Sandwich type flexible capacitive pressure sensor
By designing a sandwich-style structure in a flexible pressure sensor and limiting the connecting wires with the airbag ring, the problem of the connecting wires being easily fall off or disconnected during the pressure measurement process is solved, achieving more stable line contact and more accurate measurement results.
Patent Information
- Application Number
- CN202411957887.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the repeated pressure measurement process of the flexible pressure sensor, the connecting wire is easily shaken and fall off or disconnected, resulting in poor line contact and affecting the measurement accuracy.
A sandwich-type flexible capacitive pressure sensor is designed. By setting a fixed sleeve, the first pipe and the airbag ring, the connecting wire is limited by the expansion of the airbag ring to ensure a stable connection between the connecting wire and the coupling end.
It effectively prevents the connecting line from falling off or disconnecting during pressure measurement, ensures stable contact of the line, and improves the accuracy and reliability of measurement.
Smart Images
Figure CN119674626A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pressure sensors, in particular to a sandwich-type flexible capacitive pressure sensor. Background Art
[0002] Flexible electronics is an emerging technology. In people's impression, organic materials, such as plastics, are good insulators, and few people would think that plastics can also conduct electricity. In recent years, due to new breakthroughs in the research of conductive polymers, organic materials can be transformed from traditional insulators into conductive semiconductors, and flexible electronics came into being. The development of modern chemistry and other technologies has promoted the development of a discipline such as flexible electronics. The key to flexible electronics manufacturing includes manufacturing processes, substrates and materials, etc. Its core is micro-nano patterning (Micro-and Nanopatterning) manufacturing, which involves multidisciplinary cross-research such as mechanics, materials, physics, chemistry, and electronics. In the process of pressure measurement of flexible pressure sensors, the connecting wires connected to the flexible pressure sensors are prone to shaking and falling off or even disconnecting during repeated pressure measurements, resulting in poor contact between the connecting wires and the lines connected to the flexible pressure sensors. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention provides a sandwich-type flexible capacitive pressure sensor, which solves the problems raised in the above-mentioned background technology.
[0004] To achieve the above purpose, the present invention is implemented by the following technical scheme: a sandwich-type flexible capacitive pressure sensor, comprising a photoresist layer and a fixing tube, a flexible base layer is arranged on the surface of the photoresist layer, a lower metal electrode layer is arranged on the surface of the flexible base layer, a flexible dielectric layer is arranged on the surface of the lower metal electrode layer, an upper metal electrode layer is arranged on the surface of the flexible dielectric layer, a waterproof packaging layer is arranged on the outer side of the upper metal electrode layer and the photoresist layer, a power-on coil is arranged inside the waterproof packaging layer, a connecting end is arranged at one end of the flexible base layer, one end of the connecting end extends to the outer side of the waterproof packaging layer and is fixedly connected to a connecting end head, a connecting wire is plugged inside the connecting end head, an installation sleeve is arranged on the outer fixed sleeve of the connecting end head, a limiting sleeve is placed on one side of the installation sleeve, a fixing sleeve is fixedly connected to the inner side of the limiting sleeve, an insertion groove is opened inside the fixing sleeve and located on the outer side of the connecting wire, an airbag ring is fixedly connected inside the insertion groove and located on the outer side of the connecting wire, a power supply detector is installed inside the waterproof packaging layer, and the power supply detector is electrically connected to the power-on coil.
[0005] Optionally, a second driving groove is provided inside the limiting sleeve, a first pressure block is slidably connected inside the second driving groove, a first threaded rod is rotatably connected to the top of the first pressure block, the top of the first threaded rod extends to the outside of the limiting sleeve and is fixedly connected to a first rotating disk, a first threaded groove matching the first threaded rod is provided inside the limiting sleeve and located on the outside of the first threaded rod, a first airbag is fixedly connected to the bottom of the inner cavity of the second driving groove, the bottom end of the first pressure block is fixedly connected to the top of the first airbag, a first pipe is fixedly connected to the inside of the limiting sleeve, one end of the first pipe extends to the inside of the first airbag, and the other end of the first pipe extends to the inside of the airbag ring.
[0006] Optionally, a plurality of slots are provided on one side of the limiting sleeve, plug blocks are placed inside the slots, and one end of the plug blocks is fixedly connected to one side of the mounting sleeve.
[0007] Optionally, a fixing groove is opened inside the limiting sleeve and on one side of the slot, a third airbag is fixedly connected to one side of the inner cavity of the fixing groove, one end of the third airbag is fixedly connected to a plug, and one end of the plug extends into the inside of the plug block.
[0008] Optionally, an annular air cavity is opened inside the limiting sleeve and on the inner side of the fixing groove, and a third pipe is fixedly connected inside the limiting sleeve and between the annular air cavity and the fixing groove, one end of the third pipe extends to the inside of the third airbag, and the other end of the third pipe extends to the inside of the annular air cavity.
[0009] Optionally, a first driving groove is defined inside the limiting sleeve, a second threaded groove is defined at the bottom of the limiting sleeve, a second threaded rod is threadedly connected inside the second threaded groove, one end of the second threaded rod extends to the outside of the limiting sleeve and is fixedly connected to the second rotating disk, the other end of the second threaded rod extends into the first driving groove and is connected to a second pressure block through a shaft sleeve, a second airbag is fixedly connected to the top of the inner cavity of the first driving groove, the top of the second pressure block is fixedly connected to the bottom of the second airbag, a second pipe is fixedly connected inside the limiting sleeve and above the first driving groove, one end of the second pipe extends to the inside of the annular air cavity, and the other end of the second pipe extends to the inside of the second airbag.
[0010] Optionally, a first rectangular groove is formed at one end of the second rotating disk and one end of the first rotating disk.
[0011] Optionally, a screw rod is rotatably connected to the inner cavity of the fixed cylinder, and a moving block is threadedly connected to the outer side of the screw rod, the bottom end of the screw rod extends to the bottom of the fixed cylinder and is fixedly connected to a rotating column, two mounting blocks are fixedly connected to one side of the inner cavity of the fixed cylinder, the bottom of one mounting block is fixedly connected to a first trigger switch valve, and the top of the other mounting block is fixedly connected to a second trigger switch, a sliding groove is provided on the inner wall of the fixed cylinder, one end of the moving block extends to the inside of the sliding groove and is slidably connected to the inside of the sliding groove, the top of the fixed cylinder is fixedly connected to a top cover, the inside of the top cover is fixedly connected to a servo motor, the output end of the servo motor is fixedly connected to the top end of the screw rod, the top of the top cover is fixedly connected to a display light, and the bottom end of the rotating column is fixedly connected to a rectangular block, and the rectangular block cooperates with the first rectangular groove.
[0012] The present invention provides a sandwich-type flexible capacitive pressure sensor, which has the following beneficial effects: 1. The sandwich-type flexible capacitive pressure sensor is provided with a fixed sleeve, a first pipe and an airbag ring. The first rotating disk can be twisted and moved by a tool, and then the gas inside the first airbag is input into the airbag ring through the first pipe, so that the airbag ring expands, the connecting line is limited, and the connection between the connecting line and the connecting end is limited.
[0013] 2. The sandwich-type flexible capacitive pressure sensor is provided with a third airbag, a plug-in column and a plug-in block. When the limit sleeve needs to be replaced, the operator aligns the rotating column with the first rectangular groove on the second rotating disk, and then inserts the rectangular block into the first rectangular groove. Then, the output end of the servo motor drives the screw to rotate, so that the screw drives the rotating column to drive the rectangular block and the second rotating disk, the second threaded rod and the second pressure block to move downward, so that the second pressure block drives the second airbag to move, so that the gas inside the third airbag is sucked into the annular air cavity through the third pipe, and the gas inside the annular air cavity is sucked into the second airbag through the second pipe, so that the third airbag contracts. At this time, the third airbag drives one end of the plug-in column to move out of the plug-in block, and the limit of the limit sleeve and the fixing sleeve is released. The limit sleeve and the fixing sleeve can be replaced, so as to reduce the use cost of the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the waterproof packaging layer of the present invention; Figure 3 It is a schematic diagram of the side view structure of the limit sleeve of the present invention; Figure 4 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention; Figure 5 For the present invention Figure 1A magnified image of point A; Figure 6 For the present invention Figure 1 Enlarged view of point B.
[0015] In the figure: 1, photoresist layer; 2, lower metal electrode layer; 3, upper metal electrode layer; 4, flexible dielectric layer; 5, connecting end; 6, connecting end; 7, fixing sleeve; 8, connecting wire; 9, inserting groove; 10, airbag ring; 11, first thread groove; 12, first rotating disk; 13, first threaded rod; 14, first pressing block; 15, waterproof packaging layer; 16, first airbag; 17, first pipeline; 18, first driving groove; 19, second pressing block; 20, second airbag; 21, second threaded rod; 22, second thread groove; 23, energized coil; 24, second rotating disk Moving disk; 25, first rectangular groove; 26, fixed groove; 27, third airbag; 28, annular air cavity; 29, second pipeline; 30, third pipeline; 31, plug column; 32, mounting sleeve; 33, slot; 34, plug block; 35, fixed cylinder; 36, screw rod; 37, moving block; 38, rotating column; 39, mounting block; 40, first trigger switch valve; 41, second trigger switch; 42, slide groove; 43, top cover; 44, servo motor; 45, display light; 46, power supply detector; 47, limit sleeve; 48, second drive groove; 50, flexible base layer. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0017] Embodiment 1 See also Figures 1 to 6The present invention provides a technical solution: a sandwich-type flexible capacitive pressure sensor, comprising a photoresist layer 1 and a fixing tube 35, a flexible base layer 50 is arranged on the surface of the photoresist layer 1, a lower metal electrode layer 2 is arranged on the surface of the flexible base layer 50, a flexible dielectric layer 4 is arranged on the surface of the lower metal electrode layer 2, an upper metal electrode layer 3 is arranged on the surface of the flexible dielectric layer 4, a waterproof packaging layer 15 is arranged on the outer side of the upper metal electrode layer 3 and the photoresist layer 1, a power-carrying coil 23 is arranged inside the waterproof packaging layer 15, a connection end 5 is arranged at one end of the flexible base layer 50, and a connection end 5 is arranged at one end of the flexible base layer 50. One end of the end 5 extends to the outside of the waterproof packaging layer 15 and is fixedly connected to the connecting terminal 6, the connecting terminal 6 is plugged with a connecting wire 8, the outer fixed sleeve of the connecting terminal 6 is provided with a mounting sleeve 32, a limiting sleeve 47 is placed on one side of the mounting sleeve 32, the inner side of the limiting sleeve 47 is fixedly connected with a fixing sleeve 7, an insertion groove 9 is provided inside the fixing sleeve 7 and located on the outside of the connecting wire 8, an airbag ring 10 is fixedly connected inside the insertion groove 9 and located on the outside of the connecting wire 8, a power supply detector 46 is installed inside the waterproof packaging layer 15, and the power supply detector 46 is electrically connected to the energized coil 23.
[0018] A second driving groove 48 is provided inside the limiting sleeve 47, and a first pressing block 14 is slidably connected inside the second driving groove 48. The top of the first pressing block 14 is rotatably connected to the first threaded rod 13, and the top of the first threaded rod 13 extends to the outside of the limiting sleeve 47 and is fixedly connected to the first rotating disk 12. A first threaded groove 11 matching the first threaded rod 13 is provided inside the limiting sleeve 47 and located on the outside of the first threaded rod 13. The bottom of the inner cavity of the second driving groove 48 is fixedly connected to the first airbag 16, and the bottom end of the first pressing block 14 is fixedly connected to the top of the first airbag 16. A first pipe 17 is fixedly connected inside the limiting sleeve 47, and one end of the first pipe 17 extends to the inside of the first airbag 16, and the other end of the first pipe 17 extends to the inside of the airbag ring 10. Gas can be input into the inside of the airbag ring 10 through the first pipe 17, and the gas inside the airbag ring 10 can also be sucked into the inside of the first airbag 16 through the first pipe 17.
[0019] A plurality of slots 33 are provided on one side of the limiting sleeve 47 , and insert blocks 34 are placed inside the slots 33 . One end of the insert blocks 34 is fixedly connected to one side of the mounting sleeve 32 . The limiting sleeve 47 and the fixing sleeve 7 are limited by the insert blocks 34 and the mounting sleeve 32 .
[0020] A fixing groove 26 is provided inside the limiting sleeve 47 and on one side of the slot 33. A third airbag 27 is fixedly connected to one side of the inner cavity of the fixing groove 26. An insert column 31 is fixedly connected to one end of the third airbag 27. One end of the insert column 31 extends to the inside of the insert block 34. The limiting sleeve 47 and the fixing sleeve 7 are limited by the insert column 31 and the insert block 34.
[0021] An annular air cavity 28 is provided inside the limiting sleeve 47 and on the inner side of the fixing groove 26. A third pipe 30 is fixedly connected inside the limiting sleeve 47 and between the annular air cavity 28 and the fixing groove 26. One end of the third pipe 30 extends to the inside of the third airbag 27, and the other end of the third pipe 30 extends to the inside of the annular air cavity 28. Gas can be input into the third airbag 27 or the gas inside the third airbag 27 can be extracted through the third pipe 30 and the annular air cavity 28.
[0022] A first driving groove 18 is provided inside the limiting sleeve 47, and a second threaded groove 22 is provided at the bottom of the limiting sleeve 47. A second threaded rod 21 is threadedly connected inside the second threaded groove 22. One end of the second threaded rod 21 extends to the outside of the limiting sleeve 47 and is fixedly connected to the second rotating disk 24. The other end of the second threaded rod 21 extends to the inside of the first driving groove 18 and is connected to the second pressing block 19 through a shaft sleeve. The top of the inner cavity of the first driving groove 18 is fixedly connected to the second airbag 20, and the top of the second pressing block 19 is fixedly connected to the bottom of the second airbag 20. A second pipe 29 is fixedly connected inside the limiting sleeve 47 and located above the first driving groove 18. One end of the second pipe 29 extends to the inside of the annular air cavity 28, and the other end of the second pipe 29 extends to the inside of the second airbag 20. Gas can be input into the third airbag 27 through the second pipe 29, and the gas inside the third airbag 27 can also be drawn into the second pipe 29 and the second airbag 20.
[0023] A first rectangular groove 25 is formed at one end of the second rotating disk 24 and the first rotating disk 12 so as to enable the second rotating disk 24 and the first rotating disk 12 to rotate.
[0024] Embodiment 2 See also Figure 1 and Figure 4 The present invention provides a technical solution: the inner cavity of the fixed cylinder 35 is rotatably connected with a screw rod 36, the outer side of the screw rod 36 is threadedly connected with a moving block 37, the bottom end of the screw rod 36 extends to the bottom of the fixed cylinder 35 and is fixedly connected with a rotating column 38, one side of the inner cavity of the fixed cylinder 35 is fixedly connected with two mounting blocks 39, the bottom of one mounting block 39 is fixedly connected with a first trigger switch valve 40, and the top of the other mounting block 39 is fixedly connected with a second trigger switch 41, the inner wall of the fixed cylinder 35 is provided with a slide groove 42, and the movable block 37 is fixedly connected with a first trigger switch valve 40. One end extends to the inside of the slide groove 42 and is slidably connected to the inside of the slide groove 42, a top cover 43 is fixedly connected to the top of the fixed cylinder 35, a servo motor 44 is fixedly connected to the inside of the top cover 43, the output end of the servo motor 44 is fixedly connected to the top of the screw rod 36, a display light 45 is fixedly connected to the top of the top cover 43, a rectangular block is fixedly connected to the bottom end of the rotating column 38, and the rectangular block cooperates with the first rectangular groove 25, the first trigger switch valve 40 and the second trigger switch 41 respectively control the display light 45 to light up lights of different colors.
[0025] In summary, when the sandwich-type flexible capacitive pressure sensor is in use, when the waterproof packaging layer 15 is damaged, the waterproof packaging layer 15 is punctured, causing the circuit loop between the power supply detector 46 and the energized coil 23 to be affected. At this time, it can be identified that the waterproof packaging layer 15 is damaged. After inserting the connecting wire 8 into the connecting end 6, the operator aligns the rotating column 38 with the first rectangular groove 25 on the first rotating disk 12, inserts the rectangular block on the rotating column 38 into the first rectangular groove 25, and then presses the control button on the fixed cylinder 35. At this time, the servo motor 44 drives the screw rod 36 to rotate, so that the screw rod 36 drives the rotating column 38 to rotate, so that the rotating column 38 drives the first rotating disk 12 through the rectangular block and the first rectangular groove 25. The movable plate 12 and the first threaded rod 13 rotate and move, so that the first threaded rod 13 pushes the first pressure block 14 to squeeze the first airbag 16, so that the gas inside the first airbag 16 enters the airbag ring 10 through the first pipe 17, so that the airbag ring 10 expands and limits the connecting line 8. When the movable block 37 triggers the first trigger switch valve 40, the display light 45 lights up to remind the staff that the installation is complete. When it is necessary to take out the connecting line 8, the operator starts the servo motor 44 according to the above steps to drive the screw rod 36 to drive the rotating column 38 and the rectangular block to reset and rotate, so that the rectangular block drives the first rotating plate 12 to reset and rotate through the first rectangular groove 25, so that the first rotating plate 12 drives the first threaded rod 13 to reset and rotate, so that the first threaded The rod 13 drives the first pressing block 14 to reset and move, so that the gas inside the airbag ring 10 is sucked into the first airbag 16 through the first pipe 17, so that the airbag ring 10 shrinks, the limit on the connecting line 8 is released, and the connecting line 8 is pulled out from the inside of the connecting end 6. The screw rod 36 rotates to drive the moving block 37 to reset and move, so that the moving block 37 triggers the second trigger switch 41. At this time, the display light 45 lights up, prompting the operator to pull out the connecting line 8 from the inside of the connecting end 6. When the limit sleeve 47 needs to be replaced, the operator aligns the rotating column 38 with the first rectangular groove 25 on the second rotating disk 24, and then inserts the rectangular block into the first rectangular groove 25. Then the output end of the servo motor 44 drives the screw rod 36 to rotate, so that the screw rod 36 drives the rotating column 38 to drive the rectangular block and the second rotating disk 24, the second threaded rod 21 and the second pressing block 19 to move downward, so that the second pressing block 19 drives the second airbag 20 to move, so that the gas inside the third airbag 27 is sucked into the annular air cavity 28 through the third pipe 30, and the gas inside the annular air cavity 28 is sucked into the second airbag 20 through the second pipe 29, so that the third airbag 27 shrinks. At this time, the third airbag 27 drives one end of the plug column 31 to move out of the plug block 34, and the limit sleeve 47 and the fixing sleeve 7 are released. The limit sleeve 47 and the fixing sleeve 7 are removed from one side of the connecting end 6. At this time, the screw rod 36 drives the moving block 37 to move, so that the moving block 37 triggers the first trigger switch valve 40, and the display light 45 lights up.The operator aligns the rotating column 38 with the first rectangular groove 25 on the second rotating disk 24, and then inserts the rectangular block into the first rectangular groove 25. Then, the servo motor 44 drives the screw rod 36 to reset and rotate, so that the screw rod 36 drives the rotating column 38 to reset and rotate, so that the rotating column 38 drives the second rotating disk 24 and the second threaded rod 21 to reset and rotate through the rectangular block and the first rectangular groove 25, so that the second threaded rod 21 drives the second pressing block 19 to move, so that the second pressing block 19 squeezes the second airbag 20, and the gas inside the second airbag 20 is released. It is discharged into the second pipe 29, then enters the annular air cavity 28 through the second pipe 29, then enters the third pipe 30 through the annular air cavity 28, and then enters the third airbag 27 through the third pipe 30, so that the third airbag 27 pushes the plug 31 to move, so that one end of the plug 31 is inserted into the plug block 34, and the limit sleeve 47 and the fixed sleeve 7 are installed. At the same time, the screw rod 36 rotates to drive the moving block 37 to reset and move, so that the moving block 37 triggers the second trigger switch 41, and the display light 45 lights up.
[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A sandwich-type flexible capacitive pressure sensor, comprising a photoresist layer (1) and a fixing tube (35), characterized in that: A flexible base layer (50) is provided on the surface of the photoresist layer (1), a lower metal electrode layer (2) is provided on the surface of the flexible base layer (50), a flexible dielectric layer (4) is provided on the surface of the lower metal electrode layer (2), an upper metal electrode layer (3) is provided on the surface of the flexible dielectric layer (4), a waterproof packaging layer (15) is provided on the outer sides of the upper metal electrode layer (3) and the photoresist layer (1), a power-carrying coil (23) is provided inside the waterproof packaging layer (15), and a connecting end (5) is provided at one end of the flexible base layer (50), one end of the connecting end (5) extends to the outer side of the waterproof packaging layer (15) and is fixedly connected to the A connecting end (6), wherein a connecting wire (8) is inserted inside the connecting end (6), a mounting sleeve (32) is provided on the outer fixed sleeve of the connecting end (6), a limiting sleeve (47) is placed on one side of the mounting sleeve (32), a fixing sleeve (7) is fixedly connected to the inner side of the limiting sleeve (47), an insertion groove (9) is provided inside the fixing sleeve (7) and located outside the connecting wire (8), an airbag ring (10) is fixedly connected inside the insertion groove (9) and located outside the connecting wire (8), and a power supply detector (46) is installed inside the waterproof packaging layer (15), and the power supply detector (46) is electrically connected to the energized coil (23).
2. A sandwich-type flexible capacitive pressure sensor according to claim 1, characterized in that: A second driving groove (48) is provided inside the limiting sleeve (47), a first pressing block (14) is slidably connected inside the second driving groove (48), a first threaded rod (13) is rotatably connected to the top of the first pressing block (14), a top of the first threaded rod (13) extends to the outside of the limiting sleeve (47) and is fixedly connected to the first rotating disk (12), a first threaded groove (11) matching with the first threaded rod (13) is provided inside the limiting sleeve (47) and located on the outside of the first threaded rod (13), a first airbag (16) is fixedly connected to the bottom of the inner cavity of the second driving groove (48), the bottom end of the first pressing block (14) is fixedly connected to the top of the first airbag (16), a first pipe (17) is fixedly connected inside the limiting sleeve (47), one end of the first pipe (17) extends to the inside of the first airbag (16), and the other end of the first pipe (17) extends to the inside of the airbag ring (10).
3. A sandwich-type flexible capacitive pressure sensor according to claim 2, characterized in that: A plurality of slots (33) are provided on one side of the limiting sleeve (47), and insert blocks (34) are placed inside the slots (33). One end of the insert blocks (34) is fixedly connected to one side of the installation sleeve (32).
4. The sandwich-type flexible capacitive pressure sensor according to claim 3, characterized in that: A fixing groove (26) is provided inside the limiting sleeve (47) and on one side of the slot (33); a third airbag (27) is fixedly connected to one side of the inner cavity of the fixing groove (26); an insertion column (31) is fixedly connected to one end of the third airbag (27); and one end of the insertion column (31) extends into the interior of the insertion block (34).
5. The sandwich-type flexible capacitive pressure sensor according to claim 4, characterized in that: An annular air cavity (28) is provided inside the limiting sleeve (47) and located on the inner side of the fixing groove (26); a third pipe (30) is fixedly connected inside the limiting sleeve (47) and located between the annular air cavity (28) and the fixing groove (26); one end of the third pipe (30) extends into the third airbag (27), and the other end of the third pipe (30) extends into the annular air cavity (28).
6. The sandwich-type flexible capacitive pressure sensor according to claim 5, characterized in that: The limiting sleeve (47) has a first driving groove (18) formed inside, and a second threaded groove (22) formed at the bottom of the limiting sleeve (47). A second threaded rod (21) is threadedly connected inside the second threaded groove (22). One end of the second threaded rod (21) extends to the outside of the limiting sleeve (47) and is fixedly connected to a second rotating disk (24). The other end of the second threaded rod (21) extends to the inside of the first driving groove (18) and is connected to a second pressing block (19) via a shaft sleeve. A second airbag (20) is fixedly connected to the top of the inner cavity of the first driving groove (18). The top of the second pressing block (19) is fixedly connected to the bottom of the second airbag (20). A second pipe (29) is fixedly connected inside the limiting sleeve (47) and located above the first driving groove (18). One end of the second pipe (29) extends to the inside of the annular air cavity (28), and the other end of the second pipe (29) extends to the inside of the second airbag (20).
7. The sandwich-type flexible capacitive pressure sensor according to claim 6, characterized in that: One end of each of the second rotating disk (24) and the first rotating disk (12) is provided with a first rectangular groove (25).
8. The sandwich-type flexible capacitive pressure sensor according to claim 1, characterized in that: The inner cavity of the fixed cylinder (35) is rotatably connected to a screw rod (36), the outer side of the screw rod (36) is threadedly connected to a moving block (37), the bottom end of the screw rod (36) extends to the bottom of the fixed cylinder (35) and is fixedly connected to a rotating column (38), one side of the inner cavity of the fixed cylinder (35) is fixedly connected to two mounting blocks (39), the bottom of one mounting block (39) is fixedly connected to a first trigger switch valve (40), and the top of the other mounting block (39) is fixedly connected to a second trigger switch (41), and the inner wall of the fixed cylinder (35) is opened. A slide groove (42) is provided, one end of the moving block (37) extends into the slide groove (42) and is slidably connected to the inside of the slide groove (42), a top cover (43) is fixedly connected to the top of the fixed cylinder (35), a servo motor (44) is fixedly connected to the inside of the top cover (43), an output end of the servo motor (44) is fixedly connected to the top of the screw rod (36), a display light (45) is fixedly connected to the top of the top cover (43), and a rectangular block is fixedly connected to the bottom end of the rotating column (38), and the rectangular block matches the first rectangular groove (25).
Citation Information
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