43 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.

A stringed musical instrument includes a musical instrument body configured such that a string is attached thereto. The musical instrument also includes a pickup configured to detect vibration of the string and output a string vibration signal according to the vibration. The musical instrument also includes a detection sensor that is attached to the musical instrument body and configured to output a detection signal according to a force applied to the musical instrument body. The musical instrument also includes a controller that is attached to the musical instrument body, and is configured to output, based on the detection signal, a control signal configured to control an operation of an effector configured to impart an effect to the string vibration signal.

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 utility model provides a hand-held vibrating wire acquisition instrument, including vibrating wire excitation acquisition circuit, 1-WIRE bus driver, micro control unit and EEPROM memory, the 1-WIRE bus driver is connected with the micro control unit, the 1-WIRE bus driver is connected with the EEPROM memory, the vibrating wire excitation acquisition circuit is connected with a vibrating wire sensor, the vibrating wire sensor is connected with the micro control unit, the micro control unit is connected with the micro control unit, the micro control unit is connected with the micro control unit, and the EEPROM memory is connected with the micro control unit. The vibrating wire excitation acquisition circuit is connected with the micro-control unit, and the EEPROM memory is arranged in the vibrating wire sensor. According to the invention, the overall working efficiency can be improved.

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 present application provides a device and method for keeping the tension of a vibrating string unchanged during clamping and fixing, which comprises a strain tube with a string clamping device, a pressing plate, a guide block and a pressure mechanism. The string clamping device is fixed on the guide block by the pressing plate, so that the position of the string clamping device is kept relatively unchanged. The pressure mechanism is arranged opposite to the top block in the guide block, so that the string clamping device is simultaneously deformed towards the central axis by the pressure from the pressure mechanism. The position of the center of the string clamping device does not change, so that the tension of the vibrating string does not change before and after the two ends of the vibrating string are fixed. The tension stability of the vibrating string during clamping and fixing is maintained. In addition, the constant tension applied to the vibrating string by the tension providing mechanism can further improve the production consistency of the initial state of the vibrating string sensor.

The embodiment of the invention relates to the technical field of vibration wire sensor fundamental frequency signal extraction, and particularly discloses a vibration wire sensor fundamental frequency signal extraction method and system based on spectrum subtraction noise. According to the embodiment of the invention, whether the vibrating wire sensor is normal or not is judged by detecting the coil resistance of the vibrating wire sensor; when the vibrating wire sensor is normal, a first frequency spectrum amplitude sequence is calculated, and sorting processing and comparative judgment are carried out; performing PWM square wave frequency sweep excitation on the vibrating wire sensor, acquiring a second voltage amplitude sequence, performing Fourier transform, and calculating a second frequency spectrum amplitude sequence; and solving the difference between the second frequency spectrum amplitude sequence and the first frequency spectrum amplitude sequence to obtain a signal frequency spectrum amplitude sequence, estimating a fundamental frequency, identifying whether a frequency tripling signal exists, and extracting a corresponding fundamental frequency signal. Echo signals which are possibly disordered in the time domain can be displayed in the frequency domain, the anti-interference performance is achieved, and the reliability of frequency measurement of the vibrating wire sensor is further improved.

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.

A stringed instrument and a sound effect device capable of easily controlling an effect application unit even during performance of the stringed instrument are provided. The stringed instrument (10) includes an instrument main body (11), a string mounted to the instrument main body (11), a pickup (13) that detects vibration of the string and outputs a string vibration signal corresponding to the vibration, a detection sensor (14) mounted to the instrument main body (11) that outputs a detection signal corresponding to a force applied to the instrument main body (11), and a control unit (15) mounted to the instrument main body (11) that outputs a control signal that controls an action of an effect application unit (16) that applies an effect to the string vibration signal, based on the detection signal output from the detection sensor (14).

The utility model provides a handheld vibrating wire acquisition instrument, which comprises an acquisition instrument body, a Bluetooth module and a temperature sensor, the temperature sensor is arranged in a vibrating wire sensor, and the acquisition instrument body comprises a vibrating wire excitation acquisition circuit, a micro-control unit and a FLASH memory. The vibration wire excitation acquisition circuit and the FLASH memory are both connected with the micro-control unit, the temperature sensor is connected with the micro-control unit through the Bluetooth module, the vibration wire excitation acquisition circuit is connected with the vibration wire sensor, the temperature sensor is provided with an identification code of the vibration wire sensor, and the FLASH memory is connected with the micro-control unit through the Bluetooth module. And the identification code is transmitted to the micro-control unit through the Bluetooth module. According to the application, automatic calculation operation of the physical quantity can be realized, so that the overall working efficiency is improved.

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.

A magnetic pickup assembly for a stringed instrument comprises a base plate and four ferrous rails or polepiece arrays, three magnets arranged between the four rails / poles, and four pickup coils. Two sets of two rails / poles are disposed on the base plate and include an inner set and an outer set. Each rail / polepiece array has a coincident coil. The three permanent magnets are specifically provisioned and attached to the base plate. The two humbucking outputs of the pickup are connected externally in a series configuration. A passive RC network is connected to the two coil pairs in series. By provision of component values of the RC network, output frequency response to string vibrations may be controlled over a wide range. The complete design provides a variable frequency-selective string aperture feature which assists in obtaining pleasing tonality over the range of adjustment. Alternate embodiments may use active electronic circuitry.

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 invention discloses an analysis model for judging influence of in-hole foreign matters on a concrete dam normal vertical line and a positioning method. Aiming at the technical defects that an existing manual displacement resetting method is high in omission factor and cannot accurately position a foreign matter touch position and the like, a normal vertical line natural vibration frequency analysis model is established based on a string vibration theory, and the equivalent length of a vertical line is calculated by exciting the vertical line and measuring the first-order natural vibration frequency in combination with steel wire tension, linear density and a comprehensive correction coefficient. And further judging a touch state and positioning the elevation of a touch point. The method can effectively identify and position the condition that the normal vertical line is touched by the foreign matter in the vertical line hole, remarkably improves the fault identification and diagnosis capability of a vertical line monitoring system, eliminates the hidden danger of monitoring data distortion caused by the foreign matter in the hole of the vertical line monitoring system, and improves the accuracy and reliability of concrete dam vertical line monitoring data.

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

Provided is a monitoring system that makes it possible to reduce the frequency of replacement of a sensor attached to a monitored object. One example of a monitoring system according to the present invention comprises: a vibrating string sensor (8) that is attached to a monitored object comprising a water pipe line or a bridge and outputs an electric signal corresponding to the vibration of a built-in vibrating string (8g) when the vibration string (8g) is allowed to vibrate freely; and a determination unit (34b) whereby the state of the monitored object is determined on the basis of a peak frequency that is obtained by performing frequency analysis of measurement data related to the electric signal output from the vibrating string sensor (8) and is within a second frequency range not including a first frequency range including the natural frequency of the vibrating string (8g).

The application relates to a vibrating string sensor excitation control circuit, method and device, the control circuit comprising a control subcircuit, a voltage regulating circuit, a driving circuit and a power supply circuit, the control subcircuit being connected with the voltage regulating circuit and the driving circuit respectively, the voltage regulating circuit being connected with the driving circuit, the power supply circuit being used for providing power supply for the excitation control circuit, the voltage regulating circuit being used for providing positive and negative power supply voltages with adjustable voltage amplitudes according to a second control signal of the control subcircuit, the driving circuit being used for outputting an excitation signal with positive and negative voltage pulses according to a third control signal of the control subcircuit, generating opposite direction currents at different moments on a coil, generating an alternating magnetic field around the coil, forming a pushing force and a pulling force on a soft iron sheet in the magnetic field, accelerating the vibration of the vibrating string and saving energy.

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.