193results about How to "Eliminate disturbing effects" patented technology

A device for setting the torque transmitted by a friction clutch (12), having an actuator chain which comprises an electric motor (45), a step-down gear (42) and a mechanism for converting the rotational movement into a displacement of a pressure plate (29) of the clutch (12), so as to enable the torque which is transmitted to be set precisely and rapidly even given high friction. For this purpose, the electric motor (45) and / or step-down gear (42) is / are affected by friction, the conversion mechanism (31, 32, 35, 36, 40) and / or the friction clutch (12) itself is / are affected by elasticity, and, to set the torque (Md) of the friction clutch (12), a position regulator (47) which is operatively connected to the electric motor (45) and a sensor (46; 46′) which determines the position of one of the links of the actuator chain (45, 42, 41, 40, 36, 35, 32, 31, 29) are provided, the sensor being present at a location upstream of a substantial part of the elasticity in the force-flow direction. The corresponding control and calibrating method is also developed.

A cosite interference cancellation system is provided for improved rejection of a signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. The cosite interference cancellation system and associated method advantageously provide improved signal rejection by continuously controlling (adjusting) a matching time delay to reduce cosite interference.

The invention relates to a positioning method and a positioning system for a long-distance pipeline defect. In the method for locating defects of long-distance pipelines according to the present invention, a series of butt girth welds are formed in the long-distance pipelines during installation, and wheel-type odometers are used for mileage measurement and positioning in long-distance pipelines. When the wheel-type mileage While the meter is advancing and measuring the mileage in the long-distance pipeline, the eddy current testing device is used to detect when the butt girth weld has passed. This information is analyzed simultaneously with the mileage data of the wheel odometer to determine the pipeline defect s position. The long-distance pipeline defect location system of the present invention includes a wheel odometer and an eddy current detection device; the eddy current detection device includes an eddy current coil and an eddy current detection processing module connected with the eddy current coil. The positioning method and system of the invention can avoid the increase of the accumulative distance error of the wheel odometer, improve the positioning accuracy, and fully meet the positioning requirements.

A reliable and secure activation of an access based on a detection of movement in a remote access system by providing a secure method for opening / closing of an access in hands-free access mode. The detection of movement relates to the displacement of a lower member of a user by a remote access system, this access system including at least two elements of detection which each emit a signal whose variations (31, 33, 35) are analyzed. The detection of a movement of a lower member is validated by the application of a double verification step according to parameters (dAsA, dAsB) of a criterion for identification (tA, tB; dAsA, dAsB) of a form of variation (F2; A, B) of each signal (31, 33, 35) with a model form of the movement, and according to a criterion for simultaneity of detection of the forms of variation (F2) identified on the two signals.

The present invention recognises and eliminates from a biomagnetic measurement signal interferences whose source is disposed in the direct vicinity of an object being measured. The invention utilises the SSS method that can be used to separate from one another the signals associated with the internal and external sources of a set of measurement sensors by calculating two series developments. The sources to be examined in the invention and disposed in the so-called intermediate space produce a component to both of the developments, and can, therefore, be detected by means of an analysis to be performed in a time domain. This division into components can be made using the Principal Component Analysis (PCA), the Independent Component Analysis (ICA) or the Singular Value Decomposition. Finally, the clarified interferences in the intermediate space can be eliminated from the measured signal using, for example, the linear algebraic orthogonal projection.

The invention relates to a differential mechanism sub-assembly for a vehicle driving axle assembly, bolts in a main reducing gear assembly, and a fastening device of a nut type fastener. In order to finish the automatic tightening operations on the differential mechanism sub-assembly, the bolts in the main reducing gear assembly and a nut, the invention provides a universal fastener automatic control tightening device used in the assembling process of the driving axle assembly. The tightening device comprises a horizontal rotary operating board which is driven to ascend and descend by a lifting mechanism and is provided with a servo tightening mechanism, a tightening operating head, and a counter torque balance positioning head which keeps certain adjustable center distance with the servo tightening mechanism; and a driver of the servo tightening mechanism is connected with a communication interface of an electronic control unit. The technical proposal eliminates personal factors and the disturbing influence under the action of the counter torque in the assembly process to the utmost extent so as to ensure that the product technical requirement is used as a standard to improve the operation quality for the assembling production of the driving axle assembly and improve the operational efficiency.

