127results about How to "Avoid interfering signals" patented technology

Embodiments of the invention relate to cellular wireless networks and are particularly suited to networks including different types of base stations. So-called femtocell types of base stations are typically deployed within a subscriber's premises and operate at low transmit power, providing a very limited area of wireless coverage. A femtocell is typically deployed within the area of wireless coverage of a conventional macrocell, occupying the same frequency spectrum and timeslots as the macrocell. A problem can be presented to a user equipment terminal that is close to the femtocell but unable to gain access to it, because the transmissions from the femtocell may appear as interference to the user equipment terminal, preventing it from accessing the macrocell which it could otherwise access. A cellular wireless network according to an embodiment of the invention employs a method of allocating radio resource to femtocells so that the transmissions from femtocells do not occupy the same radio resource blocks as those used by the macrocell for signalling; embodiments of the invention thereby prevent interference associated with signalling to cause a connection to be lost, or prevent a connection being set up.

The invention provides a technology for manufacturing a higher performance and higher reliability semiconductor device at low cost and with high yield. The semiconductor device of the invention has a first conductive layer over a first insulating layer; a second insulating layer over the first conductive layer, which includes an opening extending to the first conductive layer; and a signal wiring layer for electrically connecting an integrated circuit portion to an antenna and a second conductive layer adjacent to the signal wiring layer, which are formed over the second insulating layer. The second conductive layer is in contact with the first conductive layer through the opening, and the first conductive layer overlaps the signal wiring layer with the second insulating layer interposed therebetween.

Systems and methods for avoiding interference signals sent by a femto node in a wireless communication system are described herein. In one embodiment, the method comprises establishing a communication link between a first transceiver and a base station. The base station is configured to provide wireless communication coverage within a first area. The method further comprises detecting by the first transceiver a femto signal generated by the femto node. The femto node is configured to provide wireless communication coverage within a second area to at least a second transceiver. The second transceiver is different from the first transceiver. The second area is smaller than the first area. The method further comprises identifying information indicative of a signal strength of the femto signal. The method further comprises transmitting a first message in response to detecting the femto signal, the first message comprising information identifying the femto node and the information indicative of the signal strength of the femto signal to the base station over a first frequency carrier. The method further comprises receiving a second message from the base station. The second message comprises information indicative of an instruction to communicate over a second carrier frequency. The method further comprises communicating with the base station over a second frequency carrier in response to the second message.

An image building module includes an image builder, a signal-shielding flexible film, and a signal shielding cover. The image builder includes a first image capturing element and a processing chip. The first image capturing element is used for capturing a first image. The processing chip is used for processing the first image. The signal-shielding flexible film covers the processing chip. The signal shielding cover covers the image builder and the signal-shielding flexible film. The signal shielding cover has a first through hole exposing the first image capturing element.

The invention discloses a narrow-band electromagnetic wave signal coupling method and detecting system for measuring GIS partial discharge. The narrow-band electromagnetic wave signal coupling method includes the following steps that (1) the cut-off frequency fc, radiated by a poured hole in a metal ring of GIS equipment, of an electromagnetic dominant mode is calculated; (2) the cut-off frequency fc is used as the central frequency of the detecting system, and the detecting system is mainly formed by sequentially connecting a narrow-band antenna, a filter, an amplifier and a signal collector in a communicating mode; (3) the narrow-band antenna is arranged directly facing the poured hole; (4) the narrow-band antenna enables electromagnetic wave signals radiated by the poured hole to be converted into voltage signals to be transmitted to the filter, the filter conducts filtering on the voltage signals, and the voltage signals are received by the signal collector to be recoded and analyzed being amplified by the amplifier. According to the narrow-band electromagnetic wave signal coupling method, the gain within the effective narrow-band range is far higher than that of an existing broad-band detecting method. Moreover, interference signals within the broad frequency band range are avoided, and the signal to noise ratio is greatly improved. The requirements for on-site tests are completely met.

