Lab Equipment for Teaching Physics

Features

• Obvious physical phenomenon

• Stable and reliable experimental data

• Rich experiment contents, easy operation and high measurement accuracy

  
  

Introduction

Forced vibration and resonance are fundamental concepts widely utilized in engineering and scientific research. In fields like construction and machinery, understanding and controlling resonance is essential to prevent structural failures. Conversely, in applications such as petrochemical industries, resonance phenomena are harnessed in technologies like tuning-fork liquid density sensors and level sensors to detect liquid density and level height in real-time.

The LEMI-24 Apparatus of Forced Vibration and Resonance offers a hands-on approach to exploring these phenomena. The apparatus uses a tuning fork vibration system as the primary research object. Electromagnetic excitation coils generate the driving force, and the coil also functions as an amplitude sensor. The system enables users to investigate the relationship between vibration amplitude and driving force frequency, exploring key concepts such as resonance and the resonance frequency of a vibrating system.

The LEMI-24 Apparatus allows users to conduct the following experiments:

1. Study the Relationship Between Amplitude and Frequency: Investigate the behavior of the tuning fork vibration system driven by a periodically applied external force. Measure and plot the relationship between amplitude and force frequency, and identify the resonance frequency and the sharpness of the system (i.e., the Q value).

2. Explore the Mass-Frequency Relationship: Analyze how the mass of symmetrical arms on the tuning fork affects its vibration frequency. Derive a formula that links the resonance frequency (f) to the mass (m) attached to the tuning fork arms at a fixed position.

3. Measure the Mass Using Resonance Frequency: Accurately determine the mass of a pair of blocks attached to the tuning fork arms by measuring the resonance frequency of the system.

4. Investigate Damping and Structural Changes: Examine how modifying the vibration structure or adding damping affects the resonance frequency and sharpness of the tuning fork. Compare the results under different conditions.

This apparatus offers students the opportunity to gain a deeper understanding of the relationship between amplitude and frequency in forced vibration systems, investigate the resonance phenomenon, an essential principle in vibration analysis and engineering applications, experiment with mass effects on vibration frequencies and apply resonance frequency principles for mass measurement, and explore the role of damping in vibration systems and understand the significance of the Q factor (sharpness of resonance).

The detailed instruction manual provides clear experimental configurations and setup instructions, step-by-step guidance through each experiment, including data analysis and result interpretation, explanations of theoretical principles and real-world applications of forced vibration and resonance, and example results to facilitate understanding and comparisons.

Please click Experiment Theory and Contents to find more information about this apparatus. The LEMI-24 Apparatus of Forced Vibration and Resonance is an essential tool for studying the fundamental principles of vibration and resonance with real-world relevance.

Specifications

Parts List