CN110068364A - A kind of Wetland Environment monitoring number adopts circuit - Google Patents

A kind of Wetland Environment monitoring number adopts circuit Download PDF

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Publication number
CN110068364A
CN110068364A CN201910232278.4A CN201910232278A CN110068364A CN 110068364 A CN110068364 A CN 110068364A CN 201910232278 A CN201910232278 A CN 201910232278A CN 110068364 A CN110068364 A CN 110068364A
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China
Prior art keywords
pins
capacitor
chip
resistance
circuit
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CN201910232278.4A
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Chinese (zh)
Inventor
章雪挺
廖章锦
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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Priority to CN201910232278.4A priority Critical patent/CN110068364A/en
Publication of CN110068364A publication Critical patent/CN110068364A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass

Abstract

The invention discloses a kind of Wetland Environment monitoring numbers to adopt circuit.The present invention includes power circuit, sensor signal conversion circuit, governor circuit, RTC clock circuit and LCD screen control circuit.Sensor signal conversion circuit includes USART conversion circuit, CAN bus conversion circuit, 485 bus switching circuits and A/D converter circuit.RTC clock circuit provides clock signal by clock chip for the main control chip in governor circuit.A/D converter circuit includes modulus conversion chip.USART conversion circuit includes serial port chip.CAN bus conversion circuit includes CAN bus driver/receiver and the first surge suppression modules.485 bus switching circuits include 485 bus drivers/receiver and the second surge suppression modules.The present invention can every environmental parameter in Quick Acquisition wetland, and then Wetland Environment can targetedly be intervened.

Description

A kind of Wetland Environment monitoring number adopts circuit
Technical field
The invention belongs to Wetland Environment monitoring technical fields, and in particular to a kind of Wetland Environment monitoring number adopts circuit.
Background technique
Wetland is known as the kidney of the earth, can filter and clean drinking water, and for many index species such as cattails, Crane, alligator etc. provide habitat.Coast wet land resources are protected in the society of China's Coastal Areas, expanding economy and ecological environment It played an important role in shield, produce huge society, economic value, made for the economic liftoff of China's Coastal Areas Positive contribution.But it with coastal area society, expanding economy, is also exposed in the development and utilization of coast wet land resources Many problems are gone out, unreasonable development and utilization bring some irremediable losses and influence to coast wet land resources. Main problem is as follows: (1) project to enclose sea areas causes coastal Wetland Area sharply to reduce (2) coastal wetland values using lacking overall rule It draws (3) and encloses tideland for cultivation wetland and be not fully utilized that by the threat (5) of wetland pollution aggravation to be reopened hair light for (4) coastal Wetland ecological system Protection causes ecological environment destruction (6) to cause to retreat along the coastline along the destruction of marine swamp.
Existing Wetland Environment monitoring system status and problem:
Wetland Environment monitoring data are people's understanding, the basis for developing and utilizing wetland, are Wetland Environment protection work Key link.Reinforce the management of Wetland Environment monitoring data and shared service is one of wetland administration function, while being also to push away Dynamic monitoring data are wetland economic development, improve the important leverage of Wetland Environment protection level of decision-making.Wetland has money abundant Source can provide powerful material base for the sustainable development of human society.It constantly raises speed recently as urbanization process, it is wet Ground development activities are gradually aggravated, and problems occurs in Wetland Environment.Therefore, Wetland Environment Effect Evaluation is carried out, is to add Strong wet land protection carries out wetland planning and strengthens the important foundation and scientific basis of wetland management.In recent years, with science and technology Development, informationization gradually penetrate into traditional monitoring pattern, the combination of high-tech and traditional mode.Businessization monitoring and online The parallel of monitoring also accordingly changes Wetland Environment and monitors daily work and way to manage.Meanwhile Ecological Civilization Construction works Propulsion, the proposition of the extra large theory of ecology, to Wetland Environment protection work, higher requirements are also raised, and Wetland Environment monitors number According to management and application service also accordingly produce new demand.But our wetland condition monitoring also has many problems, such as: (1) data quality control process lacks unified standard.(2) data collection supervision is insufficient.(3) database establishment lacks unified planning.(4) Lacking has intellectual, policy-making data product.
Summary of the invention
The purpose of the present invention is to provide a kind of Wetland Environment monitoring numbers to adopt circuit.
The present invention includes power circuit, sensor signal conversion circuit, governor circuit, RTC clock circuit and LCD screen control Circuit.The sensor signal conversion circuit includes USART conversion circuit, CAN bus conversion circuit, 485 general line systems electricity Road and A/D converter circuit.RTC clock circuit provides clock signal by clock chip for the main control chip in governor circuit.It is described Power circuit include that 5V number adopts power supply module, 3.3V number adopts power supply module and 2.5V reference voltage provides module.5V number adopts confession It is sensor signal conversion circuit, governor circuit and RTC clock circuit power supply that electric module, 3.3V number, which adopt power supply module,.2.5V base Quasi- voltage provides module and provides reference voltage for A/D converter circuit.
The A/D converter circuit includes two AD conversion units.AD conversion unit includes modulus conversion chip.Modulus turns Change 24 modulus conversion chips that chip uses model ADS1256.1 pin of modulus conversion chip is with polar capacitor C29's Anode, one end of capacitor C30 and 5V number adopt the+5V power output end of power supply module.The cathode and capacitor C30 of polar capacitor C29 The other end connect common ground wire.4 pins of modulus conversion chip connect 2.5V reference voltage and provide the reference voltage output of module End, 3 pins connect common ground wire, and 6 pins, 7 pins, 8 pins, 9 pins, 10 pins, 11 pins, 12 pins, 13 pins are modulus Eight analog input pins of conversion chip.5 pins and 2 pins of modulus conversion chip connect common ground wire, and 14 pins connect 3.3V number adopts the 3.3V power output end 3V3 of power supply module.24 pins, 23 pins, 22 pins, 21 pins of modulus conversion chip It is separately connected with one end of resistance R16, resistance R17, resistance R18, resistance R19.20 pins of modulus conversion chip connect commonly Line, one end connection of the anode and capacitor C33 of Light-emitting diode LED 6, the other end and capacitor C34 of 18 pins and crystal oscillator Y1 One end connection.The other end of capacitor C33 and capacitor C34 connect common ground wire.17 pins of modulus conversion chip connect common ground wire. 15 pins and 16 pins of modulus conversion chip connect one end of capacitor C31, the anode of polar capacitor C32 and 3.3V number and adopt power supply The 3.3V power output end 3V3 of module.The other end of capacitor C31, the cathode of polar capacitor C32 connect common ground wire.
Resistance R16 in first AD conversion unit, resistance R17, resistance R18, resistance R19 the other end be respectively AD conversion The first clock end, the first receiving end, the first transmitting terminal, the first chip select terminal of circuit.Resistance R16 in second AD conversion unit, Resistance R17, resistance R18, resistance R19 the other end be respectively the second clock end of A/D converter circuit, the second receiving end, second hair Sending end, the second chip select terminal.The first clock end, the first receiving end, the first transmitting terminal, the first chip select terminal, second of A/D converter circuit Clock end, the second receiving end, the second transmitting terminal, the second chip select terminal are connect with governor circuit.
The USART conversion circuit includes three USART converting units.USART converting unit includes serial port chip.String Mouth isolating chip uses the isolated serial port chip of model RSM232.One end of 1 pin connecting resistance R11 of serial port chip, polarity The anode of capacitor C16, one end of capacitor C17, the cathode of transient supression diode TVS2 and 5V number adopt the+5V power supply of power supply module Output end.4 pins of serial port chip are the output serial ports receiving end of USART conversion circuit.3 pins of serial port chip are USART The output serial ports transmitting terminal of conversion circuit.The anode of the other end sending and receiving optical diode LED3 of resistance R11.Draw the 2 of serial port chip Foot, the cathode of Light-emitting diode LED 3, the cathode of polar capacitor C16, the other end of capacitor C17, transient supression diode TVS2 Positive connection be followed by digitally line.6 pins and transient supression diode TVS1, transient supression diode of serial port chip One end connection of the cathode and self-recovery fuse RT1 of TVS3.7 pins and transient supression diode TVS1 of serial port chip are just One end of pole, the cathode of transient supression diode TVS4 and self-recovery fuse RT2 connects.8 pins of serial port chip and transition Inhibit one end connection of diode TVS3, the anode of transient supression diode TVS4, resistance RM1 and capacitor CM1.Self- recoverage insurance The other end of silk RT1 is connect with the first terminals of anti-thunder tube GDT1.That end of self-recovery fuse RT1 far from serial port chip is The serial ports receiving end of USART converting unit.The other end of self-recovery fuse RT2 and the second terminals of anti-thunder tube GDT1 connect It connects.That end of self-recovery fuse RT2 far from serial port chip is the serial ports transmitting terminal TOUT1 of USART converting unit.Resistance RM1, The other end of capacitor CM1 and the third terminals of anti-thunder tube GDT1 connect digital ground wire.
4 pins of serial port chip are respectively that the first output serial ports of USART conversion circuit connects in three USART converting units Receiving end, the second output serial ports receiving end, third export serial ports receiving end.3 pins of serial port chip in three USART converting units Respectively the first output serial ports transmitting terminal of USART conversion circuit, the second output serial ports transmitting terminal, third output serial ports are sent End.The first output serial ports receiving end, the second output serial ports receiving end, the third output serial ports receiving end, the of USART conversion circuit One output serial ports transmitting terminal, the second output serial ports transmitting terminal, third output serial ports transmitting terminal are connect with governor circuit.
The CAN bus conversion circuit includes CAN bus driver/receiver and the first surge suppression modules.CAN is total Line drive/receiver uses the isolated can bus transceiving chip of model CTM1051M.First surge suppression modules use type Number be SP00S12 signal surge suppressor.4 pins of CAN bus driver/receiver connect the anode of polar capacitor C41, electricity Hold one end of C42, the cathode of transient supression diode TVS13, the anode of Light-emitting diode LED 6 and 5V number adopt power supply module+ 5V power output end.The cathode of polar capacitor C41, the other end of capacitor C42, transient supression diode TVS13 it is positive, luminous The cathode of diode (LED) 6 and 3 pins of CAN bus driver/receiver connect digital ground wire.CAN bus driver/reception 7 pins of device connect 5 pins of the first surge suppression modules, and 6 pins connect 8 pins of the first surge suppression modules.CAN bus driving 5 pin of device/receiver, 6 pins of the first surge suppression modules and 7 pins connect digital ground wire.First surge suppression modules 2 pins and 3 pins be connected with one end of resistance R24 and capacitor C43 and connect digital ground wire.Resistance R24's and capacitor C43 is another End connects the+5V power output end that 5V number adopts power supply module.4 pins of the first surge suppression modules are CAN bus conversion circuit CAN high position data transmission end.1 pin of the first surge suppression modules is that the CAN low data of CAN bus conversion circuit transmits End.Output signal receiving end of 1 pin of CAN bus driver/receiver as CAN bus conversion circuit, 2 pin conducts The output signal transmitting terminal of CAN bus conversion circuit.The output signal receiving end of CAN bus conversion circuit, output signal are sent End is connect with governor circuit.
485 bus switching circuits include 485 bus drivers/receiver and the second surge suppression modules.485 is total Line drive/receiver uses the 485 bus transceiving chip of isolation of model RSM485, and the second surge suppression modules use model For the signal surge suppressor of SP00S12.485 bus drivers/receiver, 1 pin connects the anode of polar capacitor C44, capacitor One end of C45, the cathode of transient supression diode TVS14, the anode of Light-emitting diode LED 7 and 5V number adopt the+5V of power supply module Power output end.The cathode of polar capacitor C44, the other end of capacitor C45, the positive of transient supression diode TVS14, luminous two The cathode of pole pipe LED7 and 485 bus drivers/receiver, 2 pin connect digital ground wire.485 bus drivers/receiver 7 pin connecting resistance R25 one end, one end of 8 pin connecting resistance R26 and 5 pins of the second surge suppression modules, 9 pins connect 8 pins of the other end of resistance R25 and the second surge suppression modules.485 bus drivers/receiver, 10 pin, resistance R26 The other end, the second surge suppression modules 6 pins and 7 pins connect digital ground wire.2 pins of the second surge suppression modules and 3 pins are connected with one end of resistance R27 and capacitor C46, and connect digital ground wire.The other end of resistance R27 and capacitor C46 connect 5V number adopts the+5V power output end of power supply module.4 pins of the second surge suppression modules are 485 numbers of 485 bus switching circuits According to transmission negative terminal.1 pin of the second surge suppression modules is that 485 data of 485 bus switching circuits transmit anode.485 buses Output signal receiving end of 3 pins of driver/receiver as 485 bus switching circuits.485 bus drivers/receiver Output signal receiving end of 4 pins as 485 bus switching circuits.It is the output signal receiving end of 485 bus switching circuits, defeated Signal receiving end is connect with governor circuit out.
Further, the invention also includes environment to acquire sensor group.The environment acquisition sensor group includes with RS- The sensor of 232 interfaces output is simulated with the sensor of CAN bus output, with the sensor and output of RS-485 interface output The sensor of signal.The letter of the serial ports receiving end of three USART converting units and three sensors with RS-232 interface output Number transmitting terminal is separately connected.The serial ports transmitting terminal and three sensors exported with RS-232 interface of three USART converting units Signal receiving end be separately connected.The CAN high position data transmission end of CAN bus conversion circuit, CAN low data transmission end with The coffret connection of the sensor of CAN bus output.The 485 data transmission anode of 485 bus switching circuits, 485 data pass Defeated negative terminal is connect with the coffret of the sensor exported with RS-485 interface.Eight analog quantitys of each modulus conversion chip are defeated The signal output pin for entering the sensor that pin exports analog signal with eight is respectively connected with.
Further, it includes the 4th switching power source chip that the 5V number, which adopts power supply module,.4th switching power source chip is adopted With the isolation DC-DC switching power source chip of model WRB2405N.16 pins, the polar capacitor C11 of 4th switching power source chip Positive connection be followed by external 24V voltage.1 pin of the 4th switching power source chip and the cathode of polar capacitor C11 connect general Logical ground wire.The anode connection of 9 pins of the 4th switching power source chip, one end of resistance R8, polar capacitor C12 is used as 5V number later Adopt the 5V power output end 5V of power supply module.10 pins of the 4th switching power source chip, the cathode of polar capacitor C12, resistance R8 The other end meet digital ground wire VDD.Remaining pin of 4th switching power source chip is hanging.
It includes electrical level transferring chip, the model LM1117 of electrical level transferring chip that the 3.3V number, which adopts power supply module,.Electricity 3 pins of flat conversion chip connect the anode of polar capacitor C65, one end of capacitor C66 and 5V number adopt power supply module+5V power supply it is defeated Outlet 5V.1 pin of electrical level transferring chip, the cathode of polar capacitor C65, capacitor C66 the other end connect common ground wire.Level 2 pins and 4 pins of conversion chip connect after the anode of polar capacitor C67, one end of capacitor C68 and resistance R37 and connection The 3.3V power output end 3V3 of power supply module is adopted as 3.3V number.The other end and Light-emitting diode LED 14 of resistance R37 is just Pole connection.The cathode of the cathode of polar capacitor C67, the other end of capacitor C68 and Light-emitting diode LED 14 connects common ground wire.
Further, it includes reference power supply chip and amplifier chip that the 2.5V reference voltage, which provides module,.Benchmark electricity Source chip uses the reference voltage chip of model REF5025.Operational amplifier chip is transported using the accurate of model OPA376 Put chip.2 pins of reference power supply chip are connect with one end of one end of inductance L3, the anode of polar capacitor C22, capacitor C23. Another termination 5V number of inductance L3 adopts the+5V power output end 5V of power supply module.The cathode of polar capacitor C22, capacitor C23 it is another 4 pins of one end and reference power supply chip connect common ground wire.6 pins of reference power supply chip are connect with one end of resistance R14. 5 pins of reference power supply chip are connect with one end of capacitor C24.Another termination of capacitor C24 commonly line.Resistance R14's is another One end is connect with 3 pins of one end of capacitor C25 and amplifier chip.Another termination of capacitor C25 commonly line.Amplifier chip 5 pins are connect with+5V power output end the 5V that power supply module is adopted in one end of capacitor C26 and 5V number.Another termination of capacitor C26 is general Logical ground wire.One end of the equal connecting resistance R15 of 4 pins and 1 pin of amplifier chip.Another termination capacitor C27 and capacitor of resistance R15 One end of C28 provides the reference voltage output end of module as 2.5V reference voltage.2 pins of amplifier chip, capacitor C27 and The other end of capacitor C28 connects common ground wire.
Further, the power circuit is including further including 12V sensor power supply module and 5V sensor power supply module. The 12V sensor power supply module includes first switch power supply chip.First switch power supply chip uses model XL4016 DC-DC switching power source chip.5 pins of first switch power supply chip connect the anode of polar capacitor C1, one end of capacitor C2, electricity Hold one end and the outside 24V voltage of C3.The cathode of polar capacitor C1 and the other end of capacitor C2 connect common ground wire.Capacitor C3's 4 pins of another termination first switch power supply chip.3 pins of first switch power supply chip connect one end of inductance L1, Schottky The cathode of diode D1 and Schottky diode D2.The anode of the other end of inductance L1 and polar capacitor C4, capacitor C5 one end, One end connection of one end, resistance R1 of resistance R2.The anode of the other end sending and receiving optical diode LED1 of resistance R2.Resistance R1's is another One end of one terminating resistor R3.One end of another terminating resistor R4 of resistance R3 and 2 pins of first switch power supply chip.First 1 pin of switching power source chip, the anode of Schottky diode D1, the anode of Schottky diode D2, polar capacitor C4's is negative Pole, the other end of capacitor C5, the cathode of Light-emitting diode LED 1, resistance R4 the other end connect common ground wire.Resistance R1, resistance Ratio between the sum of resistance value of R3 and the resistance value of R4 is 26:3.
The 5V sensor power supply module includes second switch power supply chip.Second switch power supply chip uses model The DC-DC switching power source chip of XL4016.5 pins of second switch power supply chip connect the anode of polar capacitor C6, capacitor C7 One end, one end of capacitor C8 and outside 24V voltage.The cathode of polar capacitor C6 and the other end of capacitor C7 connect common ground wire. 4 pins of another termination first switch power supply chip of capacitor C8.3 pins of second switch power supply chip connect the one of inductance L2 The cathode at end, the cathode of Schottky diode D3 and Schottky diode D4.The other end and polar capacitor C9 of inductance L2 is just One end connection of pole, one end of capacitor C10, one end of resistance R6, resistance R5.The other end sending and receiving optical diode LED2 of resistance R6 Anode.One end of another terminating resistor R7 of resistance R5 and 2 pins of second switch power supply chip.First switch power supply chip 1 pin, the anode of Schottky diode D3, the anode of Schottky diode D4, the cathode of polar capacitor C9, capacitor C10's The other end, the cathode of Light-emitting diode LED 2, resistance R7 the other end connect common ground wire.The ratio between the resistance value of resistance R5 and R4 For 10:3.24.
