US 8989441

US patent 8989441, titled "Data acquisition method and device for motion recognition, motion recognition system and computer readable storage medium," has the following details:

• Title: Data acquisition method and device for motion recognition, motion recognition system and computer readable storage medium
• Current Assignee: Zepp North America Inc
• Inventors: Zheng Han, Xiaowei Dai, Mi Chen
• Filing Date: March 18, 2013
• Issue Date: March 24, 2015
• Abstract: A data acquisition method and device for motion recognition, a motion recognition system and a computer readable storage medium are disclosed. The data acquisition device for motion recognition comprises: an initial motion recognition module adapted to perform an initial recognition with respect to motion data collected by a sensor and provide motion data describing a predefined range around a motion trigger point to a data storage module for storage; a data storage module adapted to store motion data provided from the initial motion recognition module; and a communications module adapted to forward the motion data stored in the data storage module to a motion computing device for motion recognition. The present invention makes an initial selection to the motion data to be transmitted to the motion computing device under the same sampling rate. Consequently, the present invention reduces pressures on wireless channel transmission and wireless power consumption, and provides high accuracy in motion recognition while providing motion data at the same sampling rate.

Plain-Language Overview of Independent Claims:

US patent 8989441 includes four independent claims: Claim 1 (method), Claim 9 (device), Claim 17 (system), and Claim 18 (computer readable storage medium). Independent claims are those that do not refer to any other claims and define the broadest scope of the invention.

• Claim 1 (Method): This claim describes a method for acquiring motion data for recognition. It involves a data acquisition device with an initial motion recognition module, a data storage module, and a communications module. The core steps are:

  1. The initial motion recognition module first performs a basic recognition on motion data from a sensor. It then provides a specific segment of this data to a data storage module. This segment includes m*Fs frames of data before a detected "motion trigger point," the data at the motion trigger point itself, and n*Fs-1 frames of data after the motion trigger point. Here, 'm' and 'n' are set positive integers, and 'Fs' is the sampling rate. A "frame of motion data" is defined as all data collected by various sensors at a single moment.
  2. The communications module then sends this stored motion data to a separate motion computing device for further motion recognition.

• Claim 9 (Device): This claim defines a data acquisition device for motion recognition. The device includes:

  1. An initial motion recognition module: This module is designed to perform an initial recognition on motion data collected by a sensor. Its function is to provide m*Fs frames of motion data before a motion trigger point, the motion data at the motion trigger point, and n*Fs-1 frames of motion data after the motion trigger point to a data storage module. Again, 'm' and 'n' are predefined positive integers, and 'Fs' is the sampling rate, with one frame being data collected by various sensors at the same sampling moment.
  2. A data storage module: This module stores the motion data received from the initial motion recognition module.
  3. A communications module: This module is responsible for transmitting the data stored in the data storage module to a motion computing device for motion recognition.

• Claim 17 (System): This claim describes a motion recognition system. It comprises:

  1. A motion computing device.
  2. A data acquisition device as described in Claim 9.
     The system functions such that the motion computing device uses the motion data transmitted from the data acquisition device to perform motion recognition.

• Claim 18 (Computer Readable Storage Medium): This claim covers a computer readable storage medium. This medium stores programs that, when executed, carry out the data acquisition method for motion recognition as described in Claim 1.

CAFC 2026 Dockets Search:

A search of CAFC 2026 dockets for patent number 8989441 did not return any specific litigation entries for the year 2026. The Google Patents information for US8989441B2 indicates "Family has litigation" with a US case filed in Texas Eastern District Court (https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A26-cv-00316), and "First worldwide family litigation filed" (https://patents.darts-ip.com/?family=[48153442](/patent/48153442)&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=[US8989441](/patent/US8989441)(B2)). However, no specific dockets for 2026 in the CAFC were found with the provided search queries.