Electromagnetic Attitude Heading Reference Sensor - EM-AHRS

A new generation of Electromagnetic (EM) survey equipment is being used extensively to assist in the delineation of oil and gas reservoirs. To optimize the resolution from this method of survey the precise heading and attitude of the EM measurement sensor is required. Zupt’s EM-AHRS delivers this through the use of combined inertial and acoustic sensors.

Upon configuration and deployment at the surface the EM-AHRS system operates fully autonomously collecting the required measurements and processing heading and attitude (pitch, roll) of the EM components.

This combined system is the first system to provide a cost effective solution based on state of the art inertial and acoustic navigation sensors. The EM-AHRS system does not use magnetic sensors for heading or attitude and as such can provide very high resolution heading and attitude data deployment after deployment with no loss of accuracy. 

The subsea packaging has been designed to fit into a small volume.

An explosion proof housed (EEX-d) option is available for a surface return angle sensor mounting below the drill floor.

Part Numbers: SH-ERA Options include connectors, mounting brackets and explosion proof housing   

EM-AHRS is a fully integrated system and includes:

• High-performance inertial sensors
• High range resolution acoustic ranging system
• Extensive configuration software for varied
• deployment scenarios.
• Simple user interface software
• I-O hardware with multiple output options
• Raw and processed data logging capability
• Audit trail for operator history logging

EM-AHRS delivers both high resolution processed data as well as all of the raw observations for QC purposes.

•         EM baseline heading    +/- 0.9° (Secant Lat)
•         Node heading                +/- 0.5° (Secant Lat)
•         Node attitude data        +/- 0.05°
•         Node depth                    +/- 0.5% water depth
•         Acoustic range resolution       +/-1.5mm

Data can be configured for any format for direct interface into EM survey software.