CN112083361A - Method for enhancing trace magnetic moment measurement signal by adding magnetic particles - Google Patents

Abstract

Translated fromChinese

本发明公开了一种添加磁性颗粒来增强微量磁矩量测信号的方法，包括以下步骤：S1：制作没有磁矩各向异性的磁性颗粒；S2：将S1所制作的磁性颗粒均匀混合于非磁性的定型材料，用来制成一任意形状的固体；S3：将S2所制成的固体置于每一感测线圈或磁场传感器或超导量子干涉组件的中心位置；S4：将待测样品放置于感测线圈或磁场传感器或超导量子干涉组件可侦测讯号的范围内进行量测；S5：量测时，可施加不同的外部磁场于待测样品上，并持续对待测样品以一定方式施加一固定量测频率的震动或来回移动，并利用讯号撷取设备将感测线圈内固定量测频率的讯号撷取出来，经扣除S2所贡献的量测讯号即可得到对应待测样品的磁矩大小。

The invention discloses a method for adding magnetic particles to enhance a trace magnetic moment measurement signal, comprising the following steps: S1: making magnetic particles without magnetic moment anisotropy; S2: uniformly mixing the magnetic particles made in S1 in a non-ferrous material Magnetic shaping material, used to make a solid of any shape; S3: Place the solid made by S2 at the center of each sensing coil or magnetic field sensor or superconducting quantum interference component; S4: Place the sample to be tested Place the sensor coil or magnetic field sensor or superconducting quantum interference device within the range of the detectable signal for measurement; S5: During measurement, different external magnetic fields can be applied to the sample to be tested, and the sample to be tested can be continuously applied for a certain amount of time. In this way, a vibration of a fixed measurement frequency is applied or moved back and forth, and the signal of the fixed measurement frequency in the sensing coil is extracted by a signal acquisition device. After deducting the measurement signal contributed by S2, the corresponding sample to be tested can be obtained. size of the magnetic moment.

Description

Translated fromChinese

一种添加磁性颗粒来增强微量磁矩量测信号的方法A method of adding magnetic particles to enhance the measurement signal of trace magnetic moment

技术领域technical field

本发明具体涉及一种添加磁性颗粒来增强微量磁矩量测信号的方法。The invention particularly relates to a method for adding magnetic particles to enhance the measurement signal of trace magnetic moment.

背景技术Background technique

关于量测磁性材料的设备有很多，常用的基础设备有超导量子干涉磁强计(SQUID,Superconducting QUantum Interference Device magnetometer),或振动样品磁强计(VSM,Vibrating Sample Magnetometer)，但设备存在量测讯号较弱的问题，这会影响量测待测样品磁性的准确性。There are many devices for measuring magnetic materials. Commonly used basic devices are superconducting quantum interference magnetometer (SQUID, Superconducting QUantum Interference Device magnetometer), or vibrating sample magnetometer (VSM, Vibrating Sample Magnetometer). The problem of weak measurement signal will affect the accuracy of measuring the magnetic properties of the sample to be tested.

一般量测技术中，在量测待测样品的磁性时，利用振动器以一定的频率和振幅对待测样品进行振动。同时，施加一个静态磁场使待测样品磁化。在待测样品附近放置一组感测线圈来检测线圈中由于磁通变化引起的信号电压，这里磁通变化是由磁化样品的振动引起的。感测线圈的信号水平较低，增加线圈匝数虽可提高信号水平，但同样会导致线圈的电阻增大，不利于量测的灵敏度。信号水平低会影响磁性测量的准确度，因此需要一种增强微量量测信号的方法来解决。In general measurement technology, when measuring the magnetism of the sample to be measured, a vibrator is used to vibrate the sample to be measured at a certain frequency and amplitude. At the same time, a static magnetic field is applied to magnetize the sample to be tested. A set of sensing coils are placed near the sample to be tested to detect the signal voltage in the coils due to changes in the magnetic flux, where the change in magnetic flux is caused by the vibration of the magnetized sample. The signal level of the sensing coil is low. Although increasing the number of coil turns can improve the signal level, it will also increase the resistance of the coil, which is not conducive to the measurement sensitivity. Low signal levels can affect the accuracy of magnetic measurements, so a method of enhancing the signal for micro-measurement is needed.

发明内容SUMMARY OF THE INVENTION

针对上述现有技术中存在的不足，本发明提供一种通过添加磁性颗粒来增强微量磁矩量测信号的方法，利用没有磁矩各向异性的磁性颗粒(如：顺磁或超顺磁微粒或超顺磁纳米颗粒)，将其均匀混合于非磁性的定型材料并制成固体，置于每一感测线圈或磁场传感器或超导量子干涉组件的中心位置，然后将待测样品放置于感测线圈或磁场传感器或超导量子干涉组件可侦测讯号的范围内进行量测。In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for enhancing a trace magnetic moment measurement signal by adding magnetic particles, using magnetic particles without magnetic moment anisotropy (such as paramagnetic or superparamagnetic particles) or superparamagnetic nanoparticles), uniformly mixed with non-magnetic shaped material and made into a solid, placed in the center of each sensing coil or magnetic field sensor or superconducting quantum interference component, and then the sample to be tested was placed in Sensing coils or magnetic field sensors or superconducting quantum interference components can measure within the range of signals.

为了实现上述目的，本发明提供了一种添加磁性颗粒来增强微量磁矩量测信号的方法，包括以下步骤：In order to achieve the above object, the present invention provides a method for adding magnetic particles to enhance the measurement signal of trace magnetic moment, comprising the following steps:

S1：制作没有磁矩各向异性的磁性颗粒；S1: Make magnetic particles without magnetic moment anisotropy;

S2：将S1所制作的磁性颗粒均匀混合于非磁性的定型材料，用来制成一任意形状的固体；S2: The magnetic particles made by S1 are uniformly mixed with the non-magnetic shaping material to make a solid of any shape;

S3：将S2所制成的固体置于每一感测线圈或磁场传感器或超导量子干涉组件的中心位置；S3: Place the solid made of S2 at the center of each sensing coil or magnetic field sensor or superconducting quantum interference component;

S4：将待测样品放置于感测线圈或磁场传感器或超导量子干涉组件可侦测讯号的范围内进行量测；S4: Place the sample to be measured within the range where the sensing coil or magnetic field sensor or superconducting quantum interference component can detect the signal for measurement;

S5：量测时，可施加不同的外部磁场于待测样品上，并持续对待测样品以一定方式施加一固定量测频率的震动或来回移动，并利用讯号撷取设备将感测线圈内固定量测频率的讯号撷取出来，经扣除S2所贡献的量测讯号即可得到对应待测样品的磁矩大小。S5: During measurement, different external magnetic fields can be applied to the sample to be measured, and the sample to be measured can be continuously vibrated or moved back and forth with a fixed measurement frequency in a certain way, and the sensing coil can be fixed by the signal acquisition device. The signal of the measurement frequency is extracted, and the magnitude of the magnetic moment corresponding to the sample to be measured can be obtained by deducting the measurement signal contributed by S2.

优选地，S1中，所述磁性颗粒为顺磁或超顺磁微粒或超顺磁纳米颗粒，所述磁性颗粒内部的磁矩能够随时顺着待测样品散逸磁场或外加磁场方向或其迭加磁场变化。Preferably, in S1, the magnetic particles are paramagnetic or superparamagnetic particles or superparamagnetic nanoparticles, and the magnetic moment inside the magnetic particles can always follow the direction of the sample to be measured escape magnetic field or external magnetic field or its superposition Magnetic field changes.

优选地，S2中，所述非磁性的定型材料为高分子材料、水泥、石膏、黏土或其他可定型材料。Preferably, in S2, the non-magnetic shaping material is a polymer material, cement, gypsum, clay or other shaping materials.

优选地，S3中，所述感测线圈结构或磁场传感器或超导量子干涉组件设计可以为单个、双个或多组成对构成。Preferably, in S3, the design of the sensing coil structure or the magnetic field sensor or the superconducting quantum interference component may be composed of single, double or multiple pairs.

更优选地，当S3中为两两成对倍增的感测线圈时，其中两两成对之间需用串联反接的接法。More preferably, when the sensing coils in S3 are multiplied by two pairs, the connection method of series reverse connection is required between the two pairs.

优选地，S5中，所述讯号撷取方式为：测量感测线圈感应到的磁通量的变化，而顺磁或超顺颗粒也同时对磁通量值起了增强的作用，使产生正比于磁化强度的感应电动势也增强，透过讯号撷取设备撷取出对应的电讯号结果。Preferably, in S5, the signal acquisition method is: measuring the change of the magnetic flux induced by the sensing coil, and the paramagnetic or superparamagnetic particles also enhance the value of the magnetic flux at the same time, so that a magnetic flux proportional to the magnetization is generated. The induced electromotive force is also enhanced, and the corresponding electrical signal results are extracted through the signal acquisition device.

优选地，S5中，所述驱动待测样品振动的方式可为机械驱动、电磁驱动或其他驱动方式。Preferably, in S5, the manner of driving the sample to be tested to vibrate may be mechanical driving, electromagnetic driving or other driving manners.

与现有技术相比，本发明利用没有磁矩各向异性的磁性颗粒，将其均匀混合于非磁性的定型材料并制成固体，置于每一感测线圈或磁场传感器或超导量子干涉组件的中心位置，然后将待测样品放置于感测线圈或磁场传感器或超导量子干涉组件可侦测讯号的范围内进行量测，可解决微量磁矩量测信号弱的问题，增强量测信号，提高量测灵敏度。Compared with the prior art, the present invention utilizes magnetic particles without magnetic moment anisotropy, uniformly mixes them with non-magnetic shaped materials and makes them into solids, and places them in each sensing coil or magnetic field sensor or superconducting quantum interference. The center position of the component, and then place the sample to be measured within the range of the sensing coil or magnetic field sensor or superconducting quantum interference component that can detect the signal. signal to improve measurement sensitivity.

附图说明Description of drawings

图1为本发明实施例的磁性量测系统示意图。FIG. 1 is a schematic diagram of a magnetic measurement system according to an embodiment of the present invention.

图中标记：1、振动器；2、样品杆；3、待测样品；4、电磁铁；5、磁性颗粒；6、感测线圈；7、讯号撷取设备；8、计算机。Labels in the figure: 1. Vibrator; 2. Sample rod; 3. Sample to be tested; 4. Electromagnet; 5. Magnetic particles; 6. Sensing coil; 7. Signal acquisition equipment; 8. Computer.

具体实施方式Detailed ways

下面就结合附图和具体示例进行详细说明。A detailed description will be given below with reference to the accompanying drawings and specific examples.

目前用来量测磁性材料基本物理参数的设备有超导量子干涉磁强计或振动样品磁强计，以下以磁性量测设备作为统称。磁性量测设备在使用过程中存在量测信号较弱的问题，这会影响量测待测样品磁性的准确性。添加磁性颗粒增强微量磁矩量测信号就是通过向磁性量测设备的感测线圈中加入磁性颗粒来加强磁场，使得量测信号增强，为准确量测待测样品的信号做好准备。At present, the devices used to measure the basic physical parameters of magnetic materials include superconducting quantum interference magnetometers or vibrating sample magnetometers, hereinafter referred to as magnetic measurement devices. Magnetic measurement equipment has the problem of weak measurement signal during use, which will affect the accuracy of measuring the magnetic properties of the sample to be measured. Adding magnetic particles to enhance the trace magnetic moment measurement signal is to strengthen the magnetic field by adding magnetic particles to the sensing coil of the magnetic measurement device, so that the measurement signal is enhanced and ready for accurate measurement of the signal of the sample to be measured.

在使用振动样品磁强计进行实际量测时，使用振动器带动磁化场中的待测样品振动，将振动器的电压输出给讯号撷取设备作为参考信号，感测线圈的感应电压传送给讯号撷取设备输出为直流电压，将两相互对应的电压图示化得到磁滞回线，由磁滞回线得知某一磁场下待测样品的磁性参数。When using the vibrating sample magnetometer for actual measurement, the vibrator is used to drive the sample to be measured in the magnetized field to vibrate, the voltage of the vibrator is output to the signal acquisition device as a reference signal, and the induced voltage of the sensing coil is transmitted to the signal The output of the acquisition device is a DC voltage, and the two corresponding voltages are graphically obtained to obtain a hysteresis loop, and the magnetic parameters of the sample to be tested under a certain magnetic field can be obtained from the hysteresis loop.

本发明利用没有磁矩各向异性的磁性颗粒，将其均匀混合于非磁性的定型材料并制成固体，置于每一感测线圈的中心位置，然后将待测样品放置于感测线圈可侦测讯号的范围内进行量测，可以增强感测线圈的量测讯号。The present invention utilizes magnetic particles without magnetic moment anisotropy, uniformly mixes them with non-magnetic shaping materials and makes them into solids, and places them at the center of each sensing coil, and then places the sample to be tested on the sensing coil to obtain a solid state. Measuring within the range of the detection signal can enhance the measurement signal of the sensing coil.

鉴于此，本发明实施例提供了一种添加磁性颗粒来增强微量磁矩量测信号的方法，包括以下步骤：S1：制作没有磁矩各向异性的磁性颗粒；S2：将S1所制作的磁性颗粒均匀混合于非磁性的定型材料，用来制成一任意形状的固体；S3：将S2所制成的固体置于每一感测线圈的中心位置；S4：将待测样品放置于感测线圈可侦测讯号的范围内进行量测；S5：量测时，可施加不同的外部磁场于待测样品上，使用振动器带动磁化场中的待测样品以一固定量测频率振动，将振动器的电压输出给讯号撷取设备作为参考信号，并利用讯号撷取设备将感测线圈内固定量测频率的讯号撷取出来，经扣除S2所贡献的量测讯号即可得到对应待测样品的磁矩大小。In view of this, an embodiment of the present invention provides a method for adding magnetic particles to enhance a trace magnetic moment measurement signal, including the following steps: S1: making magnetic particles without magnetic moment anisotropy; The particles are uniformly mixed with the non-magnetic shaping material to make a solid of any shape; S3: The solid made by S2 is placed in the center of each sensing coil; S4: The sample to be tested is placed on the sensing coil The coil can measure within the range of the detected signal; S5: During measurement, different external magnetic fields can be applied to the sample to be measured, and a vibrator can be used to drive the sample to be measured in the magnetized field to vibrate at a fixed measurement frequency. The voltage of the vibrator is output to the signal acquisition device as a reference signal, and the signal of the fixed measurement frequency in the sensing coil is extracted by the signal acquisition device, and the corresponding measurement signal to be measured can be obtained by deducting the measurement signal contributed by S2 The magnitude of the magnetic moment of the sample.

该方法的具体操作过程如下：The specific operation process of this method is as follows:

S1：制作没有磁矩各向异性的磁性颗粒，所述磁性颗粒为顺磁或超顺磁微粒或超顺磁纳米颗粒，所述磁性颗粒内部的磁矩能够随时顺着待测样品散逸磁场或外加磁场方向或其迭加磁场变化。S1: Make magnetic particles without magnetic moment anisotropy, the magnetic particles are paramagnetic or superparamagnetic particles or superparamagnetic nanoparticles, and the magnetic moment inside the magnetic particles can dissipate the magnetic field along the sample to be tested at any time or The direction of the applied magnetic field or its superimposed magnetic field changes.

S2：将S1所制作的磁性颗粒均匀混合于非磁性的定型材料，用来制成一任意形状的固体，所述非磁性的定型材料为高分子材料、水泥、石膏、黏土或其他可定型材料。S2: The magnetic particles made by S1 are uniformly mixed with a non-magnetic setting material to make a solid of any shape. The non-magnetic setting material is a polymer material, cement, gypsum, clay or other setting materials. .

S3：将S2所制成的固体置于每一感测线圈的中心位置，所述感测线圈结构设计可以为单个、双个或多组成对构成；S3: Place the solid body made by S2 at the center of each sensing coil, and the sensing coil structure design can be composed of single, double or multiple pairs;

需要说明的是，当S3中为两两成对倍增的感测线圈时，其中两两成对之间需用串联反接的接法。It should be noted that, when the sensing coils in S3 are multiplied in pairs, the connection method in series reverse connection is required between the pairs.

