95 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 discloses a LoRa-based parallel backscatter communication method and system. The method comprises the following steps: transmitting a single-tone radio frequency source signal as a signal excitation source; designing a backscattering label, and performing backscattering modulation processing on the environmental perception data in combination with the signal excitation source to obtain a modulated standard LoRa data packet; and the receiver presets the center frequency of a communication link, and performs frequency band distinguishing and demodulation processing on the modulated standard LoRa data packet to complete parallel backscatter communication of the LoRa data. According to the invention, while a parallel backscattering LoRa communication system compatible with commercial LoRa equipment is realized, the throughput of the system is improved, and frequency division multiple access parallel transmission is realized. The LoRa-based parallel backscatter communication method and system can be widely applied to the technical field of parallel backscatter communication.

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 invention discloses an acoustic monitoring method, system, medium and equipment for the near stall condition of an aircraft compressor, and the method comprises the steps: carrying out the synchronous collection of sound pressure time domain signals of multiple channels of an aviation compression system; adding a rectangular window to the multi-channel sound pressure time-domain signal, and constructing an acoustic time-domain signal segment to monitor the current operation state of the aviation compression system; performing fast Fourier transform on the multichannel acoustic time domain signal segment in the current time domain window to form a plurality of sound pressure frequency spectrums, judging whether a plurality of single-tone characteristic frequencies which are non-integer multiples of the current rotation frequency exist in the sound pressure frequency spectrums or not, and constructing an orthogonal Fourier transfer matrix based on the installation position and the highest circumferential modal order, and judging whether the order difference of the characteristic acoustic mode under each characteristic frequency is the rotation frequency multiple difference of the corresponding characteristic frequency, calculating the acoustic mode amplitude corresponding to each broadband frequency component, drawing an acoustic mode spectrogram, and judging whether a mode bright band exists at the cut-off frequency boundary in the acoustic mode spectrogram.

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 method is performed by a user equipment (UE) of a plurality of UEs that receive a plurality of orthogonal cover codes (OCC) sequences for concurrently transmitting to a network node on the same time-frequency resources. The method comprises receiving an orthogonal cover codes (OCC) sequence of the plurality of OCC sequences. The plurality of OCC sequences are assigned to respective ones of the plurality of UEs. The method further comprises transmitting, through a narrowband physical uplink shared channel (NPUSCH) format 1, to the network node on the same time-frequency resources shared by other UEs of the plurality of UEs. The plurality of UEs concurrently transmitting through the narrowband physical uplink for a single-tone or multi-tone transmission having a first subcarrier spacing (SCS). Appliance of the plurality of OCC sequences is with respect to one or more OFDM symbols, one or more time-domain slots, or a time-domain resource unit.

The invention discloses a chirp signal-based timing synchronization system and method, belongs to the field of wireless communication, and can be used for large-scale timing drift compensation in a low-noise scene. The system comprises a timing error detection module, a numerical control oscillator module and an interpolation filter module which are cascaded, the timing error detection module is used for removing chirp single-tone spectrum peak positioning and timing errors, and the numerical control oscillator module is used for mapping the timing errors to stepping factors, updating phase register values and determining integer and decimal interpolation sampling points; the interpolation filter module resamples the chirp symbols by using interpolation sampling points to realize timing synchronization; the method comprises the steps of firstly initializing parameters, then calculating a timing error value of an upper chirp leading signal through a timing error detection module, then calculating a resampling parameter through a numerical control oscillator, and finally obtaining a timing synchronization result after the upper chirp signal is resampled through an interpolation filter module. According to the invention, the timing synchronization anti-noise performance and the estimation precision of the timing error value are 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.

The invention discloses a gas compressor near stall state voiceprint continuous monitoring method and system, a medium and equipment, and the method comprises the steps: randomly selecting a preset installation number of microphone measuring points at an inlet to form a microphone array, and carrying out the synchronous collection of multi-channel sound pressure time domain signals; the method comprises the following steps: adding a rectangular window to a multi-channel sound pressure time domain signal, constructing an acoustic time domain signal segment, carrying out fast Fourier transform on the multi-channel acoustic time domain signal segment in a current time domain window to form a plurality of sound pressure frequency spectrums, judging whether a plurality of asynchronous single-tone characteristic frequencies which are non-integer multiples of current rotation frequency exist in the sound pressure frequency spectrums, and if yes, judging whether the sound pressure frequency spectrums exist in the sound pressure frequency spectrums; the method comprises the following steps: constructing a multi-channel microphone continuous frequency domain observation matrix of an asynchronous single-tone characteristic frequency, constructing an orthogonal Fourier transfer matrix based on a microphone sensor installation azimuth angle and a modal highest order, and establishing a compressor near-stall characteristic modal reconstruction model under a non-uniform few-measurement-point condition; and the amplitude is solved based on a block orthogonal matching pursuit algorithm, and compressor near-stall working condition monitoring based on voiceprint features is achieved.

