CN203084272U - High-precision leveling device for ridge of right-angle reflecting prism - Google Patents

Abstract

The utility model proposes a right-angle reflective prism ridge high-precision leveling device, which includes a right-angle reflective prism group, an adapter plate, a manual screw, a level bubble group, a magnetic table seat and a ferromagnetic base, wherein the right-angle The reflective prism group is composed of a right-angle reflective prism to be leveled and a mounting frame for fixing the right-angle reflective prism; the mounting frame is fixedly connected to the magnetic base through an adapter plate, the adapter plate has a horizontal panel, and the level bubble set Fixedly installed on the upper surface of the horizontal panel, the lower surface of the horizontal panel is connected to the upper surface of the magnetic watch base, the hand-adjusting screw penetrates the horizontal panel and abuts against the upper surface of the magnetic watch base, and the magnetic watch base is fixed to the base by magnetic force.

Description

A high-precision leveling device for right-angle reflective prism ridges

technical field

The utility model relates to a leveling device, which is specifically aimed at the rapid and high-precision leveling operation of the ridge of a right-angle reflection prism. the

Background technique

In the field of precision test and measurement technology, right-angle reflective prisms are usually used as relative rotation angle monitoring components. During the installation process, its ridges are required to be perpendicular to the main axis of rotation. If they are not perpendicular, there is non-perpendicularity of the ridges. In general, the main axis of rotation is the vertical axis of the earth, and the ideal state of the ridge is horizontal. Therefore, the non-perpendicularity of the ridge is also called the non-levelness of the ridge, or the unevenness of the ridge for short. When the unevenness of the ridge is not zero, the relative rotation angle information acquired by the right-angle reflective prism cannot correctly reflect the real rotation angle of the monitored instrument or equipment. the

In order to minimize the measurement error caused by the uneven ridge of the right-angle reflective prism, when designing an instrument or device containing a right-angle reflective prism, the structure is usually more complicated. On the one hand, it needs to be installed or placed with a roughness not higher than 0.8 Mechanical reference plane; on the other hand, the right-angle reflective prism frame in the right-angle reflective prism assembly must have the function of adjusting the direction of the ridge (designing a waist-shaped hole or grinding the mounting base of the frame). In addition, the adjustment of the ridge direction requires a lot of equipment and tools (one autocollimating theodolite, one lifting frame, one large-size flat mirror, one level bubble, hand or grinding platform). the

The traditional solution to detect the unevenness of the ridge of the right-angle reflective prism is to deduce the value of the unevenness of the ridge according to the azimuth angle difference caused by the horizontal and oblique aiming of the right-angle reflective prism with the autocollimation theodolite. The oblique aiming angle is small, and the measurement error is large, and the cost of increasing the oblique aiming angle is that the lifting distance of the autocollimation theodolite is increased, and the width of the right-angle reflecting prism is widened. Comprehensive consideration, the general oblique aiming angle is about 30°. The auto-collimation theodolite needs to be equipped with a special auto-collimation theodolite lifting device in the process of horizontal aiming and oblique aiming at the prism. After the lifting is in place, the auto-collimation theodolite must be re-leveled, which will cause a leveling error, because the azimuth is prone to change. With the help of a plane mirror as the azimuth reference, the total number of self-calibration is at least 4 times. Multiple self-calibration measurements will also produce angle measurement errors, resulting in the accuracy of this measurement method not exceeding 20″. At the same time, it is time-consuming and laborious to rotate the lifting device.