S4：将待测样品放置于感测线圈可侦测讯号的范围内进行量测；S4: Place the sample to be tested within the range of the signal detectable by the sensing coil for measurement;

S5：量测时，可施加不同的外部磁场于待测样品上，使用振动器带动磁化场中的待测样品以一固定量测频率振动，将振动器的电压输出给讯号撷取设备作为参考信号，并利用讯号撷取设备将感测线圈内固定量测频率的讯号撷取出来，经扣除S2所贡献的量测讯号即可得到对应待测样品的磁矩大小。S5: During measurement, different external magnetic fields can be applied to the sample to be measured, and a vibrator is used to drive the sample to be measured in the magnetized field to vibrate at a fixed measurement frequency, and the voltage of the vibrator is output to the signal acquisition device as a reference signal, and the signal of the fixed measurement frequency in the sensing coil is extracted by the signal acquisition device, and the magnetic moment corresponding to the sample to be measured can be obtained by deducting the measurement signal contributed by S2.

需要说明的是，S5中，所述讯号撷取方式为：测量感测线圈感应到的磁通量的变化，而顺磁或超顺颗粒也同时对磁通量值起了增强的作用，使产生正比于磁化强度的感应电动势也增强，透过讯号撷取设备撷取出对应的电讯号结果。It should be noted that, in S5, the signal acquisition method is: measuring the change of the magnetic flux sensed by the sensing coil, and the paramagnetic or superparamagnetic particles also enhance the magnetic flux value at the same time, so that the generation is proportional to the magnetization The intensity of the induced electromotive force is also increased, and the corresponding electrical signal results are extracted through the signal acquisition device.

需要说明的是，S5中，所述驱动待测样品振动的方式可为机械驱动、电磁驱动或其他驱动方式。It should be noted that, in S5, the manner of driving the sample to be tested to vibrate may be mechanical driving, electromagnetic driving or other driving manners.

本发明描述了优选实施例及其效果。但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。The present invention describes preferred embodiments and their effects. However, once those skilled in the art are aware of the basic inventive concepts, additional changes and modifications may be made to these embodiments. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. A method for enhancing a micro magnetic moment measurement signal by adding magnetic particles is characterized by comprising the following steps:

s1: manufacturing magnetic particles without magnetic moment anisotropy;

s2: uniformly mixing the magnetic particles prepared by the S1 with a non-magnetic setting material to prepare a solid with any shape;

s3: placing the solid body made in S2 at the center of each sensing coil or magnetic field sensor or superconducting quantum interference component;

s4: placing a sample to be measured in a range in which a sensing coil or a magnetic field sensor or a superconducting quantum interference component can detect signals for measurement;

s5: during measurement, different external magnetic fields can be applied to the sample to be measured, vibration with a fixed measurement frequency or reciprocating movement is continuously applied to the sample to be measured in a certain mode, signals of the fixed measurement frequency in the sensing coil are extracted by using signal acquisition equipment, and the magnetic moment of the corresponding sample to be measured can be obtained by deducting the measurement signals contributed by S2.

2. The method of claim 1, wherein in step S1, the magnetic particles are paramagnetic or superparamagnetic particles or superparamagnetic nanoparticles, and magnetic moments inside the magnetic particles can change along a direction of an stray magnetic field or an applied magnetic field of a sample to be measured or a superimposed magnetic field thereof at any time.

3. The method of claim 1, wherein in step S2, the non-magnetic setting material is polymer material, cement, gypsum, clay or other settable material.

4. The method of claim 1, wherein in step S3, the sensing coil structure or the magnetic field sensor or the superconducting quantum interference element design can be single, double or multi-group paired.

5. The method of claim 1, wherein the pairs of the sensing coils in S3 are multiplied by two pairs, wherein the pairs are connected in series and in reverse.

6. The method of claim 1, wherein in step S5, the signal is extracted by: the change of the magnetic flux induced by the sensing coil is measured, and the paramagnetic or superparamagnetic particles also enhance the magnetic flux value, so that the induced electromotive force which is generated in proportion to the magnetization intensity is enhanced, and the corresponding electric signal result is captured by the signal capturing equipment.

7. The method of claim 1, wherein in step S5, the driving means for driving the sample to be tested to vibrate may be mechanical driving, electromagnetic driving, or other driving means.

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