CN103163559A - Moving object searching and positioning device - Google Patents
Moving object searching and positioning device Download PDFInfo
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- CN103163559A CN103163559A CN2013100478841A CN201310047884A CN103163559A CN 103163559 A CN103163559 A CN 103163559A CN 2013100478841 A CN2013100478841 A CN 2013100478841A CN 201310047884 A CN201310047884 A CN 201310047884A CN 103163559 A CN103163559 A CN 103163559A
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Abstract
A moving object searching and positioning device comprises a tracer permanent magnet and a magnetic resistance detector. The magnetic resistance detector comprises a power source P1, a magnetic resistance sensor unit 101, a digital-analog converter unit 102 and a central processing unit U1, wherein the power source P1 supplies power to the magnetic resistance sensor unit 101, the digital-analog converter unit 102 and the central processing unit U1, analog electric signals generated by the magnetic resistance sensor unit 101are converted by the digital-analog converter unit 102 into digital signals and then are transmitted to the central processing unit U1, the central processing unit U1 calculates and processes the digital signals and outputs the processing result, the tracer permanent magnet is independent from the magnetic resistance detector, and the magnetic resistance sensor unit 101 is inside the magnetic field of the tracer permanent magnet. According to the size of a moving object, a tracer permanent magnet of 0.1-5 cubic millimeters is selected, the tracer permanent magnet can be under 1 cubic millimeter and as small as 0.1 cubic millimeter, so that many small moving objects can be carried, and when the distance between the tracer permanent magnet carried by the moving object to be tested and a tester is 0-100 cm, the moving object can be identified.
Description
Technical field
The present invention relates to a kind of animal body Search and Orientation device.
Background technology
study at biologic test, agricultural production application, biological nature research, need in agricultural production and income animal is searched and locates, present searching and being positioned with than multi-method for animal, such as wireless location technology, implanted chip technology etc., but they have common characteristics to be exactly: chip volume is larger, generally be not less than 5 cubic millimeters, measuring distance is little, generally be not more than 10 centimetres, the tested biology larger for the animal body volume also can use, and for the tested biology of small volume, as: insect, because the volume of itself is little, body make-up is simply fragile, can't adopt methods such as following the tracks of chip to position.
The measurement of magnetic flux, magnetic flux density, magnetomotive force, magnetic field intensity etc. in space or magnetic material.It is one of content of magnetics measurement amount.The proportional relation of the magnetic flux density in space and magnetic field intensity, the measurement of space magnetic field intensity is in fact also the measurement of magnetic flux density.Thereby with the magnetic flux density that is actually of magnetometer survey;
The material phenomenon that resistivity changes in magnetic field is called magnetoresistance.For magnetic metals such as iron, cobalt, nickel and alloys thereof, when externally-applied magnetic field was parallel to magnet internal magnetization direction, resistance changed with externally-applied magnetic field hardly; When externally-applied magnetic field departed from the internal magnetization direction of metal, the resistance of this metalloid reduced, the anisotropic magneto-resistive effect of Here it is strong magnetic metal.
Summary of the invention
A kind of animal body Search and Orientation device utilizes magnetoresistance, replaces electronic tag with the spike permanent magnet, solves the limitation of electronic tag, improves and detects distance, facilitates toy to carry.
A kind of animal body Search and Orientation device comprises spike permanent magnet and magnetic resistance detector; The magnetic resistance detector comprises power supply, magnetoresistive transducer unit, digital to analog converter unit, central processing unit, power supply provides power supply to magnetoresistive transducer unit, digital to analog converter unit, central processing unit, the magnetoresistive transducer unit is made of magnetoresistive transducer, the analog electrical signal that magnetoresistive transducer generates becomes digital signal to pass to central processing unit through the digital to analog converter cell translation again, and central processing unit is exported result after to the supplied with digital signal calculation process from central processing unit; The spike permanent magnet independent outside the magnetic resistance detector and the magnetic fields of spike permanent magnet in the magnetoresistive transducer unit.
Above-mentioned a kind of animal body Search and Orientation device also comprises the sensor clear circuit that resets, sensor reset clear circuit and magnetoresistive transducer unit UNICOM, and power supply is to the sensor clear circuit power supply that resets.
Above-mentioned a kind of animal body Search and Orientation device also comprises PORT COM and/or memory, and PORT COM and/or memory are connected with central processing unit.
Above-mentioned a kind of animal body Search and Orientation device, described magnetoresistive transducer unit is one dimension magnetoresistive transducer or multidimensional magnetoresistive transducer; Described multidimensional magnetoresistive transducer comprises a plurality of magnetoresistive transducers, and described one dimension magnetoresistive transducer comprises a magnetoresistive transducer.
Above-mentioned a kind of animal body Search and Orientation device, described magnetoresistive transducer unit is three-dimensional magnetoresistive transducer, the magnetoresistive transducer and the magnetoresistive transducer of the X-axis axial distribution that level encapsulates and the magnetoresistive transducer of a Y-axis axial distribution that comprise the Z axis axial distribution of a vertical encapsulation, described X-axis, Y-axis, Z axis are three axles of three dimensions rectangular coordinate system.
Above-mentioned a kind of animal body Search and Orientation device, described spike permanent magnet are sheet or the block permanent magnetic material of 0.01-5 cubic millimeters.
Above-mentioned a kind of animal body Search and Orientation device, described spike permanent magnet are sheet or the block permanent magnetic material of 1 cubic millimeter.
Above-mentioned a kind of animal body Search and Orientation device also comprises display, and display is connected with central processing unit or is connected with central processing unit by PORT COM.
The above-mentioned described device of a kind of animal body Search and Orientation device comprises that also earth magnetism eliminates circuit, and earth magnetism is eliminated circuit and magnetoresistive transducer unit UNICOM.
Beneficial effect: a kind of animal body Search and Orientation device, can be according to the animal body body size, select the spike permanent magnet of respective volume, the spike permanent magnet can be below 1 cubic millimeter, I reaches 0.1 cubic millimeter, a lot of small-sized moving objects can be carried, simultaneously, according to different spike permanent magnets, the spike permanent magnet that tested animal body carries and tester distance can both be identified in 0 ~ 100cm scope.Can reach 10cm in 1 cubic millimeter of situation, a lot of insects can be carried.
Description of drawings:
Fig. 1: magnetic resistance detector structural representation logical diagram;
Fig. 2: three-dimensional magnetic resistance sensing station concerns schematic diagram;
Described in Fig. 3: embodiment 2, three-dimensional magnetoresistive transducer is placed in the box outer surface schematic diagram;
Described in Fig. 4: embodiment 2,4 magnetoresistive transducers are placed in the box outer surface schematic diagram;
Fig. 5: a kind of animal body Search and Orientation device logical organization schematic diagram;
P1-power supply, U1-central processing unit, U2-X-axis magnetoresistive transducer, U3-Y-axis magnetoresistive transducer, U4-Z axis magnetoresistive transducer, Ux-except U2, U3, other outside U4 pass magnetoresistive transducer, 100-spike permanent magnet, 101-magnetoresistive transducer unit, 102-digital to analog converter unit, 103-monitoring case, the magnetic field of 104-spike permanent magnet, the digital to analog converter that U5-is connected with the X-axis magnetoresistive transducer, the digital to analog converter of U6-be connected with the Y-axis magnetoresistive transducer, the digital to analog converter of U7-be connected with the Z axis magnetoresistive transducer, CON1-PORT COM, U9-PORT COM, X1-sensor clear circuit that resets, CRT-display.
Embodiment
In following examples with Apis mellifera or middle honeybee as tested animal body, according to the size of Apis mellifera or middle honeybee build, select the spike permanent magnet of 0.1-1.0 cubic millimeters to stick on belly or other positions of Apis mellifera.Monitoring case, tested casing refer to beehive or other casings.
Embodiment 1: a kind of animal body Search and Orientation device comprises spike permanent magnet (100) and magnetic resistance detector; The magnetic resistance detector comprises power supply P1, magnetoresistive transducer unit 101, digital to analog converter unit 102, central processing unit U1, power supply P1 provides power supply to magnetoresistive transducer unit 101, digital to analog converter unit 102, central processing unit U1, the analog electrical signal that magnetoresistive transducer unit 101 generates 102 converts digital signal to and passes to central processing unit U1 again through the digital to analog converter unit, and central processing unit U1 exports result central processing unit U1 after to the supplied with digital signal calculation process; Magnetoresistive transducer unit 101 spike permanent magnets are independent of outside the magnetic resistance detector and in 101 magnetic fields at the spike permanent magnet, magnetoresistive transducer unit (104).
The spike permanent magnet is fixed on tested animal body.
In embodiment 1, the analog electrical signal that magnetoresistive transducer unit 101 generates is passed to digital to analog converter unit 102 with wire and is converted digital signal to and pass to central processing unit U1 with data bus again.
The described a kind of animal body Search and Orientation device of embodiment 1 also comprises the sensor clear circuit X1 that resets, sensor reset clear circuit X1 and magnetoresistive transducer unit 101 UNICOMs, and power supply P1 is to the sensor clear circuit X1 power supply that resets.
The described a kind of animal body Search and Orientation device of embodiment 1 also comprises PORT COM CON1, and PORT COM CON1 is connected with central processing unit U1, and central processing unit U1 outputs to external-connection displayer with outer reason result through PORT COM CON1.
The described a kind of animal body Search and Orientation device of above-described embodiment comprises memory U9, and memory U9 is connected with central processing unit U1, and memory U9 is used for storage from the data of central processing unit U1 output.
In embodiment 1, can be 1 magnetoresistive transducer in magnetoresistive transducer unit 101, can be also a plurality of magnetoresistive transducers.
When magnetoresistive transducer is 1, as long as this magnetoresistive transducer enters the magnetic field range of spike permanent magnet, tested animal body drives the motion of spike permanent magnet or magnetoresistive transducer moves, as long as the relative spike permanent magnet motion of magnetoresistive transducer, under the magnetic fields of spike permanent magnet, resistance value in magnetoresistive transducer changes, magnetoresistive transducer is also just exported corresponding electric signal, this electric signal is through digital-to-analog conversion, central processing unit just can show by the pilot lamp that is connected with central processing unit after processing.
when the magnetoresistive transducer in magnetoresistive transducer unit 101 is 2, these two magnetoresistive transducers can be pressed different directions according to their polarity and arrange, and be packaged together, as long as these two magnetoresistive transducers enter the magnetic field range of spike permanent magnet, tested animal body drives the motion of spike permanent magnet or magnetoresistive transducer moves, as long as the relative spike permanent magnet motion of magnetoresistive transducer, under the magnetic fields of spike permanent magnet, resistance value in magnetoresistive transducer just changes, magnetoresistive transducer is also just exported corresponding electric signal, this electric signal is through digital-to-analog conversion, the input central processing unit, due to the variation of resistance in magnetoresistive transducer also because of the impact of magnetic field angle, after central processing unit is processed signal, the gained signal can be defeated by pilot lamp, demonstrate tested animal body just in the effective magnetic field scope of spike permanent magnet, or demonstrate the two dimensional motion track of the relative magnetoresistive transducer of tested animal body by display.
Described magnetoresistive transducer unit 101 is three-dimensional magnetoresistive transducer, namely when the magnetoresistive transducer in magnetoresistive transducer unit 101 is 3, the Z axis magnetoresistive transducer U4 and the X-axis magnetoresistive transducer U2 of the X-axis axial distribution that level encapsulates and the Y-axis magnetoresistive transducer U3 of a Y-axis axial distribution that comprise the Z axis axial distribution of a vertical encapsulation, described X-axis, Y-axis, Z axis are three axles of three dimensions rectangular coordinate system.Tested animal body drives the motion of spike permanent magnet or magnetoresistive transducer moves, as long as the relative magnetoresistive transducer motion of spike permanent magnet, under the magnetic fields of spike permanent magnet, resistance value in magnetoresistive transducer just changes, magnetoresistive transducer is also just exported corresponding electric signal, this electric signal is inputted central processing unit through digital-to-analog conversion; Due to the variation of resistance in magnetoresistive transducer also because of the impact of magnetic field angle, after central processing unit is processed signal, the gained signal can be defeated by pilot lamp, demonstrate tested animal body just in the effective magnetic field scope of spike permanent magnet, or demonstrate the 3 D motion trace of the relative magnetoresistive transducer of tested animal body by display.
embodiment 2: the basic structure of the present embodiment is with embodiment 1, difference is: monitored Apis mellifera is contained in a rectangular parallelepiped chest, first be stained with the permanent magnetism sheet of 0.5 cubic millimeter on the Apis mellifera health with glue, three magnetoresistive transducers of three-dimensional magnetoresistive transducer are encapsulation separately respectively also, during use, three magnetoresistive transducers are placed in respectively on three adjacent faces of casing, the output signal of magnetoresistive transducer (also can adopt optical fiber with order wire after digital to analog conversion, wireless other communication modes such as grade) be sent to central processing unit, central processing unit is carried out corresponding program input signal is processed, be defeated by display from central processing unit again after processing, or be defeated by reservoir and store.
In embodiment 2, monitoring case 103 other walls also can be laid magnetoresistive transducer outward.
In embodiment 2, magnetoresistive transducer can be placed on the inwall of monitoring case 103.
Because the anisotropic magneto-resistive effect of strong magnetic metal, the information working procedures such as effective range of the position of central processor comprehensive magnetoresistive transducer, polar orientation and spike magnetic field of permanent magnet just form the spatial positional information of Apis mellifera after to Electric signal processing.
Embodiment 3: the basic structure of the present embodiment is with embodiment 2, difference is: the volume of monitoring case 103 is larger, in its long (X-axis), wide (Y-axis), high (Z axis), a certain surpasses 20cm, or all surpasses 20cm, lays a magnetoresistive transducer every 20 cm on same axle.Can monitor like this event trace of the animal body in larger scope of activities.
Embodiment 4: the basic structure of the present embodiment is with embodiment 1, and difference is:
The magnetoresistive transducer that the present invention uses is made three-dimensional magnetic resistance microcircuit integrated chip by permalloy (iron-nickel alloy).It utilizes common semiconductor technology, and iron nickel alloy film is attached on silicon chip.The electricalresistivityρ of film (θ) depends on the angle theta between magnetization M and electric current I direction, has following relational expression
Wherein
,
Respectively that electric current I is parallel to M and the resistivity during perpendicular to M.When the length direction along the iron-nickel alloy band passes to certain DC current, and when applying an external magnetic field perpendicular to direction of current, the resistance of alloy band self can be given birth to larger variation, utilizes this variation of alloy band resistance, can measure the magnetic field size and Orientation.Designed two aluminum electric current bands when making simultaneously on silicon chip, one is set and reset strap, and this sensor runs into high-intensity magnetic field when induction, will produce the magnetic domain saturated phenomenon, also can be used for set or the polarity that resets; Another is the bias magnetic field band, and for generation of a bias magnetic field, the low-intensity magnetic field part in compensate for ambient magnetic field (when externally-applied magnetic field was weak, the magnetic resistance relative changing value became quadratic relationship with magnetic induction density) makes magnetoresistive transducer output display linear relationship.
Magnetic field sensor (U3) and horizontal encapsulated sensor (U2, U4) that three-dimensional magnetoresistive transducer is a kind of vertical encapsulation form: it can measure the magnetic field with pin parallel direction and vertical direction.Sensor forms a nonequilibrium bridge by four iron-nickel alloy magneto-resistors, and nonequilibrium bridge efferent tap integrated operational amplifier amplifies output with signal.Because four magneto-resistor direction of current of suitably configuration are not identical, when having external magnetic field, cause that resistance change has to increase to have to subtract.Thereby output voltage U out can be expressed as with following formula
For certain operating voltage, as Ub=5.00V, the magnetic induction density of three-dimensional magnetic resistance sensor output voltage Uout and external magnetic field is proportional.It is 27uGauss that the present technology of three-dimensional magnetoresistive transducer can be sensed minimum-B configuration.
According to above-mentioned principle, a fritter permanent magnetic material is used Instant cement to be bonded in it insect with it insect.Whether can produce corresponding changes of magnetic field when insect is creeped, this device is recorded this variation, and indicate insect to exist by pilot lamp.
The type selecting of permanent magnetic material is wider, different permanent magnetic materials is influential to the scope of measuring, can select different permanent magnetic materials in different purposes, it is metal permanent magnetism that present permanent magnetic material is divided into aluminium nickel cobalt (AlNICo), first generation SMCo5 permanent magnet (being called 1:5 type samarium-cobalt alloy), second generation Sm2Co17 permanent magnet (being called 2:17 type samarium-cobalt alloy), third generation RE permanent magnetic alloy NdFeB (being called Nd Fe B alloys) etc.The size that the big or small Main Basis animal body of this material itself can bear is as the criterion, this material is more large more easily to be realized, this invention at present can realize being no more than 1mmx1mm, thickness is at the rare earth permanent-magnetic material of 1mm, and tested insect and tester can reach 20cm apart from 10cm(thickness at the rare earth permanent-magnetic material of 2mm) can both identify with interior.The material that adopts is different, the varying in size of material, and the shape of material is different, can obtain different measuring distances, satisfies different request for utilizations.
Three axle magnetoresistive transducers need to carry out digitizing could be processed by central processing unit, in order to save power consumption, has adopted single-chip microcomputer as primary processor in this invention here.Operation dominant frequency 24MHz realizes three-axle magnetic field intensity collection calculating, disturbs and suppresses, path computing, the functions such as indication as a result.(for different application, other model C PU also can use)
There is more difficult point in the space magnetic field measurement, geomagnetic noise, hardware noise, impact of the own attitude of surveying instrument etc.So adopted multiple spot filtering, differential filtering, the disposal routes such as cluster are eliminated corresponding impact.The back will be to geomagnetic noise, the hardware noise, and the processing of the attitude of surveying instrument own is set forth respectively.
The elimination of earth magnetism:
Because there is magnetic field in the earth itself, so this device need to be eliminated the impact of earth magnetism, eliminate circuit therefore designed earth magnetism in this device, if this main circuit produces enough high pressure, sensor is carried out initial reset.Measure and record the absolute force size, as the original levels threshold values, processor will adopt these data when carrying out real-time three axle parameter judgements.
The elimination of noise:
Adopt low-pass filter, the hardware measures such as capacitive bypass can be eliminated a part of noise, for the noise that power unit is introduced, adopt the method for software filtering to suppress.
The elimination of surveying instrument self attitude:
Due to the terrestrial magnetic field that exists around surveying instrument and the impact of ambient magnetic material, all there is impact in the variation of surveying instrument self attitude to last test result, therefore must eliminate these factors, require can not hand-held instrument to measure to avoid hand-held in the time of simultaneously-measured self attitude correction is had a negative impact.
The method of eliminating adopts real time data to follow the tracks of/manually start method of testing and eliminates.It is exactly that tester is measured in real time to three-dimensional field intensity that real time data is followed the tracks of, constantly revise according to current test data and test zero point, when manually starting test, recorded the data of one period long period, carry out vector and calculate when formal the measurement, eliminate self attitude misalignment.
Power management:
Because the occasion major part of using is all in the open air, therefore there is the problem of power management.Can only use dry cell or other rechargeable batteries as instrument power source, the more electric energy that during due to measurement, sensor need to consume, at present test is 100mA(0.5W approximately) left and right, therefore need to use high-capacity lithium battery approximately 4000mHA to guarantee to use time (as shown in (3)) of approximately 8 hours.
W=0.5*8=4000mAH (3)
Surveying instrument is on-the-spot to be used:
Surveying instrument is " L " shape, is buckled on tested casing, on test bracket, indicating device is housed, and can be LED, also LCD display can be installed, can also output test data by the communication port that carries on measuring instrument, facilitate the user to observe, obtain the insect locating information.
In the above-described embodiments, the central processing unit working procedure carries out the raw data conversion, data filtering, clustering processing, decision rule, data communication, non-point is rejected, and extra small signal amplifies, coordinate transform, the result indication also will be carried out ancillary control function, comprises the earth magnetism Processing for removing, reset processing, self check etc.Design of graphics picture even.Described display is LED light, CRT, the displays such as LCD, sound equipment, or intelligent terminal (comprising notebook computer, PC, intelligent machine/mobile phone etc.), reometer, voltage table etc.
[0041] surveying instrument profile:
Surveying instrument also can adopt other shapes, and the method for placement can adopt surveying instrument rack-mount, also can be bonded on the inwall or outer wall of detected space, or directly be placed on measure casing near.
The selection of surveying instrument power supply:
Dry cell, ni-mh, NI-G, plumbic acid, perhaps other direct supplys, battery capacity as required can be different.Also can use ac power supply, by the power supply changeover device of inside, or the external power source converter converts direct supply to for instrument.
The distributed measurement instrument connects:
When the space is larger, can adopt the distributed measurement mode, namely each measuring point is exactly a complete measurement mechanism/surveying instrument, carry out communication by wireless transmission method between them, can adopt multiple transmission system, WIFI, OFDM, MSK, FSK, GPRS etc., wired employing Rs232, RS485, CAN, FieldBus, the transmission technologys such as RS422 perhaps directly adopt proprietary by wire or custom protocol carries out interconnected and data communication.Each measuring point can be used as master control, also can an independent measuring point as master control, also can adopt external device (ED), as PC, notebook computer, panel computers (IPAD, Iphone, smart mobile phone etc.) etc. are as master control.
Embodiment 5: be that the spike permanent magnetism sheet that makes with RE permanent magnetic alloy NdFeB (being called again Nd Fe B alloys) of 10 cubic millimeters is made on the pin that the pin ring is fixed on tested homing pigeon with volume, magnetoresistive transducer is arranged on the wall of pigeon house, pigeon house inwall length and width are high is 2 meters, a magnetoresistive transducer is installed by central authorities at pigeon house, when homing pigeon drives the relative magnetoresistive transducer motion of spike permanent magnet, the magnetic field of spike permanent magnet changes and output electrical signals the resistance in magnetoresistive transducer, and this electric signal shows by reometer.Electric signal can demonstrate the time of homing pigeon discrepancy cage.
In embodiment 5: described current signal also can pass through light emitting diode, and voltage table, ohmmeter are made indicating device; Described electric signal also can through digital to analog conversion, be defeated by display, reservoir after central processing unit is processed.
embodiment 6: a kind of method of utilizing magnetoresistance Search and Orientation animal body, be that the spike permanent magnetism sheet that makes with RE permanent magnetic alloy NdFeB (being called again Nd Fe B alloys) of 5 cubic millimeters is made on the pin that the pin ring is fixed on tested homing pigeon with volume, magnetoresistive transducer is arranged on the wall of pigeon house, pigeon house inwall length and width are high is 1 meter, on six walls of pigeon house, a magnetoresistive transducer is installed respectively, when homing pigeon drives the relative magnetoresistive transducer motion of spike permanent magnet, the magnetic field of spike permanent magnet changes and output electrical signals the resistance in magnetoresistive transducer, these six magnetoresistive transducers are because of different with the distance of spike permanent magnet, the magnetic field of spike permanent magnet is also inconsistent to the action direction of each magnetoresistive transducer, the electric signal of each magnetoresistive transducer output is just different, electric signal is through digital-to-analog conversion, process through central processing unit again and just form the position of homing pigeon in pigeon house.Electric signal shows whether the magnetoresistive transducer in the magnetic resistance pick-up unit is in the magnetic field of spike permanent magnet.Anisotropic magneto-resistive effect according to strong magnetic metal, central processing unit carries out the raw data conversion to the electric signal of each sensor input, data filtering, clustering processing, decision rule, data communication, non-point is rejected, and extra small signal amplifies, coordinate transform, the result indication just can demonstrate the position of homing pigeon by display after the design of graphics picture.
In embodiment 6, pigeon house increases, and on some position when homing pigeon in pigeon house, when the distance of homing pigeon and immediate magnetoresistive transducer has surpassed the magnetic field effective range of spike permanent magnet, can increase magnetoresistive transducer in pigeon house.
By embodiment 5 and the described mode of example 6, not only can automatically gather the homing pigeon turnover cage time, also can record the active situation of homing pigeon in pigeon house.
In above-described embodiment, the electric signal of magnetoresistive transducer can adopt communication modes to be transferred to central processing unit after digital-to-analog conversion.
In the above-described embodiments, the central processing unit working procedure carries out the raw data conversion, data filtering, clustering processing, decision rule, data communication, non-point is rejected, and extra small signal amplifies, coordinate transform, the result indication also will be carried out ancillary control function, comprises the earth magnetism Processing for removing, reset processing, self check etc.Design of graphics picture even.Described display is LED light, CRT, the displays such as LCD, sound, or intelligent terminal (comprising notebook computer, PC, intelligent machine/mobile phone etc.).
Above-mentioned a kind of animal body Search and Orientation device is equipped with a plurality of magnetoresistive transducers and packaged three-dimensional magnetoresistive transducer, two-dimentional magnetoresistive transducer, can be equipped with 0.1-10(and be generally 0.1,0.3,0.5,0.8,1.0,1.5,3.0,5.0,10 cubic millimeters) cubic millimeter serial spike permanent magnet, for the user according to the monitoring space size, the carrying capacity of monitoring target, flexible choice is used in combination.
Claims (9)
1. an animal body Search and Orientation device, be characterised in that: comprise spike permanent magnet and magnetic resistance detector; the magnetic resistance detector comprises power supply (P1), magnetoresistive transducer unit (101), D/A conversion unit (102), central processing unit (U1), power supply (P1) is given magnetoresistive transducer unit (101), D/A conversion unit (102), central processing unit (U1) provide electric energy, magnetoresistive transducer unit (101) is made of magnetoresistive transducer, the analog electrical signal that magnetoresistive transducer generates converts digital signal to through D/A conversion unit (102) and passes to central processing unit (U1) again, central processing unit (U1) is exported result after to the supplied with digital signal calculation process from central processing unit (U1), the spike permanent magnet independent in outside the magnetic resistance detector and magnetoresistive transducer unit (101) in the magnetic field of spike permanent magnet.
2. a kind of animal body Search and Orientation device according to claim 1, be characterised in that: also comprise the sensor clear circuit (X1) that resets, sensor reset clear circuit (X1) and magnetoresistive transducer unit (101) UNICOM, power supply (P1) is to sensor clear circuit (X1) power supply that resets.
3. a kind of animal body Search and Orientation device according to claim 1, be characterised in that: also comprise PORT COM (CON1) and/or memory (U9), PORT COM (CON1) and/or memory (U9) are connected with central processing unit (U1).
4. a kind of animal body Search and Orientation device according to claim 1, be characterised in that: described magnetoresistive transducer unit (101) is one dimension magnetoresistive transducer or multidimensional magnetoresistive transducer; Described multidimensional magnetoresistive transducer comprises a plurality of magnetoresistive transducers, and described one dimension magnetoresistive transducer comprises a magnetoresistive transducer.
5. a kind of animal body Search and Orientation device according to claim 4, be characterised in that: described magnetoresistive transducer unit (101) is three-dimensional magnetoresistive transducer, the magnetoresistive transducer (U4) and the magnetoresistive transducer (U2) of the X-axis axial distribution that level encapsulates and the magnetoresistive transducer (U3) of a Y-axis axial distribution that comprise the Z axis axial distribution of a vertical encapsulation, described X-axis, Y-axis, Z axis are three axles of three dimensions rectangular coordinate system.
6. a kind of animal body Search and Orientation device according to claim 1, be characterised in that: described spike permanent magnet is sheet or the block permanent magnetic material of 0.01-5 cubic millimeters.
7. a kind of animal body Search and Orientation device according to claim 6, be characterised in that: described spike permanent magnet is sheet or the block permanent magnetic material of 1 cubic millimeter.
8. a kind of animal body Search and Orientation device according to claim 1 is characterised in that: also comprise display, display is connected with central processing unit (U1) or is connected with central processing unit (U1) by PORT COM (CON1).
9. a kind of animal body Search and Orientation device according to claim 1 is characterised in that: described device comprises that also earth magnetism eliminates circuit, and earth magnetism is eliminated circuit and magnetoresistive transducer unit (101) UNICOM.
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