Pressure sensor with high detection precision

Abstract

The utility model discloses a pressure sensor with high detection precision, which comprises a shell, the bottom end of the shell is provided with threads, the lower surface of the shell is provided with an O-shaped ring, the interior of the shell is fixedly connected with a detection frame, the side surface of the detection frame is fixedly connected with a gasket, and the inner side wall of the detection frame is provided with a sealing ring. A piezoelectric element is arranged on the upper surface of the sealing ring, and an elastic piece is arranged on the upper surface of the piezoelectric element. The lower surface of the connector is fixedly connected with a sealing shell, the interior of the sealing shell is fixedly connected with a rubber sleeve, the interior of the connector is fixedly connected with a contact pin, and the bottom end of the contact pin is communicated with a cable. Through the above structure, the joint of the cable and the contact pin is protected through the rubber sleeve, and the elastic sheet is embedded in the upper surface of the piezoelectric element, so that vibration generated when the device is stressed can be reduced, the stability of the detection component is improved, the detection precision of the device is maintained, and the influence of vibration of the device on cable connection can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a pressure sensor with high detection accuracy. Background Technology

[0002] Existing high-precision pressure sensors employ sealing components to protect the sensing element from corrosion in order to ensure measurement accuracy. However, when external pressure impacts the rubber cover, vibrations can easily occur, leading to errors in the measured values. For example, a high-precision pressure sensor disclosed in Chinese patent application number CN202122301943.6 uses a support plate placed on the inner wall of a rubber cover to seal the pressure sensor chip and the support plate, protecting the chip and eliminating concerns about corrosion of the support plate or sensor chip, thus ensuring measurement accuracy. However, when external pressure impacts the rubber cover, vibrations can easily occur, leading to errors in the measured values ​​and affecting the device's accuracy. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a pressure sensor with high detection accuracy. A sealing ring made of EPDM rubber is provided on the lower surface of the piezoelectric element to prevent pressure leakage, concentrating the pressure on the lower surface of the piezoelectric element and increasing the detection accuracy. A gasket on the side surface of the detection frame reduces the distance between the detection frame and the housing, and a silicone ring further enhances the sealing performance around the detection frame, increasing pressure detection accuracy. The piezoelectric element, made of ceramic material, detects the pressure transmitted from the slot, converts the pressure into current, transmits it through a cable to the pin, and transmits the pressure signal. A rubber sleeve is provided around the cable to isolate the current, sealing the cable connection, protecting the cable connection, extending the service life of electronic components, preventing cable bending that could cause connection instability, increasing the connection strength between the cable and the pin, and embedding a spring clip on the upper surface of the piezoelectric element to reduce vibration when the device is under stress, increasing the stability of the detection component, maintaining the detection accuracy of the device, and preventing device vibration from affecting the cable connection.

[0004] This utility model also provides a device comprising: a housing, wherein the bottom end of the housing is threaded, an O-ring is provided on the lower surface of the housing, a detection frame is fixedly connected inside the housing, a gasket is fixedly connected to the side surface of the detection frame, a sealing ring is provided on the inner side wall of the detection frame, a piezoelectric element is provided on the upper surface of the sealing ring, and a spring is provided on the upper surface of the piezoelectric element; and a connector, wherein a sealing shell is fixedly connected to the lower surface of the connector, a rubber sleeve is fixedly connected inside the sealing shell, a pin is fixedly connected inside the connector, and a cable is connected to the bottom end of the pin. The above components include a EPDM rubber sealing ring on the lower surface of the piezoelectric element to prevent pressure leakage, concentrating pressure on the lower surface of the piezoelectric element and increasing its detection accuracy. Gaskets on the side surface of the detection frame reduce the distance between the detection frame and the housing, and silicone rings further enhance the sealing performance around the detection frame, increasing pressure detection accuracy. The ceramic piezoelectric element detects the pressure transmitted from the slot, converting it into current, which is then transmitted to the pin via a cable, transmitting the pressure signal. A rubber sleeve around the cable isolates the current, sealing the cable connection and protecting it, extending the lifespan of electronic components, preventing cable bending that could cause connection instability, and increasing the connection strength between the cable and the pin. A spring clip embedded in the upper surface of the piezoelectric element reduces vibration under stress, increasing the stability of the detection components, maintaining the device's detection accuracy, and preventing device vibration from affecting the cable connection.

[0005] According to the high-precision pressure sensor of this invention, the inner wall of the O-ring is fitted to the side surface of the housing, and the side surface of the piezoelectric element is fixedly connected to the inner wall of the detection frame. These components limit the range of motion of the piezoelectric element, increasing its stability. The O-ring also provides a seal to prevent leakage at the connection point when the housing is installed via threads.

[0006] According to the high-precision pressure sensor of this invention, there are two springs located on both sides of the piezoelectric element, and the springs are made of beryllium bronze. These components, with their symmetrical arrangement of the springs, maintain the balance of the device and increase its detection stability.

[0007] According to the high-precision pressure sensor described in this utility model, the housing is made of 304 stainless steel, and the O-ring and sealing ring are made of EPDM rubber. These components increase the robustness of the housing and enhance the environmental adaptability of the O-ring and sealing ring, ensuring they maintain a tight seal in various environments.

[0008] According to the high-precision pressure sensor of this invention, the piezoelectric element is made of ceramic, and the gasket and connector are made of polyamide resin. Through these components, the ceramic piezoelectric element prevents short circuits, and the polyamide resin gasket and connector provide insulation and can withstand high-temperature environments.

[0009] According to the high-precision pressure sensor of this invention, the lower surface of the sealing shell contacts the upper surface of the detection frame, and a silicone ring is provided between the sealing shell and the detection frame. These components seal the detection frame, preventing pressure leakage and absorbing vibrations generated during device use, thereby increasing detection accuracy.

[0010] According to the high-precision pressure sensor of this invention, the rubber sleeve and pins are three in number and arranged in an array inside the sealed housing, and the pins are made of brass. These components facilitate connection to a socket to transmit the sensor signal.

[0011] According to the high-precision pressure sensor of this invention, the bottom end of the pin and the cable are located inside the rubber sleeve, and the upper surface of the rubber sleeve and the end of the cable away from the pin are fixedly connected to the upper surface of the piezoelectric element. These components enable the rubber sleeve to protect the cable and pin, preventing unstable cable connections.

[0012] Beneficial effects:

[0013] Compared with existing technologies, this invention features a sealing ring made of EPDM rubber on the lower surface of the piezoelectric element to prevent pressure leakage, concentrating the pressure on the lower surface of the piezoelectric element and increasing its detection accuracy. A gasket on the side surface of the detection frame reduces the distance between the detection frame and the housing, and a silicone ring further enhances the sealing performance around the detection frame, increasing pressure detection accuracy. The ceramic piezoelectric element detects the pressure transmitted from the slot, converting the pressure into current, which is then transmitted to the pin via a cable, transmitting the pressure signal. A rubber sleeve around the cable isolates the current, sealing the cable connection and protecting it, extending the lifespan of electronic components, preventing cable bending that could cause connection instability, and increasing the connection strength between the cable and the pin. Furthermore, a spring clip embedded in the upper surface of the piezoelectric element reduces vibration under stress, increasing the stability of the detection component, maintaining the device's detection accuracy, and preventing device vibration from affecting the cable connection. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is an overall structural diagram of the high-precision pressure sensor of this utility model;

[0016] Figure 2 This is a front cross-sectional view of the high-precision pressure sensor of this utility model;

[0017] Figure 3 This is a side cross-sectional view of the high-precision pressure sensor of this utility model;

[0018] Figure 4 This utility model provides a high-precision pressure sensor. Figure 3 Structural diagram at point A in the middle.

