摘要:
A pressure transducer having a redundant fluid pressure sensor can be used to determine if the pressure transducer needs to be recalibrated. The pressure transducer comprises a fluid pressure sensor for measuring differential pressure. The fluid pressure sensor includes a pair of substantially identical pressure sensors for providing a variable electrical output as a function of a differential fluid pressure and a reference sensor for providing an electrical output independent of the differential fluid pressure. A conditioning circuit is provided for generating a frequency-based signal whose frequency is a function of the electrical output for each fluid pressure sensor. The electrical output of the first and second pressure sensors can be compared to determine whether the pressure transducer needs to be calibrated. In one embodiment, the pressure sensors comprise variable capacitors. The first and second capacitors each have one fixed plate and one movable plate responsive to differential fluid pressure across the movable plate. The reference capacitor has two fixed plates. The first variable, second variable, and reference capacitors are all located in proximity to one another and in communication with the differential fluid pressure. The pressure transducer also includes a switching network connected to the capacitors for selectable connecting at least one of the capacitors to an electronic circuit.
摘要:
A pressure transducer having a redundant fluid pressure sensor can be used to determine if the pressure transducer needs to be recalibrated. The pressure transducer comprises a fluid pressure sensor for measuring differential pressure. The fluid pressure sensor includes a pair of substantially identical pressure sensors for providing a variable electrical output as a function of a differential fluid pressure and a reference sensor for providing an electrical output independent of the differential fluid pressure. A conditioning circuit is provided for generating a frequency-based signal whose frequency is a function of the electrical output for each fluid pressure sensor. The electrical output of the first and second pressure sensors can be compared to determine whether the pressure transducer needs to be calibrated. In one embodiment, the pressure sensors comprise variable capacitors. The first and second capacitors each have one fixed plate and one movable plate responsive to differential fluid pressure across the movable plate. The reference capacitor has two fixed plates. The first variable, second variable, and reference capacitors are all located in proximity to one another and in communication with the differential fluid pressure. The pressure transducer also includes a switching network connected to the capacitors for selectably connecting at least one of the capacitors to an electronic circuit.
摘要:
A novel flashlight assembly that includes an interface integrated into the housing thereof to facilitate mounting of the flashlight to the dovetail rail on a modern combat weapon. The outer body of the flashlight includes a head mounted to a flashlight body at one end and a tapered tail extending outwardly at the other end of the body. Further, the flashlight includes a clamping interface that is a seamless and integrated feature of the outer housing of the flashlight itself for interfacing the flashlight with a firearm. The operational modes of the flashlight are controlled by a single push button and a selector switch. To facilitate a highly compact design the flashlight employs two circuitry arrangements positioned remote from one another and in communication with one another via a single conductive trace to operate at a first signal frequency or a second signal frequency.
摘要:
The present invention provides a system, method, and apparatus for visual browsing, deep tagging, and synchronized comment regarding interactive time-based media data. Operational modules are provided that allow users to more effectively discover and preview and view time-based media in order to choose and locate sub-segments in time that are of particular user interest, and to provide user comments viewable by others on selected sections of the time-based media subject matter.
摘要:
A pressure transducer having a redundant fluid pressure sensor can be used to determine if the pressure transducer needs to be recalibrated. The pressure transducer comprises a fluid pressure sensor for measuring differential pressure. The fluid pressure sensor includes a pair of substantially identical pressure sensors for providing a variable electrical output as a function of a differential fluid pressure and a reference sensor for providing an electrical output independent of the differential fluid pressure. A conditioning circuit is provided for generating a frequency-based signal whose frequency is a function of the electrical output for each fluid pressure sensor. The electrical output of the first and second pressure sensors can be compared to determine whether the pressure transducer needs to be calibrated. In one embodiment, the pressure sensors comprise variable capacitors. The first and second capacitors each have one fixed plate and one movable plate responsive to differential fluid pressure across the movable plate. The reference capacitor has two fixed plates. The first variable, second variable, and reference capacitors are all located in proximity to one another and in communication with the differential fluid pressure. The pressure transducer also includes a switching network connected to the capacitors for selectably connecting at least one of the capacitors to an electronic circuit.
摘要:
The cove base molding strip includes a body including a planar portion having a front surface and a rear surface and a curved portion having a concave surface continuous with the front surface and a convex surface continuous with the rear surface. The rear surface includes at least a first channel. A cove anchor projects from the convex surface, and the intersection of the front surface and the rear surface define a rounded tip that projects from the planar portion.
摘要:
The present invention provides a novel operational system and electronic architectural model for organizing and improving viewing and editing of time-based video media and for overcoming the detriments required by the previous film and video industry based editing technologies. The present system enables an operator to manipulate the visual and audio perception of underlying video and audio data without changing the same. A series of metadata modules enable real-time operation and editing of video data and control of a play back module as well as an improved sharing, viewing, searching, and showing of underlying video and audio data.
摘要:
The present invention provides a system and method for enabling shared viewing and editing of time-based media with improved speed by avoiding manipulation and re-manipulation of a stored underlying video data format through the use of metadata processes and cross-linked multi-level metadata processes and systems for operating with a decision list tracking device.
摘要:
A catalytic Wittig method utilizing a phosphine including the steps of providing a phosphine oxide precatalyst and reducing the phosphine oxide precatalyst to produce the phosphine; forming a phosphonium ylide precursor from the phosphine and a reactant; generating a phosphonium ylide from the phosphonium ylide precursor; reacting the phosphonium ylide precursor with the aldehyde, ketone, or ester to form the olefin and the phosphine oxide which then reenters the cycle. The invention is also directed to a Mitsunobu reaction catalytic in phosphine.
摘要:
The present invention provides an easy to use web-based system for enabling multiple-user social browsing of underlying video/DEVSA media content. A plurality of user interfaces are employed linked with one or more underlying programming modules and controlling algorithms. A data model is similarly supported and used for managing complex social commenting and details regarding a particular video set of interest. An interest intensity measurement and mapping system and mode are provided for increased use.