WO2024124767A1 - Pressure sensor - Google Patents

Pressure sensor Download PDF

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Publication number
WO2024124767A1
WO2024124767A1 PCT/CN2023/089938 CN2023089938W WO2024124767A1 WO 2024124767 A1 WO2024124767 A1 WO 2024124767A1 CN 2023089938 W CN2023089938 W CN 2023089938W WO 2024124767 A1 WO2024124767 A1 WO 2024124767A1
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WO
WIPO (PCT)
Prior art keywords
pressure
pressure sensor
sensor according
proximal end
clamping
Prior art date
Application number
PCT/CN2023/089938
Other languages
French (fr)
Chinese (zh)
Inventor
吴登峰
王小平
李凡亮
曹万
李兵
施涛
Original Assignee
武汉飞恩微电子有限公司
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Application filed by 武汉飞恩微电子有限公司 filed Critical 武汉飞恩微电子有限公司
Publication of WO2024124767A1 publication Critical patent/WO2024124767A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges

Definitions

  • the present application relates to the field of sensor technology, and in particular to a pressure sensor.
  • Air suspension is an important part of the automobile vibration reduction system, and its core component is the air spring.
  • the pressure of the air spring can be controlled by a compressor and a valve, and its pressure can be monitored by a pressure sensor to adapt to different road conditions and driving habits.
  • the vibration amplitude of the pressure sensor used in the air suspension is larger, which can easily lead to loose bonding/adhesion of the sensor components, especially when the circuit board and the supporting element are pressed/adhesed rather than fully fixed for the purpose of higher manufacturing efficiency.
  • the housing of the pressure sensor is connected to the terminal, there may be problems with sealing, and on the other hand, there are high requirements for the longitudinal dimensions of the housing and the components inside the housing.
  • the present application provides a pressure sensor, which can improve the rapid and firm connection of some components of the pressure sensor.
  • a pressure sensor comprising:
  • a pressure joint having a longitudinally extending pressure channel therein;
  • the pressure sensitive head has a distal end which is recessed inward to form a connecting tube with a sensing cavity facing the distal end, and a proximal end thereof forms an elastic diaphragm.
  • a pressure measuring circuit is arranged on the proximal end surface of the elastic diaphragm.
  • the proximal end of the connecting tube is sealedly connected to the pressure joint so that the proximal end of the pressure channel is connected to the sensing cavity.
  • a terminal button and a housing that together with the pressure connector enclose a mounting cavity, wherein the proximal end and the distal end of the housing are sealedly connected to the terminal button and the pressure connector in a one-to-one correspondence;
  • a support seat and a signal processing component are arranged in the installation cavity, wherein the signal processing component has a circuit board clamped on the proximal end of the support seat, and the circuit board is electrically connected to the pressure measurement circuit;
  • the proximal end of the housing presses the terminal button, the circuit board and the support seat onto the pressure connector in sequence toward the distal end.
  • the circuit board is connected to the pressure measurement circuit via a flexible board.
  • the proximal end of the support seat protrudes outward to form a plurality of groups of clips
  • the distal end of the end button forms a plurality of first clips correspondingly, and each group of clips is correspondingly clipped into the first clips.
  • each group of clamping feet includes two clamping feet adjacently arranged in the circumferential direction of the support seat, and the two clamping feet of each group are respectively flexibly deformed and circumferentially abutted against the side wall of the corresponding first clamping opening on the circumferential corresponding side.
  • a second electrical connection portion is connected to the circuit board, and an outer end of the second electrical connection portion is electrically connected to the metal shell toward the distal side; a passing gap is left between two pins of one set of pins for the second electrical connection portion to pass through.
  • the clamping foot includes a longitudinally extending base and a protrusion formed by protruding laterally from the proximal end of the base toward the back side away from the clamping foot of the same group, the back side of the protrusion of the two clamping feet of the same group is pressed against the corresponding first clamping hole of the terminal button, and the back side of the base of the two clamping feet of the same group is pressed against the corresponding second clamping hole on the circuit board.
  • the distal end of the protrusion abuts against the proximal end surface of the circuit board toward the distal end side.
  • the longitudinal proximal end of the pressure connector and the portion close to the proximal end thereof respectively protrude laterally outward to form a flange and a supporting connecting ring
  • the connecting tube is fitted onto the flange, and is supported and welded to the supporting connecting ring; the flange, the supporting connecting ring and the connecting tube form an annular cavity.
  • a connecting pipe connected to a container or pipeline to be tested is provided at the distal end of the pressure connector.
  • a positioning structure for circumferential positioning with the container or pipe to be tested is disposed on the side of the pressure connector.
  • the inner diameter of the proximal end of the pressure channel gradually expands to form a bell mouth.
  • the pressure channel is a stepped hole with the diameter increasing from near to far.
  • the shell includes a cylindrical shell extending longitudinally and hermetically connected to the pressure joint at the distal end, and a circle of pressing edge formed by vertically gathering the longitudinal proximal end of the cylindrical shell inward; the pressing edge is pressed against the pressure area formed by the periphery of the terminal button toward the distal side, thereby pressing the terminal button, the circuit board, and the support seat onto the pressure joint in turn.
  • a sealing ring is provided at the pressure area, and the pressing edge presses the sealing ring, the terminal button, the circuit board and the support seat onto the pressure joint in sequence toward the distal end.
  • the distal end of the cartridge shell is abutted against and welded to the pressure connector toward the distal end.
  • the electrical connector is an elastic member.
  • a conditioning element is disposed on the distal side of the circuit board; a plurality of first electrical connection parts are disposed on the proximal side of the conditioning element; and a terminal button is passed through the distal end of the electrical connector and then pressed against and electrically contacted with the first electrical connection parts.
  • the electrical connector is a conductive spring having two sections with different coiling outer diameters, a conical transition section is formed between the two sections of the conductive spring, a retaining cavity for accommodating the conductive spring is correspondingly formed on the end button, the retaining cavity has a corresponding conical clamping portion, and the clamping portion presses the transition section toward the distal side against the first electrical connector.
  • the pressure measurement circuit includes an insulating layer covering and connected to the proximal surface of the elastic diaphragm and a Wheatstone bridge composed of measuring elements disposed on the surface of the insulating layer.
  • the pressure sensor of the present application can improve the rapid and firm connection of some components of the pressure sensor.
  • FIG1 is a front view of a pressure sensor according to a preferred embodiment of the present invention.
  • FIG2 is a cross-sectional view of a pressure sensor according to a preferred embodiment of the present application of the present invention along the line A-A in FIG1 ;
  • FIG3 is a three-dimensional diagram of a pressure sensor according to a preferred embodiment of the present invention (the housing and the support base are hidden);
  • FIG4 is a perspective schematic diagram of a pressure measurement component and a signal processing component according to a preferred embodiment of the present invention.
  • FIG5 is a three-dimensional view of a support base according to a preferred embodiment of the present invention.
  • pressure connector 100. pressure channel; 101. connecting pipe; 102. small diameter section; 103. large diameter section; 105. supporting connecting ring; 106. flange; 107. ring cavity; 108. positioning recess; 109. stress isolation groove; 110. supporting step; 111a. second positioning ring; 111b. first positioning ring; 112. first longitudinal positioning groove; 113. straight edge; 114. pressure measurement circuit; 2. pressure sensitive head; 201. metal base; 202. connecting tube; 203. sensing cavity; 204. elastic diaphragm; 3. terminal button; 301. second longitudinal positioning groove; 302. positioning recess; 304. pressing part; 305. holding cavity; 306. pressure zone; 307. second bayonet; 4.
  • the terms "installed”, “connected” and “connected” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • the pressure sensor of this embodiment uses such a pressure measurement component, which includes a pressure connector 1 and a pressure sensitive head 2.
  • a pressure channel 100 extending in the longitudinal direction (i.e., the up and down direction in the figure) is provided in the pressure connector 1.
