CN113272618A

CN113272618A - Device for measuring distance

Info

Publication number: CN113272618A
Application number: CN202080007664.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: DeepRoute AI Ltd
Current assignee: DeepRoute AI Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-08-17
Anticipated expiration: 2040-05-19
Also published as: WO2021232220A1; CN113272618B

Abstract

A device (lOO) for measuring distance, comprising: a movable mounting platform (110); an X-axis distance measuring device (120) telescopically received in the mounting platform (110); the X-axis distance measuring device (120) comprises a positioning part (121); when the positioning piece (121) extends out of the carrying platform (110) to be fixed at the reference position, the carrying platform (110) moves to the position to be measured along the X axial direction away from the reference position; the Z-axis distance measuring equipment (140) is vertically arranged at the top of the carrying platform (110); and a Y-axis distance measuring device (130) slidably disposed on the Z-axis distance measuring device (140) in a vertical direction; the Y-axis distance measuring device (130) has a contact end (132) such that the contact end (132) is in contact with the location to be measured.

Description

Device for measuring distance

Technical Field

The application relates to the technical field of vehicle detection, in particular to a device for measuring distance.

Background

The automobile body measuring and calibrating means mainly adopt a structured light photography method for scanning or use a three-coordinate measuring machine for measuring and the like, and both require professional equipment and an operator has more skilled professional skills. Currently, the relevant professional equipment available for vehicle body measurement is expensive, such as a handheld 3D scanner, a mobile bridge type measuring device, a column type bridge measuring device, and a large single-pillar mobile measuring device. In particular, the non-multi-axis mechanical arm type measuring device suitable for measuring the vehicle body is large in size, heavy in weight, inconvenient to maintain and difficult to carry. In the case of only partial surface mapping requirements, such as the front, doors, roof, etc. of a vehicle, which only need to be measured, it is not reasonable to maintain and maintain the device for a long period of time. In addition, the measurement steps adopted by the reverse design with low precision requirement of more professional equipment reach overhigh measurement precision.

Disclosure of Invention

An apparatus for measuring distance, comprising:

a movable carrying platform;

the X-axis distance measuring equipment is telescopically accommodated in the carrying platform; the X-axis distance measuring equipment comprises a positioning piece; when the positioning piece extends out of the carrying platform to be fixed at a reference position, the carrying platform moves to a position to be measured along the X axial direction away from the reference position;

the Z-axis distance measuring equipment is vertically arranged at the top of the carrying platform; and

the Y-axis distance measuring equipment is slidably arranged on the Z-axis distance measuring equipment along the vertical direction; the Y-axis distance measuring equipment is provided with a contact end; when the carrying platform moves to the position to be measured, the contact end on the Y-axis distance measuring equipment is adjusted to be in contact with the position to be measured so as to determine the distances of the position to be measured in the X-axis direction, the Y-axis direction and the Z-axis direction relative to the reference position.

Drawings

FIG. 1 is a schematic perspective view of an apparatus for measuring distance in one embodiment;

FIG. 2 is a side view of the apparatus for measuring distance shown in FIG. 1;

FIG. 3 is a schematic perspective view of an apparatus for measuring a distance in another embodiment;

FIG. 4 is a schematic contact diagram illustrating another embodiment of adjusting the position of a positioning element on the Y-axis measuring instrument to contact a position to be measured;

FIG. 5 is a schematic structural diagram of a Z-axis distance measuring device on the distance measuring device of another embodiment, which is arranged on the carrying platform through a turntable;

fig. 6 is a schematic structural diagram of a laser ranging device arranged in three directions on a distance measuring device in another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The existing three-coordinate measuring instrument for testing the automobile body has the defects of large volume, large occupied space, heavy mass and high cost, and is generally fixed. As a large-scale mechanical device, the manufacturing precision is extremely high and the requirement on materials is high due to the requirement of measurement work. Meanwhile, the existing three-coordinate measuring instrument has high maintenance requirements, maintenance processes and maintenance materials, and has high requirements on maintenance personnel. Further, there is a problem of overuse for a high-precision coordinate measuring machine. For example, the measurement range of the high-precision three-coordinate measuring machine covers the whole vehicle and the measurement precision is extremely high. For the measurement condition that the use frequency is low and the measurement requirement on part of the surface structure is low, the measurement range of the high-precision three-coordinate measuring instrument is difficult to avoid the problem of using more degrees. Based on the above problems, the present application provides a device and a method for measuring a distance.

In one embodiment, as shown in fig. 1 and 2, there is provided an apparatus 100 for measuring a distance, comprising: a movable mounting platform 110; the X-axis distance measuring device 120 is telescopically accommodated in the mounting platform 110. The X-axis ranging apparatus 120 includes a positioning member 121. When the positioning member 121 extends out of the mounting platform 110 to be fixed at the reference position, the mounting platform 110 moves away from the reference position to the position to be measured along the X-axis direction. And the Z-axis distance measuring equipment 140 is vertically arranged on the top of the carrying platform 110. And a Y-axis distance measuring device 130 slidably disposed on the Z-axis distance measuring device 140 in a vertical direction. The Y-axis distance measuring device 130 has a contact end 132. When the carrying platform 110 moves to the position to be measured, the contact end 132 of the Y-axis distance measuring device 130 is adjusted so that the contact end 132 contacts the position to be measured, so as to determine the distances of the position to be measured in the X-axis direction, the Y-axis direction and the Z-axis direction, respectively, relative to the reference position.

Specifically, the apparatus 100 for measuring distance provided in this embodiment uses the movable mounting platform 110 moving in the moving direction (X axis) of the movable mounting platform 110 and carrying other devices as a core platform. The Y-axis distance measuring device 130 is drawn by a drawing wire on a bearing part so as to realize that the Y-axis distance measuring device 130 slides up and down along the Z-axis; and the Y-axis distance measuring device 130 is horizontally moved in the Y-axis direction by the driving of the other bearing-portion internal gear. The X-axis distance measuring device 120 is retractably disposed on one side of the movable carrying platform 110, so that when the X-axis distance measuring device 120 is not in use, the X-axis distance measuring device 120 can be retractable and fixed on the movable carrying platform 110, such that the distance measuring apparatus 100 is portable and the storage space occupied by the distance measuring apparatus is reduced.

The distance measuring device 100 provided by the embodiment adopts a pure mechanical structure based on the working principle of the three-coordinate measuring instrument, is designed aiming at the measuring conditions of the automobile body, and has the advantages of simple overall structure, small size and mobility. The distance measuring device 100 only has a plurality of bearing parts, so that the distance measuring device 100 is low in operation difficulty, high in flexibility, low in maintenance cost and convenient to carry on the premise of meeting the measurement requirement.

In one embodiment, as shown in FIG. 3, the X-axis distance measuring device 120 further includes a retractable X-axis gauge 122. The X-axis measuring instrument 122 has an outlet end at which the positioning member 121 is disposed. When the mounting platform 110 moves away from the reference position, the X-axis measuring instrument 122 is stretched along the X-axis direction to measure the distance between the position to be measured and the reference position in the X-axis direction. The Z-axis distance measuring apparatus 140 includes a Z-axis measuring instrument 141 disposed along the Z-axis direction to measure the distance in the Z-axis direction of the position to be measured with respect to the reference position. The Y-axis distance measuring apparatus 130 includes a Y-axis measuring instrument 131 disposed along the Y-axis. The contact end 132 serves as a free end of the Y-axis measuring instrument 131 for measuring a distance in the Y-axis direction of the position to be measured with respect to the reference position. The Y-axis distance measuring device 130 further includes a slider slidably disposed on the Z-axis distance measuring device 140 in a vertical direction. The Y-axis measuring instrument 131 is movably provided on the slider in the Y-axis direction.

Specifically, the X-axis measuring instrument 122 includes an X-axis graduated scale, the X-axis graduated scale is fixed on the carrying platform 110 through a scale frame, and the X-axis graduated scale is coiled and contracted on the scale frame in a coiled shape. The retracted X-axis scale is deployed by stretching of the exit end of the X-axis scale. The positioning member 121 is disposed at an outlet end of the X-axis scale, so that the positioning member 121 can be fixed to a reference position in a measurement environment. Along with the movable carrying platform 110 gradually gets away from the reference position along the X axis, the X axis scale is driven to stretch along the X axis direction, so as to measure the distance of the position to be measured in the X axis direction relative to the reference position.

The Y-axis gauge 131 comprises a detachably attached Y-axis scale. When the Y-axis scale is detached from the Y-axis distance measuring apparatus 130, it is beneficial to reduce the overall occupied space of the distance measuring device, and is convenient for carrying the distance measuring device.

As shown in fig. 4 and 5, the sliding member of the Y-axis distance measuring device 130 can move up and down along the Z-axis distance measuring device 140 by the traction of the traction wire, so that the contact end 132 reaches the height of the position 210 to be measured on the object 200 to be measured. Specifically, the pull wire is coiled in a fixed turntable as a spool, and the head of the pull wire is connected with the Y-axis distance measuring equipment 130. The fixed turntable can be fixed on the top surface of the mobile platform through a bracket. By manually rotating the dial, the pulling wire in the tensile dial is pulled in or out, thereby adjusting the height of the Y-axis distance measuring device 130 above the Z-axis distance measuring device 140.

The sliding member of the Y-axis distance measuring device 130 is driven by the bearing portion inside the sliding member to move back and forth in the horizontal direction, so that the contact end 132 contacts the position 210 to be measured on the object 200 to be measured. The bearing portion may adopt a gear structure to drive the horizontal movement of the Y-axis measuring instrument 131. Considering that the present embodiment satisfies the requirement for portable and simple measurement for the measurement distance, the requirement for the bearing portion is not high, and it is sufficient to satisfy normal rotation. Optionally, the bearing portion is made of an aluminum alloy material.

In one embodiment, as shown in fig. 4 and 5, the Z-axis distance measuring device 140 may be disposed on the top of the mounting platform 110 through a turntable 150 for horizontally rotating the Z-axis distance measuring device 140 relative to the top surface of the mounting platform 110, for example, by 180 degrees. When the position to be measured 210 is located at a side far from the contact end 132 of the Y-axis distance measuring device 130, the turntable 150 rotates 180 degrees on the top of the mounting platform 110 to drive the Z-axis distance measuring device 140 thereon to rotate synchronously, so that the contact end 132 faces the position to be measured 210.

In one embodiment, the Z-axis distance measuring apparatus includes a column having a receiving groove along the Z-axis (extending direction of the column) for receiving the Y-axis measuring instrument. The length of the accommodating groove is greater than or equal to that of the Y-axis measuring instrument.

Specifically, the pillar structure may adopt a four-pillar structure. Optionally, the Z-axis scale can be directly marked on the edge of the four-column structure along the Z-axis direction, without adding the Z-axis scale additionally. The accommodating groove can be used for vertically accommodating the Y-axis graduated scale therein, so that all accessories of the distance measuring device can be conveniently and integrally carried.

In one embodiment, a configuration block for fixing the positioning member at the reference position is disposed on an end surface of the positioning member.

Specifically, the configuration block of the positioning element may be fixedly connected to the reference position in the measurement environment by fixing means such as adhesion, snap or weight. Further, the counterweight article can flexibly use tools such as a wrench and the like. The positioning piece is firmly connected to the reference position in the measuring environment, so that the accuracy of distance measurement can be guaranteed.

In one embodiment, the X-axis gauge includes an X-axis scale having a range greater than or equal to 6000mm and a lightweight housing to house the X-axis scale. The Z-axis measuring instrument comprises a Z-axis graduated scale and a light shell used for accommodating the Z-axis graduated scale, and the measuring range of the Z-axis graduated scale is larger than or equal to 18000 mm. The Y-axis measuring instrument comprises a Y-axis graduated scale and a light shell used for containing the Y-axis graduated scale, and the measuring range of the Y-axis graduated scale is larger than or equal to 12000 mm.

Specifically, referring to the body dimensions of most automobiles, the X-axis scale is designed with a range tape that is greater than or equal to 6000 mm. The Y-axis scale is designed by selecting the laser marking scale of the aluminum alloy flat strip, and the measuring range is larger than or equal to 1200 mm. The Z-axis graduated scale is designed by selecting an aluminum alloy hollow square tube, and marking scales on the outer surface by laser, wherein the measuring range is larger than or equal to 1800 mm. The device for measuring the distance is small in size and light in weight under the condition of satisfying the measurement of the automobile body.

Alternatively, in order to control the cost and the overall weight of the distance measuring apparatus, the X-axis distance measuring apparatus 120, the Y-axis distance measuring apparatus 130, and the Z-axis distance measuring apparatus 140 may not be provided with a housing, and in order to improve the safety and the service life of the distance measuring apparatus, a lightweight housing, such as an aluminum alloy housing or a plastic housing, may be added to the X-axis distance measuring apparatus 120, the Y-axis distance measuring apparatus 130, and the Z-axis distance measuring apparatus 140.

In an embodiment, as shown in fig. 6, the mounting platform 110 includes an X-axis laser ranging device 123 disposed along the X-axis direction for measuring a distance of the position to be measured along the X-axis direction relative to the reference position 300. A slidable Z-axis laser ranging apparatus 143 is included on the Z-axis ranging apparatus 140 to measure the distance of the position to be measured 210 on the target to be measured 200 in the Z-axis direction with respect to the reference position 300. The Z-axis laser ranging apparatus 143 includes a Y-axis laser ranging apparatus 142 along the Y-axis for measuring a distance of the position to be measured relative to the reference position 300 along the Y-axis. Specifically, the Y-axis laser ranging device 142 and the Z-axis laser ranging device 143 may be fixed together by a fixing method such as adhesion or binding.

Specifically, the present embodiment may further adopt an X-axis laser ranging device 123, a Y-axis laser ranging device 142, and a Z-axis laser ranging device 143 instead of at least one of the X-axis scale, the Y-axis scale, and the Z-axis scale, respectively. The orientations of the X-axis laser ranging device 123, the Y-axis laser ranging device 142 and the Z-axis laser ranging device 143 are set to be the X-axis direction, the Y-axis direction and the Z-axis direction respectively, so that the accurate reading of the position to be measured relative to the reference position along the three directions is facilitated.

Alternatively, when the X-axis laser ranging apparatus 123, the Y-axis laser ranging apparatus 142, and the Z-axis laser ranging apparatus 143 are completely employed to replace the X-axis scale, the Y-axis scale, and the Z-axis scale, respectively, the Y-axis laser ranging apparatus and the Z-axis laser ranging apparatus are disposed on the Z-axis ranging apparatus 140 in different orientations without the Y-axis ranging apparatus 130 and the contact terminal 132, further reducing the volume of the device for measuring distance. At this time, the distance measuring device is moved to the side of the position to be measured along the X axis direction, and the heights of the Y axis direction laser ranging device 142 and the Z axis direction laser ranging device 143 which are fixed to the whole body are adjusted, so that the laser sent by the Y axis direction laser ranging device 142 is aligned to the position to be measured 210 on the target to be measured 200, and the distance of the position to be measured relative to the reference position can be obtained. The structure does not need Y-axis distance measuring equipment and a contact end on the Y-axis distance measuring equipment to touch the position to be measured, so that the measuring process is simplified, and the measuring accuracy is improved.

In one embodiment, rollers or tracks are arranged at the bottom of the movable carrying platform to realize the movement of the distance measuring device.

Specifically, the bottom of the movable carrying platform is provided with the roller or the crawler matched with the guide rail, so that the device for measuring the distance can be flexibly moved and placed conveniently, and the measuring requirements of measuring positions to be measured at different positions are met.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An apparatus for measuring distance, comprising:

a movable carrying platform;

2. The device for measuring distance according to claim 1, wherein the X-axis distance measuring apparatus further comprises a telescopic X-axis measuring instrument having an outlet end, the positioning member being disposed at the outlet end, such that when the carrying platform moves away from the reference position, the X-axis measuring instrument is stretched along the X-axis direction to measure the distance of the position to be measured relative to the reference position in the X-axis direction.

3. The apparatus for measuring distance according to claim 1, wherein the Z-axis distance measuring device includes a Z-axis measuring instrument disposed along the Z-axis for measuring a distance in the Z-axis direction of the position to be measured with respect to the reference position.

4. The apparatus for measuring distance according to claim 1, wherein the Y-axis distance measuring device includes a Y-axis measuring instrument disposed along the Y-axis, and the contact end is used as a free end of the Y-axis measuring instrument to measure the distance of the position to be measured in the Y-axis direction with respect to the reference position.

5. The apparatus for measuring distance according to claim 4, wherein the Y-axis ranging device further comprises a slider slidably disposed on the Z-axis ranging device in a vertical direction; the Y-axis measuring instrument is movably arranged on the sliding piece along the Y-axis.

6. The apparatus for measuring distance according to claim 5, wherein the Z-axis distance measuring device comprises a column having a receiving groove along the Z-axis for receiving the Y-axis measuring instrument, and the receiving groove has a length greater than or equal to that of the Y-axis measuring instrument.

7. The distance measuring device according to claim 1, wherein the positioning member includes a disposition block to fix the positioning member at the reference position.

8. The distance measuring apparatus according to claim 1, wherein the positioning member is fixed at the reference position by adhesion.

9. The device for measuring distance of claim 2, wherein the X-axis measuring instrument comprises an X-axis scale having a range greater than or equal to 6000mm and a lightweight housing to accommodate the X-axis scale.

10. A device for measuring distance according to claim 3 wherein the Z-axis gauge comprises a Z-axis scale having a range greater than or equal to 18000mm and a lightweight housing to accommodate the Z-axis scale.

11. The device for measuring distance of claim 4, wherein the Y-axis measuring instrument comprises a Y-axis scale and a lightweight housing for accommodating the Y-axis scale, and the range of the Y-axis scale is more than or equal to 12000 mm.

12. The apparatus for measuring distance according to claim 1, wherein the mounting platform includes an X-axis laser ranging device disposed along the X-axis for measuring the distance of the position to be measured in the X-axis direction relative to the reference position.

13. The apparatus for measuring distance of claim 12 wherein the Z-axis ranging device comprises a Z-axis laser ranging device slidable in the Z-axis direction to measure the distance of the position to be measured in the Z-axis direction relative to the reference position.

14. The apparatus for measuring distance according to claim 13, wherein the Z-axis laser ranging device includes a Y-axis laser ranging device disposed along the Y-axis to measure the distance of the position to be measured in the Y-axis direction with respect to the reference position.

15. The distance measuring apparatus according to claim 1, wherein a roller or a crawler is provided at a bottom of the movable carrying platform.

16. The apparatus for measuring distance according to claim 1, wherein the Z-axis distance measuring device is disposed on the top of the carrying platform through a turntable for horizontally rotating the Z-axis distance measuring device relative to the top surface of the carrying platform.