CN110657823A - An indoor image-type vertical collimator calibration device - Google Patents

Abstract

The invention discloses an indoor image type plummet calibrating device, which comprises an image processing system and a working base, wherein the working base is provided with a working platform, the working platform is provided with a supporting frame, the supporting frame is fixedly provided with a two-dimensional inclined platform for bearing the plummet to be calibrated, a supporting arm which is integrally formed with the base is arranged beside the working platform, the supporting arm is fixedly connected with a collimator tube which is arranged along the vertical direction, the objective end of the collimator tube is downwards aligned with the upward plumb line position sent by the plummet to be calibrated, the collimator tube is provided with a first image shooting device, the first image shooting device is used for shooting images of a reticle of the collimator tube and images on the reticle, and the first image shooting device is in signal connection with the image processing system; therefore, the indoor image type plummet collimator calibration device is convenient to operate and use, high in calibration speed and high in accuracy and meets the standard requirement.

Description

An indoor image-type vertical collimator calibration device

technical field

The invention belongs to the technical field of instrument detection and calibration, in particular to an indoor image-type vertical collimator calibration device.

Background technique

The vertical collimator is based on the gravity line, and uses the visible light or laser coincident with the collimation axis to generate an upward and downward plumb line, which is used to measure the slight horizontal deviation relative to the plumb line and to position the plumb line, Metrology instrument for measuring the vertical profile of an object. Commonly used collimators include optical collimators, optical collimators with lasers, laser collimators and laser automatic collimators. It is widely used in the construction of high-rise buildings, towers and chimneys, the installation of launch traps, racks and large-scale cylindrical mechanical equipment, elevator detection, horizontal displacement measurement of dams, engineering supervision and deformation observation and other occasions. Military development provides a strong guarantee. In recent years, with the rapid development of the national economy, the demand for collimators is increasing, and the accuracy requirements for collimators are also getting higher and higher. The collimators need to be calibrated and adjusted during delivery and use Otherwise, the use of an inaccurate or damaged collimator will cause huge safety hazards in construction projects. For this reason, in 2002, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued JJF1081-2002 "Vertical Calibration Specification", which is guaranteed by calibration. The measurement performance accuracy of the vertical collimator provides a reliable standard for construction.

JJF1081-2002 "Calibration Specification for Vertical Collimator" stipulates the technical requirements for parameters such as the coaxiality of the vertical axis and the collimation axis of the telescope, the deviation of the vertical alignment measurement for one measurement round, and explains the calibration method of the technical indicators of the vertical collimator. It is pointed out that the standard deviation of the one-round vertical alignment measurement of the optical vertical collimator and the optical vertical collimator with laser is calibrated according to the indoor method, and can be calibrated by a similar theodolite level verification device. The one-round vertical alignment measurement of the laser vertical collimator The standard deviation is calibrated according to the outdoor method, but the following problems exist when using the outdoor method to calibrate the laser vertical collimator: (1) The calibration of the laser vertical collimator is carried out on an outdoor site greater than 40 m, and there are air disturbances, air pollution, Environmental factors such as mechanical vibration have a great impact on the stability of the laser; (2) The outdoor working environment also puts forward higher requirements for the measurement personnel to accurately and stably arrange and erect the measurement equipment, and more than two calibrations are required. (3) The calibration data needs to be manually estimated and read by the calibration personnel on the Cartesian coordinate board with a larger index value.

Chinese patent, the publication number is CN104949689A, the name is the digital calibration method and device of laser collimator based on source imaging, the invention discloses a digital calibration method and device of laser collimator based on source imaging, using a reticle as the projection Entity, image the reticle by adding an imaging light source, so that the image of the reticle is projected on the target at infinity, simulating the projection state at infinity, and compare and calibrate with the debugging reference center on the target. The offset state at infinity adjusts the reticle. Compared with the device in the prior art that projects the debugging reference center at infinity to the reticle, the calibration accuracy is higher, but it cannot meet the laser vertical requirements. It meets the requirements of the calibrator's indoor one-measurement vertical quasi-measurement standard.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the current collimator calibration method and the difficulties in practical operation, the purpose of the present invention is to provide an indoor image-type collimator calibration device, which is easy to operate and use, has high calibration speed and accuracy, and greatly improves the The calibration efficiency of the vertical collimator reduces the calibration work intensity, meets the requirements of the development of measurement technology, and has high practical value and broad market prospects; the technical solutions adopted to achieve the above goals are:

An indoor image-type vertical collimator calibration device, comprising an image processing system and a work base, a work platform is arranged on the work base, a support frame is arranged on the work platform, and a support frame is fixed on the support frame for carrying a vertical collimator to be calibrated. The two-dimensional tilting platform of the collimator is provided with a support arm integrally formed with the base beside the working platform, and a parallel light pipe arranged in the vertical direction is fixedly connected to the support arm, and the objective lens end of the parallel light pipe faces downward. The position of the upward plumb line emitted by the vertical collimator to be calibrated is aligned, and a first image pickup device is installed on the collimator, and the first image pickup device is used for the reticle of the collimator and the imaging on the reticle. For image capturing, the first image capturing device is signally connected to the image processing system.

Preferably, an optical path transmission system is also included. The optical path transmission system includes a red laser target plate, an adjustable mirror assembly, and a plurality of steering mirror assemblies. The two-dimensional inclined platform and the support frame are correspondingly provided with light perforations. It is used to pass the downward plumb line issued by the vertical collimator to be calibrated, and the adjustable mirror assembly is fixed on the working platform just below the light perforation.

Preferably, a light receiving mechanism is fixed on the working platform or the support frame, the light receiving mechanism includes an adjustable two-dimensional base, and a transparent laser target plate and a second image capturing device are fixed on the adjustable two-dimensional base, Wherein, the second image capturing device is used for image capturing for imaging the transparent laser target plate, and the second image capturing device is signally connected with the image processing system.

Preferably, the adjustable reflector assembly includes a height-adjustable reflector support frame, the reflector support frame is fixed on a working platform directly below the light perforation, and a reflector with adjustable inclination is provided on the reflector support frame A mirror support, an adjustable reflecting lens is fixed in the reflector support.

Preferably, the steering mirror assembly includes a movable support column, and a tilt adjustment mechanism is provided on the top of the movable support column, and the tilt adjustment mechanism includes a support base, a support plate is hinged on the support base, and a steering plate is fixed on the support plate The reflective lens and the thread are connected with an adjusting screw, wherein the adjusting screw passes through the support plate and the bottom end of the adjusting screw abuts on the support base.

Preferably, the steering mirror assembly includes a movable support column, a three-dimensional adjustment mechanism is provided on the top of the movable support column, the tilt adjustment mechanism is fixed on the top working platform of the three-dimensional adjustment mechanism, and the steering mirror is fixed on the tilt adjustment mechanism on the support plate of the mechanism.

Preferably, the three-dimensional adjustment mechanism includes a scissor lift frame, an X-direction slide rail is provided on the top plate of the scissor lift frame, a slide plate is slidably connected to the X-direction slide rail, and a slide plate is provided between the bottom of the slide plate and the top plate. There is an X-direction screw nut transmission mechanism for driving the sliding plate to slide along the X-direction; a Y-direction slide rail is arranged on the top of the sliding plate, and a top working platform is slidably connected to the Y-direction slide rail, and the bottom of the top working platform is connected with the sliding plate. There is a Y-direction screw nut transmission mechanism for driving the top working platform to slide along the Y-direction.

Preferably, the size of the adjustable reflective sheet is smaller than the size of the turning reflective sheet.

The beneficial effects of the invention are as follows: the invention realizes the rapid indoor automatic calibration of the vertical collimator to be calibrated, such as the upward plumb line, through the cooperative use of the two-dimensional inclined platform, the collimator light pipe and the first image capturing device, The calibration efficiency is improved; at the same time, through the cooperation of the two-dimensional tilting platform, the adjustable mirror assembly, multiple steering mirror assemblies and the light receiving mechanism, the rapid calibration of the vertical collimator to be calibrated such as the downward plumb line is realized. In-room automated calibration.

The special software for data acquisition and processing equipped with this calibration device can realize the real-time measurement and display of the spot center position of the laser image of the laser collimator, avoid manually moving the grating displacement device to determine the spot position, and automatically store the calibration data and output the original record report. The test table and calculation method of the eight parameters of the vertical collimator are given, which meet the requirements of the JJF1081-2002 vertical collimator calibration specification. The items that can be calibrated by this device are as follows: (1) A standard deviation of the vertical calibration measurement (2) Perpendicularity between the tubular level and the vertical axis (3) Coaxiality between the optical plummet and the vertical axis (4) Coaxiality between the vertical axis and the collimating axis of the telescope (or the laser optical axis) (5) The optical axis of the laser and the telescope The coaxiality of the collimation axis (6) the compensation error of the automatic leveling compensator (7) the automatic placement error of the automatic leveling compensator, so as to realize an indoor environment with convenient operation, calibration speed and high accuracy that meets the requirements of the specification Image type plummet calibration device.

Description of drawings

Fig. 1 is the structural representation of the present invention;

2 is a schematic structural diagram of an adjustable mirror assembly;

3 is a schematic structural diagram of a tilt adjustment mechanism;

Fig. 4 is the right side view of Fig. 3;

5 is a schematic structural diagram of a three-dimensional adjustment mechanism;

Fig. 6 is the left side view of Fig. 5;

7 is a schematic structural diagram of a two-dimensional inclined platform;

Fig. 8 is the right side view of Fig. 7;

FIG. 9 is a plan view of FIG. 8 .

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings.

As shown in FIG. 1, an indoor image-type vertical collimator calibration device includes an image processing system 13 and a work base 3, a work platform 3.1 is provided on the work base 3, and a support frame 5 is provided on the work platform 3.1 , a two-dimensional tilting platform 9 for carrying the vertical collimator 10 to be calibrated is fixed on the supporting frame 5, a supporting arm 3.2 integrally formed with the base 3 is arranged beside the working platform 3.1, and a supporting arm 3.2 is fixedly connected with The collimator 11 is arranged in the vertical direction, and the objective lens end of the collimator 11 is downwardly aligned with the position of the upward plumb line emitted by the collimator 10 to be calibrated, and a first image capturing device 12 is installed on the collimator 11 , the first image capturing device 12 is used for capturing images on the reticle of the collimator 11 and the imaging on the reticle, and the first image capturing device 12 is connected with the image processing system 13 by signal.

Further, in order to realize the calibration of the vertical collimator 10 of the downward plumb line type, an optical path transmission system is also included, and the optical path transmission system includes a red laser target plate (not shown in the figure), an adjustable mirror assembly 4, a plurality of Turning to the mirror assembly 1, the two-dimensional inclined platform 9 and the support frame 5 are correspondingly provided with light perforations 9.16. The light perforations 9.16 are used for the downward vertical laser line emitted by the vertical collimator 10 to be calibrated, and the adjustable mirror assembly 4 is fixed on the working platform 3.1 directly below the light perforation 9.16.

The downward vertical laser line emitted by the vertical collimator 10 to be calibrated passes through the adjustable mirror assembly 4 and the multiple steering mirror assemblies 1 in turn, and after the optical path length reaches the requirement, it needs to be received and offset calculation processing is performed. A light receiving mechanism is fixed on the platform 3.1 or the supporting frame 5, and the light receiving mechanism includes an adjustable two-dimensional base 6 on which a transparent laser target plate 7 and a second image capturing device 8 are fixed. , wherein the second image capturing device 8 is used to image the transparent laser target plate 7 for image capturing, and the second image capturing device 8 is signal-connected to the image processing system 13. Of course, the reflected light can also be received by the red laser target plate. Do a manual read of the offset.

As shown in FIG. 2 , the adjustable mirror assembly 4 includes a height-adjustable mirror support frame 4.1. The mirror support frame 4.1 is fixed on the working platform 3.1 directly below the light perforation 9.16. A reflector support 4.2 with adjustable inclination is arranged on the reflector support 4.2, and an adjustable reflector lens 4.3 is fixed in the reflector support 4.2.

As shown in Fig. 1, Fig. 3 and Fig. 4, the steering mirror assembly 1 includes a movable support column 1.2, and a tilt adjustment mechanism 1.1 is arranged on the top of the movable support column 1.2, and the tilt adjustment mechanism 1.1 includes a support base 1.1.3 , a support plate 1.1.2 is hinged on the support base 1.1.3, a steering mirror 1.1.4 is fixed on the support plate 1.1.2, and an adjusting screw 1.1.1 is threadedly connected, wherein the adjusting screw 1.1.1 passes through the support The plate 1.1.2 and the bottom end of the adjusting screw 1.1.1 abut on the support base 1.1.3, so rotating the adjusting screw 1.1.1 can drive the steering mirror 1.1.4 to tilt and swing in the front-rear direction.

As shown in Figure 1, Figure 3 to Figure 6, the steering mirror assembly 1 includes a movable support column 1.3, and a three-dimensional adjustment mechanism 2 is arranged on the top of the movable support column 1.3, and the tilt adjustment mechanism 1.1 is fixed on the three-dimensional adjustment mechanism 2. On the top working platform 2.3, the steering mirror 1.1.4 is fixed on the support plate 1.1.2 of the tilt adjustment mechanism 1.1.

The three-dimensional adjustment mechanism 2 includes a scissor lift frame 2.7, an X-direction slide rail 2.4 is provided on the top plate 2.8 of the scissor lift frame 2.7, and a slide plate 2.5 is slidably connected to the X-direction slide rail 2.4. 2.5 An X-direction screw nut transmission mechanism 2.6 is arranged between the bottom and the top plate 2.8 for driving the sliding plate 2.5 to slide along the X-direction; a Y-direction slide rail 2.9 is provided on the top of the sliding plate 2.5, which is slidably connected on the Y-direction slide rail 2.9 There is a top working platform 2.3, between the bottom of the top working platform 2.3 and the sliding plate 2.5 there is a Y-direction screw nut transmission mechanism 2.2 for driving the top working platform 2.3 to slide along the Y-direction.

Among them, the scissor lift frame 2.7 is provided with a scissors bracket at the base, the bottom of one branch of the scissors bracket is hinged with the base of the scissor lift frame 2.7, and the bottom of the other branch is slidably connected with the base of the scissor lift frame 2.7, on the top plate 2.8 A Z-direction lead screw nut transmission mechanism 2.1 is arranged at the bottom, and a connecting arm for connecting the screw of the Z-direction lead screw nut transmission mechanism 2.1 is arranged at the bottom of the top plate 2.8, and the screw of the Z-direction lead screw nut transmission mechanism 2.1 is rotatably connected with the connecting arm, And the top of one of the branches of the scissors bracket is threadedly connected with the screw of the Z-direction screw nut transmission mechanism 2.1, so that when the screw of the Z-direction screw nut transmission mechanism 2.1 is rotated, the two branches of the scissors bracket are closed and opened to lift and lower. action.

When the light propagates, the position of the adjustable reflective lens 4.3 and the vertical collimator 10 to be calibrated is relatively fixed, and the problem of receiving light mainly lies in the fine-tuning of the inclination angle of the adjustable reflective lens 4.3, so the size of the adjustable reflective lens 4.3 has no However, the turning mirror 1.14 needs to move back and forth in the process of adjusting the light path to adjust the proper light path, so the size of the turning mirror 1.14 is larger than that of the adjustable mirror 4.3.

In this specific embodiment, the two-dimensional tilting platform 9 can use a high-precision two-dimensional inclinometer in the prior art, or can be specially designed. As shown in FIG. 7 to FIG. 9 , a two-dimensional tilting platform 9 is provided, Including a support base 9.7, on the support base 9.7 is hinged a middle connecting plate 9.8 that is slightly lifted and rotated in the left and right directions, and a top support plate 9.9 that is slightly lifted and rotated in the front and rear directions is hinged on the middle connecting plate 9.8. 9.9. The center connecting plate 9.8 and the supporting seat 9.7 are provided with light perforations 9.16; the supporting seat 9.7 is provided with a lower connecting plate 9.5, the middle connecting plate 9.8 is provided with a middle connecting plate 9.6, and the middle connecting plate 9.6 is arranged on the middle connecting plate 9.6. A helical micrometer mechanism 9.1 with the same working principle as the helical micrometer is installed. The differential cylinder of the helical micrometer mechanism 9.1 is rotatably connected to the middle connecting plate 9.6 through the first bearing 9.2, and the micrometer rod 9.4 of the helical micrometer mechanism 9.1 passes through. The second bearing 9.3 is rotatably connected with the lower connecting plate 9.5, so that when the micrometer rod 9.4 is rotated, the middle connecting plate 9.6 is pushed along the left and right directions to rotate slightly to form a standard inclination angle while the micrometer rod 9.4 is rotated; There is another middle connecting plate 9.14, on the top support plate 9.9 is installed a spiral micrometer mechanism 9.10 with the same working principle as the spiral micrometer. Rotating connection, the micrometer rod 9.13 of the helical micrometer mechanism 9.10 is rotatably connected to the middle connecting plate 9.8 through the fourth bearing 9.12, so that when the micrometer cylinder is rotated, the micrometer rod 9.13 rotates and pushes the top support plate 9.9 along the front and rear directions. The micro-rotation forms a standard inclination angle; the working principle of the spiral micrometer is the same as that of the spiral micrometer, and the accuracy can reach 0.01 mm, and the conversion into the inclination angle can reach the second level, so the accuracy is relatively high.

When the present invention is used, (1) when calibrating the vertical collimator 10 to be calibrated, which emits an upward plumb line, first level the top support plate 9.9 of the two-dimensional inclined platform 9 to zero, and then calibrate the vertical alignment The instrument 10 is placed on the top support plate 9.9, and the vertical alignment instrument 10 to be calibrated is adjusted for leveling, and the upward plumb line emitted enters the collimator 11 and hits the reticle for the collimator 11, and then adjusts the two-dimensional tilt The platform 9 forms a two-dimensional inclination angle with high accuracy that meets the requirements of the specification, and then the calibration vertical collimator 10 is adjusted back. The image information is transmitted to the image processing system 13 for software processing, thereby obtaining calibration parameters.

(2) When calibrating the vertical collimator 10 to be calibrated that emits a downward plumb line, first level the top support plate 9.9 of the two-dimensional inclined platform 9 to zero, and then place the calibration collimator 10 on the top. On the support plate 9.9, the leveling adjustment of the vertical collimator 10 to be calibrated is carried out, and the downward plumb line emitted vertically and downwardly propagates downward and is reflected by the adjustable mirror assembly 4, and then passes through the back and forth reflection effect of the multiple steering mirror assemblies 1. Thereby extending the optical path, and finally entering the red laser target plate to manually read the variation of the deviation, or entering the transparent laser target plate 7 to capture the image of the transparent laser target plate 7 in real time through the second image capturing device 8, and capture the image information. It is transmitted to the image processing system 13 for software processing, and then the two-dimensional tilt platform 9 is adjusted to form a two-dimensional tilt angle with high accuracy that meets the requirements of the specification, and the calibration vertical collimator 10 is adjusted back to obtain the calibration parameters.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced, but these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. an indoor image type vertical collimator calibration device is characterized in that, comprises image processing system and working base, is provided with working platform on working base, is provided with support frame on working platform, is fixed on support frame There is a two-dimensional inclined platform for carrying the vertical collimator to be calibrated, a support arm integrally formed with the base is arranged beside the working platform, and a parallel light pipe arranged in the vertical direction is fixedly connected to the support arm. The end of the objective lens is aimed downward at the position of the upward plumb line emitted by the vertical collimator to be calibrated, and a first image capturing device is installed on the collimator, and the first image capturing device is used for the reticle and the dividing plate of the collimator. The imaging on the scribing board performs image capturing, and the first image capturing device is signally connected to the image processing system. 2 . The indoor image-type vertical collimator calibration device according to claim 1 , further comprising an optical path transmission system, the optical path transmission system comprising a red laser target plate, an adjustable mirror assembly, and a plurality of turning mirrors. 3 . Component, there are corresponding light perforations on the two-dimensional inclined platform and support frame. The light perforations are used to pass the downward plumb line emitted by the vertical collimator to be calibrated. The adjustable mirror assembly is fixed on the working platform directly below the light perforations. . 3 . The indoor image-type vertical collimator calibration device according to claim 2 , wherein a light receiving mechanism is fixed on the working platform or the support frame, and the light receiving mechanism comprises an adjustable two-dimensional base. A transparent laser target plate and a second image capturing device are fixed on the two-dimensional base, wherein the second image capturing device is used to image the transparent laser target plate for image capturing, and the second image capturing device is signally connected to the image processing system. 4 . The indoor image-type vertical collimator calibration device according to claim 2 , wherein the adjustable mirror assembly comprises a height-adjustable mirror support frame, and the mirror support frame is fixed on the front of the light perforation. 5 . On the lower working platform, a reflector support with adjustable inclination is arranged on the reflector support frame, and an adjustable reflector is fixed in the reflector support. 5 . The indoor image-type vertical collimator calibration device according to claim 4 , wherein the steering mirror assembly comprises a movable support column, and a tilt adjustment mechanism is provided on the top of the movable support column, and the tilt adjustment mechanism includes: 6 . The support base is hinged with a support plate on which a steering mirror is fixed and an adjustment screw is threadedly connected, wherein the adjustment screw passes through the support plate and the bottom end of the adjustment screw abuts on the support base. 6 . The indoor image-type vertical collimator calibration device according to claim 5 , wherein the steering mirror assembly comprises a movable support column, a three-dimensional adjustment mechanism is provided on the top of the movable support column, and the tilt adjustment mechanism is fixed. 7 . On the top working platform of the three-dimensional adjustment mechanism, the steering mirror is fixed on the support plate of the tilt adjustment mechanism. 7 . The indoor image-type vertical collimator calibration device according to claim 6 , wherein the three-dimensional adjustment mechanism comprises a scissor lift frame, and an X-direction slide rail is provided on the top plate of the scissor lift frame. A sliding plate is slidably connected to the sliding rail, and between the bottom of the sliding plate and the top plate, there is an X-direction screw nut transmission mechanism for driving the sliding plate to slide along the X-direction; A top working platform is slidably connected to the sliding rail, and a Y-direction lead screw nut transmission mechanism for driving the top working platform to slide along the Y direction is arranged between the bottom of the top working platform and the sliding plate. 8. The indoor image-type vertical collimator calibration device according to any one of claims 5 to 7, wherein the size of the adjustable reflecting lens is smaller than the size of the turning reflecting lens.

Images