CN113340382B

CN113340382B - Magnetostrictive liquid level meter with adjustable reflection echo and liquid level detection method

Info

Publication number: CN113340382B
Application number: CN202110584285.8A
Authority: CN
Inventors: 呼秀山; 夏阳
Original assignee: Beijing Ruida Instrument Co ltd
Current assignee: Yimu Technology Beijing Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2023-05-26
Anticipated expiration: 2041-05-27
Also published as: CN113340382A

Abstract

The present disclosure provides a reflection echo adjustable magnetostrictive level gauge, comprising: a float including a magnetic portion; a waveguide wire to which an electric current is applied such that the waveguide wire generates a torsional wave pulse at the float position; the vibration sensor is used for detecting torsional wave pulses generated by the waveguide wire; the waveform sampling module is used for collecting torsional wave pulses detected by the vibration sensor; and the amplitude of the torsional wave pulse acquired by the waveform sampling module is in a preset range by changing the current in the waveguide wire and/or changing the waveform of the torsional wave pulse input by the vibration sensor to the waveform sampling module. The disclosure also provides a liquid level detection method.

Description

Magnetostrictive liquid level meter with adjustable reflection echo and liquid level detection method

Technical Field

The present disclosure relates to a magnetostrictive liquid level gauge with adjustable reflection echo and a liquid level detection method.

Background

In operation of the sensor of the magnetostrictive level gauge, the circuit portion of the sensor will excite a pulsed current in the waveguide wire that, when propagated along the waveguide wire, will generate a pulsed current magnetic field around the waveguide wire. A float is arranged outside the sensor measuring rod of the magnetostrictive liquid level meter, and the float can move up and down along the measuring rod along with the change of the liquid level. Inside the float there is a set of permanent magnetic rings. When the pulsed current magnetic field meets the magnetic ring magnetic field generated by the floater, the magnetic field around the floater changes so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse (mechanical vibration wave) at the position of the floater, and the pulse (mechanical vibration wave) is transmitted back along the waveguide wire at a fixed speed and detected by a detection mechanism. The position of the float, i.e. the position of the liquid surface, can be determined accurately by measuring the time difference between the pulse current and the received torsional wave detected by the detection means.

However, when the magnetostrictive level gauge in the prior art is used, when the liquid level is low, the torsional wave pulse is distorted, so that the measurement of the magnetostrictive level gauge is inaccurate.

Disclosure of Invention

In order to solve one of the above technical problems, the present disclosure provides a magnetostrictive liquid level meter with adjustable reflection echo and a liquid level detection method.

According to one aspect of the present disclosure, there is provided a magnetostrictive level gauge with adjustable reflection echo, comprising:

a float including a magnetic portion;

a waveguide wire to which an electric current is applied such that the waveguide wire generates a torsional wave pulse at the float position;

the vibration sensor is used for detecting torsional wave pulses generated by the waveguide wire; and

the waveform sampling module is used for collecting torsional wave pulses detected by the vibration sensor;

and the amplitude of the torsional wave pulse acquired by the waveform sampling module is in a preset range by changing the current in the waveguide wire and/or changing the waveform of the torsional wave pulse input by the vibration sensor to the waveform sampling module.

A magnetostrictive level gauge with adjustable reflection echo according to at least one embodiment of the present disclosure, further comprising:

and one end of the waveguide wire is connected with the controllable loop current generator, and the other end of the waveguide wire is connected with the controllable loop current generator through a loop wire so as to provide different currents for the waveguide wire through the controllable loop current generator.

A reflection echo adjustable magnetostrictive level gauge according to at least one embodiment of the present disclosure increases current supplied to the waveguide wire when a liquid level detected by the reflection echo adjustable magnetostrictive level gauge is decreasing; when the liquid level detected by the magnetostrictive liquid level meter with adjustable reflection echo rises, the current supplied to the waveguide wire is reduced.

