Internet of things data acquisition and Beidou positioning transmission circuit

Abstract

The utility model provides an Internet of Things data acquisition and Beidou positioning transmission circuit, which relates to the technical field of Internet of Things and comprises a power supply control circuit, a 4G communication circuit, a GPS positioning circuit, an RS485 communication circuit, an information storage circuit and an MCU main control circuit, the power supply control circuit is electrically connected with the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit, the information storage circuit and the MCU main control circuit. The power supply control circuit supplies power to the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit, the information storage circuit and the MCU main control circuit. The 4G communication circuit is electrically connected with the MCU main control circuit, and the 4G communication circuit is used for transmitting a received server instruction to the MCU main control circuit and sending data collected by the MCU main control circuit to a server; the GPS positioning circuit is electrically connected with the MCU main control circuit, and the GPS positioning circuit is used for acquiring longitude and latitude positioning information and transmitting the longitude and latitude positioning information to the MCU main control circuit; the RS485 communication circuit is electrically connected with the MCU main control circuit, and the RS485 communication circuit is used for supporting communication between the MCU main control circuit and the detection equipment; the information storage circuit is electrically connected with the 4G communication circuit, and the information storage circuit is used for storing configuration information. According to the utility model, the positioning performance and the data transmission efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of Internet of Things, and in particular to an Internet of Things data collection and Beidou positioning transmission circuit. Background Art

[0002] The rapid development of IoT technology has made remote monitoring and data collection increasingly important and popular. In many application scenarios, accurate location information and real-time data collection are of great significance for improving operational efficiency, monitoring environmental conditions, and ensuring safety. Traditional IoT data transmission units are mainly responsible for collecting sensor data connected to them and uploading these data to the cloud platform through the network. However, these traditional DTUs often lack integrated positioning functions. Integrate positioning functions in DTUs and use this positioning to indicate the location of the sensors to which they are connected. Efficient data and location reporting through modern communication technologies (such as 4G networks) greatly enhances the application value and scenario adaptability of IoT systems.

[0003] A Chinese patent application with publication number CN207234832U discloses a communication circuit for an Internet of Things device, which includes a processor system, a wireless data communication module, a GPS geographic information module and an inter-board communication circuit; the processor system includes an embedded processor; the processor system is respectively connected to the wireless data communication module, the GPS geographic information module and the inter-board communication circuit; the inter-board communication circuit is used to realize communication between asynchronous serial interfaces. However, the above scheme only realizes location reading through the GPS geographic information module, but cannot meet the needs of modern Internet of Things applications for real-time and accurate acquisition of data and location information. Therefore, it is very necessary to provide an Internet of Things data collection and Beidou positioning transmission circuit to improve positioning performance and data transmission efficiency. Utility Model Content

[0004] In view of this, the utility model proposes an Internet of Things data collection and Beidou positioning transmission circuit. By setting up a 4G communication circuit, efficient data transmission is achieved, the GPS positioning circuit obtains longitude and latitude positioning information, improves the precision and accuracy of positioning, and the RS485 communication circuit ensures the reliability and stability of data exchange between devices, thereby improving the positioning performance and data transmission efficiency of the system.

[0005] The utility model provides an Internet of Things data acquisition and Beidou positioning transmission circuit, including a power control circuit, a 4G communication circuit, a GPS positioning circuit, an RS485 communication circuit, an information storage circuit and an MCU main control circuit, wherein:

[0006] The power control circuit is electrically connected to the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit, the information storage circuit and the MCU main control circuit respectively, and the power control circuit supplies power to the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit, the information storage circuit and the MCU main control circuit respectively;

[0007] The 4G communication circuit is electrically connected to the MCU main control circuit, and the 4G communication circuit is used to transmit the received server instructions to the MCU main control circuit, and send the data collected by the MCU main control circuit to the server;

[0008] The GPS positioning circuit is electrically connected to the MCU main control circuit, and the GPS positioning circuit is used to obtain longitude and latitude positioning information and transmit the longitude and latitude positioning information to the MCU main control circuit;

[0009] The RS485 communication circuit is electrically connected to the MCU main control circuit, and the RS485 communication circuit is used to support communication between the MCU main control circuit and the detection device;

[0010] The information storage circuit is electrically connected to the 4G communication circuit, and the information storage circuit is used to store configuration information.

[0011] On the basis of the above technical solution, preferably, the power control circuit includes a first power sub-circuit, a second power sub-circuit and a third power sub-circuit, the first power sub-circuit is electrically connected to the second power sub-circuit, the third power sub-circuit, the 4G communication circuit and the RS485 communication circuit, respectively, and the second power sub-circuit is electrically connected to the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit and the MCU main control circuit, respectively.

[0012] On the basis of the above technical solution, preferably, the first power supply sub-circuit includes a terminal P1, a fuse F1, a diode D2, a transient suppression diode D3, a capacitor C9, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R1, a resistor R3, a resistor R4, a power chip U11, an inductor L2, a diode D4 and a diode D7, the first end of the terminal P1 is respectively connected to the positive electrode of the diode D2 and the positive electrode of the transient suppression diode D3 through the fuse F1, the second end of the terminal P1 is grounded, the cathode of the diode D2 is respectively connected to one end of the capacitor C20, one end of the resistor R3 and the VIN pin of the power chip U11, the cathode of the transient suppression diode D3, the other end of the capacitor C20 and the VIN pin of the power chip U11 The GND pins are commonly grounded, the other end of the resistor R3 is connected to the EN pin of the power chip U11, the BS pin of the power chip U11 is respectively connected to the SW pin of the power chip U11 and one end of the inductor L2 through the capacitor C9, the other end of the inductor L2 is respectively connected to one end of the resistor R1, one end of the capacitor C17, one end of the capacitor C19, the second power sub-circuit and the positive electrode of the diode D4, the FB pin of the power chip U11 is respectively connected to the other end of the resistor R1, one end of the resistor R4 and the other end of the capacitor C17, the other end of the resistor R4 and the other end of the capacitor C19 are commonly grounded, and the cathode of the diode D4 is connected to the third power sub-circuit through the diode D7.

[0013] Further preferably, the second power supply sub-circuit includes a polarity capacitor C24, a capacitor C36, a power supply chip U3 and a capacitor C10, the VIN pin of the power supply chip U3 is respectively connected to the EN pin of the power supply chip U3, the first power supply sub-circuit, one end of the polarity capacitor C24 and one end of the capacitor C36, the other end of the polarity capacitor C24 and the other end of the capacitor C36 are commonly grounded, and the OUT pin of the power supply chip U3 is respectively electrically connected to the first power supply sub-circuit, the 4G communication circuit, the GPS positioning circuit, the RS485 communication circuit and the MCU main control circuit.

[0014] Further preferably, the 4G communication circuit includes a 4G chip U1, a radio frequency antenna RF1, a resistor R7, a resistor R8, a resistor R10, a resistor R13, a resistor R38, a terminal P4, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q5 and a capacitor C11, the radio frequency antenna RF1 is connected to the ANT_MAIN pin of the 4G chip U1 through the resistor R38, the first end of the terminal P4 is connected to the DBG_TXD pin of the 4G chip U1, the second end of the terminal P4 is connected to the DBG_RXD pin of the 4G chip U1, the third end of the terminal P4 is grounded, the emitter of the transistor Q1 is connected to the MCU main control circuit, the collector of the transistor Q1 is respectively connected to the MAIN_RXD pin of the 4G chip U1 and one end of the resistor R8, the base of the transistor Q1 is connected to one end of the resistor R10, and the other end of the resistor R8 is connected to the MCU main control circuit. One end and the other end of the resistor R10 are commonly connected to the 4G chip U1, the collector of the transistor Q2 is respectively connected to one end of the capacitor C11 and the PWPKEY pin of the 4G chip U1, the other end of the capacitor C11 and the emitter of the transistor Q2 are commonly grounded, the base of the transistor Q2 is connected to the MCU main control circuit, the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is connected to the RESET_N pin of the 4G chip U1, the base of the transistor Q3 is connected to the MCU main control circuit, the emitter of the transistor Q5 is connected to the MAIN_TXD pin of the 4G chip U1, the collector of the transistor Q5 is respectively connected to one end of the resistor R13 and the MCU main control circuit, the base of the transistor Q5 is connected to the 4G chip U1 through the resistor R7, and the other end of the resistor R13 is connected to the second power supply sub-circuit.

[0015] Further preferably, the GPS positioning circuit includes a GPS chip U3, a diode D10, a capacitor C45, an inductor L3 and a radio frequency antenna RF2, the VBAT pin of the GPS chip U3 is connected to the second power supply sub-circuit through the diode D10, the VCC pin of the GPS chip U3 is respectively connected to one end of the capacitor C45 and the second power supply sub-circuit, the other end of the capacitor C45 is grounded, the VCC_RF pin of the GPS chip U3 is connected to one end of the inductor L3, and the RF_IN pin of the GPS chip U3 is respectively connected to the other end of the inductor L3 and the radio frequency antenna RF2.

[0016] Further preferably, the RS485 communication circuit includes a first communication sub-circuit and a second communication sub-circuit, the first communication sub-circuit is respectively connected to the MCU main control circuit, the first power supply sub-circuit and the second power supply sub-circuit, and the second communication sub-circuit is respectively connected to the MCU main control circuit, the first power supply sub-circuit and the second power supply sub-circuit.

[0017] Further preferably, the first communication sub-circuit includes a communication chip U7, a resistor R16, a resistor R17, a resistor R19, a resistor R21, a resistor R22, a transistor Q7, a capacitor C29, an electrostatic suppressor D8 and a terminal P2, the RO pin of the communication chip U7 is connected to the MCU main control circuit, the RO pin of the communication chip U7 is respectively connected to the DE pin of the communication chip U7, one end of the resistor R16, the MCU main control circuit and the collector of the transistor Q7, the other end of the resistor R16 is respectively connected to the second power supply sub-circuit, one end of the capacitor C29, the VCC pin of the communication chip U7 and one end of the resistor R17, the other end of the capacitor C29 is grounded, the emitter of the transistor Q7 is grounded, and the transistor The base of the tube Q7 is connected to one end of the resistor R22, the DI pin of the communication chip U7 is respectively connected to the other end of the resistor R22 and the MCU main control circuit, the B pin of the communication chip U7 is respectively connected to one end of the resistor R21, one end of the resistor R19, the second end of the electrostatic suppressor D8 and the third end of the terminal P2, the A pin of the communication chip U7 is respectively connected to the other end of the resistor R17, the other end of the resistor R19, the first end of the electrostatic suppressor D8 and the second end of the terminal P2, the third end of the electrostatic suppressor D8 is grounded, the other end of the resistor R21 and the GND pin of the communication chip U7 are grounded together, the first end of the terminal P2 is connected to the first power supply sub-circuit, and the fourth end of the terminal P2 is grounded.

