CN106524895A - Capacitance sensor-based strain test device of magnetic shape memory alloy - Google Patents
Capacitance sensor-based strain test device of magnetic shape memory alloy Download PDFInfo
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- CN106524895A CN106524895A CN201610957553.5A CN201610957553A CN106524895A CN 106524895 A CN106524895 A CN 106524895A CN 201610957553 A CN201610957553 A CN 201610957553A CN 106524895 A CN106524895 A CN 106524895A
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- memory alloy
- shape memory
- movable plate
- capacitance sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/22—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in capacitance
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention discloses a capacitance sensor-based strain test device of magnetic shape memory alloy. According to the device, micro-deformation such as magnetic-field-induced strain of the magnetic shape memory alloy is converted into the change of the area of the parallel polar plate of a parallel plate capacitor probe, and displacement amount is converted to change amount. With the device adopted, the technical problem that a strain existing test device is affected by the surrounding strong magnetic field of the magnetic shape memory alloy can be solved, and therefore, the detection accuracy of the strain test device of the invention can be improved. The capacitance sensor-based strain test device of the magnetic shape memory alloy of the invention includes a capacitance probe, a gear amplifying mechanism (10), an input mechanism (11) an output mechanism (9) and the like.
Description
Technical field
The present invention relates to technical field of electromechanical control, more particularly to a kind of magnetic control shape memory conjunction based on capacitance sensor
The strain detection testing device of gold.
Background technology
In the research process of magnetic shape memory alloy, need to measure magneto-strain, but do not have special magnetic at present
Property strain testing instrument.When test using existing strain testing instrument, its accuracy is inevitably subject to magnetic
The impact of high-intensity magnetic field around memorial alloy, this brings very big inconvenience to the research of magnetic memorial alloy material.
The content of the invention
The invention provides a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor, by handle
The miniature deformation amount such as magneto-strain of magnetic control memory alloy is converted into the change of the parallel plate electrode area of plane-parallel capacitor probe,
Displacement is converted to into the variable quantity of capacitance.The technical problem affected by surrounding high-intensity magnetic field by effectively solving magnetic memorial alloy,
So as to improve its detection accuracy.
A kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor in the present invention, including：Electric capacity
Probe, gear enlarger mechanism 10, input mechanism 11 and output mechanism 9；
The gear enlarger mechanism 10 includes N number of gear train, and each gear train is different by two installed on the same axis
The gear composition of reference diameter, for by N number of gear train, realizing that the transmission step by step of micro-displacement is amplified；
The input unit 11 and the output mechanism 9 are respectively positioned at the upper and lower part of the gear enlarger mechanism 10, and lead to
Cross tooth bar to be connected with the gear engagement inside the gear enlarger；
The capacitance probe includes：Fixed plate group, movable plate electrode group and guide rail mechanism 17；
The movable plate electrode group is slidably connected by guide rail mechanism 17 with the fixed plate group；
The tooth bar is used to promote movable plate electrode, and displacive transformation is determined pole with described into the movable plate electrode group that capacitor is popped one's head in
There is relative movement, the change of the area and capacitance of capacitor probe in plate.
Optionally,
The fixed plate group includes fixed plate fixed mount 1 and the N number of fixed plate 4 being fixed on the fixed plate fixed mount 1.
Optionally,
The fixed plate 4 includes the non-conductor of metal or Jing surface metalations.
Optionally,
The fixed plate 4 passes through fixed plate fixed mount 1 prominent its surface.
Optionally,
The fixed plate 4 passes through fixed plate fixed mount 1 prominent 3 7mm of its surface.
Optionally,
The movable plate electrode group includes movable plate electrode fixed mount 5 and the N number of movable plate electrode 8 being fixed on the movable plate electrode fixed mount 5.
Optionally,
The movable plate electrode 8 includes the non-conductor of metal or Jing surface metalations.
Optionally,
The movable plate electrode 8 passes through movable plate electrode fixed mount 5 prominent its surface.
Optionally,
The movable plate electrode 8 passes through movable plate electrode fixed mount 5 prominent 3 7mm of its surface.
Optionally,
The capacitance probe also includes：Termination electrode terminal plate 2-3 and 6-7；The electrode connection plate is by substrate 3 and thereon
Some thin copper film 12-15 compositions；
For by changing termination electrode terminal plate and fixed plate 4 and the relative position of movable plate electrode 8, so as to change capacitance probe
Internal multilayer connected mode；
When outside thin copper film 12 or 15 is connected with pole plate, formed respectively connected in series or in parallel；
When inner side thin copper film 12 or 14 is connected with pole plate, formed respectively connected in series or in parallel.
As can be seen from the above technical solutions, the embodiment of the present invention specifically has the advantage that：
The characteristics of little is affected on condenser capacitance value according to magnetic field, there is provided it is a kind of based on capacitor probe, and carry gear
Enlarger, be particularly well-suited to the test device of magnetic control shape memory alloy magneto-strain.By being made up of multi-stage gear group
Enlarger, multistage transmission is carried out to the small magneto-strain that magnetic control memory alloy is produced and is amplified, then by rack gear arrangement,
The movable plate electrode movement of capacitor probe is promoted, is changed the area between pole plate, displacive transformation is become into the change of capacitance.
Description of the drawings
Fig. 1 is a kind of strain detection testing device embodiment knot of magnetic control shape memory alloy based on capacitance sensor of the present invention
Composition；
Fig. 2 is a kind of strain detection testing device embodiment end of the magnetic control shape memory alloy based on capacitance sensor of the present invention
Electrode connection plate schematic diagram；
Fig. 3 is that a kind of strain detection testing device embodiment of the magnetic control shape memory alloy based on capacitance sensor of the present invention is led
Rail mechanism schematic diagram.
Specific embodiment
The invention provides a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor, by handle
The miniature deformation amount such as magneto-strain of magnetic control memory alloy is converted into the change of the parallel plate electrode area of plane-parallel capacitor probe,
Displacement is converted to into the variable quantity of capacitance.The technical problem affected by surrounding high-intensity magnetic field by effectively solving magnetic memorial alloy,
So as to improve its detection accuracy.
Refer to Fig. 1 to Fig. 3, a kind of strain testing of the magnetic control shape memory alloy based on capacitance sensor in the present invention
Device, including：Capacitance probe, gear enlarger mechanism 10, input mechanism 11 and output mechanism 9；
The gear enlarger mechanism 10 includes N number of gear train, and each gear train is different by two installed on the same axis
The gear composition of reference diameter, for by N number of gear train, realizing that the transmission step by step of micro-displacement is amplified；
The input unit 11 and the output mechanism 9 are respectively positioned at the upper and lower part of the gear enlarger mechanism 10, and lead to
Cross tooth bar to be connected with the gear engagement inside the gear enlarger；
The capacitance probe includes：Fixed plate group, movable plate electrode group and guide rail mechanism 17；
The movable plate electrode group is slidably connected by guide rail mechanism 17 with the fixed plate group, and movable plate electrode group can be along guide rail mechanism
Move on 17, so as to change the area of electrode for capacitors.
The tooth bar is used to promote movable plate electrode, and displacive transformation is determined pole with described into the movable plate electrode group that capacitor is popped one's head in
There is relative movement, the change of the area and capacitance of capacitor probe in plate.
It should be noted that the device is popped one's head in by capacitor, gear enlarger mechanism 10 and appendage are constituted.Capacitor is visited
Head is multilayer parallel plate variable condenser structure, it is adaptable to which the miniature deformation amounts such as the magneto-strain of magnetic control memory alloy are converted into
Displacement is converted to the variable quantity of capacitance by the change of the parallel plate electrode area of plane-parallel capacitor probe.According to magnetic field pair
The characteristics of condenser capacitance value affects little, by the enlarger being made up of multi-stage gear group, produces to magnetic control memory alloy
Small magneto-strain carries out multistage transmission and amplifies, then by rack gear arrangement, promotes the movable plate electrode movement of capacitor probe, change
Displacive transformation is become the change of capacitance by the area between pole plate.
In the present invention, a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor is further included：
The fixed plate group includes fixed plate fixed mount 1 and the N number of fixed plate 4 being fixed on the fixed plate fixed mount 1.
The fixed plate 4 includes the non-conductor of metal or Jing surface metalations.
The fixed plate 4 passes through fixed plate fixed mount 1 prominent 3 7mm of its surface.
It should be noted that fixed plate group is made up of fixed plate fixed mount 1 and some fixed plates 4 being fixed on this,
Fixed plate is made up of the non-conductor of the metal with some strength or Jing surface metalations, and pole plate passes through fixed mount prominent its table
Face about 2-7mm, to guarantee and terminal plate good contact.
In the present invention, a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor is further included：
The movable plate electrode group includes movable plate electrode fixed mount 5 and the N number of movable plate electrode 8 being fixed on the movable plate electrode fixed mount 5.
The movable plate electrode 8 includes the non-conductor of metal or Jing surface metalations.
The movable plate electrode 8 passes through movable plate electrode fixed mount 5 prominent its surface.
The movable plate electrode 8 passes through movable plate electrode fixed mount 5 prominent 3 7mm of its surface.
It should be noted that movable plate electrode group by movable plate electrode fixed mount 5 and some movable plate electrodes being fixed on this (8 constitute,
Movable plate electrode 8 is made up of the non-conductor of the metal with some strength or Jing surface metalations, and pole plate passes through fixed mount and projects which
Surface about 2-7mm, to guarantee and terminal plate good contact.
In the present invention, a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor is further included：
The capacitance probe also includes：Termination electrode terminal plate 2-3 and 6-7；The electrode connection plate is by substrate 3 and thereon
Some thin copper film 12-15 compositions；
For by changing termination electrode terminal plate and fixed plate 4 and the relative position of movable plate electrode 8, so as to change capacitance probe
Internal multilayer connected mode；
When outside thin copper film 12 or 15 is connected with pole plate, formed respectively connected in series or in parallel；
When inner side thin copper film 12 or 14 is connected with pole plate, formed respectively connected in series or in parallel.
It should be noted that the termination electrode terminal plate of capacitor probe some thin copper film 12-15 groups by substrate 3 and thereon
Into.By changing termination electrode terminal plate with fixed plate and the relative position of movable plate electrode, thus it is possible to vary each layer in multi-layer capacitor
Connected mode.When outside thin copper film 12 or 15 is connected with pole plate, can form connected in series or in parallel respectively, inner side thin copper film
13 or 14 when being connected with pole plate, can form the connected mode of several series and parallel mixing.
In the strain detection testing device of above-mentioned magnetic control shape memory alloy, the guide rail mechanism of capacitor probe can be one side
Insulating materials 17 with rectangular channel, also can be carried in larger rectangular channel, rectangular channel by one side and fixedly mount rectangular metal type
The insulating materials composition of material 16.Rectangular channel inner surface Jing is polished or polishing, is conducive to movable plate electrode movement thereon.
The above, above example only to illustrate technical scheme, rather than a limitation；Although with reference to front
State embodiment to be described in detail the present invention, it will be understood by those within the art that：Which still can be to front
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor, it is characterised in that include：Electric capacity
Probe, gear enlarger mechanism (10), input mechanism (11) and output mechanism (9)；
The gear enlarger mechanism (10) includes N number of gear train, and each gear train is by two differences installed on the same axis point
The gear composition of degree circular diameter, for by N number of gear train, realizing that the transmission step by step of micro-displacement is amplified；
The input unit (11) and the output mechanism (9) are located at the upper and lower part of the gear enlarger mechanism (10) respectively, and
It is connected with the gear engagement inside the gear enlarger by tooth bar；
The capacitance probe includes：Fixed plate group, movable plate electrode group and guide rail mechanism (17)；
The movable plate electrode group is slidably connected by guide rail mechanism (17) with the fixed plate group；
The tooth bar is used to promote movable plate electrode, and displacive transformation is sent out into the movable plate electrode group that capacitor is popped one's head in the fixed plate
Raw relative movement, the change of the area and capacitance of capacitor probe.
2. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 1,
Characterized in that,
The fixed plate group includes fixed plate fixed mount (1) and the N number of fixed plate being fixed on the fixed plate fixed mount (1)
(4)。
3. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 2,
Characterized in that,
The fixed plate (4) is including metal or the non-conductor of Jing surface metalations.
4. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 2,
Characterized in that,
The fixed plate (4) is through fixed plate fixed mount (1) and projects its surface.
5. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 4,
Characterized in that,
The fixed plate (4) is through fixed plate fixed mount (1) and projects 3 7mm of its surface.
6. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 1,
Characterized in that,
The movable plate electrode group includes movable plate electrode fixed mount (5) and the N number of movable plate electrode being fixed on the movable plate electrode fixed mount (5)
(8)。
7. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 6,
Characterized in that,
The movable plate electrode (8) is including metal or the non-conductor of Jing surface metalations.
8. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 6,
Characterized in that,
The movable plate electrode (8) is through movable plate electrode fixed mount (5) and projects its surface.
9. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 8,
Characterized in that,
The movable plate electrode (8) is through movable plate electrode fixed mount (5) and projects 3 7mm of its surface.
10. the strain detection testing device of a kind of magnetic control shape memory alloy based on capacitance sensor according to claim 1,
Characterized in that,
The capacitance probe also includes：Termination electrode terminal plate (2-3) and (6-7)；The electrode connection plate is by substrate (3) and thereon
Some thin copper films (12-15) composition；
For by changing termination electrode terminal plate and fixed plate (4) and the relative position of movable plate electrode (8), so as to change capacitance probe
Internal multilayer connected mode；
When outside thin copper film (12) or (15) are connected with pole plate, formed respectively connected in series or in parallel；
When inner side thin copper film (12) or (14) are connected with pole plate, formed respectively connected in series or in parallel.
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| CN201610957553.5A CN106524895B (en) | 2016-10-27 | 2016-10-27 | A kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor |
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| CN201610957553.5A CN106524895B (en) | 2016-10-27 | 2016-10-27 | A kind of strain detection testing device of the magnetic control shape memory alloy based on capacitance sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102279A (en) * | 2017-05-26 | 2017-08-29 | 东北石油大学 | A kind of magnetic strain measuring method |
| CN108469221A (en) * | 2018-05-29 | 2018-08-31 | 南京铁道职业技术学院 | High-speed railway pantograph carbon slide surface damage displacement-charge converter |
| CN108759654A (en) * | 2018-06-27 | 2018-11-06 | 南京铁道职业技术学院 | A kind of single probe pantograph carbon slide surface indentation slot measurement converter |
| CN112857557A (en) * | 2021-01-14 | 2021-05-28 | 中国地质大学（武汉） | Auditory sensor based on 4D printing technology shaping |
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| DE3921237A1 (en) * | 1989-06-26 | 1991-01-10 | Bam Bundesanstalt Matforschung | Capacitive deformation sensor for high temp. operation - has two stages of flat, parallel and rectangular, parallel plates forming differential capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107102279A (en) * | 2017-05-26 | 2017-08-29 | 东北石油大学 | A kind of magnetic strain measuring method |
| CN108469221A (en) * | 2018-05-29 | 2018-08-31 | 南京铁道职业技术学院 | High-speed railway pantograph carbon slide surface damage displacement-charge converter |
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| CN112857557A (en) * | 2021-01-14 | 2021-05-28 | 中国地质大学（武汉） | Auditory sensor based on 4D printing technology shaping |
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