Device and method for calibrating the optical axis of a television camera parallel to a mechanical mounting surface

Abstract

The invention discloses a calibration device and method for calibrating the parallelism between the optical axis of a television camera and the mechanical mounting surface, which relates to the technical field of optical precision instrument adjustment, and solves the problem of the parallelism between the optical axis of a television camera and the mechanical mounting surface. The device comprises a television camera housing and a tooling box; the television camera housing is a rectangular parallelepiped structure, and three mounting bosses are arranged on the bottom surface of the rectangular parallelepiped, and a positioning boss and a plurality of fastening bosses are arranged on the side surface of the rectangular parallelepiped; the tooling box is a rectangular parallelepiped structure, and positioning grooves and a plurality of square box fastening bosses are arranged on the side surface of the rectangular parallelepiped, respectively, and after the positioning boss is embedded in the positioning groove, the fastening boss corresponds to the position of the square box fastening boss; a plurality of bosses are also arranged on the bottom surface of the cube. The calibration method converts the mechanical mounting surface reference to the tooling reference surface, and by establishing the relationship between the electronic autocollimator and the tooling base surface, the tooling reference surface is converted to the electronic autocollimator optical axis reference. The invention is suitable for the error calibration of multi-gear field-of-view television cameras and the main load-bearing platform.

Description

Technical Field

[0001] The invention relates to the technical field of optical precision instrument assembly and adjustment, and in particular belongs to a method for calibrating the parallelism between the optical axis of a multi-field visible light television camera and a mechanical installation surface. Background Art

[0002] The image obtained by the visible light TV camera is consistent with the image observed by the human eye, which is very helpful for the human visual system to identify the target. It is one of the necessary sensors in the vehicle-mounted optoelectronic tracking and aiming system. Usually, the visible light TV camera subsystem, infrared subsystem, and laser subsystem are integrated on an integral main bearing platform or frame. The optical axes of the three sensors need to be calibrated parallel to ensure that the three sensors are aimed at the same target at different working distances. If the parallelism error between the optical axis of a single sensor and the mounting reference surface is too large, after integration with the main bearing frame, the consequence may be that when adjusting the consistency of the three visible light, infrared, and laser optical axes, the gap between the screw and the mounting hole cannot be adjusted back due to excessive misalignment. Or the thickness of the gasket is too large, resulting in plastic deformation of the interface base plate of the sensor, and the stability of the optical axis consistency is poor. Therefore, before integration with the main bearing platform, it is necessary to calibrate the parallelism of the optical axis of each sensor with its own mechanical mounting surface.

[0003] The existing Chinese patent document CN112882245A published on June 1, 2021, discloses an outdoor optical axis calibration device and calibration method. By transferring the reference, the reference plane of the debugging tooling plate is parallel to the optical axis of the optical device, thereby completing the calibration. However, this method calibrates the reference plane of the debugging tooling plate and the optical axis of the optical device, and does not complete the calibration of the actual product and the debugging tooling plate. In the actual installation process, there will still be problems with the installation angle between the actual product and the debugging tooling plate, resulting in poor consistency of the optical axis, and the need for secondary calibration. Summary of the invention

[0004] The invention solves the problem of parallelism between the optical axis of a television camera and a mechanical mounting surface.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for calibrating the parallelism between the optical axis of a television camera and a mechanical installation surface, the device comprising a television camera housing and a tooling box;

[0007] The TV camera housing is a rectangular parallelepiped structure, and three mounting bosses are provided on the bottom surface of the rectangular parallelepiped, and the three mounting bosses are used to fix the bottom plate of the TV camera;

[0008] The left side surface of the cuboid is respectively provided with a positioning boss and a plurality of fastening bosses;

[0009] The tooling box is a rectangular parallelepiped structure, and the sides of the rectangular parallelepiped are respectively provided with positioning grooves and a plurality of box fastening bosses, and after the positioning bosses are embedded in the positioning grooves, the positions of the plurality of fastening bosses correspond to the positions of the plurality of box fastening bosses;

[0010] A plurality of bosses are arranged on the bottom surface of the cuboid, and the plurality of bosses are evenly distributed around the bottom surface.

[0011] Furthermore, in another preferred embodiment, the surfaces A of the three mounting bosses are parallel to the upper and lower side surfaces B of the positioning boss, and the parallelism is within 0.01 degrees;

[0012] The surfaces A of the three mounting bosses are perpendicular to the surface C of the fastening boss, and the perpendicularity is within 0.01 degrees.

[0013] Furthermore, in another preferred embodiment, the surface D of the boss is parallel to the upper and lower side surfaces F in the positioning groove, and the parallelism is within 0.01 degrees;

[0014] The surface D of the boss is perpendicular to the surface E of the square box fastening boss, and the perpendicularity is within 0.01 degrees;

[0015] The surface H of the tooling box is perpendicular to the surface D of the boss, and the perpendicularity is within 0.01 degrees.

[0016] Furthermore, in a preferred embodiment, the flatness of surface E of the square box fastening boss is within 0.005 degrees; the flatness of surface D of the boss is within 0.005 degrees, and the flatness of surface H is within 0.005 degrees.

[0017] Furthermore, in a preferred embodiment, three square covers are provided on the top surface of the television camera housing; the positions of the three square covers correspond one to one with the positions of the three mounting bosses.

[0018] Furthermore, in a preferred embodiment, the device further comprises an optical adjustment platform, a marble plate, an electronic autocollimator and a standard plane reflector;

[0019] The marble slab is arranged on the optical adjustment platform;

[0020] The electronic autocollimator and the standard plane reflector are arranged on a marble plate, and the light source of the electronic autocollimator is aligned with the standard plane reflector;

[0021] The electronic autocollimator and the standard plane reflector are used to calibrate that the optical axis of the electronic autocollimator is parallel to the optical adjustment platform, and are also used to calibrate that the surface D of the boss on the bottom surface of the tooling box is parallel to the optical axis of the electronic autocollimator, and the surface D of the boss is parallel to the upper and lower side surfaces F in the positioning groove, and the reference F surface of the tooling box is converted to the X-axis direction of the crosshairs of the optical axis of the electronic autocollimator.

[0022] Furthermore, in a preferred embodiment, the upper and lower surfaces of the marble slab are parallel.

[0023] Furthermore, in a preferred embodiment, the device further comprises a gasket;

[0024] The gasket is arranged on any one of the three mounting bosses and is used to adjust the optical axis of the television camera to be parallel to the X direction of the electronic autocollimator.

[0025] Furthermore, in a preferred embodiment, the device further comprises a flat crystal;

[0026] The flat crystal is arranged on the surface H of the tooling box;

[0027] The electronic autocollimator and the flat crystal are used to calibrate the surface E of the upper box fastening boss of the tooling box to be parallel to the optical axis of the electronic autocollimator, and to convert the reference E surface of the tooling box to the Y-axis direction of the crosshairs of the optical axis of the electronic autocollimator.

[0028] The present invention also provides a method for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface. The method is implemented based on the device for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface described in any one of the above items. The method is as follows:

[0029] S1: Mount the bottom plate of the TV camera on the mounting boss on the TV camera housing, and connect and fix it with the TV camera housing by screws;

[0030] S2: embed the positioning boss on the TV camera housing into the positioning groove on the tooling box, and connect the fastening boss with the fastening boss of the box;

[0031] S3: Setting the positions of the marble plate, the optical adjustment platform, the electronic autocollimator and the standard plane reflector, and calibrating the optical axis of the electronic autocollimator to be parallel to the surface of the optical adjustment platform;

[0032] S4: Since the surface D of the boss on the tooling box is parallel to the surface of the optical adjustment platform, the surface D of the boss is parallel to the surface F of the positioning groove, and the surface E of the box fastening boss is perpendicular to the surface D of the boss, according to the reference conversion principle, the optical axis of the electronic autocollimator is parallel to the surface F of the positioning groove, and the reference F surface of the tooling box is converted to the X direction of the optical axis crosshairs of the electronic autocollimator;

[0033] S5: Take away the standard plane reflector;

[0034] S6: Adjust the relative position of the tooling box and the electronic autocollimator so that when the center of the TV camera is coaxial with the center of the electronic autocollimator, the tooling box is connected and fixed to the surface of the optical adjustment platform to ensure that the TV camera housing remains in place;

[0035] S7: attach a flat crystal to the H surface of the tooling box, calibrate the electronic autocollimator to be perpendicular to the H surface, because the H surface of the tooling box is perpendicular to the E surface of the box fastening boss, and the verticality is within 0.01 degrees, further, calibrate the electronic autocollimator to be parallel to the E surface of the box fastening boss, and convert the reference E surface of the tooling box to the Y direction of the crosshairs of the optical axis of the electronic autocollimator;

[0036] S8: Take away the flat crystal, and further fix the bottom surface of the marble plate and the surface of the optical adjustment platform with hot melt adhesive to ensure that the position of the electronic autocollimator does not move, that is, the reference is fixed;

[0037] S9: Switch the TV camera to a telephoto small field of view, using the crosshairs of the electronic autocollimator as the reference;

[0038] S10: Adjust the gap between the light hole of the TV camera bottom plate and the screw until the Y-axis direction of the crosshairs of the TV camera coincides with the Y-axis direction of the crosshairs of the electronic autocollimator; adjust the position of the gasket on the three mounting bosses until the X-axis direction of the crosshairs of the TV camera coincides with the X-axis direction of the crosshairs of the electronic autocollimator.

[0039] The beneficial effects of the present invention are:

[0040] 1. The existing published patent document: CN112882245A discloses an outdoor optical axis calibration device and calibration method. By transferring the reference, the reference plane of the debugging tooling plate is parallel to the optical axis of the optical device, thereby completing the calibration. However, this method calibrates the reference plane of the debugging tooling plate and the optical axis of the optical device, and does not complete the calibration of the actual product and the debugging tooling plate. In the actual installation process, there will still be problems with the installation angle between the actual product and the debugging tooling plate, resulting in poor consistency of the optical axis, and the need for secondary calibration. The present invention provides a device for calibrating the parallelism of a television camera optical axis and a mechanical mounting surface. The device fixes a television camera in a television camera housing as an integral system, calibrates the optical axis of an electronic autocollimator and the integral system, and continuously adjusts the position of the television camera in the television camera housing, thereby eliminating deviations between the optical axis crosshairs of the television camera and the crosshairs of the electronic autocollimator in the X direction and the Y direction, that is, completing the calibration of the actual product and the optical axis of the electronic autocollimator. Compared with the prior art, the present invention fixes the television camera in the television camera housing as an integral system for calibration, so that the television camera can be directly fixed in the television camera housing as a whole and delivered as a final product later, without the need for secondary calibration, thereby improving work efficiency. 2. The present invention provides a device for calibrating the parallelism of the optical axis of a television camera with a mechanical mounting surface. The device adopts a square tool box to simulate the main load-bearing platform for installing the television camera, and plane B and plane C on the television camera housing are set as the mechanical mounting surfaces of the television camera. By adjusting the position of the television camera in the television camera housing, the deviation between the optical axis crosshairs of the television camera and the crosshairs of the electronic autocollimator in the X direction and the Y direction is eliminated, that is, the deviation between the optical axis of the television camera and the mechanical mounting surface is eliminated, so that the optical axis of the television camera is calibrated to be parallel to the mechanical mounting surface.

[0041] Furthermore, the present invention also provides a method for calibrating the parallelism of the optical axis of a television camera and a mechanical mounting surface, by calibrating the optical axis of an electronic autocollimator to be parallel to plane F and plane E of a tooling box respectively, so that the reference of the tooling box is converted to the optical axis crosshairs of the electronic autocollimator, and thus by adjusting the position of the television camera in the television camera housing, the deviation between the optical axis crosshairs of the television camera and the crosshairs of the electronic autocollimator in the X direction and the Y direction is eliminated, that is, the deviation between the optical axis of the television camera and the mechanical mounting surface is eliminated, and the calibration of the optical axis of the television camera and the mechanical mounting surface is achieved.

[0042] Furthermore, compared with the prior art, the present invention avoids the problem that the error between the optical axis of a single sensor and the mounting reference plane is too large, and when the consistency of the three optical axes of visible light, infrared light and laser light is adjusted after integration with the main load-bearing frame, the gap between the screw and the mounting hole cannot be adjusted back due to the large misalignment. Or the thickness of the gasket is too large, resulting in plastic deformation of the interface bottom plate of the sensor and poor stability of the optical axis consistency.

[0043] Furthermore, the calibration parallel error of the parallel calibration method of the present invention is ≤1′, and when the television camera fails and needs to be repaired, the whole machine can be interchangeable.

[0044] The invention is suitable for error calibration of a multi-level viewing field television camera and a main load-bearing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a parallel calibration device and a schematic diagram of parallel calibration of the optical axis of a television camera and a mechanical mounting surface according to the present invention;

[0047] Figure 2 It is a structural schematic diagram of the television camera housing of the present invention;

[0048] Figure 3 It is a structural schematic diagram of the tooling square box of the present invention;

[0049] Figure 4 It is a schematic diagram of the connection and positioning of the TV camera housing and the tooling box according to the present invention;

[0050] Figure 5 It is a schematic diagram of calibrating the parallelism between the optical axis of the electronic autocollimator and the surface of the optical adjustment platform according to the present invention;

[0051] Figure 6 It is a schematic diagram of the parallel calibration of the optical axis of the electronic autocollimator and the E surface of the tooling box described in the present invention.

[0052] Among them, 1 - optical adjustment platform, 2 - marble plate, 3 - electronic autocollimator, 4 - TV camera housing, 41 - mounting boss, 42 - positioning boss, 43 - fastening boss, 5 - tooling square box, 51 - positioning groove, 52 - square box fastening boss, 53 - boss, 6 - TV camera, 7 - standard plane reflector, 8 - square cover, 9 - flat crystal. DETAILED DESCRIPTION

[0053] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form.

[0054] Implementation method 1, see Figures 2 to 4 This embodiment is described. This embodiment provides a device for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface. The device includes a television camera housing 4 and a tooling box 5;

[0055] The TV camera housing 4 is a rectangular parallelepiped structure, and three mounting bosses 41 are provided on the bottom surface of the rectangular parallelepiped. The three mounting bosses 41 are used to fix the bottom plate of the TV camera 6;

[0056] The left side surface of the cuboid is provided with a positioning boss 42 and a plurality of fastening bosses 43;

[0057] The tooling box 5 is a rectangular parallelepiped structure, and the sides of the rectangular parallelepiped are respectively provided with positioning grooves 51 and a plurality of box fastening bosses 52, and after the positioning bosses 42 are embedded in the positioning grooves 51, the positions of the plurality of fastening bosses 43 correspond to the positions of the plurality of box fastening bosses 52;

[0058] A plurality of bosses 53 are disposed on the bottom surface of the cuboid, and the plurality of bosses 53 are evenly distributed around the bottom surface.

[0059] In practical application, if Figure 2 As shown, the TV camera housing 4 is a rectangular structure, and three mounting bosses 41 are provided on the bottom surface of the rectangular structure, so that when used, the TV camera 6 is installed in the TV camera housing 4, and the bottom plate of the TV camera 6 is mounted on the surface A of the three mounting bosses 41 of the TV camera housing 4, and is connected and fixed to the TV camera housing 4 by screws.

[0060] like Figure 2 As shown, a rectangular positioning boss 42 is provided on the left side of the TV camera housing 4. The upper and lower planes of the positioning boss 42 are positioning surfaces for limiting the rotation of the TV camera 6 around the Y-axis and around the X-axis, and are defined as planes B.

[0061] The left side of the TV camera housing 4 is also provided with four fastening bosses 43, each of which is provided with threaded holes, and the plane defined by the four fastening bosses 43 is a positioning surface for limiting the rotation of the TV camera 6 around the Z-axis direction, which is defined as plane C. Plane B and plane C are mechanical mounting surfaces of the TV camera 6.