  • the longitudinal distal end (i.e., the lower side in the figure) of the pressure sensitive head 2 is recessed inward to form a connecting tube 202 having a sensing cavity 203 facing the distal end, and the longitudinal proximal end of the pressure sensitive head 2 is correspondingly formed with an elastic diaphragm 204.
  • a pressure measurement circuit 114 is provided on the surface of the longitudinal proximal end of the elastic diaphragm 204.
  • the proximal end of the connecting tube 202 is sealedly connected to the pressure connector 1 so that the proximal end of the pressure channel 100 is connected to the sensing cavity 203.
  • the distal end of the pressure connector 1 is provided with a connecting pipe 101 connected to a container or pipeline to be measured.
  • the side of the pressure connector 1 can be provided with a positioning structure for connecting to a container or pipeline of a fluid to be measured, such as a positioning notch 108 or a straight edge 113, to facilitate circumferential positioning when connected to the pipeline or container to be measured.
  • the pressure measurement circuit 114 includes an insulating layer covering and connected to the proximal surface of the elastic diaphragm 204 and a Wheatstone bridge composed of measuring elements (such as thick film varistors or strain gauges) disposed on the surface of the insulating layer.
  • measuring elements such as thick film varistors or strain gauges
  • the proximal end of the connecting tube 202 is welded (for example, by laser welding) to the pressure connector 1.
  • the pressure measuring assembly of this embodiment is configured to have a split structure for the pressure connector 1 and the pressure sensitive head 2, and to connect them together by welding, thereby partially isolating the assembly stress of the pressure connector during installation.
  • the longitudinal proximal end of the pressure joint 1 protrudes outwardly to form a flange 106, and the portion of the pressure joint 1 near the proximal end protrudes outwardly to form a supporting connection ring 105.
  • the connecting tube 202 is sleeved on the flange 106, and supported and welded on the supporting connection ring 105.
  • the flange 106, the supporting connection ring 105 and the connecting tube 202 form an annular cavity 107. In this way, the collapsed welding slag can be concentratedly accommodated by the annular cavity during welding, thereby preventing the welding slag from blocking the pressure channel.
  • the inner diameter of the proximal end of the pressure channel 100 can be gradually expanded to form a bell mouth (not shown).
  • the pressure channel 100 can be a stepped hole with increasing aperture from near to far, for example, it can be formed by connecting a small diameter section 102 on the proximal side and a large diameter section 103 on the distal side, so that the pressure fluid can easily enter the sensing cavity 203.
  • the pressure sensor includes, in addition to the above-mentioned pressure measurement assembly, a housing 7, a terminal 3, a support seat 4 and a signal processing assembly 5.
  • the housing 7 includes a cylindrical shell 701 extending longitudinally and sealed at the distal end to the pressure connector 1, and a circle of pressing edges 702 formed by the longitudinal proximal end of the cylindrical shell 701 vertically contracting toward the inside.
  • the pressing edge 202 is pressed against the pressure zone 306 (e.g., a step surface) formed on the periphery of the terminal 3 toward the distal end, thereby pressing the terminal 3, the circuit board 500 and the support seat 4 onto the pressure connector 1 in sequence.
  • a sealing ring 8 is provided at the pressure zone 306, that is, the pressing edge 202 presses the sealing ring 8, the terminal 3, the circuit board 500 and the support seat 4 onto the pressure connector 1 in sequence toward the distal end, so that the sealing between the proximal end of the housing 7 and the terminal 3 can be enhanced, and at the same time, the matching tolerance requirements of the housing 7 and the terminal 3 can be reduced, making assembly more convenient.
  • the distal end of the cylinder shell 701 is abutted and welded to the pressure connector 1 toward the distal end.
  • the terminal 3, the housing 7 and the pressure connector 1 together form a mounting cavity 400.
  • the support seat 4 and the signal processing component 5 are both arranged in the mounting cavity 400.
  • the signal processing component 5 is arranged on the support seat 4 and is electrically connected to the pressure measurement circuit 114.
  • the signal after the signal processing component 5 is output to the outside through a plurality of electrical connectors 6, and one end of the electrical connector 6 passes through the terminal 3 toward the distal end and is electrically connected to the signal processing component 5.
  • the signal processing component 5 includes a circuit board 500 disposed laterally on the proximal side of the support base 4, and electronic components such as a conditioning element 504 are disposed on the distal side of the circuit board 500.
  • the circuit board 500 is connected (for example, by soldering) to the pressure measurement circuit 114 via a third electrical connection portion 502 disposed on the flexible board 501.
  • a plurality of first electrical connection portions 503 are disposed on the proximal side of the conditioning element 504.
  • the pressure sensor of this embodiment also includes a plurality of (four in the figure and distributed in a rectangular shape) electrical connectors 6 for outputting the signal obtained after processing by the signal processing component 5 to an external device.
  • the electrical connector 6 may be an elastic member, such as a conductive spring, the distal end of which may be passed through the terminal button 3 and then pressed against and electrically contacted with the first electrical connection portion 503.
  • the electrical connector 6 is a conductive spring having two sections with different outer diameters of winding, a tapered transition section 601 is formed between the two sections, and a holding cavity 305 for accommodating the conductive spring 6 is correspondingly formed on the terminal button 3, the holding cavity 305 having a corresponding tapered pressing portion 304, and the pressing portion 304 presses the transition section 601 against the first electrical connection portion 503 toward the distal end.
  • the support seat 4 includes a pressing cylinder 401, which is sealed and welded to a support step 110 formed on the pressure joint 1 toward the distal end.
  • a transverse plate 412 is provided at the proximal end of the inner cavity of the pressing cylinder 401 to enhance the structural strength of the support seat 4; at the same time, the transverse plate 412 and the proximal end of the pressing cylinder 401 form a receiving cavity 407 that can accommodate electronic components on the circuit board 500.
  • a first clearance opening 409 that can accommodate the flexible board 501 is provided on the transverse plate 412, and a second clearance opening 406 that can accommodate the flexible board 501 is provided on the pressing cylinder 401.
  • the inner wall of the proximal end of the support seat 4 can be recessed inward to form a clearance groove 405 for avoiding the third electrical connection part 502.
  • a through opening 410 is provided on each of the two opposite side walls of the pressing cylinder 401 in the circumferential direction, so as to reduce the material usage of the support seat 4 while meeting the strength requirements.
  • the through opening 410 can be staggered with the second clearance opening 406 in the circumferential direction.
  • the two circumferentially opposite positions of the terminal button 3 are each contracted inward and enclose a cavity 308 between the circuit board 500, so that the electronic components on the proximal side surface of the circuit board 500 can be arranged in the cavity 308, and the proximal middle part of the terminal button 3 is pressed against the proximal end surface of the circuit board 500. This can satisfy the arrangement requirements of the electrical connector 6 while leaving space for the arrangement of the electronic components.
  • the proximal end of the support seat 4 protrudes outward (i.e., the proximal side) to form a group of two first clamping pins 402a and another group of two first clamping pins 402b.
  • the distal end of the terminal button 3 forms a first clamping hole 506a and a first clamping hole 506b that are opposite to each other in the circumferential direction.
  • the two first clamping pins 402a are correspondingly clamped in the first clamping hole 506a, and the two first clamping pins 402b are correspondingly clamped in the first clamping hole 506a.
  • the two first clamping pins 402a are respectively deformed by flexibility and are circumferentially close to the side wall of the corresponding first clamping hole on the circumferential side.
  • the first clamping pins 402b and 402a may both include a base extending longitudinally and a protrusion 414 formed by the proximal end of the base 413 protruding laterally toward the back side away from the clamping pins of the same group.
  • the back side of the protrusion 414 of the two clamping pins of the same group is pressed against the first clamping opening correspondingly opened on the terminal button 3.
  • the back side of the base 413 of the two clamping pins of the same group is pressed against the second clamping opening 307 correspondingly opened on the circuit board 500.
  • the clamping pin can clamp the circuit board 500 through the base and clamp the terminal button 3 through the protrusion 414, so that the connection is more secure.
