U-Ray is an ultrasonic technology for basis-weight measurement, optimized for materials where electromagnetic methods , such as C-Rays (our capacitive technology) and M-Rays (our millimeter wave technology), are ineffective. It’s ideal for quality control of thin materials, such as battery films on metal substrates. The system consists of a transmitter above and a receiver below, with the material passing through the gap. Non-ionizing and costeffective, U-Ray can effortlessly measure through metal and semiconductive materials.
The transducer (1) is housed in a foam-lined waveguide (2) which is a rectangular or circular tube (3) with foam on the inside and an air-filled center. (4) The foam acts as an anti-reflective layer, reducing the reflection of ultrasound waves. To regulate the air within the gap and maintain consistent measurements, the transducer is enclosed in this tube. This design minimizes variations in the air gap, leading to more precise measurements. It prevents movements or disturbances from affecting the receiver. Additionally, a thin, nonwoven protective layer is included to prevent dust infiltration. (5)
The transducer is positioned at a specific distance from the material, known as the stand-off. This stand-off ensures the ultrasound waves to travel before reaching the material and receiver below. By the time the waves are detected, the transmitter has already stopped transmitting. Reducing the chances of interference by the direct coupling of the transmitted signal into the receiver.
As it can measure through metallic materials, the U-Ray sensor excellently fits solutions for battery film applications, in which coated layer thicknesses should be measured on a metal substrate.
