CN205352512U - Magnetostrictive liquid level sensor - Google Patents
Magnetostrictive liquid level sensor Download PDFInfo
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- CN205352512U CN205352512U CN201620114825.0U CN201620114825U CN205352512U CN 205352512 U CN205352512 U CN 205352512U CN 201620114825 U CN201620114825 U CN 201620114825U CN 205352512 U CN205352512 U CN 205352512U
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Abstract
The utility model discloses a magnetostrictive liquid level sensor, it includes sensor head portion, measuring stick and floater subassembly, the measuring stick with the fixed connection of sensor head portion, the floater unit mount is in on the measuring stick, just the floater subassembly can be followed the measuring stick shell freely removes, including fixing base, measuring circuit subassembly, outer shield cover and coil shield cover in the sensor head portion, the measuring circuit subassembly includes coil, measuring circuit board and loop line, the measuring circuit board is installed on the fixing base, the coil is installed on the measuring circuit board, the coil shielding covers the shielding is realized to the coil to the coil, the outer shield cover is installed on the fixing base, covers the measuring circuit board with the coil, it is right the shielding is realized to the measuring circuit subassembly. The influence that this magnetostrictive liquid level sensor space utilization is high, can effectively reduce noise and electromagnetic interference has advantages such as the interference killing feature is strong, measurement accuracy height.
Description
Technical field
This utility model relates to sensor technical field, is specifically related to a kind of magnetostrictive liquid level sensor of energy normal operation under strong electromagnetic interference environment.
Background technology
Magnetostrictive liquid level sensor, is utilize the Wiedemann effectiveness of magnetostriction materials, intersected by two different magnetic fields and produce strain-pulse signal and accurately measure the instrument of position.What it measured implementation is the non-cpntact measurement of absolute position, has range big, and precision is high, and high reliability is widely used in various position measurement.
But owing to the generation of magnetostrictive liquid level sensor signal is based on the magnetic field that current impulse produces, the collection of signal adopts coil class perceptual device, these Sensitive Apparatuses or magnetic field are easily subject to the impact of various interference, when especially using under complicated electromagnetic environment, such as fast-pulse group, conduction, radiation, electrostatic, during the interference such as surge voltage and surge current, output of products is beated very big, exceedes accuracy rating;Or output distortion；Time serious, the complete cisco unity malfunction of product, even damages.
The Chinese invention patent application that publication number is CN103837211A discloses a kind of magnetostrictive liquid level sensor based on Fe-Ga material.The composition of this sensor includes sensor head, measures bar and float, and wherein, sensor head is threaded connection and measures bar and be connected, and movable float is enclosed within the bottom of measurement bar；Sensor head is cylinder-like structure, and inside includes ware circuit, detecting device and front damping unit；Waveguide filament is Fe-Ga material, is measuring inside bar；Waveguide filament front end enters sensor head by screwed hole, sequentially passes through the coil rack in detecting device and the center of front damping unit, is directly connected into ware circuit；Waveguide filament end is connected through the center of rear damping unit with return conductor, and return conductor takes back hardware circuit, forms the loop of Guan Bi.It adopts Fe-Ga alloy as the waveguide filament material of magnetostrictive liquid level sensor, it is possible to be applied in the liquid level sensor of wide range, can under more severe noisy environment steady operation.But owing to it lacks Antijamming protecting method under complex electromagnetic environment, have the disadvantage in that
(1) described coil is easily by the impact of strong electromagnetic, causes the collection distortion of coil pulse signals, and signal output is abnormal, measures inaccurate；
(2) described product is under the working conditions such as stronger surge voltage and surge current, and product lacks protection circuit, it is easy to cause damaging；
(3) product is under the working environment of electrical fast transient (eft) and the conduction of radio frequency electromagnetic field sensing, exports signal saltus step, it is impossible to normal operation；
In sum, although existing magnetostrictive liquid level sensor when conventional noise jamming, is achieving certain achievement by structure and circuit.When but product is under strong electromagnetic interference environment, can not as in normal circumstances normal operation.
If it is possible to develop a kind of magnetostrictive high precision liquid level sensor that can be applicable under strong electromagnetic interference environment；Can under strong electromagnetic interference environment also can normal operation, then will great market prospect.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of magnetostrictive liquid level sensor that can be applicable under strong electromagnetic interference environment.It sets out according to the three elements " electromagnetic disturbance source, coupling path or propagation ducts, sensitive equipment " of electromagnetic interference, sees clearly the harassing and wrecking source object impact on circuit function unit;Cut off propagation ducts and coupling path;Sensitive Apparatus is carried out shielding protection, thus realizing this utility model also can realize normal operation under strong electromagnetic interference environment.This magnetostrictive liquid level sensor space availability ratio is high, can effectively reduce the impact of noise and electromagnetic interference, has that capacity of resisting disturbance is strong, certainty of measurement advantages of higher.
For solving problems of the prior art, the concrete technical scheme of employing is:
A kind of magnetostrictive liquid level sensor, including sensor head, measures bar and floating ball component；Described measurement bar is fixing with described sensor head to be connected, and described floating ball component is arranged on described measurement bar, and described floating ball component can move freely along described measurement bar shell；Described magnetostrictive liquid level sensor also includes power protecting circuit plate, and this power protecting circuit plate is positioned at described sensor head；This power protecting circuit plate for carrying out multi-stage protection to input power, and opposing outside electromagnetic interference is to guarantee input power good.
Preferred technical scheme, includes fixing seat, measuring circuit assembly, external shield and coil radome in described sensor head, described measuring circuit assembly includes coil, measuring circuit plate and loop line；Described measuring circuit plate is arranged on fixing seat, and described coil is arranged on measuring circuit plate；Coil is stated in described coil radome residence, and coil is realized shielding；Described external shield is arranged on fixing seat, covers described measuring circuit plate and described coil, and described measuring circuit assembly is realized shielding；Described measurement bar includes the outer pillar of metal, insulation inner protective tube, waveguide filament and damping；Described waveguide filament one end is connected with measuring circuit plate after coil endoporus, and damping is arranged on the waveguide filament other end, and the waveguide filament other end is connected by fixation clamp and loop line one end are fixing；The described loop line other end is connected with measuring circuit plate；Described insulation inner protective tube is set on waveguide filament, between the outer pillar of waveguide filament and metal.
Preferred technical scheme, described power protecting circuit plate includes the Pyatyi protection circuit sequentially connected；Wherein, first order protection circuit includes discharge tube, and this discharge tube first end and the second end connect the positive and negative two-stage of power supply, the 3rd end ground connection respectively；Second level protection circuit includes the bi-directional voltage stabilizing pipe, electric fuse and the diode that sequentially connect, and described bi-directional voltage stabilizing pipe two ends also protect discharge tube first end of circuit and the second end to be connected with the first order respectively；Third level protection circuit is primary filter circuit; it includes the first electric capacity, the second electric capacity and the 3rd electric capacity; with the 3rd Capacitance parallel connection after described first electric capacity and the second capacitances in series; and the first link ground connection of electric capacity and the second electric capacity; the ungrounded end of the first electric capacity is connected with positive pole, and the ungrounded end of the second electric capacity is connected with negative pole；Fourth stage protection circuit is isolation protective circuit, and it includes isolator, and this isolator protects the 3rd electric capacity of circuit to be connected with the third level；Level V protection circuit is secondary filter circuit, and this secondary filter circuit includes the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, with the 6th Capacitance parallel connection after the 4th electric capacity and the 5th capacitances in series；6th electric capacity two ends are the outfan of power protecting circuit plate.Power protecting circuit is for the pathway of electromagnetic interference, by Pyatyi protection circuit such as ground connection, filtering, isolation, interference is cut off from power end, thus ensureing normal operation of the present utility model.
Preferred technical scheme, the electric fuse in described second level protection circuit is the electric fuse with self-healing, the open circuit when there is surge direct current, when input voltage recovers can automatically recover conducting after normally.
Preferred technical scheme, the coil in described measuring circuit assembly is unicoil, and measuring circuit plate adopts differential amplifier circuit to gather this unicoil induced signal.Differential Input can effectively eliminate common mode noise signal, thus improving the signal to noise ratio of this utility model output signal, improves accuracy of detection and capacity of resisting disturbance；Compared to the Differential Input of twin coil, this utility model adopts unicoil, makes coil Differential Input measuring circuit by circuit mode, so can effectively reduce the size of coil, improves space availability ratio.
Preferred technical scheme, described coil radome is the square radome of the nickel alloy with Magnet.The signal to noise ratio of signal can be effectively improved on the one hand;On the other hand due to the combined effect of Magnet and nickel alloy material, can effectively shield the interference to Sensitive Apparatus coil of the outside electromagnetic interference.
Preferred technical scheme, described external shield is the square radome of corronil.External shield covers described measuring circuit plate and described coil, it is possible to the effectively outside radiation interference to measuring circuit plate and coil of shielding.
By adopting such scheme, compared with prior art, it has the technical effect that a kind of magnetostrictive liquid level sensor of the present utility model
This utility model adopts unicoil to obtain the positional information of magnet assemblies, gathers induction coil in measuring circuit by differential amplification form simultaneously, can effectively reduce noise, it is prevented that the common mode disturbances impact on output signal；Further, since adopt multilayer screen technology, therefore preventing the impact on measuring circuit and Sensitive Apparatus and coil of the electromagnetic interference in external space, improve the capacity of resisting disturbance of product, signal output is more stable；Further; owing to adopting power protecting circuit; by various protection devices; multi-stage filter circuit and grounding technology; it is highly resistant to the impact of the various strong electromagnetic such as surge voltage, electrostatic and impulse train; thus improving the capacity of resisting disturbance of product, the enforcement of multi-stage protection scheme ensure that product also can normal operation under strong electromagnetic interference environment.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of magnetostrictive liquid level sensor of this utility model；
Fig. 2 is the measurement bar partial structurtes schematic diagram of a kind of magnetostrictive liquid level sensor of this utility model；
Fig. 3 is the sensor head partial structurtes schematic diagram of a kind of magnetostrictive liquid level sensor of this utility model；
Fig. 4 is the circuit theory schematic diagram of the power protection plate of a kind of magnetostrictive liquid level sensor of this utility model.
Description of reference numerals:
1, sensor head, 11, fixing seat, 12, measuring circuit assembly, 121, coil, 122, measuring circuit plate, 123, loop line, 13, external shield, 14, coil radome；2, bar is measured, 21, the outer pillar of metal, 22, insulation inner protective tube, 23, waveguide filament, 24, damping；3, floating ball component；4, fixation clamp；5, power protecting circuit plate, 501, discharge tube, 502, bi-directional voltage stabilizing pipe, 503, electric fuse; 504, diode, the 505, first electric capacity, the 506, second electric capacity, the 507, the 3rd electric capacity; 508, isolator, the 509, the 4th electric capacity, the 510, the 5th electric capacity, the 511, the 6th electric capacity.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with instantiation, this utility model is further described.It should be understood that these descriptions are illustrative of, and it is not intended to limit scope of the present utility model.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring concept of the present utility model.
As shown in Figures 1 to 4,
A kind of magnetostrictive liquid level sensor includes sensor head 1, measures bar 2 and floating ball component 3；Described measurement bar 2 is fixing with described sensor head 1 to be connected, and described floating ball component 3 is arranged on described measurement bar 2, and described floating ball component 3 can move freely along described measurement bar 2 shell；Including fixing seat 11, measuring circuit assembly 12, external shield 13 and coil radome 14 in described sensor head 1, described measuring circuit assembly 12 includes coil 121, measuring circuit plate 122 and loop line 123；Described measuring circuit plate 122 is arranged on fixing seat 11, and described coil 121 is arranged on measuring circuit plate 122；Coil 121 is stated in described coil radome 14 residence, and coil 121 is realized shielding；Described external shield 13 is arranged on fixing seat 11, covers described measuring circuit plate 122 and described coil 121, and described measuring circuit assembly 12 is realized shielding；Described measurement bar 2 includes the outer pillar 21 of metal, insulation inner protective tube 22, waveguide filament 23 and damping 24；Described waveguide filament 23 one end is connected with measuring circuit plate 122 after coil 121 endoporus, and damping 24 is arranged on waveguide filament 23 other end, and waveguide filament 23 other end is connected by fixation clamp 4 and loop line 123 one end are fixing；Described loop line 123 other end is connected with measuring circuit plate 122；Described insulation inner protective tube 22 is set on waveguide filament 23, between the outer pillar 21 of waveguide filament 23 and metal.
Described magnetostrictive liquid level sensor also includes power protecting circuit plate 5, and this power protecting circuit plate 5 is positioned at described sensor head 1, and is positioned at outside described external shield 13；This power protecting circuit plate 5 for carrying out multi-stage protection to input power, and opposing outside electromagnetic interference is to guarantee input power good.
Described power protecting circuit plate 5 includes the Pyatyi protection circuit sequentially connected；Wherein, first order protection circuit includes discharge tube 501, and this discharge tube 501 first end and the second end connect the positive and negative two-stage of power supply, the 3rd end ground connection respectively；Second level protection circuit includes the bi-directional voltage stabilizing pipe 502, electric fuse 503 and the diode 504 that sequentially connect, and described bi-directional voltage stabilizing pipe 502 two ends also protect discharge tube 501 first end of circuit and the second end to be connected with the first order respectively；Third level protection circuit is primary filter circuit; it includes the first electric capacity the 505, second electric capacity 506 and the 3rd electric capacity 507; described first electric capacity 505 and the second electric capacity 506 are in parallel with the 3rd electric capacity 507 after connecting; and the first link ground connection of electric capacity 505 and the second electric capacity 506; the ungrounded end of the first electric capacity 505 is connected with positive pole, and the ungrounded end of the second electric capacity 506 is connected with negative pole；Fourth stage protection circuit is isolation protective circuit, and it includes isolator 508, and this isolator 508 protects the 3rd electric capacity 507 of circuit to be connected with the third level；Level V protection circuit is secondary filter circuit, and this secondary filter circuit includes after the 4th electric capacity the 509, the 5th electric capacity 510 and the 6th electric capacity 511, the 4th electric capacity 509 and the 5th electric capacity 510 are connected and the 6th electric capacity 511 is in parallel；6th electric capacity 511 two ends are the outfan of power protecting circuit plate 5.Power protecting circuit is for the pathway of electromagnetic interference, by Pyatyi protection circuit such as ground connection, filtering, isolation, interference is cut off from power end, thus ensureing normal operation of the present utility model.
Electric fuse 503 in described second level protection circuit is the electric fuse with self-healing, the open circuit when there is surge direct current, when input voltage recovers can automatically recover conducting after normally.
Coil 121 in described measuring circuit assembly 12 is unicoil, and measuring circuit plate 122 adopts differential amplifier circuit to gather this unicoil 121 induced signal.Differential Input can effectively eliminate common mode noise signal, thus improving the signal to noise ratio of this utility model output signal, improves accuracy of detection and capacity of resisting disturbance；Compared to the Differential Input of twin coil, this utility model adopts unicoil, makes coil Differential Input measuring circuit by circuit mode, so can effectively reduce the size of coil, improves space availability ratio.
Described coil radome 14 is the square radome of the nickel alloy with Magnet.The signal to noise ratio of signal can be effectively improved on the one hand;On the other hand due to the combined effect of Magnet and nickel alloy material, can effectively shield the interference to Sensitive Apparatus coil of the outside electromagnetic interference.
Described external shield 13 is the square radome of corronil.External shield 13 covers described measuring circuit plate 122 and described coil 121, it is possible to the effectively outside radiation interference to measuring circuit plate 122 and coil 121 of shielding.The double shield cover adopted, it is possible to play shield effectiveness better.
The operation principle of this magnetostrictive liquid level sensor is as follows:
The pulse current that measuring circuit plate 122 produces is had to be loaded on waveguide filament 23 by loop line 123, and axially produce the longitudinal magnetic field that this pulse current of longitudinal magnetic field produces along waveguide filament 23 and join mutually at floating ball component 3 place with the magnetic field that floating ball component 3 produces, waveguide filament 23 produces pulse signal, this pulse signal is along waveguide, 23 propagate to its two ends, when this signal propagates damping 24 place of waveguide filament 23 one end, due to the effect of damping 24, signal is cut in disappearing；This signal is propagated along waveguide filament 23 when arriving coil 121 place, coil 121 obtains this signal and is converted into corresponding electric signal, and obtained by measuring circuit plate 122, obtain the time difference of the signal of telecommunication by the pulse current of computation and measurement circuit board 122 and measuring circuit plate 122 and namely can determine that the present position of floating ball component 3.
During utility model works, being respectively provided with external shield 13 and coil radome 14, coil radome 14 is the square shielding device of the nickel alloy with Magnet, and its effect can be effectively improved the signal to noise ratio of signal on the one hand；On the other hand due to the combined effect of Magnet and nickel alloy material, can effectively shield the interference to Sensitive Apparatus coil 121 of the outside electromagnetic interference；External shield 13 is for preventing the external interference radiation interference to measuring circuit plate 122 and coil 121, so after two-layer shields, make Sensitive Apparatus measuring circuit plate 122 and coil 121 be highly resistant to external electromagnetic radiation interference, make the product also can normal operation under complicated electromagnetic interference；
There is various noise signal during work, as spatial electromagnetic disturb bring noise, system power supply noise, Acquisition Circuit noise, the pulse power produces the various noise signals such as each self noise when working on waveguide filament 23, and these interference noises can affect the output of product.This utility model adopts unicoil 121 to obtain the positional information of floating ball component 3, measuring circuit plate 122 and unicoil 121, measuring circuit plate 122 gathers unicoil 121 induced signal by differential amplification form, can effectively reduce noise, thus improving the signal to noise ratio of product output signal, improve accuracy of detection and capacity of resisting disturbance;Compared to the Differential Input of twin coil, this utility model adopts unicoil, makes coil Differential Input Acquisition Circuit by circuit mode, so can effectively reduce the size of coil, improves space availability ratio.
This utility model adopts power protection plate 5 to provide multi-stage protection, multi-layer filtering to input power, is highly resistant to the electromagnetic interference in the external world, it is ensured that stablizing of input power supply.As shown in fig. 4; power protection plate 5 adopts five layers of protected location; first order protection circuit is just adopting 501 liang of termination powers of discharge tube; power supply bear, the 3rd end ground connection, discharge tube 501 big voltage can be quickly introduced " " layer; second level protection circuit is made up of bi-directional voltage stabilizing pipe 502, electric fuse 503 and diode 504; bi-directional voltage stabilizing pipe 502 can reduce the residual voltage of discharge tube 501 further, and electric fuse 503 is to the direct open circuit of surge current, it is prevented that overcurrent.
Damaging circuit below, electric fuse 503 has self-healing, and input voltage returns to after normally can automatically restore to normal condition；Third level protection circuit is first-level filtering wave circuit (primary filter circuit), is made up of three electric capacity 505,506 and 507；Fourth stage protection circuit is isolation protective circuit, is made up of isolator 508；Level V protection circuit is secondary filter circuit (secondary filter circuit); it is made up of three electric capacity 509,510 and 511; three-level protective circuit can effectively to eliminating the residual voltage after the second level is protected below; reduce power supply noise; the harmonic wave of input power, High-frequency Interference etc. can be effectively eliminated; the power supply of one " stable, clean " is provided, it is thus possible to effectively suppress electromagnetic interference, it is ensured that magnetostrictive high precision liquid level sensor also can normal operation under strong electromagnetic interference environment for system.
Compared to the Differential Input of twin coil, (two coil windings need electrical characteristic consistent, around on the contrary；During installation, the signal that two coil-induced waveguide filaments pass over, technique need Striking symmetry install, otherwise owing to coil windings electrical characteristic is inconsistent or it is asymmetric to install processing technology, to cause that two signal sources entering differential amplification are not same amplitude two signals in opposite direction, further can not effectively difference eliminate noise) this utility model adopt unicoil, by reference voltage and upper and lower pull-up resistor effect, make unicoil signal differential input Acquisition Circuit, so not only can effectively reduce the size of coil, improve space availability ratio；Also can effectively reduce coil on the other hand and make the difficulty with mounting process, the effective differential amplification of energy, eliminate noise.
Above-described embodiment is tested in carrying out strong electromagnetic interference environment, each through test.Its test is as follows with specific reference to international standard: surge immunity IEC61000-4-5:2005, tests grade: 4 grades；Electrical fast transient (eft) immunity to interference IEC61000-4-4:2012, tests grade: 4 grades；Esd immunity IEC61000-4-2:2008, tests grade: 4 grades；Radio frequency electromagnetic field radiation immunity IEC61000-4-3:2006+A1:2007+A2010 tests grade: 4 grades；The conducted immunity IEC61000-4-6:2008 of radio frequency electromagnetic field sensing, tests grade: 4 grades；Radio frequency electromagnetic field radiation harassing and wrecking degree EN55022:2010+AC:2011, tests grade: classA；The conduction interference degree EN55022:2010+AC:2011 of radio frequency electromagnetic field sensing, tests grade: classA.
The foregoing is only preferred embodiment of the present utility model; not in order to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replace, be all contained within protection domain of the present utility model.
Claims (7)
1. a magnetostrictive liquid level sensor, including sensor head, measures bar and floating ball component；Described measurement bar is fixing with described sensor head to be connected, and described floating ball component is arranged on described measurement bar, and described floating ball component can move freely along described measurement bar shell；It is characterized in that: it also includes power protecting circuit plate, this power protecting circuit plate is positioned at described sensor head；This power protecting circuit plate for carrying out multi-stage protection to input power, and opposing outside electromagnetic interference is to guarantee input power good.
2. a kind of magnetostrictive liquid level sensor according to claim 1, it is characterized in that: including fixing seat, measuring circuit assembly, external shield and coil radome in described sensor head, described measuring circuit assembly includes coil, measuring circuit plate and loop line；Described measuring circuit plate is arranged on fixing seat, and described coil is arranged on measuring circuit plate；Coil is stated in described coil radome residence, and coil is realized shielding；Described external shield is arranged on fixing seat, covers described measuring circuit plate and described coil, and described measuring circuit assembly is realized shielding；Described measurement bar includes the outer pillar of metal, insulation inner protective tube, waveguide filament and damping；Described waveguide filament one end is connected with measuring circuit plate after coil endoporus, and damping is arranged on the waveguide filament other end, and the waveguide filament other end is connected by fixation clamp and loop line one end are fixing；The described loop line other end is connected with measuring circuit plate；Described insulation inner protective tube is set on waveguide filament, between the outer pillar of waveguide filament and metal.
3. a kind of magnetostrictive liquid level sensor according to claim 1, it is characterised in that: described power protecting circuit plate includes the Pyatyi protection circuit sequentially connected；Wherein, first order protection circuit includes discharge tube, and this discharge tube first end and the second end connect the positive and negative two-stage of power supply, the 3rd end ground connection respectively；Second level protection circuit includes the bi-directional voltage stabilizing pipe, electric fuse and the diode that sequentially connect, and described bi-directional voltage stabilizing pipe two ends also protect discharge tube first end of circuit and the second end to be connected with the first order respectively；Third level protection circuit is primary filter circuit; it includes the first electric capacity, the second electric capacity and the 3rd electric capacity; with the 3rd Capacitance parallel connection after described first electric capacity and the second capacitances in series; and the first link ground connection of electric capacity and the second electric capacity; the ungrounded end of the first electric capacity is connected with positive pole, and the ungrounded end of the second electric capacity is connected with negative pole；Fourth stage protection circuit is isolation protective circuit, and it includes isolator, and this isolator protects the 3rd electric capacity of circuit to be connected with the third level；Level V protection circuit is secondary filter circuit, and this secondary filter circuit includes the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, with the 6th Capacitance parallel connection after the 4th electric capacity and the 5th capacitances in series；6th electric capacity two ends are the outfan of power protecting circuit plate.
4. a kind of magnetostrictive liquid level sensor according to claim 3; it is characterized in that: the electric fuse in described second level protection circuit is the electric fuse with self-healing; the open circuit when there is surge direct current, when input voltage recovers can automatically recover conducting after normally.
5. a kind of magnetostrictive liquid level sensor according to claim 2, it is characterised in that: the coil in described measuring circuit assembly is unicoil, and measuring circuit plate adopts differential amplifier circuit to gather this unicoil induced signal.
6. a kind of magnetostrictive liquid level sensor according to claim 2, it is characterised in that: described coil radome is the square radome of the nickel alloy with Magnet.
7. a kind of magnetostrictive liquid level sensor according to claim 2, it is characterised in that: described external shield is the square radome of corronil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114825.0U CN205352512U (en) | 2016-02-04 | 2016-02-04 | Magnetostrictive liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114825.0U CN205352512U (en) | 2016-02-04 | 2016-02-04 | Magnetostrictive liquid level sensor |
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| CN205352512U true CN205352512U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620114825.0U Withdrawn - After Issue CN205352512U (en) | 2016-02-04 | 2016-02-04 | Magnetostrictive liquid level sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547416A (en) * | 2016-02-04 | 2016-05-04 | 北京和光伟业传感技术有限公司 | Magnetostriction liquid level sensor |
| CN112729479A (en) * | 2020-12-23 | 2021-04-30 | 北京斯克维思仪表有限公司 | Coil type magnetostrictive sensor |
| CN112857534A (en) * | 2021-01-21 | 2021-05-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
-
2016
- 2016-02-04 CN CN201620114825.0U patent/CN205352512U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547416A (en) * | 2016-02-04 | 2016-05-04 | 北京和光伟业传感技术有限公司 | Magnetostriction liquid level sensor |
| CN105547416B (en) * | 2016-02-04 | 2018-09-18 | 北京和光伟业传感技术有限公司 | A kind of magnetostrictive liquid level sensor |
| CN112729479A (en) * | 2020-12-23 | 2021-04-30 | 北京斯克维思仪表有限公司 | Coil type magnetostrictive sensor |
| CN112857534A (en) * | 2021-01-21 | 2021-05-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
| CN112857534B (en) * | 2021-01-21 | 2022-04-01 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
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Granted publication date: 20160629 Effective date of abandoning: 20180918 |
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