CN206594280U - The measuring circuit of three-component magnetic gradiometer - Google Patents

The measuring circuit of three-component magnetic gradiometer Download PDF

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Publication number
CN206594280U
CN206594280U CN201620849271.9U CN201620849271U CN206594280U CN 206594280 U CN206594280 U CN 206594280U CN 201620849271 U CN201620849271 U CN 201620849271U CN 206594280 U CN206594280 U CN 206594280U
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pin
electric capacity
chip
resistance
nonpolar electric
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夏冰
章雪挺
王周
张明
陶维涛
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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Abstract

The utility model discloses a kind of measuring circuit of three-component magnetic gradiometer, the circuit includes power circuit, collecting sensor signal circuit, data transmission circuit and governor circuit, and wherein collecting sensor signal circuit includes signal conditioning circuit and D/A converting circuit；The utility model make use of the features such as high-resolution of sensor, low-power consumption.In power supply branch, preceding level power supply increases the operating efficiency of power supply using DC/DC, and rear class power utilization linear power supply reduces the ripple and noise of power supply, and reliable and stable, clean power supply is provided for subsequent conditioning circuit.When circuit works, operating current is about 170mA, realizes low-power consumption.In sensor signal conditioning circuit, the amplifier chip that have selected extremely low noise improves the effective resolution of measuring circuit with high-precision modulus conversion chip.

Description

The measuring circuit of three-component magnetic gradiometer
Technical field
The utility model belongs to navigation, the magnetic prospecting technology of aviation field, and in particular to a kind of three-component magnetic gradient The measuring circuit of instrument.
Background technology
Magnetic gradiometer is mainly used in the measurement of nearly magnetic field sources surrounding magnetic field, determines the instrument of magnetic field gradient, such as biological magnetic The measurement of field and the detection of underground ferromagnetism embedded part etc..Magnetic field gradient is vector, what magnetic gradiometer was determined be magnetic field some The Grad in direction.Existing gradiometry is usually that 2 magnetic sensitive systems are placed on the fixed range in some direction, is existed respectively Two places of beginning and end of carrier movement measure nearly magnetic field intensity, do difference and eliminate the influence that background magnetic field is brought, thus The relative variation in magnetic field, i.e. Grad are obtained, the motion state of carrier can be further confirmed that.At home, magnetic gradient is surveyed The effective means for being all the time geology and marine field investigation is visited, as countries in the world are developed increasingly to Deep Sea Minerals Attention and the increase in demand of Military application, magnetic gradient exploration are gradually applied in marine field.
The content of the invention
The utility model is in view of the shortcomings of the prior art, it is proposed that a kind of measuring circuit of three-component magnetic gradiometer.
A kind of measuring circuit of three-component magnetic gradiometer, including power circuit, collecting sensor signal circuit, data are passed Transmission of electricity road and governor circuit, wherein collecting sensor signal circuit include signal conditioning circuit and D/A converting circuit；
Described power circuit includes+13V output power supply circuits, -13V output power supply circuits ,+6.5V buffer voltagcs electricity Road ,+3.3V output power supply circuits ,+5V output power supply circuits ,+4.5V output power supply circuits ,+2.5V reference voltage power circuits； Power circuit is responsible for providing positive and negative 13V power supplys powers to sensor, and passes through middle obtained+6.5V buffer voltagcs circuit and line Property power circuit obtains ripple less 5V and 3.3V；Wherein 5V powers to high-precision adc, the 4.5V subsequently produced High accuracy, the bias voltage of Low Drift Temperature are provided for signal conditioning circuit；+ 2.5V reference voltages power circuit is modulus conversion chip Stable reference voltage is provided；
+ 12V output power supply circuits include switching power source chip IC1, the first nonpolar electric capacity C1, the second nonpolar electric capacity C2, the 3rd nonpolar electric capacity C3, the 4th nonpolar electric capacity C4, the 5th nonpolar electric capacity C5, the first polar capacitor Cp1, the second pole Property electric capacity Cp2, first resistor R1, second resistance R2,3rd resistor R3, the first Schottky diode D1, the first inductance L1, first Paster switchs K1 and the first connector P1；
Switching power source chip IC1 7 pin, the first nonpolar electric capacity C1 one end, the second nonpolar electric capacity C2 one end, One polar capacitor Cp1 positive pole and the first Schottky diode D1 negative electrode connect+24 input voltage；First Schottky diode D1 anode and the first paster switch K1 one end are connected, the first paster switch K1 other end and the 1 of the first connector P1 Pin is connected, and the first connector P1 2 pin are connected and are grounded with the first polar capacitor Cp1 negative pole；The 6 of switching power source chip IC1 Pin, 9 pin, the first nonpolar electric capacity C1 other end, the second nonpolar electric capacity C2 other end, second resistance R2 one end, One end of two polar capacitor Cp2 negative pole, the 4th nonpolar electric capacity C4 one end and the 5th nonpolar electric capacity C5 is all grounded；Switch Power supply chip IC1 2 pin, 3 pin, 5 pin are all hanging；Switching power source chip IC1 1 pin connects the 3rd nonpolar electric capacity C3 one end； Switching power source chip IC1 8 pin, the 3rd nonpolar electric capacity C3 other end, the second Schottky diode D2 negative electrode connect first Inductance L1 one end, it is the first inductance L1 other end, first resistor R1 one end, the second polar capacitor Cp2 positive pole, the 4th non- One end of the polar capacitor C4 other end, the 5th nonpolar electric capacity C5 another termination 3rd resistor R3；3rd resistor R3's is another One end as voltage+12V output end；Second Schottky diode D2 plus earth；The first resistor R1 other end, second The resistance R2 other end connects and connects switching power source chip IC1 4 pin；Switching power source chip IC1 is using Texas Instruments High stable, Low Drift Temperature power supply chip TPS5430；
- 12V output power supply circuits include switching power source chip IC2, linear voltage regulator chip IC 3, the 3rd polar capacitor Cp3, quadripolarity electric capacity Cp4, the 5th polar capacitor Cp5, the 6th polar capacitor Cp6, the 7th polar capacitor Cp7, ends of the earth property The electric capacity nonpolar electric capacity C6 of Cp8, the 9th polar capacitor Cp9, the tenth polar capacitor Cp10, the 11st polar capacitor Cp11, the 6th, 7th nonpolar electric capacity C7, the 8th nonpolar electric capacity C8, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance The inductance L2 of R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, second and the 3rd Schottky diode D3；
Switching power source chip IC2 2 pin, the 3rd polar capacitor Cp3 positive pole, quadripolarity electric capacity Cp4 positive pole, the 5th Polar capacitor Cp5 positive pole and the 6th polar capacitor Cp6 positive pole connect and connect+24V inputs, and the 3rd polar capacitor Cp3's is negative Pole is grounded；Switching power source chip IC2 1 pin connects the 6th nonpolar electric capacity C6 one end；Switching power source chip IC2 3 pin are hanging； Switching power source chip IC2 4 pin connect the 4th resistance R4 one end；Quadripolarity electric capacity Cp4 negative pole, the 5th polar capacitor Cp5 Negative pole and the 6th polar capacitor Cp6 negative pole, the 4th resistance R4 other end, switching power source chip IC2 7 pin and 9 pin, Seven nonpolar electric capacity C7 one end, the 8th nonpolar electric capacity C8 one end, the 3rd Schottky diode D3 anode, the 7th resistance R7 one end, the 7th polar capacitor Cp7 negative pole, the 8th polar capacitor Cp8 negative pole, the 9th polar capacitor Cp9 negative pole connect 8th resistance R8 one end；
Switching power source chip IC2 5 pin, the 7th resistance R7 other end and the 6th resistance R6 one end connects；Switch electricity Source chip IC2 6 pin, the 5th resistance R5 one end are connected with the 8th nonpolar electric capacity C8 other end；5th resistance R5's The 7th nonpolar electric capacity C7 of another termination other end；Switching power source chip IC2 8 pin, the 6th nonpolar electric capacity C6 it is another The one end at end, the 3rd Schottky diode D3 negative electrode and the second inductance L2 is connected；The second inductance L2 other end, the 6th electricity Hinder the R6 other end, the 7th polar capacitor Cp7 positive pole, the 8th polar capacitor Cp8 positive pole and the 9th polar capacitor Cp9 just Pole is grounded；2 pin, the tenth polar capacitor Cp10 negative pole of linear voltage regulator chip IC 3 are connected to the 8th resistance R8 other end；Line Property voltage regulator chip IC3 1 pin, the 9th resistance R9 one end are connected with the tenth resistance R10 one end；Linear voltage regulator chip IC3 3 pin, the 9th resistance R9 other end and the 11st polar capacitor Cp11 negative pole is connected to -12V output ends；Tenth polarity The positive pole of electric capacity Cp10 positive pole, the tenth resistance R10 other end and the 11st polar capacitor Cp11 is all grounded；Switching Power Supply core Piece IC2 uses Texas Instruments power supply chip TPS54360, and linear voltage regulator chip IC 3 is using Texas Instruments' power supply core Piece LM337；