Further, the governor circuit includes main control chip.Main control chip is using model STM32F103ZET6's Single-chip microcontroller.One end of 25 pin connecting resistance R30 of main control chip, capacitor 47 and key switch KEY1.Another termination of resistance R30 3.3V number adopts the 3.3V power output end of power supply module.The other end of capacitor C47 and key switch KEY1 connect common ground wire.It is main It controls 6 pins of chip, 72 pins, 108 pins, 144 pins, 39 pins, 17 pins, 52 pins, 62 pins, 84 pins, 95 draw Foot, 121 pins, 131 pins and 32 pins meet capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, capacitor C64, one end of capacitor C50 and 3.3V number adopt confession The 3.3V power output end 3V3 of electric module.33 pins of main control chip connect one end of capacitor 51 and capacitor 52.Main control chip 138 pins, 48 pins, 71 pins, 107 pins, 143 pins, 38 pins, 16 pins, 51 pins, 61 pins, 83 pins, 94 are drawn Foot, 120 pins, 130 pins, 30 pins, 31 pins, capacitor 51, capacitor 52, capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, capacitor C64, capacitor C50 The other end connects common ground wire.23 pins of main control chip connect one end of capacitor C49 and crystal oscillator Y3, and 24 pins connect capacitor C48's The other end of one end and crystal oscillator Y3.The other end of capacitor C48 and capacitor C49 connect common ground wire.
40 pins of the main control chip, 41 pins, 42 pins, the first chip select terminal of 43 pins and A/D converter circuit, One clock end, the first transmitting terminal, the first receiving end are separately connected.73 pins, 74 pins, 75 pins, 76 pins of main control chip It is separately connected with the second chip select terminal of A/D converter circuit, second clock end, the second transmitting terminal, the second receiving end.The master control core First output serial ports receiving end of the USART conversion circuit of 101,102 pins and USART conversion circuit of piece, the first output string Mouth transmitting terminal is separately connected.Second output of the USART conversion circuit of 37,36 pins and USART conversion circuit of main control chip Serial ports receiving end, the second output serial ports transmitting terminal are separately connected.70,69 pins of main control chip and USART conversion circuit The third output serial ports receiving end of USART conversion circuit, third output serial ports transmitting terminal are separately connected.Main control chip 139, 140 pins are separately connected with the output signal receiving end of CAN bus conversion circuit, output signal transmitting terminal.Main control chip 10, Output signal receiving end, the output signal receiving end of 11 pins and 485 bus switching circuits are separately connected.
Further, 34 pins of the main control chip, 35 pins, 19 pins, 20 pins, 46 pins, 47 pins, 26 are drawn Foot, 27 pins, 28 pins, 29 pins, 44 pins, 45 pins are as 12 analog input pins for being respectively main control chip The signal output pin for the sensor for exporting analog signal with 12 is respectively connected with.
Further, the invention also includes file management circuits.The file management circuit includes SD card seat.SD card seat 7 pins, 8 pins, 1 pin, 2 pins, 3 pins and resistance R42, resistance R41, resistance R40, resistance R39, resistance R38 one End is separately connected, and the first data terminal of respectively file management circuit, the second data terminal, third data terminal, the 4th data terminal, Order end.5 pins of SD card seat are the clock bus transmission end of file management circuit.Resistance R38, resistance R39, resistance R40, electricity Resistance R41, the other end of resistance R42,4 pins of SD card seat and the one end capacitor C69 connect the 3.3V electricity that 3.3V number adopts power supply module Source output terminal.6,10,11,12 pins of SD card seat and the other end of capacitor C69 connect common ground wire.The of file management circuit One data terminal, the second data terminal, third data terminal, the 4th data terminal, order end and main control chip 98,99,111,112 pins It is separately connected.113,116 pins of the clock bus transmission end of file management circuit, order end and main control chip are separately connected.
Further, the RTC clock circuit includes clock chip.The model DS3231SN of clock chip.Clock 2 pins of chip connect the 3.3V power output end that capacitor C70, capacitor C71, one end of resistance R43 and 3.3V number adopt power supply module 3V3.The other end of capacitor C70 and capacitor C71 connect common ground wire.The other end of 3 pin connecting resistance R43 of clock chip.When 5 pins, 6 pins, 7 pins and 8 pins of clock chip connect common ground wire.15,16 pins and resistance R45, electricity of clock chip One end of resistance R44 is separately connected.The other end of resistance R45 and resistance R44 connect 3.3V number adopt power supply module 3.3V power supply it is defeated Outlet.14 pins of clock chip connect one end of capacitor C72 and the anode of button cell BT1.9 pins of clock chip, 10 are drawn Foot, 11 pins, 12 pins, 13 pins, the other end of capacitor C72 and button cell BT1 cathode connect common ground wire.Clock core I2C clock end of 16 pins of piece as RTC clock circuit, I2C control terminal of 15 pins as RTC clock circuit, 3 pins are made For the clock signal output terminal of RTC clock circuit.The clock signal output terminal of RTC clock circuit, I2C clock end, I2C control terminal It is separately connected with 132,136,137 pins of main control chip.
Further, the invention also includes LCD screen control circuits.The LCD screen control circuit includes LCD screen.LCD screen Model ILI9341.29 pins of LCD screen connect the+5V power output end that 5V number adopts power supply module, and 31 pins connect 3.3V number and adopt confession The 3.3V power output end 3V3 of electric module, 1 pin, 30 pins, 32 pins connect common ground wire.18 pins of LCD screen, 17 are drawn Foot, 16 pins, 15 pins, 14 pins, 13 pins, 12 pins, 11 pins, 10 pins, 9 pins, 8 pins, 7 pins, 6 pins, 5 Pin, 4 pins, 85 pins of 3 pins and main control chip, 86 pins, 114 pins, 115 pins, 58 pins, 59 pins, 60 are drawn Foot, 63 pins, 64 pins, 65 pins, 66 pins, 67 pins, 68 pins, 77 pins, 78 pins, 79 pins are separately connected.LCD 2 pins of screen, 22 pins, 19 pins, 20 pins, 21 pins, 23 pins, 26 pins, 25 pins, 24 pins, 27 draw 28 pins 126 pins of foot and main control chip, 91 pins, 127 pins, 118 pins, 119 pins, 1 pin, 117 pins, 18 pins, 49 Pin, 22 pins, 21 pins are separately connected.
The invention has the advantages that:
1, the present invention supports the common acquisition of multiple sensor signal
2, the present invention supports I2C communications protocol, RS-232 communications protocol, CAN bus communications protocol, RS-485 bus The common input of protocol data and analog signal amount.
3, the present invention is able to record the time, therefore can guarantee the real-time of data, makes data and the geography actual time of acquisition Hook.
4, implementation of the invention access is uploaded to server by the packing of GPRS signal with observation, final data-signal End.
5, the present invention can be realized the preservation and backup of data by the function of file management.
6, the present invention reads data when facilitating scientific research personnel's fieldwork by liquid crystal display real-time display sensing data.
Detailed description of the invention
Fig. 1 is system block diagram of the invention；
Fig. 2 a is the circuit diagram of 12V sensor power supply module in the present invention；
Fig. 2 b is the circuit diagram of 5V sensor power supply module in the present invention；
Fig. 2 c is the circuit diagram that 5V number adopts power supply module in the present invention；
Fig. 2 d is the circuit diagram that 3.3V number adopts power supply module in the present invention；
Fig. 2 e provides the circuit diagram of module for 2.5V reference voltage in the present invention；
Fig. 3 a is the circuit diagram of A/D converter circuit in the present invention；
Fig. 3 b is the circuit diagram of USART conversion circuit in the present invention；
Fig. 3 c is the circuit diagram of CAN bus conversion circuit in the present invention；
Fig. 3 d is the circuit diagram of 485 bus switching circuits in the present invention；
Fig. 4 is the circuit diagram of file management circuit in the present invention；
Fig. 5 is the circuit diagram of RTC clock circuit in the present invention；
Fig. 6 a is the circuit diagram of main control chip power pack in governor circuit in the present invention；
Fig. 6 b is the circuit diagram of main control chip control section in governor circuit in the present invention；
Fig. 7 is the circuit diagram of LCD screen control circuit in the present invention.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described.
As shown in Figure 1, a kind of Wetland Environment monitoring number adopts circuit, including power circuit 1, environment acquisition sensor group 2, biography Sensor signal conversion circuit 3, file management circuit 4, governor circuit 5, RTC clock circuit 6 and LCD screen control circuit 7.Environment is adopted Collection sensor group 2 includes with the sensor of RS-232 interface output, with the sensor, defeated with RS-485 interface of CAN bus output The sensor of sensor and output analog signal out.Sensor in environment acquisition sensor group 2 is for detecting temperature, wet Degree, rainfall, wind speed, wind direction, net radiation value, light quantity subvalue, the soil moisture, Soil salinity, soil moisture content, soil heat flux Value.Sensor signal conversion circuit 3 includes USART conversion circuit 3-1, CAN bus conversion circuit 3-2,485 bus switching circuits 3-3 and A/D converter circuit 3-4.Passed through in USART conversion circuit 3-1 with the sensor and governor circuit 5 of RS-232 interface output Serial port chip connection.Pass through the CAN in CAN bus conversion circuit 3-2 with the sensor and governor circuit 5 of CAN bus output Bus driver/receiver connection.Pass through 485 bus switching circuits with the sensor and governor circuit 5 of RS-485 interface output 485 bus drivers/receiver connection in 3-3.The sensor and governor circuit 5 for exporting analog signal pass through A/D converter circuit Modulus conversion chip connection in 3-4.File management circuit 4 received by SD card and store governor circuit 5 transmission come environment Data.RTC clock circuit 6 provides clock signal by clock chip for the main control chip in governor circuit 5.LCD screen control electricity Road 7 is connected with main control module, and acquires the collected data of sensor group 2 by LCD screen display environment.
