Wireless Integrity Sensing Platform (WISP)-EVAL
(WISP)-EVAL
Analog Devices Inc.
Wireless Integrity Sensing Platform (WISP)-EVAL
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wireless-integrity-sensing-platform-wisp-eval Wireless Integrity Sensing Platform
(WISP)-EVAL
To improve avionic asset availability, ADI developed a passive wireless integrity sensing platform (WISP). WISPs are postage stamp-sized crack sensors that use carbon nanotube technology. These sensors can be placed in difficult to access locations on aircraft where cracks are likely to occur (so-called hot spots). The passive sensor status is read wirelessly over an ultra low power Bluetooth® connection by a securely paired handheld reader that also provides wireless power to the sensor.
With no batteries and no wires, WISPs are ready to be installed on new or aging structures.
The first sensor to be integrated with WISP nodes is a carbon nanotube crack gauge, which can provide unprecedented accurate sub-millimeter fatigue crack measurements, even in harsh operating and environmental conditions. Other structural health monitoring (SHM) sensors are also in development. These sensors have well-understood physics, and, when coupled with WISP nodes, they offer a remote inspection alternative for many applications. More generally, WISP architecture will help enable condition-based maintenance for a more efficient approach to sustainment.
FCS#001=0.00 mm FCS#002=0.00 mm FCS#003=0.00 mm FCS#004=0.00 mm
Port
Aft
Fore
Starboard
For more information, contact CNT_Marketing_Support@analog.com
Fatigue Crack Check
Key Features Easy installation: no rewiring or
redesign of aircraft needed--can apply immediately to hot spots No power necessary: sensor records via permanent physical changes Carbon nanotube (CNT) polymer nanocomposite for smart, multifunctional sensing material No cables, connectors, or batteries needed for data acquisition Internet of Things (IoT) RFID-like operation
FCS#005=0.05 mm FCS#006=0.00 mm FCS#007=0.55 mm FCS#008=0.00 mm
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CNT Sensing Element
ADC
Complete Signal Chain for Structural Health Monitoring
WISP Sensor Node
RF Energy Transfer
WISP Reader and RF Energy Exciter
M4 Core + BLE Transceiver
PMU and Load Switch
RF to DC and Energy Storage
Impedance Matching
Antenna
VCO PA
RF Exciter Module
iOS/Android Phone/Tablet
System Components
Assembled WISP-Sensing Element on Flex
Exciter
WISP
Sensing Element on Flex
Specifications
Crack sensing element: Thickness: ~200 micron Mass: ~10 mg/cm2 Bend radius: ~5 mm Size: 25.4 mm × 25.4 mm Crack length accuracy 0.1 mm to 10 mm: 0.1 mm PoD 90% with 95% confidence level: 1 mm Crack length sensitivity: 0.1 mm
BLE transmit power: 20 dBm to +2 dBm BLE data link frequency: 2.4 GHz Platform form factor: 24 mm × 30 mm × 6 mm RF exciter frequency: 5.8 GHz Operating temperature range: 10°C to +65°C Range of operation: 0.5 m to 1 m
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Circuits from the Lab reference designs are built and tested by ADI engineers with comprehensive documentation and factory-tested evaluation hardware.
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For more information, contact CNT_Marketing_Support@analog.com
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