43results about How to "Avoid harmonic interference" patented technology

The embodiment of the invention provides a method for resisting high order harmonic interferences of a display screen MIPI (Mobile Industry Processor Interface) bus. Corresponding relationship between radio frequency communication bands capable of being used by a mobile terminal and safe frequencies of the display screen MIPI bus is pre-stored in the mobile terminal, wherein high order harmonics produced when the display screen MIPI bus works in the safe frequencies will not fall in the corresponding radio frequency communication band range. The method comprises following steps of detecting the radio frequency communication band currently used by the mobile terminal; searching the safe frequency of the display screen MIPI bus corresponding to the radio frequency communication band currently used by the mobile terminal according to the corresponding relationship; and setting the current working frequency of the display screen MIPI bus as the searched safe frequency of the display screen MIPI bus. The interferences of the high order harmonics of the display screen MIPI bus are avoided from the source by setting the working frequency of the display screen MIPI bus as the searched safe frequency.

The present disclosure relates to an interference coordination method and device, a base station, user equipment, and a computer readable storage medium. The interference coordination method comprises that whether inter-device interference exists between uplink and downlink transmission of the user equipment (UE) in the two frequency bands is judged; and if it is determined that the UE has inter-device interference between uplink and downlink transmission of the two frequency bands, in a time interval during which the UE is scheduled to send uplink transmission in at least one frequency band of two frequency bands, the sending of downlink scheduling information of one frequency band is sopped to the UE or in a time interval in which the UE is scheduled to send uplink transmission in at least one frequency band of two frequency bands, a blank subframe or a quasi-blank subframe is sent to the UE, or in a time interval of sending downlink scheduling information of one frequency band to the UE, the sending of the uplink scheduling information of at least one frequency band in two frequency bands to the UE is stopped. According to the embodiment of the invention, the aim of avoiding data channel interference in equipment can be achieved.

The invention provides a vibroseis slip sweep data acquisition and processing method and device. The method comprises the steps that vibroseis vibration signal record data and all records of ground force signal data acquired based on predetermined sweep signal, the distance between vibroseis groups and slip time parameters are acquired by the preset vibroseis slip sweep acquisition method; data division is performed on the vibroseis vibration signal record data according to vibroseis group vibration starting time so that the single shot vibration record of the shot point corresponding to each vibroseis group is acquired; and deconvolution processing is performed on the single shot vibration record by using all records of ground force signal data so that the high-fidelity seismic single shot data record can be acquired. With application of the vibroseis slip sweep data acquisition and processing method and device, the problem that the high-fidelity seismic data cannot be acquired by the vibroseis seismic exploration correlation method slip sweep efficient acquisition technology can be solved so that the fidelity of the original seismic exploration data can be guaranteed and the construction efficiency of field production can also be guaranteed.

A television includes a light source, a pulse-width-modulation (PWM) controller, and a control component. The PWM is coupled electrically to the light source, and is operable so as to generate a source control signal for controlling turning on and turning off of the light source. The control component is coupled to the PWM controller for controlling frequency of the source control signal outputted by the PWM controller. The control component has a plurality of control states that correspond to distinct display scanning frequencies of television standards, respectively. Setting of the control component in a selected one of the control states results in control of the frequency of the source control signal outputted by the PWM controller such that the frequency of the source control signal is not an integer multiple of the distinct display scanning frequency that corresponds to the selected one of the control states.

The invention relates to application of high-voltage variable-frequency control system in mine winder. Wherein, with asynchronous motor flexible draught closed loop as control strategy, generating proper frequency and amplitude and three-phase sine signal command by the controller according to error between given and feedback rotation speeds to send to high-voltage frequency converter to output ac power accorded with said request to drive motor with running performance rigorous coincidence with request; using IGBT chopping-wave resistance braking mode or of regenerative braking controlled rectifier for motor electric brake. This invention improves speed regulation quality of winder obviously, saves 30-40% energy, increases power factor more than 0.96, and solves difficulty of high-voltage heavy-power motor in four operating conditions.