[0019] Legend:

[0020] 1. Housing; 2. Thread; 3. O-ring; 4. Detection frame; 5. Gasket; 6. Sealing ring; 7. Piezoelectric element; 8. Spring; 9. Connector; 10. Sealing shell; 11. Rubber sleeve; 12. Pin; 13. Cable; 14. Silicone ring; 15. Hole / groove. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4 The present invention relates to a high-precision pressure sensor, comprising: a housing 1, which is made of 304 stainless steel, with a groove 15 inside the housing 1 and a thread 2 at the bottom end of the housing 1; an O-ring 3 on the lower surface of the housing 1, the inner wall of the O-ring 3 being in contact with the side surface of the housing 1; a detection frame 4 fixedly connected inside the housing 1; a gasket 5 fixedly connected to the side surface of the detection frame 4, the gasket 5 being made of polyamide resin; a sealing ring 6 on the inner wall of the detection frame 4, the O-ring 3 and the sealing ring 6 being made of EPDM rubber; a piezoelectric element 7 on the upper surface of the sealing ring 6, the piezoelectric element 7 being made of ceramic, the side surface of the piezoelectric element 7 being fixedly connected to the inner wall of the detection frame 4; and two springs 8 on the upper surface of the piezoelectric element 7, the springs 8 being made of beryllium bronze, the springs 8 being located on both sides of the piezoelectric element 7.

[0023] Specifically, the housing 1 can be installed at the detection point via the thread 2 at the bottom. After installation, the O-ring 3 can seal the connection to prevent pressure leakage. External pressure can enter the detection frame 4 through the groove 15 inside the housing 1 to apply pressure to the piezoelectric element 7. The lower surface of the piezoelectric element 7 is provided with a sealing ring 6 to prevent pressure leakage from the edge of the piezoelectric element 7 and ensure uniform pressure distribution. The gasket 5 on the side surface of the detection frame 4 can reduce the distance between the detection frame 4 and the housing 1, increase the stability of the detection frame 4, and prevent the detection results of the piezoelectric element 7 from being affected. Furthermore, a spring 8 is provided on the upper surface of the piezoelectric element 7 to reduce the vibration generated when the device is under force.

[0024] Connector 9 is made of polyamide resin. A sealing shell 10 is fixedly connected to the lower surface of connector 9. The lower surface of the sealing shell 10 is in contact with the upper surface of the detection frame 4. A silicone ring 14 is provided between the sealing shell 10 and the detection frame 4. A rubber sleeve 11 is fixedly connected inside the sealing shell 10. A pin 12 is fixedly connected inside connector 9. The pin 12 is made of brass. There are three rubber sleeves 11 and three pins 12 arranged in an array inside the sealing shell 10. A cable 13 is connected to the bottom end of the pin 12. The bottom end of the pin 12 and the cable 13 are located inside the rubber sleeve 11. The upper surface of the rubber sleeve 11 and the end of the cable 13 away from the pin 12 are fixedly connected to the upper surface of the piezoelectric element 7.

[0025] Specifically, a silicone ring 14, together with a gasket 5 and a sealing ring 6, is provided between the sealing shell 10 and the detection frame 4 to further increase the sealing performance of the device and prevent pressure leakage. The detection signal of the piezoelectric element 7 is transmitted to the pin 12 through the cable 13. The pin 12, together with the connector 9, can be connected to other components to transmit the detection signal to other devices, thereby analyzing and processing the pressure value. A rubber sleeve 11 is provided around the cable 13 and the pin 12 to seal and protect them, extend the service life of electronic components at the connection of the cable 13, prevent the cable 13 from bending and causing unstable connection, increase the connection strength between the cable 13 and the pin 12, and reduce the vibration of the device during detection with the help of the spring 8, thereby increasing the detection accuracy.

