457 results about "Vibration measurement" patented technology

The invention relates to the technical field of mechanical vibration testing, in particular to a method for testing dynamic rigidity and damping characteristics of an engine support, which comprises the following steps of: 1, simulating a boundary; step 2, double-source excitation loading is carried out; step 3, dynamic response acquisition: arranging vibration measurement points in the main shaft direction of the rigidity of the support to acquire acceleration signals in three directions, synchronously acquiring excitation force signals, and recording all the signals at a set sampling rate after anti-aliasing filtering; 4, constructing a frequency response matrix: performing time-frequency transformation on the exciting force signal and the acceleration signal, and calculating a cross-point frequency response function matrix; 5, parameter decoupling calculation is carried out, wherein parameter decoupling is achieved through cross iterative optimization; and 6, outputting parameters. Through the decoupling calculation of the low frequency band and the high frequency band, the cross iteration optimization method can effectively reduce the calculation error, improves the parameter decoupling precision, and guarantees the reliability of the test result under different frequency bands.

The invention relates to the technical field of control and adjustment, in particular to a steam turbine fault diagnosis system based on multi-parameter fusion monitoring, which is characterized in that a quantum hybrid sensing module is used for establishing a picosecond-level space-time reference through entangled photon pair distribution, and unifying a time sequence label of multi-source heterogeneous data; the hypergraph feature extraction module loads the coefficient to a vibration measurement point vertex attribute channel, dynamically calculates a heat conduction hyperedge weight according to a rotor eccentricity inversion value, aggregates temperature field, vibration spectrum and magnetic domain features in a space-time hypergraph which retains physical topology, outputs a cross-scale aligned fusion feature tensor, and outputs a vibration measurement point vertex attribute channel; generating a diagnosis feature vector to drive a multi-scale twin experience certificate; and the federation decision module triggers a load reduction instruction according to the microscopic crack cloud picture to inhibit thermal stress sudden change, and meanwhile, the feature representation precision is improved through cloud federation optimization hyperedge weight parameters. According to the method, the problem of characterization distortion caused by time sequence asynchronization and scale mismatch of heat and machine coupling data is solved.

The invention discloses a full-field-domain structure high-precision deformation and vibration measurement system based on a microwave interference radar, and the system comprises an observation configuration module which is used for obtaining radar observation parameters and completing the signal transmission and reception; the signal processing module is used for preprocessing the echo signal and constructing an interference phase matrix; the phase unwrapping module is used for generating a continuous phase sequence and calculating the displacement of a reflection point; the frequency spectrum extraction module is used for extracting the frequency component and the vibration amplitude of each reflection point; the response clustering module is used for extracting reflection point clusters with similar frequency responses and constructing a vibration distribution diagram; the modal identification module is used for generating a vibration modal feature vector and marking a difference region; and the track generation module is used for generating a dynamic deformation track diagram of the full field domain structure. According to the invention, high-precision deformation and vibration mode synchronous measurement of a complex structure under full-field-domain and non-contact conditions is realized, and the precision, efficiency and intelligent level of structure monitoring are effectively improved.

The invention provides a vibration measurement device for motor equipment, and relates to the field of vibration measurement, and the device comprises a main body support frame, and the left and right sides of the top of the main body support frame are provided with self-locking worm gears A; a mounting angle adjusting shaft is rotationally mounted on the inner side of the main body supporting frame; self-locking worms A are arranged on the left side and the right side of the mounting angle adjusting shaft; the self-locking worm A is matched and connected with the self-locking worm gear A; guide pieces are arranged on the left side and the right side of the main body supporting frame. A mounting angle adjusting part is arranged in the middle of the mounting angle adjusting shaft; the vibration testing device can test vibration of motor equipment at different installation angles and output angles, the universality and accuracy of the vibration testing result of the device are improved, and the problem that the vibration amplitude of the motor equipment is affected to a certain extent due to installation modes at different angles is solved. And a vibration measurement result obtained by only testing plane installation does not have universality.

The invention discloses a multi-medium sound field control system based on an AI algorithm, which belongs to the field of intelligence and comprises a data acquisition module, a sound field modeling module, an AI optimization control module, a self-adaptive adjustment module, a hardware execution module and the like. The data acquisition module is used for sampling and acquiring acoustic signals in air, water and a solid medium; the sound field modeling module is combined with a finite difference time domain method and a graph neural network to accurately simulate sound wave propagation; the AI optimization control module fuses near-end strategy optimization and a differential evolution algorithm to generate an optimal excitation parameter; the adaptive adjustment module is based on a model migration and contrast learning mechanism; the hardware execution module generates a controllable sound field by using a piezoelectric transducer array; and the feedback evaluation module passes back measurement data through laser vibration measurement and a microphone array to realize closed-loop correction of control parameters. The method has the advantages that high-precision sound wave modeling, intelligent control parameter optimization and dynamic self-adaptive adjustment capacity are achieved, and the real-time performance, stability and the like of sound field control in the multi-medium environment are improved.

