CN108388172A - A kind of multiplexed signal sampling and processing system with strong anti-interference ability - Google Patents

A kind of multiplexed signal sampling and processing system with strong anti-interference ability Download PDF

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Publication number
CN108388172A
CN108388172A CN201810138406.4A CN201810138406A CN108388172A CN 108388172 A CN108388172 A CN 108388172A CN 201810138406 A CN201810138406 A CN 201810138406A CN 108388172 A CN108388172 A CN 108388172A
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feet
chip
resistance
photoelectrical coupler
row
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邵红
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Qingdao Campus of Naval Aviation University of PLA
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Qingdao Campus of Naval Aviation University of PLA
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Priority to CN201810138406.4A priority Critical patent/CN108388172A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24215—Scada supervisory control and data acquisition

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The invention discloses a kind of multiplexed signal sampling and processing system with strong anti-interference ability, including MCU governor circuits, MCU governor circuits are connected with digital input circuit and interface and storage circuit, the MCU governor circuits include chip U15, the model STM32F103V of chip U15, digital signal input circuit includes photoelectrical coupler, and interface and storage circuit include blue tooth interface circuit, 485 bus interface circuits, CAN interface circuit, CH340 serial port drives and interface circuit.It has the following advantages：It is designed for more application scenarios, the input of digital analogue signal can be carried out by multichannel, interference of the high current for circuit system has been isolated, it realizes and does not interfere with each other mutually between input signal, possess multiple communication interfaces, innovative extends blue tooth interface, and numerous bus interface can adapt to different systems, and applicability is strong with scalability.

Description

A kind of multiplexed signal sampling and processing system with strong anti-interference ability
Technical field
It is specially a kind of with strong the present invention relates to multi-channel analog and digital Signal acquiring and processing, control output field The multiplexed signal sampling and processing system of anti-interference ability.
Background technology
With the development of information-intensive society, all there is the acquisition of faint analog signal and digital signal in numerous application scenarios With the demand for being shown and being wirelessly transferred after processing.In major applications scene, the signal of signal acquisition process completion It is all transmitted by data line, however signal acquisition line numerous under many scenes, power cord are distributed in work In region, it is not only possible to which the line for bringing interference to signal transmission, and being scattered underfoot will also become unsafe factor, cause It is inconvenient and cause danger, cause current signal acquiring system to have the following disadvantages：
1, application scenarios are few, the input of single channel digital analogue signal, are unable to input signal and carry out many algorithms processing；
2, the input of digital analogue signal interferes with each other, poor anti jamming capability；
3, communication interface is single, without function of Bluetooth communication, can not adapt to different systems, applicability and poor expandability.
Invention content
The problem to be solved in the present invention is provided a kind of multiple signals with strong anti-interference ability and adopts for above insufficient Collection and processing system, are designed for more application scenarios, and the input of digital analogue signal can be carried out by multichannel, have been isolated big Interference of the electric current for circuit system realizes and does not interfere with each other mutually between input signal, possess multiple communication interfaces, innovative Blue tooth interface is extended, numerous bus interface can adapt to different systems, and applicability is strong with scalability.
To solve the above-mentioned problems, the present invention uses following technical scheme
A kind of multiplexed signal sampling and processing system with strong anti-interference ability, including MCU governor circuits, MCU governor circuits It is connected with digital input circuit and interface and storage circuit, the MCU governor circuits include chip U15, the model of chip U15 STM32F103V, digital signal input circuit include photoelectrical coupler, and interface and storage circuit include blue tooth interface circuit, 485 Bus interface circuit, CAN interface circuit, CH340 serial port drives and interface circuit.
Further, 12 feet of the chip U15 are connected with the one end crystal oscillator X4 and the one end capacitance C36,13 feet of chip U15 It is connected with the crystal oscillator X4 other ends and the one end capacitance C37, the capacitance C36 other ends, capacitance C37 other ends ground connection, 9 feet of chip U15 It is connected with the one end crystal oscillator X6 and the one end capacitance C38,8 feet of chip U15 are connected with the crystal oscillator X6 other ends and the capacitance C39 other ends, The capacitance C38 other ends, capacitance C39 other ends ground connection；
6 feet of the chip U15 are connected with the one end diode D16 and the one end diode D15, the connection of the diode D16 other ends 3.3V power supply VCC33, the diode D15 other ends are connected with one end of lithium battery BAT1, the other end ground connection of lithium battery BAT1；
76 feet of the chip U15 are connected with 1 foot of row's seat P3, and 72 feet of chip U15 are connected with row's seat P3 2 feet, the 3 feet ground connection of row seat P3；
94 feet of the chip U15 are connected with 2 feet of ship type switch K8, and 3 feet of ship type switch K8 connect 3.3V power supply VCC33, 1 foot of ship type switch K8 is grounded；
37 feet of the chip U15 are connected with the one end resistance R39, resistance R39 other ends ground connection；
14 feet of the chip U15 are connected with the one end resistance R66, the one end key switch K7, the one end capacitance C40, the one end resistance R66 Connect 3.3V power supply VCC33, capacitance the C40 other end, key switch K7 other ends ground connection；
97 feet of the chip U15 are connected with the one end diode D20, and the diode D20 other ends are connected with the one end resistance R42, electricity Hinder R42 other ends connection 3.3V power supplys VCC33；98 feet of chip U15 are connected with the one end diode D23, the diode D23 other ends It is connected with the one end resistance R43, the resistance R43 other ends connect 3.3V power supplys VCC33；1 foot of chip U15 is connected with diode D27 One end, the diode D27 other ends are connected with the one end resistance R44, and the resistance R44 other ends connect 3.3V power supplys VCC33.
Further, the digital signal input circuit includes photoelectrical coupler U2, and 1 foot of photoelectrical coupler U2 is connected with 2 feet of the one end resistance R6, another termination outside 24V power vd D24_OUT, photoelectrical coupler U2 of resistance R6 are connected with exclusion RP1 1 foot, the 3 feet ground connection of photoelectrical coupler U2,4 feet of photoelectrical coupler U2 are connected with one end of diode D1, diode D1's The other end is connected with the one end resistance R7, and the resistance R7 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes light 1 foot of electric coupler U4, photoelectrical coupler U4 are connected with the one end resistance R8, another termination outside 24V power vds D24_ of resistance R8 2 feet of OUT, photoelectrical coupler U4 are connected with 2 feet of exclusion RP1, and 3 feet of photoelectrical coupler U2 are grounded, and the 4 of photoelectrical coupler U4 Foot is connected with one end of diode D2, and the other end of diode D2 is connected with the one end resistance R9, and the resistance R9 other ends connect 3.3V Power supply VCC33；Digital signal input circuit further includes photoelectrical coupler U5, and 1 foot of photoelectrical coupler U5 is connected with resistance R11 mono- 2 feet at end, another termination outside 24V power vd D24_OUT, photoelectrical coupler U5 of resistance R11 are connected with 3 feet of exclusion RP1, light 3 feet of electric coupler U5 are grounded, and 4 feet of photoelectrical coupler U5 are connected with one end of diode D7, and the other end of diode D7 connects It is connected to the one end resistance R12, the resistance R12 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectric coupling 1 foot of device U6, photoelectrical coupler U6 are connected with the one end resistance R13,24V power vd D24_OUT outside another terminations of resistance R13, 2 feet of photoelectrical coupler U6 are connected with 4 feet of exclusion RP1, the 3 feet ground connection of photoelectrical coupler U6, and 4 feet of photoelectrical coupler U6 connect It is connected to one end of diode D8, the other end of diode D8 is connected with the one end resistance R14, and the resistance R14 other ends connect 3.3V electricity The 5-8 feet access of source VCC33, exclusion RP1 have external 24V power vds D24_OUT.
Further, the digital signal input circuit further includes photoelectrical coupler U7, the 1 foot connection of photoelectrical coupler U7 There are the one end resistance R15,2 feet of another termination outside 24V power vd D24_OUT, photoelectrical coupler U7 of resistance R15 to be connected with exclusion 8 feet of RP5, the 3 feet ground connection of photoelectrical coupler U7,4 feet of photoelectrical coupler U7 are connected with one end of diode D9, diode D9 The other end be connected with the one end resistance R16, the resistance R16 other ends connect 3.3V power supplys VCC33；Digital signal input circuit also wraps Photoelectrical coupler U8 is included, 1 foot of photoelectrical coupler U8 is connected with the one end resistance R19, another termination outside 24V power supplys of resistance R19 2 feet of VDD24_OUT, photoelectrical coupler U8 are connected with 7 feet of exclusion RP5, the 3 feet ground connection of photoelectrical coupler U8, photoelectric coupling 4 feet of device U8 are connected with one end of diode D10, and the other end of diode D10 is connected with the one end resistance R20, and resistance R20 is another End connection 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler U9, the 1 foot connection of photoelectrical coupler U9 There are the one end resistance R21,2 feet of another termination outside 24V power vd D24_OUT, photoelectrical coupler U9 of resistance R21 to be connected with exclusion 6 feet of RP5, the 3 feet ground connection of photoelectrical coupler U9,4 feet of photoelectrical coupler U9 are connected with one end of diode D13, diode The other end of D13 is connected with the one end resistance R22, and the resistance R22 other ends connect 3.3V power supplys VCC33；Digital signal input circuit Further include photoelectrical coupler U10,1 foot of photoelectrical coupler U10 is connected with the one end resistance R23, outside another terminations of resistance R23 2 feet of 24V power vd D24_OUT, photoelectrical coupler U10 are connected with 5 feet of exclusion RP5, and 3 feet of photoelectrical coupler U10 are grounded, 4 feet of photoelectrical coupler U10 are connected with one end of diode D14, and the other end of diode D14 is connected with the one end resistance R24, electricity The 1-4 feet access of the resistance R24 other ends connection 3.3V power supply VCC33, exclusion RP5 have external 24V power vds D24_OUT.
