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CN209326840U - 压力传感器及压力变送器 - Google Patents

压力传感器及压力变送器 Download PDF

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Publication number
CN209326840U
CN209326840U CN201822213406.4U CN201822213406U CN209326840U CN 209326840 U CN209326840 U CN 209326840U CN 201822213406 U CN201822213406 U CN 201822213406U CN 209326840 U CN209326840 U CN 209326840U
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pressure
pressure sensor
sensitive element
modulation module
signal modulation
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因德拉·J·鲁姆巴
李春明
梁海健
赵周宇
彭栋
艾米·赫特尔
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Therm O Disc Inc
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Therm O Disc Inc
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Priority to CN201822213406.4U priority Critical patent/CN209326840U/zh
Priority to US16/518,466 priority patent/US11047753B2/en
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Publication of CN209326840U publication Critical patent/CN209326840U/zh
Priority to EP23173261.1A priority patent/EP4235133A3/en
Priority to CN201980040895.2A priority patent/CN112543864B/zh
Priority to CN202210878382.2A priority patent/CN115371856B/zh
Priority to EP19842694.2A priority patent/EP3755982B1/en
Priority to JP2021537843A priority patent/JP7114814B2/ja
Priority to PCT/US2019/067915 priority patent/WO2020139768A1/en
Priority to JP2022119415A priority patent/JP7314370B2/ja
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/0061Electrical connection means
    • G01L19/0069Electrical connection means from the sensor to its support
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/18Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/0007Fluidic connecting means
    • G01L19/0038Fluidic connecting means being part of the housing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/06Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0627Protection against aggressive medium in general
    • G01L19/0645Protection against aggressive medium in general using isolation membranes, specially adapted for protection
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/14Housings
    • G01L19/142Multiple part housings
    • G01L19/143Two part housings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/14Housings
    • G01L19/147Details about the mounting of the sensor to support or covering means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00Details 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
    • G01L19/14Housings
    • G01L19/148Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/02Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
    • G01L9/06Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

本实用新型提供了一种压力传感器及压力变送器,该压力传感器包括:压敏元件,该压敏元件为硅压阻式;信号调制模块,该信号调制模块用于将压敏元件的输出信号调制成预设格式的信号;该压敏元件和该信号调制模块集成在同一个基板上。通过实用新型提供的技术方案,使得压敏元件和信号调制模块能够整合成一个独立的压力元件,使用安装更加简单,整体体积更加小巧紧凑,提高了可靠性。