The invention relates to an undervoltage tripper, comprising a rectification circuit, an electromagnet coil, am armature, a buck circuit, a relay, a sampling circuit and a main control module, wherein the rectification circuit is connected with an external power grid, and the armature is controlled by the electromagnet coil; the main control module stores a rated voltage Ue and a strong start voltage value and is used for collecting an output voltage and a voltage period of the sampling circuit, so that an effective value and a pulse direct current voltage value of the external power grid are calculated; when the voltage of the external power grid reaches to 80% of the rated voltage Ue, and the pulse direct current voltage reaches to the strong start voltage value, a normally open contact is closed firstly, and a switch circuit is turned on, after the armature is closed, the normally open contact is disconnected; and when the voltage of the external power grid is less than 50% of the rated voltage Ue, the switch circuit is turned off. The tripper is reliable in closing, small in coil heating value, strong in anti-interference capacity, and applicable to frequency conversion occasions like generators.

The invention discloses a dust collection device. The problems of poor collection effect and high electricity consumption amount of a dust collection device in the prior art are solved. A method adopted by the dust collection device for controlling an air suction motor to work comprises the following steps that 1, data is initialized; 2, when a waste sensor senses waste, a pulse number M, a pulsewidth value R and a pulse width change value delta R start to be calculated; 3, the pulse number M at the moment when preset time T is up is recorded, and a first pulse threshold value M1, a second pulse threshold value M2 and a pulse width change threshold value S are preset in a control circuit, wherein M1 is smaller than or equal to M2, and if the pulse number value M is smaller than or equal to M1 and the pulse width change value delta R is smaller than or equal to S, the first step is returned to; if M is larger than or equal to M1 and smaller than or equal to M2, the pulse width change value delta R is smaller than or equal to S, and the pulse width value R is decreased, the firs step is returned to; if the pulse number value M is smaller than or equal to M1, the pulse width change value delta R is smaller than or equal to S, and the pulse width value R is decreased, a PWM value output by the control circuit is decreased, and the rotation speed of the air suction motor is lowered; otherwise, the PWM value output by the control circuit is increased, and the rotation speed of the air suction motor is increased.

The invention provides an AC/UPS hybrid networking device and a method thereof. The device comprises: an AC distribution panel, a UPS connected with the AC distribution panel, and a control cabinet connected with the UPS and the AC distribution panel, wherein, the control cabinet comprises a comparative control circuit, a driving circuit and a high-speed silicon controlled static switch; the comparative control circuit sends a control instruction after comparing a received signal with a default reference signal; after receiving the control instruction, the driving circuit controls the high-speed silicon controlled static switch to strobe a corresponding current path which is directly connected with the AC distribution panel or connected with the UPS. Compared with the best technology of the normally used networking mode, the invention has the maximum benefit of reducing the average power consumption of more than 25 percent, also can basically avoid the harmonic interference and save the harmonic treatment expenses; as the hybrid networking equipment preferably selects AC as power, the dependence on the UPS is reduced, therefore, the quantity of the equipped UPS can be reduced, thus having the advantage of reducing the networking equipment investment.

The invention relates to an undervoltage tripper with low power consumption and applicable to a three-phase supply. The undervoltage tripper comprises an electromagnet coil, an armature, a rectification circuit, a buck circuit, a relay, line voltage detection modules, a sampling circuit and a main control module, wherein the main control module stores a rated voltage Ue and a strong start voltage value and is used for collecting an output voltage and a voltage period of each line voltage detection module, so that an effective value of each line voltage of the three-phase supply is calculated; when the effective value of each line voltage of the three-phase supply reaches to 80% of the rated voltage Ue and a sampling voltage of the sampling circuit reaches to the strong start voltage value, a normally opened contact is closed firstly, and a switch circuit is turned on, after the armature is closed, the normally open contact is disconnected; and when the effective value of any one line voltage is less than 50% of the rated voltage Ue, the switch circuit is turned off.

The invention relates to an X-ray tube high-voltage power supply. The X-ray tube high-voltage power supply is characterized by comprising a push-pull inversion circuit, a high-frequency transformer and a low-ripple voltage doubling rectifying circuit.

The invention discloses a data transmission method, a data receiving method and a terminal. The data transmission method comprises the steps of acquiring a plurality of transmission units for transmitting data; determining at least one to-be-processed array according to the plurality of transmission units, wherein the to-be-processed array comprises N transmission units selected from the pluralityof transmission units, wherein each of the transmission units has an identification information; encoding the array to be processed to obtain the array to be transmitted; wherein size order of the identification information of the N transmission units in the array to be transmitted is not from small to large or from large to small; determinign target data according to that array to be transmit, and transmitting the target data to a receiving device. The invention is advantageous in eliminating signal periodicity when transmitting data, avoiding periodic waveform when transmitting data to be transmitted, thereby avoiding harmonic interference.

