Quantum gravity vertical line inclination detection device based on floating mirror

Abstract

The present application belongs to the technical field of gravity exploration instrument and precise inclination detection, and particularly relates to a quantum gravity plumb line inclination detection device based on a floating mirror. The present application uses a liquid surface floating type plane mirror as a laser reflection reference, offsets the influence of liquid surface shaking and arc distortion, ensures stable reflection light path, and realizes high-precision and high-stability gravity plumb line inclination detection under complex working conditions.

Description

Technical Field

[0001] This invention relates to the fields of gravity exploration instruments and precision tilt angle detection technology, and in particular to a quantum gravity vertical tilt angle detection device based on a floating reflector. Background Technology

[0002] In the fields of mineral gravity exploration and geological vertical deviation detection, the free surface of highly reflective liquid media such as liquid mercury and gallium indium tin is often used to simulate the gravitational level. The tilt angle of the liquid surface is detected by laser reflection, and then the deviation of the gravitational vertical direction is calculated. Existing equipment directly uses the liquid surface of the liquid medium as the laser reflector, but it has obvious drawbacks in practical engineering applications: First, the field working environment cannot achieve a completely vibration-free state; slight ground movement and external disturbances will cause the liquid surface to continuously shake and deform. Second, liquid mercury, gallium indium tin, and other media have capillary effects, causing the liquid surface to arch upwards at the inner wall of the container, forming an arc-shaped surface. These problems will cause a significant shift in the laser reflection angle, and traditional photoelectric receiving devices are prone to losing the reflected light signal, resulting in interruption of tilt angle measurement, data failure, and the inability of the equipment to carry out detection work normally. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes a technical solution that utilizes a floating reflector structure to replace direct reflection from the liquid surface, thereby structurally isolating the optical path interference caused by liquid surface deformation and vibration, and improving the operational stability and measurement accuracy of the equipment.

[0004] The technical solution of this invention is implemented as follows: This invention discloses a gravity vertical tilt angle detection device based on a floating reflector, including a housing assembly, a motor lead screw slide rail component (1), a liquid storage box fixing seat (3), a first fastening screw (5), a second fastening screw (4), a sliding block (7), a micro switch (8), a liquid storage box component (6), a floating reflector assembly, a sealing assembly, a laser angle measuring optical path assembly, and a main control data processing assembly; The motor screw slide rail component (1) is fixed inside the housing assembly. The sliding block (7) is slidably connected to the slide rail body of the motor screw slide rail component (1). The liquid storage box fixing seat is fixed on the sliding block (7). The liquid storage box component (6) is detachably installed on the liquid storage box fixing seat (3). The micro switch (8) is set at the stroke limit position of the motor screw slide rail component (1). The motor screw slide rail component (1) drives the sliding block (7) and the liquid storage box component (6) to rise and fall to at least two measurement heights. The liquid storage box component (6) includes a liquid storage box body (61); The internal cavity of the liquid storage box body (61) is filled with a highly reflective liquid medium (62); The floating reflective assembly includes a floating base (63) and an optical reflector (64); The floating base (63) floats on the surface of the highly reflective liquid medium (62), and the optical mirror (64) is fixed to the upper end face of the floating base (63); The sealing assembly includes an O-ring (65) and a sealing cap (66); A sealing groove is provided on the upper end face of the liquid storage box body (61); The O-ring (65) is embedded in the sealing groove, and the sealing cover (66) is fastened to the top of the liquid storage box body (61) and presses the O-ring (65) tightly. The laser angle measuring optical path assembly is fixed to the upper part of the housing assembly and is used to emit a laser beam vertically downward to the optical reflector (64), receive the reflected beam and complete the acquisition of tilt angle data; The main control data processing component is controlled and connected to the motor lead screw slide rail component (1), the micro switch (8), and the laser angle measuring optical path component.

[0005] Furthermore, the highly reflective liquid medium (62) includes any one of liquid mercury, gallium indium tin alloy, and silver nanoparticle suspension.

[0006] Furthermore, it also includes a first fastening screw and a second fastening screw; The liquid storage box fixing base (3) is fixed to the sliding block (7) by the second fastening screw (4), and the liquid storage box component (6) is detachably installed on the liquid storage box fixing base (3) by the first fastening screw (5).

[0007] Furthermore, the material of the floating base (63) is PEEK or PP.

[0008] Furthermore, the bottom surface of the floating body base (63) is provided with a damping groove structure.

[0009] Furthermore, the floating base (63) has a regular hexagonal shape.

[0010] Furthermore, the optical reflector (64) is a K9 optical glass planar reflector.

[0011] Furthermore, the inner wall of the liquid storage box body (61) is provided with a gallium oxide isolation coating, and the high-reflectivity liquid medium (62) is a gallium indium tin alloy.

[0012] Furthermore, the O-ring (65) is made of fluororubber.

[0013] Furthermore, the motor lead screw slide rail component (1) includes a stepper drive motor and a transmission lead screw.

[0014] The advantages of this invention are as follows: First, solve the problem of light loss: use a floating base (63) with an optical reflector (64) as a reflection reference to replace the direct reflection of the liquid medium, isolate the reflection angle shift caused by liquid surface shaking and arc distortion, ensure the stability of the laser light path, and completely avoid the problem of the receiver losing light signal and angle measurement failure.

[0015] Second, excellent attitude stability: the floating base (63) can be designed as a regular hexagon and equipped with a bottom damping groove to suppress liquid surface circulation, floating body rotation and swaying; combined with the buoyancy of the highly reflective liquid medium (62), the reflective mirror always maintains a high precision level and the measurement repeatability is good.

[0016] Third, it is compatible with multiple media and has a wide range of applications: the storage box can hold three highly reflective media: liquid mercury, gallium indium tin alloy, and silver nano suspension. Liquid mercury can be used for laboratory calibration, gallium indium tin alloy with non-toxicity and low capillary effect is preferred for field exploration, and silver nano suspension can be used for lightweight scenarios, adapting to different usage needs.

[0017] Fourth, reliable sealing and comprehensive protection: The O-ring (65) combined with the sealing cover (66) achieves full sealing of the liquid storage box, preventing media leakage and evaporation; the micro switch (8) combined with the control algorithm forms a dual limit of software and hardware, avoiding overtravel collision of the lifting mechanism, and ensuring high equipment operation safety.

[0018] Fifth, easy disassembly and maintenance: The liquid storage box component (6) is fixed to the sliding block (7) in layers by the first fastening screw (5) and the second fastening screw (4), and can be disassembled and inspected and the liquid medium can be replaced separately, resulting in low maintenance costs in the later stage.

[0019] Sixth, high measurement accuracy: Continuing the principle of variable elevation differential angle measurement, eliminating the inherent error of the instrument system, and combined with a stable reflected light path, it greatly improves the detection accuracy of gravity vertical deviation, meeting the requirements of deep ore body exploration and high-precision geological testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a general assembly structure diagram of Embodiment 1 of the present invention; Figure 2for Figure 1 Exploded view of the floating reflective assembly inside the liquid storage box in the embodiment shown; Figure 3 for Figure 1 The diagram shown is a structural diagram of the floating body base in the embodiment shown. Figure 4 This is a structural diagram of the floating base of Embodiment 3 of the present invention. Detailed Implementation

[0022] The technical solutions of the present invention will now be clearly and completely described with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0024] In the description of specific embodiments of the present invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise explicitly defined.

[0025] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0026] In the description of the embodiments of the present invention, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0027] In addition, in this invention, the character " / " generally indicates that the objects before and after it are in an "or" relationship.

[0028] Overcoming the shortcomings of existing gravity vertical tilt angle detection devices that rely on direct reflection from a liquid medium, which is susceptible to vibration and capillary effects leading to reflected light path deviation and light loss failure, this invention uses a floating planar reflector on the liquid surface as a laser reflection reference. This counteracts the effects of liquid surface fluctuations and arc distortion, ensuring a stable reflected light path and achieving high-precision, high-stability gravity vertical tilt angle detection under complex working conditions. This invention discloses... Already A gravity vertical tilt angle detection device based on a floating reflector includes a housing assembly, a motor lead screw slide rail component (1), a liquid storage box fixing seat (3), a first fastening screw (5), a second fastening screw (4), a sliding block (7), a micro switch (8), a liquid storage box component (6), a floating reflector assembly, a sealing assembly, a laser angle measurement optical path assembly, and a main control data processing assembly.

[0029] The motor lead screw slide rail component (1) is fixedly installed inside the housing assembly. The sliding block (7) is slidably assembled on the linear slide rail of the motor lead screw slide rail component (1). It is driven by the internal stepper motor and lead screw and can slide smoothly back and forth in the vertical direction. The liquid storage box fixing seat (3) is locked and fixed on the mounting end face of the sliding block (7) by multiple sets of second fastening screws (4). The liquid storage box component (6) is detachably fixed on the liquid storage box fixing seat (3) by multiple sets of first fastening screws (5), making disassembly and maintenance convenient.

[0030] Microswitches (8) are installed at the upper and lower limit positions of the motor lead screw slide rail component (1). The microswitches (8) are electrically connected to the main control data processing component. With the built-in control algorithm, on the one hand, the precise positioning of the sliding slider (7) is achieved, ensuring the consistency of the position at different measurement elevations; on the other hand, a double limit is formed in both hardware and software to prevent the sliding slider (7) from overtraveling and colliding with the optical path device above.

[0031] The built-in control algorithm of the micro switch is an incremental PID closed-loop positioning control algorithm, which is a common control algorithm for industrial screw jacks.

[0032] The micro switch serves as the travel origin calibration switch: when the slider is powered on, it first moves downward to trigger the lower limit micro switch to complete the mechanical origin zeroing, eliminating the accumulated pitch error of the lead screw; the motor is equipped with an encoder to provide real-time feedback of rotation pulses, and the main controller adjusts the motor output speed / direction through a PID algorithm, driving the slider to rise and fall to the target elevation according to the set number of pulses. The PID algorithm will correct the position deviation in real time, so that the positioning repeatability accuracy can reach ±0.01mm when repeatedly going back and forth to the same elevation, ensuring the consistency of elevation position measured in different batches.

[0033] Hardware limit: The upper and lower limit micro switches physically cut off the motor drive circuit. Once the slider reaches the limit, the power is directly cut off and the machine is forced to stop, serving as the last line of protection. Software limit: The built-in control algorithm sets the soft limit threshold in advance (more inward than the trigger position of the hardware micro switch). When the encoder feedback position is close to the soft limit coordinate, the algorithm controls the motor to decelerate and stop the output in advance, preventing the slider from continuing to move towards the limit from the control level. The two layers of protection avoid collision with optical path devices.

[0034] During operation, the motor screw guide rail component (1) drives the liquid storage box component (6) to rise and fall to at least two different heights and then remain stationary. The main control data processing component collects the tilt angle data corresponding to the different heights and calculates the gravity vertical direction deviation of the test point through the data difference. The specific calculation method is as follows: The change in liquid surface tilt angle caused by gravity can be considered as a phase signal, which can be expressed as: Then the spatial phase modulation of the reflected light field can be expressed as: In the formula For wave number, The path difference caused by the mirror tilt can be simplified to a linear phase gradient under a small-angle approximation. Let's further assume... for Single-photon state of the mode, considering the lowest-order single-photon state as incident. , represented as: Expand the output state according to the HG mode basis: Using Bessel functions to generate relations: The output photon state can be derived as follows: To allow photons to pass through the aperture, when the aperture diameter satisfies... hour, and The pass rate can be simplified as: The tilt angle of the reflector is determined by receiving the filtered light beam, which can be expressed as a projection measurement: The precision limit can be reached through quantum Fisher information: The theoretical accuracy limit is given as: Where N represents the number of photons.

[0035] The liquid storage box component (6) includes a liquid storage box body (61), and the sealed cavity inside the liquid storage box body (61) is used to hold a highly reflective liquid medium (62). The highly reflective liquid medium (62) can be selected from any one of liquid mercury, gallium indium tin alloy, or silver nano suspension according to the application scenario.

[0036] In this invention, "any one" refers to selecting one element from the enumerated elements as the technical solution to be implemented. Since the enumerated elements have similar physicochemical properties, they also achieve similar technical effects under the same operating conditions. Those skilled in the art can choose according to their own technical reserves and actual needs; this invention does not impose any restrictions in this regard.

[0037] The inner wall of the liquid storage box body (61) is treated to prevent wetting according to the characteristics of the medium. When gallium indium tin alloy is selected, gallium oxide isolation coating is sprayed on the inner wall to suppress the capillary climbing phenomenon of liquid metal.

[0038] In some embodiments, a floating reflective component is provided on the surface of the highly reflective liquid medium (62) inside the liquid storage box body (61). The floating reflective component consists of a floating base (63) and an optical reflector (64).

[0039] The floating base (63) floats on the surface of the liquid medium and maintains a horizontal attitude following the gravity level. An optical reflector (64) is fixedly attached to the upper surface of the floating base (63). The high-precision flat lens is used as the laser reflection reference to completely get rid of the interference of the liquid surface shape.

[0040] In some preferred embodiments, the floating body base (63) is preferably a regular hexagonal structure with a damping groove on the bottom surface to further suppress swaying and self-rotation drift and improve attitude stability.

[0041] In some embodiments, an annular sealing groove is provided on the upper end face of the liquid storage box body (61), and an O-ring (65) is embedded in the sealing groove. The sealing cover (66) is fastened to the top of the liquid storage box body (61) and presses the O-ring (65) to form a sealed structure inside the liquid storage box body (61), preventing the highly reflective liquid medium (62) from evaporating and leaking, while reducing the disturbance of the internal liquid surface by the external airflow.

[0042] In some implementations, the O-ring (65) is made of fluororubber, which is corrosion resistant, has strong sealing performance, and is suitable for use with a variety of liquid media.

[0043] In some embodiments, a laser angle measurement optical path component is fixedly installed on the upper part of the housing assembly. The optical path component emits a collimated laser beam vertically downwards. The beam is incident vertically on the surface of the optical reflector (64) and, after reflection, is transmitted back to the optical path component to complete photoelectric signal acquisition and tilt angle calculation. The main control data processing component uniformly manages the operation of the whole machine, receives the position signal of the micro switch (8) and the tilt angle data of the laser angle measurement optical path component, and drives the motor screw slide rail component (1) to complete the lifting action. Finally, the gravity vertical deviation result is output according to the difference in tilt angle between multiple elevations.

[0044] The technical solution of the present invention will be described in more detail below through embodiments.

[0045] Example 1: In a specific Example 1, such as Figures 1-3 As shown, a gravity vertical tilt angle detection device based on a floating reflector has a motor screw slide rail component (1) fixed inside the housing assembly, and a sliding block (7) slidably mounted on the slide rail; the liquid storage box fixing seat (3) is fixed to the surface of the sliding block (7) by four sets of second fastening screws (4), and the liquid storage box body (61) is locked to the liquid storage box fixing seat (3) by four sets of first fastening screws (5); a micro switch (8) is installed at each of the upper and lower ends of the motor screw slide rail component (1) to realize stroke positioning and limit.

[0046] The inner wall of the liquid storage box body (61) is coated with a gallium oxide isolation coating, and the interior is filled with high-purity gallium indium tin alloy as the liquid medium (62). The floating base (63) is made of PEEK material, has a regular hexagonal shape, and a damping groove is machined on the bottom surface. The floating base (63) floats on the surface of the gallium indium tin liquid, and an optical reflector (64) made of K9 optical glass is attached to the upper end. A fluororubber O-ring (65) is embedded in the sealing groove at the upper end of the liquid storage box body (61), and the sealing cover (66) is fastened to complete the overall sealing.

[0047] The upper part of the housing is equipped with a laser angle measurement optical path assembly, and the whole machine is equipped with a main control data processing assembly. During on-site operation, after leveling the equipment and powering it on, the lifting mechanism drives the liquid storage box component (6) to be stationary at two heights in sequence to measure the angle. The system differentially calculates the gravity vertical deviation to complete the exploration and detection.

[0048] Example 2: In a specific example 2, a gravity vertical tilt angle detection device based on a floating reflector is constructed in a manner similar to that in Example 1, except that the highly reflective liquid medium (62) inside the liquid storage box (61) is replaced with high-purity liquid mercury. The high-purity liquid mercury is used for laboratory gravity vertical reference calibration.

[0049] Example 3: In a specific example 3, a gravity vertical tilt angle detection device based on a floating reflector has a structure that is basically the same as that in Example 1, except that: in this example, the floating base (63) is made of PP material, and the high-reflectivity liquid medium (62) is replaced with silver nano-organic suspension. This design simplifies the lifting stroke of the motor screw slide rail component (1), reduces the overall cost of the equipment, and is suitable for shallow conventional mineral gravity exploration. In addition, the floating base (632) in this example has a regular pentagonal structure, as shown in the figure. Figure 4 As shown.

[0050] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gravity vertical tilt angle detection device based on a floating reflector, characterized in that, It includes a housing assembly, a motor lead screw slide rail component (1), a liquid storage box fixing base (3), a first fastening screw (5), a second fastening screw (4), a sliding block (7), a micro switch (8), a liquid storage box component (6), a floating reflector assembly, a sealing assembly, a laser angle measuring optical path assembly, and a main control data processing assembly; The motor screw slide rail component (1) is fixed inside the housing assembly. The sliding block (7) is slidably connected to the slide rail body of the motor screw slide rail component (1). The liquid storage box fixing seat is fixed on the sliding block (7). The liquid storage box component (6) is detachably installed on the liquid storage box fixing seat (3). The micro switch (8) is set at the stroke limit position of the motor screw slide rail component (1). The motor screw slide rail component (1) drives the sliding block (7) and the liquid storage box component (6) to rise and fall to at least two measurement heights. The liquid storage box component (6) includes a liquid storage box body (61); The internal cavity of the liquid storage box body (61) is filled with a highly reflective liquid medium (62); The floating reflective assembly includes a floating base (63) and an optical reflector (64); The floating base (63) floats on the surface of the highly reflective liquid medium (62), and the optical mirror (64) is fixed to the upper surface of the floating base (63); The sealing assembly includes an O-ring (65) and a sealing cap (66); A sealing groove is provided on the upper end face of the liquid storage box body (61); The O-ring (65) is embedded in the sealing groove, and the sealing cover (66) is fastened to the top of the liquid storage box body (61) and presses the O-ring (65) tightly. The laser angle measuring optical path assembly is fixed to the upper part of the housing assembly and is used to emit a laser beam vertically downward to the optical reflector (64), receive the reflected beam and complete the acquisition of tilt angle data; The main control data processing component is controlled and connected to the motor lead screw slide rail component (1), the micro switch (8), and the laser angle measuring optical path component.

2. The apparatus according to claim 1, characterized in that, The highly reflective liquid medium (62) includes any one of liquid mercury, gallium indium tin alloy, and silver nanoparticle suspension.

3. The apparatus according to claim 1, characterized in that, It also includes the first fastening screw and the second fastening screw; The liquid storage box fixing base (3) is fixed to the sliding block (7) by the second fastening screw (4), and the liquid storage box component (6) is detachably installed on the liquid storage box fixing base (3) by the first fastening screw (5).

4. The apparatus according to claim 1, characterized in that, The material of the floating base (63) is PEEK or PP.

5. The apparatus according to claim 1, characterized in that, The bottom surface of the floating base (63) is provided with a damping groove structure.

6. The apparatus according to claim 1, characterized in that, The floating base (63) is hexagonal in shape.

7. The apparatus according to claim 1, characterized in that, The optical reflector (64) is a K9 optical glass planar reflector.

8. The apparatus according to claim 2, characterized in that, The inner wall of the liquid storage box body (61) is provided with a gallium oxide isolation coating, and the high reflectivity liquid medium (62) is a gallium indium tin alloy.

9. The apparatus according to claim 1, characterized in that, The O-ring (65) is made of fluororubber.

10. The apparatus according to claim 1, characterized in that, The motor lead screw slide rail component (1) includes a stepper drive motor and a transmission lead screw.

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