CN108227017B - Dedicated fluxgate detector towards waters unexploded - Google Patents
Dedicated fluxgate detector towards waters unexploded Download PDFInfo
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- CN108227017B CN108227017B CN201711486889.9A CN201711486889A CN108227017B CN 108227017 B CN108227017 B CN 108227017B CN 201711486889 A CN201711486889 A CN 201711486889A CN 108227017 B CN108227017 B CN 108227017B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention discloses a kind of dedicated fluxgate detector towards waters unexploded.The dedicated fluxgate detector towards waters unexploded includes probe, excitation module, frequency-selecting module and signal acquisition module.The probe includes probe input terminal and probe output end.The excitation module includes digital waveform generator, power amplification circuit.The digital waveform generator is for generating square-wave signal.The frequency-selecting module is connect with the probe output end.The frequency-selecting module is used to detect the second harmonic signal in the induced voltage that the probe generates.The digital waveform generator can directly generate square-wave signal, can simplify the circuit structure of the excitation module, reduce electronic component.Therefore the dedicated fluxgate detector towards waters unexploded has the advantages that low-power consumption.
Description
Technical field
The present invention relates to field of detecting, more particularly to a kind of dedicated fluxgate detector towards waters unexploded.
Background technique
Currently, having had been found that unexploded in many waters in China.Due to the corrosion of waters unexploded, badly broken, it is easy to
Reveal chemical substance.Chemical substance will generate serious pollution to place waters once revealing.Therefore, time of waters unexploded
Knocking off, it is very urgent to make.In order to withdraw waters unexploded, it is necessary to carry out Underwater Target Detection.The Detection location of submarine target is
The premise of all underwater operations, therefore the Detection Techniques of waters unexploded study while there is very great reality to anticipate
Justice and urgency.
Status of the water area complexity is the important feature of waters unexploded detection.The waters unexploded of different sensing points abandons waters
Depth and underwater environment are different.Some sensing point waters are deeper, if the Dongting Lake depth of water is up to 30 meters, Jiamusi Song Hua River depth of water
Also at 4~11 meters.Some sensing point waters are then shallower, such as Guangzhou Fanyu Star Village Zhujiang River waters, some shells in ebb tide
Expose visible.Some sensing point waters flow velocity is big, and some flow velocitys are small, even hydrostatic (such as: reservoir).The shell of some sensing points
Expose muck surface, the shell of some sensing points then it is buried enter mud.For example, in Jiamusi Song Hua River discovery waters unexploded
Sensing point is formed in situ about 4 meters or so of dell due to adopting sand for a long time.Buried depth of the waters unexploded in silt, directly
Influence the applicable elements of Detection Techniques.
Distribution is wide, and quantity is mostly another important feature of waters unexploded.By taking Dongting Lake waters as an example, preliminary investigation at present
It was found that having artillery chemical shell, gas cylinder etc. there are three area distribution, these three regions are at a distance of several kilometers.In the so wide region of distribution
When being detected, improves detection efficient and guarantee that the validity of detection data is very necessary.
Corrosion is seriously the another important feature of waters unexploded.By nearly erosion in 70 years, the feature of waters unexploded
It changes.In the fifties in last century to the sixties, fisherman also once salvaged FCL not from Zhujiang River main channel with trawlnet
Quick-fried bullet.Shell case be it is wooden, due to gradually rotting, into the seventies after just do not find the unexploded of FCL again, but zero
It is scattered to dissipate salvaged come out.Nowadays pass by 40 years again, not only wooden shell case, the shell shell of original irony is also almost
Corrosion completely, main component is no longer iron.The detection practical experience of many years shows that existing Detection Techniques are tight in detection corrosion
There are problems that Detective omission when the waters unexploded of weight.
Also, since waters unexploded abandons, water environment is complicated, distribution is wide, quantity is big, and detection waters unexploded needs
It takes more time under water.Existing unexploded detector is consumed energy larger due to circuit structure complexity.Underwater unexploded is visited
Device is surveyed usually to power by battery, and the finite energy that battery power supply provides, this has resulted in unexploded detector makes under water
With the problem that the time is short, and reduce detection efficient of the unexploded detector in water.
Summary of the invention
Based on this, it is necessary to consume energy high problem for traditional unexploded detector, provide a kind of low-power consumption towards
Waters unexploded detector.
A kind of dedicated fluxgate detector towards waters unexploded, comprising:
Probe, including probe input terminal and probe output end；
Excitation module, comprising:
Digital waveform generator, for generating square-wave signal；
Power amplification circuit is connect with the output end of the digital waveform generator, and is connect with the probe input terminal；
Frequency-selecting module is connect with the probe output end, secondary in the induced voltage that the probe generates for detecting
Harmonic signal；
Signal acquisition module is connect with the frequency-selecting module.
In one of the embodiments, the frequency-selecting module include sequentially connected resonance circuit, low noise amplifier circuit,
Bandwidth-limited circuit.
The resonance circuit includes being connected to the probe output end and the low noise is put in one of the embodiments,
Capacitor C5 between big circuit.
The low noise amplifier circuit includes: in one of the embodiments,
Operational amplifier A2, the positive input of the operational amplifier A2 are connect with the output end of the resonance circuit；
Resistance R5, the positive input of the operational amplifier A2 are grounded by resistance R5；
Resistance RG is connect with the operational amplifier A2, for adjusting the amplification factor of the resonance circuit output signal.
Capacitor C6, the one end the capacitor C6 are connect with the negative voltage input terminal of the operational amplifier A2, the capacitor C6
The other end ground connection；
Capacitor C7, one end of the capacitor C7 are connect with the positive voltage input terminal of the operational amplifier A2, the capacitor
The other end of C7 is grounded.
The bandwidth-limited circuit includes: in one of the embodiments,
The reversed defeated end of operational amplifier A3, resistance R6 and capacitor C9, the operational amplifier A3 pass sequentially through the electricity
Hold C9, the resistance R6 is connect with the output end of the low noise amplifier circuit, the positive input of the operational amplifier A3
Ground connection；And
Resistance R7, capacitor C10 and resistance R8, the reverse input end of the operational amplifier A3 pass sequentially through the resistance
R8, the capacitor C10, the resistance R7 ground connection, the positive output end of the operational amplifier A3 be connected to the capacitor C10 and
Between the resistance R8.
The power amplification circuit includes: in one of the embodiments,
Operational amplifier A1, resistance R2 and capacitor C2, the reverse input end of the operational amplifier A1 pass sequentially through described
Resistance R2, the capacitor C2 ground connection；
Resistance R3, be connected to the operational amplifier A1 reverse input end and the operational amplifier A1 output end it
Between；
The positive input of resistance R1, the operational amplifier A1 are grounded by the resistance R1；And
Resistance R4 and capacitor C3, the output end of the operational amplifier A1 pass sequentially through the resistance R4, capacitor C3 ground connection.
The signal acquisition module includes that sequentially connected AD conversion unit and processing are single in one of the embodiments,
Member.
It in one of the embodiments, further include dilatation module, the dilatation module is connect with the signal acquisition module.
In one of the embodiments, further include probe posture monitoring modular, the probe posture monitoring modular with it is described
Signal acquisition unit connection, for monitoring the axis of the probe and the angle of horizontal plane.
Coupled capacitor is connected between the power amplification circuit and the probe input terminal in one of the embodiments,
C4。
Dedicated fluxgate detector provided by the invention towards waters unexploded includes probe, excitation module, frequency-selecting mould
Block, signal acquisition module.The probe includes probe input terminal and probe output end.The excitation module includes digital waveform hair
Raw device, power amplification circuit.The digital waveform generator can directly generate square-wave signal, can simplify the excitation module
Circuit structure, reduce electronic component.Therefore the dedicated fluxgate detector towards waters unexploded has low-power consumption
Advantage.
Detailed description of the invention
Fig. 1 is the dedicated fluxgate detector module figure provided in an embodiment of the present invention towards waters unexploded；
Fig. 2 is sonde configuration schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the circuit diagram of low noise amplifier circuit provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of bandwidth-limited circuit provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of power amplification circuit provided in an embodiment of the present invention.
