Spin sensor for low spin munitions
First Claim
1. A spin sensor, comprising:
- a fuze housing;
a sense weight for providing an inertial mass; and
a rotating induction device comprising;
a first element affixed to the fuze housing via attachments extending between the fuze housing and the first element;
a second element affixed to the sense weight via a shaft, the second element inductively coupled and rotationally coupled to the first element with the second element being disposed entirely within the first element, wherein the first element and the fuze housing are configured to rotate with respect to the second element and the sense weight; and
an electrical connection configured to convey a signal developed in response to rotation of the fuze housing with respect to the sense weight;
wherein the sense weight is configured such that the inertial mass provides an angular inertial force impeding angular acceleration of the second element when the fuze housing rotates.
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Accused Products
Abstract
A spin sensor includes a fuze housing, a sense weight and a rotating induction device. The rotating induction device comprises a first rotatable element affixed to the fuze housing and a second rotatable element affixed to the sense weight. The second rotatable element is mechanically coupled to the first rotatable element such that it may rotate relative to the first rotatable element. In addition, the second rotatable element is inductively coupled to the first rotatable element such that the relative rotation between the first rotatable element and the second rotatable element generates a spin signal on an electrical connection to the rotating induction device. The spin signal may be compared to a suitable spin profile to determine if a valid spin environment is present.
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Citations
20 Claims
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1. A spin sensor, comprising:
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a fuze housing; a sense weight for providing an inertial mass; and a rotating induction device comprising; a first element affixed to the fuze housing via attachments extending between the fuze housing and the first element; a second element affixed to the sense weight via a shaft, the second element inductively coupled and rotationally coupled to the first element with the second element being disposed entirely within the first element, wherein the first element and the fuze housing are configured to rotate with respect to the second element and the sense weight; and an electrical connection configured to convey a signal developed in response to rotation of the fuze housing with respect to the sense weight; wherein the sense weight is configured such that the inertial mass provides an angular inertial force impeding angular acceleration of the second element when the fuze housing rotates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An explosive projectile, comprising:
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an encasement; an explosive material disposed within the encasement and configured for detonation; and a fuze disposed within the encasement, comprising; a fuze housing; a sense weight for providing an inertial mass; and a rotating induction device comprising; a first element affixed to the fuze housing via attachments extending between the fuze housing and the first element; a second element affixed to the sense weight via a shaft, the second element inductively coupled and rotationally coupled to the first element with the second element being disposed entirely within the first element, wherein the first element and the fuze housing are configured to rotate with respect to the second element and the sense weight; and an electrical connection generating a substantially sinusoidal spin signal responsive to the inductive coupling and having an increasing amplitude and frequency correlated with multiple relative rotations between the first element and the second element; wherein a rate of the relative rotations and the frequency of the spin signal are responsive to the inertial mass providing an angular inertial force impeding angular acceleration of the second element when the fuze housing rotates. - View Dependent Claims (17, 18, 19, 20)
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Specification