A lifting gravity measurement system based on mobile carrier

Abstract

The present invention discloses a lifting gravity measurement system based on a mobile carrier, belonging to the field of inertial measurement technology. The system includes a mobile carrier, a gravity measurement module, and a lifting platform. The mobile carrier is used to load the gravity measurement module and the lifting platform and transport them to a measurement location. The gravity measurement module is mounted on the lifting platform and is used to measure the gravity value at the measurement location with high precision. The lifting platform is used to directly support the gravity measurement module on the ground and separate it from the mobile carrier. The lifting gravity measurement system based on the mobile carrier of the present invention has good measurement accuracy and high measurement efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of inertial measurement, and more specifically, relates to a lifting gravity measurement system based on a mobile vehicle. Background Art

[0002] Gravity is the combined force of the Earth and the centrifugal forces of an object's inertia, and it varies with position and time. High-precision gravity measurements have important applications in fields such as geophysics and resource exploration. Currently, high-precision gravimeters (relative or absolute) can measure gravity with an accuracy of several μGal (1 μGal = 10-9 g), which can meet the requirements of most outdoor gravity measurement applications. In actual outdoor gravity measurements, due to the large measurement area and the large number of measurement points, gravimeters are usually placed on mobile vehicles to improve measurement efficiency.

[0003] Gravimeters are highly susceptible to vibration, and theoretically, it's impossible to distinguish between vibration noise and gravitational acceleration. Therefore, the sensitivity of a gravimeter is directly limited by the vibration noise of the test environment. During typical measurements, the gravimeter is placed on a mobile carrier during transportation. Upon arrival at the test point, the gravimeter is removed and placed on the ground to reduce the severe vibration noise of the mobile carrier. While this measurement method can effectively reduce the impact of the mobile carrier's vibration noise on the gravimeter's measurement accuracy, it is time-consuming and labor-intensive. Alternatively, the gravimeter is also placed on the mobile carrier during measurement, with a vibration isolation platform placed between them. This can also reduce the impact of the mobile carrier's vibration noise on the gravimeter, but this method has a significant disadvantage: it takes more than ten minutes or even longer for the vibration isolation platform to stabilize after arriving at the measurement point, which undoubtedly increases the measurement time at each measurement point and reduces measurement efficiency. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a lifting gravity measurement system based on a mobile carrier, which is used to isolate the vibration noise of the mobile carrier, aiming to solve the problem of the influence of the vibration noise of the mobile carrier on the measurement accuracy, improve the measurement accuracy and improve the measurement efficiency at the same time.

[0005] To achieve the above-mentioned object, the present invention provides a lifting type gravity measurement system based on a mobile carrier, comprising a mobile carrier, a gravity measurement module and a lifting platform;

[0006] The mobile carrier is used to load the gravity measurement module and the lifting platform and transport them to the measurement location;

[0007] The gravity measurement module is arranged on the lifting platform and is used to measure the gravity value of the measurement position with high precision;

[0008] The lifting platform is used to directly support the gravity measurement module on the ground and to separate it from the mobile vehicle.

[0009] Furthermore, the gravity measurement module includes a control cabinet and a gravimeter probe, and the control cabinet and the gravimeter probe are connected by optical fiber and cable for signal transmission.

[0010] Furthermore, the lifting platform includes an attitude adjustment platform for installing the gravimeter probe, and a lifting support assembly is provided at the bottom of the attitude adjustment platform. The lifting support assembly can directly support the attitude adjustment platform on the ground and separate it from the mobile vehicle.

[0011] Furthermore, the lifting support assembly includes a cylindrical mounting seat fixed to the bottom of the posture adjustment platform, the cylindrical mounting seat is hollow inside and open at both ends, a cover plate is provided above the cylindrical mounting seat, a drive motor is fixed under the cover plate, the output end of the drive motor is provided with a lead screw, and the external thread of the lead screw is connected to a support column. When the drive motor is working, it can drive the lead screw to rotate and thereby make the support column move downward and contact the ground, thereby achieving the disengagement of the posture adjustment platform and the mobile carrier.

[0012] Furthermore, a through hole corresponding to the support column is provided at the bottom of the mobile carrier, and a shaft sleeve for guiding the movement of the columnar mounting seat is also provided at the bottom of the mobile carrier.

[0013] Furthermore, the outer wall of the support column is symmetrically provided with a limit boss for guiding and limiting during linear motion, the inner wall of the cylindrical mounting seat is provided with a limit groove corresponding to the limit boss, and the bottom of the cylindrical mounting seat is provided with an annular limit part for limiting when the limit boss moves to the lower limit position.

[0014] Furthermore, the mobile carrier is evenly distributed with locking components for fixing the posture adjustment platform during transportation. The locking components include a mounting base fixed to the mobile carrier. A height-adjustable L-shaped pressure block is detachably provided in the middle of the mounting base. The L-shaped pressure block is used to press and fix the posture adjustment platform.

[0015] Furthermore, a sliding groove for mounting and positioning the L-shaped pressing block is provided on the mounting seat, a strip-shaped hole is provided on the side wall of the sliding groove, and the mounting seat and the L-shaped pressing block are connected by screws.

[0016] Furthermore, the attitude adjustment platform is further provided with a tilt measurement unit, and the tilt measurement unit is used to measure the angle between the sensitive axis of the gravimeter probe and the gravity direction.

[0017] Furthermore, the number of the lifting support components is 3-6.

[0018] Compared with the prior art, the above technical solution conceived by the present invention is provided with a lifting support assembly. When performing gravity measurement, the gravimeter probe can be directly supported on the ground and separated from the mobile carrier at the same time, thereby isolating the vibration of the mobile carrier from affecting the measurement accuracy of the gravimeter probe, thereby improving the measurement accuracy. In addition, a posture adjustment platform is provided, which can adjust the angle between the sensitive axis of the gravimeter probe and the direction of gravity to ensure the accuracy during measurement. At the same time, a tilt measurement unit is provided on the posture adjustment platform, which can directly obtain the angle between the sensitive axis of the gravimeter probe and the direction of gravity, thereby facilitating the rapid adjustment of the direction of the sensitive axis to the direction of gravity. In addition, under the transportation of the mobile carrier, measurement can be carried out whenever the vehicle stops, thereby improving the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a transportation state diagram of the lifting gravity measurement system based on a mobile carrier of the present invention;

[0020] Figure 2 This is a measurement state diagram of the lifting gravity measurement system based on a mobile carrier of the present invention;

[0021] Figure 3 This is a measurement flow chart of the lifting gravity measurement system based on a mobile carrier of the present invention;

[0022] Figure 4 Schematic diagram of the installation of the attitude adjustment platform of the lifting type gravity measurement system based on the mobile carrier of the present invention;

[0023] Figure 5 is a cross-sectional view of a lifting support assembly of a lifting gravity measurement system based on a mobile carrier according to the present invention;

[0024] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0025] The structures corresponding to the numbered marks in the accompanying drawings are: 1-mobile carrier, 11-control cabinet, 12-gravity meter probe, 13-optical fiber, cable, 21-attitude adjustment platform, 22-lifting support assembly, 221-column mounting seat, 2211-limiting groove, 2212-annular limiting part, 222-connecting plate, 223-drive motor, 224-screw, 225-support column, 2251-limiting boss, 226-sleeve. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See Figures 1 to 3 The present invention provides a lifting gravity measurement system based on a mobile carrier, comprising: a mobile carrier 1, a gravity measurement module and a lifting platform; wherein the mobile carrier 1 is used to carry the gravity measurement module and the lifting platform and transport them to the measurement location. The mobile carrier 1 is mainly used for land transportation and can be any land transportation tool such as a motor vehicle or a train; the gravity measurement module is arranged on the lifting platform and is used to measure the gravity value of the measurement location with high precision. In the actual measurement process, the gravity value is divided into absolute gravity measurement or relative gravity measurement. Therefore, the gravity measurement module is a high-precision absolute gravimeter or a high-precision relative gravimeter; the lifting platform is used to directly support the gravity measurement module on the ground and to separate it from the mobile carrier, so as to avoid the vibration of the mobile carrier from affecting the measurement accuracy.

[0028] The high-precision absolute gravimeter or high-precision relative gravimeter includes a control cabinet 11 and a gravimeter probe 12. The control cabinet 11 and the gravimeter probe 12 are connected by optical fiber and cable for signal transmission. In this embodiment, in order to ensure absolute gravity measurement in an outdoor vehicle environment, the gravimeter in this example is a high-precision absolute gravimeter. In order to facilitate the fixation of the control cabinet 11, the control cabinet 11 is fixed on the mobile carrier 1, and the control cabinet 11 can also be directly fixed on the lifting platform.

