SYSTEM WITH OVEN CONTROL AND COMPENSATION FOR DETECTING MOTION AND/OR ORIENTATION
First Claim
1. A system for improving accuracy in a motion or orientation sensing device, the system comprising:
- a package having an inner surface which defines an interior, and an outer surface which communicates with an ambient environment;
a heat source disposed inside the package;
at least one internal temperature sensor disposed inside the package and configured to detect a temperature inside the package;
a device disposed inside the package and configured to detect motion or orientation; and
at least one controller programmed to;
receive internal temperature signals from the at least one internal temperature sensor indicating the temperature inside the package,receive signals indicating an ambient temperature of the ambient environment;
control the heat source to achieve a desired temperature inside the package based on the temperature signals,receive signals from the device indicating detected motion or orientation, andcompensate the received signals from the device by a compensation factor that varies based on a combination of the temperature inside the package and the ambient temperature.
3 Assignments
0 Petitions
Accused Products
Abstract
Motion and/or orientation sensing systems can utilize gyroscopes, accelerometers, magnetometers, and other sensors for measuring motion or orientation of connected objects. Temperature changes affect the precision of the data output by the motion/orientation sensing device. A system is provided for controllably heating a device within a package to a desired temperature that varies based on the ambient temperature. The operating temperature of the device can then be known and controlled. The ambient temperature can be known through an ambient temperature sensor, for example. Given this information, a controller compensates the data output by the device to further improve the accuracy in the measurements. Like the amount of heating provided to the package, the amount of compensation is also based on the ambient temperature and/or the device temperature.
13 Citations
24 Claims
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1. A system for improving accuracy in a motion or orientation sensing device, the system comprising:
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a package having an inner surface which defines an interior, and an outer surface which communicates with an ambient environment; a heat source disposed inside the package; at least one internal temperature sensor disposed inside the package and configured to detect a temperature inside the package; a device disposed inside the package and configured to detect motion or orientation; and at least one controller programmed to; receive internal temperature signals from the at least one internal temperature sensor indicating the temperature inside the package, receive signals indicating an ambient temperature of the ambient environment; control the heat source to achieve a desired temperature inside the package based on the temperature signals, receive signals from the device indicating detected motion or orientation, and compensate the received signals from the device by a compensation factor that varies based on a combination of the temperature inside the package and the ambient temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computerized method of compensating an output of a sensing device configured to detect motion or orientation, the method comprising:
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receiving an internal-temperature signal, from a temperature sensor, indicating an internal temperature within a package; sending a signal to a heater to heat an interior of the package to a variable predetermined temperature; receiving output signals from a device configured to detect motion or orientation and disposed within the package indicating detected motion or orientation of the device; via a signal processor, compensating the output signals received from the device by compensation factors that vary based on the internal temperature; and outputting, from the signal processor, compensated output signals based on the compensating. - View Dependent Claims (16, 17, 18, 19)
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20. A system for improving accuracy of a motion or orientation sensing device, the system comprising:
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a package having an inner surface which defines an interior, and an outer surface which communicates with an ambient environment; a heat source disposed inside the package; a device disposed inside the package and configured to detect motion or orientation; a first temperature sensor disposed inside the package and configured to detect a first temperature of a first location; a second temperature sensor spaced from the first temperature sensor and configured to detect a second temperature of a second location; at least one controller coupled to the device, the heat source, and the first and second temperature sensors, the at least one controller programmed to; receive the first temperature from the first temperature sensor, receive the second temperature from the second temperature sensor, based on the first and second temperatures, control the heat source to achieve a desired temperature within the package, receive signals from the device indicating detected motion or orientation, determine a temperature gradient across at least a portion of the device based on the first and second temperatures, and compensate the signals received from the device by a compensation factor that is based on the temperature gradient. - View Dependent Claims (21, 22, 23, 24)
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Specification