Portable distance measuring device for engineering surveying

Abstract

The utility model discloses a portable distance measuring device for engineering surveying, which comprises a handheld part, the front end of the handheld part is provided with a spherical groove, the inside of the spherical groove is connected with a ball in a rolling manner, the front end of the ball is fixedly connected with a laser distance measuring sensing end, and the bottom of the ball is fixedly connected with a gravity cone. The laser ranging sensing end can be kept in a horizontal state, the horizontal distance between the handheld ranging device and a detected object is measured, the situation that the measurement precision is affected due to the fact that the laser ranging device inclines in the measurement process and does not conduct horizontal measurement is avoided, when the sliding button is located at the front end, the laser ranging sensing end is in an automatic horizontal state, and the measurement precision is improved. When the sliding button is located at the rear end, the laser ranging sensing end is kept towards the front end of the handheld part, distance measurement in a non-horizontal state is facilitated, and when horizontal distance measurement is needed, the sliding button is pushed forwards, the pull rope is made to relieve tension limiting between the pull rope and the ball, and the laser ranging sensing end is kept in a horizontal state for distance measurement.

Description

Technical Field

[0001] This utility model relates to the field of engineering surveying technology, and in particular to a portable distance measuring device for engineering surveying. Background Technology

[0002] In the field of engineering surveying, distance measuring devices are core tools for ensuring construction accuracy and efficiency. With the increasing complexity of engineering scenarios and the diversification of measurement needs, these devices are crucial for ensuring the accuracy and reliability of engineering projects. In the construction of large-scale projects such as bridges, tunnels, and roads, accurate measurement data is a vital guarantee of construction precision and quality. Traditional distance measuring methods, such as measuring with tape measures or manual estimation, are not only time-consuming and labor-intensive but also prone to errors. Distance measuring devices, such as laser rangefinders, can quickly and accurately complete distance measurements, greatly improving work efficiency. This is of great significance for shortening construction periods and saving labor costs.

[0003] Most portable distance measuring devices used in engineering surveying employ laser distance measurement, but half of the measurement requirements are horizontal distances, and it is difficult to achieve a perfectly horizontal measurement during the process.

[0004] A portable distance measuring device for engineering surveying is disclosed in Chinese patent document CN114111744B. This portable distance measuring device includes a main unit, a drawer, and a central column. A support plate is fixedly connected to the middle of the main unit. A distance measuring instrument is embedded in the top center of the support plate. A storage frame is fixedly connected to the bottom center of the support plate. Fixing members are fixedly connected to both sides of the bottom of the support plate. A connecting member is connected through the bottom of the fixing member. A lifting cylinder is connected through the bottom of the connecting member. The lifting cylinder moves the support plate and the distance measuring instrument together via the fixing member and the connecting member. When the operator gets tired, a lifting rod can be pulled out and fixed from the lifting cylinder. Then, the connecting member is attached to the ground via casters. After attachment, the operator can hold the extended lifting rod and move the casters, thus moving the entire device. Therefore, the carrying mechanism is convenient for operators to carry the entire device after use and allows for adjustments to the carrying method according to actual conditions. However, this portable distance measuring device for engineering surveying is relatively large and inconvenient for horizontal adjustment.

[0005] To address the shortcomings of the existing technology, providing a portable distance measuring device for engineering surveying is a problem worthy of research. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing portable distance measuring devices for engineering surveying, which mostly use laser distance measuring, but half of the measurement requirements are horizontal distances, and it is difficult to achieve a completely horizontal measurement during the measurement process. This invention provides a portable distance measuring device for engineering surveying that achieves the technical effect of automatic level correction.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A portable ranging device for engineering surveying includes a handheld part, a spherical groove at the front end of the handheld part, a ball bearing that is rotatably connected inside the spherical groove, a laser ranging sensor fixedly connected to the front end of the ball bearing, and a gravity cone fixedly connected to the bottom of the ball bearing.

[0009] The front end of the spherical groove is open, and the inner diameter of the spherical groove is adapted to the diameter of the ball. A circular groove is opened at the bottom of the spherical groove. The axis of the laser ranging sensor is perpendicular to the axis of the gravity cone. The laser ranging sensor of this ranging device can keep a horizontal state and measure the horizontal distance between the handheld ranging device and the object being detected, avoiding the situation where the laser measuring device is tilted during the measurement process, which would lead to non-horizontal measurement and affect the measurement accuracy.

[0010] The frictional force between the spherical groove and the ball is less than the weight of the gravity cone.

[0011] The laser ranging sensor includes a laser generator and a laser receiver, and the laser ranging sensor is electrically connected to the handheld part.

[0012] The top of the handheld part is provided with a sliding groove, and a sliding button is slidably connected inside the sliding groove. A connecting groove is provided between the spherical groove and the sliding groove, and a pull rope is fixedly connected between the rear end of the ball and the sliding button.

[0013] When the sliding button is slid to the rear end of the slide groove, the pull rope tightens the ball. When the sliding button of the device is at the front end, the laser rangefinder is in an automatic horizontal state. When the sliding button is at the rear end, the laser rangefinder remains facing the front end of the handheld part, which is convenient for distance measurement in non-horizontal states.

[0014] The spherical groove has a contraction groove at its rear end. The contraction groove is arc-shaped and its thickness is adapted to the thickness of the pull rope.

[0015] Both sides of the front end of the slide groove are provided with circular holes. A compression spring is fixedly connected inside the circular hole. The other end of the compression spring is fixedly connected to the sliding button. When the compression spring is contracted, its length matches the depth of the circular hole. When the compression spring is extended, it pushes the sliding button to the rear end of the slide groove. When horizontal distance measurement is required, the sliding button is pushed forward to release the tension limit between the pull rope and the ball, allowing the ball to roll freely, thereby keeping the laser distance measuring sensor in a horizontal state for distance measurement.

[0016] A first button is provided on both sides of the front end of the slide, and a second button is provided on the outer side of the rear end of the slide. Both the first and second buttons are electrically connected to the laser rangefinder. When either the first or second button is triggered, the laser rangefinder is activated to perform distance measurement.

[0017] A distance display screen is fixedly connected to the front end of the slide, and the distance display screen is electrically connected to the laser rangefinder.

[0018] Positive and beneficial effects:

[0019] 1. The portable distance measuring device used in this project can keep the laser distance measuring sensor horizontal, and measure the horizontal distance between the handheld distance measuring device and the object being measured, avoiding the situation where the laser measuring device is tilted during the measurement process, which would lead to non-horizontal measurement and affect the measurement accuracy.

[0020] 2. The portable distance measuring device used in this project has the following characteristics: when the sliding button is in the front position, the laser distance measuring sensor is in an automatic horizontal state; when the sliding button is in the rear position, the laser distance measuring sensor is kept facing the front of the handheld part, which is convenient for distance measurement in non-horizontal states.

[0021] 3. The portable distance measuring device used in this project can be used to measure distance horizontally. When horizontal distance measurement is required, push the sliding button forward to release the tension limit between the pull rope and the ball bearing, allowing the ball bearing to roll freely, thereby keeping the laser distance measuring sensor in a horizontal state for distance measurement. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 This is a bottom view of the structure of this utility model;

[0025] Figure 4 This is a top view of the structure of this utility model;

[0026] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0027] Figure 6 This is a cross-sectional structural diagram of the present invention;

[0028] Figure 7 This utility model Figure 6 Enlarged structural diagram at point C;

[0029] Figure 8 This utility model Figure 6 A magnified structural diagram at point D.

[0030] In the diagram: 1-Handheld part, 2-Spherical groove, 3-Ball bearing, 4-Laser rangefinder sensor end, 5-Gravity cone, 6-Circular groove, 7-Slide groove, 8-Sliding button, 9-Connecting groove, 10-Pull cord, 11-Retracting groove, 12-Circular hole, 13-Compression spring, 14-First button, 15-Second button, 16-Distance display screen. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] Example 1

[0033] like Figures 1 to 8 As shown, a portable ranging device for engineering measurement includes a handheld part 1, a spherical groove 2 is provided at the front end of the handheld part 1, a ball bearing 3 is slidably connected inside the spherical groove 2, a laser ranging sensor end 4 is fixedly connected to the front end of the ball bearing 3, and a gravity cone 5 is fixedly connected to the bottom of the ball bearing 3.

[0034] like Figures 6 to 8 As shown, the front end of the spherical groove 2 is open, and the inner diameter of the spherical groove 2 is adapted to the diameter of the ball 3. A circular groove 6 is provided at the bottom of the spherical groove 2. The axis of the laser ranging sensor end 4 is perpendicular to the axis of the gravity cone 5. By setting the ball 3 that can roll the laser ranging sensor end 4 at the front end of the handheld part 1, the gravity cone 5 remains vertically downward under the action of gravity. Then, the laser ranging sensor end 4, which is perpendicular to the gravity cone 5, maintains a horizontal sensing orientation. This allows the laser ranging sensor end 4 of the ranging device to remain horizontal and measure the horizontal distance between the handheld ranging device and the object being measured. This avoids the situation where the laser measuring device is tilted during the measurement process, which would cause the measurement to be not horizontal and affect the measurement accuracy.

