CN100432677C - Acceleration sensor - Google Patents
Acceleration sensor Download PDFInfo
- Publication number
- CN100432677C CN100432677C CNB2006100040748A CN200610004074A CN100432677C CN 100432677 C CN100432677 C CN 100432677C CN B2006100040748 A CNB2006100040748 A CN B2006100040748A CN 200610004074 A CN200610004074 A CN 200610004074A CN 100432677 C CN100432677 C CN 100432677C
- Authority
- CN
- China
- Prior art keywords
- magnetic
- housing
- float
- pick
- fluid
- 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
Images
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
This invention relates to one acceleration sensor, which puts one magnetic floater into one non-magnetic materials to form full magnetic fluid non-magnetic chamber, wherein, due to the magnetic floater self magnetic gradient, the magnetic fluid is under magnetic gradient to generate one force to make the floater float in the magnetic fluid and keep middle balance position along non-magnetic chamber radium; when there is acceleration, the magnetic floater move to output acceleration result signals through test device.
Description
Technical field
The present invention relates to the production and the application of acceleration transducer, relate in particular to a kind of acceleration transducer based on magnetic fluid.
Background technology
At present, all commonly used in many technical fields to acceleration transducer, as motor racing control, automotive test, household electrical appliances, game products, office automation, GPS, PDA, mobile phone, shock detection, building instrument and experimental facilities or the like.
Existing acceleration transducer has following several structure usually.
A kind of is that steel ball is placed in the housing with the state that moves freely, according to the mechanicalness vibration that applies from the outside, steel ball relatively moves, and then the switch sections that designs by predetermined configurations according to this displacement produces on-off output, and this structure mainly is used as a kind of acceleration switch.
Another kind of acceleration transducer adopts cantilever beam structure basically, comprising with the stiff end that is fixedly installed on the holding components on the substrate is the semi-girder that the elastic deformation motion of reciprocating action is done at the center, determines extraneous acceleration magnitude with the mode of the position of detecting semi-girder.Detection mode handlebar semi-girder commonly used detects the variation of capacitance as the movable plate electrode of capacitance electrode, obtains the position of semi-girder, thereby obtains extraneous acceleration.
Above-mentioned acceleration transducer all has Mechanical Contact, has mechanically deform and wearing and tearing, and once making the shortcoming that the back just can not change material.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of acceleration transducer, core is based on the acceleration transducer of magnetic fluid, has high precision, wide-range, high reliability, intelligent, characteristics such as the life-span is long.
The objective of the invention is to be achieved through the following technical solutions:
A kind of acceleration transducer comprises: non-magnetic housing, magnetic fluid, magnetic float, magnetic part and pick-up unit, wherein:
Non-magnetic housing: be the closed container that nonmagnetic substance constitutes, inside is full of magnetic fluid;
Magnetic float: be that magnetic material constitutes, be suspended in the magnetic fluid in the non-magnetic housing by the action of a magnetic field;
Magnetic part: constitute by magnetic material, be positioned at the outer end of magnetic float two magnetic poles, be located at the non-magnetic housing outside;
Pick-up unit: be located at the outside of non-magnetic housing, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal.
Described acceleration transducer also comprises the magnetic field control device, is used to change the viscosity of magnetic fluid, and the displacement of control magnetic float specifically comprises:
Control coil: be wound in the non-magnetic housing outside, produce magnetic field, change the viscosity of magnetic fluid, the displacement of control magnetic float by impressed current; Perhaps also comprise,
The coil stationary cover: be placed in the non-magnetic housing outside, control coil is wound in the coil stationary cover outside.
Described pick-up unit comprises:
Axle head pick-up unit: be located at the outside of the two ends non-magnetic housing of magnetic float magnetic pole, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal; And/or,
Circumferential pick-up unit: be located at the outside of the circumferential non-magnetic housing of the non-pole orientation of magnetic float, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal.
