CN2141888Y - High pressure isolated Hall effect displacement transducer - Google Patents
High pressure isolated Hall effect displacement transducer Download PDFInfo
- Publication number
- CN2141888Y CN2141888Y CN 92238485 CN92238485U CN2141888Y CN 2141888 Y CN2141888 Y CN 2141888Y CN 92238485 CN92238485 CN 92238485 CN 92238485 U CN92238485 U CN 92238485U CN 2141888 Y CN2141888 Y CN 2141888Y
- Authority
- CN
- China
- Prior art keywords
- hall element
- high pressure
- hall effect
- magnetizer
- effect displacement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 22
- 230000005355 Hall effect Effects 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 11
- 238000007789 sealing Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
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- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to a high pressure isolated Hall effect displacement transducer, the utility model comprises a magnetizer sliding core rod arranged in the sealed isolated sleeve of a non-magnetizer, two magnetizers arranged on the isolated sleeve, a magnetic steel, a Hall element and an amplifier circuit board which are all arranged on the left and right in a gap formed by the two magnetizers respectively. The core rod dose the axial motion in the sealed isolated sleeve to change the magnetic induction intensity of the surface of the Hall element. The voltage value which is in direct proportion to a displacement can be outputted when output signals are magnified. Thus, the utility model has the advantages of strong interference rejection, high frequency sound, high precision, simple structure, and reliable use. The high pressure isolated Hall effect displacement transducer is suitable for big displacement detecting of the surface of liquids in a high pressure container.
Description
The utility model relates to the variable-reluctance transducer of the direct Displacement Measurement of a kind of energy.
At home and abroad in the prior art field, displacement transducer of the same type has high pressure resistant differential transformer displace and slide bar type displacement transducer.High pressure resistant differential transformer displace, though its sealing property is good, its volume is big, the manufacturing process complexity, the post processing circuitry complexity is made comparatively difficulty of debugging; Though the slide bar type displacement transducer is simple in structure, need not post processing circuitry, but because of there being friction, contact and carbon film plate life-span are shorter, so poor reliability, and because lead-in wire and sealing problem are difficult to resolve determines, so this sensor is in the important events use and use frequent occasion regularly to change.
The purpose of this utility model is, adopt the magnetic conductor plug in closed outer magnetizer cage, to do axially-movable, thereby the magnetic induction density that changes the linear Hall circuit surface comes Displacement Measurement, solution is under high pressure, big displacement environment, have high frequency sound, high precision, simple in structure, overcome problems of the prior art.
In order to achieve the above object, the technical solution adopted in the utility model is, it has the magnetizer sliding mandrel that is contained in the non-magnetizer sealing isolating sleeve, two magnetic conductors are housed on the spacer sleeve in the non-magnetizer shell, in the gap that two magnetic conductor lower ends form, left and right magnet steel and Hall element, the amplifier circuit of being equipped with respectively.During Displacement Measurement, magnetizer sliding mandrel moves axially in closed non-magnetizer spacer sleeve, thereby change linear hall element surface induction intensity, the variable quantity of hall element output voltage is directly proportional with surface induction Strength Changes amount, output voltage is after amplifier circuit amplifies, and output is proportional to the magnitude of voltage of displacement.
The utility model compared with prior art advantage is, because plug is done axially-movable in enclosed spacer sleeve, change Hall element surface induction intensity, output signal is after amplifying, output is proportional to the magnitude of voltage of displacement, therefore has strong antijamming capability, high frequency sound, high precision, and simple in structure, use reliably, be applicable to the liquid level in the high pressure vessel, big displacement detecting.
Below in conjunction with accompanying drawing utility model is further described.
Fig. 1. the structural representation of this sensor;
Fig. 2. plug does not enter the magnetic loop when isolating in the trepanning;
Fig. 3. single Hall element Distribution of Magnetic Field;
Fig. 4. two Hall element Distribution of Magnetic Field;
Fig. 5. plug enters the magnetic loop when isolating in the trepanning;
Fig. 6. single Hall element amplifier circuit schematic diagram;
Fig. 7. two Hall element amplifier circuit schematic diagrams.
