The photoelectric pressure transducer uses a phototube and a light source (either a stable source of light or ac modulated light) separated by a window, whose aperture is controlled by the force summing device of the pressure transducer as illustrated in the figure below:
The displacement of the force summing device modulates the quantity of incident light falling on the phototube; applied pressure or force changes the position of the force summing device which in turn changes the position of the window hence causing a change in incident light. A change in light intensity varies the photoemissive property of the photoelectric transducer/phototube at a rate approximately linear with displacement. A current (which is typically very small) is produced as a result of incident light on a phototube. This current is then amplified to provide a usable output.
You may also read:
Hydraulic systems are built in such way that they are able to move large loads…
Image source: Unsplash Innovation in aerospace engineering is accelerating, driven by rising demands for safer,…
Image source: Freepik From consumer electronics, IoT, automotive, industrial control, healthcare, communication systems to aerospace;…
Image source: Unsplash What is Biomass Energy? Biomass energy, a form of renewable energy derived…
Hydro Turbine, Image source: Energy Education Understanding Hydroelectric Power Hydroelectric power is one of the…
The term ‘flow’ can generally be applied in three distinct circumstances: Volumetric flow is the…
View Comments