CN102128701B - Micro-differential voltage gauge based on eddy current displacement measuring technology - Google Patents

Micro-differential voltage gauge based on eddy current displacement measuring technology Download PDF

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CN102128701B
CN102128701B CN2010106022237A CN201010602223A CN102128701B CN 102128701 B CN102128701 B CN 102128701B CN 2010106022237 A CN2010106022237 A CN 2010106022237A CN 201010602223 A CN201010602223 A CN 201010602223A CN 102128701 B CN102128701 B CN 102128701B
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measuring
circuit board
eddy current
housing
diaphragm
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CN2010106022237A
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CN102128701A (en
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任克强
李岩峰
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北京塞尔瑟斯仪表科技有限公司
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Abstract

The invention discloses a micro-differential voltage gauge based on an eddy current displacement measuring technology. The micro-differential voltage gauge comprises a shell, a gauge cover arranged on the shell, a leaf spring and a measuring diaphragm which are arranged in the shell, a diaphragm arranged at the upper end of the measuring diaphragm, wherein one end of the leaf spring is connected with the measuring diaphragm through an elastic part, and the other end of the leaf spring is fixed on the shell; a measurement circuit board is arranged in the shell, is positioned at the upper end of the leaf spring, and is provided with a gauge display; a U-shaped metal plate is arranged on the measuring diaphragm, and a planar inductive circuit board which is vertical to the measurement circuit board is arranged in the center of the U-shaped metal plate; and the planar inductive circuit board is connected with the measurement circuit board through a right angle bent needle. By adopting themicro-differential voltage gauge based on the eddy current displacement measuring technology, tiny displacement is measured by adopting an eddy current principle, a planar inductor is manufactured ona printed circuit board (PCB), and accurate measurement on voltage difference can be realized in a non-contact mode by utilizing a variable-area high-frequency reflective eddy current technology.

Description

基于电涡流位移测量技术的微差压表 Differential pressure gauge based on eddy current displacement measurement technology

技术领域 FIELD

[0001] 本发明涉及一种微差压表,尤其是涉及一种基于电涡流位移测量技术的微差压表。 [0001] The present invention relates to a differential pressure gauge, particularly to an eddy current displacement measurement technique based on the differential pressure gauge.

背景技术 Background technique

[0002] 基于橡胶膜片原理的机械式微差压表被广泛应用于测量风扇和鼓风机的压力、过滤器阻力、风速、炉压、孔板差压、气泡水位及液体放大器或液压系统压力等行业,同时也用于燃烧过程中的空气煤气比值控制及自动阀控制,以及医疗保健设备中的血压和呼吸压力监测等领域。 [0002] Based on the principle of mechanical rubber diaphragm micro-differential pressure gauge is widely used to measure the pressure of fans and blowers, filter resistance, air velocity, furnace pressure, orifice differential pressure, and the liquid level of bubble amplifier or hydraulic system pressure, etc. air gas ratio control and automatic control valves, is also used in the combustion process, and healthcare equipment monitoring blood pressure and respiration art.

[0003] 现有技术中的机械式微差压表的构造多是由一个灵活移动的膜片将两个压力腔即高压腔和低压腔分割开来,以橡胶膜片和片簧作为敏感元件而进行测量,当差压(包括正压、负压)作用于膜片时,膜片产生变形,膜片的位置发生改变,由高压向低压处进行位移。 [0003] In the prior art configuration micro mechanical differential pressure gauge by a plurality of flexible diaphragm moves the two pressure chambers high pressure chamber and a low pressure chamber that is separated, and the leaf spring to the rubber diaphragm as the sensing element measurement, when the differential pressure (including positive, negative pressure) acts on the diaphragm, the diaphragm deformation generating position, the diaphragm is changed, is displaced by the high pressure to a lower pressure. 同时,膜片又与另一个机械部件相连,带动其运动,通过机械结构带动指针进行压力指 Meanwhile, yet another diaphragm member connected mechanically to drive its motion, the mechanical structure means a pressure driven pointer

