38results about How to "Play the role of filtering" patented technology

The utility model discloses a processing circuit used for improving the performance of the audio equipment, and the processing equipment thereof. The processing equipment comprises a casing body, the input terminal interface of an audio host machine is arranged at one side of the casing body, the input terminal interface of a power supply is arranged at the other side of the casing body, a protective tube with filtering function is connected on the anode power wire of the input terminal of the audio host machine in series, and a capacitor is bridged between the anode power wire of the input terminal and the cathode power wire of the input terminal of the audio host machine. The processing equipment has the advantages that all sorts of harmful resonance in the circuit can be effectively restrained through the capacitor, and the capacitor plays the role of filtering; the protective tube with the filtering function can effectively restrain all sorts of harmful resonance in the circuit, and plays the role of filtering, reduces the impedance caused by vibration, and improves the degree of purity and the stability of the power supply, the higher harmonics components harmful to the signals are eliminated through the optimization of the quality of the power supply, and the powerful output capability is provided for the machine through the high-quality abundant electric current.

The invention discloses a wireless and magnetic field induction technology combined high precision positioning technology and a corresponding sensor device. The specific technology includes that: (1) a matrix distribution analog Hall voltage detection way is adopted; (2) a wireless radio frequency technology is employed to identify landmark information, and positioning and identification are combined into one; (3) the indoor and outdoor general positioning sensor is not disturbed by rain, snow, thunder, electricity and other environmental factors; and (4) the positioning sensor and method support multi-interface communication and multi-module combination. Compared with current traditional magnetic induction positioning technology, the positioning sensor and method provided by the invention have the advantages of high positioning precision, good stability, good scalability, low cost, concise connection line, and strong anti-interference ability, etc., and are suitable for high precision mobile robot magnetic stripe navigation under various environments.

The present invention discloses a fuse tube with the function of wave filtration, and the fuse tube includes a metal wire and a tube; wherein, the metal wire is arranged in the tube which is filled with granular electric wave absorption materials. The granular size of the electric wave absorption materials stands at 50 items to 300 items. The advantage is that the tube is filled with granular electric wave absorption materials that can well absorb or isolate the interference of miscellaneous waves, at the same time, reduce and restrain the influences of the miscellaneous wave interference produced in the working of the machine on other equipments via a power supply loop. By entering into the front end of the machine power supply, the function of wave filtration can be effectively broughtinto full play, thus letting the machine have better anti-interference capability in the increasingly serious ambience of electromagnetic interference and have more stable working performance and thestate of the machine.

The invention discloses a magnetic-integration three-phase filter transformer. The magnetic-integration three-phase filter transformer comprises a transformer core window, wherein a leakage flux branch plate is arranged in the transformer core window; gaps are respectively reserved between the leakage flux branch plate and an upper yoke and between the leakage flux branch plate and a lower yoke; a high-voltage winding coil and a low-voltage winding coil are respectively wound between core columns and the leakage flux branch plate; a low-voltage winding is positioned on the inside, and a high-voltage winding is positioned on the outside; and a filter capacitor is connected with the low-voltage winding coil in parallel. A filter inductor is integrated with the transformer, so that the size of the integrated body of the inductor and the transformer is small, the inductor and the transformer are light, and materials are saved. The columns of three-phase cores are in magnetic flux with the filter inductor and the transformer simultaneously. When the magnetic flux is highest, common magnetic flux and leakage magnetic flux are in different phases, and magnetic cores can be saved to a certain degree. Four single-phase windings of the transformer also have a filtering function, and substitute an independent filter inductor. Moreover, the number of used copper wires of the transformer and the inductor which are integrated is smaller than the number of used copper wires of the transformer and the inductor which are independent from each other.

The present invention relates to a parameter identification method of oil-paper insulation Debye circuit based on self-adaptive sampling interval Prony algorithm. The method improves the traditional Prony algorithm according to the physical characteristics of the Debye equivalent model depolarization current exponential function superposition. The sampling interval can accurately solve the time constant range, realize the adaptive selection of the sampling interval, and use the adaptive sampling interval to perform Prony fitting on the relaxation sub-spectral line of the corresponding time constant; after obtaining the sub-spectral line parameters, substitute it into Debye et al. The equivalent circuit parameter identification formula is used to realize the identification of equivalent circuit parameters. The inventive method avoids the subjectivity of artificial point selection and sampling interval selection, plays a filtering role on the measured depolarization current with noise interference, and accurately and uniquely realizes the identification of the Debye equivalent circuit parameters of the oil-paper transformer.

The embodiment of the invention discloses a rectifier-bridge-free power-taking circuit formed by using MOS tubes and diodes. With the provided circuit, a technical problem of multi-stage losses caused by energy conversation at multiple places in the rectifier-bridge-included rectification conversion circuit in the prior art can be solved. The rectifier-bridge-free power-taking circuit comprises a power-taking boost module, a rectification module connected with the power-taking boost module electrically, and a filter and voltage-stabilizing module connected with the rectifier module electrically. The rectification module consists of a first MOS tube S1, a second MOS tube S2, a first diode Ds1, a second diode Ds2, a third diode D1, and a fourth diode D2.