66 results about "Single tone" patented technology

The invention relates to the field of intelligent guitars, in particular to a single-tone playing and singing method of an intelligent guitar and the intelligent guitar, and the method comprises the following steps: a mobile terminal APP or a cloud server sends a song data packet to the intelligent guitar through wireless communication; analyzing the data packet by the intelligent guitar, lightening backlight LEDs of chord touch keys on a neck fingerboard according to a time sequence, and guiding the user to press the position by the left hand; the user is guided to shift the position by the right hand through a display screen or light; after a user pokes an appointed key according to a display screen or light prompt, corresponding audio information in a data packet is triggered, light guides the user to press a corresponding chord touch key and a single-tone module at correct time, the guitar playing proficiency of a beginner is improved, a silica gel plucking sheet of the single-tone module can simulate the real string distance, and the guitar playing experience is improved. Compared with a traditional string-free intelligent guitar, the string-free intelligent guitar has the hand feeling closer to that of a traditional guitar, and single-tone playing is achieved.

The invention relates to the technical field of intelligent guitars, in particular to an intelligent guitar plectrum control system and method, and the system comprises a mode switching module which provides three working modes: a playing and singing mode, a single-tone following mode, and an AI impromptu mode; the deflector rod assembly comprises a deflector rod A, a deflector rod B, a chord key module and a control logic module, and can switch playing and singing, single-tone and AI impromptu modes, the playing and singing mode adapts to chord accompaniment scenes, single-tone playing and singing focus on melody learning, the AI impromptu mode meets creation requirements, different scene requirements of users are covered, and practicability is high; meanwhile, an anti-false-triggering mechanism is arranged, driving lever action and chord pressing combined triggering are required, noise caused by accidental touch of the driving lever in playing is avoided, normal playing is guaranteed, meanwhile, the output strength can be dynamically adjusted according to the pushing speed of the push rod, the playing expressive force is effectively improved, different functions are achieved through driving of the driving lever, and the playing efficiency is improved. The learning cost of a user can be reduced, and operation consciousness is improved.

The embodiment of the invention provides a multi-tone signal sending method and device. The method comprises the steps that a first multi-tone signal is generated, the first multi-tone signal comprises N single-tone signals, the amplitude value of each single-tone signal is the same, the initial phases of at least two single-tone signals in the N single-tone signals are the same, or the absolute values of the initial phases of at least two single-tone signals in the N single-tone signals are the same, and N is an integer larger than or equal to 2; and sending the first multi-tone signal. According to the method disclosed by the invention, the average power of multi-tone signal transmission can be improved, and the transmission distance or the coverage range of the multi-tone signal can be further improved.

A gyro sensor circuit includes a gyro sensor generating a radio frequency (RF) sensing signal according to an angular movement of the gyro sensor, and an RF sensing path comprising a first chopper comprising a chopping switch, and configured to chop a tone signal at a chopping frequency to generate a chopped tone signal, an adder configured to insert the chopped tone signal to the RF sensing signal to produce a combined RF sensing and tone signal, and a first demodulator configured to mix the combined RF sensing and tone signal with a local oscillator (LO) signal to output a demodulated signal. The tone signal may be the LO signal. The gyro sensor circuit further comprises a sense base band path comprising a first analog-to-digital converter configured to sample the demodulated signal to output a digitized signal, and a first digital signal processor to extract various signals to be analyzed.

A measurement signal processing method and apparatus are provided. The method includes: a first node (110) determines a type of measurement signal sent and / or received by a second node (120). The first node (110) is a master node, and the second node (120) is a slave node. The second node (120) is a measuring node or a measured node, and the measurement is ranging, angle measurement, or positioning performed on the measured node. The first node (110) sends first information to the second node (120). The first information indicates a type of measurement signal, and the type of measurement signal includes a single-tone signal or a multi-tone signal. According to the measurement signal processing method and apparatus, the type of measurement signal sent or received by the node can be determined, and the type of measurement signal is indicated to the node. Thus, the node can implement ranging, angle measurement, or positioning.

