Phase sensors, market

Rotational-speed and phase sensors represent the largest market by unit of all sensor types. The most important applications are ... 

The total market for rotational-speed and phase sensors is estimated to be 310 million units in 2002, increasing to 390 million units in 2008, and representing a market value of more than 1600 million. The total market is almost saturated, so new sensor types will replace the older, passive technology. 

The commercialization of inexpensive robust LED and laser diode sources down to the uv region (370 nm) and cheaper fast electronics has boosted the application of luminescence lifetime-based sensors, using both the pump-and-probe and phase-sensitive techniques. The latter has found wider application in marketed optosensors since cheaper and more simple acquisition and data processing electronics are required due to the limited bandwidth of the sinusoidal tone(s) used for the luminophore excitation. Advantages of luminescence lifetime sensing also include the linearity of the Stem-Volmer plot, regardless the static or dynamic nature of the quenching mechanism (equation 10) ... 

Angular-rate sensors are relatively new in automotive applications. They were first used in 1995 in vehicle dynamics control systems. More recent applications include navigation systems and rollover systems. Since all these systems are still in a growth phase, these sensors have a large market potential in coming years. For the year 2000, the market is estimated to be approximately 250 million, growing to more than 700 million in 2005. 

Despite the numerous reports, extensive studies of optical O2 sensors are still ongoing to improve performance, reduce cost and size, and develop an O2 sensor for in znvo applications/" The large market for O2 sensors also drives these efforts. The development of field-deployable, compact, low-cost monitors such as those based on OLEDs is therefore highly attractive for gas-phase and DO monitoring in various biological, medical, environmental, and industrial applications. "" ... 

Once an intruder is detected, sensor nodes notify the control station with an alarm. In contrast to the centralized approach, which requires maintenance of an updated status of the system in the control station, in the market-based approach, the control station will not search for a solution based on its local information, but will act as an auctioneer asking for the best price to accomplish the intruder tracking and capturing task. In this strategy, the control station will initiate the announcement phase in which it sends an auction to all available robots, informing them about the list of intruder(s) and its (their) location(s). Each robot receiving the auction will make an offer for these... 

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