The invention discloses a zero-cross detection system. The system comprises a zero-cross signal sampling module, a power module and a direct current filtration module, wherein the zero-cross signal sampling module comprises a thunder-proof surge interference circuit and an inductor, the thunder-proof surge interference circuit is connected with an alternating current fire line input end, an alternating current zero line input end and a primary winding of the inductor and at least comprises a safety capacitor, the primary winding of the inductor and the safety capacitor constitute a first filtration circuit, and the primary winding of the inductor is connected to an alternating current grid in series; the power module comprises a bridge rectifier, a clamping circuit, a booster transformer and a primary side feedback system, the clamping circuit is connected with a second auxiliary winding of the booster transformer, a first auxiliary winding of the booster transformer is connected withthe primary side feedback system, and a buffer circuit is arranged on a secondary side winding of the booster transformer and a direct current voltage output end. The problems of delay of the samplingcircuit, poor sampling consistency and high loss can be solved.

The invention provides a harmonic-wave removing method in multi-seismic-source seismic data processing, and belongs to the field of oil exploration. The method comprises: (1) for multi-seismic-source single-shot data, each arrangement is taken as a unit, road rearrangement is performed according to a sort increment, and harmonic waves after the rearrangement are displayed on the data in random anomaly shape distribution; (2) regional anomaly attenuation testing and processing are performed on shot gather data after the rearrangement, and the harmonic waves in the random anomaly shape distribution are attenuated until being removed; and (3) the shot data obtained in the step (2) is recovered in anti-sorting manner according to a shot sequence and a road sequence, and the obtained shot gather data is shot gather data in which the harmonic waves are removed cleanly.

The invention relates to a motor drive control circuit and system. According to the invention, a starting circuit is arranged at the front end of a motor; the starting circuit can control the motor tobe started to generate induced electromotive force when the motor working in a counter electromotive force commutation mode is static, a corresponding observation waveform is obtained, and therefore,rotor position information of the motor is obtained; and meanwhile, a back electromotive force filtering and shaping circuit is arranged in front of a decoding circuit, and the input end of the backelectromotive force filtering and shaping circuit is connected between a main control circuit and the motor, so processing can be carried out according to a sampling signal and a back electromotive force signal of the motor, and filtering of the sampling signal and elimination of back electromotive force pulse sharp waves are realized, and therefore, the problem of interference in the low-speed operation process of the motor is avoided. Through a technical scheme of an embodiment in the invention, the motor can be controlled to be started at a low speed to obtain the position information of the motor rotor when the motor is in a static state, filtering optimization can be carried out on signals in the operation process of the motor, harmonic interference is avoided, and high driving reliability is achieved.

The invention discloses a vehicle-mounted wireless communication GNSS and cellular coexistence interference suppression circuit structure which mainly exists in a common board of a GNSS system and 4G and 5G modems and mainly comprises cellular 4G and 5G radio frequency paths and a GNSS receiver radio frequency path. The cellular 4G and 5G radio frequency paths mainly comprise a radio frequency low-pass filter LPF and a wave trap circuit NOTCH1; the wave trap circuit NOTCH1 and the radio frequency low-pass filter LPF are separately constructed; the radio frequency low-pass filter LPF is a low-pass filter circuit formed by connecting two inductors in series, and the wave trap circuit NOTCH1 is composed of an inductor and a capacitor; the GNSS receiver radio frequency path mainly comprises a wave trap circuit NOTCH2, a high-pass filter HPF and a GNSS receiver; the high-pass filter HPF is mainly formed by connecting two capacitors in series; and the wave trap circuit NOTCH2 is composed of an inductor and a capacitor. According to the invention, the high-suppression LPF + NOTCH circuit is additionally arranged on the cellular radio frequency path, so that the harmonic spurious interference is reduced, and meanwhile, the NOTCH + HPF circuit is additionally arranged on the GNSS radio frequency path, so that the dominant wave signal strength is reduced.