133 results about "Probe calibration" patented technology

The invention relates to the technical field of probe calibration, and discloses a probe calibration method and device and probe control equipment, and the method comprises the steps: calculating a vibration wavelength, and constructing a multi-probe measurement structure; synchronously acquiring a wafer surface vibration signal by using a multi-probe measurement structure, and calculating probe vibration characteristic data; acquiring a multi-measurement path electrical signal of the multi-probe measurement structure, and processing the multi-measurement path electrical signal through a baseline automatic encoder to obtain an environment temperature characteristic; calculating a signal deviation value between the measured signal and the baseline signal, and correcting the signal deviation value to obtain an electrical signal after temperature compensation; layered calibration is carried out on the probe vibration characteristic data and the electrical signal after temperature compensation to obtain a wafer electrical characteristic measurement result, so that a more comprehensive and accurate temperature compensation effect is realized, the calibration weight of each layer can be dynamically adjusted according to the probe vibration state and the temperature change degree, the calibration effect is optimized, and the measurement accuracy is improved. And the calibration method has higher environmental adaptability and robustness.

The invention belongs to the technical field of dissolved oxygen measurement, and discloses a tester verification and calibration device for measuring dissolved oxygen in water or liquid, which comprises a tester, a connecting line arranged on one side of the tester, a detection probe arranged on one end of the connecting line, a storage tank arranged on one side of the tester and located on one side of the connecting line, and a fixing frame arranged on the front side of the storage tank. A supporting block is fixedly installed on the top of one side of the fixing frame, one end of the connecting line is located at the bottom of the supporting block, a storage tank is arranged on the front side of the fixing frame, and a placing base is arranged at the bottom of the storage tank. The upper end and the lower end of the detection probe are supported and fixed, so that the stability of the detection probe is improved, the situation that when the placement position and depth of the detection probe are adjusted, the probe is placed unstably and shakes, consequently, a detection signal is unstable, and a measurement result is affected is prevented, and the accuracy and precision of calibration of the detection probe are improved conveniently.

The embodiment of the invention is suitable for the technical field of medical imaging and image calibration, and provides an ultrasonic probe calibration method and system and electronic equipment, and the method comprises the steps: receiving an ultrasonic probe pose sequence and a calibration model pose sequence; receiving an ultrasonic image sequence; performing mark point identification and straight line identification on the ultrasonic image sequence to determine a first noise image and a second noise image in the ultrasonic image sequence; after the second noise image is deleted from the ultrasonic image sequence, time calibration is carried out on the ultrasonic probe, and a rate difference value between an ultrasonic probe displacement signal and an ultrasonic image displacement signal is obtained; and after deleting the first noise image from the ultrasonic image sequence, performing spatial pose calibration on the ultrasonic probe based on the rate difference value to obtain a spatial pose calibration matrix of the ultrasonic probe. By adopting the method, the calibration precision of the ultrasonic probe and the stability of the calibration result can be improved.

The invention relates to a robot three-dimensional surface type measurement system and a parameter calibration method. The method comprises the following steps: defining a coordinate system of the measurement system; the three-dimensional surface type measuring head calibration sub-method comprises the following steps of: optimizing a sphere center coordinate of a calibration sphere in a three-dimensional surface type measuring head coordinate system, and translating a three-dimensional surface type measuring head to obtain a plurality of groups of point pairs between the three-dimensional surface type measuring head coordinate system and a robot base coordinate system; a multispectral confocal probe calibration sub-method: points on the surface of the sphere are converted to a robot end coordinate system through an optimized multispectral confocal probe conversion matrix and then are converted to a robot base coordinate system, so that accurate alignment of the multispectral confocal probe coordinate system and the robot base coordinate system is realized; and fusing the measurement data under the robot base coordinate system by adopting a combined probe data fusion algorithm. Compared with the prior art, the method has the advantages of eliminating system errors caused by installation of the combined measuring head, improving fusion precision and the like.