[0018] Further preferably, the information storage circuit includes a storage chip U4, a resistor R33, a resistor R35, a resistor R36, a resistor R37, a capacitor C23, a capacitor C25, a capacitor C26, a capacitor C27, a diode D14, a diode D15, a diode D16 and a diode D17, the VCC pin of the storage chip U4 is respectively connected to one end of the diode D14, one end of the capacitor C23, one end of the resistor R33 and the 4G communication circuit, the other end of the capacitor C23 is grounded, the RST pin of the storage chip U4 is respectively connected to one end of the diode D15, one end of the capacitor C27 and one end of the resistor R35, the other end of the resistor R35 is connected to the 4G communication circuit, and the CL pin of the storage chip U4 is The K pin is respectively connected to one end of the diode D16, one end of the capacitor C26 and one end of the resistor R36, the other end of the resistor R36 is connected to the 4G communication circuit, the I / O pin of the storage chip U4 is respectively connected to one end of the diode D17, one end of the capacitor C25, the other end of the resistor R33 and one end of the resistor R37, the other end of the resistor R37 is connected to the 4G communication circuit, the other end of the capacitor C25, the other end of the capacitor C26, the other end of the capacitor C27 and the GND pin of the storage chip U4 are grounded together, and the other end of the diode D14, the other end of the diode D15, the other end of the diode D16 and the other end of the diode D17 are grounded together.

[0019] The Internet of Things data collection and Beidou positioning transmission circuit provided by the utility model has the following beneficial effects compared with the prior art:

[0020] (1) By integrating multiple circuits such as power control, 4G communication, GPS positioning, RS485 communication and information storage, a complete IoT data collection and transmission system is realized. The 4G communication circuit can transmit server instructions to the main control circuit and send the collected data to the server, realizing efficient data transmission and communication functions. The GPS positioning circuit can obtain longitude and latitude positioning information and transmit this information to the main control circuit, thereby improving the positioning precision and accuracy. The RS485 communication circuit supports communication between the main control circuit and the detection equipment, ensuring the reliability and stability of data exchange between devices, thereby improving the system's positioning performance and data transmission efficiency;

[0021] (2) By dividing the RS485 communication circuit into two paths, it is possible to communicate with multiple devices at the same time, thereby improving communication efficiency and data transmission speed. In addition, split communication can reduce the possibility of communication conflicts, avoid data interference and conflicts between different devices, and ensure the stability and reliability of communication. At the same time, split communication can reduce the load of a single communication channel and reduce the risk of communication failures, thereby improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the framework of the Internet of Things data collection and Beidou positioning transmission circuit provided by the utility model;

[0024] Figure 2 A circuit diagram of the MCU main control circuit provided by the utility model;

[0025] Figure 3 A circuit diagram of a power supply control circuit provided by the utility model;

[0026] Figure 4 A circuit diagram of a 4G communication circuit provided by the utility model;

[0027] Figure 5 A circuit diagram of the GPS positioning circuit provided by the utility model;

[0028] Figure 6 A circuit diagram of the RS485 communication circuit provided by the utility model;

[0029] Figure 7 This is a circuit diagram of the information storage circuit provided by the utility model.

[0030] Explanation of the accompanying drawings: 1. Power control circuit; 2. 4G communication circuit; 3. GPS positioning circuit; 4. RS485 communication circuit; 5. Information storage circuit; 6. MCU main control circuit. DETAILED DESCRIPTION

[0031] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The utility model discloses an Internet of Things data collection and Beidou positioning transmission circuit, referring to Figure 1 The circuit includes a power control circuit 1, a 4G communication circuit 2, a GPS positioning circuit 3, an RS485 communication circuit 4, an information storage circuit 5 and an MCU main control circuit 6, wherein:

[0033] The power control circuit 1 is electrically connected to the 4G communication circuit 2, the GPS positioning circuit 3, the RS485 communication circuit 4, the information storage circuit 5 and the MCU main control circuit 6 respectively, and the power control circuit 1 supplies power to the 4G communication circuit 2, the GPS positioning circuit 3, the RS485 communication circuit 4, the information storage circuit 5 and the MCU main control circuit 6 respectively.

[0034] See also Figure 2 , Figure 2 Schematic diagram of the circuit of MCU main control circuit 6. MCU main control circuit 6 includes MCU chip, and the MCU chip can be selected as STM32F103RC main control microcontroller.

[0035] The MCU main control circuit 6 also includes an operation indicator light D6 and a resistor R24, wherein the positive electrode of the operation indicator light D6 is connected to the second power supply subcircuit, and the negative electrode of the operation indicator light D6 is connected to the MCU_LED pin of the MCU chip through the resistor R24. The operation indicator light D6 is continuously lit when the device is working normally. If the device is in a specific working mode or needs to express other information, different status information can be defined and conveyed by the slow or fast flashing of the operation indicator light D6.

