CN107219425B - A kind of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility - Google Patents
A kind of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility Download PDFInfo
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- CN107219425B CN107219425B CN201710446772.1A CN201710446772A CN107219425B CN 107219425 B CN107219425 B CN 107219425B CN 201710446772 A CN201710446772 A CN 201710446772A CN 107219425 B CN107219425 B CN 107219425B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 4
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- 230000006698 induction Effects 0.000 abstract description 6
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
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- 208000033748 Device issues Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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Abstract
The present invention is a kind of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility.The trigger device is that two magnetic poles of U-shaped magnet metal enclosed external wall opposite with the first magnetizer and the second magnetizer is close, to being applied with a magnetic signal inside metal enclosed body, so that the resistance value for being located at wherein one group of giant magnetoresistance on third magnetizer lower part and top increases, the resistance value of another set giant magnetoresistance reduces, the resistance signal that giant magnetoresistance change in resistance is formed is converted into voltage output signal, voltage output signal is by amplification, blocking, filtering, compare to obtain the voltage signal that low level jumps to high level, it can cause the voltage signal for storing tester starting triggering, realize the triggering to storage tester.The present invention using its by magnet it is intermediate polarity attract each other and repulsive interaction, adjust magnetic induction line density so that adjust magnetic field strength, allow to reliably adjust the sensitive variation of giant magnetoresistance.
Description
Technical field
It is triggered the present invention relates to a kind of using tester of the giant magnetoresistance effect to dormant state in metal enclosed body
Method, specifically a kind of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility.
Background technique
Currently, storage tester application field is very extensive, in the movement parts dynamic parametric test neck that signal transmission is difficult
Domain plays a crucial role.Tester live completion dynamic parametric test in real time is stored, is completed, takes out metal enclosed
Intracorporal storage tester, is analyzed and processed the data of acquisition.
Storage tester (such as: patent of invention-micro intelligent electronic tester-CN200910074322.X) generally adopt
With lithium battery power supply and nonvolatile storage for data, the working environment of small space and movement proposes storage tester
Very high micro-volume and low-power consumption requirement, are in particular in: the power consumption for storing tester is as low as possible and store tester
Adoption status design, i.e. storage tester is in Low-power-consumptiodormancy dormancy state before testing, when wait need to test, surveys to storage
One trigger signal (being equivalent to start command) of instrument is tried, storage tester is started to work, and realizes that the dynamic parameter of measurand is surveyed
Examination, task to be tested finish (condition for meeting setting data capacity or setting time), store tester automatically into suspend mode
State；If repeatedly interval is tested, needs repeatedly to give storage one trigger signal (being equivalent to start command) of tester, realize more
Secondary wake-up.Therefore, it is storage that when storage tester, which starts to work depending on trigger signal (start command) namely trigger signal,
Unique start command that tester is started to work, there can be no do not trigger (also referred to as when needing to start storage tester
Not triggering when should trigger), storage tester triggers and (also referred to as should not when can not occur not needing triggering
False triggering when triggering), then, must trigger, can not false triggering, correctly reliably triggering be storage tester it is normal
A key technology of work.
The triggering method of storage tester generally has: clocked flip (thinks that event occurs to get arriving more than setting time
Unique start command), internal trigger (judge whether comparison signal is greater than predetermined threshold, if signal be greater than predetermined threshold i.e. think
Event occur to get arrive unique start command), external trigger (receive extraneous trigger signal think event generation to get arrive only
One start command).For general common 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 transmitting of the signals such as electricity, heat, light, sound, using limited；Although metal
Obturator has certain shielding action to magnetic field, but only to magnetic signal amplitude fading, can will be outside metal enclosed body
Magnetic signal is transmitted to metal enclosed body inside, and (open source information and practical experience show that the shield effectiveness of metal shield cannot reach
Magnetic field strength decays to zero stage).Then the present invention realizes metal using giant magnetoresistance to the sensitivity response of faint magnetic signal
The triggering of storage tester in obturator.
Summary of the invention
The present invention is difficult to effective Trigger Problems to solve storage tester in metal enclosed body, provides a kind of based on huge
The triggering method of the metal enclosed internal test instrument of magnetoresistance.
The present invention is achieved through the following technical solutions: surveying in a kind of metal enclosed body based on giant magnetoresistance magnetic susceptibility
Instrument trigger device is tried, the trigger device includes the U-shaped magnet being set on the left of the external wall of metal enclosed, and two of U-shaped magnet
Magnetic pole is equipped with first on the left side metal enclosed body Nei Bi opposite with two magnetic poles of U-shaped magnet towards metal enclosed body
Magnetizer and the second magnetizer；
What level was opposite in the middle part of metal enclosed body inside and the second magnetizer is provided with the second giant magnetoresistance and the 4th huge magnetic
Front and back is parallel arranged side by side respectively and there is spacing between the two for resistance, the second giant magnetoresistance and the 4th giant magnetoresistance, and second is huge
The horizontal center line of magneto-resistor and the 4th giant magnetoresistance is located in same level, the bottom surface of the second magnetizer and the second huge magnetoelectricity
Floor height of the bottom surface of resistance and the 4th giant magnetoresistance in same level or lower than the two, the front and rear width of the second magnetizer
The distance between second giant magnetoresistance lateral surface and the 4th giant magnetoresistance lateral surface are equal or are wider than between the two lateral surface
Distance, the center line between the horizontal center line of the second magnetizer and the second giant magnetoresistance and the 4th giant magnetoresistance is in same level
In face；
Metal enclosed body on the right side of second giant magnetoresistance and the 4th giant magnetoresistance is internally provided with the second bar magnet, and second
Bar magnet is on the center line between the second giant magnetoresistance and the 4th giant magnetoresistance；
What level was opposite in the middle part of metal enclosed body inside and the first magnetizer is provided with the first giant magnetoresistance and the huge magnetic of third
Front and back is parallel arranged side by side respectively and there is spacing between the two for resistance, the first giant magnetoresistance and third giant magnetoresistance, and first is huge
The horizontal center line of magneto-resistor and third giant magnetoresistance is located in same level, and the first giant magnetoresistance is inside metal enclosed body
The position all around at place is identical as the second giant magnetoresistance, third giant magnetoresistance where inside the metal enclosed body before and after it is left
Right position is identical as the 4th giant magnetoresistance, and the top surface of the first magnetizer and the top surface of the first giant magnetoresistance and third giant magnetoresistance exist
Floor height in same level or higher than the two, the front and rear width of the first magnetizer and the first giant magnetoresistance lateral surface and the
The distance between three giant magnetoresistance lateral surfaces are equal or the distance between both are wider than lateral surface；
Metal enclosed body on the right side of first giant magnetoresistance and third giant magnetoresistance is internally provided with the first bar magnet, and first
Bar magnet is on the center line between the first giant magnetoresistance and third giant magnetoresistance；
Second bar magnet is identical as the direction where the magnetic pole of the first bar magnet, the second huge magnetoelectricity positioned at bottom
Resistance, the 4th giant magnetoresistance and the second bar magnet by being located at the flat third magnetizer at middle part, with superposed the
One giant magnetoresistance, third giant magnetoresistance and the first bar magnet are spaced apart, before flat third magnetizer and metal enclosed body
Four walls of left and right are connected afterwards, and entire metal enclosed body is divided into two independent spaces up and down；
First giant magnetoresistance, the second giant magnetoresistance, third giant magnetoresistance and the 4th giant magnetoresistance constitute differential full-bridge；
One end of first giant magnetoresistance is connected to form A tie point by lead with one end of the 4th giant magnetoresistance, and second
One end of giant magnetoresistance is connected to form C tie point by lead with one end of third giant magnetoresistance, the first giant magnetoresistance it is another
One end is connected to form B tie point by lead with the other end of the second giant magnetoresistance, the other end of third giant magnetoresistance and
The other end of four giant magnetoresistances forms D tie point by lead, and A tie point and C tie point are respectively connected in metal enclosed body
The positive and negative anodes of portion DC power supply U, B tie point and D tie point form output end Uo, the amplification of output end Uo access differential by lead
Circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison circuit module, by comparison circuit module output end with deposit
Storage tester is connected.
A kind of beneficial effect of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility of the present invention
Fruit is:
1. currently used storage tester is mounted in metal enclosed body, such storage tester adapts to complicated severe ring
Border, but metal enclosed body hinders the transmitting of the signals such as light, electricity, considers to survey using magnetic signal storage intracorporal to metal enclosed
Examination instrument is triggered.It is the amplitude fading to magnetic signal although metal enclosed body has decaying shielding action to magnetic signal,
So that it becomes faint magnetic signal, is not to mask magnetic signal completely, i.e., to the decaying of the magnetic signal amount of being rather than matter not
In the presence of therefore, the present invention solves the signal problem of transmission of metal enclosed inside and outside, realizes to metal enclosed body storage inside
The reliable triggering of tester；
2. using three magnet (a U-shaped magnet and two bar magnets), pass through intermediate polarity mutual of magnet using it
Attract and repulsive interaction, the density for adjusting magnetic induction line adjust magnetic field strength in turn, allows to reliably adjust huge magnetoelectricity
The sensitive variation of resistance；
3., with the magnetizer of high permeability, enhancing magnetic property using in low-intensity magnetic field, guaranteeing magnetic signal reliable delivery.
For example, the permalloy of soft magnetic materials, has high magnetic conductivity, low-loss and low coercivity in low-intensity magnetic field；
4. faint resistance variations (signal) are converted to voltage letter using the differential full bridge structure of giant magnetoresistance composition
Number.Sensitivity of the differential full bridge structure compared to its variation of wheatstone bridge improves 4 times, is a kind of highly accurate measurement method；
5. being triggered using giant magnetoresistance effect to closed intracorporal storage tester.Giant magnetoresistance can will be very small and weak
Changes of magnetic field causes the resistance variations of highly significant, and the Amplitude Ratio of variation is usually more than ten times high, and has small in size, sensitivity
Height, 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 is wide, high reliablity, it is at low cost the advantages that.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the overall structure diagram of storage tester trigger device in metal enclosed body.
Fig. 2 is cross-sectional view of the Fig. 1 in the direction A-A.
Fig. 3 is cross-sectional view of the Fig. 1 in the direction B-B.
Fig. 4 is differential full-bridge circuit figure when the above S of U-shaped magnet extremely descends the pole N to place.
Fig. 5 is differential full-bridge circuit figure when the above N of U-shaped magnet extremely descends the pole S to place.
Fig. 6 is the Uo signal of differential bridge output by amplification, circuit diagram (the known skill for blocking, filtering, comparing processing
Art).
In figure: 1- metal enclosed body, 2- magnet, 2a-U type magnet, the first bar magnet of 2b-, the second bar magnet of 2c-,
3- magnetizer, the first magnetizer of 3a-, the second magnetizer of 3b-, 3c- third magnetizer, 4- giant magnetoresistance, the huge magnetoelectricity of 4a- first
Resistance, the second giant magnetoresistance of 4b-, 4c- third giant magnetoresistance, the 4th giant magnetoresistance of 4d-, 5,5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h,
5i, 5j, 5k, 5l- supporter, 6- store tester, y1, y2, y3, y4, y5, y6, y7, y8, y9, y10, y11, y12- lead.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
With reference to the accompanying drawing to a kind of metal enclosed internal test instrument touching based on giant magnetoresistance magnetic susceptibility of the present invention
Transmitting apparatus is described in detail.
A kind of metal enclosed internal test instrument trigger device based on giant magnetoresistance magnetic susceptibility, the trigger device include setting
Two magnetic poles of the U-shaped magnet 2a being placed on the left of 1 outer wall of metal enclosed body, U-shaped magnet 2a are towards metal enclosed body 1, with U-shaped magnetic
Two magnetic poles of iron 2a are equipped with the first magnetizer 3a and the second magnetizer 3b on opposite 1 inner wall left side of metal enclosed body；
Inside metal enclosed body 1 and what the second middle part magnetizer 3b level was opposite is provided with the second giant magnetoresistance 4b and the 4th
Giant magnetoresistance 4d, the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d front and back is parallel respectively be arranged side by side and exist between the two between
Away from the horizontal center line of the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d are located in same level, the second magnetizer 3b's
The floor height of bottom surface and the bottom surface of the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d in same level or lower than the two,
The front and rear width of second magnetizer 3b and the distance between the second giant magnetoresistance 4b lateral surface and the 4th giant magnetoresistance 4d lateral surface
It is equal or the distance between both be wider than lateral surface, the horizontal center line of the second magnetizer 3b and the second giant magnetoresistance 4b and the 4th
Center line between giant magnetoresistance 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, the second bar magnet 2c are on the center line between the second giant magnetoresistance 4b and the 4th giant magnetoresistance 4d；
Inside metal enclosed body 1 and what the first middle part magnetizer 3a level was opposite is provided with the first giant magnetoresistance 4a and third
Front and back is parallel arranged side by side and between existing between the two respectively by giant magnetoresistance 4c, the first giant magnetoresistance 4a and third giant magnetoresistance 4c
Away from the horizontal center line of the first giant magnetoresistance 4a and third giant magnetoresistance 4c are located in same level, the first giant magnetoresistance 4a
Identical as the second giant magnetoresistance 4b in the position all around where 1 inside of metal enclosed body, third giant magnetoresistance 4c is in metal
Position all around where the inside of obturator 1 is identical as the 4th giant magnetoresistance 4d, the top surface of the first magnetizer 3a and first huge
Floor height of the top surface of magneto-resistor 4a and third giant magnetoresistance 4c in same level or higher than the two, the first magnetizer 3a
Front and rear width it is equal with the distance between the first giant magnetoresistance 4a lateral surface and third giant magnetoresistance 4c lateral surface or be wider than two
The distance between person's lateral surface；
Metal enclosed body 1 on the right side of first giant magnetoresistance 4a and third giant magnetoresistance 4c is internally provided with the first bar magnet
2b, the first bar magnet 2b are on the center line between the first giant magnetoresistance 4a and third giant magnetoresistance 4c；
Second bar magnet 2c is identical as the direction where the magnetic pole of the first bar magnet 2b, the second huge magnetic positioned at bottom
Resistance 4b, the 4th giant magnetoresistance 4d and the second bar magnet 2c by be located at middle part flat third magnetizer 3c and position
It is spaced apart in the first giant magnetoresistance 4a, the third giant magnetoresistance 4c on top and the first bar magnet 2b, flat third magnetic conduction
All around four walls are connected body 3c with metal enclosed body 1, and entire metal enclosed body 1 is divided into two independent skies up and down
Between；
First giant magnetoresistance 4a, the second giant magnetoresistance 4b, third giant magnetoresistance 4c and the 4th giant magnetoresistance 4d constitute differential
Full-bridge；
One end of first giant magnetoresistance 4a is connected to form A tie point by lead with one end of the 4th giant magnetoresistance 4d,
One end of second giant magnetoresistance 4b is connected to form C tie point by lead with one end of third giant magnetoresistance 4c, the first huge magnetic
The other end of the other end of resistance 4a and the second giant magnetoresistance 4b are connected to form B tie point, third giant magnetoresistance by lead
The other end of the other end of 4c and the 4th giant magnetoresistance 4d form D tie point by lead, and A tie point and C tie point connect respectively
It is connected to the positive and negative anodes of 1 internal dc source U of metal enclosed body, B tie point and D tie point and output end Uo is formed by lead, it is defeated
Outlet Uo access differential amplification circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison circuit module, will compare
Circuit module output end is connected with storage tester 6.
