CN111537763A - Flow velocity detector and application method thereof - Google Patents

Abstract

The invention provides a flow velocity detector and a using method thereof.A fluid changes the relative position between two magnets and changes a magnetic field outside the flow velocity detector; the flow rate of the fluid is determined by detecting the magnetic field generated by the magnets in the fluid. On one hand, because the interaction between the magnetic field and the substance is weak, the measurement result is less influenced by the external environment, and therefore the measurement accuracy and sensitivity are high. On the other hand, the invention has simple information transmission path and high reliability. In addition, the invention only has devices such as a magnet, an elastic component and the like, does not have complicated electronic or optical elements and has simple structure.

Description

Flow velocity detector and application method thereof

Technical Field

The invention relates to the field of flow velocity detection, in particular to a flow velocity detector and a using method thereof.

Background

The flow rate refers to the distance that the fluid travels per unit time. Flow rate measurements are of great importance in engineering practice and in the knowledge of nature. In the prior art, the sensitivity and the accuracy for detecting the flow velocity of fluid in a pipeline deeply buried underground or the flow velocity of seawater in deep sea are low, and devices are complex.

Disclosure of Invention

To solve the above problems, the present invention provides a flow rate detector and a method for using the same.

The flow velocity detector comprises a wall, a first magnet, a second magnet, an elastic component, a hole and a stress part, wherein the first magnet is fixed on the wall, the second magnet is fixedly connected with the elastic component, the elastic component is fixedly connected on the wall, the wall is provided with the hole, and the stress part penetrates through the hole and is fixedly connected with the second magnet. When the flow velocity is measured, the fluid acts on the force-bearing part, so that the relative position between the first magnet and the second magnet is changed, the magnetic field outside the wall of the device is changed, and the flow velocity of the fluid is detected by detecting the magnetic field outside the wall of the device.

Further, the first magnet is fixed to an upper portion inside the wall, and the second magnet is restricted to a lower portion of the wall by the guide rail.

Furthermore, a groove is formed in the middle of the first magnet, and the size of the second magnet is smaller than that of the first magnet, so that the second magnetic field can enter the groove of the first magnetic field after the second magnet is stressed.

Further, the first magnet and the second magnet are arranged with opposite magnetic poles.

Further, the elastic member is a spring.

The use method of the flow velocity detector comprises the following steps:

firstly, placing the flow velocity detector in fluid, wherein the flow velocity detector excites a magnetic field outside the fluid; the magnetic field outside the flow rate probe will change compared to when not placed in the fluid;

secondly, fixing diamond particles in the fluid, wherein the diamond particles all contain nitrogen-vacancy color centers, irradiating the diamond particles by using excitation light with a preset wavelength, applying sweep frequency microwaves with a preset frequency range to the diamond particles by using a microwave guide wire, collecting fluorescence emitted by the nitrogen-vacancy color centers in the diamond particles through excitation, and determining a magnetic field at the position by analyzing the relation between fluorescence intensity and microwave frequency;

thirdly, measuring the relative position between the measured magnetic field and the flow velocity detector;

and fourthly, determining the flow velocity by analyzing the relative position relationship between the magnetic field and the point of the measuring magnetic field and the flow velocity detector.

The invention has the beneficial effects that: the invention provides a flow velocity detector and a using method thereof.A fluid changes the relative position between two magnets and changes a magnetic field outside the flow velocity detector; the flow rate of the fluid is determined by detecting the magnetic field generated by the magnets in the fluid. On one hand, because the interaction between the magnetic field and the substance is weak, when the flow velocity of fluid in deep sea or deep buried pipeline is detected, the action between the magnetic field generated by the magnet and the sea or soil is weak, the influence of the external environment on the measurement result is small, and the measurement accuracy and sensitivity are high. On the other hand, the magnetic field is generated by the magnetic field in the fluid, and the information propagation path is a one-way path from the inside of the fluid to the outside of the fluid. In the prior detection technology, a signal needs to be generated outside a fluid, the signal needs to be transmitted to a sensitive element in the fluid, the signal is transmitted outside the fluid after the sensitive element changes the signal, and the information transmission is a two-way path. Therefore, the invention has simple information transmission path and high reliability. In addition, the invention only has devices such as a magnet, an elastic component and the like, does not have complicated electronic or optical elements and has simple structure.

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

Drawings

FIG. 1 is a schematic view of a flow rate probe.

Fig. 2 is a schematic diagram showing a positional relationship between the first magnet and the second magnet.

In the figure: 1. a vessel wall; 2. a first magnet; 3. a second magnet; 4. an elastic member; 5. a hole; 6. a force-bearing portion.

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.

Examples

The invention provides a flow velocity detector and a using method thereof.

As shown in fig. 1, the flow rate detector comprises a wall 1, a first magnet 2, a second magnet 3, an elastic member 4, a hole 5, and a force-receiving portion 6, wherein the first magnet 2 is fixed on the upper portion of the wall 1, the second magnet 3 is fixedly connected to the elastic member 4, the elastic member 4 is fixedly connected to the wall 1, and the second magnet 3 is limited on the lower portion of the wall 1 by a guide rail, so as to prevent the first magnet 2 and the second magnet 3 from moving up and down. The wall 1 is provided with a hole 5, and the stress part 6 penetrates through the hole 5 and is fixedly connected with the second magnet 3. When the flow velocity is measured, the fluid acts on the force-receiving part 6, so that the relative position between the first magnet 2 and the second magnet 3 is changed, the magnetic field outside the wall 1 is changed, and the flow velocity of the fluid is detected by detecting the magnetic field outside the wall 1. In practical applications, the first magnet 2 may be disposed at a middle position of the upper portion of the wall 1, or may be disposed at a side of the wall 1 away from the hole 5, which is determined according to the flow rate to be measured. If a large flow rate is to be measured, the first magnet 2 is arranged on the side of the wall 1 remote from the hole 5. Further, the position of the first magnet 2 is movable to accommodate the need for different flow rate measurements.

Further, as shown in fig. 2, the first magnet 2 is provided at a middle portion thereof with a recess, and the second magnet 3 is smaller in size than the recess of the first magnet 2 so that an upper portion of the second magnet 3 can pass through the recess. In this way, the external magnetic field of the flow rate probe is more sensitive to the relative position of the first magnet 2 and the second magnet 3, resulting in a more sensitive measurement of the flow rate in the end.

Further, the first magnet 2 is disposed opposite to the second magnet 3 in opposite magnetic poles so as to generate a stronger magnetic field outside the flow rate sensor.

Further, the elastic member 4 is a spring, and the elastic member 4 may be a rust-proof rubber material.

The use method of the flow velocity detector comprises the following steps:

firstly, placing a flow velocity detector in fluid, wherein the flow velocity detector excites a magnetic field outside the fluid; the magnetic field outside the flow rate probe will change compared to when not placed in the fluid.

Secondly, fixing diamond particles in the fluid, wherein the diamond particles all contain nitrogen-vacancy color centers, irradiating the diamond particles by using excitation light with a preset wavelength, applying sweep frequency microwaves with a preset frequency range to the diamond particles by using a microwave guide wire, collecting fluorescence emitted by the nitrogen-vacancy color centers in the diamond particles through excitation, splitting the energy levels of the diamond nitrogen-vacancy color centers under the combined action of a magnetic field and the microwaves, and determining the magnetic field at the position by analyzing the relation between the fluorescence intensity and the microwave frequency; the wavelength of the preset laser is 532 nanometers, and the sweep frequency range of the preset microwave is 2.8GHz-2.94 GHz.

Thirdly, measuring the relative position between the measured magnetic field and the flow velocity detector; the strength of the measured magnetic field depends on the relative position.

And fourthly, determining the flow velocity by analyzing the relative position relationship between the magnetic field and the point of the measuring magnetic field and the flow velocity detector.

The invention provides a flow velocity detector and a using method thereof.A fluid changes the relative position between a first magnet 2 and a second magnet 3 and changes the magnetic field outside the flow velocity detector; the flow rate of the fluid is determined by detecting the magnetic field generated by the magnets in the fluid. On one hand, because the interaction between the magnetic field and the substance is weak, when the flow velocity of fluid in deep sea or deep buried pipeline is detected, the action between the magnetic field generated by the magnet and the sea or soil is weak, the influence of the external environment on the measurement result is small, and the measurement accuracy and sensitivity are high. On the other hand, the magnetic field is generated by a magnet in the fluid, and the information is transmitted in a one-way path from the inside of the fluid to the outside of the fluid. In the prior detection technology, a signal is required to be generated outside a fluid, the signal is transmitted to a sensitive element in the fluid, the signal is transmitted outside the fluid after the sensitive element changes the signal, and the information transmission is a two-way path. The invention has simple information transmission path and high reliability. In addition, the invention only has the devices such as the magnet, the elastic component 4 and the like, does not have complicated electronic or optical elements, and has simple structure and stable performance. More importantly, the invention uses the diamond particle nitrogen-vacancy color center magnetism measuring technology for the flow velocity of fluid in deep sea or deep buried underground pipelines, the distance between the measured position and the sea level or the bottom surface is long, the environment is complex, the invention combines the high sensitivity of the magnetism measuring technology with the actually required long distance and high environment complexity, and the defects of low accuracy, low sensitivity and the like in the prior art are overcome.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (6)

1. A flow velocity detector is characterized by comprising a wall, a first magnet, a second magnet, an elastic component, a hole and a stress part, wherein the first magnet is fixed on the wall, the second magnet is fixedly connected with the elastic component, the elastic component is fixedly connected on the wall, the hole is arranged on the wall, and the stress part penetrates through the hole and is fixedly connected with the second magnet;

when the flow velocity is measured, the fluid acts on the force-bearing part, so that the relative position between the first magnet and the second magnet is changed, the magnetic field outside the wall of the container is changed, and the flow velocity of the fluid is detected by detecting the magnetic field outside the wall of the container.

2. The flow rate probe of claim 1, wherein: the first magnet is fixed on the upper part in the wall, and the second magnet is limited on the lower part of the wall through a guide rail.

3. The flow rate probe of claim 2, wherein: the middle part of first magnet is equipped with the recess, second magnet size is less than the recess of first magnet.

4. A flow rate probe according to any one of claims 1 to 3, wherein: the first magnet and the second magnet are arranged in a manner that opposite magnetic poles are opposite to each other.

5. The flow rate probe of claim 4, wherein: the elastic component is a spring.

6. Use of a flow rate probe according to any of claims 1 to 5, wherein: the method comprises the following steps:

firstly, placing the flow velocity detector in fluid, wherein the flow velocity detector excites a magnetic field outside the fluid;

secondly, fixing diamond particles in the fluid, wherein the diamond particles all contain nitrogen-vacancy color centers, irradiating the diamond particles by using excitation light with a preset wavelength, applying sweep frequency microwaves with a preset frequency range to the diamond particles by using a microwave guide wire, collecting fluorescence emitted by the nitrogen-vacancy color centers in the diamond particles through excitation, and determining a magnetic field at the position by analyzing the relation between fluorescence intensity and microwave frequency;

thirdly, measuring the relative position between the measured magnetic field and the flow velocity detector;

and fourthly, determining the flow velocity by analyzing the relative position relationship between the magnetic field and the point of the measuring magnetic field and the flow velocity detector.

Images