165results about How to "Improve measurement quality" patented technology

A multi-hop wireless, for example cellular, communications system is provided comprising a source equipment which may be one of a base station or an end user terminal for transmitting signals towards a destination equipment which may be the other of a base station or an end user terminal via at least one relay equipment. The relay equipment receives a plurality of signals transmitted from one or more source equipments of the system and from this plurality of signals selects a signal to relay. In this way the decision about which relays are included in which communication paths in the system is distributed to the relay equipments of the system, thus reducing the signalling overhead as compared with link state protocols which are typically used for routing in such multi-hop systems.

A wind energy installation, monitoring device, and method. An exemplary wind energy installation includes a rotor including at least one blade and a generator configured to be driven by the rotor to produce electrical energy. The installation also includes a pitch device configured to vary the at least one blade of the rotor. The pitch device includes a power supply unit with a battery, an actuating drive, a monitoring unit, and a load module configured to switch the actuating drive between an operating mode and a test mode. In the test mode, the actuating drive forms a preselectable defined load for the battery. Accordingly, a high and reproducible load not dependent upon environmental conditions may be applied to conduct a stress test, even during ongoing operation.

A monitoring apparatus comprising a multichannel pressure sensing sensor for measuring a ballistocardiographic signal of a human body is disclosed. The monitoring apparatus also comprises means for selecting a time window for heart inter beat interval including two consecutive heart beats to be estimated, defining a spectrum for the ballistocardiographic signal averaging between at least two measurement channels of the multichannel pressure sensing sensor, a cepstrum from the logarithm of a spectrum, and a heart inter beat interval. The invention relates to a method for defining a heart inter beat interval, where a ballistocardiographic signal of a body is measured with a multichannel pressure sensing sensor, a time window for heart inter beat interval Including two consecutive heart beats to be estimated is selected, a spectrum for the ballistocardiographic signal averaging between at least two measurement channels of the multichannel pressure sensing sensor, a cepstrum from the logarithm of a spectrum, and a heart inter beat interval are defined.

The invention relates to a machining head for a laser machining device, which is equipped for machining a workpiece (24) using laser radiation (30). The laser machining head comprises an adjustable focusing optical unit (34), which focuses the laser radiation (30) in a focal spot (22). The distance between the focal spot (22) and a machining head can be modified by modifying the focal length of the focusing optical unit (34). A scanning apparatus (44) deflects the laser radiation (30) in different directions. An optical coherence tomography device (48) measures a distance between the treatment head and the workpiece (24). Here, measuring light (52), which was generated by a measuring light source (50) and reflected by the workpiece (24), interferes in the coherence tomography device (48) with measuring light, which traveled an optical path length in a reference arm (60). A path-length modulator (74) is disposed in the reference arm (60) and it updates the optical path length in the reference arm (60) synchronously with, and dependent on, a change in the focal length of the focusing optical unit (34).

The invention relates to a hemispherical resonant gyro fully differential control system and control method based on time division multiplexing. The control system comprises an electrode driving detection time division switching module, a sensing signal amplitude-phase demodulation module, an error parameter identification module, a working mode switching module, a control parameter calculation module, a time sequence period calculation module, a mode switching calculation module, a driving signal modulation synthesis module and a measurement output module. The sensing signal amplitude-phase demodulation module and the error parameter identification module form an error signal resolving module. The control parameter calculation module, the time sequence period calculation module and the mode switching calculation module form a data calculation unit. By means of time-sharing switching and two-rotation sensing mode difference of driving detection electrodes, gyro output error terms can be counteracted and inhibited, and the control precision of each control loop and stability of the performance of a hemispherical resonant gyro can be guaranteed.

The invention relates to a device for the contactless flow measurement of fluids in flexible tubes.

The invention discloses a combined type device and a method for precisely and dynamically measuring spatial position and posture. The device comprises an inertia measuring unit and a total station measuring unit which are connected with a data acquisition and processing unit respectively; and the data acquisition and processing unit is connected with a computer. The inertia measuring unit measures the acceleration and the angular velocity of a target solid conjugant; a total station measures and calculates the position and the posture of the target solid conjugant; the acceleration, the angular velocity and the position and the posture are sent to the computer through the data acquisition and processing unit; according to data arrival time, measurement time delay and an inertia measurement solution principle of the total station, the computer adopts a time backtracking algorithm and KALMAN wave filtering, merges and processes two kinds of data, removes the measurement time delay of the total station and resolves out the optimally-estimated position and the posture of the target solid conjugant. The combined type device and the method improves the stability and the real-time position and posture measuring precision of the prior total station measuring system, enriches the measuring output information of the prior dynamic tracking measurement system and meets the real-time measuring requirement of high precision, high sampling rate and long-time operation of a large-scale device on large-dimension space.

A collision severity estimation system (10) for an automotive vehicle (12) is provided. The system (10) includes one or more object detection sensors (22) detecting an object and generating a first object detection signal. A controller (20) is electrically coupled to the object detection sensors (22) and determines motion properties of the object relative to the vehicle (12) and generates an object motion signal in response to the first object detection signal. The controller (20) determines potential collision severity between the vehicle (12) and the object in response to the object motion signal and generates a collision severity signal. Methods of determining motion properties of the object as well as determining potential collision severity between the vehicle (12) and the object are also provided.

A method for determining an item of control information for displaying a driving condition of a vehicle with the aid of a display unit includes: an ascertainment of the safe driving condition of the vehicle, in which no risk of a collision with an object exists; an ascertainment of a prevailing driving condition of the vehicle in relation to the safe driving condition is carried out; a determination of the item of control information for activating the display unit based on the safe driving condition and the prevailing driving condition, the item of control information causing a display of an item of information about the prevailing driving condition in relation to an item of information about the safe driving condition by the display unit.

A method for determining the contributions of individual sound transmission paths to the operation-dependent total noise of a sound transmitting structure includes the following steps:

• • applying at least one acceleration sensor and/or source microphone in the area of each sound input position;
  • applying at least one target microphone and/or acceleration sensor in the area of a receiving position;
  • carrying out at least one simultaneous measurement of sound pressure and/or acceleration at the receiving position and of acceleration and/or sound pressure at each sound input position during operation;
  • determining at least one acceleration-to-pressure and/or acceleration-to-acceleration sensitivity function and/or at least one pressure-to-pressure sensitivity function;
  • determining reciprocally measured frequency response functions between each sound input position and each receiving position;
  • determining the inertances in the operational state for at least one sound input position;
  • determining of at least one force at at least one sound input position based on the computed inertances and the accelerations measured during operation at the sound input positions; and
  • determining the contributions of the individual transmission paths.

A sensor for a contactless electrocardiographic measurement on a person includes a carrier for fastening the sensor on an object, such as a vehicle seat, and at least one electrically flat electrode mounted to the carrier by an elastic element. An inflatable bellows is disposed between the carrier and the electrode, inflation of the bellows deflecting the elastic element and increasing a distance between the electrode and the carrier to thereby urge the electrode toward a person seated on the seat.

Device for equipment of a cell (1) comprising an electrolytic bath (4) covered with a crust (5), with a chisel (13) that can be moved vertically between a high position in which it is above the crust (5) and a low position in which the crust (5) is perforated and in which contact is made with the bath (4), the device (11) comprising means of detecting electrical contact between the chisel (13) and the bath (4), these means comprising an electrical circuit (19) capable of making an electrical measurement between the chisel (13) and a point (20) in the cell used as an electrical reference, and taking immediate action on the actuator to cause vertical upwards displacement of the chisel when a predetermined value of an electrical measurement is reached. The electrical circuit (19) is connected to the chisel (13), to the rod (14) of the chisel (13) or to the actuator rod (17) through connecting means capable of creating a point contact (24) at least one point between the circuit (19) and the chisel (13), the rod (14) of the chisel (13) or the actuator rod, these connecting means (23) being acted upon by elastic means (25) pushing them towards the chisel (13), the rod (14) of the chisel (13) or the actuator rod (17) respectively.

