29 results about "Vibrating string" patented technology

The invention belongs to the technical field of foundation settlement monitoring, and discloses a layered monitoring device and method for deep foundation settlement, a combined system of springs and steel strings is innovatively adopted, the measuring range and the application range of a vibrating wire type monitoring structure are expanded, and checking calculation results show that the vibrating wire type monitoring structure can meet the requirement for foundation deformation monitoring; a hard plastic anchoring plate is adopted, traditional point contact anchoring is converted into a surface bearing mode, it is ensured that the device and a soil layer are integrally solidified and synchronously settled through backfill soil pressure, mechanical transmission errors caused by indirect measurement are effectively eliminated, and the physical authenticity and precision of monitoring data are remarkably improved; the vibration excitation and vibration pick-up integrated module is used for converting tiny deformation into high-stability frequency signals with high anti-interference capacity, dependence on manual on-site reading is eliminated, and all-weather and unattended automatic real-time monitoring of foundation settlement is achieved.

The invention discloses a device and a method for measuring elastic modulus of a flexible material based on beat-longitudinal wave coupling, and belongs to the technical field of flexible material measurement, the device comprises a signal generation module, a signal acquisition and processing module and a measurement auxiliary module; the signal generation module is used for synchronously outputting two paths of sine wave signals with similar frequencies to excite the string vibration of the flexible material and converting the tuned string vibration into mechanical vibration of front and back displacement; the signal acquisition and processing module is used for analyzing the sine wave signal and the displacement information of the mechanical vibration to obtain an analysis result, and obtaining the elastic modulus of the flexible material according to the analysis result and the length and mass density of the flexible material; and the measurement auxiliary module is used for measuring the length and the mass density of the flexible material. The technical problems that the flexible material elasticity modulus measurement result sensor is high in precision requirement, and measurement cannot be visualized are solved.

The invention relates to the technical field of safety monitoring of water conservancy and hydropower engineering, in particular to a tension wire tension non-contact checking method and device based on a sound wave vibration frequency method.The tension wire tension non-contact checking method comprises the steps that a non-contact exciter emits excitation pulses to a tension wire to excite the tension wire to generate transverse vibration; collecting a vibration signal of the tension wire in a non-contact manner by using a laser vibration meter; performing fast Fourier transform on the vibration signal to obtain a vibration fundamental frequency of the vibration signal; according to a string vibration formula, in combination with pre-input tension wire length and linear density parameters, a real-time tension value of the tension wire is calculated, and the device comprises an excitation unit, a sensing unit, a main control processing unit and a display and input unit. According to the invention, absolute zero-disturbance, high-precision and rapid on-site checking of the tension of the tension wire is realized, and the problems that a traditional method needs contact measurement, disturbance is large and operation is tedious are solved.

The present application relates to the technical field of musical instrument tuning, and particularly relates to a self-learning musical instrument pitch correction device capable of eliminating environmental noise. The present application comprises an image acquisition module, a vibration feature acquisition module, a fundamental frequency acquisition module, a correction indication module and a self-learning recording module. The image acquisition module is used to collect string vibration images to physically isolate noise, the vibration feature acquisition module is used to track string displacement to generate vibration feature data, the fundamental frequency acquisition module is used to perform frequency domain transformation and interpolation on the data to obtain the actual vibration fundamental frequency, the correction indication module is used to compare with the standard pitch and output a graded color indication and a tuning direction, and the self-learning recording module is used to analyze previous deviation data to generate stability evaluation and maintenance suggestions. The present application realizes sound classification level pitch detection and correction without sound collection, and improves the tuning reliability in a noisy environment.

The invention relates to a bowed string instrument which comprises a hollow first box body, a vibrating string bearing rod arranged on the first box body and a vibrating string, a first opening is formed in the first end of the first box body, and the first opening is closed by a diaphragm. The bowed instrument includes a hollow second case disposed on a first case, the second case including a panel, a back plate, and a side frame connecting the panel and the back plate, the side frame extending along edges of the panel and the back plate and enclosing an internal volume of the second case together with the panel and the back plate. The bowed string instrument is large in volume, beautiful in timbre, sensitive in response and easy to master. Volume is sufficient in a high-pitch area, finger feeling of string pressing is sensitive, and response is rapid and direct. And the sound quality in a bass area is strong, thick and wide. And the timbre in the alto region is round and soft, has the special charm of antique and ancient fragrance, and also has an immersive sweet feeling.

The utility model relates to the technical field of vibration test equipment, and discloses a string vibration research experiment instrument, which comprises a base, an electronic vibration source mounted at one end of the upper side of the base, a string mounted at the vibration output end of the electronic vibration source, and a tension sensor mounted at the other end of the upper side of the base. Two guide rails are installed on the upper side of the base, a first sliding block and a second sliding block are slidably installed on the outer sides of the two guide rails, reflecting plates are installed on the upper sides of the first sliding block and the second sliding block respectively, and a chord line penetrates through the two reflecting plates. Compared with the prior art, the vibration source has the advantages that the frequency change range is large, the vibration frequency can be continuously and finely adjusted, and the like; the vibration frequency is directly displayed by a nixie tube, and frequency data is stable and reliable; the tension can be continuously adjusted; the device can measure the resultant force of the pulling force and the restoring force of the string, and reduces the friction force between the string and the pulley in the original device, thereby reducing the system error.

The application discloses a kind of derrick hoisting system and coal handling trestle resonance processing method, comprising: a. using optical vibration measurement method to obtain the basic frequency characteristic of derrick hoisting system or coal handling trestle, that is, string vibration natural frequency, string vibration natural frequency includes first-order natural frequency, denoted as f x1 ; b. the natural frequency of derrick hoisting system or coal handling trestle is calculated using finite element model, the natural frequency of first-order vibration, i.e. fundamental frequency is calculated;In the shutdown state of derrick hoisting system or coal handling trestle, the dynamic characteristics of building structure are tested using transient impact excitation method or natural environment excitation method, and the calculation results of the fundamental frequency of the structure are verified by experiment;And determine the natural frequency fundamental frequency interval of building structure, and c. according to =, wherein L is the length of the string, T is the tension of the string, and δ is the linear density of the string, by changing the effective length of the string in the derrick hoisting system and coal handling trestle, the natural frequency of the string is changed, so that, thus eliminating resonance.

A pickup device detects a vibration of a string of an electric string instrument. The pickup device includes a first coil wound in a first direction around a magnetic core that is configured to be disposed adjacent to the string. The pickup device further includes a second coil connected in series with the first coil, and wound in a second direction, which is different from the first direction. The pickup device further includes a third coil connected in series with the second coil, and wound in the second direction. The pickup device further includes a tuning circuit configured to adjust a magnitude of an induced electromotive force of the second coil. The first coil is configured to output a first signal representing the string vibration and any external magnetic field noise picked up by the first coil.

A universal guitar chord learning system comprising a plurality of chord cards, each having a thin, flat body configured for removable insertion between the strings and fretboard of a guitar without interfering with string vibration. The chord cards include fret-engaging notches arranged along peripheral edges, adapted to securely attach to guitar frets of varying spacings and dimensions, thereby providing universal compatibility with various guitar models. Chord identifying information and finger placement markers are disposed on the body of each chord card. In use, a selected chord card is inserted between the strings and fretboard, engaging the fret notches with the guitar frets, allowing the user to play the chord with the card in place to facilitate learning through visual and auditory modalities.

The invention discloses a self-adaptive temperature-nonlinear cooperative compensation method and system based on dual-frequency vibrating wire fusion, and the method comprises the steps: synchronously collecting a conventional frequency signal and a supplementary frequency signal of a target scene through a main vibrating wire and an auxiliary vibrating wire of a vibrating wire type displacement sensor, and recording the environment temperature, range specification and installation mode information at the same time. The method comprises the following steps: preprocessing a dual-frequency signal, extracting core characteristics such as frequency difference and ratio, constructing a temperature-nonlinear error coupling model by combining temperature and displacement values, and determining error distribution rules under different temperatures and measuring ranges; according to the measuring range, the installation mode and the real-time temperature, a compensation parameter library is called through an adaptive algorithm, and temperature and nonlinear error correction coefficients are generated. And based on the coupling model, correcting the original displacement value through double coefficients in a cooperative manner, eliminating vibration wire tension deviation and nonlinear response errors, and outputting a high-precision displacement result. And the displacement monitoring precision is improved.

The present invention relates to a universal guitar nut system that integrates multiple pickup technologies, AI-driven signal processing, sustain enhancement, and note-bending capabilities into a single modular assembly. The system captures string vibrations directly at the nut, enabling acoustic-like and electric tonal output independent of bridge pickups or body resonance. It supports piezoelectric, magnetic, optical, and future sensing technologies, providing flexible signal routing via wired or wireless outputs. AI modules analyze performance in real-time, dynamically shaping tone, sustain, and harmonic response. A piezo-actuated sustainer provides controlled string vibration for infinite sustain, while integrated note-bender functionality allows pitch modulation directly at the nut. The system is compatible with standard and Floyd Rose-equipped guitars, requiring no structural modifications, offering musicians enhanced tonal versatility, expressive control, and seamless integration with modern digital workflows.

