26 results about "Magnetic detector" patented technology

The invention relates to a P91 pipeline aging prediction method, and belongs to the field of P91 pipeline aging prediction. The method comprises the following steps: acquiring a micro-magnetic signal (such as Barkhausen noise) of a P91 pipeline through a micro-magnetic detector, and extracting characteristic parameters related to an aging state; and inputting the parameters into a pre-trained aging grade prediction model, and directly outputting the aging grade (1-5 grade) of the pipeline. The prediction model is constructed based on a machine learning algorithm (such as ReliefF feature selection and a BP neural network), and training data comes from an accelerated aging sample which is simulated through specific heat treatment and has a clear microstructure (represented by EBSD) and macromechanical property correlation. According to the method, rapid, lossless and quantitative prediction of the aging state of the P91 pipeline is realized, and a reliable basis is provided for safety assessment and residual life prediction of the in-service pipeline.

The invention relates to the technical field of defect detection, in particular to a robot magnetic detector constant magnetic field control system and method, and the system comprises a control circuit, a power supply circuit, a magnet yoke winding drive circuit, a magnet yoke winding current detection circuit, a magnet yoke winding temperature detection circuit, a magnetic field detection circuit and a switching signal input and output circuit. The robot magnetic detector constant magnetic field control system and method have the advantages that high-precision constant magnetic control is achieved, detection quality can be guaranteed, intelligent temperature protection can be achieved, equipment damage is prevented, anti-interference design is carried out, signal acquisition reliability can be improved, multi-state indication and remote control are achieved, operation efficiency can be improved, and the robot magnetic detector constant magnetic field control system and method are suitable for popularization and application. The whole system is compact in structure and reasonable in circuit layout, adapts to robot integration, and meets automatic detection requirements of special equipment in complex environments such as high altitude and closed environments.

An incremental magnetic encoder defining an encoder axis and including a fixed body and a movable body, one of the bodies, known as the first body, including a first ring extending in a first longitudinal direction and a first circumferential direction, one of the first directions corresponding to the first encoding direction, the first ring defining at least two different magnetic alternations, the other body, known as the second body, including at least one first notching tooth capable of being placed opposite each magnetic alternation of the first ring to create a notch with at least two different notch steps depending on the position of the second body, a first pair of magnetic detectors positioned opposite the first ring.

The utility model provides a cesium optical pump magnetometer for aviation magnetic exploration, which relates to the technical field of cesium optical pump magnetometers, and comprises a fuselage, a rotor wing is arranged on the surface of the fuselage, an undercarriage is arranged on the side surface of the fuselage, a battery pack is arranged on the bottom surface of the fuselage, and a connecting ring is fixedly mounted on the surface of the undercarriage. A fixing rod is fixedly installed in the connecting ring, a magnetic detection mechanism is fixedly installed on the bottom face of the machine body, a positioning antenna is arranged, the real-time target positioning and target positioning calibration functions are supported, demagnetization treatment is further conducted according to the working characteristics of a magnetic detector, high-strength carbon fibers, aviation aluminum alloy, current shielding and motor power demagnetization are adopted, and the magnetic detector can be used for detecting the target position. Light-weight high-strength materials of carbon fibers, aeronautical aluminum alloy and lithium polymers are adopted to form independent modules, the overall performance is improved, the overall weight is reduced, flight stability is kept, a high-strength lengthened carbon fiber fixing rod and titanium alloy are adopted to serve as a magnetic sensor support, and stability of the magnetic sensor in aerial operation is guaranteed.

The utility model relates to the technical field of crack monitoring devices, in particular to a micro-crack monitoring device for a root end of a switch rail. The device comprises a mounting platform, supporting legs are arranged at four corners of the bottom of the mounting platform, rollers are arranged at the bottom of each supporting leg, a magnetic powder monitoring assembly is arranged on one side of the mounting platform, and a cleaning assembly is arranged on the other side of the mounting platform. Interference of human factors on detection results is reduced through automatic operation, the situation that in traditional manual detection, experience, fatigue degree and the like of detection personnel can affect detection accuracy is avoided, the automatic magnetic powder monitoring assembly of the device can accurately deploy a magnetic detector and a spray head above the root end of a switch rail, and the detection accuracy is improved. The magnetic suspension spraying and detection work is stably completed according to a preset program, a high-definition camera is matched with an automatic shooting process, a clear switch rail image can be stably obtained, a reliable basis is provided for detection, and the accuracy and consistency of a detection result are ensured.

