A spatial displacement measurement device and method based on force-displacement conversion

Abstract

The technology of the present invention belongs to the field of engineering measurement technology, and proposes a spatial displacement measurement device based on force-displacement conversion, including: a box body, which defines a cavity inside, and the box body is endowed with a flow state that enables the working fluid arranged in the cavity to have a flow state along the first direction; at least one pair of working surfaces, which are arranged relatively in the cavity and cooperate to form a measurement interval distributed along the second direction; a measurement component, which has a plurality of measurement ends arranged in the measurement interval, and the measurement ends are configured to have a switchable active or fixed state in the second direction, and a force measuring instrument, which is arranged outside the cavity and is provided with a plurality of measurement ends and connected one by one to a plurality of measurement ends, and the force measuring instrument is used to obtain the force signal of the connected measurement ends; wherein, when the working fluid moves along the first direction, the working fluid contacts any one of the measurement ends, and the measurement end is fixed in the second direction to form a force toward the first direction. The present invention can improve the effect of spatial displacement measurement.

Description

Technical Field

[0001] The technology of the present invention belongs to the field of engineering measurement technology, and in particular relates to a spatial displacement measurement device and method based on force-displacement conversion. Background Art

[0002] Since the occurrence of earthquakes often triggers soil deformation and flow, resulting in the complete destruction or even burial of large-scale buildings, half of the foundation failures caused by earthquakes are caused by soil liquefaction. Among them, the zero effective influence state of part of the foundation soil at the epicenter and after the earthquake, the zero effective stress state of the liquefied foundation soil, and the fluid dynamic response mechanism of the soil under the earthquake damage state have always been the research focus and difficulty of geological engineering measurement.

[0003] In the prior art, the response of liquefied soil flow dynamics is mainly measured by interacting with the soil in the liquefied site and using a follower mechanism set in the soil to measure the flow direction. However, in general, the overall test device is relatively complex, and the visualization of the test results is low. In the process of simulating soil flow, there is a lack of consideration of different motion conditions generated in the system, resulting in certain limitations in the test measurement results. Therefore, a spatial displacement measurement device is urgently needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a spatial displacement measurement device and method based on force-displacement conversion, aiming to solve at least one of the above-mentioned problems and to improve the effect of spatial displacement measurement.

[0005] To achieve the above object, the present invention provides the following solution: a spatial displacement measurement device based on force-displacement conversion, comprising:

[0006] A box body, defining a cavity therein, wherein the box body is configured to enable a working medium arranged in the cavity to flow in a first direction;

[0007] At least one pair of working surfaces are arranged opposite to each other in the cavity and cooperate to form a measuring interval distributed along the second direction;

[0008] a measuring component having a plurality of measuring ends arranged in the measuring interval, the measuring ends being configured to have a switchable active or fixed state in the second direction, and

[0009] A force measuring instrument is arranged outside the cavity, and is provided in plurality and connected to the plurality of measuring ends in a one-to-one correspondence, and is used to obtain a force signal connected to the measuring ends;

[0010] When the working medium moves along the first direction, the working medium contacts any one of the measuring ends, and the measuring end is fixed in the second direction to form a force toward the first direction.

[0011] Preferably, the plurality of measuring ends are evenly distributed in an array on the section end of the measuring interval.

[0012] Preferably, the distance between any one of the measuring ends and a pair of the working surfaces is the same.

[0013] Preferably, the measuring component comprises:

[0014] A force transmission line is arranged in the cavity and is evenly distributed in an array along the second direction, and a contact piece is arranged on the force transmission line;

[0015] When the working medium moves along a first direction, the contact member contacts the working medium, the force transmission line is in a tensioned state, the force transmission line has a force directed toward the first direction, and the force measuring instrument is connected to the force transmission line to obtain a force signal of the force transmission line.

[0016] Preferably, the contact element comprises:

[0017] The induction body is a spherical structure and is slidably fitted on the force transmission line. The induction body is provided with an adjustment mechanism with a switchable unlocking or locking state. When the adjustment mechanism is in the unlocking state, the induction body slides relative to the force transmission line. When the adjustment mechanism is in the locking state, the induction body is fixed relative to the force transmission line.

[0018] Preferably, it also includes:

[0019] A fixing seat, fixedly connected to the outer wall of the box body, a through slot is provided on a side of the fixing seat close to the box body, the force measuring instrument is fixed on the fixing seat, and one end of the force transmission line passes through the through slot and is relatively fixed to the acquisition end of the force measuring instrument;

[0020] The tensioning seat is fixedly connected to the outer wall of the box body relative to the fixed seat. A through hole is opened in the tensioning seat. The other end of the force transmission line away from the fixed seat is passed through the through hole. A tensioning bolt is threadedly connected to the tensioning seat. When the force transmission line is in a tensioned state, one end of the tensioning bolt extends into the through hole and abuts against the force transmission line.

[0021] Preferably, the force measuring instrument is a three-axis force sensor.

[0022] Preferably, an opening is provided on a side of the box body away from the working surface, and the opening is located in the middle of adjacent end surfaces.

[0023] Preferably, a plurality of positioning holes are provided on one side of the box body close to the working surface, wherein two positioning holes on a pair of the working surfaces are located in the same axial direction.

[0024] A measurement method, applied to the above-mentioned spatial displacement measurement device based on force-displacement conversion, comprises the following steps:

[0025] Filling the box with working fluid, and arranging the measuring components and the force measuring instrument on the box;

[0026] Arranging a plurality of force transmission lines in an array in the cavity along a second direction while keeping them in a tensioned state;

[0027] Switch the movable and fixed states of the contact pieces, adjust the positions of the contact pieces, and ensure that the contact pieces on several force transmission lines are on the same cutting surface during the process;

[0028] Controlling the working fluid to flow in a first direction, and fixing the contact piece relative to the force transmission line, so that the working fluid contacts the contact piece to provide the force transmission line with a force in the first direction;

[0029] The force signal of the force transmission line is measured by a force measuring instrument, the thrust generated at different positions in the cavity when the working fluid flows is obtained, the force diagrams of several force transmission lines are recorded, and the spatial displacement study of the flow characteristics of the soil is realized.

[0030] Compared with the prior art, the present invention has the following advantages and technical effects:

[0031] The present invention can simulate soil liquefaction in different movement directions under actual conditions, and realizes force measurement of the flow state of the working fluid by setting a measuring component and utilizing a plurality of measuring ends of the measuring component arranged in the measuring interval. Specifically, the working fluid contacts the measuring end, so that the measuring end is forced to form a force in a first direction along the flow of the working fluid. The measuring end is connected with a force measuring instrument to collect and obtain the force signal generated by the force, thereby realizing spatial displacement measurement. The overall measuring device is easy to use, and combined with the force signal obtained by the force measuring instrument, the visualization degree of the working fluid flow detection is improved, thereby realizing the improvement of the overall spatial displacement measurement effect.

[0032] In addition, the present invention assigns a plurality of measuring ends to be connected to a plurality of force measuring instruments in a one-to-one correspondence, and at the same time, any measuring end has a switchable fixed or active state relative to a pair of working surfaces. When the measuring end is active, the distance between the measuring end and the working surface can be adjusted according to measurement needs. When the working fluid flows along the first direction, the distance between the working fluid and the inner wall of the box directly determines the magnitude of the thrust generated by the flow of the working fluid. Therefore, the position of the measuring end can be adjusted. On the basis of ensuring that the measuring end is relatively fixed in the second direction, the measurement of various spatial displacement conditions can be realized, thereby further improving the measurement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0034] Figure 1 It is a structural diagram of the box;

[0035] Figure 2 is the array distribution diagram of the fixed seat;

[0036] Figure 3 This is the position relationship diagram of the force measuring instrument and the fixing seat;

[0037] Figure 4 It is a structural schematic diagram of the tensioning seat;

[0038] Figure 5 is a schematic diagram of the structure of the sensor;

[0039] Among them, 1. box body; 2. working surface; 3. force measuring instrument; 4. force transmission line; 5. induction body; 6. adjusting bolt; 7. fixing seat; 8. tensioning seat; 9. tensioning bolt; 10. connecting block; 11. fixing bolt; 12. opening; 13. positioning hole. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example: Refer to Figure 1-Figure 5 , a spatial displacement measurement device based on force-displacement conversion, comprising:

[0043] A box body 1 defines a cavity inside, and the box body 1 is provided with a flow state that enables a working medium arranged in the cavity to have a flow state along a first direction;

[0044] At least one pair of working surfaces 2 are arranged opposite to each other in the cavity and cooperate to form a measuring interval distributed along the second direction;

[0045] A measuring component having a plurality of measuring ends arranged in a measuring interval, wherein the measuring ends are configured to have a switchable active or fixed state in a second direction, and

[0046] A force measuring instrument 3 is arranged outside the cavity and is provided with a plurality of force measuring instruments and connected to a plurality of measuring ends in a one-to-one correspondence. The force measuring instrument 3 is used to obtain force signals of the connected measuring ends;

[0047] When the working medium moves along the first direction, the working medium contacts any one of the measuring ends, and the measuring end is fixed in the second direction to form a force toward the first direction.

[0048] The present invention uses a box body 1 to define a cavity, and fills the cavity with a working medium so that the working medium forms a flow state along a first direction, thereby simulating the soil flow in the space, and is convenient for producing a simulation effect of soil liquefaction along different movement directions under actual conditions by adjusting the flow direction of the working medium. In addition, at least one pair of working surfaces 2 is arranged in the cavity, and a measurement interval distributed along a second direction is formed in the cavity. By setting a measurement component, a plurality of measurement ends of the measurement component arranged in the measurement interval are used to realize the force measurement of the flow state of the working medium. Specifically, the working medium contacts the measurement end, so that the measurement end is forced to form a force along the first direction of the working medium flow. The measurement end is connected through a force measuring instrument 3, and the force signal generated by the force is collected and obtained, thereby realizing the spatial displacement measurement. The overall measuring device is easy to use, and combined with the force signal obtained by the force measuring instrument 3, the visualization of the working medium flow detection is improved, thereby realizing the improvement of the overall spatial displacement measurement effect.

[0049] Moreover, in the present technical solution, a plurality of measuring ends are connected to a plurality of force measuring instruments 3 in a one-to-one correspondence, and any measuring end has a switchable fixed or active state relative to a pair of working surfaces 2. When the measuring end is active, the distance between the measuring end and the working surface 2 can be adjusted according to measurement needs. When the working fluid flows along the first direction, the distance between the working fluid and the inner wall of the box 1 directly determines the magnitude of the thrust generated by the flow of the working fluid. Therefore, the position of the measuring end can be adjusted. On the basis of ensuring that the measuring end is relatively fixed in the second direction, the measurement of various spatial displacement conditions can be realized, thereby further improving the measurement effect.

[0050] Furthermore, a plurality of measuring ends are evenly distributed in an array on the section end of the measuring interval.

[0051] In the technical solution, a plurality of measuring ends are arranged at the same intervals with respect to each other, and are distributed in an array on the cross-sectional end of the measuring interval. When the working fluid flows along the first direction, the working fluid can sequentially pass through the plurality of measuring ends distributed in the array, thereby achieving measurement of the thrust generated on the measuring end when the working fluid is at different positions in space on the cross-sectional end relative to the cavity, thereby improving the overall system's consideration of different motion conditions, improving the systematic data richness of the measuring device, and achieving an improvement in the spatial displacement measurement effect.

[0052] In one embodiment of the present invention, the first direction is perpendicular to the second direction, and the flow direction of the working medium can be parallel to the end surface of the evenly distributed cross-section ends of the plurality of measuring ends in a matrix;

[0053] In another embodiment of the present invention, the first direction is not perpendicular to the second direction, and the flow direction of the working medium can meet the end faces of the ends of the matrix-uniformly distributed cross-sections of the plurality of measuring ends;

[0054] By comparing the force signal measurement results generated by the cooperation of several measuring ends and the force measuring instrument 3 in the two cases where the first direction is perpendicular or non-perpendicular to the second direction, the thrust generated when the soil flows in the vertical direction or the inclined direction under actual conditions is simulated, thereby improving the persuasiveness of the measurement data results.

[0055] Furthermore, the distances between any measuring end and a pair of working surfaces 2 are the same.

[0056] By using movable measuring ends and making the distances between several measuring ends and a pair of working surfaces 2 the same, the measuring ends are distributed in the middle position of the cavity. As a result, during the flow of the working fluid, when the working fluid acts on any measuring end, the hindering effect of the flow force generated by the inner wall of the box body 1 acts on the measuring end in a balanced posture, thereby achieving the measurement effect of improving the feedback of the working fluid flow thrust by the measuring end and combining with the force measuring instrument 3 to measure data.

[0057] Further, the measuring component comprises:

[0058] A force transmission line 4 is arranged in the cavity and is evenly distributed in an array along the second direction. A contact piece is arranged on the force transmission line 4;

[0059] When the working medium moves along the first direction, the contact piece contacts the working medium, and the force transmission line 4 remains in a tensioned state, so that the force transmission line 4 is driven by the contact piece to have a force in the first direction, and the force measuring instrument 3 is connected to the force transmission line 4 for obtaining the force signal of the force transmission line 4.

[0060] By arranging a plurality of force transmission lines 4 in the cavity, and erecting the plurality of force transmission lines 4 in the cavity along the second direction, the force transmission lines 4 are distributed in an array in the measuring interval, and combined with contact pieces arranged on the force transmission lines 4, a plurality of measuring ends in the cavity are formed, and the contact pieces contact the working fluid to drive the force transmission lines 4 to generate force, so that the force measuring instrument 3 is connected to the force transmission lines 4 to obtain force signals, and the thrust measurement of the spatial displacement is performed.

[0061] In this technical solution, the force transmission line 4 is a common steel wire, which is tensioned and fixed in the cavity to form an obstacle to the flow direction of the working fluid. When the working fluid contacts the contact piece, the thrust of the working fluid is measured. The overall structure is simple and easy to use.

[0062] Furthermore, the contact element comprises:

[0063] The induction body 5 is a spherical structure and is slidably fitted on the force transmission line 4. The induction body 5 is provided with an adjustment mechanism that can switch between an unlocked or locked state. When the adjustment mechanism is in an unlocked state, the induction body 5 slides relative to the force transmission line 4. When the adjustment mechanism is in a locked state, the induction body 5 is fixed relative to the force transmission line 4.

[0064] By adopting a spherical structure for the induction body 5, the force transmission line 4 passes through the induction body 5 along the center accordingly, and the induction body 5 and the force transmission line 4 are adjusted by the adjustment mechanism, so that the sliding or fixation of the induction body 5 relative to the force transmission line 4 is achieved, the adjustment requirements of the measuring end are met, and the effective measurement is guaranteed.

[0065] Specifically, the adjustment mechanism can adopt a common adjustment bolt 6, which is threadedly connected to the induction body 5. On the basis that the force transmission line 4 passes through the induction body 5, the adjustment bolt 6 is against or not in contact with the force transmission line 4, so as to realize the regulation of the state of the induction body 5, facilitate the actual operation of personnel, and improve the measurement efficiency.

[0066] Furthermore, it also includes:

[0067] The fixing seat 7 is fixedly connected to the outer wall of the box body 1. A through groove is provided on the side of the fixing seat 7 close to the box body 1. The force measuring instrument 3 is fixed on the fixing seat 7. One end of the force transmission line 4 passes through the through groove and is relatively fixed to the acquisition end of the force measuring instrument 3.

[0068] The tensioning seat 8 is fixedly connected to the outer wall of the box body 1 relative to the fixed seat 7. A through hole is opened in the tensioning seat 8. The other end of the force transmission line 4 away from the fixed seat 7 is passed through the through hole. A tensioning bolt 9 is threadedly connected to the tensioning seat 8. When the force transmission line 4 is in a tensioned state, one end of the tensioning bolt 9 extends into the through hole and abuts against the force transmission line 4.

[0069] In the technical solution, a threaded hole is opened on the box body 1, and correspondingly, a plurality of bolts are passed through the tensioning seat 8 and the fixing seat 7 to fix the tensioning seat 8 and the fixing seat 7 to the box body 1, and at the same time, the two ends of the force transmission line 4 arranged along the second direction pass through the tensioning seat 8 and the fixing seat 7 respectively, wherein the force measuring instrument 3 is fixed by the fixing seat 7, and the acquisition end of the force measuring instrument 3 is fixed relative to the force transmission line 4, and the other end of the force transmission line 4 passes through the tensioning seat 8, and is adjusted by rotating the tensioning bolt 9 to abut or not contact the force transmission line 4. After the force transmission line 4 is tensioned to produce a tensioned state, it is locked by the tensioning bolt 9 to meet the need of measuring through the force transmission line 4.

[0070] Furthermore, the force measuring instrument 3 is a three-axis force sensor.

[0071] Specifically, the force measuring instrument 3 is fixedly connected to the fixing seat 7, and the acquisition end of the three-axis measurement sensor, namely the connecting block 10, is extended into the through groove, and is threadedly connected to the connecting block 10 through the fixing bolt 11. The force transmission line 4 is extended into the center of the connecting block 10, and the fixing bolt 11 is extended into the center to abut against the force transmission line 4, so that the force transmission line 4 and the connecting block 10 are fixed. When the induction body 5 receives the thrust of the working fluid, the force transmission line 4 drives the connecting block 10 to deflect and generate an induction force, and the induction force is obtained by the three-axis measurement sensor, thereby obtaining the force acting on the force transmission line 4 under actual conditions.

[0072] Furthermore, an opening 12 is provided on a side of the box body 1 away from the working surface 2 , and the opening 12 is located in the middle of the adjacent end surfaces.

[0073] By opening the opening 12 on one side of the box body 1, the working medium flows from the cavity to the opening 12, which facilitates the arrangement and use of the overall measuring device.

[0074] In one embodiment of the present invention, the opening 12 has a diameter smaller than the end surface area of ​​the housing 1, and is combined with a plurality of inductors 5 arranged in the middle of the cavity when the working fluid flows, so that the working fluid can flow in the direction of the center symmetry of the cross-sectional end of the inductor 5, and move from the opening 12 direction of the inner wall surface of the cavity respectively. When the working fluid moves, the working fluid can generate different thrust magnitudes and action directions according to the different distances from the inner wall surface of the cavity. At the same time, the remaining inner wall surface on the side of the opening 12 of the housing 1 also blocks the flow of the working fluid, so that the thrust base of the working fluid flow in the overall test can be adjusted by changing the size of the opening 12, thereby enhancing the simulation degree of the spatial displacement, and combining with a plurality of inductors 5 arrayed at the central cross-sectional end, the measurement effect of the working fluid displacement is fully improved.

