CN105807602A - Method and system for testing virtual reality equipment delay - Google Patents
Method and system for testing virtual reality equipment delay Download PDFInfo
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- CN105807602A CN105807602A CN201610136582.5A CN201610136582A CN105807602A CN 105807602 A CN105807602 A CN 105807602A CN 201610136582 A CN201610136582 A CN 201610136582A CN 105807602 A CN105807602 A CN 105807602A
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/012—Head tracking input arrangements
Abstract
The invention discloses a method and system for testing virtual reality equipment delay. The method comprises the steps that a test button is connected to an input interface of a control chip of a head-wearing end; a light sensing unit is arranged to be used for identifying black and white variation of a screen; the test button is pressed, and after the control chip detects that the test button is pressed, first position information is sent to a control end; a first time point of pressing the test button is recorded; after the first position information is received by the control end, when the screen initial state is displayed as black, a frame of a white image is sent to the head-wearing end, and the screen is controlled to display white from black; a second time point of identifying completion of black and while conversion of the screen by the light sensing unit is recorded; delay of virtual reality equipment is obtained according to the first time point and the second time point. The invention provides a method for objectively measuring the delay, the problems that in the existing method of artificially estimating the delay, the subjectivity is too high, and the error is too large are solved, and objective and accurate delay can be provided.
Description
Technical field
The present invention relates to technical field of virtual reality, particularly to a kind of method and system testing virtual reality device time delay.
Background technology
The time delay of virtual reality device is one of key parameter affecting wearing comfort, if time delay is excessive, then can cause wearer's dizziness, and the more big wearer's spinning sensation of time delay is more strong.Test accurately it is thus desirable to the time delay of virtual reality device is compared, in order to designer discovers problems and solve them.But, test at present not the testing scheme of virtual reality device, existing be all based on theory analysis, it does not have objectively means of testing.
Fig. 1 is the flow chart of the method estimating virtual reality device time delay in prior art.As it is shown in figure 1, first, the motion of head needs to be converted to digital signal, within this takes around 1ms.Then these digital signals are sent to computer by USB line, and are processed these digital signals by computer, obtain the data that computer needs, it is necessary to spend about 2ms.Then, by special algorithm, such as Time-warp algorithm, process the image obtained according to previous data, complete real shown picture.By testing, obtain the time of this image procossing within 0.5ms.But to be on the safe side, allow accident, increase severely such as CPU workload or image is big especially etc., it is necessary to for the time of the reserved 3ms of algorithm.Being finally that picture shows process in the display, the time of this process cost is relevant with the refresh rate of display screen, for instance the refresh rate of a kind of virtual reality device is 75Hz, then the time of needs i.e. 1/75s, is about 13.3ms.The time that thus can extrapolate needs altogether is 19.3ms.From said process it can be seen that this method uses the time delay of the artificial numerical computations virtual reality device estimated, error is bigger, it is impossible to objectively respond the real time delay of virtual display device.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of method and system testing virtual reality device time delay.
According to one aspect of the present invention, the invention provides a kind of method testing virtual reality device time delay, described virtual reality device includes controlling end and wearing end, and described method includes:
Wearing an input interface of the control chip of end described in being connected to by test button, described control chip detects described test button by this input interface and is pressed or lifts；
Arranging photosensitive unit between the screen of end and human eye described wearing, described photosensitive unit is for identifying the black and white change of described screen；
Press described test button, by described input interface, described control chip detects that described test button is pressed after, send primary importance information to described control end；
Record the very first time point that described test button is pressed；
After described control termination receives described primary importance information, when described screen original state is shown as black, send a frame white image to described end of wearing, control described screen and become display white from display black；
Record described photosensitive unit recognize described screen complete black and white conversion the second time point；
According to the interval between point of the described very first time and the second time point, obtain the time delay of described virtual reality device.
Wherein, after obtaining the time delay of described virtual reality device, described method also includes:
Lift described test button, by described input interface, described control chip detects that described test button is lifted after, send second position information to described control end；
After described control termination receives described second position information, send a frame black image to described end of wearing, control described screen and become display black from display white, revert to original state.