The invention discloses a vibration measurement information enhancement method based on fusion data, and relates to the technical field of vibration measurement information enhancement. Edge nodes splice reasoning probability, frozen layer activation statistics, weak spectrum gradient direction and frozen layer gradient variance to generate a multi-source confidence tensor, and a heat peak list is formed through adaptive time-frequency kernel mapping; the information is uploaded after being subjected to redundancy elimination screening; a central node distributes domain credibility to each domain and then constructs a global heat map by adopting self-attention weight fusion heat peaks, and links hierarchy, frequency bands, links and working condition nodes in a mechanism attribution map network to calculate a causal path; and an attribution result triggers a strategy rule engine to select a corresponding maintenance script or a network self-checking instruction, and the maintenance script or the network self-checking instruction is pushed to a monitoring large screen, a mobile terminal and a mail in a unified message packet format along with a global heat map and a reason link, so that display and explanation of weak fault abnormity and operation and maintenance instruction closed loop are completed.

The invention provides an equipment vibration measurement device based on machine vision and a laser radar. The equipment vibration measurement device comprises a collaborative sensing system, a visual vibration inversion module, a multi-modal feature fusion and fault knowledge base module and an edge end lightweight intelligent diagnosis module. The collaborative sensing system is used for collecting a video stream of a target area and providing an absolute displacement reference; the visual vibration inversion module is used for processing the video stream to generate a vibration spectrogram; the multi-modal feature fusion and fault knowledge base module is used for constructing a multi-dimensional feature vector and a feature knowledge base; and the edge end lightweight intelligent diagnosis module is used for identifying a fault type and outputting a diagnosis result and confidence. According to the invention, non-contact, high-precision and full-automatic vibration state sensing and fault diagnosis are realized, the core target is to completely get rid of the dependence on a contact sensor, the limitation of a pure vision scheme in a complex industrial environment is overcome, and finally millisecond-level real-time fault identification and early warning are realized on the edge side with limited resources.

A method for determining variables influencing a total zero point error of a Coriolis mass flow meter comprises: exciting a vibration of a bending vibration mode; measuring a first total zero point error T at a flow of zero; ascertaining a first damping value D of the vibration of the bending vibration mode; measuring an exciter-independent zero point error I during a decaying vibration of the bending vibration mode at a flow of zero; ascertaining a first exciter-dependent contribution E to the first total zero point error T based on the first total zero point error T and based on the exciter-independent zero point error I; and ascertaining a sensitivity factor S for the bending vibration mode based on the first exciter-dependent contribution E to the total zero point error T and based on the first damping value D.

Systems and methods for predicting anomalies in a wheel system of a semi-trailer truck. One example system includes: a vibration sensor positioned to sense vibrations of the wheel system and an electronic processor communicatively coupled to the vibration sensor. The electronic processor is configured to determine a velocity profile of the semi-trailer truck; obtain a vibration measurement; determine, from the vibration measurement, a classified vibration level; determine whether the classified vibration level is indicative of an anomaly; identify, based on whether the classified vibration level is indicative of the anomaly and both the velocity profile and a reference classified vibration level, an anomaly existing within either or both of the semi-trailer truck wheel system or the road; and perform a mitigation action in response to identifying the anomaly.

The invention discloses a dynamic calibration device and method for a visual vibration measurement system, the device comprises a dynamic standard vibration source, a calibration target, a laser Doppler interferometer, a data processing unit and a control unit, the dynamic standard vibration source outputs steady state, transient state and random vibration signals, the calibration target is fixed at the vibration output end of the dynamic standard vibration source, and the laser Doppler interferometer is fixed at the vibration output end of the dynamic standard vibration source. An acquisition target is provided for a calibration process; the calibrated visual vibration measurement system collects a dynamic image to obtain a vibration measurement parameter, and the laser Doppler interferometer synchronously obtains a standard vibration dynamic parameter; the data processing unit receives the dynamic vibration measurement parameters and the dynamic standard vibration parameters, and quantifies dynamic amplitude deviation, frequency tracking delay and phase difference; and the control unit generates calibration parameters of the calibrated visual vibration measurement system according to the type of the dynamic error under the condition that the dynamic error exceeds an error threshold value. According to the invention, quantitative evaluation and automatic calibration of the dynamic error can be realized, and the calibration precision and efficiency are improved.

The invention relates to a cylindrical shell structure vibration measuring point optimizing and monitoring method, device, equipment and medium, and relates to the technical field of cylindrical shell structure monitoring. The method comprises the steps that a simulation model of a cylindrical shell structure is established, and a plurality of response points are arranged on the surface of a shell; then constructing a modal shape matrix; calculating a contribution matrix based on the modal shape matrix, and calculating an acceleration response matrix; the vibration amplitude of each response point under the fault correlation frequency is extracted, and a fault acceleration response matrix is obtained through normalization processing; constructing a comprehensive vibration energy index based on the acceleration response matrix and the fault acceleration response matrix; carrying out weighted fusion on the contribution matrix and the comprehensive vibration energy index, and constructing a multi-target game model; solving based on a modal observability index and a vibration characterization capability index to obtain an optimal weight; and determining an optimal sensor arrangement scheme of the cylindrical shell structure based on the optimal weight. According to the invention, multiple monitoring targets can be met cooperatively.

The invention discloses an ultrasonic welding quality online detection system and method, and belongs to the technical field of laser non-contact measurement. According to the invention, the laser vibration measurement probe is rigidly coupled to the welding head to construct a follow-up-common-optical-path measurement unit, so that synchronous acquisition of vibration signals with zero mass loading is realized; further extracting an attenuation section after welding is finished from the signal, and inverting an equivalent modal damping ratio representing an interface energy dissipation state based on an exponential attenuation model; meanwhile, multi-dimensional physical indexes such as an energy transfer efficiency index Itrans and an input stability index Iin are calculated, and in combination with an energy absorption state index, collaborative fusion is carried out through a weighted fusion formula to obtain a comprehensive quality score; and finally, realizing quality attenuation early warning based on time sequence trend analysis of a scoring sequence. On-line sensing of the deep dynamic state in the welding process is achieved, the early defect recognition sensitivity and the system anti-interference capacity are remarkably improved, and the predictive maintenance capacity of quality degradation is achieved.

The invention discloses an acoustic excitation digital modulation noise reduction method and system for laser acoustic vibration detection and application. Comprising the following steps: step 1, acquiring single-point measurement time sequence parameters of laser vibration measurement equipment, step 2, measuring response characteristics of an audio excitation device, and determining pre-stabilization time required by an audio excitation signal from starting to reaching a stable amplitude; step 3, constructing an on-off keying modulation function, generating a digital gating function according to the time sequence parameter and the pre-stabilization time, and performing time domain multiplication on the audio excitation signal and the digital gating function to generate a modulated intermittent audio excitation signal; and 4, controlling the audio excitation device to play intermittent audio excitation signals, and synchronously triggering the laser vibration measurement equipment to scan and collect the measurement points on the surface of the object to be measured according to the time sequence parameters. Through the on-off keying digital modulation technology, audio excitation can be started only in the effective detection time period of laser vibration measurement, and therefore the average noise level and equipment power consumption are remarkably reduced.

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power plant vibration measurement method and device based on a dynamic range technology. Comprising the following steps: sampling vibration signals after gain amplification by using a plurality of analog-to-digital converters with different measuring ranges to obtain an initial digital sequence; the initial digital sequence comprises a signal amplitude; performing amplitude region division on the initial digital sequence according to the magnitude of the signal amplitude to obtain a plurality of signal segments in different amplitude regions, and endowing the analog-to-digital converter with a target weight according to the saturation of the signal segments in the measuring range of each analog-to-digital converter; the saturation is the ratio of the signal amplitude to the upper limit of the measuring range of the analog-to-digital converter; the target weight comprises sub-weights respectively corresponding to a plurality of different signal segments of the analog-to-digital converter; and performing weighted fusion and splicing on the signal segments based on the sub-weights of the analog-to-digital converters in the different signal segments to obtain a target sampling signal.

The invention discloses a cold atom interference type low-frequency vibration measurement device and a measurement method, and solves the problems that the existing cold atom interference gravimeter measurement equipment is limited by the performance of a vibration sensor, the compensation precision is insufficient, timing calibration is needed, and the measurement precision is low. And measurement errors generated by gravity and ultralow-frequency vibration cannot be effectively separated from a measurement result of the cold atom interference gravimeter, namely, decoupling of two measurement parameters is realized, and cold atom interference measurement of low-frequency vibration is realized. The measuring device comprises a Raman laser output system, a vacuum cavity, a sensitive axis converter and a vibration detection reflecting mirror, the Raman laser output system outputs two pieces of Raman laser which have the same polarization state and are both circular polarization states; the low-frequency vibration is transmitted to the liquid crystal phase modulator through the vacuum cavity for polarization state conversion, and then is reflected to the liquid crystal phase modulator or the vibration detection reflector through the polarization splitting prism, so that the interference type low-frequency vibration of the cold atoms is measured, and decoupling of the two is realized.

The invention relates to a distributed optical fiber micro-seismic sensing device and a tunnel monitoring method, and belongs to the technical field of micro-seismic monitoring, the distributed optical fiber micro-seismic sensing device comprises a plurality of vibration measurement sensitization assemblies installed on the same tunnel section, and the plurality of vibration measurement sensitization assemblies are connected through distributed sensing optical cables; distributed sensing optical cables in the vibration measurement sensitization assembly are arranged in the radial direction of the tunnel and used for monitoring vibration signals of hidden and micro crack development of surrounding rock near the tunnel face in the radial direction. During monitoring, the vibration measurement sensibilization assembly at the head end or the tail end of the distributed optical fiber microseismic sensing device is sequentially connected with the distributed optical fiber demodulator, the monitoring host and the monitoring center to form a microseismic sensing monitoring network. The method for monitoring the tunnel by adopting the distributed optical fiber micro-seismic sensing device can realize the axial and radial sensing of the vibration signal, and overcomes the defect that the distributed sensing optical fiber is only sensitive to the axial vibration signal but not sensitive to the radial vibration signal.

The invention belongs to the technical field of laser vibration measurement, and provides a self-focusing laser Doppler vibration measurement method and system capable of resisting self-vibration of an optical fiber, and the method comprises the steps: adding a compensation light path which is used for sensing and generating reference light which is equal to an interference signal in amplitude and is opposite to the interference signal in real time in a Doppler vibration measurement light path, and taking the minimum mean square error as a self-adaptive matching criterion; interference phases obtained by synchronous demodulation of the compensation light path and the main light path are subjected to adaptive matching and cancellation in amplitude and phase dimensions, residual errors of vibration of the vibration measurement system and other environmental interferences are suppressed below noise of the vibration measurement system, and the purpose of balancing and weakening optical fiber vibration interferences in an instrument is achieved. The influence of the vibration factor of the instrument is reduced, and the interference influence is accurately eliminated through amplitude and phase matching by a demodulation algorithm corresponding to a compensation light path; meanwhile, by dynamically observing and updating the return light intensity threshold, low-frequency disturbance is resisted, and accurate automatic focusing is achieved.

Systems and methods for predicting wheel system anomalies of a semitrailer truck. One example system includes a vibration sensor positioned to sense vibration of a wheel system and an electronic processor communicatively coupled to the vibration sensor. The electronic processor is configured to determine a speed profile of the semitrailer truck; obtaining a vibration measurement; determining classified vibration levels from the vibration measurements; determining whether the classified vibration level indicates an anomaly; identifying an anomaly present in one or both of a wheel system or a road of the semitrailer truck based on whether the classified vibration level is indicative of an anomaly and both the speed profile and the reference classified vibration level; and perform a mitigation action in response to identifying the anomaly.

The invention provides a fiber laser interference vibration measurement method and device, and relates to the technical field of fiber laser interference vibration measurement. The laser is divided into reference light and measuring light through the 1 * 2 coupler, the measuring light is divided into multiple paths through the 1 * N coupler, the multiple paths of light are irradiated to the same measuring point from multiple directions through the circulator and the collimation / focusing optical element, a redundant light return channel is constructed, and the light return success rate and interference stability under a rough surface or a curved surface or a diffuse reflection surface are effectively improved. The return light and the reference light are superposed in the interference unit to form interference fringe signals, high-precision vibration displacement data are extracted through signal detection and three-phase demodulation, and the method is suitable for non-contact vibration measurement scenes which are low in cost and easy to deploy.

A hard disk drive suspension includes first piezoelectric elements provided at a first position, and second piezoelectric elements provided at a second position. A conductor is connected to the first piezoelectric elements. Conductors are connected to the second piezoelectric elements, respectively. A measurement device includes a vibration signal generation unit which supplies vibration signals to the second piezoelectric elements, a vibration measurement unit which detects vibration generated at the suspension, and a ground connection unit. The conductor electrically connected to the first piezoelectric elements is connected to a ground via a resistor of a ground connection unit.

The invention relates to the field of rotor blade non-contact state monitoring, in particular to a blade tip timing vibration measurement signal parameter identification method and system under a time-varying rotating speed. Comprising the following steps: constructing a matrix Chirp signal model; performing initial frequency pre-analysis based on a block orthogonal matching pursuit method to obtain an estimated value; defining a range interval of initial frequency analysis and an analysis range of a frequency modulation slope by taking the estimated value as a center, and obtaining an orthogonal matching pursuit result based on a matrix Chirp signal model and a block orthogonal matching pursuit method; and according to a matching tracking result, calculating to obtain a vibration amplitude. According to the method, the frequency modulation slope is introduced to serve as an additional parameter, the change trend of the frequency along with time is reflected, the vibration rule of the blade under the centrifugal stiffening effect can be more truly described, and an accurate physical basis is provided for analysis of non-stationary signals.

The invention discloses a monitoring system and method for determining an abnormal geologic body based on distributed optical fiber sound wave vibration, and relates to the technical field of distributed optical fiber sound wave detection.The monitoring system comprises a distributed optical fiber sensing unit, a signal excitation unit, a photoelectric demodulation unit, a signal processing and analyzing unit, a result recording and outputting unit and the like; the distributed optical fiber is used for continuously collecting stratum vibration response; the signal excitation unit applies controllable disturbance to a known reference position to induce a potential abnormal geologic body to generate an inactive excitation response signal; the photoelectric demodulation unit performs phase demodulation on backscattered light transmitted back by the optical fiber to form distributed vibration measurement data; and the signal processing and analyzing unit is used for filtering and denoising the data, establishing a quantitative mathematical model of a signal incident angle and signal intensity, solving an epicentral distance and an incident angle and calculating the spatial position of an abnormal geologic body by combining propagation attenuation correction and least square inversion, and is suitable for dangerous section identification and avoidance decision before mining and construction.

The invention discloses a multi-modal data intelligent inspection method and device applied to an inspection robot. The method comprises the steps that real-time environment information in the current environment is collected, and an inspection route of a target robot is generated according to the real-time environment information; based on the inspection route, the target robot is controlled to execute data acquisition operation in the current environment according to the inspection route, vibration measurement operation parameters of the laser vibration meter can be determined, the laser vibration meter is controlled to execute corresponding signal sending and receiving operation, equipment vibration data is obtained through measurement, and then target multi-modal data is generated; and according to the target multi-modal data, the target multi-modal data can be combined with the intelligent management and control platform to execute data docking operation, so that a target inspection result of the current environment is generated. Visibly, the current environment and the equipment in the environment can be inspected through collection and analysis of the multi-modal data, the intelligence of the inspection robot in inspection operation execution is improved, and the accuracy of the inspection result is improved.

The invention discloses a stay cable force identification method, system and device and a medium, and relates to the field of structural vibration measurement, and the method comprises the steps: collecting a vibration image sequence and a key point coordinate set of a target stay cable; determining a vibration frequency set based on the vibration image sequence, acquisition parameters of preset acquisition equipment and a preset spatial distance; determining a geometric parameter set based on the key point coordinate set and the length of the target stay cable; splicing the vibration frequency set and the geometric parameter set to obtain a combined vector; inputting a preset cable force into a preset digital twinborn model to obtain a theoretical combination vector, and calculating a double-domain residual error between the theoretical combination vector and the combination vector; and iterating the preset cable force and repeating the step until a minimum double-domain residual error is obtained, and taking the preset cable force corresponding to the minimum double-domain residual error as the cable force of the target stay cable. The method aims at solving the problems that an existing stay cable force identification method is poor in reliability and low in implementation convenience.

A measuring transducer includes: a transducer module including a housing and a coil within and connected with the housing; and, set in the transducer module, a transducer module including a tube and a magnet secured on a middle segment of the tube. The tube wall is so formed that a directrix of a channel surface of the middle segment extends outside a first reference plane of the measuring transducer defined by first and fourth reference axes, and the magnet is secured on the middle segment such that a second reference plane of the measuring transducer defined by second and fourth reference axes is parallel to a third reference plane defined by third and fifth reference axes or that the second and third reference planes intersect one another to form an angle of intersection of no more than 1°.

The invention relates to a phase adaptive dynamic calibration compensation method and system based on temperature drift compensation, belongs to the technical field of vibration testing, and solves the problems of poor wide temperature precision of micro-vibration phase calibration, weak multi-frequency adaptation, incomplete full-link compensation, calibration acquisition conflict and fast aging failure in the prior art. The method comprises the following steps: determining an original calibration signal based on an analysis frequency, calculating an initial phase difference according to the original calibration signal, determining a first time compensation amount according to the initial phase difference, and carrying out first calibration compensation; acquiring environment temperature, and establishing a phase compensation model based on the environment temperature, the analysis frequency and the initial phase difference; obtaining the node temperature of the signal transmission link, determining a second time compensation amount by using the phase compensation model, and carrying out second calibration compensation; the information transmission link comprises a plurality of signal transmission nodes. According to the invention, wide temperature range, stable full-link calibration, parallel calibration and acquisition, and adaptive dynamic calibration compensation are realized, so that the micro-vibration measurement accuracy is improved.

The present invention belongs to the field of non-contact measurement of aircraft status. Conventional vibration sensors cannot realize the overall measurement of the aircraft shell, and ordinary visual cameras cannot overcome the influence of jitter when measuring the vibration of the aircraft shell. The present invention provides an aircraft shell vibration visual measurement device and method, which collects three-axis vibration information of the aircraft body and the visual camera and the aircraft shell image information, calculates the three-axis vibration differential displacement of the aircraft body and the visual camera, calculates the two-dimensional offset of the aircraft shell image information collected by the visual camera based on the obtained three-axis vibration differential displacement, re-translates and calibrates the aircraft shell image information based on the offset, and calculates the aircraft shell vibration information based on the change of specific pixel position in the calibrated aircraft shell image information. The present invention uses a dual vibration sensor mode to construct a vibration differential model to solve the problem of aircraft shell vibration measurement based on a visual camera under non-same frequency resonance conditions.

The invention discloses an optical detection system and method, and belongs to the technical field of optical non-contact measurement. According to the invention, a low-coherence wide-spectrum light source is adopted, a dispersion element and an array detector are combined to separate a wide spectrum in space so as to construct a plurality of parallel independent wavelength measurement channels, and meanwhile, an envelope extraction algorithm based on empirical mode decomposition, Hilbert transform and window length adaptive Savitzky-Golay filtering is integrated; real-time quality evaluation and dynamic weighted fusion are carried out on each channel signal, vibration measurement continuity and stability in a severe speckle environment are remarkably improved, high-dimension wavelength diversity is realized at low cost, real-time quality evaluation and weighted fusion are carried out through a self-adaptive envelope extraction algorithm, and the accuracy of vibration measurement is improved. And finally, a vibration measurement value of which the signal-to-noise ratio and the measurement precision are remarkably improved is output.

The invention relates to a pneumatic membrane structure fluid-structure interaction multi-physics field synchronous test method, which relates to the technical field of vibration measurement, and comprises the following steps: conformally embedding a flexible capacitive sensor array in the surface of a pneumatic membrane structure, detecting mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement through capacitance value change (electrical characteristics), and measuring the displacement of the flexible capacitive sensor array; and the capacitance value change rate delta C / C and the displacement delta x are in a linear proportional relationship. According to the pneumatic membrane structure fluid-solid coupling multi-physics field synchronous test method, a flexible capacitive sensor array is conformally embedded in the surface of a pneumatic membrane structure, and mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement is directly detected by using capacitance value changes; wherein the linear proportional relation between the capacitance value change rate delta C / C and the displacement delta x is directly determined by the electrode distance and the dielectric constant of the capacitive sensor, so that the physical directness of vibration wave measurement is realized, the error caused by indirect calculation depending on a traditional strain gauge or an optical method is avoided, and the vibration wave displacement measurement precision is remarkably improved to + / -0.5% full scale.

A measuring system includes a vibration-type transducer and electrically coupled measuring system electronics unit for controlling the transducer and evaluating vibration measurement signals provided by the transducer. The exciter arrangement has a vibration exciter which is positioned and aligned such that a drive offset is no more than 0.5% of the tube length. The measuring system electronics are configured to supply electrical power to the vibration exciter by means of an electrical drive signal having a temporally variable electrical current and to provide the drive signal at least intermittently with a sinusoidal second useful current having a second AC frequency, in order to monitor a quality of the measured substance based upon a corresponding second useful signal component of at least one of the vibration measurement signals.