38results about How to "Improve mutual interference" patented technology

A low-cost communication system utilizing a code division multiple access, which controls scale-up of an apparatus due to the provision of an interference suppressing function in a base transceiver station, prevents the reduction of channel utilization efficiency, and enables a high-quality communication. Conventionally, a signal obtained through an interference cancellation stage process has been processed at subsequent cascade-connected stages. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. However, in the present invention, by performing a demodulation process for generating replica signals, feeding back the replica signals to a correlation circuit for another demodulation process, and repeating the same signal process, the interference cancellation stage process is carried out. Such a configuration enables reduction of hardware.

The invention relates to a three-phase single-section / double-section multiple-pole switching reluctance motor. A casing of the motor is arranged on a base, the middle part of the casing is provided with a hanging ring of the motor, a front end cover and a back end cover are respectively arranged at both ends of a rotating shaft, rotors are arranged between the front end cover and the back end cover, an air cover is arranged outside the back end cover, a fan is arranged in the air cover, and a sensor is arranged between the back end cover and the fan or between the back end cover and a second-section rotor; the motor comprises stators and the rotors with a structure of double convex poles, also comprises one section or two sections and can run by a single section or double sections; the iron cores of the stators and the rotors both comprise a single section or two sections, and the lengths and the diameters of the iron cores of the two sections of the stators and the rotors are equal; two sets of concentrated windings or sandwich windings are respectively arranged on two sections of stator teeth, and armature windings on two teeth of the same phase of each set of windings are connected in series or in parallel to form one phase; the magnetic poles of the two sections of stators are aligned, and the difference of the magnetic poles of the two sections of rotors is 1 / 2 of a rotor polar distance angle; or, the magnetic poles of the two sections of rotors are aligned, and the difference of the magnetic poles of the two sections of stators is 1 / 2 of a stator polar distance angle; and the invention has the characteristics of high efficacy, high starting torque, easy control and low cost.

The invention discloses a high-frequency and high-speed frequency testing system based on a phase locking technique, comprising a standard signal source, a power supply device, a PCB (printed circuit board), a plurality of testing units arranged on the PCB and a data storage and display device, wherein the standard signal source is electrically connected with each testing unit respectively; each testing unit comprises a data acquisition module, a phase locking module and a data distribution module; the data acquisition module is used for acquiring the signal frequency of a tested product correspondingly; the phase locking module is used for carrying out phase comparison on the acquired signal frequency of the tested product and the standard signal source so as to obtain a comparison result, driving the corresponding tested product according to the comparison result and leading the phase of the tested product to be consistently locked with the phase of the standard signal source; and the data distribution module is used for outputting a phase value of the locked tested product to the data storage and display device for storage and display. The invention also discloses a high-frequency and high-speed frequency testing method based on the phase locking technique.

The invention discloses an anti-mutual interference method of a multimode gateway, and belongs to the technical field of Internet information interaction. The anti-mutual interference method comprises the following steps: controlling the priority of multiple different types of communication modules and packet delivery rates corresponding to the priority with a master control module on the multimode gateway, so as to implement the anti-mutual interference communication among the communication modules. The communication modules comprise a wifi module, a Bluetooth module and a zigbee module. The priority of the communication modules is set and controlled through the master control module; the master control module dynamically regulates the packet delivery rate of the modules according to the priority of multiple modules and the communication requesting conditions of the communication modules, so that the probability of collisions between data packets of the modules is reduced, the mutual interference between the modules is improved, the stability of data transmission is enhanced, and the user experience is improved.

The triaxial apparatus includes three portions: host; hydraulic power source connected to servo valve for loading electrohydraulic in three directions in host through pipe; automatic control system connected to the input signal measured by sensor as well as connected to electrical signal output from servo valve. The host includes pressure chamber, axle load mechanism, twist mechanism connected to the axle load mechanism in coaxial coupling, pressing-twisting mechanism between the pressure chamber and twist mechanism, balance-cylinder and side pressure mechanism. The balance-cylinder, side pressure mechanism and pressure chamber are connected through pipe so as to constitute self-balanced mechanism of hydraulic pressure. The invention overcomes interactional movement between axle load mechanism and twist mechanism of current triaxial apparatus of vibration and torison shear as well as overcomes disadvantages of side pressure mechanism. Features are: smooth waveform of load, and low cost.

The invention belongs to the field of low- concentration flue gas infra-red analyzers and corresponding detection methods and provides a low-concentration flue gas infra-red analyzer which is high in both precision and reliability. The flue gas analyzer adopts the structure that a gaseous contaminant detecting unit 8 comprises an infrared light source 10 and a chopper 11 behind the infrared light source 10, as well as an absorption cell 12, a measuring gas chamber 13, a light filter 14 and a detection sensor 15 which are arranged along the light path behind the chopper 11; an absorption cell sample gas inlet 16 and an absorption cell sample gas outlet 17 are formed on the absorption cell 12; and the measuring gas chamber 13 is divided into a sample cell 20 and a reference cell 21 in the light path direction so as to measure the flue gas in a high-precision manner. According to the invention, a non-dispersion infrared monochromatic source is utilized to shine the sample gas, so as to realize quantitative and accurate analysis of the to-be-tested sample gas. The infra-red analyzer and the detection method, provided by the invention, are suitable for measuring a low-concentration NO flue gas, and can also be used for the detection of low-concentration CO, CO2 and other flue gases.

The invention discloses a design method of an electrostatic negative stiffness accelerometer. The method is characterized by comprising the steps that S1, an interface electromechanical model of the electrostatic negative stiffness accelerometer is established, and the interface electromechanical model is converted into a coordinate system equation; S2, by calculating electrostatic force of a combtooth capacitor, the position length and symmetric design of a driver and driven detection comb teeth are determined; S3, according to the electrostatic force feedback principle, planning design is performed on the size and spacing of embedded detection comb tooth electrodes; and S4, according to the principle of the acceleration and electrostatic negative stiffness effect in the accelerometer based on electrostatic negative stiffness regulation, a relational expression influencing acceleration finally is obtained. The design method of the high-performance FM accelerometer based on electrostatic negative stiffness regulation is good in use effect and has quite high application and popularization value.

The invention discloses a magnetic resonance multichannel digital transmission system, including a multipath data multiplexing unit, a data encapsulation unit, a high speed serial transmission unit, a fiber transmission unit, a fiber reception unit, a high speed serial reception unit, a data unpacking unit and a multipath data demultiplexing unit. Multichannel magnetic resonance digital signals after sampling and front-end processing are subjected to multiplexing according to magnetic resonance data word lengths, obtained data of all channels are polled as a frame, and frame synchronization codes required in demultiplexing are inserted at a frame header, and thus the real-time property and the integrity of magnetic resonance data are ensured. Synchronous clock information is inserted in line coding, and thus transmission of magnetic resonance data and clock can be completed using a single channel, and system equipment is simplified. FPGA chip programming realization is used to improve the system integration degree. The invention also provides a magnetic resonance multichannel data transmission method.