Further, the digital signal input circuit further includes row needle P4, and 1 foot of row's needle P4 is connected with photoelectrical coupler 2 feet of U2,2 feet of the 2 feet connection photoelectrical coupler U4 of row's needle P4,3 feet of row's needle P4 are connected with 2 feet of photoelectrical coupler U5, 4 feet of row's needle P4 are connected with 2 feet of photoelectrical coupler U6, and 5 feet of row's needle P4 are connected with 2 feet of photoelectrical coupler U7, row's needle P4 6 feet be connected with 2 feet of photoelectrical coupler U8,7 feet of row's needle P4 are connected with 2 feet of photoelectrical coupler U9, and 8 feet of row's needle P4 connect 2 feet of photoelectrical coupler U10 are connected to, 9 feet of row's needle P4 meet GND_OUT, and 10 feet of row's needle P4 meet external 24V power vds D24_ OUT；
4 feet of the photoelectrical coupler U2 are connected with 39 feet of chip U15, and 4 feet of photoelectrical coupler U4 are connected with chip U15's 4 feet of 40 feet, photoelectrical coupler U5 are connected with 41 feet of chip U15, and 4 feet of photoelectrical coupler U6 are connected with the 42 of chip U15 4 feet of foot, photoelectrical coupler U7 are connected with 43 feet of chip U15, and 4 feet of photoelectrical coupler U8 are connected with 44 feet of chip U15, 4 feet of photoelectrical coupler U9 are connected with 45 feet of chip U15, and 4 feet of photoelectrical coupler U10 are connected with 46 feet of chip U15.
Further, the blue tooth interface circuit includes row needle X8, arranges the external bluetooths of needle X8, and the 1 foot connection of row's needle X8 is blue The BLE_STATE feet of tooth, the BLE_RXD feet of the 1 foot connection bluetooth of row's needle X8, the BLE_TXD of the 1 foot connection bluetooth of row's needle X8 Foot, the BLE_EN feet of the 1 foot connection bluetooth of row's needle X8,1 foot of row's needle X8 are connected with the one end resistance R35, the resistance R35 other ends It is connected with the one end light emitting diode D26,2 feet of another termination power GND5 of light emitting diode D26, row's needle X8 are connected with chip 3 feet of 78 feet of U15, row's needle X8 are connected with 79 feet of chip U15, the 4 feet ground connection of row's needle X8, the 5 feet connection 5V electricity of row's needle X8 Source VDD50.
Further, 485 bus interface circuit includes chip U17, the model 7L184 of chip U17, chip U17 1 foot be connected with 26 feet of chip U15,2 feet and 3 feet of chip U17 are connected with 23 feet of chip U15, and 4 feet of chip U17 connect 25 feet of chip U15 are connected to, 5 feet of chip U17 connect power supply GND5, and 6 feet of chip U17 are connected with the one end resistance R61 and connect 1 foot of plug-in unit J3, the resistance R61 other ends are connected with 6 feet of chip U17 and 2 feet of connector J3.
Further, the CAN interface circuit includes chip U16, the model TJZ1050 of chip U16, chip 1 foot of U16 is connected with 96 feet of chip U15, and 4 feet of chip U16 are connected with 95 feet of chip U15, the 2 feet connection of chip U16 There is the one end capacitance C53, and access power supply GND5,3 feet of chip U16 are connected with the capacitance C53 other ends, and access 5V power supplys 7 feet of VDD50, chip U16 are connected with the one end resistance R60 and 1 foot of connector J1, and the resistance R60 other ends connect chip U16's 2 feet of 6 feet and connector J1.
Further, the CH340 serial port drives and interface circuit include chip U14, row's needle X7, row needle X9, chip U14 Model CH340G-SOP16,1 foot of chip U14 connects power supply GND5, and 2 feet of chip U14 are connected with the one of diode D19 End, the other end of diode D19 are connected with 69 feet of chip U15, and 3 feet of chip U14 are connected with one end of resistance R30, two poles The other end of pipe R30 is connected with 68 feet of chip U15,5 feet of 4 feet connection 3.3V the power supply VCC33, chip U14 of chip U14 3 feet of connection row's needle X9,2 feet of 6 feet connection row's needle X9 of chip U14,7 feet of chip U14 are connected with the one end capacitance C20 and crystalline substance Shake one end of OSC1, and capacitance C20 other ends ground connection, 8 feet of chip U14 are connected with the other end and capacitance C21 mono- of crystal oscillator OSC1 End, capacitance C21 other ends ground connection, 16 feet of chip U14 are connected with the one end capacitance C13, and access 3.3V power supply VCC33, capacitance The C13 other ends are grounded；
1 foot of row's needle X9 is connected with 1 foot of row's needle X7, and 2 feet of row's needle X9 are connected with 2 feet of row's needle X7,3 feet of row's needle X9 5 feet of 3 feet of the row of being connected with needle X7, row's needle X9 are connected with 5 feet of row's needle X7, and access power supply GND5, the 1 foot connection of row's needle X7 There are the one end resistance R25, the resistance R25 other ends to access 5V power vds D50；
Further, the EEPROM storage circuits include chip U19, the model ATMEL11124c02 of chip U19, chip - 4 foot of 1 foot of U19 accesses power supply GND5, and 7 feet of 8 feet connection 3.3V the power supply VCC33, chip U19 of chip U19 are connected with capacitance The one end C54, and power supply GND5 is accessed, 6 feet of the capacitance C54 other ends access 3.3V power supply VCC33, chip U19 are connected with exclusion 5 feet of 2 feet of RP2 and 92 feet of chip U15, chip U19 are connected with 1 foot of exclusion RP2 and 93 feet of chip U15, exclusion RP2 5-8 feet connection 3.3V power supplys VCC33；
The serial flash storage circuits include chip U18, and 1 foot of chip U18 is connected with the one end resistance R62 and chip U15 2 feet of 29 feet, the resistance R62 other ends access 3.3V power supply VCC33, chip U18 are connected with 31 feet of chip U15, chip U18's 5 feet are connected with 32 feet of chip U15, and 6 feet of chip U18 are connected with 30 feet of chip U15, and 3 feet, 7 feet, 8 feet of chip U18 connect Enter 3.3V power supply VCC33, the 4 of chip U18 is connected with power supply GND5.
Multiplexed signal sampling and processing system of the present invention with strong anti-interference ability have below beneficial to effect Fruit：
1.MCU provides on-line debugging function, and highest 72MHz working frequencies are reachable when 0 latent period of memory accesses 1.25DMips/MHZ, the FLASH program memory with 16K to 512K bytes is low in energy consumption, has the function of double sampled and keeps, 2 A 12 analog-digital converters, 1us conversion times, up to 9 communication interfaces, are widely used；
2. being designed for more application scenarios, digital signal input can carry out the input of digital analogue signal, energy by multichannel It is enough that many algorithms processing is carried out to input signal, it realizes the real-time response of multiple signals, meets multichannel in numerous application scenarios Signal acquiring and processing demand；
3. digital signal input is isolated using optocoupler, 8 road signals correspond to 8 optocouplers and are controlled respectively per road signal, isolation Interference of the high current for circuit system is realized and is not interfere with each other mutually between input signal；
4. possessing multiple communication interfaces, innovative extends blue tooth interface, can convert the digital and analog signaling of reading The electronic equipment for being equipped with function of Bluetooth communication with other for wireless signal is communicated, and numerous bus interface can adapt to not Same system, applicability are strong with scalability.
The invention will be further described with reference to the accompanying drawings and examples.
Description of the drawings
Fig. 1 is the block diagram of multiplexed signal sampling and processing circuit with strong anti-interference ability in the embodiment of the present invention；
Fig. 2 is AD Acquisition Circuit schematic diagram in the embodiment of the present invention；
Fig. 3 is LCD display circuit schematic diagram in the embodiment of the present invention；
Fig. 4 is that key control and LED circuit schematic diagram are pressed in the embodiment of the present invention；
Fig. 5 is key circuit schematic diagram in the embodiment of the present invention；
Fig. 6 is digital pipe display circuit schematic diagram in the embodiment of the present invention；
Fig. 7 is external input power circuit diagram in the embodiment of the present invention；
Fig. 8 is analog power circuit diagram in the embodiment of the present invention；
Fig. 9 is digital power circuit schematic diagram in the embodiment of the present invention；
Figure 10 is button display panel circuit diagram in the embodiment of the present invention；
Figure 11 is digital signal input circuit schematic diagram in the embodiment of the present invention；
Figure 12 is that digital signal exports repeat circuit output circuit schematic diagram in the embodiment of the present invention；
Figure 13 is middle or long line drive circuit schematic diagram of the embodiment of the present invention；
Figure 14 is MCU and its peripheral tandem circuit schematic diagram in the embodiment of the present invention；
Figure 15 is blue tooth interface circuit diagram in the embodiment of the present invention；
Figure 16 is 485 bus interface circuit schematic diagrams in the embodiment of the present invention；
Figure 17 is CAN interface circuit diagram in the embodiment of the present invention；
Figure 18 is CH340 serial port drives and interface circuit schematic diagram in the embodiment of the present invention；
Figure 19 is EEPROM storage circuit schematic diagrams in the embodiment of the present invention；
Figure 20 is serial flash storage circuit schematic diagrams in the embodiment of the present invention；
Figure 21 is buzzer alarm circuit schematic diagram in the embodiment of the present invention.
Specific implementation mode
Embodiment 1, as shown in Fig. 1 to Figure 21, a kind of multiplexed signal sampling and processing system with strong anti-interference ability, Including MCU governor circuits and system power supply circuit, it is defeated that MCU governor circuits are connected with AD Acquisition Circuit, digital input circuit, number Go out that circuit, buzzer alarm circuit, LCD are shown and key control circuit and interface and storage circuit, system power supply circuit are each Modular circuit is powered.
The MCU governor circuits include chip U15, and 12 feet of the model STM32F103V of chip U15, chip U15 connect It is connected to the one end crystal oscillator X4 and the one end capacitance C36,13 feet of chip U15 are connected with the crystal oscillator X4 other ends and the one end capacitance C37, capacitance The C36 other ends, capacitance C37 other ends ground connection, 9 feet of chip U15 are connected with the one end crystal oscillator X6 and the one end capacitance C38, chip U15 8 feet be connected with the crystal oscillator X6 other ends and the capacitance C39 other ends, the capacitance C38 other ends, capacitance C39 other ends ground connection.