As shown in Figure 1, magnetizer sliding mandrel 1 is housed in the non-magnetizer sealing isolating sleeve 2, on the spacer sleeve 2 in the non-magnetizer shell 4 two magnetic conductors 6 are housed, in the gap that two magnetic conductor 6 lower ends form, the left and right magnet steel 5 that is equipped with respectively, with Hall element 7(can with single Hall element 7 ' or two Hall element 7 ', 7 "); amplifier circuit (available amplifier circuit 9 or add preamplifier circuit 8 again); and seal; extension line 12 is installed on the right end cap 10, and is bonding with bonding agents such as silicon rubber with left and right end cap 3,10.Shell 4 is fixing with spacer sleeve 2 by the gap that forms two magnetic conductor upper ends by trip bolt 13.Air relief cock 11 is used for making gases discharge in the spacer sleeve 2 when just adorning, and this plug also can.
Because plug 1 is isolated fully with Hall element, so under hyperbaric environment, sensor itself does not exist sealing, leakage problem, and the displacement scope is very big; As shown in Figure 2, when plug 1 was in high order end, magnet steel 5, two magnetic conductors 6, Hall elements 7 formed closed magnetic paths, and the magnet steel 5N utmost point is before magnetic conductor 6(), behind Hall element 7 and gap B, the magnetic conductor 6(), the magnet steel S utmost point forms the loop, this moment φ
A≈ 0, Hall element surface magnetic flux density maximum, φ
H≈ φ
t-φ
B, Hall element is among the magnetic field of presetting.In the formula: φ
A---the magnetic flux at axis hole place; φ
B---the magnetic flux at two magnetic conductor upper gap B places; φ
H---by the magnetic flux at Hall element place; φ
t---the magnetic flux of magnet steel surface.
Adopt single Hall element 7 ' be placed among N → S magnetic field, as shown in Figure 3, when the N magnetic flux density increased, Hall element 7 ' output voltage increased, otherwise output voltage reduces.Place Hall element with Fig. 3, temperature compensation is only carried out in amplifier circuit.If adopt two opposed methods of Hall element magnetic pole, then this moment, Hall element was exported maximum voltage value, because of with Hall element 7 " the S utmost point and 7 ' N utmost point place among N → S magnetic field; as shown in Figure 4; when the N magnetic flux density increases; Hall element 7 " S utmost point output voltage reduces, Hall element 7 ' N utmost point output voltage increases, difference voltage △ V increases.When reducing as N utmost point magnetic flux density, " S utmost point output voltage values increases Hall element 7, and Hall element 7 ' N utmost point output voltage values reduces, and difference voltage △ V reduces.Temperature compensation can also be carried out in the Hall element circuit.
When plug 1 was mobile from left to right, plug entered after the magnetic conductor 6, and the magnetic flux by Hall element 7 changes, i.e. φ
H≈ φ
t-φ
B-φ
A, flux path as shown in Figure 5, because of φ
ADirect ratio and plug 1 cross-sectional area, and cross-sectional area S=φ * L, in the formula: φ is plug 1 diameter, L is the length (being displacement) that enters in magnetic conductor 6 circular holes.Can get the Hall element surface magnetic flux density thus and be directly proportional with L, and hall element output voltage and φ
ABe directly proportional, promptly obtain output voltage and plug 1 displacement is proportional.
In order to make sensor output voltage begin by OV, promptly when plug 1 during at high order end output voltage be OV, when plug was mobile from left to right, output voltage increased gradually, output voltage is for maximum when reaching low order end.Therefore need to increase follow-up amplifying circuit.
As shown in Figure 6, adopt Hall element 7 ' and resistance R
1, R
2, R
3, R
4, R
5, R
6, thermo-compensator R
7, gain-adjusted potentiometer RP
1, resistance R
8, R
9, zero trimmer RP
2, integrated amplifier A
2, integrating capacitor C
1The amplifier circuit of forming 9, R
8, R
9, RP
2, R
4Form zeroing circuit, make amplifier when initial position, be output as OV, R
1, R
2, R
3Value decision amplifier least gain.This circuit is owing to adopt single Hall element, and its output amplitude is less, and effect temperature compensation is undesirable, and circuit gain is bigger, and circuit stability is corresponding also relatively poor.If adopt two opposed methods of Hall element magnetic pole as shown in Figure 7, Hall element 7 ', 7 " through resistance R
10, R
11, R
12, R
13, R
14, R
15, thermo-compensator R
16, gain-adjusted potentiometer RP
3, integrated amplifier A
1, integrating capacitor C
2The preamplifier circuit of forming 8.C
2Be used for filtering high frequency clutter, if regulate gain RP
3The time do not influence amplifier output zero point, R
10, R
11, R
12Value decision amplifier least gain.This preamplifier circuit 8 is connected with amplifier circuit 9, adopts two opposed methods of Hall element, and two Hall elements also have temperature compensation function each other.
Differential wave by Hall element output is amplified through differential amplifier, because of the Hall element performance can not be absolute consistent, therefore can be compensated by regulating enlargement factor.Second level amplifier has output and regulates also anti-phase zero point.Amplifier also can pass through machine zero zero point, promptly unclamps the relative position that trip bolt 13 usefulness change plug 1 and magnetic conductor 6.
Claims (3)
1, a kind of high-voltage isolation-type Hall effect displacement sensor, feature of the present utility model is, it comprises the magnetizer sliding mandrel [1] that is contained in the non-magnetic conduction spacer sleeve [2], on the spacer sleeve [2] in non-magnetizer shell [4] two magnetic conductors [6] are housed, in the gap that two magnetic conductors [6] lower end forms, left and right magnet steel [5] and Hall element, the amplifier circuit of being equipped with respectively.
2, Hall effect displacement sensor according to claim 1 is characterized in that, it comprises Hall element 7 ' with by resistance R
1, R
2, R
3, R
4, R
5, R
6, thermo-compensator R
7, gain-adjusted potentiometer RP
1, resistance R
8, R
9, zero trimmer RP
2, integrated amplifier A
2, integrating capacitor C
1The amplifier circuit of forming (9).
3, Hall effect displacement sensor according to claim 1 is characterized in that, it comprise Hall element 7 ', 7 ", through resistance R
10, R
11, R
12, R
13, R
14, R
15, thermo-compensator R
16, gain-adjusted potentiometer RP
3, integrated amplifier A
1, integrating capacitor C
2The preamplifier circuit of forming (8), and be connected with amplifier circuit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238485 CN2141888Y (en) | 1992-10-22 | 1992-10-22 | High pressure isolated Hall effect displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238485 CN2141888Y (en) | 1992-10-22 | 1992-10-22 | High pressure isolated Hall effect displacement transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2141888Y true CN2141888Y (en) | 1993-09-08 |
Family
ID=33779478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92238485 Expired - Fee Related CN2141888Y (en) | 1992-10-22 | 1992-10-22 | High pressure isolated Hall effect displacement transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2141888Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362311C (en) * | 2004-04-08 | 2008-01-16 | 株式会社小松制作所 | Displacement sensor |
| CN100376872C (en) * | 2006-03-28 | 2008-03-26 | 王允学 | Isolative linear displacement transmitter |
| CN107966094A (en) * | 2017-11-17 | 2018-04-27 | 山东大东联石油设备有限公司 | A kind of oil well pump displacement detection device for being placed in underground installation |
| CN109323727A (en) * | 2018-11-21 | 2019-02-12 | 邹明高 | The manufacturing method of metallic rod displacement speed sensor and metallic rod |
-
1992
- 1992-10-22 CN CN 92238485 patent/CN2141888Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362311C (en) * | 2004-04-08 | 2008-01-16 | 株式会社小松制作所 | Displacement sensor |
| CN100376872C (en) * | 2006-03-28 | 2008-03-26 | 王允学 | Isolative linear displacement transmitter |
| CN107966094A (en) * | 2017-11-17 | 2018-04-27 | 山东大东联石油设备有限公司 | A kind of oil well pump displacement detection device for being placed in underground installation |
| CN109323727A (en) * | 2018-11-21 | 2019-02-12 | 邹明高 | The manufacturing method of metallic rod displacement speed sensor and metallic rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |