The invention relates to a device and a method for detecting carbon fiber composite material truss bonding defects by an ultrasonic phased array. The device comprises an ultrasonic phased array detector, a control computer, an ultrasonic phased array probe, a coupling wedge block, a displacement encoder, a coupling agent and a comparison specimen, wherein the ultrasonic phased array detector is connected with the control computer; the ultrasonic phased array probe is connected with the ultrasonic phased array detector; the probe end of the ultrasonic phased array probe is fixedly arranged on the coupling wedge block; the displacement encoder is connected with the ultrasonic phased array detector; the displacement encoder is fixedly connected with the coupling wedge block. The detection method comprises the following steps of connecting the detection device; setting the detection parameters; calibrating the ultrasonic phased array detector; adjusting scanning sensitivity; implementing detection; obtaining and recording the detection data. The device and the method have the advantages that the carbon fiber composite material truss bonding part with complicated space structure is detected, the better flexibility in use is realized, and the detection efficiency and the visual degree of detection results are improved.

Device and method for detecting carbon fiber composite material truss bonding defects by ultrasonic phased array

The invention discloses an assessment device for a fillet weld of an end flange of a GIS (gas insulated switchgear) and a barrel and a lossless assessment method, aiming at solving the problem that an existing detection method cannot effectively achieve lossless assessment on the fillet weld of the end flange of the GIS and the barrel The device is characterized in that an ultrasonic probe is installed on a wedge block, both the ultrasonic probe and a encoder are connected with a scanning rack so as to run synchronously, the encoder is connected with an ultrasonic wave phased array detector through a data line, the ultrasonic probe is connected with the ultrasonic wave phased array detector through the data line, and the surface of the ultrasonic probe is coated with a coupling agent and is connected with the wedge block through bolts The assessment device can realize lossless assessment of total cross section of the structure, can detect both surface defect and interior defect, can detect both the outer fillet weld of the end flange of the GIS in service and the barrel and the inner fillet weld, and can comprehensively assess the quality of the structure

Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method

The invention discloses a corrected full-focus imaging method for anisotropy weld seam defect array detection and belongs to the field of nondestructive testing. The method comprises the steps of processing full-matrix data received by a one-dimensional linear array sensor of a phased array, taking material anisotropy into consideration, calculating out group velocity of ultrasonic waves in an anisotropy medium, then utilizing a ray tracing algorithm based on a Fermat principle to calculate out propagation time of the ultrasonic waves in the anisotropy medium and finally achieving full-focus imaging of anisotropy weld seams. The method has the advantages that weld seam anisotropy is taken into consideration, the high-operation-efficiency ray tracing method based on the Fermat principle and the full-focus imaging method are combined, the problem that general full-focus imaging has inaccuracy in locating defects in the anisotropy medium is solved, and meanwhile, detection precision of the phased array in the anisotropy medium is improved.

Corrected full-focus imaging method for anisotropy weld seam defect array detection

The invention discloses a real-time ultrasonic phased array total focusing imaging method The imaging method comprises the following steps: acquiring ultrasonic data of a target area in a full matrix capture manner by using an ultrasonic phased array probe; gridding an area range to be detected, acquiring a sonic path distance of sound waves emitted by every array element, returning to every array element, from the first point in the top left corner of grids and corresponding position information, and acquiring an index matrix; and establishing a GPU kernel function copy, and realizing real-time total focusing imaging according to the index matrix The method realizes real-time highly precise ultrasonic imaging and improves the resolution of images

Real-time ultrasonic phased array total focusing imaging method

The invention provides a defect position calculation method for detecting welding seam defects through ultrasounds. The defect position calculation method comprises the following steps: placing two multi-angle ultrasonic probes at two sides of a welding seam of a pipeline to be detected respectively, and carrying out linear scanning at an equal distance along the peripheral direction of the pipeline to be detected to acquire welding seam detection data of each path of sound ray; determining a null point of the defects and calculating a vertical distance and a horizontal distance of each pointof the defect respectively through each welding seam detection data to obtain defect positions. The position of each point of the defects is independently calculated through determining the null pointof the defects of an incident angle of the sound ray according to a linear equation of primary waves and a linear equation of secondary waves. According to the defect position calculation method provided by the invention, the problem that incident starting points and the incident angles of each path of the sound ray of the multi-angle ultrasonic probes are different is solved, and the positions and sizes of the defects in the welding beam are formed only if all the points are combined, so that the welding seam defect defection rate is higher and a result is more intuitive; the quality detection of flange and elbow welding seams is ensured, and the working efficiency and the defect detection capability are greatly improved.

Defect position calculation method for detecting welding seam defects through ultrasounds

The invention discloses a method for welding line ultrasound array full focusing imaging based on oblique incidence longitudinal waves. A present array imaging postprocessing method is only applied to processing of full matrix data collected under the situation that a phased array probe acoustic beam vertically enters a to-be-tested piece. According to the method, a wedge block is added to a phased array probe, a main acoustic beam of longitudinal waves enters a welding line of the to-be-tested piece through the wedge block; by processing the full matrix data excited and received by a phased array sensor and calculating a refraction intersection point of the acoustic beam on an interface through the wedge block based on a Snell principle, the acoustic beam propagation time of each array element reaching all imaging points is calculated, amplitudes of focus points are obtained through calculation, and then the amplitude of each focus point is focused; and finally full focusing imaging of the oblique incidence longitudinal waves is achieved. The longitudinal wave main acoustic beam in a specific direction can be generated, the defect detection effect in a welding line area and the defect recognition rate are improved; and a probe protecting effect is achieved.

Method for welding line ultrasound array full focusing imaging based on oblique incidence longitudinal waves

The utility model discloses a device for evaluating a fillet weld between an end flange of a gas-insulated enclosed combined electrical apparatus and a cylinder In a conventional detection method, the nondestructive evaluation problem of the fillet weld between a gas insulated switchgear (GIS) end flange and the cylinder cannot be effectively solved The device is characterized in that an ultrasonic probe is arranged on a wedge block; the ultrasonic probe and an encoder are connected with a scanning rack, so that the ultrasonic probe and the encoder synchronously operate; the encoder is connected with an ultrasonic phased array detector through a data line; the ultrasonic probe is connected with the ultrasonic phased array detector through a data line; a coupling agent is coated on the surface of the ultrasonic probe and is connected with the wedge block through a bolt According to the device in the utility model, all-section nondestructive evaluation of the structure can be realized, surface detects can be detected, and internal defects also can be detected Moreover, the fillet weld between the GIS end flange in service and the outer side of the cylinder can be detected, the fillet weld on the inner side also can be detected, and the quality of the structure is comprehensively evaluated

Device for evaluating fillet weld between end flange of gas-insulated enclosed combined electrical apparatus and cylinder

The invention discloses a high-voltage isolator contact finger on-line salt spray test device. The traditional salt spray test method can not consider the influence of the separation and combination actions on the contact performance of the isolator contact finger, so the test data is not accurate. The technical scheme is as follows: the salt spray test device comprises a power driving system, a power driven system and a salt spray test chamber, wherein the salt spray test chamber comprises a chamber body and a chamber cover arranged outside the chamber body; both sides of the chamber cover are respectively provided with a through hole with a bottom opening; each through hole is provided with a seal end cover which is connected with the chamber cover through a fastener in a seal mode; and each seal end cover is provided with a plastic film which is connected with a conducting rod in a seal mode. The salt spray test device disclosed by the invention comprehensively considers the influence of the separation and combination actions and salt spray environment on the contact performance of the isolator contact finger, so the gas salt spray leakage in the chamber body is effectively prevented, and the test data is accurate and reliable.

Zhang Jie

Papers

Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method

Method for welding line ultrasound array full focusing imaging based on oblique incidence longitudinal waves

Device for evaluating fillet weld between end flange of gas-insulated enclosed combined electrical apparatus and cylinder

High-voltage isolator contact finger on-line salt spray test device

Health monitoring device and method of GIS (gas insulated switchgears) tank