A wireless ad hoc network node device for obtaining and sharing agricultural machinery information

Abstract

The present invention provides a wireless ad hoc network node device for obtaining and sharing agricultural machinery operation information. The node device mainly includes a power module, an STM32F1 processor module, an RS232 module, a CAN module and a Lora wireless module. The power module provides 3.3V and 5V power supply for the entire node. The STM32F1 processor module is connected to the RS232 module and the Lora wireless module through a UART port to realize serial communication and wireless networking. The STM32F1 processor module is connected to the CAN module through a CAN port to realize CAN communication. The node collects signals of agricultural machinery positioning and operation information through RS232 and CAN communication, and connects to an external host computer or other terminal through the Lora wireless module to share the information in an ad hoc network, providing underlying support for agricultural machinery navigation operations, operation and maintenance systems, etc.

Description

Technical Field

[0001] The invention belongs to the field of agriculture, and in particular relates to a wireless self-organizing network node device for obtaining and sharing agricultural machinery information. Background Art

[0002] Real-time, stable and reliable wireless communication is the basis for the operation of multiple machines, such as cooperative operation, follow-up operation and interactive operation during agricultural machinery operation. The wireless ad hoc network nodes are responsible for collecting the operation information of each agricultural machine and transmitting and sharing the operation information through the wireless ad hoc network. Summary of the invention

[0003] The present invention aims to provide a wireless ad hoc network node device for obtaining and sharing agricultural machinery information, which is used for collecting and wirelessly transmitting agricultural machinery information. The node can collect agricultural machinery operation information through RS232 and CAN communication methods, and output and share the collected information through Lora wireless networking.

[0004] The technical solution of the present invention is:

[0005] A wireless ad hoc network node device for obtaining and sharing agricultural machinery information comprises a processor chip, a serial port module, a CAN module, a Lora wireless networking module and a power module; wherein the power module is respectively connected to the above chips and modules, and the processor chip is respectively connected to the serial port module, the CAN module and the Lora wireless networking module.

[0006] The power module is connected to an external 9-36V power supply, outputs a 5V power supply connected to the CAN module and the Lora module wireless network, and outputs a 3.3V power supply connected to the serial port module;

[0007] The circuit of the power module includes a first step-down circuit and a second step-down circuit; the first step-down circuit includes: an external 9-36V power supply is connected to a power chip U3, and an output end of the power chip U3 outputs a 5V power supply; the second step-down circuit includes: an input end of a power chip U4 is connected to a 5V power supply at an output end of the first step-down circuit, and is connected to ground after being connected in parallel with capacitors C7 and C8; an output end of the power chip U4 outputs a 3.3V power supply, and is connected to ground after being connected in parallel with capacitors C3 and C4.

[0008] The serial port module circuit connection relationship includes:

[0009] The VCC port of the serial port chip U2 is connected to the power supply of the output end of the power module, and the VCC port is also grounded through capacitor C2; the input end of the serial port chip U2 is connected to the processor chip, and the output end of the serial port chip U2 is one or more serial ports connected to external agricultural machinery equipment, and the output end of the serial port chip U2 is also grounded through an ESD protection diode.

[0010] The serial port module is a RS232 module or an RS485 module.

[0011] The CAN module circuit connection relationship includes:

[0012] The VCC port of the CAN chip U6 is connected to the power supply of the output end of the power module, and the VCC port is also grounded through a capacitor C11; the input end of the CAN chip U6 is connected to the processor chip, and the two output ports of the CAN chip U6 are connected to the CAN port of the external agricultural machinery equipment. The output port of the CAN chip U6 is also grounded through an ESD protection diode, and a resistor R1 is connected between the two output ports.

[0013] The Lora wireless networking module circuit connection relationship includes:

[0014] The VCC port of the Lora chip U8 is connected to the power supply of the output end of the power module, and the VCC port is also grounded through a capacitor C16; the input end of the Lora chip U8 is connected to the processor chip, and the Lora chip U8 is connected to the wireless interface of the external terminal wirelessly.

[0015] The C3 and C7 are tantalum capacitors, and C2, C4, C8, C11, and C16 are ceramic capacitors.

[0016] The beneficial effects of the present invention are as follows: the wireless ad hoc network node device can collect agricultural machinery operation information within a certain area and wirelessly transmit and share the information, providing underlying support for agricultural machinery navigation operations and operation and maintenance systems, while meeting the convenience and reliability of installation on agricultural machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a node structure of an embodiment of the present invention;

[0018] Figure 2 is a circuit diagram of a power module according to an embodiment of the present invention;

[0019] Figure 3 It is a circuit diagram of an STM32F1 processor according to an embodiment of the present invention;

[0020] Figure 4 It is a circuit diagram of an RS232 communication module according to an embodiment of the present invention;

[0021] Figure 5 is a circuit diagram of a CAN communication module according to an embodiment of the present invention;

[0022] Figure 6 is a circuit diagram of a Lora wireless module according to an embodiment of the present invention; DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation method of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the invention, so the present invention is not limited by the specific implementation disclosed below.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] Figure 1 It is a schematic diagram of the node device structure.

[0026] The power module converts the 9-36V voltage into 3.3V and 5V voltages. The 3.3V voltage powers the STM32F1 processor module and the RS232 module, and the 5V voltage powers the CAN module and the Lora wireless module. The STM32F1 processor module is connected to the RS232 module to realize the serial RS232 communication function. The STM32F1 processor module is connected to the CAN module to realize the CAN communication function. The STM32F1 processor module is connected to the Lora wireless module to realize the wireless networking function.

[0027] Figure 2 This is the power module circuit diagram.

[0028] The power module converts the 9-36V voltage into 5V, and then converts the 5V voltage into 3.3V voltage. U3 is a PB2405CD-3W chip, pin 1 is connected to the power ground, pin 2 is connected to the cathode of diode D1 and the cathode of diode D2, pin 6 outputs 5V, pin 7 outputs digital ground, and pins 3 and 8 are floating. Diode D1 is SMBJ33A, and the positive pole is connected to the power ground. Diode D2 is S2M, and the positive pole is connected to the 9-36V power input. C7 is a 10uF / 25V tantalum capacitor, the positive pole is connected to 5V, and the negative pole is connected to the digital ground. C8 is a 0.1uF ceramic capacitor, and the two ends are connected to 5V and DGND respectively. U4 is an AMS1117-3.3 chip, pin 3 is connected to 5V; pins 2 and 4 output 3.3V, and pin 1 is connected to the digital ground. C3 is a 22uF / 16V tantalum capacitor, the positive pole is connected to 3.3V, and the negative pole is connected to the digital ground. C4 is a 0.1uF ceramic capacitor, with both ends connected to 3.3V and digital ground respectively.

[0029] Figure 3 It is the circuit diagram of STM32F1 processor.

[0030] U9 is the STM32F1 chip, pin 1 is connected to 3.3V, pin 5 is connected to pin 1 of the passive crystal oscillator Y1, pin 6 is connected to pin 2 of the passive crystal oscillator Y1, and pin 12 is connected to resistor R2. Pin 13 is connected to 3.3V, pin 16 is connected to UART2-TX, pin 17 is connected to UART2-RX, pin 18 is connected to digital ground, pin 19 is connected to 3.3V, pin 31 is connected to digital ground, pin 32 is connected to 3.3V, pin 42 is connected to UART1-TX, pin 43 is connected to UART1-RX, pin 44 is connected to CAN1RX, pin 45 is connected to CAN1TX, pin 47 is connected to digital ground, pin 48 is connected to 3.3V, pin 51 is connected to UART4-TX, pin 52 is connected to UART4-RX, pin 63 is connected to digital ground, and pin 64 is connected to 3.3V. C12 is a 0.1uF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to 3.3V. C14 is a 10pF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 1 of the passive crystal oscillator Y1. C15 is a 10pF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 2 of the passive crystal oscillator Y1. R2 is a 0 ohm resistor, one end of which is connected to 3.3V and the other end is connected to pin 12 of U9. C17 is a 0.1uF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 19 of U9. C18 is a 0.1uF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 31 of U9. C13 is a 0.1uF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 48 of U9. C10 is a 0.1uF ceramic capacitor, one end of which is connected to the digital ground and the other end is connected to pin 64 of U9.

[0031] Figure 4 It is the circuit diagram of RS232 communication module.

[0032] U2 is a SP3232EEN chip. A 0.1uF ceramic capacitor C1 is connected between pins 1 and 3, a 0.1uF ceramic capacitor C5 is connected between pins 4 and 5, pin 9 is connected to UART1-RX, pin 10 is connected to UART1-TX, pin 11 is connected to UART2-TX, pin 12 is connected to UART2-RX, pin 15 is connected to digital ground, a 0.1uF ceramic capacitor C9 is connected between pins 6 and 15, pin 7 is connected to UART1-TX-PIN, pin 8 is connected to UART1-RX-PIN, pin 13 is connected to UART2-RX-PIN, pin 14 is connected to UART2-TX-PIN, and pin 16 is connected to 3.3V. C2 is a 0.1uF ceramic capacitor, one end of which is connected to pin 16 of U2 and the other end is connected to digital ground. C6 is a 0.1uF ceramic capacitor, one end of which is connected to pin 2 of U2 and the other end is connected to digital ground. U1 is an ESD protection diode PESD15VL2BT, with pin 1 connected to UART2-TX-PIN, pin 2 connected to UART2-RX-PIN, and pin 3 connected to digital ground. U5 is an ESD protection diode PESD15VL2BT, with pin 1 connected to UART1-RX-PIN, pin 2 connected to UART1-TX-PIN, and pin 3 connected to digital ground.

[0033] Figure 5 This is the circuit diagram of the CAN communication module.

[0034] U6 is a TJA1050 chip, with pin 1 connected to CAN1TX, pin 2 connected to digital ground, pin 3 connected to 5V, pin 4 connected to CAN1RX, pin 6 connected to CANL-PIN, pin 7 connected to CANH-PIN, and pin 8 connected to digital ground. C11 is a 0.1uF ceramic capacitor, one end of which is connected to pin 2 of U6 and the other end to pin 3 of U6. R1 is a 120 ohm resistor, one end of which is connected to pin 6 of U6 and the other end to pin 7 of U6. U7 is an ESD protection diode ESDCAN02-2BWY, pin 1 is connected to CANH-PIN, pin 2 is connected to CANL-PIN, and pin 3 is connected to digital ground.

[0035] Figure 6 This is the circuit diagram of the Lora wireless module.

[0036] U8 is a WH-L102-LP chip, with pin 3 connected to UART4-TX, pin 4 connected to UART4-RX, pin 6 connected to 5V, and pin 7 connected to digital ground. C16 is a 0.1uF ceramic capacitor, one end of which is connected to pin 6 of U8, and the other end is connected to pin 7 of U8. U8 wirelessly connects to the wireless interface of other external terminals for wireless communication.

[0037] The overall working mode of the circuit is: U9 realizes RS232 communication with U2 through UART1-TX, UART1-RX, UART2-TX and UART2-RX. U9 realizes CAN communication with U2 through CAN1TX and CAN1RX. The external agricultural machinery equipment is connected through RS232 and CAN communication to collect agricultural machinery operation information signals. U9 is connected to U8 through UART4-TX and UART4-RX to realize wireless networking transmission of operation information.

[0038] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should be regarded as within the scope of protection of the present invention.

Claims

1. A wireless ad hoc network node device for obtaining and sharing agricultural machinery information, characterized in that: It comprises a processor chip (1), a serial port module (2), a CAN module (3), a Lora wireless networking module (4) and a power module (5); wherein the power module (5) is connected to the above chips and modules respectively, and the processor chip (1) is connected to the serial port module (2), the CAN module (3) and the Lora wireless networking module (4) respectively; The circuit connection relationship of the serial port module (2) includes: the VCC port of the serial port chip U2 is connected to the power supply of the output end of the power module (5), and the VCC port is also grounded through a capacitor C2; the input end of the serial port chip U2 is connected to the processor chip (1), the output end of the serial port chip U2 is one or more serial ports connected to external agricultural machinery equipment, and the output end of the serial port chip U2 is also grounded through an ESD protection diode; The circuit connection relationship of the CAN module (3) includes: the VCC port of the CAN chip U6 is connected to the power supply of the output end of the power module (5), and the VCC port is also grounded through a capacitor C11; the input end of the CAN chip U6 is connected to the processor chip (1), the two output ports of the CAN chip U6 are connected to the CAN port of the external agricultural machinery equipment, the output port of the CAN chip U6 is also grounded through an ESD protection diode, and a resistor R1 is connected between the two output ports; The circuit connection relationship of the Lora wireless networking module (4) includes: the VCC port of the Lora chip U8 is connected to the power supply of the output end of the power module (5), and the VCC port is also grounded through a capacitor C16; the input end of the Lora chip U8 is connected to the processor chip (1), and the Lora chip U8 is connected to the wireless interface of the external terminal in a wireless manner.

2. A wireless ad hoc network node device for obtaining and sharing agricultural machinery information according to claim 1, characterized in that: The power module (5) is connected to an external 9-36V power supply, outputs a 5V power supply connected to the CAN module (3) and the Lora module wireless networking (4), and outputs a 3.3V power supply connected to the serial port module (2); The circuit of the power module (5) comprises a first step-down circuit and a second step-down circuit; The first step-down circuit includes: an external 9-36V power supply is connected to the power chip U3, and the output end of the power chip U3 outputs a 5V power supply; the second step-down circuit includes: the input end of the power chip U4 is connected to the 5V power supply at the output end of the first step-down circuit, and is also connected to ground after being connected in parallel with capacitors C7 and C8; the output end of the power chip U4 outputs a 3.3V power supply, and is also connected to ground after being connected in parallel with capacitors C3 and C4.

3. A wireless ad hoc network node device for obtaining and sharing agricultural machinery information according to claim 1, characterized in that: The serial port module (2) is a RS232 module or an RS485 module.

4. A wireless ad hoc network node device for obtaining and sharing agricultural machinery information according to any one of claims 2 and 3, characterized in that: C3 and C7 are tantalum capacitors, and C2, C4, C8, C11, and C16 are ceramic capacitors.

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