SYSTEM AND METHOD FOR MEMS SENSOR SYSTEM SYNCHRONIZATION
First Claim
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1. A system for synchronizing sensor data, the system comprising:
- at least one module operable to, at least;
during normal operation, attempt to acquire and store sensor information at a regular target output data rate (ODR) with a target period T;
acquire and store a first sensor value at a first time;
receive an ODR sync signal;
in response to the received ODR sync signal acquire and store a second sensor value at a second time that is less than the first time plus the target period T.
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Abstract
Various aspects of this disclosure comprise systems and methods for synchronizing sensor data acquisition and/or output. For example, various aspects of this disclosure provide for achieving a desired level of timing accuracy in a MEMS sensor system, even in an implementation in which timer drift is substantial.
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Citations
23 Claims
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1. A system for synchronizing sensor data, the system comprising:
at least one module operable to, at least; during normal operation, attempt to acquire and store sensor information at a regular target output data rate (ODR) with a target period T; acquire and store a first sensor value at a first time; receive an ODR sync signal; in response to the received ODR sync signal acquire and store a second sensor value at a second time that is less than the first time plus the target period T. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for synchronizing sensor data, the system comprising:
at least one module operable to, at least; receive a first sync signal from an external source; receive a second sync signal from the external source; determine, based at least in part on an internal sensor sync clock, a time differential between the received first sync signal and the received second sync signal; determine an adjustment to the internal sensor sync clock based, at least in part, on the determined time differential and an expected time differential. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for synchronizing sensor data, the system comprising:
at least one module operable to, at least; first communicate a first sync signal to a sensor circuit; after said first communicate, receive a first counter value from the sensor circuit; second communicate a second sync signal to the sensor circuit; after said second communicate, receive a second counter value from the sensor circuit; determine, based at least in part on the first and second counter values from the sensor circuit, an adjustment to a clock circuit of the sensor circuit; and communicate information of the determined adjustment to the sensor circuit. - View Dependent Claims (18, 19, 20, 21, 22, 23)
Specification