Description

压力传感器及压力变送器
技术领域
本实用新型涉及传感器领域,具体而言,涉及一种压力传感器及压力变送器。
背景技术
压力变送器是一种将压力转换成气动信号或电动信号进行控制和远传的设备。常规压力变送器,包括压敏元件及控制电路等。压敏元件设置在连接器内,通过导线与设置在压力变送器外壳内的控制电路连接。常规的压力变送器中,压敏元件及控制电路采用结构相互分离的设计方式,使得产品整体体积偏大,可靠性较差。
实用新型内容
为解决上述问题,本实用新型提供一种压力传感器及压力变送器。
本实用新型的一方面,提供一种压力传感器,包括:压敏元件,所述压敏元件为硅压阻式;信号调制模块,用于将所述压敏元件的输出信号调制成预设格式的信号;所述压敏元件和所述信号调制模块集成在同一个基板上。
优选地,所述压敏元件和所述信号调制模块通过表面贴装的方式设置在所述基板上。
优选地,所述压敏元件与所述信号调制模块通过键合方式相互连接;或者,所述压敏元件与所述信号调制模块通过所述基板上的印制电路相互连接。
优选地,所述基板包括:陶瓷基板。
优选地,所述陶瓷基板包括:氧化铝陶瓷基板或氧化锆陶瓷基板。
优选地,所述压敏元件与所述信号调制模块通过所述基板上的印制电路相互连接。
优选地,所述的压力传感器,还包括:保护罩,设置在所述基板上,用于保护所述信号调制模块,和/或所述压敏元件。
优选地,所述的压力传感器,还包括:负载,设置在所述信号调制模块和所述压敏元件的电路中。
本实用新型的另一方面,提供一种压力变送器,包括如上述的压力传感器。
优选地,所述压力传感器设置在所述压力变送器的连接器和外壳之间。
优选地,所述的压力变送器,还包括以下至少两项:第一密封胶,设置在所述连接器的空腔和所述基板的共同的边缘处;密封圈,设置在所述压力传感器与所述外壳相接触的部分;第二密封胶,设置在所述连接器与所述外壳的边沿相接触的地方。
本实用新型提供了一种压力传感器及压力变送器,该压力传感器包括:压敏元件,该压敏元件为硅压阻式;信号调制模块,该信号调制模块用于将压敏元件的输出信号调制成预设格式的信号;该压敏元件和该信号调制模块集成在同一个基板上。通过实用新型提供的技术方案,使得压敏元件和信号调制模块能够整合成一个独立的压力元件,使用安装更加简单,整体体积更加小巧紧凑,提高了可靠性。
附图说明
此处所说明的附图用来提供对本实用新型的进一步理解,构成本申请的一部分,本实用新型的示意性实施例及其说明用于解释本实用新型,并不构成对本实用新型的不当限定。在附图中:
图1是根据本实用新型的压力传感器的一个实施例的结构示意图;
图2是根据本实用新型的压力传感器的另一个实施例的结构示意图;
图3是根据本实用新型的压力变送器的一个实施例的结构示意图;
图4是根据本实用新型的压力变送器的连接器的一个实施例的结构示意图;
图5是如图4所示连接器的仰视图;
图6是根据本实用新型的压力变送器的外壳的一个实施例的结构示意图;
图7是根据本实用新型的压力变送器的一个实施例的轴向截面的结构示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本实用新型。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
本实用新型提供了一种压力传感器,图1是根据本实用新型的压力传感器的一个实施例的结构示意图。一种压力传感器,如图1所示,包括:压敏元件110,该压敏元件为硅压阻式;信号调制模块120,用于将压敏元件110的输出信号调制成预设格式的信号;压敏元件110和信号调制模块120集成在同一个基板100上。通过本实用新型的技术方案,采用硅压阻式的压敏元件,使用集成的方式,将压敏元件和信号调制模块整合成一个独立的压力元件,使得该压力元件,使用安装更加简单,整体体积更加小巧紧凑,提高了可靠性。
作为一个较优的实施方式,压敏元件110可以采用相关技术中的多种感压元件,例如微机电系统(Micro-Electro-Mechanical Systems,简称为MEMS),信号调制模块120可以采用相关技术中用于信号调制的芯片,例如专用集成电路(Application SpecificIntegrated Circuit,简称为ASIC)。
作为一个较优的实施方式,压敏元件110和信号调制模块120可以通过表面贴装的方式设置在基板100上。在该实施方式下,将压敏元件和信号调制模块通过表面贴装的方式设置在基板上,不需要导线连接,减小了压力传感器的体积,整体更为小巧紧凑。
作为另一个较优的实施方式,压敏元件110与信号调制模块120可以通过键合方式相互连接;或者,压敏元件110与信号调制模块120可以通过基板上的印制电路相互连接。在该实施方式下,压敏元件与信号调制模块通过键合方式,或,通过基板上的印制电路相互电连接,使得压敏元件与信号调制模块之间的连接省去了导线的连接,并且生产加工方便,实施性强。
作为另一个较优的实施方式,基板100可以包括陶瓷基板。通过该实施方式,使用陶瓷基板,相比较于常规设计中的玻璃纤维基板,机械强度更好,绝缘性能更好,材料性质更稳定,抗腐蚀能力更强;并且,在该压力传感器的使用过程中,需要与工作介质直接接触时,特别是与液体工作介质直接接触时,适应范围更广;同时,相对于常规方案应用于压力变送器中时,该实施方式下,不需要将陶瓷基板与工作介质做物理隔离,简化了设计及工艺。
优选地,陶瓷基板可以包括氧化铝陶瓷基板或氧化锆陶瓷基板。通过该实施方式,在使用时,提高了该压力传感器的基板的传导性、机械强度和耐高温性。