The present invention, LYRA (Learning Your Resonance Alignment), is a resonance-based artificial intelligence (AI) system that interfaces with electric guitar hardware to enable adaptive, emotionally intelligent musical performance. LYRA captures real-time input from guitar components, including pickups, sustainers, and toggle interfaces, and analyzes this data through a resonance mapping engine and alignment detection layer to identify a user-specific vibrational and emotional profile. An expression response interface interprets gestures, string vibration, and control interactions, allowing the system to dynamically adjust audio output-including tonal, harmonic, sustain, and effect parameters-based on the musician's alignment. LYRA continuously updates its memory of the user's expressive patterns, providing real-time haptic, visual, or auditory feedback. By integrating seamlessly with existing guitar technologies, LYRA transforms instruments into co-creative partners, facilitating a human-Al musical collaboration that evolves with the performer's style and emotional intent.

To easily control an effect imparting part even during playing of a stringed instrument.SOLUTION: The stringed instrument 10 includes a musical instrument body 11, strings attached to the musical instrument body 11, a pickup 13 that detects vibration of the strings and outputs a string vibration signal corresponding to the vibration, a detection sensor 14 that is attached to the musical instrument body 11 and outputs a detection signal corresponding to a force applied to the musical instrument body 11, and a controller 15 that is attached to the musical instrument body 11 and outputs a control signal for controlling an operation of an effect imparter 16 that switches between start and stop of recording of a sound signal based on an input string vibration signal and repeatedly reproduces a recorded sound signal on the basis of the detection signal output from the detection sensor 14.SELECTED DRAWING: Figure 3

The utility model relates to a bowed string instrument which comprises a hollow first box body, a vibrating string bearing rod arranged on the first box body and a vibrating string, a first opening is formed in the first end of the first box body, and the first opening is closed by a diaphragm. The bowed instrument includes a hollow second case disposed on a first case, the second case including a panel, a back plate, and a side frame connecting the panel and the back plate, the side frame extending along edges of the panel and the back plate and enclosing an internal volume of the second case together with the panel and the back plate. The bowed string instrument is large in volume, beautiful in timbre, sensitive in response and easy to master. Volume is sufficient in a high-pitch area, finger feeling of string pressing is sensitive, and response is rapid and direct. And the sound quality in a bass area is strong, thick and wide. And the timbre in the alto region is round and soft, has the special charm of antique and ancient fragrance, and also has an immersive sweet feeling.

To provide an apparatus capable of attaching a string vibration damper to personal belongings as an ornament.SOLUTION: A string vibration damper holder holds a string vibration damper having an outer peripheral groove that is capable of sandwiching a string of a tennis racket. The string vibration damper holder includes: a silicone rubber-made annular member fittable into the outer circumferential groove of the string vibration damper; a connector connectable to the annular member at one end and connectable to another object at the other end; and an ornament member connected to the annular member. The cross-sectional shape of the annular member is a circle with a diameter of 1 mm. The circumferential length of the annular member is between 500 mm and 600 mm.SELECTED DRAWING: Figure 3

The invention discloses an electronic Chinese zither with foldable zither codes and fixed intelligent sound raising and directional sound transmission functions. The Chinese zither board is foldable, can be folded during storage or transportation and is in a traditional Chinese zither style when unfolded, the position of a zither code does not need to be adjusted, namely, the zither code is fixedly placed, each string is marked with a basic note and an intelligent sound raising note represented by the string, and playing is convenient. The sound is not directly generated by string vibration, but the vibration and pressure of the strings are sensed through the sensor installed on the zither bridge, and then the strength level is judged through the electronic technology to determine which string is operated and possible notes represented by the string are basic notes or intelligent sound raising notes. And finally, synthesizing and playing a corresponding audio according to the current tone, thereby realizing intelligent tone raising and one-key tone modification. If the directional sound transmission module is used for playing ultrasonic modulation audio, directional sound transmission can be realized. The device can tune the height without adjusting the position of the zither bridge and the tightness of the strings, and can automatically modify the tone by one key, thereby greatly reducing the playing difficulty.

