31results about How to "Accurate defect location" patented technology

A failure detection method and device are used for detecting defects on a conductor. The method comprises the following steps: arranging at least two output ends with equal electric potentials on the conductor to be detected; inputting constant detection current to the detection points arranged on the conductor to be detected along the preset path in sequence; detecting the output current of each output end; establishing the correspondence between the output current of the output ends and the positions of the detection points based on the position information of each detection point and the output current information of each output end; and judging whether the detection points have defects according to the correspondence. The method can accurately locate the defects and use charged particle beams as the detection current sources to avoid dimension limit of the irradiation points, thus meeting the requirement of small-dimension failure analysis.

The present invention relates to the field of inner detection on oil gas pipelines, and discloses a mileage and geospatial coordinates fitting method for pipeline body data so as to solve the technical problem that pipeline direction can not be accurately calibrated and defects can not be accurately positioned in the prior art. The method comprises: establishing an alignment database of a pipeline; after establishing the alignment database, separately adding a detection result with an inner detection mileage and an aligned data object into the alignment database; performing hard spot alignment on data objects contained in the alignment database; performing data segmentation and tension calibration; and after the hard spot alignment, implementing defect alignment of weld joints of the pipeline. The technical effect of not only accurately calibrating the pipeline direction, but also accurately positioning the defect can be achieved.

The invention discloses a new energy lithium battery surface defect detection method based on adaptive deep learning. The method comprises the following steps: carrying out nonlinear mapping on a lithium battery surface grayscale image; transforming the decoupled irradiation component and reflection component to a frequency domain; performing filtering, inverse Fourier transform and exponential transform on the frequency domain data to obtain a reconstructed lithium battery image; based on morphological processing and background differencing, enhancing gray scale response at the defect; carrying out image segmentation and connected domain analysis and screening processing, and taking a result as a labeled image; designing an operator to simulate illumination details, and carrying out sample enhancement operation on the surface grayscale image of the lithium battery; training a deep convolutional neural network based on the enhanced sample image set and the labeled image; and achievinglithium battery surface defect detection based on the trained network. By utilizing the method, the detection efficiency can be improved and the false detection rate can be reduced in a lithium battery surface defect detection scene.

The invention aims at providing a post insulator flaw inspection device and a usage method thereof. The post insulator inspection device is mainly used for reducing the possibility of post insulator damage in inspection, can improve the inspection efficiency and also can be used by being mutually matched with equipment in the prior art. For achieving the purposes, the post insulator inspection device comprises three functional parts including a bearing structure, a lifting structure and a rotating structure; the bearing structure adopts a framework enclosed by two underframe transverse guards and underframe vertical guards; the lifting structure is installed on the underframe transverse guards and comprises screw rods which penetrate through the underframe transverse guards and are in threaded connection with the underframe transverse guards, the bottoms of the screw rods are fixed on supporting strips, and the tops of the screw rods are provided with rotating hand wheels; the rotating structure comprises a rotating structure body and a guiding structure body. Through the arrangement, the post insulator inspection device has the advantages of being capable of being mutually matched with the various inspection equipment in the prior art and achieving inspection under various severe environments.

The invention relates to a synchronous control system for digital rays of a circular welding seam on a pipe. In the system provided by the invention, a crawling track is fixed on the pipe from one side of the welding seam; a scanner with a ray detector is driven by a servo motor to scan along the welding seam; a magnetic induction synchronous control device is arranged outside the pipe; a magnetic induction receiver and a constant potential X ray machine which are installed on a crawler are arranged in the pipe; an industrial personnel computer is connected with a magnetic induction emitter through RS232; the magnetic induction emitter is connected with the magnetic induction receiver by emitting electromagnetic field signals and sends an exposure starting and exposure stopping command toa ray source controller PLC (Programmable Logic Controller) in the pipe; the industrial personnel computer is connected with a servo driver through an RS232 communication line; the servo driver connected with an encoder is connected with a direct current servo motor; a direct current power supply is connected with the servo driver, the direct current servo motor and the encoder and supplies electricity to the servo driver, the direct current servo motor and the encoder; one output of the PLC is connected with the input of a power supply controller; the output of the power supply controller isconnected with a ray pipe; and simultaneously, the output of the PLC is connected with the ray pipe.

The invention aims at providing a post insulator flaw inspection device and a usage method thereof. The post insulator inspection device is mainly used for reducing the possibility of post insulator damage in inspection, can improve the inspection efficiency and also can be used by being mutually matched with equipment in the prior art. For achieving the purposes, the post insulator inspection device comprises three functional parts including a bearing structure, a lifting structure and a rotating structure; the bearing structure adopts a framework enclosed by two underframe transverse guards and underframe vertical guards; the lifting structure is installed on the underframe transverse guards and comprises screw rods which penetrate through the underframe transverse guards and are in threaded connection with the underframe transverse guards, the bottoms of the screw rods are fixed on supporting strips, and the tops of the screw rods are provided with rotating hand wheels; the rotating structure comprises a rotating structure body and a guiding structure body. Through the arrangement, the post insulator inspection device has the advantages of being capable of being mutually matched with the various inspection equipment in the prior art and achieving inspection under various severe environments.