When specifically used, be by two magnetic poles of U-shaped magnet 2a respectively with the first magnetizer 3a and the second magnetizer 3b phase
Pair 1 outer wall of metal enclosed body it is close, to being applied with a magnetic signal inside metal enclosed body 1, so that being located at third magnetizer
The resistance value of wherein one group of giant magnetoresistance of the lower part 3c and top increases, and the resistance value of another set giant magnetoresistance reduces, giant magnetoresistance
The resistance signal that change in resistance is formed is converted into voltage output signal by differential bridge, and voltage output signal is put by difference
Greatly, blocking, amplification filter, compare to obtain the voltage signal for jumping to high level by low level, can cause to store tester 6
Start the voltage signal of triggering, realizes the triggering to storage tester 6.
Specifically, the first magnetizer 3a, the second magnetizer 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, third magnetizer 3c, difference are put
Big circuit module, capacitor 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.Supporter 5a, 5b of each non-magnet material as illustrated in fig. 1 and 2,5c,
5d, 5e, 5f, 5g, 5h, 5i, 5j, 5k, 5l are by each giant magnetoresistance, magnetizer and magnet support inside metal enclosed body 1.When
So in order to play the role of damping, the spare space inside metal enclosed body 1 is filled with non-magnet material.
The mounting means of the above-mentioned all parts of the present invention never only only has above structure, as long as can consolidate each component
Dingan County all can be used loaded on the mounting means inside metal enclosed body 1, and used mounting structure (being equivalent to supporter)
It need to be non-magnet material.Specifically, such as the first magnetizer 3a and the second magnetizer 3b can pass through the viscose class of non-magnet material
Substance is fixedly installed on 1 inner wall of metal enclosed body, and each giant magnetoresistance, magnetizer and magnet support are in metal enclosed body 1
Behind portion, in order to play cushioning effect, it can also be fixedly installed on mounting structure by the viscose substance of non-magnet material.
Preferably, U-shaped magnet 2a is permanent magnet or electromagnet, and the first bar magnet 2b and the second bar magnet 2c are 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, third 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 point is intersected at, lead y2 and lead y3 intersect at B tie point, and lead y4 and lead y5 intersect at C tie point, lead y6
D tie point is intersected at lead y7, lead y9, C tie point extraction lead y10 is drawn from A tie point and is connected to metal enclosed respectively
1 internal dc source U(lithium battery of body) positive and negative anodes, from B tie point draw lead y12, D tie point draw lead y11 conduct
Output end Uo, it is electric that two leads are respectively connected to differential amplifier circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison
Road module, the jump by low level to high level of comparison circuit module output is for the triggering to storage tester 6.
Lead y1, y2, y3, y4, y5, y6, y7, y8, y9, y10, y11 and y12 of the invention is metallic conductor lead；It is defeated
Signal Uo differential amplifier circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison circuit module are drawn by metal out
Line connection, comparison circuit export low level and are connected to storage tester by metal lead wire to high level signal.
When needing to trigger the storage tester 6 inside metal enclosed body 1, two magnetic poles of U-shaped magnet 2a are leaned on
Nearly 1 outside (position of the first magnetizer 3a and the second magnetizer 3b face) of metal enclosed body, i.e., be applied with metal enclosed body 1
One magnetic signal；When the above pole S U-shaped magnet 2a, lower N extreme direction are placed, although shielding of the magnetic signal by metal shield
It acts on and decays, but metal enclosed body sidewall has faint magnetic signal, wherein faint magnetic signal passes through the first magnetizer 3a
Magnetic line of force convergence is realized with the second magnetizer 3b；(there is faint changes of magnetic field that can lead to resistance according to the characteristic of giant magnetoresistance
The Amplitude Ratio of the change dramatically of size, variation is usually more than ten times high, increases magnetic field strength giant magnetoresistance and strongly reduces, 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 value change dramatically of each giant magnetoresistance；When the direction that the first bar magnet 2b on the top third magnetizer 3c is the ultra-Right pole N left S
When placement, i.e., the pole S of the first bar magnet 2b is extremely opposite with the S of U-shaped magnet 2a, at this time U-shaped magnet 2a and the first bar magnet
2b generates mutually exclusive effect, between magnetic induction line be the upward arrangement with downward diverging, i.e., U-shaped magnet 2a and first
Magnetic strength line density between shape magnet 2b is sparse, magnetic field strength weaken so that the top third magnetizer 3c, be located at U-shaped magnetic
The resistance value of the first giant magnetoresistance 4a and third giant magnetoresistance 4c between iron 2a and the first bar magnet 2b increased dramatically；Meanwhile
When the direction that the second bar magnet 2c of the lower part third magnetizer 3c is the ultra-Right pole N left S is placed, i.e. the second bar magnet 2c's
The pole S is extremely opposite with the N of U-shaped magnet 2a, and U-shaped magnet 2a and the second bar magnet 2c generates the effect to attract each other at this time, 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 strength
Enhancing, so that the lower part third magnetizer 3c, the second giant magnetoresistance 4b between U-shaped magnet 2a and the second bar magnet 2c
It is strongly reduced with the resistance value of the 4th giant magnetoresistance 4d.It is converted into this way by four giant magnetoresistance resistance signals jumpy sensitive
High voltage output signal is spent, differential full-bridge (as shown in Figure 4) is constituted.
