CN107247125A - Metal enclosed internal test instrument triggering method based on giant magnetoresistance effect - Google Patents
Metal enclosed internal test instrument triggering method based on giant magnetoresistance effect Download PDFInfo
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- CN107247125A CN107247125A CN201710446885.1A CN201710446885A CN107247125A CN 107247125 A CN107247125 A CN 107247125A CN 201710446885 A CN201710446885 A CN 201710446885A CN 107247125 A CN107247125 A CN 107247125A
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- giant magnetoresistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/95—Proximity switches using a magnetic detector
Abstract
The present invention is a kind of metal enclosed internal test instrument triggering method based on giant magnetoresistance effect.The triggering method is that two external walls of the magnetic pole metal enclosed relative with the second magnetic conductor with the first magnetic conductor of U-shaped magnet are close, to being applied with a magnetic signal inside metal enclosed body, so that the resistance positioned at the 3rd magnetic conductor bottom and the one of which giant magnetoresistance on top increases, the resistance of another set giant magnetoresistance reduces, the resistance signal of giant magnetoresistance change in resistance formation is converted into voltage output signal, voltage output signal is by amplification, blocking, filtering, compare the voltage signal for obtaining low transition to high level, storage tester can be caused to start the voltage signal of triggering, realize the triggering to storing tester.The present invention is attracted each other and repulsive interaction using it by the way that magnet is intermediate polarity, is adjusted the density of magnetic induction line and then is adjusted magnetic field intensity, the sensitive change for alloing it reliably to adjust giant magnetoresistance.
Description
Technical field
Using giant magnetoresistance effect the tester of resting state in metal enclosed body is triggered the present invention relates to a kind of
Method, specifically a kind of metal enclosed internal test instrument triggering method based on giant magnetoresistance effect.
Background technology
At present, storage tester application field is quite varied, and difficult movement parts dynamic parametric test neck is transmitted in signal
Domain plays vital effect.Tester live completion dynamic parametric test in real time is stored, is completed, takes out metal enclosed
Internal storage tester, the data to acquisition are analyzed and processed.
Store tester（For example：Patent of invention-micro intelligent electronic tester-CN200910074322.X）Typically adopt
With lithium battery power supply and nonvolatile storage for data, the working environment of small space and motion is proposed to storage tester
Very high micro-volume and low-power consumption requirement, are in particular in：The power consumption of storage tester is as low as possible and stores tester
Adoption status is designed, that is, is stored tester and be in Low-power-consumptiodormancy dormancy state before testing, when waiting to need test, is surveyed to storage
Try one trigger signal of instrument（Ordered equivalent to starting）, store tester and start working, realize that the dynamic parameter of measurand is surveyed
Examination, task to be tested is finished（Meet the condition of setting data capacity or setting time）, storage tester is automatically into dormancy
State；If repeatedly interval test is, it is necessary to repeatedly give storage one trigger signal of tester（Ordered equivalent to starting）, realize many
It is secondary to wake up.Therefore, when storage tester starts working depending on trigger signal（Start order）, namely trigger signal is storage
Unique startup order that tester is started working, it is impossible to occur needing not trigger when starting storage tester（Also referred to as
Not triggering when should trigger）, storage tester is triggered when can not occur triggering（Also referred to as should not
False triggering when triggering）, then, it is impossible to do not trigger, can not false triggering, correctly reliably triggering be storage tester it is normal
One key technology of work.
The triggering method of storage tester typically has：Clocked flip（It is to think event more than setting time, that is, obtains
It is unique to start order）, internal trigger（Judge whether comparison signal is more than predetermined threshold, if signal is to think more than predetermined threshold
Event occurs, that is, obtains unique start and order）, external trigger（Receive extraneous trigger signal and think event, that is, obtain only
One startup order）.For typically conventional external trigger method, the key correctly triggered is to transmit reliable and effective triggering letter
Number, but, metal enclosed body has certain inhibition for the transmission of the signal such as electricity, heat, light, sound, using limited；Although metal
Obturator has certain shielding action to magnetic field, but simply to magnetic signal amplitude fading, can be by outside metal enclosed body
Magnetic signal is delivered to inside metal enclosed body（Open source information and practical experience show that the shield effectiveness of metal shield can not reach
Magnetic field intensity decays to zero stage）.Then the present invention realizes metal using giant magnetoresistance to the sensitivity response of faint magnetic signal
The triggering of obturator memory storage tester.
The content of the invention
The present invention is difficult to effective Trigger Problems there is provided one kind based on huge to solve to store tester in metal enclosed body
The triggering method of the metal enclosed internal test instrument of magnetoresistance.
The present invention is achieved through the following technical solutions：Metal enclosed internal test instrument triggering based on giant magnetoresistance effect
Method, the triggering method realized by triggering device,
The triggering device includes being arranged at the U-shaped magnet on the left of the external wall of metal enclosed, two magnetic poles direction gold of U-shaped magnet
Belong to obturator, the first magnetic conductor and the are installed on wall left surface in the metal enclosed body relative with two magnetic poles of U-shaped magnet
Two magnetic conductors；
It is relative with the second magnetic conductor middle part level inside metal enclosed body to be provided with the second giant magnetoresistance and the 4th giant magnetoresistance,
Second giant magnetoresistance and the 4th giant magnetoresistance respectively it is front and rear it is parallel be arranged side by side and there is spacing between the two, the second giant magnetoresistance
It is located at the horizontal center line of the 4th giant magnetoresistance in same level, the bottom surface of the second magnetic conductor and the second giant magnetoresistance and the
The bottom surface of four giant magnetoresistances is in same level or less than both floor heights, the front and rear width of the second magnetic conductor and second
The distance between giant magnetoresistance lateral surface and the 4th giant magnetoresistance lateral surface are equal or are wider than the distance between both lateral surfaces, the
Center line between the horizontal center line of two magnetic conductors and the second giant magnetoresistance and the 4th giant magnetoresistance is in same level；
Metal enclosed body on the right side of second giant magnetoresistance and the 4th giant magnetoresistance is internally provided with the second bar magnet, the second bar shaped
Magnet is located on the center line between the second giant magnetoresistance and the 4th giant magnetoresistance；
It is relative with the first magnetic conductor middle part level inside metal enclosed body to be provided with the first giant magnetoresistance and the 3rd giant magnetoresistance,
First giant magnetoresistance and the 3rd giant magnetoresistance respectively it is front and rear it is parallel be arranged side by side and there is spacing between the two, the first giant magnetoresistance
It is located at the horizontal center line of the 3rd giant magnetoresistance in same level, the first giant magnetoresistance is where inside the metal enclosed body
All around position is identical with the second giant magnetoresistance, all around position of the 3rd giant magnetoresistance where inside the metal enclosed body
Identical with the 4th giant magnetoresistance, the top surface of the top surface of the first magnetic conductor and the first giant magnetoresistance and the 3rd giant magnetoresistance is in same water
In plane or higher than both floor heights, the front and rear width of the first magnetic conductor and the first giant magnetoresistance lateral surface and the 3rd huge magnetic
The distance between resistance lateral surface is equal or is wider than the distance between both lateral surfaces；
Metal enclosed body on the right side of first giant magnetoresistance and the 3rd giant magnetoresistance is internally provided with the first bar magnet, the first bar shaped
Magnet is located on the center line between the first giant magnetoresistance and the 3rd giant magnetoresistance；
Second bar magnet is identical with the direction where the magnetic pole of the first bar magnet, the second giant magnetoresistance positioned at bottom,
Four giant magnetoresistances and the second bar magnet pass through flat 3rd magnetic conductor positioned at middle part and the superposed first huge magnetic
Resistance, the 3rd giant magnetoresistance and the first bar magnet are spaced apart, and flat 3rd magnetic conductor and metal enclosed body are all around
Four walls be connected, by whole metal enclosed body be divided into above and below two independent spaces；
First giant magnetoresistance, the second giant magnetoresistance, the 3rd giant magnetoresistance and the 4th giant magnetoresistance constitute differential full-bridge；
One end of first giant magnetoresistance is connected to form A tie points with one end of the 4th giant magnetoresistance by lead, the second huge magnetic
One end of resistance is connected to form C tie points with one end of the 3rd giant magnetoresistance by lead, the other end of the first giant magnetoresistance
It is connected to form B tie points by lead with the other end of the second giant magnetoresistance, the other end of the 3rd giant magnetoresistance and the 4th huge
The other end of magneto-resistor is respectively connecting to inside metal enclosed body directly by lead formation D tie points, A tie points and C tie points
Power supply U both positive and negative polarity is flowed, B tie points and D tie points pass through lead formation output end Uo, output end Uo access differential amplifying circuits
Module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit module, comparison circuit module output end is surveyed with storage
Examination instrument is connected；
The triggering method is by two magnetic poles of U-shaped magnet metal enclosed relative with the second magnetic conductor with the first magnetic conductor respectively
External wall is close, to being applied with a magnetic signal inside metal enclosed body so that positioned at its of the 3rd magnetic conductor bottom and top
In one group of giant magnetoresistance resistance increase, the resistance of another set giant magnetoresistance reduces, the electricity of giant magnetoresistance change in resistance formation
Resistance signal is converted into voltage output signal by differential bridge, voltage output signal by differential amplification, blocking, amplification filtering,
Compare and obtain by the voltage signal of low transition to high level, i.e., storage tester can be caused to start the voltage letter of triggering
Number, realize the triggering to storing tester.
The beneficial effect of the triggering method of metal enclosed internal test instrument of the present invention based on giant magnetoresistance effect is：
1. currently used storage tester is arranged in metal enclosed body, such storage tester adapts to complicated adverse circumstances,
But metal enclosed body hinders the transmission of the signals such as light, electricity, it is considered to the storage in metal enclosed body is tested using magnetic signal
Instrument is triggered.Although metal enclosed body has decay shielding action to magnetic signal, simply to the amplitude fading of magnetic signal, make
It is changed into faint magnetic signal, be not to mask magnetic signal completely, i.e. the decay to the magnetic signal amount of being rather than matter is not deposited
Therefore, the present invention solves the signal problem of transmission of metal enclosed inside and outside, realizes and metal enclosed body storage inside is surveyed
Try the reliable triggering of instrument；
2. use three magnet（One U-shaped magnet and two bar magnets）, attracted each other using it by the way that magnet is intermediate polarity
With repulsive interaction, adjust the density of magnetic induction line and then adjust magnetic field intensity, it is reliably adjusted giant magnetoresistance increasing
Sensitive change that is big or reducing；
3. using the magnetic conductor in low-intensity magnetic field with high permeability, strengthen magnetic property, it is ensured that magnetic signal reliable delivery.Example
Such as, the permalloy of soft magnetic materials, it has high magnetic conductivity, low-loss and low coercivity in low-intensity magnetic field；
4. the differential full bridge structure constituted using giant magnetoresistance, by faint resistance variations（Signal）Be converted to voltage signal.Difference
The sensitivity of dynamic full bridge structure compared to its change of wheatstone bridge improves 4 times, is a kind of precision very high metering system；
5. the storage tester in obturator is triggered using giant magnetoresistance effect.Giant magnetoresistance can be by very small and weak magnetic field
Change causes the resistance variations of highly significant, and its Amplitude Ratio changed is generally high more than ten times, and with small volume, sensitivity it is high,
The linearity is good, the range of linearity is wide, response frequency is high, phase accuracy and repeatable accuracy are good, noise resisting ability is strong, operating temperature range
Extensively, reliability height, low cost and other advantages.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the overall structure diagram of storage tester triggering device in metal enclosed body.
Fig. 2 is sectional views of the Fig. 1 in A-A directions.
Fig. 3 is sectional views of the Fig. 1 in B-B directions.
Fig. 4 is differential full-bridge circuit figure when U-shaped magnet above S extremely descends the placement of N poles.
Fig. 5 is differential full-bridge circuit figure when U-shaped magnet above N extremely descends the placement of S poles.
Fig. 6 is the circuit diagram that the Uo signals that differential bridge is exported pass through amplification, blocking, filter, compare processing（Known skill
Art）.
In figure：1- metal enclosed bodies, 2- magnet, 2a-U type magnet, the bar magnets of 2b- first, the bar magnets of 2c- second,
3- magnetic conductors, the magnetic conductors of 3a- first, the magnetic conductors of 3b- second, the magnetic conductors of 3c- the 3rd, 4- giant magnetoresistances, the huge magnetoelectricities of 4a- first
Resistance, the giant magnetoresistances of 4b- second, the giant magnetoresistances of 4c- the 3rd, the giant magnetoresistances of 4d- the 4th, 5,5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h,
5i, 5j, 5k, 5l- supporter, 6- storage testers, y1, y2, y3, y4, y5, y6, y7, y8, y9, y10, y11, y12- lead.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are resulting on the premise of creative work is not made to be owned
Other embodiment, belongs to the scope that the present invention is protected.
The metal enclosed internal test instrument triggering method of the present invention based on giant magnetoresistance effect is entered below in conjunction with the accompanying drawings
Row detailed description.
Metal enclosed internal test instrument triggering method based on giant magnetoresistance effect, the triggering method is real by triggering device
Existing,
The triggering device includes being arranged at the U-shaped magnet 2a on the left of the outer wall of metal enclosed body 1, U-shaped magnet 2a two magnetic poles
Towards metal enclosed body 1, first is provided with the inwall left surface of metal enclosed body 1 relative with U-shaped magnet 2a two magnetic poles
Magnetic conductor 3a and the second magnetic conductor 3b；
The inside of metal enclosed body 1 it is relative with the second magnetic conductor 3b middle parts level be provided with the second giant magnetoresistance 4b and the 4th huge magnetic
Resistance 4d, the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d respectively it is front and rear it is parallel be arranged side by side and there is spacing between the two,
Second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d horizontal center line is located in same level, the second magnetic conductor 3b bottom surface
Bottom surface with the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d is in same level or less than both floor heights, second
Magnetic conductor 3b front and rear width is equal with the distance between the second giant magnetoresistance 4b lateral surfaces and the 4th giant magnetoresistance 4d lateral surfaces
Or it is wider than the distance between both lateral surfaces, the second magnetic conductor 3b horizontal center line and the second giant magnetoresistance 4b and the 4th huge magnetic
Center line between resistance 4d is in same level；
Metal enclosed body 1 on the right side of second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d is internally provided with the second bar magnet 2c,
Second bar magnet 2c is located on the center line between the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d；
The inside of metal enclosed body 1 it is relative with the first magnetic conductor 3a middle parts level be provided with the first giant magnetoresistance 4a and the 3rd huge magnetic
Resistance 4c, the first giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c respectively it is front and rear it is parallel be arranged side by side and there is spacing between the two,
First giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c horizontal center line is located in same level, and the first giant magnetoresistance 4a is in gold
Position all around where belonging to the inside of obturator 1 is identical with the second giant magnetoresistance 4b, and the 3rd giant magnetoresistance 4c is in metal enclosed
Position all around where the inside of body 1 is identical with the 4th giant magnetoresistance 4d, the first magnetic conductor 3a top surface and the first huge magnetoelectricity
4a and the 3rd giant magnetoresistance 4c top surface is hindered in same level or higher than both floor heights, before the first magnetic conductor 3a
Width is equal with the distance between the first giant magnetoresistance 4a lateral surfaces and the 3rd giant magnetoresistance 4c lateral surfaces afterwards or is wider than outside both
The distance between side；
Metal enclosed body 1 on the right side of first giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c is internally provided with the first bar magnet 2b,
First bar magnet 2b is located on the center line between the first giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c；
Second bar magnet 2c is identical with the direction where the first bar magnet 2b magnetic pole, the second giant magnetoresistance positioned at bottom
4b, the 4th giant magnetoresistance 4d and the second bar magnet 2c by the flat 3rd magnetic conductor 3c positioned at middle part, with positioned at upper
First giant magnetoresistance 4a, the 3rd giant magnetoresistance 4c in portion and the first bar magnet 2b are spaced apart, flat 3rd magnetic conductor 3c
All around four walls are connected with metal enclosed body 1, by whole metal enclosed body 1 be divided into above and below two independent spaces；
First giant magnetoresistance 4a, the second giant magnetoresistance 4b, the 3rd giant magnetoresistance 4c and the 4th giant magnetoresistance 4d constitute differential full-bridge；
First giant magnetoresistance 4a one end is connected to form A tie points with the 4th giant magnetoresistance 4d one end by lead, and second
Giant magnetoresistance 4b one end is connected to form C tie points with the 3rd giant magnetoresistance 4c one end by lead, the first giant magnetoresistance
The 4a other end and the second giant magnetoresistance 4b other end are connected to form B tie points by lead, the 3rd giant magnetoresistance 4c's
The other end and the 4th giant magnetoresistance the 4d other end are by lead formation D tie points, and A tie points and C tie points are respectively connecting to
The internal dc source U of metal enclosed body 1 both positive and negative polarity, B tie points and D tie points pass through lead formation output end Uo, output end
Uo access differentials amplification circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit module, by comparison circuit
Module output end is connected with storage tester 6；
The triggering method is by U-shaped magnet 2a two magnetic poles gold relative with the second magnetic conductor 3b with the first magnetic conductor 3a respectively
Belong to the outer wall of obturator 1 close, to being applied with a magnetic signal inside metal enclosed body 1 so that positioned at the 3rd magnetic conductor 3c bottoms
Increase with the resistance of the one of which giant magnetoresistance on top, the resistance of another set giant magnetoresistance reduces, and giant magnetoresistance resistance becomes
Change the resistance signal formed and voltage output signal be converted into by differential bridge, voltage output signal by differential amplification, blocking,
Amplification filtering, compare and obtain by the voltage signal of low transition to high level, i.e., the storage startup of tester 6 can be caused to trigger
Voltage signal, realize to store tester 6 triggering.
Specifically, the first magnetic conductor 3a, the second magnetic conductor 3b, the first giant magnetoresistance 4a, the second giant magnetoresistance 4b,
Three giant magnetoresistance 4c, the 4th giant magnetoresistance 4d, the first bar magnet 2b, the second bar magnet 2c, the 3rd magnetic conductor 3c, difference are put
Big circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit module and storage tester 6 are by non-
Permeability magnetic material is fixed on inside metal enclosed body 1.The supporter 5a of each non-magnet material as illustrated in fig. 1 and 2,5b, 5c,
5d, 5e, 5f, 5g, 5h, 5i, 5j, 5k, 5l are by each giant magnetoresistance, magnetic conductor and magnet support inside metal enclosed body 1.When
So non-magnet material is filled with order to play a part of the clearance spaces inside damping, metal enclosed body 1.
The mounting means of the above-mentioned all parts of the present invention never only only has said structure, as long as each part can be consolidated
Dingan County all can be used loaded on the mounting means inside metal enclosed body 1, and used mounting structure（Equivalent to supporter）
It need to be non-magnet material.Specifically, such as the first magnetic conductor 3a and the second magnetic conductor 3b can be by the viscose classes of non-magnet material
Material is fixedly installed on the inwall of metal enclosed body 1, and each giant magnetoresistance, magnetic conductor and magnet support are in metal enclosed body 1
Behind portion, in order to play cushioning effect, it can also be fixedly installed in by the glutinous gelatin substance of non-magnet material on mounting structure.
It is preferred that, U-shaped magnet 2a is permanent magnet or electromagnet, and the first bar magnet 2b and the second bar magnet 2c is forever
Long magnet.
When it is implemented, can be by as shown in Figure 5 or Figure 6, in differential full-bridge, the first giant magnetoresistance 4a respectively and draws
Line y1, lead y2 are connected, and the second giant magnetoresistance 4b is connected with lead y3, lead y4 respectively, the 3rd giant magnetoresistance 4c difference
It is connected with lead y5, lead y6, the 4th giant magnetoresistance 4d is connected with lead y7, lead y8 respectively, lead y1 and lead y8
A tie points are intersected at, lead y2 and lead y3 intersect at B tie points, and lead y4 and lead y5 intersect at C tie points, lead y6
D tie points are intersected at lead y7, draw lead y9, C tie point extraction lead y10 from A tie points is connected to metal enclosed respectively
The internal dc source U of body 1（Lithium battery）Both positive and negative polarity, draw lead y12, D tie point from B tie points and draw lead y11 conducts
Output end Uo, it is electric that two leads are respectively connected to differential amplifier circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison
Road module, the saltus step by low level to high level of comparison circuit module output is used for the triggering to storing tester 6.
Lead y1, y2, y3, y4, y5, y6, y7, y8, y9, y10, y11 and y12 of the present invention is metallic conductor lead；It is defeated
Go out signal and pass through metal lead wire and Uo differential amplifier circuits module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit
Module is connected, and comparison circuit output low level is connected to storage tester to high level signal by metal lead wire.
When needing to trigger the storage tester 6 inside metal enclosed body 1, U-shaped magnet 2a two magnetic poles are leaned on
Outside nearly metal enclosed body 1（First magnetic conductor 3a and the second magnetic conductor 3b just to position）, i.e., metal enclosed body 1 is applied with
One magnetic signal；When U-shaped magnet 2a above S poles, lower N extreme directions are placed, although magnetic signal is shielded by metal shield
Act on and decay, but metal enclosed body sidewall has faint magnetic signal, wherein faint magnetic signal passes through the first magnetic conductor 3a
Realize that the magnetic line of force is converged with the second magnetic conductor 3b；According to the characteristic of giant magnetoresistance（There is faint changes of magnetic field to cause resistance
The drastically change of size, its Amplitude Ratio changed is generally high more than ten times, and increase magnetic field intensity giant magnetoresistance is strongly reduced, and weakens magnetic
Field intensity giant magnetoresistance increased dramatically）, it is placed between U-shaped magnet 2a and the first bar magnet 2b, the second bar magnet 2c
The resistance of each giant magnetoresistance drastically changes；When the direction that the first bar magnet 2b on the 3rd magnetic conductor 3c tops is the ultra-Right N poles of left S
During placement, i.e., the first bar magnet 2b S poles are extremely relative with U-shaped magnet 2a S, now U-shaped magnet 2a and the first bar magnet
2b produces mutually exclusive effect, the magnetic induction line between it be it is upward arranged with downward diverging, i.e., U-shaped magnet 2a and first
Magnetic strength line density between shape magnet 2b is sparse, magnetic field intensity weaken so that the 3rd magnetic conductor 3c tops, positioned at U-shaped magnetic
The resistance of the first giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c between iron 2a and the first bar magnet 2b increased dramatically；Meanwhile,
When the second bar magnet 2c of the 3rd magnetic conductor 3c bottoms places for the direction of the ultra-Right N poles of left S, i.e. the second bar magnet 2c's
S poles are extremely relative with U-shaped magnet 2a N, and now U-shaped magnet 2a and the second bar magnet 2c produce the effect attracted each other, its it
Between magnetic induction line be convergence, i.e., the magnetic strength line density comparatively dense between U-shaped magnet 2a and the second bar magnet 2c, magnetic field intensity
Enhancing so that the 3rd magnetic conductor 3c bottoms, the second giant magnetoresistance 4b between U-shaped magnet 2a and the second bar magnet 2c
Strongly reduced with the 4th giant magnetoresistance 4d resistance.So it is converted into by four giant magnetoresistance resistance signals jumpy sensitive
The high voltage output signal of degree, constitutes differential full-bridge（As shown in Figure 4）.
