SES Solid State Data Recorder - Engine Monitoring Unit

The S3DR product family is a low cost, high performance, rugged solution to the processing and data recording needs of an environmentally challenging embedded system, such as those found in aerospace, defence, naval, vehicle and safety-related or high performance industrial applications.

 

  S3DR-EMU (Engine Monitoring Unit) is a specialisation of the more generic product family providing a dedicated data acquisition and recording solution certified by the FAA for use with the Rolls-Royce Corporation Model 250-C300 (RR300) gas turbine engine.

The S3DR-EMU records power turbine and gas generator shaft speeds, engine torque and gas temperature from engine sensors and also its own internal temperature. The unit stores additional parameters such as number of engine starts and accumulated engine run time. It also detects excursions of recorded parameters outside programmable limits and records data during such events, at a higher than normal sample rate. Recording duration is in excess of 2,000 hours.

The S3DR-EMU provides a high speed USB II data download interface, to allow data to be extracted from the unit using SES developed Data Download Software.

A key feature of the S3DR-EMU is the electrical isolation offered by its input circuit design. The software and hardware design architecture is scaleable to allow the number of recorded interfaces to be expanded, if required.

Download PDF Brochure

SES Solid State Data Recorder - Engine Monitoring Unit: Features

The standard S3DR-EMU features the following specifications:

• Dimensions: 120.6mm x 38.4mm x 176.5mm
• Weight: < 750g
• Case Construction: Aluminium Alloy with Electroless Nickel plating
• Standard Data Interfaces:

• 2 x Variable Reluctance Speed Sensor
• 1 x K-type Thermocouple
• 1 x Pressure Sensor

• Recording Memory Media: Internal solid state memo
• Data Sample Rate: 1 sample per second during normal operation, 16 samples per second during incidents
• Power Requirements: < 5 Watts

Environmental Specification

• Operating Temperature: -46°C to +72°C
• Storage Temperature: -54°C to +122°C
• Temperature Variation: Tested to RTCA/DO-160D, section 5, Category B
• Altitude: Tested to RTCA/DO-160D, section 4.6.1, Category B3 From -2,000 to +25,000 ft
• Humidity: Tested to RTCA/DO-160D, section 6, Category B
• Sustained Acceleration: Tested to RTCA/DO-160D, section 7.3.2, Category B
• Shock: Tested to RTCA/DO-160D, section 7.2, Category B, 20g for 11ms in each of three axes
• Vibration: Tested to RTCA/DO-160D, section 8, Category R
• Explosion Proof: Specified to RTCA/DO-160D, section 9, Category E
• Rain: Tested to RTCA/DO-160D, section 10, Category R
• Fluid Susceptibility: Specified to RTCA/DO-160D, section 11, category F
• Sand and Dust: Tested to RTCA/DO-160D, section 12, Category D
• Fungus: Specified to RTCA/DO-160D, section 13, Category F
• Salt Spray: Specified to RTCA/DO-160D, section 14, category S
• Icing: Tested to RTCA/DO-160D, section 24, Category A
• Magnetic Effect: Tested to RTCA/DO-160D, section 15, Category Z
• Power Input: Tested to RTCA/DO-160D, section 16, Category B
• Voltage Spike: Tested to RTCA/DO-160D, section 17, Category B
• Audio Frequency Conducted Susceptibility: Tested to RTCA/DO-160D, section 18, Category B
• Induced Signal Susceptibility: Tested to RTCA/DO-160D, section 19, Category B
• RF Susceptibility: Tested to RTCA/DO-160D, section 20, Category V
• Emission of RF Energy: Tested to RTCA/DO-160D, section 21, Category L
• Lightning Induced Transients: Tested to RTCA/DO-160D, section 22, Category XXE2
• Electrostatic Discharge: Tested to RTCA/DO-160D, section 23, Category A

SES Solid State Data Recorder - Engine Monitoring Unit: Support

Data Download Software

The EMU Data Download Software (DDU) is a specialization of the SES standard REVEAL product. The DDU provides differing levels of access depending on user type.

At its simplest level it provides a quick look facility for engine statistics, faults and incidents. At its most complex, it provides engine data download facilities, graphical and tabular data displays, complex search facilities and the ability to modify incident detection threshold levels in the EMU itself.

  The EMU compares critical engine parameters against configurable exceedance limits and monitors associated engine sensors for fault conditions. If an exceedance or fault is detected, a visual and/or electrical indication is provided. Initial fault, or exceedance identification data ia accessible to the engine user via a high speed USB 2 serial port.

The DDU allows the engine manufacturer to export/review detailed data associated with exceedance events, as well as historical data from all runs of a given engine. Advanced features, such as transfer of data between units and modification of exceedance detection thresholds are available via password protected facilities.