MEMS-based downhole tool incorporated in mobile inclinometric station for trajectory survey of grouped wellbores

Enhancing the mechanical resistance of micromechanical gyros

“…To reduce the structure rigidity, rather rigid high frequency ES are used (1), sound connections such as welding or soldering (2,3,4), PCBs with aluminum foundations (5, Fig. 3a), the PCB is fixed to the mounting surface on a larger area (5).…”

“…MEMS perfor mance requirements are progressively increasing due to extension of application areas featuring more influ ential external factors such as a broad range of vibra tions and shocks. MEMS devices maintaining their accuracy and other characteristics under extended range of disturbing factors are required in under ground navigation for hole making, in military tech nology, construction, all sorts of vehicles, railroad and road transport [3][4][5][6]. In these areas, MEMS resis tance (that is, survival and maintaining the accuracy) should be guaranteed in extremely harsh conditions.…”

A Novel Method of Parallel Computing Based North-Finding of the Satcom-On-The-Move System and Its Simulation

“…While the dynamic continuous rotation method, can eliminate the static error, but the dynamic error can not be eliminated, which will impact the system accuracy. With the development of the technology, the MEMS inertial devices are more and more applicated in system design [9][10][11][12][13] . The MEMS devices have the advantages of convenient mass manufacturing, system-level integration, packaging integration, lightweight, small size, economy, and so on.…”