Electronic device with a gravity sensor assisted positioning

Patent metadata

Field	Value
Publication number	US-2022109966-A1
Application number	US-202017128375-A
Country	US
Kind code	A1
Filing date	Dec 21, 2020
Priority date	Oct 7, 2020
Publication date	Apr 7, 2022
Grant date	—

Abstract

An electronic device includes an indoor positioning tag and an indoor positioner. The indoor positioning tag includes a gravity sensor. The indoor positioning tag determines whether to start to transmit a wireless signal according to the acceleration magnitude, the acceleration direction, and the duration of acceleration change detected by the gravity sensor, and adjusts the frequency of the transmission interval of the wireless signal.

First claim

What is claimed is:

1 . An electronic device, comprising:
an indoor positioning tag, configured to transmit a wireless signal including an acceleration magnitude, an acceleration direction, and a duration of acceleration change; wherein the indoor positioning tag comprises a gravity sensor; the indoor positioning tag determines whether to start to transmit the wireless signal according to the acceleration magnitude, the acceleration direction, and the duration of acceleration change detected by the gravity sensor, and adjusts a frequency of transmission interval of the wireless signal.

2 . The electronic device as claimed in claim 1 , further comprising:
an indoor positioner, configured to receive the wireless signal, and determining whether the indoor positioning tag is a stationary state or in a moving state according to the acceleration magnitude, the acceleration direction, and the duration of acceleration change.

3 . The electronic device as claimed in claim 1 , wherein the indoor positioning tag determines whether to perform a coordinate axis calibration for the gravity sensor according to the acceleration magnitude and the duration of acceleration change.

4 . The electronic device as claimed in claim 1 , wherein when the acceleration magnitude is larger than a first threshold, the indoor positioning tag starts to transmit the wireless signal; and when the indoor positioning tag remains in the stationary state in a first period, the indoor positioning tag stops transmitting the wireless signal.

5 . The electronic device as claimed in claim 1 , wherein
when the acceleration direction remains the same, the acceleration magnitude is larger than a second threshold, and the duration of the acceleration magnitude larger than the second threshold is longer than a second period, the indoor positioning tag starts to transmit the wireless signal; and when the indoor positioning tag remains in the stationary state in the first period, the indoor positioning tag stops transmitting the wireless signal.

6 . The electronic device as claimed in claim 1 , wherein
when the acceleration magnitude increases linearly and the acceleration direction remains the same, the indoor positioning tag increases the frequency of the transmission interval of the wireless signal by a first frequency value; and when the acceleration magnitude increases linearly, and the acceleration direction is not consistent, the indoor positioning tag increases the frequency of the transmission interval of the wireless signal by a second frequency value; wherein the first frequency value is larger than the second frequency value.

7 . The electronic device as claimed in claim 1 , wherein
when the acceleration magnitude decreases linearly and the acceleration direction remains the same, the indoor positioning tag decreases the frequency of the transmission interval of the wireless signal by a third frequency value; and when the acceleration magnitude decreases linearly, and the acceleration direction is not consistent, the indoor positioning tag decreases the frequency of the transmission interval of the wireless signal by a fourth frequency value; wherein the third frequency value is higher than the fourth frequency value.

8 . The electronic device as claimed in claim 2 , wherein
when the acceleration magnitude is not equal to zero, the indoor positioner determines that the indoor positioning tag is in the moving state; or when the acceleration magnitude is larger than a third threshold, and the duration of the acceleration magnitude larger than the third threshold is longer than a third period, the indoor positioner determines that the indoor positioning tag is in the moving state.

9 . The electronic device as claimed in claim 2 , wherein
the indoor positioner calculates a pitch value, a roll value, and a yaw value for the indoor positioning tag according to the acceleration magnitude, the acceleration direction, and the duration of acceleration change to judge reasonable.

10 . The electronic device as claimed in claim 9 , wherein
when the indoor positioner judges reasonable, the indoor positioner determines that the indoor positioning tag is in the moving state; when the indoor positioner judges not reasonable, the indoor positioner determines that the indoor positioning tag is in the stationary state.

Assignees

• Quanta Comp Inc

Inventors

• Chang Yan-Cheng
• Kao Po-Shan
• Tseng Cheng-Yang
• Tsao Jia-Yang

Classifications

• G01C21/206

  specially adapted for indoor navigation · CPC title

• H04W4/33 Primary

  for indoor environments, e.g. buildings · CPC title

• H04W4/027

  using movement velocity, acceleration information · CPC title

• H04W4/38

  for collecting sensor information · CPC title