System having pitch-adjusted rotational speed measurement
First Claim
1. A speed measurement system for a machine having a component rotationally mounted within a housing, the speed measurement system comprising:
- a first sensing element configured to be mounted to the housing adjacent the component and to generate a first signal indicative of a rotational velocity of the component,wherein the first sensing element includes a magnetic element, andwherein the magnetic element is configured to interact with a wheel attached to the component;
a second sensing element configured to be mounted to the housing and to generate a second signal indicative of a rotational rate of the housing; and
a controller in communication with the first sensing element and the second sensing element, the controller being configured to determine a rotational speed of the component relative to an offboard reference based on the first signal and the second signal.
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Accused Products
Abstract
A speed measurement system for use with a machine having a component rotationally mounted inside a housing may have a first sensing element configured to be mounted to the housing adjacent the component, and a second sensing element configured to be mounted to the housing. The first sensing element may be configured to generate a first signal indicative of a rotational velocity of the component. The second sensing element may be configured to generate a second signal indicative of a rotational rate of the housing. The speed measurement system may also have a controller in communication with the first and second sensing elements. The controller may be configured to determine a rotational speed of the component relative to an offboard reference based on the first and second signals.
21 Citations
18 Claims
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1. A speed measurement system for a machine having a component rotationally mounted within a housing, the speed measurement system comprising:
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a first sensing element configured to be mounted to the housing adjacent the component and to generate a first signal indicative of a rotational velocity of the component, wherein the first sensing element includes a magnetic element, and wherein the magnetic element is configured to interact with a wheel attached to the component; a second sensing element configured to be mounted to the housing and to generate a second signal indicative of a rotational rate of the housing; and a controller in communication with the first sensing element and the second sensing element, the controller being configured to determine a rotational speed of the component relative to an offboard reference based on the first signal and the second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining a rotational speed of a component rotationally mounted in a housing of a machine, the method comprising:
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sensing, using a first sensing element, a rotational velocity of the component relative to the housing, wherein the first sensing element includes a magnetic element, and wherein the magnetic element is configured to interact with a wheel attached to the component; sensing, using a second sensing element, a rotational rate of the housing; and determining the rotational speed of the component relative to an offboard reference based on the rotational velocity and the rotational rate. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A machine comprising:
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a bowl; a cushion hitch connected at a trailing end to the bowl; a tractor connected to the cushion hitch at a leading end and including; a frame; a shaft; a wheel operatively connected to the shaft; and an axle housing supporting the frame and at least partially enclosing the shaft; a speed sensor mounted inside the axle housing and configured to generate a velocity signal indicative of a rotational velocity of the shaft, wherein the speed sensor includes a magnetic element, and wherein the magnetic element is configured to interact with a wheel operatively connected to the shaft; a rotational rate gyro mounted to the frame and configured to generate a pitch rate signal indicative of a pitch rate of the tractor about the shaft; and a controller in communication with the speed sensor and the rotational rate gyro, the controller being configured to determine a rotational speed of the wheel relative to a ground surface below the machine based on the velocity signal and the pitch rate signal. - View Dependent Claims (17, 18)
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Specification