The present invention discloses a distributed high-dynamic node system and a transmission beam coherent synthesis method thereof, which belongs to the field of antenna technology. The method comprises the following steps: first, N transmitting nodes enable reset to keep signal synchronization, and provide two working modes of single transmission and simultaneous transmission of modulation signal and positive / negative single-tone signal, and N nodes transmit wireless signals after keeping the signal carrier homology; then, the received modulation signal or multi-tone signal is down-converted and low-pass filtered at the receiving node; then, the phase difference between the transmitting nodes is estimated according to the positive / negative single-tone signal transmitted by the N nodes; finally, the phase difference result is fed back to the transmitting node for pre-compensation, maximizing the distributed node transmission coherent synthesis gain. The present invention has the advantages of flexible expansion, high real-time performance and easy implementation.

The application discloses a piano music segmentation and note recognition algorithm based on a deep learning network, and comprises the following steps: based on a recurrent neural network, obtaining the starting point of each single tone from a continuous piano audio; according to the starting point of each single tone, segmenting a complete piano audio signal into several single tone audios; constructing an audio data set for pitch recognition; pre-processing signals in the audio data set, drawing a transformed spectrogram, and simultaneously segmenting the spectrogram according to the frequency band of each fundamental frequency to obtain a sub-spectrogram; taking the multiple sub-spectrograms segmented from the spectrogram as input, and recognizing the pitch through multiple convolutional neural networks. Compared with a traditional time domain method, the application no longer depends on the selection of a threshold, improves the generalization ability, compared with a traditional frequency domain method, simplifies the calculation process, and improves the running speed.

1. The name of the design product: single tone plucking module. 2. The use of the design product: single tone plucking module for electric guitar. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention provides a zero intermediate frequency transceiver receiving channel IQ imbalance calibration method, and relates to the field of radio frequency transceiver calibration. In the method, a single-tone calibration signal generator generates a single-tone signal in a self-calibration process; the dual-tone excitation signal synthesizer is used for generating dual-tone excitation signals in the self-calibration process; the radio frequency switch is communicated with the sending channel and the receiving channel in the calibration process, and an excitation signal sent by the sending channel is looped back to the receiving channel; the error extraction unit is used for extracting an IQ error and calculating a compensation coefficient; and the error compensation unit is used for compensating the link signal. According to the method, a dual-tone test signal is generated by a sending channel, and IQ unbalance is extracted and compensated in a receiving channel according to an algorithm provided by the invention. According to the method, a calibration environment does not need to be set up by external equipment, self-calibration of the chip can be realized, and the calibration cost of a single chip can be effectively reduced.

Embodiments of the present disclosure disclose a method and device for audio quality detection, electronic equipment, medium and product. The method comprises: collecting initial audio data and determining an effective signal segment of the initial audio data; performing slice processing on the initial audio data based on the effective signal segment to obtain a target audio slice that meets a preset slice condition; wherein the preset slice condition is an audio slice that meets a preset audio slice duration and the effective signal segment is not cut and allocated to different target audio slices; processing the target audio slice through a multi-model cascade decision mechanism to obtain a quality detection result of the initial audio data; wherein the multi-model cascade decision mechanism comprises a trained single-tone detection model and a trained audio score model.

The present application discloses a method for eliminating the Doppler shift of medium and low orbit satellites, comprising the following steps: calculating the user link Doppler shift and the feeder link Doppler shift according to the satellite position and movement speed at the compensation moment. The sum of the user link Doppler shift and the feeder link Doppler shift is taken as the total Doppler shift, and a single-tone signal is generated according to a frequency deviation value opposite to the total Doppler shift. The received signal of the gateway is down-converted into a baseband signal, the baseband complex signal and the single-tone signal are multiplied, and then up-converted into a radio frequency signal for output. The present application also includes an apparatus for implementing the method. The solution of the present application solves the problem that existing equipment cannot cope with the Doppler shift caused by the high-speed movement of low-orbit satellites in the communication link test based on medium and low orbit satellites.

A compressor near stall state voiceprint continuous monitoring method, system, medium and equipment, in the method, a predetermined number of microphone measuring points are randomly selected at the inlet to form a microphone array, and multi-channel sound pressure time domain signals are synchronously collected; a rectangular window is added to the multi-channel sound pressure time domain signal to construct an acoustic time domain signal segment, and a fast Fourier transform is performed on the multi-channel acoustic time domain signal segment in the current time domain window to form multiple sound pressure spectra; it is judged whether there are multiple non-synchronous single-tone characteristic frequencies which are non-integral multiples of the current rotation frequency in the sound pressure spectrum; a multi-channel microphone continuous frequency domain observation matrix of the non-synchronous single-tone characteristic frequency is constructed; an orthogonal Fourier transfer matrix is constructed based on the installation azimuth angle of the microphone sensor and the highest order of the mode; a compressor near stall characteristic mode reconstruction model under non-uniform few measuring points is established; the amplitude is solved based on the block orthogonal matching pursuit algorithm, and the compressor near stall working condition monitoring based on the voiceprint characteristics is realized.

The utility model discloses a sound production unit, which comprises a diaphragm assembly, a voice coil, a spacer, two basins and two magnetic circuit assemblies, and at least one of the basins is provided with a sound outlet. The magnetic circuit assemblies are connected with the basins in a one-to-one correspondence manner, and each magnetic circuit assembly is provided with a magnetic gap; the two sides of the vibrating diaphragm assembly are respectively connected with the basin stand, and the center of the vibrating diaphragm assembly is provided with a hollow window. The voice coil is located at the hollow window and is connected with the diaphragm assembly, and the top end and the bottom end of the voice coil respectively extend into the two magnetic gaps; the spacer is arranged in the hollow area of the voice coil, and the edge of the spacer is connected with the inner peripheral wall of the voice coil. The sound production unit is novel in structure, adopts a double-magnetic-circuit design, can fully utilize the front and rear cavity spaces of the sound production unit, increases the total volume of the magnetic steel, and improves the performance of the sound production unit; the structure of the single voice coil enables the sounding unit to be simpler in structure, facilitates the production of the sounding unit, and facilitates the control of the manufacturing cost of the sounding unit.

The application relates to the technical field of vehicle detection, and discloses a tire positioning method based on Bluetooth, a positioning system composed of a center node and four positioning anchor points, which comprises the following steps: selecting one anchor point as a target positioning anchor point to send a broadcast frame, the center node scans the broadcast frame to complete BLE connection; the center node initiates a phase ranging request instruction, sends and receives a single-tone signal in a frequency hopping mode at a predetermined frequency point, calculates a distance value between the center node and the target positioning anchor point according to the channel response of the single-tone signal; the position of the target positioning anchor point is calculated according to the distance value and the position of the center node; other anchor points are selected as target positioning anchor points to complete positioning according to the above steps, and tire positioning is completed in combination with the position of the center node. The positioning system composed of the center node and the four positioning anchor points is used to complete wheel positioning, and high positioning precision and a more convenient and automatic positioning mode can be provided on a Bluetooth device with low power consumption and low cost.

The invention relates to a silencer and a compressor, relates to the technical field of air conditioner compressor equipment, and aims to solve the problem of poor silencing and noise reduction effects of the silencer. The silencer comprises a mounting disc; the expansion cavity is arranged on the mounting disc, and at least one exhaust port is formed in the expansion cavity; the silencing assembly is arranged in the expansion cavity, one end of the silencing assembly communicates with at least one exhaust port, and the other end of the silencing assembly communicates with the expansion cavity; the to-be-muffled airflow enters the expansion cavity and the muffling assembly in sequence, the silencer is constructed in the mode that the expansion cavity of the silencer is used for eliminating broadband noise of the to-be-muffled airflow, and the muffling assembly is used for eliminating the single-tone peak noise of the to-be-muffled airflow at the preset frequency. The expansion cavity is used for eliminating broadband noise in airflow to be muffled, and the muffling assembly is used for eliminating single-tone peak noise of the preset frequency. In this way, elimination of broadband noise and elimination of single-tone peak noise of the preset frequency are achieved. And therefore, the silencing and noise reduction effects of the silencer are improved.

Embodiments are disclosed for a range-gated imager. In some embodiments, a method comprises: transmitting, with a single-tone continuous wave (STCW) radar, a signal; receiving, with the STCW radar, a return signal from a projectile impinged by the radar signal; counting, with a measuring apparatus, a specified number of periods of non-ambiguity range based on the return signal, performing a flashing operation; and gating or triggering, by the measuring apparatus, an imager to capture an image of the projectile in response to the count reaching the specified number of periods.

The invention provides a distance zero value self-correcting method based on a radio frequency agile transceiver chip. The distance zero value self-correcting method comprises the following steps: configuring the radio frequency agile transceiver chip into a dual-channel mode; a manual gain control mode is selected as a receiving channel gain control mode of a radio frequency agile transceiver chip, and gain values of a working branch receiving channel and a self-correcting branch receiving channel are manually set to be the same; a radio frequency output signal of a transmitting channel Tx2 of the self-correcting branch is connected to a radio frequency receiving end of a receiving channel Rx2 after being subjected to down-conversion and solid attenuation processing; tone-FM single tone frequency modulation is adopted for signal modulation of the transmitting end of the self-correcting branch; single-tone frequency modulation signal demodulation is carried out at the receiving end of the self-correction branch, a single-tone signal is recovered from the received signal through a frequency discrimination technology, phase comparison is carried out on the recovered single-tone signal and an original single-tone signal output by the transmitting end of the self-correction branch, and a distance zero value of the self-correction branch is obtained; and compensating a radio frequency output signal of a transmitting channel Tx1 and a radio frequency signal of a receiving channel Rx1 of the working branch according to a ranging zero value obtained by the self-calibration branch.

Embodiments are disclosed for a range-gated imager. In some embodiments, a method comprises: transmitting, with a single-tone continuous wave (STCW) radar, a signal; receiving, with the STCW radar, a return signal from a projectile impinged by the radar signal; counting, with a measuring apparatus, a specified number of periods of non-ambiguity range based on the return signal, performing a flashing operation; and gating or triggering, by the measuring apparatus, an imager to capture an image of the projectile in response to the count reaching the specified number of periods.

The application discloses a music interaction system and method based on virtual reality, and belongs to the technical field of virtual reality. The system comprises a single tone interaction module, which is used for simulating notes in a piece of music through single tone interaction bodies corresponding to the notes, the single tone interaction bodies can visually guide the interaction of users, and the interaction results are obtained according to the time and mode of the interaction between the users and the single tone interaction bodies; a level visualization module is used for visually outputting the single tone interaction bodies; when a certain note in the piece of music is played, the corresponding single tone interaction body is displayed according to preset display time points, poses and expected interaction modes; and a numerical management module is used for feeding back the interaction results between the users and the single tone interaction bodies. The single tone interaction bodies are simulated through virtual reality technology to simulate the notes in a piece of classical music, the users practice, teach or simulate the performance through the interaction with the single tone interaction bodies, and the teaching is more interesting.

The present invention discloses a wearing detection method and system for a wearable device, the wearing detection method comprising: generating a single-tone signal and an orthogonal signal of the single-tone signal; transmitting the single-tone signal and receiving a reflected signal of the single-tone signal; calculating a propagation delay phase according to the single-tone signal, the orthogonal signal, the reflected signal and a preset sliding integration time; and obtaining a wearing state of the wearable device according to the propagation delay phase. In the present invention, the preset sliding integration time is an integer multiple of a half-cycle of the single-tone signal, so that the propagation delay phase obtained by the sliding correlation integral operation and phase calculation is independent of the amplitude of the reflected signal, and can avoid problems such as detection errors caused by amplitude jitter of the reflected signal in the prior art, thereby improving the accuracy of the wearing state detection of the wearable device; at the same time, a complex receiving front-end amplification circuit is not required, and the single-tone signal width requirement is relatively low.

The present invention discloses a distance measurement method and system, the method comprising: generating a single-tone signal and an orthogonal signal of the single-tone signal; transmitting the single-tone signal to a reflecting surface and receiving a reflected signal of the single-tone signal; calculating a propagation delay phase of the reflected signal based on the single-tone signal, the orthogonal signal, the reflected signal, and a preset sliding integration time; and calculating the propagation delay of the reflected signal based on the propagation delay phase of the reflected signal and the generation time of the single-tone signal, so as to obtain the distance between the reflecting surface and the signal transmission point. The present invention sets the preset sliding integration time to an integer multiple of the single-tone signal half-cycle, so that the calculated propagation delay phase is independent of the amplitude of the reflected signal, thereby improving the distance measurement accuracy. The present invention can also effectively avoid the influence of the module processing delay and ambient temperature on the distance measurement result, further improving the distance measurement accuracy.

The embodiment of the invention provides a single-tone interference processing method and system, and relates to the technical field of wireless communication. The method comprises the following steps: converting symbols of a time domain into a plurality of subcarriers of a frequency domain; determining a first maximum power value of the subcarrier among the plurality of symbols so as to record the position of the subcarrier corresponding to the first maximum power value; determining an interference subcarrier in the subcarriers based on a counter, and recording the power of the interference subcarrier and the position of the interference subcarrier; and under the condition that the direct-current interference and the interference subcarrier of the transmitting end and the residual direct-current interference of the receiving end exist, processing the direct-current interference and the interference subcarrier of the transmitting end and the residual direct-current interference of the receiving end in sequence based on a preset priority. Through one embodiment of the invention, the problem of low processing efficiency of the single-tone interference in a complex scene in the related technology is at least solved, and the effect of improving the processing efficiency of the single-tone interference in the complex scene is further realized.

A single monotonic arm provided with an arm cover comprises a single monotonic arm body, the interior of a frame connecting section of the single monotonic arm body is hollowed out to form an inner cavity, a first partition plate enabling the frame connecting section to form two assembly stations is arranged in the inner cavity, and a positioning plate is arranged between the first partition plate and the frame connecting section. An arm cover covering one of the assembling stations is arranged between the positioning plate and the first partition plate, a locking assembly capable of retracting under extrusion is arranged in the arm cover, the locking assembly enters the inner cavity when the arm cover covers the assembling stations, and the locking assembly is allowed to retract to the width matched with the inner cavity through extrusion force after entering the locking assembly. Therefore, the transition fit with tightness is realized.

The invention discloses a passive Internet of Things communication method, device and equipment, a base station, a medium and a product. The method is applied to an energy storage type device powered by radio frequency, the energy storage type device is respectively connected with a cellular base station and an uplink carrier wave exciter through radio frequency communication, and by receiving an uplink single-tone carrier wave sent by the uplink carrier wave exciter, when the stored electric quantity meets a preset power-on condition, power-on is started; and generating a prompt signal according to the uplink single-tone carrier and preset prompt information, and sending the prompt signal to the cellular base station, so that the cellular base station feeds back the first instruction signal based on the prompt signal. By using the method, the cellular base station can know when the energy storage type device is powered on, so that the cellular base station only needs to send an instruction during the power-on period of the energy storage type device and does not need to continuously send a checking instruction in a high-power-consumption communication state all the time, the energy consumption is reduced, the interference to communication services of adjacent frequency bands is reduced, and the power consumption of the energy storage type device is reduced. And the global service efficiency of the cellular base station is improved.

The present disclosure provides a synchronization method involving operation at a timing source and at remote timing circuits respectively communicatively coupled to the timing source. Generating, at the timing source, a reference signal having a reference frequency; generating a multi-tone waveform; and combining the reference signal with the waveform to generate a synchronization signal having a first temporal portion, the first temporal portion comprising the reference signal without the waveform, alternating with a second temporal portion comprising the waveform. The synchronization signal is transmitted to the timing circuit through each of a plurality of signal paths having different respective propagation delays. Each of the timing circuits determines a phase difference between the received single tones to determine a propagation delay of the connected signal path. Each reference signal is individually delayed at the timing circuit based at least on the propagation delay such that the timing circuit provides phase-aligned output reference signals.

The invention relates to the acoustic imaging technology, and provides a single sound source positioning method and device, an acoustic imager and a computer storage medium, the method and device are applied to the acoustic imager, the acoustic imager comprises a microphone array, and the method comprises the following steps: obtaining a plurality of reference sound source drop points at different moments, the reference sound source drop point at each moment represents the maximum sound intensity point of sound from a plurality of sound sources acquired by the microphone array at each moment; according to the positions of all the reference sound source drop points in a preset sound intensity distribution matrix, a target area with the highest distribution density of the reference sound source drop points is determined, and each element in the preset sound intensity distribution matrix corresponds to one sound source drop point where sound can reach; and positioning the target sound source according to the sound source drop point in the target area. According to the invention, stable and reliable single sound source positioning can be realized, and the sound source visualization effect is improved.

The application discloses a musical instrument tone color conversion method based on time-frequency feature refinement, which comprises the following steps: tone color feature extraction is performed on a musical instrument audio data set to establish a target tone color feature library; according to the time domain feature of the target musical instrument tone color, base frequency adjustment, tone length modification, time domain amplitude modulation and pitch synchronous interpolation are performed on the single tone audio to be converted to realize time domain feature conversion; according to the frequency domain feature of the target musical instrument tone color, the harmonic energy ratio and the fractional harmonic energy ratio of the single tone audio after the time domain feature conversion are adjusted to realize frequency domain feature conversion; the single tone audio with the target musical instrument tone color can be converted through the time-frequency feature conversion; and tone color conversion is performed on all single tone audios of the target musical instrument. The application realizes a target musical instrument tone color conversion method capable of extracting transition tone color.

The embodiment of the invention provides a frequency offset determination method and device, a storage medium and electronic equipment, and the method comprises the steps: carrying out the frequency mixing of a first single-tone signal through employing a local oscillator signal in response to a received first single-tone signal, obtaining a first frequency mixing signal, carrying out the signal processing and sampling processing of the first frequency mixing signal, and obtaining a second frequency mixing signal; the method comprises the steps of obtaining a first single-tone signal, obtaining a first sampling signal corresponding to the first single-tone signal, carrying out specified feature point statistics on the first sampling signal to determine initial frequency offset information of the crystal oscillator, obtaining a second sampling signal, and determining the frequency offset of the crystal oscillator based on the second sampling signal and the initial frequency offset information. Through the frequency offset calibration method and device, the frequency offset calibration of the crystal oscillator is realized quickly and accurately, the problem of low efficiency caused by piece-by-piece traversal configuration of a frequency offset determination method in the related technology is solved, and the frequency offset determination efficiency is improved.

The present application relates to a kind of LFMs based on amplitude-phase response measurement timing method, belong to telemetry, radar and test measurement technical field, in the measurement method of amplitude-phase response, it is usually based on the way of single tone or double tone scanning and time-consuming is longer, and single tone cannot measure system phase response;And based on the way of multi-carrier, due to power limit, leading to the signal-to-noise ratio of each sub-carrier reduces, measurement result is poor. Again due to the related advantages of LFM signal, such as bandwidth, energy concentration and pulse compression etc., it gradually obtains application in this kind of measurement calibration system. After using the timing estimation of the present application, not only the amplitude response can be accurately measured, but also the phase response can be accurately measured. The actual measurement results show that the phase measurement curve of each time is very close to even coincide, so the idea of average noise reduction can be further used to improve the measurement accuracy of phase response.

The present invention discloses a shortwave phase-controlled synthesis phase optimization method based on a multi-tone test signal, comprising the following steps: S1) determining the number of tones to be transmitted, the tone frequency combination, and the array antenna combination used for transmission at each frequency; S2) performing single-tone synthesis transmission at each tone frequency according to the corresponding array antenna combination and a set additional phase difference combination; S3) a receiving end collecting received signals containing all transmitted tone frequencies; S4) establishing a set of equations based on the transmission configuration parameters and the energy combination of the received signal, and obtaining an estimated value of the transmission phase difference through solution; S5) modifying the additional phase difference in process S2) based on the solved transmission phase difference, and repeating process S2)-S4) until a set iteration termination condition is met. Through the above-mentioned method, the present invention is used to solve the problem of synthesis efficiency being affected by poor synthesis phase setting in shortwave phase-controlled synthesis.