Main element symbol description
Dedicated fluxgate detector 10 towards waters unexploded
Probe 100
Probe input terminal 110
Probe output end 120
Magnetic core 130
Excitation coil 131
Induction coil 132
Excitation module 200
Digital waveform generator 210
Power amplification circuit 220
Signal acquisition module 300
Frequency-selecting module 400
Resonance circuit 410
Low noise amplifier circuit 420
Bandwidth-limited circuit 430
Probe posture monitoring modular 500
Dilatation module 600
Specific embodiment
In order to which goal of the invention of the invention, technical solution and technical effect is more clearly understood, below in conjunction with attached drawing pair
Specific embodiments of the present invention are described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Fluxgate detector is the magnetic induction intensity and magnetic field strength using the material of magnetic core 130 in fluxgate magnetic core 100
Non-linear relation complete low-intensity magnetic field detection.Fluxgate magnetic core 100 uses differential configuration as shown in Figure 1, can inhibit induction
The fundametal compoment unrelated with tested magnetic field strength Hx in voltage e.
Under the excitation of alternating magnetic field, the magnetic field strength inside two magnetic cores 130 is equal to tested magnetic field strength and excitation field
The sum of intensity.When tested magnetic field strength Hx is zero, there is no the variation of magnetic flux in induction coil 132, induced voltage e is zero.
If tested magnetic field strength Hx is not zero, the time difference that two magnetic cores 130 enter saturation region will lead to, so that magnetic induction intensity
B is asymmetric, so that induced electromotive force related with tested magnetic field is induced in induction coil 132, due to the modulation of magnetic conductivity
The even-order harmonic ingredient of effect, the voltage is directly proportional to measurement magnetic field.Therefore, by detect second harmonic signal can be obtained by
Survey magnetic field relevant information.
Referring to Figure 1, the embodiment of the present invention provides a kind of dedicated fluxgate detector 10 towards waters unexploded.It is described
Dedicated fluxgate detector 10 towards waters unexploded is adopted including probe 100, excitation module 200, frequency-selecting module 400, signal
Collect module 300.The probe 100 includes probe input terminal 110 and probe output end 120.The excitation module 200 includes number
Waveform generator 210, power amplification circuit 220.The digital waveform generator 210 is for generating square-wave signal.The frequency-selecting
Module 400 is connect with the probe output end 120.The frequency-selecting module 400 is used to detect the induced electricity that the probe 100 generates
Second harmonic signal in pressure.The probe 100 is for sensing external magnetic field.The side that the digital waveform generator 210 generates
Wave signal can be used as the pumping signal input power amplification circuit 220 and amplify.By the power amplification circuit 220
The pumping signal of amplification inputs the probe input terminal 110.The signal acquisition module 300 can be to the frequency-selecting module 400
The signal of output is handled, to obtain the size in tested magnetic field.The dedicated fluxgate detector towards waters unexploded
Digital waveform generator 210 in 10 can directly generate square-wave signal, can simplify the circuit knot of the excitation module 200
Structure reduces electronic component.Therefore the dedicated fluxgate detector 10 towards waters unexploded has the advantages that low-power consumption.
The frequency of the square-wave signal can be 3KHz.When the frequency of square-wave signal is less than 10KHz, magnetic when square wave excitation
The high sensitivity of open gate probe 100 is in sine wave and triangular wave.And the frequency of pumping signal is excessively high, is equivalent to and reduces magnetic core
130 effective area can aggravate magnetic hysteresis and eddy current effect, increase the noise of 100 output signals of probe.Frequency is higher simultaneously, no
Conducive to the penetrability of signal.The power amplification circuit 220 is also connect with the probe input terminal 110.Pass through the digital wave
Program inside shape generator 210 can export the square-wave signal.
Fig. 2 is referred to, the probe 100 can be differential configuration.Differential configuration can inhibit in induced voltage with tested magnetic
The unrelated fundametal compoment of field intensity.The probe 100 may include two spaced magnetic cores 130.Each magnetic core 130
Including opposite both ends.Two magnetic cores 130 one end in the same direction can be connected by same root excitation coil 131.It is described to swash
Encouraging coil 131 can be used as the probe input terminal 110.The other end in the same direction of two magnetic cores 130 can also pass through one
Root induction coil 132 is intertwined and connected.The induction coil 132 is used as the probe output end 120.The magnetic core 130 can be
Cobalt base amorphous state magnetically soft alloy material.The cobalt base amorphous state magnetically soft alloy material has high magnetic permeability, low-coercivity and low
The advantages of magnetic field saturation intensity.The excitation module 200 can input the pumping signal by the excitation coil 131.Institute
Stating pumping signal can be alternating magnetic field signal.
Magnetic field strength inside two magnetic cores 130 is equal to tested the sum of magnetic field strength and alternating magnetic field signal.Work as quilt
When survey magnetic field strength intensity is not zero, the time difference that two magnetic cores 130 enter saturation region will lead to, so that magnetic induction intensity
It is asymmetric.Induced voltage related with tested magnetic field can be induced in the induction coil 132.Since the modulation of magnetic conductivity is made
With the second harmonic ingredient of the induced voltage is directly proportional to the intensity in tested magnetic field.Therefore, by detecting the second harmonic
Signal can be obtained tested magnetic field relevant information.The frequency-selecting module 400 passes through to described in the probe output end 120 output
Induced voltage handles to obtain the second harmonic.The signal acquisition module 300 is by carrying out at signal the second harmonic
Reason obtains the intensity in tested magnetic field.The specific substance for generating magnetic field can be identified by the intensity in the tested magnetic field, so as to
Enough judge unexploded.The dedicated fluxgate detector towards waters unexploded is distinguished by detecting the second harmonic of induced voltage
Not Bei Ce magnetic field intensity, have the advantages that with high accuracy.
The frequency-selecting module 400 is put including sequentially connected resonance circuit 410, low noise in one of the embodiments,
Big circuit 420, bandwidth-limited circuit 430.The resonance frequency of the resonance circuit 410 is the second harmonic frequency of the pumping signal
Rate.The second harmonic signal that the resonance circuit 410 exports is after the low noise amplifier circuit 420 amplification using band logical
The filtering of filter circuit 430 is output to the signal acquisition module 300 and is handled.
The resonance circuit 410 includes being connected to the probe output end 120 and described low in one of the embodiments,
Capacitor C5 between noise amplifier circuit 420.The capacitor C5 can constitute LC resonance circuit 410 with the probe 100.It is described
The frequency of resonance circuit 410 can be the second harmonic frequency of the pumping signal.
Fig. 3 is referred to, the low noise amplifier circuit 420 includes operational amplifier A2, electricity in one of the embodiments,
Hinder R5, resistance RG, capacitor C6, capacitor C7.The output of the positive input of the operational amplifier A2 and the resonance circuit 410
End connection.The positive input of the operational amplifier A2 is grounded by the resistance R5.The resistance RG is put with the operation
Big device A2 connection.For adjusting the amplification factor of 410 output signal of resonance circuit.The resistance value of the resistance RG can be adjusted
Section.According to the amplification factor for adjustable 410 output signal of resonance circuit of resistance value for adjusting the resistance RG.The capacitor
The one end C6 is connect with the negative voltage input terminal of the operational amplifier A2, the other end ground connection of the capacitor C6.The capacitor C7
One end connect with the positive voltage input terminal of the operational amplifier A2, the other end of capacitor C7 ground connection.One wherein
In embodiment, the operational amplifier A2 can be AD620 chip.620 chip has the advantages that low-power consumption.It is described
The pin 4 of AD620 chip can be connect with negative voltage input terminal, the pin 4 of the capacitor C6 and the operational amplifier A2
Connection can have the effect of uncoupling.The both ends of the resistance RG can draw with the 1st pin and the 8th of the AD620 chip
Foot connection.7th pin of the AD620 chip can be connect with positive voltage output end, and the capacitor C7 is connected to the AD620
7th pin of chip can have the effect of uncoupling.
Fig. 4 is referred to, the bandwidth-limited circuit 430 includes operational amplifier A3, resistance in one of the embodiments,
R6, capacitor C9, resistance R7, capacitor C10, resistance R8.The defeated end that reversely enters of the operational amplifier A3 passes sequentially through the capacitor
C9, resistance R6 are connect with the output end of the low noise amplifier circuit 420, and the positive input of the operational amplifier A3 connects
Ground.The reverse input end of the operational amplifier A3 passes sequentially through the resistance R8, the capacitor C10, resistance R7 ground connection,
The positive output end of the operational amplifier A3 is connected between the capacitor C10 and the resistance R8.The operational amplifier
A3 can be chip OPA2188.It can simplify circuit structure using chip OPA2188, to have the function of reducing power consumption.