A guitar sound plate for improving the sound quality of a guitar by enhancing volume and sustain. The guitar sound plate comprises a rigid plate positioned inside the body of the guitar beneath the bridge. The rigid plate includes a plurality of string apertures, each with a countersink on the underside for seating ball ends of guitar strings. The guitar strings pass through the string apertures, the bridge pin holes in the soundboard, over the saddle, and along the neck to tuning posts. Tension from the strings secures the rigid plate against the underside of the soundboard without requiring permanent modifications to the guitar. This configuration efficiently transmits string vibrations into the soundboard, enhancing tonal quality. The guitar sound plate is simple to install and remove, preserving the guitar's original configuration.

This invention relates to the field of electroacoustic musical instrument technology, specifically to an electronic guqin playing system and audio simulation method based on simulated trigger synthesis. The system includes: vibrating strings, pressing strings, and an overtone switch; determining the string height and amplitude as trigger parameters based on the vibration signal; converting the pitch parameter based on the damping position signal; and finally synthesizing and outputting simulated audio based on the trigger parameters, pitch parameter, and overtone trigger signal. Addressing the problem that the timbre of existing electronic guqins is still constrained by the characteristics of the strings themselves, this invention decouples the string triggering from the pitch control principle. The vibrating string module is only used to collect the vibration signal when the corresponding string is triggered, the pressing string module is used to collect the pressing position of the corresponding fret on the string, and the overtone part has an independent overtone switch. Finally, the processing module synthesizes the actual simulated audio for playback, achieving a higher degree of freedom in timbre synthesis and avoiding the influence of string vibration characteristics on timbre.

The invention relates to intelligent vibrating wire type sensing equipment based on 5G communication, and belongs to the technical field of vibrating wire sensors, the intelligent vibrating wire type sensing equipment comprises a mounting shell, a sensing cavity used for assembling a sensor body and a power supply cavity used for assembling a power storage module are formed in the two sides of the interior of the mounting shell respectively, a storage chamber is arranged above the mounting shell, and a refrigeration sheet is attached to the surface of the storage chamber; the electric power storage module is electrically connected with the sensor main body and the refrigeration sheet, a hollow heat conduction piece is arranged in the electric power storage module, a spiral heat conduction pipe is arranged outside the sensor main body in the length direction of the sensor main body, and the storage chamber, the heat conduction piece and the heat conduction pipe are communicated with one another and are filled with heat conduction fluid. The heat conduction piece can transfer heat generated by the power storage module to the sensor body through the heat conduction fluid, and in a high-temperature environment, the heat conduction fluid in the storage chamber flows into the heat conduction piece and the heat conduction pipe after being refrigerated by the refrigeration sheet, so that the temperature of the power storage module and the temperature of the sensor body are reduced.

The invention discloses a dual-mode excitation musical instrument intelligent timbre cooperation method and system, and the method comprises the steps: detecting the operation of a player in real time, and recognizing a current excitation mode which comprises a playing excitation mode and a blowing excitation mode; in the playing excitation mode, collecting a first type of analog signals generated by string vibration; in the playing excitation mode, collecting a second type of analog signals generated by playing airflow pressure, and synchronously detecting the operation of the air valve and the sound valve to generate pitch control parameters; based on the current excitation mode and a preset transtimbre cooperation rule, mapping the first type of analog signals, the second type of analog signals and the pitch control parameters to a specified timbre model in a target musical instrument timbre model library through a main control module; and adjusting acoustic response parameters of the timbre model in real time according to the playing dynamic characteristics. According to the invention, through a double-excitation-source dynamic fusion and intelligent cooperation mechanism, intelligent evolution of transtimbre natural fusion and playing expressive force is realized.

A guitar pick assembly for flat picking and thumb picking is disclosed. The guitar pick assembly includes a thumb ring designed for user comfort and stability, a flat guitar pick with openings for cord attachment, a cord to secure the flat guitar pick to the thumb ring for allowing positional adjustment, a choke collar to maintain the pick position a barrel stops for limiting the pick movement. The thumb ring includes a rubberized or friction-enhancing coating to reduce slippage on the user thumb, structural support to prevent rotation, and an electronic module includes an accelerometer, gyroscope, and wireless communication for tracking pick movement. The assembly allows the pick to be positioned for thumb picking or extended for flat picking, with adjustable cord lengths determining distance from the thumb ring. Additionally, the assembly includes LED indicators, a magnetic resonance system for string vibration, and a bungee cord for pitch modulation.

The invention relates to electronic stringed musical instruments. Existing electronic stringed musical instruments have a pickup that captures sound from a vibrating string; however, the disadvantage of this is that the vibrating string emits mechanical sound which cannot be controlled electronically. The aim of the invention is to create sound in a completely electronic manner but without changing the technique of playing stringed musical instruments. This is achieved in that, when playing, the performer rotates working rotating parts of sensors (2) that act as surrogate strings with one hand and blocks the paths of lasers (4) of distance sensors (3) with the fingers of the other hand, situated on a fingerboard (5). The acceleration of the rotating parts of the sensors (2) and the distance from the fingers on the fingerboard (5) to the distance sensors (3) is converted by a processor of the device into a sound that has specific characteristics.

