A set of radial springs to bias the sensor arms of an inline pipeline inspection tool radially outward towards the pipe wall. The springs are resilient clips typically made of metal which bias adjacent sensor arms away from one another and radially outward. There are two sets of springs, a forward set and a rearward set which operate independent of each other. Each set of springs operates on a plane which is perpendicular to the axis of the body of the tool and perpendicular to the planes upon which the sensor arms extend.

A system for magnetic field testing comprising a magnetic field generation device configured to generate a magnetic field in a rotor, a plurality of magnetic field measurement devices configured to measure a magnetic field at a predetermined position on the rotor, a drive mechanism configured to rotate the rotor and a test system configured to record the plurality of magnetic field measurements as a function of an angular position of the rotor.

A conveyor belt monitoring system (100) includes a field generation array (106), a sensor array (104) and circuitry (408). The field generation array (106) is configured to generate a magnetic field. The sensor array (104) is positioned a convey or distance downstream from the field generation array and configured to measure a remaining magnetic field of a conveyor belt (102), the sensor array may include a series of sensors. The circuitry (408) is configured to determine conveyor belt characteristics of the conveyor belt based on the measured remaining magnetic field.

A conveyor belt monitoring system (100) includes a field generation array (106), a sensor array (104) and circuitry (408). The field generation array (106) is configured to generate a magnetic field. The sensor array (104) is positioned a convey or distance downstream from the field generation array and configured to measure a remaining magnetic field of a conveyor belt (102), the sensor array may include a series of sensors. The circuitry (408) is configured to determine conveyor belt characteristics of the conveyor belt based on the measured remaining magnetic field.

A sensor device is provided for use in tire inspection. The sensor device is configured for removable placement along the inner surface of the tire. The sensor device includes multiple rows of sensors, which are used to provide signals that can compensate for the effect of vibrations or mechanical agitation as the sensors are passed over the inner surface of the tire. The sensor device may have a profile that allows for placement of the multiple rows of sensors in close proximity to the inner surface of the tire.

A system and method for calibrating rigid and non-rigid arrays of 3-axis magnetometers as disclosed. Such arrays might be used to analyze structures containing ferromagnetic material. The calibration determines scale factor and bias parameters of each magnetometer in the array, and the relative orientation and position of each magnetometer in the array. Once the parameters are determined, the actual magnetic field value at the magnetometer location can be simply related to magnetometer measurements. The method and system can be used to calibrate an array of 3-axis magnetometers in aggregate as opposed to individual magnetometers. This is critical in large arrays to increasing reproducibility of the calibration procedure and decreasing time required to complete calibration procedure.

A magnetic inspection system and method for detecting and mapping magnetic anomalies in a section of pipe. The inspection system includes a probe with first and second arrays of magnetic field sensors arranged in first and second layers such that the first and second arrays are spaced from the section of pipe under inspection by different radial distances. Data from the probe is used to create a graphical representation of the inspected area.

A tire wear measurement device, according to the present invention, detects a magnetic field of a magnetic body embedded in a tread portion of a tire and measures the degree of wear of the tire from a change in the magnetic field. The tire wear measurement device includes a first magnetic field detection portion placed at a position at which the magnetic field of the magnetic body can be detected, and a second magnetic field detection portion disposed at a position at which the intensity of the magnetic field of the magnetic body differs from the intensity at the position at which the first magnetic field detection portion is disposed.

A magnetic body inspection method and magnetic body inspection apparatus (1) that has a magnet (10) and a magnetic sensor (20) that outputs electric signals. At least two electric signals are obtained by the magnetic sensor (20). A magnetic body present inside a nonmagnetic body can be detected non-destructively, by outputting the difference between the two obtained electric signals.

A magnetic body inspection method and magnetic body inspection apparatus (1) that has a magnet (10) and a magnetic sensor (20) that outputs electric signals. At least two electric signals are obtained by the magnetic sensor (20). A magnetic body present inside a nonmagnetic body can be detected non-destructively, by outputting the difference between the two obtained electric signals.