CN112326199A - Visual axis error verification method and system for airborne optical equipment installation - Google Patents
Visual axis error verification method and system for airborne optical equipment installation Download PDFInfo
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- CN112326199A CN112326199A CN202011180376.7A CN202011180376A CN112326199A CN 112326199 A CN112326199 A CN 112326199A CN 202011180376 A CN202011180376 A CN 202011180376A CN 112326199 A CN112326199 A CN 112326199A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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Abstract
The invention relates to the technical field of avionic equipment, in particular to a visual axis error verification method and a verification system for mounting airborne optical equipment. The method supports the adoption of a visual observation method to carry out final error verification on the airborne optical equipment which is installed on the airplane, identifies the interchangeability problem which possibly occurs in the installation process, verifies the interchange precision guarantee of the airborne optical equipment, and improves the installation confidence of the airborne optical equipment.
Description
Technical Field
The invention relates to the technical field of avionic equipment, in particular to a visual axis error verification method and a verification system for mounting airborne optical equipment.
Background
When optical products for the purposes of head-up display, aiming measurement, and the like are mounted on an airplane, the optical products are generally not directly calibrated but are calibrated at the installation point of the structure. The installation technology is characterized in that the installation and calibration process is not influenced by inherent errors of a certain product, so that the interchangeability of product installation is ensured. I.e. another product of the same model with a different error is replaced without recalibration. Because the scheme has the characteristic that one-time calibration is used for the whole life, once the conditions of irregular operation, human errors, inaccurate measuring equipment and the like occur in the installation and calibration process, errors generated in the installation process can be coupled with inherent errors of the installed equipment, the problem of ultra-poor precision is covered, the interchangeability of products is lost, and hidden dangers are caused to the safe operation of the airplane. The current industry typically verifies the overall accuracy of only a single calibration for installation accuracy assurance, and subsequent interchangeability is demonstrated analytically.
Disclosure of Invention
In view of this, the invention provides a system and a method for verifying and correcting a boresight error of an airborne optical device installation, which support the final error verification of the airborne optical device installed on an airplane by adopting a visual observation method, identify the interchangeability problem possibly occurring in the installation process, verify the accuracy guarantee of the exchange of the airborne optical device, and improve the confidence coefficient of the airborne optical device installation.
In order to achieve the technical purpose, the invention adopts the following specific technical scheme:
a visual axis error verification method for mounting of airborne optical equipment comprises the following steps:
s101, mounting an airborne optical product into an optical precision measurement system to enable a middle shaft of the optical product to coincide with a middle shaft of the optical precision measurement system;
s102, measuring a visual axis of an airborne optical product through an optical precision measuring system, and comparing the deviation between the visual axis and the visual axis of the optical precision measuring system to obtain a visual axis error of the airborne optical product;
s103, adjusting the visual axis indicator symbol of the airborne optical product according to the deviation amount and the deviation direction of the visual axis error, and enabling the alignment direction of the visual axis indicator symbol to coincide with the middle axis of the precision measurement system to obtain a reference airborne optical product;
s104, mounting the reference airborne optical product on an airborne optical product mounting interface to obtain an optical system, and measuring the optical error of the optical system in a target calibration verification mode;
the optical error of the optical system is the structural deviation of the mounting interface of the airborne optical product;
s105: replacing the airborne optical product with the airborne optical product to be verified, and repeating the steps S101-S102 to obtain the visual axis error of the airborne optical product to be verified;
s106: setting the pitch angle of the visual axis error of the airborne optical product to be verifiedDegree error of deltaPHorizontal angle error of thetaPAnd calculating the visual axis error of the to-be-verified airborne optical product according to the following formula:
εP＝(δP 2+θP 2)1/2
s107, calculating and judging whether the final precision of the airborne optical product to be verified meets the precision requirement epsilon according to the following formulaR：
εR≥εP+εB
Wherein: epsilonBAnd mounting structural deviations of the interface for the airborne optical product.
Further, in step S103, the method for adjusting the visual axis indicator of the airborne optical product includes: the adjustment is performed by the onboard optical product itself or an external device.
Further, the present invention also provides a verification system based on the error verification method, including:
an airborne optical product;
the optical precision measurement system is used for measuring the visual axis error of the airborne optical product;
a boresight validation reference mark for establishing a relative ideal reference spatial position of the optical system;
and the display terminal is used for displaying the display picture of the airborne optical product.
Further, the optical system is a head-up display system, and the display terminal is the airborne optical product itself.
Further, the visual axis indicator symbol is used for indicating the visual axis of the airborne optical product and/or a specific range centered on the visual axis.
Further, the reference mark is generated by the onboard optical product.
Further, the optical precision measurement system supports visual interpretation or supports automatic recognition of the orientation and size of the visual axis indication of the deviation of the center position of the installed optical product from the optical precision measurement system.
Further, the boresight validation reference marks are used to indicate a visual axis of the on-board optical product that is expected to be targeted for use in the aircraft and/or to indicate a particular range centered on the visual axis of the on-board optical product that is targeted.
Further, the presentation form of the boresight verification reference mark and the presentation form of the reference mark reflecting the center position of the airborne optical product are mutually corresponding, and the correspondence relationship is as follows: when the presentation form of one reference mark at least comprises the visual axis indication, the other reference mark at least comprises the visual axis-centered specific range indication.
By adopting the technical scheme, the invention can bring the following beneficial effects:
the visual axis error verification system and method for mounting the airborne optical product, provided by the invention, can differentiate the error coupling of the mounting and target correcting process and the product, support visual observation verification method to identify the product interchangeability problem caused by potential mounting accuracy over-tolerance, improve the confidence coefficient of the mounting and target correcting process and eliminate the flight safety hidden trouble caused by the airborne optical product accuracy over-tolerance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of measuring the intrinsic optical error of a HUD (head-up display, the same applies below) using a collimator;
FIG. 2 is a schematic diagram of the observation of the optical errors inherent in the HUD measured using a collimator;
FIG. 3 is a schematic illustration of verifying a boresight installation error;
FIG. 4 is a flow chart for performing example HUD boresight validation.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
In one embodiment of the present invention, a method for verifying a boresight error of an onboard optical device installation is provided, comprising the following steps:
s101, mounting an airborne optical product into an optical precision measurement system to enable a middle shaft of the optical product to coincide with a middle shaft of the optical precision measurement system;
s102, measuring the visual axis of the airborne optical product through the optical precision measuring system, and comparing the deviation between the visual axis and the visual axis of the optical precision measuring system to obtain the visual axis error of the airborne optical product;
s103, adjusting the visual axis indicator symbol of the airborne optical product according to the deviation amount and the deviation direction of the visual axis error, and enabling the alignment direction of the visual axis indicator symbol to coincide with the middle axis of the precision measurement system to obtain a reference airborne optical product;
s104, mounting the reference airborne optical product on an airborne optical product mounting interface to obtain an optical system, and measuring the optical error of the optical system in a target calibration verification mode;
the optical error of the optical system is the structural deviation of the mounting interface of the airborne optical product;
s105: replacing the airborne optical product with the airborne optical product to be verified, and repeating the steps S101-S102 to obtain the visual axis error of the airborne optical product to be verified;
s106: setting the pitching angle error of the visual axis error of the airborne optical product to be verified as deltaPHorizontal angle error of thetaPAnd calculating the visual axis error of the airborne optical product to be verified according to the following formula:
εP＝(δP 2+θP 2)1/2
s107, calculating and judging whether the final precision of the airborne optical product to be verified meets the precision requirement epsilon according to the following formulaR：
εR≥εP+εB
Wherein: epsilonBAnd mounting structural deviation of the interface for the airborne optical product.
In one embodiment, in step S103, the method for adjusting the boresight indicator of the airborne optical product includes: the adjustment is made by the onboard optical product itself or by an external device.
In an embodiment, the present invention further provides a verification system based on the error verification method, including:
an airborne optical product;
the optical precision measurement system is used for measuring the visual axis error of the airborne optical product;
the boresight verification reference mark is used for establishing a relative ideal reference space position of the optical system;
and the display terminal is used for displaying a display picture of the airborne optical product.
In one embodiment, the optical system is a head-up display system and the display terminal is the onboard optical product itself.
In one embodiment, the boresight indicator symbol is used to indicate the boresight and/or a specific range centered on the boresight of the airborne optical product.
In one embodiment, the reference mark is self-generated by the on-board optical product.
In one embodiment, the optical precision measurement system supports visual interpretation or automatic identification of the orientation and size of the optical product mounted centered off the optical axis indicator of the optical precision measurement system.
In one embodiment, the boresight validation reference marks are used to indicate a visual axis of an onboard optical product that is expected to be targeted for use in the aircraft and/or to indicate a particular range centered on the visual axis of the onboard optical product that is being targeted.
In one embodiment, the presentation form of the boresight verification reference mark and the presentation form of the reference mark reflecting the center position of the airborne optical product are corresponding to each other, and the correspondence relationship is as follows: when the presentation form of one reference mark at least comprises the visual axis indication, the other reference mark at least comprises the visual axis-centered specific range indication.
In one embodiment, the embodiment of the present patent is described by taking an example of verifying a set of HUDs, and other general concepts in the summary of the invention are embodied as real objects in the description, so as to facilitate understanding of the embodiment. These specific details of the generic concept are not intended to be limiting.
A system for verifying boresight of an onboard HUD comprises a HUD10, a collimator 20 and a target board 100. HUD10 belongs to airborne optical products. Since the HUD10 itself also has a display characteristic, in the present embodiment, the HUD10 also belongs to the display terminal at the same time. Further, the collimator 20 belongs to an optical precision measuring system. The target board 100 belongs to the boresight validation reference mark. The embodiment also comprises an airplane used for forming a verification environment supporting verification of the mounting visual axis error of the HUD precision.
Wherein, HUD10 both can install measuring accuracy in collimator department, also can install the aircraft and be used for visual observation, and two department installation interfaces are unanimous. The HUD10 can externally input pictures required for boresight verification, such as a cross picture, a circle picture, and the like. The HUD can also display an externally input screen at any field of view position of the HUD according to the set parameters.
The collimator includes an image recognition system 30, which supports automatic measurement and recognition.
Wherein the target board 100 will display a cross reference mark 200. In the present embodiment, a cross reference mark 200 belongs to the visual axis indication.
As shown in fig. 4, performing HUD10 proof-of-target validation comprises the following steps:
step 1: the observation 40 of the magnitude and direction of the optical error inherent to HUD10 is measured using the collimator 20 as shown in fig. 2. A HUD10 capable of displaying the cross 50 in the center of the frame is mounted on the collimator and the alignment of the displayed cross 50 in the center of the HUD10 frame with the fiducial 60 on the collimator is observed. The image recognition system 30 is adopted to shoot at the eye position of the HUD and automatically recognize the pitch angle error delta of the set of HUD picture centerTAnd horizontal angle error thetaTThe error direction is expressed using the sign. Will make this errorThe parameters are recorded in the HUD 10.
Step 2: the HUD is caused to display a circular reference mark 300 in the centre of the frame by means of an external device actuation. In the present embodiment, the circular reference mark 300 belongs to an indication of a specific range centered on the visual axis. The radius of the circle is plotted as the maximum angle error epsilon allowed for the installation of the boresightB。
And step 3: using the pitch angle error and the horizontal angle error measured in step 1, reverse correction (-delta) is usedT, - θ) compensates for the circular position of the frame center of the HUD. The HUD displaying the circular reference mark represents a piece of benchmark HUD product. In this embodiment, the reference HUD product belongs to a reference airborne optical product.
And 4, step 4: in front of the aircraft, the target board 100 is placed in a position that can be viewed through the eye position where the HUD is mounted, with the center of the target board representing the visual axis at the pilot's eye position.
And 5: the reference HUD product 10 is installed in an aircraft cockpit.
Step 6: the reference HUD product 10 is caused to display the circular reference mark 300 in step 2. Observing the positional relationship of the circular reference mark 300 of the HUD and the cross reference mark 200 of the target plate at the design eye position of the reference HUD, and if the cross reference mark 200 of the target plate is located within the circular reference mark 300 of the HUD, continuing to perform step 7; if the cross is not located within the circle, the HUD boresight validation fails.
And 7: measuring the pitch angle error delta of a HUD product to be installed or replaced according to the step 1PAnd horizontal angle error thetaPCalculating the error epsilon of HUD productP：
εP＝(δP 2+θP 2)1/2
And 8: in the case of a pass through step 6, it is calculated and determined whether the final precision of the onboard optical product to be replaced meets the precision requirement epsilonR：
εR≥εP+εB。
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (9)
1. A visual axis error verification method for mounting an airborne optical device is characterized by comprising the following steps:
s101, mounting an airborne optical product into an optical precision measurement system to enable a middle shaft of the optical product to coincide with a middle shaft of the optical precision measurement system;
s102, measuring a visual axis of an airborne optical product through an optical precision measuring system, and comparing the deviation between the visual axis and the visual axis of the optical precision measuring system to obtain a visual axis error of the airborne optical product;
s103, adjusting the visual axis indicator symbol of the airborne optical product according to the deviation amount and the deviation direction of the visual axis error, and enabling the alignment direction of the visual axis indicator symbol to coincide with the middle axis of the precision measurement system to obtain a reference airborne optical product;
s104, mounting the reference airborne optical product on an airborne optical product mounting interface to obtain an optical system, and measuring the optical error of the optical system in a target calibration verification mode;
the optical error of the optical system is the structural deviation of the mounting interface of the airborne optical product;
s105: replacing the airborne optical product with the airborne optical product to be verified, and repeating the steps S101-S102 to obtain the visual axis error of the airborne optical product to be verified;
s106: setting the pitching angle error of the visual axis error of the airborne optical product to be verified as deltaPHorizontal angle error of thetaPAnd calculating the visual axis error of the to-be-verified airborne optical product according to the following formula:
εP＝(δP 2+θP 2)1/2
s107, calculating and judging whether the final precision of the airborne optical product to be verified meets the precision requirement epsilon according to the following formulaR：
εR≥εP+εB
Wherein: epsilonBAnd mounting structural deviations of the interface for the airborne optical product.
2. The verification method according to claim 1, wherein in step S103, the method for adjusting the boresight indicator of the airborne optical product is: the adjustment is performed by the onboard optical product itself or an external device.
3. A verification system of the error verification method according to claim 1, comprising:
an airborne optical product;
the optical precision measurement system is used for measuring the visual axis error of the airborne optical product;
a boresight validation reference mark for establishing a relative ideal reference spatial position of the optical system;
and the display terminal is used for displaying the display picture of the airborne optical product.
4. The authentication system of claim 3, wherein: the optical system is a head-up display system, and the display terminal is the airborne optical product.
5. The authentication system of claim 3, wherein: the visual axis indicator symbol is used for indicating the visual axis of the airborne optical product and/or a specific range taking the visual axis as the center.
6. The authentication system of claim 3, wherein: the reference mark is generated for the airborne optical product itself.
7. The authentication system of claim 3, wherein:
the optical precision measurement system supports visual interpretation or supports automatic recognition of the direction and size of the deviation of the center position of the mounted optical product from the visual axis indication of the optical precision measurement system.
8. The authentication system of claim 3, wherein:
the boresight validation reference marks are used to indicate a boresight of an onboard optical product that is expected to be targeted for use in the aircraft and/or to indicate a particular range centered on the boresight of the onboard optical product that is targeted.
9. The authentication system of claim 3, wherein:
the presentation form of the calibration target verification reference mark and the presentation form of the reference mark reflecting the center position of the airborne optical product are mutually corresponding, and the corresponding relation is as follows: when the presentation form of one reference mark at least comprises the visual axis indication, the other reference mark at least comprises the visual axis-centered specific range indication.
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