Abstract: 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.

Abstract: A detection apparatus (10) for detecting a backfire in a combustion chamber (31) that burns fuel supplied from a supply port includes a conduit (11) connected to an interior of the combustion chamber (31) through an opening (111) provided in a sidewall of the combustion chamber (31), a sensor (21) configured to measure a physical quantity in the interior of the combustion chamber (31) via the conduit (11), and a detector (22) that detects a backfire in the combustion chamber (31) based on a measured value of the physical quantity measured by the sensor (21). The conduit (11) includes an opening/closing part (14) that can open and close an internal space between the combustion chamber (31) and the sensor (21).

Abstract: A detection apparatus (10) for detecting a backfire in a combustion chamber (31) that burns fuel supplied from a plurality of supply ports includes a light source (12) that outputs incident light to an optical fiber (11) laid around the plurality of supply ports, a converter (13) that receives returned light from the optical fiber (11) and converts the received returned light into an electric signal, a calculator (14) that analyzes the returned light converted into an electric signal and calculates a temperature at a predetermined position of the optical fiber (11), and a detector (15) configured to detect a backfire in the combustion chamber (31) based on the calculated temperature.

Abstract: A magnetic flaw detection method includes a magnetization step (S2) of moving a magnet (21) in a predetermined direction (D) along a surface of an object (7) that is a magnetic body and subsequently removing the magnet (21) from the surface of the object (7) to magnetize a region (R) corresponding to a movement range of the magnet (21) on the object (7), a sensor arrangement step (S3) of arranging a magnetic sensor (35a) to be capable of measuring magnetic flux leakage (8) generated from an abnormal portion (72) of the region (R) that was magnetized in the object (7), and a detection step (S4) of detecting an abnormality in the region (R) with the magnetic sensor (35a) arranged by the sensor arrangement step (S3).

Abstract: A detection device includes a processor that detects a state change of a target object based on sensor value array data in which sensor values acquired from sensors are associated with array positions of the sensors, generates, with respect to two pieces of the sensor value array data for which the sensor values are acquired at different times, differential value array data, generates, from the differential value array data, two pieces of partial differential value array data, and determines presence or absence of a smooth change of the differential values in the differential value array data based on a result of threshold determination on similarity between the differential values in the two pieces of partial differential value array data and a result of threshold determination on a variance value of the differential value array data.

Abstract: An ophthalmic system for examining a subject eye of an examinee includes a plurality of examination units, a robot mechanism, and a controller. The plurality of examination units have housings different from each other, perform examinations different from each other, and include at least a first examination unit and a second examination unit. The robot mechanism has a holding unit that holds and releases either the first examination unit or the second examination unit, and a moving unit that is connected to the holding unit and moves three-dimensionally. A controller controls driving of the robot mechanism to adjust a relative positional relationship between the subject eye and the first examination unit or the second examination unit held by the holding unit. The first examination unit or the second examination unit is replaced to be held by the holding unit for performing a different examination on the subject eye.

Abstract: 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.

Abstract: A magnetic flaw detection method includes a magnetization step (S2) of moving a magnet (21) in a predetermined direction (D) along a surface of an object (7) that is a magnetic body and subsequently removing the magnet (21) from the surface of the object (7) to magnetize a region (R) corresponding to a movement range of the magnet (21) on the object (7), a sensor arrangement step (S3) of arranging a magnetic sensor (35a) to be capable of measuring magnetic flux leakage (8) generated from an abnormal portion (72) of the region (R) that was magnetized in the object (7), and a detection step (S4) of detecting an abnormality in the region (R) with the magnetic sensor (35a) arranged by the sensor arrangement step (S3).

Abstract: A thinning detection system includes a current applying apparatus configured to apply an AC current to electrodes installed on metal equipment which is a monitoring object, a magnetic-field measuring apparatus including an array of magnetic sensors configured to measure a magnetic field distribution of a surface side of the metal equipment; and a measurement managing apparatus configured to estimate a thinning distribution of the metal equipment based on a magnetic field distribution difference which is a difference between a reference magnetic-field distribution which is obtained in a case where thinning has not occurred in the metal equipment and a measurement magnetic-field distribution which is an actual measurement result.

Abstract: A thinning detection system includes a current applying apparatus configured to apply an AC current to electrodes installed on metal equipment which is a monitoring object, a magnetic-field measuring apparatus including an array of magnetic sensors configured to measure a magnetic field distribution of a surface side of the metal equipment; and a measurement managing apparatus configured to estimate a thinning distribution of the metal equipment based on a magnetic field distribution difference which is a difference between a reference magnetic-field distribution which is obtained in a case where thinning has not occurred in the metal equipment and a measurement magnetic-field distribution which is an actual measurement result.

Abstract: A current sensor includes: four magnetic sensor elements arranged within a plane orthogonal to a measured current, having a symmetrical magnetic characteristics curve, and adapted to convert a magnitude of a magnetic field into an electrical signal and output the electrical signal; a bridge circuit including the four magnetic sensor elements; and a bias magnetic field application member adapted to applying a bias magnetic field to the magnetic sensor elements.

Abstract: A conductive foreign material detecting apparatus includes an exciting coil configured to apply an AC magnetic field to a base substance through which the AC magnetic field passes, a magnetic sensor configured to detect a change of the AC magnetic field caused by a conductive foreign material on a surface of the base substance or in the base substance, a noise reduction coil configured to reduce a noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field by generating predetermined magnetic field to the AC magnetic field, and a current controller configured to control a drive current and a phase of the noise reduction coil so as to make the noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field be minimal.

Abstract: A current sensor includes: four magnetic sensor elements arranged within a plane orthogonal to a measured current, having a symmetrical magnetic characteristics curve, and adapted to convert a magnitude of a magnetic field into an electrical signal and output the electrical signal; a bridge circuit including the four magnetic sensor elements; and a bias magnetic field application member adapted to applying a bias magnetic field to the magnetic sensor elements.