CN215639683U - Explosion-proof magnetostrictive liquid level sensor - Google Patents
Explosion-proof magnetostrictive liquid level sensor Download PDFInfo
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- CN215639683U CN215639683U CN202122319783.8U CN202122319783U CN215639683U CN 215639683 U CN215639683 U CN 215639683U CN 202122319783 U CN202122319783 U CN 202122319783U CN 215639683 U CN215639683 U CN 215639683U
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Abstract
The utility model belongs to the technical field of displacement sensors, and particularly relates to an explosion-proof magnetostrictive liquid level sensor which comprises a sensor head, wherein the end part of the sensor head is fixedly connected with a detection rod, the surface of the detection rod is movably connected with a movable floater, and the end part of the detection rod is provided with a limiting component; according to the magnetostrictive inverse effect, the magnetic flux in a receiving coil of a wound strip material can be changed, so that induced electromotive force can be generated in the receiving coil, the generated induced electromotive force is converted into electric pulse which can be identified by a timer through filtering and amplifying processing of a conditioning circuit, then the position of a floater is calculated by a counter through calculating the time difference t between the generation of excitation pulse and the reception of pulse, so that the liquid level of the current detected body is obtained, and meanwhile, the phenomenon that the end part of a magnetostrictive displacement sensor is not firmly fixed in an oil cylinder in the using process is avoided.
Description
Technical Field
The utility model belongs to the technical field of displacement sensors, and particularly relates to an explosion-proof magnetostrictive liquid level sensor.
Background
The magnetostrictive displacement sensor is a non-contact absolute displacement sensor for realizing displacement measurement by utilizing the magnetostrictive effect and the inverse effect of a magnetostrictive material, has the advantages of non-contact, high precision, good repeatability, reliable stability, strong environmental adaptability, moderate cost and the like, is widely applied to various tank storage liquid level measurement systems in the industries of petroleum, chemical engineering, water conservancy, beverages, aviation, ships and the like, and is also widely applied to displacement measurement of machine tools, hydraulic control and the like; however, the magnetostrictive displacement sensor has high cost and high power consumption in the use process, and the end part of the magnetostrictive displacement sensor is easily fixed in the oil cylinder in the use process.
For this reason, an explosion-proof magnetostrictive liquid level sensor is designed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides an explosion-proof magnetostrictive liquid level sensor which has the characteristics of low cost, low power consumption and pulse quality.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an explosion-proof magnetostrictive liquid level sensor, includes the sensor head, the tip fixedly connected with gauge rod of sensor head, the surperficial swing joint of gauge rod has movable float, the tip of gauge rod is provided with spacing subassembly.
Preferably, the limiting assembly comprises a limiting block, a threaded column and a threaded hole, the limiting block is fixedly connected to one end, away from the head of the sensor, of the detection rod, the threaded hole is formed in the end portion of the limiting block, and the threaded column is in threaded connection with the inner wall surface of the threaded hole.
Preferably, the explosion-proof magnetostrictive liquid level sensor comprises a waveguide wire, a return lead, a protective sleeve and a damping element at the tail end.
Preferably, as an explosion-proof magnetostrictive liquid level sensor according to the utility model, the movable float contains a permanent magnet.
Compared with the prior art, the utility model has the beneficial effects that: the wave guide wire and the receiving transmission belt in the magnetostrictive liquid level sensor are made of magnetostrictive materials, one end of the wave guide wire is applied with an excitation pulse, the pulse is transmitted forwards along the wave guide wire, according to the electromagnetic field conversion theory, an annular magnetic field H is transmitted forwards along with the excitation pulse at the light speed, when the annular magnetic field meets a longitudinal magnetic field generated by a permanent magnet in a floater, the wave guide wire is twisted and generates a torsional wave, the torsional wave is transmitted to two ends along the wave guide wire at a constant speed, the forward torsional wave is absorbed by damping at one end of the wave guide wire continuously, the backward transmitted torsional wave is transmitted to a receiving belt material, according to the magnetostrictive reverse effect, the magnetic flux in a receiving coil of the winding belt material is changed, so that induced electromotive force can be generated in the receiving coil, and then the generated induced electromotive force is converted into an electric pulse which can be identified by a timer through filtering and amplifying processing of a conditioning circuit, then the position of the floater is calculated by a counter through calculating the time difference t between the occurrence of the excitation pulse and the receipt of the pulse, so that the liquid level of the current measured body is obtained, and the phenomenon that the end part of the magnetostrictive displacement sensor is not firmly fixed in a cylinder in the use process is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the principles of the present invention;
FIG. 3 is a schematic block diagram of a system of the present invention;
FIG. 4 is a partial front sectional view of the present invention;
in the figure:
1. a sensor head; 2. a probe rod; 3. a movable float; 4. a limiting component; 41. a limiting block; 42. a threaded post; 43. a threaded bore.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1;
an explosion-proof magnetostrictive liquid level sensor comprises a sensor head 1.
In this embodiment: the magnetostrictive displacement sensor is a non-contact absolute displacement sensor for realizing displacement measurement by utilizing the magnetostrictive effect and the inverse effect of a magnetostrictive material, has the advantages of non-contact, high precision, good repeatability, reliable stability, strong environment adaptability, proper cost and the like, is widely applied to various tank storage liquid level measurement systems in the industries of petroleum, chemical engineering, water conservancy, beverages, aviation, ships and the like, and is also widely applied to displacement measurement of machine tools, hydraulic control and the like, so that principle analysis and realization optimization are carried out on key technologies used in the sensor on the basis, and in the design of an excitation pulse generating device, a realization scheme with low cost and low power consumption and pulse quality is provided.
Further, the method comprises the following steps:
as shown in fig. 1 to 4:
with the above in mind: the utility model provides an explosion-proof magnetostrictive liquid level sensor, including sensor head 1, the tip fixedly connected with gauge rod 2 of sensor head 1, the surperficial swing joint of gauge rod 2 has movable float 3, the inside of sensor head 1 is provided with signal generation device, the control accounting device of echo detection device and system, gauge rod 2 is by the waveguide silk, return wire and the protective case that wants and terminal damping original paper are constituteed, wherein protective case is two-layer insulation support, the damping original paper is at the end of waveguide silk, contain permanent magnet in the activity float 3, can freely slide on the gauge rod, the tip of gauge rod 2 is provided with spacing subassembly 4.
In this embodiment: the wave guide wire and the receiving transmission belt in the magnetostrictive liquid level sensor are made of magnetostrictive materials, one end of the wave guide wire is applied with an excitation pulse, the pulse is transmitted forwards along the wave guide wire, according to the electromagnetic field conversion theory, an annular magnetic field H is transmitted forwards along with the excitation pulse at the light speed, when the annular magnetic field meets a longitudinal magnetic field generated by a permanent magnet in a floater, the wave guide wire is twisted and generates a torsional wave, the torsional wave is transmitted to two ends along the wave guide wire at a constant speed, the forward torsional wave is absorbed by damping at one end of the wave guide wire continuously, the backward transmitted torsional wave is transmitted to a receiving belt material, according to the magnetostrictive reverse effect, the magnetic flux in a receiving coil of the winding belt material is changed, so that induced electromotive force can be generated in the receiving coil, and then the generated induced electromotive force is converted into an electric pulse which can be identified by a timer through filtering and amplifying processing of a conditioning circuit, then the position of the floater is calculated by a counter through calculating the time difference t between the occurrence of the excitation pulse and the receiving of the pulse, so that the liquid level of the current measured body is obtained;
as shown in fig. 3, a schematic block diagram of a magnetostrictive displacement sensor system. The pulse generating circuit is controlled by a singlechip (MCU) main controller to generate excitation pulse, a timing circuit starts to work, when an excitation pulse signal meets a movable floater (a permanent magnet), a magnetostrictive effect can be generated on a waveguide wire to generate torsional waves, when the torsional waves return to a receiving device, the receiving device converts the torsional waves into electric signals to induce induced electromotive force according to the magnetostrictive reverse effect, a better pulse signal obtained through the processing of a signal conditioning circuit is sent to the timing circuit and the singlechip (MCU), the timing circuit stops timing and sends numerical values to the MCU, the MCU obtains the accurate liquid level of the liquid to be measured through calculation, the accurate liquid level is displayed through an LCD and is sent to an upper computer or other equipment through 4-20mA and other communication modes.
Further, the method comprises the following steps:
in an alternative embodiment, the limiting component 4 includes a limiting block 41, a threaded post 42 and a threaded hole 43, the limiting block 41 is fixedly connected to one end of the detecting rod 2 far away from the sensor head 1, the threaded hole 43 is opened at the end of the limiting block 41, and the threaded post 42 is screwed on the inner wall surface of the threaded hole 43.
In this embodiment: the thread column 42 is fixedly connected to the inner wall surface of the oil cylinder, a mounting groove is formed in the surface of the oil cylinder, which is close to the position right above the thread column 42, when the magnetostrictive displacement sensor needs to be mounted, the magnetostrictive displacement sensor is inserted along the inner wall of the mounting groove, the thread column 42 is attached to the inner wall surface of the threaded hole 43, the oil cylinder magnetostrictive displacement sensor is rotated, the thread column 42 is rotated on the inner wall surface of the threaded hole 43 until the end portion of the thread column 42 is attached to the inner wall surface of the threaded hole 43, the oil cylinder magnetostrictive displacement sensor is mounted at the moment, and the phenomenon that the end portion of the magnetostrictive displacement sensor is not fixed in the oil cylinder in the using process is avoided.
It should be noted that: and a sealing cover is arranged on the inner wall surface of the mounting groove and clamped on the surface of the oil cylinder magnetostrictive displacement sensor, so that the position of the oil cylinder magnetostrictive displacement sensor is further fixed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An explosion-proof magnetostrictive liquid level sensor, comprising a sensor head (1), characterized in that: the sensor is characterized in that a detection rod (2) is fixedly connected to the surface of the sensor head (1), a movable floater (3) is movably connected to the surface of the detection rod (2), and a limiting component (4) is arranged at the end of the detection rod (2).
2. An explosion proof magnetostrictive liquid level sensor according to claim 1, characterized in that: the limiting assembly (4) comprises a limiting block (41), a threaded column (42) and a threaded hole (43), the limiting block (41) is fixedly connected to one end, away from the sensor head (1), of the detecting rod (2), the threaded hole (43) is formed in the end portion of the limiting block (41), and the threaded column (42) is in threaded connection with the inner wall face of the threaded hole (43).
3. An explosion proof magnetostrictive liquid level sensor according to claim 1, characterized in that: the detection rod (2) consists of a waveguide wire, a return lead, a required protective sleeve and a damping element at the tail end.
4. An explosion proof magnetostrictive liquid level sensor according to claim 1, characterized in that: the movable floater (3) contains a permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122319783.8U CN215639683U (en) | 2021-09-24 | 2021-09-24 | Explosion-proof magnetostrictive liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122319783.8U CN215639683U (en) | 2021-09-24 | 2021-09-24 | Explosion-proof magnetostrictive liquid level sensor |
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| Publication Number | Publication Date |
|---|---|
| CN215639683U true CN215639683U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122319783.8U Active CN215639683U (en) | 2021-09-24 | 2021-09-24 | Explosion-proof magnetostrictive liquid level sensor |
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| CN (1) | CN215639683U (en) |
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2021
- 2021-09-24 CN CN202122319783.8U patent/CN215639683U/en active Active
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