+ 6.5V output power supply circuits include switching power source chip IC4, the 8th nonpolar electric capacity C8, the 9th nonpolar electric capacity C9, the tenth nonpolar electric capacity C10, the 11st nonpolar electric capacity C11, the 12nd nonpolar electric capacity C12, the 12nd polar capacitor Cp12, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 4th Schottky diode D4 and the 3rd inductance L3；
One termination of switching power source chip IC4 7 pin, the 8th nonpolar electric capacity C8 one end and the 9th nonpolar electric capacity C9 + 24 input voltage；Switching power source chip IC4 6 pin, 9 pin, the 8th nonpolar electric capacity the C8 other end, the 9th nonpolar electricity Hold the C9 other end, the 12nd polar capacitor Cp12 negative pole, the 12nd resistance R12 one end, the 11st nonpolar electric capacity C11 One end and the 12nd nonpolar electric capacity C12 one end be all grounded；Switching power source chip IC4 2 pin, 3 pin, 5 pin are all hanging；Open Powered-down source chip IC4 1 pin connects the tenth nonpolar electric capacity C10 one end；Switching power source chip IC4 8 pin, the tenth nonpolar electricity The other end, the 4th Schottky diode D4 negative electrode for holding C10 connect the 3rd inductance L3 one end, the 3rd inductance L3 other end, 11st resistance R11 one end, the 12nd polar capacitor Cp12 positive pole, the 11st nonpolar electric capacity C11 one end, the 12nd Nonpolar electric capacity C12 a 13rd resistance R13 of termination one end；The 13rd resistance R13 other end is used as voltage+6.5V's Output end；4th Schottky diode D4 plus earth；The 11st resistance R11 other end is another with the 12nd resistance R12's One end connects and connects switching power source chip IC4 4 pin；Switching power source chip IC4 uses the high stable of Texas Instruments, low temperature Float power supply chip TPS5430；
+ 5V output power supply circuits include linear voltage regulator chip IC 5, the 13rd polar capacitor Cp13, the tenth quadripolarity electricity Hold Cp14, the 15th polar capacitor Cp15, the 16th polar capacitor Cp16；Switching power source chip IC5 3 pin, the 13rd polarity Electric capacity Cp13 positive pole and the tenth quadripolarity electric capacity Cp14 positive pole are connected to+6.5V output end；The 2 of switching power source chip IC5 The positive pole of pin, the 15th polar capacitor Cp15 positive pole and the 16th polar capacitor Cp16 is connected to+V5 output end, the 13rd pole Property electric capacity Cp13 negative pole, the tenth quadripolarity electric capacity Cp14 negative pole, the 15th polar capacitor Cp15 negative pole, the tenth sextupole Electric capacity Cp16 negative pole ground connection, switching power source chip IC5 1 pin ground connection；Linear voltage regulator chip IC 5 uses the electricity of Linear Tech Source chip LT1085；
+ 3.3V output power supply circuits include the polar capacitor Cp17 of linear voltage regulator chip IC the 6, the 17th, the tenth ends of the earth property Electric capacity C18, the 13rd nonpolar electric capacity C13, the 14th nonpolar electric capacity C14, the 14th resistance R14 and the 15th resistance R15 With the first light emitting diode；
3 pin, the 17th polar capacitor Cp17 positive pole and the 13rd nonpolar electric capacity C13 of linear voltage regulator chip IC 6 One termination power circuit+5V power output ends；1 pin of linear voltage regulator chip IC 6, the 17th polar capacitor Cp17 it is negative Pole and the 13rd nonpolar electric capacity the C13 other end are all grounded；2 pin, 4 pin, the tenth ends of the earth property electricity of linear voltage regulator chip IC 6 Positive pole, the 14th nonpolar electric capacity C14 one end and the 14th resistance R14 end for holding Cp18 are connected to together and by the tenth Five resistance R15 are connected to+3.3V reference voltage output ends；The another of 14th resistance R14 terminates to the first LED 1 Anode；The other end and the first LED 1 of 18th polar capacitor Cp18 negative pole, the tenth quadripolarity electric capacity C14 Negative electrode be all grounded；Linear voltage regulator chip IC 6 uses the power supply chip AMS117-3.3 of Texas Instruments；
+ 4.5V reference voltage circuits include the first reference voltage chip IC 7, the first operational amplifier chip IC8, the 15th Nonpolar electric capacity C15, the 16th nonpolar electric capacity C16, the 17th nonpolar electric capacity C17, the 18th nonpolar electric capacity C18, the 19 nonpolar electric capacity C19, the 16th resistance R4；
+ 5V the electricity of 2 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15 a termination power circuit Source output terminal, 4 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15 other end ground connection, the first benchmark electricity 5 pin of chip IC 7 are pressed to be grounded by the 16th nonpolar electric capacity C16,6 pin of the first reference voltage chip IC 7 and the 16th electricity Hinder R16 one end, the 17th nonpolar electric capacity C17 one end connection, the 17th nonpolar electric capacity C17 other end ground connection；The 3 pin of the 16 resistance R16 other end, a 18th nonpolar electric capacity C18 first operational amplifier chip IC8 of termination, the One operational amplifier chip IC8 2 pin ground connection；First operational amplifier chip IC8 5 pin and the 19th nonpolar electric capacity C19 One end connection be followed by the+5V power output ends of power circuit, the 19th nonpolar electric capacity C19 other end ground connection；First fortune Amplifier chip IC8 1 pin and the connection of 4 pin is calculated ,+4.5V reference voltage output ends, the 1 of the first reference voltage chip IC 7 is used as Pin, 3 pin, 7 pin, 8 foot stools are empty；First reference voltage chip IC 7 using Texas Instrument reference voltage chip REF5045, first Operational amplifier chip IC8 uses the accurate amplifier chip OPA376 of Texas Instrument；
+ 2.5V reference voltage circuits include the second reference voltage chip IC 9, the second operational amplifier chip IC10, second Ten nonpolar electric capacity C20, the 21st nonpolar electric capacity C21, the 22nd nonpolar electric capacity C22, the 23rd nonpolar electricity Hold C23, the 24th nonpolar electric capacity C24 and the 17th resistance R17；
+ 5V the electricity of 2 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20 a termination power circuit Source output terminal, 4 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20 other end ground connection, the second benchmark electricity 5 pin of chip IC 9 are pressed to be grounded by the 21st nonpolar electric capacity C21,6 pin and the 17th of the second reference voltage chip IC 9 Resistance R17 one end, the 22nd nonpolar electric capacity C22 one end connection, the 22nd nonpolar electric capacity C22 another termination Ground；The 17th resistance R17 other end, the one of the 23rd nonpolar electric capacity C23 terminate the second operational amplifier chip IC6's 3 pin, the second operational amplifier chip I0 2 pin ground connection；Second operational amplifier chip IC10 5 pin and the 24th nonpolar Electric capacity C24 one end connection is followed by the+5V power output ends of power circuit, the 24th nonpolar electric capacity C24 another termination Ground；Second operational amplifier chip IC10 1 pin and the connection of 4 pin, are used as+4.5V reference voltage output ends, the first reference voltage 1 pin, 3 pin, 7 pin, 8 foot stools of chip IC 9 are empty；Second reference voltage chip IC 9 uses the reference voltage chip of Texas Instrument REF5025, the second operational amplifier chip IC10 use the accurate amplifier chip OPA376 of Texas Instrument；
Signal conditioning circuit includes the 3rd operational amplifier chip IC11, the 25th nonpolar electric capacity C25, the 26th Nonpolar electric capacity C26, the 27th nonpolar electric capacity C27, the 18th resistance R18, the 19th resistance R9, the 20th resistance R20, 21st resistance R21, the 22nd resistance R22；
18th resistance R18 one end, the 19th resistance R19 a 3rd operational amplifier chip IC11 of termination 3 pin； The 19th resistance R19 other end as sensor voltage output end；18th resistance R18 another termination voltage output electricity + 4.5V the reference voltage output ends on road；20th resistance R20 a 3rd operational amplifier chip IC11 of termination 3 pin, it is another End ground connection；3rd operational amplifier chip IC11 8 pin are connected with the 25th nonpolar electric capacity C25 one end and connect output + 5V the power output ends of power circuit；The 25th nonpolar electric capacity C25 other end and the 3rd operational amplifier chip IC11 4 pin ground connection；21st resistance R21 a 3rd operational amplifier chip IC11 of termination 1 pin, 2 pin；21st resistance The R21 other end and the 22nd resistance R22 one end, the 26th nonpolar electric capacity C26 one end are connected as low pass The input of filter circuit；The 22nd resistance R22 other end, the 27th nonpolar electric capacity C27 one end and the 3rd fortune Calculate amplifier chip IC11 5 pin connection, the 27th nonpolar electric capacity C27 other end ground connection；26th nonpolar electricity Hold the C26 operational amplifier chip IC11 of another termination the 3rd 6 pin and 7 pin and be used as output end；3rd operational amplifier core Piece IC11 uses the high-accuracy amplifier chip OPA2367 and OPA376 of Texas Instruments；
D/A converting circuit includes modulus conversion chip IC12, the 19th polar capacitor Cp19, the 20th polar capacitor Cp20, the 21st polar capacitor Cp21, the 28th nonpolar electric capacity C28, the 29th nonpolar electric capacity C29, the 30th Nonpolar electric capacity C30, the 31st nonpolar electric capacity C31, the 32nd nonpolar electric capacity C32, the 33rd nonpolar electric capacity C33, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, the 26th resistance R26, the 27th Resistance R27, the 28th resistance R28, the 29th resistance R29, the 30th resistance R30 and the first crystal oscillator Y1；
