318 results about "Magnetic probe" patented technology

A magnetic focusing immunosensor for the detection of pathogens comprising a laser, an exciting fiber and a collecting fiber, a fiber optic magnetic probe in communication with the collecting and exciting fibers and means for detecting, collecting and measuring fluorescent signals in communication with the collecting fiber. The probe and the collecting and exciting fibers are configured to focus paramagnetic microspheres attached to antigen/antibody/optically labeled complexes in a predetermined pattern in the field of view of the collecting fiber while blocking background interference.

An RFEC excitation unit and sensor apparatus and method that facilitate detection of cracks or other anomalies within or under a surface and immediately next to an expected structure (such as a rivet) that would otherwise cause a signal change preventing detection of the cracks. In some embodiments, the apparatus includes actuators and control that move the apparatus and analyze sensed RFEC signals to determine the location of the rivet, and then to rotate (mechanically or electronically) the sensed signal and/or excitation signal to maintain a constant relationship to the edge of the rivet in order that signals from the rivet edge are suppressed and signals from the cracks are detected. In some embodiments, the excitation unit is maintained at the center of the rivet surface, and the sensor is moved around the rivet in a circle centered on the rivet.

The invention discloses a method for preparing carbon-coated superparamagnetic ferroferric oxide gel, which comprises: dissolving ferrocene and surfactant in an acetone solvent; adding solution of hydrogen peroxide into the solution to directly oxidize the ferrocene to synthesize polycrystal uniform magnetic nano balls under a low-temperature (180 to 240 DEG C) solvothermal condition; and allowing the polycrystal uniform magnetic nano balls to react in a magnetic field to prepare a magnetic linear nano material. The polycrystal uniform magnetic nano balls and nano chains are characterized in that: the particle size of the polycrystal uniform magnetic nano balls is limited to a narrow range and controllable; and the nano chains consist of uniform spherical particles and have high stability, and the inter-chain distance is controllable. The superparamagnetic polycrystal uniform nano ball and linear nano chain materials have high superparamagnetism and high chemical stability and gel stability and have promising application prospect in the field of biomedicine, nano self-assembly and the like; the nano balls are grafted by medicaments and can be used as medicament carriers; under the action of the magnetic field, the nano balls can be used as magnetic control photonic crystal; and the nano chains have a promising application prospect in the field of Bragg reflectors, magnetic probes, biomedicine and the like.

A combination battery, light bulb, fuse tester having novel features. In particular, the tester includes a novel probe apparatus including an actuator, a pair of opposed probe arms, each of the probe arms having an electrical contact on an end thereof, the probe arms being adapted such that operation of the actuator biases the ends of the probe arms away from each other to an open position allowing the electrical poles of a battery, light bulb, or fuse to be tested to be contacted by the contacts on the probe arms. Additional features include magnetic probe contacts to facilitate the testing of a battery, light bulb, or fuse.

Labeled antimicrobial peptides and method of using the same to detect a microorganism of interest. In one embodiment, the method involves adding immuno-capture beads to a sample, the immuno-capture beads including capture antibodies coupled to a paramagnetic bead, the capture antibodies being specific for the type of microorganism of interest. After mixing, the target microorganism binds to the capture antibodies. Next, the beads are collected by positioning a magnet close to the sample, and the unbound material is removed from the sample. Then, a solution containing fluorescently-labeled antimicrobial peptide is added to the sample, the labeled peptide binding in great numbers to the immuno-captured microorganism. After removing unbound peptide, the beads are suspended in solution and a magnetic probe is used to collect the beads in a small volume. With the beads thus drawn together, the solution is excited with a laser. Such excitation causes the label to fluoresce, which fluorescence is then detected.

The present invention relates to the invention of the magnetic flux leakage flaw detection method. The strong magnets such as steel plates are magnetized in multiple magnetic fields of different strengths, and the magnetic probes are used to detect the magnetic flux leakage of the magnetized strong magnets, or the strong magnets are magnetized in a certain magnetic field. A plurality of magnetic probes arranged at different positions along the magnetization direction are used to detect the magnetic flux leakage of the magnetized strong magnet, and the output signal of the magnetic probe after the detected magnetic flux leakage is subjected to the calculation of highlighting the signal generated by the internal defect of the strong magnet. In addition, the magnetic flux leakage flaw detection method can be used to detect defects with high precision, so the hot-rolled steel sheet after hot rolling is inspected by this method, and the detected defect is calibrated on the position of the defective steel sheet, so that the correct defect can be grasped in advance. Scaled or descaled hot-rolled steel sheet with location information.

An antenna (3) of an electromagnetic probe used in investigation of geological formations GF surrounding a borehole WBH comprises a conductive base (31) and an antenna element (32). The conductive base (31) comprises an opened non-resonant cavity (33). The antenna element (32) is embedded in the cavity (33) and goes right through the cavity. The antenna element (32) is isolated from the conductive base (31). The antenna element (32) is coupled to at least one electronic module via a first 34A and a second 34B port, respectively. The electronic module operates the antenna so as to define a simultaneously superposed pure magnetic dipole and pure electric dipole.

A wall-climbing robot for magnetic particle defect testing comprises a running device, a magnet spraying device, a magnetizing device and a marking device, magnetic adsorption wheels with damping structures are mounted on a frame, four E-type probes are connected with eccentric cam driving devices via flexible connectors, the marking device comprises a push-pull electromagnet, and a marking stamper is mounted at the bottom of the electromagnet. The wall-climbing robot can be firmly attracted on the wall face of a tank, the obstacle avoidance capability can be improved effectively by the aid of the magnetic probes through elastic connection, existing manual operation can be substituted completely, defect testing efficiency can be improved, and personal injury can be reduced.

The invention discloses an intelligent safety control system which comprises a fingerprint password cabinet and a sensing detector. The fingerprint password cabinet comprises a cabinet body, a cabinet door, a panel and a fingerprint collection instrument. A power socket and a network socket are arranged on the back face of the cabinet body, wired/wireless network cards are arranged in the cabinet body, a main control panel and a motor are arranged in the cabinet door, the main control board is connected with the motor, the network socket is connected with the wired/wireless network cards, a wireless module and a fingerprint module are integrated on the panel, the sensing detector is one or any number of a WIFI network camera, a door magnetic probe, a window magnetic probe, a smoke probe, a fuel gas probe, an infrared probe, an emergency help-calling button and a door and window shock displacement wireless detector, and the sensing detector and the wireless module transmit information in a wireless mode. According to the intelligent safety control system, fingerprint passwords, smoke alarming, fuel gas alarming, onsite video recording, remote monitoring, household theft prevention and other technologies are integrated, and the integrated intelligent safety control system is formed.

The invention discloses a whole-zone electric coupling source frequency domain magnetic sounding method and a device thereof; the magnetic sounding method comprises the following steps: (1) a transmission power source (generating set) is arranged, the transmission power source is connected with a multiple frequency current transmission machine and the multiple frequency current transmission machine is connected with two current-supply electrodes A and B; (2) a transmission-reception distance r is selected, a reception magnetic probe is arranged and is connected with a reception machine; (3) the transmission power source, the multiple frequency current transmission machine and the reception machine are started, the multiple frequency current transmission machine transmits the current of designated wave form, voltage, volume as well as frequency to the underground via the current-supply electrodes A and B, the reception machine measures the magnetic field responses of each frequency component from the underground simultaneously, the relevant parameters are automatically stored into a memory and the apparent resistivity of near zone, far zone and medium zone can be automatically calculated respectively according to relevant formulas, automatically drawn out and stored. The invention also comprises the corresponding devices. The whole-zone electric coupling source frequency domain magnetic sounding method is suitable to be used for underground electrical distribution observation in the whole zone (including the near zone, the medium zone and the far zone), used for investigating underground geological structure and mineral product distribution or solving other engineering, hydrological as well as environmental geological problems, and has high observation efficiency, high accuracy and simple equipment.

