Abstract: A multifunction sensor provides two axes of angular rate and two axes of ear acceleration information from a single instrument. The multifunction sensor utilizes an air bearing rotor to support the spinning transducers. Angular rate measurements are made by utilizing two thin film transistors mounted on the rotor and oriented to sense strain about axes in a first plane orthogonal to the rotor spin axis. The two transducers output signals are summed to provide common mode rejection. A second set of thin film transistors are mounted on the rotor in a second plane orthogonal to that of the first set of transistors and oriented to sense strain along the axes orthogonal to the rotor spin axis. Two axes of acceleration can be measured by integrating this output signal at the proper time using a clock frequency. Angular rate and linear acceleration signals may be extracted from the rotating member via slip ring contacts or inductive pickoffs.

Abstract: A measuring device for measuring the angle of rotation of a machine shaft between a reference angular position of the shaft and the angular position at the instant of the occurring of a phenomenon caused by the operation of the machine.

Abstract: A static monitoring device (such as a corrosion coupon) manipulating apparatus for petroleum pipelines is described which allows the monitoring device to be run in and later pulled out without depressurizing the pipeline. Part of the apparatus can be removed while the monitoring device is in the pipeline, thus greatly reducing the likelihood of damage to the apparatus and pipeline. The removal of a portion of the apparatus also allows this portion to be reused to manipulate monitoring devices at different locations.