The power circuit 1 includes that 12V sensor power supply module 1-1,5V sensor power supply module 1-2,5V number adopt confession Electric module 1-3,3.3V number adopts power supply module 1-4 and 2.5V reference voltage and provides module 1-5.12V sensor power supply module 1-1, 5V sensor power supply module 1-2 is that environment acquires each sensor power supply in sensor group 2.5V number adopts power supply module 1-3,3.3V number Adopting power supply module 1-4 is sensor signal conversion circuit 3, file management circuit 4, governor circuit 5, RTC clock circuit 6 and LCD Shield control circuit 7 to power.2.5V reference voltage provides module 1-5 and provides reference voltage for A/D converter circuit 3-4.
As shown in Figure 2 a, 12V sensor power supply module 1-1 includes first switch power supply chip XL1.First switch power supply core Piece XL1 uses the DC-DC switching power source chip of model XL4016.5 pins of first switch power supply chip XL1 connect polar capacitor The anode of C1, one end of capacitor C2, one end of capacitor C3 and outside 24V voltage.The cathode of polar capacitor C1 and capacitor C2's is another One end meets common ground wire GND.4 pins of another termination first switch power supply chip XL1 of capacitor C3.First switch power supply core 3 pins of piece XL1 connect the cathode of one end of inductance L1, Schottky diode D1 and Schottky diode D2.Inductance L1's is another End senses after connecting with one end of the anode of polar capacitor C4, one end of capacitor C5, one end of resistance R2, resistance R1 as 12V The 12V power supply output end VCC12 of device power supply module 1-1.The anode of the other end sending and receiving optical diode LED1 of resistance R2.Resistance R1 Another terminating resistor R3 one end.One end of another terminating resistor R4 of resistance R3 and the 2 of first switch power supply chip XL1 are drawn Foot.1 pin of first switch power supply chip XL1, the anode of Schottky diode D1, the anode of Schottky diode D2, polarity The cathode of capacitor C4, the other end of capacitor C5, the cathode of Light-emitting diode LED 1, resistance R4 the other end connect common ground wire GND.Ratio of the sum of the resistance value of resistance R1, resistance R3 between the resistance value of R4 is 26:3.
As shown in Figure 2 b, 5V sensor power supply module 1-2 includes second switch power supply chip XL2.Second switch power supply core Piece XL2 uses the DC-DC switching power source chip of model XL4016.5 pins of second switch power supply chip XL2 connect polar capacitor The anode of C6, one end of capacitor C7, one end of capacitor C8 and outside 24V voltage.The cathode of polar capacitor C6 and capacitor C7's is another One end meets common ground wire GND.4 pins of another termination first switch power supply chip XL1 of capacitor C8.Second switch power supply core 3 pins of piece XL2 connect the cathode of one end of inductance L2, the cathode of Schottky diode D3 and Schottky diode D4.Inductance L2 The other end connect with one end of the anode of polar capacitor C9, one end of capacitor C10, one end of resistance R6, resistance R5 after conduct The 5V power supply output end VCC5 of 5V sensor power supply module 1-2.The anode of the other end sending and receiving optical diode LED2 of resistance R6.Electricity Hinder one end of another terminating resistor R7 of R5 and 2 pins of second switch power supply chip XL2.The 1 of first switch power supply chip XL1 Pin, the anode of Schottky diode D3, the anode of Schottky diode D4, the cathode of polar capacitor C9, capacitor C10's is another End, the cathode of Light-emitting diode LED 2, resistance R7 the other end meet common ground wire GND.The ratio between the resistance value of resistance R5 and R4 For 10:3.24.
As shown in Figure 2 c, it includes the 4th switching power source chip WRB that 5V number, which adopts power supply module 1-3,.4th switching power source chip WRB uses the isolation DC-DC switching power source chip of model WRB2405N.16 pins of 4th switching power source chip WRB, polarity The positive connection of capacitor C11 is followed by external 24V voltage.1 pin of 4th switching power source chip WRB and polar capacitor C11's Cathode meets common ground wire GND.9 pins of 4th switching power source chip WRB, one end of resistance R8, polar capacitor C12 anode + 5V power output end the 5V of power supply module 1-3 is adopted after connection as 5V number.10 pins of 4th switching power source chip WRB, pole The cathode of property capacitor C12, the other end of resistance R8 meet digital ground wire VDD.Remaining pin of 4th switching power source chip WRB is equal Vacantly.
As shown in Figure 2 d, it includes electrical level transferring chip UP1, the type of electrical level transferring chip UP1 that 3.3V number, which adopts power supply module 1-4, Number be LM1117.3 pins of electrical level transferring chip UP1 connect the anode of polar capacitor C65, one end of capacitor C66 and 5V number and adopt confession + 5V power output end the 5V of electric module 1-3.1 pin of electrical level transferring chip UP1, the cathode of polar capacitor C65, capacitor C66 The other end meets common ground wire GND.2 pins and 4 pins of electrical level transferring chip UP1 connect the anode of polar capacitor C67, capacitor Adopt the 3.3V power output end 3V3 of power supply module 1-4 as 3.3V number later with connecting in one end of C68 and resistance R37.Resistance The other end of R37 is connect with the anode of Light-emitting diode LED 14.The other end and hair of the cathode of polar capacitor C67, capacitor C68 The cathode of optical diode LED14 meets common ground wire GND.
As shown in Figure 2 e, it includes reference power supply chip REF1 and amplifier chip OP1 that 2.5V reference voltage, which provides module 1-5,. Reference power supply chip REF1 uses the reference voltage chip of model REF5025.Operational amplifier chip OP1 uses model The accurate amplifier chip of OPA376.One end of 2 pins of reference power supply chip REF1 and inductance L3, polar capacitor C22 anode, One end of capacitor C23 connects.Another termination 5V number of inductance L3 adopts the+5V power output end 5V of power supply module 1-3.Polar capacitor 4 pins of the cathode of C22, the other end of capacitor C23 and reference power supply chip REF1 meet common ground wire GND.Reference power supply core 6 pins of piece REF1 are connect with one end of resistance R14.5 pins of reference power supply chip REF1 are connect with one end of capacitor C24. Another termination of capacitor C24 commonly line GND.The other end of resistance R14 draws with one end of capacitor C25 and the 3 of amplifier chip OP1 Foot connection.Another termination of capacitor C25 commonly line GND.5 pins of amplifier chip OP1 are adopted with one end of capacitor C26 and 5V number + 5V power output end 5V the connection of power supply module 1-3.Another termination of capacitor C26 commonly line GND.The 4 of amplifier chip OP1 One end of pin and the equal connecting resistance R15 of 1 pin.Another termination capacitor C27 of resistance R15 and one end of capacitor C28, as 2.5V The reference voltage output end REF2V5 of reference voltage offer module 1-5.2 pins, capacitor C27 and the capacitor C28 of amplifier chip OP1 The other end meet common ground wire GND.Remaining pin of reference power supply chip REF1 meets common ground wire GND.
As shown in Figure 3a, A/D converter circuit 3-4 includes two AD conversion units.AD conversion unit includes modulus conversion chip AD1.Modulus conversion chip AD1 uses 24 modulus conversion chips of model ADS1256.1 pin of modulus conversion chip AD1 + 5V power output end the 5V of power supply module 1-3 is adopted with the anode of polar capacitor C29, one end of capacitor C30 and 5V number.Polarity electricity The other end of the cathode and capacitor C30 that hold C29 meets common ground wire GND.4 pins of modulus conversion chip AD1 connect 2.5V benchmark Voltage provides the reference voltage output end REF2V5 of module 1-5, and 3 pins connect common ground wire GND, 6 pins, 7 pins, 8 pins, 9 Pin, 10 pins, 11 pins, 12 pins, eight analog input pins that 13 pins are modulus conversion chip AD1.Modulus turns The signal output pin for changing the eight analog input pins and eight analog output sensors of chip AD1 is respectively connected with.Mould 5 pins and 2 pins of number conversion chip AD1 meet common ground wire GND, and 14 pins meet the 3.3V that 3.3V number adopts power supply module 1-4 Power output end 3V3.24 pins, 23 pins, 22 pins, 21 pins and the resistance R16 of modulus conversion chip AD1, resistance R17, Resistance R18, resistance R19 one end be separately connected.20 pins of modulus conversion chip AD1 connect common ground wire GND, 19 pins and crystalline substance One end of vibration Y1 and one end connection of capacitor C33,18 pins are connect with one end of the other end of crystal oscillator Y1 and capacitor C34.Capacitor The other end of C33 and capacitor C34 meet common ground wire GND.17 pins of modulus conversion chip AD1 meet common ground wire GND.Modulus 15 pins and 16 pins of conversion chip AD1 connect one end of capacitor C31, the anode of polar capacitor C32 and 3.3V number and adopt power supply The 3.3V power output end 3V3 of module 1-4.The other end of capacitor C31, the cathode of polar capacitor C32 meet common ground wire GND.
Resistance R16 in first AD conversion unit, resistance R17, resistance R18, resistance R19 the other end be respectively AD conversion The first clock end SPI1_SCK of circuit 3-4, the first receiving end SPI1_MOSI, the first transmitting terminal SPI1_MISO, first choosing Hold SPI1_NSS.Resistance R16 in second AD conversion unit, resistance R17, resistance R18, resistance R19 the other end be respectively AD Second clock end SPI2_SCK, the second receiving end SPI2_MOSI, the second transmitting terminal SPI2_MISO, second of conversion circuit 3-4 Chip select terminal SPI2_NSS.
As shown in Figure 3b, USART conversion circuit 3-1 includes three USART converting units.USART converting unit includes string Mouth chip RSM1.Serial ports isolating chip RSM1 uses the isolated serial port chip of model RSM232.1 pin of serial port chip RSM1 One end of connecting resistance R11, the anode of polar capacitor C16, one end of capacitor C17, transient supression diode TVS2 cathode and 5V Number adopts the+5V power output end 5V of power supply module 1-3.4 pins of serial port chip RSM1 are the output of USART conversion circuit 3-1 Serial ports receiving end.3 pins of serial port chip RSM1 are the output serial ports transmitting terminal of USART conversion circuit 3-1.Resistance R11's is another The anode of one end sending and receiving optical diode LED3.2 pins of serial port chip RSM1, the cathode of Light-emitting diode LED 3, polar capacitor The positive connection of the cathode of C16, the other end of capacitor C17, transient supression diode TVS2 is followed by digitally line VDD.Serial ports The cathode and self-recovery fuse RT1 of 6 pins of chip RSM1 and transient supression diode TVS1, transient supression diode TVS3 One end connection.The anode of 7 pins of serial port chip RSM1 and transient supression diode TVS1, transient supression diode TVS4 The connection of one end of cathode and self-recovery fuse RT2.8 pins and transient supression diode TVS3, transition of serial port chip RSM1 Inhibit one end connection of the anode, resistance RM1 and capacitor CM1 of diode TVS4.The other end of self-recovery fuse RT1 and lightning protection The first terminals of pipe GDT1 connect.That end of self-recovery fuse RT1 far from serial port chip RSM1 is USART converting unit Serial ports receiving end RIN1.The other end of self-recovery fuse RT2 is connect with the second terminals of anti-thunder tube GDT1.Self- recoverage insurance That end of silk RT2 far from serial port chip RSM1 is the serial ports transmitting terminal TOUT1 of USART converting unit.Resistance RM1, capacitor CM1 The third terminals of the other end and anti-thunder tube GDT1 meet digital ground wire VDD.Remaining pin floating of serial port chip RSM1
4 pins of serial port chip RSM1 are respectively the first defeated of USART conversion circuit 3-1 in three USART converting units Serial ports receiving end RXD1, the second output serial ports receiving end RXD2, third export serial ports receiving end RXD3 out.Three USART conversions 3 pins of serial port chip RSM1 are respectively the first output serial ports transmitting terminal TXD1, second of USART conversion circuit 3-1 in unit Export serial ports transmitting terminal TXD2, third exports serial ports transmitting terminal TXD3.The serial ports receiving end RIN1 of three USART converting units with The signal sending end of three sensors with RS-232 interface output is separately connected.The serial ports of three USART converting units is sent End TOUT1 and the signal receiving end of three sensors with RS-232 interface output are separately connected.
As shown in Figure 3c, CAN bus conversion circuit 3-2 includes CAN bus driver/receiver CT1 and the suppression of the first surge Molding block SP1.CAN bus driver/receiver CT1 uses the isolated can bus transceiving chip of model CTM1051M.First Surge suppression modules SP1 uses the signal surge suppressor of model SP00S12.Draw the 4 of CAN bus driver/receiver CT1 Foot connects the anode of polar capacitor C41, one end of capacitor C42, the cathode of transient supression diode TVS13, Light-emitting diode LED 6 Anode and 5V number adopt the+5V power output end 5V of power supply module 1-3.The cathode of polar capacitor C41, capacitor C42 the other end, The anode of transient supression diode TVS13, the cathode of Light-emitting diode LED 6 and CAN bus driver/receiver CT1 3 draw Foot meets digital ground wire VDD.7 pins of CAN bus driver/receiver CT1 connect 5 pins of the first surge suppression modules SP1, 6 pins connect 8 pins of the first surge suppression modules SP1.5 pins, the first Surge suppression of CAN bus driver/receiver CT1 6 pins and 7 pins of module SP1 meet digital ground wire VDD.2 pins and 3 pins and resistance of first surge suppression modules SP1 One end of R24 and capacitor C43 are connected and meet digital ground wire VDD.The other end of resistance R24 and capacitor C43 connect 5V number and adopt power supply + 5V power output end the 5V of module 1-3.4 pins of first surge suppression modules SP1 are the CAN of CAN bus conversion circuit 3-2 High position data transmission end CAN_H.1 pin of first surge suppression modules SP1 is the CAN lower-order digit of CAN bus conversion circuit 3-2 According to transmission end CAN_L.CAN high position data transmission end CAN_H, the CAN low data transmission end of CAN bus conversion circuit 3-2 CAN_L is connect with the coffret of the sensor using CAN interface transmission.1 pin of CAN bus driver/receiver CT1 is made For the output signal receiving end CAN_RX of CAN bus conversion circuit 3-2, output of 2 pins as CAN bus conversion circuit 3-2 Signal sending end CAN_TX.
As shown in Figure 3d, 485 bus switching circuit 3-3 include that 485 bus drivers/receiver RSM4 and the second surge press down Molding block SP2.485 bus drivers/receiver RSM4 use model RSM485 485 bus transceiving chip of isolation, second Surge suppression modules SP2 uses the signal surge suppressor of model SP00S12.485 bus drivers/receiver RSM4 1 Pin connects cathode, the light emitting diode of the anode of polar capacitor C44, one end of capacitor C45, transient supression diode TVS14 The anode and 5V number of LED7 adopts the+5V power output end 5V of power supply module 1-3.The cathode of polar capacitor C44, capacitor C45 it is another One end, the anode of transient supression diode TVS14, the cathode of Light-emitting diode LED 7 and 485 bus drivers/receiver RSM4 2 pins meet digital ground wire VDD.One end of 485 bus drivers/receiver RSM4,7 pin connecting resistance R25,8 pins connect 5 pins of one end of resistance R26 and the second surge suppression modules SP2, the other end of 9 pin connecting resistance R25 and the suppression of the second surge 8 pins of molding block SP2.485 bus drivers/receiver RSM4,10 pins, the other end of resistance R26, the suppression of the second surge 6 pins and 7 pins of molding block SP2 meet digital ground wire VDD.2 pins and 3 pins of second surge suppression modules SP2 with One end of resistance R27 and capacitor C46 are connected, and meet digital ground wire VDD.The other end of resistance R27 and capacitor C46 connect 5V number and adopt + 5V power output end the 5V of power supply module 1-3.
485 data that 4 pins of second surge suppression modules SP2 are 485 bus switching circuit 3-3 transmit negative terminal 485_B. 485 data that 1 pin of second surge suppression modules SP2 is 485 bus switching circuit 3-3 transmit anode 485_A.485 buses 485 data transmission anode 485_A, 485 data transmission negative terminal 485_B and the sensing using the transmission of 485 interfaces of conversion circuit 3-3 The coffret of device connects.Output of 485 bus drivers/receiver RSM4,3 pins as 485 bus switching circuit 3-3 Signal receiving end RXD.Output signal of 485 bus drivers/receiver RSM4,4 pins as 485 bus switching circuit 3-3 Receiving end TXD.
As shown in figure 4, file management circuit 4 includes SD card seat SD1.7 pins of SD card seat SD1,8 pins, 1 pin, 2 are drawn Foot, 3 pins and resistance R42, resistance R41, resistance R40, resistance R39, resistance R38 one end be separately connected, and respectively file Manage the first data terminal SDIO_D0, the second data terminal SDIO_D1, the third data terminal SDIO_D2, the 4th data terminal of circuit 4 SDIO_D3, order end SDIO_CMD.5 pins of SD card seat SD1 are the clock bus transmission end SDIO_ of file management circuit 4 CK.Resistance R38, resistance R39, resistance R40, resistance R41, the other end of resistance R42, SD card seat SD1 4 pins and capacitor C69 One end meet the 3.3V power output end 3V3 that 3.3V number adopts power supply module 1-4.6 pins of SD card seat SD1,10 pins, 11 are drawn The other end of foot, 12 pins and capacitor C69 meets common ground wire GND.Remaining pin of SD card seat SD1 is hanging.
As shown in figure 5, RTC clock circuit 6 includes clock chip U2.The model DS3231SN of clock chip U2.Clock 2 pins of chip U2 connect capacitor C70, capacitor C71, one end of resistance R43 and 3.3V number adopt power supply module 1-4 3.3V power supply it is defeated Outlet 3V3.The other end of capacitor C70 and capacitor C71 meet common ground wire GND.The 3 pin connecting resistance R43's of clock chip U2 The other end.5 pins, 6 pins, 7 pins and 8 pins of clock chip U2 meet common ground wire GND.Draw the 15 of clock chip U2 Foot, 16 pins and resistance R45, resistance R44 one end be separately connected.The other end of resistance R45 and resistance R44 connect 3.3V number and adopt The 3.3V power output end 3V3 of power supply module 1-4.14 pins of clock chip U2 meet one end and the button cell BT1 of capacitor C72 Anode.9 pins, 10 pins, 11 pins, 12 pins, 13 pins, the other end of capacitor C72 and the button electricity of clock chip U2 The cathode of pond BT1 meets common ground wire GND.I2C clock end I2C2_ of 16 pins of clock chip as RTC clock circuit 6 SCL, I2C control terminal I2C2_SDA of 15 pins as RTC clock circuit 6, clock signal of 3 pins as RTC clock circuit 6 Output end RTC.
