636results about How to "Accurate distance" patented technology

A pedicle screw assembly and method of assembly comprises a longitudinal member; a screw head comprising a bulbous end, wherein the screw head has a slot adapted to receive the longitudinal member; a bone fixator component comprising a concave socket having a biased angled top and a rounded bottom adapted to receive the screw head; a locking pin adapted to engage the screw head, the bone fixator component, and the longitudinal member; and a blocker adapted to engage the screw head and to secure the longitudinal member. Additionally, the bone fixator component may be configured as any of a bone screw and a hook.

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.

A system and method for measuring a parameter of a target in accordance with embodiments of the present invention includes transmitting at least one signal towards a target and receiving at least a portion of the transmitted signal back from the target. The measured parameter is one of distance velocity, or reflectivity. The transmitted signal is of the coherent burst waveform, and upon reception is processed with equivalent time sampling, AGC with minimal, if any, error, and a discrete Fourier transform.

Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.

The present invention discloses a centralized, digital, computer-based telephone call management system for authenticating users of a telephone system in an institutional facility. The system includes the capacity to allow an institution to control, record, monitor, and bill and report usage and access to a telephone network. The telephone call management system further includes both accounting and management software for use in controlling, monitoring, billing, recording, and reporting usage and access. Also, it can operate over both a Public Switch Telephone Network (PSTN) and a Voice over Internet Protocol (VOIP) infrastructure.

An image capture device according to the present disclosure includes: an image sensor; a lens optical system condensing light onto the image sensor and including a focus lens; a driving section driving one of the image sensor and the focus lens to change a distance between the image sensor and the focus lens; a displacement control section configured to control the displacement of the one being driven according to a predetermined displacement pattern by outputting an instruction to the driving section; and a synchronizing section configured to control the displacement control section by reference to timing of exposure of the image sensor. The displacement range of the image sensor or focus lens includes a first range, a second range separated from the first range, and a third range interposed between the first and second ranges. The predetermined displacement pattern includes first, second and third types of displacement patterns according to which one of the image sensor and the focus lens is displaced at least once in each of the entire first, second and third ranges. And one of the first and second types of displacement patterns and the third type of displacement pattern are repeated alternately.

Aspects of the invention relate generally to autonomous vehicles. The features described improve the safety, use, driver experience, and performance of these vehicles by using ground markers to determine the position of the surrounding objects. In particular, the autonomous vehicle is capable of detecting nearby objects, such as vehicles and pedestrians, and is able to determine the position of these objects based on whether they have passed over ground markers.

Micromachined passive alignment assemblies and methods of using and making the same are provided. The alignment assemblies are used to align at least one optical element. The alignment assemblies may be configured with kinematic, pseudo-kinematic, redundant or degenerate support structures. One alignment assembly comprises a base and a payload, which supports at least one optical element. The payload may be coupled to the base via connecting structures. The base, the payload and/or the connecting structures may have internal flexure assemblies for preloading a connection, thermal compensation and/or strain isolation.

An image capturing module according to the present invention includes a holder member, which accommodates therein a focusing lens for forming an image of a subject light on an image capturing chip attached on a substrate and is attached to the substrate to cover the image capturing chip, where the holder member is directly supported on a surface of the image capturing chip.

A distance between at least one antenna of an interrogation system and a transponder, such as an RFID tag, is determined based on derivatives with respect to frequency of the phase and the signal strength of responses transmitted by the transponder and received at the at least one antenna. The derivatives of the phase and the signal strength facilitate compensating for sources of multipath interference. Determining changes in distance may further facilitate determining location, speed, or bearing of the transponder by the interrogation system.

Disclosed embodiments, as well as features and aspects thereof, are directed towards providing a system, device and method for calculating comprehensive ballistic solutions, or portions thereof, via a varying magnification optical range determining and ballistic trajectory calculating apparatus referred to as a ballistic solutions device. Advantageously, embodiments of a ballistic solutions device may drastically reduce marksman error in milling targets by employing a measurement component configured to measure angular movement of a projectile launching device, such as a rifle, thus delivering consistently accurate distance to target estimations. Additionally, embodiments of a ballistic solutions device may also comprise features and aspects that enable a user to leverage available real-time field data such that error associated with the measurement of those variables is minimized prior to calculating and rendering a comprehensive ballistic solution derived from stored DOPE.

Apparatus and method for electronically estimating focusing distance between a camera (still and/or video camera) and a subject. Images at different focal positions of a calibration target are collected with distances between subject positions. In one aspect, histogram matching is performed to reduce noise error. A focus matching model is then generated in response to detected blur differences between successive images of the calibration target. The focus matching model is preferably converted to a polynomial equation of a desired order to smooth out image collection noise. The focus matching model is stored for access during operation. In use, the distance to subject is estimated in response to capturing images, detecting blur differences between the images and entering the blur difference information into the matching model.

The methods of the present invention are directed at an accurate phase-based technique for measuring arbitrarily long optical distances with sub-nanometer precision. A preferred embodiment of the present invention method employs a interferometer, for example, a Michelson interferometer, with a pair of harmonically related light sources, one continuous wave (CW) and a second source having low coherence. By slightly adjusting the center wavelength of the low coherence source between scans of the target sample, the phase relationship between the heterodyne signals of the CW and low coherence light is used to measure the separation between reflecting interfaces with sub-nanometer precision. As the preferred embodiment of this method is completely free of 2π ambiguity, an issue that plagues most phase-based techniques, it can be used to measure arbitrarily long optical distances without loss of precision.

The invention provides a driver assistance system and method based on a millimetre-wave radar, a terminal and a storage medium. The driver assistance system based on the millimetre-wave radar comprises at least one millimetre-wave (mmW) transceiver (Tx/Rx), an original data processing unit, a dynamic and static separation unit, a fusion unit, an analysis unit and a decision-making unit. The driverassistance system based on the millimetre-wave radar in the invention does not depend on a visual sensor; point cloud data singly obtained by the millimetre-wave radar is subjected to pre-processing,fusion, dynamic and static separation, individual semantic acquisition, tracking and analysis; therefore, the effect having the same target obtained by image processing through the visual sensor canbe achieved; furthermore, fusion between visual perception data and radar perception data can be utilized in the invention; then, processing or analysis is carried out; for target object tracking, therelative distance, speed and angle data are relatively precise in the invention; and thus, the driver assistance system disclosed by the invention is more suitable for being used in complex scenes having relatively high people flow, such as a parking lot, a garden and a basement.

The embodiment of the invention provides a method, device and system for detecting damage of fan blades based on an unmanned aerial vehicle. The method comprises the steps of receiving an image set of the fan blades shot from the unmanned aerial vehicle when the unmanned aerial vehicle flies along a preset airline and information of the located space position when each image in the image set is shot; determining information of the blade region where the unmanned aerial vehicle is located when the unmanned aerial vehicle shoots each image according to the locking state of the draught fan blades and the information of the space position; conducting image recognition on the image set, and obtaining the images of the damaged draught fan blades; conducting damage location on the draught fan blades according to the information of the space position and the information of the blade region which correspond to the images of the damaged draught fan blades, and obtaining damage position information; generating a damage detecting report according to the damage position information. According to the method, device and system for detecting the damage of the fan blades based on the unmanned aerial vehicle, the purpose of utilizing the unmanned aerial vehicle to automatically and accurately detect the damage of the draught fan blades is achieved, the detecting efficiency is improved, technological support is provided for follow-up blade maintenance, and the working hours and cost are saved.

A method for estimating the distance (d) of a receiver (102) from a radio transmitter (101) includes the steps of: receiving (602) radio signals (103, 701) irradiated by the transmitter (101), which include components from which at least three tones (1,2,3,4) are extracted, each having a different frequency; measuring (606) a first phase difference (Δφ₂₁) between first two tones (1, 2) of the at least three tones, whose frequencies (f₁, f₂) have a first spacing, and measuring a second phase difference (Δφ₄₃) between second two tones (3, 4) of the at least three tones, whose frequencies (f₃, f₄) have a second spacing, wherein one of the first spacing or second spacing is greater than the other; estimating (607, 611, 613) the distance (d) on the basis of the first phase difference (Δφ₂₁) and the second phase difference (Δφ₄₃).