A measurement system permits environmental, corrosion damage, and mechanical property measurements to assess protection properties of coatings. The system includes one or more multi-sensor panels, each multi-sensor panel having sensors for assessing coating barrier properties, free corrosion, and galvanic corrosion. Each multi-sensor panel is installed on a test rack that contains electronics for sensor excitation and sensor data acquisition throughout a corrosion test. Sensor data is collected, stored, and communicated to a base station. A network of multiple test racks can be supported by a base station to compare the performance of different coatings and material combinations simultaneously. The test racks can be used in accelerated atmospheric corrosion tests, outdoor test sites, or application service environments. Measurements of the capacity of a coating to maintain barrier properties, prevent free corrosion, galvanic corrosion, and environment-assisted cracking can be used to develop, select, and predict service performance of coatings.

A device for determining the parameters of strip-type superconductors includes a generator, a generator frequency-setting element, an inductance coil connected to the generator, a receiver, a receiver frequency-setting element, and an inductance coil connected to the receiver. The generator and receiver frequency-setting elements are same type narrow-band elements. The pass bands of the generator and receiver frequency-setting elements coincide through at least half of the bandwidth of the frequency-setting element having a narrower band pass width. The generator and receiver inductance coils are arranged with a gap between the same, making it possible for a strip-type superconductor to be placed between the inductance coils. The device is provided with a temperature sensor comprising a thermistor in contact with the superconductor. The device enables highly accurate and reproducible measurement results.

To provide a surface characteristics evaluation method that evaluates the residual stress in a subject made of steel material subjected to a surface modification treatment. A surface characteristics evaluation method includes a step of preparing a surface characteristics evaluation apparatus, a step of placing the subject in such a manner that an alternating magnetic field induced by a coil of the surface characteristics evaluation apparatus permeates into the steel material, a step of generating an eddy current in the subject, a step of successively changing the alternating magnetic field applied to the coil, a step of calculating the impedance Z1 for each of different frequencies from the potential difference across the coil and the value of the current flowing through the coil, a step of performing computation based on the impedance Z1, and a step of evaluating the residual stress in the steel material based on the computation result.

A quality value for a carbon ceramic brake disc (2) in a vehicle is measured by means of a measuring device (3) installed in the vehicle. The measuring device (3) with a coil (10) is located at a distance (d) from the brake disc (2) in order avoid direct physical contact with the brake disc. The impedance of the coil (10) is measured for at least two frequencies. The resulting measurement values that correlate to impedance values are introduced into a mathematical model in order to eliminate the dependence of the unknown distance (d) and to obtain a quality value dependent on the conductivity of the brake disc (2).

A wireless sensor includes at least one undulating electrical conductor. The undulating electrical conductor(s) extends along a spiral path between its first end and second end that remain electrically unconnected. Each undulating electrical conductor has inductance and capacitance wherein, in the presence of a time-varying magnetic field, the undulating electrical conductor(s) resonates to generate a harmonic response.

An apparatus for non-destructive testing of a sample includes a sample holder configured to contain or support the sample; an exciter configured to generate an oscillating electromagnetic field across the sample that operates with at least one predetermined excitation frequency; a receiver configured to detect harmonic electromagnetic signals resulting from induced electromagnetic fields oscillating with at least one frequency that is not equal to the at least one predetermined excitation frequency; a recorder configured to record the harmonic electromagnetic signals; and a processor programmed to construct an induced harmonic electromagnetic spectrum based on the harmonic electromagnetic signals.

A sensor includes a resonant transducer, the resonant transducer being configured to determine the composition of an emulsion or other dispersion. The resonant transducer has a sampling cell, a bottom winding disposed around the sampling cell, and a top winding disposed around the bottom winding. The composition of the dispersion is determined by measuring the complex impedance spectrum values of the mixture of the dispersion and applying multivariate data analysis to the values.

A surface property evaluation method includes a measurement step for acquiring the distribution of impedance in the depth direction of a test piece, and an evaluation step for evaluating the surface treatment state in the depth direction and wherein the evaluation step includes: a step for creating a reference measurement value group by preparing untreated sample, good sample, and sample to be evaluated, and calculating an impedance ratio 1 at each frequency for the untreated sample and good sample impedances; a step for creating an evaluation measurement value group by calculating an impedance ratio 2 for the impedances of untreated sample at each frequency relative to the sample to be evaluated impedances; and a step for evaluating the surface treatment state of a sample to be evaluated by comparing a reference measurement value group with the evaluation measurement value group.

Disclosed herein are a probe for a nondestructive testing device using a crossed gradient induced current and a method of manufacturing an induction coil for a nondestructive testing device. The probe for a nondestructive testing device using a crossed gradient induced current includes an induction coil formed to have a predetermined width and to generate first and second induced currents in a direction crossing each other when a current is applied from a power supply, and a magnetic sensor part installed adjacent to the induction coil so as to measure the first and second induced currents induced from the induction coil.

Systems, devices and methods for sensing moisture within an electronic device are disclosed. A device may include a housing and a display defining and exterior of an electronic device and an interior of the electronic device. Further, the device may include an integrated circuit (IC) within the electronic device and comprising a control element. The device may also include a moisture sensor such as an inductive sensor, a capacitance sensor, or both. The moisture sensor, which may be part of the IC, together with the control element may sense moisture within the electronic device