23rd resistance R23 one end, the 19th polar capacitor Cp19 positive pole, the 28th nonpolar electric capacity C28 One end, a 29th nonpolar electric capacity C29 termination modulus conversion chip IC12 4 pin, the 23rd resistance R23's is another + 2.5V the reference voltage output terminals of one termination power circuit, the 24th resistance R24 one end, the 19th polarity Cp19 it is negative Pole, the 28th nonpolar electric capacity C28 other end, the 29th nonpolar electric capacity C29 another termination modulus conversion chip IC12 3 pin, the 24th resistance R24 other end ground connection；Modulus conversion chip IC12 1 pin, the 20th polar capacitor + 5V the power output ends of Cp20 positive pole and the 30th nonpolar electric capacity C30 a termination power circuit, the 20th polar capacitor Cp20 negative pole and the 30th nonpolar electric capacity C30 other end ground connection；Modulus conversion chip IC13 7 pin, 8 pin, 9 pin, 10 Pin, 11 pin, the output end of 12 pin and signal conditioning circuit are connected；Modulus conversion chip IC12 5 pin pass through the 25th resistance + 2.5V reference voltage output terminals the connection of R25 and power circuit, modulus conversion chip IC12 2 pin ground connection；Modulus conversion chip IC12 14 pin, 15 pin, 16 pin, the 33rd nonpolar electric capacity C33 one end, the 21st polar capacitor Cp21 positive pole connects + 3.3V the power output ends of power circuit, modulus conversion chip IC13 17 pin, the 33rd nonpolar electric capacity C33 it is another End, the 21st polar capacitor Cp21 negative pole ground connection；First crystal oscillator Y1 one end and the one of the 31st nonpolar electric capacity C31 Terminate a termination of modulus conversion chip IC12 19 pin, the first crystal oscillator Y1 other end and the 32nd nonpolar electric capacity C32 Modulus conversion chip IC12 18 pin, the 31st nonpolar electric capacity C31 other end and the 32nd nonpolar electric capacity C32's The other end is grounded；A 26th resistance R26 termination modulus conversion chip IC12 24 pin, the one of the 27th resistance R27 Terminate modulus conversion chip IC12 23 pin, a 28th resistance R28 termination modulus conversion chip IC12 22 pin, second A 19 resistance R29 termination modulus conversion chip IC12 21 pin, a 30th resistance R30 termination modulus conversion chip IC13 20 pin, the 30th resistance R30 other end ground connection, modulus conversion chip IC13 6 pin, 13 pin, 25 pin, 26 pin, 27 Pin, 28 foot stools are empty；Modulus conversion chip IC13 uses 24 high precision analogue conversion chip ADS1256 of Texas Instruments；
Data transmission circuit includes multichannel RS232 line drivers/receiver IC13, the 34th nonpolar electric capacity C34, the 35th nonpolar electric capacity C35, the 36th nonpolar electric capacity C36, the 37th nonpolar electric capacity C37, the 30th Eight nonpolar electric capacity C38；
Multichannel RS232 line drivers/receiver IC13 1 pin and the 34th nonpolar electric capacity C34 one end connect Connect, 3 pin are connected with the 34th nonpolar electric capacity C34 other end, 4 pin and the 35th nonpolar electric capacity C35 one end connect Connect, 5 pin are connected with the 35th nonpolar electric capacity C35 other end, 15 pin are directly grounded, and 6 pin are nonpolar by the 36th Electric capacity C36 is grounded, and 2 pin are grounded by the 37th nonpolar electric capacity C37, and the one of 16 pin and the 38th nonpolar electric capacity C38 End connects and connects the output end of+3.3V output power supply circuits, the 38th nonpolar electric capacity C38 other end ground connection, multichannel RS232 line drivers/receiver IC13 11 pin, 12 pin, 13 pin, 14 foot stools are empty, multichannel RS232 line drivers/connect The PC_RXD1 ends of 7 pin and Serial Port Line of receiving device IC13 are connected, multichannel RS232 line drivers/receiver IC13 8 pin with The PC_TX1 ends of Serial Port Line are connected, and multichannel RS-232 line drivers/receiver IC13 uses the MAX3232 of Texas Instrument Chip；
Governor circuit includes main control chip IC14, the 39th nonpolar electric capacity C39, the 40th nonpolar electric capacity C40, the 41 nonpolar electric capacity C41, the 42nd nonpolar electric capacity C42, the 43rd nonpolar electric capacity C43, the 31st resistance R31, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the second crystal oscillator Y2, the 3rd crystal oscillator Y3, knob Detain battery BT1, second switch K2 and LED 2；
39th nonpolar electric capacity C39 one end and a second crystal oscillator Y2 termination main control chip IC14 5 pin, the 4th Ten nonpolar electric capacity C40 one end and the second crystal oscillator Y2 another termination main control chip IC14 6 pin, the 39th nonpolar electricity Hold the C39 other end and the 40th nonpolar electric capacity C40 other end ground connection, a 32nd resistance R32 termination master control core Piece IC6 60 pin, other end ground connection；31st resistance R31 one end, the 41st nonpolar electric capacity C41 one end, second Switch a K2 termination main control chip IC14 7 the pin ,+3.3V power supplys of the 31st resistance R31 another termination power circuit Output end, the 41st nonpolar electric capacity C41 other end is grounded after being connected with the second switch K2 other end；Main control chip IC14 1 pin connects button cell BT1 positive pole, button cell BT1 negative pole ground connection, main control chip IC14 32 pin, 48 pin, 64 Pin, 19 pin, 13 pin all connect the+3.3V power output ends of power circuit, main control chip IC14 31 pin, 47 pin, 63 pin, 18 pin, 12 pin are all grounded；Main control chip IC14 30 pin light two by the 33rd resistance R33 sending and receiving optical diodes LED2 positive pole Pole pipe LED2 negative pole ground connection；42nd nonpolar electric capacity C42 one end, one end of the 34th resistance R34, the 3rd crystal oscillator A Y3 termination main control chip IC15 3 pin, the 43rd nonpolar electric capacity C43 one end, the 34th resistance R34 it is another End, the 3rd crystal oscillator Y3 another termination main control chip IC14 4 pin, the 42nd nonpolar electric capacity C42 other end and the 4th It is grounded after 13 nonpolar electric capacity C43 other end connection；Main control chip IC14 34 pin are connect the 20th in D/A converting circuit The six resistance R26 other end, 35 pin connect the other end of the 28th resistance R28 in D/A converting circuit, and 36 pin connect digital-to-analogue conversion The 27th resistance R27 other end in circuit, 38 pin connect the other end of the 29th resistance R29 in D/A converting circuit；It is main 20 pin, 21 pins, 22 pins, 23 pins of control chip IC 14 are respectively that On-Chip peripheral SPI1 NSS, SCLK, MISO, MOSI draw Pin output end, is connected with the spi bus of TF cards, main control chip IC14 15 pin and multichannel RS232 line drivers/receiver IC13 10 pin connection, main control chip IC14 16 pin are connected with multichannel RS232 line drivers/receiver IC13 9 pin； Main control chip IC14 uses the STM32F103RCT6 chips of ST Microelectronics.
The utility model realizes a kind of measuring circuit of magnetisable material gradient.The high-resolution of sensor is make use of, it is low The features such as power consumption.In power supply branch, preceding level power supply increases the operating efficiency of power supply, rear class power utilization line using DC/DC Property power supply reduces the ripple and noise of power supply, and reliable and stable, clean power supply is provided for subsequent conditioning circuit.When circuit works, Operating current is about 170mA, realizes low-power consumption.In sensor signal conditioning circuit, the amplifier core of extremely low noise have selected Piece improves the effective resolution of measuring circuit with high-precision modulus conversion chip.
Brief description of the drawings
Fig. 1 is the utility model system entire block diagram；
Fig. 2 is the overall structure figure of power circuit；
Fig. 3 be Fig. 2 in+12V output power supply circuits circuit diagram；
Fig. 4 be Fig. 2 in -12V output power supply circuits circuit diagram；
Fig. 5 be Fig. 2 in+6.5V buffer voltagc circuits circuit diagram；
Fig. 6 be Fig. 2 in+5V output power supply circuits circuit diagram；
Fig. 7 be Fig. 2 in+3.3V output power supply circuits circuit diagram；
Fig. 8 be Fig. 2 in+4.5V output reference voltages circuit diagram；
Fig. 9 be Fig. 2 in+2.5V reference voltage power circuits circuit diagram；
Figure 10 is the circuit diagram of signal conditioning circuit；
Figure 11 is the circuit diagram of D/A converting circuit；
Figure 12 is the circuit diagram of data transmission circuit；
Figure 13 is the circuit diagram of governor circuit.
Embodiment
As shown in figure 1, a kind of measuring circuit of magnetisable material, including power circuit I, collecting sensor signal circuit II, Data transmission circuit III, governor circuit IV, wherein collecting sensor signal circuit include signal conditioning circuit and digital-to-analogue conversion electricity Road.
As shown in Fig. 2 power circuit I in Fig. 1 include+13V output power supply circuits 1, -13V output power supply circuits 2 ,+ 6.5V buffer voltagcs circuit 3 ,+3.3V output power supply circuits 4 ,+5V output power supply circuits 5 ,+4.5V output power supply circuits 6 ,+ 2.5V reference voltages power circuit 7.Power circuit is responsible for providing positive and negative 13V power supplys powers to sensor M, and is obtained by centre + 6.5V buffer voltagcs circuit and linear power source circuit obtain ripple less 5V and 3.3V.Wherein 5V turns to high precision analogue Parallel operation is powered, and the 4.5V subsequently produced provides high accuracy, the bias voltage of Low Drift Temperature for signal conditioning circuit.+ 2.5V benchmark electricity Piezoelectricity source circuit provides stable reference voltage for modulus conversion chip.
As shown in figure 3 ,+12V output power supply circuits include switching power source chip IC1, it is the first nonpolar electric capacity C1, second non- Polar capacitor C2, the 3rd nonpolar electric capacity C3, the 4th nonpolar electric capacity C4, the 5th nonpolar electric capacity C5, the first polar capacitor Cp1, the second polar capacitor Cp2, first resistor R1, second resistance R2,3rd resistor R3, the first Schottky diode D1, first Inductance L1, the first paster switch K1 and the first connector P1.
Switching power source chip IC1 7 pin, the first nonpolar electric capacity C1 one end, the second nonpolar electric capacity C2 one end, One polar capacitor Cp1 positive pole and the first Schottky diode D1 negative electrode connect+24 input voltage.First Schottky diode D1 anode and the first paster switch K1 one end are connected, the first paster switch K1 other end and the 1 of the first connector P1 Pin is connected, and the first connector P1 2 pin are connected and are grounded with the first polar capacitor Cp1 negative pole.The 6 of switching power source chip IC1 Pin, 9 pin, the first nonpolar electric capacity C1 other end, the second nonpolar electric capacity C2 other end, second resistance R2 one end, One end of two polar capacitor Cp2 negative pole, the 4th nonpolar electric capacity C4 one end and the 5th nonpolar electric capacity C5 is all grounded；Switch Power supply chip IC1 2 pin, 3 pin, 5 pin are all hanging.Switching power source chip IC1 1 pin connects the 3rd nonpolar electric capacity C3 one end. Switching power source chip IC1 8 pin, the 3rd nonpolar electric capacity C3 other end, the second Schottky diode D2 negative electrode connect first Inductance L1 one end, it is the first inductance L1 other end, first resistor R1 one end, the second polar capacitor Cp2 positive pole, the 4th non- One end of the polar capacitor C4 other end, the 5th nonpolar electric capacity C5 another termination 3rd resistor R3.3rd resistor R3's is another One end as voltage+12V output end.Second Schottky diode D2 plus earth.The first resistor R1 other end, second The resistance R2 other end connects and connects switching power source chip IC1 4 pin.Switching power source chip IC1 is using Texas Instruments High stable, Low Drift Temperature power supply chip TPS5430.
As shown in figure 4, -12V output power supply circuits include switching power source chip IC2, linear voltage regulator chip IC 3, the 3rd Polar capacitor Cp3, quadripolarity electric capacity Cp4, the 5th polar capacitor Cp5, the 6th polar capacitor Cp6, the 7th polar capacitor Cp7, 8th polar capacitor Cp8, the 9th polar capacitor Cp9, the tenth polar capacitor Cp10, the 11st polar capacitor Cp11, the 6th non-pole Property electric capacity C6, the 7th nonpolar electric capacity C7, the 8th nonpolar electric capacity C8, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, The inductance L2 of 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, second and the 3rd Schottky diode D3.
Switching power source chip IC2 2 pin, the 3rd polar capacitor Cp3 positive pole, quadripolarity electric capacity Cp4 positive pole, the 5th Polar capacitor Cp5 positive pole and the 6th polar capacitor Cp6 positive pole connect and connect+24V inputs, and the 3rd polar capacitor Cp3's is negative Pole is grounded.Switching power source chip IC2 1 pin connects the 6th nonpolar electric capacity C6 one end.Switching power source chip IC2 3 pin are hanging. Switching power source chip IC2 4 pin connect the 4th resistance R4 one end.Quadripolarity electric capacity Cp4 negative pole, the 5th polar capacitor Cp5 Negative pole and the 6th polar capacitor Cp6 negative pole, the 4th resistance R4 other end, switching power source chip IC2 7 pin and 9 pin, Seven nonpolar electric capacity C7 one end, the 8th nonpolar electric capacity C8 one end, the 3rd Schottky diode D3 anode, the 7th resistance R7 one end, the 7th polar capacitor Cp7 negative pole, the 8th polar capacitor Cp8 negative pole, the 9th polar capacitor Cp9 negative pole connect 8th resistance R8 one end.
Switching power source chip IC2 5 pin, the 7th resistance R7 other end and the 6th resistance R6 one end connects.Switch electricity Source chip IC2 6 pin, the 5th resistance R5 one end are connected with the 8th nonpolar electric capacity C8 other end.5th resistance R5's The 7th nonpolar electric capacity C7 of another termination other end.Switching power source chip IC2 8 pin, the 6th nonpolar electric capacity C6 it is another The one end at end, the 3rd Schottky diode D3 negative electrode and the second inductance L2 is connected.The second inductance L2 other end, the 6th electricity Hinder the R6 other end, the 7th polar capacitor Cp7 positive pole, the 8th polar capacitor Cp8 positive pole and the 9th polar capacitor Cp9 just Pole is grounded.2 pin, the tenth polar capacitor Cp10 negative pole of linear voltage regulator chip IC 3 are connected to the 8th resistance R8 other end.Line Property voltage regulator chip IC3 1 pin, the 9th resistance R9 one end are connected with the tenth resistance R10 one end.Linear voltage regulator chip IC3 3 pin, the 9th resistance R9 other end and the 11st polar capacitor Cp11 negative pole is connected to -12V output ends.Tenth polarity The positive pole of electric capacity Cp10 positive pole, the tenth resistance R10 other end and the 11st polar capacitor Cp11 is all grounded.Switching Power Supply core Piece IC2 uses Texas Instruments power supply chip TPS54360, and linear voltage regulator chip IC 3 is using Texas Instruments' power supply core Piece LM337.
As shown in figure 5 ,+6.5V output power supply circuits include switching power source chip IC4, the 8th nonpolar electric capacity C8, the 9th Nonpolar electric capacity C9, the tenth nonpolar electric capacity C10, the 11st nonpolar electric capacity C11, the 12nd nonpolar electric capacity C12, the 12nd Polar capacitor Cp12, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 4th Schottky diode D4 and Three inductance L3.
One termination of switching power source chip IC4 7 pin, the 8th nonpolar electric capacity C8 one end and the 9th nonpolar electric capacity C9 + 24 input voltage.Switching power source chip IC4 6 pin, 9 pin, the 8th nonpolar electric capacity the C8 other end, the 9th nonpolar electricity Hold the C9 other end, the 12nd polar capacitor Cp12 negative pole, the 12nd resistance R12 one end, the 11st nonpolar electric capacity C11 One end and the 12nd nonpolar electric capacity C12 one end be all grounded；Switching power source chip IC4 2 pin, 3 pin, 5 pin are all hanging.Open Powered-down source chip IC4 1 pin connects the tenth nonpolar electric capacity C10 one end.Switching power source chip IC4 8 pin, the tenth nonpolar electricity The other end, the 4th Schottky diode D4 negative electrode for holding C10 connect the 3rd inductance L3 one end, the 3rd inductance L3 other end, 11st resistance R11 one end, the 12nd polar capacitor Cp12 positive pole, the 11st nonpolar electric capacity C11 one end, the 12nd Nonpolar electric capacity C12 a 13rd resistance R13 of termination one end.The 13rd resistance R13 other end is used as voltage+6.5V's Output end.4th Schottky diode D4 plus earth.The 11st resistance R11 other end is another with the 12nd resistance R12's One end connects and connects switching power source chip IC4 4 pin.Switching power source chip IC4 uses the high stable of Texas Instruments, low temperature Float power supply chip TPS5430.
As shown in fig. 6 ,+5V output power supply circuits include linear voltage regulator chip IC 5, the 13rd polar capacitor Cp13, the Ten quadripolarity electric capacity Cp14, the 15th polar capacitor Cp15, the 16th polar capacitor Cp16.Switching power source chip IC5 3 pin, 13rd polar capacitor Cp13 positive pole and the tenth quadripolarity electric capacity Cp14 positive pole are connected to+6.5V output end.Switching Power Supply 2 pin, the 15th polar capacitor Cp15 positive pole and the 16th polar capacitor Cp16 positive pole of chip IC 5 are connected to+V5 output End, the 13rd polar capacitor Cp13 negative pole, the tenth quadripolarity electric capacity Cp14 negative pole, the 15th polar capacitor Cp15 it is negative Pole, the 16th polar capacitor Cp16 negative pole ground connection, switching power source chip IC5 1 pin ground connection.Linear voltage regulator chip IC 5 is adopted With the power supply chip LT1085 of Linear Tech.
As shown in fig. 7 ,+3.3V output power supply circuits include the polar capacitor Cp17 of linear voltage regulator chip IC the 6, the 17th, 18th polar capacitor C18, the 13rd nonpolar electric capacity C13, the 14th nonpolar electric capacity C14, the 14th resistance R14 and the tenth Five resistance R15 and the first light emitting diode.
3 pin, the 17th polar capacitor Cp17 positive pole and the 13rd nonpolar electric capacity C13 of linear voltage regulator chip IC 6 One termination power circuit+5V power output ends.1 pin of linear voltage regulator chip IC 6, the 17th polar capacitor Cp17 it is negative Pole and the 13rd nonpolar electric capacity the C13 other end are all grounded.2 pin, 4 pin, the tenth ends of the earth property electricity of linear voltage regulator chip IC 6 Positive pole, the 14th nonpolar electric capacity C14 one end and the 14th resistance R14 end for holding Cp18 are connected to together and by the tenth Five resistance R15 are connected to+3.3V reference voltage output ends.The another of 14th resistance R14 terminates to the first LED 1 Anode.The other end and the first LED 1 of 18th polar capacitor Cp18 negative pole, the tenth quadripolarity electric capacity C14 Negative electrode be all grounded.Linear voltage regulator chip IC 6 uses the power supply chip AMS117-3.3 of Texas Instruments.
As shown in figure 8 ,+4.5V reference voltage circuits include the first reference voltage chip IC 7, the first operational amplifier chip IC8, the 15th nonpolar electric capacity C15, the 16th nonpolar electric capacity C16, the 17th nonpolar electric capacity C17, the 18th is nonpolar Electric capacity C18, the 19th nonpolar electric capacity C19, the 16th resistance R4.
