Ceramic pressure sensor shell with self-calibration function

Abstract

The utility model relates to the technical field of sensors, and discloses a ceramic pressure sensor shell with a self-calibration function, which comprises a shell, the inner wall of the shell is fixedly connected with a concave pad, the inner wall of the shell is fixedly connected with a plurality of first contraction columns, the exteriors of the plurality of first contraction columns are respectively sleeved with a first spring, and a second spring is fixedly connected with the concave pad. First movable pads are fixedly connected to the ends, far away from each other, of the first telescopic columns, a baffle is fixedly connected to the top ends of the first movable pads, a plurality of second telescopic columns are fixedly connected to the bottom end of the inner wall of the shell, and second springs are arranged outside the second telescopic columns in a sleeving mode respectively. According to the utility model, the problem of insufficient sealing performance of the ceramic pressure sensor shell is effectively solved, the measurement precision and stability of the sensor are improved, and a solid foundation is laid for wide application of the ceramic pressure sensor shell in the fields of industrial production, medical equipment, aerospace and the like which have extremely strict requirements on the performance of the sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a ceramic pressure sensor housing with self-calibration function. Background Technology

[0002] The ceramic pressure sensor housing is a structural component made of high-strength ceramic material, typically cylindrical with one end closed and the other open. It primarily encapsulates and protects the internal components of the ceramic pressure sensor, providing physical protection for the pressure-sensitive element, calibration circuit, microprocessor, etc., preventing them from external mechanical impacts, chemical corrosion, and interference from dust, moisture, and other impurities. Simultaneously, the housing also serves as a pressure transmission point, accurately transmitting external pressure to the pressure-sensitive element. Furthermore, it achieves self-calibration through an integrated calibration area, improving the accuracy and stability of pressure measurements. It is widely used in industrial production, aerospace, medical equipment, scientific research, and other fields with stringent requirements for pressure measurement accuracy.

[0003] When the ceramic pressure sensor housing is in operation, it utilizes the excellent piezoelectric or piezoresistive effect of ceramic materials. When external pressure is applied to the housing, the pressure is transmitted through the housing to the internal ceramic sensitive element, causing the ceramic sensitive element to generate a corresponding change in charge or resistance. This change is converted into an electrical signal by a conversion circuit, and then amplified and processed by the circuit in the housing, finally outputting a standard electrical signal proportional to the pressure, thereby realizing accurate measurement and monitoring of pressure.

[0004] However, some existing ceramic pressure sensor housings suffer from insufficient sealing at the connection points during use. Since sensors typically operate in complex environments, such as high temperature, high pressure, high humidity, or corrosive media, poor sealing at the housing connections allows external moisture, corrosive gases, or other impurities to easily penetrate. This not only interferes with the normal operation of the sensor's internal precision components, causing measurement data deviations and reducing measurement accuracy, but also, over time, can cause irreversible damage to the sensitive elements, significantly shortening the sensor's lifespan and severely impacting its reliable application in fields with extremely high requirements for measurement accuracy and stability, such as industrial production, medical equipment, and aerospace. Therefore, a ceramic pressure sensor housing with self-calibration function is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a ceramic pressure sensor housing with self-calibration function, aiming to improve the problem of insufficient sealing of ceramic pressure sensor housings in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a ceramic pressure sensor housing with self-calibration function, comprising an outer shell, a concave pad fixedly connected to the inner wall of the outer shell, a plurality of contraction columns I fixedly connected to the inner wall of the outer shell, a spring I respectively sleeved on the outside of the plurality of contraction columns I, a movable pad I fixedly connected to the distal end of the plurality of contraction columns I, a baffle fixedly connected to the top of the movable pad I, a plurality of contraction columns II fixedly connected to the bottom of the inner wall of the outer shell, a spring II respectively sleeved on the outside of the plurality of contraction columns II, a movable pad II fixedly connected to the distal end of the plurality of contraction columns II, a sealing gasket fixedly connected to the bottom of the outer shell, a mating interface fixedly connected to the inner wall of the concave pad, and a protective component for protection fixedly connected to the top of the outer shell.

[0007] As a further description of the above technical solution: the protective component includes a protective shell, the bottom end of which is fixedly connected to the top end of the outer shell, a protective layer is fixedly connected to the inner wall of the protective shell, and a waterproof layer is fixedly connected to the inner wall of the protective layer.

[0008] As a further description of the above technical solution: the inner wall of the baffle is fixedly connected to the outside of the interface, and the outer side of the movable pad is fixedly connected to the outside of the interface.