As shown in Figure 6 a, governor circuit 5 includes main control chip U1.Main control chip U1 uses model STM32F103ZET6 Single-chip microcontroller.One end of the 25 pin connecting resistance R30 of main control chip U1, capacitor 47 and key switch KEY1.Resistance R30's is another Termination 3.3V number adopts the 3.3V power output end 3V3 of power supply module 1-4.The other end of capacitor C47 and key switch KEY1 connect Common ground wire GND.6 pins, 72 pins, 108 pins, 144 pins, 39 pins, 17 pins, 52 pins, 62 of main control chip U1 Pin, 84 pins, 95 pins, 121 pins, 131 pins and 32 pins meet capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, capacitor C64, capacitor C50 One end and 3.3V number adopt the 3.3V power output end 3V3 of power supply module 1-4.33 pins of main control chip U1 connect capacitor 51 and capacitor 52 one end.138 pins of main control chip U1,48 pins, 71 pins, 107 pins, 143 pins, 38 pins, 16 pins, 51 are drawn Foot, 61 pins, 83 pins, 94 pins, 120 pins, 130 pins, 30 pins, 31 pins, capacitor 51, capacitor 52, capacitor C53, Capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, capacitor C64, capacitor C50 the other end meet common ground wire GND.23 pins of main control chip U1 connect capacitor C49 and crystal oscillator One end of Y3,24 pins connect one end of capacitor C48 and the other end of crystal oscillator Y3.The other end of capacitor C48 and capacitor C49 connect general Logical ground wire GND.
As shown in Figure 6 b, 40 pins of main control chip U1,41 pins, 42 pins, 43 pins and A/D converter circuit 3-4 the One chip select terminal SPI1_NSS, the first clock end SPI1_SCK, the first transmitting terminal SPI1_MISO, the first receiving end SPI1_MOSI point It does not connect.Second chip select terminal of 73 pins of main control chip U1,74 pins, 75 pins, 76 pins and A/D converter circuit 3-4 SPI2_NSS, second clock end SPI2_SCK, the second transmitting terminal SPI2_MISO, the second receiving end SPI2_MOSI are separately connected.
101 pins, 102 pins and the first of the USART conversion circuit 3-1 of USART conversion circuit 3-1 of main control chip U1 Output serial ports receiving end RXD1, the first output serial ports transmitting terminal TXD1 are separately connected.37 pins of main control chip U1,36 pins with The second output serial ports receiving end RXD2, the second output serial ports transmitting terminal of the USART conversion circuit 3-1 of USART conversion circuit 3-1 TXD2 is separately connected.The USART conversion circuit 3-1's of 70 pins of main control chip U1,69 pins and USART conversion circuit 3-1 Third output serial ports receiving end RXD3, third output serial ports transmitting terminal TXD3 are separately connected.139 pins of main control chip U1,140 Output signal receiving end CAN_RX, the output signal transmitting terminal CAN_TX of pin and CAN bus conversion circuit 3-2 are separately connected. 10 pins of main control chip U1, the output signal receiving end RXD of 11 pins and 485 bus switching circuit 3-3, output signal receive End TXD is separately connected.
98 pins of main control chip U1,99 pins, 111 pins, 112 pins and file management circuit 4 the first data terminal SDIO_D0, the second data terminal SDIO_D1, third data terminal SDIO_D2, the 4th data terminal SDIO_D3, order end SDIO_CMD It is separately connected.113 pins of main control chip U1, the clock bus transmission end SDIO_CK of 116 pins and file management circuit 4, life End SDIO_CMD is enabled to be separately connected.
132 pins of main control chip U1,136 pins, 137 pins and RTC clock circuit 6 clock signal output terminal RTC, I2C clock end I2C2_SCL, I2C control terminal I2C2_SDA is separately connected.
34 pins of main control chip U1,35 pins, 19 pins, 20 pins, 46 pins, 47 pins, 26 pins, 27 pins, 28 pins, 29 pins, 44 pins, 45 pins are as 12 analog input pin (ADC123_ for being respectively main control chip U1 IN0、ADC123_IN1、ADC3_IN5、ADC3_IN6、ADC12_IN8、ADC12_IN9、ADC123_IN10、ADC123_IN11、 ADC123_IN12, ADC123_IN13, ADC12_IN14, ADC12_IN15), the signal with 12 analog output sensors Output pin is respectively connected with.In conjunction with 16 analog input pins of A/D converter circuit 3-4；The present invention can receive 28 The analog signal of road sensor.
As shown in fig. 7, the LCD screen control circuit 7 includes LCD screen I1.The model ILI9341 of LCD screen I1.LCD screen 29 pins of I1 meet the+5V power output end 5V that 5V number adopts power supply module 1-3, and 31 pins connect 3.3V number and adopt power supply module 1-4's 3.3V power output end 3V3,1,30,32 pins meet common ground wire GND.18 pins, 17 pins, 16 pins, 15 of LCD screen I1 Pin, 14 pins, 13 pins, 12 pins, 11 pins, 10 pins, 9 pins, 8 pins, 7 pins, 6 pins, 5 pins, 4 pins, 3 Pin respectively as LCD screen control circuit 7 16 data transmission terminals, with 85 pins of main control chip U1,86 pins, 114 pins, 115 pins, 58 pins, 59 pins, 60 pins, 63 pins, 64 pins, 65 pins, 66 pins, 67 pins, 68 are drawn Foot, 77 pins, 78 pins, 79 pins are separately connected.2 pins, 28 pins, 22 pins, 19 pins, 20 pins, 21 of LCD screen I1 Pin, 23 pins, 26 pins, 25 pins, 24 pins, 27 pins are transmitted respectively as ten orders of LCD screen control circuit 7 End is drawn with 126 pins of main control chip U1,91 pins, 127 pins, 118 pins, 119 pins, 1 pin, 117 pins, 18 Foot, 49 pins, 22 pins, 21 pins are separately connected.Remaining pin of LCD screen I1 and main control chip U1 is hanging.

Claims (10)

1. a kind of Wetland Environment monitoring number adopts circuit, including when power circuit, sensor signal conversion circuit, governor circuit, RTC Clock circuit and LCD screen control circuit；It is characterized by: the sensor signal conversion circuit include USART conversion circuit, CAN bus conversion circuit, 485 bus switching circuits and A/D converter circuit；RTC clock circuit is governor circuit by clock chip Interior main control chip provides clock signal；The power circuit include that 5V number adopts power supply module, 3.3V number adopts power supply module and 2.5V reference voltage provides module；5V number adopts power supply module, 3.3V number adopts power supply module as sensor signal conversion circuit, master control Circuit and RTC clock circuit power supply；2.5V reference voltage provides module and provides reference voltage for A/D converter circuit；
The A/D converter circuit includes two AD conversion units；AD conversion unit includes modulus conversion chip；Analog-to-digital conversion core Piece uses 24 modulus conversion chips of model ADS1256；The anode of 1 pin of modulus conversion chip and polar capacitor C29, One end of capacitor C30 and 5V number adopt the+5V power output end of power supply module；The cathode of polar capacitor C29 and capacitor C30's is another End connects common ground wire；4 pins of modulus conversion chip connect 2.5V reference voltage and provide the reference voltage output end of module, and 3 draw Foot connects common ground wire, and 6 pins, 7 pins, 8 pins, 9 pins, 10 pins, 11 pins, 12 pins, 13 pins are analog-to-digital conversion core Eight analog input pins of piece；5 pins and 2 pins of modulus conversion chip connect common ground wire, and 14 pins connect 3.3V number Adopt the 3.3V power output end 3V3 of power supply module；24 pins, 23 pins, 22 pins, 21 pins and the resistance of modulus conversion chip R16, resistance R17, resistance R18, resistance R19 one end be separately connected；20 pins of modulus conversion chip connect common ground wire, and 19 draw Foot is connect with one end of one end of crystal oscillator Y1 and capacitor C33, and one end of the other end and capacitor C34 of 18 pins and crystal oscillator Y1 connects It connects；The other end of capacitor C33 and capacitor C34 connect common ground wire；17 pins of modulus conversion chip connect common ground wire；Modulus turns 15 pins and 16 pins for changing chip connect one end of capacitor C31, the anode of polar capacitor C32 and 3.3V number and adopt power supply module 3.3V power output end 3V3；The other end of capacitor C31, the cathode of polar capacitor C32 connect common ground wire；
Resistance R16 in first AD conversion unit, resistance R17, resistance R18, resistance R19 the other end be respectively A/D converter circuit The first clock end, the first receiving end, the first transmitting terminal, the first chip select terminal；Resistance R16, resistance in second AD conversion unit R17, resistance R18, resistance R19 the other end be respectively the second clock end of A/D converter circuit, the second receiving end, second send End, the second chip select terminal；When the first clock end of A/D converter circuit, the first receiving end, the first transmitting terminal, the first chip select terminal, second Zhong Duan, the second receiving end, the second transmitting terminal, the second chip select terminal are connect with governor circuit；
The USART conversion circuit includes three USART converting units；USART converting unit includes serial port chip；Serial ports every Off-chip piece uses the isolated serial port chip of model RSM232；One end of 1 pin connecting resistance R11 of serial port chip, polar capacitor The anode of C16, one end of capacitor C17, the cathode of transient supression diode TVS2 and 5V number adopt the+5V power supply output of power supply module End；4 pins of serial port chip are the output serial ports receiving end of USART conversion circuit；3 pins of serial port chip are USART conversion The output serial ports transmitting terminal of circuit；The anode of the other end sending and receiving optical diode LED3 of resistance R11；2 pins, the hair of serial port chip The cathode of optical diode LED3, the cathode of polar capacitor C16, the other end of capacitor C17, transient supression diode TVS2 anode Connection is followed by digitally line；6 pins of serial port chip and transient supression diode TVS1, transient supression diode TVS3 it is negative Pole and the connection of one end of self-recovery fuse RT1；Anode, the transition of 7 pins and transient supression diode TVS1 of serial port chip Inhibit one end connection of the cathode and self-recovery fuse RT2 of diode TVS4；8 pins of serial port chip and two pole of transient supression One end connection of pipe TVS3, the anode of transient supression diode TVS4, resistance RM1 and capacitor CM1；Self-recovery fuse RT1's The other end is connect with the first terminals of anti-thunder tube GDT1；That end of self-recovery fuse RT1 far from serial port chip turns for USART Change the serial ports receiving end of unit；The other end of self-recovery fuse RT2 is connect with the second terminals of anti-thunder tube GDT1；Self- recoverage That end of fuse RT2 far from serial port chip is the serial ports transmitting terminal TOUT1 of USART converting unit；Resistance RM1, capacitor CM1 The third terminals of the other end and anti-thunder tube GDT1 connect digital ground wire；
4 pins of serial port chip are respectively that the first output serial ports of USART conversion circuit receives in three USART converting units End, the second output serial ports receiving end, third export serial ports receiving end；3 pins of serial port chip point in three USART converting units Not Wei USART conversion circuit first output serial ports transmitting terminal, second output serial ports transmitting terminal, third export serial ports transmitting terminal； First output serial ports receiving end of USART conversion circuit, the second output serial ports receiving end, third export serial ports receiving end, first Output serial ports transmitting terminal, the second output serial ports transmitting terminal, third output serial ports transmitting terminal are connect with governor circuit；
The CAN bus conversion circuit includes CAN bus driver/receiver and the first surge suppression modules；CAN bus is driven Dynamic device/receiver uses the isolated can bus transceiving chip of model CTM1051M；First surge suppression modules use model The signal surge suppressor of SP00S12；4 pins of CAN bus driver/receiver connect the anode of polar capacitor C41, capacitor One end of C42, the cathode of transient supression diode TVS13, the anode of Light-emitting diode LED 6 and 5V number adopt the+5V of power supply module Power output end；The cathode of polar capacitor C41, the other end of capacitor C42, the positive of transient supression diode TVS13, luminous two The cathode of pole pipe LED6 and 3 pins of CAN bus driver/receiver connect digital ground wire；CAN bus driver/receiver 7 pins connect 5 pins of the first surge suppression modules, 6 pins connect 8 pins of the first surge suppression modules；CAN bus driving 5 pin of device/receiver, 6 pins of the first surge suppression modules and 7 pins connect digital ground wire；First surge suppression modules 2 pins and 3 pins be connected with one end of resistance R24 and capacitor C43 and connect digital ground wire；Resistance R24's and capacitor C43 is another End connects the+5V power output end that 5V number adopts power supply module；4 pins of the first surge suppression modules are CAN bus conversion circuit CAN high position data transmission end；1 pin of the first surge suppression modules is that the CAN low data of CAN bus conversion circuit transmits End；Output signal receiving end of 1 pin of CAN bus driver/receiver as CAN bus conversion circuit, 2 pin conducts The output signal transmitting terminal of CAN bus conversion circuit；The output signal receiving end of CAN bus conversion circuit, output signal are sent End is connect with governor circuit；
485 bus switching circuits include 485 bus drivers/receiver and the second surge suppression modules；485 buses are driven Dynamic device/receiver uses the 485 bus transceiving chip of isolation of model RSM485, and the second surge suppression modules use model The signal surge suppressor of SP00S12；485 bus drivers/receiver, 1 pin connects the anode of polar capacitor C44, capacitor One end of C45, the cathode of transient supression diode TVS14, the anode of Light-emitting diode LED 7 and 5V number adopt the+5V of power supply module Power output end；The cathode of polar capacitor C44, the other end of capacitor C45, the positive of transient supression diode TVS14, luminous two The cathode of pole pipe LED7 and 485 bus drivers/receiver, 2 pin connect digital ground wire；485 bus drivers/receiver 7 pin connecting resistance R25 one end, one end of 8 pin connecting resistance R26 and 5 pins of the second surge suppression modules, 9 pins connect 8 pins of the other end of resistance R25 and the second surge suppression modules；485 bus drivers/receiver, 10 pin, resistance R26 The other end, the second surge suppression modules 6 pins and 7 pins connect digital ground wire；2 pins of the second surge suppression modules and 3 pins are connected with one end of resistance R27 and capacitor C46, and connect digital ground wire；The other end of resistance R27 and capacitor C46 connect 5V number adopts the+5V power output end of power supply module；4 pins of the second surge suppression modules are 485 numbers of 485 bus switching circuits According to transmission negative terminal；1 pin of the second surge suppression modules is that 485 data of 485 bus switching circuits transmit anode；485 buses Output signal receiving end of 3 pins of driver/receiver as 485 bus switching circuits；485 bus drivers/receiver Output signal receiving end of 4 pins as 485 bus switching circuits；It is the output signal receiving end of 485 bus switching circuits, defeated Signal receiving end is connect with governor circuit out.
2. a kind of Wetland Environment monitoring number according to claim 1 adopts circuit, it is characterised in that: further include that environment acquisition passes Sensor group；The environment acquisition sensor group includes with the sensor of RS-232 interface output, the sensing exported with CAN bus Device, the sensor exported with RS-485 interface and the sensor for exporting analog signal；The serial ports of three USART converting units receives It holds and is separately connected with the signal sending end of three sensors with RS-232 interface output；The serial ports of three USART converting units The signal receiving end of transmitting terminal and three sensors with RS-232 interface output is separately connected；The CAN of CAN bus conversion circuit High position data transmission end, CAN low data transmission end are connect with the coffret of the sensor exported with CAN bus；485 buses The 485 data transmission anode of conversion circuit, 485 data transmit the coffret of negative terminal with the sensor exported with RS-485 interface Connection；The signal of eight analog input pins of each modulus conversion chip and the sensor of eight output analog signals exports Pin is respectively connected with.
3. a kind of Wetland Environment monitoring number according to claim 1 adopts circuit, it is characterised in that: the 5V number adopts power supply Module includes the 4th switching power source chip；4th switching power source chip switchs electricity using the isolation DC-DC of model WRB2405N Source chip；The positive connection of 16 pins, polar capacitor C11 of 4th switching power source chip is followed by external 24V voltage；4th opens 1 pin of powered-down source chip and the cathode of polar capacitor C11 connect common ground wire；9 pins, the resistance of 4th switching power source chip + 5V power output end the 5V of power supply module is adopted after one end of R8, the anode connection of polar capacitor C12 as 5V number；4th opens 10 pins of powered-down source chip, the cathode of polar capacitor C12, resistance R8 the other end meet digital ground wire VDD；4th switch electricity Remaining pin of source chip is hanging；
It includes electrical level transferring chip, the model LM1117 of electrical level transferring chip that the 3.3V number, which adopts power supply module,；Level turns 3 pins for changing chip connect the+5V power output end that the anode of polar capacitor C65, one end of capacitor C66 and 5V number adopt power supply module 5V；1 pin of electrical level transferring chip, the cathode of polar capacitor C65, capacitor C66 the other end connect common ground wire；Level conversion 2 pins and 4 pins of chip connect conduct after the anode of polar capacitor C67, one end of capacitor C68 and resistance R37 and connection 3.3V number adopts the 3.3V power output end 3V3 of power supply module；The other end of resistance R37 and the anode of Light-emitting diode LED 14 connect It connects；The cathode of the cathode of polar capacitor C67, the other end of capacitor C68 and Light-emitting diode LED 14 connects common ground wire.
4. a kind of Wetland Environment monitoring number according to claim 1 adopts circuit, it is characterised in that: the 2.5V benchmark electricity It includes reference power supply chip and amplifier chip that pressure, which provides module,；Reference power supply chip uses the reference voltage of model REF5025 Chip；Operational amplifier chip uses the accurate amplifier chip of model OPA376；2 pins and inductance L3 of reference power supply chip One end, the anode of polar capacitor C22, capacitor C23 one end connection；Another termination 5V number of inductance L3 adopt power supply module+ 5V power output end 5V；4 pins of the cathode of polar capacitor C22, the other end of capacitor C23 and reference power supply chip connect commonly Ground wire；6 pins of reference power supply chip are connect with one end of resistance R14；5 pins of reference power supply chip and the one of capacitor C24 End connection；Another termination of capacitor C24 commonly line；The 3 of the other end of resistance R14 and one end of capacitor C25 and amplifier chip Pin connection；Another termination of capacitor C25 commonly line；5 pins of amplifier chip and one end of capacitor C26 and 5V number adopt power supply + 5V power output end 5V the connection of module；Another termination of capacitor C26 commonly line；4 pins and 1 pin of amplifier chip are equal One end of connecting resistance R15；Another termination capacitor C27 of resistance R15 and one end of capacitor C28 are provided as 2.5V reference voltage The reference voltage output end of module；The other end of 2 pins of amplifier chip, capacitor C27 and capacitor C28 connects common ground wire.