The application discloses a telescopic supporting arm for a magnetic detector, and belongs to the technical field of magnetic detectors. The telescopic supporting arm mainly comprises a supporting arm, a telescopic assembly arranged on the supporting arm, a supporting rod rotatably connected to the inner side of the supporting arm, a supporting seat connected to the surface of the supporting rod, and a fixing seat connected to the surface of the supporting seat. The telescopic supporting arm for the magnetic detector is convenient for the supporting seat and the fixing seat to be inclined and adjusted through the extension driving force or the retraction driving force of the first driving source and the hinging action of the first hinge seat and the second hinge seat, so that the corresponding magnetic suspension liquid spraying pipe can be inclined and adjusted, and the spraying direction of the magnetic suspension liquid spraying pipe can be adjusted. The two magnetic suspension liquid spraying pipes can be driven to extend outward or retract inward under the rotating action of the first adapter ring and the second adapter ring through the two second driving sources, the spraying range of the magnetic suspension liquid can be expanded through the driving of the magnetic suspension liquid spraying pipe to retract inward and extend outward, and the flexibility of use is improved.

In a torque sensor of a torque detection system, in a state where a torque is not generated, a first magnetic detector overlaps with one (e.g., N-pole) of a plurality of magnetic poles of a magnet when the one of the plurality of magnetic poles of the magnet is radially projected onto the first magnetic detector. A second magnetic detector overlaps with another one (e.g., S-pole) of the magnetic poles when the another one of the magnetic poles is radially projected onto the second magnetic detector. A motor control device calculates a sum of a value, which relates to a detected strength of a magnetic field detected by the first magnetic detector, and a value, which relates to a detected strength of the magnetic field detected by the second magnetic detector. The motor control device is configured to calculate a steering torque based on the sum.

The embodiment discloses an automatic potential inspection system for a subsea pipeline, which is characterized in that a magnetic detector and a cesium optical pump are arranged on an underwater load platform, position signals between the subsea pipeline and the underwater load platform are respectively acquired, and an automatic inspection path signal of the underwater load platform is acquired based on the signals acquired by the magnetic detector and the cesium optical pump; the problem that in the prior art, image information is fuzzy when automatic routing inspection path signals are obtained depending on images is solved, the problems that the pipeline detection capacity and precision are limited by independently adopting magnetic detection equipment are solved, the obtained automatic routing inspection path signals are high in precision, and meanwhile the potential collection precision is not affected.

This application provides an electromagnetic detection device and system, relating to the field of electromagnetic exploration technology. The electromagnetic detection device includes a first telescopic rod, a second telescopic rod, a power source, a first transmission mechanism, a support, a rotating shaft, and an electromagnetic detector. The support is located at one end of the first telescopic rod, and the rotating shaft is rotatably mounted on the support with its axis perpendicular to the axis of the first telescopic rod. The electromagnetic detector is mounted on the rotating shaft. The second telescopic rod and the power source are both located inside the first telescopic rod. The second telescopic rod is coaxial with the first telescopic rod, with one end connected to the power source and the other end connected to the rotating shaft via the first transmission mechanism. The second telescopic rod extends and retracts synchronously with the first telescopic rod. The power source can indirectly drive the rotating shaft to rotate around its own axis via the second telescopic rod and the first transmission mechanism, thereby causing the electromagnetic detector to rotate around the axis of the rotating shaft. Based on this, the pointing (i.e., angle) of the antenna in the electromagnetic detector can be adjusted, making it more practical and improving detection accuracy.

Reproduction 1.1 is a front view of a door magnetic detector; reproduction 1.2 is a back view thereof; reproduction 1.3 is a left view thereof; reproduction 1.4 is a right view thereof; reproduction 1.5 is a top view thereof; reproduction 1.6 is a bottom view thereof; and reproductions 1.7 and 1.8 are two perspective views thereof.

Audio capture apparatuses may include a magnetic detector positioned adjacent to an audio speaker to sense variations in the magnetic field generated by the speaker's electromagnetic coil, and a signal-conditioning module including a pre-amplifier and a noise‑profile module. The noise-profile module may record a reference magnetic signal representing background electromagnetic noise and may subtract that reference magnetic signal during audio capture to isolate the true audio signal. Systems including such audio capture apparatuses may support simultaneous testing of multiple electronic devices within shared environments without acoustic crosstalk, thereby enabling scalable and interference-resistant testing. Various other apparatuses, systems, and methods are also disclosed.

The utility model provides a separating device and a magnetic detector. The separating device comprises a covering plate, a magnetic carrier plate and a separating part, a substrate placing area is defined on the upper surface of the magnetic carrier plate; m through holes are formed in the positions, not defined as the substrate placement areas, of the two opposite sides of the magnetic carrier plate respectively; the cover plate covers the upper surface of the magnetic carrier plate and the cover plate and the edge of the magnetic carrier plate are magnetically adsorbed as a whole; the separating part is arranged below the magnetic carrier plate; n lug bosses are arranged on the upper surface of the separating part; the two opposite sides of the magnetic carrier plate are each correspondingly provided with at least one protruding part. The sectional area of each lug boss is smaller than or equal to that of the corresponding through hole; the height of the protruding part is larger than the thickness of the magnetic carrier plate, and the magnetic carrier plate and the covering plate are separated based on the height of the protruding part penetrating through the through hole. According to the utility model, the cover plate and the magnetic carrier plate are directly disassembled through the separation part, so that the separation steps are effectively reduced, and the mechanical automation is conveniently realized.

This invention discloses a condenser oxide scale detection system, belonging to the technical field of detection equipment. It includes a manifold, a water collection tank, a magnetic detector, an oxide scale separator, and a shielded vacuum pump. The manifold and water collection tank are located inside the condenser hot well. The manifold and water collection tank are connected, and the water collection tank is connected to the magnetic detector and the oxide scale separator sequentially via an outlet pipe. The solid outlet of the oxide scale separator is connected to an oxide scale discharge pipe, and the liquid outlet of the oxide scale separator is connected to the condenser hot well via a return water pipe. The shielded vacuum pump is located on the return water pipe. This invention utilizes a sampling method to directly measure the concentration of oxide scale in the liquid-solid two-phase flow in the condenser. Compared with traditional sampling methods, it eliminates the need for temperature and pressure reduction, reducing errors caused by valve interception of oxide scale. Compared with vibration wave technology, it eliminates the need for drilling holes in high-temperature, high-pressure industrial pipelines. In comparison, this invention features minimal installation and implementation difficulty, high automation, and high measurement accuracy.

An encoder includes a rotating body that is rotatable around a rotation axis; a disk that is fixed to the rotating body and has a scale formed in a ring shape; an optical module that is disposed to face the disk and detects the scale; a first magnet that is disposed on one side from the disk in a direction of the rotation axis and fixed to the rotating body; and a first magnetic detector that is disposed on a remaining side from the disk in the direction of the rotation axis and detects magnetism of the first magnet.

Described is a method for checking a valuable document transported in a transport direction with a security element that has at least one composite magnetic area comprising a hard magnetic sub-area with hard magnetic magnetic material and an adjacent soft magnetic sub-area with soft magnetic magnetic material, wherein the sub-areas are separated by a strip or adjoin each other along a line which runs at least partially obliquely or orthogonally to the transport direction.The method comprises first magnetizing the composite magnetic region in a first magnetization direction with a first magnetic field whose strength is greater than the coercive field strength of the hard magnetic material, and second magnetizing the composite magnetic region in a second magnetization direction with a second magnetic field whose strength is less than the coercive field strength of the hard magnetic material, wherein the second magnetization direction differs from the first magnetization direction and is preferably directed opposite to the first magnetization direction. During the second magnetization, a magnetic signal of the composite magnetic region is detected by means of a magnetic detector. The magnetic signal is evaluated to determine whether it corresponds to two oppositely magnetized sub-regions.

The invention describes a method for checking a value document transported in a direction of transport and containing a security element that comprises at least one composite magnetic region comprising a hard-magnetic subregion containing hard magnetic material and an adjacent soft-magnetic subregion containing soft magnetic material, the subregions being separated by a strip or adjoining one another along a line, at least part of which strip or line runs obliquely or orthogonally with respect to the direction of transport. The method comprises first magnetization of the composite magnetic region in a first magnetization direction using a first magnetic field, the strength of which is greater than the coercive field strength of the hard magnetic material, and second magnetization of the composite magnetic region in a second magnetization direction using a second magnetic field, the strength of which is less than the coercive field strength of the hard magnetic material, the second magnetization direction differing from the first magnetization direction and preferably being directed counter to the first magnetization direction. During the second magnetization, a magnetic signal of the composite magnetic region is detected by means of a magnetic detector. The magnetic signal is evaluated, this involving checking whether the magnetic signal corresponds to two oppositely magnetized subregions.

A current sensor is disclosed that can maintain detection accuracy in a circuit with a large current, and achieve miniaturization and low cost. The current sensor (10) includes: a busbar (12) that forms a circuit; a pair of core members (18, 18) that extend above one side (14) of the busbar (12) in the thickness direction toward one side and the other side in the width direction of the busbar (12) and are arranged opposite each other with a gap (16) provided in the central part in the width direction; and a magnetic detector (20) that is arranged in the gap (16) provided in the gap between the pair of core members (18, 18) and the extended ends (22) of each core member (18) that are arranged outside the width direction of the busbar (12) beyond the side edge (24) of the busbar (12) are bent toward the busbar (12).

The application discloses a fishing device and a fishing method, and belongs to the technical field of downhole operation. The fishing device comprises a fishing tool, a magnetic detector and a leading shoe which are connected in sequence. The magnetic detector comprises a sealed cavity formed by a coaxial sleeve of a shell and an inner cylinder, a perforated ball head which is coaxially sleeved on the outer wall of the inner cylinder, a ball socket which is sleeved on the outer wall of the perforated ball head and combined into a ball hinge structure, an inner wall of the ball socket and a key groove of the perforated ball head are in sliding connection, the ball socket can only rotate along the longitudinal section of the ball socket, a Halbach array permanent magnet which is fixedly connected with the ball socket, a plurality of force sensors which are arranged in an annular array on the inner cylinder, and each force sensor is fixedly connected with the Halbach array permanent magnet through an elastic element. The fishing device can realize the judgment of the fish top attitude, significantly improve the centering accuracy and the one-time fishing success rate, thereby effectively shortening the operation cycle and reducing the non-production time.

This invention provides a detachable, low-magnetic-characteristic AUV magnetic detector probe fixing device and disassembly method, belonging to the field of underwater robot technology. The device includes: a base, a probe rod, a buoyancy block, a lightweight outer shell for the probe rod, and a lightweight outer shell for the base. The base is fixed to the AUV carrier frame, and the base is covered by the lightweight outer shell. The probe rod is connected to the base via a flange, and a buoyancy block is installed between the probe rod and the lightweight outer shell. The end of the probe rod has an angle-adjustable optically pumped magnetic detector probe fixing frame, on which the optically pumped magnetic detector probe is mounted. This invention is made of non-magnetic titanium alloy and non-magnetic resin materials, and the overall design is streamlined and smooth, featuring high integration, low fluid resistance, and low self-magnetic interference. Furthermore, the probe rod assembly can be completely separated from the base, facilitating the transportation, storage, and sensor maintenance of the AUV.

The invention relates to a jacking drill head device (1), in particular a pilot drill head device, for a device (100) for producing a horizontal borehole in a soil (4) using the jacking drilling method, comprising a base body (5) with a proximal section (6) that can engage with the soil (4) and a distal section (7) opposite the proximal section (6), wherein the distal section (7) has a coupling device (8) for coupling with a pipe string (2), wherein the base body (5), in particular the proximal section (6), is designed such that the detection of ferromagnetic bodies (12), in particular munitions, located in the soil (4), in a detection area (13) around the proximal section (6) is enabled by means of at least one sensor unit (11) of a magnetometer system (10) and / or an electromagnetic detector system that can be arranged at least partially inside the base body (5) or on the outside of the base body (5).wherein a guide device (32) is provided on the outside of the base body (5), which is configured to receive, at least section by section, one or more connecting cables (29) of the at least one sensor unit (11) extending on the outside of the base body (5) in the direction of the distal section (7). The invention further relates to a pipe string (2), devices (100), a system (200) and a jacking drilling method for producing a horizontal borehole in a soil (4).

The application provides a magnetic field strength-plane gradient composite plane magnetic detector, and relates to a magnetic detector, which comprises a superconducting layer, a magnetoresistance layer and a soft magnetic layer. The superconducting layer is composed of two identical closed superconducting loops connected together, the two closed superconducting loops have ring holes with the same size at the centers, the two closed superconducting loops and the common area connected together each comprise a current compression structure, the magnetoresistance layer is located above the current compression structure of the superconducting layer, the soft magnetic layer is a rectangular structure, two rectangular structures are located above the superconducting layer, one rectangular structure is located below the superconducting layer, and the one rectangular structure overlaps with the two rectangular structures above the superconducting layer at the position of the ring hole of the superconducting layer. The application overcomes the problem that the existing magnetic detector cannot simultaneously measure the magnetic field strength and the magnetic field gradient in different directions, and provides a new magnetic field strength-gradient composite magnetic detector.

Audio capture apparatuses may include a magnetic detector positioned adjacent to an audio speaker to sense variations in the magnetic field generated by the speaker’s electromagnetic coil, and a signal-conditioning module including a pre-amplifier and a noise-profile module. The noise-profile module may record a reference magnetic signal representing background electromagnetic noise and may subtract that reference magnetic signal during audio capture to isolate the true audio signal. Systems including such audio capture apparatuses may support simultaneous testing of multiple electronic devices within shared environments without acoustic crosstalk, thereby enabling scalable and interference-resistant testing. Various other apparatuses, systems, and methods are also disclosed.

The invention discloses an equipment protection method and system based on double locking. The method comprises the following steps: acquiring a first protection signal corresponding to a target protection cover through a safety interlocking device, and sending the first protection signal to a door magnetic detector; and obtaining a second protection signal corresponding to the target protection cover through the door magnetic detector, and performing judgment processing on the first protection signal and the second protection signal based on a preset safety protection rule to obtain a target protection result corresponding to the target protection cover. According to the technical scheme, the problem that potential safety hazards are easily generated due to failure of the safety interlocking device can be solved, and the intrinsic safety level of the safety interlocking device is improved.

Timepiece control device. The control device (2) is mounted in a through opening (20) in an intermediate part (16) and comprises a support (14) and a rotatable part comprising a shaft (12), a grip member (4) and a control member (6) forming a rotation sensor (26) comprising a magnetic detector arranged in a radially outer peripheral region of the control member within the case. On a first side of the circular opening (22), the support has a cavity (24) which is open in the axial direction and which opens into the interior of the case, the cavity being dimensioned such that it can accommodate at least most of the control member fixedly mounted on the shaft therein, such that, after axial movement of the shaft into a position in which the magnetic detector is mounted within the case, at least most of the control member can be temporarily retracted into the cavity. Preferably, the cavity is located mostly within the through opening.

Incremental Magnetic Encoder The present invention relates to an incremental magnetic encoder defining an encoder axis and comprising a fixed body and a movable body; one of the bodies, referred to as the first body, comprising: - a first ring (51) extending along a first longitudinal direction and a first circumferential direction, one of said first directions corresponding to the first encoding direction, the first ring (51) defining at least two different magnetic alternations; the other body, referred to as the second body, comprising: - at least one first notching tooth (71) adapted to be positioned opposite each magnetic alternation of the first ring (51) to create notching with at least two different notching pitches depending on the position of the second body; - a first pair of magnetic detectors positioned opposite the first ring (51). Figure for the abstract: Figure 4

This invention relates to the field of oil and gas pipeline inspection technology, and discloses an oil and gas pipeline stress zone detection device and its detection method. The oil and gas pipeline stress zone detection device includes two sets of semi-circular shells, the ends of which are fixedly connected by bolts. It also includes two sets of mounting frames, with guide rails adapted to the curvature of the oil and gas pipeline fixedly connected between the two sets of mounting frames. The semi-circular shells are mounted on the guide rails. This invention uses intermittent and equidistant rotation of a semi-circular arc to drive a stress magnetic detector to perform multi-directional, high-density sampling, comprehensively capturing abnormal magnetic memory signals on the pipeline cross-section, effectively avoiding missed detections, and achieving full coverage stress state detection in the circumferential direction of the oil and gas pipeline, effectively improving the accuracy of the detection results. Furthermore, in conjunction with the linear movement of the entire moving frame, the detection surface is continuously shifted and switched, achieving comprehensive detection from "point" to "surface" to "volume," further improving the accuracy of the detection results.