A magnetorheological pressure sensing device based on a wedge-shaped structure

Abstract

The present invention relates to a magnetorheological pressure sensing device based on a wedge-shaped structure. The device is composed of a housing, a wedge-shaped cone, a piston rod, a first electrode plate, a second electrode plate, a third electrode plate, a fourth electrode plate, a fifth electrode plate, a sixth electrode plate, an end cap, a first spring, a controller housing, a controller, a second spring, a power supply wire, a signal wire, a third elastomer, a second elastomer, a first elastomer, an excitation coil, and a sealing ring. The wedge-shaped cone is placed at the inner center of the housing and sealed with a sealing ring; the first electrode plate, the third electrode plate, and the fifth electrode plate are closely attached to the side surface of the piston rod; the second electrode plate, the fourth electrode plate, and the sixth electrode plate are embedded in the housing and placed on the side surface of the piston rod; the first elastomer, the second elastomer, and the third elastomer are respectively placed in the recesses of the piston rod; the controller is placed in the controller housing, and its output end is connected with a signal wire and a power supply wire; the second spring is placed at the bottom of the wedge-shaped cone.

Description

Technical Field

[0001] The present invention relates to a pressure sensing device, and particularly to a magnetorheological pressure sensing device based on a wedge-shaped structure. Background Art

[0002] With the development of underwater detection technology, underwater pressure sensing devices are widely used in submarines and underwater robots. However, as the underwater detection depth becomes deeper and deeper, the seabed water pressure has exceeded the measurement range of ordinary pressure sensors, and there is an urgent need for an underwater pressure sensing device with a wider measurement range. Therefore, the present invention designs a magnetorheological pressure sensing device based on a wedge-shaped structure by combining the variable magnetic stiffness and piezoresistive characteristics of magnetorheological elastomers. Summary of the Invention

[0003] The purpose of the present invention is to provide a magnetorheological pressure sensing device based on a wedge-shaped structure, which can not only measure the pressure of the seabed, but also measure the change process of seawater pressure.

[0004] In order to effectively solve the above problems, the present invention is implemented as follows: The device consists of a housing 1, a wedge cone 2, a piston rod 3, a first electrode plate 4, a second electrode plate 5, a third electrode plate 6, a fourth electrode plate 7, a fifth electrode plate 8, a sixth electrode plate 9, an end cover 10, a first spring 11, a controller housing 12, a controller 13, a second spring 14, a power-on wire 15, a signal wire 16, a third elastomer 17, a second elastomer 18, a first elastomer 19, an excitation coil 20, and a sealing ring 21. The wedge cone 2 is placed at the center of the interior of the housing 1 and sealed with the sealing ring 21; the piston rod 3 is horizontally placed inside the housing 1 and closely abuts against the wedge cone 2; the first electrode plate 4, the third electrode plate 6, and the fifth electrode plate 8 are closely attached to the side surface of the piston rod 3; the second electrode plate 5, the fourth electrode plate 7, and the sixth electrode plate 9 are embedded in the housing 1 and placed on the side surface of the piston rod 3; the first elastomer 19, the second elastomer 18, and the third elastomer 17 are respectively placed in the depressions of the piston rod 3; the end cover 10 is threadedly connected to the housing 1; the first spring 11 is placed between the end cover 10 and the piston rod 3; the controller housing 12 is placed at the bottom of the housing 1 and welded to the housing 1; the controller 13 is placed inside the controller housing 12, and its output end is connected to the signal wire 16 and the power-on wire 15; the second spring 14 is placed at the bottom of the wedge cone 2; the excitation coil 20 is wound inside the piston rod 3.

[0005] Both the interior and the surface of the housing 1 are insulated.

[0006] The materials of the first electrode plate 4, the second electrode plate 5, the third electrode plate 6, the fourth electrode plate 7, the fifth electrode plate 8, and the sixth electrode plate 9 are all copper.

[0007] The first elastomer 19, the second elastomer 18, and the third elastomer 17 are all pre-structured magnetorheological elastomers.

[0008] The surface of the piston rod 3 is insulated.

[0009] The positive effect of the magnetorheological pressure sensing device based on the wedge structure of the present invention is as follows: By measuring the piezoresistance value of the pre-structured magnetorheological elastomer to characterize the pressure and taking the average piezoresistance value of the measurement, the measured data is more accurate; Since there are four measurement directions, the seawater pressure is evenly divided into four parts, which can increase its pressure characterization range, so the seawater pressure at a deeper depth can be measured. Description of the Drawings

[0010] Figure 1 It is a top view of a magnetorheological pressure sensing device based on the wedge structure.

[0011] Figure 2 It is a schematic diagram of the internal structure of a magnetorheological pressure sensing device based on the wedge structure.

[0012] In the figure: 1. Outer shell, 2. Wedge cone, 3. Piston rod, 4. First electrode plate, 5. Second electrode plate, 6. Third electrode plate, 7. Fourth electrode plate, 8. Fifth electrode plate, 9. Sixth electrode plate, 10. End cover, 11. First spring, 12. Controller housing, 13. Controller, 14. Second spring, 15. Energizing wire, 16. Signal wire, 17. Third elastomer, 18. Second elastomer, 19. First elastomer, 20. Excitation coil, 21. Sealing ring.

[0013] The present invention will be described in detail below with reference to the accompanying drawings.

[0014] In Figure 2In this, a magnetorheological pressure sensing device based on a wedge-shaped structure of the present invention is composed of a housing 1, a wedge cone 2, a piston rod 3, a first electrode plate 4, a second electrode plate 5, a third electrode plate 6, a fourth electrode plate 7, a fifth electrode plate 8, a sixth electrode plate 9, an end cap 10, a first spring 11, a controller housing 12, a controller 13, a second spring 14, a power supply wire 15, a signal wire 16, a third elastomer 17, a second elastomer 18, a first elastomer 19, an excitation coil 20, and a sealing ring 21. The wedge cone 2 is placed at the center inside the housing 1 and sealed with the sealing ring 21; the piston rod 3 is horizontally placed inside the housing 1 and closely abuts against the wedge cone 2; the first electrode plate 4, the third electrode plate 6, and the fifth electrode plate 8 closely adhere to the side surface of the piston rod 3; the second electrode plate 5, the fourth electrode plate 7, and the sixth electrode plate 9 are embedded inside the housing 1 and placed on the side surface of the piston rod 3; the first elastomer 19, the second elastomer 18, and the third elastomer 17 are respectively placed in the recesses of the piston rod 3; the end cap 10 is threadedly connected to the housing 1; the first spring 11 is placed between the end cap 10 and the piston rod 3; the controller housing 12 is placed at the bottom of the housing 1 and welded to the housing 1; the controller 13 is placed inside the controller housing 12, and its output end is connected with the signal wire 16 and the power supply wire 15; the second spring 14 is placed at the bottom of the wedge cone 2; the excitation coil 20 is wound inside the piston rod 3.

[0015] Both the inside and the surface of the said housing 1 are insulated.

[0016] The materials of the said first electrode plate 4, second electrode plate 5, third electrode plate 6, fourth electrode plate 7, fifth electrode plate 8, and sixth electrode plate 9 are all copper.

[0017] The said first elastomer 19, second elastomer 18, and third elastomer 17 are all pre-structured magnetorheological elastomers.

[0018] The surface of the said piston rod 3 is insulated.

[0019] The working principle of a magnetorheological pressure sensing device based on a wedge-shaped structure of the present invention is as follows: When seawater enters from the top of the housing 1, the wedge cone 2 moves downward due to the pressure, squeezing the surrounding piston rod 3 to move horizontally. At this time, the controller 13 outputs current to the power supply wire 15, and the excitation coil 20 connected to the power supply wire 15 generates a magnetic field. The magnetic field changes, causing the stiffness of the first elastomer 19, the second elastomer 18, and the third elastomer 17 to change, so as to balance the pressure of the seawater. The piezoresistive mean values between the first electrode plate 4 and the second electrode plate 5, the third electrode plate 6 and the fourth electrode plate 7, and the fifth electrode plate 8 and the sixth electrode plate 9 in a single direction are measured through the signal wire 16. By combining the piezoresistive mean values in the other three aspects and taking the piezoresistive mean values in four directions, the magnitude of the seawater pressure is finally calibrated.

Claims

1. A magnetorheological pressure sensing device based on a wedge-shaped structure. The device consists of a housing (1), a wedge cone (2), a piston rod (3), a first electrode plate (4), a second electrode plate (5), a third electrode plate (6), a fourth electrode plate (7), a fifth electrode plate (8), a sixth electrode plate (9), an end cap (10), a first spring (11), a controller housing (12), a controller (13), a second spring (14), a power-on wire (15), a signal wire (16), a third elastomer (17), a second elastomer (18), a first elastomer (19), an excitation coil (20), and a sealing ring (21); the wedge cone (2) is placed at the center inside the housing (1) and sealed with the sealing ring (21); the piston rod (3) is horizontally placed inside the housing (1) and closely abuts against the wedge cone (2); the first electrode plate (4), the third electrode plate (6), and the fifth electrode plate (8) closely adhere to the side surface of the piston rod (3); the second electrode plate (5), the fourth electrode plate (7), and the sixth electrode plate (9) are embedded inside the housing (1) and placed on the side surface of the piston rod (3); the first elastomer (19), the second elastomer (18), and the third elastomer (17) are respectively placed in the recesses of the piston rod (3); the end cap (10) is threadedly connected to the housing (1); the first spring (11) is placed between the end cap (10) and the piston rod (3); the controller housing (12) is placed at the bottom of the housing (1) and welded to the housing (1); the controller (13) is placed inside the controller housing (12), and its output end is connected with the signal wire (16) and the power-on wire (15); the second spring (14) is placed at the bottom of the wedge cone (2); the excitation coil (20) is wound inside the piston rod (3); the surface of the piston rod (3) is insulated; the top of the housing (1) is a seawater inlet to squeeze the wedge cone (2) to move downward, and the wedge cone (2) squeezes the surrounding piston rod (3) to move horizontally; The first elastomer (19), the second elastomer (18), and the third elastomer (17) are all pre-structured magnetorheological elastomers.

2. The magnetorheological pressure sensing device based on a wedge-shaped structure according to claim 1, characterized in that: The inside and surface of the housing (1) are both insulated.

3. The magnetorheological pressure sensing device based on a wedge-shaped structure according to claim 1, characterized in that: The materials of the first electrode plate (4), the second electrode plate (5), the third electrode plate (6), the fourth electrode plate (7), the fifth electrode plate (8), and the sixth electrode plate (9) are all copper.

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