[0035] The friction between the spherical groove 2 and the ball 3 is less than the weight of the gravity cone 5. By limiting the friction between the spherical groove 2 and the ball 3, the weight of the gravity cone 5 is sufficient to affect the rolling of the ball 3, so that the ball rolls and adjusts according to the weight of the gravity cone 5.

[0036] The laser ranging sensor 4 includes a laser generator and a laser receiver. The laser ranging sensor 4 is electrically connected to the handheld part 1. The laser generator and laser receiver in the laser ranging sensor 4 work together to calculate the time it takes for the laser to travel back and forth and measure the distance.

[0037] Furthermore, a flexible wire is provided at the rear end of the ball bearing 3, which can maintain an electrical connection with the handheld part 1 during the rolling process, provide power to the laser rangefinder sensor 4, and transmit the measured data to the display device.

[0038] Example 2

[0039] like Figures 1 to 8 As shown, a groove 7 is provided on the top of the handheld part 1, and a sliding button 8 is slidably connected inside the groove 7. A connecting groove 9 is provided between the spherical groove 2 and the groove 7. A pull rope 10 is fixedly connected between the rear end of the ball 3 and the sliding button 8.

[0040] like Figures 6 to 8 As shown, when the sliding button 8 is slid to the rear end of the slide groove 7, the pull rope 10 tightens the ball 3. By setting the sliding button 8 with the pull rope 10 on the top of the handheld part 1, when the sliding button 8 is slid to the rear end of the slide groove 7, the pull rope 10 is tightened, which fixes and limits the ball 3, so that the laser rangefinder sensor end 4 keeps facing forward. The automatic horizontal state of the laser rangefinder sensor end 4 is canceled, and it can keep facing the front of the handheld part 1. When the sliding button 8 of this device is at the front end, the laser rangefinder sensor end is in an automatic horizontal state. When the sliding button 8 is at the rear end, the laser rangefinder sensor end keeps facing the front end of the handheld part 1, which is convenient for distance measurement in a non-horizontal state.

[0041] like Figures 6 to 7 As shown, a contraction groove 11 is provided at the rear end of the spherical groove 2. The contraction groove 11 is arc-shaped and its thickness is adapted to the thickness of the pull rope 10. By providing a contraction groove 11 at the rear end of the spherical groove 2, the pull rope 10 can retract into the contraction groove 11 during the rolling of the ball 3, thus avoiding affecting the normal rolling of the ball 3.

[0042] Example 3

[0043] like Figures 4 to 5 As shown, circular holes 12 are provided on both sides of the front end of the slide groove 7. A compression spring 13 is fixedly connected inside the circular hole 12. The other end of the compression spring 13 is fixedly connected to the sliding button 8. When the compression spring 13 is contracted, its length matches the depth of the circular hole 12. When the compression spring 13 is extended, it pushes the sliding button 8 to the rear end of the slide groove 7. By setting the compression spring 13 at the front end of the slide groove 7, under normal circumstances, the sliding button 8 can be tightly fixed at the rear end of the slide groove 7, so that the laser ranging sensor end 4 of the ranging device is kept facing the front end of the handheld part 1. When horizontal ranging is required, the sliding button 8 is pushed forward to release the tension limit between the pull rope 10 and the ball 3, so that the ball 3 can roll freely, thereby keeping the laser ranging sensor end 4 in a horizontal state for distance measurement.

[0044] like Figures 5 to 8 As shown, a first button 14 is provided on both sides of the front end of the slide groove 7, and a second button 15 is provided on the outer side of the rear end of the slide groove 7. Both the first button 14 and the second button 15 are electrically connected to the laser ranging sensor 4. When either the first button 14 or the second button 15 is triggered, the laser ranging sensor 4 is activated to perform distance measurement. By providing the first button 14 at the front end inside the slide groove 7, when the sliding button 8 is pushed forward to the front section, the laser ranging sensor 4 is in a horizontal state. At this time, the thumb is used to push the sliding button 8, which is inconvenient for other operations. Only by continuing to exert force forward can the first button 14 be activated to start the laser ranging sensor 4 to perform distance measurement, making the measurement operation of the device more convenient and easy to use.

