Bluetooth 4.0-based inertia motion capturing system used for realizing low-power wireless data transmission, and data transmission method thereof

A wireless data transmission and motion capture technology, which is applied in the field of inertial motion capture systems, can solve problems such as no very good solutions for data transmission schemes, achieve stable and reliable data transmission services, reliable and stable and durable data transmission services, and reduce interference.

Inactive Publication Date: 2016-05-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, MEMS-based inertial motion capture technology is in the early stages of development, and there is no very good solution for its data transmission scheme.

Method used

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  • Bluetooth 4.0-based inertia motion capturing system used for realizing low-power wireless data transmission, and data transmission method thereof
  • Bluetooth 4.0-based inertia motion capturing system used for realizing low-power wireless data transmission, and data transmission method thereof
  • Bluetooth 4.0-based inertia motion capturing system used for realizing low-power wireless data transmission, and data transmission method thereof

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Embodiment 1

[0044] An inertial motion capture system based on Bluetooth 4.0 for realizing low-power wireless data transmission, including 18 data acquisition modules, 3 sink nodes and 1 Root node, the 18 data acquisition modules are divided into 3 groups, each All the data acquisition modules in one group are wirelessly connected to 1 sink node respectively, and 3 sink nodes are respectively wirelessly connected to 1 Root node; the data acquisition module includes several sensors, MCU and a BLE module, several sensors and a BLE module Connect the MCU respectively, the sink node includes a BLE module, the Root node includes a BLE module, and the 18 data acquisition modules are respectively arranged at 18 joints of the human body, one group of upper limbs, one group of lower limbs, and one group of trunk;

[0045] The data acquisition module is used to: collect data at the corresponding joints, and transmit the data to a sink node connected to the data acquisition module;

[0046] The sink ...

Embodiment 2

[0062] The data transmission method of the inertial motion capture system described in embodiment 1, the specific steps include:

[0063] (1) The MCU obtains the motion information at each joint by reading the data on the accelerometer, the gyroscope, and the magnetometer, and the motion information includes acceleration, angular velocity and magnetic intensity, and Action information is processed by compressed quaternions and stored temporarily;

[0064] (2) send the action information at each joint place that step (1) is processed and temporarily stored to the BLE module of the sink node by the BLE module of the data acquisition module;

[0065] (3) The BLE module of the sink node sends data to the BLE module of the Root node.

[0066] The data communication between two BLE modules is realized through the GATT layer of the Bluetooth protocol stack. The GATT layer is divided into a GATT client and a GATT server. The client reads data, and the server provides data services f...

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Abstract

The invention relates to a Bluetooth 4.0-based inertia motion capturing system used for realizing low-power wireless data transmission, and a data transmission method thereof. A BLE (Bluetooth Low Energy) module is arranged at each joint of a collection object, allowing each joint to employ the Bluetooth technology to communicate with a sink node; all joints are divided into a plurality of sets, and each set is in connection with a sink node; the joint in each set can transmit data with an own sink node; the sink node performs data transmission with a Root node through a serial port, thereby forming a tree-shaped transmission network. The tree-shaped transmission network based on Bluetooth effectively overcomes the deficiency of the WiFi and Zigbee wireless technology in a motion capturing system, emancipates users from data line constraints, improves user experience and reduces the power consumption of a whole system.

Description

technical field [0001] The invention relates to a bluetooth 4.0-based inertial motion capture system for realizing low-power wireless data transmission and a data transmission method thereof, belonging to the technical field of motion capture. Background technique [0002] Since the 1980s, motion capture was initially used in human body capture. However, the motion capture system can not only capture human bodies, but also capture mechanical structures, animals, and so on. Among them, the motion capture of human body and animals has been widely used in film and television production. At the same time, motion capture is also expanding in the direction of medical treatment and virtual reality, and its development prospects are very broad. [0003] The capture of human motion data by front-end equipment is one of the key technologies of the inertial motion capture system. Therefore, how to transmit the collected data to the data processing unit in real time and correctly becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W84/18G08C17/02
CPCH04W52/0225G08C17/02H04W84/18
Inventor 陈涤侯学辉范聪聪梁昊赵森常银惠
Owner SHANDONG UNIV
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