52 results about "Angle independent" patented technology

A method employs an apparatus for generating a directional signal associated with the electromagnetic energy response of a subsurface formation. The method is useful to derive both the strike angle of formation boundary and the relative dip. The true dip and azimuth can be computed from the relative dip information coupled with borehole orientation. Other applications of the method are also described.

A high-contrast electro-optic liquid crystal camera iris (10) provides angle independent transmission for uniform gray shades. The liquid crystal iris comprises a combination of first and second liquid crystal devices (12, 14) arranged in optical series and positioned between optical polarizers (46, 48). The director field (18) of the second liquid crystal device is a mirror image of the director field (16) of the first liquid crystal device, and the first and second liquid crystal devices are placed together so that the azimuthal directions (42) of the surface-contacting directors (18c, 22c) are in parallel alignment at the adjoining or confronting surfaces of the substrates (242, 321) of the first and second liquid crystal devices. The liquid crystal iris provides, therefore, less angular variation of intermediate transmittances compared with that provided by prior art liquid crystal irises.

A method and apparatus for obtaining the absolute value of intracranial pressure in a non-invasive manner is described by using an ultrasonic Doppler measuring device which detects the intracranial and extracranial blood flow velocities of the intracranial and extracranial segments of the ophthalmic artery. The eye in which the blood flow is monitored is subjected to an external pressure, sufficient to equalize the intracranial and extracranial angle-independent blood flow factors calculated from the intracranial velocity signal and extracranial velocity signal. The absolute value of the intracranial pressure is identified as that external pressure at which such equalization occurs.

The invention relates to a flight path planning method for coordinated detection and obstacle avoidance of an unmanned aerial vehicle group. The method includes the following steps: S1. setting an unmanned aerial vehicle group flying area and designating a task monitoring area in the flying area; S2. defining yaw angle independent variables of N unmanned aerial vehicles, and initializing yaw angles, location coordinate information in the flying area, the number of current searching steps k=0, and the cumulative coverage percent=p1 on the task area at the current moment of the N unmanned aerialvehicles; S3. predicting flight path yaw angles and location information of (k+1) steps of the N unmanned aerial vehicles in the flying area, and separately calculating a coverage area and a fitnessfunction value; S4. comparing all possible fitness values, selecting a yaw angle and location information of an optimal fitness value as information of the (k+1)th step, and storing the yaw angle andthe location information in a flight path chart; and S5. enabling k=k+1, judging whether k=1 or percent=1, if yes, ending the planning, and otherwise, continuing S3 to S5. The method of the inventioncan realize the maximum monitoring coverage area, avoid obstacles and a required flight path has no fixed starting point and ending point.

The invention relates to the field of human body behavior recognition, in particular to an angle independence-based skeleton behavior recognition method, system and device, and aims to improve the accuracy of angle-independent skeleton behavior recognition. The angle independence-based skeleton behavior recognition method comprises the steps of designing a specific visual angle sub-network on thebasis of a skeleton sequence of each visual angle, focusing on key joint points and key frames through space domain attention and time domain attention modules respectively, and learning a discrimination characteristic of each visual angle sequence through a multi-layer long-short-term memory network; serially connecting output characteristics of all the specific visual angle sub-networks to serveas an input of a public sub-network, further learning angle-independent characteristics through a bidirectional long-short-term memory network, and focusing on a key visual angle through a visual angle attention module; and proposing a regularization cross entropy loss function for promoting the modules of the network to jointly learn. According to the skeleton behavior recognition method, systemand device, the recognition accuracy is effectively improved, and visual angle characteristics with relatively numerous learning information can be automatically focused.

A high-contrast electro-optic liquid crystal camera iris provides angle independent transmission for uniform gray shades. The liquid crystal iris comprises a combination of first and second liquid crystal devices arranged in optical series and positioned between optical polarizers. The director field of the second liquid crystal device is a mirror image of the director field of the first liquid crystal device, and the first and second liquid crystal devices are placed together so that the azimuthal directions of the surface-contacting directors are in parallel alignment at the adjoining or confronting surfaces of the substrates of the first and second liquid crystal devices. The liquid crystal iris provides, therefore, less angular variation of intermediate transmittances compared with that provided by prior art liquid crystal iris.

The invention relates to a pressure probe for characterizing the pressure and/or differential pressure in a fluid, and all derivatives, like for instance, flow rate. The device comprises a front side adapted for facing an upstream direction of the fluid flow, a bulbous part adapted for creating a region of low pressure, also called wake, and a flow detachment means. The front side allows creation of a region of high pressure. It has a planar shape or the shape of a recess. The device thus allows to be substantially flow angle independent, to be Reynolds number independent in a wide range of flow velocities and to obtain a large differential pressure gain.

This invention provides a system and method for finding features in images that exhibit saddle point-like structures using relatively computationally low-intensive processes, illustratively consisting of an anti-correlation process, and associated anti-correlation kernel, which operates upon a plurality of pixel neighborhoods within the image. This process enables an entire image to be quickly analyzed for any features that exhibit such saddle point-like structures by determining whether the anti-correlation kernel generates a weak or strong response in various positions within the image. The anti-correlation kernel is designed to generate a strong response regardless of the orientation of a saddle point-like structure. The anti-correlation process examines a plurality of pixel neighborhoods in the image, thereby locating any saddle point-like structures regardless of orientation, as it is angle-independent. The structures are then grouped and refined (for example in a grid) in an effort to locate and decode ID topologies within the image.

In a method for fast angulation changes in a C-arm x-ray system, and a foot switch for effecting such fast angulation, a pedal of the foot switch that normally has a function not related to angulation of the C-arm is either permanently, or temporarily programmed, to operate as a pedal that, when depressed, automatically moves the C-arm to a predetermined angulation. The pedal can be movable between two positions, in order to selectively, automatically move the C-arm to either of two predetermined angulation positions, or can be used in conjunction with another pedal for that purpose. The pedal can also be temporarily given a security function and/or a radiation triggering function.

The invention discloses a stacked filter for an image sensor containing an infrared ray pixel. The stacked filter includes a first filter layer disposed at the IR pixel. The first filter layer allows light with wavelengths of a first band to be transmitted through. The stacked filter further includes a second filter layer stacked with the first filter layer. The second filter layer allows light with wavelengths of a second band to be transmitted through. The first band partially overlaps the second band at wavelengths of a third band. The third band is narrower than the first band and the second band. The stacked filter allows light with the wavelengths of the third band to be transmitted through. Furthermore, an image sensor containing a stacked filter is also provided. The stacked filter is easy to manufacture, and the characteristics of the stacked filter have no relation with the angle of the incident ray and are not influenced by the angle of the incident ray. Therefore, the stacked filter can avoide generation of blue shift situation when an inclined incident ray with a large angle irradiates on the image sensor.

The invention discloses a morphology-controllable and color angle-independent photonic crystal particle and its preparation method. The preparation method comprises the following steps: mixing Fe3O4 nanoparticles, carbon black nanoparticles, graphene nanoparticles or a mixture of the Fe3O4 nanoparticles, carbon black nanoparticles and graphene nanoparticles with an emulsion containing monodisperse colloidal microspheres; printing a mixture obtained onto a superhydrophobic substrate by a spraying, dispensing or inkjet mode so as to form emulsion droplets with diameter being 11microns -1.6 mm; and drying to obtain the ellipsoidal color angle-independent colored photonic crystal particle with its length-diameter ratio being controllable. The photonic crystal particle is colourfast and environmentally friendly and has a wide application prospect in fields of pigment, display, sensing and the like.

Methods and an x-ray source for sweeping an x-ray beam across an object of inspection. A beam of electrons is emitted by a cathode, while a sweep controller applies a signal to a beam controller in a prescribed path on an anode, thereby causing an x-ray beam to be emitted from an aperture disposed at one apex of a snout of variable length. The aperture may be a Rommel aperture that allows for forming a scanning x-ray of desired size and flux independently of the angle at which the beam is emitted. Scanning rate may be varied during the course of a scan. Multiple x-ray beams may be formed simultaneously, where one beam is inside a conveyance while the other is outside the conveyance, for example.

A concrete funnel and placement system comprising a funnel-type apparatus removably securable to a concrete chute having a retainer element coupled to a funnel element. The funnel element includes a downwardly sloping base forming an aperture for concrete to flow through. The aperture may be any shape or size, and one or more interchangeable discharge plates may be included in order to selectively change the shape and/or size of the aperture. Further, the aperture of the funnel element may be selectively opened or closed. Bearings, sprockets, rollers or other rotatable mechanisms may be included to allow the funnel element to rotate 360° with respect to the retainer element. The retainer element may include a gasket forming a seal with the funnel element to prevent concrete from impeding rotation. The retainer element may be hingedly secured to the concrete chute allowing the retainer element to be adjusted such that it is substantially horizontal while pouring concrete, independent of the angle of the concrete chute. The funnel-type apparatus may be in communication with the concrete truck, thus allowing the rotation and adjustment of the funnel-type apparatus to be controlled by electronics, such that the operator may be located in the cab of the truck or other location.

An apparatus and method for relating echoes from a surface or object produced by irradiation, such as by sonar or radar, from different grazing angles according to the relationship:

A wavelength reference filter for receiving an input signal and producing a filtered output signal is provided. The operation of the filter is independent of the angle of incidence of the input signal. As a result, the output signal from the filter will maintain its wavelength, even under changes in the direction of propagation of the input signal to the filter. Without such incidence angle independence, a change to the input signal would change the output signal and result in inaccurate device operation. Example incidence angle independent filters may include a single etalon or multiple etalons. In the former example, a signal may traverse a single etalon twice, along paths that have different angular sensitivities relative to the etalon. In the latter example, each etalon may have an equal and opposite angular sensitivity, such that two the etalons have canceling angular sensitivities. All of the filters described and illustrated may be used in various devices, including detectors, laser sources (tunable and otherwise), and transponders.

The invention discloses a mechanical device for driving an adjustable stator blade by a servo motor. The mechanical device comprises an outer supporting ring, an inner supporting ring, the adjustablestatic blade between the inner supporting ring and the outer supporting ring, a driving gear, a ring gear, the servo motor for driving the ring gear, and a blade end gear arranged at the end of the adjustable stator blade; the driving gear is arranged on a rotating shaft of the servo motor; an arc-shaped rack engaged with the driving gear is arranged on the outer ring surface of the ring gear; anda driving rack engaged with the blade end gear is arranged on the side surface of the ring gear. According to the device, a complex servo oil pressure adjusting device is omitted, the risk of systemfailure caused by high-pressure hydraulic oil leakage is reduced, and the reliability of an engine is improved; and meanwhile, the angle independent adjustment of the adjustable stator blade of each stage is carried out through the ring gear component, so that the optimization of the performance of the engine can be better realized.

A technique and device for fluorescence observation with good operability, high sensitivity, acid high reliability. The device is used for fluorescence observation using evanescent light. The angle of incidence of the excitation light is adjusted so that the excitation light is always totally reflected from the surface of a substrate irrespective of the angle of the surface of the substrate. The method includes a step of shining the excitation light on the observation substrate while continuously varying the angle of the excitation light with respect to the observation substrate, a step of sensing the shone excitation light by means of optical sensors, and a step of setting the angle of total reflection according to the result of the sensing by the optical sensors. The direction in which the shone excitation light travels varies with the angle of incidence. That is, the excitation light travels as the transmitted light, the reflected light, or the surface propagating light. These lights are sensed by the corresponding optical sensors, and how the angle of incidence of the excitation light is with respect to the critical angle is determined. The angle of incidence of the excitation light is varied depending on the result of the determination, thereby realizing an optimum total reflection angle.