The invention relates to an automatic dispensing machine which comprises a dispensing machine body, supporting frames, a transverse moving mechanism, a longitudinal moving mechanism, a vertical moving mechanism, a dispensing needle and a control unit arranged on the dispensing machine body, the longitudinal moving mechanism is arranged on the dispensing machine body, and the supporting frames are arranged on the two sides of the dispensing machine body; the transverse moving mechanism is arranged on the supporting frame, the vertical moving mechanism is arranged on the transverse moving mechanism, the dispensing needle is arranged on the vertical moving mechanism, a bearing seat for bearing materials is arranged on the longitudinal moving mechanism, and a concentric centering ring point is arranged in the middle of the bearing seat; a transverse positioning device and a longitudinal positioning device are arranged on the edge of the bearing base, a calibration detection probe used for conducting positioning detection on the centering ring point, the transverse positioning device and the longitudinal positioning device is arranged on the vertical moving mechanism, and the calibration detection probe conducts calibration on the centering ring point according to detection on the centering ring point, the transverse positioning device and the longitudinal positioning device. Angle fine adjustment is carried out on deviation of the transverse moving mechanism and the longitudinal moving mechanism.

The invention discloses a partial discharge synchronous calibration device and method based on a combined high-frequency current sensor, and the method comprises the steps: respectively measuring the time shift of a low-frequency-band high-frequency current sensor and the time shift of a high-frequency-band high-frequency current sensor through a synchronous calibration device, and obtaining the time difference between the low-frequency-band high-frequency current sensor and the high-frequency-band high-frequency current sensor. Two output channels of the signal generator are respectively connected with the input of the radio frequency current probe calibration device and the input of the digital oscilloscope channel 1, the output of the radio frequency current probe calibration device is connected with the non-inductive resistor, and the output of the low-frequency-band high-frequency current sensor and the output of the high-frequency-band high-frequency current sensor are respectively connected with the input of the digital oscilloscope channel 2 in sequence. According to the method, the time shift of the low-frequency-band high-frequency current sensor and the time shift of the high-frequency-band high-frequency current sensor are obtained, the time difference of measuring the same partial discharge signal by the two types of high-frequency current sensors is eliminated, and technical support is provided for realizing cable partial discharge accurate positioning based on the combined type high-frequency current sensor.

The invention provides a five-hole probe correction method, which is used for correcting a five-hole probe in a cascade test, a left side pressure measurement hole of the corrected five-hole probe is a first hole, a central pressure measurement hole is a second hole, a right side pressure measurement hole is a third hole, a lower pressure measurement hole is a fourth hole, and an upper pressure measurement hole is a fifth hole. The correction method comprises the following steps: S1, acquiring a calibration curve of the five-hole probe, and acquiring total pressure distribution of a cascade outlet; s2, calculating to obtain a corrected pressure measurement value of the first hole and a corrected pressure measurement value of the third hole; s3, obtaining a corrected yaw angle and a corrected pitch angle by using the calibration curve; and S4, obtaining a corrected total pressure value and a corrected static pressure value by using the calibration curve. According to the invention, the problem of measurement distortion of angle measurement and pressure measurement of the probe calibration curve obtained under the condition of uniform incoming flow in wake measurement with non-uniform actual circumferential total pressure is solved, and the airflow angle in the wake of the cascade can be measured more accurately.

The invention discloses a multi-frequency electromagnetic detection signal generation method for composite material defect detection, and relates to the technical field of electromagnetic detection, and the method comprises the following steps: based on composite material structure layering, collecting response voltages of a composite material defect-free standard sample under different excitation frequencies, different structure layers and different directions; carrying out normalization processing on the response voltage, and calculating through an Ohm law to obtain an impedance characteristic curve of the composite material; finding an optimal frequency excitation point from the impedance characteristic curve, and calculating an impedance matching coefficient according to the optimal frequency excitation point; and probe calibration is carried out based on the impedance matching coefficient, and multi-frequency composite information is generated and output to an excitation coil of the excitation probe. Impedance matching of the composite material, the excitation coil and the differential coil is realized.

The invention discloses a probe calibration positioning method and a sample analyzer. The method comprises the following steps: establishing a first coordinate system according to an original point position of a probe; acquiring the coordinate deviation of the probe in the first coordinate system relative to the central position of the initial positioning ring; real coordinates of the positioning rings in the working areas in the first coordinate system are obtained according to the coordinate deviation; establishing a second coordinate system according to the real coordinates of the positioning rings in the first coordinate system; calculating the coordinate of each operation station in the working area in the second coordinate system according to the size of each working area; and converting the coordinate of each operation station in the second coordinate system into the coordinate under the first coordinate system through coordinate system conversion and a space vector algorithm, namely the calibrated coordinate of each operation station. According to the invention, calibration and accurate positioning of probe coordinates can be realized, and probe positioning errors are reduced.

A system includes a displacement-type capacitive sensor probe and at least one processor and at least one memory. The at least one memory stores instructions that, when executed by the at least one processor, cause the at least one processor to calibrate the sensor probe to a known dielectric constant of a first material, send an instruction to the sensor probe to measure a capacitive response of a composite article comprising the first material and a second material, receive the measured capacitive response from the calibrated sensor probe, determine, based on the measured capacitive response, an equivalent thickness of the first material in the composite article, and determine a percentage of the first material in the composite article based on the equivalent thickness of the first material and a thickness of the composite article.

The invention provides a probe calibration method for a multi-probe antenna measurement system, and the method comprises the steps: carrying out the measurement of a first amplitude-phase parameter of a first probe located at a target position, enabling at least one probe to move along a preset track, and further measuring a second amplitude-phase parameter of a second probe located at the target position, after amplitude-phase parameter measurement is carried out on the two probes at the same target position, accurate relative amplitude-phase data between the two probes can be obtained according to the measured first amplitude-phase parameter and the measured second amplitude-phase parameter, then accurate calibrated amplitude-phase data of the first probe and the second probe are determined and obtained, accurate calibration of the first probe and the second probe is achieved, and the accuracy of calibration of the two probes is improved. Therefore, the subsequent accurate measurement of the antenna is ensured, the accurate position of the antenna does not need to be calibrated, and errors caused by manual operation (positioning) are avoided.

The utility model relates to the technical field of rail transit, in particular to a calibration tool for a probe of trackside axle temperature online equipment. The calibration tool for the trackside axle temperature online equipment probe specifically comprises a target body, a support, a gradienter, a clamping rail and an adjusting and supporting assembly. The target body, the gradienter, the clamping rail and the adjusting supporting assembly are all connected with the support. The clamping rail and the adjusting supporting assembly are located at the two ends of the support respectively, the gradienter is located on the upper surface of the support, and the clamping rail is located on the end face, away from the gradienter, of the support. The clamping rail is erected above the rail and connected with the rail in a limiting mode. The angle calibration device has the advantages of high detection efficiency and good stability when being used for calibrating the angle of the probe.

The invention relates to a calibration device and system for rotor surface magnetic detection equipment, and belongs to the field of calibration devices.The calibration device comprises a probe calibration piece, and the probe calibration piece comprises a calibration magnet; the calibration magnet is of a cube structure, and a first through hole is formed in the bottom face of the calibration magnet. The method comprises the following steps: firstly, detecting a probe calibration piece by an authoritative detection mechanism to obtain a calibration value, installing the probe calibration piece at a fixed standard position in surface magnetic detection equipment, selecting a standard sample piece to the authoritative detection mechanism for detection to obtain a multi-point standard value of the standard sample piece, and putting the multi-point standard value into production detection. The probe is moved to the probe calibration piece at the fixed standard position to calibrate the probe and the probe positioning mechanism, and then the standard sample piece is used for multi-point calibration. The problems that an existing calibration device cannot switch between centering detection calibration and surrounding detection calibration of the rotor and the detection equipment, and the rotor is inconvenient to take and place are solved.

The invention relates to a radial shimming coil of a hollow cylindrical working area, which is characterized in that decoupling is carried out through a coupling effect of a magnetic shielding barrel and a coil magnetic field, a radial magnetic field component analytic function of the coil at any point in space is obtained through derivation based on a magnetic field superposition principle, and iterative solution is carried out by adopting a particle swarm optimization algorithm; the optimal coil design parameters meeting the target magnetic field distribution are obtained; a magnetic field with magnetic lines in a radial diverging shape and uniform size is formed in a hollow cylindrical working area and is used for magnetic compensation and probe calibration of magnetometers distributed in an annular array in the muscle magnetism and leg magnetism testing process, and the matching degree of the shimming effect and the sensitive direction of a sensor is improved.

The invention relates to the technical field of defect detection, in particular to an outer wall ultrasonic automatic detection device, a detection method and an identification method. The detection device is used for detecting the surfacing layer of the hydrogenation reactor, comprises a wall-climbing moving vehicle, an electronic control system, a probe frame, an ultrasonic coupling system, a probe device, a manual remote controller, a notebook computer and a cable, is high in automation degree and has the characteristics of multi-probe integration and high coupling stability, and a coupling system is optimized. According to the detection method, a full-automatic process from positioning, starting and multi-modal detection to real-time imaging is realized, multi-dimensional and full-coverage scanning of a detection area is realized, and various defects are effectively detected. According to the automatic identification method, intelligent identification and rechecking of defects are achieved through multi-probe calibration, color coding, image fusion and confidence degree evaluation, calibration and identification innovation is carried out, defect classification and mode identification science can be carried out, and comprehensive judgment capacity and a rechecking mechanism are achieved.

This invention proposes an ultrasonic probe calibration method, the steps of which are: constructing a calibration system; acquiring parameters of the calibration object and a first infrared tracking ball and fitting the calibration object parameters; acquiring multiple ultrasonic images and performing ellipse fitting on them; calculating the coordinates of the cone vertex in the three-dimensional image coordinate system; constructing the transformation matrix of the two infrared tracking balls; and obtaining the ultrasonic probe calibration result. The target point coordinates in the three-dimensional image coordinate system of this invention are calculated through geometric relationships, eliminating the need for a specific calibration device to establish the correspondence between the image and spatial position, and not relying on control scanning surface imaging. Compared with existing technologies, this method reduces operational difficulty and effectively improves calibration efficiency while ensuring calibration accuracy.

The application relates to a detector calibration method, a calibration device, a battery, a vehicle and a storage medium. The method comprises the following steps: collecting N particulate matter concentration information in a current environment in a preset period; determining a concentration change trend according to the N particulate matter concentration information; determining a noise value based on the concentration change trend and the N particulate matter concentration information, so that the detector can be accurately calibrated according to the noise value.

The utility model discloses a high-temperature industrial television camera probe micro-motion calibration device, and particularly relates to the technical field of industrial television camera probe calibration, which comprises a transparent protective sleeve and a camera probe body mounted in the transparent protective sleeve, and an inner rod positioned on one side of the camera probe body is arranged in the transparent protective sleeve. A positioning disc is arranged outside the inner rod, an end cover is arranged on one side of the positioning disc, a spring is arranged outside the inner rod and located between the positioning disc and the end cover in a sleeving mode, an adjusting nut is arranged on the side, located on the end cover, outside the inner rod, and a locking nut is arranged on one side of the adjusting nut. According to the utility model, front-back movement and left-right rotation fine adjustment operation can be carried out on the camera probe, and in the fine adjustment calibration process, an operator can conveniently and visually check the front-back movement distance and the left-right rotation adjustment angle of the camera probe, so that the calibration accuracy is improved.

The invention discloses a method for determining a thermal pulse moisture probe calibration formula under any heating power, and aims to solve the problems that a complete test needs to be carried out under each heating power, the workload is large and the time consumption is long in the traditional calibration, three different heating powers Q are randomly selected, a Tt-w calibration test is carried out under the three heating powers, and the thermal pulse moisture probe calibration formula under any heating power is determined. According to the method, a Tt-Q linear relation is established, a corresponding Tt value under the target heating power is calculated in combination with a calibration formula, finally, a Tt-w empirical model is predicted through fitting, calibration formula coefficients A, B and C are obtained, a Tt-w calibration formula under the target power is obtained, and the calibration formula can be rapidly determined without independent calibration for each power. According to the method, the calibration efficiency of the thermal pulse moisture probe can be effectively improved, the test cost is remarkably reduced, the calibration precision is ensured, and the method has the advantages of simplicity, convenience, high efficiency and reliability and has good accuracy and practicability.

The utility model relates to the technical field of medical equipment, and discloses an ultrasonic probe calibration device and an ultrasonic probe calibration system. The ultrasonic probe calibration device is suitable for calibrating an angle sensor in an ultrasonic probe and comprises a leveling base, the upper surface of the leveling base is suitable for horizontally and vertically placing the ultrasonic probe, and a horizontal detection device is arranged at one end of the leveling base; the leveling piece is arranged on the lower surface of the leveling base and is suitable for adjusting the leveling base to be horizontal; and the leveling cushion block is arranged on the upper surface of the leveling base and is suitable for adjusting the ultrasonic probe to be horizontal. According to the utility model, the leveling base is adjusted to be in a horizontal state by using the leveling piece and the horizontal detection device, so that the angle of the angle sensor is zero-set and calibrated by adjusting the placement state of the ultrasonic probe on the leveling base.

The invention discloses a blade reference block universal clamping tool and an eddy current nondestructive testing automatic detection method.The universal clamping tool comprises clamping blocks, fixing screws and a fixing base, the upper end face of the fixing base is provided with a plurality of clamping block insertion openings, the lower end face of the fixing base is fixed to a plane, the clamping blocks are inserted into the clamping block insertion openings, and the clamping blocks are fixed to the clamping block insertion openings; a blade tenon clamping groove is formed in the upper end face of the clamping block, a screw hole is formed in the lower end face of the clamping block, the screw hole penetrates through the groove bottom face of the blade tenon clamping groove and then is communicated with the blade tenon clamping groove, and the fixing screw is installed in the screw hole. By the adoption of the clamping tool, accurate fixing of the blade reference blocks used for probe calibration in the automatic eddy current testing process can be achieved, repeatability of probe calibration results is guaranteed, meanwhile, rapid replacement of different blade reference blocks is met, certain universality is achieved, and the working efficiency is improved. The fixing problem of different types of blade reference blocks in the automatic eddy current testing process is well solved.

The invention relates to the technical field of ionizing radiation measurement, and discloses a delayed neutron detector calibration device and method. The delayed neutron detector calibration device comprises a box body, a point neutron source and a moving assembly. An independent working cavity and an independent mounting cavity are defined by the box body. And the point neutron source is arranged in the mounting cavity. The moving assembly is arranged in the box body, the connecting end of the moving assembly extends into the working cavity, and the connecting end of the moving assembly is connected with the detector. Wherein the moving assembly is used for driving the detector to move relative to the point neutron source, so that different positions of the detector correspond to the point neutron source, and the reading of the detector is obtained so as to perform segmented calibration on the detector. According to the method and the device, the delayed neutron detector can be calibrated on site, the time of the calibration implementation process of the delayed neutron detector is shortened, and the difficulty of the calibration implementation process of the delayed neutron detector is reduced.