A reflective echo adjustable magnetostrictive level gauge according to at least one embodiment of the present disclosure varies the current supplied to a waveguide wire by varying the voltage supplied to the waveguide wire.

A reflection echo adjustable magnetostrictive level gauge according to at least one embodiment of the present disclosure, the controllable loop current generator comprising:

the controllable voltage energy storage module is used for providing electric energy with different voltages; and

the controllable voltage energy storage module is connected with the waveguide wire through the switch module;

the controllable voltage energy storage module is controlled to generate electric energy with a preset voltage value, and when the switch module is opened, the electric energy with the preset voltage value is provided for the waveguide wire.

A reflection echo adjustable magnetostrictive level gauge according to at least one embodiment of the present disclosure, the controllable voltage energy storage module comprising:

the controllable voltage source is used for providing electric energy with different voltages; and

one end of the charging capacitor is connected to the output terminal of the controllable voltage source, and the other end of the charging capacitor is grounded;

and the output terminal of the controllable voltage source is connected with the switch module.

A reflection echo adjustable magnetostrictive level gauge according to at least one embodiment of the present disclosure, the controllable voltage energy storage module further comprising:

the voltage measurement module is used for detecting the voltage of the output terminal of the controllable voltage source and transmitting the voltage signal of the output terminal of the controllable voltage source detected by the voltage measurement module to the operation control module.

the vibration sensor is connected with the waveform sampling module through the controllable signal amplification module;

the amplification factor of the controllable signal amplification module is adjustable, and the amplitude of the torsional wave pulse acquired by the waveform sampling module is in a preset range by adjusting the amplification factor of the controllable signal amplification module.

the operation control module is connected with the waveform sampling module to obtain the position of the floater relative to the waveguide wire according to the time value of the torsional wave pulse acquired by the waveform sampling module.

The operation control module is also connected with a controllable loop current generator to control the current value provided by the controllable loop current generator to the waveguide wire.

The operation control module is further used for controlling the time value of the controllable loop current generator for providing current to the waveguide wire according to the magnetostrictive liquid level meter with the adjustable reflection echo, and the operation control module obtains the position of the floater relative to the waveguide wire according to the difference value between the time value of the controllable loop current generator for providing current to the waveguide wire and the time value of the torsional wave pulse acquired by the waveform sampling module.

According to another aspect of the present disclosure, there is provided a liquid level detection method for implementing liquid level detection by using the above-mentioned magnetostrictive liquid level gauge with adjustable reflection echo, the liquid level detection method including:

applying an electrical current to the waveguide wire such that the waveguide wire produces a torsional wave pulse at the float position;

detecting torsional wave pulses generated by the waveguide wire through a vibration sensor;

collecting torsional wave pulses detected by the vibration sensor through a waveform sampling module; and

the operation control module obtains the position of the floater relative to the waveguide wire according to the time value of the torsional wave pulse acquired by the waveform sampling module, and obtains the first position of the liquid level according to the position of the floater;

According to the liquid level detection method of at least one embodiment of the present disclosure, when the liquid level detected by the magnetostrictive liquid level meter with adjustable reflection echo is decreasing, the current supplied to the waveguide wire is increased; when the liquid level detected by the magnetostrictive liquid level meter with adjustable reflection echo rises, the current supplied to the waveguide wire is reduced.

According to the liquid level detection method of at least one embodiment of the present disclosure, the amplitude of the torsional wave pulse collected by the waveform sampling module is within a preset range by adjusting the amplification factor of the controllable signal amplification module.

