CN208060735U - Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor - Google Patents
Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor Download PDFInfo
- Publication number
- CN208060735U CN208060735U CN201820579570.4U CN201820579570U CN208060735U CN 208060735 U CN208060735 U CN 208060735U CN 201820579570 U CN201820579570 U CN 201820579570U CN 208060735 U CN208060735 U CN 208060735U
- Authority
- CN
- China
- Prior art keywords
- pin
- capacitance
- resistance
- amplifier chip
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses the Electromagnetism of Earthquake disturbance observation systems based on induction type magnetic sensor.Wide band induction type magnetic sensor is chiefly used in the fields such as physical prospecting, it is difficult to directly apply to the observation of Electromagnetism of Earthquake disturbance.The utility model includes data acquisition module and induction type magnetic sensor；The core of data acquisition module uses NI data acquisition platforms；Induction type magnetic sensor includes magnetic coil module and circuit module；Electromagnetism of Earthquake disturbing signal is converted to voltage signal by magnetic coil module, then carry out preposition amplification by circuit module, be filtered and rear class amplification after through NI data acquisition platforms be transmitted to computer.The band characteristics of the utility model base area seismoelectric magnetic disturbance signal, design the magnetic coil module and circuit module of induction type magnetic sensor, Electromagnetism of Earthquake disturbing signal is converted to voltage signal, data are acquired and handled by NI data acquisition platforms, obtain low noise, the output of highly sensitive signal, the compatibly observation of seismoelectric magnetic disturbance.
Description
Technical field
The utility model belongs to Electromagnetism of Earthquake disturbance observation field, and in particular to a kind of ground based on induction type magnetic sensor
Seismoelectric magnetic disturbance observation system.
Background technology
China's Electromagnetism of Earthquake disturbance observation job initiation is after Tangshan Earthquake in 1976, the research by decades and hair
Exhibition becomes a kind of seismic precursor Impending anomaly monitoring means at present, and observation frequency range is mainly very low frequency (VLF) and ultralow frequency
(ULF), frequency range is 0.1Hz~10Hz, studies earth's surface magnetic field intensity in the frequency range of observation place and changes with time.
Induction type magnetic sensor is the sensor that changes of magnetic field is measured using Faraday's electromagnetic induction law, is electromagnetic distu
One of core component of observation is widely used in the fields such as land, exploration of ocean resources, space magnetic field detection.It is external to sense at present
The research relative maturity of formula Magnetic Sensor is answered, and has finished product to promote on the market, has the characteristics that broadband, low noise.For example,
The MFS-06e of German Metronix companies, the MTC-80 etc. of Pheonix companies of Canada.Magnetic Sensor at home in recent years
Faster development is achieved, such as the CAS-10 Magnetic Sensors that the Chinese Academy of Sciences develops, the units such as Jilin University, Central South University are also engaged in
Relevant research.However wide band induction type magnetic sensor is chiefly used in the fields such as physical prospecting, it is difficult to directly apply to Electromagnetism of Earthquake
The observation of disturbance.
Invention content
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of earthquake based on induction type magnetic sensor
Electromagnetic distu observation system, wherein induction type magnetic sensor have the characteristics that highly sensitive, low noise, bandwidth of operation is 0.01~
30Hz, noise level are 0.15pT/ √ Hz in 1Hz, and compatibly seismoelectric magnetic disturbance is observed.
The utility model includes data acquisition module and induction type magnetic sensor.The core of the data acquisition module is adopted
With NI data acquisition platforms, NI data acquisition platforms select list slot NI CompactDAQ USB cabinets cDAQ-9171 and connection
NI9239 modules on the cabinet.The induction type magnetic sensor includes magnetic coil module and circuit module.Magnetic coil mould
Electromagnetism of Earthquake disturbing signal is converted to voltage signal by block, then pass through circuit module carry out it is preposition amplification, be filtered and
Single slot NI CompactDAQ USB cabinet cDAQ-9171 are transmitted to through NI9239 modules after rear class amplification, then are transmitted to computer.
The magnetic coil module includes magnetic core, skeleton, induction coil and shell；Magnetic core both ends are fixed by support base
On the shell, skeleton is coaxially nested with outside magnetic core；The magnetic core is stacked together successively by multi-disc thin slice；The skeleton includes
The centre bore of integrally formed multiple reels and connecting cylinder, reel and connecting cylinder is square hole, and adjacent reel passes through company
Connect cylinder connects；Reel both ends are equipped with the shaft shoulder；Induction coil is wound on each reel, is drawn after all induction coil series connection
Go out output end.It is located in shell around each induction coil and fills non-magnetic material.
The circuit module includes pre-amplification circuit unit, filter circuit unit and rear class amplifier circuit unit；Institute
The pre-amplification circuit unit stated includes the first amplifier chip U1, the model OP07CN of the first amplifier chip U1.Induction coil
Output end signal line combination hub P1 pin 1 and pin 2, and the pin that the output end shielded layer of induction coil passes through socket P1
3 ground connection；The pin 1 of socket P1 is connected to the pin 2 of the first amplifier chip U1；The pin 2 of first amplifier chip U1 connects the first electricity
The pin 6 of the first amplifier chip of another termination U1 of one end of resistance R1 and the 5th capacitance C5, first resistor R1 and the 5th capacitance C5；
The pin 2 of socket P1 connects the pin 3 of the first amplifier chip U1 and one end of second resistance R2, another termination of second resistance R2
Power foot J3；The pin 3 of socket P1 is grounded；The pin 4 of first amplifier chip U1 passes through 3rd resistor R3 connections power supply foot J2；The
The pin 4 of one amplifier chip U1 connects one end of the second capacitance C2 and the 4th capacitance C4, and the second capacitance C2 and the 4th capacitance C4's is another
One end connection power supply foot J3.The pin 7 of first amplifier chip U1 passes through 3rd resistor R4 connections power supply foot J1；First amplifier chip
The pin 7 of U1 connects one end of the first capacitance C1 and third capacitance C3, and the other end connection of the first capacitance C1 and third capacitance C3 supply
Electric foot J3.The pin 6 of first amplifier chip U1 is the output end vo 1 of pre-amplification circuit unit.The pipe of first amplifier chip U1
Foot 1,5 and 8 is hanging.
The filter circuit unit includes first order filter circuit, second level filter circuit and third level filter circuit；
The first order filter circuit includes the second amplifier chip U2, the model ADOP27GN of the second amplifier chip U2.Preceding storing
The output end vo 1 of big circuit unit is connected serially to the pin 3 of the second amplifier chip U2 by the 5th resistance R5 and the 6th resistance R6；The
The pin 3 of two amplifier chip U2 is connected to power supply foot J3 by the 6th capacitance C6；The connection of 5th resistance R5 and the 6th resistance R6
Terminate second amplifier chip of another termination of one end of the 7th capacitance C7 and the 8th capacitance C8, the 7th capacitance C7 and the 8th capacitance C8
The pin 6 of U2；The pin 2 of second amplifier chip U2 connects the pin 6 of the second amplifier chip U2；The pin of second amplifier chip U2
4 are connected to power supply foot J2 by the 7th resistance R7；The pin 4 of second amplifier chip U2 is connected to power supply foot by the 9th capacitance C9
J3；The pin 7 of second amplifier chip U2 is connected to power supply foot J1 by the 8th resistance R8；The pin 7 of second amplifier chip U2 is logical
It crosses the tenth capacitance C10 and is connected to power supply foot J3；The pin 1,5 and 8 of second amplifier chip U2 is hanging.
The second level filter circuit includes third amplifier chip U3, the model of third amplifier chip U3
ADOP27GN.The pin 6 of second amplifier chip U2 of first order filter circuit is used as input terminal, and passes through the 9th resistance R9 and the
Ten resistance R10 are connected serially to the pin 3 of third amplifier chip U3；The pin 3 of third amplifier chip U3 is connected by the 14th capacitance C14
It is connected to power supply foot J3；Connection termination the 11st capacitance C11's and the 12nd capacitance C12 of 9th resistance R9 and the tenth resistance R10
The pin 6 of the other end connection third amplifier chip U3 of one end, the 11st capacitance C11 and the 12nd capacitance C12；Third amplifier core
The pin 2 of piece U3 connects the pin 6 of third amplifier chip U3；The pin 4 of third amplifier chip U3 is connected by eleventh resistor R11
Meet power supply foot J2；The pin 4 of third amplifier chip U3 passes through the 13rd capacitance C13 connections power supply foot J3；Third amplifier chip U3
Pin 7 pass through twelfth resistor R12 connections and power foot J1；The pin 7 of third amplifier chip U3 is connected by the 15th capacitance C15
It is connected to power supply foot J3；The pin 1,5 and 8 of third amplifier chip U3 is hanging.
The third level filter circuit includes four high guaily unit chip U4, the model of four high guaily unit chip U4
ADOP27GN.The pin 6 of the third amplifier chip U3 of second level filter circuit is used as input terminal, and passes through thirteenth resistor R13
The pin 3 of four high guaily unit chip U4 is connected serially to the 14th resistance R14；The pin 3 of four high guaily unit chip U4 passes through the 20th electricity
Hold C20 connections power supply foot J3；The connection of thirteenth resistor R13 and the 14th resistance R14 terminate the 16th capacitance C16, the 17th
One end of capacitance C17 and the 18th capacitance C18, the 16th capacitance C16, the 17th capacitance C17 and the 18th capacitance C18's is another
Terminate the pin 6 of four high guaily unit chip U4；The pin 2 of four high guaily unit chip U4 connects the pin 6 of four high guaily unit chip U4；4th
The pin 4 of amplifier chip U4 passes through the 15th resistance R15 connections power supply foot J2；The pin 4 of four high guaily unit chip U4 passes through the tenth
Nine capacitance C19 connections power supply foot J3；The pin 7 of four high guaily unit chip U4 passes through the 16th resistance R16 connections power supply foot J1；4th
The pin 7 of amplifier chip U4 passes through the 21st capacitance C21 connections power supply foot J3；The pin 1,5 and 8 of four high guaily unit chip U4 is equal
Vacantly.
The output end vo 1 of pre-amplification circuit unit connects the pin 2 of three core jumper wire device P2, the pin 1 of three core jumper wire device P2
Connect the pin 1 of three core jumper wire device P3 and as the output end vo of filter circuit unit 2, three core jumper wire device P2 and three core jumper wire device P3
Pin 3 it is hanging；The pin 2 of three core jumper wire device P3 connects the pin 6 of four high guaily unit chip U4.
The rear class amplifier circuit unit includes the 5th amplifier chip U5, the model of the 5th amplifier chip U5
ADOP27GN.The 2 combination hub P4 of output end vo of filter circuit unit, the pin 2 of socket P5 and socket P6, the pin 1 of socket P4
One end of the 17th resistance R17 is connect, the pin 1 of socket P5 connects one end of the 18th resistance R18, and the pin 1 of socket P6 connects the tenth
One end of nine resistance R19；The 5th amplifier of another termination of 17th resistance R17, the 18th resistance R18 and the 19th resistance R19
The pin 2 of chip U5.The pin 2 of 5th amplifier chip U5 connects one end of the 22nd resistance R22 and the 26th capacitance C26,
The pin 6 of the 5th amplifier chip U5 of another termination of 22nd resistance R22 and the 26th capacitance C26；5th amplifier chip
The connection power supply foot of pin 3 J3 of U5；The pin 7 of 5th amplifier chip U5 passes through the 20th resistance R20 connections power supply foot J1；5th
The pin 7 of amplifier chip U5 passes through the 22nd capacitance C22 and the 23rd shunt circuits capacitance C23 connection power supply foot J3.The
The pin 4 of five amplifier chip U5 passes through the 21st resistance R21 connections power supply foot J2；The pin 4 of 5th amplifier chip U5 passes through
24th capacitance C24 and the 25th shunt circuits capacitance C25 connection power supply foot J3.The pin 6 of 5th amplifier chip U5 is logical
Cross the pin 1 that the 27th capacitance C27 and the 23rd resistance R23 is connected serially to socket P7；The pin 1 of socket P7 is put as rear class
The output end of big circuit unit, and output signal to NI9239 modules；The pin 2 of socket P7 is grounded；27th capacitance C27 is adopted
The pin 6 of the 5th amplifier chip U5 is connect with the anode of electrolytic capacitor, and the 27th capacitance C27；The pipe of 5th amplifier chip U5
Foot 1,5 and 8 is hanging.
The power supply of the circuit module is provided by power supply foot J1, J2, J3 of power supply circuit, power supply foot J1, J2, J3's
Supply voltage is respectively 18V, 0V, 9V.
The magnetic core is integrally rectangle, and sheeting is the permalloy 1J85 of high magnetic permeability.
The skeleton uses phenolic resin material；Induction coil is formed with the copper enameled wire coiling of a diameter of 0.29mm,
The number of turns is 28000 circles, length 200mm, thickness 19.5mm；Shell uses PVC material, and non-magnetic material is foamed plastics.
