37results about How to "Improve the effect of flaw detection" patented technology

The invention discloses an automatic aligning control method with wearing compensation. The method comprises the following steps of S10), acquiring inside contour data of a steel rail, and actual position of a detecting wheel; S20), calculating a rail head wearing amount of a steel rail according to inside contour data of the steel rail, calculating a wearing compensation amount through the wearing amount, and compensating an aligning reference value according to the wearing compensation amount; and S30), performing PID controlling according to the compensated aligning reference value and theactual position of the detecting wheel, and outputting an aligning control value. The automatic aligning control method can settle a technical problem of severe frequency loss on the steel rail with severe rail head wearing on the condition of normal aligning device control offset.

The invention provides a warship hull descaling and flow detecting system which comprises a power supply system, a control system, a charging system, an energy storing system, a plasma shock wave generating mechanism, a flaw detection monitoring system, a surface flushing mechanism and an adsorbing and walking robot. When the system runs, probes of the plasma shock wave generating mechanism, the surface flushing mechanism, the adsorbing and walking robot and the flaw detection monitoring system are in underwater operation. Organisms attached to the surface of a warship hull are subjected to primary cleaning by the aid of strong sound shock waves generated from discharging of underwater plasmas, the organisms attached to the surface of the warship hull fall off or are loosened, and then the loosened attachments are cleaned by the aid of the surface flushing mechanism. The descaling effect can be detected through the flaw detecting system after descaling operation, and non-destructive detection can be performed on the surface of the warship hull.

The invention discloses an automatic centering control device with wear compensation. The automatic centering control device with wear compensation comprises a centering sensor, a wear compensation calculating unit and a PID control unit, wherein the centering sensor is used for obtaining rail outline data of the internal side of a steel rail and an actual position of a wheel detector; the wear compensation calculating unit is used for calculating a railhead wear amount of the steel rail according to the rail outline data of the internal side of the steel rail, calculating the wear compensation amount by using the wear amount and compensating a centering reference value in at least three gears according to the wear compensation amount; and the PID control unit is used for performing PID control according to the compensated centering reference value output by the wear compensation calculating unit and the actual position of the wheel detector and outputting a centering control value. According to the automatic centering control device with wear compensation, the technical problem that the frequency is still seriously lost on the steel rail with serious railhead wear in the case of normal control error of a centering device can be solved.

The invention provides a method for ultrasonic flaw detection of a welding line of a steel structure. The method comprises the steps that (1) a flaw detection coupling agent A which comprises, by weight, 40 to 55 parts of ethylene glycol, 25 to 35 parts of glycerin, 10 to 15 parts of epoxy resin, 1 to 3 parts of versamid with molecular weight of 200 to 300, 0.5 to 2 parts of trimethylolpropane and50 to 65 parts of water is prepared; (2) a flaw detection coupling agent B which comprises, by weight, 25 to 30 parts of xanthan gum, 0.5 to 2 parts of sodium alginate and 40 to 60 parts of water isprepared; (3) a layer of flaw detection coupling agent A is sprayed on the surface of the welding line of the steel structural member, wherein the spraying thickness is 1 to 2mm; standing for 60 to 90s is carried out to acquire the steel structural member containing a precoated layer; and (4) the surface of the welding line of the steel structural member containing the precoated layer is sprayed with a layer of flaw detection coupling agent B, wherein the spraying thickness is 1 to 3 mm; a welding line ultrasonic flaw detector is used to carry out ultrasonic flaw detection on the surface of the welding line of the steel structural member; the position information of the flaw of the welding line is recorded in real time. The method for ultrasonic flaw detection of the welding line of the steel structure, which is provided by the invention, can effectively optimize flaw detection at a contact surface with low flatness and in low temperature environment.

The invention discloses a pipeline ray flaw detection device and a flaw detection method. The pipeline ray flaw detection device comprises a ray flaw detector, a positioning ring and at least two fixing rings; multiple positioning rods are arranged on the positioning ring, the positioning rod and the positioning ring are movably connected to fix a welding line in the middle of the positioning ring; an annular sliding rail is arranged in the positioning ring, a sliding block is arranged on the annular sliding rail, the sliding block is fixedly connected with the ray flaw detector through a telescopic lever; the fixing rings are located at two sides of the positioning ring and connected with the positioning ring through a connecting rod mechanism; and fixing modules for fixing the fixing rings on the pipeline are arranged on the fixing rings. In the process of ensuring the flow detection process of the bend, the detector and the welding line are maintained at the fixed angle and distance, and the flaw detection effect is improved.

The invention discloses a progressive feeding fine straightening method for a metal pipe, which includes the step of realizing the straightening of the metal pipe by means of paired straightening rollers when the metal pipe advances in the axial direction. Multiple pairs of straightening rollers are arranged horizontally so that the pressing and straightening force of each pair of straightening rollers is adjusted to increase sequentially along the moving direction of the metal pipe to achieve straightening. The invention can realize the progressive straightening of the metal pipe during flaw detection and improve the flaw detection effect, and has the advantages of simple implementation and good straightening effect.

The invention discloses underwater non-destructive flaw detection equipment and a processing method based on the combination of vision and magnetic powder, which uses the combination of magnetic powder and vision to perform flaw detection operations facing underwater pipelines. The underwater non-destructive flaw detection equipment includes: underwater non-destructive flaw detection devices and underwater Underwater movable platform, the underwater non-destructive flaw detection device is fixed on the underwater movable platform; the underwater nondestructive flaw detection device mainly includes: flaw detector control module, camera module, communication module and image processing module, the underwater movable platform mainly includes motion control module. The invention adopts the motion control module to realize the positioning and movement of the underwater movable platform; adopts the flaw detector control module to realize the spraying of the magnetic suspension liquid; adopts the camera module to collect the image information before and after the absorption pipeline of the underwater magnetic particle flaw detector; adopts the communication module to upload Location information and image information; by extracting and fusing high-level semantic information from magnetic particle inspection data and visual image data, autonomous inspection and non-destructive inspection of underwater pipelines are realized.