CN111089708A - System and method for measuring error of head-up display center - Google Patents
System and method for measuring error of head-up display center Download PDFInfo
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- CN111089708A CN111089708A CN201911248713.9A CN201911248713A CN111089708A CN 111089708 A CN111089708 A CN 111089708A CN 201911248713 A CN201911248713 A CN 201911248713A CN 111089708 A CN111089708 A CN 111089708A
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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
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
- G01M11/0264—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested by using targets or reference patterns
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Abstract
The invention relates to a system and a method for measuring the error of a head-up display center, wherein a small collimator is fixed on a collimator switching bracket, a collimator and a mechanical interface installed on the switching bracket are reserved on the head-up display, a head-up display precision test picture is controlled, the head-up display precision test picture can be seen to be overlapped with a collimator grid mark through a head-up display combined mirror, and the error of the head-up display center can be obtained by judging the deviation of the head-up display test picture center and the collimator reference position through a visual or hand-held telescope.
Description
Technical Field
The invention belongs to the technical field of head-up displays, and relates to a system and a method for measuring head-up display center errors.
Background
A Head Up Display (HUD) is called a Head Up Display for short, and is a flight assist instrument commonly used in an aircraft at present. By "heads-up" is meant that the pilot is able to see the important information he needs without lowering his head. Head-up displays were first presented on military aircraft, reducing the frequency with which pilots need to look down at the instruments, avoiding interruptions in attention to the road ahead and loss of Awareness of the state (status Awareness). Because of the convenience of the HUD and the capability of improving flight safety, civil aircrafts are also installed in succession, and are now gradually applied to the field of automobiles.
Being the main display of the cockpit of a fighter aircraft, the accuracy of its display, particularly the accuracy of the position of the center, directly affects the pilot's interpretation of the displayed information and the external environment. Under the complex combat condition, the accuracy deviation of the head-up display center position directly influences the hit rate and the killing effect on the target; under the use environment of the shipboard aircraft, the level and high degree of the center position precision are displayed to play a key role in indicating whether the ship is successfully or not.
At present, the test and the adjustment of the position accuracy of the head-up display center are carried out on a special optical machine calibration table in a production place or a repair shop, the head-up display on the machine needs to be disassembled and then is transported to the place for test and adjustment, the time consumption is long, and the efficiency is low; the special optical-mechanical calibration platform has complex function, large volume and inconvenient transportation, so that the measurement work of the central error can not be carried out in a hangar or an airport, and the normal use of the head up display is seriously influenced. Therefore, there is a need for a device and method for rapidly measuring errors in the center of a head-up display, which is portable, easy to operate, and convenient to use under complex conditions such as airport hangars.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a system and a method for measuring errors of a head-up display center, which improve the efficiency of measuring the errors of the head-up display center, expand the use scenes and simplify the operation steps.
Technical scheme
A system for measuring the center error of a head-up display is characterized by comprising a collimator 1, a switching bracket 2 and a head-up display reserved mechanical interface 3; a reserved mechanical interface 3 is arranged on a measured product head-up display 4, a switching bracket 2 is arranged on the mechanical interface 3, a collimator 1 is positioned on the switching bracket 2, and the optical axis is parallel to the optical axis of a head-up display combined mirror 5; the field of view of the collimator 1 is not less than 3 degrees, the length is not more than 300mm, the parallax is not more than 1 minute, the aperture is 30mm, and 10-minute-spaced grid lines are arranged; the mechanical interface 3 is positioned to enable the optical axis of the collimator 1 to be parallel to the optical axis of the combined flat display mirror 5.
And the deviation of the included angle between the mounting surface of the head-up display reserved mechanical interface and the head-up display light axis is not more than 1 minute.
The deviation between the optical axis of the collimator 1 and the optical axis of the combined head up display mirror 5 is not more than 1 minute.