A method for sensor operating-state determination of a valve arrangement to control a process medium flow through a pipeline having a valve element, arranged such that it can move axially within a valve housing via a pneumatic actuating drive by application of control pressure, with the control pressure being measured and evaluated in order to determine the sliding friction during the movement. The valve element can be moved at a constant speed over at least a subarea of the travel movement, the value of which speed is measured via a position sensor system for signal processing, with the currently applied control pressure being measured at approximately the same time for signal processing via a pressure sensor system. The current sliding friction of the valve element can be determined as a measure of wear state from both measured values, by an electronic evaluation unit, based on a proportional drive force expressed by the control pressure which occurs when the valve element is traveling at a constant speed.

The invention discloses an algae bloom prediction method based on principal component analysis and a BP neural network, and belongs to the technical field of water environment management. The method comprises the steps of monitoring data randomness preprocessing; carrying out influence factor analysis based on a principal component analysis method; and constructing a prediction model by taking thechlorophyll a content and the chlorophyll a content change rate of the water body as output parameters and analyzing the prediction precision. The method is characterized in that an integral derivation data smoothing method is adopted, so that the influence of data randomness is eliminated; based on a principal component analysis method, prediction model input factors are simplified, chlorophylla content change rate is taken as an output parameter, and the defect that chlorophyll a content fluctuation interferes with a prediction result is eliminated, so that the prediction precision of thealgae bloom is effectively improved.

The present invention relates to a method for determining a deviation from zero (Hx0, Hy0) of an electronic compass, comprising the steps of determining first magnetic field strengths in a first coordinate system of the electronic compass by means of a three-axis magnetic sensor; calculating inclination-compensated second magnetic field strengths (200) in a second coordinate system (x, y) which is parallel to the surface of the Earth based on the first magnetic field strengths for adjusting an approach function (210) to the inclination-compensated second magnetic field strengths (200); and determining a deviation from zero (Hx0, Hy0) from the adjusted approach function (210). A method for operating the electronic compass comprises steps for calculating an inclination-compensated magnetic field strength (Hx, Hy) in the second coordinate system (x, y) based on a first magnetic field strength measured by the magnetic sensor, for calculating a zero-point corrected third magnetic field strength (Bx, By) by subtracting the deviation from zero (Hx0, Hy0), determined by the aforementioned method, from the inclination-compensated second magnetic field strength (Hx, Hy), and for calculating an azimuth angle by which an axis (x) of the second coordinate system (x, y) deviates in relation to a north-south direction.

The invention discloses a visible light communication receiving method based on a neural network. The method comprises the following steps: 1, a first programmable gate array converts a video signal sent by a signal source into a digital signal; 2, the digital signal drives an LED lamp to emit a light signal via an LED driving circuit; 3, the light signal goes into a receiving subsystem via n photoelectric detectors; 4, the n data streams are transmitted to a trained neuron combination module; and 5, the neuron combination module performs balancing processing on the n data streams and outputs a combined data stream that is demodulated and converted into a video signal by a second programmable gate array. The invention also discloses a visible light communication receiving system for realizing the visible light communication receiving method based on the neural network; the system comprises a transmission subsystem, a transmission subsystem and the receiving subsystem. The visible light communication receiving method has the advantages of favorable application prospect and the like.

A clarifier is provided with an improved inlet structure which receives influent from influent column ports and discharges the influent uniformly around the entire circumference of the inlet structure. The influent column ports may be baffled. Angled guide vanes on the inlet structure reduce the flow energy and effect a tangential flow into a feedwell in the basin. The feedwell may be conical to further reduce the velocities and create an outward flow to counteract inward flows in the basin.

The invention discloses a magnetic suspension control moment gyro device. The magnetic suspension control moment gyro device is formed by a flywheel system and a frame system. The flywheel system is formed by fly hammers, radial magnetic suspension bearings, radial position sensors, axial driven magnetic suspension bearings, motors, a protective bearing, a sealing shell, an axle seat and the like. The protective bearing is located in the middle of a flywheel, the sealing shell and the axel seat are located on the two sides of the flywheel, and the fly hammers, the radial magnetic suspension bearings, the radial position sensors, the axial driven magnetic suspension bearings and the motors are sequentially arranged on the upper side and the lower side of the protective bearing from inside to outside. The frame system is formed by a support, a rotary disc, a torque motor, a bearing, a sleeve, a lock nut, a conductive slip ring, a photoelectric encoder, an end cap and a base. In the frame system, the support is connected with the axel seat and the rotary disc, the conductive slip ring is located in the middle of the rotary disc, and the sleeve, the bearing, the locking nut, the photoelectric encoder and the end cap are outwards located on the rotary disc. According to the magnetic suspension control moment gyro device, the axial driven magnetic suspension bearings and the photoelectric encoder are adopted, the size, the weight and vibration are reduced, control precision is improved, and the response speed is increased.