WO2020057080A1 - 一种用于转动结构状态监测的多参数lc传感器 - Google Patents

一种用于转动结构状态监测的多参数lc传感器 Download PDF

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WO2020057080A1
WO2020057080A1 PCT/CN2019/079133 CN2019079133W WO2020057080A1 WO 2020057080 A1 WO2020057080 A1 WO 2020057080A1 CN 2019079133 W CN2019079133 W CN 2019079133W WO 2020057080 A1 WO2020057080 A1 WO 2020057080A1
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sensor
rotating structure
parameter
coil
turn
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王立峰
董蕾
黄庆安
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Southeast University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means

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  • the invention relates to the field of pressure sensors, in particular to a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • a large number of rotating structures are used in various industrial production equipment and transportation equipment, such as bearing structures and gear structures. These rotating structures work under severe conditions such as high loads and high speeds for a long time, and are one of the most prone to failure in mechanical equipment. Therefore, it is very necessary to monitor the working condition of the rotating structure.
  • Wireless active sensor systems are mainly used for condition monitoring of rotating structures at critical locations.
  • Wireless active sensors generally use RF transceiver circuits for data transmission, and their transceiver circuits rely on batteries for power. Due to the battery, this sensor system cannot work for a long time without interruption. And because it contains active components, its operating temperature should not be too high.
  • the wireless passive LC sensor uses the principle of inductive near-field coupling to transmit data and does not require battery power.
  • the LC sensor system is composed of passive components, which is especially suitable for the harsh environment of high temperature oil pollution. Therefore, the wireless passive multi-parameter LC sensor system is an ideal solution for the condition monitoring of rotating structures.
  • the present invention proposes a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • a multi-resonance point LC resonance circuit is formed by a plurality of capacitive sensors and an inductance unit, and the difference is wirelessly and passively read.
  • the resonance frequency value obtains the real-time status of the rotating structure, and realizes real-time monitoring of multiple state parameters of the rotating structure.
  • it adopts wireless passive reading mode, which can be used for long-term maintenance-free use, suitable for use in harsh environments such as high temperature and oil pollution.
  • a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • the sensor includes an inductive unit and a plurality of capacitive sensors provided on the rotating structure.
  • the inductive power supply includes a plurality of single-turn coils connected in sequence. Capacitive sensors are connected at both ends, and an output coil is provided on the periphery of the inductive unit.
  • the output coil is used for passive wireless output of multiple resonant frequencies generated by multiple capacitive sensors, each resonant frequency and different state parameters of the rotating structure. Corresponding.
  • the inductance unit includes a first single-turn coil, a second single-turn coil, and a third single-turn coil connected in order, and the sizes of the first single-turn coil, the second single-turn coil, and the third single-turn coil are sequentially increased.
  • each single-turn coil is an arc shape.
  • each single-turn coil includes a metal layer, an insulation layer, and an adhesion layer which are sequentially arranged from top to bottom.
  • each single-turn coil is fixed on the rotating structure through an adhesive layer.
  • the plurality of capacitive sensors include a first capacitive sensor, a second capacitive sensor, and a third capacitive sensor, two ends of the first capacitive sensor are fixed to both ends of the first single-turn coil, and the second capacitive sensor Both ends of the sensor are fixed to both ends of the second single-turn coil, and both ends of the third capacitive sensor are fixed to both ends of the third single-turn coil.
  • the output coil outputs a first resonant frequency generated by the first capacitive sensor, a second resonant frequency generated by the second capacitive sensor, and a third resonant frequency generated by the third capacitive sensor.
  • the inductance unit, the output coil and the rotating structure are arranged coaxially.
  • the shape of the output coil is a circular ring.
  • the present invention has the following technical effects:
  • the present invention provides a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • the sensor includes an inductive unit and a plurality of capacitive sensors provided on the rotating structure.
  • the inductive power source includes a plurality of single-turn coils connected in sequence. Capacitive sensors are connected to both ends of the single-turn coil, and an output coil is provided on the periphery of the inductive unit.
  • the output coil is used for passive wireless output of multiple resonant frequencies generated by multiple capacitive sensors, each resonant frequency and rotation structure. Corresponding to the different status parameters.
  • the above sensor is provided with a plurality of interconnected capacitive sensors and inductive units on the rotating structure.
  • the capacitive sensor detects a change in the state of the rotating structure, the corresponding resonant frequency will be changed accordingly, and different resonances can be read passively through wireless.
  • the frequency value can obtain the real-time status of the rotating structure, so as to realize the real-time status monitoring of the rotating structure.
