CN111935793A - Dual-mode 4G public and private network online switching device and method based on data acquisition service - Google Patents
Dual-mode 4G public and private network online switching device and method based on data acquisition service Download PDFInfo
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Abstract
The switching device comprises a routing module, a communication module, a main control chip, a power module and a network port module, the switching device is communicated with the communication module through a route and reads private network information acquired by the communication module, once the signal intensity of a private network reaches a communication requirement threshold value, the routing module controls a pin SIM _ CTLR through a control switch module to switch an SIM card to a public network card, and the routing module carries out public network communication through the public network card, so that the online switching of the dual-mode 4G public and private network based on the data acquisition service is realized. The invention also comprises a data acquisition module, and a plurality of 485 acquisition interfaces and an additional 232 acquisition interface are arranged, and the protection components and the isolation chip adopted by the two acquisition interfaces can realize the universality of the acquired data and can also be a better protection circuit when the acquired data is collected.
Description
Technical Field
The invention relates to the technical field of electric power data information acquisition, in particular to a dual-mode 4G public and private network online switching device and method for data acquisition based on data acquisition service.
Background
Communication networks for collecting power data information generally have two ways: one is public mobile internet (hereinafter, referred to as public network in a unified way), and the other is a mobile internet mode (hereinafter, referred to as private network in a unified way) special for 1.8G electric power, the public network has been developed for many years, the network deployment is relatively perfect, the coverage area of signals is relatively wide, and the mobile internet is suitable for general users and users needing to continuously change working and living places. However, for the effect of each aspect of electric power data information acquisition, the private network has higher reliability than the public network, and can access the network for communication at any time, and the private network can enable users to freely control and control, thereby improving the service quality, and what is more, the private network adopts different levels of encryption modes, thereby ensuring the information safety and saving the cost.
With the development of private network technology, 1.8G electric power 4G network signals are not available in many places due to the short deployment time of the private network. For the remote acquisition device, when the private network is not covered, if the private network is used, the device must be replaced on site, which requires a great deal of human resources and waste of cost, so that the switching between the public network and the private network cannot be performed at present.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a device capable of freely switching a public and private network in a region with 1.8G electric power 4G network signals and a method for realizing the device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dual-mode 4G public and private network online switching device based on data acquisition services comprises a routing module, a communication module, a main control chip, a power module and a network port module.
The routing module comprises a power supply interface, a reset interface RST _ GD, a network interface, a USB interface, a switch module control pin SIM _ CTLR and a serial port.
The routing power interface comprises +3.3V _350 and GND.
The network port interface comprises a LAN1 interface and a LAN2 interface; the LAN1 interface comprises a LAN4_ LED, TP4, TN4, RP4 and RN 4; the LAN2 interface comprises a LAN0_ LED, TP0, TN0, RP0 and RN 0.
The USB interface comprises USB _ DM and USB _ DP.
The serial port comprises P0.9_ RXD and P0.8_ TXD.
The communication module comprises a power interface, a USB interface and a switch module control pin SIM _ CTLR;
the power interface includes +3.9V, GND.
The USB interface comprises USB _ DM and USB _ DP.
The main control chip comprises a power interface, a reset interface RST _350 and a serial port.
The power interface includes +3.3V, GND.
The serial port comprises P0.9_ RXD and P0.8_ TXD.
The network port module comprises a power supply interface and a network port interface.
The network port interface comprises a LAN3 interface and a LAN4 interface; the LAN3 interface comprises a LAN4_ LED, TP4, TN4, RP4 and RN 4; the LAN4 interface comprises a LAN0_ LED, TP0, TN0, RP0 and RN 0.
The power supply module comprises a reset interface and a power supply interface;
the reset interface comprises a reset interface RST _350 and a reset interface RST _ GD;
the power interface includes +3.3V, +3.3V _350, +3.9V, and GND.
The RST _350 of the power supply module is in electrical signal connection with the RST _350 of the main control chip; the RST _ GD of the power supply module is connected with the routed RST _ GD electric signal; the +3.3V of the power module is connected with the +3.3V electric signal of the main control chip; the +3.3V _350 of the power supply module is electrically connected with the routing module and the +3.3V _350 of the network port; the +3.9V of the power supply module is connected with the +3.9V electric signal of the communication module; and the GND of the power supply module is connected with the GND electric signal of the main control chip, the routing module, the communication module and the net port.
