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 grounding grid corrosion diagnostic method and device. The method comprises the steps of injecting sinusoidal alternating currents the frequency of which is not 50 Hz into a grounding grid, measuring the potential rise and reference supply bus voltage of an observation point, calculating the percentage of the reference supply bus voltage of the observation point, simulating an intact grounding grid with simulation software and calculating the percentage of the reference supply bus voltage of the observation point, obtaining the difference value between the percentage of the reference supply bus voltage of the actual observation point and the percentage of the reference supply bus voltage calculated by the simulation software, and judging whether the percentage difference value of the reference supply bus voltage of the observation point meets a preset condition. According to the grounding grid corrosion diagnostic method and device, large-area excavation of the grounding grid is not needed, huge waste of labor, material resources and financial resources is avoided, limitation of operating conditions on site is eliminated, normal operation of an electric system is guaranteed, the application prospect is wide, and market value is high.

Grounding grid corrosion diagnostic method and device

The invention provides a grounding network state detection system based on high-frequency pulse inverse scattering imaging. The detection system is arranged on the ground above a grounding network. The output end of a high-frequency pulse emitting system is connected with an emitting antenna, a plurality of receiving antennas are arranged in a signal coverage range of the emitting antenna, and a receiving array is formed. The receiving antenna is connected to the input end of an electromagnetic receiving system, and the output end of the electromagnetic receiving system is connected to the input end of a data interpretation and imaging system. High-frequency pulse signals output by the high-frequency pulse emitting system are input into the emitting antenna, the signals are directionally sent to the underground grounding network by the emitting antenna, the sent signals are spread between underground media and the grounding network, the receiving array formed by a plurality of receiving antennas receives signals containing information of the underground grounding network, the signals of the receiving antenna array are conveyed to an electromagnetic receiving system, and output signals of the electromagnetic receiving system are input to the data interpretation and imaging system to be subjected to data interpretation and image rebuilding.

Grounding network state detection system for high-frequency pulse inverse scattering imaging

Method for detecting corrosion of conductor of grounding grid of power system based on SH0 (horizontal shear) wave

A corrosion detection device of a grounding net conductor based on an SH0 wave power system belongs to the technical field of non-destructive testing. A pulse function generator passes through an excitation impedance matching apparatus to be connected with an electromagnetic acoustic excitation transducer so as to excite SH0 waves which are free of dispersion, single in modal, good in directivity and large in energy. The SH0 wave electromagnetic acoustic excitation transducer (3) and an SH0 wave electromagnetic acoustic receiving transducer (4) are arranged on the central axis in the length direction of the grounding net conductor, excitation frequency is the maximal frequency of sensor working energy, and the SH0 waves generated under the central frequency are used to conduct non-destructive testing to corrosion of the grounding net conductor. The corrosion detection device solves the problem that corrosion detection of the grounding net conductor is not perfect, detection of metal components utilizing lamb waves is inconvenient to conduct, and the lamb waves are multimodal, scattering, remarkable in bonder effects and easy in generation of modal conversion. The non-destructive testing method can conduct long-distance, quick, complete and in-service non-destructive testing and can be popularized to the non-destructive testing of corrosion of a narrow strip metal structure.

Corrosion detection device of grounding net conductor based on SH0 wave power system

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

Luo Hongjian

Papers

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

Method for detecting corrosion of conductor of grounding grid of power system based on SH0 (horizontal shear) wave

Corrosion detection device of grounding net conductor based on SH0 wave power system

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