Preload measurement circuit for bolt-clamped ultrasonic Langevin transducers
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:
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