CN209805837U - VR time synchronizer - Google Patents
VR time synchronizer Download PDFInfo
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- CN209805837U CN209805837U CN201920440739.2U CN201920440739U CN209805837U CN 209805837 U CN209805837 U CN 209805837U CN 201920440739 U CN201920440739 U CN 201920440739U CN 209805837 U CN209805837 U CN 209805837U
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Abstract
The utility model discloses a VR time synchronizer, which comprises a control module and a communication module; the control module is used for controlling system clock synchronization, and the communication module is used for realizing communication among different VR time synchronizers in the virtual reality system. The VR time synchronizer is divided into a master device and a slave device, only one master device is arranged in the virtual reality system, and the other slave devices are arranged in the virtual reality system. The master device is used for transmitting a time synchronization signal to the slave device, and the slave device calibrates a self clock after receiving the time synchronization signal, so that system clock synchronization is realized. The utility model discloses a VR time synchronizer can be accurate the operation clock of adjusting the different equipment of virtual reality system, guarantees that all equipment of system are accurate leads to in step to support wired and two kinds of wireless communication mode, be applicable to multiple virtual reality scene.
Description
Technical Field
The utility model relates to a virtual reality technical field especially relates to a virtual reality time synchronizer.
Background
in recent years, the virtual reality technology is developed vigorously, people have higher and higher requirements on immersion, and the large space position interaction technology is particularly important. The large spatial location interaction technique may provide the experiencer with a way to truly "enter" the virtual world, so that the user may get a full sense of immersion. In the large spatial position interaction technology, the system synchronization technology is particularly important. In the existing virtual reality space positioning technology, no matter laser positioning, infrared optical positioning, inertial navigation positioning or hybrid positioning, no accurate synchronization of a system is needed, so that a laser transmitter, an infrared camera and the like are guaranteed to work according to a unified clock.
at present, time synchronizer products aiming at virtual reality systems are not available in the market, and various virtual reality systems need to research and develop time synchronizers adaptive to the systems of the systems by themselves. I have been dedicated to the research of various virtual reality space positioning systems such as an infrared optical positioning system, an optical inertial fusion positioning system and the like, and provide a VR time synchronizer in order to solve the time synchronization problem of various virtual reality systems.
SUMMERY OF THE UTILITY MODEL
Clock synchronization problem to the various equipment of virtual reality system, the utility model provides a VR time synchronizer.
In order to solve the technical problem, the utility model discloses a technical scheme is:
A VR time synchronizer comprises a control module and a communication module, wherein the control module is used for controlling system clock synchronization, and the communication module is used for realizing communication among different VR time synchronizers in a virtual reality system.
the control module of the synchronizer mainly comprises a microcontroller chip and a power management chip. The main functions of the control module include: clock running, interrupt processing, setting time intervals (namely synchronous signal emission periods), synchronous signal maintenance and power management.
The communication module of the synchronizer mainly comprises a wired network interface module suitable for wired synchronous communication and a wireless communication transceiver module (a 900MHz wireless radio frequency communication transceiver module or a 2.4GHz wireless communication transceiver module) suitable for wireless communication. The main functions of the communication module are communication, including: by means of the network module, communication between the master device and the slave device in wired connection is achieved; the wireless communication module is used for realizing the communication between the master device and the slave device which are in wireless connection in a large-space scene; and realizing communication between the VR time synchronizer and the virtual reality equipment attached to the VR time synchronizer. According to the different supported communication modes, the VR time synchronizer can simultaneously have a wired network interface module and a wireless transceiver module to simultaneously support both wired and wireless communication modes, or can only contain one module to support one communication mode.
Preferably, the VR time synchronizer has a master-slave division, each virtual reality system has only one master device, and the other devices are slave devices. The master device is used for transmitting VR time synchronization signals to the slave devices, granting own clocks to all the slave devices, and calibrating own clocks after the slave devices receive the time synchronization signals, so that system clock synchronization is realized. That is, the master clock is the system clock.
Preferably, the VR time synchronization slave device needs to be attached to a device that needs to implement clock synchronization in a virtual reality system, and the attachment method includes: the system is used as a module and is arranged in all equipment needing to realize clock synchronization in a virtual reality system; the device can also be directly used as an external device to be in wired connection with all devices needing to realize clock synchronization of the virtual reality system through network ports.
preferably, the VR time synchronization master device can simultaneously support two communication modes, namely wired communication and wireless communication, and simultaneously transmit the synchronization signal in the wired communication mode and the wireless communication mode according to different connection modes of different slave devices in the virtual reality space.
Preferably, the VR time synchronization slave device can support wired or wireless communication modes according to different use scenes.
the main workflow of the VR time synchronizer is briefly described as follows:
All the devices are started and initialization work is executed.
The slave device enters a waiting phase, and the execution of the clock running task is not started until the first synchronous signal is received.
And the control module controls the main device to immediately execute clock running tasks.
And the master device control module controls the wired network port module to send the synchronous signal to the wired slave device in a network multicast mode through the wired switch at the time interval of the synchronous period t 1.
And the master device control module controls the wireless communication transceiving module to send the synchronization signal to the slave device with the wireless receiving end in the site at the time interval of the synchronization period t 2.
Wherein t1 and t2 can be set in advance according to different virtual reality systems to which the VR time synchronizer is applied.
The wired network port module of the slave device connected with the wire receives the synchronous command of network multicast and sends the synchronous command to the control module, and the control module calculates and obtains clock calibration information by utilizing the received synchronous signal and the pre-stored wired delay delta t1 between the master device and the slave device (namely, the delay from the time when the VR time synchronization master device transmits the synchronous signal to the time when the VR time synchronization slave device calibrates the system clock of the attached device).
the wireless communication transceiver module of the slave device connected wirelessly receives a synchronization command from the wireless communication receiving end and sends the synchronization command to the control module, and the control module calculates and acquires clock calibration information by using a synchronization signal received from the wireless communication receiving end and a pre-stored wireless delay delta t2 between the master device and the slave device (i.e. a delay from the moment when the VR time synchronization master device transmits the synchronization signal to the moment when the VR time synchronization slave device calibrates the system clock of the slave device).
according to the different mode that the slave equipment is attached to the virtual reality equipment, the clock calibration process is different. If the slave equipment is built in the virtual reality equipment, the slave equipment control module can directly calibrate the system clock of the virtual reality equipment according to the clock calibration information obtained by calculation, and the microsecond-level clock synchronization task between the master equipment and the slave equipment which are connected in a wired mode is completed. If the slave equipment is attached to the virtual reality equipment through the wired network port, the slave equipment control module calculates and acquires clock calibration information and then sends the clock calibration information to the virtual reality equipment through the communication module, and forcibly calibrates the clock of the virtual reality equipment to complete microsecond-level clock synchronization tasks between the master equipment and the slave equipment which are connected in a wired mode.
the pre-stored wired delay delta t1 between the master device and the slave device and the pre-stored wireless delay delta t2 between the master device and the slave device are obtained by means of multiple pre-measurement and averaging, and the measuring instruments include, but are not limited to, oscilloscopes and the like.
compared with the prior art, the utility model discloses a VR time synchronizer's beneficial effect is: the utility model discloses a VR time synchronizer is applicable to various virtual reality systems to can support wired and wireless two kinds of communication mode, lay more simple and convenient, the suitability is wider.
Drawings
Fig. 1 is a schematic block diagram of a VR time synchronizer of the present invention;
Fig. 2 is a schematic diagram of an exemplary usage scenario of the VR time synchronizer of the present invention;
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 and 2, the preferred embodiment of the present invention provides a VR time synchronizer, which is suitable for various virtual reality systems, and can support two communication modes, namely wired and wireless, and is simpler and more convenient to arrange and wider in applicability.
The specific implementation mode is illustrated by taking a virtual reality active light infrared optical positioning system as an example. The system comprises a server, a computing unit, an infrared camera and an active light positioning piece. In the active light infrared optical positioning system, infrared identification point flicker on an active light positioning piece, infrared camera exposure and IMU data acquisition in the positioning piece are controlled based on a unified clock, so that the system can operate correctly. Therefore, both the infrared camera and the active optical positioning element need to be time synchronized. In the system, the VR time synchronization main equipment is independent equipment, is in wired connection with the infrared camera through a switch, and is communicated with the positioning piece in a wireless communication mode. VR time synchronization slave device modules are integrated in all the infrared cameras and the active optical positioning modules.
Fig. 1 shows a schematic block diagram of a VR time synchronizer according to the present invention. The VR time synchronizer comprises a control module and a communication module. The control module is composed of a microcontroller chip and a power management chip, and realizes the functions of clock running, interrupt processing, time interval setting (namely synchronous signal emission period), synchronous signal maintenance, power management and the like. The communication module mainly comprises a wired network port module for wired synchronous communication and a wireless communication transceiver module (900MHz wireless radio frequency communication transceiver module or 2.4GHz wireless communication transceiver module) for wireless communication. The main functions of the communication module are communication, including: clock synchronization between a master device and a slave device in wired connection is realized by means of a network module; clock synchronization between a master device and a slave device which are in wireless connection in a large space scene is realized by means of a wireless communication module.
The system usage scenario is schematically shown in fig. 2. The main device supports wired and wireless transmission modes, and the communication module of the main device is provided with a wired network port module and a wireless communication transceiving module at the same time. The master device is connected with the switch in a wired mode and communicates with VR time synchronization slave devices built in the infrared camera through the switch, in order to simplify the structure of the camera, the slave devices built in the infrared camera only support wired communication, and a communication module of the slave devices only is provided with a wired network port module; the master device communicates with the VR time synchronization slave device arranged in the positioning part in a wireless communication mode, the slave device arranged in the positioning part only supports wireless communication, and a communication module of the master device only has a wireless communication transceiver module.
The whole system operation flow is as follows:
All the devices are started and initialization work is executed.
All slave devices enter a waiting stage, and the clock running task is not started to be executed until the first synchronous signal is received.
and the control module controls the main device to immediately execute clock running tasks.
And the master device control module controls the wired network port module to send the synchronous signal to the wired slave device in a network multicast mode through the wired switch at the time interval of the synchronous period t 1.
And the master device control module controls the wireless communication transceiving module to send the synchronization signal to the slave device with the wireless receiving end in the site at the time interval of the synchronization period t 2.
The communication module of the slave device built in the infrared camera receives a synchronization command of network multicast and then sends the synchronization command to the control module, and the control module performs calculation and clock calibration by using the received synchronization signal and the pre-measured and stored wired delay delta t1 between the master device and the slave device to complete a clock synchronization task.
And the communication module of the slave equipment with the built-in positioning piece receives a synchronization command of the wireless communication receiving end and then sends the synchronization command to the control module, and the control module performs calculation and clock calibration by using the received synchronization signal and the pre-measured and stored wireless delay delta t2 between the master equipment and the slave equipment to complete a clock synchronization task.
The wired delay delta t1 between the master device and the slave device and the wireless delay delta t2 between the master device and the slave device are obtained by means of multiple measurements in advance and averaging, and the measuring instruments include but are not limited to oscilloscopes and the like.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (5)
1. A VR time synchronizer includes
The control module is used for realizing logic control, namely controlling the clock synchronization of the system;
And the communication module is used for realizing communication among different VR time synchronizers in the virtual reality system, namely transmitting and receiving synchronous signals.
2. The VR time synchronizer of claim 1, wherein the VR time synchronizer has a master-slave split; in a virtual reality system, there is only one master device, and the others are slave devices, wherein,
The control module in the main equipment generates a synchronous signal and periodically controls the communication module to transmit the synchronous signal to the space at fixed intervals;
The slave device receives the synchronous signal transmitted by the master device through the internal communication module and uploads the synchronous signal to the control module, and the control module realizes clock calibration according to the synchronous signal, so that the clock synchronization of the whole system is ensured.
3. The VR time synchronizer of claim 1,
The VR time synchronization slave equipment is attached to equipment needing synchronization in a virtual reality system in a mode of including,
The method is built in all devices needing to realize clock synchronization in a virtual reality system as a module, or,
The device is directly used as an external device and is in wired connection with all devices needing to realize clock synchronization of the virtual reality system through network ports.
4. The VR time synchronizer of claim 3,
the synchronous signal comprises the system clock information of the master device, the slave device can analyze the system clock information of the master device through the internal control module after receiving the synchronous signal, and the system clock information of the slave device is calculated and obtained after adding communication delay amount, and the system clock of the slave device is calibrated according to the calculation result, wherein,
The communication delay amount represents a delay from a time when the VR time synchronization master device transmits the synchronization signal to a time when the VR time synchronization slave device calibrates the system clock of the attached device, and is measured in advance and stored in the VR time synchronizer.
5. The VR time synchronizer of claim 1,
The VR time synchronization master device can simultaneously support both wired and wireless communication modes, namely can simultaneously transmit synchronization signals to different VR time synchronization slave devices through both wired and wireless communication modes,
The VR time synchronization slave device can support wired or wireless communication modes according to different use scenes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920440739.2U CN209805837U (en) | 2019-04-03 | 2019-04-03 | VR time synchronizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920440739.2U CN209805837U (en) | 2019-04-03 | 2019-04-03 | VR time synchronizer |
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| CN209805837U true CN209805837U (en) | 2019-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4156623A4 (en) * | 2020-06-23 | 2023-09-06 | Huawei Technologies Co., Ltd. | Video transmission method, apparatus, and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4156623A4 (en) * | 2020-06-23 | 2023-09-06 | Huawei Technologies Co., Ltd. | Video transmission method, apparatus, and system |
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