applying a first current to a waveguide wire to cause the waveguide wire to generate a first torsional wave pulse at the float position;

detecting a first torsional wave pulse generated by the waveguide wire by a vibration sensor;

the method comprises the steps that a waveform sampling module collects first torsional wave pulses which are detected by a vibration sensor and processed by a first amplification factor;

the operation control module obtains a first position of the floater relative to the waveguide wire according to the time value of the first torsional wave pulse acquired by the waveform sampling module, and obtains a first position of the liquid level according to the first position of the floater;

determining a distance between the float and the vibration sensor according to the first position of the liquid level;

determining a second current value provided for the waveguide wire according to the distance between the floater and the vibration sensor, and/or determining a second amplification factor of the controllable signal amplification module, and enabling the amplitude of the torsional wave pulse acquired by the waveform sampling module to be within a preset range; and

applying a second current to the waveguide wire and setting an amplification factor of the controllable signal amplification module to a second amplification factor; and detecting the position of the float again to obtain a second position of the float, and obtaining the accurate position of the liquid level according to the second position of the float.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural view of a reflection echo tunable magnetostrictive level gauge according to one embodiment of the present disclosure.

Fig. 2 is a schematic diagram of a controllable loop current generator according to one embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a controllable loop current generator according to one embodiment of the present disclosure.

Fig. 4 is a flow chart of a liquid level detection method according to one embodiment of the present disclosure.

Fig. 5 is a flow chart of a liquid level detection method according to another embodiment of the present disclosure.

The reference numerals in the drawings specifically are:

magnetostrictive liquid level meter with adjustable 100 reflection echo

110 float

120 waveguide wire

130 vibration sensor

140 waveform sampling module

150 controllable loop current generator

151 controllable voltage energy storage module

1511 controllable voltage source

1512 charging capacitor

1513 voltage measurement module

152 switch module

160-controllable signal amplifying module

170, an operation control module.

Detailed Description

The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.

In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The technical aspects of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the exemplary implementations/embodiments shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Thus, unless otherwise indicated, features of the various implementations/embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concepts of the present disclosure.

The use of cross-hatching and/or shading in the drawings is typically used to clarify the boundaries between adjacent components. As such, the presence or absence of cross-hatching or shading does not convey or represent any preference or requirement for a particular material, material property, dimension, proportion, commonality between illustrated components, and/or any other characteristic, attribute, property, etc. of a component, unless indicated. In addition, in the drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. While the exemplary embodiments may be variously implemented, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in reverse order from that described. Moreover, like reference numerals designate like parts.

When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. For this reason, the term "connected" may refer to physical connections, electrical connections, and the like, with or without intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "under … …," under … …, "" under … …, "" lower, "" above … …, "" upper, "" above … …, "" higher "and" side (e.g., as in "sidewall"), etc., to describe one component's relationship to another (other) component as illustrated in the figures. In addition to the orientations depicted in the drawings, the spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below" … … can encompass both an orientation of "above" and "below". Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising," and variations thereof, are used in the present specification, the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof is described, but the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximation terms and not as degree terms, and as such, are used to explain the inherent deviations of measured, calculated, and/or provided values that would be recognized by one of ordinary skill in the art.

The present disclosure provides a reflection echo adjustable magnetostrictive level gauge 100 comprising:

a float 110, the float 110 comprising a magnetic part for generating a fixed magnetic field.

A waveguide wire 120, the waveguide wire 120 being energized with an electrical current such that the waveguide wire 120 produces a torsional wave pulse at the float 110 location;

a vibration sensor 130, wherein the vibration sensor 130 is used for detecting torsional wave pulses generated by the waveguide wire 120; and

a waveform sampling module 140, wherein the waveform sampling module 140 is configured to collect torsional wave pulses detected by the vibration sensor 130;

the amplitude of the torsional wave pulse collected by the waveform sampling module 140 is within a preset range by changing the current in the waveguide wire 120 and/or changing the waveform of the torsional wave pulse input to the waveform sampling module 140 by the vibration sensor 130.

The reflection echo adjustable magnetostrictive liquid level meter 100 of the present disclosure enables the amplitudes of echo signals (torsional wave pulses) at different distances to be kept substantially consistent through the current in the adjustable waveguide wire 120 and/or the waveform of the adjustable torsional wave pulse, so that the degree of attenuation of the signals along with the distance amplitude can be reduced, thereby improving the measurement accuracy, improving the measurement reliability, and simultaneously increasing the range of the reflection echo adjustable magnetostrictive liquid level meter 100.

