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Vehicular Instrumentation

Vehicular Instrumentation. Lee H. Eccles The need for wireless transducers in Vehicular Test Instrumentation. Long term wireless applications. These applications are long term applications where the cost of recurring maintenance (i.e. batteries) is less than the cost of things like slip rings.

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Vehicular Instrumentation

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  1. Vehicular Instrumentation Lee H. Eccles The need for wireless transducers in Vehicular Test Instrumentation

  2. Long term wireless applications • These applications are long term applications where the cost of recurring maintenance (i.e. batteries) is less than the cost of things like slip rings. • For some applications the weight of cabling makes wireless desirable. • Instrumentation of rotating parts • Rotating shafts • Helicopter rotors • Wheels/tires • Etc. Boston Sensors Expo 2002

  3. Short term wireless applications • This class of applications is characterized by the need to install test instrumentation on a vehicle for a short period of time. • The cost of maintenance is less than the cost of installing cables for the application. • The cost of installing cables is highly application dependent. Boston Sensors Expo 2002

  4. Application characteristics • Distances are limited by the size of the vehicle. • Sample rates vary from one Hz to 20,000 Hz. • Occasionally higher sample rates are required • Test duration varies from a few seconds to many hours. • Synchronous sampling is desirable. • Secure communications will be required in many applications. Boston Sensors Expo 2002

  5. Time Stamping Requirements • Time Stamping the time a sample was taken is required. • Time stamp accuracy and resolution vary with the application. • The system should be capable of providing resolution to at least 200 nanoseconds. • The relative accuracy requirement is similar. Boston Sensors Expo 2002

  6. Issues • RF interference is an issue on many vehicles, particularly aircraft. • In some applications it will be possible to cable power to the transducer and transmit the data wireless. Boston Sensors Expo 2002

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