Abstract: A downhole gauge for recording data during well treatment comprised of an outer housing having pressure ports, and a pressure-tight inner housing wherein a plurality of sensors, a power source, and a memory configured to store measured data are housed. The outer housing consists of a first section having external pressure ports with a spherical outer surface and a cylindrical inner surface with a hollow lattice structure within, and a second half having no ports with a spherical outer surface and a conical inner surface with an internal hollow lattice structure within. The inner housing consists of a cylindrical body comprised of one section having no ports, and a second section having one port wherein a plurality of sensors can be affixed. The inner housing sections are releasably coupled to form a pressure-tight seal. Further, the outer housing sections are releasably coupled and enclose the inner housing therein.

Abstract: A downhole gauge for recording data during well treatment comprised of an outer housing having pressure ports, and a pressure-tight inner housing wherein a plurality of sensors, a power source, and a memory configured to store measured data are housed. The outer housing consists of a first section having external pressure ports with a spherical outer surface and a cylindrical inner surface with a hollow lattice structure within, and a second half having no ports with a spherical outer surface and a conical inner surface with an internal hollow lattice structure within. The inner housing consists of a cylindrical body comprised of one section having no ports, and a second section having one port wherein a plurality of sensors can be affixed. The inner housing sections are releasably coupled to form a pressure-tight seal. Further, the outer housing sections are releasably coupled and enclose the inner housing therein.

Abstract: A method for treatment using a cutting arrangement includes providing a rotor blade of a wind turbine and attaching an alignment tool to the rotor blade. The alignment tool includes at least one fixation means for fixing the alignment tool to proximate a trailing edge of the rotor blade that is a structure attachable to a first surface and a second opposing surface of the rotor blade. The alignment tool further includes at least one guiding structure operably connected to the fixation means that is configured to embrace the leading edge of the rotor blade and includes at least one groove or at least one edge that provides guidance for a cutting edge of a cutting apparatus. The method includes treating the rotor blade using the cutting apparatus, in which the cutting edge of the cutting apparatus is guided by the at least one guiding structure of the alignment tool.

Abstract: A method for treatment using a cutting arrangement includes providing a rotor blade of a wind turbine and attaching an alignment tool to the rotor blade. The alignment tool includes at least one fixation means for fixing the alignment tool to proximate a trailing edge of the rotor blade that is a structure attachable to a first surface and a second opposing surface of the rotor blade. The alignment tool further includes at least one guiding structure operably connected to the fixation means that is configured to embrace the leading edge of the rotor blade and includes at least one groove or at least one edge that provides guidance for a cutting edge of a cutting apparatus. The method includes treating the rotor blade using the cutting apparatus, in which the cutting edge of the cutting apparatus is guided by the at least one guiding structure of the alignment tool.

Abstract: Provided is an alignment tool for a cutting arrangement including a cutting apparatus with a cutting edge for treatment of a workpiece, especially a rotor blade of a wind turbine, in which the alignment tool includes at least one fixation means for fixing the alignment tool to the workpiece and at least one guiding structure to guide the cutting edge of the cutting tool.

Abstract: Provided is a protective cover system including a first protective cover and a second protective cover, both include a polymer and being pre-formed into a curved shape so as to accommodate at least a part of a wind turbine blade to be protected, each of the first and second protective covers has a tip end and a root end, wherein the first protective cover includes a first overlap portion at the root end, and the second protective cover includes a second overlap portion at the tip end, wherein the shape of the first overlap portion is substantially complementary to the shape of the second overlap portion such that when overlapping the first and second overlap portions, the resulting cross section of the overlapped overlap portions substantially corresponds to the cross sections of at least one of the first and second protective covers outside the overlap portions.

Abstract: The disclosure describes soft limiting electrical signals generated by a transducer before amplification, buffering or other signal conditioning in a microphone assembly, circuits and methods therefor. The soft limiting circuit includes a first circuit portion that limits a first portion of the electrical signal with reduced distortion when the first portion of the signal exceeds a threshold. A second circuit portion of the soft limiting circuit similarly limits a second portion of the electrical signal. In this way, overloading of an amplifier is avoided without excessive distortion.

Abstract: Provided is a protective cover system including a first protective cover and a second protective cover, both include a polymer and being pre-formed into a curved shape so as to accommodate at least a part of a wind turbine blade to be protected, each of the first and second protective covers has a tip end and a root end, wherein the first protective cover includes a first overlap portion at the root end, and the second protective cover includes a second overlap portion at the tip end, wherein the shape of the first overlap portion is substantially complementary to the shape of the second overlap portion such that when overlapping the first and second overlap portions, the resulting cross section of the overlapped overlap portions substantially corresponds to the cross sections of at least one of the first and second protective covers outside the overlap portions.

Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining a thermal capacity of a chopper resistor of the renewable energy generator; calculating, based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating the renewable energy generator to output active power at the calculated rate of change limit level.

Abstract: The disclosure describes soft limiting electrical signals generated by a transducer before amplification, buffering or other signal conditioning in a microphone assembly, circuits and methods therefor. The soft limiting circuit includes a first circuit portion that limits a first portion of the electrical signal with reduced distortion when the first portion of the signal exceeds a threshold. A second circuit portion of the soft limiting circuit similarly limits a second portion of the electrical signal. In this way, overloading of an amplifier is avoided without excessive distortion.

Abstract: Provided is an alignment tool for a cutting arrangement including a cutting apparatus with a cutting edge for treatment of a workpiece, especially a rotor blade of a wind turbine, in which the alignment tool includes at least one fixation means for fixing the alignment tool to the workpiece and at least one guiding structure to guide the cutting edge of the cutting tool.

Abstract: A system and method for cylinder deactivation in a multi-cylinder diesel engine comprises pumping air in to an intake manifold of the diesel engine using a turbocharger. Air is pumped in to the intake manifold using an intake air assisting device. And, fuel injection is selectively deactivated to at least one of the cylinders in the diesel engine. An intake valve and an exhaust valve is selectively deactivated for the at least one of the cylinders of the diesel engine.

Abstract: A linear variable differential transformer (LVDT) for monitoring engine valve position is disclosed. The system includes a valve guide having an elongated recess through it. The engine valve has a valve head and a valve stem with two adjacent materials having different magnetic properties meeting at an interface. The valve stem fits and moves linearly within the valve guide, and the valve head closes an engine combustion chamber. It also includes monitoring coils within the valve guide that create a signal related to the position of the interface within the valve guide. An engine control unit (ECU) is coupled to the monitoring coils and receives and analyzes the signal from the monitoring coils to determine operation of the valve.

Abstract: An anti-rotation guide for a lifter in an overhead valve valvetrain. The anti-rotation guide includes a plug having two lobes connected through a neck region. A first lobe of the plug is held within a bore in the lifter. The bore forms an opening at the edge of the lifter through which the neck of the plug emerges. The bore in the lifter accommodates a first lobe of the plug that is wider than the opening in the edge of the lifter, whereby the plug is shaped to prevent its slipping from the lifter through the opening. The lifter reciprocates in a first bore in the cylinder head. The second lobe of the plug extends outward from the lifter into a second bore formed in the cylinder head and adjoining the first bore. The second lobe reciprocates in the second bore and limits rotation of the lifter.

Abstract: An apparatus includes a microelectromechanical system (MEMS) device having a diaphragm and a back plate; a clipping circuit coupled to the MEMS device, wherein the clipping circuit is configured to clip an output signal of the MEMS device so that the maximum signal drawn by a buffer is substantially constant over a temperature range; and an integrated circuit coupled to the clipping circuit, the integrated circuit including the buffer.

Abstract: A system for controlling variable valve actuation in an automobile engine. A first cam has a first lift profile and a second cam has a second lift profile. A rocker arm assembly engages the cams having a first arm for riding on the first cam, and a second arm for riding on the second cam. The second arm has an activatable latch capable of securing the second arm to the first arm when latched. When the first arm is secured to the second arm, the rocker arm assembly achieves a first lift profile and when the first arm is not secured to the second arm, the rocker arm assembly achieves a second lift profile. A non-contact sensor mounted adjacent the rocker arm assembly is adapted to monitor and create data indicative of whether the first arm is secured to the second arm.

Abstract: A system and method for cylinder deactivation in a multi-cylinder diesel engine comprises pumping air in to an intake manifold of the diesel engine using a turbocharger. Air is pumped in to the intake manifold using an intake air assisting device. And, fuel injection is selectively deactivated to at least one of the cylinders in the diesel engine. An intake valve and an exhaust valve is selectively deactivated for the at least one of the cylinders of the diesel engine.

Abstract: A driver, includes a driver block, a controller block, and a comparison block. The driver block includes an adjustable current source configured to produce a digital output stream. The controller block is coupled to the driver block. The comparison block is coupled to the driver block and the controller block. The comparison block is configured to compare the digital output stream to a reference value at a time delayed with respect to a master clock and based upon the comparison cause the controller block to adjust a strength of the driver block.

Abstract: A method for adding fluid to an hydraulic lash adjuster (HLA) comprises the steps of placing the HLA in to a centrifuge, the centrifuge having a fluid container, placing a sufficient amount of a first fluid in the fluid container to fluidly communicate with at least one fluid port of the HLA, and spinning the HLA at a first speed sufficient to move the first fluid in to at least the second of two fluid chambers in the HLA.