Data recorder
First Claim
Patent Images
1. A data recorder comprising:
- an angular rate sensor producing an angular rate sensor output;
a processor coupled to the angular rate sensor;
a memory coupled to the processor for storing the angular rate sensor output; and
an angular rate filter coupled between the angular rate sensor and the processor for allowing the angular rate sensor output to reach the processor only when the angular rate sensor output is within a frequency range.
1 Assignment
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Accused Products
Abstract
A compact data recorder includes angular rate sensors for monitoring rotational movement about three axes. Three linear accelerometers, or one triaxial linear accelerometer, track linear movement along the same three axes. A processor and memory record outputs from the angular rate sensors and the linear accelerometers.
50 Citations
48 Claims
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1. A data recorder comprising:
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an angular rate sensor producing an angular rate sensor output; a processor coupled to the angular rate sensor; a memory coupled to the processor for storing the angular rate sensor output; and an angular rate filter coupled between the angular rate sensor and the processor for allowing the angular rate sensor output to reach the processor only when the angular rate sensor output is within a frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A data recorder comprising:
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a first linear accelerometer producing a first linear accelerometer output; a first angular rate sensor producing a first angular rate sensor output; a memory; a processor coupled to the first linear accelerometer, the first angular rate sensor and the memory, the processor configured to store the first linear accelerometer output and the first angular rate sensor output in the memory; a first linear accelerometer filter for allowing the first linear accelerometer output to reach the processor if the first linear accelerometer output is within a first frequency range; and a first angular rate sensor filter for allowing the first angular rate sensor output to reach the processor if the first angular rate sensor output is within a second frequency range. - View Dependent Claims (19, 20)
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21. A data recorder comprising:
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an X-axis linear accelerometer producing an X-axis linear accelerometer output; a Y-axis linear accelerometer producing a Y-axis linear accelerometer output; a Z-axis linear accelerometer producing a Z-axis linear accelerometer output; a roll angular rate sensor producing a roll angular rate sensor output; a pitch angular rate sensor producing a pitch angular rate sensor output; a yaw angular rate sensor producing a yaw angular rate sensor output; a memory; a processor; a roll filter coupled between the roll angular rate sensor and the processor to allow the roll filter output to reach the processor only if the roll filter output is within a frequency range; a pitch filter coupled between the pitch angular rate sensor and the processor to allow the pitch filter output to reach the processor only if the pitch filter output is within the frequency range; and a yaw filter coupled between the yaw angular rate sensor and the processor to allow the yaw filter output to reach the processor only if the yaw filter output is within the frequency range; wherein the processor is configured to monitor the X-axis linear accelerometer, the Y-axis linear accelerometer, the Z-axis linear accelerometer, the roll angular rate sensor, the pitch angular rate sensor and the yaw angular rate sensor and to store in the memory the X-axis linear accelerometer output, the Y-axis linear accelerometer output, the Z-axis linear accelerometer output, the roll angular rate sensor output, and the pitch angular rate sensor output if one of the X-axis linear accelerometer output, the Y-axis linear accelerometer output, the Z-axis linear accelerometer output, the roll angular rate sensor output, the pitch angular rate sensor output and the yaw angular rate sensor output exceed a pre-determined threshold. - View Dependent Claims (22, 23, 24)
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25. A method of operating a self-contained data recorder, the self-contained data recorder having a housing, an angular rate sensor with an angular rate sensor output, a processor, an angular rate filter between the angular rate sensor and the processor for allowing the angular rate sensor output to reach the processor only if the angular rate sensor output is within a frequency range, a memory, and a power supply comprising the steps of:
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sampling the angular rate sensor output; comparing the angular rate sensor output with a threshold; and, if the angular rate sensor output is greater than the threshold, storing a plurality of angular rate sensor outputs in the memory. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A self contained data recorder comprising:
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a housing; a first linear accelerometer contained within the housing and producing a first linear accelerometer output; a second linear accelerometer contained within the housing and producing a second linear accelerometer output; a third linear accelerometer contained within the housing and producing a third linear accelerometer output; a first angular rate sensor contained within the housing and producing a first angular rate sensor output; a second angular rate sensor contained within the housing and producing a second angular rate sensor output; a third angular rate sensor contained within the housing and producing a third angular rate sensor output; a memory contained within the housing; a processor contained within the housing; a first angular rate sensor filter coupled between the processor and the first angular rate sensor for allowing the first angular rate sensor output to reach the processor if the first angular rate sensor output is within a frequency range; a second angular rate sensor filter coupled between the processor and the second angular rate sensor for allowing the second angular rate sensor output to reach the processor if the second angular rate sensor output is within the frequency range; a third angular rate sensor filter coupled between the processor and the third angular rate sensor for allowing the third angular rate sensor output to reach the processor if the third angular rate sensor output is within the frequency range; and and a power supply contained with the housing; wherein the processor is configured to store in the memory either the first linear accelerometer output, the second linear accelerometer output, the third linear accelerometer output, the first angular rate sensor output, the second angular rate sensor output, or the third angular rate sensor output. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification