CN105387966A - Double-sensing-element wall surface pressure sensor - Google Patents
Double-sensing-element wall surface pressure sensor Download PDFInfo
- Publication number
- CN105387966A CN105387966A CN201510671570.8A CN201510671570A CN105387966A CN 105387966 A CN105387966 A CN 105387966A CN 201510671570 A CN201510671570 A CN 201510671570A CN 105387966 A CN105387966 A CN 105387966A
- Authority
- CN
- China
- Prior art keywords
- core rod
- insulating sleeve
- peripheral surface
- housing
- piezoelectric element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 54
- 230000009977 dual effect Effects 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 229910000906 Bronze Inorganic materials 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 239000010974 bronze Substances 0.000 claims description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 18
- 238000004880 explosion Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/14—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
本发明公开了一种双敏感元件壁面压力传感器，属于爆炸冲击波超压场测量技术领域；该传感器包括：芯电极、弹性元件、支撑芯杆、壳体、芯杆、输出壳体、两个压电元件、三个支撑套和导线；壳体的外圆周面与输出壳体的内圆周面连接，绝缘套Ⅲ固定在输出壳体的内圆周面；支撑芯杆套装在壳体的内圆周面上；绝缘套Ⅱ套装在支撑芯杆的盲孔中，芯杆与绝缘套Ⅱ及绝缘套Ⅲ孔轴配合安装；绝缘套Ⅰ套装在支撑芯杆外圆周面的环形间隙中，压电元件Ⅰ、芯电极、压电元件Ⅱ及垫片依次套装在绝缘套Ⅰ的内圆周面；弹性元件固定在壳体的外圆周面上；导线的一端固定在芯电极上，另一端固定在芯杆上；本发明用于测量壁面冲击波的压力或掠过地表面冲击波的压力。
The invention discloses a wall surface pressure sensor with dual sensitive elements, which belongs to the technical field of explosion shock wave overpressure field measurement; the sensor includes: a core electrode, an elastic element, a supporting core rod, a shell, a core rod, an output shell, Electrical components, three supporting sleeves and wires; the outer peripheral surface of the housing is connected to the inner peripheral surface of the output housing, and the insulating sleeve III is fixed on the inner peripheral surface of the output housing; the supporting core rod is set on the inner peripheral surface of the housing Above; the insulating sleeve II is set in the blind hole of the supporting core rod, and the core rod is installed with the hole shaft of the insulating sleeve II and the insulating sleeve III; the insulating sleeve I is set in the annular gap on the outer peripheral surface of the supporting core rod, and the piezoelectric element I , core electrode, piezoelectric element II and gasket are set on the inner peripheral surface of the insulating sleeve I in turn; the elastic element is fixed on the outer peripheral surface of the shell; one end of the wire is fixed on the core electrode, and the other end is fixed on the core rod ; The present invention is used to measure the pressure of the wall shock wave or the pressure of the shock wave passing the ground surface.
Description
技术领域technical field
本发明属于爆炸冲击波超压场测量技术领域，具体涉及一种双敏感元件壁面压力传感器。The invention belongs to the technical field of explosion shock wave overpressure field measurement, and in particular relates to a wall surface pressure sensor with dual sensitive elements.
背景技术Background technique
在空中爆炸或水中爆炸冲击波超压场中测量作用在构件表面的冲击波超压或测量冲击波掠过地面反射后形成的地面超压时，必须测量冲击波压力场壁面压力；目前测量冲击波压力场壁面压力的方法主要有压力罐法和壁面压力传感器电测法，压力罐法应用测量反复注入液体水的体积来推测膜片变形量，进而估算冲击波超压结果，测量难以精确可靠，更难以完成快速实时准确测量。国内生产的壁面压力传感器以压电陶瓷为压电晶体为主，压电陶瓷压电性强、介电常数高、可以加工成任意形状，但机械品质因子较低、电损耗较大、稳定性差，适合于大功率换能器和宽带滤波器等应用，但对高频、高稳定应用不理想。石英晶体的压电单晶压电性弱，介电常数很低，受切型限制存在尺寸局限，但稳定性很高，机械品质因子高。测量冲击波超压的石英晶体压电压力传感器主要源于国外进口，价格昂贵。When measuring the shock wave overpressure acting on the surface of the component in the air explosion or water explosion shock wave overpressure field or measuring the ground overpressure formed by the shock wave grazing the ground, the wall pressure of the shock wave pressure field must be measured; currently, the wall pressure of the shock wave pressure field is measured The methods mainly include the pressure tank method and the electrical measurement method of the wall pressure sensor. The pressure tank method is used to measure the volume of repeatedly injected liquid water to estimate the deformation of the diaphragm, and then estimate the result of the shock wave overpressure. The measurement is difficult to be accurate and reliable, and it is even more difficult to complete fast real-time Measure accurately. Domestically produced wall pressure sensors mainly use piezoelectric ceramics as piezoelectric crystals. Piezoelectric ceramics have strong piezoelectricity, high dielectric constant, and can be processed into arbitrary shapes, but have low mechanical quality factors, large electrical losses, and poor stability. , suitable for applications such as high-power transducers and broadband filters, but not ideal for high-frequency, high-stability applications. The piezoelectric single crystal of quartz crystal has weak piezoelectricity, low dielectric constant, and size limitation due to cutting type, but it has high stability and high mechanical quality factor. Quartz crystal piezoelectric pressure sensors for measuring shock wave overpressure are mainly imported from abroad and are expensive.
在野外爆炸试验中，要求壁面压力传感器必须具有以下一些性能：In the field explosion test, the wall pressure sensor must have the following properties:
(1)足够宽的量程，如上限量程为200MPa，下限量为0.5MPa；(1) Wide enough range, such as the upper limit is 200MPa, the lower limit is 0.5MPa;
(2)足够高的灵敏度，如40pc/MPa～200pc/MPa；(2) High enough sensitivity, such as 40pc/MPa～200pc/MPa;
(3)灵敏度非线性，如≤1％(3) Sensitivity non-linearity, such as ≤1%
(4)足够低的温度漂移，如0.01pc/oC～0.001pc/oC；(4) Low enough temperature drift, such as 0.01pc/oC～0.001pc/oC;
(5)工作温度，如-20℃～60℃(5) Working temperature, such as -20℃～60℃
(6)具有对水密封的性能。(6) It has the performance of being watertight.
发明内容Contents of the invention
有鉴于此，本发明的目的是提供一种双敏感元件壁面压力传感器，用于测量壁面冲击波的压力或掠过地表面冲击波的压力。In view of this, the object of the present invention is to provide a wall pressure sensor with dual sensitive elements, which is used to measure the pressure of the wall shock wave or the pressure of the shock wave passing the ground surface.
本发明是通过下述技术方案实现的：The present invention is achieved through the following technical solutions:
一种双敏感元件壁面压力传感器，包括：垫片、芯电极、弹性元件、绝缘套Ⅰ、支撑芯杆、壳体、绝缘套Ⅱ、芯杆、输出壳体、绝缘套Ⅲ、压电元件Ⅰ、压电元件Ⅱ和导线；A wall pressure sensor with dual sensitive elements, including: gasket, core electrode, elastic element, insulating sleeve I, supporting core rod, shell, insulating sleeve II, core rod, output housing, insulating sleeve III, piezoelectric element I , Piezoelectric element II and wires;
所述弹性元件为一端开放的圆柱形壳体，The elastic element is a cylindrical shell with one end open,
所述支撑芯杆为阶梯型圆柱，在支撑芯杆大直径段的端面开有圆形盲孔；The supporting core rod is a stepped cylinder, and a circular blind hole is opened on the end face of the large-diameter section of the supporting core rod;
所述壳体为带轴向通孔的圆柱；The housing is a cylinder with an axial through hole;
所述绝缘套Ⅱ为一端开放一端封闭的圆柱套；The insulating sleeve II is a cylindrical sleeve with one end open and one end closed;
所述芯杆为阶梯型圆柱；The core rod is a stepped cylinder;
所述输出壳体为带轴向通孔的阶梯型圆柱，圆柱的内圆周面设有台阶面；The output housing is a stepped cylinder with an axial through hole, and the inner peripheral surface of the cylinder is provided with a stepped surface;
其连接关系如下：壳体的外圆周面与输出壳体大直径段的内圆周面连接，绝缘套Ⅲ固定在输出壳体小直径段的内圆周面；支撑芯杆套装在壳体的内圆周面上，支撑芯杆的小直径段位于远离输出壳体的一端；绝缘套Ⅱ套装在支撑芯杆的盲孔中，芯杆的大直径段与绝缘套Ⅱ的内圆周面孔轴配合安装，芯杆的小直径段与绝缘套Ⅲ的内圆周面孔轴配合安装，支撑芯杆的端面、绝缘套Ⅱ的端面及芯杆的台阶面均抵触在输出壳体的台阶面及绝缘套Ⅲ的端面形成的环形台阶面上；The connection relationship is as follows: the outer peripheral surface of the housing is connected to the inner peripheral surface of the large-diameter section of the output housing, and the insulating sleeve III is fixed on the inner peripheral surface of the small-diameter section of the output housing; the supporting core rod is set on the inner circumference of the housing On the surface, the small-diameter section of the supporting core rod is located at the end away from the output housing; the insulating sleeve II is set in the blind hole of the supporting core rod, and the large-diameter section of the core rod is installed in cooperation with the inner peripheral surface of the insulating sleeve II. The small diameter section of the rod is installed axially with the inner peripheral surface of the insulating sleeve III, and the end face of the supporting core rod, the end face of the insulating sleeve II and the stepped surface of the core rod are all in contact with the stepped surface of the output shell and the end face of the insulating sleeve III. on the circular step surface;
绝缘套Ⅰ套装在支撑芯杆小直径段外圆周面和壳体的内圆周面形成的环形间隙中，压电元件Ⅰ、芯电极、压电元件Ⅱ及垫片依次套装在绝缘套Ⅰ的内圆周面，其中，压电元件Ⅰ的端面抵触支撑芯杆小直径段的端面；弹性元件固定在壳体的外圆周面上，且垫片的端面抵触在弹性元件封闭端的内表面，绝缘套Ⅰ的端面与弹性元件封闭端的内表面之间留有间隙；导线的一端通过焊接固定在芯电极上，另一端通过焊接固定在芯杆上。The insulating sleeve I is set in the annular gap formed by the outer peripheral surface of the small-diameter section of the supporting core rod and the inner peripheral surface of the shell, and the piezoelectric element I, the core electrode, the piezoelectric element II and the gasket are sequentially sleeved in the insulating sleeve I. Circumferential surface, in which, the end surface of the piezoelectric element I touches the end surface of the small-diameter section of the supporting core rod; the elastic element is fixed on the outer circumferential surface of the housing, and the end surface of the gasket touches the inner surface of the closed end of the elastic element, and the insulating sleeve I There is a gap between the end face of the elastic element and the inner surface of the closed end of the elastic element; one end of the wire is fixed on the core electrode by welding, and the other end is fixed on the core rod by welding.
进一步的，所述垫片、芯电极、压电元件Ⅰ及压电元件Ⅱ均为圆板；所述压电元件Ⅰ和压电元件Ⅱ为敏感元件。Further, the gasket, the core electrode, the piezoelectric element I and the piezoelectric element II are all circular plates; the piezoelectric element I and the piezoelectric element II are sensitive elements.
进一步的，所述弹性元件的内圆周面加工有内螺纹；所述壳体的两端均设有外螺纹；所述输出壳体的小直径段加工有外螺纹，圆柱的大直径段加工有内螺纹；壳体的两端分别与输出壳体及弹性元件的连接方式为螺纹连接。Further, the inner circumferential surface of the elastic element is processed with internal threads; both ends of the housing are provided with external threads; the small diameter section of the output housing is processed with external threads, and the large diameter section of the cylinder is processed with Internal thread; the two ends of the housing are respectively connected to the output housing and the elastic element by threaded connection.
进一步的，所述绝缘套Ⅲ的外圆周面设有台阶面；绝缘套Ⅲ的台阶面抵触在输出壳体内圆周面的台阶面上。Further, the outer circumferential surface of the insulating sleeve III is provided with a stepped surface; the stepped surface of the insulating sleeve III interferes with the stepped surface of the inner circumferential surface of the output housing.
进一步的，还包括：密封垫圈，密封垫圈套装在壳体外圆周面，且密封垫圈的端面抵触输出壳体大直径段的端面。Further, it also includes: a sealing gasket, the sealing gasket is sleeved on the outer peripheral surface of the casing, and the end surface of the sealing gasket is in contact with the end surface of the large-diameter section of the output casing.
进一步的，芯杆的小直径段开有沿其轴向的圆形盲孔及矩形盲孔，其中圆形盲孔的开孔长度大于矩形盲孔的开孔长度，矩形盲孔的两侧贯穿芯杆的外圆周面，在芯杆大直径段的外圆周面开有径向通孔。Further, the small-diameter section of the core rod is provided with a circular blind hole and a rectangular blind hole along its axial direction, wherein the opening length of the circular blind hole is greater than the opening length of the rectangular blind hole, and the two sides of the rectangular blind hole penetrate The outer peripheral surface of the core rod is provided with a radial through hole on the outer peripheral surface of the large diameter section of the core rod.
进一步的，所述垫片、芯电极、弹性元件、芯杆的材料均采用磷青铜；绝缘套Ⅰ、绝缘套Ⅱ、绝缘套Ⅲ的材料均采用聚四氟乙烯；支撑芯杆、壳体、输出壳体的材料均采用不锈钢；压电元件Ⅰ和压电元件Ⅱ的材料均采用石英；导线为耐高温导线。Further, the materials of the gaskets, core electrodes, elastic elements, and core rods are all made of phosphor bronze; the materials of insulating sleeve I, insulating sleeve II, and insulating sleeve III are all made of polytetrafluoroethylene; supporting core rods, shells, The material of the output shell is made of stainless steel; the material of the piezoelectric element I and the piezoelectric element II is made of quartz; the wire is a high temperature resistant wire.
其安装工艺流程为：(1)将壳体的外圆周面通过螺纹安装在输出壳体大直径段的内圆周面，但并不将壳体与输出壳体锁紧；The installation process is as follows: (1) Install the outer peripheral surface of the casing on the inner peripheral surface of the large diameter section of the output casing through threads, but do not lock the casing and the output casing;
(2)将导线的一端焊接在芯电极的焊点上；(2) Weld one end of the wire to the solder joint of the core electrode;
(3)将绝缘套Ⅰ套装在支撑芯杆小直径段的外圆周面，将压电元件Ⅰ、带导线的芯电极、压电元件Ⅱ及垫片依次套装在绝缘套Ⅰ的内圆周面；(3) Put the insulating sleeve I on the outer circumferential surface of the small-diameter section of the supporting core rod, and set the piezoelectric element I, the core electrode with wires, the piezoelectric element II and the gasket on the inner circumferential surface of the insulating sleeve I in sequence;
(4)将绝缘套Ⅱ、芯杆依次安装在支撑芯杆的大直径段的盲孔中；(4) Install the insulating sleeve II and the core rod in the blind hole of the large diameter section supporting the core rod in sequence;
(5)将导线的另一端焊接在所述焊孔中；(5) welding the other end of the wire in the welding hole;
(6)将绝缘套Ⅲ套装在输出壳体小直径段的内圆周面；(6) Set the insulating sleeve III on the inner peripheral surface of the small diameter section of the output housing;
(7)将带绝缘套Ⅰ、压电元件Ⅰ、导线、芯电极、压电元件Ⅱ、垫片、绝缘套Ⅱ及芯杆的支撑芯杆套装在壳体内圆周面，并将芯杆的小直径段套装在绝缘套Ⅲ中；(7) Set the supporting core rod with insulating sleeve I, piezoelectric element I, wire, core electrode, piezoelectric element II, gasket, insulating sleeve II and core rod on the inner circumferential surface of the shell, and place the small core rod The diameter section is set in the insulating sleeve III;
将件不锈钢支撑芯杆装配在件不锈钢内并与件L不锈钢输出接口合在一起，再紧固件磷青铜和件不锈钢壳体，Assemble the first stainless steel support core rod in the first stainless steel and combine it with the first L stainless steel output interface, and then fasten the first phosphor bronze and the first stainless steel shell,
(8)将弹性元件固定在壳体的外圆周面；(8) fixing the elastic element on the outer circumferential surface of the housing;
(9)将壳体与接口壳体锁紧。(9) Lock the shell and the interface shell.
工作原理：将本发明的传感器安装在被测构件或与测点附近的地面上，且使弹性元件封闭端的外表面与被测构件的上表面平齐，或与测点附近的地表平齐，芯杆的盲孔与低噪声电缆的插头连接；Working principle: install the sensor of the present invention on the measured component or the ground near the measuring point, and make the outer surface of the closed end of the elastic element flush with the upper surface of the measured component, or flush with the ground near the measuring point, The blind hole of the core rod is connected with the plug of the low-noise cable;
当进行野外爆炸试验时，被测构件表面的受到爆炸的冲击波压力或冲击波掠过地面反射后的压力同时作用在与被测构件或地表平齐的传感器的弹性元件上，弹性元件将受到的压力通过垫片传递给芯电极两端的压电元件Ⅰ及压电元件Ⅱ，由于支撑芯杆固定不动，因此，压电元件Ⅰ及压电元件Ⅱ的一端均受到垫片的向靠近芯杆的作用力，压电元件Ⅰ及压电元件Ⅱ的另一端均受到支撑芯杆的向靠近垫片的支撑作用力，压电元件Ⅰ及压电元件Ⅱ受挤压将压力转换为电信号，通过芯电极传递给芯杆，芯杆将电信号传递出去。When the field explosion test is carried out, the shock wave pressure on the surface of the component under test or the pressure reflected by the shock wave passing the ground acts on the elastic element of the sensor flush with the component under test or the ground at the same time, and the elastic element will be under pressure The piezoelectric element I and the piezoelectric element II at both ends of the core electrode are transmitted through the gasket. Since the supporting core rod is fixed, one end of the piezoelectric element I and the piezoelectric element II is subjected to the pressure of the gasket toward the core rod. Force, the other ends of the piezoelectric element I and the piezoelectric element II are supported by the supporting force of the supporting core rod towards the gasket, the piezoelectric element I and the piezoelectric element II are squeezed to convert the pressure into an electrical signal, through The core electrode is passed to the core rod, and the core rod transmits the electrical signal.
有益效果：(1)本发明的弹性元件将受到的压力传递给两个压电元件，通过两个压电元件受挤压将压力转换为电信号使得传感器具有足够宽的量程、足够高的灵敏度、足够低的温度漂移性能、足够宽的工作温度范围和对水密封性能。Beneficial effects: (1) The elastic element of the present invention transmits the received pressure to two piezoelectric elements, and the pressure is converted into an electrical signal through the extrusion of the two piezoelectric elements so that the sensor has a sufficiently wide range and a sufficiently high sensitivity , Sufficiently low temperature drift performance, sufficiently wide operating temperature range and watertight performance.
(2)本发明由垫片、芯电极和两个压电元件组成的压电测试结构可实现高于单个压电元件50％电荷量采集，有利于测试远场小信号的冲击波超压。(2) The piezoelectric test structure of the present invention consisting of a gasket, a core electrode and two piezoelectric elements can realize charge collection 50% higher than that of a single piezoelectric element, which is beneficial for testing shock wave overpressure of small far-field signals.
附图说明Description of drawings
图1为本发明的组成结构图。Fig. 1 is a structural diagram of the present invention.
图2为本发明的绝缘套Ⅰ的结构图。Fig. 2 is a structural diagram of the insulating sleeve I of the present invention.
图3～5为本发明的支撑芯杆的结构图。3-5 are structural diagrams of the supporting core rod of the present invention.
图6为本发明的绝缘套Ⅱ的结构图。Fig. 6 is a structural diagram of the insulating sleeve II of the present invention.
图7为本发明的芯杆的结构图。Fig. 7 is a structural diagram of the core rod of the present invention.
其中，1-垫片，2-芯电极，3-弹性元件，4-绝缘套Ⅰ，5-支撑芯杆，6-密封垫圈，7-壳体，8-绝缘套Ⅱ，9-芯杆，10-输出壳体，11-绝缘套Ⅲ，12-压电元件Ⅰ，13-压电元件Ⅱ，14-导线。Among them, 1-gasket, 2-core electrode, 3-elastic element, 4-insulating sleeve Ⅰ, 5-supporting core rod, 6-sealing gasket, 7-shell, 8-insulating sleeve Ⅱ, 9-core rod, 10—output shell, 11—insulation sleeve III, 12—piezoelectric element I, 13—piezoelectric element II, 14—lead wire.
具体实施方式detailed description
下面结合附图并举实施例，对本发明进行详细描述。The present invention will be described in detail below with reference to the accompanying drawings and examples.
本发明提供了一种双敏感元件壁面压力传感器，参见附图1，包括：垫片1、芯电极2、弹性元件3、绝缘套Ⅰ4、支撑芯杆5、密封垫圈6、壳体7、绝缘套Ⅱ8、芯杆9、输出壳体10、绝缘套Ⅲ11、压电元件Ⅰ12、压电元件Ⅱ13和导线14；The present invention provides a wall pressure sensor with dual sensitive elements, referring to accompanying drawing 1, comprising: gasket 1, core electrode 2, elastic element 3, insulating sleeve I4, supporting core rod 5, sealing washer 6, housing 7, insulating Sleeve II8, core rod 9, output housing 10, insulating sleeve III11, piezoelectric element I12, piezoelectric element II13 and wire 14;
所述垫片1、芯电极2、压电元件Ⅰ12及压电元件Ⅱ13均为圆板；所述压电元件Ⅰ12和压电元件Ⅱ13为敏感元件；芯电极2的外圆周面上设有凸台，所述凸台为焊点；The gasket 1, the core electrode 2, the piezoelectric element I12 and the piezoelectric element II13 are all circular plates; the piezoelectric element I12 and the piezoelectric element II13 are sensitive elements; platform, the boss is a solder joint;
所述弹性元件3为一端开放的圆柱形壳体，弹性元件3的内圆周面加工有内螺纹；The elastic element 3 is a cylindrical shell with one end open, and the inner peripheral surface of the elastic element 3 is processed with internal threads;
参见附图2，所述绝缘套Ⅰ4为两端开放且侧面不封闭的圆柱套；Referring to accompanying drawing 2, the insulating sleeve I4 is a cylindrical sleeve with open ends and unclosed sides;
参见附图3～5，所述支撑芯杆5为阶梯型圆柱，在支撑芯杆5大直径段的端面开有圆形盲孔，在支撑芯杆5大直径段的外圆周面开有径向通孔及与径向通孔相通的凹槽，所述凹槽的长度方向与支撑芯杆5的轴向一致；Referring to accompanying drawings 3 to 5, the support core rod 5 is a stepped cylinder, a circular blind hole is opened on the end face of the support core rod 5 large-diameter section, and a diameter is opened on the outer circumferential surface of the support core rod 5 large-diameter section. A groove communicating with the through hole and the radial through hole, the length direction of the groove is consistent with the axial direction of the support core rod 5;
所述壳体7为带轴向通孔的圆柱，圆柱的两端均设有外螺纹；The housing 7 is a cylinder with an axial through hole, and both ends of the cylinder are provided with external threads;
参见附图6，所述绝缘套Ⅱ8为一端开放一端封闭的圆柱套，在圆柱套的外圆周面开有径向通孔；Referring to accompanying drawing 6, the insulating sleeve II8 is a cylindrical sleeve with one end open and one end closed, and a radial through hole is opened on the outer circumference of the cylindrical sleeve;
参见附图7，所述芯杆9为阶梯型圆柱，芯杆9的小直径段开有沿其轴向的圆形盲孔及矩形盲孔，其中圆形盲孔的开孔长度大于矩形盲孔的开孔长度，矩形盲孔的两侧贯穿芯杆9的外圆周面，在芯杆9大直径段的外圆周面开有径向通孔；Referring to accompanying drawing 7, described core rod 9 is stepped cylinder, and the small-diameter section of core rod 9 has circular blind hole and rectangular blind hole along its axial direction, wherein the opening length of circular blind hole is longer than rectangular blind hole. The opening length of the hole, the two sides of the rectangular blind hole run through the outer peripheral surface of the core rod 9, and a radial through hole is opened on the outer peripheral surface of the large diameter section of the core rod 9;
所述输出壳体10为带轴向通孔的阶梯型圆柱，圆柱的内圆周面设有台阶面，圆柱的小直径段加工有外螺纹，圆柱的大直径段加工有内螺纹；The output housing 10 is a stepped cylinder with an axial through hole, the inner peripheral surface of the cylinder is provided with a stepped surface, the small diameter section of the cylinder is processed with external threads, and the large diameter section of the cylinder is processed with internal threads;
所述绝缘套Ⅲ11的外圆周面设有台阶面；The outer peripheral surface of the insulating sleeve III11 is provided with a stepped surface;
所述垫片1、芯电极2、弹性元件3、芯杆9的材料均采用磷青铜；绝缘套Ⅰ4、绝缘套Ⅱ8、绝缘套Ⅲ11的材料均采用聚四氟乙烯；支撑芯杆5、壳体7、输出壳体10的材料均采用不锈钢；压电元件Ⅰ12和压电元件Ⅱ13的材料均采用石英；导线14为耐高温导线；The gasket 1, the core electrode 2, the elastic element 3, and the core rod 9 are all made of phosphor bronze; the materials of the insulating sleeve I4, the insulating sleeve II8, and the insulating sleeve III11 are all made of polytetrafluoroethylene; the supporting core rod 5, the shell The materials of the body 7 and the output housing 10 are all made of stainless steel; the materials of the piezoelectric element I12 and the piezoelectric element II13 are all made of quartz; the wire 14 is a high temperature resistant wire;
所述件密封垫圈6用于双敏感元件壁面压力传感器的安装使用；The sealing gasket 6 is used for the installation and use of the double sensitive element wall pressure sensor;
其连接关系如下：壳体7的外圆周面通过螺纹固定在输出壳体10大直径段的内圆周面，绝缘套Ⅲ11套装在输出壳体10小直径段的内圆周面，绝缘套Ⅲ11的台阶面抵触在输出壳体10内圆周面的台阶面上；支撑芯杆5套装在壳体7的内圆周面上，支撑芯杆5的小直径段位于远离输出壳体10的一端；绝缘套Ⅱ8套装在支撑芯杆5的盲孔中，芯杆9的大直径段套装在绝缘套Ⅱ8的内圆周面，芯杆9的小直径段套装在绝缘套Ⅲ11的内圆周面，且支撑芯杆5的径向通孔、绝缘套Ⅱ8的径向通孔及芯杆9的径向通孔均同轴形成焊孔，支撑芯杆5的端面、绝缘套Ⅱ8的端面及芯杆9的台阶面均抵触在输出壳体10的台阶面及绝缘套Ⅲ11的端面形成的环形台阶面上；The connection relationship is as follows: the outer peripheral surface of the housing 7 is fixed on the inner peripheral surface of the large-diameter section of the output housing 10 through threads, the insulating sleeve III11 is set on the inner peripheral surface of the small-diameter section of the output housing 10, and the step of the insulating sleeve III11 The surface is in contact with the stepped surface of the inner peripheral surface of the output housing 10; the supporting core rod 5 is sleeved on the inner peripheral surface of the housing 7, and the small diameter section of the supporting core rod 5 is located at the end away from the output housing 10; the insulating sleeve II8 Set in the blind hole of the supporting core rod 5, the large diameter section of the core rod 9 is set on the inner peripheral surface of the insulating sleeve II8, the small diameter section of the core rod 9 is sleeved on the inner peripheral surface of the insulating sleeve III11, and the supporting core rod 5 The radial through hole of the insulating sleeve II8 and the radial through hole of the core rod 9 are all coaxial to form welding holes, and the end face of the supporting core rod 5, the end face of the insulating sleeve II8 and the step surface of the core rod 9 are uniform Interfere with the stepped surface of the output housing 10 and the annular stepped surface formed by the end surface of the insulating sleeve III11;
绝缘套Ⅰ4套装在支撑芯杆5小直径段外圆周面和壳体7的内圆周面形成的环形间隙中，压电元件Ⅰ12、芯电极2、压电元件Ⅱ13及垫片1依次套装在绝缘套Ⅰ4的内圆周面，其中，压电元件Ⅰ12的端面抵触支撑芯杆5小直径段的端面；弹性元件3通过螺纹固定在壳体7的外圆周面，且垫片1的端面抵触在弹性元件3封闭端的内表面，绝缘套Ⅰ4的端面与弹性元件3封闭端的内表面之间留有间隙；导线14位于绝缘套Ⅰ4侧面的不封闭处及支撑芯杆5的凹槽中，导线14的一端通过焊接固定在芯电极2的焊点上，另一端通过焊接固定在所述焊孔中；密封垫圈6套装在壳体7外圆周面，且密封垫圈6的端面抵触输出壳体10大直径段的端面。The insulating sleeve I4 is set in the annular gap formed by the outer peripheral surface of the small-diameter section of the supporting core rod 5 and the inner peripheral surface of the housing 7, and the piezoelectric element I12, the core electrode 2, the piezoelectric element II13 and the gasket 1 are sequentially set in the insulating The inner peripheral surface of the sleeve I4, wherein the end face of the piezoelectric element I12 is in contact with the end face of the small diameter section of the supporting core rod 5; There is a gap between the inner surface of the closed end of the element 3, the end surface of the insulating sleeve I4 and the inner surface of the closed end of the elastic element 3; the wire 14 is located in the unclosed part of the side of the insulating sleeve I4 and the groove of the supporting core rod 5, the wire 14 One end is fixed on the welding spot of the core electrode 2 by welding, and the other end is fixed in the welding hole by welding; the sealing gasket 6 is set on the outer circumferential surface of the casing 7, and the end surface of the sealing gasket 6 is in contact with the large diameter of the output casing 10 segment end.
其安装工艺流程为：(1)将壳体7的外圆周面通过螺纹安装在输出壳体10大直径段的内圆周面，但并不将壳体7与输出壳体10锁紧；The installation process is as follows: (1) Install the outer peripheral surface of the housing 7 on the inner peripheral surface of the large-diameter section of the output housing 10 through threads, but do not lock the housing 7 and the output housing 10;
(2)将导线14的一端焊接在芯电极2的焊点上；(2) welding one end of the wire 14 on the solder joint of the core electrode 2;
(3)将绝缘套Ⅰ4套装在支撑芯杆5小直径段的外圆周面，将压电元件Ⅰ12、带导线14的芯电极2、压电元件Ⅱ13及垫片1依次套装在绝缘套Ⅰ4的内圆周面；(3) Put the insulating sleeve I4 on the outer circumferential surface of the small-diameter section of the supporting core rod 5, and set the piezoelectric element I12, the core electrode 2 with the wire 14, the piezoelectric element II13 and the gasket 1 on the insulating sleeve I4 in sequence. inner peripheral surface;
(4)将绝缘套Ⅱ8、芯杆9依次安装在支撑芯杆5的大直径段的盲孔中；(4) Install the insulating sleeve II 8 and the core rod 9 in the blind hole of the large diameter section supporting the core rod 5 in sequence;
(5)将导线14的另一端焊接在所述焊孔中；(5) welding the other end of the wire 14 in the welding hole;
(6)将绝缘套Ⅲ11套装在输出壳体10小直径段的内圆周面；(6) Set the insulating sleeve III11 on the inner peripheral surface of the small diameter section of the output housing 10;
(7)将带绝缘套Ⅰ4、压电元件Ⅰ12、导线14、芯电极2、压电元件Ⅱ13、垫片1、绝缘套Ⅱ8及芯杆9的支撑芯杆5套装在壳体7内圆周面，并将芯杆9的小直径段套装在绝缘套Ⅲ11中；(7) Set the supporting core rod 5 with insulating sleeve I4, piezoelectric element I12, wire 14, core electrode 2, piezoelectric element II13, gasket 1, insulating sleeve II8 and core rod 9 on the inner circumference of the housing 7 , and set the small-diameter section of the core rod 9 in the insulating sleeve III11;
将件5不锈钢支撑芯杆装配在件7不锈钢内并与件10L5不锈钢输出接口合在一起，再紧固件3磷青铜和件7不锈钢壳体，Assemble the stainless steel supporting core rod of item 5 into the stainless steel of item 7 and combine it with the output interface of item 10L5 stainless steel, and then fasten the phosphor bronze of item 3 and the stainless steel shell of item 7,
(8)将弹性元件3固定在壳体7的外圆周面；(8) elastic element 3 is fixed on the outer peripheral surface of housing 7;
(9)将壳体7与接口壳体10锁紧。(9) Lock the housing 7 and the interface housing 10 tightly.
工作原理：将本发明的传感器安装在被测构件或与测点附近的地面上，且使弹性元件3封闭端的外表面与被测构件的上表面平齐，或与测点附近的地表平齐，芯杆9的盲孔与低噪声电缆的插头连接；Working principle: Install the sensor of the present invention on the measured component or the ground near the measuring point, and make the outer surface of the closed end of the elastic element 3 flush with the upper surface of the measured component, or flush with the ground near the measuring point , the blind hole of the core rod 9 is connected to the plug of the low-noise cable;
当进行野外爆炸试验时，被测构件表面的受到爆炸的冲击波压力或冲击波掠过地面反射后的压力同时作用在与被测构件或地表平齐的传感器的弹性元件3上，弹性元件3将受到的压力通过垫片1传递给芯电极2两端的压电元件Ⅰ12及压电元件Ⅱ13，由于支撑芯杆5固定不动，因此，压电元件Ⅰ12及压电元件Ⅱ13的一端均受到垫片1的向靠近芯杆9的作用力，压电元件Ⅰ12及压电元件Ⅱ13的另一端均受到支撑芯杆5的向靠近垫片1的支撑作用力，压电元件Ⅰ12及压电元件Ⅱ13受挤压将压力转换为电信号，通过芯电极2传递给芯杆9，芯杆9将电信号传递出去。When carrying out the field explosion test, the shock wave pressure on the surface of the component under test or the pressure reflected by the shock wave passing the ground acts on the elastic element 3 of the sensor flush with the component under test or the ground at the same time, and the elastic element 3 will be subjected to The pressure is transmitted to the piezoelectric element I12 and the piezoelectric element II13 at both ends of the core electrode 2 through the gasket 1. Since the supporting core rod 5 is fixed, one end of the piezoelectric element I12 and the piezoelectric element II13 are both supported by the gasket 1. The other end of the piezoelectric element I12 and the piezoelectric element II13 are supported by the supporting force of the supporting core rod 5 towards the gasket 1, and the piezoelectric element I12 and the piezoelectric element II13 are squeezed The pressure converts the pressure into an electrical signal, which is transmitted to the core rod 9 through the core electrode 2, and the core rod 9 transmits the electrical signal.
综上所述，以上仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510671570.8A CN105387966B (en) | 2015-10-13 | 2015-10-13 | A kind of sensitive element wall pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510671570.8A CN105387966B (en) | 2015-10-13 | 2015-10-13 | A kind of sensitive element wall pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105387966A true CN105387966A (en) | 2016-03-09 |
| CN105387966B CN105387966B (en) | 2017-11-28 |
Family
ID=55420508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510671570.8A Active CN105387966B (en) | 2015-10-13 | 2015-10-13 | A kind of sensitive element wall pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387966B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248283A (en) * | 2016-09-23 | 2016-12-21 | 西安近代化学研究所 | A kind of high-temperature-resistance pressure sensor being applicable to temperature and pressure explosive field |
| JP2020056609A (en) * | 2018-09-28 | 2020-04-09 | シチズンファインデバイス株式会社 | Pressure detector and manufacturing method for the same |
| JP2020056611A (en) * | 2018-09-28 | 2020-04-09 | シチズンファインデバイス株式会社 | Pressure detector |
| CN112880914A (en) * | 2021-02-05 | 2021-06-01 | 中国船舶科学研究中心 | Pressure sensor used under deepwater explosion condition |
| CN112964413A (en) * | 2021-02-05 | 2021-06-15 | 中国船舶科学研究中心 | Rod-shaped sensor for measuring pressure of underwater explosion free field |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741888C1 (en) * | 1997-09-23 | 1999-06-17 | Bundesrep Deutschland | Method of determining the impact pressure |
| CN102032969A (en) * | 2010-11-05 | 2011-04-27 | 西安近代化学研究所 | Water shooting pressure measurement sensor |
| CN102494830A (en) * | 2011-12-31 | 2012-06-13 | 北京理工大学 | Method for measuring explosion shock wave field strength and special-purpose pressure tank thereof |
| CN102879144A (en) * | 2012-10-09 | 2013-01-16 | 常州大学 | Method and device for measuring hyperpressure of flammable gas explosion shock waves |
| CN103542962A (en) * | 2013-10-31 | 2014-01-29 | 张丹丹 | Pressure testing device |
| CN103674383A (en) * | 2013-12-05 | 2014-03-26 | 中国科学技术大学 | Piezoelectric film type underwater explosion pressure sensor and measuring method thereof |
-
2015
- 2015-10-13 CN CN201510671570.8A patent/CN105387966B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741888C1 (en) * | 1997-09-23 | 1999-06-17 | Bundesrep Deutschland | Method of determining the impact pressure |
| CN102032969A (en) * | 2010-11-05 | 2011-04-27 | 西安近代化学研究所 | Water shooting pressure measurement sensor |
| CN102494830A (en) * | 2011-12-31 | 2012-06-13 | 北京理工大学 | Method for measuring explosion shock wave field strength and special-purpose pressure tank thereof |
| CN102879144A (en) * | 2012-10-09 | 2013-01-16 | 常州大学 | Method and device for measuring hyperpressure of flammable gas explosion shock waves |
| CN103542962A (en) * | 2013-10-31 | 2014-01-29 | 张丹丹 | Pressure testing device |
| CN103674383A (en) * | 2013-12-05 | 2014-03-26 | 中国科学技术大学 | Piezoelectric film type underwater explosion pressure sensor and measuring method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248283A (en) * | 2016-09-23 | 2016-12-21 | 西安近代化学研究所 | A kind of high-temperature-resistance pressure sensor being applicable to temperature and pressure explosive field |
| JP2020056609A (en) * | 2018-09-28 | 2020-04-09 | シチズンファインデバイス株式会社 | Pressure detector and manufacturing method for the same |
| JP2020056611A (en) * | 2018-09-28 | 2020-04-09 | シチズンファインデバイス株式会社 | Pressure detector |
| JP7016310B2 (en) | 2018-09-28 | 2022-02-04 | シチズンファインデバイス株式会社 | Pressure detector |
| CN112880914A (en) * | 2021-02-05 | 2021-06-01 | 中国船舶科学研究中心 | Pressure sensor used under deepwater explosion condition |
| CN112964413A (en) * | 2021-02-05 | 2021-06-15 | 中国船舶科学研究中心 | Rod-shaped sensor for measuring pressure of underwater explosion free field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105387966B (en) | 2017-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105387966B (en) | A kind of sensitive element wall pressure sensor | |
| JP2008536122A5 (en) | ||
| CN105203246B (en) | A kind of Anti-pressure wall pressure sensor | |
| CN106353654A (en) | High-frequency electromagnetic coupling sensor used for cable partial discharge detection | |
| CN111928991A (en) | Integrated miniature pore pressure sensor | |
| CN102169037B (en) | Embedded type pressure gauge based on shell capacitance changes | |
| CN105758576A (en) | Dual sensitive element pen type free field pressure sensor | |
| CN113534114A (en) | High-stability underwater sound standard device and manufacturing method thereof | |
| CN104614066A (en) | Metal housing sealed type piezoelectric ceramic hydrophone | |
| CN105333939B (en) | The waterproof connector of I-shaped beam type dynamic weighing sensor for vehicle | |
| CN101311716B (en) | Acoustic transducer system for nondestructive testing of cement | |
| CN105784252B (en) | A kind of integral structure round cake free field pressure sensor | |
| CN215639321U (en) | Piezoelectric ultrasonic sensor and detection system for high-temperature pipeline | |
| CN105301466A (en) | Sensor for realizing comprehensive partial discharge detection of transformer | |
| CN206945427U (en) | A kind of pressure head for sonic test during rock triaxial compressions | |
| CN104216064A (en) | Wall outlet fiber-optic connector for transformers | |
| CN104931561B (en) | It is a kind of to realize the electrochemical test experiment device of acoustic emission monitor(ing) under HTHP water environment | |
| CN110208385B (en) | Fluid channel and lead device of acoustic wave sensor under high-pressure environment | |
| CN209513124U (en) | A kind of wideband pressure sensor | |
| CN105203255A (en) | Pressure sensor for underground measurement | |
| CN112504371B (en) | A high temperature radiation resistant ultrasonic sensor | |
| CN110579270A (en) | An Acoustic Sensor Suitable for Strong Electromagnetic Environment | |
| CN204535849U (en) | The piezoelectric ceramic hydrophone of metal shell sealing | |
| CN215004880U (en) | Rock sample holder | |
| RU88236U1 (en) | HYDROPHONE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |