LED Based Position Volume Sensor

How Does qvla® work?

Step 1
Flood two different sized volumes with light sources of equal intensity.

Step 2
Measure the light intensity within each volume.

Step 3
The disparity between light intensities inside the volumes reveals the difference in volumes (X-Y).

Experimentation proves light intensities accurately measure volume.

Bellows expansion and/or retraction, fluctuating fluid levels and mechanical movement of walls are all examples of volume changes measurable by QVLA®.

Note
The light emitter must be uniform in its output unaffected by time, temperature or changing ambient light levels. The light emitter is synonymous with a ruler. Presently, the patented QVLA® light emitter has a frequency response > 15,000 Hz. Lifetime is calculated at greater than 100 years.

Reading the ruler is cost critical. Applying only what is needed for an application is important; analog solutions are least expensive, digital solutions with communications protocols can cost more.

The disparity between light intensities inside the volumes reveals the difference in volumes (X-Y)Equal Light Intensity
Using LED light to determine volume.
X-Y equals the volumeEqual Light Intensity
X-Y = Volume