Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

1491results about "Angle measurement" patented technology

Camera based six degree-of-freedom target measuring and target tracking device with rotatable mirror

An embodiment may comprise a camera based target coordinate measuring system or apparatus for use in measuring the position of objects in manner that preserves a high level of accuracy. This high level of measurement accuracy is usually only associated with more expensive laser based devices. Many different arrangements are possible. Other embodiments may comprise related methods of using a camera based target coordinate measuring method for use in measuring the position of objects. Many variations on the methods are possible. For example, a camera based coordinate measuring system for use in measuring the position of a target relative to at least one frame of reference without requiring use of a laser range finder for measuring distance may comprise at least three or more light sources located on a target wherein the light sources are located on the target at known three-dimensional coordinates relative to each other; at least one rotatable mirror rotatable on about a first axis and a second axis; a camera located to receive light emitted by the light sources that is reflected off the minor; two angular measuring devices to measure the angles of rotation of the mirror about the first and second axes; and a processor for determining up to three positional degrees of freedom and up to three rotational degrees of freedom of the target.

Sensor for determining the angular position of a radiating point source in two dimensions and method of operation

A sensor for determining the angular position of a radiating point source in two dimensions includes a mask encoded in two skewed directions with waveforms consisting of several frequencies in prescribed patterns. The frequency spectra of the received detector patterns are computed. In order to facilitate such computations, the constituent frequencies are separated so as to be distinguished in the Fast Fourier Transform (FFT). Each of the frequency patterns that are coded on the variable transmissivity mask consists of a series of low frequencies followed by a series of variable frequencies, and a series of high frequencies. The variable frequencies exhibit frequency changes responsive to various image positions. The low and high frequencies are responsive in phase to variations in image position. The frequency variations in the variable frequencies are used to indicate coarse position while the phases of the fixed low and high frequencies are used to indicate medium and fine position. In a second embodiment, the mask pattern is formed by a first pattern including low variable and high frequency components, a second pattern with fixed low and high frequency components, and a third pattern with variable frequency components. The method of determining position is also disclosed.

Apparatus and method for determining orientation parameters of an elongate object

An apparatus and method employing principles of stereo vision for determining one or more orientation parameters and especially the second and third Euler angles θ, ψ of an elongate object whose tip is contacting a surface at a contact point. The apparatus has a projector mounted on the elongate object for illuminating the surface with a probe radiation in a known pattern from a first point of view and a detector mounted on the elongate object for detecting a scattered portion of the probe radiation returning from the surface to the elongate object from a second point of view. The orientation parameters are determined from a difference between the projected and detected probe radiation such as the difference between the shape of the feature produced by the projected probe radiation and the shape of the feature detected by the detector. The pattern of probe radiation is chosen to provide information for determination of the one or more orientation parameters and can include asymmetric patterns such as lines, ellipses, rectangles, polygons or the symmetric cases including circles, squares and regular polygons. To produce the patterns the projector can use a scanning arrangement or a structured light optic such as a holographic, diffractive, refractive or reflective element and any combinations thereof. The apparatus is suitable for determining the orientation of a jotting implement such as a pen, pencil or stylus.

Position and attitude parameter measurement system of machine body of boring machine and method thereof

The invention relates to a position and attitude parameter measurement system of a machine body of a boring machine and a method thereof, and the position and attitude parameter measurement system consists of a line laser transmitter, a rack of the line laser transmitter, laser targets, a programmable computer controller, an A/D conversion module and two inclination sensors. The line laser transmitter is positioned by a laser direction indicator and the rack of the line laser, emits a fan-shaped laser beam and forms linear spots on the machine body of the boring machine. An photosensitive element in one position on one of the two laser targets consisting of the photosensitive elements senses the laser beam and generates a current signal at any time, and the current signals are processed and calculated by an internal circuit of the laser targets and the programmable computer controller, thereby determining the positions of the laser beam on the laser targets; furthermore, the mounting positions of the laser targets on the boring machine are known, thereby obtaining a deflection angle and deflection displacement of the boring machine. Two inclination sensors measure a pitch angle and a roll angle of the boring machine, thereby completing the measurement of position and attitude parameters of the machine body of the boring machine. The system has the advantages of low cost, high precision, good real-time property and convenient operation.

Method and apparatus for determining the location of an occupant of a vehicle

A method and apparatus for use in locating the eyes of a vehicle driver or passenger in a vehicle for controlling vehicle systems including the positioning of vehicle sideview mirrors in relation to the driver's eyes to maximize the view of traffic on either side of the vehicle or the characteristics of vehicle airbag deployment. The location of a driver's or passenger's eyes is derived from the adjustment by the driver (or passenger, if capable of doing so) of adjustable light beam(s) emanating from light source(s) or illuminated indicia, until it (or they) intersect the driver's or passenger's eyes. From the angles of adjustment of the light beam(s) and other known coordinates of the vehicle, the location of the driver's or passenger's eyes or the target may be computationally derived as a set of Cartesian coordinates. The determined eye location of the driver may be used together with the known mounting locations of the driver's and passenger's sideview mirror assemblies to derive exterior sideview mirror pitch and azimuth adjustment signal sets correlated to the vehicle blind spots. The adjustment signals are applied to servo motors operating in a feedback control loop to correct the actual driver's side and passenger's side sideview mirror pitch and azimuth settings to properly reflect images of the driver's side and passenger'side vehicle blind spots to the driver's eyes. The determined eye locations of the driver and passenger may be also or alternatively employed in the control of the airbag deployment system and in other vehicle safety and comfort systems. The relative fore-aft distance away from the airbag and the height of the person or target can be computed, and airbag deployment force and/or duration adjusted to compensate for deviation from the standard height and fore-aft distance.

Dual mode adaptive threshold architecture for 3-D ladar FPA

An integrated detector and signal processor (31) for ladar focal plane arrays (30) which internally compensates for variations in detector gain, noise, and aerosol backscatter. The invention (31) is comprised of a detector element (42) for receiving an input signal, a circuit (72) for generating a threshold based on the RMS noise level of the input signal, and a circuit (74) determining when the input signal is above that threshold. The detector element (42) is physically located in the interior of the detector array (30), while the signal processing circuitry (50) is located on the periphery of the array (30). In the preferred embodiment, the signal processor (31) also includes a circuit (56) for sampling the input signal and a circuit (58) storing multiple samples, allowing for multiple returns to be detected. In the preferred embodiment, the signal processor (31) can be operated in two modes: self triggered and externally triggered (range-gate mode). In the self triggered mode, the detector continually monitors and samples the incoming signal until a return is detected (by the thresholding circuit). In the range-gate mode, the detector stops sampling when it receives a signal from an external source. Once the data has been acquired, readout electronics (66) output the stored samples along with the stored "stopped" time code to an external computer (26).
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products