Described axle head pick-up unit comprises the magnetic displacement detecting element: adopt Hall element, be positioned at the outer end of magnetic float two magnetic poles, be located at the non-magnetic housing outside, detect the displacement of magnetic float, output acceleration detection consequential signal; And can be provided with isolated component between described magnetic displacement detecting element and magnetic part;
Perhaps,
Described circumferential pick-up unit comprises circumferential displacement detecting element, and described circumferential displacement detecting element comprises that two groups are detected electric capacity, and axially left-right symmetric is installed on the lateral surface of non-magnetic housing; Wherein:
Described every group of detection electric capacity comprises two semicircles or flat pole plate, and two axial symmetries of pole plate are installed on the lateral surface of non-magnetic housing.
Described pick-up unit also comprises signal processing module, specifically is used for:
With the differential connection of magnetic displacement detecting element, the acceleration detection consequential signal that detects is optimized processing; Perhaps,
Detect capacitance difference with two groups and be dynamically connected, the acceleration detection consequential signal that detects is optimized processing.
Described non-magnetic housing comprises non magnetic urceolus and non magnetic end cap, wherein:
Non magnetic urceolus both ends open, two ends are installed a non magnetic end cap respectively and are formed non-magnetic housing, and inside is full of magnetic fluid; Perhaps,
Non magnetic urceolus one end opening, opening part are installed a non magnetic end cap and are formed non-magnetic housing, and inside is full of magnetic fluid; Perhaps,
Also be provided with sealing ring between described non magnetic urceolus and the non magnetic end cap.
The outside, described non-magnetic housing two ends is provided with groove, as then being located on the non magnetic end cap for non magnetic end cap, is used for the installation and measuring device; Perhaps,
Described non-magnetic housing is cylindrical, and outer wall axially middle part is provided with circumferential ring platform, and outer wall is provided with axial boss along the circumferential symmetric position of axis direction; The lateral surface of non-magnetic housing is separated into four zones is used for the installation and measuring device; Perhaps,
Described non-magnetic housing is a rectangular parallelepiped, and two opposite groups outer wall wherein one group of two sides axially is provided with circumferential boss in the middle part; The a pair of relative lateral surface of non-magnetic housing is separated into four zones is used for the installation and measuring device.
Described magnetic fluid is one or more the combination in magnetic fluid, magnetic compound fluid or the magnetic rheological body; Perhaps,
Described magnetic float is elongated cylindrical, sphere, elliposoidal or rectangle.
Described acceleration transducer also comprises interior chuck, and described non-magnetic housing, magnetic fluid, magnetic float and pick-up unit all are located in the interior chuck; Also can be located at outside the interior chuck in described magnetic field control device can be located in the chuck;
Chuck sleeve and gland in chuck specifically comprises in described, gland and interior chuck sleeve are fixedly installed in pick-up unit in the interior chuck by bolt;
The coil stationary cover can be one with interior chuck sleeve when described magnetic field control device was located at outside interior chuck.
Described acceleration transducer also comprises shell body, described non-magnetic housing, magnetic fluid, magnetic float and pick-up unit all are located in the shell body inner chamber, shell body specifically comprises outer sleeve and outer end cap, outer sleeve and outer end cap are by bolt, and described outer end cap is provided with installs leg and/or mounting hole.
As seen from the above technical solution provided by the invention, a kind of acceleration transducer of the present invention is the inside that a magnetic float is positioned over the non-magnetic housing of the full magnetic fluid that a non-magnetic material forms, because the magnetic field gradient that magnetic float self is had, magnetic fluid is under this magnetic field gradient effect, produce an acting force, make magnetic float be suspended in the magnetic fluid, and upwards keep the intermediate equilibria position in the footpath of non-magnetic housing; When having acceleration, the magnetic float position is moved, by the change in displacement of pick-up unit detection magnetic float, and output acceleration detection consequential signal.Novel on the structure of the present invention, avoided traditional cantilever beam structure, the characteristic in magnetic field, the magnetic float that will have gradient magnetic suspends, and can eliminate the influence of radial effect simultaneously; Magnetic float is in other mechanical part does not have direct contact condition, make that its reliability height, life-span are long and in detection, take special multimedium crack with seam combine detection electric capacity and magnetic displacement detecting element simultaneously, to magnetic moving mass displacement detecting, and all take differential mode, eliminate various interference, possess the high precision characteristics; Utilize magnetic fluid viscosity controllability characteristics in addition among the present invention, by the control coil electric current is changed, change the magnetic field intensity that is applied on the magnetic fluid, reach the purpose of control magnetic fluid viscosity, thereby can reach control, realize the characteristics of wide-range the acceleration transducer range.Have high precision, wide-range, high reliability, intelligent, characteristics such as the life-span is long.
Description of drawings
Fig. 1 is the three-dimensional exploded perspective view of a kind of acceleration transducer of the present invention;
Fig. 2 is the structural representation of a kind of acceleration transducer of the present invention;
Fig. 3 is the structural representation of the non magnetic urceolus of a kind of acceleration transducer of the present invention;
Fig. 4 is a kind of working state figure of a kind of acceleration transducer of the present invention.
Embodiment
Core of the present invention is the inside that a magnetic moving component (just magnetic float 1) is positioned over the closed container (non-magnetic housing just) of the full magnetic fluid 14 that a non-magnetic material forms, because the magnetic field gradient that magnetic float 1 self is had, magnetic fluid 14 is under this magnetic field gradient effect, produce an acting force, make magnetic float 1 be suspended in the magnetic fluid 14, and upwards keep the intermediate equilibria position in the footpath of non-magnetic housing; When having acceleration, magnetic float 1 position is moved, by the change in displacement of pick-up unit detection magnetic float, and output acceleration detection consequential signal.
The structure of the specific embodiment of the present invention such as Fig. 1 and shown in Figure 2: the most basic structure of described acceleration transducer comprises: non-magnetic housing, magnetic fluid 14, magnetic float 1, magnetic part 9 and pick-up unit, wherein:
Non-magnetic housing is the closed container that nonmagnetic substance constitutes, and inside is full of magnetic fluid 14; Non-magnetic housing comprises non magnetic urceolus 4 and non magnetic end cap 13, non magnetic urceolus 4 both ends opens in this example, and two ends are installed a non magnetic end cap 13 respectively and are formed non-magnetic housing, and inside is full of magnetic fluid 14.Sometimes non magnetic urceolus 4 can be an end opening under the situation that processing technology allows, and opening part is installed a non magnetic end cap 13 and formed non-magnetic housing, and inside is full of magnetic fluid 14.In order to realize airtight (mainly being sealing) of non-magnetic housing better, also be provided with sealing ring 12 between described non magnetic urceolus 3 and the non magnetic end cap 13 simultaneously, prevent that magnetic fluid 14 from leaking.
The outside, non-magnetic housing two ends in this example is provided with groove, and just non magnetic end cap 13 is provided with groove, is used for the installation and measuring device.
Non-magnetic housing in this example is cylindrical as shown in Figure 3, being shaped as of just non magnetic urceolus 3 is cylindrical, interior hollow, both ends open, and axially be provided with along circumferential ring platform 16 at the middle part at the outer wall of non magnetic urceolus 3, be provided with axial boss 17 along the circumferential symmetric position of axis direction at the outer wall of non magnetic urceolus 3; The lateral surface of non magnetic urceolus 3 is separated into four zones is used for the installation and measuring device.Certainly, not getting rid of described non-magnetic housing is rectangular parallelepiped, just non magnetic urceolus 3 be shaped as rectangular parallelepiped, interior hollow, both ends open, rectangular parallelepiped two opposite groups outer wall wherein one group of two sides axially are provided with along circumferential circumferential boss at the middle part; The a pair of relative lateral surface of non magnetic urceolus 3 is separated into four zones is used for the installation and measuring device.
Magnetic float 1 is that magnetic material constitutes, and is suspended in the magnetic fluid 14 in the non-magnetic housing by the action of a magnetic field; Magnetic float 1 is shaped as elongated cylindrical, sphere, elliposoidal or rectangle etc.
Magnetic part 9 is made of magnetic material, is positioned at the outer end of magnetic float two magnetic poles, is located at the non-magnetic housing outside;
Pick-up unit: the pick-up unit in this example is the axle head pick-up unit, is located at the outside of the two ends non-magnetic housing of magnetic float 1 magnetic pole, is used to detect the change in displacement of magnetic float 1, output acceleration detection consequential signal; Described axle head pick-up unit comprises that magnetic displacement detecting element 7 adopts Hall element, is positioned at the outer end of 1 liang of magnetic pole of magnetic float, is located at the non-magnetic housing outside, detects the displacement of magnetic float 1, output acceleration detection consequential signal; And 9 of described magnetic displacement detecting element 7 and magnetic parts can be provided with isolated component 8; Avoid 9 pairs of magnetic displacement detecting elements 7 of magnetic part to cause interference.
Magnetic displacement detecting element 7, isolated component 8 and magnetic part 9 place the groove on the above-mentioned non magnetic end cap 13.
Pick-up unit in this example can also adopt circumferential pick-up unit, as in order to measure acceleration more accurately, except that the axle head pick-up unit, axle head pick-up unit and circumferential pick-up unit can be set simultaneously also.
Described circumferential pick-up unit is located at the outside of the circumferential non-magnetic housing of the non-pole orientation of magnetic float, is used to detect the change in displacement of magnetic float 1, output acceleration detection consequential signal.
Described circumferential pick-up unit comprises circumferential displacement detecting element, described circumferential displacement detecting element comprises that two groups are detected electric capacity 6, every group of detection electric capacity 6 comprises two semicircle pole plates in this example, totally four semicircle pole plates, four zones that the lateral surface that is installed on cylindrical non-magnetic urceolus 3 respectively is separated into by axial boss 17 and circumferential ring platform 16, axial boss 17 plays location and the effect of isolating here with circumferential ring platform 16.
Non-magnetic housing with respect to above-mentioned rectangular shape, every group is detected electric capacity 6 and comprises two pasting plates, totally four pasting plates, four zones that a pair of relative lateral surface that is installed on non magnetic urceolus 3 respectively is separated into by circumferential boss, circumferentially boss plays location and the effect of isolating here.
Described pick-up unit also comprises signal processing module, specifically is used for the differential connection of magnetic displacement detecting element, and the acceleration detection consequential signal that detects is optimized processing; Perhaps, detect capacitance difference with two groups and be dynamically connected, the acceleration detection consequential signal that detects is optimized processing.Specifically partly discuss in principle.
In order to finish surveying work better, the acceleration transducer of the above also comprises the magnetic field control device on the basis of this example, be used to change the viscosity of magnetic fluid, the displacement of control magnetic float, comprise that specifically control coil 3 is wound in the non-magnetic housing outside, produce magnetic field by impressed current, change the viscosity of magnetic fluid, the displacement of control magnetic float; Described control coil 3 is wound in coil stationary and overlaps 2 outsides, and coil stationary cover 2 is in the non-magnetic housing outside.
Certain described acceleration transducer also comprises interior chuck, and above-mentioned non-magnetic housing, magnetic fluid 14, magnetic float 1, magnetic part 9 all are located in the interior chuck with pick-up unit; Chuck sleeve and gland 10 in chuck specifically comprises in described, gland 10 and interior chuck sleeve are by bolt, and gland 10 contacts with magnetic part 9 in magnetic displacement detecting element 7, isolated component 8 and the magnetic part 9 tight grooves on non magnetic end cap 13.Also can be located at outside the interior chuck in described magnetic field control device can be located in the chuck; In this example the magnetic field control device be located at outside interior chuck, interior chuck sleeve is coil stationary cover 2 just.
Install for convenience, described acceleration transducer also comprises shell body, described non-magnetic housing, magnetic fluid 14, magnetic float 1, magnetic part 9 all are located in the shell body inner chamber with pick-up unit, shell body specifically comprises outer sleeve 5 and outer end cap 11, outer sleeve 5 passes through bolt with outer end cap 11, and described outer end cap 11 is provided with installs leg and/or mounting hole.The while housing is made up of electromagnetic shielding material, and whole acceleration transducer is positioned at wherein, avoids the interference of external magnetic field to its inside sensing element, and eliminates the influence of environment to external world of internal magnetic field element.
The principle of work of acceleration transducer of the present invention is as follows:
Magnetic float 1 is positioned over non-magnetic housing inside, and magnetic float 1 is subjected to the buoyancy of gravity and magnetic fluid 14 on the one hand; On the other hand, because magnetic float 1 self can produce magnetic field gradient, and magnetic fluid 14 is under this magnetic field gradient effect, its monopolizing characteristic is arranged, to produce an acting force, and make magnetic float 1 be suspended in the magnetic fluid 14, and upwards keep the intermediate equilibria position in the footpath of cylindrical non-magnetic cavity; When the acceleration that exists radially, make magnetic float 1 position radially be offset, thereby its magnetic field gradient changes, will produce a restoring force and make magnetic float 1 recover the intermediate equilibria position immediately, thereby, eliminate the influence of radial acceleration to radially acceleration is insensitive.
Lay magnetic part 9 in the non magnetic end cap 13, it is opposite that the polarity of their polarity and magnetic float 1 keeps, about have one respectively, they make magnetic float 1 be in the effect of magnetic pole mutual expelling force all the time.Do the time spent not being subjected to extraneous axial acceleration, magnetic float 1 remains on the axial middle position of cylindrical non-magnetic cavity.Do the time spent when being subjected to extraneous axial acceleration, because inertia effect, magnetic float 1 axially has movement tendency with respect to the cylindrical non-magnetic cavity, and can produce certain displacement.The displacement meeting of magnetic moving component 1 causes the change of the acting force of 9 pairs of magnetic moving components 1 of magnetic part, it will be bigger being subjected to repulsive force the closer to an end of magnetic part 9, and more be subjected to repulsive force away from an end of magnetic part 9 will be littler, under the state shown in Fig. 4, the repulsive force that left end is subjected to reduces, the repulsive force that the right is subjected to increases, thereby the trend that can make magnetic float 1 oriented middle position motion, when extraneous acceleration acting force equals 9 pairs of magnetic float 1 repulsive forces of magnetic part, reach an equilibrium position.Obtain the size that this displacement can be learnt axial extraneous acceleration by detection.
In this example, magnetic displacement detecting element 7 adopts Hall element, the moving displacement of magnetic float 1 will accurately detect by Hall element, employing is with the differential connection of the Hall element of the right and left, eliminate some undesired signals, offset the strong signal of the high-intensity magnetic field of magnetic part 9 generations simultaneously, thereby help the detection of weak signal, improve accuracy of detection the Hall element generation.
In this example, also adopt special shape capacitance detecting mode to detect the moving displacement of magnetic float 1 simultaneously.Be equipped with between 6, two groups of electric capacity of the semicircle combine detection electric capacity in two groups of multimediums crack with seam and utilize the axial boss of cylindrical non-magnetic chamber outer wall and circumferential ring platform location and isolation between capacitor plate at cylindrical non-magnetic cavity skin.When magnetic float 1 moves in the cylindrical non-magnetic cavity, will cause that the two dielectric content that detect electric capacity 6 inside change, thereby change the capacitance that detects electric capacity.The detection capacitance difference of the right and left is dynamically connected, eliminates some undesired signals, improve accuracy of detection.
Be nested with coil stationary cover 2 at the cylindrical non-magnetic chamber outer wall, uniform winding control coil 3 on the coil stationary cover 2, this control coil 3 will produce magnetic field by impressed current control, thereby the viscosity to magnetic fluid 14 plays control action, the control of the viscosity of magnetic fluid 14 can be controlled the size of the moving displacement of magnetic float 1, thereby can realize reaching the wide-range effect to measuring the control of range.
Therefore the present invention has following advantage and beneficial effect:
1, novel on the structure of the present invention, avoided traditional cantilever beam structure, be to the innovation on the existing acceleration sensor structure principle;
2, the present invention adopts magnetic fluid as the pith in the acceleration sensor structure, make full use of its monopolizing characteristic, utilize it under the gradient magnetic effect, can produce the characteristic of acting force, the magnetic moving component that will have gradient magnetic suspends, and can eliminate the influence of radial effect simultaneously;
3, the moving mass among the present invention is a magnetic float 1, produce the magnetic pole mutual expelling force by the magnetic part that is provided with at two ends in the acceleration transducer, keep moving mass in axial motion, moving mass is in other mechanical part does not have direct contact condition, makes its reliability height, life-span long;
4, the principle of taking among the present invention makes the acceleration sensor accuracy height, and takes special multimedium crack with seam combine detection electric capacity and magnetic displacement detecting element in detection simultaneously, to magnetic moving mass displacement detecting, and all take differential mode, and eliminate various interference, possess the high precision characteristics;
5, utilize magnetic fluid viscosity controllability characteristics among the present invention, by to coil current control, change the magnetic field intensity that is applied on the magnetic fluid, reach the purpose of control magnetic fluid viscosity, thereby can reach control, realize the characteristics of wide-range the acceleration transducer range.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (11)
1, a kind of acceleration transducer is characterized in that, comprising: non-magnetic housing, magnetic fluid, magnetic float, magnetic part and pick-up unit, wherein:
Non-magnetic housing: be the closed container that nonmagnetic substance constitutes, inside is full of magnetic fluid;
Magnetic float: be that magnetic material constitutes, be suspended in the magnetic fluid in the non-magnetic housing by the action of a magnetic field;
Magnetic part: constitute by magnetic material, be positioned at the outer end of magnetic float two magnetic poles, be located at the non-magnetic housing outside;
Pick-up unit: be located at the outside of non-magnetic housing, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal;
The outside, described non-magnetic housing two ends is provided with groove, be used for the installation and measuring device, described non-magnetic housing is cylindrical, outer wall axially middle part is provided with circumferential ring platform, outer wall is provided with axial boss along the circumferential symmetric position of axis direction, the lateral surface of non-magnetic housing is separated into four zones is used for the installation and measuring device;
Described non-magnetic housing is provided with the magnetic field control device outward, be used to change the viscosity of magnetic fluid, the displacement of control magnetic float, described magnetic field control device comprises control coil, described control coil is wound in the described non-magnetic housing outside, produce magnetic field by impressed current, change the viscosity of magnetic fluid, the displacement of control magnetic float.
2, a kind of acceleration transducer is characterized in that, comprising: non-magnetic housing, magnetic fluid, magnetic float, magnetic part and pick-up unit, wherein:
Non-magnetic housing: be the closed container that nonmagnetic substance constitutes, inside is full of magnetic fluid;
Magnetic float: be that magnetic material constitutes, be suspended in the magnetic fluid in the non-magnetic housing by the action of a magnetic field;
Magnetic part: constitute by magnetic material, be positioned at the outer end of magnetic float two magnetic poles, be located at the non-magnetic housing outside;
Pick-up unit: be located at the outside of non-magnetic housing, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal;
The outside, described non-magnetic housing two ends is provided with groove, is used for the installation and measuring device, and described non-magnetic housing is a rectangular parallelepiped, and two opposite groups outer wall wherein one group of two sides axially is provided with circumferential boss in the middle part; The a pair of relative lateral surface of non-magnetic housing is separated into four zones is used for the installation and measuring device;
Described non-magnetic housing is provided with the magnetic field control device outward, be used to change the viscosity of magnetic fluid, the displacement of control magnetic float, described magnetic field control device comprises control coil, described control coil is wound in the described non-magnetic housing outside, produce magnetic field by impressed current, change the viscosity of magnetic fluid, the displacement of control magnetic float.
3, acceleration transducer according to claim 1 and 2 is characterized in that, described magnetic field control device also comprises the coil stationary cover, and described coil stationary cover is placed in the described non-magnetic housing outside, and described control coil is wound in the described coil stationary cover outside.
4, acceleration transducer according to claim 1 and 2 is characterized in that, described pick-up unit comprises:
Axle head pick-up unit: be located at the outside of the two ends non-magnetic housing of magnetic float magnetic pole, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal;
Described axle head pick-up unit comprises the magnetic displacement detecting element: adopt Hall element, be positioned at the outer end of magnetic float two magnetic poles, be located at the non-magnetic housing outside, detect the displacement of magnetic float, output acceleration detection consequential signal; And be provided with isolated component between described magnetic displacement detecting element and described magnetic part;
Circumferential pick-up unit: the outside of being located at the circumferential non-magnetic housing of the non-pole orientation of magnetic float, be used to detect the change in displacement of magnetic float, output acceleration detection consequential signal, described circumferential pick-up unit comprises circumferential displacement detecting element, described circumferential displacement detecting element comprises that two groups are detected electric capacity, and axially left-right symmetric is installed on the lateral surface of non-magnetic housing;
Described two groups of detection electric capacity comprise two semicircles or flat pole plate respectively, and two axial symmetries of pole plate are installed on the lateral surface of non-magnetic housing.
5, acceleration transducer according to claim 4, it is characterized in that, described pick-up unit also comprises signal processing module, and described signal processing module is used for the differential connection of magnetic displacement detecting element, and the acceleration detection consequential signal that detects is optimized processing.
6, acceleration transducer according to claim 4, it is characterized in that, described pick-up unit also comprises signal processing module, and described signal processing module is used for detecting capacitance difference with two groups and is dynamically connected, and the acceleration detection consequential signal that detects is optimized processing.
7, acceleration transducer according to claim 1 and 2 is characterized in that, described non-magnetic housing comprises non magnetic urceolus and non magnetic end cap, wherein:
Described non magnetic urceolus one or both ends opening, when an end opening, openend is installed a non magnetic end cap and is formed non-magnetic housing; When both ends open, two openends are installed a non magnetic end cap respectively and are formed non-magnetic housing.
8, acceleration transducer according to claim 7 is characterized in that, is provided with sealing ring between described non magnetic urceolus and the non magnetic end cap.
9, acceleration transducer according to claim 1 and 2 is characterized in that, described magnetic fluid is one or both the combination in magnetic compound fluid or the magnetic rheological body; Described magnetic float is sphere, elliposoidal or rectangle.
10, acceleration transducer according to claim 1 and 2 is characterized in that, described acceleration transducer also comprises interior chuck, and described non-magnetic housing, magnetic fluid, magnetic float and pick-up unit all are located in the interior chuck;
Chuck sleeve and gland in chuck specifically comprises in described, gland and interior chuck sleeve are fixedly installed in described pick-up unit in the interior chuck by bolt.
11, acceleration transducer according to claim 1 and 2, it is characterized in that, described acceleration transducer also comprises shell body, described non-magnetic housing, magnetic fluid, magnetic float and pick-up unit all are located in the inner chamber of shell body, described shell body specifically comprises outer sleeve and outer end cap, outer sleeve and outer end cap are by bolt, and described outer end cap is provided with installs leg or mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100040748A CN100432677C (en) | 2006-01-28 | 2006-01-28 | Acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100040748A CN100432677C (en) | 2006-01-28 | 2006-01-28 | Acceleration sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1924590A CN1924590A (en) | 2007-03-07 |
| CN100432677C true CN100432677C (en) | 2008-11-12 |
Family
