METHOD AND APPARATUS FOR A RIGIDLY JOINED TOGETHER AND FLOATING BUCKING AND RECEIVER COIL ASSEMBLY FOR USE IN AIRBORNE ELECTROMAGNETIC SURVEY SYSTEMS

摘要

A housing and bucking coil and receiving coil system for a helicoptertowed concentric coil electromagnetic survey system that reducesmicro phonic and primary field noise. The device includes an isolationhousing, a bucking coil and receiving coil assembly with structuralmembers to rigidly join the two coils together and a suspension systemto suspend the joined bucking and receiving coils, in a floating manner,by bungee cords or similar non-metallic vibration dampening devices.A housing with dimensions large enough to enclose the suspendedbucking and receiving coil assembly that is lined with acoustic andother vibration dampening material A method for suspending thejoined bucking and receiving coil assembly that isolates the assemblyfrom vibration and at the same time keeps the coil assembly fromtwisting and turning in angular planes from the plane of the transmitter,wherein the acceptable minor motions the coil assembly will beallowed to make by the suspension system are up-down, back-forwardand left-right motions.