Magnetic substance concentration measuring instrument and magnetic substance concentration measuring method

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.

Description

Technical field [0001] The invention relates to a magnetic substance concentration measurement device and a magnetic substance concentration measurement method. Background technique [0002] For example, in a prime mover such as an engine having a reciprocating member such as a piston, due to the sliding of the piston and the cylinder, abrasion occurs on the piston and the cylinder, and a magnetic body such as iron powder is generated. Moreover, when such a magnetic body is generated, the magnetic body flows together with the discharged oil in the flow path through which the discharged oil from the engine flows. Therefore, it is necessary to measure the concentration of the magnetic body contained in the discharged oil from the flow path. So as to accurately grasp the wear condition of the machine. [0003] Generally, when grasping the wear state of the machine, manually sample the lubricating oil or drain the oil and measure the concentration of the magnetic substance by chemica...

AI Technical Summary

Problems solved by technology

[0007] However, in the method of measuring the concentration of the magnetic substance by chemical means, the magnetic field of the magnetic component, and the difference in the oscillation frequency alone as in the conventional example, there is a problem that the concentration of the magnetic substance cannot be measured with high precision.

[0008] In addition, when measuring the concentration of a magnetic substance by manually sampling a fluid such as lubricating oil or discharged oil, there is a problem that it is time-consuming and must be measured at regular intervals.

Furthermore, when the conventional magnetic substance concentration measuring device is used, there is a problem that the accumulation of solid content or the change of the flow rate of the fluid causes interference, and continuous high-precision measurement cannot be performed.