector. The image sensor is configured to obtain image data. The movement detector is configured to obtain movement measurement information during a shutter period having a predetermined duration. The shutter controller is configured to adjust the shutter period of a shutter based on the movement measurement information. The shutter controls the time the image sensor is responsive to light incident on the image sensor. Embodiments of the apparatus provide a smaller and less costly implementation for image stabilization.

A video stabilization system processes a video segment to remove unwanted motion, resulting in a stabilized video segment. The video stabilization system tracks one or more features through multiple frames, identifies ideal positions for the features, and then generates information (e.g., rotation, scaling, shearing, and / or translation) to transform all pixels in each frame to ideal positions based on the ideal positions of the features.

The invention provides a flight control debugging protecting device of a multi-rotor-wing unmanned plane. By the flight control debugging protecting device of the multi-rotor-wing unmanned plane, self-stabilization performance of a flight control system of the multi-rotor-wing unmanned plane can be debugged, and test safety is ensured. The flight control debugging protecting device of the multi-rotor-wing unmanned plane is based on a rigid body dynamics principle of flight of the multi-rotor-wing unmanned plane and comprises a triangular rack and four changeable flight control debugging modules; the movement type of the multi-rotor-wing unmanned plane is limited through a mechanical structure; three single degrees of freedom, including rolling, pitching and heading, of the flight control system of the unmanned plane can be debugged independently, and the three degrees of freedom can be debugged comprehensively; after control responses of the multi-rotor-wing unmanned plane are observed when the protecting device runs on different modules, actual performance of new skills and new methods which are used by the unmanned plane are clear; and self-stabilization of the flight control system can be subjected to functional partitioning, research and development engineering management is facilitated, debugging of the unmanned plane can be protected, possible property loss caused by blind trial flight is avoided, research and development risks and difficulties are reduced, and development of the industry of multi-rotor-wing unmanned planes is promoted.

The invention discloses a gravity self-stabilization picking machine. The gravity self-stabilization picking machine comprises a three-claw mechanical arm, a supporting rod and a movable cart, whereinthe three-claw mechanical arm comprises a gravity self-stabilization base and a three-claw clamping apparatus, and the gravity self-stabilization base comprises a U-shaped foundation support, an adjusting rod and a balance weight; and the three-claw clamping apparatus comprises a three-claw clamping mechanism and a rotating motor, the rotating motor is fixed at the outer side of the U-shaped foundation support, the three-claw clamping mechanism comprises a stander, a three-claw manipulator, a transmission assembly and a drive device, the drive device is fixed on the stander, and the stander is connected with an output shaft of the rotating motor in a rotating manner. The gravity self-stabilization picking machine is provided with the gravity self-stabilization base, when a picking objectis not picked, the gravity center of the three-claw mechanical arm is slightly lower than the middle part; after the picking object is picked, the picking object is separated from a fruit tree, the gravity center of the three-claw mechanical arm is slightly higher than the middle part to cause the overturning of the three-claw mechanical arm, and the picking object can vertically fall into a receiving bag; and after the picking object drops, the three-claw mechanical arm overturns again and is returned to an original state to prepare the next operation.

An arrangement for improving stability of a vehicle combination comprising a towing vehicle and at least one towed vehicle, where the at least one towed vehicle comprises at least one actively steered axle and / or individual brake on at least one axle, where the towing vehicle and the at least one towed vehicle each comprises a yaw rate determining means for determining the yaw rate of the vehicle and the at least one towed vehicle, where the arrangement further comprises a vehicle combination model adapted for determining a desired delay value between the yaw rate of the towing vehicle and the yaw rate of the at least one towed vehicle, where the arrangement is adapted to stabilise the at least one towed vehicle by using the determined yaw rate of the towing vehicle and the desired delay value for the at least one towed vehicle to establish a desired yaw rate for the at least one towed vehicle, and to control the steered axle and / or the individual brake of the at least one towed vehicle such that the determined yaw rate of the at least one towed vehicle corresponds to the desired yaw rate of the at least one towed vehicle. The yaw rate may be estimated or measured. The advantage of the invention is that the stability of a vehicle combination can be improved, which in turn improves the road safety.