A fiber-optic density sensor for monitoring the state-of-change of a lead acid battery

Journal Article · Thu Feb 01 04:00:00 EST 1990 · IEEE Transactions on Instrumentation and Measurement (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/19.50454· OSTI ID:7080401

Hancke, G P ^[1]

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1. Pretoria Univ. (South Africa). Dept. of Electrical Engineering

A fiber-optic technique for measuring specific gravity is described. This method relies on the optical power loss exhibited by fibers bent beyond a critical radius. For such fibers the loss depends on the refractive index of the surrounding medium, which is proportional to the specific gravity of this medium. The amount of leakage can be measured and related to the value of the specific gravity. It is illustrated how this technique can be applied to determine the state-of-charge of a lead acid battery whereby the index of refraction is related to the acid concentration.

• OSTI ID: 7080401
• Journal Information: IEEE Transactions on Instrumentation and Measurement (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Instrumentation and Measurement (Institute of Electrical and Electronics Engineers); (USA) Vol. 39:1; ISSN IEIMA; ISSN 0018-9456
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
BATTERY CHARGING
DENSITY
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ENERGY LOSSES
FIBER OPTICS
LEAD-ACID BATTERIES
LOSSES
OPTICAL PROPERTIES
PERFORMANCE TESTING
PHYSICAL PROPERTIES
TESTING