5. a kind of Wetland Environment monitoring number according to claim 1 adopts circuit, it is characterised in that: the power circuit packet Include further includes 12V sensor power supply module and 5V sensor power supply module；The 12V sensor power supply module is opened including first Powered-down source chip；First switch power supply chip uses the DC-DC switching power source chip of model XL4016；First switch power supply core 5 pins of piece connect the anode of polar capacitor C1, one end of capacitor C2, one end of capacitor C3 and outside 24V voltage；Polar capacitor C1 Cathode and the other end of capacitor C2 connect common ground wire；4 pins of another termination first switch power supply chip of capacitor C3；The 3 pins of one switching power source chip connect the cathode of one end of inductance L1, Schottky diode D1 and Schottky diode D2；Inductance The other end of L1 is connect with one end of the anode of polar capacitor C4, one end of capacitor C5, one end of resistance R2, resistance R1；Resistance The anode of the other end sending and receiving optical diode LED1 of R2；One end of another terminating resistor R3 of resistance R1；The other end of resistance R3 One end of connecting resistance R4 and 2 pins of first switch power supply chip；1 pin of first switch power supply chip, Schottky diode The anode of D1, the anode of Schottky diode D2, the cathode of polar capacitor C4, the other end of capacitor C5, Light-emitting diode LED 1 Cathode, resistance R4 the other end connect common ground wire；The sum of resistance value of resistance R1, resistance R3 is between the resistance value of R4 Ratio is 26:3；
The 5V sensor power supply module includes second switch power supply chip；Second switch power supply chip uses model The DC-DC switching power source chip of XL4016；5 pins of second switch power supply chip connect the anode of polar capacitor C6, capacitor C7 One end, one end of capacitor C8 and outside 24V voltage；The cathode of polar capacitor C6 and the other end of capacitor C7 connect common ground wire； 4 pins of another termination first switch power supply chip of capacitor C8；3 pins of second switch power supply chip connect the one of inductance L2 The cathode at end, the cathode of Schottky diode D8 and Schottky diode D4；The other end and polar capacitor C9 of inductance L2 is just One end connection of pole, one end of capacitor C10, one end of resistance R6, resistance R5；The other end sending and receiving optical diode LED2 of resistance R6 Anode；One end of another terminating resistor R7 of resistance R5 and 2 pins of second switch power supply chip；First switch power supply chip 1 pin, the anode of Schottky diode D3, the anode of Schottky diode D4, the cathode of polar capacitor C9, capacitor C10's The other end, the cathode of Light-emitting diode LED 2, resistance R7 the other end connect common ground wire；The ratio between the resistance value of resistance R5 and R4 For 10:3.24.
6. a kind of Wetland Environment monitoring number according to claim 1 adopts circuit, it is characterised in that: the governor circuit packet Include main control chip；Main control chip uses the single-chip microcontroller of model STM32F103ZET6；25 pin connecting resistance R30 of main control chip, One end of capacitor 47 and key switch KEY1；Another termination 3.3V number of resistance R30 adopts the 3.3V power output end of power supply module； The other end of capacitor C47 and key switch KEY1 connect common ground wire；6,72,108,144 pins of main control chip, 39 pins, 17 pins, 52 pins, 62 pins, 84 pins, 95 pins, 121 pins, 131 pins and 32 pins meet capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, Capacitor C64, one end of capacitor C50 and 3.3V number adopt the 3.3V power output end of power supply module；33 pins of main control chip connect electricity Hold one end of 51 and capacitor 52；138 pins, 48 pins, 71 pins, 107 pins, 143 pins, 38 pins, 16 of main control chip Pin, 51 pins, 61 pins, 83 pins, 94 pins, 120 pins, 130 pins, 30 pins, 31 pins, capacitor 51, capacitor 52, Capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, capacitor C58, capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, capacitor C64, capacitor C50 the other end connect common ground wire；23 pins of main control chip connect capacitor C49 and crystalline substance One end of vibration Y3,24 pins connect one end of capacitor C48 and the other end of crystal oscillator Y3；The other end of capacitor C48 and capacitor C49 connect Common ground wire；
When 40 pins of the main control chip, 41 pins, 42 pins, the first chip select terminal of 43 pins and A/D converter circuit, first Zhong Duan, the first transmitting terminal, the first receiving end are separately connected；73 pins, 74 pins, 75 pins, 76 pins and the AD of main control chip Second chip select terminal of conversion circuit, second clock end, the second transmitting terminal, the second receiving end are separately connected；The main control chip First output serial ports receiving end of the USART conversion circuit of 101 pins, 102 pins and USART conversion circuit, the first output are gone here and there Mouth transmitting terminal is separately connected；37 pins, 36 pins and the second of the USART conversion circuit of USART conversion circuit of main control chip Output serial ports receiving end, the second output serial ports transmitting terminal are separately connected；70 pins, 69 pins and the USART of main control chip are converted The third output serial ports receiving end of the USART conversion circuit of circuit, third output serial ports transmitting terminal are separately connected；Main control chip 139 pins, 140 pins and the output signal receiving end of CAN bus conversion circuit, output signal transmitting terminal are separately connected；Master control 10 pins of chip, output signal receiving end, the output signal receiving end of 11 pins and 485 bus switching circuits are separately connected.
7. a kind of Wetland Environment monitoring number according to claim 6 adopts circuit, it is characterised in that: the 34 of the main control chip Pin, 35 pins, 19 pins, 20 pins, 46 pins, 47 pins, 26 pins, 27 pins, 28 pins, 29 pins, 44 pins, 45 Letter of the pin as 12 analog input pins for being respectively main control chip and the sensor of 12 output analog signals Number output pin is respectively connected with.
8. a kind of Wetland Environment monitoring number according to claim 6 adopts circuit, it is characterised in that: the invention also includes files Manage circuit；The file management circuit includes SD card seat；7 pins of SD card seat, 8 pins, 1 pin, 2 pins, 3 pins with Resistance R42, resistance R41, resistance R40, resistance R39, resistance R38 one end be separately connected, and respectively file management circuit First data terminal, the second data terminal, third data terminal, the 4th data terminal, order end；5 pins of SD card seat are file management electricity The clock bus transmission end on road；Resistance R38, resistance R39, resistance R40, resistance R41, the other end of resistance R42, SD card seat 4 One end of pin and capacitor C69 connect the 3.3V power output end that 3.3V number adopts power supply module；6 pins of SD card seat, 10 pins, The other end of 11 pins, 12 pins and capacitor C69 connects common ground wire；First data terminal of file management circuit, the second data End, third data terminal, the 4th data terminal, order end and 98 pins of main control chip, 99 pins, 111 pins, 112 pins difference Connection；The clock bus transmission end of file management circuit, 113 pins at order end and main control chip, 116 pins are separately connected.
9. a kind of Wetland Environment monitoring number according to claim 6 adopts circuit, it is characterised in that: the RTC clock electricity Road includes clock chip；The model DS3231SN of clock chip；2 pins of clock chip meet capacitor C70, capacitor C71, resistance One end of R43 and 3.3V number adopt the 3.3V power output end 3V3 of power supply module；The other end of capacitor C70 and capacitor C71 connect general Logical ground wire；The other end of 3 pin connecting resistance R43 of clock chip；5 pins of clock chip, 6 pins, 7 pins and 8 pins are equal Connect common ground wire；15 pins of clock chip, one end of 16 pins and resistance R45, resistance R44 are separately connected；Resistance R45 and electricity The other end of resistance R44 connects the 3.3V power output end that 3.3V number adopts power supply module；14 pins of clock chip connect capacitor C72's The anode of one end and button cell BT1；9 pins of clock chip, 10 pins, 11 pins, 12 pins, 13 pins, capacitor C72 The cathode of the other end and button cell BT1 connect common ground wire；When I2C of 16 pins of clock chip as RTC clock circuit Zhong Duan, I2C control terminal of 15 pins as RTC clock circuit, clock signal output terminal of 3 pins as RTC clock circuit； The clock signal output terminal of RTC clock circuit, I2C clock end, 132 pins of I2C control terminal and main control chip, 136 pins, 137 pins are separately connected.
10. a kind of Wetland Environment monitoring number according to claim 6 adopts circuit, it is characterised in that: the invention also includes LCD Shield control circuit；The LCD screen control circuit includes LCD screen；The model ILI9341 of LCD screen；29 pins of LCD screen meet 5V Number adopts the+5V power output end of power supply module, and 31 pins meet the 3.3V power output end 3V3 that 3.3V number adopts power supply module, and 1 draws Foot, 30 pins, 32 pins connect common ground wire；18 pins of LCD screen, 17 pins, 16 pins, 15 pins, 14 pins, 13 are drawn Foot, 12 pins, 11 pins, 10 pins, 9 pins, 8 pins, 7 pins, 6 pins, 5 pins, 4 pins, 3 pins and main control chip 85 pins, 86 pins, 114 pins, 115 pins, 58 pins, 59 pins, 60 pins, 63 pins, 64 pins, 65 pins, 66 are drawn Foot, 67 pins, 68 pins, 77 pins, 78 pins, 79 pins are separately connected；2 pins of LCD screen, 28 pins, 22 pins, 19 are drawn Foot, 20 pins, 21 pins, 23 pins, 26 pins, 25 pins, 24 pins, 126 pins of 27 pins and main control chip, 91 are drawn Foot, 127 pins, 118 pins, 119 pins, 1 pin, 117 pins, 18 pins, 49 pins, 22 pins, 21 pins are separately connected.
CN201910232278.4A 2019-03-26 2019-03-26 A kind of Wetland Environment monitoring number adopts circuit Pending CN110068364A (en)

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CN113448275A (en) * 2021-07-30 2021-09-28 重庆市农业科学院 Embedded control greenhouse control system
CN116761296A (en) * 2023-08-16 2023-09-15 菏泽学院 Solar street lamp controller for adjusting brightness of LED (light-emitting diode) based on time and battery voltage

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CN209764155U (en) * 2019-03-26 2019-12-10 杭州电子科技大学 Wetland environment monitoring data acquisition circuit

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CN113448275A (en) * 2021-07-30 2021-09-28 重庆市农业科学院 Embedded control greenhouse control system
CN116761296A (en) * 2023-08-16 2023-09-15 菏泽学院 Solar street lamp controller for adjusting brightness of LED (light-emitting diode) based on time and battery voltage
CN116761296B (en) * 2023-08-16 2023-11-03 菏泽学院 Solar street lamp controller for adjusting brightness of LED (light-emitting diode) based on time and battery voltage

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Application publication date: 20190730