CN-122017803-A - Testing device and method for maximum tracking angular velocity of photoelectric system

CN122017803ACN 122017803 ACN122017803 ACN 122017803ACN-122017803-A

Abstract

The device for testing the maximum tracking angular velocity of the photoelectric system comprises a two-degree-of-freedom turntable, an integrated light pipe assembly, a portal frame and a clock synchronization unit, wherein the integrated light pipe assembly is arranged on one side of an azimuth axis of the two-degree-of-freedom turntable, the integrated light pipe assembly comprises a collimator and a diaphragm, the portal frame consists of two upright posts and a cross beam, the upright posts are positioned outside the two-degree-of-freedom turntable, the cross beam is positioned above the two-degree-of-freedom turntable, and a mounting plate is arranged below the cross beam. Before testing, the tested photoelectric system is arranged on a mounting plate of the portal frame, so that the center of the tested photoelectric system is longitudinally aligned with the rotation axis of the two-degree-of-freedom turntable, and the critical angular speed corresponding to the time stamp obtained by the clock synchronization unit is recorded during testing. The device and the method solve the suitability problem of a two-degree-of-freedom turntable for testing a large-volume and heavy-weight photoelectric system and the reading accuracy problem of the angular speed of the two-degree-of-freedom turntable at the moment of tracking loss.

Inventors

WANG ZHENGQIANG
Guan Zhaoyang
WANG HONGBO
LIU GUOPING
LI YANSHENG
SU BIN
LI GUIXIU
ZHANG WEI
WANG CAN
CAI SHUNWEN
WANG YAN
LIU ZHUOLIN
YANG JIA
XIE HUI
SHI LIHUA
ZHANG LINBO

Assignees

昆明北方红外技术股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251031

Claims (9)

1. The device comprises a two-degree-of-freedom turntable (1), and is characterized by further comprising an integrated light pipe assembly (2), a portal frame (3) and a clock synchronization unit, wherein: The integrated light pipe assembly is arranged on one side of the azimuth axis of the two-degree-of-freedom turntable, the integrated light pipe assembly comprises a body, a black body (2-1), a reflecting mirror (2-2), a collimator (2-3), a target (2-4) and a diaphragm (2-5), the black body and the reflecting mirror are fixed on one side of the body, the collimator is fixed on the other side of the body, through holes are formed in the other side of the body, the positions of the black body (2-1), the collimator (2-3), the reflecting mirror (2-2) and the through holes correspond to each other, the target (2-4) and the diaphragm (2-5) are arranged on one side, close to the black body (2-1), of the body, of an emergent light path emitted by the black body (2-1) sequentially passes through the target (2-4), the diaphragm (2-5), the collimator (2-3) and the reflecting mirror (2-2) and finally horizontally emits from the through holes; The portal frame (3) consists of two upright posts (3-1) and a cross beam (3-2), wherein the upright posts (3-1) are positioned outside the two-degree-of-freedom turntable (1), the cross beam (3-2) is positioned above the two-degree-of-freedom turntable (1), and a mounting plate (3-3) is arranged below the cross beam (3-2); The clock synchronization unit comprises PCIe time service cards which are arranged in the two-degree-of-freedom turntable 1 and the tested photoelectric system, and the PCIe time service cards are used for realizing time service by the satellite navigation system and are used for synchronizing working clocks of the two-degree-of-freedom turntable 1 and the tested photoelectric system.
2. A test device for maximum tracking angular velocity of an optoelectronic system according to claim 1, wherein the integrated light pipe assembly further comprises two lasers.
3. A device for testing the maximum tracking angular velocity of an optoelectronic system according to claim 1, wherein the bottom of the integrated light pipe assembly (2) is provided with a lifting table (2-7), said lifting table (2-7) being located between the fuselage and the two-degree-of-freedom platform.
4. The testing device for the maximum tracking angular velocity of the photoelectric system is characterized in that a stand column (3-1) of a portal frame (3) adopts lifting columns, a plurality of mounting holes are formed in a mounting plate (3-3), and a support Ma Lun is arranged at the bottom of the stand column (3-1), and a support Ma Lun is a movable caster with telescopic supporting legs.
5. A device for testing the maximum tracking angular velocity of an optoelectronic system according to claim 1, characterized in that it further comprises a multi-line laser level, which is placed outside the portal frame (3).
6. A testing method of a testing device based on the maximum tracking angular velocity of an optoelectronic system according to claim 1, characterized by being implemented by the following steps: 1) Before testing, the tested photoelectric system is arranged on a mounting plate (3-3) of a portal frame (3), then the portal frame (3) is moved to the position above a two-degree-of-freedom rotary table (1), the integrated collimator assembly is consistent with the optical axis center of the tested photoelectric system, and the alignment is assisted by a laser (2-3); 2) During testing, the motion parameters of the two-degree-of-freedom rotary table (1) are set, the two-degree-of-freedom rotary table (1) is started, the tracking condition of the photoelectric system is observed, the angular velocity value of the two-degree-of-freedom rotary table (1) is gradually increased, and when the photoelectric system to be tested tracks a target after delaying or losing lock, the critical angular velocity corresponding to the time stamp obtained by the clock synchronization unit is recorded.
7. The method for testing the maximum tracking angular velocity of the photoelectric system according to claim 6, wherein the conversion between the projected target and the cut-off target is realized by opening and closing the diaphragm (2-2) during the test, and the inertial tracking capability test of the sudden disappearance-reappearance of the target is completed.
8. The method for testing the maximum tracking angular velocity of the photoelectric system according to claim 6, wherein the method for judging the target of tracking lag or unlocking of the photoelectric system to be tested is characterized in that the existing image recognition software is used for recognizing the coordinates of the mass center of the target, calculating the position difference between the coordinates of the mass center of the target and the center of a tracking cross in real time, and judging that the target is unlocked when the difference exceeds a preset value.
9. The method for testing maximum tracking angular velocity of a photoelectric system according to claim 6, wherein the method for testing the target centroid comprises the steps of summing products of x coordinates and corresponding pixel gray values and summing products of y coordinates and corresponding pixel gray values in a gray scale map, and dividing the products by the total gray values of a target area to obtain centroid coordinates.