An apparatus for making a plurality of terminals have a random access to the reverse common channel system in CDMA, comprises code synchronization detection information broadcast means provided in the base station for broadcasting the state information of a channel card in real time for the terminals to recognize the code synchronization detection when the code synchronization of a certain data is acquired through performing the code synchronization of the preambles transmitted from the terminals through the reverse common channel, and data transmission determination, means provided in the terminals for making the terminals to have attempted data transmission in the same time slot with the data of the code synchronization detection continuously transmit data and the other terminals stop data transmission.

A coupling apparatus for facilitating communications of data signals over a low voltage electric power network is provided. In one embodiment, the apparatus includes a mains terminal configured to be connected to a low voltage electric power network carrying alternating current (AC) power and an appliance terminal configured to receive a male electric plug. The two terminals may be housed in a housing and connected via one or more inductive elements that attenuate high frequencies while allowing the AC power to pass through substantially unimpeded. Thus, interference caused by an appliance connected to the appliance terminal is filtered to prevent such interference from being conducted onto the low voltage electric power network. The apparatus also may include a third terminal that in some embodiments is electrically connected to the mains terminal to thereby output the data signals and AC power. In other embodiments, a modem may connect the third terminal to the mains terminal in which case the third terminal may communicate demodulated data to a communication device without outputting the AC power.

A OFDM-CDMA communication system that generates a plurality of subcarrier components by multiplying each of a plurality of transmission symbols by a channelization code whose length is N according to a spreading factor, and transmits those subcarrier components by a plurality of different subcarriers, measures the propagation environment of each subcarrier, divides the subcarriers into groups having N number of subcarriers in each group whose propagation environments are close one another, and transmits the N number of subcarrier components, which have been multiplied by the channelization code, by subcarriers of the same group.

The invention relates to an intelligent fire alarm system comprising a detection sensor module, an image/video module, a node module which is used for receiving alarm information of the detection sensor module and the image/video module and uploading the alarm information to a control module, and the control module which is used for controlling an alarm device and/or fire-extinguishing equipment to work. According to the system, flame signals can be accurately identified by adopting red and purple composite flame sensor and a smoke sensor and alarm signals are emitted; the image/video module is adopted to perform high-definition video recording/photographing of the onsite situation, and remote monitoring equipment is supported to view the uploaded high-definition videos and photos in real time; and a GSM module is adopted so that an alarm short message or an alarm call can be directly sent and initiated to a user terminal, and the onsite frames and photos can be transmitted in real time.

This invention relates to a supply turn-on reset circuit including a regulation circuit, a charge/discharge unit and an output circuit, in which, the regulation circuit receives and regulates time pulse signals to output control signals and the lowest quasi-bit of the control signal is limited above the pre-designed one, the charge/discharge unit with the capacity device receives the control signal to decide if it charges/discharges to the capacitor according to the control signal and outputs the storage voltage of the capacitor to be received by the output circuit outputting the reset signals, in which, the regulation circuit regulates the wave and the lowest quasi-bit of the regulation control signal to decide the duty cycle ratio driving the unit to charge/discharge and the output circuit decides if to start or stop the reset signal based on that if the storage voltage reaches to the critical voltage of the output circuit.

Provided is a method and apparatus for calculating an isolation distance that is a distance where an interference phenomenon does not occur between wireless repeater apparatuses. The isolation distance calculating apparatus may include: an interference signal calculator to calculate a magnitude of an interference signal included in a particular band by detecting a signal of the particular band extracted from a received radio signal of a wireless repeater apparatus; and an isolation distance calculator to calculate a necessary isolation distance for cancelling interference between the wireless repeater apparatus and another wireless repeater apparatus, based on a predetermined allowable interference signal level and the magnitude of the interference signal.