[0062] like Figure 3As shown, the tooling box 5 is used to simulate the main load-bearing platform for installing the TV camera 6. Four bosses 53 are provided on the bottom surface of the tooling box 5. The plane determined by the four bosses 53 is defined as plane D, and the flatness is within 0.005 degrees.

[0063] The side of the tooling box 5 is provided with four box fastening bosses 52 , and the plane defined by the four box fastening bosses 52 is defined as plane E, and the flatness thereof is within 0.005 degrees.

[0064] A rectangular positioning groove 51 is also provided on the side of the tooling box 5 , and the upper and lower surfaces of the rectangular positioning groove 51 are working surfaces, which are defined as plane F.

[0065] So that when applied, Figure 4 As shown, the positioning boss 42 on the Y-axis positioning surface of the TV camera housing 4 is inserted into the positioning groove 51 of the tooling box 5, and the upper and lower surfaces are tightly matched. The X- and Z-axis positioning surfaces of the TV camera housing 4 are close to the plane E of the tooling box 5. The TV camera housing 4 is connected and fixed to the box fastening boss 52 on the tooling box 5 through the threaded holes of the fastening boss 43 on the plane C. The installation direction of the TV camera housing 4 needs to be consistent with the actual application direction.

[0066] The present embodiment provides a device for calibrating the parallelism of the optical axis of a television camera with a mechanical mounting surface. The device adopts a tooling box 5 to simulate the main load-bearing platform for installing a television camera 6, and sets plane B and plane C on a television camera housing 4 as the mechanical mounting surfaces of the television camera 6. By adjusting the position of the television camera 6 in the television camera housing 4, the deviation between the optical axis crosshairs of the television camera 6 and the crosshairs of the electronic autocollimator in the X direction and the Y direction is eliminated, that is, the deviation between the optical axis of the television camera 6 and the mechanical mounting surface is eliminated, so that the optical axis of the television camera is calibrated to be parallel to the mechanical mounting surface.

[0067] Implementation Method 2: See Figure 2 This embodiment is described as follows. This embodiment is an example of the positional relationship between the surface A of the mounting boss 41 in the device for calibrating the optical axis of a television camera and the mechanical mounting surface in parallel with the first embodiment, and the upper and lower side surfaces B of the positioning boss 42 and the surface C of the fastening boss 43;

[0068] The surfaces A of the three mounting bosses 41 are parallel to the upper and lower side surfaces B of the positioning boss 42, and the parallelism is within 0.01 degrees;

[0069] The surfaces A of the three mounting bosses 41 are perpendicular to the surface C of the fastening boss 43 , and the perpendicularity is within 0.01 degrees.

[0070] In practical application, if Figure 2As shown, plane A of the TV camera housing 4 is parallel to plane B, and the parallelism is required to be within 0.01 degrees. At the same time, plane A is perpendicular to plane C, and the perpendicularity is required to be within 0.01 degrees. The shape and position tolerances are guaranteed by machining.

[0071] Implementation method three, see Figure 3 This embodiment is described as follows. This embodiment is an example of the positional relationship between the surface D of the boss 53 in the device for calibrating the optical axis of a television camera and the mechanical mounting surface in parallel with the first embodiment and the upper and lower side surfaces F of the positioning groove 51 and the surface E of the square box fastening boss 52;

[0072] The surface D of the boss 53 is parallel to the upper and lower side surfaces F of the positioning groove 51, and the parallelism is within 0.01 degrees;

[0073] The surface D of the boss 53 is perpendicular to the surface E of the box fastening boss 52, and the perpendicularity is within 0.01 degrees;

[0074] The surface H of the tooling box 5 is perpendicular to the surface D of the boss 53, and the perpendicularity is within 0.01 degrees.

[0075] In practical application, if Figure 3 As shown, the tooling box 5 is based on plane D, plane D is parallel to plane F, and the parallelism is within 0.01 degrees. Plane E is perpendicular to plane D, and the perpendicularity is within 0.01 degrees. The surface H of the tooling box 5 is perpendicular to the surface D of the boss 53, and the perpendicularity is within 0.01 degrees. The geometric tolerance is guaranteed by machining.

[0076] Embodiment 4: This embodiment is an example of the flatness of the surface E of the square box fastening boss 52, the surface D of the boss 53 and the surface H of the tooling square box 5 in the device for calibrating the parallelism between the optical axis of a television camera and the mechanical mounting surface described in Embodiment 3;

[0077] The flatness of the surface E of the box fastening boss 52 is within 0.005 degrees;

[0078] The flatness of the surface D of the boss 53 is within 0.005 degrees, and the flatness of the surface H is within 0.005 degrees.

[0079] Implementation method 5: See Figure 2 This embodiment is described as follows: This embodiment is an example of the TV camera housing 4 in the device for calibrating the parallelism between the optical axis of a TV camera and the mechanical mounting surface described in the first embodiment;

[0080] Three square covers 8 are also provided on the top surface of the television camera housing 4 .

[0081] In practical application, if Figure 2 As shown, three square covers 8 are also provided on the top surface of the TV camera housing 4, so that after the three square covers 8 are removed, the screws connecting the bottom plate of the TV camera 6 and the TV camera housing 4 can be seen. Since there is a gap between the light hole of the bottom plate of the TV camera 6 and the screws, the gap is used to adjust the optical axis crosshairs of the TV camera 6 to move along the X-axis direction of the crosshairs of the electronic autocollimator 3 until the Y-axis direction of the crosshairs of the TV camera 6 coincides with the Y-axis direction of the crosshairs of the electronic autocollimator 3, that is, the optical axis of the TV camera 6 is calibrated to be parallel to the surface C of the fastening boss 43, thereby achieving the calibration of the optical axis of the TV camera 6 to be parallel to the mechanical mounting surface C.

[0082] Implementation Method 6: See Figure 5 This embodiment is described. This embodiment is based on the calibration device for calibrating the optical axis of a television camera and a mechanical mounting surface in parallel as described in the first embodiment. An optical adjustment platform 1, a marble plate 2, an electronic autocollimator 3 and a standard plane reflector 7 are added.

[0083] The marble plate 2 is arranged on the optical adjustment platform 1;

[0084] The electronic autocollimator 3 and the standard plane reflector 7 are arranged on the marble plate 2, and the light source of the electronic autocollimator 3 is aligned with the standard plane reflector 7;

[0085] The electronic autocollimator 3 and the standard plane reflector 7 are used to calibrate that the optical axis of the electronic autocollimator 3 is parallel to the optical adjustment platform 1, and are also used to calibrate that the surface D of the boss 53 on the bottom surface of the tooling box 5 is parallel to the optical axis of the electronic autocollimator 3. The surface E of the box fastening boss 52 on the upper side of the tooling box 5 is calibrated to be parallel to the optical axis of the electronic autocollimator 3 through the electronic autocollimator 3 and the flat crystal 9, and the plane E of the tooling box 5 is further converted to the Y-axis direction of the optical axis crosshairs of the electronic autocollimator 3. The surface D of the boss 53 is parallel to the upper and lower side surfaces F in the positioning groove 51, and the reference F surface of the tooling box 5 is converted to the X-axis direction of the optical axis crosshairs of the electronic autocollimator 3. When the center of the TV camera 6 is coaxial with the center of the electronic autocollimator 3, the position of the TV camera 6 is adjusted to eliminate the deviation of the optical axis crosshairs of the TV camera 6 and the crosshairs of the electronic autocollimator 3 in the X and Y directions.

[0086] In practical application, if Figure 5As shown, firstly, the marble plate 2 is set on the optical adjustment platform 1, and then the electronic autocollimator 3 and the standard plane reflector 7 are set on the marble plate 2, and the light source of the electronic autocollimator 3 is aligned with the standard plane reflector 7. Based on the principle of autocollimation, the optical axis of the electronic autocollimator 3 is calibrated to be parallel to the surface of the marble plate 2. The upper and lower surfaces of the marble plate 2 are parallel. According to the principle of reference conversion, the parallelism of the optical axis of the electronic autocollimator 3 and the surface D of the boss 53 on the bottom surface of the tooling box 5 is further calibrated, so that the plane D reference of the tooling box 5 is transferred to the X-axis direction of the optical axis of the electronic autocollimator 3. Since the surface D of the boss 53 on the bottom surface of the tooling box 5 is parallel to the surface of the optical adjustment platform 1, the surface D of the tooling box 5 is parallel to the surface F of the positioning groove 51, and the surface E of the tooling box 5 is perpendicular to the surface D. According to the principle of reference conversion, the optical axis of the electronic autocollimator 3 is parallel to the surface F of the positioning groove 51 of the tooling box 5, and the reference F surface of the tooling box 5 is converted to the X-direction of the optical axis crosshairs of the electronic autocollimator 3. The electronic autocollimator 3 and the flat crystal 9 are used to calibrate the surface E of the box fastening boss 52 on the upper side of the tooling box 5 to be parallel to the optical axis of the electronic autocollimator 3, and further convert the plane E of the tooling box 5 to the Y-axis direction of the optical axis crosshairs of the electronic autocollimator 3. The tooling box 5 is further connected and fixed to the surface of the optical adjustment platform 1 to ensure that the TV camera housing 4 is fixed, and the bottom surface of the marble slab 2 is fixed to the surface of the optical adjustment platform 1 to ensure that the position of the electronic autocollimator 3 is fixed, that is, the reference is fixed. In this way, the position of the TV camera 6 is adjusted, the deviation between the optical axis crosshairs of the TV camera 6 and the crosshairs of the electronic autocollimator 3 in the X and Y directions is eliminated, and the calibration of the TV camera optical axis is parallel to the mechanical mounting surface.

[0087] Embodiment 7. This embodiment is an example of the marble plate 2 in the device for calibrating the optical axis of a television camera and the mechanical mounting surface to be parallel to each other as described in Embodiment 7.

[0088] The upper and lower surfaces of the marble slab 2 are parallel.

[0089] Embodiment 8: This embodiment adds a gasket based on the calibration device for calibrating the optical axis of a television camera and a mechanical mounting surface to be parallel to each other as described in Embodiment 1;

[0090] The gasket is arranged on any one of the three mounting bosses 41 and is used to adjust the optical axis of the television camera 6 to be parallel to the X direction of the electronic autocollimator 3 .

[0091] In actual application of this embodiment, by adding a gasket under the bottom plate of the TV camera 6, the optical axis crosshairs of the TV camera 6 are adjusted to move along the Y-axis direction of the crosshairs of the electronic autocollimator 3 until the X-axis of the crosshairs of the TV camera 6 coincides with the X-direction of the crosshairs of the electronic autocollimator 3, that is, the optical axis of the TV camera 6 is calibrated to be parallel to the upper and lower planes B of the positioning boss 42, thereby eliminating the deviation of the optical axis crosshairs of the TV camera 6 and the crosshairs of the electronic autocollimator 3 in the Y direction, and achieving the calibration of the optical axis of the TV camera to be parallel to the mechanical mounting surface B.

[0092] Implementation method 9: See Figure 6 This embodiment is described. This embodiment is based on the calibration device for calibrating the optical axis of a television camera and a mechanical mounting surface to be parallel to each other as described in the eighth embodiment, and a flat crystal 9 is added.

[0093] The flat crystal 9 is arranged on the surface H of the tooling box 5;

[0094] The electronic autocollimator 3 and the flat crystal 9 are used to calibrate the surface E of the upper box fastening boss 52 of the tooling box 5 to be parallel to the optical axis of the electronic autocollimator 3, and to convert the reference E surface of the tooling box 5 to the Y-axis direction of the optical axis crosshairs of the electronic autocollimator 3.

[0095] In practical application, if Figure 6 As shown, the flat crystal 9 is set on the surface H of the tooling box 5; the electronic autocollimator 3 and the flat crystal 9 are used to calibrate the surface E of the box fastening boss 52 on the upper side of the tooling box 5 to be parallel to the optical axis of the electronic autocollimator 3, and further convert the plane E reference of the tooling box 5 to the Y-axis direction of the optical axis crosshairs of the electronic autocollimator 3.

[0096] Implementation Method 10: See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 This embodiment is described. This embodiment provides a parallel calibration method for a television camera optical axis and a mechanical mounting surface. The parallel calibration method is implemented based on a television camera optical axis and a mechanical mounting surface parallel calibration device described in any one of Embodiments 1 to 9. The parallel calibration method is:

[0097] S1: Mount the bottom plate of the TV camera on the mounting boss on the TV camera housing, and connect and fix it with the TV camera housing by screws;

[0098] S2: embed the positioning boss on the TV camera housing into the positioning groove on the tooling box, and connect the fastening boss with the fastening boss of the box;

[0099] S3: Setting the positions of the marble plate, the optical adjustment platform, the electronic autocollimator and the standard plane reflector, and calibrating the optical axis of the electronic autocollimator to be parallel to the surface of the optical adjustment platform;

[0100] S4: Since the surface D of the boss on the tooling box is parallel to the surface of the optical adjustment platform, the surface D of the boss is parallel to the surface F of the positioning groove, and the surface E of the box fastening boss is perpendicular to the surface D of the boss, according to the reference conversion principle, the optical axis of the electronic autocollimator is parallel to the surface F of the positioning groove, and the reference F surface of the tooling box is converted to the X direction of the optical axis crosshairs of the electronic autocollimator;

[0101] S5: Take away the standard plane reflector;

[0102] S6: Adjust the relative position of the tooling box and the electronic autocollimator so that when the center of the TV camera is coaxial with the center of the electronic autocollimator, the tooling box is connected and fixed to the surface of the optical adjustment platform to ensure that the TV camera housing remains in place;

[0103] S7: attach a flat crystal to the H surface of the tooling box, calibrate the electronic autocollimator to be vertical to the H surface, calibrate the electronic autocollimator to be parallel to the E surface of the box fastening boss, and convert the reference E surface of the tooling box to the Y direction of the crosshairs of the optical axis of the electronic autocollimator;

[0104] S8: Take away the flat crystal, and fix the bottom surface of the marble slab and the surface of the optical adjustment platform;

[0105] S9: Switch the TV camera to a telephoto small field of view, using the crosshairs of the electronic autocollimator as the reference;

[0106] S10: Adjust the gap between the light hole of the TV camera bottom plate and the screw until the Y-axis direction of the crosshairs of the TV camera coincides with the Y-axis direction of the crosshairs of the electronic autocollimator; adjust the position of the gasket on the three mounting bosses until the X-axis direction of the crosshairs of the TV camera coincides with the X-axis direction of the crosshairs of the electronic autocollimator.

[0107] In practical application of this embodiment, the parallel calibration method of the television camera optical axis and the mechanical installation surface is specifically as follows:

[0108] Step 1: If Figure 2 As shown, the TV camera 6 is installed in the TV camera housing 4, and the bottom plate of the TV camera 6 is installed on the surface A of the three mounting bosses 41 of the TV camera housing 4, and is connected and fixed to the TV camera housing 4 by screws.

[0109] Step 2: If Figure 4As shown, the positioning boss 42 on the Y-axis positioning surface of the TV camera housing 4 is inserted into the positioning groove 51 of the tooling box 5, and the upper and lower surfaces are tightly matched. The X- and Z-axis positioning surfaces of the TV camera housing 4 are close to the plane E of the tooling box 5. The TV camera housing 4 is connected and fixed to the box fastening boss 52 on the tooling box 5 through the threaded hole of the housing fastening boss 43 on the plane C. The installation direction of the TV camera housing 4 needs to be consistent with the actual application direction.

[0110] Step 3: If Figure 5 As shown, a marble plate 2 is arranged on the optical adjustment platform 1, an electronic autocollimator 3 and a standard plane reflector 7 are arranged on the marble plate 2, and the light source of the electronic autocollimator 3 is aligned with the standard plane reflector 7. According to the reference conversion principle, the optical axis of the electronic autocollimator 3 is calibrated to be parallel to the surface of the optical adjustment platform 1;

[0111] Step 4: Since the plane D of the tooling box 5 is parallel to the surface of the optical adjustment platform 1, the plane D of the tooling box 5 is parallel to the plane F of the positioning groove 51, and the plane E of the tooling box 5 is perpendicular to the plane D, according to the reference conversion principle, the optical axis of the electronic autocollimator 3 is parallel to the plane F of the positioning groove 51 of the tooling box 5, so as to realize the conversion of the reference F surface of the tooling box 5 to the X direction of the optical axis crosshairs of the electronic autocollimator 3.

[0112] Step 5: Take away the standard plane reflector 7.

[0113] Step 6: Adjust the relative position of the tooling box 5 and the electronic autocollimator 3. When the center of the TV camera 6 is coaxial with the center of the electronic autocollimator 3, fix the tooling box 5 to the surface of the optical adjustment platform 1 with screws to ensure that the TV camera housing 4 remains in place.

[0114] Step 7: If Figure 6 As shown, a flat crystal is attached to the H surface of the tooling box 5, and the optical axis of the electronic autocollimator 3 is calibrated to be perpendicular to the H surface of the tooling box 5. Since the H surface of the tooling box 5 is perpendicular to the E surface, and the verticality is within 0.01 degrees, further, the electronic autocollimator optical axis is calibrated to be parallel to the E surface. The reference E surface of the tooling box 5 is converted to the Y direction of the optical axis crosshairs of the electronic autocollimator 3.

[0115] Step 8: Take away the flat crystal 9.

[0116] Step nine: further fix the bottom surface of the marble slab 2 and the surface of the optical adjustment platform 1 with hot melt adhesive to ensure that the position of the electronic autocollimator 3 does not move, that is, the reference is fixed.

[0117] Step 10: Switch the TV camera 6 to a long focal length with a small field of view, taking the crosshairs of the electronic autocollimator 3 as a reference.

[0118] Step 11: There is a certain deviation between the optical axis crosshairs of the TV camera 6 and the crosshairs of the electronic autocollimator 3 in both the X and Y directions. The deviation is the deviation between the optical axis of the TV camera 6 and the mechanical mounting surface, and the deviation needs to be eliminated by adjustment.

[0119] Step 12: Figure 1 As shown, by opening the three square covers 8 above the TV camera housing 4, the screws connecting the bottom plate of the TV camera 6 and the TV camera housing 4 can be seen. Since there is a gap between the light hole of the bottom plate of the TV camera 6 and the screws, the gap is used to adjust the optical axis crosshairs of the TV camera 6 to move along the X-axis direction of the crosshairs of the electronic autocollimator 3 until the Y-axis direction of the crosshairs of the TV camera 6 coincides with the Y-axis direction of the crosshairs of the electronic autocollimator 3, that is, the optical axis of the TV camera 6 is calibrated to be parallel to the plane C. Further, a gasket is added under the bottom plate of the TV camera 6, and by adjusting the optical axis crosshairs of the TV camera 6 to move along the Y-axis direction of the crosshairs of the electronic autocollimator 3 until the X-axis direction of the crosshairs of the TV camera 6 coincides with the X-axis direction of the crosshairs of the electronic autocollimator 3, that is, the optical axis of the TV camera 6 is calibrated to be parallel to the plane B, thereby eliminating the deviation between the optical axis of the TV camera 6 and the mechanical mounting surface, and achieving the calibration of the optical axis of the TV camera to be parallel to the mechanical mounting surface.

[0120] The present embodiment provides a method for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface. The tooling box 5 is used to simulate the main load-bearing platform for installing the television camera 6, and the plane B and the plane C on the television camera housing 4 are set as the mechanical mounting surfaces of the television camera 6. The optical axis of the electronic autocollimator 3 is calibrated to be parallel to the plane D of the tooling box 5, so that the reference of the tooling box 5 is converted to the optical axis crosshairs of the electronic autocollimator 3. Thus, by adjusting the position of the television camera 6 in the television camera housing 4, the deviation between the optical axis crosshairs of the television camera 6 and the crosshairs of the electronic autocollimator 3 in the X direction and the Y direction is eliminated, that is, the deviation between the optical axis of the television camera 6 and the mechanical mounting surface is eliminated. The mechanical mounting surface reference is converted to the tooling box 5 reference surface. By establishing the relationship between the electronic autocollimator 3 and the tooling box 5 base surface, the tooling box 5 reference surface is converted to the optical axis reference of the electronic autocollimator 3, and the optical axis of the television camera 6 is calibrated to be parallel to the mechanical mounting surface, solving the parallel problem of the optical axis of the television camera 6 and the mechanical mounting surface. This embodiment provides a parallel calibration method for the optical axis of a multi-field television camera and the mechanical mounting surface. Compared with the prior art, it avoids the problem that the gap between the screw and the mounting hole cannot be adjusted back due to the large misalignment when adjusting the consistency of the three-light visible light, infrared, and laser optical axes after integration with the main load-bearing frame due to the large parallelism error between the optical axis of a single sensor and the mounting reference surface. Or the gasket thickness is too large, resulting in plastic deformation of the interface base plate of the sensor and poor stability of the optical axis consistency.

[0121] Furthermore, those skilled in the art may combine and associate different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

[0122] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways.

Claims

1. A device for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface, characterized in that: The device comprises a television camera housing (4) and a tooling box (5); The television camera housing (4) is a rectangular parallelepiped structure, and three mounting bosses (41) are provided on the bottom surface of the rectangular parallelepiped. The three mounting bosses (41) are used to fix the bottom plate of the television camera (6); A positioning boss (42) and a plurality of fastening bosses (43) are respectively provided on the left side surface of the rectangular parallelepiped; The tooling box (5) is a rectangular parallelepiped structure, and the sides of the rectangular parallelepiped are respectively provided with positioning grooves (51) and a plurality of box fastening bosses (52), and after the positioning bosses (42) are embedded in the positioning grooves (51), the positions of the plurality of fastening bosses (43) and the plurality of box fastening bosses (52) correspond to each other; A plurality of bosses (53) are provided on the bottom surface of the rectangular parallelepiped, and the plurality of bosses (53) are evenly distributed around the bottom surface; The surfaces A of the three mounting bosses (41) are parallel to the upper and lower side surfaces B of the positioning boss (42), and the parallelism is within 0.01 degrees; The surfaces A of the three mounting bosses (41) are perpendicular to the surface C of the fastening boss (43), and the perpendicularity is within 0.01 degrees; The surface D of the boss (53) is parallel to the upper and lower side surfaces F of the positioning groove (51), and the parallelism is within 0.01 degrees; The surface D of the boss (53) is perpendicular to the surface E of the box fastening boss (52), and the perpendicularity is within 0.01 degrees; The surface H of the tooling box (5) is perpendicular to the surface D of the boss (53), and the perpendicularity is within 0.01 degrees; The flatness of the surface E of the square box fastening boss (52) is within 0.005 degrees; The flatness of the surface D of the boss (53) is within 0.005 degrees, and the flatness of the surface H is within 0.005 degrees.

2. The parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to claim 1, characterized in that: Three square covers (8) are also provided on the top surface of the television camera housing (4); The positions of the three square covers (8) correspond one-to-one to the positions of the three mounting bosses (41).

3. The parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to claim 1, characterized in that: The device also includes an optical adjustment platform (1), a marble plate (2), an electronic autocollimator (3) and a standard plane reflector (7); The marble plate (2) is arranged on the optical adjustment platform (1); The electronic autocollimator (3) and the standard plane reflector (7) are arranged on the marble plate (2), and the light source of the electronic autocollimator (3) is aligned with the standard plane reflector (7); The electronic autocollimator (3) and the standard plane reflector (7) are used to calibrate that the optical axis of the electronic autocollimator (3) is parallel to the optical adjustment platform (1), and are also used to calibrate that the surface D of the boss (53) on the bottom surface of the tooling box (5) is parallel to the optical axis of the electronic autocollimator (3).

4. The parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to claim 3, characterized in that: The upper and lower surfaces of the marble slab (2) are parallel.

5. The parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to claim 4, characterized in that: The device also includes a gasket; The gasket is arranged on any one of the three mounting bosses (41) and is used to adjust the optical axis of the television camera (6) to be parallel to the X direction of the electronic autocollimator (3).

6. The parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to claim 5, characterized in that: The device also includes a flat crystal (9); The flat crystal (9) is arranged on a surface H of the tooling box (5); The electronic autocollimator (3) and the flat crystal (9) are used to calibrate the surface E of the upper box fastening boss (52) of the tooling box (5) to be parallel to the optical axis of the electronic autocollimator (3), and to convert the reference E surface of the tooling box (5) to the Y-axis direction of the crosshairs of the optical axis of the electronic autocollimator (3).

7. A method for calibrating the parallelism between the optical axis of a television camera and a mechanical mounting surface, characterized in that: The method is implemented based on the parallel calibration device for the optical axis of a television camera and a mechanical mounting surface according to any one of claims 1 to 6, and the method is: S1: Mounting the base plate of the TV camera on the mounting boss on the TV camera housing; S2: embed the positioning boss on the TV camera housing into the positioning groove on the tooling box, and connect the fastening boss with the fastening boss of the box; S3: Setting the positions of the marble plate, the optical adjustment platform, the electronic autocollimator and the standard plane reflector, and calibrating the optical axis of the electronic autocollimator to be parallel to the surface of the optical adjustment platform; S4: Since the surface D of the boss on the tooling box is parallel to the surface of the optical adjustment platform, the surface D of the boss is parallel to the surface F of the positioning groove, and the surface E of the box fastening boss is perpendicular to the surface D of the boss, according to the reference conversion principle, the optical axis of the electronic autocollimator is parallel to the surface F of the positioning groove, and the reference F surface of the tooling box is converted to the X direction of the optical axis crosshairs of the electronic autocollimator; S5: Take away the standard plane reflector; S6: Adjust the relative position of the tooling box and the electronic autocollimator so that when the center of the TV camera is coaxial with the center of the electronic autocollimator, the tooling box is connected and fixed to the surface of the optical adjustment platform to ensure that the TV camera housing remains in place; S7: attach a flat crystal to the H surface of the tooling box, calibrate the electronic autocollimator to be vertical to the H surface, calibrate the electronic autocollimator to be parallel to the E surface of the box fastening boss, and convert the reference E surface of the tooling box to the Y direction of the crosshairs of the optical axis of the electronic autocollimator; S8: Take away the flat crystal, and fix the bottom surface of the marble slab and the surface of the optical adjustment platform; S9: Switch the TV camera to a telephoto small field of view, using the crosshairs of the electronic autocollimator as the reference; S10: Adjust the gap between the light hole of the TV camera bottom plate and the screw until the Y-axis direction of the crosshairs of the TV camera coincides with the Y-axis direction of the crosshairs of the electronic autocollimator; adjust the position of the gasket on the three mounting bosses until the X-axis direction of the crosshairs of the TV camera coincides with the X-axis direction of the crosshairs of the electronic autocollimator.

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