Similarly, when U-shaped magnet 2a above N extremely descends S extreme directions to place, and the first bar magnet inside metal enclosed body
When the position of 2b and the second bar magnet 2c placements and constant polarity, the giant magnetoresistance change in resistance according to caused by magnetic signal, production
A kind of raw relative differential full bridge formation when extremely descending N poles with S on U-shaped magnet 2a.It is strong that magnetic signal generation device sends certain magnetic field
The magnetic signal of degree, due to the shielding action of metal shield（But it is only that the amplitude fading of magnetic signal is non-fully shielded
Fall）, the magnetic signal by the side wall of metal enclosed body 1 is very faint, and the first magnetic conductor 3a and the second magnetic conductor 3b have the magnetic line of force
Convergence is acted on, and faint magnetic signal realizes that the magnetic line of force is converged by the first magnetic conductor 3a and the second magnetic conductor 3b；According to huge magnetoelectricity
The characteristic of resistance, the resistance for each giant magnetoresistance being placed between U-shaped magnet 2a and the first bar magnet 2b, the second bar magnet 2c
Drastically change.When the first bar magnet 2b on the 3rd magnetic conductor 3c tops places for the direction of the ultra-Right N poles of left S, i.e., first
Shape magnet 2b S poles are extremely relative with U-shaped magnet 2a N, and now U-shaped magnet 2a and the first bar magnet 2b produces what is attracted each other
Effect, the magnetic induction line between it is convergence, i.e., the magnetic strength line density between U-shaped magnet 2a and the first bar magnet 2b is closeer
Collection, magnetic field intensity enhancing so that the 3rd magnetic conductor 3c tops, between U-shaped magnet 2a and the first bar magnet 2b the
One giant magnetoresistance 4a and the 3rd giant magnetoresistance 4c resistance is strongly reduced；Meanwhile, when the second bar shaped of the 3rd magnetic conductor 3c bottoms
When magnet 2c places for the direction of the ultra-Right N poles of left S, i.e., the second bar magnet 2c S poles are extremely relative with U-shaped magnet 2a S, now
U-shaped magnet 2a and the second bar magnet 2c produces mutually exclusive effect, and the magnetic induction line between it is that upward and downward diverging is arranged
Cloth, i.e., the magnetic strength line density between U-shaped magnet 2a and the second bar magnet 2c is sparse, and magnetic field intensity weakens so that the 3rd
Magnetic conductor 3c bottoms, the second giant magnetoresistance 4b and the 4th huge magnetoelectricity between U-shaped magnet 2a and the second bar magnet 2c
Resistance 4d resistance increased dramatically.It is defeated so the high voltage of sensitivity to be converted into by four giant magnetoresistance resistance signals jumpy
Go out signal, constitute differential full-bridge（As shown in Figure 5）.
Differential full-bridge can be according to the variable quantity of giant magnetoresistance, and sensitivity relative to wheatstone bridge its change improves 4 times.
Wherein, it is desirable to which the magnetic signal strength given allows the magnetic field intensity of change to control in giant magnetoresistance in certain threshold range
In effective excursion.From the output end of differential full-bridge draw two leads be respectively connected to differential amplifier circuit module, electric capacity every
Straight module, filtering and amplifying circuit module, comparison circuit module, the voltage that sensitivity is high, amplitude of variation is big of differential full-bridge output
Processing of the signal Jing Guo differential amplifier circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit module is obtained
Easily cause the voltage signal of level trigger saltus step, i.e., storage tester 6 can be caused to start the magnitude of voltage of triggering（This magnitude of voltage
It is greater than default trigger voltage threshold value）.The output lead of comparison circuit is connected with storage tester 6, differential full-bridge
The signal that the sensitivity of output is high, amplitude of variation is big passes through differential amplifier circuit module, electric capacity blocking module, amplification, filtered electrical
The triggering to storing tester 6 is realized in road module, comparison circuit module output by low transition to high level（Start）Go forward side by side
The work of row next step.When storage tester 6 is finished to dynamic parametric test, it is drawn off from corresponding device, and carry out
The analysis and processing of interior data.
By the design of above triggering device, the reliable triggering to storing tester 6 is realized.The voltage of differential full-bridge output
Signal passes through differential amplifier circuit module, and electric capacity blocking module is amplified, filter circuit module process block is those skilled in the art
Known.
Differential amplifier circuit module is realized that electric capacity blocking module is that a ceramic disc capacitor is believed for direct current by instrument amplifier
Number cut-off, by causing the Dynamic Signal that magnetic resistance change rate and then differential bridge are exported due to magnet, i.e., by low transition to high
The signal of level change can only be produced when U-shaped magnet is close to this event generation of metal enclosed body, to prevent false triggering；Put
Greatly, filter circuit module is by voltage controlled voltage source second-order low-pass filter circuit realiration, and comparison circuit is realized by comparator, these technologies
It is well known to those skilled in the art.
In addition, during concrete application, each giant magnetoresistance will use up with the distance between the first magnetic conductor 3a and the second magnetic conductor 3b
Amount is pressed close to, but can not be contacted；The distance between first bar magnet 2b and the second bar magnet 2c and each giant magnetoresistance also will
Try one's best, but can not contact.All around four walls are connected the flat 3rd magnetic conductor 3c with metal enclosed body 1,
By whole metal enclosed body 1 be divided into above and below two independent spaces, will up and down two field regions be spaced apart, above and below reduction
Influence between two field regions.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (4)
1. the metal enclosed internal test instrument triggering method based on giant magnetoresistance effect, it is characterised in that the triggering method is to pass through
What triggering device was realized,
The triggering device includes being arranged at metal enclosed body（1）U-shaped magnet on the left of outer wall（2a）, U-shaped magnet（2a）Two
Individual magnetic pole is towards metal enclosed body（1）, with U-shaped magnet（2a）The relative metal enclosed body of two magnetic poles（1）Inwall left surface
On the first magnetic conductor is installed（3a）With the second magnetic conductor（3b）；
Metal enclosed body（1）Internal and the second magnetic conductor（3b）Middle part level it is relative be provided with the second giant magnetoresistance（4b）With
Four giant magnetoresistances（4d）, the second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）It is front and rear respectively parallel to be arranged side by side and both it
Between there is spacing, the second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）Horizontal center line be located in same level, the
Two magnetic conductors（3b）Bottom surface and the second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）Bottom surface in same level or
Less than both floor heights, the second magnetic conductor（3b）Front and rear width and the second giant magnetoresistance（4b）Lateral surface and the 4th huge magnetic
Resistance（4d）The distance between lateral surface is equal or is wider than the distance between both lateral surfaces, the second magnetic conductor（3b）Level in
Heart line and the second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）Between center line in same level；
Second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）The metal enclosed body on right side（1）It is internally provided with the second bar shaped magnetic
Iron（2c）, the second bar magnet（2c）Positioned at the second giant magnetoresistance（4b）With the 4th giant magnetoresistance（4d）Between center line on；
Metal enclosed body（1）Internal and the first magnetic conductor（3a）Middle part level it is relative be provided with the first giant magnetoresistance（4a）With
Three giant magnetoresistances（4c）, the first giant magnetoresistance（4a）With the 3rd giant magnetoresistance（4c）It is front and rear respectively parallel to be arranged side by side and both it
Between there is spacing, the first giant magnetoresistance（4a）With the 3rd giant magnetoresistance（4c）Horizontal center line be located in same level, the
One giant magnetoresistance（4a）In metal enclosed body（1）Position all around and the second giant magnetoresistance where inside（4b）It is identical, the
Three giant magnetoresistances（4c）In metal enclosed body（1）Position all around and the 4th giant magnetoresistance where inside（4d）It is identical, the
One magnetic conductor（3a）Top surface and the first giant magnetoresistance（4a）With the 3rd giant magnetoresistance（4c）Top surface in same level or
Higher than both floor heights, the first magnetic conductor（3a）Front and rear width and the first giant magnetoresistance（4a）Lateral surface and the 3rd huge magnetic
Resistance（4c）The distance between lateral surface is equal or is wider than the distance between both lateral surfaces；
First giant magnetoresistance（4a）With the 3rd giant magnetoresistance（4c）The metal enclosed body on right side（1）It is internally provided with the first bar shaped magnetic
Iron（2b）, the first bar magnet（2b）Positioned at the first giant magnetoresistance（4a）With the 3rd giant magnetoresistance（4c）Between center line on；
Second bar magnet（2c）With the first bar magnet（2b）Magnetic pole where direction it is identical, the second huge magnetic positioned at bottom