[0036] In this embodiment, if Figure 3 As shown, the power control circuit 1 includes a first power sub-circuit, a second power sub-circuit and a third power sub-circuit. The first power sub-circuit is electrically connected to the second power sub-circuit, the third power sub-circuit, the 4G communication circuit 2 and the RS485 communication circuit 4, respectively. The second power sub-circuit is electrically connected to the 4G communication circuit 2, the GPS positioning circuit 3, the RS485 communication circuit 4 and the MCU main control circuit 6, respectively.

[0037] The first power supply sub-circuit includes a terminal P1, a fuse F1, a diode D2, a transient suppression diode D3, a capacitor C9, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R1, a resistor R3, a resistor R4, a power supply chip U11, an inductor L2, a diode D4 and a diode D7. The first end of the terminal P1 is respectively connected to the positive electrode of the diode D2 and the positive electrode of the transient suppression diode D3 through the fuse F1, the second end of the terminal P1 is grounded, the cathode of the diode D2 is respectively connected to one end of the capacitor C20, one end of the resistor R3 and the VIN pin of the power supply chip U11, the cathode of the transient suppression diode D3, the other end of the capacitor C20 and the VIN pin of the power supply chip U11 The GND pins are commonly grounded, the other end of the resistor R3 is connected to the EN pin of the power chip U11, the BS pin of the power chip U11 is respectively connected to the SW pin of the power chip U11 and one end of the inductor L2 through the capacitor C9, the other end of the inductor L2 is respectively connected to one end of the resistor R1, one end of the capacitor C17, one end of the capacitor C19, the second power sub-circuit and the positive electrode of the diode D4, the FB pin of the power chip U11 is respectively connected to the other end of the resistor R1, one end of the resistor R4 and the other end of the capacitor C17, the other end of the resistor R4 and the other end of the capacitor C19 are commonly grounded, and the cathode of the diode D4 is connected to the third power sub-circuit through the diode D7.

[0038] The second power supply sub-circuit includes a polarity capacitor C24, a capacitor C36, a power supply chip U3 and a capacitor C10. The VIN pin of the power supply chip U3 is respectively connected to the EN pin of the power supply chip U3, the first power supply sub-circuit, one end of the polarity capacitor C24 and one end of the capacitor C36. The other end of the polarity capacitor C24 and the other end of the capacitor C36 are grounded together. The OUT pin of the power supply chip U3 is respectively electrically connected to the first power supply sub-circuit, the 4G communication circuit 2, the GPS positioning circuit 3, the RS485 communication circuit 4 and the MCU main control circuit 6.

[0039] The third power supply sub-circuit includes a transient suppression diode D12, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C4, the cathode of the transient suppression diode D12 is respectively connected to the first common end of the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 and the first power supply sub-circuit, the anode of the transient suppression diode D12 is grounded, and the second common end of the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 is grounded.

[0040] The power control circuit 1 also includes a power indicator light D11 and a resistor R9, wherein the positive electrode of the power indicator light D11 is connected to the second power subcircuit, and the negative electrode of the power indicator light D11 is grounded through the resistor R9. When the device is powered on, the red power indicator light will light up, indicating that the device has been successfully powered on.

[0041] The 4G communication circuit 2 is electrically connected to the MCU main control circuit 6. The 4G communication circuit 2 is used to transmit the received server instructions to the MCU main control circuit 6 and send the data collected by the MCU main control circuit 6 to the server.

[0042] In this embodiment, if Figure 4 As shown, the 4G communication circuit 2 includes a 4G chip U1, a radio frequency antenna RF1, a resistor R7, a resistor R8, a resistor R10, a resistor R13, a resistor R38, a terminal P4, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q5 and a capacitor C11. The radio frequency antenna RF1 is connected to the ANT_MAIN pin of the 4G chip U1 through the resistor R38. The first end of the terminal P4 is connected to the DBG_TXD pin of the 4G chip U1. The second end of the terminal P4 is connected to the DBG_RXD pin of the 4G chip U1. The third end of the terminal P4 is grounded. The emitter of the transistor Q1 is connected to the MCU main control circuit 6. The collector of the transistor Q1 is respectively connected to the MAIN_RXD pin of the 4G chip U1 and one end of the resistor R8. The base of the transistor Q1 is connected to one end of the resistor R10. The resistor The other end of R8 and the other end of resistor R10 are connected to 4G chip U1, the collector of transistor Q2 is connected to one end of capacitor C11 and PWPKEY pin of 4G chip U1, the other end of capacitor C11 and emitter of transistor Q2 are grounded, the base of transistor Q2 is connected to MCU main control circuit 6, the emitter of transistor Q3 is grounded, the collector of transistor Q3 is connected to RESET_N pin of 4G chip U1, the base of transistor Q3 is connected to MCU main control circuit 6, the emitter of transistor Q5 is connected to MAIN_TXD pin of 4G chip U1, the collector of transistor Q5 is connected to one end of resistor R13 and MCU main control circuit 6, the base of transistor Q5 is connected to 4G chip U1 through resistor R7, and the other end of resistor R13 is connected to the second power supply sub-circuit. Among them, 4G chip U1 can select 4G chip EC800.

[0043] The 4G communication circuit 2 also includes a 4G indicator light D1, a resistor R2, and a transistor Q4. The positive electrode of the 4G indicator light D1 is connected to the second power subcircuit, the negative electrode of the 4G indicator light D1 is connected to the collector of the transistor Q4 through the resistor R2, the emitter of the transistor Q4 is grounded, and the base of the transistor Q4 is connected to the NET_STATUS pin of the 4G chip U1. The 4G indicator light will flash slowly when the device is searching for a network, and will flash quickly after successfully connecting to the network, so that the user can clearly know the current 4G network connection status.

[0044] The GPS positioning circuit 3 is electrically connected to the MCU main control circuit 6 , and the GPS positioning circuit 3 is used to obtain longitude and latitude positioning information and transmit the longitude and latitude positioning information to the MCU main control circuit 6 .

[0045] In this embodiment, if Figure 5 As shown, the GPS positioning circuit 3 includes a GPS chip U3, a diode D10, a capacitor C45, an inductor L3 and a radio frequency antenna RF2, the VBAT pin of the GPS chip U3 is connected to the second power sub-circuit through the diode D10, the VCC pin of the GPS chip U3 is respectively connected to one end of the capacitor C45 and the second power sub-circuit, the other end of the capacitor C45 is grounded, the VCC_RF pin of the GPS chip U3 is connected to one end of the inductor L3, and the RF_IN pin of the GPS chip U3 is respectively connected to the other end of the inductor L3 and the radio frequency antenna RF2. Among them, the GPS chip U3 can use the GPS chip ATGM336H.

[0046] The GPS positioning circuit 3 also includes a GPS indicator light D13 and a resistor R5, wherein the positive electrode of the GPS indicator light D13 is connected to the second power supply subcircuit, and the negative electrode of the GPS indicator light D13 is connected to the GPS_LED pin of the GPS chip U3 through the resistor R5. When the GPS module is positioning, the GPS indicator light will flash, and if the GPS module is turned off, the indicator light will go out, thereby reflecting the working status of the GPS module.

[0047] The RS485 communication circuit 4 is electrically connected to the MCU main control circuit 6 , and the RS485 communication circuit 4 is used to support the communication between the MCU main control circuit 6 and the detection device.

[0048] In this embodiment, if Figure 6 As shown, the RS485 communication circuit 4 includes a first communication sub-circuit and a second communication sub-circuit. The first communication sub-circuit is respectively connected to the MCU main control circuit 6, the first power sub-circuit and the second power sub-circuit, and the second communication sub-circuit is respectively connected to the MCU main control circuit 6, the first power sub-circuit and the second power sub-circuit.

[0049] The first communication sub-circuit includes a communication chip U7, a resistor R16, a resistor R17, a resistor R19, a resistor R21, a resistor R22, a transistor Q7, a capacitor C29, an electrostatic suppressor D8 and a terminal P2. The RO pin of the communication chip U7 is connected to the MCU main control circuit 6. The RO pin of the communication chip U7 is respectively connected to the DE pin of the communication chip U7, one end of the resistor R16, the MCU main control circuit 6 and the collector of the transistor Q7. The other end of the resistor R16 is respectively connected to the second power supply sub-circuit, one end of the capacitor C29, the VCC pin of the communication chip U7 and one end of the resistor R17. The other end of the capacitor C29 is grounded, the emitter of the transistor Q7 is grounded, and the transistor The base of tube Q7 is connected to one end of resistor R22, the DI pin of communication chip U7 is respectively connected to the other end of resistor R22 and MCU main control circuit 6, the B pin of communication chip U7 is respectively connected to one end of resistor R21, one end of resistor R19, the second end of electrostatic suppressor D8 and the third end of terminal P2, the A pin of communication chip U7 is respectively connected to the other end of resistor R17, the other end of resistor R19, the first end of electrostatic suppressor D8 and the second end of terminal P2, the third end of electrostatic suppressor D8 is grounded, the other end of resistor R21 and the GND pin of communication chip U7 are grounded together, the first end of terminal P2 is connected to the first power supply sub-circuit, and the fourth end of terminal P2 is grounded.

[0050] The second communication sub-circuit includes a communication chip U9, a resistor R25, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a transistor Q8, a capacitor C41, an electrostatic suppressor D9 and a terminal P8. The RO pin of the communication chip U9 is connected to the MCU main control circuit 6. The RO pin of the communication chip U9 is respectively connected to the DE pin of the communication chip U9, one end of the resistor R25, the MCU main control circuit 6 and the collector of the transistor Q8. The other end of the resistor R25 is respectively connected to the second power supply sub-circuit, one end of the capacitor C41, the VCC pin of the communication chip U9 and one end of the resistor R28. The other end of the capacitor C41 is grounded, the emitter of the transistor Q8 is grounded, and the transistor The base of tube Q8 is connected to one end of resistor R31, the DI pin of communication chip U9 is respectively connected to the other end of resistor R31 and MCU main control circuit 6, the B pin of communication chip U9 is respectively connected to one end of resistor R30, one end of resistor R29, the second end of electrostatic suppressor D9 and the third end of terminal P8, the A pin of communication chip U9 is respectively connected to the other end of resistor R28, the other end of resistor R29, the first end of electrostatic suppressor D9 and the second end of terminal P8, the third end of electrostatic suppressor D9 is grounded, the other end of resistor R30 and the GND pin of communication chip U9 are grounded together, the first end of terminal P8 is connected to the first power supply sub-circuit, and the fourth end of terminal P8 is grounded.

[0051] By dividing the RS485 communication circuit into two paths, it is possible to communicate with multiple devices at the same time, thereby improving communication efficiency and data transmission speed. In addition, split communication can reduce the possibility of communication conflicts, avoid data interference and conflicts between different devices, and ensure the stability and reliability of communication. At the same time, split communication can reduce the load of a single communication channel and reduce the risk of communication failures, thereby improving the stability and reliability of the system.

[0052] The information storage circuit 5 is electrically connected to the 4G communication circuit 2 , and the information storage circuit 5 is used to store configuration information.

[0053] In this embodiment, if Figure 7 As shown, the information storage circuit 5 includes a storage chip U4, a resistor R33, a resistor R35, a resistor R36, a resistor R37, a capacitor C23, a capacitor C25, a capacitor C26, a capacitor C27, a diode D14, a diode D15, a diode D16 and a diode D17, a VCC pin of the storage chip U4 is respectively connected to one end of the diode D14, one end of the capacitor C23, one end of the resistor R33 and the 4G communication circuit 2, the other end of the capacitor C23 is grounded, a RST pin of the storage chip U4 is respectively connected to one end of the diode D15, one end of the capacitor C27 and one end of the resistor R35, the other end of the resistor R35 is connected to the 4G communication circuit 2, and the storage chip U 4 is respectively connected to one end of the diode D16, one end of the capacitor C26 and one end of the resistor R36, the other end of the resistor R36 is connected to the 4G communication circuit 2, the I / O pin of the memory chip U4 is respectively connected to one end of the diode D17, one end of the capacitor C25, the other end of the resistor R33 and one end of the resistor R37, the other end of the resistor R37 is connected to the 4G communication circuit 2, the other end of the capacitor C25, the other end of the capacitor C26, the other end of the capacitor C27 and the GND pin of the memory chip U4 are grounded together, and the other end of the diode D14, the other end of the diode D15, the other end of the diode D16 and the other end of the diode D17 are grounded together. Among them, the memory chip U4 can select the memory chip W25Q64.

[0054] The core of the IoT data acquisition and Beidou positioning transmission circuit is the STM32F103RC master microcontroller, which communicates with sensors or other detection devices through two RS485 communication interfaces in the RS485 communication circuit 4. The master microcontroller reads or writes data according to the slave address of the sensor or detection device to achieve interaction with external devices. In addition, the master microcontroller is also responsible for processing important configuration information stored in the master microcontroller, including the timing polling time, the slave address of the sensor, the 4G network transmission address, and the MQTT account information. These configuration information can also be used as backup data during OTA upgrades. The IoT data acquisition and Beidou positioning transmission circuit is provided by the power control circuit 1 to ensure the stable operation of the entire system. The GPS positioning circuit 3 provides accurate longitude and latitude positioning information for the master microcontroller. After the system is started, the master microcontroller sends a start signal to the GPS positioning circuit 3, and then the GPS module will send positioning information to the master microcontroller at a regular interval. The 4G module sends the data collected and processed by the main control microcontroller to the network, and can also receive instructions from the server and submit them to the main control microcontroller for processing. Through two RS485 communication interfaces, the main control microcontroller can effectively read or write data from connected sensors and other detection equipment to achieve monitoring and control of environmental parameters.

[0055] It is understandable that the PA9 and PA10 pins of the main control microcontroller STM32F103RC are used for debugging printing, while program downloading is achieved by connecting to the SWDIO and SWCLK pins. The RS485 communication circuit 4 is divided into two paths. The RO and DI pins of the first communication subcircuit are connected to PC10 and PC11 respectively, and the second communication subcircuit connects the RO and DI pins to PC12 and PD2 respectively. The CS, SCK, DO, and DI pins of the storage chip U4 are connected to PB12, PB13, PB14, and PB15 respectively to achieve data interaction with the main control microcontroller. For the 4G chip U1, its RX, TX, DTR, RST, and PWR pins are connected to PB10, PB11, PC4, PC5, and PA8 respectively to support network communication. The RX, TX, and CTR pins of the GPS chip U3 are connected to PA2, PA3, and PA1 respectively to ensure the realization of the positioning function.

[0056] By integrating multiple circuits such as power control, 4G communication, GPS positioning, RS485 communication and information storage, a complete IoT data collection and transmission system is realized. The 4G communication circuit 2 can transmit server instructions to the main control circuit and send the collected data to the server, realizing efficient data transmission and communication functions. The GPS positioning circuit 3 can obtain longitude and latitude positioning information and transmit this information to the main control circuit, thereby improving the precision and accuracy of positioning. The RS485 communication circuit 4 supports communication between the main control circuit and the detection equipment, ensuring the reliability and stability of data exchange between devices, thereby improving the positioning performance and data transmission efficiency of the system.

[0057] In terms of indicator light design, the high voltage end of the running indicator light D6 is connected to 3.3V, and the low voltage end is connected to PA4. The two ends of the power indicator light D11 are connected to 3.3V and ground respectively, and the latter is connected through a resistor. The GPS indicator light D13 is also connected to 3.3V, and the low voltage end is connected to the IPPX pin of ATGM336H through a resistor. The design of the 4G indicator light D1 is similar, and its low voltage end is connected to the NET_STATUS pin of EC800 through an inductor.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An Internet of Things data collection and Beidou positioning transmission circuit, characterized in that: It comprises a power control circuit (1), a 4G communication circuit (2), a GPS positioning circuit (3), an RS485 communication circuit (4), an information storage circuit (5) and an MCU main control circuit (6), wherein: The power control circuit (1) is electrically connected to the 4G communication circuit (2), the GPS positioning circuit (3), the RS485 communication circuit (4), the information storage circuit (5) and the MCU main control circuit (6), respectively, and the power control circuit (1) supplies power to the 4G communication circuit (2), the GPS positioning circuit (3), the RS485 communication circuit (4), the information storage circuit (5) and the MCU main control circuit (6); The 4G communication circuit (2) is electrically connected to the MCU main control circuit (6), and the 4G communication circuit (2) is used to transmit the received server instructions to the MCU main control circuit (6), and send the data collected by the MCU main control circuit (6) to the server; The GPS positioning circuit (3) is electrically connected to the MCU main control circuit (6), and the GPS positioning circuit (3) is used to obtain longitude and latitude positioning information and transmit the longitude and latitude positioning information to the MCU main control circuit (6); The RS485 communication circuit (4) is electrically connected to the MCU main control circuit (6), and the RS485 communication circuit (4) is used to support communication between the MCU main control circuit (6) and the detection device; The information storage circuit (5) is electrically connected to the 4G communication circuit (2), and the information storage circuit (5) is used to store configuration information.

2. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 1, characterized in that: The power control circuit (1) comprises a first power sub-circuit, a second power sub-circuit and a third power sub-circuit, the first power sub-circuit being electrically connected to the second power sub-circuit, the third power sub-circuit, the 4G communication circuit (2) and the RS485 communication circuit (4) respectively, and the second power sub-circuit being electrically connected to the 4G communication circuit (2), the GPS positioning circuit (3), the RS485 communication circuit (4) and the MCU main control circuit (6) respectively.

3. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 2 is characterized in that: The first power supply subcircuit includes a terminal P1, a fuse F1, a diode D2, a transient suppression diode D3, a capacitor C9, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R1, a resistor R3, a resistor R4, a power chip U11, an inductor L2, a diode D4 and a diode D7. The first end of the terminal P1 is respectively connected to the positive electrode of the diode D2 and the positive electrode of the transient suppression diode D3 through the fuse F1, the second end of the terminal P1 is grounded, the cathode of the diode D2 is respectively connected to one end of the capacitor C20, one end of the resistor R3 and the VIN pin of the power chip U11, and the cathode of the transient suppression diode D3, the other end of the capacitor C20 and the GND pin of the power chip U11 are commonly connected. The other end of the resistor R3 is connected to the EN pin of the power chip U11, the BS pin of the power chip U11 is respectively connected to the SW pin of the power chip U11 and one end of the inductor L2 through the capacitor C9, the other end of the inductor L2 is respectively connected to one end of the resistor R1, one end of the capacitor C17, one end of the capacitor C19, the second power sub-circuit and the positive electrode of the diode D4, the FB pin of the power chip U11 is respectively connected to the other end of the resistor R1, one end of the resistor R4 and the other end of the capacitor C17, the other end of the resistor R4 and the other end of the capacitor C19 are grounded together, and the cathode of the diode D4 is connected to the third power sub-circuit through the diode D7.

4. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 3 is characterized in that: The second power supply sub-circuit comprises a polarity capacitor C24, a capacitor C36, a power supply chip U3 and a capacitor C10. The VIN pin of the power supply chip U3 is respectively connected to the EN pin of the power supply chip U3, the first power supply sub-circuit, one end of the polarity capacitor C24 and one end of the capacitor C36. The other end of the polarity capacitor C24 and the other end of the capacitor C36 are commonly grounded. The OUT pin of the power supply chip U3 is respectively electrically connected to the first power supply sub-circuit, the 4G communication circuit (2), the GPS positioning circuit (3), the RS485 communication circuit (4) and the MCU main control circuit (6).

5. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 4 is characterized in that: The 4G communication circuit (2) comprises a 4G chip U1, a radio frequency antenna RF1, a resistor R7, a resistor R8, a resistor R10, a resistor R13, a resistor R38, a terminal P4, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q5 and a capacitor C11, the radio frequency antenna RF1 is connected to the ANT_MAIN pin of the 4G chip U1 through the resistor R38, a first end of the terminal P4 is connected to the DBG_TXD pin of the 4G chip U1, a second end of the terminal P4 is connected to the DBG_RXD pin of the 4G chip U1, a third end of the terminal P4 is grounded, an emitter of the transistor Q1 is connected to the MCU main control circuit (6), a collector of the transistor Q1 is respectively connected to the MAIN_RXD pin of the 4G chip U1 and one end of the resistor R8, a base of the transistor Q1 is connected to one end of the resistor R10, and the other end of the resistor R8 is connected to the capacitor C11. The other end of the resistor R10 is commonly connected to the 4G chip U1, the collector of the transistor Q2 is respectively connected to one end of the capacitor C11 and the PWPKEY pin of the 4G chip U1, the other end of the capacitor C11 and the emitter of the transistor Q2 are commonly grounded, the base of the transistor Q2 is connected to the MCU main control circuit (6), the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is connected to the RESET_N pin of the 4G chip U1, the base of the transistor Q3 is connected to the MCU main control circuit (6), the emitter of the transistor Q5 is connected to the MAIN_TXD pin of the 4G chip U1, the collector of the transistor Q5 is respectively connected to one end of the resistor R13 and the MCU main control circuit (6), the base of the transistor Q5 is connected to the 4G chip U1 through the resistor R7, and the other end of the resistor R13 is connected to the second power supply sub-circuit.

6. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 4 is characterized in that: The GPS positioning circuit (3) comprises a GPS chip U3, a diode D10, a capacitor C45, an inductor L3 and a radio frequency antenna RF2, wherein the VBAT pin of the GPS chip U3 is connected to the second power supply subcircuit via the diode D10, the VCC pin of the GPS chip U3 is respectively connected to one end of the capacitor C45 and the second power supply subcircuit, the other end of the capacitor C45 is grounded, the VCC_RF pin of the GPS chip U3 is connected to one end of the inductor L3, and the RF_IN pin of the GPS chip U3 is respectively connected to the other end of the inductor L3 and the radio frequency antenna RF2.

7. The Internet of Things data collection and Beidou positioning transmission circuit as described in claim 2, characterized in that: The RS485 communication circuit (4) comprises a first communication subcircuit and a second communication subcircuit, the first communication subcircuit being respectively connected to the MCU main control circuit (6), the first power supply subcircuit and the second power supply subcircuit, and the second communication subcircuit being respectively connected to the MCU main control circuit (6), the first power supply subcircuit and the second power supply subcircuit.

8. The Internet of Things data collection and Beidou positioning transmission circuit as claimed in claim 7, characterized in that: The first communication subcircuit comprises a communication chip U7, a resistor R16, a resistor R17, a resistor R19, a resistor R21, a resistor R22, a transistor Q7, a capacitor C29, an electrostatic suppressor D8 and a terminal P2, the RO pin of the communication chip U7 is connected to the MCU main control circuit (6), the RO pin of the communication chip U7 is respectively connected to the DE pin of the communication chip U7, one end of the resistor R16, the MCU main control circuit (6) and the collector of the transistor Q7, the other end of the resistor R16 is respectively connected to the second power supply subcircuit, one end of the capacitor C29, the VCC pin of the communication chip U7 and one end of the resistor R17, the other end of the capacitor C29 is grounded, the emitter of the transistor Q7 is grounded, and the transistor Q7 is connected to the VCC pin of the communication chip U7. The base of the communication chip U7 is connected to one end of the resistor R22, the DI pin of the communication chip U7 is respectively connected to the other end of the resistor R22 and the MCU main control circuit (6), the B pin of the communication chip U7 is respectively connected to one end of the resistor R21, one end of the resistor R19, the second end of the electrostatic suppressor D8 and the third end of the terminal P2, the A pin of the communication chip U7 is respectively connected to the other end of the resistor R17, the other end of the resistor R19, the first end of the electrostatic suppressor D8 and the second end of the terminal P2, the third end of the electrostatic suppressor D8 is grounded, the other end of the resistor R21 and the GND pin of the communication chip U7 are grounded together, the first end of the terminal P2 is connected to the first power supply sub-circuit, and the fourth end of the terminal P2 is grounded.

9. The Internet of Things data collection and Beidou positioning transmission circuit as claimed in claim 1, characterized in that: The information storage circuit (5) comprises a storage chip U4, a resistor R33, a resistor R35, a resistor R36, a resistor R37, a capacitor C23, a capacitor C25, a capacitor C26, a capacitor C27, a diode D14, a diode D15, a diode D16 and a diode D17, a VCC pin of the storage chip U4 is respectively connected to one end of the diode D14, one end of the capacitor C23, one end of the resistor R33 and the 4G communication circuit (2), the other end of the capacitor C23 is grounded, an RST pin of the storage chip U4 is respectively connected to one end of the diode D15, one end of the capacitor C27 and one end of the resistor R35, the other end of the resistor R35 is connected to the 4G communication circuit (2), and a CLK pin of the storage chip U4 is connected to one end of the diode D15, one end of the capacitor C27 and one end of the resistor R35. They are respectively connected to one end of the diode D16, one end of the capacitor C26 and one end of the resistor R36, the other end of the resistor R36 is connected to the 4G communication circuit (2), the I / O pin of the storage chip U4 is respectively connected to one end of the diode D17, one end of the capacitor C25, the other end of the resistor R33 and one end of the resistor R37, the other end of the resistor R37 is connected to the 4G communication circuit (2), the other end of the capacitor C25, the other end of the capacitor C26, the other end of the capacitor C27 and the GND pin of the storage chip U4 are grounded together, and the other end of the diode D14, the other end of the diode D15, the other end of the diode D16 and the other end of the diode D17 are grounded together.

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