  • the distal end of the protrusion 414 is pressed against the proximal end surface of the circuit board 500 toward the distal side, so as to prevent the circuit board 500 from detaching from the proximal end surface of the support seat 4 toward the distal side.
  • the lower periphery of the supporting connecting ring 105 can protrude outward to form a second positioning ring 111a and a first positioning ring 111b spaced apart from each other.
  • the second positioning ring 111a and the first positioning ring 111b are sleeved in cooperation with each other at the bottom and the lower part of the inner cavity of the pressing cylinder 401.
  • a stress isolation groove 109 is formed between the first positioning ring 111b and the second positioning ring 111a. In this way, the pressing cylinder 401 can be positioned in cooperation with each other at the bottom and the lower part.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A pressure sensor. The pressure sensor comprises: a pressure joint (1), internally provided with a longitudinally extending pressure passage (100); a pressure sensitive head (2), wherein the longitudinal distal side of the pressure sensitive head (2) is recessed inwards to form a connecting cylinder (202) having a sensing cavity (203) facing the distal side, an elastic diaphragm (204) is correspondingly formed on the longitudinal proximal side of the pressure sensitive head (2), a pressure measurement circuit (114) is provided on the surface of the longitudinal proximal side of the elastic diaphragm (204), and the proximal end of the connecting cylinder (202) is sealedly connected to the pressure joint (1), so that the proximal end of the pressure passage (100) is communicated with the sensing cavity (203); an end cap (3) and a housing (7) that define a mounting cavity together with the pressure joint (1), the proximal end and the distal end of the housing (7) being sealedly connected to the end cap (3) and the pressure joint (1) in one-to-one correspondence; a support base (4) and a signal processing component (5) arranged in the mounting cavity (400), the signal processing component (5) being provided with a circuit board (500) in snap-fit to the proximal end of the support base (4), and the circuit board (500) being electrically connected to the pressure measurement circuit (114); and a plurality of electrical connectors (6) electrically connected to the circuit board (500) after passing through the end cap (3).

Description

压力传感器Pressure Sensor 技术领域Technical Field
本申请涉及传感器技术领域，具体涉及一种压力传感器。The present application relates to the field of sensor technology, and in particular to a pressure sensor.
背景技术Background technique
空气悬架是汽车减振***的重要组成部分，其核心组成为空气弹簧。空气弹簧的压力可通过压缩机和阀门进行控制，并通过压力传感器对其压力进行监测，以适应不同路况和驾驶习惯。Air suspension is an important part of the automobile vibration reduction system, and its core component is the air spring. The pressure of the air spring can be controlled by a compressor and a valve, and its pressure can be monitored by a pressure sensor to adapt to different road conditions and driving habits.
发明概述SUMMARY OF THE INVENTION
相比于车身，用于空气悬架的压力传感器振动幅度更大，因此容易导致传感器的部件结合/粘接不牢，特别是在出于更高制造效率的目的而对电路板和支撑元件进行压紧/粘接而非完全固定时更是如此。另外，压力传感器的壳体在与端钮进行连接时，一是密封性可能存在问题，另一方面需要对壳体与壳体内的各部件的纵向尺寸有较高要求。Compared with the vehicle body, the vibration amplitude of the pressure sensor used in the air suspension is larger, which can easily lead to loose bonding/adhesion of the sensor components, especially when the circuit board and the supporting element are pressed/adhesed rather than fully fixed for the purpose of higher manufacturing efficiency. In addition, when the housing of the pressure sensor is connected to the terminal, there may be problems with sealing, and on the other hand, there are high requirements for the longitudinal dimensions of the housing and the components inside the housing.
本部分中的陈述仅提供与本发明本申请相关的背景信息并且可以不构成现有技术。The statements in this section merely provide background information related to the present invention and application and may not constitute prior art.
本申请提供了一种压力传感器，能够提高压力传感器的部分部件进行快速、牢固的连接。The present application provides a pressure sensor, which can improve the rapid and firm connection of some components of the pressure sensor.
为实现上述目的，本发明本申请提供如下技术方案：一种压力传感器，其包括：To achieve the above objectives, the present invention provides the following technical solution: a pressure sensor, comprising:
压力接头，其内设有纵向延伸的压力通道；A pressure joint having a longitudinally extending pressure channel therein;
压力敏感头，其纵向远端一侧朝内凹陷形成具有一朝向远端一侧的感测腔的一连接筒，其纵向近端一侧相应形成弹性膜片，弹性膜片的纵向近端一侧表面设置有压力测量电路，连接筒的近端与压力接头密封连接以使压力通道的近端连通至感测腔；The pressure sensitive head has a distal end which is recessed inward to form a connecting tube with a sensing cavity facing the distal end, and a proximal end thereof forms an elastic diaphragm. A pressure measuring circuit is arranged on the proximal end surface of the elastic diaphragm. The proximal end of the connecting tube is sealedly connected to the pressure joint so that the proximal end of the pressure channel is connected to the sensing cavity.
与压力接头一起合围形成安装腔的端钮和壳体，壳体的近端和远端一一对应地密封地连接于端钮和压力接头上；A terminal button and a housing that together with the pressure connector enclose a mounting cavity, wherein the proximal end and the distal end of the housing are sealedly connected to the terminal button and the pressure connector in a one-to-one correspondence;
设置于安装腔内的支撑座及信号处理组件，信号处理组件具有卡接于支撑座近端上的一电路板，电路板与压力测量电路电连接；A support seat and a signal processing component are arranged in the installation cavity, wherein the signal processing component has a circuit board clamped on the proximal end of the support seat, and the circuit board is electrically connected to the pressure measurement circuit;
及多个电连接件，其穿设端钮后电连接至电路板。And a plurality of electrical connectors are provided, which are electrically connected to the circuit board after passing through the terminals.
优选地在一些实施中，壳体的近端朝远端一侧依次将端钮、电路板及支撑座压紧于压力接头上。Preferably, in some implementations, the proximal end of the housing presses the terminal button, the circuit board and the support seat onto the pressure connector in sequence toward the distal end.
优选地在一些实施中，电路板通过柔性板连接至压力测量电路。Preferably in some implementations, the circuit board is connected to the pressure measurement circuit via a flexible board.
优选地在一些实施中，支撑座的近端朝外凸伸形成多组卡脚，端钮的远端对应形成多个第一卡口，每组卡脚对应地卡接于所述第一卡口内。Preferably, in some implementations, the proximal end of the support seat protrudes outward to form a plurality of groups of clips, and the distal end of the end button forms a plurality of first clips correspondingly, and each group of clips is correspondingly clipped into the first clips.
优选地在一些实施中，每组卡脚包括在支撑座的周向上邻近设置的两个卡脚，每组的两个卡脚分别通过挠性变形后朝周向抵接于对应的第一卡口的周向对应一侧的侧壁上。Preferably, in some implementations, each group of clamping feet includes two clamping feet adjacently arranged in the circumferential direction of the support seat, and the two clamping feet of each group are respectively flexibly deformed and circumferentially abutted against the side wall of the corresponding first clamping opening on the circumferential corresponding side.
优选地在一些实施中，电路板上连接有一第二电连接部，第二电连接部的外端朝远端一侧电触接于金属制的壳体上；其中的一组卡脚的两个卡脚之间留有供第二电连接部通过的通过间隙。Preferably, in some implementations, a second electrical connection portion is connected to the circuit board, and an outer end of the second electrical connection portion is electrically connected to the metal shell toward the distal side; a passing gap is left between two pins of one set of pins for the second electrical connection portion to pass through.
优选地在一些实施中，卡脚包括纵向延伸的基部及由基部的近端朝远离同组卡脚的背向一侧横向突出形成的突部，同组的两个卡脚的突部的背向一侧抵紧于端钮的对应开设的第一卡口上，同组的两个卡脚的基部的背向一侧抵紧于电路板上对应开设的第二卡口上。Preferably, in some implementations, the clamping foot includes a longitudinally extending base and a protrusion formed by protruding laterally from the proximal end of the base toward the back side away from the clamping foot of the same group, the back side of the protrusion of the two clamping feet of the same group is pressed against the corresponding first clamping hole of the terminal button, and the back side of the base of the two clamping feet of the same group is pressed against the corresponding second clamping hole on the circuit board.
