A magnetic nanoparticle imaging system has driving coils driven at multiple frequencies, the driving coils positioned to provide magnetic fields and field gradients to an imaging zone, and a static bias field magnet positioned to provide a static magnetic field and/or field gradient to the imaging zone. Magnetic sensors are positioned to sense magnetic fields from the imaging zone, and a signal processor processes signals from the sensors to find at least signal magnitude and phase at harmonics and/or intermodulation products of the multiple frequencies. In embodiments, the signal processing apparatus also determines signal magnitudes and phase of at least second and third harmonics of the first frequency, and maps location of nanoparticles in the imaging zone based upon the magnitudes of harmonics and magnitudes of the intermodulation products.

A system and method to inspect flaws associated with a part. The system includes a first image capturing device configured to capture a first set of images of the part and a computer operably associated with first image capturing device and configured to receive and analyze the first set of images. The method includes treating the part with a magnetic particle and fluorescent penetrant processing, capturing a first set of images of an outer surface of the part with the first image capturing device, and identifying a part defect with an algorithm associated with the computer.

A magnetic property determination apparatus that detects a magnetic property of each magnetic material included in a paper sheet transported through a transport path and determines the magnetic materials. The magnetic property determination apparatus includes a magnetic detection unit that generates on the transport path a bias magnetic field having a magnetic field direction inclined to a transport surface of the paper sheet by a specific angle and detects the magnetic charge of the magnetic materials by detecting variation of the bias magnetic field; and a magnetization unit that is arranged upstream of the magnetic detection unit in the transport direction and magnetizes the magnetic materials by generating on the transport path a magnetization magnetic field having a magnetic field direction oriented in a direction different from the direction of the bias magnetic field. At a position at which the magnetic detection unit detects the magnetism, the magnetic materials are in a state in which the magnetic materials are magnetized in mutually different magnetization directions according to coercive force thereof.

A magnetic property determination apparatus that detects a magnetic property of each magnetic material included in a paper sheet transported through a transport path and determines the magnetic materials. The magnetic property determination apparatus includes a magnetic detection unit that generates on the transport path a bias magnetic field having a magnetic field direction inclined to a transport surface of the paper sheet by a specific angle and detects the magnetic charge of the magnetic materials by detecting variation of the bias magnetic field; and a magnetization unit that is arranged upstream of the magnetic detection unit in the transport direction and magnetizes the magnetic materials by generating on the transport path a magnetization magnetic field having a magnetic field direction oriented in a direction different from the direction of the bias magnetic field. At a position at which the magnetic detection unit detects the magnetism, the magnetic materials are in a state in which the magnetic materials are magnetized in mutually different magnetization directions according to coercive force thereof.

The invention relates to a method for carrying out signal detection by means of magnetic particle imaging, in which method magnetic/magnetisable particles (4), arranged in the field-free region of a location-dependent magnetic field, in particular a gradient magnetic field, are magnetised by means of an excitation magnetic field that changes over time, and the harmonics (9, 15), generated by the particles (4), of the frequency of the excitation magnetic field are detected as a signal from the magnetic particles (4) by means of a receiver coil arrangement (1) which in particular surrounds the particles (4), wherein a signal-transmitting arrangement, which has an outer coil (10) and at least one inner coil (11; 16, 17) connected in series to said outer coil, is positioned within the receiver coil arrangement (1) around the particles (4), wherein the signal received from the particles (4) by the at least one inner coil (11; 16, 17) is transmitted to the outer coil (10) by current flow and is re-emitted by said outer coil, in particular as a result of which the signal (S) received directly from the particles (4) and the signal (S) received from the particles (4) indirectly by the outer coil (10) are superimposed at the receiver coil arrangement (1). The invention also relates to a signal-transmitting arrangement for a magnetic-particle-imaging scanner/spectrometer, comprising an outer coil (10) which in particular has a smaller diameter than the sample-receiving channel (2) of the scanner/spectrometer, and comprising at least one inner coil (11; 16, 17) which is arranged in the outer coil (10), preferably arranged coaxially therein, and in particular has greater diameter than a sample to be examined, wherein the outer coil (10) and the inner coil (11; 16, 17) are electrically connected in series. The invention also relates to a system comprising a magnetic-particle-imaging scanner and a signal-transmitting arrangement.

A magnetizing apparatus (1) includes an openable and closeable annular portion (3) formed by a magnet (2). The annular portion (3) includes a lock mechanism (4) configured to hold the annular portion (3) in a closed state. A magnetizing method includes an attaching step of placing an object inside the annular portion (3) by opening and closing the annular portion (3) and attaching the magnetizing apparatus (1) to the object by holding the annular portion (3) in a closed state with the lock mechanism (4), a moving step of moving the magnetizing apparatus (1) relative to the object in the axial direction of the annular portion (3) while the magnetizing apparatus (1) is attached to the object, and a detaching step, after the moving step, of releasing the lock mechanism (4) to detach the magnetizing apparatus (1) from the object.

A magnetic particle testing mechanism is provided for testing for defects in an axle of a landing gear assembly. The magnetic particle testing mechanism includes a conductor mechanism. The conductor mechanism is configured to apply a magnetic particle substance onto a portion of the axle and generate a magnetic field within or around the portion of the axle. Generating the magnetic field causes a magnetic field distortion associated with a defect in the axle that attracts the magnetic particle substance indicating a location of the defect in the axle.

A magnetic particle testing mechanism is provided for testing for defects in an axle of a landing gear assembly. The magnetic particle testing mechanism includes a conductor mechanism. The conductor mechanism is configured to apply a magnetic particle substance onto a portion of the axle and generate a magnetic field within or around the portion of the axle. Generating the magnetic field causes a magnetic field distortion associated with a defect in the axle that attracts the magnetic particle substance indicating a location of the defect in the axle.