+ 5V the electricity of 2 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15 a termination power circuit Source output terminal, 4 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15 other end ground connection, the first benchmark electricity 5 pin of chip IC 7 are pressed to be grounded by the 16th nonpolar electric capacity C16,6 pin of the first reference voltage chip IC 7 and the 16th electricity Hinder R16 one end, the 17th nonpolar electric capacity C17 one end connection, the 17th nonpolar electric capacity C17 other end ground connection；The 3 pin of the 16 resistance R16 other end, a 18th nonpolar electric capacity C18 first operational amplifier chip IC8 of termination, the One operational amplifier chip IC8 2 pin ground connection；First operational amplifier chip IC8 5 pin and the 19th nonpolar electric capacity C19 One end connection be followed by the+5V power output ends of power circuit, the 19th nonpolar electric capacity C19 other end ground connection；First fortune Amplifier chip IC8 1 pin and the connection of 4 pin is calculated ,+4.5V reference voltage output ends, the 1 of the first reference voltage chip IC 7 is used as Pin, 3 pin, 7 pin, 8 foot stools are empty.First reference voltage chip IC 7 using Texas Instrument reference voltage chip REF5045, first Operational amplifier chip IC8 uses the accurate amplifier chip OPA376 of Texas Instrument.
As shown in figure 9 ,+2.5V reference voltage circuits include the second reference voltage chip IC 9, the second operational amplifier chip IC10, the 20th nonpolar electric capacity C20, the 21st nonpolar electric capacity C21, the 22nd nonpolar electric capacity C22, the 23rd Nonpolar electric capacity C23, the 24th nonpolar electric capacity C24 and the 17th resistance R17.
+ 5V the electricity of 2 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20 a termination power circuit Source output terminal, 4 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20 other end ground connection, the second benchmark electricity 5 pin of chip IC 9 are pressed to be grounded by the 21st nonpolar electric capacity C21,6 pin and the 17th of the second reference voltage chip IC 9 Resistance R17 one end, the 22nd nonpolar electric capacity C22 one end connection, the 22nd nonpolar electric capacity C22 another termination Ground；The 17th resistance R17 other end, the one of the 23rd nonpolar electric capacity C23 terminate the second operational amplifier chip IC6's 3 pin, the second operational amplifier chip I0 2 pin ground connection；Second operational amplifier chip IC10 5 pin and the 24th nonpolar Electric capacity C24 one end connection is followed by the+5V power output ends of power circuit, the 24th nonpolar electric capacity C24 another termination Ground；Second operational amplifier chip IC10 1 pin and the connection of 4 pin, are used as+4.5V reference voltage output ends, the first reference voltage 1 pin, 3 pin, 7 pin, 8 foot stools of chip IC 9 are empty.Second reference voltage chip IC 9 uses the reference voltage chip of Texas Instrument REF5025, the second operational amplifier chip IC10 use the accurate amplifier chip OPA376 of Texas Instrument.
As shown in Figure 10, signal conditioning circuit includes the 3rd operational amplifier chip IC11, the 25th nonpolar electric capacity C25, the 26th nonpolar electric capacity C26, the 27th nonpolar electric capacity C27, the 18th resistance R18, the 19th resistance R9, 20 resistance R20, the 21st resistance R21, the 22nd resistance R22.
18th resistance R18 one end, the 19th resistance R19 a 3rd operational amplifier chip IC11 of termination 3 pin. The 19th resistance R19 other end as sensor voltage output end.18th resistance R18 another termination voltage output electricity + 4.5V the reference voltage output ends on road.20th resistance R20 a 3rd operational amplifier chip IC11 of termination 3 pin, it is another End ground connection.3rd operational amplifier chip IC11 8 pin are connected with the 25th nonpolar electric capacity C25 one end and connect output + 5V the power output ends of power circuit.The 25th nonpolar electric capacity C25 other end and the 3rd operational amplifier chip IC11 4 pin ground connection.21st resistance R21 a 3rd operational amplifier chip IC11 of termination 1 pin, 2 pin.21st resistance The R21 other end and the 22nd resistance R22 one end, the 26th nonpolar electric capacity C26 one end are connected as low pass The input of filter circuit.The 22nd resistance R22 other end, the 27th nonpolar electric capacity C27 one end and the 3rd fortune Calculate amplifier chip IC11 5 pin connection, the 27th nonpolar electric capacity C27 other end ground connection.26th nonpolar electricity Hold the C26 operational amplifier chip IC11 of another termination the 3rd 6 pin and 7 pin and be used as output end.3rd operational amplifier core Piece IC11 uses the high-accuracy amplifier chip OPA2367 and OPA376 of Texas Instruments.
Sensor is output as analog voltage, and output voltage range is -5V to 5V.The modulus conversion chip that this circuit is selected can The analog-value range of measurement is 0 to 5V.Therefore need [- 5V, 5V] is converted into modulus conversion chip by linear circuit to survey Within [0,5V] for measuring scope.If output voltage signal is Vin, analog-digital converter input signal is Vo, if bias voltage is 5V, So design input and output between relation be：Vo=0.4*Vin+2.
As shown in figure 11, D/A converting circuit includes modulus conversion chip IC12, the 19th polar capacitor Cp19, the 20th Polar capacitor Cp20, the 21st polar capacitor Cp21, the 28th nonpolar electric capacity C28, the 29th nonpolar electric capacity C29, the 30th nonpolar electric capacity C30, the 31st nonpolar electric capacity C31, the 32nd nonpolar electric capacity C32, the 33rd Nonpolar electric capacity C33, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, the 26th resistance R26, the 27th resistance R27, the 28th resistance R28, the 29th resistance R29, the 30th resistance R30 and the first crystal oscillator Y1。
23rd resistance R23 one end, the 19th polar capacitor Cp19 positive pole, the 28th nonpolar electric capacity C28 One end, a 29th nonpolar electric capacity C29 termination modulus conversion chip IC12 4 pin, the 23rd resistance R23's is another + 2.5V the reference voltage output terminals of one termination power circuit, the 24th resistance R24 one end, the 19th polarity Cp19 it is negative Pole, the 28th nonpolar electric capacity C28 other end, the 29th nonpolar electric capacity C29 another termination modulus conversion chip IC12 3 pin, the 24th resistance R24 other end ground connection；Modulus conversion chip IC12 1 pin, the 20th polar capacitor + 5V the power output ends of Cp20 positive pole and the 30th nonpolar electric capacity C30 a termination power circuit, the 20th polar capacitor Cp20 negative pole and the 30th nonpolar electric capacity C30 other end ground connection；Modulus conversion chip IC13 7 pin, 8 pin, 9 pin, 10 Pin, 11 pin, the output end of 12 pin and signal conditioning circuit are connected；Modulus conversion chip IC12 5 pin pass through the 25th resistance + 2.5V reference voltage output terminals the connection of R25 and power circuit, modulus conversion chip IC12 2 pin ground connection；Modulus conversion chip IC12 14 pin, 15 pin, 16 pin, the 33rd nonpolar electric capacity C33 one end, the 21st polar capacitor Cp21 positive pole connects + 3.3V the power output ends of power circuit, modulus conversion chip IC13 17 pin, the 33rd nonpolar electric capacity C33 it is another End, the 21st polar capacitor Cp21 negative pole ground connection；First crystal oscillator Y1 one end and the one of the 31st nonpolar electric capacity C31 Terminate a termination of modulus conversion chip IC12 19 pin, the first crystal oscillator Y1 other end and the 32nd nonpolar electric capacity C32 Modulus conversion chip IC12 18 pin, the 31st nonpolar electric capacity C31 other end and the 32nd nonpolar electric capacity C32's The other end is grounded；A 26th resistance R26 termination modulus conversion chip IC12 24 pin, the one of the 27th resistance R27 Terminate modulus conversion chip IC12 23 pin, a 28th resistance R28 termination modulus conversion chip IC12 22 pin, second A 19 resistance R29 termination modulus conversion chip IC12 21 pin, a 30th resistance R30 termination modulus conversion chip IC13 20 pin, the 30th resistance R30 other end ground connection, modulus conversion chip IC13 6 pin, 13 pin, 25 pin, 26 pin, 27 Pin, 28 foot stools are empty；Modulus conversion chip IC13 uses 24 high precision analogue conversion chip ADS1256 of Texas Instruments.
As shown in figure 12, data transmission circuit includes multichannel RS232 line drivers/receiver IC13, the 34th Nonpolar electric capacity C34, the 35th nonpolar electric capacity C35, the 36th nonpolar electric capacity C36, the 37th nonpolar electric capacity C37, the 38th nonpolar electric capacity C38.
Multichannel RS232 line drivers/receiver IC13 1 pin and the 34th nonpolar electric capacity C34 one end connect Connect, 3 pin are connected with the 34th nonpolar electric capacity C34 other end, 4 pin and the 35th nonpolar electric capacity C35 one end connect Connect, 5 pin are connected with the 35th nonpolar electric capacity C35 other end, 15 pin are directly grounded, and 6 pin are nonpolar by the 36th Electric capacity C36 is grounded, and 2 pin are grounded by the 37th nonpolar electric capacity C37, and the one of 16 pin and the 38th nonpolar electric capacity C38 End connects and connects the output end of+3.3V output power supply circuits, the 38th nonpolar electric capacity C38 other end ground connection, multichannel RS232 line drivers/receiver IC13 11 pin, 12 pin, 13 pin, 14 foot stools are empty, multichannel RS232 line drivers/connect The PC_RXD1 ends of 7 pin and Serial Port Line of receiving device IC13 are connected, multichannel RS232 line drivers/receiver IC13 8 pin with The PC_TX1 ends of Serial Port Line are connected, and multichannel RS-232 line drivers/receiver IC13 uses the MAX3232 of Texas Instrument Chip.
