CN100504334C - The Method of Inspecting the Change of Azimuth and Direction of Infrared Optical Axis of Photoelectric Measuring Equipment Using Thermal Vertical Line - Google Patents

Abstract

The invention discloses a method for inspecting the change of the azimuth and direction of an infrared optical axis of a photoelectric measuring device by using a hot vertical line, which belongs to a detection method involved in the technical field of photoelectric instrument inspection. The technical problem to be solved is to provide a method for checking the change of the azimuth and pointing of the infrared optical axis of the photoelectric measuring device by using a thermal vertical line. The technical solution is: the established inspection and measurement system includes: suspension rings, wiring clips, cables, switches, batteries, weights, alloy steel wires, and measured instruments; the method steps are as follows: first, tie the two ends of the alloy steel wires to the suspension rings and On the heavy hammer, a vertical line is formed; secondly, connecting clips are connected to the upper and lower parts of the alloy steel wire; the cables are connected in series with switches, batteries, and connecting clips to form a power circuit; thirdly, the switch is closed, and the alloy steel wire is energized and heated. Form the vertical reference of the hot vertical line target; fourth, observe the coincidence of the vertical line of the infrared optical axis crosshair of the instrument under test and the hot vertical line when scanning from 0° horizontal angle to 65° high angle, and analyze the change of the infrared optical axis azimuth and pointing.

Description

The Method of Inspecting the Change of Azimuth and Direction of Infrared Optical Axis of Photoelectric Measuring Equipment Using Thermal Vertical Line

1. Technical field:

The invention belongs to the technical field of photoelectric instrument inspection and relates to a method for inspecting the change of the infrared optical axis direction of a large-scale photoelectric measuring device.

2. Background technology:

Large-scale photoelectric measuring equipment generally refers to large-scale photoelectric tracking and measuring theodolites such as astronomical telescopes, tracking and measuring meteorological satellite systems, and remote sensing satellite systems for resource surveys, etc., which are used for tracking stars and measuring targets; according to the needs of measurement functions, large-scale photoelectric measuring equipment It is equipped with an infrared tracking measurement system, and the pitch angle measurement range is from 0° horizontal angle to 65° high angle. In order to ensure the consistency of the measurement results, it is required that the azimuth of the optical axis of the infrared tracking measurement system on the equipment at different high-angle positions must be consistent with its azimuth at the horizontal position. Otherwise, azimuth measurement errors for the same target will be generated in the measurement results. Therefore, before the use of large-scale photoelectric measurement equipment, the optical axis of the infrared tracking measurement system must be calibrated for azimuth detection and calibration at different high-angle positions, so that the azimuth measurement error can be controlled within the allowable range of measurement accuracy.

The relevant technology belongs to the high-tech category, and the developed countries strictly block it, and no relevant technical information can be found. As far as we know, the existing method closest to the present invention is the "Parallelism Inspection Device for Three Optical Systems of Large Photoelectric Measurement and Control Equipment" developed by Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, as shown in Figure 1: the device includes reflection Mirror 1, mirror seat 2, base 3, pentaprism seat 4, first pentaprism 5, second pentaprism 6, slider guide rail 7, light source 8, reticle 9, slider 10, third pentaprism 11. Collimating objective lens 12.

The slide block guide rail 7 is fixed on the base 3, and the two ends of the slide block guide rail 7 are respectively equipped with a pentaprism seat 4 and a slide block 10, the pentaprism seat 4 is fixed at the left end of the guide rail, and the slide block 10 is at the right end of the guide rail 7 , can move left and right along the slider guide rail 7. The first five prisms 5 are fixed on the five prism base 4, and the third five prisms 11 are fixed on the slide block 10, so that the lower right-angled sides of the first five prisms 5 and the upper right-angled sides of the third five prisms 11 are parallel, and the first five prisms The vertical right-angled side of prism 5 and the vertical right-angled side of the third five-prism 11 are vertically parallel, and the second five-prism 6 is fixed on the five-prism seat 4, makes the upper right-angled side of the second five-prism 6 and the third five-prism The upper right-angled sides of 11 are horizontally parallel. The first pentaprism 5, the second pentaprism 6, the third pentaprism 11, the optical path heights of the three pentaprisms are the same. The third pentaprism 11 can move left and right along with the slider 10 along the slider guide rail 7 on the slider 10, so as to adapt to the distribution of the distance between the three optical axes on the tested instrument. The light source 8, the reticle 9 and the collimating objective lens 12 form a collimated light beam directed to the reflector 1, the reflector seat 2 is fixed on the base 3, and the reflector 1 is installed on the reflector seat 2, at a distance of 45° from the collimated light beam. ° Angle installation, the height of the collimated light path is the same as the height of the light path formed by the first, second and third pentaprisms.

The light emitted by the light source 8 is refracted by the collimating objective lens 12 and then directed to the reflector 1, and reflected by the reflector 1, a part of which directly enters the infrared optical system of the instrument under test, and the other part of the collimated light enters the first pentaprism 5 for refraction. After turning 90°, it enters the third pentaprism 11, and then turns 90° and then enters the visible optical system of the instrument under test. The optical axis of the optical system and the infrared optical system are parallel. If one of the beams of the two is imaged on the optical axis of the visible optical system, while the other collimated beam is not imaged on the optical axis of the infrared system, the above-mentioned imaging point will miss the target. The quantity is the parallelism error of the two optical axes of the visible optical system and the infrared optical system.

The main problem of this method in practical use is: since the above-mentioned device cannot provide uninterrupted continuous measurement positions from 0° horizontal angle to 65° high angle, it is impossible to test the infrared optical axis between 0° horizontal angle and 65° high angle. The continuous change and error of azimuth pointing will cause a blank section in the measurement range of 0°horizontal angle to 65°high angle in the inspection, which will cause the inspection result to deviate from the actual state.

3. Contents of the invention

In order to overcome the incompatibility of the existing methods in application, the purpose of the present invention is to meet the detection needs of the infrared system of large-scale photoelectric measuring equipment, and specially design an inspection method using the hot vertical line technology.

The problem to be solved by the present invention is to provide a method for inspecting the change of the azimuth and direction of the infrared optical axis of the photoelectric measuring equipment by using a thermal vertical line. The technical solution to solve technical problems is the established inspection and measurement system, as shown in Figure 2.

Including: suspension ring 13, a pair of terminal clips 14, cables 15, switches 16, batteries 17, weights 18, alloy steel wires 20, and instruments under test 19.

The method steps are as follows:

First, the two ends of the alloy steel wire 20 are respectively tied to the suspension ring 13 and the weight 18, and the suspension ring 13 is suspended at a high place to form a vertical line;

Secondly, at the position where the upper end of the alloy steel wire 20 is close to the suspension ring 13, and the lower end is close to the position of the weight 18, connect the clamps 14 respectively; Clamp 14 to form a energization circuit;

The 3rd, switch 16 is closed, make alloy steel wire 20 heat after electric current, form hot vertical line as target vertical datum, the infrared optical system optical axis reticle of instrument under test 19 is aligned with hot vertical line;

The 4th, carry out scanning observation between 0 ° of horizontal angles to 65 ° of high angles, in the infrared optical system monitor of the instrument under test 19, observe the overlapping situation of the thermal vertical line and the vertical line of the optical axis crosshair; in the instrument under test 19 Interpret the continuous change of its azimuth pointing and measurement error in the indication of the missed target of the infrared optical system.

Description of working principle: in application, after the switch 16 is closed, a current will pass through the alloy steel wire 20 to heat it, emit infrared rays, and form a vertical reference of the thermal vertical line target, and the infrared optical system of the instrument under test 19 (large-scale photoelectric measuring equipment) will The optical axis reticle is aligned with the vertical reference of the thermal vertical target, and the scanning observation is performed from 0°horizontal angle to 65°high angle, and the azimuth of the infrared optical system of the instrument under test 19 is pointed from 0°horizontal angle to 65°high angle Continuous changes and detection of measurement errors.

If the vertical line of the crosshair on the optical axis of the infrared optical system of the instrument under test 19 coincides with the thermal vertical line from 0° horizontal angle to 65° high angle, it proves that the optical axis of the infrared optical system is in the range from 0° to 65° high angle inside, consistent with its azimuth in the horizontal position. Will form the correct position image in Fig. 3 in the infrared optical system monitor of tested instrument 19, if the infrared optical system optical axis crosshair vertical line of tested instrument 19 is between from 0 ° horizontal angle to 65 ° high angle and If the hot vertical lines do not coincide, an erroneous image in Figure 4 will be formed in the infrared optical system monitor of the instrument under test. Through the analysis and calculation of the imaging situation, the continuous change of azimuth pointing and measurement error of the optical axis of the infrared system from 0° horizontal angle to 65° high angle can be checked.

Positive effects of the present invention: adopt thermal vertical line to form the infrared target vertical reference accepted by the infrared optical system of large-scale photoelectric measuring equipment, provide a continuous measurement range from 0° horizontal angle to 65° high angle, and solve the problem of large-scale photoelectric measuring equipment infrared optics The continuous detection of the azimuth pointing of the system in the measurement range from 0°horizontal angle to 65°high angle.

The present invention can also be used in other visible optical systems that require azimuth pointing continuity detection in different high-angle measurement ranges.

4. Description of drawings

Fig. 1 is a structural schematic diagram of the prior art.

Fig. 2 is a structural schematic diagram of the thermal plumb measurement system used in the present invention.

Figure 3 is a schematic diagram showing that the vertical line of the infrared optical axis reticle of the tested instrument coincides with the thermal vertical line from 0°horizontal angle to 65°high angle.

Figure 4 is an error image of the vertical line of the infrared optical axis reticle of the instrument under test when it does not coincide with the thermal vertical line from 0°horizontal angle to 65°high angle.

5. Specific implementation

The present invention is carried out according to the method steps mentioned in the technical scheme, wherein the suspension ring 13 in the established inspection and measurement system adopts bakelite insulating material, the terminal clamp 14 adopts alligator clips, the cable wire 15 adopts a high-temperature fluorine plastic wire with a diameter of 0.2mm, and the switch 16 adopts a single-pole switch, and the weight 18 can be made of lead, steel, iron and other materials into a cylinder or cone shape, with a weight of <10Kg. The alloy steel wire 20 is made of stainless steel or iron-nickel alloy material, with a diameter of <0.2mm, as thin as possible Long, to guarantee the tension strength that cooperates with weight 18 and from 0 ° of horizontal angle to 65 ° of high angle continuous measurement range, battery 17 uses 1.5V～6V dry battery.

Align the crosshair of the optical axis of the infrared optical system of the instrument under test 19 to the hot vertical line (alloy steel wire 20) and scan and observe continuously from 0° horizontal angle to 65° high angle.

Claims (1)

1. The method for inspecting the change of the infrared optical axis azimuth of photoelectric measuring equipment with thermal vertical line, characterized in that the established inspection and measurement system includes: a pair of suspension rings (13), a pair of connecting clips (14), cables (15), switches ( 16), battery (17), weight (18), alloy steel wire (20), tested instrument (19); method steps are as follows: First, the two ends of the alloy steel wire (20) are tied to the suspension ring (13) and the weight (18) respectively, and the suspension ring (13) is hung on a high place to form a vertical line; Secondly, at the position where the upper end of the alloy steel wire (20) is close to the suspension ring (13) and the lower end is close to the position of the weight (18), connect the clamps (14) respectively; pass the cable (15) through the serial switch (16) 1. The positive and negative poles of the battery (17) are connected to a pair of terminal clips (14) to form an electrification circuit; Third, the switch (16) is closed, and the alloy steel wire (20) is heated after passing through the current to form a thermal vertical line as the target vertical reference, and the infrared optical system optical axis crosshair of the instrument under test (19) is aligned with the thermal vertical line ; The 4th, carry out scanning observation between 0 ° of horizontal angles to 65 ° of high angles, in the infrared optical system monitor of measured instrument (19), observe the coincidence situation of thermal vertical line and optical axis cross hair vertical line; Interpret the continuous change and measurement error of its azimuth pointing in the indication of the missing target amount of the infrared optical system of the instrument (19).

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