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.

Ultrasonic ranging systems and methods that use coding to distinguish emitted bursts from multiple transducers temporally stagger the bursts emitted from the transducers. The stagger delay between bursts from different transducers in a sensing frame can be randomized between different sensing frames to prevent blind zones. The stagger delay can be relatively small (e.g., between 3 ms and 10 ms) as compared to delays required between bursts in a single-tone ranging system (which would need to be more on the order of between 30 ms and 40 ms, depending on the maximum detecting range of the ranging system). The coding of bursts can be selected to utilize the entire bandwidth of the bursting transducer so as to preserve short-range sensitivity over transducer ringing. Schemes in which some transducers in a system only listen for bursts from other transducers but do not themselves burst within a sensing frame are also described.

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 discloses a short wave phase control synthesis phase optimization method based on a multi-tone test signal. The method comprises the following steps: S1) determining the number of single tones needing to be transmitted, a single tone frequency combination and an array antenna combination used for transmitting at each frequency; s2) performing single-tone synthesis emission on each single-tone frequency according to the corresponding array antenna combination and the set additional phase difference combination; s3) a receiving end collects a receiving signal containing all the transmitting single-tone frequencies; s4) establishing an equation set according to the emission configuration parameter and the energy combination of the received signal, and obtaining an estimated value of the transmission phase difference through calculation; and S5) modifying the additional phase difference in the process S2) according to the solved transmission phase difference, and repeating the processes S2)-S4) until a set iteration termination condition is satisfied. Through the mode, the method is used for solving the problem that the synthesis efficiency is influenced due to poor synthesis phase setting in short-wave phase control synthesis.

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.

The present invention discloses a verification method for an interference detection FPGA, which relates to the technical field of interference detection processing. The steps are as follows: Tone interference: Step 1: Tone interference 1 to tone interference N modules: The SystemVerilog language generates sine wave signals of different frequencies by setting different frequency control words. Based on the intermediate frequency signal that the FPGA can receive as the center frequency and according to the requirement of the input signal bandwidth range, the sine signal frequency is set and sent to N tone interference processing modules; Step 2: N tone interference processing modules: Select tone signals 1 to N within the input signal bandwidth range and send them to a multiplexer. The present invention solves the problem of the verification environment where third-party FPGA verification personnel do not have physical hardware conditions, solves the problem of the existence or non-existence of the verification environment, makes the soft environment verification technology a possible option, and greatly improves the verification efficiency.

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 application discloses a calibration waveform generator, a radio frequency chip calibration system, method, device, and medium, which relate to the technical field of radio frequency transceiver chips and are used to implement the calibration of zero-IF radio frequency transceiver chips. Aiming at the problem of slow calibration speed of I / Q mismatch in traditional calibration schemes, a calibration waveform generator is provided, which can achieve DCOS calibration and I / Q mismatch calibration of transceiver chips. By simultaneously generating multiple single tones with equal amplitudes to achieve multi-tone sweeping, the calibration time required for I / Q mismatch mirror calibration can be greatly shortened, thereby accelerating the startup speed of radio frequency transceiver chips and facilitating background calibration in the background without affecting services, improving the performance of broadband zero-IF transceivers.

A method and apparatus for processing a measurement signal, the method comprising: a first node (110) determining the type of a 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; the measurement refers to distance measurement, angle measurement or positioning of the measured node; the first node (110) sending the first information to the second node (120); the first information is used for indicating the type of the measurement signal; the type of the measurement signal comprises a single-tone signal or a multi-tone signal. According to the measurement signal processing method and device, the type of the measurement signal sent or received by the node can be determined, and the type of the measurement signal is indicated to the node, so that the node can realize measurement of distance measurement, angle measurement or positioning.

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.