The utility model discloses an ultrasonic probe calibration positioning device for living body puncture, which comprises a bottom plate, a top plate and an ultrasonic probe, the bottom of the top plate is rotatably connected with a plurality of calibration plates, the top of the bottom plate is fixedly connected with a rotating mechanism, and the output end of the rotating mechanism is fixedly connected with a support for placing the ultrasonic probe. Fixing plates for fixing an ultrasonic probe are arranged on the two sides of the support respectively, a plurality of sleeves are fixedly connected to the top of the bottom plate, transmission assemblies for driving the fixing plates to move are arranged between the sleeves and the fixing plates, and a driving assembly for driving the calibration plates to turn over synchronously is arranged at the bottom of the top plate. And a linkage assembly for driving the transmission assembly to start is arranged in the top plate. And the plurality of calibration plates are respectively and quickly calibrated with one ultrasonic probe, so that the calibration accuracy can be improved.

The invention relates to the technical field of probe calibration, and discloses a flat-bottom cylindrical probe on-machine calibration method, device and equipment, and the method comprises the steps: carrying out the modeling of a to-be-calibrated flat-bottom cylindrical probe and a ring gauge, obtaining a to-be-calibrated flat-bottom cylindrical probe model and a ring gauge model, and generating a radius calibration measurement path and a length calibration measurement path; the ring gauge is arranged on the table top of a machine table, the reference cutter is used for obtaining a measurement original point, the flat-bottom cylindrical probe to be calibrated is made to run along the calibration measurement path, and a corresponding actual measurement point set is obtained; fitting all the actual measurement points in the radius actual measurement point set into a circle by using a least square method circle fitting principle, and obtaining the equivalent diameter of the calibration flat-bottom cylindrical probe based on the fitting circle center and the fitting radius; the average value of the Z-axis coordinates of all the actual measurement points in the length actual measurement point set serves as length deviation, the actual length of the flat-bottom cylindrical probe to be calibrated is compensated, and the calibrated length is obtained; and based on the equivalent diameter and the calibration length, completing calibration of the flat-bottom cylindrical probe to be calibrated.

The utility model provides a calibration device for an OTA test system and the OTA test system. The calibration device is used for calibrating a probe of an OTA test system, and comprises a horn antenna; the substrate is provided with a mounting surface for mounting the horn antenna, and the mounting surface faces the probe; the horn mouth of the horn antenna is deviated from the mounting surface; the test instrument is connected to the horn antenna and the probe and is used for calibrating the probe; the rotation driving mechanism is connected to the horn antenna and used for driving the horn antenna to rotate around the central axis of the horn mouth; wherein the central axis of the horn mouth is perpendicular to the mounting surface; the movement driving mechanism is connected to the horn antenna and is used for driving the horn antenna to move along a preset direction parallel to the mounting surface; and the control mechanism is connected to the rotation driving mechanism and the movement driving mechanism and used for controlling the rotation driving mechanism and the movement driving mechanism. According to the calibration device, the time for calibrating the probe in the calibration process can be shortened, and the purpose of improving the test efficiency is achieved.

This invention discloses a probe-based method for calibrating the tool coordinate system of an industrial robot. The method includes: first, installing a probe calibration block on the end effector of robot 1; then, using the probe calibration block to contact a fixed probe to establish the robot's user coordinate system at the center of the probe's ball head; next, removing the probe calibration block, installing the electric spindle and tool calibration block, and ensuring the tool calibration block's axis coincides with the needle-shaped grinding tool's axis; the robot holding the tool calibration block in a specific posture contacts the fixed probe to acquire robot position data, and calibrating the robot's tool coordinate system using the acquired position data and related algorithms. This invention reduces operational difficulty, improves tool coordinate system calibration accuracy, establishes a high-precision tool coordinate system calibration method, and solves the problem of low calibration accuracy in robot tool coordinate systems.

The invention belongs to the field of test fluid mechanics, and discloses a high-dynamic pneumatic probe calibration method and a calibration device thereof. The high-dynamic pneumatic probe calibration device comprises a probe supporting assembly and a two-degree-of-freedom supporting assembly, wherein the probe supporting assembly is fixed at the front end of the two-degree-of-freedom supporting assembly through a connecting plate; a servo motor is installed in the probe supporting assembly, the servo motor swings the probe at a high frequency under the stable incoming flow condition to simulate the high-dynamic flow field condition, and decoupling of the speed and the angle in the dynamic calibration process of the probe is achieved. According to the high-dynamic pneumatic probe calibration method, real-time pressure data of all pressure sensing holes of a probe serve as input, the real-time Mach number, the incidence angle and the sideslip angle of a flow field serve as output, a neural network method is adopted for modeling and data analysis, a calibration curve of probe dynamic flow field measurement is obtained, and calibration of the dynamic pneumatic probe is completed. According to the high-dynamic pneumatic probe calibration method and the calibration device thereof, the measurement precision of the pneumatic probe in a high-dynamic flow field is improved, and the high-dynamic pneumatic probe calibration method and the calibration device have engineering practical value.

The utility model belongs to the technical field of oscilloscopes, and particularly relates to an oscilloscope probe calibration device which comprises an oscilloscope body, a moving groove, a sliding groove and a positioning hole are arranged on the oscilloscope body, a roller is movably arranged in the moving groove, a sliding block is arranged in the sliding groove in a sliding mode, a horizontal contrast body is fixedly arranged on the sliding block, and the horizontal contrast body is fixedly connected with the oscilloscope body. A laser lamp is fixedly arranged on the horizontal contrast body, a bolt is movably arranged on the horizontal contrast body, and a spring is fixedly arranged on the bolt. According to the utility model, the left side of the oscilloscope is provided with the horizontal contrast body whose position can be adjusted, the horizontal contrast body can slide back and forth on the side surface of the oscilloscope through cooperation of the pulley, the moving groove, the slide block and the slide groove, and then the bolt is fixed in the positioning hole through the spring to complete fixation of the horizontal contrast body. The laser lamp on the horizontal contrast body can horizontally emit laser rays, contrast is completed through the horizontal laser rays and the waveform lines, and a user can conduct calibration more quickly and accurately when observing the waveform lines.

The invention provides a surface current probe calibration device based on a parallel plate bounded waveguide structure. The surface current probe calibration device comprises a first transition section, a parallel plate working section and a second transition section which are connected in sequence, the end, not connected with the parallel plate working section, of the first transition section is electrically connected with the vector network analyzer, the end, not connected with the parallel plate working section, of the second transition section is electrically connected with the coaxial load, and the characteristic impedance of the first transition section, the characteristic impedance of the parallel plate working section and the characteristic impedance of the second transition section are all 50 ohms. According to the surface current probe calibration device based on the parallel plate bounded waveguide structure provided by the invention, a large-area and uniformly-distributed surface current is constructed by arranging the parallel plate working section; the characteristic impedance of the working section of the parallel plate is matched with the vector network analyzer, so that the reflection of incident waves is avoided, and the calibration precision is improved; the size of the parallel plate working section is far greater than the width of the surface current probe, so that the influence of the edge effect on the calibration precision is avoided; the working section of the parallel plate is of an open waveguide structure, so that the calibration process is simple to operate.

A system for non-destructive defect detection includes a calibration block and at least two phased array probes configured to transmit and receive pulsed echo signals. The calibration block includes a base metal having a first surface opposite a second surface, a corrosion resistant alloy coupled to the first surface of the calibration block, and a manual weld overlay extending from the first surface of the calibration block to a second surface of the calibration block. A method for non-destructive defect detection includes providing a system for non-destructive defect detection and calibrating at least two phased array probes of the system for non-destructive defect detection to form at least two calibrated phased array probes.