[0045] like Figures 5 to 8 As shown, a distance display screen 16 is fixedly connected to the front end of the slide 16, and the distance display screen is electrically connected to the laser rangefinder 4.

[0046] The working principle of this utility model is as follows:

[0047] S1. Under the action of gravity, the gravity cone 5 remains vertically downward, and the laser ranging sensor end 4, which is perpendicular to the gravity cone 5, remains horizontally oriented. This allows the laser ranging sensor end 4 of the ranging device to remain horizontal and measure the horizontal distance between the handheld ranging device and the object being measured. This avoids the situation where the laser measuring device is tilted during the measurement process, which would cause the measurement to be not horizontal and affect the measurement accuracy.

[0048] S2. Under normal circumstances, the sliding button 8 can be pressed and fixed to the rear end of the slide groove 7, so that the laser ranging sensor end 4 of the ranging device is kept facing the front end of the handheld part 1.

[0049] S3. When horizontal distance measurement is required, push the sliding button 8 forward to release the tension limit of the pull rope 10 and the ball 3, so that the ball 3 can roll freely, thereby keeping the laser distance measuring sensor 4 in a horizontal state for distance measurement.

[0050] S4. When the sliding button 8 is pushed forward to the front, the laser rangefinder sensor 4 is in a horizontal position. At this time, the thumb is used to push the sliding button 8, and it is inconvenient to perform other operations. Just continue to push forward to trigger the first button 14 to start the laser rangefinder sensor 4 to measure the distance.

Claims

1. A portable ranging device for engineering surveying, characterised in that: Including handheld part (1), the front end of handheld part (1) is provided with spherical groove (2), the inside of spherical groove (2) is connected with ball (3) rolling, the front end of ball (3) is fixedly connected with laser ranging sensor end (4), the bottom of ball (3) is fixedly connected with gravity cone (5).

2. The portable ranging device for engineering surveying according to claim 1, characterized in that: The front end of spherical groove (2) is open, the inner diameter of spherical groove (2) is adapted to the diameter of ball (3), the bottom of spherical groove (2) is provided with circular groove (6), the axis of laser ranging sensor end (4) is perpendicular to the axial direction of gravity cone (5).

3. The portable ranging device for engineering surveying according to claim 2, characterized in that: The friction between spherical groove (2) and ball (3) is less than the gravity of gravity cone (5).

4. The portable ranging device for engineering surveying of claim 1, wherein: Laser ranging sensor end (4) includes laser generator and laser receiving device, and is electrically connected with handheld part (1).

5. The portable range device for engineering surveying according to claim 1, characterized in that: The top of handheld part (1) is provided with sliding groove (7), the inside of sliding groove (7) is connected with sliding button (8) slidingly, the communication groove (9) is arranged between spherical groove (2) and sliding groove (7), and the rear end of ball (3) and sliding button (8) are fixedly connected with pull rope (10).

6. The portable ranging device for engineering surveying according to claim 5, characterized in that: When sliding button (8) slides to the rear end of sliding groove (7), pull rope (10) is pulled tightly.

7. The portable ranging device for engineering surveying according to claim 6, characterized in that: The rear end of spherical groove (2) is provided with contraction groove (11), and the contraction groove (11) is circular arc, and the thickness of contraction groove (11) is adapted to the thickness of pull rope (10).

8. The portable ranging device for engineering surveying according to claim 6, characterized in that: The front end of sliding groove (7) is provided with circular hole (12) on both sides, the inside of circular hole (12) is fixedly connected with compression spring (13), the other end of compression spring (13) is fixedly connected with sliding button (8), the length of compression spring (13) is adapted to the depth of circular hole (12) when compression spring (13) is contracted, and sliding button (8) is pushed to the last end of sliding groove (7) when compression spring (13) is elongated.

9. A portable ranging device for engineering surveying according to claim 8, characterised in that: The front end of sliding groove (7) is provided with first button (14) on both sides, the rear end of sliding groove (7) is provided with second button (15) on the outside, the first button (14) and the second button (15) are electrically connected with laser ranging sensor end (4), and the first button (14) or the second button (15) is triggered to start laser ranging sensor end (4) to measure distance.

10. The portable range device for engineering surveying according to claim 6, characterized in that: The front end of sliding groove (7) is fixedly connected with distance display screen (16), and the distance display screen is electrically connected with laser ranging sensor end (4).

Images