[0075] In another embodiment of the present invention, the diameter of the opening 12 is equal to the end surface area of ​​the box body 1. At this time, the working fluid flows along the first direction without being restricted by the diameter of the opening 12. The thrust effect of the working fluid on the several inductive bodies 5 in the center of the cavity only exists in the flow force of the working fluid itself and part of the flow-impeding force caused by wall adhesion. The remaining inner wall surface on the side of the opening 12 of the box body 1 loses its barrier effect on the working fluid. At this time, the spatial displacement measurement can produce a working fluid flow condition different from that in the above-mentioned embodiment. Therefore, on the basis of improving the degree of spatial displacement simulation by adjusting the size of the opening 12, the simulation test conditions of the spatial displacement measurement are further enriched, and the test effect is improved. Moreover, the improvement of the effect can be achieved by only changing the size of the opening 12 of the box body 1, which reduces the complexity of the device to a limited extent and improves the convenience of measurement and use.

[0076] Furthermore, a plurality of positioning holes 13 are formed on one side of the box body 1 close to the working surface 2 , wherein two positioning holes 13 on a pair of working surfaces 2 are located in the same axial direction.

[0077] A measurement method, applied to the above-mentioned spatial displacement measurement device based on force-displacement conversion, comprises the following steps:

[0078] Fill the box 1 with working fluid, and arrange the measuring assembly and the force measuring instrument 3 on the box 1;

[0079] A plurality of force transmission lines 4 are arranged in an array in the cavity along the second direction while maintaining the tensioned state;

[0080] Switching the movable and fixed states of the contact pieces, adjusting the positions of the contact pieces, and ensuring that the contact pieces on the force transmission lines 4 are at the same cut surface end during the process;

[0081] Control the working fluid to flow in a first direction, and fix the contact piece relative to the force transmission line 4, so that the working fluid contacts the contact piece to provide a force to the force transmission line 4 in the first direction;

[0082] The force signal of the force transmission line 4 is measured by the force measuring instrument 3, the thrust generated at different positions in the cavity when the working medium flows is obtained, and the force diagrams of several force transmission lines 4 are recorded to realize the spatial displacement study of the flow characteristics of the soil.

[0083] The working process of this embodiment is as follows:

[0084] Before filling the working fluid into the cavity, the fixing seat 7 and the tensioning seat 8 are installed on the outer wall of the box body 1, and the force measuring instrument 3 is fixed to the fixing seat 7, and the two ends of the force transmission line 4 are respectively fixed to the acquisition end of the force measuring instrument 3 and the tensioning seat 8, and the tension state of the force transmission line 4 is maintained, and the position of the induction body 5 on the force transmission line 4 is adjusted by the adjusting bolt 6 on the induction body 5, so that a plurality of induction bodies 5 are distributed in an array on the central cross-section end of the cavity, and the working fluid is filled into the cavity after the opening 12 on one side of the box body 1 is blocked. Specifically, during the process of filling the working fluid, the force measuring instrument is maintained. 3 is reset to zero to avoid affecting the accuracy of the measurement result when the working fluid actually flows. By opening the opening 12, the working fluid flows along the direction from the cavity to the opening 12. During the process, the working fluid contacts the induction body 5, and the induction body 5 is fixed relative to the force transmission line 4, thereby providing a force on the force transmission line 4. At this time, the force transmission line 4 is measured by the force measuring instrument 3, and the flow force of the working fluid can be measured. The flow of the working fluid can be obtained by cooperating with a number of induction bodies 5 evenly distributed on the cut end, thereby realizing the measurement of the force and flow direction of the displacement in the soil space.

[0085] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A spatial displacement measurement device based on force-displacement conversion, characterized in that: include: A box body (1) defines a cavity therein, the box body (1) being configured to enable a working medium arranged in the cavity to flow in a first direction; At least one pair of working surfaces (2) are arranged opposite to each other in the cavity and cooperate to form a measuring interval distributed along the second direction; a measuring component having a plurality of measuring ends arranged in the measuring interval, the measuring ends being configured to have a switchable active or fixed state in the second direction, and A force measuring instrument (3) is arranged outside the cavity and is provided in plurality and connected to the plurality of measuring ends in a one-to-one correspondence, the force measuring instrument (3) being used to obtain a force signal connected to the measuring end; Wherein, when the working medium moves along the first direction, the working medium contacts any one of the measuring ends, and the measuring end is fixed in the second direction to form a force toward the first direction; The measuring assembly comprises: A force transmission line (4) is arranged in the cavity and is evenly distributed in an array along the second direction, and a contact piece is arranged on the force transmission line (4); When the working medium moves in a first direction, the contact member contacts the working medium, the force transmission line (4) is in a tensioned state, the force transmission line (4) is subjected to a force in the first direction, and the force measuring instrument (3) is connected to the force transmission line (4) for obtaining a force signal of the force transmission line (4); An opening (12) is provided on a side of the box body (1) away from the working surface (2), and the opening (12) is located in the middle of adjacent end surfaces.

2. The spatial displacement measuring device based on force-displacement conversion according to claim 1 is characterized in that: The plurality of measuring ends are evenly distributed in an array on the section end of the measuring interval.

3. The spatial displacement measuring device based on force-displacement conversion according to claim 1 is characterized in that: The distances between any one of the measuring ends and a pair of the working surfaces (2) are the same.

4. The spatial displacement measurement device based on force-displacement conversion according to claim 1 is characterized in that: The contact element comprises: The induction body (5) is a spherical structure and is slidably fitted on the force transmission line (4). The induction body (5) is provided with an adjustment mechanism that can switch between an unlocked state and a locked state. When the adjustment mechanism is in the unlocked state, the induction body (5) slides relative to the force transmission line (4); when the adjustment mechanism is in the locked state, the induction body (5) is fixed relative to the force transmission line (4).

5. The spatial displacement measuring device based on force-displacement conversion according to claim 1 is characterized in that: Also includes: A fixing seat (7) is fixedly connected to the outer wall of the box body (1), a through groove is formed on a side of the fixing seat (7) close to the box body (1), the force measuring instrument (3) is fixed on the fixing seat (7), and one end of the force transmission line (4) passes through the through groove and is fixed relative to the acquisition end of the force measuring instrument (3); The tensioning seat (8) is fixedly connected to the outer wall of the box body (1) relative to the fixing seat (7); a through hole is provided in the tensioning seat (8); the other end of the force transmission line (4) away from the fixing seat (7) is passed through the through hole; a tensioning bolt (9) is threadedly connected to the tensioning seat (8); when the force transmission line (4) is in a tensioned state, one end of the tensioning bolt (9) extends into the through hole and abuts against the force transmission line (4).

6. The spatial displacement measurement device based on force-displacement conversion according to claim 1 is characterized in that: The force measuring instrument (3) is a three-axis force sensor.

7. The spatial displacement measurement device based on force-displacement conversion according to claim 1 is characterized in that: A plurality of positioning holes (13) are provided on one side of the box body (1) close to the working surface (2), wherein two positioning holes (13) on a pair of the working surfaces (2) are located in the same axial direction.

8. A measurement method, applied to the spatial displacement measurement device based on force-displacement conversion according to any one of claims 1 to 3, characterized in that: The following steps are involved: Filling a working fluid into a box (1), and arranging a measuring component and a force measuring instrument (3) on the box (1); Arranging a plurality of force transmission lines (4) in an array in the cavity along a second direction while keeping them in a tensioned state; Switching the movable and fixed states of the contact piece, adjusting the position of the contact piece, and ensuring that the contact pieces on a plurality of force transmission lines (4) are at the same cutting surface end during the process; Controlling the working fluid to flow in a first direction, and fixing the contact piece relative to the force transmission line (4), so that the working fluid and the contact piece contact to provide the force transmission line (4) with a force in the first direction; The force measuring instrument (3) is used to measure the force signal of the force transmission line (4), obtain the thrust generated at different positions in the cavity when the working fluid flows, record the force diagrams of several force transmission lines (4), and realize the spatial displacement research on the flow characteristics of the soil.

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