CN101324461A - Liquid level detector - Google Patents
Liquid level detector Download PDFInfo
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- CN101324461A CN101324461A CNA200810023127XA CN200810023127A CN101324461A CN 101324461 A CN101324461 A CN 101324461A CN A200810023127X A CNA200810023127X A CN A200810023127XA CN 200810023127 A CN200810023127 A CN 200810023127A CN 101324461 A CN101324461 A CN 101324461A
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Abstract
The invention discloses a liquid level detection device, which comprises at least one magnetic sensor with zero power consumption; a track vertically arranged in the liquid to be measured in a position opposite to the magnetic sensor; a floating ball on the liquid surface; a positioning sheet fixed on the floating ball; and a magnet fixed at one end of the positioning sheet, wherein the other end of the magnet is arranged in the track. The magnetic sensor made of magnetically bistable alloy filaments can induce the position of the floating magnet to convert liquid level into an electric signal, which is transmitted remotely through a cable wire, and the sensor detects the level height according to the induction of magnets at corresponding height without using a power supply and mechanical contacts, thus obviating the generation of electrical sparkles, saving power and achieving safe operation, no mechanical contacts and high reliability. The detection result can be transmitted remotely beyond 1,000 meters to achieve remote detection. The liquid level detection device has the advantages of simple structure, practical use, and wide application range, and is used for remote level detection of inflammable liquid and for remote level detection of liquids of other fields such as chemical engineering, mine and civil fields.
Description
Technical field
The present invention relates to a kind of liquid level detection device.
Background technology
Common liquid-level detecting method has several different methods such as Mechanical Method, supercritical ultrasonics technology, photoelectric method, electric-resistivity method, magnetoelectricity method.Though the mechanical detection method is simple and convenient, can't realize remote detection.And methods such as supercritical ultrasonics technology, photoelectric method, electric-resistivity method and magnetoelectricity method, in known technology, they or the contact is arranged, or need to use power supply.With the magneto-electric liquid level detector is example, and its principle of work is based on the magnetoelectricity transition effects, promptly utilizes magnet-sensitive element that liquid level is determined in the induction in the magnetic field of floating.Once adopted tongue tube as magnet-sensitive element in early days, but because it is a contact switch, poor reliability now is eliminated gradually.Generally adopt Hall circuit as magnetic induction part at present.In order to obtain the field signal of different liquid levels, need to use some Hall circuits to form network at least.Every Hall circuit static current of lcd is about about 10 milliamperes, and each liquid level detector static current of lcd generally will reach more than tens of milliamperes.In with battery powered detection system, this is a no small energy consumption.And if the use mains-supplied if being used for flammable liquid so detects, then exists potential safety hazard, in case because aging circuit or other reasons generation electric spark just have explosion caused danger.In fact, other several magnetic induction parts that use in the magnetoelectricity method at present as mistor, magnetic coder etc., exist similar problem equally.
Summary of the invention
Goal of the invention: the objective of the invention is to overcome the shortcoming of prior art, provide a kind of and need not to use power supply, do not have mechanical contact, can realize the device of remote detection liquid level.
Technical scheme: a kind of liquid level detection device, it comprises at least one magneto-dependent sensor, described magneto-dependent sensor is a zero power consumptive magneto-dependent sensor; With vertically be provided with a track in the testing liquid of magneto-dependent sensor relative position, ball float is arranged on the liquid level, be fixed with spacer on the ball float, an end of spacer is fixed with magnet, the other end is contained in the track.
Described track, ball float, spacer, magnet cartridge one with container that testing liquid is connected in.
The responsive silk of described magneto-dependent sensor is a magnetic bi-stable alloy wire.
Described magneto-dependent sensor comprises responsive silk, coil, lead-in wire, skeleton, shell, embedding part, skeleton is I-shaped, have one at the center of skeleton and run through axial groove, responsive silk is placed in the groove, the lead-in wire injection moulding is fixed on the two ends of skeleton, coil is wrapped in the periphery of skeleton intermediate shaft, the two ends of coil respectively together by pad and two wire bonds, the embedding part is potted in the slit between coil, the skeleton by Embedding Material and forms.