Wherein, described method also includes:
Described control chip output interface is connected to oscillographic first input channel, and described output interface exports the first level signal to described oscillographic first input channel；
The outfan of described photosensitive unit is connected to described oscillographic second input channel, and described outfan exports second electrical level signal to described oscillographic second input channel；
The original levels of described output interface and described outfan is all low level；
Described output interface is become high level from low level after detecting that described test button is pressed by described input interface by described control chip；Described record the very first time point that described test button is pressed and specifically include: by described oscillograph, the moment that described first level signal is become high level from low level is recorded as very first time point；
Described photosensitive unit recognize described screen complete black and white conversion after, described outfan is become high level from low level；Described record described photosensitive unit recognize described screen complete black and white conversion the second time point specifically include: by described oscillograph, the moment that described second electrical level signal is become high level from low level is recorded as the second time point.
Wherein, described photosensitive unit includes NPN type phototriode, NPN type switch triode, the first resistance and the second resistance；
The base stage of the photosensitive triode of described NPN type is as the input of described photosensitive unit, for absorbing the light that described screen sends；Colelctor electrode connects described first resistance and is followed by running voltage；Emitter stage connects the base stage of described NPN type switch triode；
The colelctor electrode of described NPN type switch triode connects described second resistance and is followed by running voltage；Grounded emitter；
The link of the colelctor electrode of described second resistance and described NPN type switch triode, as the outfan of described photosensitive unit, is used for exporting described second electrical level signal.
Wherein, described control end is PC or handheld terminal, described in wear end for virtual implementing helmet or virtual reality glasses.
According to another aspect of the present invention, the invention provides a kind of system testing virtual reality device time delay, described virtual reality device includes controlling end and wearing end, and described system includes test button, photosensitive unit and timing unit；
Described test button is connected with an input interface of the described control chip wearing end, for sending the instruction that test starts；Described control chip detects described test button by this input interface and is pressed or lifts；
Described photosensitive unit is worn between the screen of end and human eye described in being arranged on, for identifying the black and white change of described screen；
When described test button is pressed, by described input interface, described control chip detects that described test button is pressed after, send primary importance information to described control end；
After described control termination receives described primary importance information, when described screen original state is shown as black, send a frame white image to described end of wearing, control described screen and become display white from display black；
Described timing unit, the very first time point being pressed for recording described test button recognizes described screen with described photosensitive unit and completes the second time point of black and white conversion；And according to the interval between point of the described very first time and the second time point, obtain the time delay of described virtual reality device.
Wherein, when described test button lifts, by described input interface, described control chip detects that described test button is lifted after, send second position information to described control end；
After described control termination receives described second position information, send a frame black image to described end of wearing, control described screen and become display black from display white, revert to original state.
Wherein, described timing unit includes oscillograph；
One output interface of described control chip is connected with described oscillographic first input channel, and described output interface exports the first level signal to described oscillographic first input channel；
The outfan of described photosensitive unit is connected with described oscillographic second input channel, and described outfan exports second electrical level signal to described oscillographic second input channel；
The original levels of described output interface and described outfan is all low level；
Described output interface is become high level from low level after detecting that described test button is pressed by described input interface by described control chip；By described oscillograph, the moment that described first level signal is become high level from low level is recorded as very first time point；
Described photosensitive unit recognize described screen complete black and white conversion after, described outfan is become high level from low level, by described oscillograph, the moment that described second electrical level signal is become high level from low level is recorded as the second time point.
Wherein, described photosensitive unit includes NPN type phototriode, NPN type switch triode, the first resistance and the second resistance；
The base stage of the photosensitive triode of described NPN type is as the input of described photosensitive unit, for absorbing the light that described screen sends；Colelctor electrode connects described first resistance and is followed by running voltage；Emitter stage connects the base stage of described NPN type switch triode；
The colelctor electrode of described NPN type switch triode connects described second resistance and is followed by running voltage；Grounded emitter；
The link of the colelctor electrode of described second resistance and described NPN type switch triode, as the outfan of described photosensitive unit, is used for exporting described second electrical level signal.
Wherein, described control end is PC or handheld terminal, described in wear end for virtual implementing helmet or virtual reality glasses.
The embodiment of the present invention provides the benefit that: a kind of method providing objective measurement virtual reality device time delay, solve existing by artificially estimate determine the problem that time delay subjectivity is excessively strong, error is too big, time delay objective, accurate can be provided, it is simple to designer pinpoints the problems and solves problem.It is connected to an input interface of the control chip wearing end by testing button by one, detection high-low voltage judges that the button of this input interface lifts or press down the motion of analog subscriber head, be equivalent to start in a flash timing at user's head movement, make test more accurate.Send pre-set analog position information come analog subscriber head movement to position, it is to avoid the actual head movement position inaccuracy that carries out, reduce test error；By arranging photosensitive unit between the screen of end and human eye wearing, and the image of corresponding analog position information is set to a frame black image or a frame white image, changed by the black and white of photosensitive unit recognition screen, owing to the change between screen black and white contrasts substantially, therefore it is easier to avoid detection error.The very first time point that the present invention is pressed by recording button further recognizes screen with photosensitive unit and completes the second time point of black and white conversion, then the time delay of virtual reality device is obtained according to the interval between the two time point, thus objective, obtain true time delay easily, it is ensured that testing precision.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method estimating virtual reality device time delay in prior art；
The flow chart of a kind of method testing virtual reality device time delay that Fig. 2 provides for the embodiment of the present invention；
The structural representation of a kind of system testing virtual reality device time delay that Fig. 3 provides for the embodiment of the present invention；
The circuit diagram of photosensitive unit in a kind of method and system testing virtual reality device time delay that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
The flow chart of a kind of method testing virtual reality device time delay that Fig. 2 provides for the embodiment of the present invention.Wherein, virtual reality device includes controlling end and wearing end, and the two is connected by wired or wireless mode and interacts, and controls end and is mainly used in the process of image, wears end and is mainly used in display image.User wears when wearing end motion, as there is the actions such as head rotation, wear the image of display on end screen and according to the positional information respective change of user, can start, from the action of user, the time delay that the interval demonstrating corresponding image to screen is exactly this virtual reality device.Controlling end can be PC or handheld terminal, and wearing end can be virtual implementing helmet or virtual reality glasses, and the two can pass through HDMI wire and USB line connects, and wherein HDMI wire is used for transmitting display data, and USB line is for control commands such as transmission of location information.
As in figure 2 it is shown, the method testing virtual reality device time delay that the embodiment of the present invention provides includes:
Step S210: test button is connected to an input interface of the control chip wearing end, control chip is pressed by this input interface detection test button or is lifted.MCU or CPU wearing end detects pressing and lifting of this test button by the input interface being connected with test button.Such as, when testing button and pressing, this input interface is set to high level, is that this input interface is set to low level when test button lifts, by detecting the low and high level of this input interface, MCU or CPU wearing end can learn that button is pressed or lifted.
Step S220: arrange photosensitive unit between the screen of end and human eye wearing, photosensitive unit changes for the black and white of recognition screen.For the simplicity tested, we make screen be only possible to and are in two states, and display black or display are white, and the change of black and white is the change of display one two field picture.
Step S230: press test button, control chip sends primary importance information to controlling end after detecting that test button is pressed by this input interface.This positional information simulates out, it is possible to be coordinate information, is used for simulating the action that virtual reality glasses is worn.In practical application, have various positional information according to the action of user, but in testing, only send a pre-set positional information and can reach test purpose alternately with controlling end, operate easier.
Step S240: record the very first time point that test button is pressed.Namely very first time point is the time point that analog subscriber head moves.
Step S250: after control termination receives primary importance information, when screen original state is shown as black, sends a frame white image to wearing end, controls screen and becomes showing white from display black.It is of course also possible to screen is set to initially show black, then it is transformed into white, herein only initially to show that black illustrates.Control end, such as PC or handheld terminal, by with the interface wearing end, such as USB interface, receive the primary importance information of step S240, it is judged that user's head moves, and this primary importance information specify the position moved to.
Step S260: record photosensitive unit recognize screen complete black and white conversion the second time point.When the position of setting user's head rotation is consistent with primary importance information, it is seen that be the image of a frame white, so when screen display white, it is simply that screen completes the image that the user's head movement shown and simulate is corresponding.
Step S270: according to the interval between very first time point and the second time point, obtain the time delay of described virtual reality device.
It it is the time delay of this virtual reality device starting to show corresponding image to screen from user's head movement, adopt traditional timing mode timing error when head movement starts too big, and it is infeasible, therefore an input interface of the control chip wearing end it is connected to by a button, judge that button lifts or press down the motion of analog subscriber head by detecting high-low voltage, be equivalent to start in a flash timing at user's head movement, make test more accurate.The image seen during user's head movement is continuous print, which which it is difficult to judge the corresponding position of end two field picture, and use account portion to turn to an exactly accurate position to be not easy to realize, therefore have employed one pre-set analog position information of transmission, coming the position that analog subscriber head movement arrives, and the image that this location screen correspondence shows is set to a frame white image, the change contrast between screen black and white is substantially, it is easier to detection, and decreases error.
In a preferred embodiment, after step S270, the method for the test virtual reality device that the embodiment of the present invention provides also includes:
Step S280: lift test button, control chip sends second position information to controlling end after detecting that test button is lifted by the input interface being connected with test button.Second position information is the positional information of analog subscriber head movement equally, a frame black image corresponding with second position information.
Step S290: after control termination receives second position information, sends a frame black image to wearing end, controls screen and becomes showing black from display white, reverts to original state, it is simple to test next time.
Be explained above the process once tested of realizing, during actual test can repeatedly retest, then average, as the time delay of this virtual reality device, test result is more accurate.
In another preferred embodiment, the method for the test virtual reality device that the embodiment of the present invention provides also includes:
Control chip output interface is connected to oscillographic first input channel, and defining this output interface is GPO1, and output interface GPO1 exports the first level signal to oscillographic first input channel.
The outfan of photosensitive unit is connected to oscillographic second input channel, and defining this outfan is GPO2, and outfan GPO2 exports second electrical level signal to oscillographic second input channel.
The original levels of output interface GPO1 and outfan GPO2 is all low level.Certainly can be configured as high level herein, be transformed into low level afterwards, principle is identical, repeats no more.
Output interface GPO1 is become high level from low level after detecting that test button is pressed by input interface by control chip；" step S240: record the very first time point that test button is pressed " specifically includes: by oscillograph, are recorded as the very first time point moment that the first level signal is become high level from low level.
Photosensitive unit recognize screen complete black and white conversion after, outfan GPO2 is become high level from low level；" step S240: record photosensitive unit recognize screen complete black and white conversion the second time point " specifically include: by oscillograph, the moment that second electrical level signal is become high level from low level is recorded as the second time point.
Oscillograph is a kind of purposes electronic measuring instrument very widely, it is possible to depict the change curve of the instantaneous value of measured signal on panel, it is possible to test various different electricity, such as voltage, electric current, frequency, phase contrast, modulation etc..The first level signal and the moment of second electrical level signal generation saltus step can be read, thus being accurately obtained the interval in two moment, as the time delay of this virtual reality device by oscillographic time scale.
The circuit diagram of photosensitive unit in a kind of method and system testing virtual reality device time delay that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, it is further preferred that photosensitive unit includes NPN type phototriode Q1, NPN type switch triode Q2, the first resistance R1 and the second resistance R2.The base stage of NPN type photosensitive triode Q1 is as the input of described photosensitive unit, for the light that absorbing screen sends；Colelctor electrode connects the first resistance R1 and is followed by running voltage；Emitter stage connects the base stage of NPN type switch triode Q2；The colelctor electrode of NPN type switch triode connects the second resistance R2 and is followed by running voltage；Grounded emitter GND；The link of the colelctor electrode of the second resistance R2 and NPN type switch triode Q2, as the outfan GPO2 of photosensitive unit, is used for exporting second electrical level signal.When screen becomes showing white from display black, light can be irradiated on NPN type phototriode Q1, makes Q1 turn on, so that Q2 is also switched on, the current potential of GPO2 is pulled low, and becomes electronegative potential from high potential.When screen recover display black time, Q1 do not receive light irradiate and by, make Q2 also by, the current potential of GPO2 becomes high potential.
The structural representation of a kind of system testing virtual reality device time delay that Fig. 3 provides for the embodiment of the present invention.As it is shown on figure 3, the system testing virtual reality device time delay that the embodiment of the present invention provides includes test button 313, photosensitive unit 314 and timing unit 315.
Test button 313 is connected with an input interface of the control chip 311 wearing end 310, for sending the instruction that test starts；Control chip 311 is pressed by this input interface detection test button 313 or is lifted.
Photosensitive unit 314 is arranged between screen 312 and human eye, and the black and white for recognition screen 312 changes.
When test button 313 is pressed, control chip 311 sends primary importance information to controlling end 320 after detecting that test button 313 is pressed by above-mentioned input interface.
After control end 320 receives primary importance information, when screen 312 original state is shown as black, to wearing end 310 transmission one frame white image, controls screen 310 and become showing white from display black.
Very first time point and photosensitive unit 314 that timing unit 315 record test button 313 is pressed recognize screen 312 and complete the second time point of black and white conversion；And according to the interval between very first time point and the second time point, obtain the time delay of virtual reality device.
Preferably, when testing button 313 and lifting, control chip 311 sends second position information to controlling end 320 after detecting that test button 313 is lifted by the input interface being connected with test button 311.
After control end 320 receives second position information, to wearing end 310 transmission one frame black images, control screen 312 and become showing black from display white, revert to original state, it is simple to retest.
It is further preferred that timing unit 315 includes oscillograph.One output interface of control chip 311 is connected with oscillographic first input channel, and this output interface exports the first level signal to oscillographic first input channel.The outfan of photosensitive unit 314 is connected with oscillographic second input channel, and this outfan exports second electrical level signal to oscillographic second input channel.
The original levels of the output interface of control chip 311 and the outfan of photosensitive unit 314 is all low level.
Output interface is become high level from low level after detecting that test button 311 is pressed by input interface by control chip 311；By oscillograph, the moment that the first level signal is become high level from low level is recorded as very first time point.
Photosensitive unit 314 recognize screen 312 complete black and white conversion after, outfan is become high level from low level, by oscillograph, the moment that second electrical level signal is become high level from low level is recorded as the second time point.
Wherein, photosensitive unit includes NPN type phototriode Q1, NPN type switch triode Q2, the first resistance R1 and the second resistance R2, still as shown in Figure 4, the base stage of NPN type photosensitive triode Q1 is as the input of described photosensitive unit, for the light that absorbing screen sends；Colelctor electrode connects the first resistance R1 and is followed by running voltage；Emitter stage connects the base stage of NPN type switch triode Q2；The colelctor electrode of NPN type switch triode connects the second resistance R2 and is followed by running voltage；Grounded emitter GND；The link of the colelctor electrode of the second resistance R2 and NPN type switch triode Q2, as the outfan GPO2 of photosensitive unit, is used for exporting second electrical level signal.
Wherein, controlling end is PC or handheld terminal, described in wear end for virtual implementing helmet or virtual reality glasses.
In sum, a kind of method and system testing virtual reality device time delay provided by the invention, compared with prior art, have the advantages that
1, a kind of method and system testing virtual reality device time delay provided by the invention, a kind of method providing objective measurement time delay, solve existing by artificially estimate determine the problem that time delay subjectivity is excessively strong, error is too big, time delay objective, accurate can be provided, it is easy to designer discover problems and solve them.
2, a kind of method and system testing virtual reality device time delay provided by the invention, it is connected to an input interface of the control chip wearing end by testing button by one, the high-low voltage detecting this input interface lifts to judge button or presses down the motion of analog subscriber head, be equivalent to start in a flash timing at user's head movement, make test more accurate.
3, a kind of method and system testing virtual reality device time delay provided by the invention, send pre-set analog position information come analog subscriber head movement to position, it is to avoid the actual head movement position inaccuracy that carries out, reduce test error；By arranging photosensitive unit between the screen of end and human eye wearing, and the image of corresponding analog position information is set to a frame black image or a frame white image, changed by the black and white of photosensitive unit recognition screen, become apparent from owing to the change between screen black and white contrasts, be therefore easier to avoid detection error.
4, a kind of method and system testing virtual reality device time delay provided by the invention, the very first time point being pressed by recording button recognizes screen with photosensitive unit and completes the second time point of black and white conversion, then the time delay of virtual reality device is obtained according to the interval between the two time point, thus objective, obtain true time delay easily, it is ensured that testing precision.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All make within the spirit and principles in the present invention any amendment, equivalent replacement, improvement etc., be all contained in protection scope of the present invention.
Claims (10)
1. the method testing virtual reality device time delay, described virtual reality device includes controlling end and wearing end, it is characterised in that described method includes:
Wearing an input interface of the control chip of end described in being connected to by test button, described control chip detects described test button by this input interface and is pressed or lifts；
Arranging photosensitive unit between the screen of end and human eye described wearing, described photosensitive unit is for identifying the black and white change of described screen；
Press described test button, by described input interface, described control chip detects that described test button is pressed after, send primary importance information to described control end；
Record the very first time point that described test button is pressed；
After described control termination receives described primary importance information, when described screen original state is shown as black, send a frame white image to described end of wearing, control described screen and become display white from display black；
Record described photosensitive unit recognize described screen complete black and white conversion the second time point；
According to the interval between point of the described very first time and the second time point, obtain the time delay of described virtual reality device.
2. the method testing virtual reality device time delay as claimed in claim 1, it is characterised in that after obtaining the time delay of described virtual reality device, described method also includes:
Lift described test button, by described input interface, described control chip detects that described test button is lifted after, send second position information to described control end；
After described control termination receives described second position information, send a frame black image to described end of wearing, control described screen and become display black from display white, revert to original state.
3. the method testing virtual reality device time delay as claimed in claim 1, it is characterised in that described method also includes:
Described control chip output interface is connected to oscillographic first input channel, and described output interface exports the first level signal to described oscillographic first input channel；
The outfan of described photosensitive unit is connected to described oscillographic second input channel, and described outfan exports second electrical level signal to described oscillographic second input channel；
The original levels of described output interface and described outfan is all low level；
Described output interface is become high level from low level after detecting that described test button is pressed by described input interface by described control chip；Described record the very first time point that described test button is pressed and specifically include: by described oscillograph, the moment that described first level signal is become high level from low level is recorded as very first time point；
Described photosensitive unit recognize described screen complete black and white conversion after, described outfan is become high level from low level；Described record described photosensitive unit recognize described screen complete black and white conversion the second time point specifically include: by described oscillograph, the moment that described second electrical level signal is become high level from low level is recorded as the second time point.
4. the method testing virtual reality device time delay as claimed in claim 3, it is characterised in that described photosensitive unit includes NPN type phototriode, NPN type switch triode, the first resistance and the second resistance；
The base stage of the photosensitive triode of described NPN type is as the input of described photosensitive unit, for absorbing the light that described screen sends；Colelctor electrode connects described first resistance and is followed by running voltage；Emitter stage connects the base stage of described NPN type switch triode；
The colelctor electrode of described NPN type switch triode connects described second resistance and is followed by running voltage；Grounded emitter；
The link of the colelctor electrode of described second resistance and described NPN type switch triode, as the outfan of described photosensitive unit, is used for exporting described second electrical level signal.
5. the method for the test virtual reality device time delay as described in any one of claim 1-4, it is characterised in that described control end is PC or handheld terminal, described in wear end for virtual implementing helmet or virtual reality glasses.
6. testing a system for virtual reality device time delay, described virtual reality device includes controlling end and wearing end, it is characterised in that described system includes test button, photosensitive unit and timing unit；
Described test button is connected with an input interface of the described control chip wearing end, for sending the instruction that test starts；Described control chip detects described test button by this input interface and is pressed or lifts；
Described photosensitive unit is worn between the screen of end and human eye described in being arranged on, for identifying the black and white change of described screen；
When described test button is pressed, by described input interface, described control chip detects that described test button is pressed after, send primary importance information to described control end；
After described control termination receives described primary importance information, when described screen original state is shown as black, send a frame white image to described end of wearing, control described screen and become display white from display black；
Described timing unit, the very first time point being pressed for recording described test button recognizes described screen with described photosensitive unit and completes the second time point of black and white conversion；And according to the interval between point of the described very first time and the second time point, obtain the time delay of described virtual reality device.
7. the system testing virtual reality device time delay as claimed in claim 6, it is characterised in that
When described test button lifts, by described input interface, described control chip detects that described test button is lifted after, send second position information to described control end；
After described control termination receives described second position information, send a frame black image to described end of wearing, control described screen and become display black from display white, revert to original state.
8. the system testing virtual reality device time delay as claimed in claim 5, it is characterised in that described timing unit includes oscillograph；
One output interface of described control chip is connected with described oscillographic first input channel, and described output interface exports the first level signal to described oscillographic first input channel；
The outfan of described photosensitive unit is connected with described oscillographic second input channel, and described outfan exports second electrical level signal to described oscillographic second input channel；
The original levels of described output interface and described outfan is all low level；
Described output interface is become high level from low level after detecting that described test button is pressed by described input interface by described control chip；By described oscillograph, the moment that described first level signal is become high level from low level is recorded as very first time point；
Described photosensitive unit recognize described screen complete black and white conversion after, described outfan is become high level from low level, by described oscillograph, the moment that described second electrical level signal is become high level from low level is recorded as the second time point.
9. the system testing virtual reality device time delay as claimed in claim 8, it is characterised in that described photosensitive unit includes NPN type phototriode, NPN type switch triode, the first resistance and the second resistance；
The base stage of the photosensitive triode of described NPN type is as the input of described photosensitive unit, for absorbing the light that described screen sends；Colelctor electrode connects described first resistance and is followed by running voltage；Emitter stage connects the base stage of described NPN type switch triode；
The colelctor electrode of described NPN type switch triode connects described second resistance and is followed by running voltage；Grounded emitter；
The link of the colelctor electrode of described second resistance and described NPN type switch triode, as the outfan of described photosensitive unit, is used for exporting described second electrical level signal.
10. the system of the test virtual reality device time delay as described in any one of claim 6-9, it is characterised in that described control end is PC or handheld terminal, described in wear end for virtual implementing helmet or virtual reality glasses.
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