Resistance（4b）, the 4th giant magnetoresistance（4d）With the second bar magnet（2c）Pass through flat 3rd magnetic conductor positioned at middle part
（3c）And superposed first giant magnetoresistance（4a）, the 3rd giant magnetoresistance（4c）With the first bar magnet（2b）It is spaced apart, puts down
3rd magnetic conductor of tabular（3c）With metal enclosed body（1）All around four walls are connected, by whole metal enclosed body（1）Average mark
Into two independent spaces up and down；
First giant magnetoresistance（4a）, the second giant magnetoresistance（4b）, the 3rd giant magnetoresistance（4c）With the 4th giant magnetoresistance（4d）Constitute
Differential full-bridge；
First giant magnetoresistance（4a）One end and the 4th giant magnetoresistance（4d）One end be connected to form A tie points by lead,
Second giant magnetoresistance（4b）One end and the 3rd giant magnetoresistance（4c）One end be connected to form C tie points, first by lead
Giant magnetoresistance（4a）The other end and the second giant magnetoresistance（4b）The other end be connected to form B tie points, the 3rd by lead
Giant magnetoresistance（4c）The other end and the 4th giant magnetoresistance（4d）The other end pass through lead formation D tie points, A tie points and C
Tie point is respectively connecting to metal enclosed body（1）Internal dc source U both positive and negative polarity, B tie points and D tie points pass through lead shape
Into output end Uo, output end Uo access differentials amplification circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison are electric
Road module, by comparison circuit module output end and storage tester（6）It is connected；
The triggering method is by U-shaped magnet（2a）Two magnetic poles respectively with the first magnetic conductor（3a）With the second magnetic conductor（3b）Phase
To metal enclosed body（1）Outer wall is close, to metal enclosed body（1）Inside is applied with a magnetic signal so that led positioned at the 3rd
Magnet（3c）The resistance increase of the one of which giant magnetoresistance on bottom and top, the resistance of another set giant magnetoresistance reduces, huge
The resistance signal of magneto-resistor change in resistance formation is converted into voltage output signal by differential bridge, and voltage output signal is by poor
Point amplification, blocking, amplification filtering, compare and obtain by the voltage signal of low transition to high level, i.e., can cause and store survey
Try instrument（6）Start the voltage signal of triggering, realize to storage tester（6）Triggering.
2. the metal enclosed internal test instrument triggering method according to claim 1 based on giant magnetoresistance effect, its feature exists
In first magnetic conductor（3a）, the second magnetic conductor（3b）, the first giant magnetoresistance（4a）, the second giant magnetoresistance（4b）, it is the 3rd huge
Magneto-resistor（4c）, the 4th giant magnetoresistance（4d）, the first bar magnet（2b）, the second bar magnet（2c）, the 3rd magnetic conductor（3c）、
Differential amplifier circuit module, electric capacity blocking module, filtering and amplifying circuit module, comparison circuit module and storage tester（6）
It is that metal enclosed body is fixed on by non-magnet material（1）Internal.
3. the metal enclosed internal test instrument triggering method according to claim 1 or 2 based on giant magnetoresistance effect, its feature
It is, metal enclosed body（1）Internal clearance spaces are filled with non-magnet material.
4. the metal enclosed internal test instrument triggering method according to claim 3 based on giant magnetoresistance effect, its feature exists
In U-shaped magnet（2a）For electromagnet or permanent magnet, the first bar magnet（2b）With the second bar magnet（2c）For permanent magnetic
Iron.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117427919A (en) * | 2023-12-15 | 2024-01-23 | 上海高晶检测科技股份有限公司 | Metal detection method, channel type metal detection equipment and system |
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| CN2501256Y (en) * | 2001-10-24 | 2002-07-17 | 库万军 | Magnetosensitive approach switch |
| CN1794003A (en) * | 2005-11-02 | 2006-06-28 | 吉林大学珠海学院 | Strong magnetic impedance magnetic field sensor |
| CN200975992Y (en) * | 2006-11-01 | 2007-11-14 | 浙江大学 | Strong magnetic resistance sensor based vortex detecting device |
| CN203241111U (en) * | 2013-05-16 | 2013-10-16 | 长安大学 | Vehicle oil tank oil level detection device |
| CN105954806A (en) * | 2016-04-20 | 2016-09-21 | 上海海事大学 | Metal detection method and device based on giant magnetoresistance and orthogonal bias modulation |
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| CN2501256Y (en) * | 2001-10-24 | 2002-07-17 | 库万军 | Magnetosensitive approach switch |
| CN1794003A (en) * | 2005-11-02 | 2006-06-28 | 吉林大学珠海学院 | Strong magnetic impedance magnetic field sensor |
| CN200975992Y (en) * | 2006-11-01 | 2007-11-14 | 浙江大学 | Strong magnetic resistance sensor based vortex detecting device |
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| CN105954806A (en) * | 2016-04-20 | 2016-09-21 | 上海海事大学 | Metal detection method and device based on giant magnetoresistance and orthogonal bias modulation |
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