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Inertial measurement method, system and head-mounted display device

A technology of inertial measurement and display equipment, which is applied in the direction of navigation, instrumentation, and mechanical mode conversion through speed/acceleration measurement. The effect of real-time requirements, accelerated reading speed, and improved tracking accuracy

Active Publication Date: 2019-11-12
SHENZHEN SKYWORTH NEW WORLD TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, the existing virtual reality head-mounted display devices, augmented reality head-mounted display devices, unmanned aerial vehicles, and machine vision systems obtain poses through inertial measurement units at a slow speed, which cannot meet real-time requirements, resulting in untimely update of poses and poses. low precision

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  • Inertial measurement method, system and head-mounted display device

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Embodiment Construction

[0049] After discovering the above problems, the inventors of the present application conducted detailed research on the process of acquiring poses through inertial measurement units in existing virtual reality head-mounted display devices, augmented reality head-mounted display devices, drones, and machine vision systems. The study found that the existing virtual reality head-mounted display device, augmented reality head-mounted display device, unmanned aerial vehicle and machine vision system, etc. obtain the measurement data of the inertial measurement unit, and the central processing unit directly reads it through the SPI, IIC bus or USB bus. Take the measurement data from the inertial measurement unit.

[0050]The basic process for the central processing unit to directly read the measurement data of the inertial measurement unit through the SPI or IIC bus is: the application program (central processing unit) reads the data to the driver of the inertial measurement unit th...

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Abstract

The invention provides an inertia measuring method and system and a head-mounted display device. The inertia measuring method is applied to the inertia measuring system. The method comprises the stepsthat a microprocessor defines multiple synchronous fields, and reads measuring data of an inertia measuring unit at high frequency, the measuring data is related to one of the multiple synchronous fields, and the measuring data with the synchronous fields is generated and sent to a first-in first-out storage; a direct memory access controller moves the measuring data with the synchronous fields from the first-in first-out storage to a shared memory; a central processing unit reads the measuring data from the shared memory according to the synchronous fields of the measuring data with the synchronous fields, and poses are obtained according to the measuring data. According to the inertia measuring method and system and the head-mounted display device, when the measuring data is read, switching between the user state and the kernel mode, interrupt processing and possible process scheduling are avoided, the measuring data reading speed is increased, attitude and position calculation canmeet the requirement for real-time performance, and then the tracking precision is improved.

Description

technical field [0001] The present invention relates to the technical fields of data transmission and virtual reality, in particular to an inertial measurement method, system and head-mounted display device. Background technique [0002] An inertial measurement unit (IMU) is a device that measures the three-axis attitude angle (or angular rate) and acceleration of an object. Generally, an inertial measurement unit includes three single-axis accelerometers and three single-axis gyroscopes, which are used to measure the angular velocity and acceleration of an object in three-dimensional space, and calculate the pose of the object based on this. In addition, an inertial measurement unit can also include three single-axis magnetometers, which are used to test the strength and direction of the magnetic field, combined with accelerometers and gyroscopes, to solve more accurate or more informative poses. At present, inertial measurement units are often used in virtual reality head...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28G06F13/38G01C21/16G06F3/01
CPCG01C21/16G06F3/011G06F13/28G06F13/385
Inventor 不公告发明人
Owner SHENZHEN SKYWORTH NEW WORLD TECH CO LTD
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