Low-cost high-precision gas pressure sensor

Abstract

The utility model discloses a low -cost high accuracy gas pressure sensor, including pressure sensitive subassembly, press tightly seat, pillar, screw, circuit component, outer tube, metal gran connector and cable, pressure sensitive subassembly is composed by the nipple and pressure core body, is used for feeling and transmitting medium pressure signal, press tightly seat one end is connected with pressure sensitive subassembly screw thread, and the other end is connected with the pillar screw thread, is used for supporting circuit component, the pillar is fastened connection with circuit component through screw, realizes the fixation of circuit component, the outer tube is support protection structural member, and the inside contains pressure sensitive subassembly, press tightly seat, pillar, screw and circuit component, metal gran connector is connected with outer tube, is used for fixed cable, circuit component is used for the temperature compensation and amplification of the electric signal of pressure sensitive subassembly sensing, the cable is used for power supply and electric signal transmission to external system.

Description

Technical Field

[0001] This utility model belongs to the field of pressure sensor technology, and in particular relates to a low-cost, high-precision gas pressure sensor. Background Technology

[0002] In gas transmission and distribution systems, gas pipelines of different pressure levels are connected by pressure regulating devices. The tightness requirements for gas pipelines are much higher than those for ordinary pipelines. The higher the gas pressure inside the pipeline, the greater the risk of joints falling off or pipeline cracks. Once a gas leak occurs, it can easily lead to serious accidents such as fire, explosion, and poisoning.

[0003] Therefore, pressure monitoring of gas pipelines requires high-precision pressure sensors, but existing pressure sensors have many shortcomings: some products are not accurate enough to meet the strict monitoring requirements of gas pipelines; some high-precision products are too expensive, which is not conducive to large-scale promotion and application; at the same time, traditional sensors have shortcomings in waterproof and explosion-proof performance and dynamic response speed, and cannot adapt to the complex operating environment of gas pipelines. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a low-cost, high-precision gas pressure sensor, including a pressure-sensitive component, a clamping seat, a support column, screws, a circuit assembly, an outer cylinder, a metal gland connector, and a cable. The pressure-sensitive component consists of a connector and a pressure core, its core function being to achieve pipeline interface connection and efficiently and reliably sense and transmit medium pressure signals. One end of the clamping seat is threadedly connected to the pressure-sensitive component, and the other end is threadedly connected to the support column, serving to support the circuit assembly. One end of the support column is threadedly connected to the clamping seat, and the other end is combined with the screw to securely fix the circuit assembly. The screw is a standard component, mainly used to lock the circuit assembly. The core function of the circuit assembly is to perform temperature compensation and amplification on the electrical signal sensed by the pressure-sensitive component, ensuring signal accuracy. The outer cylinder is a supporting and protective structure used to house and protect all internal core components. The metal gland connector is connected to the outer cylinder to fix the cable, and it is integrated with a waterproof and breathable valve, balancing pressure measurement accuracy and waterproof performance. The cable is used to power the product and transmit the processed electrical signal to an external system.

[0006] Preferably, the pressure-sensitive component includes a connector and a pressure core.

[0007] Preferably, the pressure core adopts a silicon piezoresistive pressure core and uses a silicone oil metal encapsulation process. The medium pressure is transmitted to the sensitive chip through a stainless steel diaphragm and internally sealed silicone oil. The sensitive chip does not directly contact the measured medium, forming an all-solid-state pressure measurement structure that is suitable for various application scenarios, including corrosive media.

[0008] Preferably, the pressure core and the connecting nozzle are connected and fixed by continuous laser welding, which improves the connection strength and sealing performance and eliminates the risk of leakage.

[0009] Preferably, the metal gland joint has a waterproof and breathable valve integrated into it.

[0010] This application provides a low-cost, high-precision gas pressure sensor. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0012] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0013] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0015] Figure 3 This is a partial structural schematic diagram of the present invention.

[0016] Reference numerals: 1. Pressure-sensitive component; 11. Connecting nozzle; 12. Pressure core; 2. Pressing seat; 3. Support; 4. Screw; 5. Circuit assembly; 6. Outer cylinder; 7. Metal gland connector; 8. Cable; 9. Waterproof and breathable valve. Detailed Implementation

[0017] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0018] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0019] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-3 As shown, the low-cost, high-precision gas pressure sensor of this utility model includes a pressure-sensitive component 1, a clamping seat 2, a support column 3, a screw 4, a circuit component 5, an outer cylinder 6, a metal gland connector 7, and a cable 8.