As shown in figure 13, governor circuit includes main control chip IC14, the 39th nonpolar electric capacity C39, the 40th non-pole Property electric capacity C40, the 41st nonpolar electric capacity C41, the 42nd nonpolar electric capacity C42, the 43rd nonpolar electric capacity C43, 31st resistance R31, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the second crystal oscillator Y2, Three crystal oscillator Y3, button cell BT1, second switch K2 and LED 2.
39th nonpolar electric capacity C39 one end and a second crystal oscillator Y2 termination main control chip IC14 5 pin, the 4th Ten nonpolar electric capacity C40 one end and the second crystal oscillator Y2 another termination main control chip IC14 6 pin, the 39th nonpolar electricity Hold the C39 other end and the 40th nonpolar electric capacity C40 other end ground connection, a 32nd resistance R32 termination master control core Piece IC6 60 pin, other end ground connection；31st resistance R31 one end, the 41st nonpolar electric capacity C41 one end, second Switch a K2 termination main control chip IC14 7 the pin ,+3.3V power supplys of the 31st resistance R31 another termination power circuit Output end, the 41st nonpolar electric capacity C41 other end is grounded after being connected with the second switch K2 other end；Main control chip IC14 1 pin connects button cell BT1 positive pole, button cell BT1 negative pole ground connection, main control chip IC14 32 pin, 48 pin, 64 Pin, 19 pin, 13 pin all connect the+3.3V power output ends of power circuit, main control chip IC14 31 pin, 47 pin, 63 pin, 18 pin, 12 pin are all grounded；Main control chip IC14 30 pin light two by the 33rd resistance R33 sending and receiving optical diodes LED2 positive pole Pole pipe LED2 negative pole ground connection；42nd nonpolar electric capacity C42 one end, one end of the 34th resistance R34, the 3rd crystal oscillator A Y3 termination main control chip IC15 3 pin, the 43rd nonpolar electric capacity C43 one end, the 34th resistance R34 it is another End, the 3rd crystal oscillator Y3 another termination main control chip IC14 4 pin, the 42nd nonpolar electric capacity C42 other end and the 4th It is grounded after 13 nonpolar electric capacity C43 other end connection；Main control chip IC14 34 pin are connect the 20th in D/A converting circuit The six resistance R26 other end, 35 pin connect the other end of the 28th resistance R28 in D/A converting circuit, and 36 pin connect digital-to-analogue conversion The 27th resistance R27 other end in circuit, 38 pin connect the other end of the 29th resistance R29 in D/A converting circuit；It is main 20 pin, 21 pins, 22 pins, 23 pins of control chip IC 14 are respectively that On-Chip peripheral SPI1 NSS, SCLK, MISO, MOSI draw Pin output end, is connected with the spi bus of TF cards, main control chip IC14 15 pin and multichannel RS232 line drivers/receiver IC13 10 pin connection, main control chip IC14 16 pin are connected with multichannel RS232 line drivers/receiver IC13 9 pin； Main control chip IC14 uses the STM32F103RCT6 chips of ST Microelectronics.
Exported because the signal measured is changed into voltage signal by sensor, voltage range is between [- 5V, 5V], and city Modulus conversion chip input voltage range on face is [0,5V], therefore devises signal conditioning circuit and realize and export sensor Magnitude of voltage is converted into the acceptable magnitude of voltage of chip and carries out signal filtering.Main control unit passes through spi bus and analog-to-digital conversion core Piece communicates.Digital quantity is converted into analog quantity by main control unit, calculates corresponding three-component magnetic gradient value under these analog quantitys. On the one hand, real-time magnetic force Grad is stored in TF cards by main control unit.On the other hand, main control unit is actively by real-time Grad Sent to client and shown by serial ports.
Circuit involved by the utility model can be fitted into Airtight cabin, and sealed compartment can be mounted in the sub-aqua sport of no magnetic Carrier, can be mounted on unmanned plane, can also deliver into the observational network in seabed.The three-component magnetic in the measurable nearly magnetic field of circuit Power Grad, possibility is provided for the judgement of magnetic target, exploration mineral reserve, magnetic anomaly into figure.

Claims (1)

1. the measuring circuit of three-component magnetic gradiometer, including power circuit, collecting sensor signal circuit, data transmission circuit And governor circuit, wherein collecting sensor signal circuit include signal conditioning circuit and D/A converting circuit；
It is characterized in that：Described power circuit includes+13V output power supply circuits, -13V output power supply circuits ,+6.5V bufferings Potential circuit ,+3.3V output power supply circuits ,+5V output power supply circuits ,+4.5V output power supply circuits ,+2.5V reference voltages electricity Source circuit；Power circuit is responsible for providing positive and negative 13V power supplys powers to sensor, and passes through middle obtained+6.5V buffer voltagcs Circuit obtains ripple less 5V and 3.3V with linear power source circuit；Wherein 5V powers to high-precision adc, follow-up production Raw 4.5V provides high accuracy, the bias voltage of Low Drift Temperature for signal conditioning circuit；+ 2.5V reference voltages power circuit is modulus Conversion chip provides stable reference voltage；
+ 12V output power supply circuits include switching power source chip IC1, the first nonpolar electric capacity C1, the second nonpolar electric capacity C2, the Three nonpolar electric capacity C3, the 4th nonpolar electric capacity C4, the 5th nonpolar electric capacity C5, the first polar capacitor Cp1, the second polar capacitor Cp2, first resistor R1, second resistance R2,3rd resistor R3, the first Schottky diode D1, the first inductance L1, the first paster are opened Close K1 and the first connector P1；
Switching power source chip IC1 7 pin, the first nonpolar electric capacity C1 one end, the second nonpolar electric capacity C2 one end, the first pole Property electric capacity Cp1 positive pole and the first Schottky diode D1 negative electrode connect+24 input voltage；First Schottky diode D1's Anode and the first paster switch K1 one end are connected, and the first paster switch K1 other end and the first connector P1 1 pin connect Connect, the first connector P1 2 pin are connected and are grounded with the first polar capacitor Cp1 negative pole；Switching power source chip IC1 6 pin, 9 Pin, the first nonpolar electric capacity C1 other end, the second nonpolar electric capacity C2 other end, second resistance R2 one end, the second pole Property electric capacity Cp2 negative pole, the 4th nonpolar electric capacity C4 one end and the 5th nonpolar electric capacity C5 one end is all grounded；Switching Power Supply 2 pin of chip IC 1,3 pin, 5 pin are all hanging；Switching power source chip IC1 1 pin connects the 3rd nonpolar electric capacity C3 one end；Switch Power supply chip IC1 8 pin, the 3rd nonpolar electric capacity C3 other end, the second Schottky diode D2 negative electrode connect the first inductance L1 one end, it is the first inductance L1 other end, first resistor R1 one end, the second polar capacitor Cp2 positive pole, the 4th nonpolar One end of the electric capacity C4 other end, the 5th nonpolar electric capacity C5 another termination 3rd resistor R3；The 3rd resistor R3 other end It is used as voltage+12V output end；Second Schottky diode D2 plus earth；The first resistor R1 other end, second resistance The R2 other end connects and connects switching power source chip IC1 4 pin；Switching power source chip IC1 is steady using the height of Texas Instruments It is fixed, Low Drift Temperature power supply chip TPS5430；
- 12V output power supply circuits include switching power source chip IC2, linear voltage regulator chip IC 3, the 3rd polar capacitor Cp3, the Quadripolarity electric capacity Cp4, the 5th polar capacitor Cp5, the 6th polar capacitor Cp6, the 7th polar capacitor Cp7, the 8th polar capacitor Cp8, the 9th polar capacitor Cp9, the tenth polar capacitor Cp10, the 11st polar capacitor Cp11, the 6th nonpolar electric capacity C6, the 7th Nonpolar electric capacity C7, the 8th nonpolar electric capacity C8, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the The eight resistance inductance L2 of R8, the 9th resistance R9, the tenth resistance R10, second and the 3rd Schottky diode D3；
Switching power source chip IC2 2 pin, the 3rd polar capacitor Cp3 positive pole, quadripolarity electric capacity Cp4 positive pole, the 5th polarity Electric capacity Cp5 positive pole and the 6th polar capacitor Cp6 positive pole connect and connect+24V inputs, and the 3rd polar capacitor Cp3 negative pole connects Ground；Switching power source chip IC2 1 pin connects the 6th nonpolar electric capacity C6 one end；Switching power source chip IC2 3 pin are hanging；Switch Power supply chip IC2 4 pin connect the 4th resistance R4 one end；Quadripolarity electric capacity Cp4 negative pole, the 5th polar capacitor Cp5 it is negative It is pole and the 6th polar capacitor Cp6 negative pole, the 4th resistance R4 other end, switching power source chip IC2 7 pin and 9 pin, the 7th non- Polar capacitor C7 one end, the 8th nonpolar electric capacity C8 one end, the 3rd Schottky diode D3 anode, the 7th resistance R7 One end, the 7th polar capacitor Cp7 negative pole, the 8th polar capacitor Cp8 negative pole, the 9th polar capacitor Cp9 negative pole connect the 8th Resistance R8 one end；
