Encoded electromagnetic based ride height sensing
First Claim
1. A vehicle having a ride height sensing system comprising:
- an electromagnetic source configured to produce a magnetic field at a specified frequency;
a magnetometer configured to measure a strength of the magnetic field; and
a controller configured to filter measurements of the magnetometer at the specified frequency to extract variance in the strength of the magnetic field associated with the electromagnetic source and determine a change in ride height of a vehicle body.
1 Assignment
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Accused Products
Abstract
Various embodiments of the present disclosure provide a ride height sensing system that includes an encoded electromagnetic source as an input unit for a Hall Effect sensors and the signal from the electromagnet is encoded to enable the rejection of ambient magnetic field. In various embodiments of the present disclosure, a band pass filter is used for signal processing of the encoded electromagnetic data. Additionally, several Hall Effect sensors may be used with a single electromagnetic source to provide multi-axis sensing and as such, provides robustness in determining ride height changes, or in the case of dependent suspensions (solid axle), a single electromagnetic source can used to determine ride height at multiple locations on the axle.
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Citations
20 Claims
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1. A vehicle having a ride height sensing system comprising:
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an electromagnetic source configured to produce a magnetic field at a specified frequency; a magnetometer configured to measure a strength of the magnetic field; and a controller configured to filter measurements of the magnetometer at the specified frequency to extract variance in the strength of the magnetic field associated with the electromagnetic source and determine a change in ride height of a vehicle body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. A ride height sensing method for a vehicle comprising:
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configuring an electromagnetic source of the vehicle to produce a magnetic field signal at a specified frequency receiving, from a magnetometer of the vehicle, measurements of a magnetic field; filtering the measurements to extract variances of strength of the magnetic field associated with the specified frequency; and determining a change in ride height of a vehicle body based on the variances of the strength of the magnetic field. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A vehicle comprising:
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a first electromagnetic source associated with a first axis of the vehicle configured to produce a first magnetic field at a first frequency; a second electromagnetic source associated with a second axis of the vehicle configured to produce a second magnetic field at a second frequency, the second frequency different from the first frequency; a magnetometer configured to measure a total magnetic field proximate the vehicle; a controller configured to; filter, at the first and second frequencies, the measurement of the total magnetic field to determine a first variance in strength of the first magnetic field and a second variance in strength of the second magnetic field; and determine a change in ride height of a body of the vehicle based on the variances of strength of the first and second magnetic fields.
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Specification