The LAN1 interface of the routing module is connected with the LAN3 interface of the network port module by corresponding electric signals; the LAN2 interface of the routing module is connected with the LAN4 interface of the network port module by corresponding electric signals; the USB interface of the routing module is connected with the USB interface of the communication module in a corresponding electric signal manner; the switch module control of the routing module is connected with the switch module control electric signal of the communication module; and the serial port of the routing module is connected with the serial port of the main control chip in a corresponding electric signal mode.
The working mode is as follows: after the power supply module is electrified, power is supplied to the main control chip, the routing module, the communication module and the network port module, after the main control chip is electrified and started, the power supply module is controlled through RST _350, the purpose of controlling the power supply of the routing module is achieved, and data information of the routing module is read through a serial port and a control instruction is sent; the routing module controls the power supply module through RST _ GD to achieve the purpose of controlling the power supply of the communication module, reads data information of the communication module through the USB interface and sends a control instruction, and the SIM card is controlled to be switched through SIM _ CTRL to achieve free switching of a public network and a private network.
Preferably, the system also comprises a data acquisition module which acquires data of the acquired device through the 485 interface and transmits the acquired data to the routing module through the LAN3 interface and the LAN4 interface.
Preferably, the data acquisition module comprises a power module, a main control chip, a 485 acquisition module, a storage module, a clock module and a display module;
the power supply module supplies power to the main control chip, the 485 acquisition module, the storage module, the clock module and the display module; the master control chip is connected with the 485 acquisition module through a serial port, and transmits an acquisition command to the acquired equipment through the 485 acquisition module and reads acquired information; the main control chip is connected with the clock and the storage module through I2C, the main control chip stores data information into the storage module, and the data information also comprises current time information provided by the clock module; the main control chip is connected with the display module through the I/O interface to display the normal operation state of the data acquisition module and the communication state of the 485 acquisition module.
Preferably, the 485 acquisition module comprises 4 paths of 485 interfaces.
Preferably, the 4 paths of 485 interfaces are connected in parallel and are in electrical signal connection with the main control chip.
The 485 interface comprises a signal isolation chip, a power isolation chip, a 485 chip and a protection component, wherein the signal isolation chip comprises a TLP2362, the power isolation chip comprises a B _ S-3WR2, and the protection component comprises a transient suppression diode; the signal isolation chip performs conversion of an electric signal, an optical signal and an electric signal through TLP2362 (TLP 2362 uses photosensitive dye molecules to capture photon energy, the dye molecules separate negatively charged electrons and positively charged holes of a semiconductor after absorbing the photon energy, conversion of the electric signal, the optical signal and the electric signal is realized, and a circuit signal is protected), the power isolation chip realizes transformer coupling through B _ S-3WR2, the 485 chip converts a TTL protocol into a 485 protocol, the protection component realizes protection of the 485 signal through a transient suppression diode, an instruction output by the main control chip completes conversion of the signal through the signal isolation chip, the converted signal is input to the 485 chip for protocol conversion, and the protection component outputs the converted signal to a device to be sampled; the collected data are transmitted back to the main control chip through the protection component, the 485 chip and the signal isolation chip in sequence.
Preferably, the protection component further comprises a discharge tube, a self-recovery fuse and a piezoresistor, one end of the piezoresistor is connected with the casing, the other end of the piezoresistor is connected with the 485 chip circuit, one end of the discharge tube is connected with the casing, the other end of the discharge tube is connected with the self-recovery fuse, and the self-recovery fuse is directly connected with the 485 chip circuit to prevent lightning stroke.
The 485 acquisition circuit also includes a 232 interface.
Preferably, the 232 interface includes a signal isolation chip, a power isolation chip, a 232 chip and a protection component, the signal isolation chip includes a TLP2362, the power isolation chip includes a B _ S-3WR2, and the protection component includes a transient suppression diode; the signal isolation chip performs conversion of an electrical signal, an optical signal and an electrical signal through a TLP2362 (the TLP2362 uses photosensitive dye molecules to capture photon energy, the dye molecules separate negatively-charged electrons and positively-charged holes of a semiconductor after absorbing the photon energy, so that conversion of the electrical signal, the optical signal and the electrical signal is realized, and a circuit signal is protected), the power isolation chip realizes transformer coupling through B _ S-3WR2, the 232 chip converts a TTL protocol into a 232 protocol, the protection component realizes protection of the 232 signal through a transient suppression diode, an instruction output by the main control chip completes conversion of the signal through the signal isolation chip, the converted signal is input to the 232 chip for protocol conversion, and the protection component outputs the converted signal to a device to be sampled; the collected data are transmitted back to the main control chip through the protection component, the 232 chip and the signal isolation chip in sequence.
The protection component also comprises a discharge tube, a self-recovery fuse and a piezoresistor, and lightning stroke is prevented.
The invention also provides a dual-mode 4G public and private network online switching method based on the data acquisition service, which comprises a routing module, a communication module, a main control chip, a power supply module, a network port and a data acquisition module; the communication module comprises two SIM cards, wherein one SIM card is a public network card, and the other SIM card is a special network card;
the routing module is communicated with the communication module through a usb interface, private network information acquired by the communication module is read, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module is communicated with the private network through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal intensity does not reach the communication requirement threshold value, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network.
Preferably, in an idle period of public network communication, the routing module controls the pin SIM _ CTLR to switch the SIM card to the special network card through the control switch module, the special network information acquired by the communication module is read again, if the signal intensity of the special network reaches a communication requirement threshold value, the routing module performs special network communication through the special network card, and the data acquisition module is linked with the server platform through the special network;
if the signal intensity does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network, so that the detection and switching of the public and private networks in the idle period of the public network communication are realized.
Preferably, under the condition of private network communication, the routing module reads private network information acquired by the communication module, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module performs private network communication through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal strength does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is linked with the server platform through the public network, so that the detection of the poor private network communication signals is realized, and the network switching from the private network to the public network is realized under the condition that the private network communication signals are poor.
Has the advantages that:
(1) the routing module is communicated with the communication module through the usb interface, private network information acquired by the communication module is read, and if the private network signal intensity reaches a communication requirement threshold value, the routing module is communicated with the private network through the private network card. If the signal intensity does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, and the routing module performs public network communication through the public network card, so that the online switching of the dual-mode 4G public and private network based on the data acquisition service is realized.
(2) The invention also provides a 485 acquisition module, a storage module, a clock module and a display module; the master control chip is connected with the 485 acquisition module through a serial port, and transmits an acquisition command to the acquired equipment through the 485 acquisition module and reads acquired information; the main control chip is connected with the clock and the storage module through I2C, the main control chip stores the data information into the storage module, and the data information also comprises the current time information provided by the clock module; the main control chip is connected with the display module through the I/O interface to display the normal operation state of the data acquisition module and the communication state of the 485 acquisition module. Thereby enabling data acquisition.
(3) The 485 interface comprises a signal isolation chip, a power isolation chip, a 485 chip and a protection component, wherein the signal isolation chip comprises a TLP2362, the power isolation chip comprises a B _ S-3WR2, and the protection component comprises a transient suppression diode; the signal isolation chip converts an electric signal into an optical signal into an electric signal through the TLP2362, the TLP2362 captures the energy of photons by using photosensitive dye molecules, and the dye molecules separate negatively charged electrons and positively charged holes of a semiconductor after absorbing the energy of the photons to realize the conversion of the electric signal into the optical signal into the electric signal, thereby realizing the protection of circuit signals.
(4) The protection assembly further comprises a discharge tube, a self-recovery fuse and a piezoresistor, wherein one end of the discharge tube is connected into the shell, the other end of the discharge tube is connected into the self-recovery fuse, the self-recovery fuse is directly connected into the 485 chip circuit, and the discharge tube achieves the function of preventing lightning stroke.
(5) 4-path 485 interfaces and one-path 232 interfaces are arranged, 4-path 485 communication and 1-path 232 communication can be realized, multi-path information acquisition of the equipment is realized, and the universality of the equipment is improved.
Drawings
Fig. 1 is a schematic circuit structure diagram of a dual-mode 4G public/private network online switching device based on data acquisition services;
FIG. 2 is a schematic diagram of a circuit configuration of a data acquisition module;
FIG. 3 is a schematic diagram of a circuit structure of a 485 acquisition module;
FIG. 4 is a schematic diagram of a 485 interface circuit;
FIG. 5 is a schematic circuit diagram of a protection device;
fig. 6 is a schematic diagram of a 232-chip circuit structure.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Example 1: as shown in fig. 1, an online switching device of a dual-mode 4G public/private network based on a data acquisition service includes a power module 4, a network port module 5, a communication module 2, a main control chip 3, and a routing module 1.
The routing module 1 comprises a power interface 11, a reset interface RST _ GD 12, a network interface 13, a USB interface 14, a switch module control pin SIM _ CTLR 15, and a serial port 16.
The routing power interface 11 comprises +3.3V _350 and GND.
The portal interface 13 includes a LAN1 interface 131 and a LAN2 interface 132; the LAN1 interface 131 includes LAN4_ LED, TP4, TN4, RP4, RN 4; the LAN2 interface 132 includes LAN0_ LED, TP0, TN0, RP0, RN 0.
The USB interface 14 includes USB _ DM and USB _ DP.
The serial port 16 includes P0.9_ RXD and P0.8_ TXD.
The communication module 2 comprises a power interface 21, a USB interface 22 and a switch module control pin SIM _ CTLR 23;
the power interface 21 includes +3.9V, GND.
The USB interface 22 includes USB _ DM and USB _ DP.
The main control chip 3 includes a power interface 31, a reset interface RST _ 35032, and a serial port 33.
The power interface 31 includes +3.3V, GND.
The serial port 33 includes P0.9_ RXD and P0.8_ TXD.
The network port module 5 comprises a power interface 51 and a network port interface 52.
The network port interface 52 comprises a LAN3 interface 521 and a LAN4 interface 522; the LAN1 interface 521 comprises a LAN4_ LED, TP4, TN4, RP4 and RN 4; the LAN2 interface 522 includes LAN0_ LED, TP0, TN0, RP0, RN 0.
The power module 4 comprises a reset interface 41 and a power interface 42;
the reset interface 41 comprises a reset interface RST _350 and a reset interface RST _ GD;
the power interface 42 includes +3.3V, +3.3V _350, +3.9V, and GND.
The RST _350 of the power module 4 is in electrical signal connection with the RST _350 of the main control chip 3; the RST _ GD of the power supply module 4 is electrically connected with the RST _ GD of the routing module 1; the +3.3V of the power module 4 is connected with the +3.3V electric signal of the main control chip 3; the +3.3V _350 of the power module 4 is electrically connected with the +3.3V _350 of the routing module 1 and the network port module 5; the +3.9V of the power module 4 is connected with the +3.9V electric signal of the communication module 2; and the GND of the power module 4 is connected with the GND electric signals of the main control chip 3, the routing module 1, the communication module 2 and the net port module 5.
The LAN1 interface 131 of the routing module 1 and the LAN3 interface 521 of the network port module 5 are connected corresponding to electric signals; the LAN2 interface 132 of the routing module 1 and the LAN4 interface 522 of the network port module 5 are correspondingly connected by electric signals; the USB interface 14 of the routing module 1 is connected with the USB interface 22 of the communication module 2 in a corresponding electric signal way; the switch module control pin SIM _ CTLR 15 of the routing module 1 is in electric signal connection with the switch module control pin SIM _ CTLR 23 of the communication module 2; the serial port 16 of the routing module 1 is connected with the serial port 33 of the main control chip 3 in a corresponding electric signal mode.
The working mode is as follows: after the power supply module is electrified, power is supplied to the main control chip, the routing module, the communication module and the network port module, after the main control chip is electrified and started, the power supply module is controlled through RST _350, the purpose of controlling the power supply of the routing module is achieved, and data information of the routing module is read through a serial port and a control instruction is sent; the routing module controls the power supply module through RST _ GD to achieve the purpose of controlling the power supply of the communication module, reads data information of the communication module through the USB interface and sends a control instruction, and the SIM card is controlled to be switched through SIM _ CTRL to achieve free switching of a public network and a private network.
Preferably, the system also comprises a data acquisition module 6, wherein the data acquisition module acquires data of the acquired device through a 485 interface and transmits the acquired data to the routing module 1 through a LAN3 interface 521 and a LAN4 interface 522.
Preferably, the data acquisition module includes a power module 61, a main control chip 62, a 485 acquisition module 63, a storage module 64, a clock module 65 and a display module 66;
the power supply module 61 supplies power to the main control chip 62, the 485 acquisition module 63, the storage module 64, the clock module 65 and the display module 66; the master control chip 62 is connected with the 485 acquisition module 63 through a serial port, and transmits an acquisition command to the acquired equipment through the 485 acquisition module 63 and reads acquired information; the main control chip 62 is connected with the clock and storage module 64 through I2C, the main control chip 62 stores data information into the storage module 64, and the data information further includes current time information provided by the clock module 65; the main control chip 62 is connected to the display module 66 through an I/O interface to display the normal operation state of the data acquisition module and the communication state of the 485 acquisition module 63.