Every time the state of the ridge is monitored, the autocollimating theodolite needs to perform horizontal aiming, oblique aiming at the right-angle reflecting prism, and aiming at the plane mirror twice. For the waist-shaped groove and ground mirror frame base surface installation methods, there are many times of repeated adjustments, and there is a risk of ridge changes caused by vibration during use. At the same time, in order to ensure a large installation contact area, it is often required to allocate a large physical space to the right-angle reflective prism assembly, which cannot be realized for compact instruments or equipment. the

Utility model content

The purpose of this utility model is to propose a right-angle reflective prism ridge high-precision leveling device and its leveling method to solve the problem that the existing technology cannot realize fast and high-precision leveling of the right-angle reflective prism ridge, so that it is impossible to perform instrument or The technical problem of the correct monitoring of the relative rotation angle of the equipment. the

The technical solution of the utility model is:

A right-angle reflective prism ridge high-precision leveling device, including a right-angle reflective prism group, an adapter plate, a hand screw, a level bubble set, a magnetic table seat and a ferromagnetic base, wherein the right-angle reflective prism group is composed of the to-be-adjusted It is composed of a flat right-angle reflecting prism and an installation frame for fixing the right-angle reflection prism; the installation frame is fixedly connected with the magnetic table base through an adapter plate, and the adapter plate has a horizontal panel, and the level bubble group is fixedly installed on the The upper surface of the horizontal panel, the lower surface of the horizontal panel is in contact with the upper surface of the magnetic table base, the manual adjustment screw penetrates the horizontal panel and abuts against the upper surface of the magnetic table base, and the magnetic table base is fixed to the base by magnetic force. the

Based on the above basic scheme, the leveling device is further optimized and improved as follows:

The above-mentioned installation frame body includes a right-angle reflective prism frame, a front pressure plate and a pair of side pressure plates. The right-angle reflective prism frame does not need to have a ridge level adjustment structure, and only meets the spatial shape and size of the right-angle reflective prism, and the right-angle reflective prism is fixed by side pressure and front pressure. the

The above-mentioned vial set includes a vial and an adjusting screw for adjusting the level indication state of the vial. the

The above-mentioned level bubble is a long water bubble, and one-third of the accuracy of the value of the level bubble is less than the difference between the adjustment accuracy of the ridge unevenness of the right-angle reflective prism and the detection accuracy of the ridge unevenness. the

The screw head of the above-mentioned adjusting screw has a through hole for inserting a dial pin. the

There are two hand-adjusting screws, which are arranged at the far end of the right-angle reflective prism group on the horizontal panel. the

The material of the above base is 45 steel. This kind of steel is ferromagnetic and heavy, and it has high stability when placed on the monitored instrument or equipment. The material of the right-angle reflective prism frame, side pressure plate, front pressure plate and adapter plate is 2A12, taking into account the advantages of light weight and high hardness. the

Based on the leveling device described above, the utility model provides a specific leveling method. The method includes the following steps:

1) Use the autocollimation theodolite to detect the ridge roughness value α′ of the right-angle reflective prism, and use the dial tool to rotate the adjustment screw until the difference between the horizontal state α of the vial and the ridge roughness α′ of the right-angle reflective prism satisfies Demand value α ₀ ′, namely Calibration completed;

2) Connect the calibrated right-angle reflective prism ridge high-precision leveling device to the monitored instrument or equipment;

3) Observe the level indication status of the vial. If it is not normal, adjust the hand-adjusting screw by hand until the level state of the vial α is within one-third of the cell value of the vial;

4) At this time, the right-angle reflective prism meets the requirements of the unevenness of the ridge and can monitor the relative rotation angle of the instrument or equipment correctly. the

Step 2 above) When the leveling device is fixedly connected to the monitored instrument or equipment, one method is to place it directly on the monitored instrument or equipment through the base; in another case, if the monitored instrument or equipment is pre-installed If there is an installation plane made of ferromagnetic material, the base of the leveling device can be removed, and it can be adsorbed on the installation plane of the monitored instrument or equipment through its magnetic base. The magnetic attraction force is enough to ensure the firm and stable state of the installation, and at the same time, it does not affect the state of the ridge by turning the hand-adjusting screw. the

The utility model has the following advantages:

With the application of the utility model, the unevenness of the ridges of the right-angle reflecting prism only needs to be measured once, and it is not necessary to adjust to an absolute level. It is only necessary to adjust the level of the vial to be consistent with the unevenness of the ridges of the right-angle reflecting prism. the

