Distributed ice pressure measurement device

Abstract

The application relates to a distributed ice pressure measuring device, which comprises a bottom plate, fixing plates arranged on the bottom plate, a plurality of the fixing plates being distributed along the width direction of the bottom plate and each of the fixing plates extending along the length direction of the bottom plate, and force measuring units arranged on the fixing plates, a plurality of the force measuring units being distributed along the length direction of the fixing plates, the force measuring units being used for measuring ice pressure and transmitting pressure signals. The application can realize distributed measurement of the circumferential and axial coverage range of ice force action and solve the problem of uneven distribution of ice force action.

Description

Technical Field

[0001] This invention relates to the field of pressure sensor technology, specifically to a distributed ice pressure measuring device. Background Technology

[0002] In winter, northern sea areas are frozen, and offshore platforms are subjected to varying degrees of ice force, affecting the normal life and work of personnel on the platform, accelerating fatigue failure, and in severe cases, causing safety accidents. Therefore, measuring ice pressure on offshore platforms through testing technology is of great importance for ensuring personnel safety and for ice-resistant structural design.

[0003] Most existing ice force measurement devices are ice force boxes, which measure the magnitude of ice force by directly installing the ice force box at the point of ice action. Direct measurement using sensors such as ice force boxes is simple and easy to operate. However, due to the varying sizes and distributions of sea ice, the small coverage area of ​​ice force boxes, and the weak resistance of individual ice force boxes to off-center loading, it is difficult to accurately measure the magnitude of ice force perpendicular to the ice force box. Therefore, how to conveniently and quickly install sensors in marine environments and accurately and effectively measure ice loads remains a problem to be solved. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a distributed ice pressure measurement device that can achieve distributed measurement of the circumferential and axial coverage of ice force, thus solving the problem of uneven distribution of ice force.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The distributed ice pressure measuring device of the present invention includes: a base plate; a fixing plate disposed on the base plate, wherein a plurality of the fixing plates are distributed along the width direction of the base plate and each fixing plate extends along the length direction of the base plate; and a force measuring unit disposed on the fixing plate, wherein a plurality of the force measuring units are distributed along the length direction of the fixing plate, the force measuring unit being used to measure ice pressure and transmit pressure signals.

[0007] Preferably, the distributed ice pressure measuring device comprises: a pressure plate, a force transmission rod, a ball head, an upper cover, an upper support, a positioning pin, a cantilever beam, a lower support, and a base; the base is a shell structure with an open upper end, which is fixedly mounted on the fixing plate; the lower support is fixedly mounted on the bottom plate inside the base; the first end of the cantilever beam is fixedly connected to the lower support, and its second end has a protruding part with a spherical groove; the upper support is fitted onto the second end of the cantilever beam. The upper cover is closed and fixedly disposed at the upper opening of the base; the pressure plate is disposed above the upper cover; the first end of the force transmission rod extends into the pressure plate and is interference-fitted with the pressure plate, and the second end extends into the ball head and is interference-fitted with the ball head; the force transmission rod with the ball head passes through the upper cover and the upper support in sequence, and the ball head is accommodated in the spherical groove of the cantilever beam; the positioning pin passes through the side wall of the upper support and the side wall of the spherical groove in sequence and then presses against the ball head.

[0008] Preferably, the distributed ice pressure measuring device has a signal transmission component on the cantilever beam for transmitting the detected pressure signal.

[0009] Preferably, in the distributed ice pressure measurement device, the signal transmission component includes a fiber optic grating, an optical cable, a clamping component, and an encapsulation component; the fiber optic grating is disposed inside the cantilever beam or on one side wall, the optical cable passes through the fiber optic grating and contacts the fiber optic grating, and the two ends of the optical cable are clamped by the clamping component and then encapsulated by the encapsulation component; the optical cable is used to connect to an external signal receiving device.

[0010] Preferably, in the distributed ice pressure measuring device, the bottom of the fixing plate is provided with a groove, and the bottom of the base of the force measuring unit is provided with a through hole; the optical cable passes through the through hole and is accommodated in the groove, and then passes out along the groove.

[0011] Preferably, the distributed ice pressure measuring device further includes a cover plate, which is a shell structure and is placed on the fixed plate to accommodate several of the force measuring units inside the cover plate.

[0012] Preferably, the distributed ice pressure measuring device further includes hinges, with two hinges respectively disposed at both ends of the base plate, the hinges being used to fix the pressure measuring device to the offshore platform leg.

[0013] Preferably, the distributed ice pressure measuring device has cover plate slots on both sides of the cover plate corresponding to the hinge, so that when the cover plate is closed, both ends of the hinge extend out from the cover plate slots.

[0014] The present invention has the following advantages due to the adoption of the above technical solutions:

[0015] The force measuring unit of the ball joint structure of the present invention can release the bending moment caused by different application positions, so that the ice force obtained when the ice force is applied to different positions of the pressure plate is the same;

[0016] The force measuring unit array of the present invention is arranged on the base plate to realize distributed measurement of the circumferential and axial coverage of the ice force, thus solving the problem of uneven distribution of the ice force.

[0017] The cantilever beam of the present invention converts vertical ice force into lateral strain by generating bending strain, effectively reducing the thickness of the force measuring device. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention without the cover plate;

[0021] Figure 3 This is an exploded view of the force measuring unit of the present invention from the front view direction;

[0022] Figure 4 This is an exploded view of the force measuring unit of the present invention from the side view direction;

[0023] Figure 5 This is a schematic diagram of the structure of the fixing plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the base of the force measuring unit of the present invention;

[0025] Figure 7 This is an exploded view of the cantilever beam and the force transmission rod with a ball head of the present invention;

[0026] Figure 8 This is a layout diagram of the signal transmission component of the present invention.

[0027] The markings in the attached diagram are as follows:

[0028] 1-Cover plate; 2-Base plate; 3-Cover plate slot; 4-Hinge; 5-Fixing plate; 6-Force measuring unit; 7-Pressure plate; 8-Force transmission rod; 9-Ball head; 10-Upper cover; 11-Upper support; 12-Positioning pin; 13-Cantilever beam; 14-Lower support; 15-Base; 16-Groove; 17-Through hole; 18-Fiber grating; 19-Optical cable; 20-Holding component; 21-Encapsulation component. Detailed Implementation

[0029] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0030] This invention provides a distributed ice pressure measurement device. Each pressure measuring unit reduces the distance between the sensing device and the pile leg structure by converting pressure into cantilever beam bending strain. The pressure plate and the cantilever beam are in spherical hinge contact, which does not transmit bending moment, ensuring that the same ice force is obtained regardless of the location of the ice acting on the pressure plate. The gaps between the measuring units are separated by a suitable filling material, allowing each pressure measuring unit to operate independently in low-temperature freezing environments. This invention enables distributed measurement of the circumferential and axial coverage of ice force, solving the problem of uneven distribution of ice force.

[0031] like Figure 1 and Figure 2 As shown, the distributed ice pressure measuring device provided by the present invention includes: a base plate 2; a fixing plate 5 disposed on the base plate 2, wherein a plurality of fixing plates 5 are distributed along the width direction of the base plate 2 and each fixing plate 5 extends along the length direction of the base plate 2; and a force measuring unit 6 disposed on the fixing plate 5, wherein a plurality of force measuring units 6 are distributed along the length direction of the fixing plate 5, and the force measuring unit 6 is used to measure ice pressure and transmit pressure signals.

[0032] In the above embodiments, preferably, as follows: Figure 3 , Figure 4 and Figure 7As shown, the force measuring unit includes: a pressure plate 7, a force transmission rod 8, a ball head 9, an upper cover 10, an upper support 11, a positioning pin 12, a cantilever beam 13, a lower support 14, and a base 15. The base 15 is a shell structure with an open upper end, which is fixedly mounted on a fixing plate 5. Specifically, corresponding holes are provided on the fixing plate 5 and the base 15, and they are connected by bolts. The lower support 14 is fixedly mounted on the bottom plate inside the base 15, specifically, it is fixed by welding. The first end of the cantilever beam 13 is fixedly connected to the lower support 14, specifically, the two are connected by bolts. Its second end has a protruding part with a spherical groove. The upper support 11 is fitted onto the protruding part at the second end of the cantilever beam 13. The upper cover 10 is fitted onto and fixedly mounted at the upper opening of the base 15. Specifically, a threaded hole is provided on the outer edge of the top opening of the base 15, and the upper cover 10 is positioned accordingly. The upper cover 10 is provided with a through hole, and the top of the upper cover 10 and the base 15 are fixed by bolts; the pressure plate 7 is provided above the upper cover 10; the first end of the force transmission rod 8 extends into the pressure plate 7 and is interference-fitted with the pressure plate 7, and the second end extends into the ball head 9 and is interference-fitted with the ball head 9; the force transmission rod 8 with the ball head 9 passes through the upper cover 10 and the upper support 11 in sequence, and the ball head 9 is accommodated in the spherical groove of the cantilever beam 13; the positioning pin 12 passes through the side wall of the upper support 11 and the side wall of the spherical groove in sequence and is pressed against the ball head 9 to limit the ball head.

[0033] In the above embodiment, preferably, a signal transmission component is provided on the cantilever beam 13 for transmitting the detected pressure signal.

[0034] In the above embodiments, preferably, as follows: Figure 8 As shown, the signal transmission component includes a fiber optic grating 18, an optical cable 19, a clamping component 20, and an encapsulation component 21. The fiber optic grating 18 is disposed inside the cantilever beam 13 or on one side wall. The optical cable 19 passes through the fiber optic grating 18 and contacts the fiber optic grating 18. The two ends of the optical cable 19 are clamped by the clamping component 20 and then encapsulated by the encapsulation component 21. The optical cable 19 is used to connect to an external signal receiving device.

[0035] In the above embodiments, preferably, as follows: Figure 5 and Figure 6 As shown, the bottom of the fixing plate 5 has a groove 16, and the bottom of the base 15 of the force measuring unit 6 has a through hole 17; the optical cable 19 passes through the through hole 17 and is accommodated in the groove 16, and then passes out along the groove 16.

[0036] In the above embodiments, preferably, as follows: Figure 1 As shown, the present invention also includes a cover plate 1, which is a shell structure. The cover plate 1 is placed on the fixed plate 5 to accommodate a plurality of force measuring units 6 inside the cover plate 1.

[0037] In the above embodiments, preferably, as follows: Figure 2As shown, the present invention also includes hinges 4, with two hinges 4 respectively disposed at both ends of the base plate 2. The hinges 4 are used to fix the pressure measuring device to the offshore platform leg (not shown in the figure).

[0038] In the above embodiment, preferably, cover plate slots 3 are provided on both sides of the cover plate 1 corresponding to the hinge 4, so that when the cover plate is closed, the two ends of the hinge extend out from the cover plate slots.

[0039] It should be noted that in this invention, the pressure plate 7 needs to be in contact with the cover plate 1. When the ice force does not act on the center of the pressure plate, it will tilt. However, since the upper cover plate generates a reaction force at its central symmetrical position, the pressure plate is prevented from tilting and only moves vertically downward, ensuring that the measured ice force is in the vertical direction, rather than its component force.

[0040] The gaps between several force measuring units are separated by a suitable filling material, so that the pressure measuring units can function independently in low-temperature freezing environments.

[0041] This invention measures individual ice pressure using each individual force measuring unit, and the sum of the forces measured by several force measuring units is the overall ice pressure.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distributed ice pressure measuring device, characterized in that, include: Base plate; A fixing plate is disposed on the base plate, and a plurality of the fixing plates are distributed along the width direction of the base plate, and each fixing plate extends along the length direction of the base plate; A force measuring unit is disposed on the fixed plate, and several force measuring units are distributed along the length direction of the fixed plate. The force measuring unit is used to measure ice pressure and transmit pressure signals. The force measuring unit includes: a pressure plate, a force transmission rod, a ball head, an upper cover, an upper support, a positioning pin, a cantilever beam, a lower support, and a base; The base is a shell structure with an open top, which is fixedly mounted on the fixing plate; The lower support is fixedly mounted on the base plate inside the base; The first end of the cantilever beam is fixedly connected to the lower support, and the second end of the beam has a protruding part with a spherical groove provided on the protruding part. The upper support is fitted onto the protrusion at the second end of the cantilever beam; The upper cover is closed and fixedly installed at the upper opening of the base; The pressure plate is positioned above the upper cover; The first end of the force transmission rod extends into the pressure plate and is interference-fitted with the pressure plate, and the second end extends into the ball head and is interference-fitted with the ball head. After the ball-headed force transmission rod passes through the upper cover and the upper support in sequence, the ball head is accommodated in the spherical groove of the cantilever beam; The positioning pin passes through the side wall of the upper support and the side wall of the spherical groove in sequence and then presses against the ball head.

2. The distributed ice pressure measuring device according to claim 1, characterized in that, The cantilever beam is equipped with a signal transmission component for transmitting the detected pressure signal.

3. The distributed ice pressure measuring device according to claim 2, characterized in that, The signal transmission component includes a fiber optic grating, an optical cable, a clamping component, and an encapsulation component; The fiber grating is disposed inside the cantilever beam or on one side wall. The optical cable passes through the fiber grating and contacts the fiber grating. The two ends of the optical cable are clamped by clamping components and then encapsulated by encapsulation components. The optical cable is used to connect to an external signal receiving device.

4. The distributed ice pressure measuring device according to claim 3, characterized in that, The bottom of the fixing plate is provided with a groove, and the bottom of the base of the force measuring unit is provided with a through hole; The optical cable passes through the through hole and is accommodated in the groove, and then exits along the groove.

5. The distributed ice pressure measuring device according to claim 1, characterized in that, It also includes a cover plate, which is a shell structure, and is placed on the fixed plate to accommodate several of the force measuring units inside the cover plate.

6. The distributed ice pressure measuring device according to claim 5, characterized in that, It also includes hinges, with two hinges respectively located at both ends of the base plate, the hinges being used to fix the pressure measuring device to the offshore platform leg.

7. The distributed ice pressure measuring device according to claim 6, characterized in that, The cover plate corresponding to the hinge has cover plate slots on both sides, so that when the cover plate is closed, the two ends of the hinge extend out from the cover plate slots.

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