The invention discloses a method and system for conducting unilateral measurement on orbit control net pile points. The method comprises the steps that height differences, measured by all free measuring stations, of adjacent pile points of an orbit control net on a unilateral line are recorded; a trigonometric leveling network is built in the mode that a three-side level closed ring is built through every three adjacent pile points; for each closed ring of the trigonometric leveling network, three-side level difference closure error counting is conducted according to the level difference amongthe three adjacent pile points of the closed ring; whether the level measurement result on the unilateral line is qualified or not is judged according to the three-side level difference closure errorcounting result. Accordingly, unilateral measurement can be conducted on upstream or downstream CPIII points of the line, and operation and maintenance of a rail section of a V-shaped skylight duringrailway operation are facilitated.

A device for optical characterization of a sample is provided, the sample being accommodated in a receptacle container transparent to light. The device includes a camera, using which the sample may be detected, and a first light source is situated in such a way that the sample is transilluminated opposite to the viewing direction of the camera, a second light source is situated on the same side as the camera, and a laser source is situated transversely to the viewing direction of the camera.

The invention discloses an interferometer with two-path output and double corner reflectors, which comprises a beam splitter, two fixed planar speculums, and two scanning corner reflectors that are fixed back to back by a rigid structure and taken as an individual moving part; the first planar speculum and the second planar speculum are symmetric with respect to a half reflecting plane of the beam splitter, and the two planar speculums form an included angle of 22.5 degrees with the half reflecting plane of the beam splitter; the double corner reflectors move repeatedly and straightly along the normal line direction of the half reflecting plane of the beam splitter; the optical path difference is 4 times of the displacement of the double corner reflectors. The interferometer generates light beams that are output in two paths and received by two detectors; the two-path signals of the detectors have same amplitudes and opposite phases, and the phase difference forms an interference pattern. The interferometer eliminates the strength distortion that is most important in Fourier transformation spectrum and caused by the nonlinearity of the detectors, absolutely eliminates the leaning and swaying problems, and is applicable to Fourier transform spectrometers with high distinguishability in various spectrum regions.

The invention relates to a magnetic field unit (1) of an MRI system (18) for image capturing a head region as the region to be recorded, comprising at least one permanent magnet (2) for generating a main magnetic field, a device (3) for generating a gradient field, and at least one coil (4) for generating and receiving radio frequencies. The magnetic field unit (1) is fastened to a mounting (19) such that a longitudinal axis (A) of the magnetic field unit (1), together with a vertically extending axis, forms an angle of no more than +45° and that the magnetic field unit (1) and the patient (P) can be adjusted relative to each other such that the magnetic field unit (1) can be moved to a position surrounding the head of the patient (P).

In a method and magnetic resonance apparatus for the hyperintense display of areas containing particles of magnetically active substances, in an examination region in a measurement volume of a magnetic resonance scanner, measurement data from the examination area are generated by a pulse sequence and recorded, the pulse sequence causing an echo time of less than one millisecond, so that a suppression of undesired signals is also caused.

A high-resolution in situ sensing system and method for providing continuous measurements of at least one dissolved analyte including a sample processing cell having at least a first conduit defining a first passage with at least one selectively-permeable wall capable of passing a portion of the sample liquid into a processing, fluid. The at least one selectively-permeable wall substantially resists flow of another portion of the sample liquid therethrough. Processing fluid is directed through the first conduit while moving the sample liquid and the reagent fluid relative to each other in one of a stationary, concurrent or a countercurrent flow relationship to achieve either partial or full equilibration between the sample liquid and processing fluid to generate at least partially equilibrated reagent fluid and a processed sample in a substantially continuous manner.