Laser centering auxiliary device for gyroscopic total station

Abstract

The utility model relates to the field of measuring equipment, in particular to a laser centering auxiliary device for a gyroscopic total station, and aims to solve the problems of low centering precision and complicated operation of the existing centering device for the gyroscopic total station. The utility model provides a laser centering auxiliary device for a gyroscopic total station, which comprises a laser centering device and a fixed base sleeved outside the laser centering device, and the top of the fixed base is fixedly connected with a connecting piece capable of being detachably connected with the gyroscopic total station; the center lines of the laser centering device, the fixed base and the connecting piece are all located on the same straight line, the device adopts a laser centering assisting mode, interference of external factors on a centering result is avoided, rapid and accurate centering operation can be achieved, the centering process is simplified, the centering precision and efficiency are improved, the centering operation difficulty is reduced, and the centering accuracy is improved. And the device has high practicability and is very suitable for popularization.

Description

Technical Field

[0001] The utility model relates to the field of measuring equipment, and particularly relates to a laser centering auxiliary device for a gyro total station. Background Art

[0002] A gyro total station, also known as a gyro theodolite, is a high-precision measuring device and is widely used in azimuth measurement work for large-scale projects such as subways, tunnels, and mines. A gyro total station consists of a gyroscope, a total station, and a tripod. Among them, the gyroscope is the core of the system, and a gyro sensitive part (i.e., a gyro housing) is arranged in the gyroscope.

[0003] When using a gyro total station, operation steps such as centering, leveling, aiming, and reading are required. The purpose of centering is to place the gyro total station so that its center and the marking center of the measuring station (also known as the measuring station marking position) are on the same plumb line. The accuracy of the centering operation directly affects the accuracy of the measurement result.

[0004] GYROMAT 3000 and GYROMAT 5000 are currently gyro total stations with relatively high nominal measurement accuracies. They both adopt the traditional plumb bob centering method. The main steps of plumb bob centering are as follows: ① Open the tripod and place it on the measuring station. The length of the tripod legs should be convenient for observation; ② The tripod head should be approximately horizontal; ③ Take out the instrument from the box and place it on the tripod. Tighten the connecting screw to connect the instrument and the tripod. Carefully observe whether the plumb bob deviates from the marking center of the measuring station. If it deviates, slightly loosen the connecting screw, translate the instrument on the tripod head so that the tip of the plumb bob accurately aligns with the marking center of the measuring station, and then tighten the connecting screw.

[0005] The plumb bob centering method is often affected by many factors. For example, it is easily affected by wind flow under windy conditions due to environmental interference; also, it is highly affected by the operator and is very dependent on the operator's manual operation and experience judgment. Therefore, the existing centering devices for gyro total stations have problems of low centering accuracy and complex operation, which lead to the problem of low measurement accuracy of existing gyro total stations. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the above-mentioned disadvantages of the existing technology and provide a laser centering auxiliary device for a gyro total station with relatively high centering accuracy and relatively simple operation.

[0007] The technical solution of the utility model is as follows: The utility model provides a laser centering auxiliary device for a gyro total station, which includes a laser centering device and a fixed base sleeved outside the laser centering device. A connecting piece capable of being detachably connected to the gyro total station is fixedly connected to the top of the fixed base;

[0008] The center lines of the laser centering device, the fixed base, and the connecting piece are all located on the same straight line.

[0009] As a further improvement of the present utility model, the connecting member is welded to the top of the fixed base.

[0010] As a further improvement of the present utility model, the connecting member is made of stainless steel.

[0011] As a further improvement of the present utility model, the fixed base is a cylindrical structure with a single-sided opening, the fixed base includes a top plate and a side plate, and the connecting member is installed on the top of the top plate.

[0012] As a further improvement of the present utility model, the fixed base is made of stainless steel.

[0013] As a further improvement of the present utility model, the laser alignment device includes a switch for controlling the opening and closing of the laser alignment device and a laser emitting unit capable of emitting a laser beam.

[0014] As a further improvement of the present utility model, the connecting member is detachably installed on the gyro housing of the gyro total station, and the center lines of the connecting member and the gyro housing are located on the same straight line.

[0015] As a further improvement of the present utility model, the connecting member is threadedly connected to the gyro housing.

[0016] As a further improvement of the present utility model, the connecting member is a vertically arranged threaded rod.

[0017] As a further improvement of the present utility model, a threaded central hole is provided at the center of the bottom of the gyro housing, and an internal thread matching the external thread of the threaded rod is provided in the central hole.

[0018] The beneficial effects of the present utility model are as follows: The laser centering auxiliary device for a gyro total station provided by the present utility model has relatively high centering accuracy and is relatively simple to operate. The laser centering auxiliary device for a gyro total station includes a laser centering device and a fixed base sleeved outside the laser centering device. A connecting piece capable of being detachably connected to the gyro total station is fixedly connected to the top of the fixed base. The center lines of the laser centering device, the fixed base, and the connecting piece are all located on the same straight line. After detachably connecting the laser centering auxiliary device for a gyro total station to the gyro total station through the connecting piece, turn on the laser centering device to emit laser light, and observe whether the laser beam deviates from the mark center of the measuring station to perform centering. Even under strong wind conditions, the laser beam will not exhibit the situation of swaying in the wind as a plumb bob does. At the same time, there is usually a certain distance between the tip of the plumb bob and the mark center of the measuring station. Whether it deviates or not mainly depends on the experience and judgment of the operator. Therefore, in actual use, the operation is relatively complex and the requirements for the operator are relatively high. However, it is relatively easy to judge whether the laser beam of this device deviates from the mark center of the measuring station, greatly reducing the operation difficulty. Therefore, this device performs the centering operation of the gyro total station on the ground point through the laser beam, is not affected by the external environment such as wind force, greatly improves the accuracy, and at the same time avoids the shortcoming that the centering operation of the plumb bob depends on manual judgment, reduces the operation difficulty, has good practical value, and the device has a simple and compact structure, can be quickly installed and disassembled, has a low operation difficulty, a low manufacturing cost, and is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is the perspective front view of the present utility model;

[0021] Figure 2 is the top view of the present utility model;

[0022] The names of the components corresponding to the marks in the above drawings are: 1 - connecting piece, 2 - fixed base, 3 - laser centering device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further elaborates on the present utility model in detail through specific embodiments in conjunction with the drawings.

[0024] In the following embodiments, many details are described to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of these features can be omitted in different situations, or can be replaced by other components, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0025] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated that a certain sequence must be followed.

[0026] As used in this application, the terms "connection" and "coupling", unless otherwise specified, both include direct and indirect connection (coupling).

[0027] The definitions of relevant terms involved in this application are as follows:

[0028] (1) Gyro total station: It is an instrument used to measure the true north azimuth angle by integrating a gyroscope and a total station through a connecting mechanism. It utilizes the physical properties of the gyroscope itself (fixed-axis property and precession property), and uses a gyro-sensitive part with a suspended center of gravity shifted downward by a metal strip to sense the horizontal component of the earth's angular velocity of rotation. Under the action of gravity, a torque that precesses northward is generated, causing the main axis of the gyroscope to swing back and forth around the earth's meridian plane, thereby measuring the true north azimuth angle. It has the characteristics of high orientation accuracy and short time, and is widely used in mine surveying, engineering surveying, and military mapping. It is also an important supporting equipment for radar antenna orientation, UAV flight orientation, and the orientation of artillery and long-range weapons. In particular, the undercarriage gyro total station has high automation, short orientation time, and little influence from wind speed, and is widely used in underground engineering through surveying.

[0029] The gyroscope is the core of the gyro total station, mainly composed of a gyro-sensitive part, a gyro-sensitive part locking device, etc.; the total station is the azimuth extraction device of the system, and can also measure the target geographical azimuth angle or coordinate azimuth angle by aiming at the measured target; the tripod provides support for the gyroscope and the theodolite.

[0030] (2) Centering: It is a very basic term in the surveying and mapping discipline and is an operation that any surveyor must first complete when conducting surveys. Centering is to make the center of the instrument and the center of the survey point marker on the same plumb line. Centering is generally divided into plumb bob centering, optical plummet centering, forced centering, and laser centering. The error of the plumb bob centering method is about ±2 mm without the interference of wind and current. It is vulnerable to the influence of wind and current, with relatively low centering accuracy, which affects the orientation accuracy. Especially in underground mines or other places with strong wind speeds, the orientation accuracy is very low; the error of the centering rod centering method is about ±1 mm; the error of the optical plummet centering is about ±0.5 mm.

[0031] As Figure 1 , Figure 2 shown, a laser centering auxiliary device for a gyro total station provided by the present utility model includes a laser centering device 3 and a fixed base 2 made of stainless steel sleeved outside the laser centering device 3. The above-mentioned fixed base 2 is a cylindrical structure with a single-sided opening, and its inner diameter is slightly larger than the outer diameter of the laser centering device 3. The above-mentioned fixed base 2 includes a top plate and a side plate. A connecting member 1 made of stainless steel that can be detachably connected to the gyro total station is fixedly connected to the top of the top plate of the above-mentioned fixed base 2, and the specific connection method is welding. The above-mentioned laser centering device 3 includes a switch for controlling the opening and closing of the laser centering device 3 and a laser emitting unit capable of emitting a laser beam. The connecting member 1 is detachably installed on the gyro housing of the gyro total station. Specifically, the above-mentioned connecting member 1 is a vertically arranged threaded rod, which is threadedly connected to the above-mentioned gyro housing. A threaded central hole is opened at the center of the bottom of the above-mentioned gyro housing, and an internal thread matching the external thread of the above-mentioned threaded rod is provided in the above-mentioned central hole.

[0032] The center lines of the above-mentioned gyro housing, laser centering device 3, fixed base 2, and connecting member 1 are all located on the same straight line.

[0033] The working steps of a laser centering auxiliary device for a gyro total station provided by the present utility model are as follows:

[0034] ① Open the tripod and place it on the survey point. The length of the tripod legs should be convenient for observation;

[0035] ② The head of the tripod should be approximately horizontal;

[0036] ③ Take out the instrument from the box and place it on the tripod. Install the threaded rod of the laser centering auxiliary device for the gyro total station into the central hole of the gyro housing. Then, sleeve the laser centering device 3 into the fixed base 2. Turn on the switch of the laser centering device 3, and the laser emitting unit emits a laser beam. Move the tripod legs to align the laser beam with the center of the survey point marker. At the same time, keep the head of the tripod horizontal, carefully observe whether the laser beam deviates from the center of the survey point marker, and make adjustments.

[0037] As can be seen from the above process, even under windy conditions, the laser beam will not have the problem of the plumb bob swaying with the wind, which affects the measurement accuracy. At the same time, it is judged whether the tip of the plumb bob deviates from the marking center of the measuring station. Because there is a certain distance between the tip of the plumb bob and the marking center of the measuring station, judging whether it deviates depends very much on the experience of the staff. Therefore, errors are very likely to occur. However, the laser beam can be directly projected onto the marking center of the measuring station, and whether it deviates is clearly visible, greatly reducing the operation difficulty of centering.

[0038] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A laser centering auxiliary device for a gyro total station, characterized in that It includes a laser centering device (3) and a fixed base (2) sleeved outside the laser centering device (3). A connecting member (1) capable of being detachably connected to a gyro total station is fixedly connected to the top of the fixed base (2). The center lines of the laser centering device (3), the fixed base (2) and the connecting member (1) are all located on the same straight line.

2. The laser centering auxiliary device for a gyro total station according to claim 1, characterized in that, The connecting member (1) is welded to the top of the fixed base (2).

3. An auxiliary device for laser centering of a gyro total station according to claim 1, characterized in that, The connecting member (1) is made of stainless steel.

4. A laser centering auxiliary device for a gyro total station according to any one of claims 1 to 3, characterized in that, The fixed base (2) is a cylindrical structure with a single-sided opening. The fixed base (2) includes a top plate and a side plate, and the connecting member (1) is installed on the top of the top plate.

5. A laser centering auxiliary device for a gyro total station according to any one of claims 1 to 3, characterized in that, The fixed base (2) is made of stainless steel.

6. A laser centering auxiliary device for a gyro total station according to any one of claims 1 to 3, characterized in that, The laser centering device (3) includes a switch for controlling the opening and closing of the laser centering device (3) and a laser emitting unit capable of emitting a laser beam.

7. A laser centering auxiliary device for a gyro total station according to any one of claims 1 to 3, characterized in that, The connecting member (1) is detachably installed on the gyro housing of the gyro total station, and the center lines of the connecting member (1) and the gyro housing are located on the same straight line.

8. The laser centering auxiliary device for a gyro total station according to claim 7, characterized in that, The connecting member (1) is threadedly connected to the gyro housing.

9. The laser centering auxiliary device for a gyro total station according to claim 7, characterized in that, The connecting member (1) is a vertically arranged threaded rod.

10. A laser centering auxiliary device for a gyro total station according to claim 9, characterized in that, A threaded center hole is provided at the center of the bottom of the gyro housing, and an internal thread matching the external thread of the threaded rod is provided in the center hole.

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