[0009] As a further description of the above technical solution: the inner wall of the second movable pad is fixedly connected to the outside of the interface, and the outside of the baffle is slidably connected to the inner wall of the outer shell.

[0010] As a further description of the above technical solution: the distal ends of the plurality of springs are fixedly connected to the inside of the housing, and the proximal ends of the plurality of springs are fixedly connected to the outside of the movable pad.

[0011] As a further description of the above technical solution: the distal ends of the plurality of springs are fixedly connected to the inside of the outer casing, and the proximal ends of the plurality of springs are fixedly connected to the outside of the movable pad.

[0012] As a further description of the above technical solution: the protective layer is made of metal, and the waterproof layer is made of nano-waterproof coating.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the baffle drives the first movable pad to compress the first contraction column and the first spring to move downwards, while the second movable pad moves upwards under the action of the second contraction column and the second spring, so that the sealing gasket fits tightly with the interface. Through the cooperation of multiple movable structures with the sealing gasket and the interface, the sealing effect of the shell connection is enhanced.

[0015] 2. In this invention, the protective layer is made of metal, which possesses excellent mechanical properties, high strength, and good toughness, effectively resisting external mechanical impacts such as collisions and scratches, thus forming a solid physical barrier for key internal components. Simultaneously, its excellent chemical stability allows it to remain stable in complex chemical environments, preventing corrosion from various corrosive substances. The waterproof layer is made of a nano-waterproof coating, which utilizes cutting-edge nanotechnology to construct an extremely fine and uniformly dense waterproof film on the object's surface. Its unique molecular structure gives it superhydrophobic properties; water can hardly adhere to its surface and can quickly slide off, like water droplets on a lotus leaf. With this characteristic, the nano-waterproof coating can effectively block the intrusion of external moisture, ensuring a dry internal environment and providing reliable waterproof protection for the overall structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a ceramic pressure sensor housing with self-calibration function proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the protective shell of a ceramic pressure sensor housing with self-calibration function proposed in this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0020] Legend:

[0021] 1. Outer shell; 2. Concave pad; 3. Baffle; 4. Moving pad one; 5. Retractable column one; 6. Spring one; 7. Moving pad two; 8. Retractable column two; 9. Spring two; 10. Connecting interface; 11. Sealing gasket; 12. Protective shell; 13. Protective layer; 14. Waterproof layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 3This utility model provides an embodiment of a ceramic pressure sensor housing with self-calibration function, comprising an outer shell 1. A concave pad 2 is fixedly connected to the inner wall of the outer shell 1. The concave design of the concave pad 2 can better fit the interface 10. When subjected to pressure, the concave pad 2 deforms, filling any gaps that may exist, thereby playing a preliminary sealing role, effectively preventing external impurities from entering from the side, and enhancing the overall sealing performance. Multiple contraction columns 5 are fixedly connected to the inner wall of the outer shell 1. Springs 6 are respectively sleeved on the outside of the multiple contraction columns 5. When external pressure is applied to the baffle 3, the baffle 3 drives the moving pad 4 to move downward. At this time, the contraction columns 5 are compressed, and the springs 6 are also compressed and stored energy. After the pressure is removed, the springs 6 release elastic potential energy, pushing the moving pad 4 and the baffle 3 to return to their original positions. The moving pad 4 is fixedly connected to the far end of the multiple contraction columns 5. Under the action of the contraction columns 5 and the springs 6, the moving pad 4 can move up and down inside the outer shell 1.

[0024] When the baffle 3 is under pressure, the movable pad 4 moves downward, pushing the sealing gasket 11 to fit more tightly with the interface 10, further enhancing the sealing effect and preventing liquid leakage from the bottom. The top of the movable pad 4 is fixedly connected to the baffle 3. When external pressure is applied, the baffle 3 can evenly transmit the pressure to the movable pad 4, thereby driving the contraction column 5 and the spring 6 to work, while also protecting the internal structures such as the contraction column 5 and the spring 6 from direct external impact. Multiple contraction columns 8 are fixedly connected to the bottom of the inner wall of the outer shell 1. Each of the multiple contraction columns 8 is fitted with a spring 9. The spring 9 is made of the same material as the spring 6 and has stable elasticity. When the movable pad 7 is subjected to upward pressure, the contraction column 8 is compressed, and the spring 9 stores energy; after the pressure is removed, the spring 9 pushes the movable pad 7 to return to its original position.

[0025] Multiple shrinkable columns 8 are respectively fitted with springs 9. The opposite ends of the multiple shrinkable columns 8 are fixedly connected to movable pads 7. Movable pads 7 move upward under the drive of shrinkable columns 8 and springs 9, and move towards movable pads 4. Together they push the sealing gasket 11 to fit tightly against the interface 10, and strengthen the sealing effect from the bottom and the side. The bottom end of the outer shell 1 is fixedly connected to the sealing gasket 11. Under the joint action of movable pads 4 and movable pads 7, the sealing gasket 11 can fit tightly against the interface 10, forming a reliable sealing barrier. The inner wall of the concave gasket 2 is fixedly connected to the interface 10. The top end of the outer shell 1 is fixedly connected to the protective component.

[0026] Reference Figures 2 to 4The protective component includes a protective shell 12. Upon impact, the protective shell 12 evenly distributes the impact force, effectively preventing damage to the top of the outer shell 1 due to concentrated force, thus providing the first layer of physical protection for the entire device. The bottom of the protective shell 12 is fixedly connected to the top of the outer shell 1. The protective layer 13, with its inherent hardness, resists scratches, preventing penetration of the protective shell 12 and protecting the internal structure. The inner wall of the protective shell 12 is fixedly connected to the protective layer 13, which blocks physical damage. A waterproof layer 14 isolates moisture, providing dual protection and creating a dry and safe environment inside the device, further enhancing the overall protective performance of the component. The inner wall of the protective layer 13 is also fixedly connected to the waterproof layer 14.

[0027] The protective layer 13 is made of metal, which can effectively resist mechanical impacts from the outside world, such as collisions and scratches, thus forming a solid physical barrier for critical internal components. At the same time, its excellent chemical stability allows it to remain stable in complex chemical environments, avoiding corrosion by various corrosive substances.

[0028] The waterproof layer 14 is made of a nano-waterproof coating. The superhydrophobic properties of this nano-waterproof coating give it excellent waterproofing performance. Compared to traditional waterproof materials, the nano-waterproof coating is extremely thin, yet it forms a dense waterproof film, providing not only superior waterproofing performance but also minimal impact on the overall weight and size of the device. Furthermore, the nano-waterproof coating has good adhesion and durability, maintaining stable waterproofing performance even under long-term use and frequent contact with moisture, eliminating the need for frequent replacements, reducing maintenance costs, and providing reliable waterproofing protection for the long-term stable operation of the sensor.

[0029] Reference Figures 1 to 3 The inner wall of baffle 3 is fixedly connected to the outside of interface 10. When interface 10 is connected to external equipment or pipelines and subjected to external pressure, baffle 3, due to its tight connection with interface 10, can quickly sense pressure changes. The outer side of movable pad 4 is fixedly connected to the outside of interface 10. When baffle 3 transmits pressure, movable pad 4, due to its fixed connection with interface 10, can respond quickly and move downwards under the guidance and buffering action of contraction column 5 and spring 6. The inner wall of movable pad 7 is fixedly connected to the outside of interface 10. When subjected to pressure from below, movable pad 7 can transmit pressure to interface 10 and move upwards under the action of contraction column 8 and spring 9. The outer side of baffle 3 is slidably connected to the inner wall of housing 1.

[0030] When external pressure is applied to the baffle 3, the baffle 3 moves along the inner wall of the outer shell 1 under the constraint of the slide groove and slide rail, avoiding displacement or shaking caused by uneven force. The distal ends of multiple springs 6 are fixedly connected to the inside of the outer shell 1. When the movable pad 4 moves downward under the pressure transmitted by the baffle 3, the proximal ends of the springs 6 move with the movable pad 4, while the distal ends are fixed to the outer shell 1, causing the springs 6 to be compressed and store energy. The proximal ends of multiple springs 6 are fixedly connected to the outside of the movable pad 4. When the movable pad 4 moves downward under pressure, the springs 6 are compressed accordingly. After the pressure is removed, the elastic restoring force of the springs 6 pushes the movable pad 4 back upward.

[0031] Multiple springs 9 have their distal ends fixedly connected to the inside of the outer casing 1. When the movable pad 7 is subjected to upward pressure, the proximal ends of the springs 9 move with the movable pad 7, while the distal ends are fixed to the outer casing 1, causing the springs 9 to be compressed and store energy. The proximal ends of the multiple springs 9 are also fixedly connected to the outside of the movable pad 7. When the movable pad 7 is subjected to pressure, the springs 9 respond promptly and provide a buffering force. After the pressure is removed, the elastic restoring force of the springs 9 pushes the movable pad 7 back to its original position.

[0032] Working principle: When external pressure is applied to baffle 3, baffle 3 drives movable pad 4, causing movable pad 4 to compress spring 6 and move downwards along the direction of contraction column 5. At the same time, at the bottom of the inner wall of the outer shell 1, the structure formed by contraction column 8 and spring 9 is driven by force to move movable pad 7 upwards. Movable pad 4 and movable pad 7 move towards each other, causing the sealing gasket 11 to fit tightly against the interface 10. Through the linkage structure formed by contraction column 5, contraction column 8, spring 6, spring 9, movable pad 7, and movable pad 4, in conjunction with the sealing gasket 11 and the interface 10, the sealing performance at the connection of the outer shell 1 is improved, thereby enhancing the sealing performance at the connection of the outer shell 1.

[0033] The protective layer 13 is made of metal, which undergoes rigorous selection and possesses high strength, effectively resisting mechanical impacts from the outside world. Whether it's collisions that may occur during daily use or scratches from sharp objects, its robust texture provides solid and reliable physical protection for critical internal components, preventing damage. Furthermore, this metal material also exhibits excellent chemical stability, remaining stable in complex and changing chemical environments. It significantly reduces the risk of corrosion from various corrosive substances such as acids, alkalis, and salts, ensuring the integrity of the protective layer 13 and the durability of its protective performance.

[0034] The waterproof layer 14 is made of a nano-waterproof coating. Utilizing cutting-edge nanotechnology, this coating successfully constructs an extremely fine and uniformly dense waterproof film on the surface of the object. At the microscopic level, its unique molecular structure exhibits a distinctive arrangement, giving the coating its superhydrophobic properties. When water comes into contact with the waterproof layer 14, due to surface tension, the water droplets cannot adhere to its surface but quickly slide off, much like water droplets on a lotus leaf. With this superior property, the nano-waterproof coating can efficiently and persistently block the intrusion of external moisture. Even in high-humidity environments or in the face of sudden water splashes, it can always maintain a dry internal environment, providing comprehensive and reliable waterproof protection for the overall structure, effectively extending the service life of internal equipment and improving the stability of equipment operation.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ceramic pressure sensor housing with self-calibration function, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is fixedly connected to a concave pad (2), and the inner wall of the outer shell (1) is fixedly connected to a plurality of contraction columns (5). The outer sides of the plurality of contraction columns (5) are respectively fitted with springs (6). The far ends of the plurality of contraction columns (5) are fixedly connected to a movable pad (4). The top of the movable pad (4) is fixedly connected to a baffle (3). The bottom of the inner wall of the outer shell (1) is fixedly connected to a plurality of contraction columns (8). The outer sides of the plurality of contraction columns (8) are respectively fitted with springs (9). The far ends of the plurality of contraction columns (8) are fixedly connected to a movable pad (7). The bottom of the outer shell (1) is fixedly connected to a sealing gasket (11). The inner wall of the concave pad (2) is fixedly connected to a mating interface (10). The top of the outer shell (1) is fixedly connected to a protective component for protection.

2. The ceramic pressure sensor housing with self-calibration function according to claim 1, characterized in that: The protective component includes a protective shell (12), the bottom end of which is fixedly connected to the top end of the outer shell (1), a protective layer (13) is fixedly connected to the inner wall of the protective shell (12), and a waterproof layer (14) is fixedly connected to the inner wall of the protective layer (13).

3. The ceramic pressure sensor housing with self-calibration function according to claim 1, characterized in that: The inner wall of the baffle (3) is fixedly connected to the outside of the interface (10), and the outer side of the movable pad (4) is fixedly connected to the outside of the interface (10).

4. A ceramic pressure sensor housing with self-calibration function according to claim 1, characterized in that: The inner wall of the movable pad 2 (7) is fixedly connected to the outside of the interface (10), and the outside of the baffle (3) is slidably connected to the inner wall of the outer shell (1).

5. A ceramic pressure sensor housing with self-calibration function according to claim 1, characterized in that: The distal ends of the plurality of springs (6) are fixedly connected to the interior of the housing (1), and the proximal ends of the plurality of springs (6) are fixedly connected to the exterior of the movable pad (4).

6. A ceramic pressure sensor housing with self-calibration function according to claim 1, characterized in that: The distal ends of the plurality of springs (9) are fixedly connected to the interior of the outer casing (1), and the proximal ends of the plurality of springs (9) are fixedly connected to the exterior of the movable pad (7).

7. A ceramic pressure sensor housing with self-calibration function according to claim 2, characterized in that: The protective layer (13) is made of metal, and the waterproof layer (14) is made of nano-waterproof coating.

Images