优选地在一些实施中，突部的远端朝远端一侧抵接于电路板的近端端面上。Preferably, in some implementations, the distal end of the protrusion abuts against the proximal end surface of the circuit board toward the distal end side.
优选地在一些实施中，压力接头的纵向近端及其靠近近端的部分别朝外横向凸伸形成凸缘及支撑连接环，连接筒配合套设于凸缘上，且支撑并焊接于支撑连接环上；凸缘、支撑连接环及连接筒围成环腔。Preferably, in some implementations, the longitudinal proximal end of the pressure connector and the portion close to the proximal end thereof respectively protrude laterally outward to form a flange and a supporting connecting ring, the connecting tube is fitted onto the flange, and is supported and welded to the supporting connecting ring; the flange, the supporting connecting ring and the connecting tube form an annular cavity.
在一些实施中，压力接头的远端设有与待测容器或管道连接的连接管。In some implementations, a connecting pipe connected to a container or pipeline to be tested is provided at the distal end of the pressure connector.
在一些实施中，压力接头的侧部设置有用于与所述待测容器或管道进行周向定位的定位结构。In some implementations, a positioning structure for circumferential positioning with the container or pipe to be tested is disposed on the side of the pressure connector.
在一些实施中，压力通道近端的内径逐渐扩大形成喇叭口。In some implementations, the inner diameter of the proximal end of the pressure channel gradually expands to form a bell mouth.
在一些实施中，压力通道为自近及远孔径依次增大的阶梯孔。In some implementations, the pressure channel is a stepped hole with the diameter increasing from near to far.
在一些实施中，壳体包括纵向延伸且远端密封连接于压力接头上的筒壳以及由筒壳的纵向近端朝内侧垂直收拢形成的一圈压边；压边朝远端一侧压紧于端钮周缘形成的受压区上，从而依次将端钮、电路板、支撑座压紧于压力接头上。In some embodiments, the shell includes a cylindrical shell extending longitudinally and hermetically connected to the pressure joint at the distal end, and a circle of pressing edge formed by vertically gathering the longitudinal proximal end of the cylindrical shell inward; the pressing edge is pressed against the pressure area formed by the periphery of the terminal button toward the distal side, thereby pressing the terminal button, the circuit board, and the support seat onto the pressure joint in turn.
在一些实施中，受压区处设有密封圈，压边朝远端一侧依次将密封圈、端钮、电路板及支撑座压紧于压力接头上。In some implementations, a sealing ring is provided at the pressure area, and the pressing edge presses the sealing ring, the terminal button, the circuit board and the support seat onto the pressure joint in sequence toward the distal end.
在一些实施中，筒壳的远端朝远端一侧抵接并焊接于压力接头上。In some implementations, the distal end of the cartridge shell is abutted against and welded to the pressure connector toward the distal end.
在一些实施中，电连接件为弹性件。In some implementations, the electrical connector is an elastic member.
在一些实施中，电路板的远端一侧设置有调理元件；调理元件的近端一侧设置有多个第一电连接部；电连接件远端穿设端钮后抵压并电接触于第一电连接部上。In some implementations, a conditioning element is disposed on the distal side of the circuit board; a plurality of first electrical connection parts are disposed on the proximal side of the conditioning element; and a terminal button is passed through the distal end of the electrical connector and then pressed against and electrically contacted with the first electrical connection parts.
在一些实施中，电连接件为具有两段不同盘绕外径的导电弹簧，该两段导电弹簧之间形成锥形的过渡段，端钮上对应形成用于容纳导电弹簧的保持腔，保持腔具有一对应的锥形的压紧部，压紧部将过渡段朝远端一侧压抵于第一电连接部上。In some embodiments, the electrical connector is a conductive spring having two sections with different coiling outer diameters, a conical transition section is formed between the two sections of the conductive spring, a retaining cavity for accommodating the conductive spring is correspondingly formed on the end button, the retaining cavity has a corresponding conical clamping portion, and the clamping portion presses the transition section toward the distal side against the first electrical connector.
在一些实施中，压力测量电路包括覆盖连接于弹性膜片近端表面的绝缘层及由设置于绝缘层表面的测量元件所组成的惠斯通电桥。In some implementations, the pressure measurement circuit includes an insulating layer covering and connected to the proximal surface of the elastic diaphragm and a Wheatstone bridge composed of measuring elements disposed on the surface of the insulating layer.
有益效果Beneficial Effects
本申请的压力传感器能够提高压力传感器的部分部件进行快速、牢固的连接。The pressure sensor of the present application can improve the rapid and firm connection of some components of the pressure sensor.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明本申请一优选实施例的压力传感器的主视图；FIG1 is a front view of a pressure sensor according to a preferred embodiment of the present invention;
图2为本发明本申请一优选实施例的压力传感器沿图1中的所示A-A的剖视图；FIG2 is a cross-sectional view of a pressure sensor according to a preferred embodiment of the present application of the present invention along the line A-A in FIG1 ;
图3为本发明本申请一优选实施例的压力传感器的立体图（隐去了外壳和支撑座）；FIG3 is a three-dimensional diagram of a pressure sensor according to a preferred embodiment of the present invention (the housing and the support base are hidden);
图4为本发明本申请一优选实施例的压力测量组件和信号处理组件的立体示意图；FIG4 is a perspective schematic diagram of a pressure measurement component and a signal processing component according to a preferred embodiment of the present invention;
图5为本发明本申请一优选实施例的支撑座的立体图；FIG5 is a three-dimensional view of a support base according to a preferred embodiment of the present invention;
图中：1、压力接头；100、压力通道；101、连接管；102、小径段；103、大径段；105、支撑连接环；106、凸缘；107、环腔；108、定位凹口；109、应力隔离槽；110、支撑台阶；111a、第二定位环；111b、第一定位环；112、第一纵向定位槽；113、平直边；114、压力测量电路；2、压力敏感头；201、金属基座；202、连接筒；203、感测腔；204、弹性膜片；3、端钮；301、第二纵向定位槽；302、定位凹部；304、压紧部；305、保持腔；306、受压区；307、第二卡口；4、支撑座；400、安装腔；401、压筒；402a、第一卡脚；402b、第二卡脚；403、通过间隙；405、让位槽；406、第二让位口；407、容纳腔；308、凹腔；409、第一让位口；410、通口；411、纵向定位楞；412、横板；413、基部；414、突部；5、信号处理组件；500、电路板；501、柔性板；502、第三电连接部；503、第一电连接部；504、调理元件；505、第二电连接部；506a、第一卡口；506b、第一卡口；6、电连接件；601、过渡段；7、壳体；701、筒壳；702、压边；8、密封圈。In the figure: 1. pressure connector; 100. pressure channel; 101. connecting pipe; 102. small diameter section; 103. large diameter section; 105. supporting connecting ring; 106. flange; 107. ring cavity; 108. positioning recess; 109. stress isolation groove; 110. supporting step; 111a. second positioning ring; 111b. first positioning ring; 112. first longitudinal positioning groove; 113. straight edge; 114. pressure measurement circuit; 2. pressure sensitive head; 201. metal base; 202. connecting tube; 203. sensing cavity; 204. elastic diaphragm; 3. terminal button; 301. second longitudinal positioning groove; 302. positioning recess; 304. pressing part; 305. holding cavity; 306. pressure zone; 307. second bayonet; 4. support Seat; 400, mounting cavity; 401, pressing cylinder; 402a, first clamping foot; 402b, second clamping foot; 403, passing gap; 405, making way groove; 406, second making way opening; 407, accommodating cavity; 308, concave cavity; 409, first making way opening; 410, through opening; 411, longitudinal positioning rib; 412, transverse plate; 413, base; 414, protrusion; 5, signal processing component; 500, circuit board; 501, flexible board; 502, third electrical connection part; 503, first electrical connection part; 504, conditioning element; 505, second electrical connection part; 506a, first clamping mouth; 506b, first clamping mouth; 6, electrical connector; 601, transition section; 7, shell; 701, cylinder shell; 702, pressing edge; 8, sealing ring.
本发明的实施方式Embodiments of the present invention
下面将结合附图对本发明本申请的技术方案进行清楚、完整地描述。下列的实施例是示例性的，仅用于解释本发明本申请，而不能解释为对本发明本申请的限制。在以下描述中，相同的标记用于表示相同或等效的元件，并且省略重复的描述。The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The following embodiments are exemplary and are only used to explain the present invention and the present application, and cannot be interpreted as limiting the present invention and the present application. In the following description, the same reference numerals are used to represent the same or equivalent elements, and repeated descriptions are omitted.
在本发明本申请的描述中，需要理解的是，术语“上”、“下”、“内”、“外”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位置关系，或者是本领域技术人员惯常理解的方位或位置关系，仅是为了便于描述本发明本申请和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明本申请的限制。In the description of the present invention and this application, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing the present invention and this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention and this application.
另外，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以视具体情况理解上述术语在本发明本申请中的具体含义。In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application of the present invention can be understood according to specific circumstances.
还应当进一步理解，在本发明本申请说明书和对应的权利要求书中使用的术语“和/或”是指所列出的项中的一个或多个的任何组合以及所有可能组合。It should be further understood that the term “and/or” used in the present specification and corresponding claims of the present invention refers to any combination and all possible combinations of one or more of the listed items.
如图2所示。本实施例的压力传感器，其使用这样一种压力测量组件，压力测量组件包括压力接头1和压力敏感头2。其中，压力接头1内设有纵向（即附图中的上下方向）延伸的压力通道100。压力敏感头2的纵向远端（即附图中的下方）一侧朝内凹陷形成具有朝向远端的一感测腔203的连接筒202，压力敏感头2的纵向近端一侧相应形成弹性膜片204。弹性膜片204的纵向近端一侧表面设置有压力测量电路114。连接筒202的近端与压力接头1密封连接以使压力通道100的近端连通至感测腔203。压力接头1的远端设有与待测容器或管道等连接的连接管101。压力接头1的侧部可设置有用于与待测流体的容器或管道连接时的定位结构，例如定位凹口108或平直边113，以方便与待测管道或容器在连接时进行周向定位。As shown in FIG2 . The pressure sensor of this embodiment uses such a pressure measurement component, which includes a pressure connector 1 and a pressure sensitive head 2. Among them, a pressure channel 100 extending in the longitudinal direction (i.e., the up and down direction in the figure) is provided in the pressure connector 1. The longitudinal distal end (i.e., the lower side in the figure) of the pressure sensitive head 2 is recessed inward to form a connecting tube 202 having a sensing cavity 203 facing the distal end, and the longitudinal proximal end of the pressure sensitive head 2 is correspondingly formed with an elastic diaphragm 204. A pressure measurement circuit 114 is provided on the surface of the longitudinal proximal end of the elastic diaphragm 204. The proximal end of the connecting tube 202 is sealedly connected to the pressure connector 1 so that the proximal end of the pressure channel 100 is connected to the sensing cavity 203. The distal end of the pressure connector 1 is provided with a connecting pipe 101 connected to a container or pipeline to be measured. The side of the pressure connector 1 can be provided with a positioning structure for connecting to a container or pipeline of a fluid to be measured, such as a positioning notch 108 or a straight edge 113, to facilitate circumferential positioning when connected to the pipeline or container to be measured.
较佳地，上述压力测量电路114包括覆盖连接于弹性膜片204近端表面的绝缘层及由设置于绝缘层表面的测量元件（例如厚膜压敏电阻，或者应变片）所组成的惠斯通电桥。Preferably, the pressure measurement circuit 114 includes an insulating layer covering and connected to the proximal surface of the elastic diaphragm 204 and a Wheatstone bridge composed of measuring elements (such as thick film varistors or strain gauges) disposed on the surface of the insulating layer.
其中，连接筒202的近端与压力接头1相焊接（例如激光焊接）。本实施例的压力测量组件，其通过将压力接头1和压力敏感头2设置为分体式结构，并通过焊接连成一体，从而实现压力接头在安装时的装配应力的部分隔离。The proximal end of the connecting tube 202 is welded (for example, by laser welding) to the pressure connector 1. The pressure measuring assembly of this embodiment is configured to have a split structure for the pressure connector 1 and the pressure sensitive head 2, and to connect them together by welding, thereby partially isolating the assembly stress of the pressure connector during installation.
在其他的一些实施例中，优选地，压力接头1的纵向近端朝外横向凸伸形成凸缘106，压力接头1的靠近近端的部分朝外横向凸伸形成支撑连接环105。连接筒202配合套设于凸缘106上，且支撑并焊接于支撑连接环105上。凸缘106、支撑连接环105及连接筒202围成环腔107。这样，在焊接时可以通过环腔集中容纳崩落的焊渣，从而避免焊渣堵压力通道。In some other embodiments, preferably, the longitudinal proximal end of the pressure joint 1 protrudes outwardly to form a flange 106, and the portion of the pressure joint 1 near the proximal end protrudes outwardly to form a supporting connection ring 105. The connecting tube 202 is sleeved on the flange 106, and supported and welded on the supporting connection ring 105. The flange 106, the supporting connection ring 105 and the connecting tube 202 form an annular cavity 107. In this way, the collapsed welding slag can be concentratedly accommodated by the annular cavity during welding, thereby preventing the welding slag from blocking the pressure channel.
在其他的一些实施例中，优选地，为便于在测量液体的压力时，使液体便于从感测腔内流出，压力通道100近端的内径可逐渐扩大形成喇叭口（未示出）。In some other embodiments, preferably, in order to facilitate the liquid to flow out of the sensing cavity when measuring the pressure of the liquid, the inner diameter of the proximal end of the pressure channel 100 can be gradually expanded to form a bell mouth (not shown).
上述的各实施例中，压力通道100可以为自近及远孔径依次增大的阶梯孔，例如可以由近端一侧的小径段102与远端一则的大径段103连接而成，这样可以便于压力流体进入感测腔203中。In the above-mentioned embodiments, the pressure channel 100 can be a stepped hole with increasing aperture from near to far, for example, it can be formed by connecting a small diameter section 102 on the proximal side and a large diameter section 103 on the distal side, so that the pressure fluid can easily enter the sensing cavity 203.
请结合参阅图1、图3～图4。在本发明本申请的一优选实施例中的压力传感器，除包括上述压力测量组件外，还包括壳体7、端钮3、支撑座4及信号处理组件5。其中，壳体7包括纵向延伸且远端密封连接于压力接头1上的筒壳701以及由筒壳701的纵向近端朝内侧垂直收拢形成的一圈压边702。压边202朝远端一侧压紧于端钮3周缘形成的受压区306（例如台阶面）上，从而依次将端钮3、电路板500、支撑座4压紧于压力接头1上。较佳地，受压区306处设有密封圈8，即压边202朝远端一侧依次将密封圈8、端钮3、电路板500及支撑座4压紧于压力接头1上，这样能够增强壳体7的近端与端钮3之间的密封性，同时，可以降低壳体7与端钮3的配合公差的要求，使装配更加方便。Please refer to Figures 1, 3 and 4. In a preferred embodiment of the present invention, the pressure sensor includes, in addition to the above-mentioned pressure measurement assembly, a housing 7, a terminal 3, a support seat 4 and a signal processing assembly 5. The housing 7 includes a cylindrical shell 701 extending longitudinally and sealed at the distal end to the pressure connector 1, and a circle of pressing edges 702 formed by the longitudinal proximal end of the cylindrical shell 701 vertically contracting toward the inside. The pressing edge 202 is pressed against the pressure zone 306 (e.g., a step surface) formed on the periphery of the terminal 3 toward the distal end, thereby pressing the terminal 3, the circuit board 500 and the support seat 4 onto the pressure connector 1 in sequence. Preferably, a sealing ring 8 is provided at the pressure zone 306, that is, the pressing edge 202 presses the sealing ring 8, the terminal 3, the circuit board 500 and the support seat 4 onto the pressure connector 1 in sequence toward the distal end, so that the sealing between the proximal end of the housing 7 and the terminal 3 can be enhanced, and at the same time, the matching tolerance requirements of the housing 7 and the terminal 3 can be reduced, making assembly more convenient.
筒壳701的远端朝远端一侧抵接并焊接于压力接头1上。端钮3、壳体7及压力接头1合围形成安装腔400。支撑座4及信号处理组件5均设置于安装腔400内。信号处理组件5设置于支撑座4上并电连接至压力测量电路114。由信号处理组件5处于后的信号经多个电连接件6向外输出，电连接件6的一端朝远端一侧穿设端钮3后电连接至信号处理组件5。The distal end of the cylinder shell 701 is abutted and welded to the pressure connector 1 toward the distal end. The terminal 3, the housing 7 and the pressure connector 1 together form a mounting cavity 400. The support seat 4 and the signal processing component 5 are both arranged in the mounting cavity 400. The signal processing component 5 is arranged on the support seat 4 and is electrically connected to the pressure measurement circuit 114. The signal after the signal processing component 5 is output to the outside through a plurality of electrical connectors 6, and one end of the electrical connector 6 passes through the terminal 3 toward the distal end and is electrically connected to the signal processing component 5.
其中，信号处理组件5包括横向地设置于支撑座4近端一侧的电路板500，电路板500的远端一侧设置有调理元件504等电子元件。电路板500通过柔性板501上设置有第三电连接部502连接（例如通过锡焊进行连接）至压力测量电路114。调理元件504的近端一侧设置有多个第一电连接部503。The signal processing component 5 includes a circuit board 500 disposed laterally on the proximal side of the support base 4, and electronic components such as a conditioning element 504 are disposed on the distal side of the circuit board 500. The circuit board 500 is connected (for example, by soldering) to the pressure measurement circuit 114 via a third electrical connection portion 502 disposed on the flexible board 501. A plurality of first electrical connection portions 503 are disposed on the proximal side of the conditioning element 504.
本实施例的压力传感器还包括用于将信号处理组件5处理后得到的信号输出至外部设备的多个（附图中示为四个，且呈矩形分布）电连接件6。电连接件6可为弹性件，例如导电弹簧，其远端可穿设端钮3后抵压并电接触于第一电连接部503上。较佳地，电连接件6为具有两段不同盘绕外径的导电弹簧，该两段部分之间形成锥形的过渡段601，端钮3上对应形成用于容纳导电弹簧6的保持腔305，保持腔305具有一对应的锥形的压紧部304，压紧部304将过渡段601朝远端一侧压抵于第一电连接部503上。The pressure sensor of this embodiment also includes a plurality of (four in the figure and distributed in a rectangular shape) electrical connectors 6 for outputting the signal obtained after processing by the signal processing component 5 to an external device. The electrical connector 6 may be an elastic member, such as a conductive spring, the distal end of which may be passed through the terminal button 3 and then pressed against and electrically contacted with the first electrical connection portion 503. Preferably, the electrical connector 6 is a conductive spring having two sections with different outer diameters of winding, a tapered transition section 601 is formed between the two sections, and a holding cavity 305 for accommodating the conductive spring 6 is correspondingly formed on the terminal button 3, the holding cavity 305 having a corresponding tapered pressing portion 304, and the pressing portion 304 presses the transition section 601 against the first electrical connection portion 503 toward the distal end.
请参合参阅图5。支撑座4包括一个压筒401，压筒401朝远端一侧密封焊接于压力接头1上形成的一支撑台阶110上。压筒401的内腔的近端设置有横板412，以增强支撑座4的结构强度；同时，横板412与压筒401的近端围成可容纳电路板500上的电子元件的容纳腔407。横板412上设置有可容柔性板501通过的第一让位口409，压筒401上对应可容柔性板501通过的第二让位口406。支撑座4的近端内壁可朝内凹陷形成用于避让第三电连接部502的让位槽405。压筒401的周向相对两侧壁上各设置有一个通口410，从而在满足强度需要的同时，降低支撑座4的材料使用。通口410可在周向上与第二让位口406错开。Please refer to FIG. 5. The support seat 4 includes a pressing cylinder 401, which is sealed and welded to a support step 110 formed on the pressure joint 1 toward the distal end. A transverse plate 412 is provided at the proximal end of the inner cavity of the pressing cylinder 401 to enhance the structural strength of the support seat 4; at the same time, the transverse plate 412 and the proximal end of the pressing cylinder 401 form a receiving cavity 407 that can accommodate electronic components on the circuit board 500. A first clearance opening 409 that can accommodate the flexible board 501 is provided on the transverse plate 412, and a second clearance opening 406 that can accommodate the flexible board 501 is provided on the pressing cylinder 401. The inner wall of the proximal end of the support seat 4 can be recessed inward to form a clearance groove 405 for avoiding the third electrical connection part 502. A through opening 410 is provided on each of the two opposite side walls of the pressing cylinder 401 in the circumferential direction, so as to reduce the material usage of the support seat 4 while meeting the strength requirements. The through opening 410 can be staggered with the second clearance opening 406 in the circumferential direction.
在其他的一些实施例中，优选地，端钮3的周向相对的两位置上各朝内收缩并电路板500之间围成凹腔308，从而可以将电路板500近端一侧表面的电子元件布置于凹腔308内，而使端钮3的近端中部抵压于电路板500的近端端面上，这样能够在满足电连接件6的布置需要的同时，留中电子元件的布置空间。In some other embodiments, preferably, the two circumferentially opposite positions of the terminal button 3 are each contracted inward and enclose a cavity 308 between the circuit board 500, so that the electronic components on the proximal side surface of the circuit board 500 can be arranged in the cavity 308, and the proximal middle part of the terminal button 3 is pressed against the proximal end surface of the circuit board 500. This can satisfy the arrangement requirements of the electrical connector 6 while leaving space for the arrangement of the electronic components.
为了便于端钮3、电路板500及支撑座4之间的定位和可靠连接，支撑座4的近端朝外（即近端一侧）凸伸形成一组共两个第一卡脚402a及另一组共两个第一卡脚402b。端钮3的远端对应形成周向相对的第一卡口506a和第一卡口506b。两个第一卡脚402a对应地卡接于第一卡口506a内，两个第一卡脚402b对应地卡接于第一卡口506a内。两个第一卡脚402a分别通过挠性变形后朝周向抵近于对应的第一卡口的周向对应一侧的侧壁上。In order to facilitate the positioning and reliable connection between the terminal button 3, the circuit board 500 and the support seat 4, the proximal end of the support seat 4 protrudes outward (i.e., the proximal side) to form a group of two first clamping pins 402a and another group of two first clamping pins 402b. The distal end of the terminal button 3 forms a first clamping hole 506a and a first clamping hole 506b that are opposite to each other in the circumferential direction. The two first clamping pins 402a are correspondingly clamped in the first clamping hole 506a, and the two first clamping pins 402b are correspondingly clamped in the first clamping hole 506a. The two first clamping pins 402a are respectively deformed by flexibility and are circumferentially close to the side wall of the corresponding first clamping hole on the circumferential side.
在其他的一些实施例中，优选地，电路板500上连接有一第二电连接部505。第二电连接部505的外端朝远端一侧电触接于金属制的壳体7上，从而便于通过壳体7进行接地。两个第二卡脚402b之间留有供第二电连接部505通过的通过间隙403。In some other embodiments, preferably, a second electrical connection portion 505 is connected to the circuit board 500. The outer end of the second electrical connection portion 505 is electrically connected to the metal housing 7 toward the distal end, so as to facilitate grounding through the housing 7. A passing gap 403 is reserved between the two second pins 402b for the second electrical connection portion 505 to pass through.
在其他的一些实施例中，优选地，第一卡脚402b、402a均可包括纵向延伸的基部及由基部413的近端朝远离同组卡脚的背向一侧横向突出形成的突部414。同组的两个卡脚的突部414的背向一侧抵紧于端钮3的对应开设的第一卡口上。同组的两个卡脚的基部413的背向一侧抵紧于电路板500上对应开设的第二卡口307上。这样，卡脚可通过基部卡紧电路板500，通过突部414卡紧端钮3，从而使连接更加牢固。较佳地，突部414的远端朝远端一侧抵接于电路板500的近端端面上，从而还可以防止电路板500朝远端一侧脱离支撑座4的近端端面。In some other embodiments, preferably, the first clamping pins 402b and 402a may both include a base extending longitudinally and a protrusion 414 formed by the proximal end of the base 413 protruding laterally toward the back side away from the clamping pins of the same group. The back side of the protrusion 414 of the two clamping pins of the same group is pressed against the first clamping opening correspondingly opened on the terminal button 3. The back side of the base 413 of the two clamping pins of the same group is pressed against the second clamping opening 307 correspondingly opened on the circuit board 500. In this way, the clamping pin can clamp the circuit board 500 through the base and clamp the terminal button 3 through the protrusion 414, so that the connection is more secure. Preferably, the distal end of the protrusion 414 is pressed against the proximal end surface of the circuit board 500 toward the distal side, so as to prevent the circuit board 500 from detaching from the proximal end surface of the support seat 4 toward the distal side.
在其他的一些实施例中，优选地，支撑连接环105的下部周缘可朝外凸伸形成上下间隔第二定位环111a和第一定位环111b。第二定位环111a和第一定位环111b配合套接于压筒401的内腔底部和下部。第一定位环111b和第二定位环111a之间相对形成应力隔离槽109。这样可以在底部和下部分别对压筒401进行配合定位。In some other embodiments, preferably, the lower periphery of the supporting connecting ring 105 can protrude outward to form a second positioning ring 111a and a first positioning ring 111b spaced apart from each other. The second positioning ring 111a and the first positioning ring 111b are sleeved in cooperation with each other at the bottom and the lower part of the inner cavity of the pressing cylinder 401. A stress isolation groove 109 is formed between the first positioning ring 111b and the second positioning ring 111a. In this way, the pressing cylinder 401 can be positioned in cooperation with each other at the bottom and the lower part.
在其他的一些实施例中，优选地，金属基座201的周缘与压筒401之间留有间隙。这样，可避免支撑座4接触金属基座201而导致测量结果偏差。In some other embodiments, preferably, a gap is left between the periphery of the metal base 201 and the pressing cylinder 401. In this way, it is possible to avoid the support base 4 contacting the metal base 201 and causing deviation in the measurement result.
在其他的一些实施例中，优选地，为了便于压力接头1与支撑座4之间的定位，第二定位环111a的周缘上可设置有第一纵向定位槽112，支撑座4的压筒401的内壁上可对应设置有纵向定位楞411，纵向定位楞411配合地设置于第一纵向定位槽112内。为了方便端钮3与外部设置的连接定位，端钮3的近端中心可设有定位凹部302，外壁上可设有多个第二纵向定位槽301。第二纵向定位槽301设置于周向相邻的两个电连接件6之间。In some other embodiments, preferably, in order to facilitate the positioning between the pressure connector 1 and the support seat 4, the periphery of the second positioning ring 111a may be provided with a first longitudinal positioning groove 112, and the inner wall of the pressure cylinder 401 of the support seat 4 may be correspondingly provided with a longitudinal positioning rib 411, and the longitudinal positioning rib 411 is cooperatively arranged in the first longitudinal positioning groove 112. In order to facilitate the connection and positioning of the terminal button 3 and the external device, a positioning recess 302 may be provided at the proximal center of the terminal button 3, and a plurality of second longitudinal positioning grooves 301 may be provided on the outer wall. The second longitudinal positioning groove 301 is arranged between two circumferentially adjacent electrical connectors 6.
本公开内容的范围不是由详细描述限定，而是由权利要求及其等同方案限定，并且在权利要求及其等同方案范围内的所有变型都解释为包含在本公开内容中。The scope of the disclosure is defined not by the detailed description but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are construed as being included in the disclosure.

Claims (20)

  1. 一种压力传感器，其特征在于其中，包括：A pressure sensor, characterized in that it comprises:
    压力接头(1)，其内设有纵向延伸的压力通道(100)；A pressure connector (1) having a longitudinally extending pressure channel (100) disposed therein;
    压力敏感头(2)，其纵向远端一侧朝内凹陷形成具有一朝向远端一侧的感测腔(203)的一连接筒(202)，其纵向近端一侧相应形成弹性膜片(204)，弹性膜片(204)的纵向近端一侧表面设置有压力测量电路(114)，连接筒(202)的近端与压力接头(1)密封连接以使压力通道(100)的近端连通至感测腔(203)；A pressure sensitive head (2), wherein one side of the longitudinal distal end is recessed inwardly to form a connecting tube (202) having a sensing cavity (203) facing the distal end, and one side of the longitudinal proximal end is correspondingly formed with an elastic diaphragm (204), a surface of the longitudinal proximal end of the elastic diaphragm (204) being provided with a pressure measuring circuit (114), and the proximal end of the connecting tube (202) is sealedly connected to the pressure joint (1) so that the proximal end of the pressure channel (100) is connected to the sensing cavity (203);
    与压力接头(1)一起合围形成安装腔(400)的端钮(3)和壳体(7)，壳体(7)的近端和远端一一对应地密封地连接于端钮(3)和压力接头(1)上；A terminal button (3) and a housing (7) which together with the pressure connector (1) enclose a mounting cavity (400), wherein the proximal end and the distal end of the housing (7) are sealedly connected to the terminal button (3) and the pressure connector (1) in a one-to-one correspondence;
    设置于安装腔(400)内的支撑座(4)及信号处理组件(5)，信号处理组件(5)具有卡接于支撑座(4)近端上的一电路板(500)，电路板(500)与压力测量电路(114)电连接；A support seat (4) and a signal processing component (5) are arranged in the installation cavity (400), the signal processing component (5) having a circuit board (500) clamped on the proximal end of the support seat (4), and the circuit board (500) is electrically connected to the pressure measurement circuit (114);
    及多个电连接件(6)，其穿设端钮(3)后电连接至电路板(500)。and a plurality of electrical connectors (6) which penetrate the terminal buttons (3) and are electrically connected to the circuit board (500).
  2. 根据权利要求1所述的压力传感器，其特征在于其中，壳体(7)的近端朝远端一侧依次将端钮(3)、电路板(500)及支撑座(4)压紧于压力接头(1)上。The pressure sensor according to claim 1 is characterized in that the proximal end of the housing (7) presses the terminal button (3), the circuit board (500) and the support seat (4) onto the pressure connector (1) in sequence toward the distal end.
  3. 根据权利要求1所述的压力传感器，其特征在于其中，电路板(500)通过柔性板(501)连接至压力测量电路(114)。The pressure sensor according to claim 1, characterized in that the circuit board (500) is connected to the pressure measurement circuit (114) through a flexible board (501).
  4. 根据权利要求1所述的压力传感器，其特征在于其中，支撑座(4)的近端朝外凸伸形成多组卡脚，端钮(3)的远端对应形成多个第一卡口，每组卡脚对应地卡接于所述第一卡口内。The pressure sensor according to claim 1 is characterized in that the proximal end of the support base (4) protrudes outward to form a plurality of groups of clamping pins, and the distal end of the terminal button (3) forms a plurality of first clamping ports correspondingly, and each group of clamping pins is correspondingly clamped in the first clamping ports.
  5. 根据权利要求4所述的压力传感器，其特征在于其中，每组卡脚包括在支撑座(4)的周向上邻近设置的两个卡脚，每组的两个卡脚分别通过挠性变形后朝周向抵接于对应的第一卡口的周向对应一侧的侧壁上。The pressure sensor according to claim 4 is characterized in that each group of clamping feet includes two clamping feet arranged adjacent to each other in the circumferential direction of the support seat (4), and the two clamping feet of each group are respectively flexibly deformed and abutted against the side wall of the corresponding circumferential side of the corresponding first clamping port in the circumferential direction.
  6. 根据权利要求5所述的压力传感器，其特征在于其中，电路板(500)上连接有一第二电连接部(505)，第二电连接部(505)的外端朝远端一侧电触接于金属制的壳体(7)上；其中的一组卡脚的两个卡脚之间留有供第二电连接部(505)通过的通过间隙(403)。The pressure sensor according to claim 5 is characterized in that a second electrical connection part (505) is connected to the circuit board (500), and the outer end of the second electrical connection part (505) is electrically connected to the metal shell (7) toward the distal side; and a passing gap (403) is left between two clamping pins of one set of clamping pins for the second electrical connection part (505) to pass through.
  7. 根据权利要求6所述的压力传感器，其特征在于其中，卡脚包括纵向延伸的基部及由基部(413)的近端朝远离同组卡脚的背向一侧横向突出形成的突部(414)，同组的两个卡脚的突部(414)的背向一侧抵紧于端钮(3)的对应开设的第一卡口上，同组的两个卡脚的基部(413)的背向一侧抵紧于电路板(500)上对应开设的第二卡口(307)上。The pressure sensor according to claim 6 is characterized in that the clamping foot includes a longitudinally extending base and a protrusion (414) formed by the proximal end of the base (413) protruding laterally toward the back side away from the clamping foot of the same group, and the back side of the protrusion (414) of the two clamping feet in the same group is pressed against the corresponding first clamping hole opened on the terminal button (3), and the back side of the base (413) of the two clamping feet in the same group is pressed against the corresponding second clamping hole (307) opened on the circuit board (500).
  8. 根据权利要求7所述的压力传感器，其特征在于其中，突部(414)的远端朝远端一侧抵接于电路板(500)的近端端面上。The pressure sensor according to claim 7 is characterized in that the distal end of the protrusion (414) abuts against the proximal end surface of the circuit board (500) toward the distal side.
  9. 根据权利要求1所述的压力传感器，其特征在于其中，压力接头(1)的纵向近端及其靠近近端的部分别朝外横向凸伸形成凸缘(106)及支撑连接环(105)，连接筒(202)配合套设于凸缘(106)上，且支撑并焊接于支撑连接环(105)上；凸缘(106)、支撑连接环(105)及连接筒(202)围成环腔(107)。The pressure sensor according to claim 1 is characterized in that the longitudinal proximal end of the pressure connector (1) and the portion close to the proximal end thereof respectively protrude outwardly to form a flange (106) and a supporting connecting ring (105); the connecting tube (202) is fitted on the flange (106) and is supported and welded to the supporting connecting ring (105); the flange (106), the supporting connecting ring (105) and the connecting tube (202) form an annular cavity (107).
  10. 根据权利要求1所述的压力传感器，其中，压力接头(1)的远端设有与待测容器或管道连接的连接管（101）。The pressure sensor according to claim 1, wherein a connecting pipe (101) connected to a container or a pipeline to be measured is provided at the distal end of the pressure connector (1).
  11. 根据权利要求10所述的压力传感器，其中，压力接头（1）的侧部设置有用于与所述待测容器或管道进行周向定位的定位结构。The pressure sensor according to claim 10, wherein a positioning structure for circumferential positioning with the container or pipeline to be measured is provided on the side of the pressure joint (1).
  12. 根据权利要求1所述的压力传感器，其中，压力通道（100）近端的内径逐渐扩大形成喇叭口。The pressure sensor according to claim 1, wherein the inner diameter of the proximal end of the pressure channel (100) gradually expands to form a bell mouth.
  13. 根据权利要求1所述的压力传感器，其中，压力通道（100）为自近及远孔径依次增大的阶梯孔。The pressure sensor according to claim 1, wherein the pressure channel (100) is a stepped hole whose aperture increases successively from near to far.
  14. 根据权利要求1所述的压力传感器，其中，壳体（7）包括纵向延伸且远端密封连接于压力接头（1）上的筒壳（701）以及由筒壳（701）的纵向近端朝内侧垂直收拢形成的一圈压边（702）；压边（202）朝远端一侧压紧于端钮（3）周缘形成的受压区（306）上，从而依次将端钮（3）、电路板（500）、支撑座（4）压紧于压力接头（1）上。The pressure sensor according to claim 1, wherein the housing (7) comprises a cylindrical shell (701) extending longitudinally and hermetically connected to the pressure connector (1) at the distal end, and a circle of pressing edges (702) formed by the longitudinal proximal end of the cylindrical shell (701) vertically gathered inwardly; the pressing edge (202) is pressed against a pressure zone (306) formed by the periphery of the terminal button (3) toward the distal end, thereby pressing the terminal button (3), the circuit board (500), and the support seat (4) onto the pressure connector (1) in sequence.
  15. 根据权利要求14所述的压力传感器，其中，受压区（306）处设有密封圈（8），压边（202）朝远端一侧依次将密封圈（8）、端钮（3）、电路板（500）及支撑座（4）压紧于压力接头（1）上。The pressure sensor according to claim 14, wherein a sealing ring (8) is provided at the pressure zone (306), and the pressing edge (202) presses the sealing ring (8), the terminal button (3), the circuit board (500) and the support seat (4) onto the pressure connector (1) in sequence toward the distal end.
  16. 根据权利要求1所述的压力传感器，其中，筒壳（701）的远端朝远端一侧抵接并焊接于压力接头（1）上。The pressure sensor according to claim 1, wherein the distal end of the cylindrical shell (701) abuts against and is welded to the pressure joint (1) toward the distal end side.
  17. 根据权利要求1所述的压力传感器，其中，电连接件（6）为弹性件。The pressure sensor according to claim 1, wherein the electrical connecting member (6) is an elastic member.
  18. 根据权利要求17所述的压力传感器，其中，电路板（500）的远端一侧设置有调理元件（504）；调理元件（504）的近端一侧设置有多个第一电连接部（503）；电连接件（6）远端穿设端钮（3）后抵压并电接触于第一电连接部（503）上。The pressure sensor according to claim 17, wherein a conditioning element (504) is provided on the distal side of the circuit board (500); a plurality of first electrical connection portions (503) are provided on the proximal side of the conditioning element (504); and the electrical connector (6) is inserted through the terminal button (3) at the distal end and then pressed against and electrically contacts the first electrical connection portion (503).
  19. 根据权利要求18所述的压力传感器，其中，电连接件（6）为具有两段不同盘绕外径的导电弹簧，该两段导电弹簧之间形成锥形的过渡段（601），端钮（3）上对应形成用于容纳导电弹簧的保持腔（305），保持腔（305）具有一对应的锥形的压紧部（304），压紧部（304）将过渡段（601）朝远端一侧压抵于第一电连接部（503）上。The pressure sensor according to claim 18, wherein the electrical connector (6) is a conductive spring having two sections with different coil outer diameters, a tapered transition section (601) is formed between the two sections of the conductive spring, a retaining cavity (305) for accommodating the conductive spring is correspondingly formed on the terminal button (3), the retaining cavity (305) has a corresponding tapered clamping portion (304), and the clamping portion (304) presses the transition section (601) toward the distal side against the first electrical connector (503).
  20. 根据权利要求1所述的压力传感器，其中，压力测量电路（114）包括覆盖连接于弹性膜片（204）近端表面的绝缘层及由设置于绝缘层表面的测量元件所组成的惠斯通电桥。The pressure sensor according to claim 1, wherein the pressure measurement circuit (114) comprises an insulating layer covering and connected to the proximal surface of the elastic diaphragm (204) and a Wheatstone bridge composed of measuring elements arranged on the surface of the insulating layer.
PCT/CN2023/089938 2022-12-13 2023-04-21 Pressure sensor WO2024124767A1 (en)

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