In the present disclosure, the float 110 may be made of a lightweight material, such as foam; the magnetic part may be a permanent magnet, and the magnetic part is disposed inside the float 110.

Similar to the magnetostrictive level gauge in the prior art, a through hole exists in the middle of the float 110, and the waveguide wire 120 is positioned in the through hole, and enables the float 110 to move along the length direction of the waveguide wire 120.

In the present disclosure, the magnetostrictive level gauge 100 with adjustable reflection echo further includes:

and a controllable loop current generator 150, wherein one end of the waveguide wire 120 is connected to the controllable loop current generator 150, and the other end of the waveguide wire 120 is connected to the controllable loop current generator 150 through a loop wire, so as to provide different currents to the waveguide wire 120 through the controllable loop current generator 150.

For example, one end of the waveguide wire 120 is connected to the positive terminal of the controllable loop current generator 150, and the other end of the waveguide wire 120 is connected to the negative terminal of the controllable loop current generator 150 through a loop wire, so that the controllable loop current generator 150 and the waveguide wire 120 form a circuit connection.

In an alternative embodiment of the present disclosure, the current provided to the waveguide wire 120 is increased when the level detected by the reflection echo adjustable magnetostrictive level gauge 100 is decreasing; when the liquid level detected by the reflection echo adjustable magnetostrictive level gauge 100 rises, the current supplied to the waveguide wire 120 is reduced.

Wherein the drop in the liquid level means that the distance between the vibration sensor 130 and the float 110 becomes large; the drop in the liquid level means that the distance between the vibration sensor 130 and the float 110 decreases.

In accordance with at least one embodiment of the present disclosure, the current provided to the waveguide wire 120 is varied by varying the voltage provided to the waveguide wire 120.

In the present disclosure, as shown in fig. 2, preferably, the controllable loop current generator 150 includes:

the controllable voltage energy storage module 151, the controllable voltage energy storage module 151 is used for providing electric energy with different voltages; and

the switch module 152, the controllable voltage energy storage module 151 is connected to the waveguide wire 120 through the switch module 152;

wherein the controllable voltage energy storage module 151 is controlled to generate electric energy with a preset voltage value, and when the switch module 152 is opened, the electric energy with the preset voltage value is provided to the waveguide wire 120.

More preferably, as shown in fig. 3, the controllable voltage energy storage module 151 includes:

a controllable voltage source 1511, the controllable voltage source 1511 for providing electrical energy at different voltages; and

a charging capacitor 1512, one end of the charging capacitor 1512 is connected to the output terminal of the controllable voltage source 1511, and the other end of the charging capacitor 1512 is grounded;

wherein an output terminal of the controllable voltage source 1511 is connected with the switch module 152.

The controllable voltage energy storage module 151 further includes:

a voltage measurement module 1513, where the voltage measurement module 1513 is configured to detect a voltage of the output terminal of the controllable voltage source 1511, and transmit a voltage signal of the output terminal of the controllable voltage source 1511 detected by the voltage measurement module 1513 to the operation control module 170; the operation control module 170 further controls the controllable voltage source 1511 to generate electric energy with a preset voltage value according to the voltage signal of the output terminal detected by the voltage measurement module 1513.

In the present disclosure, the operation control module is further connected to the switch module 152, so as to control the on and off of the switch module 152 through the operation control module.

In accordance with at least one embodiment of the present disclosure, the reflection echo adjustable magnetostrictive level gauge 100 further comprises:

a controllable signal amplifying module 160, wherein the vibration sensor 130 is connected to the waveform sampling module 140 through the controllable signal amplifying module 160;

the amplification factor of the controllable signal amplification module 160 is adjustable, and the amplitude of the torsional wave pulse collected by the waveform sampling module 140 is within a preset range by adjusting the amplification factor of the controllable signal amplification module 160.

That is, the adjustment of the amplitude of the torsional wave pulse (echo signal) of the present disclosure may also be accomplished by the controllable signal amplification module 160; the controllable signal amplifying module 160 may be implemented by a gain-adjustable signal amplifying circuit.

Preferably, the amplification factor of the controllable signal amplification module 160 is continuously adjustable; of course, the amplification factor of the controllable signal amplification module 160 may also be discontinuously adjusted. Moreover, when the amplification factor of the controllable signal amplification module 160 is discontinuously adjusted, the controllable signal amplification module 160 alone has poor consistency in the amplitude of the echo signal, and needs to be used in combination with the controllable loop current generator 150.

In an alternative embodiment of the present disclosure, the magnetostrictive level gauge 100 with adjustable reflection echo further comprises:

the operation control module 170 is connected to the waveform sampling module 140, so as to obtain the position of the float 110 relative to the waveguide wire 120 according to the time value of the torsional wave pulse acquired by the waveform sampling module 140.

More preferably, the arithmetic control module 170 is further connected to the controllable loop current generator 150 to control a current value provided by the controllable loop current generator 150 to the waveguide wire 120.

In this disclosure, the operation control module 170 is further connected to the controllable loop current generator 150 to control a time value of the controllable loop current generator 150 supplying current to the waveguide wire 120, and the operation control module 170 obtains the position of the float 110 relative to the waveguide wire 120 according to a difference between the time value of the controllable loop current generator 150 supplying current to the waveguide wire 120 and the time value of the torsional wave pulse acquired by the waveform sampling module 140.

In the present disclosure, the magnetostrictive level gauge 100 with adjustable reflection echo further includes: the waveguide wire is arranged in the outer sleeve along the length direction of the outer sleeve, and the floater is slidably arranged in the outer sleeve and is positioned outside the outer sleeve.

According to another aspect of the present disclosure, there is provided a liquid level detection method for implementing liquid level detection by using the above-mentioned magnetostrictive liquid level gauge 100 with adjustable reflection echo, the liquid level detection method including:

202. applying an electrical current to the waveguide wire 120 such that the waveguide wire 120 produces a torsional wave pulse at the location of the float 110;

204. detecting torsional wave pulses generated by the waveguide wire 120 by a vibration sensor 130;

206. collecting torsional wave pulses detected by the vibration sensor 130 by a waveform sampling module 140; and

208. the operation control module 170 obtains the position of the float 110 relative to the waveguide wire 120 according to the time value of the torsional wave pulse acquired by the waveform sampling module 140, and obtains the position of the liquid level according to the position of the float 110;

In the present disclosure, the amplitude of the torsional wave pulse collected by the waveform sampling module 140 is within a preset range by adjusting the amplification factor of the controllable signal amplifying module 160.

In the present disclosure, the above-described first position may be taken as a position preliminary measurement result, and accurate measurement of the position of the float is achieved based on the position preliminary measurement result.

Specifically, as shown in fig. 5, according to another aspect of the present disclosure, there is provided a liquid level detection method for implementing liquid level detection by using the above-mentioned magnetostrictive liquid level meter 100 with adjustable reflection echo, the liquid level detection method including:

302. applying a first current to the waveguide wire 120 such that the waveguide wire 120 generates a first torsional wave pulse at the location of the float 110;

304. detecting a first torsional wave pulse generated by the waveguide wire 120 by a vibration sensor 130;

306. collecting first torsional wave pulses processed by the first torsional wave pulses detected by the vibration sensor 130 with a first amplification factor through a waveform sampling module 140;

308. the operation control module 170 obtains a first position of the float 110 relative to the waveguide wire 120 according to the time value of the first torsional wave pulse acquired by the waveform sampling module 140, and obtains a first position of the liquid level according to the first position of the float 110;

310. determining a distance between the float 110 and the vibration sensor 130 according to the first position of the liquid level;

312. determining a second current value provided to the waveguide wire 120 according to the distance between the float 110 and the vibration sensor 130, and/or determining a second amplification factor of the controllable signal amplification module 160, and making the amplitude of the torsional wave pulse acquired by the waveform sampling module 140 be within a preset range; and

314. applying a second current to the waveguide wire 120 and setting the amplification factor of the controllable signal amplification module 160 to a second amplification factor; and detecting the position of the float again to obtain a second position of the float, and obtaining the accurate position of the liquid level according to the second position of the float.

In this disclosure, the first current value and the second current value may be the same or different.

When the amplification factor is greater than 1, the controllable signal amplification module amplifies torsional wave pulses; and when the amplification factor is smaller than 1, the controllable signal amplification module reduces the torsional wave pulse.

In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the present application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.

Claims

1. A magnetostrictive level gauge with adjustable reflection echo, comprising:

a float including a magnetic portion;

and the amplitude of the torsional wave pulse acquired by the waveform sampling module is in a preset range by changing the current in the waveguide wire and/or changing the waveform of the torsional wave pulse input by the vibration sensor to the waveform sampling module, so that the amplitudes of the torsional wave pulses at different distances are basically kept consistent.

2. The reflection-echo adjustable magnetostrictive level gauge according to claim 1, further comprising:

3. The magnetostrictive level gauge of claim 2, wherein the current provided to the waveguide wire is increased when the level detected by the magnetostrictive level gauge is decreasing; when the liquid level detected by the magnetostrictive liquid level meter with adjustable reflection echo rises, the current supplied to the waveguide wire is reduced.

4. The reflection-echo adjustable magnetostrictive level gauge according to claim 2, wherein the current supplied to the waveguide filament is varied by varying the voltage supplied to the waveguide filament.

5. The reflection-echo adjustable magnetostrictive level gauge of claim 2, wherein the controllable loop current generator comprises:

6. The reflection-echo adjustable magnetostrictive level gauge according to claim 5, wherein the controllable voltage energy storage module comprises:

7. The reflection-echo adjustable magnetostrictive level gauge according to claim 6, wherein the controllable voltage energy storage module further comprises:

8. The reflection-echo adjustable magnetostrictive level gauge according to claim 1, further comprising:

9. The reflection-echo adjustable magnetostrictive level gauge according to claim 1, further comprising:

10. The magnetostrictive level meter of claim 9, wherein the arithmetic control module is further coupled to a controllable loop current generator to control the current value provided by the controllable loop current generator to the waveguide filament.

11. The magnetostrictive level meter of claim 10, wherein the operational control module is further configured to control a time value of the controllable loop current generator providing current to the waveguide filament, and wherein the operational control module obtains the position of the float relative to the waveguide filament based on a difference between the time value of the controllable loop current generator providing current to the waveguide filament and the time value of the torsional wave pulse acquired by the waveform sampling module.

12. A method of liquid level detection using a magnetostrictive liquid level gauge with adjustable reflected echo according to any one of claims 1-11, comprising:

the operation control module obtains the position of the floater relative to the waveguide wire according to the time value of the torsional wave pulse acquired by the waveform sampling module, and obtains the position of the liquid level according to the position of the floater;

13. The liquid level detection method as claimed in claim 12, wherein when the liquid level detected by the reflection echo adjustable magnetostrictive liquid level meter is decreasing, the current supplied to the waveguide wire is increased; when the liquid level detected by the magnetostrictive liquid level meter with adjustable reflection echo rises, the current supplied to the waveguide wire is reduced.

14. The method of claim 12, wherein the amplitude of the torsional pulse collected by the waveform sampling module is within a predetermined range by adjusting the amplification factor of the controllable signal amplification module.

15. A method of liquid level detection using a magnetostrictive liquid level gauge with adjustable reflected echo according to any one of claims 1-11, comprising: