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CN-115499967-B - Method and system for self-adaptive floodlighting of aircraft cockpit

CN115499967BCN 115499967 BCN115499967 BCN 115499967BCN-115499967-B

Abstract

The invention discloses a method and a system for self-adaptive floodlight illumination of an aircraft cockpit, and relates to the technical field of cockpit illumination. The self-adaptive floodlighting of the aircraft cockpit is realized by collecting CIE 1931 absolute tristimulus values of ambient light in the cockpit, calculating CIE 1931 absolute tristimulus values to be compensated by the floodlighting light source, calculating control signal values of the floodlighting light source, and driving the floodlighting light source to be lightened by the calculated control signal values. The defect that the floodlighting of the existing aircraft cockpit needs manual dimming is overcome, the operating burden of a pilot is lightened, and the method has important effects of reducing the probability of pilot operating errors and improving the flight safety. The technical support can be provided for the development and production of the cockpit floodlight system and the upgrading and reconstruction of the cockpit lighting system of the active aircraft.

Inventors

  • ZHANG FUZHENG
  • GUAN XIANYU
  • SUN SHIQI
  • LV SHUYUAN

Assignees

  • 滨州学院

Dates

Publication Date
20260508
Application Date
20221008

Claims (8)

  1. 1. A method of adaptive flood lighting of an aircraft cockpit, comprising the steps of: Collecting CIE 1931 absolute tristimulus values of ambient light in a cockpit, calculating the current CIE 1931 absolute tristimulus values of a floodlight source, and calculating the CIE 1931 absolute tristimulus values of the ambient light in the cockpit after the floodlight is subtracted, wherein the floodlight source consists of red, green, blue and white four-color LED chips; calculating the CIE 1931 absolute tristimulus value to be compensated of the floodlight source according to the CIE 1931 absolute tristimulus value of the environmental light in the cockpit after the floodlight is subtracted; building a two-step optimization model based on CIE 1931 absolute tristimulus values to be compensated of the floodlight source, and calculating a control signal value of the floodlight source by adopting a non-negative least square algorithm and polynomial fitting; Driving the floodlight illumination source to light up by the calculated control signal value, so as to realize the self-adaptive floodlight illumination of the aircraft cockpit; the calculating CIE 1931 absolute tristimulus values of the ambient light of the cockpit after deducting the floodlight comprises: Color sensors disposed at the cockpit instrument panel, the left console, the right console, and the center console collect CIE 1931 absolute tristimulus values containing floodlighting ambient light in real time, noted as (X 0 ,Y 0 ,Z 0 ); Calculating the current CIE 1931 absolute tristimulus value of the floodlight source according to the current control signal values of the red, green, blue and white LED chips in the floodlight source of the cockpit, and recording the current CIE 1931 absolute tristimulus value as (X n ,Y n ,Z n ); Calculating CIE 1931 absolute tristimulus values of the ambient light in the cockpit after the floodlight is subtracted by using (X 0 ,Y 0 ,Z 0 ) and (X n ,Y n ,Z n ), and recording the CIE 1931 absolute tristimulus values as (X input ,Y input ,Z input ); The calculating of the control signal value of the floodlighting light specifically comprises: X output 、Y output 、Z output is expressed in a matrix form and is marked as T, T= [ X output ,Y output ,Z output ], and normalized brightness coefficients to be compensated of red, green, blue and white LED chips in the floodlight source are calculated and respectively marked as L R,u 、L G,u 、L B,u 、L W,u , wherein X output 、Y output 、Z output is an X value, a Y value and a Z value in CIE 1931 absolute tristimulus values to be compensated of the floodlight source; Normalizing Y values in a calibration sample set to obtain normalized brightness coefficient samples of red, green, blue and white LED chips, which are respectively recorded as L R,i 、L G,i 、L B,i 、L W,i , wherein the calibration sample set comprises control signal values of the red, green, blue and white LED chips and corresponding CIE 1931 absolute tristimulus values; Respectively establishing mapping functions from normalized brightness coefficients of the red, green, blue and white four-color LED chips to control signal values by using a calibration sample set and a normalized brightness coefficient sample through polynomial fitting, wherein the mapping functions are respectively recorded as f R (L)、f G (L)、f B (L)、f W (L), and the L is any effective normalized brightness coefficient of the red, green, blue and white four-color LED chips; Substituting L R,u 、L G,u 、L B,u 、L W,u into a mapping function f R (L)、f G (L)、f B (L)、f W (L) to calculate primary control signal values of red, green, blue and white LED chips in the floodlight illumination source, and respectively recording the primary control signal values as d R,0 、d G,0 、d B,0 、d W,0 ; Searching the control signal value closest to d R,0 、d G,0 、d B,0 、d W,0 from the calibration sample set, establishing a conversion matrix by utilizing CIE 1931 absolute tristimulus values corresponding to the closest control signal value in the calibration sample set, recording the established conversion matrix as M, calculating X, Y, Z, Y values to be compensated of red, green, blue and white four-color LED chips in the floodlight illumination light source through the conversion matrix M, and recording the X, Y, Z, Y values as X R,C 、Y G,C 、Z B,C 、Y W,C ; respectively establishing mapping functions from X, Y, Z, Y values of the red, green, blue and white LED chips to control signal values through polynomial fitting by utilizing a calibration sample set, and respectively recording the mapping functions as f R (X)、f G (Y)、f B (Z)、f W (Y); Substituting X R,C 、Y G,C 、Z B,C 、Y W,C into the mapping function f R (X)、f G (Y)、f B (Z)、f W (Y) to calculate the final control signal values of the red, green, blue and white LED chips.
  2. 2. The method for adaptive floodlighting of an aircraft cockpit according to claim 1, wherein the method for calculating the current CIE 1931 absolute tristimulus value of the floodlighting light according to the current control signal values of the red, green, blue and white LED chips in the floodlighting of the cockpit comprises the following steps: Establishing a calibration sample set containing control signal values of red, green, blue and white four-color LED chips and corresponding CIE 1931 absolute tristimulus values, wherein the ith control signal value in the calibration sample set is d i , and the CIE 1931 absolute tristimulus values of the corresponding red, green, blue and white four-color LED chips are respectively （X R,i ,Y R,i ,Z R,i ）、（X G,i ,Y G,i ,Z G,i ）、（X B,i ,Y B,i ,Z B,i ）、（X W,i ,Y W,i ,Z W,i ）; Respectively establishing mapping functions from control signal values of the red, green, blue and white LED chips to X, Y, Z, Y by using a calibration sample set through polynomial fitting, wherein the mapping functions are respectively recorded as f R (d)、f G (d)、f B (d)、f W (d), and d is any effective control signal value of the red, green, blue and white LED chips; Recording current control signal values of red, green, blue and white LED chips in a floodlighting light source of the cockpit as d R,n 、d G,n 、d B,n 、d W,n respectively, substituting the current control signal values into a mapping function f R (d)、f G (d)、f B (d)、f W (d) respectively to calculate X, Y, Z, Y values of the red, green, blue and white LED chips, and recording the calculated values as X R,n 、Y G,n 、Z B,n 、Y W,n respectively; And respectively searching the control signal values closest to d R,n 、d G,n 、d B,n 、d W,n from the calibration sample set, establishing a conversion matrix by utilizing CIE 1931 absolute tristimulus values corresponding to the closest control signal values in the calibration sample set, substituting X R,n 、Y G,n 、Z B,n 、Y W,n into the conversion matrix, and calculating the current CIE 1931 absolute tristimulus values (X n ,Y n ,Z n ) of the floodlighting source.
  3. 3. The method for adaptive flood lighting of an aircraft cockpit according to claim 1, wherein the CIE 1931 absolute tristimulus values to be compensated for by the flood lighting source are calculated, comprising the steps of: Calculating a Y value in the CIE 1931 absolute tristimulus values to be compensated of the floodlight source through dimming curve mapping by using the Y input value, and recording the Y value as Y output ; And calculating the X value and the Z value in the CIE 1931 absolute tristimulus values to be compensated of the floodlight source according to the Y output value, and respectively recording the X value and the Z value as X output 、Z output .
  4. 4. The method for adaptive floodlighting of an aircraft cockpit according to claim 1, wherein calculating the normalized luminance coefficients to be compensated for by the red, green, blue and white LED chips in the floodlighting source comprises substituting T into the formula And solving by using a non-negative least square algorithm, and calculating the normalized brightness coefficients to be compensated of the red, green, blue and white LED chips, wherein L opt is a matrix formed by the calculated L R,u 、L G,u 、L B,u 、L W,u , L is a matrix variable formed by the normalized brightness coefficients of the red, green, blue and white LED chips, and A is a matrix formed by CIE 1931 absolute tristimulus values of the red, green, blue and white LED chips at the maximum control signal value.
  5. 5. The method for adaptive floodlighting of an aircraft cockpit according to claim 1, wherein the calculation of the X, Y, Z, Y values to be compensated for by the red, green, blue and white LED chips in the floodlighting source comprises the steps of substituting M and T into the formula And solving by using a non-negative least square algorithm, and calculating X, Y, Z, Y values to be compensated of the red, green, blue and white LED chips, wherein S opt is a matrix formed by the calculated X R,C 、Y G,C 、Z B,C 、Y W,C , and S is a matrix variable formed by X, Y, Z, Y values to be compensated of the red, green, blue and white LED chips, corresponding to X R,C 、Y G,C 、Z B,C 、Y W,C .
  6. 6. A system for adaptive flood lighting of an aircraft cockpit, wherein a method for implementing the adaptive flood lighting of an aircraft cockpit according to any one of claims 1 to 5 comprises: the data acquisition module is configured to acquire CIE 1931 absolute tristimulus values of the environmental light in the cockpit, calculate the current CIE 1931 absolute tristimulus values of the floodlight source, and calculate CIE 1931 absolute tristimulus values of the environmental light in the cockpit after the floodlight is subtracted; The first data processing module is configured to calculate the CIE 1931 absolute tristimulus value to be compensated by the floodlight source according to the CIE 1931 absolute tristimulus value of the ambient light in the cockpit after the floodlight is subtracted; the second data processing module is configured to construct a two-step optimization model based on CIE 1931 absolute tristimulus values to be compensated for by the floodlight source, and calculate a control signal value of the floodlight source by adopting a non-negative least square algorithm and polynomial fitting; The third driving module is configured to drive the floodlight illumination light source to be lightened according to the calculated control signal value, so as to realize the self-adaptive floodlight illumination of the aircraft cockpit; the calculating CIE 1931 absolute tristimulus values of the ambient light of the cockpit after deducting the floodlight comprises: Color sensors disposed at the cockpit instrument panel, the left console, the right console, and the center console collect CIE 1931 absolute tristimulus values containing floodlighting ambient light in real time, noted as (X 0 ,Y 0 ,Z 0 ); Calculating the current CIE 1931 absolute tristimulus value of the floodlight source according to the current control signal values of the red, green, blue and white LED chips in the floodlight source of the cockpit, and recording the current CIE 1931 absolute tristimulus value as (X n ,Y n ,Z n ); The CIE 1931 absolute tristimulus values of the ambient light in the cockpit after subtraction of the flood illumination were calculated using (X 0 ,Y 0 ,Z 0 ) and (X n ,Y n ,Z n ) and recorded as (X input ,Y input ,Z input ).
  7. 7. A computer readable storage medium, having stored therein a plurality of instructions adapted to be loaded by a processor of a terminal device and to perform the method of adaptive flood lighting of an aircraft cockpit according to any one of claims 1-5.
  8. 8. A terminal device comprising a processor for implementing instructions and a computer-readable storage medium for storing instructions adapted to be loaded by the processor and to perform the method of adaptive flood lighting of an aircraft cockpit according to any one of claims 1 to 5.

Description

Method and system for self-adaptive floodlighting of aircraft cockpit Technical Field The invention relates to the technical field of cockpit illumination, in particular to a method and a system for adaptive floodlight illumination of an aircraft cockpit. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. The manipulation of the aircraft by the pilot is mainly dependent on the acquisition and processing of visual information, and the light environment in the cockpit directly influences the accurate acquisition of the visual information. The light environment in the cockpit is a complex visual environment formed by the combined action of outside light, inside illumination and various lighting devices in the cockpit. As an important component of cockpit lighting, flood lighting primarily provides sufficient lighting for the instrument panel, left and right consoles, and center consoles so that the pilot can quickly and accurately interpret the instrument and make the best maneuvers. The environmental light is changed instantly, so that the pilot can directly interfere with the interpretation of the instrument and the related indicating device, further the flight decision is affected, and the flight safety is threatened. Thus, cockpit flood lighting should be able to automatically vary with ambient light to ensure that the pilot always has the best visual ergonomics. However, the inventors have found that current cockpit flood lighting requires manual dimming by pilots to obtain optimal lighting conditions. Manual dimming not only distracts the pilot, but also increases the pilot's driving burden. More importantly, the probability of pilot control errors is increased, and serious threat is caused to flight safety. Therefore, how to realize the automatic adjustment of the floodlight illumination of the aircraft cockpit along with the change of the ambient light is a problem to be solved. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a method and a system for self-adaptive floodlighting of an aircraft cockpit, which can overcome the defect that the floodlighting of the aircraft cockpit needs manual dimming at present, and achieve the aims of reducing the pilot control error probability and improving the flight safety. In order to achieve the above object, the present invention is realized by the following technical scheme: in a first aspect, the present invention provides a method for adaptive flood lighting of an aircraft cockpit, as shown in fig. 1, comprising the steps of: Collecting CIE 1931 absolute tristimulus values of ambient light in a cockpit, calculating the current CIE 1931 absolute tristimulus values of a floodlight source, and calculating the CIE 1931 absolute tristimulus values of the ambient light in the cockpit after the floodlight is subtracted, wherein the floodlight source consists of red, green, blue and white four-color LED chips; calculating the CIE 1931 absolute tristimulus value to be compensated of the floodlight source according to the CIE 1931 absolute tristimulus value of the environmental light in the cockpit after the floodlight is subtracted; building a two-step optimization model based on CIE 1931 absolute tristimulus values to be compensated of the floodlight source, and calculating a control signal value of the floodlight source by adopting a non-negative least square algorithm and polynomial fitting; And driving the floodlight illumination source to light by the calculated control signal value, so as to realize the self-adaptive floodlight illumination of the aircraft cockpit. Further, the CIE 1931 absolute tristimulus value of the ambient light in the cockpit after the floodlight is subtracted is calculated, and the method specifically comprises the following steps of: collecting CIE 1931 absolute tristimulus values containing flood illumination ambient light in real time by color sensors arranged at a cockpit instrument panel, a left console, a right console and a center console, and recording as (X 0,Y0,Z0); Calculating the current CIE 1931 absolute tristimulus value of the floodlight source according to the current control signal values of the red, green, blue and white LED chips in the floodlight source of the cockpit, and recording the current CIE 1931 absolute tristimulus value as (X n,Yn,Zn); The CIE 1931 absolute tristimulus values of the ambient light in the cockpit after subtraction of the flood illumination were calculated using (X 0,Y0,Z0) and (X n,Yn,Zn) and recorded as (X input,Yinput,Zinput). Furthermore, according to the current control signal values of the red, green, blue and white LED chips in the floodlight illumination source of the cockpit, the current CIE 1931 absolute tristimulus value of the floodlight illumination source is calculated, and the method specifically comprises the following