摘要:
A phase/frequency detector has a modulo counter for outputting a counter word with a predetermined word length depending on an oscillator signal. In addition, a modulo integrator for outputting an integrator word with the predetermined word length as a function of integration of a channel word is provided. The phase/frequency detector also has a difference element for outputting a phase error word with the predetermined word length as a function of a difference between the counter word and the integrator word.
摘要:
A method serves for the determination of the 3D coordinates of an object (2). A fringe pattern is projected onto the object (2) in the method. The light reflected by the object (2) is recorded and evaluated. To improve such a method, the fringe pattern is projected onto the object (2) by an imaging element (only FIGURE).
摘要:
This invention relates to a method and an apparatus for the three-dimensional digitization of objects with a 3D sensor, which comprises a projector and one or more cameras, in which a pattern is projected onto the object by means of the projector, and the pattern is detected with the one or more cameras. In accordance with the invention, the method and the apparatus are characterized in that at least three reference marks and/or a reference raster are projected onto the object with the 3D sensor and are detected with two or more external, calibrated digital cameras.
摘要:
A polar modulator arrangement has a first and a second node to receive a digital signal with a first and a second component corresponding to a digital amplitude component and a digital phase component. A digital interpolation filter generates an interpolated first component by interpolating and filtering the first component. A polar modulated radio frequency signal is generated by a combination element as a function of the interpolated first component and the second component.
摘要:
The present disclosure relates to different techniques of generation of a transmission signal, as for example, a transmitting apparatus for transmitting a communication signal and a method for transmitting a communication signal.
摘要:
A phase locked loop has a controlled oscillator for outputting an oscillator signal depending on a control signal. A comparator generates a comparison result from a comparison between a reference frequency signal and a feedback signal derived from the oscillator signal. The phase locked loop also has a filter block for filtering the comparison result and for deriving the control signal from the comparison result, where the filter block has a loop filter and a rejection filter for the frequency-selective attenuation of at least one first interference frequency in the comparison result.
摘要:
Systems and methods are provided for automatically assigning an incoming quantity of goods in response to an event. In one implementation, a system is provided for automatically assigning an incoming quantity of goods in response to an event. The system comprises an inbound interface for interfacing with a plurality of data storage devices in at least one of which the incoming quantity of goods are stored as data and a plurality of sales orders to be confirmed are stored; an execution memory operable to hold a software system, and a processor for coupling to the inbound interface and the execution memory, the processor being operable to execute the software system such that the software system operates to select a subset of sales orders from the plurality of sales to be confirmed according to one or more predetermined criteria and to assign to the subset of sales orders the incoming quantity of goods.
摘要:
Systems and methods are provided for deriving power for an external device from the power source of a fluorescent light. The power source includes a fluorescent ballast electrically connected to the connectors of a light fixture for receiving an input voltage and for converting the input voltage to a lamp voltage suitable for powering a fluorescent lamp. The fluorescent ballast may be modified to include an output line that outputs a voltage for powering the external device to a power port. The power port may be mounted on or near the fluorescent light. Alternatively, the power port may be integrated within a housing that contains one of the connectors of the light fixture. The ballast may be further modified to include an output line for extracting network data and control signals from the power line carrier signals on the input voltage.
摘要:
An arrangement for determining the position of a surgical microscope uses signal transmitters and signal receivers. Light emitting diodes that emit coded light signals and light receptors for receiving the coded light signals are arranged in various locations in space. Reflectors having narrow-bond reflection characteristics are arranged on the microscope so that the light reflected can be identified.
摘要:
The invention is directed to a surgical microscope in which, to determine the distance between the microscope (8, 13) and the object (22), the travel time of a beam of light (57c) emanating from the microscope and reflected by the object is determined. The travel time is determined by phase measurement or by interference matching. In the case of direct phase measurement, modulated light is used. In the case of interference matching, partly coherent light is used. In order to ensure high accuracy over wide measurement range, the two measurement methods are preferably used in combination.