Similarly, when the U-shaped above N of magnet 2a extremely descends S extreme direction to place, and the first bar magnet inside metal enclosed body
When the position of 2b and the second bar magnet 2c placement and constant polarity, the giant magnetoresistance change in resistance according to caused by magnetic signal is produced
A kind of raw opposite differential full bridge formation when extremely descending the pole N with S on U-shaped magnet 2a.It is strong that magnetic signal generation device issues certain magnetic field
The magnetic signal of degree, since the shielding action of metal shield (but is only non-fully to shield to the amplitude fading of magnetic signal
Fall), the magnetic signal by 1 side wall of metal enclosed body is very faint, and the first magnetizer 3a and the second magnetizer 3b have the magnetic line of force
Convergence effect, faint magnetic signal realize magnetic line of force convergence by the first magnetizer 3a and the second magnetizer 3b；According to huge magnetoelectricity
The characteristic of resistance is placed on the resistance value of each giant magnetoresistance between U-shaped magnet 2a and the first bar magnet 2b, the second bar magnet 2c
Change dramatically.When the direction that the first bar magnet 2b on the top third magnetizer 3c is the ultra-Right pole N left S is placed, i.e., first
The pole S of shape magnet 2b is extremely opposite with the N of U-shaped magnet 2a, what U-shaped magnet 2a and the first bar magnet 2b generation at this time attracted each other
Effect, between magnetic induction line be convergence, i.e., the magnetic strength line density between U-shaped magnet 2a and the first bar magnet 2b is closeer
Collection, magnetic field strength enhancing so that the top third magnetizer 3c, between U-shaped magnet 2a and the first bar magnet 2b the
The resistance value of one giant magnetoresistance 4a and third giant magnetoresistance 4c strongly reduce；Meanwhile when the second bar shaped of the lower part third magnetizer 3c
When magnet 2c is that the direction of the ultra-Right pole N left S is placed, i.e., the pole S of the second bar magnet 2c is extremely opposite with the S of U-shaped magnet 2a, at this time
U-shaped magnet 2a and the second bar magnet 2c generate mutually exclusive effect, between magnetic induction line be the upward row with downward diverging
Cloth, i.e., the magnetic strength line density between U-shaped magnet 2a and the second bar magnet 2c is sparse, and magnetic field strength weakens, so that third
The lower part magnetizer 3c, the second giant magnetoresistance 4b and the 4th huge magnetoelectricity between U-shaped magnet 2a and the second bar magnet 2c
The resistance value of resistance 4d increased dramatically.The voltage for being converted into high sensitivity by four giant magnetoresistance resistance signals jumpy in this way is defeated
Signal out constitutes differential full-bridge (as shown in Figure 5).
Differential full-bridge can be according to the variable quantity of giant magnetoresistance, and relative to wheatstone bridge, its sensitivity changed improves 4 times.
Wherein, it is desirable that the magnetic signal strength given can control changing magnetic field intensity in giant magnetoresistance in certain threshold range
In effective variation range.From the output end of differential full-bridge draw two leads be respectively connected to differential amplifier circuit module, capacitor every
Straight module, filtering and amplifying circuit module, comparison circuit module, the big voltage of high sensitivity, the amplitude of variation of differential full-bridge output
Processing of the signal Jing Guo differential amplifier circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison circuit module obtains
The voltage signal for easily causing level trigger to jump can cause voltage value (this voltage value for storing the starting triggering of tester 6
It is greater than preset trigger voltage threshold value).The output lead of comparison circuit is connected with storage tester 6, differential full-bridge
The big signal of high sensitivity, the amplitude of variation of output passes through differential amplifier circuit module, capacitor blocking module, amplification, filtered electrical
Road module, the output of comparison circuit module jump to high level by low level and realize that the triggering (starting) to storage tester 6 is gone forward side by side
The work of row next step.Dynamic parametric test is finished when storing tester 6, is drawn off from corresponding device, and carry out
The analysis and processing of interior data.
By the design of the above trigger device, the reliable triggering to storage tester 6 is realized.The voltage of differential full-bridge output
Signal passes through differential amplifier circuit module, and capacitor blocking module, amplification, filter circuit module process block are those skilled in the art
Known.
Differential amplifier circuit module is realized that capacitor blocking module is that a ceramic disc capacitor is believed for direct current by instrument amplifier
Number partition, by since magnet causes magnetic resistance change rate and then differential bridge output Dynamic Signal, i.e., height is jumped to by low level
The signal of level change can only be generated when U-shaped magnet occurs close to this event of metal enclosed body, to prevent false triggering；It puts
Greatly, filter circuit module is realized by voltage controlled voltage source second-order low-pass filter circuit, and comparison circuit is realized by comparator, these technologies
It is well known to those skilled in the art.
In addition, each giant magnetoresistance will use up with the distance between the first magnetizer 3a and the second magnetizer 3b when concrete application
Amount is close to but cannot contacting；First bar magnet 2b and the distance between the second bar magnet 2c and each giant magnetoresistance are also wanted
As far as possible close to but cannot contacting.All around four walls are connected the flat third magnetizer 3c with metal enclosed body 1,
Entire metal enclosed body 1 is divided into two independent spaces up and down, upper and lower two field regions are spaced apart, are reduced up and down
Influence between two field regions.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is 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. storing tester trigger device in a kind of metal enclosed body based on giant magnetoresistance magnetic susceptibility, which is characterized in that
The trigger device includes being set to U-shaped magnet (2a) on the left of metal enclosed body (1) outer wall, and the two of U-shaped magnet (2a)
A magnetic pole is towards metal enclosed body (1), metal enclosed body (1) inner wall left side opposite with two magnetic poles of U-shaped magnet (2a)
On the first magnetizer (3a) and the second magnetizer (3b) are installed；
Metal enclosed body (1) is internal opposite to be provided with the second giant magnetoresistance (4b) and the with horizontal in the middle part of the second magnetizer (3b)
Four giant magnetoresistances (4d), the second giant magnetoresistance (4b) and the 4th giant magnetoresistance (4d) respectively the parallel arranged side by side and the two in front and back it
Between there are spacing, the horizontal center line of the second giant magnetoresistance (4b) and the 4th giant magnetoresistance (4d) is located in same level,
The bottom surfaces of two magnetizers (3b) and the bottom surface of the second giant magnetoresistance (4b) and the 4th giant magnetoresistance (4d) in same level or
Lower than the floor height of the two, the front and rear width and the second giant magnetoresistance (4b) lateral surface and the 4th huge magnetic of the second magnetizer (3b)
The distance between resistance (4d) lateral surface is equal or the distance between both is wider than lateral surface, in the level of the second magnetizer (3b)
Center line between heart line and the second giant magnetoresistance (4b) and the 4th giant magnetoresistance (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 shaped magnetic
Iron (2c), the second bar magnet (2c) is on the center line between the second giant magnetoresistance (4b) and the 4th giant magnetoresistance (4d)；
Metal enclosed body (1) is internal opposite to be provided with the first giant magnetoresistance (4a) and the with horizontal in the middle part of the first magnetizer (3a)
Three giant magnetoresistances (4c), the first giant magnetoresistance (4a) and third giant magnetoresistance (4c) respectively the parallel arranged side by side and the two in front and back it
Between there are spacing, the horizontal center line of the first giant magnetoresistance (4a) and third giant magnetoresistance (4c) is located in same level,
Position all around where one giant magnetoresistance (4a) is internal in metal enclosed body (1) is identical as the second giant magnetoresistance (4b), the
Position all around where three giant magnetoresistances (4c) are internal in metal enclosed body (1) is identical as the 4th giant magnetoresistance (4d), the
The top surface of one magnetizer (3a) and the top surface of the first giant magnetoresistance (4a) and third giant magnetoresistance (4c) in same level or
Higher than the floor height of the two, the front and rear width and the first giant magnetoresistance (4a) lateral surface and the huge magnetic of third of the first magnetizer (3a)
The distance between resistance (4c) lateral surface is equal or the distance between both is wider than lateral surface；
Metal enclosed body (1) on the right side of first giant magnetoresistance (4a) and third giant magnetoresistance (4c) is internally provided with the first bar shaped magnetic
Iron (2b), the first bar magnet (2b) is on the center line between the first giant magnetoresistance (4a) and third giant magnetoresistance (4c)；
Second bar magnet (2c) is identical as the direction where the magnetic pole of the first bar magnet (2b), the second huge magnetic positioned at bottom
Resistance (4b), the 4th giant magnetoresistance (4d) and the second bar magnet (2c) pass through the flat third magnetizer positioned at middle part
(3c) is spaced apart with superposed first giant magnetoresistance (4a), third giant magnetoresistance (4c) and the first bar magnet (2b), is put down
All around four walls are connected the third magnetizer (3c) of plate with metal enclosed body (1), by entire metal enclosed body (1) average mark
At upper and lower two independent spaces；
First giant magnetoresistance (4a), the second giant magnetoresistance (4b), third giant magnetoresistance (4c) and the 4th giant magnetoresistance (4d) are constituted
Differential full-bridge；
One end of first giant magnetoresistance (4a) is connected to form A tie point by lead with one end of the 4th giant magnetoresistance (4d),
One end of second giant magnetoresistance (4b) is connected to form C tie point by lead with one end of third giant magnetoresistance (4c), and first
The other end of giant magnetoresistance (4a) and the other end of the second giant magnetoresistance (4b) are connected to form B tie point, third by lead
The other end of the other end of giant magnetoresistance (4c) and the 4th giant magnetoresistance (4d) forms D tie point, A tie point and C by lead
Tie point is respectively connected to the positive and negative anodes of metal enclosed body (1) internal dc source U, and B tie point and D tie point pass through lead shape
At output end Uo, output end Uo access differential amplification circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison are electric
Comparison circuit module output end is connected by road module with storage tester (6).
2. storing tester triggering dress in a kind of metal enclosed body based on giant magnetoresistance magnetic susceptibility according to claim 1
It sets, which is characterized in that first magnetizer (3a), the second magnetizer (3b), the first giant magnetoresistance (4a), the second giant magnetoresistance
(4b), third giant magnetoresistance (4c), the 4th giant magnetoresistance (4d), the first bar magnet (2b), the second bar magnet (2c), third
It magnetizer (3c), differential amplifier circuit module, capacitor blocking module, filtering and amplifying circuit module, comparison circuit module and deposits
Storage tester (6) is that metal enclosed body (1) inside is fixed on by non-magnet material.
3. storing tester touching in a kind of metal enclosed body based on giant magnetoresistance magnetic susceptibility according to claim 1 or 2
Transmitting apparatus, which is characterized in that the internal spare space of metal enclosed body (1) is filled with non-magnet material.
4. storing tester triggering dress in a kind of metal enclosed body based on giant magnetoresistance magnetic susceptibility according to claim 3
It sets, which is characterized in that U-shaped magnet (2a) is electromagnet or permanent magnet, the first bar magnet (2b) and the second bar magnet
(2c) is permanent magnet.
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