Between advancing, follows the tracks of by a kind of self-propelled gun lasting accuracy method of testing and deviceTechnical field
The present invention relates to a kind of self-propelled gun dynamic stability accuracy test method and testing arrangement, belong to the Detection Technology and Automatic Equipment field.
Background technology
Cannon is one of most widely used, equipment amount maximum, lethal strong conventional weapon.The lasting accuracy of self-propelled gun directly reacts the performance of self-propelled gun, and the lasting accuracy of self-propelled gun is high more, and the probability that the target wound is ruined is just big more; It transfers the big gun precision high more, then just can be active when implementing to hit.Therefore, the lasting accuracy of self-propelled gun and accent big gun precision are the guarantees of on the battlefield target effectively being hit.Therefore the lasting accuracy to self-propelled gun is very crucial and requisite with transferring the big gun precision to test.
Along with the science and technology development progress, the development of the measuring technology of self-propelled gun is very rapid, and test automation, intelligent degree improve day by day.Self-propelled gun dynamic stability precision is meant the lasting accuracy of self-propelled gun system gun tube under travel condition, promptly measure gun tube in the orientation to pitching to the actual deflection angle, in the development and production process of self-propelled gun, usually adopt the multi-degree-of-freedom motion platform motion state of simulation self-propelled gun system under varying environment very true to nature, but traditional method of testing is difficult to remove the gun tube translational movement that produces because of the base translation of big gun body.The translation variable quantity is introduced in motion at motion simulator, mostly adopt parallel light tube simulation infinity target at present, thereby significantly reduced the influence of translational movement to lasting accuracy, but the parallel light tube test specification is very little, test process complexity and cost height.The tracking accuracy of self-propelled gun is meant cannon in the precision of a tracking target of advancing, and does not also have relevant testing equipment at present.
Summary of the invention
The objective of the invention is to solve present self-propelled gun dynamic stability accuracy test and be difficult to remove gun tube translational movement and the little problem of test specification that produces because of the base translation of big gun body, following the tracks of lasting accuracy method of testing and device between a kind of self-propelled gun disclosed by the invention is advanced can eliminate the gun tube translational movement effectively and only keep rotation amount, test specification is big, and can realize the test of cannon tracking accuracy.
Following the tracks of the lasting accuracy method of testing between a kind of self-propelled gun disclosed by the invention is advanced is:
Step 1 starts test and carries out the measurement of cannon initial position.
Tested self-propelled gun is placed on the multifreedom motion simulator, be parallel to laser instrument of firepower line fixed installation on the gun tube, the laser beam that sends can form hot spot respectively on the target surface of front and back, cannon transfers big gun after orientation and a certain angle of pitching, target surface moves before and after the control, and the light beam that laser instrument is sent passes through former and later two target surfaces.Obtain the image coordinate of hot spot on two target surfaces by the image processing, and be converted to the actual coordinate on target surface, thereby obtain the initial position of gun tube.
Step 2 after measuring through the initial position of step 1, is carried out the dynamic stability accuracy test.
Start the multifreedom motion simulator, fixed armament gun tube angle is motionless, gather the light spot image of front and back target surface in real time and handle the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, actual coordinate by hot spot on two targets of the parallel placement in front and back subtracts each other, can eliminate the gun tube translational movement, obtain the cannon gun tube be engraved at this moment orientation and pitching to angle, with last one constantly the angle of gun tube compare can obtain cannon when a certain angle pitching to the orientation to the angular deflection amount, when multifreedom motion simulator during, in the certain hour section, can count the dynamic stability precision of self-propelled gun according to different regular movement.
Step 3, the test of self-propelled gun tracking accuracy.
Set the self-propelled gun fire control system by the fixed curve motion, start the multifreedom motion simulator simultaneously, self-propelled gun gun tube setting in motion, the front and back target surface is followed the tracks of laser facula and is moved, gather the light spot image of front and back target surface in real time and handle the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, with the set-point of current time compare can obtain self-propelled gun in pitching and orientation to departure, through counting the performance indications such as tracking accuracy of tested self-propelled gun after a while.Because target surface can move in real time before and after in this method of testing, realized a self-propelled gun tracking accuracy test of advancing.
Follow the tracks of self-propelled gun that the lasting accuracy method of testing makes between advancing according to a kind of self-propelled gun of the present invention and follow the tracks of the lasting accuracy testing arrangement between advancing, comprise laser instrument, preceding target surface stand and auxiliary moving device, preceding target surface, front target ccd video camera, back target surface stand and auxiliary moving device, back target surface, back target ccd video camera and control module.Ancillary equipment comprises multifreedom motion analog platform and tested big gun body.
Laser instrument is parallel to the firepower line and is fixed on the gun tube, sends beam of laser in test process, and forms hot spot clearly on the target surface of front and back.By a wireless remote controller control laser instrument break-make.
The removable pair of target surface is placed on the target surface stand position over against gun muzzle, wherein before target surface can guarantee that more clear hot spot imaging also can see through most of light; Back target surface can not cause the surface brightness variation and can form hot spot clearly because of veiling glare.In the test process, the light beam that laser instrument sent imaging on the target surface of front and back respectively.At two target surface edges some spots is arranged respectively, be used for demarcating.
Two table top battle array ccd video cameras, the rear of target surface before and after being placed in respectively, camera lens all towards the direction of target surface, is installed with a fixed angle of altitude, guarantees that target surface is full of the field range of area array camera.Array CCD Camera is taken in real time to target surface, and the image of shooting is transferred in the observing and controlling computer by image pick-up card.
The image transitions that image pick-up card photographs video camera is that digital data transmission is in the observing and controlling computer.
Control module is made up of observing and controlling computer and servo control mechanism controller, and wherein the observing and controlling computer is the core of whole testing device.When initial alignment, the control video camera is taken target surface, discerns and note the coordinate of calibration point on the target surface.Two table top battle array ccd video cameras expose synchronously before and after the control in test process, and to camera acquisition to the target surface light spot image discern and calculate, calculate the true coordinate of hot spot according to the size of the coordinate of calibration point and test zone, thereby calculate the dynamic property of self-propelled gun, and demonstrate test result in real time; Target surface moved before and after the servomotor of target surface was realized before and after the major control of servo control mechanism controller.
The target surface stand is made up of rigid support and auxiliary moving device, wherein auxiliary moving device comprises four servomotors and guide rail and ball-screw, auxiliary moving device is used for before and after the test process about removable target surface, follow the tracks of representation of laser facula up and down moves, to adapt to the test request of different angles and tracking accuracy.Target surface can be followed the tracks of laser facula by auxiliary moving device and moves up and down before and after in the test process, has increased cannon dynamic stability accuracy test scope, has also realized the tracking accuracy test of self-propelled gun simultaneously.
Annexation is between the testing arrangement each several part: tested big gun body is installed on the multifreedom motion simulator; Laser instrument and firepower line parallel are fixed on the gun tube, the laser beam that sends in test process imaging respectively on front target and back target; The front target ccd video camera is installed in preceding target surface rear, back target ccd video camera is installed in target surface rear, back, camera lens is all towards the direction of target surface, install with a fixed angle of altitude, guarantee that target surface is full of the field range of area array camera, in test process, respectively front target and the hot spot on the target of back are taken in real time, and be transferred in the data collecting card by data wire; Data collecting card is installed in the observing and controlling computer, and the image transitions that ccd video camera is taken is that data signal is input in the observing and controlling computer and handles; The synchronous exposure of two ccd video cameras of observing and controlling computer control, and with camera acquisition to image handle the physical location that obtains hot spot on the target surface, finally calculate test result and showing in real time; The target surface stand is used to support front target and back target, wherein preceding target surface is fixed on the front support frame, before controlling by servomotor, transverse and longitudinal guide rail and ball-screw, auxiliary moving device moves up and down about target surface, back target surface is fixed on the support of back, auxiliary moving device is controlled about the target surface of back by servomotor, transverse and longitudinal guide rail and ball-screw and is moved up and down, to adapt to the test request of different angles and tracking accuracy.Simultaneously, the distance between front and back support has fixing point to regulate.
Beneficial effect:
(1) method of testing of the present invention is subtracted each other by the actual coordinate of hot spot on two targets of the parallel placement in front and back, can eliminate the gun tube translational movement, can eliminate the angle measurement error that big gun body translational movement causes;
(2) target surface can be followed the tracks of laser facula by auxiliary moving device and moves up and down before and after the method for testing of the present invention, has increased cannon dynamic stability accuracy test scope, has also realized the tracking accuracy test of self-propelled gun simultaneously;
(3) testing arrangement adjustment of the present invention and simple to operate, be easy to install; Testing arrangement is with low cost.
Description of drawings
A kind of self-propelled gun of Fig. 1 specific embodiment of the invention is followed the tracks of lasting accuracy testing arrangement schematic diagram;
The hot spot Coordinate Conversion schematic diagram of Fig. 2 specific embodiment of the invention;
A kind of self-propelled gun of Fig. 3 specific embodiment of the invention is followed the tracks of lasting accuracy test basic principle figure;
A kind of self-propelled gun tracking accuracy of Fig. 4 specific embodiment of the invention dynamic test schematic diagram;
Wherein: target ccd video camera, 10-control module behind target surface, the 9-behind target surface stand and auxiliary moving device, the 8-behind target surface, 6-front target ccd video camera, the 7-before target surface stand and auxiliary moving device, the 5-before the 1-multifreedom motion simulator, the tested big gun body of 2-, 3-laser instrument, 4-.
