139results about How to "Eliminate signal interference" patented technology

A powerline network system having data relay function includes a plurality of power monitoring zones mutually connected with a powerline network and at least one repeater. Each of the power monitoring zones has at least one power monitoring device. The repeater is connected with each power monitoring device in two adjacent power monitoring zones through powerlines and has a first and a second relay units. The first and second relay units employ two different sets of transmitting and receiving bands to fetch data contained in powerline signals transmitted by each power monitor in adjacent power monitoring zones. The data are received by a relay unit are modulated with different transmitting band and then transmitted to powerlines of another power monitoring zone. The repeaters are not required to be serially connected to the powerlines, and incorrect data read can be also eliminated.

The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated, including highly integrated configurations. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. The oscillators are configured to operate at slightly different repetition rates, such that a difference δf_r in repetition rates is small compared to the values f_r1 and f_r2 of the repetition rates of the oscillators. The CDSL system also includes a non-linear frequency conversion section optically connected to each oscillator. The section includes a non-linear optical element generating a frequency converted spectral output having a spectral bandwidth and a frequency comb comprising harmonics of the oscillator repetition rates. A CDSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.

The invention discloses a multi-user beamforming method and a multi-user beamforming device for a multi-input multi-output (MIMO) system. The method comprises the following steps that: a, a BS acquires the DOA of each user in the MIMO system; b, the BS groups users, namely the users satisfy a predetermined grouping condition are grouped into the same user group; and c, the BS determines a beamforming transmission weight of each user according to the DOAs of the users in each user group, and the data stream of each user is transmitted by an antenna after being multiplied by the beamforming transmission weight thereof. The device is positioned on one side of the BS and comprises a DOA acquisition module, a user grouping module, a data stream processing module and the antenna. The technical scheme of the invention realizes the multi-user beamforming on the basis of null broadening in the MIMO system.

A display panel for display devices which enables precisely determining whether or not adjacent signal lines are shorted or opened and a method for detecting defects of the signal lines are disclosed. The display panel includes a substrate on which a plurality of signal lines to transmit various signals required by pixels is formed, and one of any two adjacent signal lines is connected to at least one of main signal transmission lines and the other one of the two adjacent signal lines is maintained in a floating state.

The disclosed cable adjustment method for giant cable parallel robot cable based on cable length/force comprises: scaling the station coordinate and peak coordinate by measuring apparatus, determining the theoretical attitude angle of feeding cabin; taking cable space shape as the catenary, and solving the theoretical length of cable at every discrete point; detecting the cable tension by sensor, calculating current real length, comparing the real and theoretical lengths to obtain the adjust quantity; finally, sending the adjust quantity into actuator for dragging the feeding cabin. With 2cm/s space scanning speed, this invention introduces position precision less than 3cm, and special fit to giant cable-system parallel robot.

The invention discloses a traditional Chinese medicine Cun-Guan-Chi pulse diagnosis system and relates to the field of traditional Chinese medicine pulse instruments. The diagnosis system comprises a pulse acquisition part, a pressure control part, a communication part and a computer. According to the diagnosis system, individual Cun, Guan and Chi working modules are adopted, cannot interfere mutually and can be used for detecting Cun, Guan and Chi pulse information at the same time, the Cun, Guan and Chi pulse information can be displayed on an upper computer in real time, a plurality of combination modes of force application of Cun, Guan and Chi parts are configured, and all parameters involved in traditional Chinese medicine pulse can be obtained; a detection mode of the diagnosis system is better in line with a traditional Chinese medicine 'sanbujiuhou' pulse diagnosis method than a single-point detection pulse instrument, and effective scientific means is provided for scientific and quantitative research on traditional Chinese medicine pulse diagnosis; the transmission of a serial port is simple and convenient, the equipment using trend of the market at present is met, the property of combination with equipment is good, the convenience is provided for communication with different equipment, and the application range is wide.

A pair of dozer control valves V3, V6 concurrently operable; a pilot pressure valve V14 switchable between an independent position 27 where, when only track devices 5 are operated, discharged fluid from one hydraulic-fluid discharge port P1 is independently supplied to one track control valve and one dozer control valve, and discharged fluid from the other hydraulic-fluid discharge port P2 is independently supplied to the other track control valve and the other dozer control valve, and a merging position 28 where, when the other control valves are operated, discharged fluid from the one hydraulic-fluid discharge port and from the other hydraulic-fluid discharge port are merged and supplied to the control valves V1 to 10; and pressure compensation valves V11 in the control valves and for distributing hydraulic fluid at flow rates based on extent of actuation of the other control valves operated, irrespective of the magnitude of the loads.

Disclosed is a method for removing signal interference in a local radio communication device mounted in a mobile terminal. The method comprises receiving information on a channel in use from the mobile terminal in session; determining based on the received channel information whether a harmonic component of a channel frequency used by the mobile terminal belongs to a frequency band used by the local radio communication device; and assigning a channel in a frequency band with none of the harmonic component among the frequency band used by the local radio communication device as a channel of the local radio communication device, when the harmonic component of the channel frequency used by the mobile terminal belongs to the frequency band used by the local radio communication device.

The invention discloses a resonance transmission rod for connecting a sensor in acoustic emission detection. The resonance transmission rod is arranged on the surface of a metal device to be tested or a measure part metal, is connected with the acoustic emission sensor, and is used for detecting the fracture damage or the internal cracks of the metal device. The resonance transmission rod is characterized in that the transmission rod has a stepped integral structure formed by two metal material cylinders which have a large end and a small end respectively; the large end of the transmission rod is fastened on the metal surface of the device; the acoustic emission sensor is arranged on the small end of the transmission rod; and the dimensions of the diameters and the lengths of the large end and the small end of the stepped metal material cylinders satisfy resonance conditions. The transmission rod can generate resonance and has the energy cohesion and amplitude amplification functions under the action of an acoustic emission frequency. Test research results show that the resonance transmission rod designed according to the above mode has above ten-time amplitude amplification and frequency domain band-pass filtering functions when the resonance transmission rod is applied to the acoustic emission detection.

The invention discloses a human body lower limb motion detection and identification method based on multi-source signals. The human body lower limb motion detection and identification method comprises the following steps of obtaining human body lower limb motion information through a multi-source signal sensing technology detection method, and obtaining a human body lower limb motion state through the human body lower limb motion information; collecting the multi-source signals and carrying out data preprocessing to obtain input signals for identification; dividing the input signals into training data and test data, carrying out training and detection classification identification through an SVM classifier and a BP neural network method based on the SVM, and obtaining an identification result; and performing accuracy rate output optimization on the recognition result to obtain a final recognition result. According to the method, simultaneous acquisition of human lower limb attitude angle signals, plantar pressure signals and surface electromyographic signals of multiple muscles of legs is effectively realized, signal interference is removed, visual data is output to reflect a human lower limb motion state, and more accurate identification and prediction of human lower limb motion are realized.

An attenuation reduction grounding structure of differential-mode signal transmission lines of a flexible circuit board includes a flexible substrate on which at least one pair of differential-mode signal lines, at least one grounding line, a covering insulation layer, and a thin metal foil layer are formed. At least one via hole extends through the thin metal foil layer and the covering insulation layer and corresponds to a conductive contact zone of the grounding line. The via hole is filled with a conductive paste layer to electrically connect the thin metal foil layer to the conductive contact zone of the grounding line to provide an excellent grounding arrangement. The thin metal foil layer includes a plurality of openings formed at locations corresponding to top angles of the differential-mode signal lines.

A method and device for acquiring a precoding matrix are provided by the present invention. The method for acquiring a precoding matrix includes: for each receiving end, selecting the interference vectors as the interference space basis vectors from whole interference vectors, representing the remaining interference vectors as the linear combination of the interference space basis vectors, wherein the remaining interference vectors are the interference vectors in the whole interference vectors of the receiving end except the interference vectors which act as the interference space basis vectors (101); determining the currently used precoding matrix according to the linear combination of the interference space basis vectors represented by the remaining interference vectors of each receiving end and the current channel condition (102). The technical solution of the present invention can eliminate interference and do not generate Bit Error Rate (BER) floor.

The invention relates to a transwell detection device and method based on a terahertz attenuated total reflection technology. The transwell detection device and method can be used for conducting quickunmarked quantitative detection on cells on the lower layer of a transwell experimental cavity. The transwell detection device comprises a terahertz signal generation unit, a total reflection prism detection unit, a terahertz signal receiving unit, a time delay control system and a signal processing unit. The terahertz signal generation unit comprises a femtosecond laser light source, a laser beam splitter, a super-hemisphere Si-lens I and a photoconductive antenna I. The total reflection prism detection unit comprises a transwell cavity and a total reflection prism from top to bottom, a permeability porous thin film is arranged at the bottom of the transwell cavity, a unicellular layer is attached to the position under the porous thin film, and the unicellular layer makes close contact with the total reflection prism. The terahertz signal receiving unit comprises a photoconductive antenna II. The time delay control system comprises a time delay device.

The embodiment of the invention provides an uplink power control method and device for terminal equipment. A directional diagram off-axis angle of a transceiving antenna of a current target satelliteis accurately determined; and a directional diagram off-axis angle of a transmit-receive antenna of the current terminal equipment, an antenna pattern can be combined; the antenna gain is accurately determined, therefore, the transmitting power of the transmitting and receiving antenna when the terminal equipment transmits the uplink message to the target satellite can be determined more accurately; in a communication process of terminal equipment and a target satellite, control of uplink power is completed, the control precision is improved, the signal intensity of the messages sent by the terminal equipment when reaching the target satellite can be accurately controlled, the signal intensity of the messages received by the target satellite can be ensured to be consistent, the near-far effect is avoided, and the communication quality between the terminal equipment and the target satellite can be ensured after signal interference is eliminated.

The invention discloses a temperature drift compensation device and a method for measuring the micro signal. The device comprises a first difference amplifier, a second difference amplifier, a third difference amplifier, an ADC amplification chip and a single chip, wherein the first difference amplifier is to carry out difference calculation of the first micro signal and the second micro signal to get the first difference micro signal. The second difference amplifier is to carry out difference calculation of the third micro signal and the forth micro signal to get the second difference micro signal. The third difference amplifier is to carry out difference calculation of the first micro signal and the second micro signal and to amplify the difference calculation to get the measuring characteristic signal. The ADC amplification chip amplifies the measuring characteristic signal and outputs to single chip. The product of the temperature coefficient of the first differential amplifier and that of the third differential amplifier and the temperature coefficient of the amplifier circuit chip are equal in size and opposite in sign. The temperature drift compensation device and method for measuring micro signal can eliminate the interference of temperature drift produced in measuring circuit to micro signal and improve the measurement accuracy of micro signal.

The invention provides an offline processing method for metal film thickness data in a whole CMP (Chemical Mechanical Planarization) process. The offline processing method comprises the following steps: reading an output signal of an electric eddy sensor, and calculating a sampling signal according to the output signal; setting an amplitude threshold value of the sampling signal; traversing all sampling signals to obtain all non-zero point signal sections according to the amplitude threshold value; calculating the signal width of each non-zero point signal section, and determining a width threshold value of the sampling signals according to the signal width; traversing all non-zero signal sections in a measurement process again according to the amplitude threshold value and the width threshold value, extracting an effective measurement signal section, and calculating an average value of all data points in a central interval of each effective measurement signal section; acquiring the change information of metal film thickness in the whole CMP process according to the average value. According to the offline processing method, the influence of an interference signal and part abnormal signals in the measurement process can be effectively eliminated; a real copper layer thickness change can be calculated concisely and effectively; moreover, the calculation result accuracy is high.

The invention relates to a multi-signal intelligent collection terminal which comprises a circuit unit and a casing body, wherein the circuit unit is placed in the casing body. The circuit unit comprises a collection module, a core processing module, a transmission module, a debugging module and a power supply module. The collection module, the core processing module and the transmission module are electrically connected in turn. The debugging module is electrically connected with the core processing module. The output end of the power supply module is connected with the power supply input ends of the collection module, the core processing module, the debugging module and the transmission module, and powers the collection module, the core processing module, the debugging module and the transmission module. The casing body is provided with a collection module interface which is connected with the collection module, a transmission module interface which is connected with the transmission module, and a power supply port which is connected with the power supply module. According to the invention, a collection and transmission integrated structure is used to intelligently collect various signals of a measured object; a hardware circuit is effectively simplified; the failure rate is reduced; the reliability of the collection terminal is improved; and the collection module has high anti-interference ability, which is conductive to improving the measurement accuracy of the collection terminal.

A remote control comprises a plurality of control buttons, an optical ginger mouse and a transmission interface. The control buttons are used for triggering control signals. The optical ginger mouse is used for detecting physiological features and displacement. The transmission interface is used for outputting the control signals, the physiological feature and the displacement to a display device. The invention further provides a display system.

The invention discloses an engine ignition capacitor aging test fault detection device, and aims to provide an automatic detection device which is accurate in fault judgment and capable of eliminating interference. The engine ignition capacitor aging test fault detection device is implemented according to the following technical scheme: a main ignition device circuit is connected to tested ignition capacitors through a sampling circuit, the sampling circuit is electrically connected to a signal and data processing control module through a channel isolation and processing control circuit, the main ignition device circuit, a parameter setting circuit, an operating mode setting circuit, a self-checking circuit, a buzzer, a power supply module and an indicating circuit are electrically connected by taking the signal and data processing control module as a core, the sampling circuit sends isolation signals to the signal and data processing control circuit through the channel isolation and processing control circuit so as to perform peak detection on each path of current, current peak data comparison is set correspondingly, fault judgment is performed after current peak data comparison, the signal and data processing control circuit cuts off a detection power supply when a sampled peak of any path exceeds a correspondingly set peak error range, and an alarm sound is given out through the buzzer.