MOTION SENSING APPARATUS AND METHOD THEREOF

• US 20130054196A1
• Filed: 08/07/2012
• Published: 02/28/2013
• Est. Priority Date: 08/26/2011
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Byoung Won Hwang, Chang Hyun Kim, Kyung Rin Kim
• Inventors: Kim, Chang Hyun, Kim, Kyung Rin, Hwang, Byoung Won
• Application Number:
  US13/569,097
• Publication Number:
  US 20130054196A1
• Time in Patent Office: Days
• US Class Current: 702/189
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: G01C 21/12 executed aboard the object being navigated; Dead reckoning
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration

Abstract

The present disclosure provides a motion sensing apparatus comprising a sensor configured to sense a motion of an object; a variation determination unit configured to determine a variation in the sensed signal provided from the sensor; an ODR control unit configured to control an output data rate (ODR) in proportion to a determination result at the variation determination unit; and a digital signal output unit configured to read the signal provided from the sensor based on the ODR controlled by the ODR control unit, and output the same as a digital value.

Claims

1. A motion sensing apparatus comprising:

a sensor configured to sense a motion of an object;

a variation determination unit configured to determine a variation in the sensed signal provided from the sensor;

an ODR control unit configured to control an output data rate (ODR) in proportion to a determination result at the variation determination unit; and

a digital signal output unit configured to read the signal provided from the sensor based on the ODR controlled by the ODR control unit, and output the same as a digital value.

2. The motion sensing apparatus according to claim 1, wherein the variation determination unit includes:

a difference value calculation unit configured to calculate a difference value Diff between the signals provided from the sensor; and

an accumulated mean value calculation unit configured to calculate an accumulated mean value of the difference values calculated at the difference value calculation unit.

3. The motion sensing apparatus according to claim 2, wherein the difference value calculation unit calculates an (n+1)th difference value Diff_n+1 by using the following equation,

Diff_n+1=d_n+1−

d_n

Where, n is a nonnegative integer including zero.

4. The motion sensing apparatus according to claim 3, wherein the accumulated mean value calculation unit calculates the difference value Diff calculated at the difference value calculation unit by using the following equation:

5. A motion sensing apparatus comprising:

a sensor configured to sense a motion of an object;

an analog circuit connected to an output terminal of the sensor, the analog circuit being configured to perform amplification and/or noise reduction on the sensed signal provided from the sensor;

an analog-to-digital converter (ADC) connected to an output terminal of the analog circuit, the ADC being configured to convert a signal of analog form provided from the analog circuit into one of digital form;

a variation determination unit configured to determine a variation in the digital signal provided from the ADC;

an output data rate control unit configured to control an output data rate (ODR) in proportion to a determination result at the variation determination unit; and

a digital signal output unit is configured to read the signal provided from the ADC and convert the same into a digital signal.

6. The motion sensing apparatus according to claim 5, wherein the variation determination unit includes:

a difference value calculation unit configured to calculate a difference value Diff between the signals provided from the ADC; and

an accumulated mean value calculation unit configured to calculate an accumulated mean value of the difference values calculated at the difference value calculation unit.

7. The motion sensing apparatus according to claim 6, wherein the difference value calculation unit calculates an (n+1)th difference value Diff_n+1 by using the following equation,

Diff_n+1=d_n+1−

d_n

where, n is a nonnegative integer including zero.

8. The motion sensing apparatus according to claim 7, wherein the accumulated mean value calculation unit calculates the difference value Diff calculated at the difference value calculation unit by using the following equation:

9. A motion sensing method comprising:

sensing a motion of an object and outputting the sensed signal;

determining a variation in the sensed signal obtained at the sensing;

adjusting an output data rate (ODR) in proportion to a determination result at the determining; and

reading the signal provided from the sensor based on the ODR adjusted at the adjusting, and outputting the same as a digital value.

10. The motion sensing method according to claim 9, wherein the determining includes:

calculating a difference value Diff between the signals obtained at the sensing; and

computing an accumulated mean value of the difference values calculated at the calculating.

11. The motion sensing method according to claim 10, wherein the calculating includes calculating an (n+1)th difference value Diff_n+1 by using the following equation,

Diff_n+1=d_n+1−

d_n

where, n is a nonnegative integer including zero.

12. The motion sensing method according to claim 11, wherein the computing includes calculating the difference value Diff calculated at the difference value calculation unit by using the following equation:

13. The motion sensing method according to claim 9, wherein the sensing further includes performing amplification and/or noise reduction on the sensed signal.

14. The motion sensing method according to claim 9, wherein the sensing further includes converting the sensed signal into a digital signal.

15. The motion sensing method according to claim 9, wherein the sensing further includes, after performing amplification and/or noise reduction on the sensed signal, converting the amplified or noise-reduced signal into a digital signal.