Description

Testing device and method for maximum tracking angular velocity of photoelectric system Technical Field The invention relates to the field of photoelectric system detection, in particular to a device and a method for testing the maximum tracking angular velocity of a photoelectric system. Background With the development of military weapon system technology, the photoelectric system is widely applied to armed helicopters, bombers and various unmanned aerial vehicles for detecting, identifying, ranging, tracking, aiming, guiding and attacking targets and the like. The maximum tracking angular velocity of the index of the tracking capability is the capability of checking the maximum angular velocity of the dynamic target or the static state of the photoelectric system. The maximum tracking angular velocity test is generally carried out by selecting a two-degree-of-freedom turntable and a portable collimator, wherein the portable collimator is arranged on one side of the azimuth axis of the two-degree-of-freedom turntable, a photoelectric system is arranged on the pitching axis of the two-degree-of-freedom turntable during test, the rotating shaft of the photoelectric system is coaxial with the pitching axis of the two-degree-of-freedom turntable, the optical axis of the photoelectric system is aligned with the center of the optical axis of the exit pupil of the portable collimator, an infrared or visible infinity target is provided for the system during test, and the photoelectric system aims at and tracks a target projected by the portable collimator. The maximum tracking angular velocity test is divided into a target constant velocity rotation test and a target variable acceleration/deceleration test, wherein the constant velocity test method is to start the target at a low angular velocity on a two-degree-of-freedom turntable, gradually increase the rotation speed, record the critical angular velocity of the target which can still be stably locked by the photoelectric system, and the variable acceleration test method is to set the target to perform sinusoidal or trapezoidal acceleration and deceleration movement, increase the peak angular acceleration from low to high until the photoelectric system has tracking lag or lock losing, and the corresponding maximum angular velocity is the dynamic limit. In addition, in the test process, the rotation speed of the two-degree-of-freedom turntable at the moment of tracking loss usually adopts a naked eye observation method to read the critical angular velocity of the tracking lag or unlocking target of the photoelectric system, but the error between the read angular velocity and the actual angular velocity is larger, so that the test result is inaccurate. In order to ensure that the maximum tracking angular velocity test detected by the optoelectronic system is performed normally, a new device meeting the test requirement is needed. Disclosure of Invention Aiming at the problem that the existing two-degree-of-freedom turntable cannot meet the testing requirement of the maximum tracking angular speed of the photoelectric system, the invention provides a testing device and a testing method of the maximum tracking angular speed of the photoelectric system. The device comprises a two-degree-of-freedom turntable, and is characterized by further comprising an integrated light pipe assembly, a portal frame and a clock synchronization unit, wherein: The integrated light pipe assembly is arranged on one side of the azimuth axis of the two-degree-of-freedom turntable, the integrated light pipe assembly comprises a machine body, a black body, a reflecting mirror, a collimator, a target and a diaphragm, the black body and the reflecting mirror are fixed on one side of the machine body, the collimator is fixed on the other side of the machine body, through holes are formed in the other side of the machine body, the positions of the black body and the collimator, the reflecting mirror and the through holes correspond to each other, the target and the diaphragm are arranged on one side of the machine body close to the black body, and an emergent light path emitted by the black body sequentially passes through the target, the diaphragm, the collimator and the reflecting mirror and finally is emitted horizontally from the through holes; The portal frame consists of two upright posts and a cross beam, wherein the upright posts are positioned outside the two-degree-of-freedom turntable, the cross beam is positioned above the two-degree-of-freedom turntable, and a mounting plate is arranged below the cross beam; The clock synchronization unit comprises a PCIe time service card which is arranged in the two-degree-of-freedom turntable and the tested photoelectric system, and the PCIe time service card is used for realizing time service by the satellite navigation system and is used for synchronizing working clocks of the two-degree-of-freedom turntable and the tested photoelectric system