[0026] Working Principle: During use, the device is installed at the detection point via the thread 2 at the bottom of the housing 1. After installation, the O-ring 3 seals the connection, preventing pressure leakage. External pressure enters the detection frame 4 through the groove 15 inside the housing 1, applying pressure to the piezoelectric element 7. A sealing ring 6 is provided on the lower surface of the piezoelectric element 7 to prevent pressure leakage from its edge, ensuring uniform pressure distribution. The gasket 5 on the side surface of the detection frame 4 reduces the distance between the detection frame 4 and the housing 1, increasing the stability of the detection frame 4 and preventing the detection results of the piezoelectric element 7 from being affected. A spring 8 is provided on the upper surface of the piezoelectric element 7 to reduce vibration generated when the device is under stress. A silicone ring 14, along with a gasket 5 and a sealing ring 6, is provided between the sealing shell 10 and the detection frame 4 to further enhance the sealing performance of the device and prevent pressure leakage. The detection signal of the piezoelectric element 7 is transmitted to the pin 12 through the cable 13. The pin 12, along with the connector 9, can be connected to other components to transmit the detection signal to other devices, thereby analyzing and processing the pressure values. A rubber sleeve 11 is provided around the cable 13 and the pin 12 to seal and protect them, extending the service life of electronic components at the connection of the cable 13 and preventing the cable 13 from bending and causing unstable connection. This increases the connection strength between the cable 13 and the pin 12. The spring 8, together with the spring, reduces the vibration of the device during detection and increases the detection accuracy.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pressure sensor with high detection accuracy, characterized by Include: The shell (1), the hole groove (15) is opened inside the shell (1), the screw thread (2) is opened in the bottom end of the shell (1), the O-shaped ring (3) is arranged on the lower surface of the shell (1), the detection frame (4) is fixedly connected inside the shell (1), the gasket (5) is fixedly connected on the side surface of the detection frame (4), the sealing ring (6) is arranged on the inner side wall of the detection frame (4), the piezoelectric element (7) is arranged on the upper surface of the sealing ring (6), the spring piece (8) is arranged on the upper surface of the piezoelectric element (7); The joint (9) is fixedly connected with the sealing shell (10) on the lower surface, the rubber sleeve (11) is fixedly connected inside the sealing shell (10), the pin (12) is fixedly connected inside the joint (9), the cable (13) is communicated with the bottom end of the pin (12).

2. The pressure sensor with high detection accuracy according to claim 1, characterized by, The inner side wall of the O-shaped ring (3) is attached to the side surface of the shell (1), and the side surface of the piezoelectric element (7) is fixedly connected with the inner side wall of the detection frame (4).

3. The pressure sensor with high detection accuracy according to claim 1, characterized by The spring piece (8) has two and is located on both sides of the piezoelectric element (7), and the spring piece (8) is made of beryllium bronze material.

4. The pressure sensor with high detection accuracy according to claim 1, characterized by The shell (1) is made of 304 stainless steel material, and the O-shaped ring (3) and the sealing ring (6) are made of EPDM rubber material.

5. The pressure sensor with high detection accuracy according to claim 1, characterized by The piezoelectric element (7) is made of ceramic material, and the gasket (5) and the joint (9) are made of polyamide resin material.

6. The pressure sensor with high detection accuracy according to claim 1, characterized by The lower surface of the sealing shell (10) is in contact with the upper surface of the detection frame (4), and the sealing shell (10) and the detection frame (4) are provided with silica gel ring (14).

7. The pressure sensor with high detection accuracy according to claim 1, characterized by The rubber sleeve (11) and the pin (12) have three and are arrayed inside the sealing shell (10), and the pin (12) is made of brass material.

8. The pressure sensor with high detection accuracy according to claim 1, characterized by The bottom end of the pin (12) and the cable (13) are located inside the rubber sleeve (11), and the upper surface of the rubber sleeve (11) and the cable (13) are fixedly connected with the upper surface of the piezoelectric element (7) away from the pin (12).

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