9 results about "Ringing" patented technology

The application discloses a high-frequency resonant current characteristic measurement method and relates to the technical field of high-frequency electric characteristic measurement, and comprises the following steps: detecting a transient trigger signal and pausing power driving to create a measurement interval; in the measurement interval, passively collecting a natural ringing signal of a load, determining a current measurement paradigm in a passive ringing analysis paradigm and an active probe measurement paradigm based on the amplitude characteristics of the signal; and performing corresponding measurement actions according to the current measurement paradigm. The application realizes adaptive switching of the measurement paradigm by introducing a window environment diagnosis step before measurement, and solves the technical contradiction that the active probe is easily polluted by ringing and the passive measurement is easily invalid due to signal depletion.

Provided is an acoustic magnetic (AM) anti-theft system with which it is possible to widen the permissible range of a resonance frequency of a tag. The acoustic magnetic anti-theft system comprises a transmission unit 20, a tag 10, a reception unit 30, and a tag detection processing unit 42. The transmission unit 20 transmits a burst signal during a transmission period. The tag 10 resonates with the burst signal that is transmitted from the transmission unit 20, and outputs a ringing-down signal. The reception unit 30 receives the ringing-down signal during a reception period after the transmission period. The tag detection processing unit 42 detects the tag 10 on the basis of the ringing-down signal that is received by the reception unit 30. Each cycle includes a transmission period in which a burst signal in the 57 kHz band is transmitted and a transmission period in which a burst signal in the 58 kHz band is transmitted.

This invention provides a method for processing evoked electromyography (EMG) artifacts based on slope acceleration detection and morphological scaling. The method includes: acquiring EMG signals with the stimulus trigger as the zero point of time; extracting the terminal resting segment, calculating the first-order difference standard deviation, and constructing an adaptive threshold; calculating the local slope amplitude, sign, and historical slope reference point by point within the search interval, and determining the artifact end index based on polarity reversal, slope acceleration, or smooth exit criteria; linearly scaling the artifact segment using the end point as an anchor point to suppress artifact amplitude and eliminate boundary steps; performing a second-order bidirectional zero-phase bandpass filter on the scaled signal to filter out interference and retain waveform phase; scaling the original signal and backfilling it into the artifact segment, followed by level alignment and square root fade-in processing to reconstruct a smooth and continuous physiological signal. This invention achieves precise positioning of artifact boundaries and distortion-free signal reconstruction, possessing advantages such as thorough artifact suppression, no ringing distortion, complete preservation of physiological morphology, and strong adaptability.

The application discloses a force-sound decoupling composite structure for a closed loudspeaker box, and solves two problems of structural ringing of a full-metal box and reaction force of an internal sound field. A sandwich gradient structure of a viscoelastic damping layer, a rigid constraint isolation layer and a porous fiber sound absorption layer is sequentially constructed on the metal box wall, and a sound impedance gradient decreasing sequence is deliberately designed, so that the structural vibration and the sound field problem are physically separated and efficiently processed. The design significantly reduces system distortion and transient tailing, and restores the effective electro-acoustic conversion efficiency consumed by internal friction due to the structural defects of the box. The application also discloses a construction method of the composite structure, and strictly controls the layer sequence to ensure the realization of the force-sound decoupling effect.

This application provides a method and related apparatus for playing a prompt tone. The method is applied to the calling side access network and includes: allocating a first air interface resource to the calling UE after media negotiation with the called side access network; sending resource reservation completion information to the called side access network; wherein the resource reservation completion information is used by the called side access network to send call confirmation information to the called UE after allocating a second air interface resource to the called UE; the call confirmation information is used by the called UE to send a prompt tone playback instruction to the called side access network; receiving first ringing information indicating the prompt tone playback mode sent by the network side based on the prompt tone playback instruction, and instructing the calling UE to play the corresponding first prompt tone data based on the prompt tone playback mode, thereby realizing the prompt tone playback function of a low-power communication system.

The application discloses a high-frequency resonant current characteristic measurement method and relates to the technical field of high-frequency electric characteristic measurement, and comprises the following steps: detecting a transient trigger signal and pausing power driving to create a measurement interval; in the measurement interval, passively collecting a natural ringing signal of a load, determining a current measurement paradigm in a passive ringing analysis paradigm and an active probe measurement paradigm based on the amplitude characteristics of the signal; and performing corresponding measurement actions according to the current measurement paradigm. The application realizes adaptive switching of the measurement paradigm by introducing a window environment diagnosis step before measurement, and solves the technical contradiction that the active probe is easily polluted by ringing and the passive measurement is easily invalid due to signal depletion.

The application provides an anti-ringing circuit and a DC-DC converter. The anti-ringing circuit is applied to the DC-DC converter, and comprises multiple-stage anti-ringing branches and a matching branch. The multiple-stage anti-ringing branches are connected in parallel with each other, and the matching branch is connected in series with the multiple-stage anti-ringing branches connected in parallel at both ends of an inductor of a main circuit of the DC-DC converter. Each anti-ringing branch comprises a switch tube and a resistor connected in series. The matching branch comprises a matching switch tube. When the switch tube in any one-stage or multiple-stage anti-ringing branch is turned off, the resistor in the one-stage or multiple-stage anti-ringing branch is disconnected with the inductor. When the switch tube in any one-stage or multiple-stage anti-ringing branch and the matching switch tube are turned on, the resistor in the one-stage or multiple-stage anti-ringing branch is connected in parallel with the inductor. The application can flexibly adjust the current in each anti-ringing branch.

The application provides a transducer driving control circuit and a transducer driving control method. The transducer driving control circuit comprises a driving module, a ringing suppression module, a switch and a controller. The driving module is connected with the transducer and is used for sending a pulse driving signal to drive the transducer to vibrate. The ringing suppression module is connected with the transducer and is used for suppressing the ringing of the transducer. The switch is connected between the ringing suppression module and the transducer. The controller is used for controlling the switch to be turned on for a preset on duration at the moment when the driving module finishes sending the pulse driving signal. The preset on duration is positively correlated with the cycle number and the voltage value of the pulse driving signal. The preset on duration can be obtained according to the cycle number and the voltage value of the pulse driving signal. The communication between the ringing suppression module and the transducer is controlled for the preset on duration. The ringing suppression is performed when the transducer rings. The ringing suppression is not performed when the transducer ends the ringing. The performance of the transducer is improved.

The disclosure relates to a low frequency switching device (1) and method for minimizing switching noise caused by back-EMF in inductive loads. The device comprises a load (3), a switching device (4) driven by a digital logic signal, and a programmable voltage or current source (2) supplying the switching device. The programmable source is configured to output a voltage / current with a curved rising and / or falling edge preceding or trailing polarity switching, the rise and / or fall time being greater than zero. By controlling the edge profile and decaying response frequency equal to the switching frequency, stored inductive energy in the load, cabling, or switching device is substantially depleted before polarity reversal, thereby suppressing voltage spikes, ringing, and electromagnetic noise. The switching device may comprise transistors or relays in an H-bridge configuration, and the programmable source may output rectified signals with sine-wave components. The invention is particularly advantageous for subsea electromagnetic survey systems, where electrodes in seawater form the load, enabling reliable low frequency operation in the range 0.01–100 Hz with reduced interference and improved signal quality.