One of the functionalities that are desired in Ambient and Assisted Living systems is correct person localization at their dwelling place. One of the best-suited solutions for this function from the price and vitality effectivity factors of view are Bluetooth Low Energy -based localization techniques. Unfortunately, their localization accuracy is usually around several meters and may not be enough for detection of abnormal situations in elderly persons behavior.
Localization errors are notably high at the edges of the realm lined by the system or in closed areas corresponding to toilets or bogs. The idea proposed in the paper consist in further protection of those and other very important locations with proximity sensors. For most of the time, a user’s place is derived utilizing BLE energy measurement results only . When the user steps into the world lined by one or more proximity sensors and their presence is detected, a hybrid algorithm combining BLE and ranging results is used.
The system makes use of the truth that due to completely different anchor placement and propagation situations, accuracy of the radio maps for BLE and WiFi varies in the same places. The localization errors for both maps are estimated in the course of the map creation. During normal system operation the users are localized using both technologies concurrently and the more possible result’s chosen. The intelligent ecosystem embraces prognostics and well being management and MRO services — packaged as FlightSense — in addition to aircraft sensors, hardware and software program. UTC’s restore community, the ultimate hyperlink within the chain, backs up the opposite elements.
For each of the measurements ranging bias and standard deviation had been evaluated. The gathered results have been used to mannequin bias and normal deviation with polynomial features, which would be used within the hybrid localization algorithm. The distances measured with VL53L1X and estimated ranging bias values are shown in Figure 7.
The sensors are also suited to composite structures with their higher ranges of vibration and to engine accessories with extra demanding thermal requirements. The three-wire, stainless-steel, hermetically sealed sensor operates at temperatures ranging from minus 67 to 239 deg F. FlightSense will cover all of the references designed by UTAS, whether or not for electrical generation, air management or landing gear. In the long term, the company is not ruling out increasing its scope to other piece of kit if demand from customers is there.