作为另一个较优的实施方式,上述的压力传感器,如图2所示,还可以包括保护罩230,保护罩230设置在基板上,用于保护信号调制模块,和/或压敏元件(即就是,用于保护以下至少之一的元件:信号调制模块;压敏元件)。在该实施方式下,设置在基板上的保护罩230,罩住信号调制模块,和/或压敏元件,使得在该压力传感器在使用过程中,保护罩内的元器件不易被碰撞到,使用更为安全,可靠性更高。
作为另一个较优的实施方式,上述的压力传感器,还包括:负载140,设置信号调制模块120和压敏元件110的电路中(该负载140包括:被动元器件,如:电阻和电容等,被动元器件均设置在基板上,并与信号调制模块及压敏元件电连接)。通过该实施方式,使得信号调制模块及压敏元件能够得到电流保护,安全性更高。
本实用新型还提供了一种压力变送器,图3是根据本实用新型的压力变送器的一个实施例的结构示意图。一种压力变送器300,包括如上述的压力传感器。通过该技术方案,采用如上述的压力传感器,压力变送器300中不需要像常规设计中那样设计(在常规设计中,分别在连接器350中和外壳360中设置压敏元件及控制电路,并通过导线等方式将其连接并安装起来),简化了设计;通过该技术方案,简化了生产安装工艺,也使得压力变送器整体的体积更加小巧紧凑,使用更为便利,集成化的设置也提高了产品的可靠性。
图4是根据本实用新型的压力变送器的连接器的一个实施例的结构示意图;图5是如图4所示连接器的仰视图;图6是根据本实用新型的压力变送器的外壳的一个实施例的结构示意图;图7是根据本实用新型的压力变送器的一个实施例的轴向截面的结构示意图。作为一个较优的实施方式,压力传感器400可以设置在压力变送器的连接器450和外壳460之间。如图4、图5、图6、图7所示,压力传感器400可以设置在连接器450的空腔455内部。第一密封胶457可以设置在压力传感器400的底部,并且围绕着基板(如图1中所示的基板100)的边缘处设置,基板上设置有压力传感器400,压力传感器400容纳在连接器450的空腔455内(也就是说,第一密封胶457设置在连接器的空腔455和基板100的共同的边缘处,将压力传感器400与连接器450整合在一起)。压力传感器400的底部(如图4、图5所示)可以被容纳并密封在连接器450的空腔455内部。图5示出了压力传感器400容纳在连接器450内部时连接器的底部的结构示意图。在该实施方式中,压力传感器整体包封在连接器内部,使得压力变送器的结构更为简单、紧凑,压力变送器的性能更为可靠。
作为另一个较优的实施方式,上述压力变送器,还可以包括:密封圈470,密封圈470可以设置在压力传感器400与外壳460相接触的部分(例如:密封圈470可以设置在外壳460的容纳腔465内,并与压力传感器相接触);和/或,第二密封胶480,第二密封胶480可以设置在连接器与外壳的边沿462相接触的地方。在该实施方式中,通过外壳的容纳腔内的密封圈与压力传感器的底部压合密封,将压力传感器整体包封在外壳内部,使得压力变送器的密封性能更高,在一定程度上提高了产品的可靠性。
以上实施方式仅示出了部分优选的实施方式,需要说明的是,本领域技术人员可以根据实际的需要,选择以下的至少两项:第一密封胶,设置在连接器的空腔和基板的共同的边缘处;密封圈,设置在压力传感器与外壳相接触的部分;第二密封胶,设置在连接器与外壳的边沿相接触的地方。
结合附图1至图7对装配过程进行详细说明。作为一个较优的实施方式,在装配过程中,首先,压力传感器400被设置在连接器450的空腔455内,使得基板100的边缘紧密适配在空腔455的边缘内。然后,将端子(或引线)406连接(例如,通过焊接)到压力传感器400的基板100上的触点105上。之后,第一密封胶457设置在压力传感器400的基板100和空腔455共同的边缘处,将压力传感器400与连接器450整合(集成)在一起,提供了压力传感器与周围环境之间的第一密封。然后,密封圈470可以设置在外壳460的容纳腔465内。连接器450(具有集成的压力传感器400)被设置在外壳460的容纳腔465内,使得压力传感器压紧(压紧并紧靠)密封圈470,同时外壳460的边沿462压接在连接器450上(如图7所示),从而将连接器450安装到外壳460上,并将压力传感器400整体包封在外壳460的容纳腔465内。用这种方式,提供了压力传感器400与周围环境之间的第二密封。最后,第二密封胶480设置在外壳460的边沿处连接连接器450(例如,在外壳460在连接器450上的压接处)。第二密封胶480提供了压力传感器与周围环境之间的第三密封。
通过上述实施例,提供了一种压力传感器及压力变送器。通过该技术方案,达到了如下技术效果:将压敏元件和信号调制模块整合成一个独立的压力元件,使得该压力元件,使用安装更加简单,整体体积更加小巧紧凑,提高了产品可靠性;并且,集成为一个独立压力元件,压力元件内部的零件位置也相对固定,避免了使用柔性印制电路板和绝缘线材等位置不固定的零件;同时,相对于常规方案应用于压力变送器中时,该实施方式下,不需要将压力传感器与工作介质做物理隔离,简化了设计及工艺。
需要说明的是,这些技术效果并不是上述所有的实施方式所具有的,有些技术效果是某些优选实施方式才能取得的。
以上所述仅为本实用新型的较佳实施例而已,并非用于限定本实用新型的保护范围。凡在本实用新型的精神和原则之内所作的任何修改、等同替换、改进等,均包含在本实用新型的保护范围内。

Claims (10)

1.一种压力传感器,其特征在于,包括:
压敏元件,所述压敏元件为硅压阻式;
信号调制模块,用于将所述压敏元件的输出信号调制成预设格式的信号;
所述压敏元件和所述信号调制模块集成在同一个基板上。
2.根据权利要求1所述的压力传感器,其特征在于,所述压敏元件和所述信号调制模块通过表面贴装的方式设置在所述基板上。
3.根据权利要求2所述的压力传感器,其特征在于,
所述压敏元件与所述信号调制模块通过键合方式相互连接;或者,
所述压敏元件与所述信号调制模块通过所述基板上的印制电路相互连接。
4.根据权利要求3所述的压力传感器,其特征在于,
所述基板包括:陶瓷基板。
5.根据权利要求4所述的压力传感器,其特征在于,
所述陶瓷基板包括:氧化铝陶瓷基板或氧化锆陶瓷基板。
6.根据权利要求1至5中任一项所述的压力传感器,其特征在于,还包括:
保护罩,设置在所述基板上,用于保护所述信号调制模块,和/或所述压敏元件。
7.根据权利要求1至5中任一项所述的压力传感器,其特征在于,还包括:
负载,设置在所述信号调制模块和所述压敏元件的电路中。
8.一种压力变送器,其特征在于,包括根据权利要求1至7中任一项所述的压力传感器。
9.根据权利要求8所述的压力变送器,其特征在于,所述压力传感器设置在所述压力变送器的连接器和外壳之间。
10.根据权利要求9所述的压力变送器,其特征在于,还包括以下至少两项:
第一密封胶,设置在所述连接器的空腔和所述基板的共同的边缘处;
密封圈,设置在所述压力传感器与所述外壳相接触的部分;
第二密封胶,设置在所述连接器与所述外壳的边沿相接触的地方。
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CN115371856A (zh) 2022-11-22
CN112543864B (zh) 2022-08-16
EP4235133A3 (en) 2023-12-27
JP2022169528A (ja) 2022-11-09
US20200209091A1 (en) 2020-07-02
EP4235133A2 (en) 2023-08-30
EP3755982B1 (en) 2024-01-31
EP3755982A1 (en) 2020-12-30
CN115371856B (zh) 2024-06-28
US11047753B2 (en) 2021-06-29
JP2022516096A (ja) 2022-02-24
JP7114814B2 (ja) 2022-08-08

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