[0023] Specifically, the pressure-sensitive component 1 consists of a connector 11 and a silicon piezoresistive pressure core 12. The pressure core 12 is encapsulated using a silicone oil metal encapsulation process. The connector 11 and the pressure core 12 are connected by continuous laser welding to ensure connection strength and sealing, preventing leakage. The clamping seat 2 connects the pressure-sensitive component 1 and the support column 3 via threads, serving as an intermediate support and connection. The support column 3, in conjunction with screws 4, secures the circuit component 5 in a designated position. The circuit component 5 has a built-in secondary temperature compensation module that compensates and amplifies the electrical signal output by the pressure-sensitive component 1. Through the all-solid-state structure design of the silicon piezoresistive pressure core 12, combined with secondary temperature compensation technology, the overall accuracy across the entire temperature range is better than ±0.5%FS, meeting the high-precision monitoring requirements of gas pipelines.

[0024] The outer cylinder 6 is made of stainless steel and houses the pressure-sensitive component 1, clamping seat 2, support column 3, screw 4, and circuit component 5, providing overall protection. A metal gland connector 7 is fixedly connected to the outer cylinder 6 and integrates a waterproof and breathable valve 9, ensuring accurate measurement of pipeline gauge pressure while preventing external moisture from entering the product. This eliminates the need for additional mounting holes on the outer cylinder 6, improving its versatility. The cable 8 is fixed via the metal gland connector 7, connecting one end to the circuit component 5 and the other end to an external power supply and signal receiving system. The stainless steel main structure, laser-welded sealing process, and the metal gland connector 7 with its integrated waterproof and breathable valve 9 achieve excellent waterproof, explosion-proof, and corrosion-resistant performance, making it suitable for complex and harsh operating environments.

[0025] In this embodiment, the nozzle 11, clamping seat 2, support column 3, screw 4, outer cylinder 6, and metal gland connector 7 are all selected from standard parts or general-purpose components, effectively controlling costs. The product as a whole adopts a stainless steel structure, and the pressure sensing part is sealed by laser welding, which has good mechanical strength, corrosion resistance, and waterproof and explosion-proof performance, and can be adapted to the complex use environment of gas pipelines. The high natural frequency characteristics of the silicon piezoresistive pressure core 12, combined with the all-solid-state structure, enable the product to have a fast dynamic response and meet the requirements of transient pressure measurement.

[0026] Through the above structural design, this utility model achieves a comprehensive technical effect of low cost, high precision, fast response, waterproof and explosion-proof, and can be widely used in pressure monitoring scenarios of gas transmission and distribution systems.

[0027] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A low-cost, high-precision gas pressure sensor, characterized in that, The system includes a pressure-sensitive component, a clamping seat, a support column, screws, a circuit assembly, an outer cylinder, a metal gland connector, and a cable. The pressure-sensitive component, consisting of a connector and a pressure core, senses and transmits medium pressure signals. One end of the clamping seat is threaded to the pressure-sensitive component, and the other end is threaded to the support column, supporting the circuit assembly. The support column is fastened to the circuit assembly with screws to secure it. The outer cylinder serves as a supporting and protective structure, housing the pressure-sensitive component, clamping seat, support column, screws, and circuit assembly. The metal gland connector connects to the outer cylinder to secure the cable. The circuit assembly performs temperature compensation and amplification on the electrical signals sensed by the pressure-sensitive component. The cable provides power and transmits electrical signals to an external system.

2. The low-cost, high-precision gas pressure sensor according to claim 1, characterized in that: The pressure-sensitive component includes a connector and a pressure core.

3. The low-cost, high-precision gas pressure sensor according to claim 2, characterized in that: The pressure core is a silicon piezoresistive pressure core, which adopts a silicone oil metal encapsulation process to form an all-solid-state pressure measurement structure.

4. The low-cost, high-precision gas pressure sensor according to claim 2, characterized in that: The pressure core and the connecting nozzle are connected and fixed by continuous laser welding.

5. The low-cost, high-precision gas pressure sensor according to claim 1, characterized in that: The metal gland joint has an integrated waterproof and breathable valve.

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