# Touch Piezoelectric Sensor for Vibration Intensity Testing

## TL;DR

This paper introduces a touch-based piezoelectric sensor for quickly detecting ultrasonic vibrations on objects within a specific frequency range.

## Contribution

The novel contribution is a lightweight, ergonomic piezo sensor that detects ultrasonic vibrations without amplitude peaks or resonance issues.

## Key findings

- The sensor detects vibrations in the 20–96 kHz frequency range, common in ultrasonic systems.
- It avoids amplitude peaks and lower-mode resonances, making it suitable for rapid vibration point identification.
- The sensor is designed for quick detection, not precise amplitude measurement, aiding in device design and manufacturing.

## Abstract

The article presents research on a wide frequency range piezo sensor applied to surfaces by touch. It details the design of the piezo sensor, its operating principles, and usage characteristics. Calculations of the main vibration forms and modes, modeling, and experimental verifications are provided. The objective of the research was to create a lightweight, ergonomic device that enables quick detection and testing of ultrasonic vibrations on objects (ultrasonic concentrators, their replaceable tips, concentrator mounting structures, device casings, etc.) with a brief touch—up to 1 s. After optimizing the design parameters and conducting tests, it was determined that the piezo sensor identifies vibrations in the range of 20–96 kHz, which is a commonly used range in ultrasonic vibration systems (UVS). A distinctive feature of the sensor is that in this frequency range, it does not generate amplitude peaks, and its structural elements do not enter into the resonances of lower modes (1–5). The piezo sensor is not intended to determine precise vibration amplitudes and forms. It is designed to quickly find the points of minimum and maximum vibrations in vibrating objects, where precise measurements will later be conducted. The conducted research will assist in the design and manufacturing of such devices.