Fig. 5 is referred to, the power amplification circuit 220 includes operational amplifier A1, resistance in one of the embodiments,
R2, capacitor C2, resistance R3, resistance R1, resistance R4, capacitor C3.The reverse input end of the operational amplifier A1 passes sequentially through institute
State resistance R2, the capacitor C2 ground connection.The resistance R3 be connected to the operational amplifier A1 reverse input end and the fortune
Between the output end for calculating amplifier A1.The positive input of the operational amplifier A1 is grounded by the resistance R1.The fortune
The output end for calculating amplifier A1 passes sequentially through the resistance R4, capacitor C3 ground connection.The resistance R4, capacitor C3 have the work of noise reduction
With.The power amplification circuit 220 can be directly connected to the digital waveform generator 210, simplified circuit structure, saved
The electronic original parts such as unnecessary voltage follower can reduce the dedicated fluxgate detector 10 towards waters unexploded
Power consumption.
The signal acquisition module 300 includes sequentially connected AD conversion unit and place in one of the embodiments,
Manage unit.The output end of the operational amplifier A1 can be connect with the AD conversion unit.The AD conversion unit is used
Anaiog signal is converted to digital signal.Digital signal can input the processing unit calculation processing, to obtain tested magnetic
The intensity of field.Intensity by being tested magnetic field may determine that whether measured matter is unexploded.
It in one of the embodiments, further include dilatation module 600.The dilatation module 600 and the signal acquisition mould
Block 300 connects.The dilatation module 600 can store more detection informations, described towards the detection of waters unexploded to increase
Device uses the time, improves working efficiency.The dilatation module 600 can be external extension in one of the embodiments,
Mode is arranged.The extension that tandem eeprom chip AT24C1024 completes memory capacity can be used.Eeprom chip chip has
Compact-sized, the advantages that memory capacity is big.
The dedicated fluxgate detector 10 towards waters unexploded further includes probe appearance in one of the embodiments,
State monitoring modular 500, the probe posture monitoring modular 500 are connect with the signal acquisition module 300, are used for monitoring probe
100 axis and the angle of horizontal plane.Dedicated fluxgate detector 10 detection towards waters unexploded is tested magnetic
Field is in the axial components of the probe 100.The probe 100 should be perpendicular to horizontal plane when working under water.Pass through the probe
Attitude monitoring module 500 can reject because pop one's head in 100 underwater attitude misalignment due to the invalid data that generates to detection result
It influences, to increase detection accuracy.In one of the embodiments, when the spy of the probe posture monitoring modular 500 monitoring
When the angle exception of first 100 axis and the horizontal plane, it can record and be reported by the signal acquisition unit 300
It is alert.The probe posture monitoring modular 500 is digitlization sensor in one of the embodiments,.The digitlization sensor
Inside contains the micro- capacitance sensor of a silicon-sensitive, eeprom memory, signal amplifier, A/D converter and SPI and serially leads to
Believe interface, there are high-res, low noise and other advantages.
Coupling is connected between the power amplification circuit 220 and the probe input terminal 110 in one of the embodiments,
Close capacitor C4.The coupled capacitor C4 has the function of filtering.
It is connected between the digital waveform generator 210 and the power amplification circuit 220 in one of the embodiments,
There is coupled capacitor C1.The coupled capacitor C4 has the function of filtering.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are
For illustrative purposes.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of dedicated fluxgate detector towards waters unexploded characterized by comprising
It pops one's head in (100), including probe input terminal (110) and probe output end (120)；
Excitation module (200), comprising:
Digital waveform generator (210), for generating square-wave signal；
Power amplification circuit (220) is connect with the output end of the digital waveform generator (210), and is inputted with the probe
Hold (110) connection；
Frequency-selecting module (400) is connect with the probe output end (120), the induced electricity generated for detecting the probe (100)
Second harmonic signal in pressure；
Signal acquisition module (300) is connect with the frequency-selecting module (400)；
The frequency-selecting module (400) includes sequentially connected resonance circuit (410), low noise amplifier circuit (420), bandpass filtering
Circuit (430)；
The resonance circuit (410) includes:
The capacitor C5 being connected between probe output end (120) and the low noise amplifier circuit (420)；
The low noise amplifier circuit (420) includes:
The positive input of operational amplifier A2, the operational amplifier A2 are connect with the output end of the resonance circuit (410)；
Resistance R5, the positive input of the operational amplifier A2 are grounded by resistance R5；
Resistance RG is connect with the operational amplifier A2, for adjusting the times magnification of the resonance circuit (410) output signal
Number,
Capacitor C6, the one end the capacitor C6 are connect with the negative voltage input terminal of the operational amplifier A2, and the capacitor C6's is another
One end ground connection；
Capacitor C7, one end of the capacitor C7 are connect with the positive voltage input terminal of the operational amplifier A2, the capacitor C7's
Other end ground connection；
The bandwidth-limited circuit (430) includes:
Operational amplifier A3, resistance R6 and capacitor C9, the reverse input end of the operational amplifier A3 pass sequentially through the capacitor
C9, the resistance R6 are connect with the output end of the low noise amplifier circuit (420), the positive input of the operational amplifier A3
End ground connection；And
Resistance R7, capacitor C10 and resistance R8, the reverse input end of the operational amplifier A3 pass sequentially through the resistance R8, institute
Capacitor C10 and resistance R7 ground connection is stated, the positive output end of the operational amplifier A3 is connected to the capacitor C10 and described
Between resistance R8.
2. the dedicated fluxgate detector towards waters unexploded as described in claim 1, which is characterized in that the power is put
Big circuit (220) includes:
Operational amplifier A1, resistance R2 and capacitor C2, the reverse input end of the operational amplifier A1 pass sequentially through the resistance
R2, the capacitor C2 ground connection；
Resistance R3 is connected between the reverse input end of the operational amplifier A1 and the output end of the operational amplifier A1；
The positive input of resistance R1, the operational amplifier A1 are grounded by the resistance R1；
Resistance R4 and capacitor C3, the output end of the operational amplifier A1 pass sequentially through the resistance R4, capacitor C3 ground connection.
3. the dedicated fluxgate detector towards waters unexploded as described in claim 1, which is characterized in that the signal is adopted
Collecting module (300) includes sequentially connected AD conversion unit and processing unit.
4. the dedicated fluxgate detector towards waters unexploded as claimed in claim 3, which is characterized in that further include dilatation
Module (600), the dilatation module (600) connect with the signal acquisition module (300).
5. the dedicated fluxgate detector towards waters unexploded as described in claim 1, which is characterized in that further include probe
Attitude monitoring module (500), the probe posture monitoring modular (500) connect with the signal acquisition unit (300), for supervising
Survey the axis of the probe (100) and the angle of horizontal plane.
6. the dedicated fluxgate detector towards waters unexploded as described in claim 1, which is characterized in that the power is put
Coupled capacitor C4 is connected between big circuit (220) and the probe input terminal (110).
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| CN201711486889.9A CN108227017B (en) | 2017-12-29 | 2017-12-29 | Dedicated fluxgate detector towards waters unexploded |
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| CN112798991B (en) * | 2021-03-29 | 2021-07-23 | 中国科学院地质与地球物理研究所 | High-speed processing device for induction signals of fluxgate magnetometer |
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| US6150810A (en) * | 1997-03-24 | 2000-11-21 | Bechtel Bwxt Idaho, Llc | Method for detecting the presence of a ferromagnetic object using maximum and minimum magnetic field data |
| KR100430385B1 (en) * | 2003-06-04 | 2004-05-10 | (주) 이우티이씨 | A magnetic locator for locating buried objects by using magnetic markers |
| CN103645515A (en) * | 2013-09-13 | 2014-03-19 | 中国人民解放军防化学院 | Method for detecting Japan abandoned chemical weapons in water areas |
| CN104535943A (en) * | 2014-12-30 | 2015-04-22 | 吉林大学 | Device and method for measuring magnetic induction intensity B through time domain electromagnetic method |
| CN104698407B (en) * | 2015-03-06 | 2018-08-28 | 清华大学 | A kind of number flux-gate magnetometer and magnetic survey system |
| CN105785461B (en) * | 2016-05-10 | 2017-10-31 | 杭州电子科技大学 | A kind of measuring circuit of seabed three-component magnetometer |
| CN106443805B (en) * | 2016-11-22 | 2019-02-19 | 中国地震局地球物理研究所 | A kind of signal deteching circuit and the flux-gate magnetometer of flux-gate magnetometer |
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