A method for measuring the center error of the head up display by adopting the system for measuring the center error of the head up display is characterized by comprising the following steps:
step 1: the mounting positions of the collimator and the adapter bracket are calibrated to meet the measurement requirement, after the adapter bracket is connected with the collimator and the head displayer, the collimator and the optical axis of the head displayer are parallel, and the deviation is not more than 1 minute;
step 2: installing the switching bracket fixed with the small collimator on the head-up display reserved mechanical interface, and completely attaching the mounting surface of the switching bracket to the mounting surface of the head-up display reserved mechanical interface;
and step 3: opening the collimator, and displaying 10-time-interval grid line pictures;
and 4, step 4: and observing a superposed picture of the head display precision test picture and the grid line picture of the collimator through the head display combination mirror, wherein the deviation error of the central identification point of the head display precision test picture and the center of the collimator is the head display central error.
Advantageous effects
The invention provides a system and a method for measuring a head-up display center error, wherein a small collimator is fixed on a collimator switching bracket, a collimator and a mechanical interface installed on the switching bracket are reserved on the head-up display, a head-up display precision test picture is controlled, the head-up display precision test picture can be seen to be overlapped with a collimator grid mark through a head-up display combined mirror, and the head-up display center error can be obtained by judging and reading the deviation between the head-up display test picture center and the collimator reference position through a visual or hand-held telescope.
Drawings
FIG. 1: the invention is a schematic diagram of the device and method for measuring the error of the center of the head-up display;
FIG. 2: is a small collimator image of the invention;
FIG. 3: displaying a central error test picture for the head-up display;
FIG. 4: displaying a central error interpretation picture for the head-up display;
FIG. 5: the invention is a flow chart of the device and the method for measuring the error of the center of the head-up display.
1-collimator, 2-switching bracket, 3-head-up display reserved mechanical interface, 4-head-up display, 5-,
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the small collimator is adopted to measure the error of the center of the head-up display, the small collimator is fixed on the collimator switching bracket, a mechanical interface for installing the collimator and the switching bracket is reserved on the head-up display, a head-up display precision test picture is controlled, the head-up display precision test picture can be seen to be overlapped with the grid mark line of the collimator through the head-up display combined mirror, and the error of the center of the head-up display test picture can be obtained by judging the deviation of the center of the head-up display test picture and the reference position of the collimator through a visual or handheld telescope.
Fig. 1 is a schematic diagram of an embodiment of the apparatus and method for measuring the center error of the head-up display according to the present invention, and it can be seen from the schematic diagram that the apparatus includes a small collimator 1, an adapter bracket 2, and a head-up display reserved mechanical interface 3.
The field of view of the compact collimator 1 of the present embodiment is not less than 3 °, the length is not more than 300mm, the parallax is not more than 1 minute, the aperture is 30mm, and 10 minute intervals of grid lines are provided, as shown in fig. 2; the switching bracket 2 is used for fixing the small collimator 1 and is connected with the head up display 4, after the switching bracket is connected with the small collimator and the head up display, the optical axis of the small collimator and the optical axis of the head up display are parallel, and the deviation is not more than 1 minute; the head-up display reserved mechanical interface 3 is used for ensuring the mounting precision of the switching bracket, and the included angle between the mounting surface of the mechanical interface and a head-up display optical axis has a deviation of not more than 1 minute;
firstly, calibrating a small collimator and a switching bracket on a special optical machine calibration table for the head up display to match the small collimator and the switching bracket with the measured head up display; then the small collimator and the switching bracket are fixedly locked; butting the calibrated small collimator and the switching bracket with a reserved mechanical interface of the head-up display to ensure that the reference surfaces of the small collimator and the switching bracket are completely attached; turning on the head-up display power supply, and controlling the head-up display power supply to display a precision test picture, wherein the precision test picture is provided with a display center identification point, as shown in FIG. 3; opening the small collimator, wherein the small collimator reticle is an equal-interval grid picture with 10 minutes per grid; the superimposed picture of the head display precision test picture and the light pipe grid is observed through the head display combination mirror 5, as shown in fig. 4, the head display center error can be obtained according to the deviation angle of the center identification point in the head display precision test picture and the light pipe grid picture center point.
As shown in fig. 5, the device and method for measuring the error of the center of the head-up display according to the present invention comprises the following steps:
1) calibrating the installation positions of the small collimator and the switching bracket to meet the measurement requirement, wherein the deviation between the optical axis of the installation surface of the switching bracket and the optical axis of the small collimator is not more than 1 minute;
2) installing the switching bracket fixed with the small collimator on the head-up display reserved mechanical interface, and completely attaching an installation surface of the expert bracket to an installation surface of the head-up display reserved mechanical interface;
3) opening the head up display and controlling the display precision test picture;
4) opening the small collimator and displaying 10-time-interval grid line pictures;
and observing a superposed picture of the head display precision test picture and the grid line picture of the small collimator through the head display combination mirror, and interpreting the error of the central identification point of the head display precision test picture deviating from the center of the small collimator to obtain the head display central error.
Claims (4)
1. A system for measuring the error of a head-up display center is characterized by comprising a collimator tube (1), a switching bracket (2) and a head-up display reserved mechanical interface (3); a reserved mechanical interface (3) is arranged on a measured product head-up display (4), a switching bracket (2) is arranged on the mechanical interface (3), a collimator tube 1 is positioned on the switching bracket (2), and the optical axis is parallel to the optical axis of a head-up display combined mirror (5); the visual field of the collimator (1) is not less than 3 degrees, the length is not more than 300mm, the parallax error is not more than 1 minute, the aperture is 30mm, and 10-minute-spaced grid lines are arranged; the mechanical interface (3) is positioned to enable the optical axis of the collimator (1) to be parallel to the optical axis of the combined plano-display mirror (5).
2. The system for measuring the center error of an overhead display according to claim 1, wherein: and the deviation of the included angle between the mounting surface of the head-up display reserved mechanical interface and the head-up display light axis is not more than 1 minute.
3. The system for measuring the center error of an overhead display according to claim 1, wherein: the deviation between the optical axis of the collimator tube (1) and the optical axis of the combined head-up display mirror (5) is not more than 1 minute.
4. A method for measuring the center error of the head-up display by adopting the system for measuring the center error of the head-up display of any one of claims 1 to 3, which is characterized by comprising the following steps:
step 1: the mounting positions of the collimator and the adapter bracket are calibrated to meet the measurement requirement, after the adapter bracket is connected with the collimator and the head displayer, the collimator and the optical axis of the head displayer are parallel, and the deviation is not more than 1 minute;
step 2: installing the switching bracket fixed with the small collimator on the head-up display reserved mechanical interface, and completely attaching the mounting surface of the switching bracket to the mounting surface of the head-up display reserved mechanical interface;
and step 3: opening the collimator, and displaying 10-time-interval grid line pictures;
and 4, step 4: and observing a superposed picture of the head display precision test picture and the grid line picture of the collimator through the head display combination mirror, wherein the deviation error of the central identification point of the head display precision test picture and the center of the collimator is the head display central error.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248713.9A CN111089708A (en) | 2019-12-09 | 2019-12-09 | System and method for measuring error of head-up display center |
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| CN201911248713.9A CN111089708A (en) | 2019-12-09 | 2019-12-09 | System and method for measuring error of head-up display center |
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| CN111089708A true CN111089708A (en) | 2020-05-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284691A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Device and method for measuring display precision of head-up display in high and low temperature environment |
| CN112326199A (en) * | 2020-10-29 | 2021-02-05 | 中国航空工业集团公司洛阳电光设备研究所 | Visual axis error verification method and system for airborne optical equipment installation |
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| CN112284691A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Device and method for measuring display precision of head-up display in high and low temperature environment |
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