302 results about "Capacitive displacement sensor" patented technology

The invention discloses a design of an instrumented indenter. A driving and load testing system adopts a design that a voice-coil linear motor is connected in series with a load sensor and an indenting head subassembly; an indenting-in-sample depth testing system for a diamond indenting head adopts a design that three probe type capacitor displacement sensors are combined with a depth measuring follow-up disc; a computer control system is designed to have an open-loop working mode and a closed-loop working mode according to different test progresses, and can control the voice-coil motor, so as to control the diamond indenting head to carry out tests of indenting loading, load keeping, unloading and the like on the surface of a sample; and simultaneously, the relationship of an indenting load, an indenting depth and time can be obtained. By using the design, the influence on the measurement of an indenting-in-sample depth of the indenting head as the surface of the sample generates small-angle inclination with respect to a horizontal plane and the surface of the sample generates transitional displacement along a vertical direction due to a supporting factor or a clamping factor in a process that the sample is indented is eliminated; simultaneously, the influence of the flexibility of a frame on the measurement of the indenting-in-sample depth of the indenting head is also eliminated; and the precision of the indenting-in-sample depth of a testing indenting head is guaranteed.