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[0004] 如专利号为ZL 200810103280. 3的发明专利申请就公开了一种带温度湿度指示 [0004] Patent No. ZL 200810103280. 3 of the patent application on the invention discloses a wetness indicator strip temperature

功能的机械式差压表,包括外罩及与外罩相连接的温湿度表罩,外罩内设置高压室和低压室,高压室中部设置引入气保温层,引入气保温层下端、高压室左下侧设有高压进气孔,低压室下壁设有低压进气孔,高压室与低压室之间通过膜片隔开并在膜片上面设置膜片压盖,高压室与外罩之间通过压环连接并通过高压室密封圈密封,高压室内设置磁螺旋机构, 压力测量表头安装在磁螺旋机构上,温湿度表罩内还设有温湿度测量保温层和温湿度测量机构,温度和湿度测量表头安装在温湿度测量机构上。 Mechanical differential pressure gauge function, comprising a housing and a temperature and humidity with the cover sheet connected to the cover, is provided within the housing a high-pressure chamber and the low, the middle of the high pressure gas introduced into the chamber insulation provided, the lower end of the gas introduced into the insulation layer, the lower left side of the high-pressure chamber provided a high-pressure inlet port, a low pressure chamber wall is provided with a low pressure inlet port, separated by a diaphragm between the high pressure chamber and the low pressure chamber and a diaphragm disposed above the membrane lid, the connection between the high pressure chamber via the pressure ring and the housing ring seal and through the high pressure chamber, the high-pressure chamber a magnetic coil means, the pressure gauges mounted on the magnetic head screw mechanism, the cover sheet is also provided with temperature and humidity measuring temperature and humidity insulation temperature and humidity measuring means, the temperature and humidity meter head mounted on the temperature and humidity measuring means. 具备上述结构的机械式差压表存在测量不够精确、显示不够直观的缺陷。 Mechanical differential pressure gauge having the above construction there is a measurement is not accurate enough, not intuitive display defect.

[0005] 随着传感技术的不断发展,逐渐出现了电子式差压表,即将机械运动产生的位移量通过传感器测量出来,变成电信号进行差压测量的差压表,测量位移的传感器有很多,例如,电感式,电容式,霍尔传感器,线性可变差动变压器等,因电子式差压表在其的测量上的便利性和精确性受到愈来愈多用户的欢迎。 [0005] With the development of sensor technology, the gradual emergence of electronic differential pressure gauge, the amount of displacement is about to mechanical motion generated by the sensor measured into electrical signals measured by differential pressure gauge, measuring the displacement sensor there are many, for example, inductive, capacitive, Hall sensor, a linear variable differential transformer, an electronic differential pressure gauge because of the convenience and accuracy of its measurement on more and more by the users.

发明内容 SUMMARY

[0006] 本发明的目的就是克服现有技术中的不足,提供一种测量方便、测量精度高的基于电涡流位移测量技术的微差压表。 [0006] The object of the present invention is to overcome the disadvantages of the prior art, provides a convenient measurement, high accuracy based on the differential pressure gauge eddy current displacement measurement technology.

[0007] 为解决现有技术中的问题,本发明采用了如下的技术方案:包括壳体、设置在所述壳体上的表罩、设置在所述壳体内的片簧和测量膜片以及设置在所述测量膜片上端的膜片压盖,所述片簧的一端通过弹性部件与所述测量膜片相连接,另一端固定在所述壳体上,所述壳体内还设置有测量电路板,所述测量电路板位于所述片簧的上端,所述测量电路板上设置有仪表显示器,所述测量膜片上设置有U型金属片,所述U型金属片的中心设置有与所述测量电路板相垂直的平面电感电路板,所述平面电感电路板通过直角弯针与所述测量电路板相连接。 [0007] In order to solve the problems of the prior art, the present invention employs the following technical solution: a housing, a front cover sheet disposed on the housing, the leaf spring and measuring membrane disposed within said housing and provided at the upper end of the diaphragm measuring diaphragm gland, one end of the leaf spring by an elastic member connected to said measuring diaphragm, and the other end fixed to the housing, the inner housing is also provided with a measurement circuit board, the circuit board measured at the upper end of the leaf spring, the measuring instrument is provided with a display board, the measurement with a U-shaped metal sheet is provided on the diaphragm, the center of the U-shaped metal sheet is provided with a with the measurement plane perpendicular to the circuit board inductance circuit board, the planar inductor is connected to the circuit board through a right angle needle board with the measurement circuit.

[0008] 进一步,所述测量膜片为圆形,所述U型金属片的底部固定端和所述弹性部件均设置在所述测量膜片的圆心位置。 [0008] Further, the measuring diaphragm is a circular shape, a bottom fixed end of the U-shaped metal sheet and the elastic member are disposed at the center position of the measuring diaphragm.

[0009] 进一步,所述U型金属片与所述平面电感电路板非接触。 [0009] Further, the U-shaped metal sheet with the planar non-contact inductive circuit board.

[0010] 进一步,所述U型金属片为U型铜片。 [0010] Further, the U-shaped sheet metal U-shaped copper.

[0011] 进一步,所述测量电路板还与固定在所述壳体上的电连接器相连接。 [0011] Further, the measuring circuit board is also connected to the electrical connector is fixed on the housing.

[0012] 进一步,所述电连接器穿过所述壳体被硅胶密封在所述壳体上。 [0012] Further, the electrical connector through the housing is sealed on the housing silica gel.

[0013] 进一步,所述表罩为密封透明罩,所述密封透明罩与所述壳体的连接处设置有密封圈。 [0013] Further, the cover sheet is a transparent cover seal, the seal is connected at the transparent cover of the housing is provided with a sealing ring.

[0014] 本发明基于电涡流位移测量技术的微差压表的优点是:采用电涡流原理测量微小位移,在PCB电路板上制作了平面电感,利用变面积高频反射式电涡流技术,通过非接触的方式实现差压的精确测量。 [0014] The present invention is based on the advantages of the differential pressure gauge eddy current displacement measuring technique are: the use of eddy current principle for measuring small displacement, in the plane of the PCB board inductance produced by varying the area of ​​high frequency eddy current technique reflection, by accurate non-contact measurement of differential pressure.

附图说明 BRIEF DESCRIPTION

[0015] 图1为本发明基于电涡流位移测量技术的微差压表的平面示意图。 [0015] FIG. 1 is a schematic plan view of differential pressure gauge based on the eddy current displacement measuring technique of the present invention.

[0016] 图2为本发明基于电涡流位移测量技术的微差压表的主剖视图。 [0016] FIG. 2 a sectional view of the primary differential pressure gauge based on the eddy current displacement measuring technique of the present invention.

[0017] 图3为本发明基于电涡流位移测量技术的微差压表除去测量电路板和膜片压盖后的结构示意图。 [0017] FIG. 3 is a schematic structure after removal of the lid and the membrane circuit board based on the differential pressure gauge measuring the eddy current displacement measuring technique of the present invention.

[0018] 图4为本发明基于电涡流位移测量技术的微差压表的结构示意图。 [0018] Fig 4 a schematic structural diagram of differential pressure gauge based on eddy current displacement measurement technique of the present invention.

[0019] 附图标记说明:1-片簧,2-U型金属片,3-壳体,4-测量膜片,5-平面电感电路板, 6-测量电路板,7-膜片压盖,8-直角弯针,9-电连接器,10-表罩,11-密封圈,12-膜片弹簧,13-仪表显示器。 [0019] REFERENCE NUMERALS: 1- leaf spring, 2-U-type metal sheet, 3- housing, measuring diaphragm 4-, 5- planar inductor circuit board, the circuit board measuring 6-, 7- diaphragm gland , 8-needle bent at right angles, the electrical connector 9-, 10- table covers, seals 11-, 12 diaphragm spring, 13 a meter display.

具体实施方式 Detailed ways

[0020] 下面结合附图对本发明做进一步详细的说明。 [0020] The following drawings further detailed description of the present invention in combination.

[0021] 如图1和图2所示,本发明基于电涡流位移测量技术的微差压表,包括壳体3,壳体3上设置有表罩10,壳体3与表罩10的连接处设置有密封圈11 ;壳体3内设置有片簧1和测量膜片4,片簧1的上端设置有测量电路板6,测量电路板6上设置有仪表显示器13,测量膜片4的上端设置有膜片压盖7,膜片压盖7将测量膜片4的四周压紧在壳体3上。 10, connector housing 3 and the cover sheet 10 [0021] 1 and 2, the present invention is based on the eddy current displacement measuring technique of differential pressure gauge 2, comprises a housing 3, the housing 3 is provided with a cover sheet a sealing ring 11 is provided at; an inner housing 3 is provided with a leaf spring 1 and the measuring diaphragm 4, the upper end of the leaf spring 1 is provided with a measuring circuit board 6, the circuit board 6 is provided on the measuring instrument has a display 13, a measuring diaphragm 4 a diaphragm 7 is provided with an upper lid, the membrane lid 7 measured four weeks the membrane 4 is pressed against the housing 3.

[0022] 如图1、图2和图3所示,片簧1的一端通过膜片弹簧12与测量膜片4的中心相连接,另一端通过螺钉固定于壳体3上。 [0022] As shown in FIG. 1, 2 and 3, one end of the leaf spring 12 is connected by a diaphragm spring 4 and the center of the measuring diaphragm, and the other end is fixed to the housing by screws 3.

[0023] 如图3和图4所示,测量膜片4为圆形,U型金属片2的底部固定端设置在其圆心位置,U型金属片2的中心设置有平面电感电路板5,平面电感电路板5通过直角弯针8与测量电路板6相连接,并与测量电路板6相互垂直,在本实施例中,通过调整直角弯针8在测量电路板6上的焊接高度,使得平面电感电路板5处于U型金属片2的中心。 [0023] As shown in FIG. 3 and FIG. 4, measuring diaphragm 4 is circular, the fixed end of the bottom U-shaped metal plate 2 is provided at its center position, the center of the U-shaped metal sheet 2 is provided with a planar inductor circuit board 5, planar inductance of the circuit board 586 is connected through a right angle needle and measuring the circuit board, and the measuring circuit board 6 are vertical, in the present embodiment, by adjusting a right angle needle measurement of welding the height of the circuit board 6 8, so that flat inductor circuit board 5 at the center of the U-shaped metal sheet 2. U型金属片2在测量膜片4的带动下,可以前后位移。 U-shaped metal sheet 2 in the measurement driven diaphragm 4 can be displaced back and forth. 位移量大小取决于片簧1的刚性,在位移的过程中,平面电感电路板5与U型金属片2始终是非接触的。 The amount of displacement depends on the rigidity of the leaf spring 1, during displacement, the planar inductor sheet 5 in contact with the U-shaped metal sheet 2 is always right and wrong.

[0024] 在本实施例中,U型金属片2采用导电性能好的U型铜片。 [0024] In the present embodiment, U-shaped metal sheet 2 using copper U-shaped good conductive properties.

[0025] 如图1所示,测量电路板6通过导线连接到电连接器9上,电连接器9 一方面为微差压表提供电源,另一方面将微差压表测量的数据信息输出到外部设备。 [0025] As shown, the measuring circuit board 6 is connected to the electrical connector 9, an electrical connector 9 aspect provides a differential pressure gauge by a wire to power, on the other hand the data output of the measured differential pressure gauge to an external device.

[0026] 在本实施例中,所述电连接器9为圆形电气连接插座,圆形电气连接插座穿过了壳体3,并用硅胶密封在壳体3上。 [0026] In the present embodiment, the electrical connector 9 is electrically connected to a circular socket, the socket is electrically connected through a round housing 3, and sealed with silicone the housing 3.

[0027] 在本实施例中,所述表罩10为密封透明罩,仪表显示器13上的显示数值可以清晰的读取。 [0027] In the present embodiment, the cover sheet 10 is sealed a transparent cover, the value displayed on the meter display 13 can be clearly read.

[0028] 如图2和图4所示,测量膜片4将壳体3自然地分成了上下两个腔体,上方为高压腔,下方为低压腔,测量电路板6处于高压腔中,高压腔通过表罩10和密封圈11实现高压腔的密封,测量膜片4的中心在差压的作用下,克服片簧1对其作用力发生前后位移,在一定的差压作用下,片簧1和测量膜片4在新的位置重新达到平衡。 [0028] As shown in FIG. 2 and FIG. 4, the measuring diaphragm 4 of the housing 3 into upper and lower two natural cavities, the top of the high pressure chamber, the bottom of the low pressure chamber, the measurement circuit board 6 at a high pressure chamber, the high pressure table chamber cover 10 and sealing ring 11 of the high pressure chamber, measuring the center of the diaphragm 4 under the action of differential pressure, against its biasing force of the front and rear leaf spring 1 is displaced under the action of a certain pressure difference, by a leaf spring 4 a measuring diaphragm and in the new equilibrium position again. 然而测量膜片4的位移则带动安装在其正中心的U型金属片2产生位移,U型金属片2的位置变化使得覆盖在平面电感电路板5上的面积发生变化,从而使平面电感电路板5的电感量发生变化,测量电路板6通过检测电感量的变化,实现对差压微小变化的精确测量,并将测量数据在仪表显示器13上进行显示。 However, measuring the displacement of the diaphragm 4 is mounted to drive U-shaped metal sheet 2 in its center of displacement, a U-shaped sheet metal cover such change in position 2 in the planar area of ​​the inductor circuit board 5 is changed, so that the plane of inductance circuit inductance plate 5 is changed, the measurement circuit board 6 by detecting the change of inductance, accurate measurement of small changes in differential pressure, and measurement data is displayed on the meter display 13.

[0029] 本发明的具体实施例公布了其较佳的实施方式,但并不限于此种实施方式。 [0029] In particular embodiments of the present invention released its preferred embodiments, but are not limited to such embodiments. 本领域的普通技术人员极易根据上述实施例,领会本发明的精神,并作出不同的引申和变化。 Those of ordinary skill in the art can easily according to the above embodiments, understand the spirit of the invention and make various changes and extended. 但只要不脱离本发明的精神,都在本专利保护范围内。 However, without departing from the spirit of the invention are within the scope of this patent.

Claims (6)

