VR system and positioning and tracking method of VR system
A position detection device of a VR device is provided. A gear rack and a gear are provided between the left lens barrel and the right lens barrel, and the gear rack is made to be occluded with the gear. A magnet is fixed at a preset position, and a magnetic induction intensity of the magnet set based on a relative position relationship between the left lens barrel and the right lens barrel in the VR device is detected by means of a Hall sensor. A distance between the Hall sensor and the magnet is calculated according to the magnetic induction intensity. Relative movement data between the gear rack and the gear is determined based on the distance between the Hall sensor and the magnet, and then a distance between the left lens barrel and the right lens barrel is determined according to the relative movement data, and the distance between the left lens barrel and the right lens barrel is determined as a pupil distance between both eyes of a user, so that targeted image can be output based on the pupil distance.
1. A position detection device of a Virtual Reality (VR) device, the position detection device comprising a left lens barrel and a right lens barrel, wherein
a gear rack and a gear are provided between the left lens barrel and the right lens barrel, wherein the gear rack is occluded with the gear;
a magnet is arranged at a preset position which is determined based on a relative position relationship between the gear rack and the gear;
a Hall sensor is provided next to the magnet, wherein the Hall sensor is configured to detect a magnetic induction intensity of the magnet, the Hall sensor is fixedly set, and when the left lens barrel is closest to the right lens barrel, a center of the magnet is aligned with a center of the Hall sensor;
the Hall sensor is connected to a computing unit, and the computing unit is configured to calculate a distance between the Hall sensor and the magnet according to the magnetic induction intensity, and determine a distance between the left lens barrel and the right lens barrel according to the distance between the Hall sensor and the magnet; and
wherein the preset position is on the gear, the Hall sensor is set directly above the gear, and the Hall sensor is a Hall angle sensor, wherein an angle of rotation of the gear is detected by the Hall angle sensor, and the distance between the left lens barrel and the right lens barrel is calculated based on the angle of rotation.
2. The position detection device of a VR device according to claim 1 , further comprising a long sliding bar, a first sliding bar and a second sliding bar, wherein
the long sliding bar comprises a left sliding segment and a right sliding segment which are able to move relative to each other;
upper parts of the left lens barrel and the right lens barrel are fixed at the left sliding segment and the right sliding segment, respectively;
a bottom part of the left lens barrel is connected to the first sliding bar; and
a bottom part of the right lens barrel is connected to the second sliding bar.
3. The position detection device of a VR device according to claim 2 , wherein
the gear rack comprises an upper gear rack and a lower gear rack, wherein
the upper gear rack is fixed to the left sliding segment or the right sliding segment;
the lower gear rack is fixed to a lens barrel holder in an opposite direction to the upper gear rack.
4. The position detection device of a VR device according to claim 3 , wherein
the lens barrel holder comprises a left lens barrel holder and a right lens barrel holder, wherein
the left lens barrel holder is configured to support the left lens barrel and the right lens barrel holder is configured to support the right lens barrel.
5. The position detection device of a VR device according to claim 3 , further comprising an adapter unit, and a rendering unit connected to the adapter unit, wherein
the adapter unit is configured to determine the distance between the left lens barrel and the right lens barrel according to the relative movement data, and determine the distance between the left lens barrel and the right lens barrel as a pupil distance between both eyes of a user; and
the rendering unit is configured to adjust and render image data output from the VR device according to the pupil distance.
6. The position detection device of a VR device according to claim 1 , wherein
a notch mark is provided at one end of the magnet.
7. A position detection method of a Virtual Reality (VR) device, wherein the method is performed by a position detection device of a VR device according to claim 1 , and the method comprises:
detecting, by means of a Hall sensor, a magnetic induction intensity of the magnet;
calculating a distance between the Hall sensor and the magnet according to the magnetic induction intensity;
determining relative movement data between the gear rack and the gear based on the distance between the Hall sensor and the magnet; and
determining a distance between the left lens barrel and the right lens barrel according to the relative movement data, and determining the distance between the left lens barrel and the right lens barrel as a pupil distance between both eyes of a user.
8. A non-transitory computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and the computer program, when executed by a processor, implements the method according to claim 7 .
9. An electronic device, comprising a memory and a processor, wherein the memory is configured to store a computer program, and the processor is configured to run the computer program to perform the method according to claim 7 .
10. The position detection device of a VR device according to claim 1 , further comprising:
a tab, which is provided on a back side of the gear and used as a base of the gear.
11. The position detection device of a VR device according to claim 10 , further comprising:
a spring, which is attached to a back side of the tab, wherein the gear is rotatably connected to the VR device via the spring and the tab.