Described magneto-dependent sensor comprises responsive silk, coil, lead-in wire, skeleton, shell, soft magnetism ring, embedding part, baffle plate, wherein the skeleton as coil supporter is that the center that insulating material is made is the right cylinder of through hole, responsive silk is housed in the through hole, respectively be set with a soft magnetism ring, baffle plate on the skeleton of coil both sides, the coil two ends join with two lead-in wires respectively, the embedding part is potted in the slit between shell, the coil by Embedding Material and constitutes, and shell is wrapped in the skeleton outside.
Mounting distance can be adjusted as required between the described magneto-dependent sensor, equidistant installation between the preferred magneto-dependent sensor.
Principle of work of the present invention is: the magneto-dependent sensor that the employing magnetic bi-stable alloy wire is made is to the induction of the magnet positions of floating, convert liquid level to electric signal, carry out the signal is far passed by cable again, magneto-dependent sensor by differing heights detects liquid level to the induction of corresponding height magnet, realizes that non-transformer does not have the long-range Level Detection of mechanical contact.
Magneto-dependent sensor of the present invention is based on the sensor that the magnetoelectricity transfer principle is made, and can convert mechanical energy to electric energy by magnetic field, so its work the time does not need to use power supply and can convert magnetic signal to electric signal.Utilizing in the magneto-dependent sensor responsive silk is the direction of magnetization instant reverse of magnetic bi-stable alloy wire, generates electromotive force in coil.Whether responsive silk direction of magnetization overturns, only to be parallel to the threshold value of magnetic induction density component of responsive silk relevant with external magnetic field, promptly need only magnet near near the magneto-dependent sensor, and the magnetic field intensity that it produced reaches the threshold value of responsive silk magnetization reversal along the component of responsive silk direction, and sensor will be exported an electric signal.Irrelevant with changes of magnetic field speed, promptly irrelevant with the velocity of approach of magnet, therefore can detect the magnetic field of extremely hanging down pace of change, the Level Detection that is suitable for changing at a slow speed.In addition, can also export the sequencing of positive and negative electric signal according to magneto-dependent sensor, further determine the direction of motion of magnet, promptly detecting liquid level is to rise or descend.
Beneficial effect: liquid level detection device of the present invention has following advantage: (1) does not use power supply, saves electric energy; (2) do not have mechanical contact, the reliability height can not produce electric spark, is a kind of detection method of essential safety; (3) testing result can be sent to beyond 1000 meters, thereby realize remote detection; (4) testing result and liquid level change speed are irrelevant, both can detect the liquid level of very rapid variations, also can detect the liquid level that the utmost point changes at a slow speed; (5) device is simple, practical; (6) decapacitation detects outside the liquid level, can also judge that further liquid level is in rising or descends according to the direction that magneto-dependent sensor is exported positive negative signal.(7) applied range both had been applicable to flammable liquid liquid level remote detection, also was applicable to the remote detection of other chemical industry, mine, each field liquid level such as civilian.
Description of drawings
Fig. 1 is a magneto-dependent sensor principle of work synoptic diagram.
Fig. 2 is a liquid level remote detection device synoptic diagram.
Fig. 3 is the A-A view among Fig. 2.
Fig. 4 is the structural representation of first kind of embodiment of magneto-dependent sensor among the present invention.
Fig. 5 is the structural representation of second kind of embodiment of magneto-dependent sensor among the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, dotted line is represented the Distribution of Magnetic Field of magnet 6, and arrow is represented the direction in magnetic field.When magnet 6 during near magneto-dependent sensor 1 lower end, the magnetic induction density component that is parallel to responsive silk 2 reaches setting value B, makes the direction of magnetization of responsive silk 2 point to a, and coil generates a forward electric pulse; When magnet 6 rises to magneto-dependent sensor 1 upper end, the FR at responsive silk 2 places, the magnetic induction density component that is parallel to responsive silk 2 reaches setting value-B, and the direction of magnetization instant reverse of responsive silk 2 points to b, and coil generates a reverse electric pulse.With the magneto-dependent sensor 1 that magnetic bi-stable alloy wire is made, a pair of positive and negative electric pulse of output under the effect of alternating magnetic field, its amplitude can reach more than 3 volts.Experiment utilizes cable directly with beyond the output signal teletransmission to 1000 of magneto-dependent sensor 1 meter as can be known, and its signal amplitude decay is no more than 10%, enough for back level signal demonstration and supervisory system use.
As among Fig. 2 and shown in Figure 3, described container is a drum, and the drum lower sidewalls is provided with a water inlet, can be communicated with testing liquid by communicating pipe.In the drum outside sensor module is housed, described sensor module comprises five magneto-dependent sensors 1 that are fixed on the installing plate, the extension line of magneto-dependent sensor 1 is connected with a connector, the plug connector output terminal is connected with cable, by cable the signal of sensing is passed on the subsequent analysis processing device.Magneto-dependent sensor 1 is equidistant from low to high successively to be arranged on the installing plate, and extreme lower position and extreme higher position magneto-dependent sensor 1 correspond respectively to the minimum liquid level and the highest liquid level of testing liquid.
Be provided with the track 3 of a vertical liquid level in the staving, described track 3 is the Baltimore groove track, and track 3 is arranged on the drum inwall relative with magneto-dependent sensor 1; Be suspended with a ball float 4 on the liquid level in bucket, be bonded with spacer 5 on the ball float 4, be bonded with magnet 6 on spacer 5 one ends, described magnet 6 is permanent magnet, spacer 5 other ends are contained in the track 3, the end that described spacer 5 is contained in the track 3 is suitable with the shape of track 3, for example can be arranged to one and the suitable projection of track 3 sizes.During the liquid level change, the positioning action of spacer 5 and track 3 has been arranged, ball float 4 can only fluctuate along vertical track 3, can avoid ball float 4 to rotate when unsteady, and the magnet 6 on the assurance ball float 4 is all the time towards magneto-dependent sensor 1.Can staving be set yet and directly track 3, ball float 4, spacer 5, magnet 6 vertically be fixed in the testing liquid.
The distance of magnet 6 should be according to the magnetic field intensity adjustment of magnet 6 in magneto-dependent sensor 1 and the cylinder, guarantees along the magnetic induction component of responsive silk 2 directions of magneto-dependent sensor 1 threshold value greater than the upset of responsive silk 2 direction of magnetization.
Figure 4 shows that the structural representation of first kind of embodiment of magneto-dependent sensor of the present invention; the skeleton 9 of described magneto-dependent sensor 1 is circular I-shaped for xsect; axially have a groove that runs through the central shaft body at skeleton 9; responsive silk 2 is placed in the groove; 8 injection mouldings that go between are fixed on the two ends of skeleton 9; coil 7 is wrapped in skeleton 9 axis body peripheries; the two ends of coil 7 weld together by pad and two lead-in wires 8 respectively; embedding part 11 is potted in coil 7 by Embedding Material; form shell 10 in the slit between the skeleton 9; embedding part 11 plays the effect of protection magneto-dependent sensor 1 inner each several part.
Figure 5 shows that the structural representation of second kind of embodiment of magneto-dependent sensor of the present invention, described magneto-dependent sensor comprises responsive silk 2, coil 7, lead-in wire 8, skeleton 9, shell 10, embedding part 11, soft magnetism ring 12, baffle plate 13, wherein the center of making for insulating material as the skeleton 9 of coil 7 carriers is the right cylinder of through hole, responsive silk 2 is housed in the through hole, respectively be set with a soft magnetism ring 12 on the skeleton 9 of coil 7 both sides, baffle plate 13, coil 7 two ends join with lead-in wire 8, embedding part 11 is potted in shell 10 by Embedding Material, constitute in the slit between the coil 7, shell 10 is wrapped in skeleton 9 outsides.
Testing process is as follows: pick-up unit of the present invention is communicated with liquid level to be measured, ball float 4 and magnet 6 float on the testing liquid liquid level, and when supposing that liquid level arrives a certain height, magnet 6 is contour with the lower end of a certain magneto-dependent sensor 1, this moment, magneto-dependent sensor 1 was triggered, and sent a positive pulse electric signal; Liquid level continues to rise, and contour with the upper end of this magneto-dependent sensor 1 when magnet 6, this moment, magneto-dependent sensor 1 sent a negative pulse electric signal.When liquid level continued to raise, the lower end of the top magneto-dependent sensor 1 that magnet 6 and position are higher was contour, and then this top magneto-dependent sensor 1 is triggered, and sends a positive pulse electric signal; When liquid level continued to rise, magnet 6 was contour with the upper end of top magneto-dependent sensor 1, and this moment, magneto-dependent sensor 1 sent a negative pulse electric signal.The rest may be inferred, and the electric signal that different magneto-dependent sensors 1 send is handled, and just can realize that long-distance intelligent detects the purpose of liquid level.Otherwise when liquid level descended, magnet 6 triggered a certain magneto-dependent sensor 1 in the upper end earlier, sends a negative pulse electric signal, when dropping to a certain magneto-dependent sensor 1 lower end, sends a positive pulse signal.The sequencing that the positive and negative electric signal that each magneto-dependent sensor 1 is sent sends is analyzed, and can also judge further that liquid level is to rise or descend.
The invention provides a kind of thinking and method of liquid level detection device; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each component part not clear and definite in the present embodiment is realized.
Claims (6)
1, a kind of liquid level detection device is characterized in that: it comprises at least one magneto-dependent sensor (1), and described magneto-dependent sensor (1) is a zero power consumptive magneto-dependent sensor; With vertically be provided with a track (3) in the testing liquid of magneto-dependent sensor (1) relative position, ball float (4) is arranged on the liquid level, be fixed with spacer (5) on the ball float (4), an end of spacer (5) is fixed with magnet (6), the other end is contained in the track (3).
2, liquid level detection device according to claim 1 is characterized in that: described track (3), ball float (4), spacer (5), magnet (6) be contained in one with container that testing liquid is connected in.
3, liquid level detection device according to claim 1 and 2 is characterized in that: the responsive silk (2) of described magneto-dependent sensor (1) is a magnetic bi-stable alloy wire.
4, liquid level detection device according to claim 1 and 2, it is characterized in that: described magneto-dependent sensor (1) comprises responsive silk (2), coil (7), lead-in wire (8), skeleton (9), shell (10), embedding part (11), skeleton (9) is I-shaped, have one at the center of skeleton (9) and run through axial groove, responsive silk (2) is placed in the groove, lead-in wire (8) is fixed on the two ends of skeleton (9), coil (7) is wrapped in the periphery of skeleton (9) intermediate shaft, the two ends of coil (7) weld together by pad and two lead-in wires (8) respectively, and embedding part (11) is potted in coil (7) by Embedding Material, form in the slit between the skeleton (9).
5, liquid level detection device according to claim 1 and 2, it is characterized in that: described magneto-dependent sensor (1) comprises responsive silk (2), coil (7), lead-in wire (8), skeleton (9), shell (10), embedding part (11), soft magnetism ring (12), baffle plate (13), wherein the center of making for insulating material as the skeleton (9) of coil (7) carrier is the right cylinder of through hole, responsive silk (2) is housed in the through hole, respectively be set with a soft magnetism ring (12) on the skeleton (9) of coil (7) both sides, baffle plate (13), coil (7) two ends join with two lead-in wires (8) respectively, embedding part (11) is potted in shell (10) by Embedding Material, constitute in the slit between the coil (7), shell (10) is wrapped in skeleton (9) outside.
6, liquid level detection device according to claim 1 and 2 is characterized in that: equidistant installation between the described sensor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810023127XA CN101324461A (en) | 2008-07-29 | 2008-07-29 | Liquid level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810023127XA CN101324461A (en) | 2008-07-29 | 2008-07-29 | Liquid level detector |
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| CN101324461A true CN101324461A (en) | 2008-12-17 |
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| CNA200810023127XA Pending CN101324461A (en) | 2008-07-29 | 2008-07-29 | Liquid level detector |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221392A (en) * | 2011-03-31 | 2011-10-19 | 武汉理工大学 | Liquid level measurement method based on magnetic coupling and optical fiber pair array |
| CN105547417A (en) * | 2015-05-11 | 2016-05-04 | 王辉 | Liquid level sensor |
| WO2017139960A1 (en) * | 2016-02-18 | 2017-08-24 | 东莞正扬电子机械有限公司 | Fluid level detection method and apparatus |
| CN108226971A (en) * | 2016-12-13 | 2018-06-29 | 西格玛-奥德里奇国际股份有限公司 | Electronic assembly for wireless transmission of at least one status information |
| CN108801389A (en) * | 2018-06-08 | 2018-11-13 | 中国石油天然气股份有限公司 | Method and device for determining starting and stopping liquid level height of crude oil and storage medium |
| CN108955830A (en) * | 2018-09-04 | 2018-12-07 | 西北农林科技大学 | A kind of channel water level real-time monitoring device |
| CN109443498A (en) * | 2019-01-07 | 2019-03-08 | 肇庆市高新区笙辉机械有限公司 | A kind of liquid level detection device and liquid-level detecting method |
| CN109849853A (en) * | 2017-11-30 | 2019-06-07 | 福特全球技术公司 | Cleaning fluid tank with magneto-responsive sensor |
| CN110579262A (en) * | 2019-09-10 | 2019-12-17 | 珠海格力智能装备有限公司 | liquid level detection method and device |
| CN111164390A (en) * | 2017-10-10 | 2020-05-15 | 罗伯特·博世有限公司 | Device, braking system, method for detecting the filling level of a liquid in a container |
| CN111947731A (en) * | 2020-08-17 | 2020-11-17 | 安徽徽宁电器仪表集团有限公司 | Liquid level meter for reaction container |
| RU2772421C1 (en) * | 2021-07-23 | 2022-05-19 | Дмитрий Григорьевич Селезнев | Detector of the liquid level in the vessel |
| CN114543943A (en) * | 2022-04-28 | 2022-05-27 | 胜利油田东强机电设备制造有限公司 | Magnetic turning plate liquid level meter capable of preventing blocking of turning column |
-
2008
- 2008-07-29 CN CNA200810023127XA patent/CN101324461A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221392A (en) * | 2011-03-31 | 2011-10-19 | 武汉理工大学 | Liquid level measurement method based on magnetic coupling and optical fiber pair array |
| CN105547417A (en) * | 2015-05-11 | 2016-05-04 | 王辉 | Liquid level sensor |
| WO2017139960A1 (en) * | 2016-02-18 | 2017-08-24 | 东莞正扬电子机械有限公司 | Fluid level detection method and apparatus |
| CN108226971A (en) * | 2016-12-13 | 2018-06-29 | 西格玛-奥德里奇国际股份有限公司 | Electronic assembly for wireless transmission of at least one status information |
| CN108226971B (en) * | 2016-12-13 | 2024-05-17 | 西格玛-奥德里奇化学股份有限公司 | Electronic component for wireless transmission of at least one status information |
| US11624643B2 (en) | 2017-10-10 | 2023-04-11 | Robert Bosch Gmbh | Unit for detecting the filling level of a liquid in a container, braking system, and method |
| CN111164390A (en) * | 2017-10-10 | 2020-05-15 | 罗伯特·博世有限公司 | Device, braking system, method for detecting the filling level of a liquid in a container |
| CN109849853A (en) * | 2017-11-30 | 2019-06-07 | 福特全球技术公司 | Cleaning fluid tank with magneto-responsive sensor |
| CN108801389A (en) * | 2018-06-08 | 2018-11-13 | 中国石油天然气股份有限公司 | Method and device for determining starting and stopping liquid level height of crude oil and storage medium |
| CN108955830A (en) * | 2018-09-04 | 2018-12-07 | 西北农林科技大学 | A kind of channel water level real-time monitoring device |
| CN109443498A (en) * | 2019-01-07 | 2019-03-08 | 肇庆市高新区笙辉机械有限公司 | A kind of liquid level detection device and liquid-level detecting method |
| CN110579262A (en) * | 2019-09-10 | 2019-12-17 | 珠海格力智能装备有限公司 | liquid level detection method and device |
| CN111947731A (en) * | 2020-08-17 | 2020-11-17 | 安徽徽宁电器仪表集团有限公司 | Liquid level meter for reaction container |
| RU2772421C1 (en) * | 2021-07-23 | 2022-05-19 | Дмитрий Григорьевич Селезнев | Detector of the liquid level in the vessel |
| CN114543943A (en) * | 2022-04-28 | 2022-05-27 | 胜利油田东强机电设备制造有限公司 | Magnetic turning plate liquid level meter capable of preventing blocking of turning column |
| CN114543943B (en) * | 2022-04-28 | 2022-06-28 | 胜利油田东强机电设备制造有限公司 | Magnetic turning plate liquid level meter capable of preventing blocking of turning column |
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