2439results about "Material analysis using sonic/ultrasonic/infrasonic waves" patented technology

An ultrasonic inspection robot for a threaded connection structure of a rotor internal cavity includes a main rack, a clamping module, a lifting module, a rotating module, a telescopic module and a probe buffer module. The present invention can be operated in a narrow, long and strongly restricted space, realizes the inspection of the nut that is inaccessible to the naked eye by carrying testing probes realizes the automated measurement function of placement and pressing of the carried probes, the switching between different test points, and all the points to be measured in an axial direction, and the deformation action of the device, realizes the extension and reduction of the axial and radial dimensions of the device, and completes all functions of placing and taking out the whole device. Moreover, the above functions can be realized only through one device.

The invention relates to a calibration method of an ultrasonic flaw detector calibrating device, which comprises the following steps of: acquiring and transmitting ultrasonic waves of which the frequency is matched with the theoretical frequency of a material to be detected, acquiring and dynamically correcting the actual propagation path of the ultrasonic waves in real time, generating a calibration parameter of a frequency-delay compensation coefficient, and compensating the transmitted ultrasonic waves based on the calibration parameter. After the compensated ultrasonic waves enter a to-be-detected material, time-base line signals are collected and input into the trained deviation calculation model to calculate time axis scale deviation, time-base line linearity is adjusted based on the time axis scale deviation, stepped ultrasonic attenuation signals are generated, echo signal amplitude values of the flaw detector are collected, and the amplitude values of the echo signals of the flaw detector are calculated. And comparing the echo signal amplitude value with a preset amplitude threshold value to obtain a dynamic difference value of the two, and adjusting the attenuation amount in real time based on the dynamic difference value. The problems of insufficient calibration efficiency and consistency, poor dynamic parameter adaptability, limited sensitivity calibration precision and complex working condition simulation capability in the prior art are solved.

A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.

A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.

An inspection robot positioning system includes a first position sensor configured to provide a first position value, a second position sensor configured to provide a second position value, and a controller configured to determine a position description for an inspection robot in response to the first position value and the second position value, the position description including a robot position value of the inspection robot on an inspection surface.

A method for locating an unknown arrangement of ultrasound transducer elements includes acquiring a set of raw ultrasound data using a flexible or rigid array of transducer elements, extracting a set of features from the ultrasound data, the features being derived from fundamental physics of ultrasound propagation and structural characteristics of a target object being imaged, organizing and structuring the extracted features as input for a machine learning model, and determining spatial coordinates of each ultrasound transducer element based on an output of the machine learning model.

The invention discloses ultrasonic gas concentration detection equipment, and relates to the technical field of gas concentration detection equipment. The transducer assembly comprises a piezoelectric unit and a metal coupling layer, the piezoelectric unit generates mechanical vibration by receiving electric signals, and the metal coupling layer is attached to the surface of the piezoelectric unit to transmit vibration to the gas medium in the cavity so as to generate ultrasonic waves; the converter assembly comprises a transmitting end and a receiving end, the transmitting end is connected with the metal coupling layer to transmit ultrasonic waves, and the receiving end receives the ultrasonic waves penetrating through the gas and converts the ultrasonic waves into electric signals; the disturbance part is suspended in the detection cavity, and the projection of the disturbance part covers an air flow path of the air inlet; the piezoelectric unit drives the disturbance part to generate first vibration in a plane of a non-parallel airflow direction, and the disturbance part generates second vibration which is non-collinear with the first vibration direction under the action of inlet airflow, so that multidirectional composite disturbance is formed, the gas concentration gradient in the cavity is broken, and the mixing uniformity is improved.

The invention discloses a lithium ion battery mixed slurry viscosity detection method based on lithium iron phosphate. The method comprises the steps of slurry pretreatment and parameter initialization, multi-modal data acquisition, dynamic viscosity compensation model construction, rheological property prediction, abnormality diagnosis and online feedback control. The temperature, the shearing rate, the solid content and the rheological curve of the slurry are acquired in real time through a multi-sensor fusion technology, a dynamic viscosity compensation model is constructed in combination with the characteristics of the lithium iron phosphate material, and a rheological prediction algorithm based on machine learning is introduced, so that high-precision and nondestructive online detection is realized. The influence of particle size distribution and temperature drift is eliminated through material characteristic modeling, and the measurement precision is further improved; and an ultrasonic wave and near infrared combined detection mode is adopted, so that the slurry structure is prevented from being damaged by a traditional sampling method, viscosity abnormity self-diagnosis and process parameter real-time feedback are realized, and the rejection rate is reduced.

The invention relates to the technical field of steel rail flaw detection, in particular to a flaw detection wheel detection platform. Comprising a flaw detection platform, a detection rail is arranged on the flaw detection platform in the X-axis direction, an X-axis displacement assembly, a Y-axis displacement assembly, a Z-axis displacement assembly, a horizontal transmission frame, a flaw detection mounting frame, a flaw detection mechanism, a cleaning mechanism and a touch display screen are fixedly installed on the flaw detection platform, and the horizontal transmission frame and the flaw detection mounting frame are installed on the X-axis displacement assembly. The flaw detection mechanism comprises an ultrasonic detection wheel, an eddy current sensor and a visual detector, a differential detection assembly and a pressure detection assembly are mounted on the ultrasonic detection wheel, and the pressure detection assembly comprises a ventilation pipeline, and a first pressure sensor, a pneumatic spring and a bearing seat which are arranged on two sides of the ultrasonic detection wheel. Omnibearing detection of internal, surface and near-surface defects of the steel rail is realized, a self-adaptive adjustment mechanism is provided, and the stability of the detection process is ensured; impurities on the surface of the steel rail can be cleaned comprehensively; and good surface conditions and coupling effects are provided for flaw detection.

A measurement apparatus (20) includes a controller (13) that outputs an electromagnetic wave from an electromagnetic wave output source (7) toward a sample (30) that has a first layer (31) and a second layer (32) adjacent to each other and is subjected to vibration at a predetermined vibration frequency, receives a reflected wave of the electromagnetic wave from a measurement target portion (35) at an interface between the first layer (31) and the second layer (32), calculate a frequency or an amplitude of vibration of the measurement target portion (35) based on the reflected wave, and measure an adhesive strength of the measurement target portion (35) based on the frequency or the amplitude of vibration of the measurement target portion (35) calculated based on the reflected wave.

A probe including a shell, an ultrasonic transducer unit, and at least one circuit board is provided. The ultrasonic transducer unit is disposed in the shell and includes a substrate, a vibrating membrane, and an anti-resonance structure. The vibrating membrane is disposed on the substrate and forms a cavity with the substrate. The anti-resonance structure is disposed on one side of the substrate facing away from the vibrating membrane and includes a hard layer and a glue layer connected to each other. The density of the glue layer is different from the density of the hard layer. The at least one circuit board is electrically coupled to the ultrasonic transducer unit. A method of fabricating the ultrasonic transducer unit is also provided.

Systems and methods for producing an ultrafast functional photoacoustic microscopy system are disclosed herein. Such systems are configured to enable the imaging of microvasculature and functional dynamics of tissue samples with a broad field of view and high spatial resolution. According to several disclosed embodiments, a combination of a Raman path and a polygon scanner in water immersion and air immersion environments enables rapid imaging of target materials.

A four-dimensional ultrasound imaging system, the system comprising an ultrasound main unit, a multi-channel capacitive ultrasound probe arranged in a two-dimensional area array, and an ASIC chip integrated at the probe end. The ASIC chip is internally provided with a transmitting driving circuit and a receiving circuit, which are used for driving the probe to emit ultrasound wave beams in different directions and receiving reflected echo signals. The present application comprises: the ASIC chip performing microchip beam synthesis preprocessing and reduction of the number of channels on received signals, and then transmitting the processed signals to the ultrasound main unit for beam synthesis, so as to obtain a gray value and coordinate values of each point in a beam direction; repeating the described steps until a static three-dimensional image is obtained; and continuing executing the described steps cyclically to obtain a four-dimensional ultrasound image. Integrating the ASIC chip at the probe end can achieve driving and post-processing of the multi-channel probe with fewer lead-out lines, and the subsequent imaging processing is carried out in a processor in the ultrasound main unit, thereby making the volume of processing data smaller, simplifying lead packaging, and improving the data processing efficiency.

A bi-directional photoacoustic gas sensor includes a first photoacoustic cell, where an electromagnetic radiation source emits radiation to interact with an external gas and generate pressure waves that are detected by a MEMS diaphragm. A second photoacoustic cell has an interior volume and acoustic compliance that corresponds to the interior volume and acoustic compliance of the first photoacoustic cell. Processing circuitry within a substrate uses a first acoustic signal, received by the first photoacoustic cell, and a second acoustic signal, received by the second photoacoustic cell, to determine a bi-directional response of the gas sensor to remove noise and improve the sensor's signal-to-noise ratio.

The invention relates to the technical field of bridge support detection, in particular to a bridge support detection auxiliary device which comprises a positioning unit and two symmetrical detection units. A first clinging frame and a second clinging frame are matched to enable a center shaft of a semicircular gear ring to be aligned with a center shaft of an adjacent bridge support; the winding drum is driven to rotate through the fourth motor, so that the steel wire rope is wound, the detection probe is driven to rotate by 180 degrees around the rubber support, in the rotating process, the detection probe completely detects the rubber support through ultrasonic waves, and in the whole process, workers do not need to be conveyed to the position close to a bridge support through a lifting machine; the rubber support surface detection device is simple in structure and convenient to operate, large use space of a bridge is prevented from being occupied, normal use of the bridge is not affected, the whole detection process can be completed only by a single worker, the detection difficulty is reduced, the whole rubber support surface can be detected automatically in the detection process, the detection difficulty is further reduced, and the detection time is shortened.

The utility model provides a placement type fillet weld ultrasonic phased array detection automatic scanning device. The placement type fillet weld ultrasonic phased array detection automatic scanning device comprises a fixing plate, a detection mechanism and a fixing mechanism, notches are formed in the lower ends of the fixing plates; the detection mechanism comprises four limiting gears, a gear ring, a telescopic rod and a detection probe, the four limiting gears are rotatably connected to the fixing plate around the four corners of the notch, the gear ring is meshed with the four limiting gears, the telescopic rod is connected to the gear ring, and the detection probe is arranged at the movable end of the telescopic rod; the fixing mechanism comprises a mounting frame fixedly arranged on the fixing plate, two clamping jaws movably connected to the mounting frame, two transmission rods with one ends movably connected with the two clamping jaws in a one-to-one correspondence mode, and an electric push rod movably connected with the other ends of the two transmission rods. According to the embodiment, the detection probe is driven by the gear ring to surround the to-be-detected pipeline, so that the convenience of the device is improved. And the telescopic rod adaptively stretches out and draws back to ensure the consistency of the distance between the detection probe and the welding seam and improve the detection quality of the welding seam.

A respiratory assistance apparatus configured to provide a heated and humidified gases stream, comprising: a gases inlet configured to receive a supply of gases; a blower unit configured to generate a pressurised gases stream from the supply of gases; a humidification unit configured to heat and humidify the pressurised gases stream; a gases outlet for the heated and humidified gases stream; a flow path for the gases stream through the respiratory device from the gases inlet through the blower unit and humidification unit to the gases outlet; a sensor assembly provided in the flow path before the humidification unit, the sensor assembly comprising an ultrasound gas composition sensor system for sensing one or more gas concentrations within the gases stream.

An autonomous downhole robot tool string configured for navigating and collecting information in a downhole environment comprises a sensor head having a cylindrical housing positioned at a distal end of the tool string which includes a wobbler ultrasonic transducer with a tubular structure housing an ultrasonic transducer wherein the tubular structure is tiltable about the shaft, and wherein the distal end of the sensor head is mounted for panned movement about the longitudinal axis providing two degrees of freedom for the wobbler ultrasonic transducer. First and second caliper ultrasonic transducers are positioned on the cylindrical housing facing the downhole environment, each caliper transducers is configured to pan about an axis orthogonal to the longitudinal axis of the tool string. An electronics bay section coupled to the sensor head includes electronic circuits for controlling components of the sensor head.

Downhole tools for measuring properties of a fluid include a sample chamber configured to receive the fluid, a field responsive material (“FRM”) arranged with an interface between the field responsive material and the fluid under test in the sample chamber. The field responsive material is tunable to change an acoustic impedance of the field responsive material in response to application of an applied field. A field generator is arranged in relation to the field responsive material, the field generator configured to generate and apply a field to the field responsive material. An acoustic transducer is arranged to direct acoustic energy into and through the field responsive material toward the interface between the field responsive material and the fluid and configured to detect reflections of acoustic energy that reflect from the interface.

The deep-sea mining pulp concentration and granularity measuring device comprises a main pipeline and an optical detection unit, a branch pipeline is arranged on the main pipeline, the optical detection unit comprises a light source and an image acquisition module arranged corresponding to the light source, and the light source and the image acquisition module are located on the two sides of the branch pipeline respectively; an array type ultrasonic sensor is further arranged on the main pipeline; and the image acquisition module and the array type ultrasonic sensor are connected with the control system. According to the invention, the concentration and granularity information of particles coexisting in three-phase media of tuberculosis particles, sediment particles and seawater is measured in a combined manner by adopting a plurality of measurement modes combining ultrasonic wave, light scattering and image methods, the detection accuracy is high, and the concentration (particle volume fraction) and granularity information of particles in ore pulp can be detected at the same time; the detection result is high in accuracy and the detection speed is high.

The invention discloses a detection device with a surface cleaning function for a corrosion-resistant low-carbon steel pipe, and relates to the technical field of low-carbon steel detection.The detection device comprises a workbench, a feeding device, a first inner wall cleaning device, a surface cleaning device, a conveying device, a second inner wall cleaning device, an ultrasonic detection ring and a discharging device; the feeding device conveys the low-carbon steel pipe into the conveying device, the surface cleaning device cleans the outer surface of the low-carbon steel pipe, the conveying device conveys the low-carbon steel pipe into the second inner wall cleaning device, the first inner wall cleaning device and the second inner wall cleaning device clean the steel pipe, and the cleaning efficiency is high. The conveying device conveys the low-carbon steel pipes to the discharging device, the ultrasonic detection ring detects flaws of the cleaned low-carbon steel pipes, the discharging device conveys and discharges the low-carbon steel pipes subjected to flaw detection, full-automatic feeding and discharging are achieved, the detection period is shortened, and the working efficiency is improved.

An unmanned aerial vehicle for non-destructive testing includes: an outer protective cage, a propulsion system mounted inside the outer protective cage and fixed thereto, an arm having a first end attached to the outer protective cage, and a non-destructive testing sensor mounted at a second end of the arm. The arm extends outward from the outer protective cage, the arm having a length between 1 and 50 percent of an overall linear dimension of the outer protective cage.

The invention belongs to the technical field of expressway crack detection, and discloses an expressway crack detection device and a detection method thereof.The expressway crack detection device comprises a device body, a sound wave detector host and a control box are fixedly connected to the top of the device body, and the sound wave detector host is connected with a pair of transducer probes through data lines; according to the device, through cooperation of the transverse position adjusting assembly, the scale plate and other structures, the measurement distance can be conveniently controlled, through arrangement of the adjusting mechanism, a sliding block on a linear guide rail drives a warped plate to move, the warped plate pulls a fixing frame to drive a transducer probe to move synchronously, the measurement distance is adjusted, and the measurement precision is improved. Through cooperation of the adjusting mechanism, the coupling agent supplementing assembly and other structures, the coupling agent can be supplemented in time, and the first telescopic rod pushes the limiting sleeve to drive the push rod to move up and down.

The invention relates to the technical field of pile foundation construction quality monitoring, in particular to a real-time monitoring device and method for a pouring interface of an ultra-long cast-in-situ bored pile. Comprising a monitoring probe mechanism, a tension cable, a control holder, a display industrial personal computer and an alarm, the monitoring probe mechanism is placed in a bored hole of the cast-in-place pile, and the tension cable is electrically connected with the monitoring probe mechanism and the display industrial personal computer; the display industrial personal computer is located on the ground, and the monitoring probe mechanism uploads collected data to the display industrial personal computer on the ground in real time through a tension cable; high-precision real-time monitoring of the pouring interface of the super-long cast-in-situ bored pile is achieved, and it is guaranteed that the position of the pouring interface is accurate; meanwhile, the situation that the monitoring probe is blocked and is difficult to recycle is avoided, and the adaptive capacity of the whole device is greatly improved; continuous measurement of different pouring states and stages is achieved, the real-time monitoring device can feed back position information of a pouring interface in real time, constructors can adjust a construction scheme in time, and the construction quality is ensured.

To provide a defect detecting device capable of setting a frequency appropriate for defect detection.SOLUTION: A defect detecting device (10) comprises: an input acceptance unit (161) which accepts information on a type and a size of a defect assumed to occur in an inspected object entered by a user; excitation units (11 and 12) which excite an elastic wave to the inspected object, a frequency of the elastic wave being variable; a measurement unit (15) which measures a vibrational state on a surface of the inspected object caused by the elastic wave by optical means; a wavelength determination unit (164) which calculates a wavelength of the elastic wave exited to the inspected object from the vibrational state acquired by the measurement unit; and a frequency selection unit (165) which selects an appropriate frequency from a plurality of frequencies on the basis of a wavelength acquired by the wavelength detection unit about each of the plurality of frequencies by changing a frequency of the elastic wave excited by the excitation unit and the type and size of the defect accepted by the input acceptance unit.SELECTED DRAWING: Figure 1

The invention discloses a liquid qualification detection system and method, and belongs to the technical field of intelligent detection and data analysis, multi-dimensional response signals of to-be-detected liquid under excitation of different frequencies are obtained, and a multi-dimensional response data set containing optical, acoustic, electrical and thermal physical channels is constructed; extracting a liquid component behavior characteristic spectrogram through a multi-modal characteristic fusion module; a liquid qualification judgment model is constructed based on a clustering enhanced convolutional neural network and a multi-scale attention mechanism, and classification prediction of the liquid qualification state is realized; further combining confidence coefficient calculation with historical sample database comparison, performing adaptive calibration on a prediction result, and outputting a detection result and a risk level; if the detection result is unqualified or the risk level exceeds the threshold value, an alarm mechanism is automatically triggered, and abnormal feature parameters are marked; the method has the advantages of high detection precision, high response speed, high anomaly recognition capability, excellent traceability and the like, and is suitable for scenes of liquid quality control, environment detection, biological sample analysis and the like.

A system and method for evaluating a bond is provided. The system uses an underwater spark discharge to generate a compression wave in a first vessel containing a liquid. The system further includes a second vessel in which a vacuum is pulled to hold the first vessel against a bonded structure being inspected. The compression wave is directed to propagate from the liquid into the bonded structure to apply a known force to the bond being inspected.

The utility model discloses a wheel type probe sealing mechanism which comprises a wheel shaft (5) connected with a wheel hub (1), the wheel shaft (5) is of a split type structure and comprises an upper half shaft (51) and a lower half shaft (52) which are matched with each other, the two sides of the upper half shaft (51) are respectively provided with a group of upper screw holes (51a), and the two sides of the lower half shaft (52) are respectively provided with a group of lower screw holes (52a); a cross recess screw (8) is connected in the corresponding upper screw hole (51a) and the lower screw hole (52a), the upper half shaft (51) is fixedly connected with the lower half shaft (52) through the cross recess screw (8), and a framework sealing ring (6) and an oil seal check ring (7) are arranged between the inner end of the wheel shaft (5) and the hub (1) after the upper half shaft (51) and the lower half shaft (52) are combined. The hollow shaft has the advantages that threading of the hollow shaft is facilitated, sealing performance is improved, dismounting and mounting are facilitated, and sealing and rotating are both considered.

The invention provides an ultrasonic detection device capable of controlling coupling strength and a method thereof, and belongs to the technical field of nondestructive testing, and the method comprises the following steps: device state and adjustment, ultrasonic sensor installation and position setting, a motor driving a screw rod to stretch out, pressure closed-loop control starting, and motor rotation control through a PID algorithm. And performing signal acquisition operation and device resetting. In the aspect of precision, the force can be accurately controlled in a specific range, the coupling strength is flexibly adjusted according to material characteristics, good acoustic coupling is formed, coupling layer interference is avoided, and the detection precision and the signal quality are greatly improved. The cost advantage is prominent, the hardware cost is greatly reduced, force is accurately controlled, probe abrasion is reduced, and the maintenance and replacement cost is reduced.