CN1940465A - Magnetized object displacement detection method and displacement sensor - Google Patents
Magnetized object displacement detection method and displacement sensor Download PDFInfo
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- CN1940465A CN1940465A CN 200510047327 CN200510047327A CN1940465A CN 1940465 A CN1940465 A CN 1940465A CN 200510047327 CN200510047327 CN 200510047327 CN 200510047327 A CN200510047327 A CN 200510047327A CN 1940465 A CN1940465 A CN 1940465A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 230000005291 magnetic effect Effects 0.000 claims abstract description 103
- 230000005355 Hall effect Effects 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000012806 monitoring device Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The invention relates to a structural design for realizing displacement detection by using a Hall device, in particular to a displacement detection method of a magnetized object and a displacement sensor, which adopt a mode of placing the Hall device at the central position of a magnetic field, namely the area with the weakest magnetic field intensity to detect a detected system; the magnetic field can be formed by two cylindrical structure magnetic bodies or an annular structure magnetic body, and provides a stable magnetic field environment for the Hall device, so that the linear Hall device can normally work in the magnetic field environment; the Hall device has good linear analog voltage output, namely the output voltage of the Hall device is linearly changed along with the change of the magnetic field strength within a certain magnetic field strength. The control and monitoring by the method of the invention can obtain different displacement change values between the measured objects according to different voltage signals. The formed Hall displacement sensor realizes the integration of a Hall device and a magnetic system, and brings great convenience for use and production.
Description
Technical field
The present invention relates to detect magnetic field and change technique thereof, specifically describing is a kind of ohject displacement detection method and displacement transducer of being magnetized, and its uses hall device to realize displacement detecting, is used to detect the variation of the displacement of the various objects that are magnetized.
Background technology
Hall device is a kind of Magnetic Sensor.Can detect magnetic field and variation thereof with them, can in the various occasions relevant, use with magnetic field.At present, the displacement transducer that uses hall device to constitute all is that the working current of hall device remains unchanged, and it is moved in a uniform gradient magnetic, and the Hall voltage value size of its output is only decided by its displacement in this magnetic field.Fig. 1-1,1-2 illustrate at present typical 2 kinds of field systems that produce gradient magnetics and hall device composition displacement transducer structural drawing is set.Wherein: Fig. 1-1 shows as the vertical direction moving structure between field system and the hall device; Fig. 1-2 shows as parallel direction moving structure between field system and the hall device.They are fixed on the system under test (SUT), can constitute hall displacement transducer.The hall displacement transducer that adopts this kind method to be constituted requires to make up a field system in system under test (SUT), and hall device is moved in certain magnetic field range.Therefore different systems under test (SUT) need make up the different magnetic field system, makes the versatility of hall displacement transducer poor, reusability is low, and be unfavorable for producing in batches, single cost is higher.
Summary of the invention
The object of the invention provides that a kind of versatility is good, reusability is high, be magnetized ohject displacement detection method and the displacement transducer being convenient to produce in batches.
To achieve these goals, technical scheme of the present invention:
A kind of ohject displacement detection method that is magnetized:
It is that the mode in the most weak zone of magnetic field intensity detects system under test (SUT) that employing places the magnetic field center position with hall device, according to different voltage signals draw survey different change in displacement values between the object;
Wherein: described magnetic field makes linear hall-effect device operate as normal therein for hall device provides stable magnetic field environment; Hall device adopts the hall device with the output of linear analogue voltage; Described magnetic field can constitute for two column construction magnetics, can also be made of the loop configuration magnetic.
A kind of ohject displacement sensor that is magnetized comprises:
One magnetic field for hall device provides a stable magnetic field environment, makes linear hall-effect device operate as normal therein;
One hall device has linear analogue voltage output, that is: its output voltage in certain magnetic field intensity with the linear variation of the intensity in magnetic field; And being installed in the magnetic field center position is the most weak zone of magnetic field intensity (link to each other with ground with power supply respectively by lead, and export analog voltage signal), constitutes hall displacement transducer, is installed on the system under test (SUT).
Wherein: described magnetic field can be two column construction magnetics, and an end is that the N utmost point, the other end are the S utmost point, and linear hall-effect device places between the two cylindricality magnetics; Preferably place the central area between the two cylindricality magnetics;
Described magnetic field can also be a loop configuration magnetic, and a side is that the N utmost point, opposite side are the S utmost point, and linear hall-effect device places loop configuration magnetic center.
Principle of work of the present invention: the displacement sensor structure that the field system of described two kinds of stabilizing magnetic fields that structure produces and linear hall-effect device are formed is fixed on the system under test (SUT), constitutes a novel hall displacement transducer.Its principle is that linear hall-effect device is fixed the magnetic field center position that two kinds of structures produce respectively, make hall device and field system constitute one (magnetic field intensity of its magnetic field center position is the most weak), as its various objects that are magnetized near or away from the time, because described magnetic field produces magnetization phenomenon in the various objects that are magnetized, thereby in the object that is magnetized, form reverse with it magnetic field.So the change of magnetic field strength maximum of center position, the output voltage variation range of hall device is also maximum, and testing circuit is with the easiest change in displacement that detects it.
The present invention has following advantage:
Adopt the hall displacement transducer that the inventive method constituted, realized that hall device and field system constitute one, it need not to build a field system in system under test (SUT), and hall device need not move in certain magnetic field range.Therefore same hall displacement transducer can be used in the different systems under test (SUT) and work, and does not need to make up the different magnetic field system, makes the versatility of hall displacement transducer good, reusability is high, and be beneficial to batch process, single cost is low.
Description of drawings
Fig. 1-the 1st, the field system synoptic diagram (vertical direction moving structure between field system and the hall device) of generation gradient magnetic in the prior art.
Fig. 1-2 is the field system synoptic diagram (parallel direction moving structure between field system and the hall device) that produces gradient magnetic in the prior art.
Fig. 2 is the structured flowchart of one embodiment of the invention.
Fig. 3 is the practical principle figure of another embodiment of the present invention.
Embodiment
The present invention is described in more detail below in conjunction with accompanying drawing.
The present invention's ohject displacement detection method that is magnetized is: it is the most weak zone of magnetic field intensity that hall device is placed the magnetic field center position; Wherein: magnetic field makes linear hall-effect device operate as normal therein for hall device provides stable magnetic field environment; Hall device adopts the hall device with the output of linear analogue voltage;
The described magnetic field of present embodiment is that two column construction magnetics constitute.
The described ohject displacement sensor that is magnetized as shown in Figure 2, comprising:
One magnetic field is made of two column construction magnetics, and an end is that the N utmost point, the other end are the S utmost point;
One hall device (present embodiment adopt chip SS49E) has the output of linear analogue voltage, that is: its output voltage in certain magnetic field intensity with the linear variation of the intensity in magnetic field; And being installed in the magnetic field center position is the most weak zone of magnetic field intensity, and present embodiment places between the two cylindricality magnetics, that is: the mid point of center line between the two cylindricality magnetic center lines; Exit has three: 1 for the power supply input end, with direct supply (+3V-+6V) end is connected; 2 is the analog voltage signal output terminal, is connected with the control monitoring device analog input end of different system; 3 is power supply ground end, is connected with system power supply ground end.Constitute hall displacement transducer, be installed on the system under test (SUT).
This field system has been realized the most weak designing requirement of magnetic field intensity of magnetic field structure center, for hall device provides a stable magnetic field environment, makes linear hall-effect device operate as normal therein.Linear hall-effect device is used to detect the variation of the magnetic field intensity of the magnetic field structure center that is constituted, and the voltage that change of magnetic field strength is converted into linear change is exported to the control monitoring device.The use of such displacement transducer does not need to build a field system in system under test (SUT), hall device need not move in certain magnetic field range yet.
Embodiment 2
Difference from Example 1 is:
As shown in Figure 3, described magnetic field is a loop configuration magnetic, and a side is that the N utmost point, opposite side are the S utmost point, and linear hall-effect device places loop configuration magnetic center.4 is annular magnetic steel in the present embodiment, for hall device provides a stable magnetic field environment.Linear hall-effect device also adopts chip SS49E, it is fixed in the center of annular magnetic steel 4, constitute one with annular magnetic steel 4, be used to detect the change of magnetic field strength of its center, and the variation of magnetic field intensity is converted into the form of analog voltage signal, and outputs it to the control monitoring device.The power supply input end 1 of linear hall-effect device and direct supply (+3V-+6V) end is connected; The power supply ground end 3 of linear hall-effect device is connected with system power supply ground end; The analog voltage signal output terminal 2 of linear hall-effect device is connected with the control monitoring device analog input end of different system.
The course of work of the present invention is: when the relative annular magnetic steel of the various objects that are magnetized produces different change in displacement, be fixed in linear hall-effect device in the annular magnetic steel with the variation of its detected magnetic field intensity, and export to the control monitoring device with the analog voltage signal form by analog voltage signal output terminal 2.Control monitoring will draw the different change in displacement value between object and the annular magnetic steel according to different voltage signals.
By the hall displacement transducer that the inventive method constituted, realized the integrated of hall device and magnetic system, the great facility of bringing for use.
Claims (7)
1. ohject displacement detection method that is magnetized, it is characterized in that: adopting hall device is placed the magnetic field center position is that the mode in the most weak zone of magnetic field intensity detects system under test (SUT), draws the different change in displacement values between the object surveyed according to different voltage signals.
2. by the described ohject displacement detection method that is magnetized of claim 1, it is characterized in that: described hall device adopts the hall device with the output of linear analogue voltage.
3. by the described ohject displacement detection method that is magnetized of claim 1, it is characterized in that: described magnetic field can constitute for two column construction magnetics, can also be made of the loop configuration magnetic.
4. ohject displacement sensor that is magnetized is characterized in that comprising:
One magnetic field for hall device provides a stable magnetic field environment, makes linear hall-effect device operate as normal therein;
One hall device has linear analogue voltage output, that is: its output voltage in certain magnetic field intensity with the linear variation of the intensity in magnetic field; And being installed in the magnetic field center position is the most weak zone of magnetic field intensity, constitutes the hall displacement transducer of integral structure, is installed on the system under test (SUT).
5. by the described ohject displacement sensor that is magnetized of claim 4, it is characterized in that: described magnetic field can be two column construction magnetics, and an end is that the N utmost point, the other end are the S utmost point, and linear hall-effect device places between the two cylindricality magnetics.
6. by the described ohject displacement sensor that is magnetized of claim 5, it is characterized in that: preferably place the central area between the two cylindricality magnetics.
7. by the described ohject displacement sensor that is magnetized of claim 4, it is characterized in that: described magnetic field can also be a loop configuration magnetic, and a side is that the N utmost point, opposite side are the S utmost point, and linear hall-effect device places loop configuration magnetic center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047327 CN1940465A (en) | 2005-09-30 | 2005-09-30 | Magnetized object displacement detection method and displacement sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047327 CN1940465A (en) | 2005-09-30 | 2005-09-30 | Magnetized object displacement detection method and displacement sensor |
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| CN1940465A true CN1940465A (en) | 2007-04-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514907B (en) * | 2008-02-19 | 2010-11-10 | 中国国际海运集装箱(集团)股份有限公司 | Magnetic induction distance detector |
| CN107421432A (en) * | 2017-06-16 | 2017-12-01 | 上海同驭汽车科技有限公司 | A kind of Novel Non-Contact Type Hall Displacement Sensor |
| CN110673333A (en) * | 2019-08-31 | 2020-01-10 | 广东联大光电有限公司 | Projection galvanometer capable of correcting amplitude in real time and amplitude correcting method thereof |
-
2005
- 2005-09-30 CN CN 200510047327 patent/CN1940465A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514907B (en) * | 2008-02-19 | 2010-11-10 | 中国国际海运集装箱(集团)股份有限公司 | Magnetic induction distance detector |
| CN107421432A (en) * | 2017-06-16 | 2017-12-01 | 上海同驭汽车科技有限公司 | A kind of Novel Non-Contact Type Hall Displacement Sensor |
| CN107421432B (en) * | 2017-06-16 | 2023-12-01 | 上海同驭汽车科技有限公司 | Non-contact Hall displacement sensor |
| CN110673333A (en) * | 2019-08-31 | 2020-01-10 | 广东联大光电有限公司 | Projection galvanometer capable of correcting amplitude in real time and amplitude correcting method thereof |
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