Abstract: A measured value analysis apparatus includes a controller and a memory, in which the controller: selects one examination object item, which is an examination object, and a plurality of related items which are directly or indirectly related to the examination object item; creates a correlation model between measured values from past measured values of the examination object item and the plurality of related items; and calculates a predicted value of the examination object item by applying the measured values of the related items to the correlation model and calculates divergence between an actual measured value of the examination object item and the predicted value.

Abstract: [Object] Components which influence a measured value of a measurement item, which is an examination object, are calculated appropriately on the basis of the correlation between the pluralities of measurement items. [Solution] A measured value analysis apparatus includes a controller and a memory wherein the controller: selects one examination object item, which is an examination object, and a plurality of related items which are directly or indirectly related to the examination object item; creates a correlation model between measured values from past measured values of the examination object item and the plurality of related items; and calculates a predicted value of the examination object item by applying the measured values of the related items to the correlation model and calculates divergence between an actual measured value of the examination object item and the predicted value.

Abstract: A magnetic particle producing part including magnetic and counterpart members in a path of a particle-includable liquid, at least one of the members being moved to press the other member in the liquid, the magnetic member being worn by particles in the liquid to produce magnetic particles; a magnetic particle measuring part positioned in the path same as in the producing part to measure the magnetic particle concentration in the liquid; and a control part converting the concentration of the magnetic particles detected by the measuring part into a concentration of particles in the liquid on the basis of a calibration line representing a correlation preliminarily measured between the concentrations of the magnetic particles and of the particles in the liquid to detect the concentration in the liquid.

Abstract: A piston ring is provided with a thermal spray coating that contains tungsten carbide and chrome carbide as a hard phase, and contains nickel as a metallic binder phase, and is characterized in that the thermal spray coating is formed by the spraying of a thermal spray powder that has been produced by means of a granulation sintering method, and that contains hard particles in which the mean particle diameter of the tungsten carbide has been adjusted by means of a BET method to fall within a range of not less than 0.15 ?m and not more than 0.45 ?m.

Abstract: Magnetic and counterpart members are immersed in a liquid which may include hard particles. At least one of the members is moved while pressed to the other member. The magnetic member is worn by hard particles in the liquid to produce magnetic particles in the liquid. A concentration of the magnetic particles produced is measured and is converted into a concentration of hard particles in the liquid on the basis of a calibration line representing a correlation measured in advance between the concentrations of the magnetic particles and of the hard particles in the liquid. Thus, the concentration of the hard particles in the liquid is detected.

Abstract: A magnetic particle producing part including magnetic and counterpart members in a path of a particle-includable liquid, at least one of the members being moved to press the other member in the liquid, the magnetic member being worn by particles in the liquid to produce magnetic particles; a magnetic particle measuring part positioned in the path same as in the producing part to measure the magnetic particle concentration in the liquid; and a control part converting the concentration of the magnetic particles detected by the measuring part into a concentration of particles in the liquid on the basis of a calibration line representing a correlation preliminarily measured between the concentrations of the magnetic particles and of the particles in the liquid to detect the concentration in the liquid.

Abstract: A device for measuring a concentration of magnetic material has exciting coils 11a and an output coil 11b which generates exciting voltage when alternating current flows through the exciting coils 11a. Measurement means 6 is provided to measure variation in phase difference between voltages of the exciting and output coils 11a and 11b, so that a concentration of magnetic material is measured with high accuracy from variation in phase difference when a test object is caused to approach the exciting coil 11a or/and the output coil 11b. A minute concentration of magnetic material in the fluid is continuously measured.

Abstract: Magnetic and counterpart members 12 and 11 are immersed in a liquid which may include hard particles. At least one of the members 12 and 11 is moved while pressed to the other member. The magnetic member 12 is worn by hard particles in the liquid to produce magnetic particles in the liquid. A concentration of the magnetic particles produced is measured and is converted into a concentration of hard particles in the liquid on the basis of a calibration line representing a correlation measured in advance between the concentrations of the magnetic particles and of the hard particles in the liquid. Thus, the concentration of the hard particles in the liquid is detected.

Abstract: A detection unit 4 with detection means 3 and fluid inflow/outflow guide means 2 is connected to a passage 1 for fluid with conductive material or to a pool section 5 for pooling of the fluid. The detection unit 4 guides inflow and outflow of the fluid through the fluid inflow/outflow guide means 2 and detects a concentration of conductive material through the detection means 4. A concentration of conductive material in the fluid is continuously measured with high accuracy.

Abstract: A device for measuring a concentration of magnetic material has exciting coils 11a and an output coil 11b which generates exciting voltage when alternating current flows through the exciting coils 11a. Measurement means 6 is provided to measure variation in phase difference between voltages of the exciting and output coils 11a and 11b, so that a concentration of magnetic material is measured with high accuracy from variation in phase difference when a test object is caused to approach the exciting coil 11a or/and the output coil 11b. A minute concentration of magnetic material in the fluid is continuously measured.

Abstract: A detection unit 4 with detection means 3 and fluid inflow/outflow guide means 2 is connected to a passage 1 for fluid with conductive material or to a pool section 5 for pooling of the fluid. The detection unit 4 guides inflow and outflow of the fluid through the fluid inflow/outflow guide means 2 and detects a concentration of conductive material through the detection means 4. A concentration of conductive material in the fluid is continuously measured with high accuracy.