HERO/EED/EMC Solution – Temperature/Current FOT-HERO (sensor)0 pages

Key Features

Low thermal mass Extremely fast response High resolution Microns scale size Immune to electromagnetic interferences (EMI) >

Applications

Electronic Explosive Device applications (EED) >

The FOT-HERO is a fi ber optic temperature sensor specifi cally designed for use in Electronic Explosive Device (EED) and HERO-type testing applications. It offers complete immunity to electromagnetic interference and does not emit disturbing signals for the EED circuitry.

HERO Testing Temperature point measurement >

Hazards of adverse interactions between the EME and the electrical initiators or initiating systems contained within ordnance systems are referred to as HERO or Hazards of Electromagnetic Radiation to Ordnance.The FOT-HERO is a miniature fi ber optic sensor that provides reliable, precise and consistent measurements. It has a fast response time of less than 1 millisecond and, when instrumented on an EED bridgewire, the sensors response time is of 60 milliseconds for the energy-power ratio and 275 milliseconds for the tempera-
ture rise time.The operating temperature of the FOT-HERO ranges from 0ҰC to 120C (32аF to 248F). It is thus possible to establish the current-temperature relationship and use it to predict the FIRE/NO FIRE conditions of an EED for multiple frequencies of an EMI range. When EED are exposed to particular EMI frequencies, the FOT-HERO sensor can provide accurate and reliable measurements of the bridgewire tem-
perature that the system analyzes and translates into voltage readings.The FOT-HERO is compatible with FISOВs VELOCE-100 signal conditioner. The system is capable of acquiring data with a resolution of 0.03C at 0.001 second average, with a fi ber movement susceptibility of only 0.1аC peak to peak. Through the use of the VELOCE-100, which is based on cutting-edge interferometric technology, FISOs FOT-HERO fi ber optic temperature sensor is capable of providing tempera-ture measurements with a very high resolution.The low thermal mass of the sensing element does not create a heat-sink effect when in contact with the bridgewire and offers a minimal disturbance to the test conditions.The sensor is a 100-microns multimode optical fi ber. Furthermore, the system is compatible with FISOҒs optical feedthrough. The optical sensor is avail able bare or already installed on a MK1 squib. Installation service on custom squib is also available.