Switching power source chip IC2 5 pin, the 7th resistance R7 other end and the 6th resistance R6 one end connects；Switching Power Supply core Piece IC2 6 pin, the 5th resistance R5 one end are connected with the 8th nonpolar electric capacity C8 other end；5th resistance R5's is another Terminate the 7th nonpolar electric capacity C7 other end；Switching power source chip IC2 8 pin, the 6th nonpolar electric capacity C6 other end, Three Schottky diode D3 negative electrode and the second inductance L2 one end are connected；The second inductance L2 other end, the 6th resistance R6 The other end, the 7th polar capacitor Cp7 positive pole, the 8th polar capacitor Cp8 positive pole and the 9th polar capacitor Cp9 positive pole connect Ground；2 pin, the tenth polar capacitor Cp10 negative pole of linear voltage regulator chip IC 3 are connected to the 8th resistance R8 other end；It is linear steady 1 pin of depressor chip IC 3, the 9th resistance R9 one end are connected with the tenth resistance R10 one end；Linear voltage regulator chip IC 3 3 pin, the 9th resistance R9 other end and the 11st polar capacitor Cp11 negative pole be connected to -12V output ends；Tenth polar capacitor The positive pole of Cp10 positive pole, the tenth resistance R10 other end and the 11st polar capacitor Cp11 is all grounded；Switching power source chip IC2 uses Texas Instruments power supply chip TPS54360, and linear voltage regulator chip IC 3 is using Texas Instruments' power supply chip LM337；
+ 6.5V output power supply circuits include switching power source chip IC4, the 8th nonpolar electric capacity C8, the 9th nonpolar electric capacity C9, the Ten nonpolar electric capacity C10, the 11st nonpolar electric capacity C11, the 12nd nonpolar electric capacity C12, the 12nd polar capacitor Cp12, 11 resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 4th Schottky diode D4 and the 3rd inductance L3；
One termination+24 of switching power source chip IC4 7 pin, the 8th nonpolar electric capacity C8 one end and the 9th nonpolar electric capacity C9 Input voltage；Switching power source chip IC4 6 pin, 9 pin, the 8th nonpolar electric capacity C8 other end, the 9th nonpolar electric capacity C9 The other end, the 12nd polar capacitor Cp12 negative pole, the 12nd resistance R12 one end, the one of the 11st nonpolar electric capacity C11 End and the 12nd nonpolar electric capacity C12 one end are all grounded；Switching power source chip IC4 2 pin, 3 pin, 5 pin are all hanging；Switch electricity Source chip IC4 1 pin connects the tenth nonpolar electric capacity C10 one end；Switching power source chip IC4 8 pin, the tenth nonpolar electric capacity The C10 other end, the 4th Schottky diode D4 negative electrode connect the 3rd inductance L3 one end, the 3rd inductance L3 other end, It is 11 resistance R11 one end, the 12nd polar capacitor Cp12 positive pole, the 11st nonpolar electric capacity C11 one end, the 12nd non- Polar capacitor C12 a 13rd resistance R13 of termination one end；The 13rd resistance R13 other end is used as the defeated of voltage+6.5V Go out end；4th Schottky diode D4 plus earth；The 11st resistance R11 other end is another with the 12nd resistance R12's End connects and connects switching power source chip IC4 4 pin；Switching power source chip IC4 uses the high stable of Texas Instruments, Low Drift Temperature Power supply chip TPS5430；
+ 5V output power supply circuits include linear voltage regulator chip IC 5, the 13rd polar capacitor Cp13, the tenth quadripolarity electric capacity Cp14, the 15th polar capacitor Cp15, the 16th polar capacitor Cp16；Switching power source chip IC5 3 pin, the 13rd polarity electricity The positive pole of the positive pole and the tenth quadripolarity electric capacity Cp14 that hold Cp13 is connected to+6.5V output end；Switching power source chip IC5 2 pin, 15th polar capacitor Cp15 positive pole and the 16th polar capacitor Cp16 positive pole are connected to+V5 output end, the 13rd polarity Electric capacity Cp13 negative pole, the tenth quadripolarity electric capacity Cp14 negative pole, the 15th polar capacitor Cp15 negative pole, the tenth sextupole electricity Hold Cp16 negative pole ground connection, switching power source chip IC5 1 pin ground connection；Linear voltage regulator chip IC 5 uses the power supply of Linear Tech Chip LT1085；
+ 3.3V output power supply circuits include the polar capacitor Cp17 of linear voltage regulator chip IC the 6, the 17th, the 18th polar capacitor C18, the 13rd nonpolar electric capacity C13, the 14th nonpolar electric capacity C14, the 14th resistance R14 and the 15th resistance R15 and One light emitting diode；
The one of 3 pin of linear voltage regulator chip IC 6, the 17th polar capacitor Cp17 positive pole and the 13rd nonpolar electric capacity C13 + 5V the power output ends of termination power circuit；1 pin of linear voltage regulator chip IC 6, the 17th polar capacitor Cp17 negative pole and The 13rd nonpolar electric capacity C13 other end is all grounded；2 pin, 4 pin, the 18th polar capacitor of linear voltage regulator chip IC 6 One end of Cp18 positive pole, the 14th nonpolar electric capacity C14 one end and the 14th resistance R14 is connected to together and by the 15th Resistance R15 is connected to+3.3V reference voltage output ends；14th resistance R14 another first LED 1 of terminating to Anode；18th polar capacitor Cp18 negative pole, the tenth quadripolarity electric capacity C14 other end and the first LED 1 Negative electrode is all grounded；Linear voltage regulator chip IC 6 uses the power supply chip AMS117-3.3 of Texas Instruments；
+ 4.5V reference voltage circuits include the first reference voltage chip IC 7, the first operational amplifier chip IC8, the 15th non-pole Property electric capacity C15, the 16th nonpolar electric capacity C16, the 17th nonpolar electric capacity C17, the 18th nonpolar electric capacity C18, the 19th Nonpolar electric capacity C19, the 16th resistance R4；
+ 5V the power supplys of 2 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15 a termination power circuit are defeated Go out the other end ground connection at end, 4 pin of the first reference voltage chip IC 7 and the 15th nonpolar electric capacity C15, the first reference voltage core Piece IC7 5 pin are grounded by the 16th nonpolar electric capacity C16,6 pin and the 16th resistance R16 of the first reference voltage chip IC 7 One end, the 17th nonpolar electric capacity C17 one end connection, the 17th nonpolar electric capacity C17 the other end ground connection；16th electricity Hinder the R16 other end, a 18th nonpolar electric capacity C18 first operational amplifier chip IC8 of termination 3 pin, the first computing Amplifier chip IC8 2 pin ground connection；One end of first operational amplifier chip IC8 5 pin and the 19th nonpolar electric capacity C19 Connection is followed by the+5V power output ends of power circuit, the 19th nonpolar electric capacity C19 other end ground connection；First operation amplifier 1 pin of device chip IC 8 and the connection of 4 pin, as+4.5V reference voltage output ends, 1 pin of the first reference voltage chip IC 7,3 pin, 7 pin, 8 foot stools are empty；First reference voltage chip IC 7 is using the reference voltage chip REF5045 of Texas Instrument, the first operation amplifier Device chip IC 8 uses the accurate amplifier chip OPA376 of Texas Instrument；
+ 2.5V reference voltage circuits include the second reference voltage chip IC 9, the second operational amplifier chip IC10, the 20th is non- Polar capacitor C20, the 21st nonpolar electric capacity C21, the 22nd nonpolar electric capacity C22, the 23rd nonpolar electric capacity C23, the 24th nonpolar electric capacity C24 and the 17th resistance R17；
+ 5V the power supplys of 2 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20 a termination power circuit are defeated Go out the other end ground connection at end, 4 pin of the second reference voltage chip IC 9 and the 20th nonpolar electric capacity C20, the second reference voltage core Piece IC9 5 pin are grounded by the 21st nonpolar electric capacity C21,6 pin and the 17th resistance of the second reference voltage chip IC 9 R17 one end, the 22nd nonpolar electric capacity C22 one end connection, the 22nd nonpolar electric capacity C22 other end ground connection； The 3 of the 17th resistance R17 other end, a 23rd nonpolar electric capacity C23 second operational amplifier chip IC6 of termination Pin, the second operational amplifier chip I0 2 pin ground connection；Second operational amplifier chip IC10 5 pin and the 24th nonpolar Electric capacity C24 one end connection is followed by the+5V power output ends of power circuit, the 24th nonpolar electric capacity C24 another termination Ground；Second operational amplifier chip IC10 1 pin and the connection of 4 pin, are used as+4.5V reference voltage output ends, the first reference voltage 1 pin, 3 pin, 7 pin, 8 foot stools of chip IC 9 are empty；Second reference voltage chip IC 9 uses the reference voltage chip of Texas Instrument REF5025, the second operational amplifier chip IC10 use the accurate amplifier chip OPA376 of Texas Instrument；
Signal conditioning circuit includes the 3rd operational amplifier chip IC11, the 25th nonpolar electric capacity C25, the 26th non-pole Property electric capacity C26, the 27th nonpolar electric capacity C27, the 18th resistance R18, the 19th resistance R9, the 20th resistance R20, second 11 resistance R21, the 22nd resistance R22；
18th resistance R18 one end, the 19th resistance R19 a 3rd operational amplifier chip IC11 of termination 3 pin；Tenth The nine resistance R19 other end as sensor voltage output end；18th resistance R18 another termination voltage follower circuit + 4.5V reference voltage output ends；20th resistance R20 a 3rd operational amplifier chip IC11 of termination 3 pin, another termination Ground；3rd operational amplifier chip IC11 8 pin are connected with the 25th nonpolar electric capacity C25 one end and connect out-put supply + 5V the power output ends of circuit；The 25th nonpolar electric capacity C25 other end and the 4 of the 3rd operational amplifier chip IC11 Pin is grounded；21st resistance R21 a 3rd operational amplifier chip IC11 of termination 1 pin, 2 pin；21st resistance R21 The other end and the 22nd resistance R22 one end, the 26th nonpolar electric capacity C26 one end be connected as LPF The input of circuit；The 22nd resistance R22 other end, the 27th nonpolar electric capacity C27 one end and the 3rd computing are put The 5 pin connection of big device chip IC 11, the 27th nonpolar electric capacity C27 other end ground connection；26th nonpolar electric capacity C26 The operational amplifier chip IC11 of another termination the 3rd 6 pin and 7 pin and be used as output end；3rd operational amplifier chip IC11 Using the high-accuracy amplifier chip OPA2367 and OPA376 of Texas Instruments；
D/A converting circuit includes modulus conversion chip IC12, the 19th polar capacitor Cp19, the 20th polar capacitor Cp20, the 21 polar capacitor Cp21, the 28th nonpolar electric capacity C28, the 29th nonpolar electric capacity C29, the 30th nonpolar electricity Hold C30, the 31st nonpolar electric capacity C31, the 32nd nonpolar electric capacity C32, the 33rd nonpolar electric capacity C33, second 13 resistance R23, the 24th resistance R24, the 25th resistance R25, the 26th resistance R26, the 27th resistance R27, 28th resistance R28, the 29th resistance R29, the 30th resistance R30 and the first crystal oscillator Y1；
23rd resistance R23 one end, the 19th polar capacitor Cp19 positive pole, the one of the 28th nonpolar electric capacity C28 End, a 29th nonpolar electric capacity C29 termination modulus conversion chip IC12 4 pin, the 23rd resistance R23 other end Connect+2.5V the reference voltage output terminals of power circuit, the 24th resistance R24 one end, the 19th polarity Cp19 negative pole, The 28 nonpolar electric capacity C28 other end, the 29th nonpolar electric capacity C29 another termination modulus conversion chip IC12 3 pin, the 24th resistance R24 other end ground connection；Modulus conversion chip IC12 1 pin, the 20th polar capacitor Cp20 are just + 5V the power output ends of pole and the 30th nonpolar electric capacity C30 a termination power circuit, the 20th polar capacitor Cp20's is negative Pole and the 30th nonpolar electric capacity C30 other end ground connection；Modulus conversion chip IC13 7 pin, 8 pin, 9 pin, 10 pin, 11 pin, The output end connection of 12 pin and signal conditioning circuit；Modulus conversion chip IC12 5 pin pass through the 25th resistance R25 and power supply + 2.5V reference voltage output terminals the connection of circuit, modulus conversion chip IC12 2 pin ground connection；The 14 of modulus conversion chip IC12 Pin, 15 pin, 16 pin, the 33rd nonpolar electric capacity C33 one end, the 21st polar capacitor Cp21 positive pole connect power circuit + 3.3V power output ends, modulus conversion chip IC13 17 pin, the 33rd nonpolar electric capacity C33 other end, the 20th One polar capacitor Cp21 negative pole ground connection；First crystal oscillator Y1 one end and a 31st nonpolar electric capacity C31 termination modulus Conversion chip IC12 19 pin, the first crystal oscillator Y1 other end and the 32nd nonpolar electric capacity C32 a termination analog-to-digital conversion 18 pin of chip IC 12, the 31st nonpolar electric capacity C31 other end and the 32nd nonpolar electric capacity C32 another termination Ground；A 26th resistance R26 termination modulus conversion chip IC12 24 pin, a 27th resistance R27 termination modulus Conversion chip IC12 23 pin, a 28th resistance R28 termination modulus conversion chip IC12 22 pin, the 29th resistance A R29 termination modulus conversion chip IC12 21 pin, the 20 of a 30th resistance R30 termination modulus conversion chip IC13 Pin, the 30th resistance R30 other end ground connection, modulus conversion chip IC13 6 pin, 13 pin, 25 pin, 26 pin, 27 pin, 28 foot stools It is empty；Modulus conversion chip IC13 uses 24 high precision analogue conversion chip ADS1256 of Texas Instruments；
Data transmission circuit includes multichannel RS232 line drivers/receiver IC13, the 34th nonpolar electric capacity C34, the 35 nonpolar electric capacity C35, the 36th nonpolar electric capacity C36, the 37th nonpolar electric capacity C37, the 38th non-pole Property electric capacity C38；
Multichannel RS232 line drivers/receiver IC13 1 pin is connected with the 34th nonpolar electric capacity C34 one end, and 3 Pin is connected with the 34th nonpolar electric capacity C34 other end, and 4 pin are connected with the 35th nonpolar electric capacity C35 one end, 5 Pin is connected with the 35th nonpolar electric capacity C35 other end, and 15 pin are directly grounded, and 6 pin pass through the 36th nonpolar electric capacity C36 is grounded, and 2 pin are grounded by the 37th nonpolar electric capacity C37, and 16 pin and the 38th nonpolar electric capacity C38 one end connect Connect and connect the output end of+3.3V output power supply circuits, the 38th nonpolar electric capacity C38 other end ground connection, multichannel RS232 Line driver/receiver IC13 11 pin, 12 pin, 13 pin, 14 foot stools are empty, multichannel RS232 line drivers/receiver IC13 7 pin and the PC_RXD1 ends of Serial Port Line are connected, multichannel RS232 line drivers/receiver IC13 8 pin and serial ports The PC_TX1 ends of line are connected, and multichannel RS-232 line drivers/receiver IC13 uses the MAX3232 cores of Texas Instrument Piece；
Governor circuit includes main control chip IC14, the 39th nonpolar electric capacity C39, the 40th nonpolar electric capacity C40, the 40th One nonpolar electric capacity C41, the 42nd nonpolar electric capacity C42, the 43rd nonpolar electric capacity C43, the 31st resistance R31, 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the second crystal oscillator Y2, the 3rd crystal oscillator Y3, button electricity Pond BT1, second switch K2 and LED 2；
39th nonpolar electric capacity C39 one end and a second crystal oscillator Y2 termination main control chip IC14 5 pin, the 40th is non- Polar capacitor C40 one end and the second crystal oscillator Y2 another termination main control chip IC14 6 pin, the 39th nonpolar electric capacity The C39 other end and the 40th nonpolar electric capacity C40 other end ground connection, a 32nd resistance R32 termination main control chip IC6 60 pin, other end ground connection；31st resistance R31 one end, the 41st nonpolar electric capacity C41 one end, second open A K2 termination main control chip IC14 7 pin are closed ,+3.3V the power supplys of the 31st resistance R31 another termination power circuit are defeated Go out end, the 41st nonpolar electric capacity C41 other end is grounded after being connected with the second switch K2 other end；Main control chip IC14 1 pin connect button cell BT1 positive pole, button cell BT1 negative pole ground connection, main control chip IC14 32 pin, 48 pin, 64 pin, 19 pin, 13 pin all connect the+3.3V power output ends of power circuit, main control chip IC14 31 pin, 47 pin, 63 pin, 18 pin, 12 pin All it is grounded；Main control chip IC14 30 pin pass through the 33rd resistance R33 sending and receiving optical diodes LED2 positive pole, light emitting diode LED2 negative pole ground connection；42nd nonpolar electric capacity C42 one end, one end of the 34th resistance R34, the 3rd crystal oscillator Y3 One termination main control chip IC15 3 pin, the 43rd nonpolar electric capacity C43 one end, the other end of the 34th resistance R34, 3rd crystal oscillator Y3 another termination main control chip IC14 4 pin, the 42nd nonpolar electric capacity C42 other end and the 43rd It is grounded after nonpolar electric capacity C43 other end connection；Main control chip IC14 34 pin connect the 26th electricity in D/A converting circuit The R26 other end is hindered, 35 pin connect the other end of the 28th resistance R28 in D/A converting circuit, and 36 pin connect D/A converting circuit In the 27th resistance R27 the other end, 38 pin connect the other end of the 29th resistance R29 in D/A converting circuit；Master control core Piece IC14 20 pin, 21 pins, 22 pins, 23 pins are respectively that On-Chip peripheral SPI1 NSS, SCLK, MISO, MOSI pin is defeated Go out end, be connected with the spi bus of TF cards, main control chip IC14 15 pin and multichannel RS232 line drivers/receiver IC13 The connection of 10 pin, main control chip IC14 16 pin are connected with multichannel RS232 line drivers/receiver IC13 9 pin；Master control Chip IC 14 uses the STM32F103RCT6 chips of ST Microelectronics.
CN201620849271.9U 2016-08-08 2016-08-08 The measuring circuit of three-component magnetic gradiometer Active CN206594280U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106093807A (en) * 2016-08-08 2016-11-09 杭州电子科技大学 A kind of measuring circuit of three-component magnetic gradiometer
CN111964672A (en) * 2020-08-08 2020-11-20 武汉利科夫科技有限公司 Inertia/geomagnetic combined navigation system low-noise measurement circuit based on three-axis TMR sensor
CN114563741A (en) * 2022-01-27 2022-05-31 西南民族大学 On-site correction method and device for magnetic gradiometer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106093807A (en) * 2016-08-08 2016-11-09 杭州电子科技大学 A kind of measuring circuit of three-component magnetic gradiometer
CN111964672A (en) * 2020-08-08 2020-11-20 武汉利科夫科技有限公司 Inertia/geomagnetic combined navigation system low-noise measurement circuit based on three-axis TMR sensor
CN114563741A (en) * 2022-01-27 2022-05-31 西南民族大学 On-site correction method and device for magnetic gradiometer

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