A common source double-frequency excitation type multifunctional micro-magnetic signal synchronous detection method is disclosed and belongs to the technical field of micro-magnetic nondestructive testing. Via use of the common source double-frequency excitation type multifunctional micro-magnetic signal synchronous detection method, five types of typical micro-magnetic detection parameters can be obtained synchronously, and detecting efficiency can be greatly improved. A standard micro-magnetic probe comprises an excitation magnetic circuit consisting of a magnetic core and an excitation wire coil, an induction wire coil wounded around the magnetic core, a Hall element used for detecting surface tangential magnetic field change of a ferromagnetic component being detected, and a Barkhausen noise detection wire coil. Sine wave superposed signals having a low frequency less than 100 Hz and a high frequency greater than 1k Hz that matche with an amplitude ration are used as excitation signals, and the excitation signals are sent into the excitation wire coil of the standard micro-magnetic probe so as to magnetize the ferromagnetic component being detected. The induction wire coil, the Hall element and the Barkhausen noise detection wire coil are respectively used for synchronously picking characteristic signals such as magnetic induction intensity time-varying signals, tangential magnetic field detection signals and Barkhausen noise detection signals; magnetic hysteresis loops, tangential magnetic field intensity time-varying signals, Barkhausen noise, eddy current impedance and incremental magnetic permeability can be quickly detected.

A method and system for storing information in a nonvolatile memory comprising: a substrate comprising magnetic material operatively associated therewith, the magnetic material having at least one first portion of low permeability and at least one second portion of high permeability; a reader comprising a sensor for reading information by measuring the magnetic permeability for the at least one first portion and the at least one second portion; whereby the at least one first and second portions are subjected to a magnetic probe field from one of an external source, the sensor, or a combination of an external source and the sensor.

The invention relates to clearance measurement, in particular to a vehicle door and side body sealing clearance measuring instrument and a measuring method thereof in clearance measurement. The vehicle door and side body sealing clearance measuring instrument comprises a magnetic main seat, a flexible expansion link and a magnetic probe seat, wherein one end of the flexible expansion link is rotatably connected with the magnetic main seat, and the other end of the flexible expansion link is fixedly connected with the magnetic probe seat; and a probe for measuring the sealing clearance is arranged on the magnetic probe seat. The invention also provides a measuring method for using the sealing clearance measuring instrument for measurement. The invention has the advantages of small measurement error, simple operation, good uniformity of multiple measurements for the same vehicle in the same position and good uniformity of measurement of difference vehicles in the same position.

A steel blade residual stress micro-magnetic nondestructive testing method and a steel blade residual stress micro-magnetic nondestructive testing device based on incremental permeability belong to the technical field of steel blade residual stress nondestructive testing. An automatic manipulator clamps a micro-magnetic probe to scan a steel blade to detect micro-magnetic signals, then, incremental permeability is extracted to represent residual stress, and finally, the residual stress distribution of the whole blade is acquired. The testing device mainly comprises a manipulator, a micro-magnetic probe, a system control and micro-magnetic signal collecting and processing module, and the like. The testing device can work in two modes: a blade motion testing mode and a probe motion scanning mode. In the blade motion testing mode, the micro-magnetic probe is fixedly mounted on the base of a workbench, a pincer-like clamp is mounted at the end of the manipulator, a blade is clamped to move along a preset curved surface relative to the micro-magnetic probe, and thus double sides of the blade are tested. In the probe motion scanning mode, a steel blade is fixedly mounted on an open ring clamp, the end of the manipulator clamps the micro-magnetic probe to scan the surface of the steel blade, and the blade can be turned to complete double-side testing by rotating a driving mechanism.

The invention discloses a remote control caterpillar telescopic traction magnetic probe car. A telescopic nonmagnetic trailer is connected with a remote control caterpillar tractor by two hinges; when the remote control caterpillar telescopic traction magnetic probe car expands, the telescopic nonmagnetic trailer lands automatically, so the vehicle length dimension is increased; and when the remote control caterpillar telescopic traction magnetic probe car contracts, the telescopic nonmagnetic trailer lifts automatically, so structural length of the whole vehicle is reduced. According to the adopted technical scheme that the telescopic nonmagnetic trailer is connected with the remote control caterpillar tractor by the two hinges, when the probe car works, a telescopic mechanism expands and a probe array car is positioned outside of a magnetism isolation distance range, so the magnetic interference of the tractor with a probe array is avoided and the detection accuracy is improved; and after the telescopic mechanism contracts, the dimensions of the whole vehicle are reduced, so the transportation is convenient. In addition, with the adopted remote control caterpillar tractor, the whole vehicle has the characteristics of having high ground adaptability, allowing operators to operate at a long distance from a danger zone and the like, thereby improving ground adaptability and operation safety.

A neural probe deployment system comprising a magnetic probe, a magnetic field generator acting on the magnetic probe, a first guiding tube disposed on a first side of the magnetic field generator, wherein the magnetic probe is loaded inside the first guiding tube, and a second guiding tube disposed on a second side of the magnetic field generator, wherein activation of the magnetic field generator propels the magnetic probe from the first guiding tube through the second guiding tube, thereby deploying the magnetic probe.

The invention discloses a measuring system and a measuring method for noncontact type switch power duty factor and switch frequency. The system and method can be used for solving the problem of the traditional measuring method that the efficiency is low because the measured switch power circuit board is needed to be contacted and the insulated circuit board cannot be measured. When the system andmethod are used for measuring, a voltage signal is outputted by irradiating the signal through a magnetic field of a switch power magnetic element (201) coupled with a noncontact magnetic probe (202); the voltage signal is inputted to an amplification processing device (203) and is amplified; and the digital sampling and digital signal treatment are performed on the amplified voltage signal by a signal processing device (204), thereby acquiring the duty factor and switch frequency and finishing the measurement for the switch power working parameters. By using the method and system provided bythe invention, the measured circuit board need not be contacted, the operation is simple, safe and reliable, and the work of the measured circuit is free from being influenced. The method and system provided by the invention can be applied to the field of system test and fault diagnosis of the switch power.

The invention provides a universal magnetic force micromanipulation system and method for gas and liquid. The system comprises a magnetic probe, a gas-liquid isolation probe frame, a probe frame clamping and levelness adjustment frame, a laser, a photosensitive position sensor, XYZ nanometer and micron electrical control displacement stages and a feedback controller. The gas-liquid isolation probe frame can effectively isolate air and liquid during working under a liquid-phase environment to guarantee a working environment to be fully liquid-phase; the probe frame clamping and levelness adjustment frame can realize stable clamping and levelness adjustment of the probe frame; the XYZ nanometer and micron electrical control displacement stages and the feedback controller are used for changing a position of a sample to realize morphological and magnetic imaging of the sample. The universal magnetic force micromanipulation system and method for gas and liquid can realize morphological and magnetic domain distribution observation, analysis and manipulation of magnetic samples under gas-phase and liquid-phase environments, and are applicable to various biological materials and magnetic materials. The system structure is simple, the technique is easy to realize and the system can be widely applied in fields of biomedical and material tests.

The invention provides a portable single-cabinet ball highly-integrated seabed electromagnetic device. The electromagnetic device integrated with the single cabinet ball and is provided with an externally-arranged magnetic probe, so magnetic disturbance on elements in a cabinet is effectively reduced and measurement data is more precise. The electromagnetic device is integrated with electric field measurement, magnetic field measurement and recording functions, so the number of devices is reduced. Electrode arms are telescopic, detachable and rotatable, and can be erected, unfolded and laid flat after being thrown into sea. The electromagnetic device can autonomously sink, float and is easily thrown and positioned. It is convenient for people to operate, maintenance and use the electromagnetic device to perform construction work without the assistance of large mechanical devices like cranes. The electromagnetic device has pressure-resisting, corrosion-resisting and waterproof functions, and is capable of easily sinking or floating and recyclable and stably working under the sea. Being integrated with common uncoupling mechanisms, the electromagnetic device is highly universal. Cost for scientific research is remarkably reduced. The electromagnetic device is highly precise and automatic and suitable for field of offshore oil, mineral exploration and research for marine geological structures.