阅读说明：本技术 一种直升机驾驶舱视看设备的亮度调控方法及装置 (Brightness regulating and controlling method and device for helicopter cockpit viewing equipment ) 是由 高元鹏 吴雨婷 于娟 黄博超 王立雄 何敏 于 2020-05-19 设计创作，主要内容包括：本发明公开了一种直升机驾驶舱视看设备的亮度调控方法及装置,获取机舱飞行员视野范围内的多个天空亮度值以及机舱飞行员与导光板之间的目视距,并确定天空亮度最大值,基于天空亮度最大值和目视距确定亮度调节参数,基于该参数对机舱内的显示器和导光板的亮度调节过程进行模拟,当调节结果均满足对应的调节结果时,基于亮度调节参数对显示器的亮度值和对比度进行调节以及对导光板的亮度值进行调节。本发明在确定亮度调节参数时,同时综合了预先设置的天空亮度等级和目标目视距等级,并通过亮度调节参数对机舱内的显示器和导光板的亮度调节过程进行模拟,保证了亮度调节参数可以达到飞行员的调光需求,从而实现了对导光板和显示器的精确调光。(The invention discloses a brightness control method and a brightness control device for a visual device of a helicopter cockpit, which are used for acquiring a plurality of sky brightness values in a visual field range of a cockpit pilot and a visual distance between the cockpit pilot and a light guide plate, determining a sky brightness maximum value, determining a brightness adjustment parameter based on the sky brightness maximum value and the visual distance, simulating a brightness adjustment process of a display and the light guide plate in the cockpit based on the brightness adjustment parameter, and adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjustment parameter when adjustment results all meet corresponding adjustment results. When the brightness adjusting parameters are determined, the preset sky brightness level and the target visual distance level are integrated, the brightness adjusting process of the display and the light guide plate in the cabin is simulated through the brightness adjusting parameters, the brightness adjusting parameters can meet the dimming requirement of a pilot, and therefore accurate dimming of the light guide plate and the display is achieved.)

1. A brightness control method for a visual device of a helicopter cockpit is characterized by comprising the following steps:

acquiring a plurality of sky brightness values in a visual field range of a cabin pilot and a visual distance between the cabin pilot and a light guide plate;

determining a sky brightness maximum from a plurality of the sky brightness values;

determining a sky brightness grade to which the sky brightness maximum value belongs to obtain a target sky brightness grade, and determining a visual range grade to which the visual range belongs to obtain a target visual range grade;

determining brightness adjusting parameters corresponding to the target sky brightness grade and the target visual range grade according to preset corresponding relations between sky brightness grade and visual range grade and the brightness adjusting parameters, wherein the brightness adjusting parameters comprise: a display brightness value, a display contrast value and a light guide plate brightness value;

simulating the brightness adjusting process of the display and the light guide plate in the cabin based on the brightness adjusting parameters to obtain a display brightness simulation adjusting result and a light guide plate brightness simulation adjusting result;

judging whether the display brightness simulation adjustment result meets a preset display brightness adjustment result or not, and judging whether the light guide plate brightness simulation adjustment result meets a preset light guide plate brightness adjustment result or not;

if yes, adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjusting parameter.

2. The method of claim 1, wherein the sky brightness level comprises: a no-glare rating, a tolerable glare rating and an intolerable glare rating, the relationship between the sky brightness value and each sky brightness level being as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m²Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m²Corresponding to an intolerant glare rating.

3. The luminance regulating method according to claim 1, wherein the eye distance scale comprises: the relationship between the apparent distance and the grade of the apparent distance for the long distance and the short distance is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

4. The brightness control method according to claim 1, further comprising:

when the display brightness simulation adjustment result does not meet the preset display brightness adjustment result, keeping the display contrast in the brightness adjustment parameter unchanged, and recalculating the display brightness value according to formula (1), wherein the formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, and returning to simulate the brightness adjusting process of the display again to obtain a display brightness simulation adjusting result.

5. The brightness control method according to claim 1, further comprising:

when the light guide plate brightness simulation adjustment result does not meet the preset light guide plate brightness adjustment result, recalculating the light guide plate brightness value according to a formula (2), wherein the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5 (2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And replacing the brightness value of the light guide plate in the brightness adjusting parameter with the recalculated brightness value of the light guide plate, and returning to simulate the brightness adjusting process of the light guide plate again to obtain a brightness simulation adjusting result of the light guide plate.

6. A brightness control device of a visual device of a helicopter cockpit is characterized by comprising:

the acquisition unit is used for acquiring a plurality of sky brightness values in a visual field range of the cabin pilot and a visual distance between the cabin pilot and the light guide plate;

a maximum value determining unit for determining a sky brightness maximum value from a plurality of the sky brightness values;

the grade determining unit is used for determining the sky brightness grade to which the sky brightness maximum value belongs to obtain a target sky brightness grade, and determining the visual range grade to which the visual range belongs to obtain a target visual range grade;

a parameter determining unit, configured to determine, according to a preset corresponding relationship between a sky brightness level and a visual range level and a brightness adjustment parameter, a brightness adjustment parameter corresponding to the target sky brightness level and the target visual range level, where the brightness adjustment parameter includes: a display brightness value, a display contrast value and a light guide plate brightness value;

the simulation unit is used for simulating the brightness adjusting process of the display and the light guide plate in the cabin based on the brightness adjusting parameters to obtain a display brightness simulation adjusting result and a light guide plate brightness simulation adjusting result;

the judging unit is used for judging whether the display brightness simulation adjusting result meets a preset display brightness adjusting result or not and whether the light guide plate brightness simulation adjusting result meets a preset light guide plate brightness adjusting result or not;

and the adjusting unit is used for adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjusting parameter under the condition that the judging unit judges that the brightness value and the contrast are the same.

7. The luminance regulating device of claim 6, wherein the sky luminance level comprises: a no-glare rating, a tolerable glare rating and an intolerable glare rating, the relationship between the sky brightness value and each sky brightness level being as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m²Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m²Corresponding to an intolerant glare rating.

8. The brightness control apparatus according to claim 7, wherein the eye distance scale comprises: the relationship between the apparent distance and the grade of the apparent distance for the long distance and the short distance is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

9. The luminance controlling apparatus as claimed in claim 6, further comprising:

a first calculating unit, configured to, when the display brightness simulation adjustment result does not satisfy the preset display brightness adjustment result, keep the display contrast in the brightness adjustment parameter unchanged, and recalculate a display brightness value according to formula (1), where formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And the first returning unit is used for replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the display again by the simulating unit to obtain a display brightness simulation adjusting result.

10. The luminance controlling apparatus as claimed in claim 6, further comprising:

a second calculating unit, configured to recalculate the brightness value of the light guide plate according to formula (2) when the brightness simulation adjustment result of the light guide plate does not satisfy the brightness adjustment result of the preset light guide plate, where the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5 (2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And the second returning unit is used for replacing the light guide plate brightness value in the brightness adjusting parameter with the recalculated light guide plate brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the light guide plate again by the simulating unit to obtain a light guide plate brightness simulation adjusting result.

Technical Field

The invention relates to the technical field of helicopters, in particular to a method and a device for regulating and controlling the brightness of a visual device of a helicopter cockpit.

Background

Helicopter cockpit is generally divided into two forms of parallel type (the primary and secondary drivers are in the same cabin) and longitudinal type (the primary driver is in the front cabin and the secondary driver is in the rear cabin). Although the arrangement positions of instrument boards, seats, operation platforms, operation pieces and the like of the two types of the cockpit are different, the cockpit has the characteristic of high integration arrangement. The delicate and complex equipment inside the cockpit carries a lot of important information, and therefore the information load from the view only inside the cockpit during driving is very heavy for the driver. Meanwhile, outdoor weather conditions are various, such as day, night, thunderstorm, cloud and fog, and the like, the light environment has a large variation range and is irregular, so that the accurate and timely visual judgment and operation of pilots are more challenged.

The development of the helicopter is in the transition stage from deep integration to intellectualization. The intelligentization mainly comprises three aspects, namely: the method has the capabilities of sensing and analyzing external information, has the technology of adapting to environmental changes through interaction with the environment, and forms a decision of responding to external stimuli and transmitting corresponding information.

The intelligent of current helicopter cockpit mainly reflects the intellectuality to cockpit light environment, through at the installation automatic dimming system of cockpit, carries out automatic dimming to light guide plate and display to the realization is to the automatically regulated of display and light guide plate luminance. The existing cockpit automatic dimming system classifies lighting conditions according to numerical intervals of working surface illuminance, each interval is used as a lighting condition, and corresponds to a lighting regulation and control strategy. However, in practice, weather conditions outside the cockpit are complex and various, and in a complex sky light environment, a numerical range of the illumination of one working surface may correspond to various complex illumination conditions. Therefore, existing regulation strategies can only coarsely dim the light guide plate and the display. Thus, when the existing automatic dimming scheme is adopted for dimming, if the dimming requirement of the pilot is not met, the pilot can only manually adjust the dimming.

Disclosure of Invention

In view of the above, the invention discloses a brightness control method and device for a helicopter cockpit viewing device, so as to realize that when a brightness adjustment parameter is determined, a preset sky brightness level and a target visual distance level are simultaneously integrated, and the brightness adjustment process of a display and a light guide plate in a cockpit is simulated based on the determined brightness adjustment parameter, so that the brightness adjustment parameter can meet the dimming requirement of a pilot, thereby realizing accurate dimming of the light guide plate and the display and solving the problems in the prior art.

A brightness control method for a helicopter cockpit viewing device comprises the following steps:

acquiring a plurality of sky brightness values in a visual field range of a cabin pilot and a visual distance between the cabin pilot and a light guide plate;

determining a sky brightness maximum from a plurality of the sky brightness values;

determining a sky brightness grade to which the sky brightness maximum value belongs to obtain a target sky brightness grade, and determining a visual range grade to which the visual range belongs to obtain a target visual range grade;

determining brightness adjusting parameters corresponding to the target sky brightness grade and the target visual range grade according to preset corresponding relations between sky brightness grade and visual range grade and the brightness adjusting parameters, wherein the brightness adjusting parameters comprise: a display brightness value, a display contrast value and a light guide plate brightness value;

simulating the brightness adjusting process of the display and the light guide plate in the cabin based on the brightness adjusting parameters to obtain a display brightness simulation adjusting result and a light guide plate brightness simulation adjusting result;

judging whether the display brightness simulation adjustment result meets a preset display brightness adjustment result or not, and judging whether the light guide plate brightness simulation adjustment result meets a preset light guide plate brightness adjustment result or not;

if yes, adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjusting parameter.

Optionally, the sky brightness level comprises: a no-glare rating, a tolerable glare rating and an intolerable glare rating, the relationship between the sky brightness value and each sky brightness level being as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m^2，Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m^2，Corresponding to an intolerant glare rating.

Optionally, the eye distance rating comprises: the relationship between the apparent distance and the grade of the apparent distance for the long distance and the short distance is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

Optionally, the method further includes:

when the display brightness simulation adjustment result does not meet the preset display brightness adjustment result, keeping the display contrast in the brightness adjustment parameter unchanged, and recalculating the display brightness value according to formula (1), wherein the formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, and returning to simulate the brightness adjusting process of the display again to obtain a display brightness simulation adjusting result.

Optionally, the method further includes:

when the light guide plate brightness simulation adjustment result does not meet the preset light guide plate brightness adjustment result, recalculating the light guide plate brightness value according to a formula (2), wherein the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5(2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And replacing the brightness value of the light guide plate in the brightness adjusting parameter with the recalculated brightness value of the light guide plate, and returning to simulate the brightness adjusting process of the light guide plate again to obtain a brightness simulation adjusting result of the light guide plate.

A brightness control device of a helicopter cockpit viewing device, comprising:

the acquisition unit is used for acquiring a plurality of sky brightness values in a visual field range of the cabin pilot and a visual distance between the cabin pilot and the light guide plate;

a maximum value determining unit for determining a sky brightness maximum value from a plurality of the sky brightness values;

the grade determining unit is used for determining the sky brightness grade to which the sky brightness maximum value belongs to obtain a target sky brightness grade, and determining the visual range grade to which the visual range belongs to obtain a target visual range grade;

a parameter determining unit, configured to determine, according to a preset corresponding relationship between a sky brightness level and a visual range level and a brightness adjustment parameter, a brightness adjustment parameter corresponding to the target sky brightness level and the target visual range level, where the brightness adjustment parameter includes: a display brightness value, a display contrast value and a light guide plate brightness value;

the simulation unit is used for simulating the brightness adjusting process of the display and the light guide plate in the cabin based on the brightness adjusting parameters to obtain a display brightness simulation adjusting result and a light guide plate brightness simulation adjusting result;

the judging unit is used for judging whether the display brightness simulation adjusting result meets a preset display brightness adjusting result or not and whether the light guide plate brightness simulation adjusting result meets a preset light guide plate brightness adjusting result or not;

and the adjusting unit is used for adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjusting parameter under the condition that the judging unit judges that the brightness value and the contrast are the same.

Optionally, the sky brightness level comprises: a no-glare rating, a tolerable glare rating and an intolerable glare rating, the relationship between the sky brightness value and each sky brightness level being as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m^2，Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m^2，Corresponding to an intolerant glare rating.

Optionally, the eye distance rating comprises: the relationship between the apparent distance and the grade of the apparent distance for the long distance and the short distance is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

Optionally, the method further includes:

a first calculating unit, configured to, when the display brightness simulation adjustment result does not satisfy the preset display brightness adjustment result, keep the display contrast in the brightness adjustment parameter unchanged, and recalculate a display brightness value according to formula (1), where formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And the first returning unit is used for replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the display again by the simulating unit to obtain a display brightness simulation adjusting result.

Optionally, the method further includes:

a second calculating unit, configured to recalculate the brightness value of the light guide plate according to formula (2) when the brightness simulation adjustment result of the light guide plate does not satisfy the brightness adjustment result of the preset light guide plate, where the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5(2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And the second returning unit is used for replacing the light guide plate brightness value in the brightness adjusting parameter with the recalculated light guide plate brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the light guide plate again by the simulating unit to obtain a light guide plate brightness simulation adjusting result.

From the technical scheme, the invention discloses a brightness control method and a device of a helicopter cockpit viewing device, which are used for acquiring a plurality of sky brightness values in the visual field range of a cockpit pilot and the visual distance between the cockpit pilot and a light guide plate, determining the maximum value of the sky brightness, determining the sky brightness level to which the maximum value of the sky brightness belongs to obtain a target sky brightness level, determining the visual distance level to which the visual distance belongs to obtain a target visual distance level, and setting the corresponding relation between the sky brightness level and the visual distance level and a brightness control parameter in advance, so that brightness control parameters corresponding to the target sky brightness level and the target visual distance level can be obtained, after the brightness control parameter is determined, the invention simulates the brightness control process of a display and the light guide plate in a cockpit based on the brightness control parameter to ensure the accuracy of the brightness control of the cockpit viewing device, and obtaining a display brightness simulation adjustment result and a light guide plate brightness simulation adjustment result, and determining that the obtained brightness adjustment parameter meets the requirement when the display brightness simulation adjustment result meets the preset display brightness adjustment result and the light guide plate brightness simulation adjustment result meets the preset light guide plate brightness adjustment result, so that the brightness value and the contrast of the display are adjusted and the brightness value of the light guide plate is adjusted based on the brightness adjustment parameter. According to the invention, when the brightness adjusting parameter is determined, the preset sky brightness level and the target visual distance level are simultaneously integrated, and the brightness adjusting process of the display and the light guide plate in the cabin is simulated based on the determined brightness adjusting parameter, so that the brightness adjusting parameter can meet the dimming requirement of a pilot, the accurate dimming of the light guide plate and the display is realized, and the problems in the prior art are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the disclosed drawings without creative efforts.

FIG. 1 is a flow chart of a method for regulating and controlling the brightness of a viewing device of a helicopter cockpit, according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a brightness control device of a helicopter cockpit viewing device disclosed in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention discloses a brightness control method and a device of a helicopter cockpit viewing device, which are used for acquiring a plurality of sky brightness values in the visual field range of a cockpit pilot and the visual distance between the cockpit pilot and a light guide plate, determining the maximum value of the sky brightness, determining the sky brightness level to which the maximum value of the sky brightness belongs to obtain a target sky brightness level, and determining the visual distance level to which the visual distance belongs to obtain a target visual distance level, wherein the brightness control parameters corresponding to the target sky brightness level and the target visual distance level can be obtained because the corresponding relation between the sky brightness level and the visual distance level and the brightness control parameters is preset in the invention, and after the brightness control parameters are determined, the invention simulates the brightness control process of a display and the light guide plate in the cockpit based on the brightness control parameters to ensure the accuracy of the brightness control of the cockpit viewing device, and obtaining a display brightness simulation adjustment result and a light guide plate brightness simulation adjustment result, and determining that the obtained brightness adjustment parameter meets the requirement when the display brightness simulation adjustment result meets the preset display brightness adjustment result and the light guide plate brightness simulation adjustment result meets the preset light guide plate brightness adjustment result, so that the brightness value and the contrast of the display are adjusted and the brightness value of the light guide plate is adjusted based on the brightness adjustment parameter. According to the invention, when the brightness adjusting parameter is determined, the preset sky brightness level and the target visual distance level are simultaneously integrated, and the brightness adjusting process of the display and the light guide plate in the cabin is simulated based on the determined brightness adjusting parameter, so that the brightness adjusting parameter can meet the dimming requirement of a pilot, the accurate dimming of the light guide plate and the display is realized, and the problems in the prior art are solved.

Referring to fig. 1, a flowchart of a brightness control method for a helicopter cockpit viewing device disclosed in an embodiment of the present invention includes the steps of:

s101, acquiring a plurality of sky brightness values in a visual field range of a cabin pilot and a visual distance between the cabin pilot and a light guide plate;

in practical applications, the sky brightness value is measured by a professional brightness-measuring camera in the helicopter, and the camera can obtain the sky brightness value in the visual field range by shooting images in the visual field range of the pilot of the cabin. The specific measurement process of the sky brightness value can be referred to the existing mature scheme, and is not described herein again.

The visual distance between the cabin pilot and the light guide plate refers to: the distance between the eyes of the cabin pilot and the center point within the pre-identified range of the light guide plate. In practical applications, the eye distance may be measured by a laser ranging sensor in the nacelle.

Step S102, determining a sky brightness maximum value from a plurality of sky brightness values;

it should be noted that, in the present embodiment, the maximum sky brightness value, that is, the maximum sky brightness value, of the plurality of sky brightness values is used as the sky brightness value finally determined in the field of view of the cabin pilot.

Step S103, determining a sky brightness grade to which the sky brightness maximum value belongs to obtain a target sky brightness grade, and determining a visual range grade to which the visual range belongs to obtain a target visual range grade;

wherein, can be based on sky brightness value and divide into three with sky brightness level, be respectively: a no glare rating, a tolerable glare rating, and an intolerable glare rating.

The relationship between the sky brightness value and each sky brightness level is as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m^2，Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m^2，Corresponding to an intolerant glare rating.

Therefore, the sky brightness level to which the sky brightness maximum value belongs can be determined by comparing the value of the sky brightness maximum value with the sky brightness value corresponding to each sky brightness level, and the target sky brightness level is obtained.

The visual distance grade between cabin pilot and the light guide plate includes two, is respectively: far distance and near distance.

The relationship between visual range and visual range rating is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

Therefore, the visual distance grade to which the visual distance belongs can be determined by comparing the acquired visual distance value with the visual distance value corresponding to each visual distance grade, and the target visual distance grade is obtained.

Step S104, determining brightness adjusting parameters corresponding to the target sky brightness grade and the target visual range grade according to preset corresponding relations between the sky brightness grade and the visual range grade and the brightness adjusting parameters;

wherein the brightness adjustment parameters include: a display brightness value, a display contrast value, and a lightguide brightness value.

Both the display and the light guide plate are viewing devices.

Specifically, the preset corresponding relationship between the sky brightness level and the visual range level and the brightness adjustment parameter is as follows:

no glare rating, at long distance: adjusting the brightness value of the display to 4.80cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 66.4cd/m²；

Glare free rating, at near distance: adjusting the brightness value of the display to 4.80cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 18.5cd/m²；

Tolerable glare rating, at long distance: adjusting the brightness value of the display to 5.59cd/m²(ii) a The display contrast is 1.09; the brightness value of the light guide plate is 66.4cd/m²；

Tolerable glare rating, at near distance: adjusting the brightness value of the display to 5.59cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 18.5cd/m²；

Intolerant glare rating, at distance: adjusting the brightness value of the display to 6.22cd/m²The display contrast is 1.10; the brightness value of the light guide plate is 66.4cd/m²；

Within the intolerant glare rating, at near distance: adjusting the brightness value of the display to 6.22cd/m²The display contrast is 1.10; the brightness value of the light guide plate is 22.9cd/m²。

S105, simulating the brightness adjusting process of the display and the light guide plate in the cabin based on the brightness adjusting parameters to obtain a display brightness simulation adjusting result and a light guide plate brightness simulation adjusting result;

it should be noted that, in order to ensure the brightness adjustment parameter determined based on the target sky brightness level and the target eye distance level, the brightness of the display and the light guide plate can be adjusted to a better brightness.

Step S106, judging whether the display brightness simulation adjustment result meets a preset display brightness adjustment result or not, and judging whether the light guide plate brightness simulation adjustment result meets a preset light guide plate brightness adjustment result or not, if so, executing step S107;

it should be noted that the preset display brightness adjustment result and the preset light guide plate brightness adjustment result are preset by the pilot according to the actual requirements, and the specific numerical values are determined according to the actual requirements, which is not limited herein.

