Blog Layout

Preload measurement circuit for bolt-clamped ultrasonic Langevin transducers

Husain Shekhani • Oct 27, 2023

  I hosted a webinar on October 27, 2023 on

"Preload measurement circuit for bolt-clamped ultrasonic Langevin transducers"

You can watch the recording on my YouTube Channel here: 

https://youtu.be/3DMhhIglg0o


Here is a link to the presentation notes.

Here is a link to the preload calculator that I use during the webinar: Preload Calculator



Topics

In this webinar recording, I show how to measure the preload of an ultrasonic transducer stack transducer using a simple circuit and a multimeter. I provide calculations and a real demonstration.


Video outline

  • 0:29 - Outline of webinar
  • 1:50 - Bolt-clamped transducer components
  • 3:00 - Introduction to my consulting work
  • 9:32- Why do we preload?
  • 12:52 - Preloading measurement method comparison
  • 17:30 - How to determine the required preload
  • 25:00 - Theory of voltage to preload using a film capacitor circuit
  • 30:00 - 5 benefits of using a film capacitor circuit for charge measurement
  • 35:00 - Introduction to my prestress calculator
  • 37:30 - Choosing a capacitor and time constant
  • 41:30 - Options to measure preload voltage
  • 42:56 - The exact capacitor I recommend
  • 44:00 - Walkthrough of loosening and fastening a transducer and measuring preload voltage and torque
  • 46:22 - Calculation of stress from transducer used in demonstration
  • 47:25 - Weekly webinars on preloading

48:00 - Questions


***Announcement***

My next webinar will be on Friday, November 3, 2023 at 11AM EST. I will cover

"High Impedance Multimeter Modification for Ultrasonic Transducer Preload Measurement”

Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar

Follow the link here to learn about my ultrasonic transducer consulting services and prices

Services and Prices

Did you like this post?

Sign up for my email list and receive my free guide to the:

 "Top three reoccurring challenges in ultrasonic transducer development"

    Share by: