Apparatus and method for measuring head speed and opening angle using six sensors arranged in a rectangular format
First Claim
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1. An apparatus for measuring head speed and an opening angle of a moving head as it impacts a projectile, comprising:
- at least six sensors, four of said sensors being disposed each at a vertex of a defined rectangle and at least two of said sensors being disposed each on an opposed long side of said rectangle for detecting interception of light caused by said moving head;
an instrumentation means for measuring time differences between instants in which the moving head intercepts rays of light aimed toward the sensors, respectively; and
an arithmetic unit for calculating head speed and an opening angle on the basis of the time differences measured by said instrumentation means.
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Abstract
An apparatus and a method for measuring head speed and an opening angle. At least four sensors are disposed at each vertex of a defined rectangle. An instrumentation device measures differences in time between instants in which a moving head intercepts rays of light toward the sensors, respectively. An arithmetic unit calculates head speed and an opening angle on the basis of the measured time differences.
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Citations
6 Claims
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1. An apparatus for measuring head speed and an opening angle of a moving head as it impacts a projectile, comprising:
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at least six sensors, four of said sensors being disposed each at a vertex of a defined rectangle and at least two of said sensors being disposed each on an opposed long side of said rectangle for detecting interception of light caused by said moving head; an instrumentation means for measuring time differences between instants in which the moving head intercepts rays of light aimed toward the sensors, respectively; and an arithmetic unit for calculating head speed and an opening angle on the basis of the time differences measured by said instrumentation means. - View Dependent Claims (3, 6)
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2. An apparatus for measuring head speed and an opening angle of a moving head as it impacts a projectile, comprising:
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at least six sensors, four of said sensors being disposed each at a vertex of a defined rectangle and at least two of said sensors being disposed each on an opposed long side of said rectangle for detecting interception of light caused by said moving head; an instrumentation means for measuring time differences between instants in which the moving head intercepts rays of light aimed toward the sensors, respectively; and an arithmetic unit for calculating head speed, an opening angle, head acceleration, and a change in the opening angle on the basis of the time differences measured by said instrumentation means.
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4. A method for measuring head speed and an opening angle of a moving head as it impacts a projectile, in which four sensors are each disposed at a vertex of a defined rectangle and at least two sensors are each disposed on an opposed long side of said rectangle, comprising the steps of:
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intercepting successive rays of light aimed toward the sensors by motion of the moving head; measuring time differences between instants in which the moving head intercepts rays of light aimed toward the sensors, respectively; and calculating both a head speed and an opening angle on the basis of the measured time differences.
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5. A method for measuring head speed and an opening angle of a moving head as it impacts a projectile, in which four sensors are each disposed at a vertex of a defined rectangle and at least two sensors are each disposed on an opposed long side of said rectangle, comprising the steps of:
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intercepting successive rays of light aimed toward the sensors by motion of the moving head; measuring time differences between instants in which the moving head intercepts rays of light aimed toward the sensors, respectively; and calculating head speed, an opening angle, head acceleration, and change in the opening angle on the basis of the measuring time differences.
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Specification