Preferably, the 485 acquisition module 63 includes 4-way 485 interfaces 7.
Preferably, the 4-channel 485 interface 7 is connected in parallel and is electrically connected with the main control chip 62.
The 485 interface 7 comprises a signal isolation chip 71, a power isolation chip 72, a 485 chip 73 and a protection component 74, wherein the signal isolation chip 71 comprises a TLP2362, the power isolation chip 72 comprises a B _ S-3WR2, and the protection component 74 comprises a transient suppression diode; the signal isolation chip 71 performs conversion from an electrical signal to an optical signal to an electrical signal through the TLP2362, the TLP2362 uses photosensitive dye molecules to capture photon energy, the dye molecules separate negatively charged electrons and positively charged holes of a semiconductor after absorbing the photon energy, so that conversion from the electrical signal to the optical signal to the electrical signal is realized, a circuit signal is protected, the power isolation chip 72 realizes transformer coupling through the B _ S-3WR2, the 485 chip 73 converts a TTL protocol to a 485 protocol, the protection component 74 realizes protection of the 485 signal through a transient suppression diode, an instruction output by the main control chip 62 completes conversion of the signal through the signal isolation chip 71, the converted signal is input to the 485 chip for protocol conversion, and the protection component 74 outputs the converted signal to a device to be sampled; the collected data are transmitted back to the main control chip 62 through the protection component 74, the 485 chip 73 and the signal isolation chip 71 in sequence.
Preferably, the protection component 74 further includes a discharge tube, a self-recovery fuse and a voltage dependent resistor, one end of the voltage dependent resistor is connected to the chassis, the other end of the voltage dependent resistor is connected to the 485 chip circuit, one end of the discharge tube is connected to the chassis, the other end of the discharge tube is connected to the self-recovery fuse, and the self-recovery fuse is directly connected to the 485 chip circuit, so that a protection circuit can be implemented and lightning stroke can be prevented.
The 485 acquisition circuit 63 further comprises a 232 interface 8. 4-path 485 interfaces and one-path 232 interfaces are arranged, 4-path 485 communication and 1-path 232 communication can be realized, multi-path information acquisition of the equipment is realized, and the universality of the equipment is improved.
Preferably, the 232 interface is an interface circuit obtained by replacing the 485 chip with the 232 chip, and the rest of the constituent circuits are the same as the 485 interface, i.e., the 232 interface can also protect the circuit through a protection component, a signal isolation chip and a power isolation chip to prevent lightning stroke.
The working mode is as follows: after the power supply module is electrified, power is supplied to the main control chip, the routing module, the communication module and the network port module, after the main control chip is electrified and started, the power supply module is controlled through RST _350, the purpose of controlling the power supply of the routing module is achieved, and data information of the routing module is read through a serial port and a control instruction is sent; the routing module controls the power supply module through RST _ GD to achieve the purpose of controlling the power supply of the communication module, reads data information of the communication module through the USB interface and sends a control instruction, and the SIM card is controlled to be switched through SIM _ CTRL to achieve free switching of a public network and a private network.
The routing module is communicated with the communication module through the usb interface, private network information acquired by the communication module is read, and if the private network signal intensity reaches a communication requirement threshold value, the routing module is communicated with the private network through the private network card. If the signal intensity does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, and the routing module performs public network communication through the public network card, so that the online switching of the dual-mode 4G public and private network based on the data acquisition service is realized.
Example 2: the invention also provides a dual-mode 4G public and private network online switching method based on the data acquisition service, which comprises a routing module, a communication module, a main control chip, a power supply module, a network port and a data acquisition module; the communication module comprises two SIM cards, wherein one SIM card is a public network card, and the other SIM card is a special network card;
the routing module is communicated with the communication module through a usb interface, private network information acquired by the communication module is read, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module is communicated with the private network through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal intensity does not reach the communication requirement threshold value, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network.
