Resonance-based vector touch sensors

Elasticity Measurement of Zona Pellucida Using a Micro Tactile Sensor to Evaluate Embryo Quality

“…This was because the ultrasonic hardness tester does not have sufficiently high sensitivity. The phase shift operation made it possible to increase the signal to noise ratio of the resonator sensor remarkably, and the sensor performs with ultra-high sensitivity (almost 1,000 times higher than previous resonator sensors [22][23][24]), sufficient to measure the elasticity of a single cell with almost no deformation. If the displacement during measurement is very small, we can apply Hertz's theory to the contact between MTS and the specimen by considering the specimen as a completely elastic tissue.…”

Resonant probing system comprising a high accurate uniaxial nanoprobe and a new evaluation unit

“…The utilization of an oscillating probe tip can overcome sticking effects [4,[7][8][9]. Therefore, a semi-contact mode is realized which avoids attractions on the probe tip because capillary force depends on the contact time and the contact force [4].…”

“…Current oscillating probing systems utilize the piezoelectric effect to realize the actuator and sensor structures [4,[7][8][9]. The main problem of these systems is crosstalk caused by disturbing transversal deformations of the lateral piezoelectric actuators.…”

Setup for Triggering Force Testing of Touch Probes for CNC Machine Tools and CMMs

“…The Renishaw gram gauge was also used by Cauchick-Miguel et al to acquire the planar triggering force characteristic [3]. Woody and Smith described a new type of probe they constructed in their paper [19]. They also proposed a setup for testing the triggering force, which enabled investigation of the response of a new probe to a given force acting in a given direction.…”