For each test, the bias field was applied to the magnetostrictive element using rectangular neodymium rare-earth permanent magnets. Figure 3-10 illustrates a graph of test results for voltage output of a coil on magnetostrictive and flux path elements with load applied both elements. Figure 3-9 illustrates a graph of test results for voltage output of a coil on magnetostrictive and flux path elements with load applied only to one elements.
Figure 2-10 illustrates one embodiment of power take-off (PTO) module for magnetostrictive performance testing. In addition, the number of energy generating devices 100 installed at a particular location, or along a particular drill string, can be varied to produce different power levels. Some embodiments may include power management strategies to optimize the delivered power from a suite of devices distributed across the length of the drill string and/or BHA. The embodiments include a device for generating electricity, the device at least one magnetostrictive element and one or more electrically conductive coils or circuits. In one embodiment, the device includes at least one magnetostrictive element and one or more electrically conductive coils or circuits.
Dolor Neuropatico Herpes
Attached to the surface of the pipe 102 in a radial direction is a magnetostrictive alloy rod 104 that is contained within a “cage” 106. The cage 106 consists of magnetically permeable material 104 and bias magnets 108. The cage 106 serves to create a closed path flux loop that includes the magnetostrictive alloy rod 104. On the top surface of the magnetostrictive alloy rod 104 and flux cage 106 is a mechanism 110 for generating load changes on the magnetostrictive alloy rod 104. This loading mechanism 110 includes an impact head 112 that makes contact with the rock wall (not shown) in the drill hole and a compression spring 114. As the distance between the central drill pipe 102 and the rock wall changes, the force being applied to the compression spring 114 changes. However, in this case, the impact force load from contacting the rock wall is used to drive a piston rod 122 in an oscillating linear motion.
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The attachment structure attaches the apparatus to a wall of an elongated structure that experiences vibrations. The electrical circuit or coil is disposed within a vicinity of the magnetostrictive element which experiences the force. Figure 2-13 illustrates one embodiment of a spar buoy, tethers, and PTO modules (located serially within the tether lengths) modeled in OrcaFlex.
- The speed of the wind; and/or
- En primer lugar, deberemos lavar las semillas de lino
- Traumatismos y microtraumatismos
- Bajo pH (acidez)
In one embodiment, the energy generating device 140 has a central hole 142 through which drilling mud may flow. The spacing of the energy generating devices 100 along the drill pipe 102 can be done in such a way as to not impede the return flow of the drilling mud that typically flows back up the annular hole between the outside surface of the drill pipe 102 and inside surface of the rock drill hole (i.e., the space in which the energy generating device 100 is installed).. Causas de dolor en el hombro izquierdo