  • the wireless passive reading method is used.
  • the sensor has no leads connected and no battery is required. It can be used for long-term maintenance-free use after installation. Use in harsh environments such as high temperature and oil pollution.
  • FIG. 1 is a schematic structural diagram of a multi-parameter LC sensor for condition monitoring of a rotating structure according to an embodiment of the present invention
  • FIG. 2 is a plan structural view of an inductor unit according to an embodiment of the present invention.
  • Inductive unit 11. First single-turn coil; 12. Second single-turn coil; 13. Third single-turn coil; 14. Metal layer; 15. Insulation layer; 16. Adhesive layer; 2. Capacitive Sensor; 21, first capacitive sensor; 22, second capacitive sensor; 23, third capacitive sensor; 3, output coil; 4, rotating structure.
  • an embodiment of the present invention proposes a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • the sensor includes an inductive unit 1 and a plurality of capacitive sensors 2 provided on the rotating structure. Multiple single-turn coils connected in sequence, each end of each single-turn coil is connected to a capacitive sensor, an output coil 3 is provided on the periphery of the inductance unit, and the output coil 3 is used for passive wireless output of multiple capacitive sensors. Multiple resonance frequencies, each of which corresponds to a different state parameter of the rotating structure.
  • the above-mentioned multi-parameter LC sensor is provided with a plurality of interconnected capacitive sensors and inductive units on the rotating structure.
  • the capacitive sensor detects a change in the state of the rotating structure, the corresponding resonant frequency will be changed accordingly.
  • the real-time status of the rotating structure can be obtained by taking different resonance frequency values, so as to realize the real-time status monitoring of the rotating structure.
  • the wireless passive reading method is used.
  • the sensor has no leads connected and no battery is required. It can be maintenance-free for a long time after installation Use, suitable for use in harsh environments such as high temperature and oil pollution.
  • the inductance unit 1 includes a plurality of first single-turn coils, and the number of single-turn coils is greater than or equal to two, such as three, four, five, and the like.
  • the inductance unit 1 includes a first single-turn coil 11, a second single-turn coil 12 and a third single-turn coil 13, a first single-turn coil 11, a second single-turn coil 12, and a third single-turn coil connected in this order.
  • the size of 13 increases in sequence, and the three single-turn coils are connected end to end.
  • each single-turn coil is a shape such as an arc, a square, a pentagon, or a triangle.
  • each single-turn coil is an arc shape, that is, the radius of the arc gradually increases from one end to the other end, and is arranged coaxially with the rotating structure so that each single-turn coil can rotate around the rotating structure. Or rotate synchronously with the rotating structure.
  • each single-turn coil includes a metal layer 14, an insulating layer 15, and an adhesive layer 16 which are disposed in this order from top to bottom.
  • the material of the metal layer 14 is any kind of conductive material; the material of the insulating layer 15 is a resin material capable of performing an insulating function; and the adhesive layer 16 functions as a connection.
  • each single-turn coil is fixed on the rotating structure through the adhesive layer 16.
  • the plurality of capacitive sensors include a first capacitive sensor 21, a second capacitive sensor 22, and a third capacitive sensor 23. Both ends of the first capacitive sensor 21 are fixed to both ends of the first single-turn coil 11. Both ends of the second capacitive sensor 12 are fixed to both ends of the second single-turn coil 22, and both ends of the third capacitive sensor 23 are fixed to both ends of the third single-turn coil 13.
  • the output coil 3 outputs a first resonant frequency generated by the first capacitive sensor, a second resonant frequency generated by the second capacitive sensor, and a third resonant frequency generated by the third capacitive sensor.
  • the inductance unit 1, the output coil 3 and the rotating structure 4 are arranged coaxially.
  • the shape of the output coil 3 is a circular ring.
  • the working principle of the invention is that an LC resonance circuit will be formed after the inductor and the capacitor are connected.
  • three capacitive sensors ie, 21, the first capacitive sensor; 22, the second capacitive sensor; 23, the third capacitive sensor
  • the three-segment single-turn coil 11, the first single-turn coil of the inductance unit, respectively 12, the second single-turn coil; 13, and the third single-turn coil
  • the readout coil connected to the impedance analyzer can wirelessly and passively read these resonance frequency values and their changes, thereby obtaining the real-time state of the rotating structure.
  • the sensor of the present invention needs to be calibrated with a readout coil connected to an impedance analyzer to establish a relationship between the three resonance frequencies and the state parameters of the three capacitive sensors.
  • the three resonance frequencies of the sensor of the present invention are read out using a readout coil connected to an impedance analyzer, and compared with the calibration values, three state parameters of the rotating structure to be measured can be obtained.
  • the present invention provides a multi-parameter LC sensor for monitoring the state of a rotating structure.
  • the sensor includes an inductive unit and a plurality of capacitive sensors provided on the rotating structure.
  • the inductive power supply includes a plurality of single-turn coils connected in sequence. Capacitive sensors are connected to both ends of each single-turn coil, and an output coil is provided on the periphery of the inductive unit.
  • the output coil is used for passive wireless output of multiple resonant frequencies generated by multiple capacitive sensors. Each resonant frequency Corresponds to different state parameters of the rotating structure.
  • the above sensor is provided with a plurality of interconnected capacitive sensors and inductive units on the rotating structure.
  • the capacitive sensor detects a change in the state of the rotating structure, the corresponding resonant frequency will be changed accordingly, and different resonances can be read passively through wireless.
  • the frequency value can obtain the real-time status of the rotating structure, thereby real-time monitoring of the rotating structure.
  • the wireless passive reading method is adopted, the sensor is connected without leads, and no battery is required. After installation, it can be maintenance-free for a long time, suitable for use in harsh environments such as high temperature and oil pollution.

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Abstract

一种用于转动结构（4）状态监测的多参数LC传感器，包括设置于转动结构（4）上的电感单元（1）与多个电容式传感器（2），电感单元（1）包括多个依次连接的单匝线圈（11，12，13），每一个单匝线圈（11，12，13）的两端分别连接有电容式传感器（2），电感单元（1）的外周设置有输出线圈（3），输出线圈（3）用于无源无线的输出多个电容式传感器（2）产生的多个谐振频率，每一个谐振频率与转动结构（4）的不同状态参数相对应。该传感器实现了对转动结构（4）的多个状态参数实时监测，可长期免维护使用，适合在高温、油污等恶劣环境中使用。

Description

一种用于转动结构状态监测的多参数LC传感器 技术领域
本发明涉及压力传感器领域，尤其涉及一种用于转动结构状态监测的多参数LC传感器。
背景技术
在各种工业生产设备和交通运输装备上会用到大量的转动结构，例如轴承结构、齿轮结构等。这些转动结构长期处于高载荷、高转速等恶劣条件下工作，是机械设备中最容易发生故障的部位之一。因此对于转动结构的工作状态监测就显得十分必要。
由于转动结构工作时处于旋转状态，因此传统的有线传感器不适用于对转动结构的状态进行实时监测。目前，对于关键部位转动结构的状态监测主要使用无线有源的传感器系统。无线有源的传感器一般采用射频收发电路进行数据传输，其收发电路依靠电池进行供电。由于含有电池，这种传感器系统不能长期地、不间断工作。并且，因为含有有源元件，其工作温度也不能太高。
机械转动部件通常是处于高温的或油污的环境。在这种恶劣环境下，传感器中不宜使用有源电路和电池。无线无源的LC传感器采用电感近场耦合原理传输数据，不需要电池供电。同时，LC传感器系统是由无源元件构成的，特别适用于高温油污的恶劣环境。因此对于转动结构的状态监测，无线无源的多参数LC传感器系统是一种较为理想的解决方案。
发明内容
针对现有技术存在的问题，本发明提出一种用于转动结构状态监测的多参数LC传感器，通过多个电容式传感器与电感单元形成多谐振点LC谐 振电路，通过无线无源的读取不同谐振频率值获取转动结构的实时状态，实现对转动结构的多个状态参数实时监测，此外采用无线无源的读取方式，可长期免维护使用，适合在高温、油污等恶劣环境中使用。
为了实现上述技术目的，本发明实施例采用如下技术方案：
一种用于转动结构状态监测的多参数LC传感器，该传感器包括设置于转动结构上的电感单元与多个电容式传感器，电感电源包括多个依次连接的单匝线圈，每一个单匝线圈的两端分别连接有电容式传感器，电感单元的外周设置有输出线圈，输出线圈用于无源无线的输出多个电容式传感器产生的多个谐振频率，每一个谐振频率与转动结构的不同状态参数相对应。
进一步的，电感单元包括依次连接的第一单匝线圈、第二单匝线圈与第三单匝线圈，第一单匝线圈、第二单匝线圈与第三单匝线圈的尺寸依次增大。
进一步的，每一个单匝线圈的形状为弧线形。
进一步的，每一个单匝线圈包括从上到下依次设置的金属层、绝缘层与黏附层。
进一步的，每一个单匝线圈通过黏附层固定于转动结构上。
进一步的，多个电容式传感器包括第一电容式传感器、第二电容式传感器与第三电容式传感器，第一电容式传感器的两端与第一单匝线圈的两端固定，第二电容式传感器的两端与第二单匝线圈的两端固定，第三电容式传感器的两端与第三单匝线圈的两端固定。
进一步的，输出线圈输出第一电容式传感器产生的第一谐振频率和第二电容式传感器产生的第二谐振频率和第三电容式传感器产生的第三谐振频率。
进一步的，电感单元、输出线圈与转动结构同轴设置.
进一步的，输出线圈的形状为圆环。
相较于现有技术，本发明具有如下技术效果：
本发明提出了一种用于转动结构状态监测的多参数LC传感器，该传感 器包括设置于转动结构上的电感单元与多个电容式传感器，电感电源包括多个依次连接的单匝线圈，每一个单匝线圈的两端分别连接有电容式传感器，电感单元的外周设置有输出线圈，输出线圈用于无源无线的输出多个电容式传感器产生的多个谐振频率，每一个谐振频率与转动结构的不同状态参数相对应。上述传感器通过在转动结构上设置相互连接的多个电容式传感器与电感单元，当电容式传感器检测到转动结构的状态变化时会使相应谐振频率产生相应变化，通过无线无源的读取不同谐振频率值即可获取转动结构的实时状态，从而实现对转动结构的实时状态监测，此外采用无线无源的读取方式，传感器无引线连出、不需要电池，安装后可长期免维护使用，适合在高温、油污等恶劣环境中使用。
附图说明
图1为本发明实施例提出的一种用于转动结构状态监测的多参数LC传感器的结构示意图；
图2为本发明实施例提出的电感单元的平面结构图；
其中：1、电感单元；11、第一单匝线圈；12、第二单匝线圈；13、第三单匝线圈；14、金属层；15、绝缘层；16、黏附层；2、电容式传感器；21、第一电容式传感器；22、第二电容式传感器；23、第三电容式传感器；3、输出线圈；4、转动结构。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表 示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
如图1所示，本发明实施例提出了一种用于转动结构状态监测的多参数LC传感器，该传感器包括设置于转动结构上的电感单元1与多个电容式传感器2，电感单元1包括多个依次连接的单匝线圈，每一个单匝线圈的两端分别连接有电容式传感器，电感单元的外周设置有输出线圈3，输出线圈3用于无源无线的输出多个电容式传感器产生的多个谐振频率，每一个谐振频率与转动结构的不同状态参数相对应。
上述多参数LC传感器通过在转动结构上设置相互连接的多个电容式传感器与电感单元，当电容式传感器检测到转动结构的状态变化时会使相应谐振频率产生相应变化，通过无线无源的读取不同谐振频率值即可获取转动结构的实时状态，从而实现对转动结构的实时状态监测，此外采用无线无源的读取方式，传感器无引线连出、不需要电池，安装后可长期免维护使用，适合在高温、油污等恶劣环境中使用。
优选的，电感单元1包括多个第一单匝线圈，单匝线圈的数量大于等于2，如3个、4个、5个等等。
优选的，电感单元1包括依次连接的第一单匝线圈11、第二单匝线圈12与第三单匝线圈13，第一单匝线圈11、第二单匝线圈12与第三单匝线圈13的尺寸依次增大，三个单匝线圈首尾依次相连。
优选的，每一个单匝线圈的形状为圆弧形、方形、五边行或者三角形等形状。
优选的，每一个单匝线圈的形状为弧线形，即从其一端到另一端弧线的半径逐步增大，且与转动结构同轴设置，以使得每个单匝线圈能够围绕转动结构转动或者与转动结构同步转动。
优选的，如图2所示，每一个单匝线圈包括从上到下依次设置的金属层14、绝缘层15与黏附层16。其中金属层14的材料为任意一种导电材料； 绝缘层15的材料为能够起到绝缘作用的树脂材料；黏附层16起到连接的作用。
优选的，每一个单匝线圈通过黏附层16固定于转动结构上。
优选的，多个电容式传感器包括第一电容式传感器21、第二电容式传感器22与第三电容式传感器23，第一电容式传感器21的两端与第一单匝线圈11的两端固定，第二电容式传感器12的两端与第二单匝线圈22的两端固定，第三电容式传感器23的两端与第三单匝线圈13的两端固定。
优选的，输出线圈3输出第一电容式传感器产生的第一谐振频率和第二电容式传感器产生的第二谐振频率和第三电容式传感器产生的第三谐振频率。
优选的，电感单元1、输出线圈3与转动结构4同轴设置.
优选的，输出线圈3的形状为圆环。
本发明的工作原理为：电感和电容连接后将形成LC谐振回路。通过将三个电容传感器(即21、第一电容式传感器；22、第二电容式传感器；23、第三电容式传感器)分别与电感单元的三段单匝线圈(11、第一单匝线圈；12、第二单匝线圈；13、第三单匝线圈)进行连接，可以得到含有三个谐振频率的LC谐振回路。当电容传感器中的一个或多个监测到转动结构的状态变化时，会使所述多参数LC传感器的一个或多个谐振频率产生相应变化。基于平面电感之间的近场耦合原理，采用连接阻抗分析仪的读出线圈，可以无线、无源地读出这些谐振频率值及其变化，从而获取转动结构的实时状态。
进一步的，为了能够实时监测转动结构状态，测量前，需要使用连接阻抗分析仪的读出线圈对本发明的传感器进行标定，建立三个谐振频率与三个电容传感器状态参量之间的关系。测量时，使用连接阻抗分析仪的读出线圈读出本发明传感器的三个谐振频率，与标定值进行对比，即可得到待测转动结构的三种状态参量。
综上，本发明提出了一种用于转动结构状态监测的多参数LC传感器， 该传感器包括设置于转动结构上的电感单元与多个电容式传感器，电感电源包括多个依次连接的单匝线圈，每一个单匝线圈的两端分别连接有电容式传感器，电感单元的外周设置有输出线圈，输出线圈用于无源无线的输出多个电容式传感器产生的多个谐振频率，每一个谐振频率与转动结构的不同状态参数相对应。上述传感器通过在转动结构上设置相互连接的多个电容式传感器与电感单元，当电容式传感器检测到转动结构的状态变化时会使相应谐振频率产生相应变化，通过无线无源的读取不同谐振频率值即可获取转动结构的实时状态，从而实现对转动结构的实时状态监测。此外采用无线无源的读取方式，传感器无引线连出、不需要电池，安装后可长期免维护使用，适合在高温、油污等恶劣环境中使用。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能单元的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能单元完成，即将装置的内部结构划分成不同的功能单元，以完成以上描述的全部或者部分功能。上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (9)

  1. 一种用于转动结构状态监测的多参数LC传感器，其特征在于，所述传感器包括设置于转动结构上的电感单元与多个电容式传感器，所述电感电源包括多个依次连接的单匝线圈，每一个所述单匝线圈的两端分别连接有电容式传感器，所述电感单元的外周设置有输出线圈，所述输出线圈用于无源无线的输出所述多个电容式传感器产生的多个谐振频率，每一个所述谐振频率与所述转动结构的不同状态参数相对应。
  2. 如权利要求1所述的用于转动结构状态监测的多参数LC传感器，其特征在于，所述电感单元包括依次连接的第一单匝线圈、第二单匝线圈与第三单匝线圈，所述第一单匝线圈、第二单匝线圈与第三单匝线圈的尺寸依次增大。
  3. 如权利要求1所述的用于转动结构状态监测的多参数LC传感器，其特征在于，每一个所述单匝线圈的形状为弧线形。
  4. 如权利要求1所述的用于转动结构状态监测的多参数LC传感器，其特征在于，每一个所述单匝线圈包括从上到下依次设置的金属层、绝缘层与黏附层。
  5. 如权利要求4所述的用于转动结构状态监测的多参数LC传感器，其特征在于，每一个所述单匝线圈通过所述黏附层固定于所述转动结构上。
  6. 如权利要求2所述的用于转动结构状态监测的多参数LC传感器，其特征在于，所述多个电容式传感器包括第一电容式传感器、第二电容式传感器与第三电容式传感器，所述第一电容式传感器的两端与所述第一单匝线圈的两端固定，所述第二电容式传感器的两端与所述第二单匝线圈的两端固定，所述第三电容式传感器的两端与所述第三单匝线圈的两端固定。
  7. 如权利要求6所述的用于转动结构状态监测的多参数LC传感器，其特征在于，所述输出线圈输出所述第一电容式传感器产生的第一谐振频率和所述第二电容式传感器产生的第二谐振频率和所述第三电容式传感器产生的第 三谐振频率。
  8. 如权利要求1所述的用于转动结构状态监测的多参数LC传感器，其特征在于，所述电感单元、所述输出线圈与所述转动结构同轴设置.
  9. 如权利要求1所述的用于转动结构状态监测的多参数LC传感器，其特征在于，所述输出线圈的形状为圆环。
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