1. 一种基于电涡流位移测量技术的微差压表,包括壳体、设置在所述壳体上的表罩、设置在所述壳体内的片簧和测量膜片以及设置在所述测量膜片上端的膜片压盖,所述片簧的一端通过弹性部件与所述测量膜片相连接,另一端固定在所述壳体上,其特征在于:所述壳体内还设置有测量电路板,所述测量电路板位于所述片簧的上端,所述测量电路板上设置有仪表显示器,所述测量膜片上设置有U型金属片,所述U型金属片的中心设置有与所述测量电路板相垂直的平面电感电路板,所述平面电感电路板通过直角弯针与所述测量电路板相连接,所述U型金属片与所述平面电感电路板非接触。 An eddy current displacement based on differential pressure gauge measuring technology, comprising a housing, a front cover sheet disposed on the housing is disposed within the housing and the leaf spring disposed in the measuring diaphragms measured and an upper diaphragm membrane gland, one end of the leaf spring by an elastic member connected to said measuring diaphragm, and the other end is fixed to the housing, wherein: said inner housing is also provided with a measuring circuit plate, the measuring circuit board at the upper end of the leaf spring, the measuring instrument is provided with a display board, the measurement with a U-shaped metal sheet is provided on the diaphragm, the center of the U-shaped metal sheet is provided with the measurement circuit board plane perpendicular to the inductance of the circuit board, the planar inductor is connected to the circuit board through a right angle to the measuring pin and the circuit board, the U-shaped metal sheet with the planar non-contact inductive circuit board.
2.根据权利要求1所述的基于电涡流位移测量技术的微差压表,其特征在于:所述测量膜片为圆形,所述U型金属片的底部固定端和所述弹性部件均设置在所述测量膜片的圆心位置。 The eddy current displacement based on differential pressure gauge measuring technique according to claim 1, wherein: said measuring diaphragm is circular, fixed to a bottom end of the U-shaped metal sheet and the elastic member are disposed in the center position of the measuring diaphragm.
3.根据权利要求1所述的基于电涡流位移测量技术的微差压表,其特征在于:所述U 型金属片为U型铜片。 The differential pressure gauge based on the eddy current displacement measuring technique according to claim 1, wherein: the U-shaped sheet metal U-shaped copper.
4.根据权利要求1所述的基于电涡流位移测量技术的微差压表,其特征在于:所述测量电路板还与固定在所述壳体上的电连接器相连接。 The eddy current displacement based on differential pressure gauge measuring technique according to claim 1, wherein: said measuring circuit board is also connected to the housing fixed to the electrical connector.
5.根据权利要求4所述的基于电涡流位移测量技术的微差压表,其特征在于:所述电连接器穿过所述壳体被硅胶密封在所述壳体上。 The eddy current displacement based on differential pressure gauge measuring technique according to claim 4, wherein: said electrical connector housing through the silica gel is sealed on the housing.
6.根据权利要求1所述的基于电涡流位移测量技术的微差压表,其特征在于:所述表罩为密封透明罩,所述密封透明罩与所述壳体的连接处设置有密封圈。 The eddy current displacement based on differential pressure gauge measuring technique according to claim 1, wherein: said transparent cover sheet is sealed enclosure, said sealed connection of the transparent cover and the housing is provided with a sealing ring.
CN2010106022237A 2010-12-23 2010-12-23 Micro-differential voltage gauge based on eddy current displacement measuring technology CN102128701B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004257A (en) * 2015-05-21 2015-10-28 浙江大学 Eddy current displacement sensor with display function

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CN1040682A (en) 1988-09-02 1990-03-21 株式会社日立制作所 Differntial pressure transducer
CN2295208Y (en) 1996-11-05 1998-10-21 张震 Differential pressure gauge
US6418793B1 (en) 1998-02-18 2002-07-16 A Theobald Sa Differential pressure sensor
CN1666097A (en) 2002-06-18 2005-09-07 罗斯蒙德公司 Low-cost capacitive pressure transmitter with plate coating, particle filter, self-contained
CN201909694U (en) 2010-12-23 2011-07-27 北京塞尔瑟斯仪表科技有限公司 Differential pressure gauge based on eddy current displacement measurement technology

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1040682A (en) 1988-09-02 1990-03-21 株式会社日立制作所 Differntial pressure transducer
CN2295208Y (en) 1996-11-05 1998-10-21 张震 Differential pressure gauge
US6418793B1 (en) 1998-02-18 2002-07-16 A Theobald Sa Differential pressure sensor
CN1666097A (en) 2002-06-18 2005-09-07 罗斯蒙德公司 Low-cost capacitive pressure transmitter with plate coating, particle filter, self-contained
CN201909694U (en) 2010-12-23 2011-07-27 北京塞尔瑟斯仪表科技有限公司 Differential pressure gauge based on eddy current displacement measurement technology

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004257A (en) * 2015-05-21 2015-10-28 浙江大学 Eddy current displacement sensor with display function

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