The invention relates to a device to detect individual moving objects having very small dimensions. The device according to the invention comprises a photo electric sensor having at least one light beam transmitter and one light beam receiver, the objects that are to be measured moving through the optical path of the photo electric sensor, a first bundle of optical waveguides whose inputs are connected to the light beam transmitter and whose outputs are arranged in a row alongside each other, the light beams emitted by the outputs forming the optical path of the photo electric sensor, a second bundle of optical waveguides which are arranged in a row alongside each other whose inputs pick up the light beams emitted by the first bundle of optical waveguides and whose outputs are connected to the light beam receiver, and an evaluation unit which is coupled to the light beam transmitter and the light beam receiver and which registers a change in the received light intensity of the photo electric sensor produced by the objects passing through the optical path.

The invention discloses a metal oxide lightning arrester MOA online monitoring method. Parameters reflecting MOA aging in a model are solved by fitting and approximation of a leakage current calculated value in the equivalent model to an actual leakage current measured value via utilizing a genetic algorithm so that the aging situation is accurately monitored. Influence of harmonic voltage and frequency fluctuation on MOA online monitoring accuracy in power grid voltage is overcome by the method, and the MOA aging situation can be more accurately monitored without performing complex FFT computation on leakage current to overcome interference signals in current signals so that the MOA aging monitoring effect is effectively enhanced. The method is simple in circuit design, stable in working performance and high in anti-interference capability so that a wireless transmission method is quite easy to change, and thus MOA aging long-distance online monitoring is realized.

The aim of the invention is to reduce the logistical and assembly expenses during the connection of electrical machines. To this end, a connection device is provided with a base body (7) that can be mounted in a terminal box socket (1) of the electrical machine. A plurality of contacts (6) of the electrical machine can be plugged or clipped into said base body (7). Outer contacts can be connected to the base body (7) by means of connection elements (4). Preferably, the connection elements (4) are collected together by a plug housing base body (8) in such a way that a plug-in system is provided by means of the socket base body (7).

The present invention relates to a post arc current measurement method without ground interference and with high precision based on current transfer characteristics and magnetic blowout. With the current transfer characteristics as a basis, with magnetic field arc blow as auxiliary, the isolation measurement of a measurement circuit and a main circuit is realized, and a ground interference signal is effectively avoided. At the same time, through transfer branch resistance parameter design and a magnetic blowout effect, the current of a resistance branch can be effectively controlled, thus a vacuum switch is switched off after a main current peak, and thus the control precision requirement of the vacuum switch is low. The method has the advantages of high measurement precision, less interference, and high reliability. In addition, through optical fiber isolation control and data communication, the on-line measurement of the post arc current of a power system can be satisfied.

A locator for determining the depth of a buried electromagnetic marker includes a transmission antenna and two reception antennas. The locator has a major axis and is configured. The transmission antenna is configured to generate an oscillatory magnetic field parallel to the major axis. The first reception antenna of the two reception antennas is configured to couple with an oscillatory magnetic field parallel to the major axis emitted by the electromagnetic marker and to generate a first detected signal. The second reception antenna is displaced along the major axis from the first antenna and configured to couple with an oscillatory magnetic field parallel to the major axis emitted by the electromagnetic marker and to generate a second detected signal. The locator includes analogue to digital converters and a processor which is configured to calculate the depth of the electromagnetic marker.

The invention relates to a seismic SH wave three-dimensional exploration earthquake source device which comprises a stepping motor, a servo controller group, a transmission shaft and an earthquake-exciting box body. The stepping motor carries an encoder itself; the encoder is electrically connected with the servo controller group through a connecting line; the shaft center of the output shaft of the motor is connected with the transmission shaft through a bearing; the transmission shaft is equipped with fan blades; the fan blades are connected with the outer disc of the earthquake-exciting box body; the earthquake-exciting box body takes the motor shaft center as a center shaft and is provided with an upper cover, an inner disc and the outer disc, wherein the upper cover is connected with the outer disc, and the bottom portions of the inner disc and outer disc are welded with spike teeth; the motor shaft center passes through the center of the inner disc; the tail end of the shaft center is welded to a bottom cone; the inner disc bottom cone and the spike teeth enable the device to be fixedly arranged on the ground; the motor drives the fan blades through the transmission shaft, and the fan blades drive the outer disc to rotate around the inner disc; and the rotation of the outer disc enables the spike teeth on the bottom portion of the outer disc to generate tangential vibration with the ground, thereby generating SH waves at various directions. The device is concise in structure, portable, convenient to transport, and adjustable in power, and can provide enough seismic exploration energy and meet various geology field exploration, such as engineering investigation and metal mine exploration and the like.

The invention discloses a sleep quality monitoring device and method. The sleep quality monitoring device comprises a bag and a host; the bag is used for obtaining sleeping data of a user and sending the sleeping data to the host; the host is connected with the bag and used for receiving the sleeping data, processing the sleeping data and sending processed sleeping data to a server to enable the sleeping state of the user to be analyzed according to the processed sleeping data through the server. According to the sleep quality monitoring device and method, the monitoring on the sleeping state of the user is intelligently implemented under the condition that the sleeping comfort of the user is not affected, interference signals are effectively avoided, the reliable sleeping data are provided for the user to enable the user to timely understand the quality condition of the self-sleeping, and the accurate basis is provided for the improvement of the sleeping quality of the user.

The invention provides a transmission shaft monitoring device. The transmission shaft monitoring device comprises an electromagnetic induction signal generation device and a control system; the electromagnetic induction signal generation device is used for detecting a voltage change signal generated by the rotation of a transmission shaft; the control system is used for analyzing and judging the voltage change signal input by the electromagnetic induction signal generation device. The electromagnetic induction signal generation device comprises a magnetic pole pair, a coil, metal rings, electric brushes and a voltage sensor; the magnetic pole pair is used for generating a magnetic field on a transmission shaft end; the coil is fixed on the end face of the transmission shaft and used for cutting magnetic force lines; the two metal rings are arranged at the shaft ends of the transmission shaft and not in contact with each other; the two ends of the coil are connected with the two metal rings respectively; the two electric brushes are in contact with the two metal rings respectively, and the two electric brushes and the voltage sensor form a closed circuit. The transmission shaft monitoring device can analyze the voltage amplitude and cycle which are output by the voltage sensor and monitor whether or not the state of the transmission shaft meets the design requirement.

A method for data interleaving and data de-interleaving against periodical position interference, the process of data interleaving includes: multiplexing data of different transport channels, interleaving the data multiplexed, and Outputting the data interleaved; the process of data de-interleaving includes: receiving the data interleaved, de-interleaving the data received, and de-multiplexing the data de-interleaved into different transport channels; performing a randomized operation in the process of the data interleaving and an inverse operation of the randomized calculation in the process of the data de-interleaving to make the outputted position of the data of different transport channels after the interleaving be random. It may be avoided by applying the present invention that all synchronization interference signals in a wireless channel are concentrated in the data of the same transport channel.

The invention relates to a device for automatically detecting remainders in an aerospace engine, and belongs to the technical field of detecting the remainders in the aerospace engine. The device aims to solve the problem of low detecting efficiency in the traditional remainder detecting method during swinging or swaying in the aerospace engine. A detecting device which is arranged on a turn table comprises an industrial personal computer, a servo amplifier, a servo motor, a planetary reducer, a No. 1 synchronous pulley, a synchronous cog belt, a No. 2 synchronous pulley, an output rotating shaft, an electromagnetic shielding box, a conducting slip ring, a tote cart, a clamp, an acoustic sensor group, a sensor cable, a conditioning circuit, a six-channel synchronous data acquisition card and a fast chuck, wherein the aerospace engine is arranged on the tote cart; the industrial personal computer controls the servo motor to drive the output rotating shaft to rotate, the fast chuck for mounting and clamping the aerospace engine is mounted at one end of the output rotating shaft, and the electromagnetic shielding box and the rotor part of the conducting slip ring is mounted at the other end of the output rotating shaft; the detection signal of the acoustic sensor group is fed back to the industrial personal computer.