The right-angle reflective prism ridge high-precision leveling device uses the principle of magnetic adsorption. The right-angle reflective prism device can be placed or adsorbed on the installation plane of the monitored instrument or equipment very conveniently and quickly. The hand-tightening force is transmitted through the thread, which is convenient. Change the horizontal state of the ridge of the right-angle reflective prism; at the same time, the ingenious structural design of the solid connection between the level bubble group and the right-angle reflective prism group enables the level state of the level bubble to represent the unevenness of the right-angle reflective prism ridge. At present, the level bubble The precision of the grid value is very high, and the high-precision leveling of the ridge can be realized. the

Description of drawings

Fig. 1 is the device schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the principle of the calibration process of the present invention. the

Explanation of reference numerals: 1—leveling device of the present utility model; 2—right angle reflective prism group; 3—right angle reflective prism; 4—prism frame; 5—side pressure plate; 6—front pressure plate; 7—level bubble group; 8 - level bubble; 9 - adjusting screw; 10 - magnetic base; 11 - adapter plate; 12 - manual adjustment screw; 13 - base; 14 - monitored instrument or equipment; 15 - monitored instrument or equipment ferromagnetic Base plane; 16-autocollimator; 17-orthorhombic prism zero state; 18-orthorhombic prism -22.5° state; 19-orthorhombic prism +22.5° state. the

Detailed ways

As shown in Figure 1, in the leveling device of the present utility model, the right-angle reflective prism group 2, the level bubble group 7 and the magnetic table base 10 are fixedly connected together through the adapter plate 11, and the manual adjustment screw 12 is adjusted by hand, and the screw 12 is adjusted by the screw thread. The transmission can change the horizontal state of the ridges of the right-angle reflective prism 3; the adjustment screw 9 can be rotated with a dial needle to change the level indication state of the level bubble 8; the magnetic table 10 has two states of demagnetization and excitation through the switch knob, and the excitation state Next, it can be adsorbed on the ferromagnetic material base 13. the

The fast and high-precision leveling method of the right-angle reflective prism ridge of the present utility model comprises the following steps:

斜方棱镜17在水平面内旋转180°，由状态18 至状态19时，自准直仪16再对直角反射棱镜3进行瞄准，并记录瞄准示值

对三次测量值按照式（1）进行计算，即得到直角反射棱镜3的棱脊不平度值：  1) As shown in Figure 2, in the leveling process of the utility model, the self-collimating theodolite 16 with a single measurement error of 0.2″ is used, and the core component in the ridge unevenness detector is the orthorhombic prism 17. Calibration In the process, the applicant's self-developed ridge roughness detector can be used (see Chinese patent ZL200910020843.7 "A Method and Device for Detecting Plane Plumbity by Right-angle Reflecting Prism Method"). The ridge roughness has high measurement accuracy and can be The control is within 8", and it has the advantages of simple measurement principle and easy operation. The right-angle reflective prism device 1 is placed on the calibration platform through the base 13, and when the orthorhombic prism 17 is in the vertical state, firstly, the auto-collimation theodolite 16 aims at the right-angle reflective prism 3, and records the aiming indication value The orthorhombic prism 17 rotates 22.5° counterclockwise, and when it is in state 18, the light is refracted to the right-angle reflective prism 3, and the autocollimator 16 aims at the right-angle reflective prism 3, and records the aiming value

The rhombic prism 17 rotates 180° in the horizontal plane, and from the state 18 to the state 19, the autocollimator 16 aims at the rectangular reflective prism 3 again, and records the aiming indication value

The three measured values are calculated according to formula (1), that is, the ridge roughness value of the right-angle reflective prism 3 is obtained:

${\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{\frac{{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; 0.463</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

2) The horizontal state of the vial is consistent with the unevenness of the ridge, and the left high and right low are positive. The required value of the unevenness of the ridge is to use the needle to rotate the adjustment screw 9 so that the horizontal state of the vial 9 is within the interval. At this time, the calibration of the right-angle reflective prism device 1 is completed;

3) When in use, place the rectangular prism device 1 directly on the monitored instrument or equipment 14 through the base 13. If the monitored instrument or equipment 14 has an installation plane 15 made of ferromagnetic material, the rectangular prism device 1 The base 13 can be removed, and the magnetic base 10 can be adsorbed on the installation plane 15 of the monitored instrument or equipment 14;

4) Observe the level state indicated by level bubble 8, if it is not flat, adjust the hand screw 12 by hand until the level state of level bubble 8 is within one-third of the value of the level bubble cell, and the relative rotation angle of the instrument or equipment can be adjusted correct monitoring. the

Of course, for the calibration process using the autocollimation theodolite, in addition to the ridge roughness detector described in this embodiment, other detection equipment can also be used to achieve calibration, as long as it has a certain accuracy. the

In the traditional solution, when the right-angle reflective prism is used as a relative rotation angle monitoring component, it is generally used as a solidified component of an instrument or device. Before the monitoring function is realized, complex calibration and detection work must be carried out, and the highest accuracy can only reach 15". However, the high-precision leveling device provided in the utility model has only two error sources, one is the detection accuracy of the calibration measurement equipment , assuming that the single measurement is 8″, and the other is the horizontal state error of the vial. If an ordinary level vial with 20″ accuracy is selected, the reading accuracy of one-third of the grid value can already guarantee the measurement accuracy to 15″; when the edge The ridge unevenness detector takes the average of multiple measurements, and selects a higher-precision level bubble. For example, when a 10" level bubble is used, the leveling accuracy of the ridge can reach within 6". When a 6" level bubble is selected, the leveling accuracy The accuracy will be higher. At the same time, the device has the advantages of simple measurement principle, easy operation and high efficiency. 

Claims (7)

1. right-angle reflecting prism rib ridge high precision levelling device, it is characterized in that: comprise right-angle reflecting prism group, card extender, manual control screw, air level group, Magnetic gauge stand and have ferromagnetic pedestal that wherein the right-angle reflecting prism group is made up of the right-angle reflecting prism for the treatment of leveling and the installation framework that is used for fixing this right-angle reflecting prism; Framework is installed fixedlys connected with Magnetic gauge stand through card extender, card extender has a horizontal panel, described air level group is fixedly installed in this horizontal panel upper surface, this horizontal panel lower surface and Magnetic gauge stand upper surface join, described manual control screw runs through horizontal panel and butt Magnetic gauge stand upper surface, and Magnetic gauge stand is fixed by magnetic force and described pedestal.

2. right-angle reflecting prism rib ridge high precision levelling device according to claim 1, it is characterized in that: described installation framework comprises right-angle reflecting prism frame, front pressuring plate and a pair of side guide; Right-angle reflecting prism frame wherein satisfies the spatial form and the size of right-angle reflecting prism, and the mode of employing side pressure and preceding pressure is right-angle reflecting prism fixedly.

3. right-angle reflecting prism rib ridge high precision levelling device according to claim 1 is characterized in that: the set screw that described air level group comprises air level and is used to regulate the horizontal indicating status of air level.

4. right-angle reflecting prism rib ridge high precision levelling device according to claim 3, it is characterized in that: described air level is long bubble, air level scale value precision 1/3rd less than right-angle reflecting prism rib ridge unevenness degree of regulation and rib ridge unevenness accuracy of detection difference.

5. right-angle reflecting prism rib ridge high precision levelling device according to claim 3 is characterized in that: the screw head of described set screw has the pin of dialling and inserts through hole.

6. right-angle reflecting prism rib ridge high precision levelling device according to claim 1, it is characterized in that: described manual control screw has two, is arranged at the remote location of right-angle reflecting prism group on the horizontal panel.

7. right-angle reflecting prism rib ridge high precision levelling device according to claim 1, it is characterized in that: the material of described pedestal is 45 steel.

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