And S107, adjusting the brightness value and the contrast of the display and adjusting the brightness value of the light guide plate based on the brightness adjusting parameter.

In summary, the invention discloses a brightness control method of a helicopter cockpit viewing device, which obtains a plurality of sky brightness values in the visual field range of a cockpit pilot and the visual distance between the cockpit pilot and a light guide plate, determines the maximum value of the sky brightness, determines the sky brightness level to which the maximum value of the sky brightness belongs to obtain a target sky brightness level, and determines the visual distance level to which the visual distance belongs to obtain a target visual distance level, because the invention presets the corresponding relation between the sky brightness level and the visual distance level and the brightness control parameter, the brightness control parameters corresponding to the target sky brightness level and the target visual distance level can be obtained, after the brightness control parameters are determined, the invention simulates the brightness control process of a display and the light guide plate in the cockpit based on the brightness control parameters to ensure the accuracy of the brightness control of the cockpit viewing device, and obtaining a display brightness simulation adjustment result and a light guide plate brightness simulation adjustment result, and determining that the obtained brightness adjustment parameter meets the requirement when the display brightness simulation adjustment result meets the preset display brightness adjustment result and the light guide plate brightness simulation adjustment result meets the preset light guide plate brightness adjustment result, so that the brightness value and the contrast of the display are adjusted and the brightness value of the light guide plate is adjusted based on the brightness adjustment parameter. According to the invention, when the brightness adjusting parameter is determined, the preset sky brightness level and the target visual distance level are simultaneously integrated, and the brightness adjusting process of the display and the light guide plate in the cabin is simulated based on the determined brightness adjusting parameter, so that the brightness adjusting parameter can meet the dimming requirement of a pilot, the accurate dimming of the light guide plate and the display is realized, and the problems in the prior art are solved.

To further optimize the above embodiment, after step S106, the method may further include:

when the display brightness simulation adjustment result does not meet the preset display brightness adjustment result, keeping the display contrast in the brightness adjustment parameter unchanged, and recalculating the display brightness value according to formula (1), wherein the formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, returning to execute the step S105, and obtaining the display brightness simulation adjusting result again.

To further optimize the above embodiment, after step S106, the method may further include:

when the light guide plate brightness simulation adjustment result does not meet the preset light guide plate brightness adjustment result, recalculating the light guide plate brightness value according to a formula (2), wherein the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5(2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And replacing the light guide plate brightness value in the brightness adjusting parameter with the recalculated light guide plate brightness value, returning to execute the step S105, and obtaining the light guide plate brightness simulation adjusting result again.

It should be noted that, after the display brightness value and the light guide plate brightness value are obtained through recalculation, the recalculated display brightness value needs to be compared with the preset display brightness adjustment result again, and comparing the recalculated light guide plate brightness value with the preset light guide plate brightness adjustment result again, when the recalculated brightness value of the display and the brightness value of the light guide plate both meet the corresponding preset adjustment result, the display luminance value in the luminance adjustment parameter is replaced by the recalculated display luminance value, and replacing the light guide plate brightness value in the brightness adjustment parameter with the recalculated light guide plate brightness value, and continuing to execute step S107, otherwise, and returning to the step S104, and repeating the steps until the recalculated brightness value of the display and the brightness value of the light guide plate both meet the corresponding preset adjustment result.

When the display brightness simulation adjustment result does not satisfy the preset display brightness adjustment result for the first time, the display brightness value may be calculated according to the formula (1), the display brightness value in the brightness adjustment parameter is replaced with the recalculated display brightness value, and the step S105 is executed to obtain the display brightness simulation adjustment result again. When the display brightness simulation adjustment result does not meet the preset display brightness adjustment result again, the display brightness simulation adjustment result can be manually fine-tuned by the cabin pilot.

Similarly, when the light guide plate brightness simulation adjustment result does not satisfy the preset light guide plate brightness adjustment result for the first time, the light guide plate brightness value may be recalculated according to the formula (2), the light guide plate brightness value in the brightness adjustment parameter is replaced by the recalculated light guide plate brightness value, and the step S105 is executed again to obtain the light guide plate brightness simulation adjustment result again. When the light guide plate brightness simulation adjustment result does not meet the preset light guide plate brightness adjustment result again, the light guide plate brightness simulation adjustment result can be manually fine-tuned by a cabin pilot.

Corresponding to the embodiment of the method, the invention also discloses a brightness control device of the visual equipment of the helicopter cockpit.

Referring to fig. 2, a schematic structural diagram of a brightness control device of a helicopter cockpit viewing device disclosed in an embodiment of the present invention includes:

the acquiring unit 201 is configured to acquire a plurality of sky brightness values in a field of view of the cabin pilot and a visual distance between the cabin pilot and the light guide plate;

the visual distance between the cabin pilot and the light guide plate refers to: the distance between the eyes of the cabin pilot and the center point within the pre-identified range of the light guide plate. In practical applications, the eye distance may be measured by a laser ranging sensor in the nacelle.

A maximum value determining unit 202, configured to determine a sky brightness maximum value from a plurality of sky brightness values;

it should be noted that, in the present embodiment, the maximum sky brightness value, that is, the maximum sky brightness value, of the plurality of sky brightness values is used as the sky brightness value finally determined in the field of view of the cabin pilot.

A level determining unit 203, configured to determine a sky brightness level to which the sky brightness maximum belongs, to obtain a target sky brightness level, and determine a visual range level to which the visual range belongs, to obtain a target visual range level;

wherein, can be based on sky brightness value and divide into three with sky brightness level, be respectively: a no glare rating, a tolerable glare rating, and an intolerable glare rating.

The relationship between the sky brightness value and each sky brightness level is as follows:

sky brightness value of 0cd/m²Corresponding to the glare-free grade;

0cd/m²brightness value of sky less than or equal to 3 x 10⁵cd/m^2，Corresponding to a tolerable glare rating;

sky brightness value > 3 x 10⁵cd/m^2，Corresponding to an intolerant glare rating.

Therefore, the sky brightness level to which the sky brightness maximum value belongs can be determined by comparing the value of the sky brightness maximum value with the sky brightness value corresponding to each sky brightness level, and the target sky brightness level is obtained.

The visual distance grade between cabin pilot and the light guide plate includes two, is respectively: far distance and near distance.

The relationship between visual range and visual range rating is as follows:

the visual range is not less than 55cm and is correspondingly long-distance;

the visual distance is more than or equal to 0cm and less than 55cm, corresponding to the short distance.

Therefore, the visual distance grade to which the visual distance belongs can be determined by comparing the acquired visual distance value with the visual distance value corresponding to each visual distance grade, and the target visual distance grade is obtained.

A parameter determining unit 204, configured to determine, according to a preset corresponding relationship between a sky brightness level and a visual range level and a brightness adjusting parameter, a brightness adjusting parameter corresponding to the target sky brightness level and the target visual range level, where the brightness adjusting parameter includes: a display brightness value, a display contrast value and a light guide plate brightness value;

both the display and the light guide plate are viewing devices.

Specifically, the preset corresponding relationship between the sky brightness level and the visual range level and the brightness adjustment parameter is as follows:

no glare rating, at long distance: adjusting the brightness value of the display to 4.80cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 66.4cd/m²；

Glare free rating, at near distance: adjusting the brightness value of the display to 4.80cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 18.5cd/m²；

Tolerable glare rating, at long distance: adjusting the brightness value of the display to 5.59cd/m²(ii) a The display contrast is 1.09; the brightness value of the light guide plate is 66.4cd/m²；

Tolerable glare rating, at near distance: adjusting the brightness value of the display to 5.59cd/m²The display contrast is 1.09; the brightness value of the light guide plate is 18.5cd/m²；

Intolerant glare rating, at distance: adjusting the brightness value of the display to 6.22cd/m²The display contrast is 1.10; the brightness value of the light guide plate is 66.4cd/m²；

Within the intolerant glare rating, at near distance: adjusting the brightness value of the display to 6.22cd/m²The display contrast is 1.10; the brightness value of the light guide plate is 22.9cd/m²。

A simulation unit 205, configured to simulate, based on the brightness adjustment parameter, a brightness adjustment process of the display and the light guide plate in the cabin, so as to obtain a display brightness simulation adjustment result and a light guide plate brightness simulation adjustment result;

it should be noted that, in order to ensure the brightness adjustment parameter determined based on the target sky brightness level and the target eye distance level, the brightness of the display and the light guide plate can be adjusted to a better brightness.

A determining unit 206, configured to determine whether the display brightness simulation adjustment result meets a preset display brightness adjustment result, and at the same time, whether the light guide plate brightness simulation adjustment result meets a preset light guide plate brightness adjustment result;

it should be noted that the preset display brightness adjustment result and the preset light guide plate brightness adjustment result are preset by the pilot according to the actual requirements, and the specific numerical values are determined according to the actual requirements, which is not limited herein.

An adjusting unit 207, configured to adjust the brightness value and the contrast of the display and adjust the brightness value of the light guide plate based on the brightness adjusting parameter if the determining unit 206 determines that the brightness is positive.

In summary, the invention discloses a brightness control device of a helicopter cockpit viewing device, which acquires a plurality of sky brightness values in the visual field range of a cockpit pilot and the visual distance between the cockpit pilot and a light guide plate, determines the maximum sky brightness value, determines the sky brightness level to which the maximum sky brightness value belongs to obtain a target sky brightness level, and determines the visual distance level to which the visual distance belongs to obtain a target visual distance level, because the invention presets the corresponding relation between the sky brightness level and the visual distance level and the brightness control parameter, the brightness control parameter corresponding to the target sky brightness level and the target visual distance level can be obtained, after the brightness control parameter is determined, the invention simulates the brightness control process of a display and the light guide plate in the cockpit based on the brightness control parameter to ensure the accuracy of the brightness control of the cockpit viewing device, and obtaining a display brightness simulation adjustment result and a light guide plate brightness simulation adjustment result, and determining that the obtained brightness adjustment parameter meets the requirement when the display brightness simulation adjustment result meets the preset display brightness adjustment result and the light guide plate brightness simulation adjustment result meets the preset light guide plate brightness adjustment result, so that the brightness value and the contrast of the display are adjusted and the brightness value of the light guide plate is adjusted based on the brightness adjustment parameter. According to the invention, when the brightness adjusting parameter is determined, the preset sky brightness level and the target visual distance level are simultaneously integrated, and the brightness adjusting process of the display and the light guide plate in the cabin is simulated based on the determined brightness adjusting parameter, so that the brightness adjusting parameter can meet the dimming requirement of a pilot, the accurate dimming of the light guide plate and the display is realized, and the problems in the prior art are solved.

To further optimize the above embodiment, the brightness control device may further include:

a first calculating unit, configured to, when the display brightness simulation adjustment result does not satisfy the preset display brightness adjustment result, keep the display contrast in the brightness adjustment parameter unchanged, and recalculate a display brightness value according to formula (1), where formula (1) is as follows:

y＝4.7936e^0.0519x(1)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And y is the display brightness value, and the unit is: cd/m²；

And the first returning unit is used for replacing the display brightness value in the brightness adjusting parameter with the recalculated display brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the display again by the simulating unit to obtain a display brightness simulation adjusting result.

To further optimize the above embodiment, the brightness control device may further include:

a second calculating unit, configured to recalculate the brightness value of the light guide plate according to formula (2) when the brightness simulation adjustment result of the light guide plate does not satisfy the brightness adjustment result of the preset light guide plate, where the formula (2) is as follows:

Y＝-0.01x²+0.93x+18.5(2)；

where x is the sky brightness maximum in units of: 10⁵cd/m²And Y is the brightness value of the light guide plate, and the unit is as follows: cd/m²；

And the second returning unit is used for replacing the light guide plate brightness value in the brightness adjusting parameter with the recalculated light guide plate brightness value, returning to the simulating unit, and simulating the brightness adjusting process of the light guide plate again by the simulating unit to obtain a light guide plate brightness simulation adjusting result.

It should be noted that, after the display brightness value and the light guide plate brightness value are obtained through recalculation, the recalculated display brightness value needs to be compared with the preset display brightness adjustment result again, and comparing the recalculated light guide plate brightness value with the preset light guide plate brightness adjustment result again, when the recalculated brightness value of the display and the brightness value of the light guide plate both meet the corresponding preset adjustment result, the display luminance value in the luminance adjustment parameter is replaced by the recalculated display luminance value, and replacing the light guide plate brightness value in the brightness adjustment parameter with the recalculated light guide plate brightness value, and continuing to execute the adjustment unit 207, otherwise, the process returns to the execution parameter determination unit 204, and repeats the above steps until the recalculated brightness value of the display and the brightness value of the light guide plate both satisfy the corresponding preset adjustment result.

It should be noted that, for the working principle of each component in the device embodiment, please refer to the corresponding part of the method embodiment, which is not described herein again.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.