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KR-20260064684-A - pressure sensor

KR20260064684AKR 20260064684 AKR20260064684 AKR 20260064684AKR-20260064684-A

Abstract

In a pressure sensor (100), a sensing unit (10) and a strain structure (30) are included, a pressure entry channel (11) is provided within the sensing unit (10), a pressure entry port (12) communicating with the pressure entry channel (11) is provided at one end of the sensing unit (10), a sensing plane (13) is provided on the outer side of the sensing unit (10), the strain structure (30) is provided on the sensing plane (13), the sensing unit (10) is an integral manufacturing molded structure, and the wall thickness of the sensing unit (10) between the sensing plane (13) and the inner surface of the pressure entry channel (11) is defined as W, and W satisfies the condition 0.1mm ≤ W ≤ 1.5mm.

Inventors

  • 쉬 원치앙

Assignees

  • 츄로드 센싱 테크놀로지스 (쑤저우) 컴퍼니 리미티드

Dates

Publication Date
20260507
Application Date
20240705
Priority Date
20230706

Claims (12)

  1. In pressure sensors, The pressure sensor described above includes a sensing unit, a strain structure, and an integrated circuit unit, and A pressure entry channel is provided within the sensing unit, a pressure entry port communicating with the pressure entry channel is provided at one end of the sensing unit, and a sensing plane is provided on the outer periphery of the sensing unit. The strain structure is provided on the sensing plane, and the strain structure includes a pressure measuring strain piece and a packaging glass, the pressure measuring strain piece is attached to the sensing plane, and the packaging glass is connected to the sensing unit and installed to cover the pressure measuring strain piece. The integrated circuit unit is provided at one end of the sensing unit facing away from the pressure inlet and is electrically connected to the strain structure, and A pressure sensor characterized in that the sensing unit is an integrally manufactured molded structure, and the wall thickness of the sensing unit between the sensing plane and the inner surface of the pressure entry channel is defined as W, and W satisfies the condition 0.1mm ≤ W ≤ 1.5mm.
  2. In paragraph 1, A pressure sensor characterized in that the cross-sectional shape of the pressure entry channel in the above-mentioned sensing plane is circular, square, or elliptical.
  3. In any one of paragraphs 1 to 2, The pressure sensor is further provided with a mounting housing, and a receiving space is provided within the mounting housing; A pressure sensor characterized in that the integrated circuit unit is provided within the receiving space and installed along the extension direction of the receiving space, the sensing unit is connected to the mounting housing and at least a portion is provided within the receiving space, and one end of the sensing unit, which is provided with the pressure inlet, is exposed to one side of the mounting housing.
  4. In paragraph 3, The above-mentioned mounting housing includes a housing body, a support frame, and a connection terminal, and A receiving space is formed within the housing body, and a mounting hole communicating with the receiving space is provided at one end of the housing body, and the sensing unit is inserted and coupled into the mounting hole, and a portion of the sensing unit having a sensing plane is provided within the receiving space through the mounting hole; The support frame is provided within the receiving space and connects the housing body, and the integrated circuit unit is mounted on the support frame; A pressure sensor characterized in that the above connection terminal is electrically connected to the above integrated circuit unit, and a portion thereof is exposed at one end of the housing body facing away from the above mounting hole.
  5. In paragraph 4, The above support frame includes a support ring and a fixing bracket, and The support ring is connected to the housing body and abuts the inner wall of the housing body, and the support ring is installed to surround the portion of the sensing unit provided in the receiving space; A pressure sensor characterized in that the fixed bracket is connected to the support ring, and the integrated circuit unit is mounted on one side of the fixed bracket.
  6. In paragraph 4, The above connection terminal includes a terminal base and a terminal body, and The terminal base is provided within the receiving space, a first insertion coupling groove is provided at one end of the terminal base, a second insertion coupling groove is provided at the other end of the terminal base, and the inner wall of the first insertion coupling groove is in communication with the inner wall of the second insertion coupling groove; One end of the terminal body is inserted and coupled into the second insertion coupling groove, and the other end of the terminal body is exposed at one end of the housing body facing away from the mounting hole; A pressure sensor characterized in that one end of the integrated circuit unit facing away from the sensing unit is inserted and coupled into the first insertion coupling groove, and a connection contact is provided in the part of the integrated circuit unit provided in the first insertion coupling groove, and the connection contact is electrically in contact with the terminal body.
  7. In paragraph 3, The above-mentioned mounting housing includes a housing, a cover body, a spring, a conductive member, and a circuit board, and The above housing has an internal cavity; The above cover body is installed at one end of the housing, and a first through hole is opened on the cover body; The above spring is disposed in the first through hole, and one end of the spring protrudes from the upper surface of the cover body; The conductive member is located in the internal cavity of the housing, and one end of the conductive member contacts the other end of the spring; A pressure sensor characterized in that the circuit board is located in an internal cavity of the housing, and one end of the circuit board is connected to the other end of the conductive member.
  8. In Paragraph 7, A pressure sensor characterized in that a first plane and a second plane are installed on the upper part of the cover body, the second plane is located on one side of the first plane, the space between the first plane and the second plane is transitioned in an arc shape, a notch is formed between the first plane and the second plane, and the first through hole is located on the second plane.
  9. In Paragraph 7, A pressure sensor characterized in that the diameter of the first through hole varies along the axial length of the first through hole, and the diameter of the first through hole is larger than the outer diameter of the spring.
  10. In Paragraph 7, A pressure sensor characterized by having a groove formed in the lower part of the cover body, the upper part of the circuit board installed within the groove, a gap formed between the upper part of the circuit board and the wall of the groove, a second through-hole formed on the circuit board, and the other end of the conductive member fixedly coupled to the circuit board through the second through-hole.
  11. In Paragraph 7, A pressure sensor characterized by having a spring contact stage installed on the conductive member, the lower end of the spring in contact with the spring contact stage, and one end of the conductive member adjacent to the spring inserted into the inner circle of the spring.
  12. In Paragraph 10, A pressure sensor characterized by the number of the first through hole, the spring, the second through hole, and the conductive member being multiple.

Description

pressure sensor This application claims priority to Chinese patent application No. 202310821406.5 filed on July 6, 2023 and Chinese patent application No. 2024207730470 filed on April 15, 2024, and all contents of said Chinese patent applications are incorporated by reference into this application. This application relates to the technical field of measuring fluid pressure, and in particular to pressure sensors. Currently, in order to reduce the space occupied by pressure sensors in hydraulic braking systems, most existing pressure sensors detect the pressure of the fluid in the hydraulic braking system using a sensing unit that adopts lateral sensing, introduce the braking fluid into a fluid channel inside the sensing unit, install a strain structure on the sensing surface on the outer side of the sensing unit, and receive and convert the braking fluid pressure transmitted to the sensing surface through the strain structure, thereby enabling real-time monitoring of the braking pressure. However, in conventional pressure sensors, the sensing unit is mostly manufactured by adopting a powder-type structure, and a processing hole is opened on one side of the sensing unit facing away from the sensing surface. Then, processing is performed on the inner surface of the fluid channel corresponding to the sensing surface through the processing hole to make the wall thickness of the sensing unit at the sensing surface uniform, and then the processing hole is blocked again with a welded sealing member to realize sealing of the fluid channel. However, adopting a powder-type sensing unit results in relatively high production costs, and the manufacturing process becomes more complex due to the introduction of welding, in addition to the risk of welding leakage. During the welding process, the sensing unit is easily affected by the welding process and detects welding stress, causing drift in the output of the sensing unit, which affects the detection precision of the pressure sensor; furthermore, during the operation of the pressure sensor, thermal stress is easily generated because the materials of the sealing member and the sensing unit are different and have different coefficients of thermal expansion, further reducing the detection precision of the pressure sensor and lowering the practicality and reliability of the pressure sensor. In order to more clearly explain the embodiments of the present application or technical methods among the prior art, a brief introduction to the attached drawings necessary for describing the embodiments or prior art will be provided below. The attached drawings described below are merely embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the structures depicted in these attached drawings without any labor of inventive step. FIG. 1 is a schematic diagram of the structure of one embodiment of the pressure sensor of the present application; FIG. 2 is an exploded view of the structure of one embodiment of the pressure sensor of FIG. 1; FIG. 3 is a cross-sectional view of one embodiment of the pressure sensor of FIG. 1; FIG. 4 is a schematic diagram of the structure of a sensing unit of one embodiment of the pressure sensor of FIG. 1; FIG. 5 is a cross-sectional view of one embodiment of the sensing unit of FIG. 4; FIG. 6 is a cross-sectional view at AA in FIG. 5; FIG. 7 illustrates an exploded schematic diagram of the pressure sensor of the present application; FIG. 8 shows a schematic diagram of the overall structure of the pressure sensor of the present application; FIG. 9 shows a front cross-sectional view of the pressure sensor of the present application; FIG. 10 shows a partial enlarged view of FIG. 9; FIG. 11 shows an overhead schematic diagram of the cover body of the pressure sensor of the present application; FIG. 12 shows a schematic bottom view of the cover body of the pressure sensor of the present application; FIG. 13 shows a schematic diagram of the structure of a part of the pressure sensor of the present application. The realization of the purpose, functional features, and advantages of the present application will be further explained with reference to the attached drawings in conjunction with embodiments. Below, a clear and complete description of the technical solutions in the embodiments of this application will be provided in conjunction with the attached drawings. It will be apparent that the described embodiments are merely a part of the embodiments of this application and not the entirety of the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person skilled in the art without inventive labor fall within the scope of protection of this application. In the embodiments of the present application, all directional indications (e.g., up, down, left, right, front, back, etc.) are intended merely to interpret the relative positional relationship, mov