Optical mass gauge sensor having an energy per unit area of ...

Optical mass gauge sensor having an energy per unit area of illumination detection - US Patent 6118134 from Patent Storm. An optical mass gauge sensor is ...
www.patentstorm.us/patents/6118134-description.html

Abstract
An optical mass gauge sensor is disclosed comprising a vessel having an interior surface which reflects radiant energy at a wavelength at least partially absorbed by a fluid contained within the vessel, an illuminating device for introducing radiant energy at such wavelength into the vessel interior, and, a detector for measuring the energy per unit area of illumination within the vessel created by the radiant energy which is not absorbed by the fluid.

ScienceDirect - Cryogenics : Optical mass gauging of solid hydrogen

Justak JF, Caimi FM, Bryant CB, Hastings L. An optical mass gauge sensor for zero-g environments. In: 2003 CEC/ICMC, September 22–25, 2003, Adv Cryog Eng, ...
www.linkinghub.elsevier.com/retrieve/pii/S0011227504000645

Optical mass gauging of solid hydrogen

S. W. Van Sciver, T. Adams, F. Caimi, D. Celik, J. Justak and D. Kocak
^a National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Drive, Tallahassee, FL 32310, USA
^b FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA
^c Advanced Technology Group, Stewart, FL 34994, USA
Available online 7 May 2004.

Abstract
We have developed a prototype solid hydrogen optical mass gauge system (SHOMGS) to quantify the mass of hydrogen within a spherical container at liquid helium temperature. Monochromatic laser light of wavelength 797 nm enters a spherical vessel (d=100 mm), which is filled with a mixture of liquid helium and solid H₂ particles of various sizes. The mass of the H₂ is determined prior to insertion into the sphere by measuring the amount of gH₂ that is condensed into an injector supply reservoir. In the SHOMGS a light source undergoes multiple internal reflections by the container walls and simultaneous absorption by the sH₂ with the received signal being proportional to the mass of H₂ in the container. The measured signal from the SHOMGS is compared to the injected mass of sH₂ to quantify the performance of the device in this application.

An Optical Mass Gauge Sensor for Zero-G Environments

An Optical Mass Gauge Sensor, (OMGS) was designed, built and tested in both sub-scale and full-scale cryogenic hydrogen storage tanks. ...
www.adsabs.harvard.edu/abs/2004AIPC..710..451J

Abstract
An Optical Mass Gauge Sensor, (OMGS) was designed, built and tested in both sub-scale and full-scale cryogenic hydrogen storage tanks. The design utilized two small Optical fibers mounted flush with the surface of the tank to perform quantitative measurements. The mechanical design was subjected to elevated pressures and cryogenically shocked to determine hardware survivability. Signal processing techniques were developed to eliminate potential errors due to changes in the Optical throughput from factors such as tank wall contamination and the presence of multi-phase fluids. The OMGS was evaluated through comparison to silicon diode point sensors and continuous capacitance probes. The data was within 1% agreement. The Optical Sensor was required to measure quantities in stabilized set points and in highly volatile rapidly boiling liquid hydrogen environments. Measurements were successfully taken in all tests. Due to the nature of the design, the patented (US patent 6,118,134) OMGS concept is capable of determining fuel and oxidizer Mass quantities in low to zero gravity applications. This Sensor is noninvasive, capable of continuous cryogenic fluid management determination, and can be designed to be a fraction of the weight of existing liquid level measurement systems.