ID=37817314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100040748A Expired - Fee Related CN100432677C (en) | 2006-01-28 | 2006-01-28 | Acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100432677C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650649B (en) * | 2011-02-28 | 2014-08-20 | 北京中联博韬科技咨询有限公司 | Accelerometer |
| CN104049108B (en) * | 2014-07-01 | 2017-01-11 | 重庆材料研究院有限公司 | Acceleration sensor based on magneto-rheological elastic body |
| CN105841718B (en) * | 2015-01-29 | 2020-08-04 | 万渡江 | Fall sensor |
| CN104765007A (en) * | 2015-04-22 | 2015-07-08 | 北京交通大学 | Magnetic liquid magnetic induction intensity sensor |
| US10180445B2 (en) * | 2016-06-08 | 2019-01-15 | Honeywell International Inc. | Reducing bias in an accelerometer via current adjustment |
| CN108508230B (en) * | 2017-02-27 | 2021-07-23 | 川崎重工业株式会社 | Acceleration sensor assembly |
| CN107957506B (en) * | 2017-10-11 | 2019-11-19 | 杭州电子科技大学 | A kind of three-dimensional acceleration detection method |
| CN108548940A (en) * | 2018-06-22 | 2018-09-18 | 西安交通大学 | A kind of acceleration transducer |
| CN114526730B (en) * | 2022-01-21 | 2023-06-30 | 华南理工大学 | Motion speed estimation method and device based on magnetic gradient |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043204A (en) * | 1976-08-16 | 1977-08-23 | The United States Of America As Represented By The Secretary Of The Army | Magnetic fluid bearing accelerometer |
| US4905517A (en) * | 1988-08-31 | 1990-03-06 | Amoco Corporation | Multicomponent transducer |
| US4922753A (en) * | 1987-05-30 | 1990-05-08 | Nippon Soken, Inc. | Acceleration sensor |
| US4984463A (en) * | 1988-09-28 | 1991-01-15 | Nippon Soken, Inc. | Two-dimensional acceleration sensor |
| US5024087A (en) * | 1988-07-28 | 1991-06-18 | Diesel Kiki Co., Ltd. | Acceleration sensor |
| JPH04344467A (en) * | 1991-05-22 | 1992-12-01 | Toyota Motor Corp | Acceleration sensor |
| US5756896A (en) * | 1995-09-05 | 1998-05-26 | Texas Components Corporation | Extended range accelerometer |
-
2006
- 2006-01-28 CN CNB2006100040748A patent/CN100432677C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043204A (en) * | 1976-08-16 | 1977-08-23 | The United States Of America As Represented By The Secretary Of The Army | Magnetic fluid bearing accelerometer |
| US4922753A (en) * | 1987-05-30 | 1990-05-08 | Nippon Soken, Inc. | Acceleration sensor |
| US5024087A (en) * | 1988-07-28 | 1991-06-18 | Diesel Kiki Co., Ltd. | Acceleration sensor |
| US4905517A (en) * | 1988-08-31 | 1990-03-06 | Amoco Corporation | Multicomponent transducer |
| US4984463A (en) * | 1988-09-28 | 1991-01-15 | Nippon Soken, Inc. | Two-dimensional acceleration sensor |
| JPH04344467A (en) * | 1991-05-22 | 1992-12-01 | Toyota Motor Corp | Acceleration sensor |
| US5756896A (en) * | 1995-09-05 | 1998-05-26 | Texas Components Corporation | Extended range accelerometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1924590A (en) | 2007-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100432677C (en) | Acceleration sensor | |
| CN100410165C (en) | Miniature relay and corresponding uses thereof | |
| CN103765178B (en) | magnetic load sensor | |
| FI112400B (en) | Method for indicating information and pointing device | |
| JP6301970B2 (en) | Magnetic linear or rotary encoder | |
| US20130228401A1 (en) | Vibration damper having a sensor device | |
| JP5425583B2 (en) | MEMS accelerometer | |
| JP2016509232A5 (en) | ||
| JP2009535594A (en) | Controllable vehicle suspension system with controllable ferrofluid struts | |
| CN103675351A (en) | Novel inductive magnetic liquid acceleration sensor | |
| JP5634697B2 (en) | Micro Electro Mechanical System (MEMS) Force Parallel Accelerometer | |
| CN103675342A (en) | Novel range-adjustable magnetic liquid acceleration sensor | |
| CN109373886B (en) | Detection device based on dimensional morphology changes | |
| RU2594628C1 (en) | Two degrees of freedom float gyroscope | |
| US20090206846A1 (en) | Capacitor-based position sensor for vehicle | |
| CN100595591C (en) | Two-dimension magnetic fluid acceleration transducer | |
| CN100573154C (en) | Magnetic fluid acceleration transducer | |
| CN102163514A (en) | Permanent magnet type universal collision sensor | |
| CN101246184B (en) | Quasi-two-dimension magnetic fluid acceleration transducer | |
| CN208902031U (en) | Detection device based on scale topography variation | |
| CN101650219B (en) | Inside sphere type vector vibration transducer | |
| CN202058638U (en) | Permanent-magnet universal collision sensor adopting four elastic rods | |
| JPH0632626Y2 (en) | Sensor | |
| CN114839396B (en) | Magnetic liquid acceleration sensor | |
| JP2510275B2 (en) | Acceleration sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |