3d Shape Measuring Instruments Using High Stiffness Vibration Touch Sensor

Abstract

In this paper, a novel method to determine the shape of a 3D object is proposed. Instead of a flexible conventional touch probe, a high-stiffness vibration touch sensor was developed. The proposed sensor consisted of a piezo-electric device and thin probe, and generated feedback voltage according to the relative distance from the object. The structure of this sensor is simple, so that it can withstand high rates of acceleration during the measurement process. A nonlinear synchronous multi-axis control algorithm is also proposed. The effectiveness of our proposed sensor and control algorithm is demonstrated through experiments and simulations.

A Novel Method to Measure the Shape of 3D Objects Using Bilateral Vibration Touch Probe by Non-linear Synchronous Controller

“…The vibration probe can be driven at high acceleration [4], and is moved toward the object while it vibrates, and it identifies the position of the object by detecting the cessation of vibration caused by the probe touching the object's surface. Based on this principle, the PIX-30 was developed [5].…”

“…In order to demonstrate the efficacy of the proposed probe, an object of unknown shape was scanned [4], [6] and [7]. However, this controller has five numbers of gains, and their gains are decided by trial and error method.…”