CN1074034A - High-voltage isolation-type Hall effect displacement sensor - Google Patents
High-voltage isolation-type Hall effect displacement sensor Download PDFInfo
- Publication number
- CN1074034A CN1074034A CN 92112335 CN92112335A CN1074034A CN 1074034 A CN1074034 A CN 1074034A CN 92112335 CN92112335 CN 92112335 CN 92112335 A CN92112335 A CN 92112335A CN 1074034 A CN1074034 A CN 1074034A
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- China
- Prior art keywords
- hall element
- magnetizer
- displacement sensor
- hall effect
- magnetic
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 21
- 230000005355 Hall effect Effects 0.000 title claims abstract description 6
- 239000004020 conductor Substances 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000006698 induction Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 11
- 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
A kind of high-voltage isolation-type Hall effect displacement sensor, it includes 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 gap that two magnetic conductors form, a left side, part on the right side magnet steel and Hall element are not installed, amplifier circuit board, 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.
Description
The present invention 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 objective of the invention is to be, 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 present invention 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 present invention compared with prior art its 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 the present invention 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
AThe magnetic flux at-axis hole place; φ
BThe magnetic flux at-two magnetic conductor upper gap B places; φ
H-magnetic flux by the Hall element place; φ
tThe 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
AThe cross-sectional area of direct ratio and plug 1, 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 0V, promptly when plug 1 during at high order end output voltage be 0V, 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 0V, 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 invention 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 92112335 CN1028055C (en) | 1992-10-22 | 1992-10-22 | High-voltage isolation-type Hall effect displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112335 CN1028055C (en) | 1992-10-22 | 1992-10-22 | High-voltage isolation-type Hall effect displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074034A true CN1074034A (en) | 1993-07-07 |
| CN1028055C CN1028055C (en) | 1995-03-29 |
Family
ID=4945894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92112335 Expired - Fee Related CN1028055C (en) | 1992-10-22 | 1992-10-22 | High-voltage isolation-type Hall effect displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028055C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353143C (en) * | 2002-12-18 | 2007-12-05 | 皇家飞利浦电子股份有限公司 | Magnetic position sensor |
| CN101016687B (en) * | 2006-02-09 | 2010-05-12 | 海尔集团公司 | HALL sensor applied for determining washing machine barrel bias |
| CN104748661A (en) * | 2015-04-17 | 2015-07-01 | 兰州理工大学 | Differential transformer type displacement sensor |
| CN108955509A (en) * | 2018-09-19 | 2018-12-07 | 枣阳市米朗科技有限公司 | A kind of magnetic towed carbon membrane linear displacement sensor with high sealing performance |
| CN110375975A (en) * | 2019-07-25 | 2019-10-25 | 深圳市阿尔艾富信息技术股份有限公司 | A kind of disconnected spring detection circuit of track damping spring |
| CN114689090A (en) * | 2022-03-28 | 2022-07-01 | 杭州电子科技大学 | Self-adaptive compensation method and circuit for Hall bar array output bias |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7302940B2 (en) * | 2005-09-26 | 2007-12-04 | Cummins, Inc | Variable reluctance position sensor |
-
1992
- 1992-10-22 CN CN 92112335 patent/CN1028055C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353143C (en) * | 2002-12-18 | 2007-12-05 | 皇家飞利浦电子股份有限公司 | Magnetic position sensor |
| CN101016687B (en) * | 2006-02-09 | 2010-05-12 | 海尔集团公司 | HALL sensor applied for determining washing machine barrel bias |
| CN104748661A (en) * | 2015-04-17 | 2015-07-01 | 兰州理工大学 | Differential transformer type displacement sensor |
| CN108955509A (en) * | 2018-09-19 | 2018-12-07 | 枣阳市米朗科技有限公司 | A kind of magnetic towed carbon membrane linear displacement sensor with high sealing performance |
| CN108955509B (en) * | 2018-09-19 | 2024-04-09 | 湖北米朗科技股份有限公司 | Magnetic drag type carbon film linear displacement sensor with high sealing performance |
| CN110375975A (en) * | 2019-07-25 | 2019-10-25 | 深圳市阿尔艾富信息技术股份有限公司 | A kind of disconnected spring detection circuit of track damping spring |
| CN114689090A (en) * | 2022-03-28 | 2022-07-01 | 杭州电子科技大学 | Self-adaptive compensation method and circuit for Hall bar array output bias |
| CN114689090B (en) * | 2022-03-28 | 2024-04-09 | 杭州电子科技大学 | Self-adaptive compensation method and circuit for output bias of Hall strip array |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1028055C (en) | 1995-03-29 |
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