CN112816183A - VR head-mounted display equipment movement characteristic detection device and method - Google Patents
VR head-mounted display equipment movement characteristic detection device and method Download PDFInfo
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- CN112816183A CN112816183A CN202110233252.9A CN202110233252A CN112816183A CN 112816183 A CN112816183 A CN 112816183A CN 202110233252 A CN202110233252 A CN 202110233252A CN 112816183 A CN112816183 A CN 112816183A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a VR head-mounted display device movement characteristic detection device and a VR head-mounted display device movement characteristic detection method. The method comprises the following steps: initializing parameters; generating a test signal; formal testing; and obtaining the detection results of the movement delay and the movement characteristic according to the test data. The invention can simultaneously test in three directions, thereby reducing the detection steps and shortening the detection time. The invention can be widely applied to the field of VR device detection.
Description
Technical Field
The invention relates to the field of VR device detection, in particular to a VR head-mounted display equipment movement characteristic detection device and method.
Background
At present, the development of a movement delay device is attracting attention for the movement characteristic detection of the VR head-mounted display device, but the detection of the movement characteristic includes items such as movement tracking error in addition to the movement delay, and general movement delay devices are actually responsible for the detection of other movement characteristics at the same time. At present, the difference of the mobile delay measuring device is mainly reflected in the acquisition mode of the external mobile signal. The prior art provides a mode of acquiring external displacement coordinates by means of laser tubes, gradient codes, grating scales and the like, and a mode of acquiring external displacement characteristics by detecting light intensity by means of a partial method based on the characteristic that light intensity of a light source changes along with distance change. However, the common problems of these methods are that only one item (delay or movement tracking error) displacement characteristic test can be performed in one experimental period, the next experimental period is required after initialization is performed for performing another item test, and the operation posture of the head-mounted device needs to be changed for re-operation when performing another two-direction displacement characteristic test, so that several times of resetting is required for completing a movement characteristic detection task, and the detection efficiency is low.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a VR head-mounted display device movement characteristic detecting apparatus and method, which can complete the test of a plurality of movement characteristic items in three directions in one test cycle, reduce the detection steps and shorten the detection time.
The first technical scheme adopted by the invention is as follows: the utility model provides a VR wears display device mobility characteristics detection device, wears display device, three-dimensional platform, sample platform, photoelectric sensor and control module including VR, the sample platform is installed at the three-dimensional bench, VR wears display device and installs at the sample bench, photoelectric sensor arranges VR head-mounted display device's exit pupil position in, the three-dimensional platform is connected with control module with photoelectric sensor respectively.
Further, the three-dimensional table comprises an x-axis linear slide rail, a y-axis linear slide rail and a z-axis linear slide rail, and the sample table is arranged on the z-axis linear slide rail.
Furthermore, a first motor is arranged in the x-axis linear slide rail, a second motor is arranged in the y-axis linear slide rail, a third motor is arranged in the z-axis linear slide rail, and the first motor, the second motor and the third motor are respectively connected with the control module.
And the first motor, the second motor and the third motor are respectively connected with the position detection module.
The second technical scheme adopted by the invention is as follows: a VR head-mounted display device movement characteristic detection method comprises the following steps:
presetting a three-dimensional table moving path and selecting 10 mark points at equal intervals according to the position coordinates of the three-dimensional table to obtain a preset path and mark points;
the three-dimensional stage is moved along the predetermined path at a speed of less than 0.05 m/s.
Recording VR head-mounted display equipment when the three-dimensional table mark point is reached, and calculating a corresponding first virtual position coordinate;
controlling a display picture of the VR head-mounted display equipment according to a preset rule and the position coordinates;
controlling the three-dimensional table to move the VR head-mounted display equipment at a constant speed of 0.5m/s according to a preset path, and acquiring the time when the three-dimensional table reaches each mark point, the actual position coordinate of the three-dimensional table, the second virtual position coordinate of the VR head-mounted display equipment and a signal returned by the photoelectric sensor;
constructing a relation graph of the returned position and the time of the three-dimensional table according to the time when the three-dimensional table reaches each mark point and the actual position coordinates;
constructing a relation graph of the return level and the time of the photoelectric sensor according to the time when the three-dimensional table reaches each mark point and the signal returned by the photoelectric sensor;
the relation graph of the three-dimensional platform returned position and time and the relation graph of the photoelectric sensor returned level and time obtain the time difference of each mark point, and the delay result is obtained through statistics;
and counting according to the second virtual position coordinate of the VR head-mounted display equipment to obtain a result of the mobile tracking error.
Further, the step of controlling a display frame of the VR head-mounted display device according to a preset rule and a position coordinate specifically includes:
and operating a VR head-mounted display device test program, controlling the VR head-mounted display device to display a white picture at the mark point at the position 1, converting the mark point reaching the position 2 into a black picture, converting the mark point reaching the position 3 into a white picture, and repeating the steps until the mark point at the position 10.
Further, the calculation formula of the delay result is as follows:
in the above formula, Ti represents the time that the image sensor has the ith level change inflection point, Ti' represents the time that the three-dimensional platform reaches the ith mark point, and i represents the mark point number.
Further, the three-dimensional table return position further comprises a timing calibration position interval and position correction.
Further, still include:
calculating the distance between each mark point and the adjacent mark point according to the second virtual position coordinate of the VR head-mounted display equipment from the three-dimensional table to each mark point;
and calculating the movement tracking error according to the distance between each mark point and the adjacent mark point.
The method has the beneficial effects that: by the detection device and the detection method, the movement characteristic test tasks in three axial directions can be completed without adjusting the posture of the VR head-mounted display equipment, and the detection time is shortened while the detection quality is improved by accurately restoring the working state of the VR and carrying out the test in the state.
Drawings
FIG. 1 is a schematic diagram of an apparatus for detecting movement characteristics of a VR head mounted display device in accordance with the present invention;
FIG. 2 is a flowchart illustrating steps of a method for detecting movement characteristics of a VR head mounted display device in accordance with the present invention;
fig. 3 is a diagram showing the relationship between the position data returned by the three-dimensional stage 3 and the level data returned by the photoelectric sensor 5 and the time according to the embodiment of the present invention.
Reference numerals: 1. a VR head mounted display device; 2. a sample stage; 3. a three-dimensional table; 4. a control module; 5. a light-sensitive sensor.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
Referring to fig. 1, the invention provides a movement characteristic detection device for a VR head-mounted display device, which comprises a VR head-mounted display device 1, a three-dimensional table 3, a sample table 2, a photoelectric sensor 5 and a control module 4, wherein the sample table 2 is mounted on the three-dimensional table 3, the VR head-mounted display device 1 is mounted on the sample table 2, the photoelectric sensor 5 is arranged at an exit pupil position of the VR head-mounted display device 1, and the three-dimensional table 3 and the photoelectric sensor 5 are respectively connected with the control module 4.
Further as a preferred embodiment, the three-dimensional stage 3 includes an x-axis linear slide rail, a y-axis linear slide rail and a z-axis linear slide rail, and the sample stage is disposed on the z-axis linear slide rail.
Specifically, the x-axis linear slide rail, the y-axis linear slide rail and the z-axis linear slide rail need to meet the technical requirements that the minimum moving distance is less than or equal to 1mm and the repeated positioning precision is less than or equal to 0.01 mm.
As a preferred embodiment, a first motor is arranged in the x-axis linear slide rail, a second motor is arranged in the y-axis linear slide rail, a third motor is arranged in the z-axis linear slide rail, and the first motor, the second motor and the third motor are respectively connected with the control module 4.
Further as a preferred embodiment, the system further comprises a position monitoring module, and the first motor, the second motor and the third motor are respectively connected with the position detection module.
Specifically, the control module controls the movement position of the motor, and meanwhile, the position monitoring module adopts a high-resolution linear encoder to provide accurate positioning feedback so as to form closed-loop movement control.
Referring to fig. 2, a detection method applied to the VR head-mounted display device movement characteristic detection method apparatus includes the following steps:
presetting a moving path of a three-dimensional table 3 and selecting 10 mark points at equal intervals according to position coordinates of the three-dimensional table 3 to obtain the preset path and the mark points;
the three-dimensional stage 3 is moved along a predetermined path at a speed of less than 0.05 m/s.
Recording a first virtual position coordinate calculated by VR head-mounted display equipment 1 when a mark point of a three-dimensional table 3 is reached;
controlling a display picture of the VR head-mounted display equipment 1 according to a preset rule and a position coordinate;
controlling the three-dimensional table to move the VR head-mounted display device 1 at a constant speed of 0.5m/s according to a preset path, and acquiring the time when the three-dimensional table 3 reaches each mark point, the actual position coordinate of the three-dimensional table, the second virtual position coordinate of the VR head-mounted display device 1 and a signal returned by the photoelectric sensor 5;
constructing a relation graph of the returned position and the time of the three-dimensional table 3 according to the time when the three-dimensional table 3 reaches each mark point and the actual position coordinates;
constructing a relation graph of the returned level and the time of the photoelectric sensor 5 according to the time when the three-dimensional table reaches each mark point and the signal returned by the photoelectric sensor 5;
specifically, the relationship between the position data returned by the three-dimensional stage 3 and the level data returned by the photoelectric sensor 5 and the time is compared with the time corresponding to the positions 1 to 10 in fig. 3, and the time differences t1 to t10 corresponding to the positions 1 to 10 can be obtained.
And obtaining the time difference of each mark point according to the relation graph of the returned position and the time of the three-dimensional table 3 and the relation graph of the returned level and the time of the photoelectric sensor 5, and counting to obtain a delay result.
Specifically, since the reference of comparison of the VR movement position coordinates is the three-dimensional stage 3, the movement precision and accuracy of the three-dimensional stage 3 are one of the keys that restrict the test precision. The minimum moving distance of the three-dimensional table 3 is less than or equal to 1mm, and the repeated positioning precision is less than or equal to 0.01 mm. A high-resolution linear encoder (a grating ruler) is adopted to provide accurate positioning feedback, and closed-loop movement control is formed.
And counting according to the second virtual position coordinate of the VR head-mounted display equipment to obtain a result of the mobile tracking error.
As a further preferred embodiment, the step of controlling the display screen of the VR head-mounted display device according to the preset rule and the position coordinate specifically includes:
and running a VR head-mounted display device 1 test program, controlling the VR head-mounted display device 1 to display a white picture at a mark point at the position 1, converting the mark point reaching the position 2 into a black picture, converting the mark point reaching the position 3 into a white picture, and repeating the steps until the mark point reaching the position 10.
Further as a preferred embodiment, the calculation formula of the delay result is as follows:
in the above formula, Ti represents the time that the image sensor has the ith level change inflection point, Ti' represents the time that the three-dimensional platform reaches the ith mark point, and i represents the mark point number.
Further as a preferred embodiment, the three-dimensional stage return position further includes timing to calibrate the position interval and performing position correction.
Further as a preferred embodiment, the method further comprises:
calculating the distance between each mark point and the adjacent mark point according to the second virtual position coordinate of the three-dimensional table 3 reaching each mark point VR head-mounted display device 1;
and calculating the movement tracking error according to the distance between each mark point and the adjacent mark point.
Further as a preferred embodiment, the calculation formula of the motion tracking error is as follows:
in the above equation, TTE represents a motion tracking error, dstepDenotes the step size, diIndicating the distance between each recording point and its adjacent recording point, and n indicates the total number of steps.
The invention can measure the movement characteristic parameters of the XYZ three axes without changing the posture, and can measure the delay and the movement tracking error in a test period.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a VR wears display device mobility characteristics detection device, its characterized in that wears display device, three-dimensional platform, sample platform, photoelectric sensor and control module including VR, the sample platform is installed at the three-dimensional bench, VR wears display device and installs at the sample platform, photoelectric sensor arranges VR head-wearing display device's exit pupil position in, the three-dimensional platform is connected with control module with photoelectric sensor respectively.
