8 results about "Acoustic emission" patented technology

The invention discloses a nondestructive detection system for the state of a crude oil tank bottom plate corrosion product. The system comprises an electrochemical impedance spectrum acquisition subsystem (1), an acoustic emission burst information acquisition subsystem (2) and a crude oil tank sedimentation water bottom plate corrosion product state judgment subsystem (3). The generation, dissolution and fracture situations of a corrosion product film on a bottom plate in a crude oil tank under the corrosion environment of sedimentation water are obtained by analyzing electrochemical impedance spectra and acoustic emission energy spectra under the acquisition time, so that the stress corrosion situation and the damage situation of the bottom plate in the crude oil tank can be judged, and the loss of equipment and economy due to stress corrosion is reduced.

The invention discloses an acoustic emission based bolt fracture signal detection method. Through the redundant design of arranging 2 acoustic emission sensors on each detection point and by performing joint judgment of the results generated by the two acoustic emission sensors, the probability of leaking alarm and false alarm can be effectively reduced, the sensor fault can be discovered in time to give an alarm, thus the detection functions are more abundant, and the detection result is more accurate.

The invention provides a multifunctional and intelligent monitoring anchor rod device. The problem that an existing anchor rod cannot monitor rock mass deformation at different levels is solved. According to the invention, an early warning effect on disasters can be achieved through monitoring of acoustic emission. The temperature of a slope and the pressure or humidity of underground water can be monitored. A plurality of circular truncated cone bodies with large outsides and small insides are arranged on the outer side of the anchoring end at intervals in the axial direction, the inner ends of the circular truncated cone bodies are coaxially connected with tension-bearing bodies, penetrating holes penetrating through the tension-bearing bodies inwards in the axial direction are formed in the axial outer ends of the circular truncated cone bodies, the tension-bearing body at the innermost end is fixed to the anchoring end, each outer tension-bearing body penetrates through the penetrating hole in the adjacent circular truncated cone body and the tension-bearing body on the axial inner side of the outer tension-bearing body to be fixed to the anchoring end, the axial inner part of each circular truncated cone body is sleeved with a sleeve with the lower end slidably arranged on the tension-bearing body in a sleeved mode, and the axial outer end of the sleeve is provided with a plurality of open grooves extending towards the axial inner side. The early warning effect on disasters is achieved through monitoring of acoustic emission. The temperature of the slope and the pressure or humidity of underground water are monitored.

The invention relates to a judging method, a device and a system for insulator crimping quality, and belongs to the field of insulator crimping quality judgment. The insulator crimping quality judgingmethod of the application comprises the step of: determining a pressure maintaining stage during crimping of an insulator core rod; obtaining acoustic emission energy generated when the insulator core rod is crimped at the pressure maintaining stage; and judging the crimping state of the insulator core rod according to the acquired acoustic emission energy. According to the judging method, the device and the system for insulator crimping quality, by determining the pressure maintaining stage during crimping of the insulator core rod, acoustic emission energy generated when the insulator corerod is crimped at the pressure maintaining stage is obtained, judging the crimping state of the insulator core rod according to the acquired acoustic emission energy, the online monitoring of the crimp quality of the insulator is realized, and the detection efficiency of the quality of the insulator crimp is improved.

The invention provides an unknown wave velocity acoustic emission source positioning method and system based on an improved MSAC algorithm. The method comprises the following steps of: firstly, non-repeatedly selecting at least five arrival times required by positioning from n arrival time data to form an arrival time subset, and calculating an acoustic emission parameter according to the arrival time subset; calculating estimated values of all arrival time data according to the acoustic emission parameter, and obtaining absolute deviation between the arrival time and the estimated values; when the absolute deviation is smaller than a specified threshold, classifying the corresponding arrival time into a consistent set; calculating the score of the consistent set, and if the score of the consistent set is the highest at present, performing local optimization; repeating the steps until the number of times of operation reaches the specified number of times of operation; and performing repositioning according to all the arrival time data of the arrival time consistent set with the highest score to obtain an optimal positioning result. According to the method, the abnormal arrival time can be identified and eliminated more accurately, the positioning precision is improved, and the calculation efficiency is high.

The invention discloses an adhesion type acoustic emission probe clamp. The adhesion type acoustic emission probe clamp comprises a probe limiting sleeve, a cover plate and an elastic pressure applying mechanism; the problem limiting sleeve comprises a sleeve body and an adhesion plate arranged at the bottom of the sleeve body; the adhesion plate can fix and adhere the adhesion type acoustic emission probe clamp to a piece to be tested through an adhesive; the top of the sleeve body is provided with openings; the cover plate is used for fixedly mounting the elastic pressure applying mechanism;and the cover plate is detachably mounted to the openings in the top of the sleeve body and fix the elastic pressure applying mechanism to the interior of the sleeve body. The adhesion type acousticemission probe clamp aims to solve the technical problems that the conventional acoustic emission probe is poor in applicability, poor in stability, poor in economical efficiency and poor in test accuracy and is easily influence the construction of the piece to be tested.