6 feet of the chip U15 are connected with the one end diode D16 and the one end diode D15, and the diode D16 other ends connect 3.3V power supply VCC33 are met, the diode D15 other ends are connected with one end of lithium battery BAT1, the other end ground connection of lithium battery BAT1.
76 feet of the chip U15 are connected with 1 foot of row's seat P3, and 72 feet of chip U15 are connected with row 2 feet of seat P3, the 3 feet ground connection of row's seat P3.
94 feet of the chip U15 are connected with 2 feet of ship type switch K8, and 3 feet of ship type switch K8 connect 3.3V power supplys 1 foot of VCC33, ship type switch K8 are grounded.
37 feet of the chip U15 are connected with the one end resistance R39, resistance R39 other ends ground connection.
14 feet of the chip U15 are connected with the one end resistance R66, the one end key switch K7, the one end capacitance C40, resistance R66 One end connects 3.3V power supply VCC33, capacitance the C40 other end, key switch K7 other ends ground connection.
97 feet of the chip U15 are connected with the one end diode D20, and the diode D20 other ends are connected with resistance R42 mono- End, the resistance R42 other ends connect 3.3V power supplys VCC33；98 feet of chip U15 are connected with the one end diode D23, diode D23 The other end is connected with the one end resistance R43, and the resistance R43 other ends connect 3.3V power supplys VCC33；1 foot of chip U15 is connected with two poles The one end pipe D27, the diode D27 other ends are connected with the one end resistance R44, and the resistance R44 other ends connect 3.3V power supplys VCC33.
The peripheries MCU tandem circuit, BOOT1 are grounded after concatenating a 10K resistance R39, and BOOT1 pins are the low electricity of fixed level It is flat.BOOT0 pins and 3.3V power supplys VCC33 concatenate a 10K resistance and ground is connected to three pins that a ship type switchs, by The level height of ship type switch selection BOOT0, when BOOT0 is connect with GND5, BOOT0 is low level, is started from user's flash memory, For normal startup mode.When BOOT0 is connected by resistance R38 with VCC33, BOOT0 is high level, is opened from system storage It is dynamic.
The peripheries MCU tandem circuit, BOOT1 are grounded after concatenating a 10K resistance R39, and BOOT1 pins are the low electricity of fixed level It is flat.BOOT0 pins and 3.3V power supplys VCC33 concatenate a 10K resistance and ground is connected to three pins that a ship type switchs, by The level height of ship type switch selection BOOT0, when BOOT0 is connect with GND5, BOOT0 is low level, is started from user's flash memory, For normal startup mode, when BOOT0 is connected by resistance R38 with VCC33, BOOT0 is high level, is opened from system storage It is dynamic.
Stand-by power supply circuit, lithium battery or button cell one end ground connection, the other end pass through diode a D15 and VBAT It is connected to MCU and power supply is provided, VCC33 is connected to VBAT by diode D16.Reset circuit, nRST pins connect pull-up resistor It is connected to the voltage VCC33 of 3.3V.One end is connected to nRST pins, other end ground connection, when reset is pressed after capacitance C40 and button parallel connection When key K7 is not pressed, nRST pins are connected to high level by pull-up resistor, and when by key pressing, nRST is connected to GND5, The level of nRST pins is pulled low.Indicator light circuit is debugged, there are three debugging indicator lights to be used for facilitating being debugged altogether for this system. The PE0-PE2 pins drawn from MCU concatenate D20, R42, D23, R43 respectively, and D27, R44 are connected to system power supply VCC33, with the For debugging indicator light all the way, when PE0 is low level, electric current flows through resistance R42 and D20 from VC33, and D20 conductings are lighted. Line debugging interface circuit diagram, a port drawn from MCU（SWCLK, SWDIO pin）On-line debugging function is provided, The row of being connected to seat P3 is conveniently attached.
MCU governor circuits provide on-line debugging function, and highest 72MHz working frequencies are visited in 0 latent period of memory Up to 1.25DMips/MHZ when asking, the FLASH program memory with 16K to 512K bytes is low in energy consumption, have it is double sampled with Function is kept, 2 12 analog-digital converters, 1us conversion times, up to 9 communication interfaces are widely used.
The AD Acquisition Circuit includes chip U01, and 1 foot of the model CS5532/34 of chip U01, chip U01 are connected with The one end capacitance C01, the one end capacitance C02, the one end resistance R01, capacitance C01 another termination simulation ground AGND, the resistance R01 other ends connect 2 feet of 3 feet of the row of being connected to needle X03, chip U01 are connected with the one end capacitance C04, the capacitance C02 other ends, the one end resistance R04, capacitance C04 another termination simulation ground AGND, the resistance R04 other ends are connected with 4 feet of row's needle X03；24 feet of chip U1 are connected with capacitance The one end C08, the one end capacitance C09, the one end resistance R05, capacitance C08 another termination simulation ground AGND, the resistance R05 other ends are connected with 5 feet of needle X03 are arranged, 23 feet of chip U01 are connected with the one end capacitance C010, the capacitance C09 other ends, the one end resistance R06, capacitance C010 another termination simulation ground AGND, the resistance R06 other ends are connected with 6 feet of row's needle X03；22 feet of chip U01 are connected with electricity Hold the one end C013, the one end capacitance C014, the one end resistance R07, capacitance C013 another termination simulation ground AGND, the resistance R07 other ends 21 feet of 9 feet of the row of being connected with needle X03, chip U01 are connected with the one end capacitance C015, the capacitance C014 other ends, resistance R08 mono- End, capacitance C015 another termination simulation ground AGND, the resistance R08 other ends are connected with 10 feet of row's needle X03；3 feet of chip U01 connect It is connected to the one end capacitance C016, the one end capacitance C017, the one end resistance R09, another termination simulations of capacitance C016 ground AGND, resistance R09 The other end is connected with 7 feet of row's needle X03, and 4 feet of chip U01 are connected with the one end capacitance C018, the capacitance C017 other ends, resistance The one end R010, capacitance C018 another termination simulation ground AGND, the resistance R010 other ends are connected with 4 feet of row's needle X03.
8 feet of the chip U01 are connected with the one end resistance R011, and meet simulation ground AGND, and 18 feet of chip U01 are connected with The resistance R011 other ends, and meet power supply GND5；11 feet of chip U01 are connected with the one end crystal oscillator X02, the connection of the crystal oscillator X02 other ends 12 feet of chip U01；5 feet of chip U01 are connected with the one end capacitance C012 and the one end capacitance C011, the 6 feet connection electricity of chip U01 Hold the C012 other ends and the capacitance C011 other ends；19 feet of chip U01 are connected with the one end capacitance C07, the one end capacitance C06, and connect Enter simulation ground AGND, 20 feet that the capacitance C07 other ends, the capacitance C06 other ends connect 5V analog power AVDD50, chip U01 connect 5V analog power AVDD50 are met, 7 feet of chip U01 are connected with the one end resistance R03, and connect 5V analog power AVDD50, chip 17 feet of U01 are connected with the resistance R03 other ends, the one end capacitance C05, the one end resistance R02, the one end capacitance C03, and capacitance C05 is another End, the capacitance C03 other ends connect power supply GND5, and the resistance R02 other ends connect 3.3V power supplys VCC33.
16 feet of the chip U01 are connected with 2 feet of row's needle X01, and 15 feet of chip U01 are connected with 3 feet of row's needle X01, 14 feet of chip U01 are connected with 4 feet of row's needle X01, and 13 feet of chip U01 are connected with 5 feet of row's needle X01.
The AD Acquisition Circuit shares 4 road differential signal access CS5532AD acquisition chips, and four road differential signals are using same The structure of sample accesses.By taking first via differential signal input channel as an example, C01 is in parallel with C02 after connecting with C04, and in parallel two End is connected respectively to the IN1+ and IN1- of CS5532 the two pins, and the both ends that R01 and R04 are connected to C2 can be respectively connected to two The connecting pin access simulation ground of road analog signal, C01 and C04, other three-pass DINSAR signal input channels are using same electricity Line structure accesses.It is connected on two pins of C01 and C02 of CS5532 after C011 and C012 is in parallel, the both ends connection of crystal oscillator X02 OSC1 and two pins of OSC2, the one end on reference voltage VA- connections simulation ground and R011, the ends the DGND connection R011's of CS5532 Other end, and be digitally connected.The ends VREF- and VREF+ of CS5532 are connected in after C06 and C07 is in parallel respectively, simultaneously The VREF- pins of CS5532 are connected to simulation, the AVDD50 pins of 5V are connected to VREF+ and VA+, and resistance R03 is connected to VA+ With the both ends VD+, one end is grounded after C05 is in parallel with C03, and the other end is connected in VD+, and one end of R02 connects 3.3V power supplys, the other end It is connected on VD+.The spi bus interface of software simulation（/C/S、SDI、SDO、SCLK）The PC0-AD10 of the row's of being connected respectively to needle, PC1- AD11, PC2-AD12, PC3-AD13 pin connect to be plugged on master control borad with MCU.
The noise of the AD Acquisition Circuit is extremely low, channel is more, shares 4 road differential signals access AD Acquisition Circuits, and four tunnels are poor Sub-signal using same structure access, can obtain up to 24 respectively rate output as a result, have self correcting system, can carry out Self calibration and system calibration eliminate zero gain and drift error, and easily with MCU interfaces, precision is high, high resolution.
The digital signal input circuit includes photoelectrical coupler U2, and 1 foot of photoelectrical coupler U2 is connected with resistance R6 mono- 2 feet at end, another termination outside 24V power vd D24_OUT, photoelectrical coupler U2 of resistance R6 are connected with 1 foot of exclusion RP1, light 3 feet of electric coupler U2 are grounded, and 4 feet of photoelectrical coupler U2 are connected with one end of diode D1, and the other end of diode D1 connects It is connected to the one end resistance R7, the resistance R7 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler 1 foot of U4, photoelectrical coupler U4 are connected with the one end resistance R8, another termination outside 24V power vd D24_OUT of resistance R8, photoelectricity 2 feet of coupler U4 are connected with 2 feet of exclusion RP1, the 3 feet ground connection of photoelectrical coupler U2, and 4 feet of photoelectrical coupler U4 are connected with The other end of one end of diode D2, diode D2 is connected with the one end resistance R9, and the resistance R9 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler U5, and 1 foot of photoelectrical coupler U5 is connected with the one end resistance R11, 2 feet of 24V power vd D24_OUT, photoelectrical coupler U5 are connected with 3 feet of exclusion RP1, photoelectricity outside another terminations of resistance R11 3 feet of coupler U5 are grounded, and 4 feet of photoelectrical coupler U5 are connected with one end of diode D7, the other end connection of diode D7 There are the one end resistance R12, the resistance R12 other ends to connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler 1 foot of U6, photoelectrical coupler U6 are connected with the one end resistance R13, another termination outside 24V power vd D24_OUT of resistance R13, light 2 feet of electric coupler U6 are connected with 4 feet of exclusion RP1, the 3 feet ground connection of photoelectrical coupler U6, the 4 feet connection of photoelectrical coupler U6 There are one end of diode D8, the other end of diode D8 to be connected with the one end resistance R14, the resistance R14 other ends connect 3.3V power supplys The 5-8 feet access of VCC33, exclusion RP1 have external 24V power vds D24_OUT.
The digital signal input circuit further includes photoelectrical coupler U7, and 1 foot of photoelectrical coupler U7 is connected with resistance R15 2 feet of one end, another termination outside 24V power vd D24_OUT, photoelectrical coupler U7 of resistance R15 are connected with 8 feet of exclusion RP5, 3 feet of photoelectrical coupler U7 are grounded, and 4 feet of photoelectrical coupler U7 are connected with one end of diode D9, the other end of diode D9 It is connected with the one end resistance R16, the resistance R16 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectricity coupling 1 foot of clutch U8, photoelectrical coupler U8 are connected with the one end resistance R19, another termination outside 24V power vds D24_ of resistance R19 2 feet of OUT, photoelectrical coupler U8 are connected with 7 feet of exclusion RP5, and 3 feet of photoelectrical coupler U8 are grounded, and the 4 of photoelectrical coupler U8 Foot is connected with one end of diode D10, and the other end of diode D10 is connected with the one end resistance R20, the connection of the resistance R20 other ends 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler U9, and 1 foot of photoelectrical coupler U9 is connected with resistance The one end R21, another termination outside 24V power vd D24_OUT of resistance R21,2 feet of photoelectrical coupler U9 are connected with the 6 of exclusion RP5 Foot, the 3 feet ground connection of photoelectrical coupler U9,4 feet of photoelectrical coupler U9 are connected with one end of diode D13, and diode D13's is another One end is connected with the one end resistance R22, and the resistance R22 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes light 1 foot of electric coupler U10, photoelectrical coupler U10 are connected with the one end resistance R23, another termination outside 24V power supplys of resistance R23 2 feet of VDD24_OUT, photoelectrical coupler U10 are connected with 5 feet of exclusion RP5, the 3 feet ground connection of photoelectrical coupler U10, photoelectricity coupling 4 feet of clutch U10 are connected with one end of diode D14, and the other end of diode D14 is connected with the one end resistance R24, resistance R24 The 1-4 feet access of the other end connection 3.3V power supply VCC33, exclusion RP5 have external 24V power vds D24_OUT.
The digital signal input circuit further includes row needle P4,2 feet of the 1 foot connection photoelectrical coupler U2 of row's needle P4, row 2 feet of the 2 feet connection photoelectrical coupler U4 of needle P4,2 feet of the 3 feet connection photoelectrical coupler U5 of row's needle P4,4 feet of row's needle P4 connect 2 feet of photoelectrical coupler U6,2 feet of the 5 feet connection photoelectrical coupler U7 of row's needle P4 are connect, 6 feet of row's needle P4 connect photoelectric coupling 2 feet of device U8,2 feet of the 7 feet connection photoelectrical coupler U9 of row's needle P4,2 feet of the 8 feet connection photoelectrical coupler U10 of row's needle P4, 9 feet of row's needle P4 meet GND_OUT, and 10 feet of row's needle P4 meet external 24V power vds D24_OUT.
4 feet of the photoelectrical coupler U2 are connected with 39 feet of chip U15, and 4 feet of photoelectrical coupler U4 are connected with chip 4 feet of 40 feet of U15, photoelectrical coupler U5 are connected with 41 feet of chip U15, and 4 feet of photoelectrical coupler U6 are connected with chip U15 42 feet, 4 feet of photoelectrical coupler U7 are connected with 43 feet of chip U15, and 4 feet of photoelectrical coupler U8 are connected with chip U15's 4 feet of 44 feet, photoelectrical coupler U9 are connected with 45 feet of chip U15, and 4 feet of photoelectrical coupler U10 are connected with the 46 of chip U15 Foot.
The digital signal input circuit shares the input of 8 railway digital signals, and respectively by exclusion RP1, RP2 of 100K 24V voltages are drawn to be isolated using optocoupler because interference of the high current for circuit system is isolated, 8 road signals correspond to 8 optocouplers are controlled respectively per road signal, and the resistance of the 1 pin concatenation 5.1K per road optocoupler pulls up 24V voltages, per the control of road signal 4 pins of optocoupler processed concatenate a light emitting diode and connect 3.3V voltages with the resistance of 1K, and the pin for connecting MCU is used for detecting Level height, is directly grounded per 3 pins of road signal.By taking first via input signal IN1 as an example, when input signal is low level When, optocoupler conducting, electric current flows through light emitting diode D1 from VCC33 makes this road of LED lighting mark have signal to pass through, and energy Enough detect that the PE8 pins of chip U15 become low level；When IN1 inputs are 24V voltage signals, optocoupler is not turned on, so MCU detects that the PE8 pins of chip U15 are high level.Input signal and outside 24V power supplys per railway digital channel are all connected to Needle P4 is arranged from external input.
The digital signal input circuit shares the input of 8 railway digital signals, and pulls up 24V electricity by the exclusion of 100K respectively Pressure, is isolated using optocoupler, and 8 road signals correspond to 8 optocouplers and controlled respectively per road signal, and high current has been isolated for circuit system The interference of system is realized and is not interfere with each other mutually between input signal.
The digital output circuit includes outputting circuit for relay and line driver output circuit, line driver output Circuit includes chip U1, and 4 feet, 12 feet and 16 feet of the model AM26LS31 of chip U1, chip U1 access 3.3V power supplys 1 foot of VCC33, chip U1 are connected with 63 feet of chip U15, and 7 feet of chip U1 are connected with 64 feet of chip U15, and the 9 of chip U1 Foot is connected with 65 feet of chip U15, and 15 feet of chip U1 are connected with 66 feet of chip U15, and 2 feet of chip U1 are connected with row's needle P2 1 foot, 3 feet of chip U1 are connected with 2 feet of row's needle P2, and 6 feet of chip U1 are connected with 3 feet of row's needle P2, and 5 feet of chip U1 connect 4 feet of the row of being connected to needle P2,10 feet of chip U1 are connected with 5 feet of row's needle P2, and 11 feet of chip U1 are connected with 6 feet of row's needle P2, 14 feet of chip U1 are connected with 7 feet of row's needle P2, and 13 feet of chip U1 are connected with 8 feet of row's needle P2, and 8 feet of chip U1 are grounded, 9 feet for arranging needle P2 connect GND_IN, the internal 24V power vds D24_IN of 10 feet connection of row's needle P2.
Line driver output circuit is mainly made of driving chip AM26LS31, by the voltage VCC33 power supplies of 3.3V, altogether There are four roads to input PC6-PC9 from the pwm signal of MCU connections, switch to two paths of differential signals after line driver per road signal, Low and high level is on the contrary, thus can Driving Stepping Motor or motor.Wherein line driver is supplied by the voltage VCC33 of 3.3V Electricity, it is 8 road differential signals that four tunnel output signals export after difference.
The outputting circuit for relay includes chip U3, and the signal of chip U3 is ULN2003A-SO16,1 foot of chip U3 57 feet of chip U15 are connected with, 2 feet of chip U3 are connected with 58 feet of chip U15, and 3 feet of chip U3 are connected with chip U15's 59 feet, 4 feet of chip U3 are connected with 60 feet of chip U15, and 5 feet of chip U3 are connected with 61 feet of chip U15, and the 6 of chip U3 Foot is connected with 62 feet of chip U15, the 8 feet ground connection of chip U3, the 9 feet connection 24V power vds D24 of chip U3.
16 feet of the chip U3 be connected with the one end light emitting diode D3, the one end diode D29, relay K1 5 feet, hair The optical diode D3 other ends are connected with the one end resistance R2, the resistance R2 other ends, the diode D29 other ends, relay K1 4 feet connect Enter 24V power vd D24,5 feet of 1 foot connection row's needle P1 of relay K1,1 foot of 3 feet connection row's needle P1 of relay K1, relay 3 feet of device K1 are connected with the one end capacitance C22, and the capacitance C22 other ends are connected with the one end resistance R26, resistance R26 other ends connection row 5 feet of needle P1；15 feet of chip U3 be connected with the one end light emitting diode D4, the one end diode D30, relay K2 5 feet, shine The diode D4 other ends are connected with the one end resistance R3, the 4 feet access of the resistance R3 other ends, the diode D30 other ends, relay K2 5 feet of 1 foot connection row's needle P1 of 24V power vd D24, relay K2,2 feet of 3 feet connection row's needle P1 of relay K2, relay 3 feet of K2 are connected with the one end capacitance C24, and the capacitance C24 other ends are connected with the one end resistance R27, resistance R27 other ends connection row's needle 5 feet of P1；14 feet of chip U3 be connected with the one end light emitting diode D5, the one end diode D32, relay K3 5 feet, shine two The pole pipe D5 other ends are connected with the one end resistance R4, the 4 feet access of the resistance R4 other ends, the diode D32 other ends, relay K3 5 feet of 1 foot connection row's needle P1 of 24V power vd D24, relay K3,3 feet of 3 feet connection row's needle P1 of relay K3, relay 3 feet of K3 are connected with the one end capacitance C25, and the capacitance C25 other ends are connected with the one end resistance R33, resistance R33 other ends connection row's needle 5 feet of P1；13 feet of chip U3 be connected with the one end light emitting diode D6, the one end diode D31, relay K4 5 feet, shine two The pole pipe D6 other ends are connected with the one end resistance R5, the 4 feet access of the resistance R5 other ends, the diode D31 other ends, relay K4 5 feet of 1 foot connection row's needle P1 of 24V power vd D24, relay K4,4 feet of 3 feet connection row's needle P1 of relay K4, relay 3 feet of K4 are connected with the one end capacitance C23, and the capacitance C23 other ends are connected with resistance R34 one end, resistance R34 other end connection row's needle 5 feet of P1.
12 feet of the chip U3 be connected with the one end light emitting diode D11, the one end diode D33, relay K5 5 feet, The light emitting diode D11 other ends are connected with the one end resistance R17, the resistance R17 other ends, the diode D33 other ends, relay K5 4 feet access 8 feet of 1 foot connection row's needle P1 of 24V power vd D24, relay K5, and the 3 feet connection of relay K5 arranges the 6 of needle P1 3 feet of foot, relay K5 are connected with the one end capacitance C26, and the capacitance C26 other ends are connected with the one end resistance R36, and resistance R36 is another 8 feet of end connection row's needle P1；11 feet of chip U3 are connected with the one end light emitting diode D12, the one end diode D34, relay K6 5 feet, the light emitting diode D12 other ends are connected with the one end resistance R18, the resistance R18 other ends, the diode D34 other ends, relay 8 feet of 1 foot connection row's needle P1 of 4 feet access 24V the power vd D24, relay K6 of device K6,3 feet connection row's needle of relay K6 3 feet of 7 feet of P1, relay K6 are connected with the one end capacitance C27, and the capacitance C27 other ends are connected with the one end resistance R37, resistance R37 8 feet of other end connection row's needle P1.
The outputting circuit for relay shares six railway digital signals, and driving capability is improved by driving chip ULN2003A, Control output is all carried out by relay by every road signal of driving chip, and all there are one the electricity of 10K per road output channel Resistance R2 is connected in parallel on the both ends of relay, also filter capacitor C22 with a zener diode D29 after connecting with light emitting diode D3 With resistance R25 and at the both ends of relay.The TTL logic levels exported in this way by MCU pins are after driving chip, with first For paths, if the PD10 outputs of chip U15 are low level, 5 pins of relay K1 are low level, then light emitting diode D3 is lighted, and indicates that the road has useful signal to pass through, while relay is connected, and the digital signal of a 24V voltages is exported by pin.
The digital output circuit includes line driver output circuit, line driver output circuit share four roads from The pwm signals of MCU connections inputs, and switchs to two paths of differential signals after line driver per road signal, low and high level on the contrary, by This can Driving Stepping Motor or motor, four tunnel output signals exported after difference be 8 road differential signals；
The digital output circuit further includes outputting circuit for relay, and outputting circuit for relay shares six railway digital signals, has High driving ability all carries out control output by every road signal of driving chip by relay.
The structure of the digital output circuit is simple, and circuit module is small, easy for installation, and current gain is high, work electricity Pressure is high, and temperature range is wide, and carrying load ability is strong, stable and reliable operation.
The interface and storage circuit include blue tooth interface circuit, 485 bus interface circuits, CAN interface circuit, CH340 serial port drives and interface circuit, EEPROM storage circuits and serial flash storage circuits.
The blue tooth interface circuit includes row needle X8, arranges the external bluetooths of needle X8, the BLE_ of the 1 foot connection bluetooth of row's needle X8 STATE feet, the BLE_RXD feet of the 1 foot connection bluetooth of row's needle X8, the BLE_TXD feet of the 1 foot connection bluetooth of row's needle X8 arrange needle The BLE_EN feet of the 1 foot connection bluetooth of X8,1 foot of row's needle X8 are connected with the one end resistance R35, and the resistance R35 other ends are connected with hair 2 feet of the one end optical diode D26, another termination power GND5 of light emitting diode D26, row's needle X8 are connected with 78 feet of chip U15, 3 feet of row's needle X8 are connected with 79 feet of chip U15, the 4 feet ground connection of row's needle X8, the 5 feet connection 5V power vds D50 of row's needle X8.
2,3 pins that the row of the being connected to seat X8 that serial ports 4 is drawn is obtained by MCU, for connecting bluetooth module.Draw 4, the 5 of row's seat Foot is separately connected power supply GND5 and VDD50 to provide power supply, the 1 foot series resistor R35 of row's needle X8 and luminous two to bluetooth module Pole pipe D26 is used to refer to bluetooth working condition, and when BLE_STATE is high level, light emitting diode is lighted, when BLE_STATE is Light emitting diode is in OFF state when low level.
485 bus interface circuit includes chip U17, the 1 foot connection of the model 7L184 of chip U17, chip U17 There are 26 feet of chip U15,2 feet and 3 feet of chip U17 to be connected with 23 feet of chip U15,4 feet of chip U17 are connected with chip 5 feet of 25 feet of U15, chip U17 connect power supply GND5, and 6 feet of chip U17 are connected with the 1 of the one end resistance R61 and connector J3 Foot, the resistance R61 other ends are connected with 6 feet of chip U17 and 2 feet of connector J3.
485 bus interface circuit by PA0, PA2, PA3 pin be connected to 485 bus driver chip 7L184 /R/ E, DE, R and D pin, VCC and GND pin are separately connected 5V power vds D50 and ground connection.A, B pin both ends and connecting resistance R61 lead to It crosses resistance both ends and is connected to connector J3.
The CAN interface circuit includes chip U16, and 1 foot of the model TJZ1050 of chip U16, chip U16 connect 96 feet of chip U15 are connected to, 4 feet of chip U16 are connected with 95 feet of chip U15, and 2 feet of chip U16 are connected with capacitance C53 mono- End, and power supply GND5 is accessed, 3 feet of chip U16 are connected with the capacitance C53 other ends, and access 5V power vd D50, chip U16's 7 feet are connected with the one end resistance R60 and 1 foot of connector J1, and the resistance R60 other ends connect 6 feet and connector J1 of chip U16 2 feet.
The CAN interface circuit passes through PB8, PB9 of MCU and RXD the and TXD pin phases of CAN bus driving chip Even, 5V power vds D50 is grounded and connected respectively after GND and VCC pin both ends serial capacitance C53.CAN bus driving chip Reference voltage pin VREF is hanging, and S pins ground connection, data output pins CANL and CANH concatenate a resistance both ends and be separately connected In 2,1 pin of connector J1.
The CH340 serial port drives and interface circuit include chip U14, row's needle X7, row needle X9, the model of chip U14 1 foot of CH340G-SOP16, chip U14 connect power supply GND5, and 2 feet of chip U14 are connected with one end of diode D19, two poles The other end of pipe D19 is connected with 69 feet of chip U15, and 3 feet of chip U14 are connected with one end of resistance R30, diode R30's The other end is connected with 68 feet of chip U15,5 feet connection row's needle of 4 feet connection 3.3V the power supply VCC33, chip U14 of chip U14 3 feet of X9,2 feet of the 6 feet connection row needle X9 of chip U14,7 feet of chip U14 are connected with the one end capacitance C20 and crystal oscillator OSC1 One end, capacitance C20 other ends ground connection, 8 feet of chip U14 are connected with the other end and the one end capacitance C21 of crystal oscillator OSC1, capacitance The C21 other ends are grounded, and 16 feet of chip U14 are connected with the one end capacitance C13, and access 3.3V power supply VCC33, and capacitance C13 is another End ground connection.
1 foot of row's needle X9 is connected with 1 foot of row's needle X7, and 2 feet of row's needle X9 are connected with 2 feet of row's needle X7, row's needle X9 3 feet be connected with 3 feet of row needle X7,5 feet of row's needle X9 are connected with 5 feet of row's needle X7, and access power supply GND5, the 1 of row's needle X7 Foot is connected with the one end resistance R25, and the resistance R25 other ends access 5V power vds D50.
CH340 serial port drives and interface circuit, including CH340 serial port drive circuits and USART-USB interface circuits, pass through This circuit can be system power supply and be downloaded into line program, serial communication function.Using CH340 chips, the serial ports one of MCU is used Serial port drive circuit is connected, specially one PA9, PA10 of serial ports is separately connected RXD the and TXD pins of chip.The both ends XI and XOUT 12M crystal oscillators OSC1 in parallel provides time-base signal for chip, and crystal oscillator both ends are separately connected capacity earth, plays and is carried out to pulse signal The effect of filtering.Chip is chip power supply by 1 pin GND and 16 pin VCC, and the port by serial port drive circuit output is believed Number communicated with host computer by UD+ and UD-, USART-USB interface circuits, by this circuit draw rs 232 serial interface signal with it is upper Position machine is communicated.It provides four line end mouths to be communicated, specifically be connected as：The Isosorbide-5-Nitrae pin of row seat X7 be separately connected VDD50 and GND5,2,3 pins are separately connected communication port UDATA+ and UDATA-, while hardware provides the microUSB in another 9 hole Interface, only 2/3 pin transmission data are separately connected UDATA+ and UDATA-, and it is system power supply that 1,5 pins, which connect power supply,.
The EEPROM storage circuits include chip U19, the model ATMEL11124c02 of chip U19, the 1 of chip U19 - 4 foot of foot accesses power supply GND5, and 7 feet of 8 feet connection 3.3V the power supply VCC33, chip U19 of chip U19 are connected with capacitance C54 mono- End, and power supply GND5 is accessed, the capacitance C54 other ends access 3.3V power supply VCC33, and 6 feet of chip U19 are connected with the 2 of exclusion RP2 5 feet of 92 feet of foot and chip U15, chip U19 are connected with 1 foot of exclusion RP2 and 93 feet of chip U15, the 5-8 of exclusion RP2 Foot connects 3.3V power supplys VCC33.
A0, A1, A2 pin and GND the concatenation ground connection of the ATMEL11124C02 chips of EEPROM storage circuits, VCC pin One end of connection capacitance C54 is connected with the 5-8 pins of exclusion RP2 in power supply VCC33, and the other end of capacitance C54 connects It is grounded after the WP pins of EEPROM, the PB6 pins of MCU, SDA pins is connected after 2 pins of SCL pins connection exclusion RP2 1 pin for connecting exclusion RP2 connects the PB7 pins of MCU later.
The serial flash storage circuits include chip U18, and 1 foot of chip U18 is connected with the one end resistance R62 and chip 2 feet of 29 feet of U15, the resistance R62 other ends access 3.3V power supply VCC33, chip U18 are connected with 31 feet of chip U15, chip 5 feet of U18 are connected with 32 feet of chip U15, and 6 feet of chip U18 are connected with 30 feet of chip U15,3 feet of chip U18,7 feet, 8 feet access 3.3V power supply VCC33, and the 4 of chip U18 is connected with power supply GND5.
The serial flash storage circuits use W25Q16 chips, are communicated with MCU using spi bus.Spi bus Three line construction mode, DIO, DO, CLK pin be separately connected PA7, PA6, PA5 pin of MCU, and the piece choosing of PA4 connection chips is drawn Foot CS.When chip selection signal CS is dragged down, chip is gated, clock pulses is provided for chip to be written and read operation by CLK pin. It is chip power supply that 8 and 4 pins of chip, which are separately connected VCC33 and GND5, and VCC33 is socketed on 7 pin HOLD of chip, and piece choosing is drawn Foot CS series resistors are connected with R62 with VCC33.
The interface possesses multiple communication interfaces with storage circuit：485 bus interface, CAN interface, USART-USB Interface etc., innovative extends blue tooth interface, can the digital and analog signaling of reading be converted to wireless signal and other The electronic equipment for being equipped with function of Bluetooth communication is communicated, and numerous bus interface can adapt to different systems, applicability It is strong with scalability.
The LCD is shown and key control circuit includes LCD display circuit, button and LED circuit, numeral method electricity Road.
The LCD display circuit includes LCD, and LCD is that 128*64LCD is shown, 1 foot of LCD is connected with the 88 of chip U15 2 feet of foot, LCD are connected with 55 feet of chip U15, and 3 feet of LCD are connected with 87 feet of chip U15, and 4 feet of LCD are connected with chip 8 feet of 86 feet of U15, LCD are connected with 84 feet of chip U15, and 12 feet of LCD are connected with 81 feet of chip U15,11 feet of LCD 83 feet of chip U15 are connected with, 10 feet of LCD are connected with 82 feet of chip U15, and 9 feet of LCD are connected with 85 feet of chip U15, 6 feet that 5 feet, 7 feet of LCD are connected with power supply VCC_DIS, LCD are connected with power supply GND5.
The LCD display circuit further includes OLED, the 1 foot connection of the model OLED-0.96-128*64, OLED of OLED There are 3 feet that 2 feet of power supply GND5, OLED are connected with power supply VCC_DIS, OLED to be connected with 84 feet of chip U15,4 feet of OLED 85 feet of chip U15 are connected with, 5 feet of OLED are connected with 83 feet of chip U15, and 6 feet of OLED are connected with the 82 of chip U15 7 feet of foot, OLED are connected with 82 feet of chip U15.
The LCD display circuit further includes toggle switch J12, and 1 foot of toggle switch J12 is connected with the one end resistance R53, and accesses 3.3V power vd D33-LED, the resistance R53 other ends connect power supply VCC_DIS, and 2 feet of toggle switch J12 connect power supply GND5, ox 12 feet of the 3 feet connection LCD of angled seat J12,11 feet of the 4 feet connection LCD of toggle switch J12, the 5 feet connection LCD's of toggle switch J12 10 feet, 8 feet of the 6 feet connection LCD of toggle switch J12,9 feet of the 7 feet connection LCD of toggle switch J12, the 8 feet connection of toggle switch J12 4 feet of LCD, 3 feet of the 9 feet connection LCD of toggle switch J12,2 feet of the 10 feet connection LCD of toggle switch J12, the 11 of toggle switch J12 Foot connects 1 foot of LCD, 14 feet of the 17 feet connection chip U15 of toggle switch J12, and 18 feet of toggle switch J12 connect chip U15's 14 feet.
The button and LED circuit include chip U26, the 1 foot access electricity of the model BC7277 of chip U26, chip U26 3 feet of source VCC_DIS, chip U26 access power supply GND5, and 2 feet of chip U26 are connected with 54 feet of chip U15, and the 4 of chip U26 Foot is connected with 51 feet of chip U15, and 24 feet of chip U26 are connected with 52 feet of chip U15, and 23 feet of chip U26 are connected with core 22 feet of 53 feet of piece U15, chip U26 are connected with 38 feet of chip U15, and 23 feet of chip U26 are connected with the one of resistance R50 End, the resistance R50 other ends access power supply VCC_DIS, and 23 feet of chip U26 are connected with one end of resistance R51, and resistance R51 is another It terminates into power supply VCC_DIS, 1 foot of chip U26 is connected with one end of resistance R52, and the other end of resistance R52 is connected with luminous two The one end pole pipe D40, the light emitting diode D40 other ends connect 22 feet of chip U26.
5 feet of the chip U26 are connected with the one end light emitting diode D52, and the light emitting diode D52 other ends connect chip 6 feet of 21 feet of U26, chip U26 are connected with the one end light emitting diode D53, and the light emitting diode D53 other ends connect chip U26 21 feet, 7 feet of chip U26 are connected with the one end light emitting diode D54, and the light emitting diode D54 other ends connect the 21 of chip U26 8 feet of foot, chip U26 are connected with the one end light emitting diode D55, and the light emitting diode D55 other ends connect 21 feet of chip U26, 9 feet of chip U26 are connected with the one end light emitting diode D56, and the light emitting diode D56 other ends connect 21 feet of chip U26, chip 10 feet of U26 are connected with the one end light emitting diode D57, and the light emitting diode D57 other ends connect 21 feet of chip U26, chip U26 11 feet be connected with the one end light emitting diode D58, the light emitting diode D58 other ends connect 21 feet of chip U26, chip U26's 12 feet are connected with the one end light emitting diode D59, and the light emitting diode D59 other ends connect 21 feet of chip U26.
13 feet of the chip U26 are connected with the one end resistance R52, and the resistance R52 other ends are connected with the one end button S1, button 14 feet of the one end S5, the one end button S9, the one end button S13, chip U26 are connected with the one end resistance R53, and the resistance R53 other ends connect It is connected to the one end button S2, the one end button S6, the one end button S10, the one end button S14,15 feet of chip U26 are connected with resistance R54 One end, the resistance R54 other ends are connected with the one end button S3, the one end button S7, the one end button S11, and 16 feet of chip U26 are connected with The one end resistance R55, the resistance R55 other ends are connected with the one end button S4, the one end button S8, the one end button S12, and button S1 is another End, the button S2 other ends, the button S3 other ends, the button S4 other ends are connected with the one end resistance R56, the connection of the resistance R56 other ends There are 17 feet of chip U26, the button S5 other ends, the button S6 other ends, the button S7 other ends, the button S8 other ends to be connected with resistance The one end R57, the resistance R57 other ends are connected with 18 feet of chip U26, and the button S9 other ends, the button S10 other ends, button S11 are another One end, the button S12 other ends are connected with the one end resistance R58, and the resistance R58 other ends are connected with 19 feet of chip U26, button S13 The other end, the button S14 other ends are connected with the one end resistance R59, and the resistance R59 other ends are connected with 20 feet of chip U26.
The digital pipe display circuit includes charactron U24 and charactron U25, the model of charactron U24 and charactron U25 For LED_5461,1 foot of charactron U24,1 foot of charactron U25 are connected with 9 feet of chip U26,2 feet, the number of charactron U24 2 feet of code pipe U25 are connected with 8 feet of chip U26, and 3 feet of charactron U24,3 feet of charactron U25 are connected with the 12 of chip U26 Foot, 4 feet of charactron U24,4 feet of charactron U25 are connected with 7 feet of chip U26,5 feet of charactron U24, charactron U25 5 feet are connected with 11 feet of chip U26, and 6 feet of charactron U24,6 feet of charactron U25 are connected with 16 feet of chip U26, digital 7 feet of pipe U24,7 feet of charactron U25 are connected with 6 feet of chip U26, the 8 feet connection of 8 feet, charactron U25 of charactron U24 There are 15 feet of chip U26,9 feet of charactron U24,9 feet of charactron U25 to be connected with 14 feet of chip U26, charactron U24's 10 feet, charactron U25 10 feet be connected with 10 feet of chip U26,11 feet of charactron U24,11 feet of charactron U25 are connected with 5 feet of chip U26,12 feet of charactron U24,12 feet of charactron U25 are connected with 13 feet of chip U26.
The MCU pins PD0-PD8 connected by toggle switch J12 is respectively connected to LCD_CS, LCD_ of LCD JLX12864G RS, LCD_RST, LCD_SCLK, LCD_SDA, LCD_ROM_CS, LCD_ROM_SCK, LCD_ROM_IN, LCD_ROM_OUT draw Foot, power cord VCC DIS and GND5 are separately connected 5,7 pins and 6 pins of LCD.
Matrix keyboard circuit schematic diagram, connection matrix keyboard in this manner, when by key pressing, the KEY of chip U26 Interrupt signal can occur for pin, while spi bus interface will serially be sent out key-press status, and DIG0~DIG7 is separately connected One end of R52~R59, R11, by R56, button S1~S4 is connected to DIG0~DIG3, DIG5 to DIG4 by R52~R55 respectively By R57, button S5~S8 is connected to DIG0~DIG3 by R52~R55 respectively, and DIG6 distinguishes button S9~S12 by R58 It is connected to DIG0~DIG3 by R52~R55, DIG7 distinguishes button S13, S14 by R59, and button S13, S14 pass through R52, R53 is connected to DIG0, DIG1.
The LCD is shown and two kinds of display modes of key control circuit set are in system：LCD is shown and charactron is aobvious Show.According to different information features, can classify the more information of display.
The system power supply circuit includes external input power, simulation and digital power and button display panel power supply.
The button display panel power supply includes inductance L4, and one end of inductance L4 is connected with the one end capacitance C17 and 3.3V power supplys The other end of VCC33, capacitance C17 other ends ground connection, inductance L4 are connected with the one end capacitance C18, the one end capacitance C19, and export and be LED provides 3.3V power vd D33-LED, capacitance the C18 other end, capacitance C19 other ends ground connection.
The external input power includes common mode inductance D18, and 1 foot of common mode inductance D18 is connected with zener diode D21's One end, the 3 feet ground connection of the other end connection 24V power supply VCC24_IN, common mode inductance D18 of zener diode D21, common mode inductance 2 feet of D18 be connected with one end of capacitance C14, chip D17 1 foot, and out-put supply VDD24, capacitance C14 the other end ground connection, 2 feet of chip D17 model LM2576BU-TO223, chip D17 are connected with one end and the zener diode D22 mono- of inductance L3 End, zener diode D22 other ends ground connection, the other end of inductance L3 are connected with the one end resistance R28, the one end capacitance C16, capacitance The one end C15, and 5V power vd D50 are exported, the capacitance C16 other ends, capacitance C15 other ends ground connection, the resistance R28 other ends are connected with The one end resistance R32, resistance R32 other ends ground connection, 3 feet of chip D17,5 feet, 6 feet ground connection, 5 feet of chip D17 are connected with resistance R28 and resistance R32.
The simulation and digital power include inductance L1 and inductance L2, and the one end inductance L1 is connected with capacitance C1 mono-, and connects Entering 5V power vd D50, capacitance C1 other ends ground connection, the one end inductance L2 is grounded, another termination 5V analog power AVDD50 of inductance L1, The inductance L2 other ends are connected with the one end capacitance C2, and meet simulation ground AGND, and the capacitance C2 other ends connect the inductance L1 other ends；Simulation And digital power includes inductance L5, the one end inductance L3 is connected with capacitance C3 mono-, and accesses 3.3V power supply VCC33, and capacitance C3 is another One termination simulates ground AGND, another termination 3.3V analog power AVDD33 of inductance L5, and the inductance L5 other ends are connected with capacitance C4 mono- End, capacitance C4 other ends connection simulation ground AGND.
The simulation and digital power further include chip U12, the model REG117FA-3.3 of chip U12, chip U12's 3 feet are connected with the one end capacitance C10, and meet 5V power vd D50, capacitance C10 other ends ground connection, the 1 foot ground connection of chip U12, chip 2 feet of U12 are connected with the one end capacitance C11, the one end capacitance C12, the one end resistance R29, and export 3.3V power supply VCC33, capacitance C11 The other end, capacitance C12 other ends ground connection, the resistance R29 other ends are connected with the one end light emitting diode D25, and light emitting diode D25 is another One end is grounded.
The external input power circuit is compatible with 24V supply voltages, by external input power circuit by 24V power supplys into Row voltage stabilizing is depressured, using LM2576BU chips.External 24V power supplys pass through common mode inductance D18 input systems, parallel filtering capacitance Step-down switching chip D17 is connected after C14, connecting diode D22 by 2 pins is grounded, the supply voltage after output buck, Inductance L3 and capacitance C16 is in parallel with D22 after connecting, and 4 pins are connected to the common end of R32 and R28, and the other end of R32 is grounded, The other end of R28 is connected with the common end of inductance L3 and C16, and 3,5,6 pins are directly grounded, and the 5V voltages after being depressured most pass through afterwards 5V voltages are exported after crossing filter capacitor C15 ground connection filtering, the other end of C15 is connected with the common end of inductance L3 and C16.
The simulation and digital power circuit include analog power circuit and digital power circuit, and analog power circuit will be outer The 5V voltage signals of portion's input circuit output carry out isolation processing so that can be with the analog portion of access system.5V power sources in parallel L1 and L2 inductance is concatenated after filter capacitor C1 respectively, later shunt capacitance C2, output analog power AVDD50 and AGND.Digital electricity After source VCC33 and AGND parallel filtering capacitance C3, inductance L5 and capacitance C4 connect and in the both ends C3, the common end of wherein L5 and C4 Export analog power AVDD33.Digital power circuit, the number that decompression is 3.3V after this circuit is handled the digital power of 5V Word power supply, after specially VDD50 parallel filterings capacitance C10, VDD50 and GND5 are separately connected lowering and stabilizing blood pressure chip U12, and 2 draw Foot exports 3.3V voltages, and for common end, resistance R29 and light emitting diode D25 with C11, C12 are connected in parallel on U12 to 1 pin after connecting Output end, wherein D25 is used to refer to power supply and correctly exports.
The system power supply circuit includes external input power, simulation and digital power and button display panel power supply, outside Input power circuit is compatible with 24V supply voltages, and 24V power supplys are carried out voltage stabilizing decompression by external input power circuit, external Input power circuit only needs few peripheral components that can constitute efficient regulator circuit, acquires the input of 24V voltage digital signals Exported with control, be system modules for different voltage, the 5V that outside input circuit export by analog power circuit is electric Press signal to carry out isolation processing so that can with the analog portion of access system, after the digital power of 5V is handled decompression be The digital power of 3.3V.
The buzzer alarm circuit includes triode D24, and 1 foot of triode D24 is connected with the one end resistance R31, resistance The R31 other ends are connected with 35 feet of chip U15, the 3 feet ground connection of triode D24, and 2 feet of triode D24 are connected with buzzer B1 2 feet, the 1 foot access 5V power vds D50 of buzzer B1.
Multiplexed signal sampling of the present invention has a wide range of application with processing system, can be applied to it is arbitrary need carry out signal The place of acquisition and processing can be applied to agricultural aspect, industrial aspect, medical treatment aspect, teaching aspect etc., such as applied to agricultural The digital signal acquiring of aspect can be used for acquiring involved in soil epidemic disaster data and the field management in agricultural experiment field Cultivate the data such as date and number, dose, Pesticide use amount；Digital medical signal acquisition in terms of applied to medical treatment, can To acquire the various physical quantitys of biotic potential, heart sound, body temperature, blood pressure, blood flow etc. human body, needed in terms of can also acquiring other medical treatment The signal to be detected；Digitized signal acquisition in terms of applied to teaching, acquires containing for air PM2.5 in can imparting knowledge to students outdoors Amount, humidity, temperature etc. digital signal also can acquire and handle the number letter being applied in other biological, physics etc. teaching Number.
The above is the citing of best mode for carrying out the invention, wherein the part that do not address in detail is that this field is common The common knowledge of technical staff.Protection scope of the present invention is based on the contents of the claims, any technology based on the present invention The equivalent transformation of enlightenment and progress, also within protection scope of the present invention.

Claims (10)

1. a kind of multiplexed signal sampling and processing system with strong anti-interference ability, including MCU governor circuits, MCU master control electricity Road is connected with digital input circuit and interface and storage circuit, it is characterised in that：The MCU governor circuits include chip U15, core The model STM32F103V of piece U15, digital signal input circuit include photoelectrical coupler, and interface and storage circuit include bluetooth Interface circuit, 485 bus interface circuits, CAN interface circuit, CH340 serial port drives and interface circuit.
2. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：12 feet of the chip U15 are connected with the one end crystal oscillator X4 and the one end capacitance C36, and it is another that 13 feet of chip U15 are connected with crystal oscillator X4 One end and the one end capacitance C37, the capacitance C36 other ends, capacitance C37 other ends ground connection, 9 feet of chip U15 are connected with crystal oscillator X6 mono- End and the one end capacitance C38,8 feet of chip U15 are connected with the crystal oscillator X6 other ends and the capacitance C39 other ends, the capacitance C38 other ends, The capacitance C39 other ends are grounded；
6 feet of the chip U15 are connected with the one end diode D16 and the one end diode D15, the connection of the diode D16 other ends 3.3V power supply VCC33, the diode D15 other ends are connected with one end of lithium battery BAT1, the other end ground connection of lithium battery BAT1；
76 feet of the chip U15 are connected with 1 foot of row's seat P3, and 72 feet of chip U15 are connected with row's seat P3 2 feet, the 3 feet ground connection of row seat P3；
94 feet of the chip U15 are connected with 2 feet of ship type switch K8, and 3 feet of ship type switch K8 connect 3.3V power supply VCC33, 1 foot of ship type switch K8 is grounded；
37 feet of the chip U15 are connected with the one end resistance R39, resistance R39 other ends ground connection；
14 feet of the chip U15 are connected with the one end resistance R66, the one end key switch K7, the one end capacitance C40, the one end resistance R66 Connect 3.3V power supply VCC33, capacitance the C40 other end, key switch K7 other ends ground connection；
97 feet of the chip U15 are connected with the one end diode D20, and the diode D20 other ends are connected with the one end resistance R42, electricity Hinder R42 other ends connection 3.3V power supplys VCC33；98 feet of chip U15 are connected with the one end diode D23, the diode D23 other ends It is connected with the one end resistance R43, the resistance R43 other ends connect 3.3V power supplys VCC33；1 foot of chip U15 is connected with diode D27 One end, the diode D27 other ends are connected with the one end resistance R44, and the resistance R44 other ends connect 3.3V power supplys VCC33.
3. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The digital signal input circuit includes photoelectrical coupler U2, and 1 foot of photoelectrical coupler U2 is connected with the one end resistance R6, electricity 2 feet of 24V power vd D24_OUT, photoelectrical coupler U2 are connected with 1 foot of exclusion RP1, photoelectric coupling outside another terminations of resistance R6 3 feet of device U2 are grounded, and 4 feet of photoelectrical coupler U2 are connected with one end of diode D1, and the other end of diode D1 is connected with electricity The one end R7 is hindered, the resistance R7 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler U4, light 1 foot of electric coupler U4 is connected with the one end resistance R8, another termination outside 24V power vd D24_OUT of resistance R8, photoelectrical coupler 2 feet of U4 are connected with 2 feet of exclusion RP1, the 3 feet ground connection of photoelectrical coupler U2, and 4 feet of photoelectrical coupler U4 are connected with diode The other end of one end of D2, diode D2 is connected with the one end resistance R9, and the resistance R9 other ends connect 3.3V power supplys VCC33；Number Signal input circuit further includes photoelectrical coupler U5, and 1 foot of photoelectrical coupler U5 is connected with the one end resistance R11, and resistance R11 is another 2 feet of termination external 24V power vd D24_OUT, photoelectrical coupler U5 are connected with 3 feet of exclusion RP1, and the 3 of photoelectrical coupler U5 Foot is grounded, and 4 feet of photoelectrical coupler U5 are connected with one end of diode D7, and the other end of diode D7 is connected with resistance R12 mono- End, the resistance R12 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler U6, photoelectric coupling 1 foot of device U6 is connected with the one end resistance R13,24V power vd D24_OUT outside another terminations of resistance R13, photoelectrical coupler U6's 2 feet are connected with 4 feet of exclusion RP1, the 3 feet ground connection of photoelectrical coupler U6, and 4 feet of photoelectrical coupler U6 are connected with diode D8's The other end of one end, diode D8 is connected with the one end resistance R14, and the resistance R14 other ends connect 3.3V power supply VCC33, exclusion RP1 5-8 feet access have external 24V power vds D24_OUT.
4. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The digital signal input circuit further includes photoelectrical coupler U7, and 1 foot of photoelectrical coupler U7 is connected with the one end resistance R15, 2 feet of 24V power vd D24_OUT, photoelectrical coupler U7 are connected with 8 feet of exclusion RP5, photoelectricity outside another terminations of resistance R15 3 feet of coupler U7 are grounded, and 4 feet of photoelectrical coupler U7 are connected with one end of diode D9, the other end connection of diode D9 There are the one end resistance R16, the resistance R16 other ends to connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectrical coupler 1 foot of U8, photoelectrical coupler U8 are connected with the one end resistance R19, another termination outside 24V power vd D24_OUT of resistance R19, light 2 feet of electric coupler U8 are connected with 7 feet of exclusion RP5, the 3 feet ground connection of photoelectrical coupler U8, the 4 feet connection of photoelectrical coupler U8 There are one end of diode D10, the other end of diode D10 to be connected with the one end resistance R20, the resistance R20 other ends connect 3.3V electricity Source VCC33；Digital signal input circuit further includes photoelectrical coupler U9, and 1 foot of photoelectrical coupler U9 is connected with resistance R21 mono- 2 feet at end, another termination outside 24V power vd D24_OUT, photoelectrical coupler U9 of resistance R21 are connected with 6 feet of exclusion RP5, light 3 feet of electric coupler U9 are grounded, and 4 feet of photoelectrical coupler U9 are connected with one end of diode D13, the other end of diode D13 It is connected with the one end resistance R22, the resistance R22 other ends connect 3.3V power supplys VCC33；Digital signal input circuit further includes photoelectricity coupling 1 foot of clutch U10, photoelectrical coupler U10 are connected with the one end resistance R23, another termination outside 24V power vds D24_ of resistance R23 2 feet of OUT, photoelectrical coupler U10 are connected with 5 feet of exclusion RP5, the 3 feet ground connection of photoelectrical coupler U10, photoelectrical coupler U10 4 feet be connected with one end of diode D14, the other end of diode D14 is connected with the one end resistance R24, and the resistance R24 other ends connect 3.3V power supply VCC33 are met, the 1-4 feet access of exclusion RP5 has external 24V power vds D24_OUT.
5. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The digital signal input circuit further includes row needle P4, and 1 foot of row's needle P4 is connected with 2 feet of photoelectrical coupler U2, row's needle P4 2 feet connection photoelectrical coupler U4 2 feet, 3 feet of row's needle P4 are connected with 2 feet of photoelectrical coupler U5, the 4 feet connection of row's needle P4 There are 2 feet of photoelectrical coupler U6,5 feet of row's needle P4 to be connected with 2 feet of photoelectrical coupler U7,6 feet of row's needle P4 are connected with photoelectricity 7 feet of 2 feet of coupler U8, row's needle P4 are connected with 2 feet of photoelectrical coupler U9, and 8 feet of row's needle P4 are connected with photoelectrical coupler 9 feet of 2 feet of U10, row's needle P4 meet GND_OUT, and 10 feet of row's needle P4 meet external 24V power vds D24_OUT；
4 feet of the photoelectrical coupler U2 are connected with 39 feet of chip U15, and 4 feet of photoelectrical coupler U4 are connected with chip U15's 4 feet of 40 feet, photoelectrical coupler U5 are connected with 41 feet of chip U15, and 4 feet of photoelectrical coupler U6 are connected with the 42 of chip U15 4 feet of foot, photoelectrical coupler U7 are connected with 43 feet of chip U15, and 4 feet of photoelectrical coupler U8 are connected with 44 feet of chip U15, 4 feet of photoelectrical coupler U9 are connected with 45 feet of chip U15, and 4 feet of photoelectrical coupler U10 are connected with 46 feet of chip U15.
6. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The blue tooth interface circuit includes row needle X8, arranges the external bluetooths of needle X8, the BLE_STATE of the 1 foot connection bluetooth of row's needle X8 Foot, the BLE_RXD feet of the 1 foot connection bluetooth of row's needle X8, the BLE_TXD feet of the 1 foot connection bluetooth of row's needle X8, the 1 of row's needle X8 Foot connects the BLE_EN feet of bluetooth, and 1 foot of row's needle X8 is connected with the one end resistance R35, and the resistance R35 other ends are connected with light-emitting diodes 2 feet of the one end pipe D26, another termination power GND5 of light emitting diode D26, row's needle X8 are connected with 78 feet of chip U15, row's needle X8 3 feet be connected with 79 feet of chip U15, the 4 feet ground connection of row's needle X8, the 5 feet connection 5V power vds D50 of row's needle X8.
7. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：485 bus interface circuit includes chip U17, and 1 foot of the model 7L184 of chip U17, chip U17 are connected with chip 26 feet of U15,2 feet and 3 feet of chip U17 are connected with 23 feet of chip U15, and 4 feet of chip U17 are connected with the 25 of chip U15 5 feet of foot, chip U17 connect power supply GND5, and 6 feet of chip U17 are connected with the one end resistance R61 and 1 foot of connector J3, resistance The R61 other ends are connected with 6 feet of chip U17 and 2 feet of connector J3.
8. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The CAN interface circuit includes chip U16, and 1 foot of the model TJZ1050 of chip U16, chip U16 are connected with core 4 feet of 96 feet of piece U15, chip U16 are connected with 95 feet of chip U15, and 2 feet of chip U16 are connected with the one end capacitance C53, and Power supply GND5 is accessed, 3 feet of chip U16 are connected with the capacitance C53 other ends, and access 5V power vd D50, and 7 feet of chip U16 connect It is connected to the one end resistance R60 and 1 foot of connector J1, the resistance R60 other ends connect 2 feet of 6 feet and connector J1 of chip U16.
9. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The CH340 serial port drives and interface circuit include chip U14, row's needle X7, row needle X9, the model of chip U14 1 foot of CH340G-SOP16, chip U14 connect power supply GND5, and 2 feet of chip U14 are connected with one end of diode D19, two poles The other end of pipe D19 is connected with 69 feet of chip U15, and 3 feet of chip U14 are connected with one end of resistance R30, diode R30's The other end is connected with 68 feet of chip U15,5 feet connection row's needle of 4 feet connection 3.3V the power supply VCC33, chip U14 of chip U14 3 feet of X9,2 feet of the 6 feet connection row needle X9 of chip U14,7 feet of chip U14 are connected with the one end capacitance C20 and crystal oscillator OSC1 One end, capacitance C20 other ends ground connection, 8 feet of chip U14 are connected with the other end and the one end capacitance C21 of crystal oscillator OSC1, capacitance The C21 other ends are grounded, and 16 feet of chip U14 are connected with the one end capacitance C13, and access 3.3V power supply VCC33, and capacitance C13 is another End ground connection；
1 foot of row's needle X9 is connected with 1 foot of row's needle X7, and 2 feet of row's needle X9 are connected with 2 feet of row's needle X7,3 feet of row's needle X9 5 feet of 3 feet of the row of being connected with needle X7, row's needle X9 are connected with 5 feet of row's needle X7, and access power supply GND5, the 1 foot connection of row's needle X7 There are the one end resistance R25, the resistance R25 other ends to access 5V power vds D50.
10. a kind of multiplexed signal sampling and processing system with strong anti-interference ability as described in claim 1, feature exist In：The EEPROM storage circuits include chip U19,1 foot -4 of the model ATMEL11124c02 of chip U19, chip U19 Foot accesses power supply GND5, and 7 feet of 8 feet connection 3.3V the power supply VCC33, chip U19 of chip U19 are connected with the one end capacitance C54, and Access power supply GND5,6 feet of capacitance C54 other ends access 3.3V power supply VCC33, chip U19 be connected with exclusion RP2 2 feet and 5 feet of 92 feet of chip U15, chip U19 are connected with 1 foot of exclusion RP2 and 93 feet of chip U15, and the 5-8 feet of exclusion RP2 connect Meet 3.3V power supplys VCC33；
The serial flash storage circuits include chip U18, and 1 foot of chip U18 is connected with the one end resistance R62 and chip U15 2 feet of 29 feet, the resistance R62 other ends access 3.3V power supply VCC33, chip U18 are connected with 31 feet of chip U15, chip U18's 5 feet are connected with 32 feet of chip U15, and 6 feet of chip U18 are connected with 30 feet of chip U15, and 3 feet, 7 feet, 8 feet of chip U18 connect Enter 3.3V power supply VCC33, the 4 of chip U18 is connected with power supply GND5.
CN201810138406.4A 2018-02-10 2018-02-10 A kind of multiplexed signal sampling and processing system with strong anti-interference ability Pending CN108388172A (en)

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CN110887524A (en) * 2019-11-28 2020-03-17 苏州长风航空电子有限公司 Temperature and humidity detection system

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Application publication date: 20180810