The first resistor R1 and second resistance R2 is 3.3M Ω；3rd resistor R3 and the 4th resistance R4 is 3.3
Ω；First capacitance C1 and the second capacitance C2 is 100nF；Third capacitance C3 and the 4th capacitance C4 is 1 μ F.
The 5th resistance R5 be 1.87k Ω, the 6th resistance R6 be 17.8k Ω, the 7th resistance R7, the 8th resistance R8,
Eleventh resistor R11, twelfth resistor R12, the 15th resistance R15, the 16th resistance R16 are 3.3 Ω, and the 9th resistance R9 is
2.61k Ω, the tenth resistance R10 are 18.7k Ω, and thirteenth resistor R13 is 2.15k Ω, and the 14th resistance R14 is 17.8k Ω；The
Six capacitances are 1 μ F, and the 7th capacitance C7, the 8th capacitance C8, the 11st capacitance C11, the 12nd capacitance C12 are 6.8 μ F, the 9th electricity
It is equal to hold C9, the tenth capacitance C10, the 13rd capacitance C13, the 15th capacitance C15, the 19th capacitance C19, the 21st capacitance C21
It is 150nF for 100nF, the 14th capacitance C14, the 16th capacitance C16 is 2.2 μ F, the 17th capacitance C17, the 18th capacitance C18
It is 10 μ F, the 20th capacitance is 33nF.
The 17th resistance R17 is 100 Ω, and the 18th resistance R18 is 1k Ω, the 19th resistance R19, the 22nd
Resistance R22 is 10k Ω, and the 20th resistance R20, the 21st resistance R21 are 3.3 Ω, and the 23rd resistance R23 is 4.7k
Ω；22nd capacitance C22, the 24th capacitance C24, the 26th capacitance C26 are 100nF, the 23rd capacitance C23,
25th capacitance C25 is 1 μ F, and the 27th capacitance C27 is 470 μ F.
The power supply circuit includes the 6th amplifier chip U6, the model TL081CN of the 6th amplifier chip U6；Power supply is inserted
The pin 1 of seat connects the anode of rectifier diode D1, and the cathode of rectifier diode D1 connects the pin 1 of three terminal regulator V1；Three ends are steady
The model MC7818CT of depressor V1；The pin 2 of three terminal regulator V1 connects the pin 2 of power outlet；28th capacitance C28's
Both ends connect the pin 1 and pin 2 of three terminal regulator V1 respectively.The pin 3 of three terminal regulator V1 connects the pipe of the 6th amplifier chip U6
Foot 7 and as power supply foot J1, the 6th amplifier chip U6 pin 2 connect the 6th amplifier chip U6 pin 6 and as power supply foot
J3；The pin 7 that the pin 3 of 6th amplifier chip U6 passes through the 6th amplifier chip U6 of the 24th resistance R24 connections；6th amplifier
The pin 3 of chip U6 is grounded by the 29th capacitance C29 and the 25th shunt circuits resistance R25；29th capacitance C29
The pin 3 of the 6th amplifier chip U6 is connect using the anode of electrolytic capacitor, and the 29th capacitance C29；6th amplifier chip U6's
Pin 4 is grounded and as power supply foot J2；The pin 1,5 and 8 of 6th amplifier chip U6 is hanging.
24th resistance R24, the 25th resistance R25 is 3.3M Ω；28th capacitance C28 is
330nF, the 29th capacitance C29 are 100 μ F, the model 1N4004 of rectifier diode D1.
The utility model has the beneficial effects that：
1, the band characteristics of the utility model base area seismoelectric magnetic disturbance signal design the magnetic coil of induction type magnetic sensor
Module and circuit module, voltage signal is converted to by Electromagnetism of Earthquake disturbing signal, is acquired and is handled by NI data acquisition platforms
Data obtain low noise, the output of highly sensitive signal, the compatibly observation in seismoelectric magnetic disturbance field.NI data acquisition platforms
With high reliability and stability.
2, compensation amplification, low frequency are realized in magnetic induction sensor pre-amplification circuit part using the own characteristic of magnetic coil
When amplification factor it is larger, with the increase of frequency, amplification factor is gradually reduced；Rear class amplification circuits need to select according to observation
Select corresponding rear class amplification factor；Circuit module design is simple, easy to maintain and maintenance；
3, by the switching of the vacant or short circuit of two three core jumper wire devices can select to preposition amplified voltage signal into
Row is filtered, or is directly entered rear class amplifier circuit unit, convenient for carrying out test-based examination to filter circuit unit.
4, magnetic induction sensor has the advantages of simple structure and easy realization sealing, and coil can long-term buried observation.
Description of the drawings
Fig. 1 is the structural schematic diagram of magnetic coil module in the utility model；
Fig. 2 is the pre-amplification circuit element circuit figure of circuit module in the utility model；
Fig. 3 is the filter circuit element circuit figure of circuit module in the utility model；
Fig. 4 is the rear class amplifier circuit unit circuit diagram of circuit module in the utility model；
Fig. 5 is the power supply circuit of circuit module in the utility model.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Electromagnetism of Earthquake disturbance observation system of the utility model based on induction type magnetic sensor, including data acquisition module and
Induction type magnetic sensor.The core of data acquisition module uses NI data acquisition platforms, NI data acquisition platforms to select single slot NI
CompactDAQ USB cabinets cDAQ-9171 and the NI9239 modules being connected on the cabinet, it is versatile, have higher
Stability and reliability.Induction type magnetic sensor includes magnetic coil module and circuit module.Magnetic coil module disturbs Electromagnetism of Earthquake
Dynamic signal is converted to voltage signal, then by circuit module carry out it is preposition amplification, be filtered and rear class amplification after pass through
NI9239 modules are transmitted to single slot NI CompactDAQ USB cabinet cDAQ-9171, then are transmitted to computer.
As shown in Figure 1, magnetic coil module includes magnetic core 1, skeleton 2, induction coil 3 and shell 4；1 both ends of magnetic core pass through
Support base is fixed on shell 4, and skeleton 2 is coaxially nested with outside magnetic core 1；Magnetic core 1 is stacked together successively by multi-disc thin slice, is in integrally
Rectangle, sheeting are the permalloy 1J85 of high magnetic permeability；Skeleton includes integrally formed multiple reels and connecting cylinder,
The centre bore of reel and connecting cylinder is square hole, and adjacent reel is connected by connecting cylinder；Reel both ends are equipped with the shaft shoulder；
The design of induction coil segmentation coiling reduces the distribution capacity of magnetic coil module；Induction coil 3 is wound on each reel,
All induction coils 3 draw output end after connecting.Skeleton is using the phenolic resin material that stability is good, the coefficient of expansion is small；Induction
Coil is formed with the copper enameled wire coiling of a diameter of 0.29mm, and the number of turns is 28000 circles, length 200mm, thickness 19.5mm.
For shell 4 using the PVC material with higher mechanical strength, shell 4 is interior to fill non-magnetic material around each induction coil,
Such as foamed plastics, protected in favor of the shock insulation of induction coil.
As shown in Figure 2, Figure 3, Figure 4, circuit module includes pre-amplification circuit unit, filter circuit unit and rear class amplification
Circuit unit；
As shown in Fig. 2, pre-amplification circuit unit includes the first amplifier chip U1, the model of the first amplifier chip U1
OP07CN.The pin 1 and pin 2 of the output end signal line combination hub P1 of induction coil 3, and the output end shield of induction coil 3
Layer is grounded by the pin 3 of socket P1；The pin 1 of socket P1 is connected to the pin 2 of the first amplifier chip U1；First amplifier chip
The pin 2 of U1 connects one end of first resistor R1 and the 5th capacitance C5, another termination first of first resistor R1 and the 5th capacitance C5
The pin 6 of amplifier chip U1；The pin 2 of socket P1 connects the pin 3 of the first amplifier chip U1 and one end of second resistance R2, the
Another termination power supply foot J3 of two resistance R2；The pin 3 of socket P1 is grounded；The pin 4 of first amplifier chip U1 passes through third electricity
Hinder R3 connections power supply foot J2；The pin 4 of first amplifier chip U1 connects one end of the second capacitance C2 and the 4th capacitance C4, the second capacitance
The other end of C2 and the 4th capacitance C4 connection power supply foot J3.The pin 7 of first amplifier chip U1 is supplied by 3rd resistor R4 connections
Electric foot J1；The pin 7 of first amplifier chip U1 connects one end of the first capacitance C1 and third capacitance C3, the first capacitance C1 and third electricity
Hold the other end connection power supply foot J3 of C3.The pin 6 of first amplifier chip U1 is the output end vo 1 of pre-amplification circuit unit.
The pin 1,5 and 8 of first amplifier chip U1 is hanging.
First resistor R1 and second resistance R2 is 3.3M Ω；3rd resistor R3 and the 4th resistance R4 is 3.3 Ω；First
Capacitance C1 and the second capacitance C2 is 100nF；Third capacitance C3 and the 4th capacitance C4 is 1 μ F.
As shown in figure 3, filter circuit unit includes first order filter circuit, second level filter circuit and third level filtered electrical
Road；First order filter circuit includes the second amplifier chip U2, the model ADOP27GN of the second amplifier chip U2.Preposition amplification electricity
The output end vo 1 of road unit is connected serially to the pin 3 of the second amplifier chip U2 by the 5th resistance R5 and the 6th resistance R6；Second fortune
The pin 3 for putting chip U2 is connected to power supply foot J3 by the 6th capacitance C6；The connection of 5th resistance R5 and the 6th resistance R6 terminates
The second amplifier chip of another termination U2's of one end of 7th capacitance C7 and the 8th capacitance C8, the 7th capacitance C7 and the 8th capacitance C8
Pin 6；The pin 2 of second amplifier chip U2 connects the pin 6 of the second amplifier chip U2；The pin 4 of second amplifier chip U2 is logical
It crosses the 7th resistance R7 and is connected to power supply foot J2；The pin 4 of second amplifier chip U2 is connected to power supply foot J3 by the 9th capacitance C9；
The pin 7 of second amplifier chip U2 is connected to power supply foot J1 by the 8th resistance R8；The pin 7 of second amplifier chip U2 passes through
Ten capacitance C10 are connected to power supply foot J3；The pin 1,5 and 8 of second amplifier chip U2 is hanging.
Second level filter circuit includes third amplifier chip U3, the model ADOP27GN of third amplifier chip U3.First
The pin 6 of second amplifier chip U2 of grade filter circuit is used as input terminal, and passes through the 9th resistance R9 and the tenth resistance R10 series connection
To the pin 3 of third amplifier chip U3；The pin 3 of third amplifier chip U3 is connected to power supply foot J3 by the 14th capacitance C14；
One end of connection termination the 11st capacitance C11 and the 12nd capacitance C12 of 9th resistance R9 and the tenth resistance R10, the 11st electricity
Hold the pin 6 of the other end connection third amplifier chip U3 of C11 and the 12nd capacitance C12；The pin 2 of third amplifier chip U3 connects
Connect the pin 6 of third amplifier chip U3；The pin 4 of third amplifier chip U3 passes through eleventh resistor R11 connections power supply foot J2；The
The pin 4 of three amplifier chip U3 passes through the 13rd capacitance C13 connections power supply foot J3；The pin 7 of third amplifier chip U3 passes through
12 resistance R12 connections power supply foot J1；The pin 7 of third amplifier chip U3 is connected to power supply foot J3 by the 15th capacitance C15；
The pin 1,5 and 8 of third amplifier chip U3 is hanging.
Third level filter circuit includes four high guaily unit chip U4, the model ADOP27GN of four high guaily unit chip U4.Second
The pin 6 of the third amplifier chip U3 of grade filter circuit is used as input terminal, and passes through thirteenth resistor R13 and the 14th resistance
R14 is connected serially to the pin 3 of four high guaily unit chip U4；The pin 3 of four high guaily unit chip U4 is powered by the 20th capacitance C20 connections
Foot J3；The connection of thirteenth resistor R13 and the 14th resistance R14 terminate the 16th capacitance C16, the 17th capacitance C17 and the tenth
One end of eight capacitance C18, the 16th capacitance C16, the 17th capacitance C17 and the 18th capacitance C18 another termination four high guaily unit
The pin 6 of chip U4；The pin 2 of four high guaily unit chip U4 connects the pin 6 of four high guaily unit chip U4；Four high guaily unit chip U4's
Pin 4 passes through the 15th resistance R15 connections power supply foot J2；The pin 4 of four high guaily unit chip U4 passes through the 19th capacitance C19 connections
Power foot J3；The pin 7 of four high guaily unit chip U4 passes through the 16th resistance R16 connections power supply foot J1；Four high guaily unit chip U4's
Pin 7 passes through the 21st capacitance C21 connections power supply foot J3；The pin 1,5 and 8 of four high guaily unit chip U4 is hanging.
The output end vo 1 of pre-amplification circuit unit connects the pin 2 of three core jumper wire device P2, the pin 1 of three core jumper wire device P2
Connect the pin 1 of three core jumper wire device P3 and as the output end vo of filter circuit unit 2, three core jumper wire device P2 and three core jumper wire device P3
Pin 3 it is hanging；The pin 2 of three core jumper wire device P3 connects the pin 6 of four high guaily unit chip U4；Pass through three core jumper wire device P2 and three
The vacant or short circuit switching of core jumper wire device P3 can select to be filtered preposition amplified voltage signal, convenient for filter
Wave circuit unit carries out test-based examination.
5th resistance R5 is 1.87k Ω, and the 6th resistance R6 is 17.8k Ω, the 7th resistance R7, the 8th resistance R8, the 11st
Resistance R11, twelfth resistor R12, the 15th resistance R15, the 16th resistance R16 are 3.3 Ω, and the 9th resistance R9 is 2.61k
Ω, the tenth resistance R10 are 18.7k Ω, and thirteenth resistor R13 is 2.15k Ω, and the 14th resistance R14 is 17.8k Ω；6th electricity
It is 1 μ F to hold, and the 7th capacitance C7, the 8th capacitance C8, the 11st capacitance C11, the 12nd capacitance C12 are 6.8 μ F, the 9th capacitance
C9, the tenth capacitance C10, the 13rd capacitance C13, the 15th capacitance C15, the 19th capacitance C19, the 21st capacitance C21 are
100nF, the 14th capacitance C14 are 150nF, and the 16th capacitance C16 is 2.2 μ F, and the 17th capacitance C17, the 18th capacitance C18 are equal
For 10 μ F, the 20th capacitance is 33nF.
As shown in figure 4, rear class amplifier circuit unit includes the 5th amplifier chip U5, the model of the 5th amplifier chip U5
ADOP27GN.The 2 combination hub P4 of output end vo of filter circuit unit, the pin 2 of socket P5 and socket P6, the pin 1 of socket P4
One end of the 17th resistance R17 is connect, the pin 1 of socket P5 connects one end of the 18th resistance R18, and the pin 1 of socket P6 connects the tenth
One end of nine resistance R19；The 5th amplifier of another termination of 17th resistance R17, the 18th resistance R18 and the 19th resistance R19
The pin 2 of chip U5.Short circuit processing is carried out by only one of to socket P4, P5, P6, corresponding times magnification may be selected
Number.The pin 2 of 5th amplifier chip U5 connects one end of the 22nd resistance R22 and the 26th capacitance C26, the 22nd resistance
The pin 6 of the 5th amplifier chip U5 of another termination of R22 and the 26th capacitance C26；The pin 3 of 5th amplifier chip U5 connects
Power foot J3；The pin 7 of 5th amplifier chip U5 passes through the 20th resistance R20 connections power supply foot J1；5th amplifier chip U5's
Pin 7 passes through the 22nd capacitance C22 and the 23rd shunt circuits capacitance C23 connection power supply foot J3.5th amplifier chip U5
Pin 4 pass through the 21st resistance R21 connections and power foot J2；The pin 4 of 5th amplifier chip U5 passes through the 24th capacitance
C24 and the 25th shunt circuits capacitance C25 connection power supply foot J3.The pin 6 of 5th amplifier chip U5 passes through the 27th electricity
Hold the pin 1 that C27 and the 23rd resistance R23 is connected serially to socket P7；The pin 1 of socket P7 is as rear class amplifier circuit unit
Output end, and output signal to NI9239 modules；The pin 2 of socket P7 is grounded；27th capacitance C27 uses electrolytic capacitor,
And the 27th the anode of capacitance C27 connect the pin 6 of the 5th amplifier chip U5；The pin 1,5 and 8 of 5th amplifier chip U5 is outstanding
It is empty.
17th resistance R17 is 100 Ω, and the 18th resistance R18 is 1k Ω, the 19th resistance R19, the 22nd resistance
R22 is 10k Ω, and the 20th resistance R20, the 21st resistance R21 are 3.3 Ω, and the 23rd resistance R23 is 4.7k Ω；
22nd capacitance C22, the 24th capacitance C24, the 26th capacitance C26 are 100nF, the 23rd capacitance C23, second
15 capacitance C25 are that 1 μ F, the 27th capacitance C27 is 470 μ F.
As shown in figure 5, the power supply of circuit module is provided by power supply foot J1, J2, J3 of power supply circuit, power supply foot J1,
The supply voltage of J2, J3 are respectively 18V, 0V, 9V.Power supply circuit includes the 6th amplifier chip U6, the type of the 6th amplifier chip U6
Number be TL081CN；The pin 1 of power outlet (PWR2.5) connects the anode of rectifier diode D1, and the cathode of rectifier diode D1 connects
The pin 1 of three terminal regulator V1；The model MC7818CT of three terminal regulator V1；The pin 2 of three terminal regulator V1 connects power supply and inserts
The pin 2 of seat；The both ends of 28th capacitance C28 connect the pin 1 and pin 2 of three terminal regulator V1 respectively.Three terminal regulator V1
Pin 3 connect the 6th amplifier chip U6 pin 7 and as power supply foot J1, the 6th amplifier chip U6 pin 2 connection the 6th fortune
Put the pin 6 of chip U6 and as power supply foot J3；The pin 3 of 6th amplifier chip U6 passes through the 24th resistance R24 connections
The pin 7 of six amplifier chip U6；The pin 3 of 6th amplifier chip U6 passes through the 29th capacitance C29 and the 25th resistance R25
Shunt circuit is grounded；29th capacitance C29 uses electrolytic capacitor, and the anode of the 29th capacitance C29 connects the 6th amplifier core
The pin 3 of piece U6；The pin 4 of 6th amplifier chip U6 is grounded and as power supply foot J2；Pin 1,5 and of 6th amplifier chip U6
8 is hanging.
24th resistance R24, the 25th resistance R25 are 3.3M Ω；28th capacitance C28 be 330nF, second
19 capacitance C29 are 100 μ F, the model 1N4004 of rectifier diode D1.
The Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor, operation principle are as follows：
Using three induction type magnetic sensors；4 central axis of shell of two of which induction type magnetic sensor is respectively positioned on flat
In the A of face, it is respectively facing East and West direction and north-south, the magnetic field observation for east-west direction, south-north direction；Another induction type magnetic passes
4 central axis upright of shell of sensor is in plane A, for the magnetic field observation perpendicular to plane A；Data acquisition module is placed on sight
Interior is surveyed, and passes through shielding line and connects induction type magnetic sensor.The magnetic coil module and circuit module of induction type magnetic sensor are adopted
With split-type design, the long-term observation convenient for Electromagnetism of Earthquake disturbing signal and daily maintenance.It is buried after the processing of magnetic coil module sealing
In the underground outside sight chamber, cabinet installation circuit module is set around magnetic coil module, cabinet properly protects, including rain-proof,
It is tamper-proof etc..
The voltage signal that pre-amplification circuit unit exports induction coil 3 compensates amplification, directly affects induction type
The signal-to-noise ratio of Magnetic Sensor entirety.According to the equivalent circuit amplitude versus frequency characte and phase-frequency characteristic of magnetic coil module it is found that induction coil
Impedance increases with the increase of Electromagnetism of Earthquake disturbing signal frequency, and feedback resistance (the first electricity of pre-amplification circuit unit
Hindering R1) resistance value is certain, and preposition amplification factor is equal to the ratio between the resistance value of feedback resistance and induction coil.Using induction coil itself
Feature realizes compensation amplification, and amplification factor is larger when low frequency, and with the increase of frequency, amplification factor is gradually reduced.
It is dry that the 50Hz power frequencies that amplifier circuit unit compensates in amplified voltage signal are set in the reduction of filter circuit unit before menstruation
Disturb and Electromagnetism of Earthquake disturbing signal in insensitive upper frequency (1kHz or more) ingredient.The input terminal of filter circuit unit connects
On the pin 2 of three core jumper wire device P2, the pin 1 of the pin 1 of three core jumper wire device P2 and three core jumper wire device P3 connect filter circuit
The output end vo 2 of unit.It is preceding when 2 feet of three core jumper wire device P2 are connect with 3 feet and 1 foot of three core jumper wire device P3 is connect with 2 feet
Set the filtered circuit unit processing of amplifying circuit.When 1 foot of three core jumper wire device P2 and 2 feet connection and three core jumper wire device P3 2
When foot and 3 feet connect, pre-amplification circuit unit is directly entered rear class amplifying circuit list without filter circuit cell processing
Member.By the design, it is convenient for the test and inspection of filter circuit unit.
Rear class amplifier circuit unit receives the amplified voltage signal of compensation that pre-amplification circuit transmits, or accepts filter
The filtered voltage signal of circuit unit, and the voltage value of voltage signal is amplified in the acquisition range of data acquisition module；
Rear class amplifier circuit unit selects the amplifier chip of ADOP27GN models, the setting of feedback resistance (the 22nd resistance R22) resistance value
For 10k Ω, socket series connection 10k Ω resistance (the 19th resistance R19), the 1k Ω of two cores are passed through by the reverse side in amplifier respectively
Resistance (the 18th resistance R18), 100 Ω resistance (the 17th resistance R17) as needed connect corresponding two cores socket short
Road selects rear class amplification factor for 1 times, 10 times or 100 times.
For the induction type magnetic sensor of the utility model design using high magnetic permeability permalloy as core material, circuit is logical
Cross preposition amplification, be filtered with rear class Enlargement Design, transducer sensitivity is high, noise level is low；Data acquisition module uses
NI data acquisition platforms are by data transmission and store to computer, pass through Real time vision waveform, stability height, reliability
By force, the demand that preferably contentedly seismoelectric magnetic disturbance is observed.
Claims (8)
1. the Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor, including data acquisition module and induction type magnetic sensing
Device, it is characterised in that：The core of the data acquisition module uses NI data acquisition platforms, NI data acquisition platforms to select single
NI9239 modules slot NI CompactDAQ USB cabinets cDAQ-9171 and be connected on the cabinet；The induction type magnetic
Sensor includes magnetic coil module and circuit module；Electromagnetism of Earthquake disturbing signal is converted to voltage signal by magnetic coil module, so
Carry out preposition amplification by oversampling circuit module, be filtered and rear class amplification after through NI9239 modules be transmitted to single slot NI
CompactDAQ USB cabinet cDAQ-9171, then it is transmitted to computer；
The magnetic coil module includes magnetic core, skeleton, induction coil and shell；Magnetic core both ends are fixed on by support base outer
On shell, skeleton is coaxially nested with outside magnetic core；The magnetic core is stacked together successively by multi-disc thin slice；The skeleton includes one
The centre bore of molding multiple reels and connecting cylinder, reel and connecting cylinder is square hole, and adjacent reel passes through connecting cylinder
Connection；Reel both ends are equipped with the shaft shoulder；Induction coil is wound on each reel, is drawn after all induction coil series connection defeated
Outlet；It is located in shell around each induction coil and fills non-magnetic material；
The circuit module includes pre-amplification circuit unit, filter circuit unit and rear class amplifier circuit unit；Described
Pre-amplification circuit unit includes the first amplifier chip U1, the model OP07CN of the first amplifier chip U1；Induction coil it is defeated
The pin 1 and pin 2 of outlet signal wire combination hub P1, and the output end shielded layer of induction coil is connect by the pin 3 of socket P1
Ground；The pin 1 of socket P1 is connected to the pin 2 of the first amplifier chip U1；The pin 2 of first amplifier chip U1 meets first resistor R1
And the 5th capacitance C5 one end, the pin 6 of the first amplifier chip of another termination U1 of first resistor R1 and the 5th capacitance C5；Socket
The pin 2 of P1 connects the pin 3 of the first amplifier chip U1 and one end of second resistance R2, another termination power supply of second resistance R2
Foot J3；The pin 3 of socket P1 is grounded；The pin 4 of first amplifier chip U1 passes through 3rd resistor R3 connections power supply foot J2；First fortune
The pin 4 for putting chip U1 connects the other end of one end of the second capacitance C2 and the 4th capacitance C4, the second capacitance C2 and the 4th capacitance C4
Connection power supply foot J3；The pin 7 of first amplifier chip U1 passes through 3rd resistor R4 connections power supply foot J1；First amplifier chip U1's
Pin 7 connects the other end connection power supply foot of one end of the first capacitance C1 and third capacitance C3, the first capacitance C1 and third capacitance C3
J3；The pin 6 of first amplifier chip U1 is the output end vo 1 of pre-amplification circuit unit；The pin 1,5 of first amplifier chip U1
It is hanging with 8；
The filter circuit unit includes first order filter circuit, second level filter circuit and third level filter circuit；It is described
First order filter circuit include the second amplifier chip U2, the model ADOP27GN of the second amplifier chip U2；Preposition amplification electricity
The output end vo 1 of road unit is connected serially to the pin 3 of the second amplifier chip U2 by the 5th resistance R5 and the 6th resistance R6；Second fortune
The pin 3 for putting chip U2 is connected to power supply foot J3 by the 6th capacitance C6；The connection of 5th resistance R5 and the 6th resistance R6 terminates
The second amplifier chip of another termination U2's of one end of 7th capacitance C7 and the 8th capacitance C8, the 7th capacitance C7 and the 8th capacitance C8
Pin 6；The pin 2 of second amplifier chip U2 connects the pin 6 of the second amplifier chip U2；The pin 4 of second amplifier chip U2 is logical
It crosses the 7th resistance R7 and is connected to power supply foot J2；The pin 4 of second amplifier chip U2 is connected to power supply foot J3 by the 9th capacitance C9；
The pin 7 of second amplifier chip U2 is connected to power supply foot J1 by the 8th resistance R8；The pin 7 of second amplifier chip U2 passes through
Ten capacitance C10 are connected to power supply foot J3；The pin 1,5 and 8 of second amplifier chip U2 is hanging；
The second level filter circuit includes third amplifier chip U3, the model ADOP27GN of third amplifier chip U3；The
The pin 6 of second amplifier chip U2 of level-one filter circuit is used as input terminal, and passes through the 9th resistance R9 and the tenth resistance R10 strings
It is coupled to the pin 3 of third amplifier chip U3；The pin 3 of third amplifier chip U3 is connected to power supply foot by the 14th capacitance C14
J3；One end of connection termination the 11st capacitance C11 and the 12nd capacitance C12 of 9th resistance R9 and the tenth resistance R10, the 11st
The other end of capacitance C11 and the 12nd capacitance C12 connect the pin 6 of third amplifier chip U3；The pin 2 of third amplifier chip U3
Connect the pin 6 of third amplifier chip U3；The pin 4 of third amplifier chip U3 passes through eleventh resistor R11 connections power supply foot J2；
The pin 4 of third amplifier chip U3 passes through the 13rd capacitance C13 connections power supply foot J3；The pin 7 of third amplifier chip U3 passes through
Twelfth resistor R12 connections power supply foot J1；The pin 7 of third amplifier chip U3 is connected to power supply foot by the 15th capacitance C15
J3；The pin 1,5 and 8 of third amplifier chip U3 is hanging；
The third level filter circuit includes four high guaily unit chip U4, the model ADOP27GN of four high guaily unit chip U4；The
The pin 6 of the third amplifier chip U3 of secondary filter circuit is used as input terminal, and passes through thirteenth resistor R13 and the 14th resistance
R14 is connected serially to the pin 3 of four high guaily unit chip U4；The pin 3 of four high guaily unit chip U4 is powered by the 20th capacitance C20 connections
Foot J3；The connection of thirteenth resistor R13 and the 14th resistance R14 terminate the 16th capacitance C16, the 17th capacitance C17 and the tenth
One end of eight capacitance C18, the 16th capacitance C16, the 17th capacitance C17 and the 18th capacitance C18 another termination four high guaily unit
The pin 6 of chip U4；The pin 2 of four high guaily unit chip U4 connects the pin 6 of four high guaily unit chip U4；Four high guaily unit chip U4's
Pin 4 passes through the 15th resistance R15 connections power supply foot J2；The pin 4 of four high guaily unit chip U4 passes through the 19th capacitance C19 connections
Power foot J3；The pin 7 of four high guaily unit chip U4 passes through the 16th resistance R16 connections power supply foot J1；Four high guaily unit chip U4's
Pin 7 passes through the 21st capacitance C21 connections power supply foot J3；The pin 1,5 and 8 of four high guaily unit chip U4 is hanging；
The output end vo 1 of pre-amplification circuit unit connects the pin 2 of three core jumper wire device P2, and the pin 1 of three core jumper wire device P2 connects three
The pin 1 of core jumper wire device P3 and as the output end vo of filter circuit unit 2, the pipe of three core jumper wire device P2 and three core jumper wire device P3
Foot 3 is hanging；The pin 2 of three core jumper wire device P3 connects the pin 6 of four high guaily unit chip U4；
The rear class amplifier circuit unit includes the 5th amplifier chip U5, the model ADOP27GN of the 5th amplifier chip U5；
The pin 1 of the 2 combination hub P4 of output end vo of filter circuit unit, the pin 2 of socket P5 and socket P6, socket P4 connects the 17th electricity
One end of R17 is hindered, the pin 1 of socket P5 connects one end of the 18th resistance R18, and the pin 1 of socket P6 connects the 19th resistance R19's
One end；The pin of the 5th amplifier chip U5 of another termination of 17th resistance R17, the 18th resistance R18 and the 19th resistance R19
2；The pin 2 of 5th amplifier chip U5 connects one end of the 22nd resistance R22 and the 26th capacitance C26, the 22nd resistance
The pin 6 of the 5th amplifier chip U5 of another termination of R22 and the 26th capacitance C26；The pin 3 of 5th amplifier chip U5 connects
Power foot J3；The pin 7 of 5th amplifier chip U5 passes through the 20th resistance R20 connections power supply foot J1；5th amplifier chip U5's
Pin 7 passes through the 22nd capacitance C22 and the 23rd shunt circuits capacitance C23 connection power supply foot J3；5th amplifier chip U5
Pin 4 pass through the 21st resistance R21 connections and power foot J2；The pin 4 of 5th amplifier chip U5 passes through the 24th capacitance
C24 and the 25th shunt circuits capacitance C25 connection power supply foot J3；The pin 6 of 5th amplifier chip U5 passes through the 27th electricity
Hold the pin 1 that C27 and the 23rd resistance R23 is connected serially to socket P7；The pin 1 of socket P7 is as rear class amplifier circuit unit
Output end, and output signal to NI9239 modules；The pin 2 of socket P7 is grounded；27th capacitance C27 uses electrolytic capacitor,
And the 27th the anode of capacitance C27 connect the pin 6 of the 5th amplifier chip U5；The pin 1,5 and 8 of 5th amplifier chip U5 is outstanding
It is empty；
The power supply of the circuit module is provided by power supply foot J1, J2, J3 of power supply circuit, the power supply of power supply foot J1, J2, J3
Voltage is respectively 18V, 0V, 9V.
2. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The magnetic core is integrally rectangle, and sheeting is the permalloy 1J85 of high magnetic permeability.
3. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The skeleton uses phenolic resin material；Induction coil is formed with the copper enameled wire coiling of a diameter of 0.29mm, and the number of turns is
28000 circles, length 200mm, thickness 19.5mm；Shell uses PVC material, and non-magnetic material is foamed plastics.
4. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The first resistor R1 and second resistance R2 is 3.3M Ω；3rd resistor R3 and the 4th resistance R4 is 3.3 Ω；First electricity
It is 100nF to hold C1 and the second capacitance C2；Third capacitance C3 and the 4th capacitance C4 is 1 μ F.
5. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The 5th resistance R5 is 1.87k Ω, and the 6th resistance R6 is 17.8k Ω, the 7th resistance R7, the 8th resistance R8, the 11st electricity
It is 3.3 Ω to hinder R11, twelfth resistor R12, the 15th resistance R15, the 16th resistance R16, and the 9th resistance R9 is 2.61k Ω,
Tenth resistance R10 is 18.7k Ω, and thirteenth resistor R13 is 2.15k Ω, and the 14th resistance R14 is 17.8k Ω；6th capacitance is
1 μ F, the 7th capacitance C7, the 8th capacitance C8, the 11st capacitance C11, the 12nd capacitance C12 are 6.8 μ F, the 9th capacitance C9,
Ten capacitance C10, the 13rd capacitance C13, the 15th capacitance C15, the 19th capacitance C19, the 21st capacitance C21 are 100nF,
14th capacitance C14 is 150nF, and the 16th capacitance C16 is 2.2 μ F, and the 17th capacitance C17, the 18th capacitance C18 are 10 μ
F, the 20th capacitance are 33nF.
6. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The 17th resistance R17 is 100 Ω, and the 18th resistance R18 is 1k Ω, the 19th resistance R19, the 22nd resistance R22
It is 10k Ω, the 20th resistance R20, the 21st resistance R21 are 3.3 Ω, and the 23rd resistance R23 is 4.7k Ω；Second
12 capacitance C22, the 24th capacitance C24, the 26th capacitance C26 are 100nF, the 23rd capacitance C23, the 25th
Capacitance C25 is that 1 μ F, the 27th capacitance C27 is 470 μ F.
7. the Electromagnetism of Earthquake disturbance observation system according to claim 1 based on induction type magnetic sensor, it is characterised in that：
The power supply circuit includes the 6th amplifier chip U6, the model TL081CN of the 6th amplifier chip U6；The pin of power outlet
1 connects the anode of rectifier diode D1, and the cathode of rectifier diode D1 connects the pin 1 of three terminal regulator V1；Three terminal regulator V1's
Model MC7818CT；The pin 2 of three terminal regulator V1 connects the pin 2 of power outlet；Distinguish at the both ends of 28th capacitance C28
Connect the pin 1 and pin 2 of three terminal regulator V1；The pin 3 of three terminal regulator V1 connects pin 7 and the conduct of the 6th amplifier chip U6
The pin 2 of power supply foot J1, the 6th amplifier chip U6 connect the pin 6 of the 6th amplifier chip U6 and as power supply foot J3；6th fortune
The pin 3 for putting chip U6 passes through the pin 7 of the 6th amplifier chip U6 of the 24th resistance R24 connections；6th amplifier chip U6's
Pin 3 is grounded by the 29th capacitance C29 and the 25th shunt circuits resistance R25；29th capacitance C29 is using electrolysis
Capacitance, and the anode of the 29th capacitance C29 connects the pin 3 of the 6th amplifier chip U6；The pin 4 of 6th amplifier chip U6 is grounded
And as power supply foot J2；The pin 1,5 and 8 of 6th amplifier chip U6 is hanging.
8. the Electromagnetism of Earthquake disturbance observation system according to claim 7 based on induction type magnetic sensor, it is characterised in that：
24th resistance R24, the 25th resistance R25 is 3.3M Ω；28th capacitance C28 be 330nF, the 20th
Nine capacitance C29 are 100 μ F, the model 1N4004 of rectifier diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820579570.4U CN208060735U (en) | 2018-04-20 | 2018-04-20 | Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820579570.4U CN208060735U (en) | 2018-04-20 | 2018-04-20 | Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208060735U true CN208060735U (en) | 2018-11-06 |
Family
ID=63982534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820579570.4U Expired - Fee Related CN208060735U (en) | 2018-04-20 | 2018-04-20 | Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208060735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594315A (en) * | 2018-04-20 | 2018-09-28 | 江苏省地震局 | Electromagnetism of Earthquake disturbance observation system and observation procedure based on induction type magnetic sensor |
-
2018
- 2018-04-20 CN CN201820579570.4U patent/CN208060735U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594315A (en) * | 2018-04-20 | 2018-09-28 | 江苏省地震局 | Electromagnetism of Earthquake disturbance observation system and observation procedure based on induction type magnetic sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206930736U (en) | One kind is used for high-tension cable many reference amounts detection means | |
| CN103777151B (en) | Magnetic field sensor | |
| CN103529366A (en) | UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system | |
| CN103630853B (en) | induction type magnetic field sensor | |
| CN106018942B (en) | It is a kind of for measuring the current sensor array and measurement method of three-phase current | |
| CN101819224B (en) | Lightning current measuring transducer based on differential ring | |
| CN203480051U (en) | Mining intrinsic safety type transient electromagnetic instrument receiving antenna | |
| CN208060735U (en) | Electromagnetism of Earthquake disturbance observation system based on induction type magnetic sensor | |
| CN103472490A (en) | Mining intrinsic safety type transient electromagnetic instrument receiving antenna | |
| CN104950189A (en) | Measuring probe for optical fiber power-frequency high-voltage electric field | |
| CN108594315A (en) | Electromagnetism of Earthquake disturbance observation system and observation procedure based on induction type magnetic sensor | |
| CN108169575A (en) | The test device and method of a kind of CVT capacitances dielectric loss and capacitance | |
| CN104076185A (en) | Differential ring lightning current sensor based on printed circuit board and digital integration | |
| CN108415086A (en) | The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus | |
| CN209327498U (en) | Fault traveling wave signal coupling sensor for online fault location device | |
| CN107607888A (en) | A kind of three-dimensional transient transcendence measuring system | |
| CN205135598U (en) | Multi -parameter logging instrument | |
| CN207798953U (en) | A kind of test device of CVT capacitances dielectric loss and capacitance | |
| CN111856345A (en) | Broadband magnetic field sensor device and method for measuring impulse current | |
| CN203133022U (en) | Tester for water content in concrete | |
| CN206594317U (en) | Hydrophone sensitivity detector and its sound pressure signal collecting mechanism | |
| CN108627869A (en) | Differential match lattice Neck fiber optic interferometric senses geophone | |
| CN208367226U (en) | Differential match lattice Neck fiber optic interferometric senses geophone | |
| CN205139139U (en) | Rock specimen electrical property characteristic testing arrangement under many field couplings state | |
| CN209728089U (en) | A kind of portable cable detecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 Termination date: 20200420 |