77 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.

A magnetic detector (1,2) includes: a magneto-impedance sensor element (10) including a magnetosensitive body (11) configured to cause a magnetization change in response to a strength of a magnetic field when an excitation current IIN is supplied to this body, and a detection coil (12) wound around the magnetosensitive body (11) and configured to output an induced voltage generated by the magnetization change in the magnetosensitive body (11); a sample hold circuit (22, 32) connected to one end of the detection coil (12) and is configured to hold an output voltage of the detection coil (12) when a sampling switch is tuned on; an amplifier circuit (24, 33) connected to an output side of the sample hold circuit (22, 32); and a post-stage high-pass filter (25, 35) connected to an output side of the amplifier circuit (24, 33).

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 utility model relates to an on-line monitoring device for a main hoisting steel wire rope, which comprises a pressure sensor, the pressure sensor is connected with a rotating frame, the rotating frame is rotatably connected with a tensioning wheel, the steel wire rope is supported on the tensioning wheel, the pressure sensor is electrically connected with a signal transmitter, the signal transmitter is connected with a signal receiver, and the signal receiver is electrically connected with the signal transmitter. The signal receiver is electrically connected with an upper detection device, a weak magnetic detection mechanism is installed on the steel wire rope, the weak magnetic detection mechanism comprises a bottom frame, a magnetic field planner and a weak magnetic detector, the magnetic field planner and the weak magnetic detector are installed on the bottom frame, a vertical rod is hinged to the bottom frame, and the magnetic field planner and the weak magnetic detector are installed on the vertical rod through telescopic assemblies. The steel wire rope online detection device can perform online detection on wire breakage and corrosion of the steel wire rope under the condition of normal operation of the steel wire rope, and has the characteristics of high sensitivity, good reliability, simple structure, convenience in installation and maintenance and the like.

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 utility model relates to the technical field of electrical detection, in particular to an electrical circuit detection device with a temperature and electromagnetic detection function, which comprises a main controller, an ASK signal receiving interface, a serial peripheral interface, an ADC signal receiving interface and a USART serial port are arranged in the main controller, and the ASK signal receiving interface receives door magnetic signals of a wireless door magnetic detector. The serial peripheral interface receives a residual current magnitude signal of the residual current sensor and a single-phase current effective value signal of the current mutual inductance sensor. The ADC signal receiving interface receives a crystal oscillator oscillation frequency signal of the temperature sensor. And the control signal is input into the NB-IoT communication module through a USART serial port. And the NB-IoT communication module uploads the packaged data of the signal and the control signal to the Internet of Things cloud platform. The electric power system is accurately monitored, early warning is given out in time, and higher performance is achieved.

Magnetic linear position detector (20, 21), comprising: a stator (1); and a motion device (2) designed to be movable along a first direction relative to the stator (1), wherein an element consisting of the elements stator (1) and motion device (2) is provided with a magnetic detector (3), wherein the other element consisting of the elements stator (1) and motion detector (2) is provided with a magnet (4, 40) which has a first surface (4a, 40a) facing the magnetic detector (3), wherein the magnet (4, 40) is magnetized in such a way that on the first surface (4a, 40a) of the magnet (4, 40) a magnetization direction changes in an arc shape around a magnetization center (5, 5a, 5b) in the first surface, and wherein the magnetic detector (3) is an element whose output changes depending on the direction of a magnetic field, and wherein the magnetization of the magnet (4, 40) is obtained by arranging a straight electrical wire (10) orthogonally to the first surface (4a, 40a) at the magnetization center (5, 5a, 5b) and passing a direct current through the electrical wire (10), characterized by that the magnetization center (5, 5a, 5b) lies within the plane of the first surface (4a), and that a hole is formed in the magnetization center (5, 5a, 5b) to guide the electrical wire (10) through the hole.

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.

A detecting and magnetizing device used after magnet magnetizing comprises a conveying rotary disc, positioning grooves are evenly machined in the position, close to the circumference, of the conveying rotary disc, positioning seats are arranged in the positioning grooves, array type machining material grooves are formed in the positioning seats and used for containing magnet blocks, and the conveying rotary disc is sequentially provided with a feeding station, a detecting station and a discharging station in the anticlockwise rotation direction. A magnetic force detection mechanism is arranged above the detection station; the magnetic detection mechanism comprises magnetic detectors which are uniformly mounted at the bottom of the positioning sleeve, and a push block is slidably mounted at the center of the positioning sleeve; a limiting plate is arranged at the bottom of the trough to support the magnet, one side of the limiting plate is hinged to a support through a pin shaft, the support is fixedly arranged at the bottom of the positioning base and on the pin shaft, and a torsional spring is installed between the limiting plate and the support. According to the device, a mechanical structure is adopted to replace manual operation, magnetic force detection of the magnet blocks is automatically completed, unqualified products are removed, and the working efficiency is effectively improved.

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.

The invention provides a tunnel magnetoresistance magnetic detector with out-of-plane magnetic field detection capability, which comprises a superconducting shielding layer which is of a rectangular superconducting thin film structure, and the direction of an external magnetic field perpendicular to the superconducting shielding layer is changed into the direction parallel to the superconducting shielding layer by utilizing the complete diamagnetism of a superconductor; the two tunnel magnetoresistors are located in edge areas on the two sides below the superconducting shielding layer respectively, the size of each tunnel magnetoresistor is smaller than that of the superconducting shielding layer, and the two tunnel magnetoresistors are the same in magnetic sensitive direction, parallel to the thin film plane of the superconducting shielding layer and used for detecting the magnetic field intensity parallel to the superconducting layer direction; the differential amplifier is used for amplifying differential signals of the two tunnel magnetoresistors; and the signal acquisition system is used for acquiring and processing the amplified differential signals of the two tunnel magnetoresistors. The problem that an existing tunnel magnetoresistor is difficult to detect a magnetic field in the out-of-plane direction is solved.

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.