62 results about "Magnetic detector" patented technology

A roller brush assembly, a cleaning device, a detection method, a storage medium, and a computer program product are provided. The roller brush assembly includes: a roller brush housing; a roller brush, located inside the roller brush housing; and a magnetic detector, located on an outer surface of the roller brush housing and configured to detect a magnetic signal, wherein the magnetic signal is configured to determine a type of the roller brush.

A current sensor includes busbars through which a current to be measured flows, magnetic detectors capable of detecting a magnetic field generated when the current to be measured flows through the busbars, a storage space storing the magnetic detectors, and a housing with which part of the busbars is integrated. Ends of the busbars are connected to an external first unit including a cooling device, and other ends of the busbars are connected to an external second unit whose temperature becomes higher than that of the first unit when the current to be measured flows. In the current sensor, which is capable of measuring a current value of the current to be measured from a result of the detection performed by the magnetic detectors, the housing has first vents penetrating from the inside of the storage space to the outside on a side facing the first unit.

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.

According to the current comparator based on the diamond NV color center, an iron core module comprises an annular iron core, and the iron core module is arranged on a primary current path in a sleeving mode; the primary feedback module comprises a direct current sensor, a secondary winding and a driven current source; the secondary winding is wound on the annular iron core of the iron core module, the driven current source generates output current, the output current flows through the secondary winding to generate reverse magnetic potential in the annular iron core, and primary magnetic balance in the iron core is achieved; and the secondary feedback module comprises a diamond NV color center magnetic detector module and a PID controller, the diamond NV color center magnetic detector module measures the unbalanced magnetic potential, and the PID controller compensates the current in the secondary winding according to the unbalanced magnetic potential, so that zero magnetic flux is always locked in the iron core. According to the technical scheme, the diamond NV color center magnetic detector module is introduced into the secondary feedback module, the unbalanced magnetic potential in the iron core can be detected in a high-precision mode by means of quantum characteristics, and the measurement precision is greatly improved through the sensitive sensing capacity of the secondary feedback module on tiny magnetic field changes.

The application discloses a magnetic detector for detecting neodymium-iron-boron magnetic materials and relates to the technical field of magnetic detection. The magnetic detector for detecting neodymium-iron-boron magnetic materials is characterized in that the uniform mechanism, the control component, the anti-interference mechanism and the disturbance component are cooperatively used to solve the problems that, when the magnetic materials are subjected to overheating and supercooling detection, the temperature cannot be quickly and uniformly distributed around the magnetic materials, thus causing detection errors, and the powder volatilized from the magnetic materials at different temperatures can interfere with the magnetic detection results.

A current sensor which suppresses deterioration of detection accuracy caused by high temperature of electronic components due to heat of a bus bar and is suitable for measurement of large current includes a bus bar through which a current to be measured flows, a magnetic detector detecting a magnetic field generated by the bus bar, and a case integrally formed with the bus bar and having a storage space storing the magnetic detector. The magnetic detector is spaced away from and faces the bus bar. The bus bar is on a first surface of the storage space defining the storage space and facing the magnetic detector. A low thermal conductivity material having a lower thermal conductivity than a resin-based material forming the case is provided between the bus bar and the magnetic detector to contact an opposing surface, on the bus bar, facing the magnetic detector.

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.

Disclosed is a current sensor with which size and / or cost can be reduced while maintaining detection accuracy in an energization path through which a large current is supplied.　A current sensor 10 comprises: a bus bar 12 constituting an energization path; a pair of core members 18, 18 that, above the surface 14 on one side of the bus bar 12 with respect to the plate thickness direction, extend toward one side and the other side with respect to the plate width direction of the bus bar 12 and are disposed facing each other across a gap 16 provided in a central portion with respect to the plate width direction; and a magnetic detector 20 disposed in the gap 16 provided in the interval across which the pair of core members 18, 18 face each other. An extension end portion 22 of each of the core members 18 disposed on the outer side, with respect to the plate width direction, beyond side edge portions 24 of the bus bar 12 is bent toward the bus bar 12 side.

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 invention relates to a watch magnetism detector. One aspect of the invention relates to a dial (2a, 2b) of a watch (1) comprising separate means (3) for determining magnetic events, such a dial (2a, 2b) comprising a visible face (20a) and a hidden face (20b), said dial (2a, 2b) being formed by a stack (9a, 9b) of thin layers of material (10, 11, 12, 13, 14) extending between the two faces (20a, 20b), each of the layers (10, 11, 12, 13, 14) comprises one or more of the following functional elements comprised in the device (3):-at least one magnetic sensor (23); a magnetic event reporting module (4); -a separate power supply unit (21); and-a control unit (7) for managing the operation of the reporting module (4) and of the at least one magnetic sensor (23).

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.

To provide a magnetic detector that has a smaller number of components and can be configured compactly, and a magnetic detection module and the like comprising the magnetic detector.SOLUTION: A magnetic detector comprises a first detection part, a magnet, and a second detection part arranged in order along one direction. The first detection part detects a change in magnetism from the magnet occurring due to a first projection row formed of one or more projections provided on a movable body passing between the first detection part and the magnet along with the movement of the movable body. The second detection part detects a change in magnetism from the magnet occurring due to a second projection row formed of one or more projections provided on the movable body passing between the magnet and the second detection part along with the movement of the movable body.SELECTED DRAWING: Figure 3

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.

Disclosed are methods and systems of blocks with magnets, magnetically-attractive non-magnetic elements, and magnetic detectors. The methods and systems facilitate user attachment and detachment of the blocks to each other and detection of which face of which block is attached to which face of which other block, and in what orientation. The blocks can be comprised of multiple regular convex polyhedra, such as tetrahedrons, cubes, octahedra, dodecahedra, or icosahedra. The faces of the blocks could be equilateral triangles, squares, or regular pentagons. The methods and systems can further comprise a selection pen and system software configured to render the blocks and their attachment to each other on a display.

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.

A control device (2) mounted in an opening (20) in a middle (16) and including a support (14) and a rotatable part, which has a shaft (12), a gripping member (4) and a control member (6) forming a rotation sensor (26). The sensor includes a magnetic detector provided inside the watch case in a radial peripheral region of the control member. On a first side of a circular opening (22), the support has a cavity (24) which is open in the axial direction. The cavity is configured to house the control member fixedly mounted on the shaft, such that this control member can be momentarily retracted, at least for the most part, into the cavity following an axial movement of the shaft into a position in which the magnetic detector is mounted inside the watch case.

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.

Magnetic push button The present invention relates to a magnetic push button (10) comprising a fixed body and a body movable relative to the fixed body along an axis of movement (X); one of the bodies, called the first body (21), comprising: - a magnetic element extending along the axis of movement (X) and defining a magnetic alternation along this axis of movement; the other body, called the second body (22), comprising: - a notching tooth made of ferromagnetic or magnetic material arranged opposite the magnetic element to create a thrust force by magnetic cooperation with the magnetic element, during a movement of the movable body (21) along the axis of movement (X); - a magnetic detector arranged opposite the magnetic element and configured to generate measurements quantifying each movement of the movable body along the axis of movement (X). Figure for abstract: Figure 2

A current sensor 10 that suppresses deterioration in detection accuracy caused by high temperatures of electronic components, such as a magnetic detector, due to heat from a bus bar, and is therefore suitable for measuring large currents, comprises a bus bar 11 through which a current to be measured flows, a magnetic detector 13 capable of detecting a magnetic field generated by the bus bar 11, and a housing 12 formed integrally with the bus bar 11 and having a receiving space 14 for receiving the magnetic detector 13. The magnetic detector 13 is spaced apart from the bus bar 11 and arranged in a position facing the bus bar 11. The bus bar 11 is arranged on a first surface 14a of the receiving space 14, which defines the receiving space 14 and which faces the magnetic detector 13 in a Z-axis direction.Air, which serves as a low thermal conductivity material and has a lower thermal conductivity than a resin-based material constituting the casing 12, is provided between the bus bar 11 and the magnetic detector 13 to contact an opposing surface 11a on the bus bar 11 facing the magnetic detector 13.

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.

A current sensor 10 capable of discharging air heated by heat generated from bus bars from a storage space to the outside in order to suppress a temperature rise around electronic components such as magnetic detectors, and suitable for measuring a large current in the present invention, comprises bus bars 11 through which a current to be measured flows, magnetic detectors 14 capable of detecting a magnetic field generated when the current to be measured flows through the bus bars 11, a storage space 13 in which the magnetic detectors 14 are housed, and a casing 12 with which a part of the bus bars 11 is integrally formed.Ends 11a of the busbars 11 are connected to an external first unit 20 including a cooling device 21, and other ends 11b of the busbars 11 are connected to an external second unit 30, whose temperature becomes higher than that of the first unit 20 when the current to be measured flows. In the current sensor 10 capable of measuring a current value of the current to be measured from a result of detection performed by the magnetic detectors 14, the housing 12 has first ventilation holes 15A penetrating from the inside of the storage space 13 to the outside on a side facing the first unit 20.

Position detection device comprising: a wave (2); a housing (3) supporting the shaft (2) rotatably about an axis of the shaft (2); a magnetic circuit unit (4) fixed to the shaft (2) and arranged to rotate together with the shaft (2); a sensor (5) mounted on the housing (3), the sensor (5) comprising: a sensor body (51); a magnetic detector (50) projecting from the sensor body (51) to the magnetic circuit unit (4); and at least one engagement projection (52, 521, 522, 523) extending from the sensor body (51) near the magnetic detector (50) and engaging an engagement hole (36) arranged on the housing (3), an anti-rotation hole (37) arranged on at least one of the sensor body (51) and the housing (3) at a position spaced from the engagement hole (36) of the housing (3); and an anti-rotation pin (53) arranged on another of the sensor body (51) and the housing (3), wherein the anti-rotation pin (53) engages in the anti-rotation hole (37) to prevent the housing (3) and the sensor body (51) from rotating relative to each other about the engagement hole (36), wherein at least a part of the at least one engagement projection (52, 521, 522, 523) is in contact with an inner wall of the engagement hole (36) on a straight line (L) connecting a center of the magnetic detector (50) and a center of the anti-rotation pin (53), the at least one engagement projection (52, 521, 522, 523) comprises more than three engagement projections arranged on a circumference centered on the magnetic detector (50); a predefined engagement projection (521) of the engagement projections (52, 521, 522, 523) is in contact with the inner wall of the engagement hole (36) on the straight line (L) connecting the center of the magnetic detector (50) and the center of the anti-rotation pin (53); and other engaging projections (522, 523) of the engaging projections (52, 521, 522, 523) are in contact with the inner wall of the engaging hole (36) at intervals of 120° or less in a circumferential direction from a starting point (P) where the predefined engaging projection (521) of the engaging projections is in contact with the inner wall of the engaging hole (36).

A current sensor includes a core member having a first gap between end surfaces and having a circular shape through which a busbar is insertable, the core member being configured to concentrate a magnetic field generated when a current to be measured passes through the busbar, a magnetic detector configured to detect the magnetic field concentrated by the core member, and a substrate on which the magnetic detector is mounted on one side by surface mounting.

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.