The invention discloses a string vibration multi-modal fatigue life prediction method and system, and belongs to the technical field of structure fatigue life prediction, and the method comprises the steps: obtaining the feature data of a string structure, the curvature during multi-modal vibration, and the environment data of the environment where the string structure is located; according to the characteristic data of the chord structure and the curvature during multi-modal vibration, generating dynamic stress of structural points of the chord structure; the dynamic stress is processed through a rain flow counting method, a complete stress cycle is analyzed, and the stress cycle comprises the stress amplitude and the average stress; generating an equivalent zero average stress amplitude according to the stress amplitude and the average stress; according to the equivalent zero average stress amplitude, generating an initial fatigue damage value of the structural point of the chord structure; generating an environmental influence factor according to the environmental parameters of the environment where the chord structure is located; generating a fatigue life prediction value of the chord structure according to the initial fatigue damage value of the structural point of the chord structure and the environmental influence factor; the method has the advantage of improving the accuracy of fatigue life prediction under multi-modal vibration and complex environment conditions.

The application discloses a vibrating string sensor in-phase feedback excitation method and system, comprising the following steps: firstly, frequency measurement is performed on the sine wave signal to obtain the vibration frequency of the oscillation signal generated by the vibrating string sensor; then, a phase self-adaptive compensation algorithm is used to calculate the phase delay between the excitation signal and the oscillation signal of the vibrating string sensor caused by filtering and other reasons according to the measured vibration frequency; the sending time of the excitation signal in the next period can be determined according to the calculated phase delay; when the detection time reaches the sending time, a sine wave excitation signal with the same frequency and the same phase is generated according to the vibration frequency to excite the vibrating string sensor, so that the phase difference between the excitation signal and the sensor oscillation signal is eliminated; and the cycle is repeated, so that the oscillation amplitude of the vibrating string sensor in the detection process can be avoided from being weakened.

The invention provides an intelligent decision-making method for a fabricated station cast-in-place node maintenance scheme, which comprises the following steps of: acquiring environment and structure parameters in a field foundation pit construction stage, arranging a vibrating wire type surface strain gauge on the surface of a steel support to monitor the axial force of the steel support in real time, and calculating node stress by combining a finite element model; integrating node parameters and simulation results to generate an initial curing scheme, wherein the scheme comprises the number of curing days, concrete grading and additive types; inputting the scheme into a pre-trained deep proxy learning model to predict node bearing capacity; the method comprises the following steps of: performing iterative optimization in a decision variable space by using a particle swarm optimization algorithm by taking meeting of a safety degree threshold as a constraint and taking minimization of maintenance days and material cost as targets, and finally outputting a maintenance scheme with comprehensive optimization of safety, economy and construction period. According to the method, the transformation of the maintenance scheme from experience judgment to data driving and intelligent decision making is realized, and the construction efficiency is remarkably improved and the cost is reduced while the structure safety is guaranteed.

A pickup for converting string vibrations from a vibrating musical instrument into electrical signals has a structure the structure being unitary, flexible, and laminated and extending seamlessly from a transducer through a connector to a contact; the structure having a substrate, the substrate having an electromechanical film; the transducer being printed on the electromechanical film; the connector being printed on the electromechanical film and operatively connecting the transducer to the contact.

The invention provides a vibrating wire strain gauge data synchronous acquisition method, which comprises the following steps of: respectively installing a plurality of strain gauges needing synchronous acquisition at preset measurement positions of a structure, and respectively connecting each strain gauge to each channel of a data acquisition instrument; the acquisition parameters of each channel comprise excitation starting time T1 of the steel string, excitation ending time T2 of the steel string and a vibration data acquisition period T and Tlt; (T2-T1); carrying out vibration data acquisition work of the steel string; resampling and preprocessing the collected vibration data of the steel string to obtain synchronous strain data; and transmitting the synchronous strain data to a computer or a server through a communication interface. The technical problem of synchronous acquisition of the vibrating wire strain gauge can be effectively solved, synchronous data acquisition of the strain gauges of multiple points at different positions can be realized through resampling and hardware and software synchronization methods, the time consistency of data is ensured, and the method is suitable for solving a scene needing synchronous strain acquisition in an engineering structure.