Preferably, in an idle period of public network communication, the routing module controls the pin SIM _ CTLR to switch the SIM card to the special network card through the control switch module, the special network information acquired by the communication module is read again, if the signal intensity of the special network reaches a communication requirement threshold value, the routing module performs special network communication through the special network card, and the data acquisition module is linked with the server platform through the special network;
if the signal intensity does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network, so that the detection and switching of the public and private networks in the idle period of the public network communication are realized.
Preferably, under the condition of private network communication, the routing module reads private network information acquired by the communication module, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module performs private network communication through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal strength does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is linked with the server platform through the public network, so that the detection of the poor private network communication signals is realized, and the network switching from the private network to the public network is realized under the condition that the private network communication signals are poor.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (13)
1. The on-line switching device of the dual-mode 4G public and private network based on the data acquisition service is characterized in that: the system comprises a routing module (1), a communication module (2), a main control chip (3), a power module (4) and a network port module (5);
the routing module (1) comprises a power interface (11), a reset interface RST _ GD (12), a network port interface (13), a USB interface (14), a switch module control pin SIM _ CTLR (15) and a serial port (16);
the power interface (11) comprises +3.3V _350 and GND;
the portal interface (13) comprises a LAN1 interface (131) and a LAN2 interface (132); the LAN1 interface (131) comprises a LAN4_ LED, TP4, TN4, RP4, RN 4; the LAN2 interface (132) includes a LAN0_ LED, TP0, TN0, RP0, RN 0;
the USB interface (14) comprises USB _ DM, USB _ DP;
the serial port (16) comprises P0.9_ RXD and P0.8_ TXD;
the communication module (2) comprises a power interface (21), a USB interface (22) and a switch module control pin SIM _ CTLR (23);
the power interface (21) comprises +3.9V, GND;
the USB interface (22) comprises USB _ DM, USB _ DP;
the main control chip (3) comprises a power interface (31), a reset interface RST _350 (32) and a serial port (33);
the power interface (31) comprises +3.3V, GND;
the serial port (33) comprises P0.9_ RXD and P0.8_ TXD;
the network port module (5) comprises a power interface (51) and a network port interface (52);
the network port interface (52) comprises a LAN3 interface (521) and a LAN4 interface (522); the LAN3 interface (521) comprises a LAN4_ LED, TP4, TN4, RP4 and RN 4; the LAN4 interface (522) includes LAN0_ LED, TP0, TN0, RP0, RN 0;
the power supply module (4) comprises a reset interface (41) and a power supply interface (42);
the reset interface (41) comprises a reset interface RST _350 and a reset interface RST _ GD;
the power interface (42) includes +3.3V, +3.3V _350, +3.9V, and GND.
2. The RST _350 of the power supply module (4) is in electric signal connection with the RST _350 of the main control chip (3); the RST _ GD of the power supply module (4) is electrically connected with the RST _ GD of the routing module (1); the +3.3V of the power module (4) is connected with the +3.3V electric signal of the main control chip (3); the +3.3V _350 of the power supply module (4) is electrically connected with the +3.3V _350 of the routing module (1) and the +3.3V _350 of the network port module (5); the +3.9V of the power module (4) is connected with the +3.9V electric signal of the communication module (2); the GND of the power module (4) is connected with GND electric signals of the main control chip (3), the routing module (1), the communication module (2) and the network port module (5);
the LAN1 interface (131) of the routing module (1) and the LAN3 interface (521) of the network port module (5) are connected corresponding to electric signals; the LAN2 interface (132) of the routing module (1) and the LAN4 interface (522) of the network port module (5) are connected correspondingly to electric signals; the USB interface (14) of the routing module (1) is in corresponding electrical signal connection with the USB interface (22) of the communication module (2); the switch module control pin SIM _ CTLR (15) of the routing module (1) is in electric signal connection with the switch module control pin SIM _ CTLR (23) of the communication module (2); the serial port (16) of the routing module (1) is correspondingly connected with the serial port (33) of the main control chip (3) through an electric signal.
3. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 1, wherein: the data acquisition module (6) is further included, and the data acquisition module (6) acquires data of the acquired device through the 485 interface and transmits the acquired data to the routing module (1) through the LAN3 interface (521) and the LAN4 interface (522).
4. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 2, wherein: the data acquisition module (6) comprises a power supply module (61), a main control chip (62), a 485 acquisition module (63), a storage module (64), a clock module (65) and a display module (66);
the power supply module (61) supplies power to the main control chip (62), the 485 acquisition module (63), the storage module (64), the clock module (65) and the display module (66); the master control chip (62) is connected with the 485 acquisition module (63) through a serial port, and the 485 acquisition module (63) sends an acquisition command to the equipment to be acquired and reads acquired information; the main control chip (62) is connected with the clock module (65) and the storage module (64) through I2C, the main control chip (62) stores data information into the storage module (64), and the data information also comprises current time information provided by the clock module (65); the main control chip (62) is connected with the display module (66) through an I/O interface to display the normal operation state of the data acquisition module (6) and the communication state of the 485 acquisition module (63).
5. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 3, wherein: the 485 acquisition module (63) comprises 4 paths of 485 interfaces (7).
6. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 4, wherein: the 4-path 485 interface (7) is connected in parallel and is in electrical signal connection with the main control chip (62).
7. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 4, wherein: the 485 interface (7) comprises a signal isolation chip (71), a power isolation chip (72), a 485 chip (73) and a protection component (74), wherein the signal isolation chip (71) comprises a TLP2362, the power isolation chip (72) comprises a B _ S-3WR2, and the protection component (74) comprises a transient suppression diode; the signal isolation chip (71) converts an electric signal into an optical signal into an electric signal through TLP2362, the power isolation chip (72) realizes transformer coupling through B _ S-3WR2, the 485 chip converts a TTL protocol into a 485 protocol, the protection component (74) realizes protection of the 485 signal through a transient suppression diode, an instruction output by the main control chip completes signal conversion through the signal isolation chip (71), the converted signal is input into the 485 chip (73) for protocol conversion, and the protection component (74) outputs the converted signal to the adopted device; the collected data are transmitted back to the main control chip (62) through the protection component (74), the 485 chip and the signal isolation chip (71) in sequence.
8. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 6, wherein: the protection component (74) further comprises a discharge tube, a self-recovery fuse and a piezoresistor, one end of the piezoresistor is connected with the shell, the other end of the piezoresistor is connected with the 485 chip circuit, one end of the discharge tube is connected into the shell, the other end of the discharge tube is connected into the self-recovery fuse, and the self-recovery fuse is directly connected into the 485 chip circuit to prevent lightning stroke.
9. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 3, wherein: the 485 acquisition module (63) further comprises a 232 interface (8).
10. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 8, wherein: the 232 interface (8) is formed by replacing a 485 chip (73) in the 485 interface (7) with a 232 chip (81), and the rest components are the same as those of the 485 interface (7).
11. The data acquisition service-based dual-mode 4G public-private network online switching device according to claim 9, wherein: the protection component (84) further comprises a discharge tube, a self-recovery fuse and a piezoresistor, and lightning stroke is prevented;
a dual-mode 4G public and private network online switching method based on data acquisition service is characterized in that: the system comprises a routing module, a communication module, a main control chip, a power supply module, a network port module and a data acquisition module; the communication module comprises two SIM cards, wherein one SIM card is a public network card, and the other SIM card is a special network card;
the routing module is communicated with the communication module through a usb interface, private network information acquired by the communication module is read, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module is communicated with the private network through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal intensity does not reach the communication requirement threshold value, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network.
12. The on-line switching method of the dual-mode 4G public/private network based on the data acquisition service as claimed in claim 11, wherein: in an idle period of public network communication, the routing module controls a pin SIM _ CTLR to switch an SIM card to a special network card through a control switch module, special network information obtained by the communication module is read again, if the signal intensity of a special network reaches a communication requirement threshold value, the routing module carries out special network communication through the special network card, and the data acquisition module is linked with a server platform through the special network;
if the signal intensity does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is connected with the server platform through the public network, so that the detection and switching of the public and private networks in the idle period of the public network communication are realized.
13. The on-line switching method of the dual-mode 4G public/private network based on the data acquisition service as claimed in claim 11, wherein: under the condition of private network communication, the routing module reads private network information acquired by the communication module, if the signal intensity of the private network reaches a communication requirement threshold value, the routing module carries out private network communication through a private network card, and the data acquisition module is linked with the server platform through the private network;
if the signal strength does not reach the communication requirement threshold, the routing module controls the pin SIM _ CTLR through the control switch module to switch the SIM card to the public network card, the routing module performs public network communication through the public network card, and the data acquisition module is linked with the server platform through the public network, so that the detection of the poor private network communication signals is realized, and the network switching from the private network to the public network is realized under the condition that the private network communication signals are poor.
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