阅读说明：本技术 一种基于磁性颗粒的悬臂梁式磁场探测装置 (Cantilever beam type magnetic field detection device based on magnetic particles ) 是由 不公告发明人 于 2020-07-31 设计创作，主要内容包括：本发明涉及磁场探测领域,具体提供了一种基于磁性颗粒的悬臂梁式磁场探测装置,悬臂梁固定在振源上,压电材料块设置在悬臂梁顶面上靠近固定端的部位,压电材料块与外部电路连接,中空槽板设置在悬臂梁上,液体设置在中空槽板内,磁性颗粒掺杂在液体内。应用时,在待测磁场的作用下,磁性颗粒受到磁场力的作用,磁性颗粒在液体中移动,磁性颗粒的移动改变了悬臂梁整体的质量分布,从而改变了悬臂梁的共振频率,通过测量该共振频率的改变实现磁场探测。本发明结构简单、成本低。另外,因为悬臂梁的固有共振频率对悬臂梁整体的质量分布非常敏感,所以本发明具有磁场探测灵敏度高的优点,在磁场探测领域具有重要的应用前景。(The invention relates to the field of magnetic field detection, and particularly provides a cantilever beam type magnetic field detection device based on magnetic particles. During application, under the action of a magnetic field to be detected, the magnetic particles are acted by the action of the magnetic field force, the magnetic particles move in the liquid, and the movement of the magnetic particles changes the overall mass distribution of the cantilever beam, so that the resonance frequency of the cantilever beam is changed, and magnetic field detection is realized by measuring the change of the resonance frequency. The invention has simple structure and low cost. In addition, because the inherent resonance frequency of the cantilever beam is very sensitive to the overall mass distribution of the cantilever beam, the invention has the advantage of high magnetic field detection sensitivity and has important application prospect in the field of magnetic field detection.)

1. An apparatus for detecting a magnetic field of a cantilever beam type based on magnetic particles, comprising: the piezoelectric vibration generator comprises a vibration source, a cantilever beam, a piezoelectric material block, a hollow groove plate, liquid and magnetic particles; the cantilever beam is fixed on the vibration source, the piezoelectric material block is arranged on the top surface of the cantilever beam and close to the fixed end, the piezoelectric material block is connected with an external circuit, the hollow groove plate is arranged on the cantilever beam, the liquid is arranged in the hollow groove plate, and the magnetic particles are doped in the liquid.

2. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 1, wherein: the hollow groove plate is rectangular, and the long edge of the rectangle is along the direction of the cantilever beam.

3. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 1, wherein: the hollow groove plate is in a beam waist shape, and the rotational symmetry axis of the beam waist shape is along the direction of the cantilever beam.

4. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 1, wherein: the hollow groove plate is a right-angled triangle, one right-angled edge of the right-angled triangle is along the direction of the cantilever beam, and the other right-angled edge of the right-angled triangle is perpendicular to the direction of the cantilever beam and is close to the free end of the cantilever beam.

5. An apparatus for detecting an izod magnetic field based on magnetic particles according to any one of claims 1 to 4, wherein: the hollow groove plate extends out of the free end of the cantilever beam.

6. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 5, wherein: the cantilever beam is made of aluminum alloy, silicon, semiconductor materials and diamond.

7. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 6, wherein: the piezoelectric material block is made of piezoelectric ceramic or polyvinylidene fluoride.

8. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 7, wherein: the liquid is ethanol.

9. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 8, wherein: the magnetic particles are ferroferric oxide particles.

10. The magnetic particle-based cantilever-type magnetic field detecting device according to claim 9, wherein: the hollow groove plate is made of copper.

Technical Field

The invention relates to the field of magnetic field detection, in particular to a cantilever beam type magnetic field detection device based on magnetic particles.

Background

The existing magnetic field detection technology is mainly based on Hall effect, nuclear magnetic resonance effect, Faraday electromagnetic induction and other effects, and has complex equipment and high cost. The exploration of magnetic field measurement technology based on other principles, the reduction of equipment complexity and cost are important directions for the development of the current magnetic field detection technology.

Disclosure of Invention

In order to solve the above problems, the present invention provides a cantilever-beam magnetic field detection device based on magnetic particles, comprising: the piezoelectric vibration generator comprises a vibration source, a cantilever beam, a piezoelectric material block, a hollow groove plate, liquid and magnetic particles; the cantilever beam is fixed on the vibration source, the piezoelectric material block is arranged on the top surface of the cantilever beam close to the fixed end and connected with an external circuit, the hollow groove plate is arranged on the cantilever beam, the liquid is arranged in the hollow groove plate, and the magnetic particles are doped in the liquid.

Further, the hollow groove plate is rectangular, and the long side of the rectangle is along the cantilever beam direction.

Furthermore, the hollow slot plate is in a beam waist shape, and the rotation symmetry axis of the beam waist shape is along the cantilever beam direction.

Furthermore, the hollow groove plate is a right triangle, one right-angle side of the right triangle is along the direction of the cantilever beam, and the other right-angle side of the right triangle is perpendicular to the direction of the cantilever beam and is close to the free end of the cantilever beam.

Further, the hollow channel plate extends beyond the free end of the cantilever beam.

Furthermore, the cantilever beam is made of aluminum alloy, silicon, semiconductor materials and diamond.

Further, the material of the piezoelectric material block is piezoelectric ceramic or polyvinylidene fluoride.

Further, the liquid is ethanol.

Further, the magnetic particles are ferroferric oxide particles.

Further, the material of the hollow groove plate is copper.

The invention has the beneficial effects that: the invention provides a cantilever beam type magnetic field detection device based on magnetic particles. During application, under the action of a magnetic field to be detected, the magnetic particles are acted by the action of the magnetic field force, the magnetic particles move in the liquid, and the movement of the magnetic particles changes the overall mass distribution of the cantilever beam, so that the resonance frequency of the cantilever beam is changed, and magnetic field detection is realized by measuring the change of the resonance frequency. The invention has simple structure and low cost. In addition, because the inherent resonance frequency of the cantilever beam is very sensitive to the overall mass distribution of the cantilever beam, the invention has the advantage of high magnetic field detection sensitivity and has important application prospect in the field of magnetic field detection.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of an cantilever-type magnetic field detection device based on magnetic particles.

Fig. 2 is a schematic diagram of another cantilever-type magnetic field detection device based on magnetic particles.

Fig. 3 is a schematic diagram of another cantilever-type magnetic field detection device based on magnetic particles.

In the figure: 1. a vibration source; 2. a cantilever beam; 3. a block of piezoelectric material; 4. a hollow channel plate; 5. magnetic particles.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.