2. The VR head-mounted display device movement characteristic detection apparatus of claim 1, wherein the three-dimensional stage comprises an x-axis linear slide, a y-axis linear slide and a z-axis linear slide, and the sample stage is disposed on the z-axis linear slide.
3. The apparatus of claim 2, wherein a first motor is disposed in the x-axis linear slide, a second motor is disposed in the y-axis linear slide, a third motor is disposed in the z-axis linear slide, and the first motor, the second motor, and the third motor are respectively coupled to the control module.
4. The VR head-mounted display device movement characteristic detection apparatus of claim 3 further comprising a position monitoring module, wherein the first motor, the second motor and the third motor are respectively connected to the position monitoring module.
5. A VR head-mounted display device movement characteristic detection method is characterized by comprising the following steps:
presetting a three-dimensional table moving path and selecting 10 mark points at equal intervals according to the position coordinates of the three-dimensional table to obtain a preset path and mark points;
moving the three-dimensional table along a preset path at a speed of less than 0.05 m/s;
recording a first virtual position coordinate calculated by VR head-mounted display equipment when the three-dimensional table mark point is reached;
controlling a display picture of the VR head-mounted display equipment according to a preset rule and the position coordinates;
controlling the three-dimensional table to move the VR head-mounted display equipment at a constant speed of 0.5m/s according to a preset path, and acquiring the time when the three-dimensional table reaches each mark point, the actual position coordinate of the three-dimensional table, the second virtual position coordinate of the VR head-mounted display equipment and a signal returned by the photoelectric sensor;
constructing a relation graph of the returned position and the time of the three-dimensional table according to the time when the three-dimensional table reaches each mark point and the actual position coordinates;
constructing a relation graph of the return level and the time of the photoelectric sensor according to the time when the three-dimensional table reaches each mark point and the signal returned by the photoelectric sensor;
obtaining the time difference of each mark point according to the relation graph of the returned position and the moment of the three-dimensional platform and the relation graph of the returned level and the moment of the photoelectric sensor, and counting to obtain a delay result;
and counting according to the second virtual position coordinate of the VR head-mounted display equipment to obtain a result of the mobile tracking error.
6. The method of claim 5, wherein the step of controlling the display frame of the VR head-mounted display device according to the preset rule and the position coordinate specifically comprises:
and operating a VR head-mounted display device test program, controlling the VR head-mounted display device to display a white picture at the mark point at the position 1, converting the mark point reaching the position 2 into a black picture, converting the mark point reaching the position 3 into a white picture, and repeating the steps until the mark point at the position 10.
7. The VR head-mounted display device movement characteristic detection method of claim 6, wherein the delay result is calculated as follows:
in the above formula, Ti represents the time that the image sensor has the ith level change inflection point, Ti' represents the time that the three-dimensional platform reaches the ith mark point, and i represents the mark point number.
8. The VR head-mounted display device movement characteristic detection method of claim 7, wherein the three-dimensional stage return position further includes timing a calibration position interval and performing a position correction.
9. The VR head mounted display device movement characteristic detection method of claim 6, further comprising:
calculating the distance between each mark point and the adjacent mark point according to the second virtual position coordinate of the VR head-mounted display equipment from the three-dimensional table to each mark point;
and calculating the movement tracking error according to the distance between each mark point and the adjacent mark point.
10. The VR head-mounted display device movement characteristic detection method of claim 9, wherein the movement tracking error is calculated as follows:
in the above equation, TTE represents a motion tracking error, dstepDenotes the step size, diIndicating the distance between each recording point and its adjacent recording point, and n indicates the total number of steps.
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| CN114739642A (en) * | 2022-04-29 | 2022-07-12 | 苏州威达智电子科技有限公司 | Motion display delay testing device and system of virtual reality equipment |
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