[0029] The lifting platform includes a posture adjustment platform 21 for installing the gravimeter probe 12. The posture adjustment platform 21 is used to adjust the angle between the gravimeter probe 12 and the direction of gravity to ensure that the gravimeter probe 12 is parallel to the direction of gravity during measurement. Since the angle between the gravimeter probe 12 and the direction of gravity is unknown during adjustment, the posture adjustment platform 21 can only be fine-tuned continuously, which is time-consuming and labor-intensive. In order to quickly adjust the gravimeter probe 12 to be parallel to the direction of gravity, a tilt measuring unit is also provided on the posture adjustment platform 21. The tilt measuring unit is used to measure the angle between the sensitive axis of the gravimeter probe 12 and the direction of gravity. In this embodiment, the tilt measuring unit is an inclinometer. The inclinometer is an instrument that can directly read the inclination of the installation plane and can directly obtain the angle between the measurement sensitive axis direction of the gravimeter probe 12 and the direction of gravity. Before measurement, the sensitive axis of the gravimeter probe 12 and the direction of gravity are adjusted to be consistent through the posture adjustment platform 21.

[0030] In order to prevent the vibration of the mobile vehicle 1 from affecting the measurement accuracy of the gravimeter probe 12, a lifting support assembly 22 is provided at the bottom of the attitude adjustment platform 21. The lifting support assembly 22 can directly support the attitude adjustment platform 21 on the ground and separate it from the mobile vehicle 1. The number of lifting support assemblies 22 is 3-6, and the number can be adjusted according to the specific support situation. In this embodiment, the number is 3; specifically, as shown in FIG. Figure 5As shown, the lifting support assembly 22 includes a cylindrical mounting seat 221 fixed to the bottom of the posture adjustment platform 21. The cylindrical mounting seat 221 is hollow inside and open at both ends. A cover plate 222 is provided above the cylindrical mounting seat 221, and a drive motor 223 is fixed below the cover plate 222. The output end of the drive motor 223 is provided with a screw 224, and the screw 224 is externally threaded with a support column 225. When the drive motor 223 is working, it can drive the screw 224 to rotate, thereby causing the support column 225 to move downward and contact the ground, thereby achieving the disengagement of the posture adjustment platform 21 and the mobile carrier 1. During transportation, the drive motor 223 rotates, driving the support column 225 to move upward, so that the support column 225 can be completely placed in the cylindrical mounting seat 221. A through hole corresponding to the support column 225 is opened at the bottom of the mobile carrier 1. Since the posture adjustment platform 21 needs to be guided when lifting, a shaft sleeve 226 for guiding the movement of the cylindrical mounting seat 221 is also provided at the bottom of the mobile carrier 1.

[0031] In order to make the support column 225 more stable during movement and avoid shaking, a limiting boss 2251 for guiding and limiting during linear motion is symmetrically provided on the outer wall of the support column 225, and a limiting groove 2211 is provided in the cylindrical mounting seat 221 to limit the limiting boss 2251. In order to prevent the support column 225 from disengaging from the screw 224 when moving to the lower limit position, an annular limiting portion 2212 corresponding to the limiting boss 2251 is provided in the cylindrical mounting seat 221.

[0032] In order to facilitate the locking and fixing of the posture adjustment platform 21 to the mobile carrier 1 during movement, the mobile carrier 1 is evenly distributed with locking components 3 for fixing the posture adjustment platform 21 during transportation. The locking components 3 include a mounting seat 31 fixed to the mobile carrier 1. A height-adjustable L-shaped pressure block 32 is detachably provided in the middle of the mounting seat 31. The L-shaped pressure block 32 is used to fix the posture adjustment platform 21. In order to facilitate the installation and positioning of the mounting seat 31 and the L-shaped pressure block, a slide groove for the installation and positioning of the L-shaped pressure block 32 is provided on the mounting seat 31. The side wall of the slide groove is provided with a strip hole. The mounting seat 31 and the L-shaped pressure block 32 are connected by screws. When fixing the posture adjustment platform, in order to avoid scratching the surface of the posture adjustment platform 21, a layer of soft plastic material can be sprayed on the surface of the L-shaped pressure block. The installation height of the L-shaped pressure block can be adjusted through the strip hole to press and fix the posture adjustment platform 21.

[0033] When using the lifting gravity measurement system based on the mobile carrier of this embodiment, before reaching the measurement position, the control cabinet 11 is fixed on the mobile carrier 1, and the gravimeter probe 12 is fixed on the attitude adjustment platform 21. The three lifting support assemblies 22 control the corresponding support columns to be in a retracted state for easy transportation; when reaching the measurement position, the three support columns are controlled to extend downward and contact the ground to support the attitude adjustment platform. After the support is stable, the support columns continue to extend by about 20 cm to completely disengage the columnar mounting seat and the mobile carrier 1. At this time, the attitude adjustment platform 21 and the gravimeter probe 12 rise together by about 20 cm. The gravimeter probe 12 is adjusted to be parallel to the direction of gravity through the attitude adjustment platform 21, so as to measure the gravity value. The specific measurement process is as follows Figure 3 As shown, step 1 corresponds to the transportation process of the lifting gravity measurement system of the mobile carrier, step 2 corresponds to the installation process of the lifting gravity measurement system based on the mobile carrier to reach the measurement position, and step 3 corresponds to the measurement process of the lifting gravity measurement system based on the mobile carrier.

[0034] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lifting gravity measurement system based on a mobile carrier, characterized by: It includes a mobile carrier (1), a gravity measurement module and a lifting platform; The mobile carrier (1) is used to load the high-precision gravity sensor and the lifting platform and transport them to the measurement location; The gravity measurement module is arranged on the lifting platform and is used to measure the gravity value of the measurement position with high precision; The lifting platform is used to support the gravity measurement module directly on the ground and to separate it from the mobile carrier; The lifting platform includes a posture adjustment platform (21) for installing a gravimeter probe (12), and lifting support components (22) are evenly distributed on the bottom of the posture adjustment platform (21). The lifting support components (22) can adjust the support angle between the posture adjustment platform (21) and the ground, and make the posture adjustment platform (21) and the mobile vehicle (1) disengage from each other; The lifting support assembly (22) includes a columnar mounting seat (221) fixed to the bottom of the posture adjustment platform (21), the columnar mounting seat (221) is hollow inside and open at both ends, a cover plate (222) is provided above the columnar mounting seat (221), a driving motor (223) is fixed below the cover plate (222), an output end of the driving motor (223) is provided with a lead screw (224), the outer side of the lead screw (224) is threadedly connected to a support column (225), when the driving motor (223) is working, it can drive the lead screw (224) to rotate, thereby causing the support column (225) to move downward and contact the ground to support the posture adjustment platform (21), after the support is stable, the support column (225) continues to extend so that the columnar mounting seat (221) and the mobile carrier (1) are completely out of contact, thereby achieving the disengagement of the posture adjustment platform (21) and the mobile carrier (1).

2. The lifting gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The gravity measurement module comprises a control cabinet (11) and a gravimeter probe (12); the control cabinet (11) and the gravimeter probe (12) are connected by optical fibers and cables for signal transmission.

3. The lifting gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The bottom of the mobile carrier (1) is provided with a through hole corresponding to the support column, and the bottom of the mobile carrier (1) is also provided with a shaft sleeve (226) for guiding the movement of the columnar mounting seat (221).

4. The lifting gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The outer wall of the support column (225) is symmetrically provided with a limiting boss (2251) for guiding and limiting during linear motion, the inner wall of the columnar mounting seat (221) is provided with a limiting groove (2211) corresponding to the limiting boss (2251), and the bottom of the columnar mounting seat (221) is provided with an annular limiting portion (2212) for limiting the limiting boss (2251) when it moves to the lower limit position.

5. The lifting gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The mobile carrier (1) is evenly provided with locking components (3) for fixing the posture adjustment platform (21) during transportation. The locking components (3) include a mounting seat (31) fixed to the mobile carrier (1). A height-adjustable L-shaped pressing block (32) is detachably provided in the middle of the mounting seat (31). The L-shaped pressing block (32) is used to fix the posture adjustment platform (21).

6. The lifting gravity measurement system based on a mobile carrier according to claim 5, characterized in that: The mounting seat (31) is provided with a sliding groove for mounting and positioning the L-shaped pressing block (32), and a strip-shaped hole is provided on the side wall of the sliding groove. The mounting seat (31) and the L-shaped pressing block (32) are connected by screws.

7. The lifting type gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The attitude adjustment platform is also provided with an inclination measurement unit, which is used to measure the angle between the sensitive axis of the gravimeter probe (12) and the direction of gravity.

8. The lifting gravity measurement system based on a mobile carrier according to claim 1, characterized in that: The number of the lifting support components is 3-6.

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