CN203982112U - Agricultural general-purpose simulation amount input acquisition module - Google Patents
Agricultural general-purpose simulation amount input acquisition module Download PDFInfo
- Publication number
- CN203982112U CN203982112U CN201420079718.XU CN201420079718U CN203982112U CN 203982112 U CN203982112 U CN 203982112U CN 201420079718 U CN201420079718 U CN 201420079718U CN 203982112 U CN203982112 U CN 203982112U
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- module
- microcontroller
- simulation amount
- communication module
- interface
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Abstract
The utility model discloses a kind of agriculture general-purpose simulation amount input acquisition module, include microcontroller, AI input interface, between the signal input part of microcontroller and AI input interface, be connected with ADC modular converter, microcontroller also arranges module with power module, RS485 address, RS485 communication module is connected, RS485 communication module includes electrical isolation module, RS485 interface, and RS485 communication module is for being connected with watch-dog.The utility model circuit structure is simple, the data that ADC modular converter is come biography are carried out analog to digital conversion, the SPI serial ports that digital quantity after conversion is carried by TLV2556 is sent to the main control chip STM32F103CBT6 of AI module after high speed photo coupling isolation, signal is processed stable, and signal transmission is unobstructed, quick.
Description
Technical field
The utility model relates generally to electronic circuit field, relates in particular to a kind of agriculture general-purpose simulation amount input acquisition module.
Background technology
AI module, i.e. analog input module, is responsible for the pre-service of the external analog sensor collection signal of system, conventionally AI modular design 8 tunnel input channels.General AI module has signal and processes unstable, signal and export the problem having some setbacks.
Utility model content
The utility model object is exactly the defect in order to make up prior art, and a kind of agriculture general-purpose simulation amount input acquisition module is provided.
The utility model is achieved through the following technical solutions:
Agricultural general-purpose simulation amount input acquisition module, it is characterized in that: include microcontroller, AI input interface, between the signal input part of microcontroller and AI input interface, be connected with ADC modular converter, microcontroller also arranges module with power module, RS485 address, RS485 communication module is connected, RS485 communication module includes electrical isolation module, RS485 interface, and RS485 communication module is for being connected with watch-dog; Power module provides the required voltage of each functions of modules and power demand, ADC modular converter passes the data of coming by AI input interface and carries out analog to digital conversion, digital quantity after conversion is sent to microcontroller and processes, then sends the data that collect to watch-dog by RS485 communication module.
Described agriculture general-purpose simulation amount input acquisition module, is characterized in that: the voltage input end of described power module can access the voltage within the scope of DC12～40V recommendation voltage DC24V.
Described agriculture general-purpose simulation amount input acquisition module, is characterized in that: the main control chip of described microcontroller adopts STM32F103CBT6.
Described agriculture general-purpose simulation amount input acquisition module, is characterized in that: described ADC modular converter adopts TLV2556.
The utility model has the advantages that:
The utility model circuit structure is simple, the data that ADC modular converter is come biography are carried out analog to digital conversion, the SPI serial ports that digital quantity after conversion is carried by TLV2556 is sent to the main control chip STM32F103CBT6 of AI module after high speed photo coupling isolation, signal is processed stable, and signal transmission is unobstructed, quick.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Fig. 2 a is the master chip power supply the principle figure to microcontroller and the bus-powered power module of RS485.
Fig. 2 b is the varying-voltage principle figure to the power module of microcontroller power supply.
Fig. 2 c is the varying-voltage principle figure of the power module bus-powered to RS485.
Fig. 3 a is the main circuit schematic diagram to the power module of AI module interface circuit power supply.
Fig. 3 b is the isolation output principle figure to the power module of AI module interface circuit power supply.
Fig. 3 c is the varying-voltage principle figure to the power module of A/D conversion chip power supply.
Fig. 4 a is the minimum system schematic diagram of microcontroller.
Fig. 4 b is the connection diagram of decoupling capacitor.
Fig. 5 a is the crystal oscillating circuit of the necessary peripheral circuit of microcontroller work.
Fig. 5 b is the dial-up dish on-off circuit of the necessary peripheral circuit of microcontroller work.
Fig. 5 c is the ground connection schematic diagram of the BOOT0 pin of microcontroller.
Fig. 5 d is the reset circuit of the necessary peripheral circuit of microcontroller work.
Fig. 5 e is the debugging interface schematic diagram of the necessary peripheral circuit of microcontroller work.
Fig. 6 is the interlock circuit figure of RS485 bus.
Fig. 7 is the interlock circuit figure of A/D conversion and the MCU isolation of AI module.
Fig. 8 is a wherein road interlock circuit figure of the collection of simulant signal part of AI module.
Embodiment
As shown in Figure 1, agricultural general-purpose simulation amount input acquisition module, include microcontroller 1, AI input interface 2, between the signal input part of microcontroller 1 and AI input interface 2, be connected with ADC modular converter 3, microcontroller 1 also arranges module 5 with power module 4, RS485 address, RS485 communication module 6 is connected, RS485 communication module 6 includes electrical isolation module 6-1, RS485 interface 6-2, and RS485 communication module 6 is for being connected with watch-dog 7; Power module 4 provides the required voltage of each functions of modules and power demand, ADC modular converter 3 passes the data of coming by AI input interface 2 and carries out analog to digital conversion, digital quantity after conversion is sent to microcontroller 1 and processes, then sends the data that collect to watch-dog 7 by RS485 communication module 6.
The voltage input end access DC24V voltage 8 of power module 4.The main control chip of microcontroller 1 adopts STM32F103CBT6.ADC modular converter 3 adopts TLV2556.
Figure 2 shows that to MCU and the bus-powered power module schematic diagram of RS485.The input of 24V DC voltage; after the diode 1N4007 for reverse power connection protection; the resettable fuse that is 0.5A through rated current; LM2595S-5.0 is converted to the input voltage of 24V the output voltage of 5V; the D502 on right side is power light; if power supply chip is normally worked, LED is bright.The 5V of output isolates the output of a road 5V through B0505LS-1W, and 485 bus-powered for giving, the electric capacity at two ends is for voltage stabilizing and decoupling.5V output before isolation is converted to 3.3V output through NVC1117-3.3 linear power supply chip again, and for powering to MCU, the electric capacity on both sides is for voltage stabilizing.
Figure 3 shows that the power module schematic diagram to the power supply of AI module interface circuit.The input of 24V DC voltage, the resettable fuse that is 0.5A through rated current, LM2595S-12 is converted to the input voltage of 24V the output voltage of 12V, and the D506 on right side is power light, if power supply chip is normally worked, LED is bright.The 12V of output isolates the output of a road 12V through B1212LS-1W, for giving the power supply of AI interface.12V after isolation obtains the output of 5V through LM2595S-5.0, for giving the power supply of A/D conversion chip.
Figure 4 shows that the main control chip STM32F103CBT6 microcontroller that this module is selected, C103, C104, C105, C106, C107 and C108 are the required decoupling capacitor of MCU.The necessary peripheral circuit of this chip operation is built, and comprises start-up mode configured port, download mouth, reset mouth and external crystal-controlled oscillation, will illustrate respectively below.
Figure 5 shows that the necessary peripheral circuit of STM32F103CBT6 microcontroller work.Crystal oscillating circuit for providing work clock to CPU and its real-time clock, is selected 8M external crystal-controlled oscillation, and OSC_IN is directly connected with the respective pins of MCU with OSC_OUT pin, and accurate clock signal is provided, and makes the high primary frequency of MCU can reach 72M; Dial-up dish on-off circuit has been selected 4 road toggle switchs, and every road has all connected the pull-up resistor of 10K, and user, by toggle switch is set, arranges the machine CAN module's address, realizes CAN communication; The BOOT0 pin of chip, by resistance eutral grounding, represents that user's flash memories is chosen as promoter region, starts by the Flash of chip self; Reset circuit adopts the mode that adds pull-up resistor on the NRST of MCU interface, there is no hand-reset function; Debugging interface adopts SWD interface, only needs 4 pins can complete download and the debugging of program.
Figure 6 shows that the interlock circuit of RS485 bus.ADuM1201 is digital optocoupler, can isolate 2 road signals, and for the signal isolation of MCU (3.3V) and outside RS485 equipment (5V), C401, C402, C403, C404 are decoupling capacitor.MAX485ESA is 485 bus transceivers, and 2,3 pin of this chip are for enabling control signal end, for the cut-out of controlling transmitter and transmission line be connected.2 20 Ω resistance R 405 and the R406 object of series connection are while preventing the side a and b short circuit of 485 buses; affect other devices communicatings in RS485 bus; TVS anti-thunder tube D402 in parallel is in the time occurring between two input ends and ground that transition is disturbed; electric discharge by anti-lightning strike pipe can be played certain protective effect; the terminal resistance R403 of 120 Ω in parallel, in order to the impedance matching of bus, can avoid signal reflex.In the time that this watch-dog is bus termination, by wire jumper short circuit, otherwise wire jumper remains open.The detection sensitivity of this transceiver is ± 200mV, in the time that A end differs in 200mV with B end, be output as uncertain, so added respectively and drawn and pull down resistor in the output of A end and B end, in the time that 485 main lines carry out information transmission without peripheral hardware, the A end of transceiver presents unique high level with B end, has so just avoided uncertain signal received.
Figure 7 shows that the interlock circuit of A/D conversion and the MCU isolation of AI module.TLV2556 is 12 high-precision differential type serial modulus conversion chips, this chip contains 11 road analog input channels and the 3 path built-ins pattern of testing oneself, by the SPI serial communication carrying, when work, switching rate can reach 200ksps, and REF02BU provides external reference voltage accurately for A/D conversion chip.Photoelectric isolated chip HCPL-2630 and 6N137 have guaranteed that A/D conversion chip the signal here can not cause interference via the internal MCU of portion of these control signal circuits.
Figure 8 shows that a wherein road interlock circuit of the collection of simulant signal part of AI module.Sensing interface circuit can receiver voltage type, resistor-type and 3 kinds of different signal types of current mode, can select by bouncing pilotage, then magnitude of voltage is sent into A/D change-over circuit.5V stabilivolt D301 does overvoltage protection, prevents that on-the-spot transducing signal input from having external interference simultaneously, and single order low pass RC active filter circuit can effectively filter high frequency interference.
Claims (4)
1. agriculture general-purpose simulation amount input acquisition module, it is characterized in that: include microcontroller, AI input interface, between the signal input part of microcontroller and AI input interface, be connected with ADC modular converter, microcontroller also arranges module with power module, RS485 address, RS485 communication module is connected, RS485 communication module includes electrical isolation module, RS485 interface, and RS485 communication module is for being connected with watch-dog; Power module provides the required voltage of each functions of modules and power demand, ADC modular converter passes the data of coming by AI input interface and carries out analog to digital conversion, digital quantity after conversion is sent to microcontroller and processes, then sends the data that collect to watch-dog by RS485 communication module.
2. agriculture general-purpose simulation amount input acquisition module according to claim 1, is characterized in that: the voltage input end access voltage range DC12～40V of described power module.
3. agriculture general-purpose simulation amount input acquisition module according to claim 1, is characterized in that: the main control chip of described microcontroller adopts STM32F103CBT6.
4. agriculture general-purpose simulation amount input acquisition module according to claim 1, is characterized in that: described ADC modular converter adopts TLV2556.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079718.XU CN203982112U (en) | 2014-02-25 | 2014-02-25 | Agricultural general-purpose simulation amount input acquisition module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079718.XU CN203982112U (en) | 2014-02-25 | 2014-02-25 | Agricultural general-purpose simulation amount input acquisition module |
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| Publication Number | Publication Date |
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| CN203982112U true CN203982112U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420079718.XU Expired - Fee Related CN203982112U (en) | 2014-02-25 | 2014-02-25 | Agricultural general-purpose simulation amount input acquisition module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107992143A (en) * | 2018-01-23 | 2018-05-04 | 徐工集团工程机械有限公司 | Multiplexing collection port circuit, controller, analog input acquisition method and system |
| CN110914772A (en) * | 2017-05-08 | 2020-03-24 | 株式会社Kmc | Interface device, interface unit for on/off data, interface unit for log data, and programmable logic controller system |
-
2014
- 2014-02-25 CN CN201420079718.XU patent/CN203982112U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110914772A (en) * | 2017-05-08 | 2020-03-24 | 株式会社Kmc | Interface device, interface unit for on/off data, interface unit for log data, and programmable logic controller system |
| CN107992143A (en) * | 2018-01-23 | 2018-05-04 | 徐工集团工程机械有限公司 | Multiplexing collection port circuit, controller, analog input acquisition method and system |
| CN107992143B (en) * | 2018-01-23 | 2024-03-01 | 江苏徐工国重实验室科技有限公司 | Multiplexing acquisition port circuit, controller, analog input acquisition method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170822 Address after: 211164 Nanjing, Jiangning District, the streets of the valley in the first cow Road, No. 69 Patentee after: Nanjing Dasheng baumber wisdom Agricultural Technology Co.,Ltd. Address before: 200072, seven floor, science and technology building, 149 extension Road, Shanghai, Zhabei District Patentee before: SHANGHAI BANGBO MODERN AGRISCIENCE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211164 No. 69 Niutou Avenue, Guli Street, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Dabang Intelligent Agricultural Technology Co.,Ltd. Address before: 211164 No. 69 Niutou Avenue, Guli Street, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Nanjing Dasheng baumber wisdom Agricultural Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190301 Address after: Room 120, Building 89, 149 Yanchang Road, Jing'an District, Shanghai 200072 Patentee after: SHANGHAI BANGBO MODERN AGRISCIENCE Co.,Ltd. Address before: 211164 No. 69 Niutou Avenue, Guli Street, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Nanjing Dabang Intelligent Agricultural Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20200225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |