EADS standardises on Sequoia HFM for Ariane V sensors

Citation

(2005), "EADS standardises on Sequoia HFM for Ariane V sensors", Sensor Review, Vol. 25 No. 4. https://doi.org/10.1108/sr.2005.08725dab.003

EADS standardises on Sequoia HFM for Ariane V sensors

EADS standardises on Sequoia HFM for Ariane V sensors

Keywords: Heat, Sensors

HFM heat flux microsensors supplied by Sequoia Technology are specified as standard by EADS for use in the heavy-lift Ariane 5 ECA, to monitor the performance of the two solid propellant boosters.

The selection was made following months of approvals testing at an approved aerospace test house arranged by Sequoia. The HFM sensors replace a slug calorimeter that was previously, custom made by EADS, and offers a solution that is smaller and lighter and has a faster response time. Sequoia supplies EADS with two versions of the sensor, one to measure total heat flux, and one looking specifically at radiative heat flux over a specific area. Ten sensors are used at various points around each of the solid rocket motors, to ensure that they are burning at the correct rate.

Sequoia is now an EADS approved source for heat flux sensors, and also supplies this type of product for missile systems, and the Airbus A380. Sequoia also manufactures a custom cooling adapter for EADS which also holds an interchangeable lens dependent upon which measurement is required.

HFM heat flux sensors

Combining the industry's fastest response time (6 micro-seconds) with high maximum temperature operation and high sensitivity, the HFM sensors are used by both EADS and NASA. They are space qualified, and the sensor face can withstand temperatures of up to 8508C, making them suitable for exposure to very high bursts of energy. Temperature sensing via a thermocouple located at the sensor face eliminates hysterisis. No active driving circuit is required, simplifying integration of the sensor into various measurement systems. Absolute temperature readings can be calculated directly from the thermocouple voltage, more quickly and easily than from the output of a resistance temperature sensor.

For further details visit the web site: www.sequoia.co.uk