Abstract:
A motion sensing element with position sensing includes a case, a magnet positioned within the case, a spring assembly having an electrically conductive member and a coil assembly coupled to the spring assembly. The coil assembly and magnet are moveable with respect to one another. A capacitor plate is proximate the electrically conductive member with a distance between the capacitor plate and electrically conductive member being variable as the magnet and coil assembly move. Leads connect the capacitor plate and electrically conductive member to a sensing circuit for estimating the relative positions of the magnet and coil assembly.
Abstract:
The invention describes a sensor array with digital signals transmitted over an optical fiber for seismic exploration systems. The seismic system includes a transducer for providing digital optical data signals and an optical interrogator for collecting the digital data. The transducer provides data from seismic sensors to the optical interrogator by acting on an optical carrier transmitted along the optical fiber. The system is designed to utilize known electromechanical seismic sensors with fiber optic telemetry.
Abstract:
The present invention, is a method, system and apparatus for information gathering, for example seismic data acquisition operations or utility services monitoring for homes, businesses and municipalities, using a wireless network with a virtual enabling data communication and storage over multiple environment, hardware systems and time frames. Each Seis WAN node is a node on the network. Each physical layer comprises a module with layers for a Protocol Layer (103), Media Access Control (105) layer, and a Hardware Abstraction Layer (107). These three modules, together, represent the Seis WAN node and are responsible for all communication requirements, which include receiving data, receiving packets, and sending packets.
Abstract:
The present invention provides a method and apparatus of acquiring and processing seismic data. One or more controllers (200) are each coupled to seismic sensors (110a-d) to form a line of data acquisition units (106a-d). A main controller (102) is coupled to a crossover line unit (104) and to a power supply. Power and data control is distributed among the main controller (102), the crossover line controller (104) and each of the plurality of data acquition units (106a-d).
Abstract:
A graphical user interface (GUI) and control system for controlling and testing an acoustic source. The control system includes real-time data processing of individual source near-field measured signatures and synthesis of array far-field signatures. The control system determines individual source out-of-specification conditions and computes far-field signatures based on an array configuration and, when applicable, excluding failed sources. Source, array, and troubleshooting information are presented to a user in real-time over a GUI monitor to allow informed decision-making regarding continued and/or modified survey operations and operational parameters.
Abstract:
The present invention provides a method and apparatus of acquiring and processing seismic data. One or more controllers are each coupled to seismic sensors at to each other to form a line of data acquisition units. A main controller is coupled to a crossover line unit and to a power supply. Power and data control is distributed among the main controller, the crossover line controller, and each of the plurality of data acquition units.
Abstract:
A seismic imaging apparatus (Fig. 1) and method for evaluating a reservoir. The invention includes a plurality of sensors (14) disposed in a well borehole (104) either permanently cemented in place or retrievably disposed using a series of clamps (118) to attach the sensors to the borehole wall. Each sensor uses one or more forced balanced controlled accelerometers to detect acoustic energy in the formation.
Abstract:
The present invention is directed to a hydrophone streamer (100) towable from a marine vessel on a body of water. The hydrophone streamer (100)comprises a plurality of hydrophones (102)electrically connected in parallel. Each hydrophone (102) further comprises a normally-closed pressure activated switch (108) connected in series with a hydrophone sensor (104). Each pressure switch (108) is calibrated to open at a predetermined depth in the body of water thereby disabling the associated sensor (104) without affecting operation of other hydrophones (102) in the streamer (100).
Abstract:
Method of making an acoustic transducer (20) includes the steps of: a) assembling a previously polarized crystal (36) with a pair of solid circular metal plates (24, 28) positioned to sandwich the piezoelectric ceramic crystal (36) between them, wherein an epoxy adhesive is interposed between the metal plates (24, 28) and the piezoelectric ceramic crystal (36) to form an acoustic transducer assembly (20); b) curing the acoustic transducer assembly (20) at temperatures less than 150 degrees centigrade; c) encapsulating the acoustic transducer assembly (20) in a flexible case with a polyurethane potting sealant to form a potted assembly; d) curing the potted assembly at temperatures less than 150 degrees centigrade to form a hydrophone.
Abstract:
A low-profile hydrophone module for a marine seismic system (10) includes a block (108) having a curved surface (118) and a receiving surface (130) in which an open cavity (134) is disposed, a hydrophone assembly, to which lead wires (154) attach, disposed in the cavity, lead wires which pass out of the cavity, and a sound-transmitting material which fills the cavity. In another feature, the hydrophone assembly includes a hydrophone and a baffle material (162), the baffle material enclosing the hydrophone, the cavity is sealed aroud the lead wires, the sound-transmitting material is oil (170), and a cover sealingly affixes over the cavity. In another feature, the hydrophone assembly includes a hydrophone and a frame, the cavity is sealed around the lead wires, the sound-transmitting material is a potting sealant (135), and a cover sealingly affixes over the cavity.