The specific embodiment
For objects and advantages of the present invention are described better, further specify below in conjunction with accompanying drawing and self-propelled gun tracking lasting accuracy test case.
Embodiment 1:
Following the tracks of the lasting accuracy method of testing between the disclosed a kind of self-propelled gun of present embodiment is advanced is:
Step 1 starts test and carries out the measurement of cannon initial position.
Testedbig gun body 2 is placed on the multifreedom motion simulator 1, be parallel tolaser instrument 3 of firepower line fixed installation on the gun tube, the laser beam that sends can form hot spot respectively on precedingtarget surface 5 andback target surface 6, cannon transfers big gun after orientation and a certain angle of pitching,target surface 5 andback target surface 6 move before the control, and the light beam that laser instrument is sent passes through former and later two target surfaces.Obtain the image coordinate of hot spot on two target surfaces by the image processing, and be converted to the actual coordinate on target surface, thereby obtain the initial position of gun tube.
Step 2 after measuring through the initial position of step 1, is carried out the dynamic stability accuracy test.
Start multifreedom motion simulator 1, fixed armament gun tube angle is motionless, gather the light spot image of front and back target surface in real time and handle the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, actual coordinate by hot spot on two targets of the parallel placement in front and back subtracts each other, can eliminate the gun tube translational movement, obtain the cannon gun tube be engraved at this moment orientation and pitching to angle, with last one constantly the angle of gun tube compare can obtain cannon when a certain angle pitching to the orientation to the angular deflection amount, when multifreedom motion simulator 1 during, in the certain hour section, can count the dynamic stability precision of self-propelled gun according to different regular movement.
Step 3, the test of self-propelled gun tracking accuracy.
Set the self-propelled gun fire control system by the fixed curve motion, start multifreedom motion simulator 1 simultaneously, self-propelled gun gun tube setting in motion, the front and back target surface is followed the tracks of laser facula and is moved, gather the light spot image of front and back target surface in real time and handle the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, with the set-point of current time compare can obtain self-propelled gun in pitching and orientation to departure, through counting the performance indications such as tracking accuracy of tested self-propelled gun after a while.Becausetarget surface 5 andback target surface 6 can move in real time before in this method of testing, realized a self-propelled gun tracking accuracy test of advancing.
Test macro of the present invention is made up of tested antiaircraft gun and testing arrangement.The testing arrangement of making according to method of testing of the present invention as shown in Figure 1, testedbig gun body 2 is installed on the multifreedom motion simulator 1, multifreedom motion simulator 1 is used for simulating the operating mode of self-propelled gun in marching fire;Laser instrument 3 and barrel axis secured in parallel are on gun tube, and the laser beam that is sent in the test process is distinguished imaging on precedingtarget surface 5 andback target surface 8; Target surface is rectangle before and after in the testing arrangement, and wherein front target breadth size is 600 * 500 (mm2), back target breadth is 1000 * 800 (mm2).The circular reference point that 8 black are arranged respectively on the mid point of 4 angles of two target surfaces and four edges.Distance is 1.5m between two targets, and the distance of front target identity distance gun muzzle is 2m.Two target surfaces are separately fixed on the rigid support 4 and 7 of front and back, and control the translation and the lifting of target surface by auxiliary moving device wherein.Front and back target surface battle arrayccd video camera 6 and 9 is installed in the rear of front andback target surface 5 and 8 respectively with a fixed angle of altitude, wherein front target ccd video camera resolution ratio is 659 * 494 pixels, and capture rate was 100 frame/seconds, and lens focus is 8mm, is 60cm to the front target distance; Back target ccd video camera resolution ratio is 1024 * 768 pixels, and capture rate also was 100 frame/seconds, and lens focus is 6mm, is 50cm to the front target distance; Its data-interface mode is the high speed communication interface; The image of gathering is real-time transmitted in the observing and controllingcomputer 10 to be handled.
The groundwork flow process of following the tracks of the lasting accuracy testing arrangement between a kind of self-propelled gun of the present invention is advanced is as follows:
Step 1 starts test and carries out the measurement of cannon initial position.
Cannon accent big gun is controlled the laser instrument of opening on thegun tube 3 by wireless module behind a certain orientation and luffing angle,target surface 5 and 8 moves before and after the control, and the light beam thatlaser instrument 3 is sent passes through the center of former and later twotarget surfaces 5 and 8.Obtain the image coordinate of hot spot on two target surfaces by the image processing, and be converted to the actual coordinate on target surface, thereby obtain the initial position of gun tube.
Becausearea array camera 6 and 9places target surface 5 and 8 rears with a fixed angle of altitude, the image space of calibration point on the front andback target surface 5 and 8 (shown in Fig. 3 a) is not desirable rectangle, but trapezoidal, shown in Fig. 3 b.The computational methods that the image coordinate of hot spot is converted to actual coordinate in the image are as shown in Figure 3: by known reference point, can calculate level to mid point as the auxiliary reference point, connect each mid point, image is divided into 4 zones, shown in Fig. 3 b, and judge hot spot is in which zone of target surface; Secondly,, calculate four summits of hot spot region and the mid point of four edges, shown in Fig. 3 c, calculate this regional centre coordinate again by former 6 calibration points and 2 auxiliary reference points totally 8 points; So carry out interative computation, the center of final area and shell coordinate differ less than certain threshold value or finish during greater than a certain iterations.With the centre coordinate of final area actual coordinate, thereby can calculate the physical location of hot spot on target surface, shown in Fig. 3 d as shell.
Step 2 after measuring through the initial position of step 1, is carried out the dynamic stability accuracy test.
Start multifreedom motion simulator 1, fixed armament gun tube angle is motionless, gather the light spot image of front andback target surface 5 and 8 in real time and handle the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, obtain the cannon gun tube be engraved at this moment orientation and pitching to angle, according to the principle among Fig. 3 and last constantly the angle of gun tube compare can obtain cannon when a certain angle pitching to the orientation to the angular deflection amount, the dynamic stability precision that can count tested self-propelled gun in the certain hour section comprises performance indications such as the degree of accuracy and closeness.
The key of this method of testing is exactly that actual coordinate by hot spot on two targets of the parallel placement in front and back subtracts each other, and can eliminate the gun tube translational movement, thereby obtain self-propelled gun practical stability precision.With the vertical direction be its principle of example as shown in Figure 4:
Wherein, h1Be the distance of front target datum line to target surface stand bottom, h2Be the distance of back target datum line to target surface stand bottom.O is laser instrument position on the initial time gun tube, and α is the angle on the self-propelled gun initial time vertical direction, y11By the laser beam of position o on preceding target surface the one-tenth hot spot to the vertical range of front target datum line, y21By arrive the vertical range of back target datum line at the laser beam of position o institute's one-tenths hot spot on the target surface of back; O ' is a certain moment laser instrument position in the self-propelled gun motion process, and α ' is the angle on this moment vertical direction of self-propelled gun, y12By the laser beam of position o ' on preceding target surface the one-tenth hot spot to the vertical range of front target datum line, y22By arrive the vertical range of back target datum line at the laser beam of position o ' institute's one-tenths hot spot on the target of back; D is the horizontal range between the target surface of front and back.Therefore can draw self-propelled gun gun tube actual deflection angle in vertical direction between position o and o ': Δ α=α '-α.
In like manner can get the deflection angle of horizontal direction.In test process, y11, y21, y12And y22Can obtain h by calculating the physical location of hot spot on target surface1, h2Obtain by actual measurement with d,
Step 3, the test of self-propelled gun tracking accuracy.
Set the self-propelled gun fire control system by the fixed curve motion, start multifreedom motion simulator 1 simultaneously, self-propelled gun gun tube setting in motion, front andback target surface 5 and 8 is followed the tracks of laser faculas and is moved, light spot image before and after gathering in real time in thetarget surface 5 and 8 is also handled the image coordinate that obtains hot spot, be converted to the actual coordinate on target surface, with the set-point of current time compare can obtain self-propelled gun in pitching and orientation to departure, through counting the performance indications such as tracking accuracy of tested self-propelled gun after a while.
The tracking accuracy computational methods of self-propelled gun are as shown in Figure 4: suppose the given gun fire control system of current time orientation and pitching to angle be respectively αHAnd αV, precedingtarget surface 5 moves to apart from the distance of right frame of front target stand and lower frame with gun tube and is respectively dHfAnd dVf,back target surface 8 moves to apart from the distance of right frame of back target stand and lower frame and is respectively dHbAnd dVb, can record in real time by corresponding displacement transducer.The current time hot spot is respectively (x at the coordinate of front andback target surface 5 and 81f, y1f), (x1b, y1b), then the angular deviation of current time self-propelled gun gun tube is
Described the specific embodiment of the present invention though combine accompanying drawing, to those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some distortion and improvement, these also should be considered as belonging to protection scope of the present invention.