CN212727262U - Multi-node wireless network serial port transparent transmission system - Google Patents
Multi-node wireless network serial port transparent transmission system Download PDFInfo
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- CN212727262U CN212727262U CN202021820746.4U CN202021820746U CN212727262U CN 212727262 U CN212727262 U CN 212727262U CN 202021820746 U CN202021820746 U CN 202021820746U CN 212727262 U CN212727262 U CN 212727262U
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Abstract
The utility model relates to a multi-node wireless network serial port unvarnished transmission system, which comprises a control center and a plurality of wireless network serial port nodes connected with the control center, wherein, one wireless network serial port node is directly connected with the control center, and the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center; the wireless network serial port node comprises a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module and a serial port module connected with the serial port network module; the wireless network serial port nodes are wirelessly connected with each other through a serial port network module and a radio frequency front end module connected to the serial port network module through a peer-to-peer network. The utility model discloses can realize passing needs thoroughly between a plurality of serial ports node, improve the serial ports and pass the accommodation thoroughly.
Description
Technical Field
The utility model relates to a pass the system thoroughly, especially a multinode wireless network serial ports pass system thoroughly belongs to the serial ports and passes the technical field thoroughly.
Background
The serial port is a very general equipment communication protocol on a computer, is a communication mode commonly used by a current embedded system and an upper computer, is widely applied to industrial control, such as RS485 of an electric energy meter, infrared communication and communication of a main control chip, and the like, and is connected and communicated with the main control chip in a serial port mode.
Even if the data content is transmitted through the serial port, the conventional serial port transparent transmission can only transmit among 2 nodes, and the actual serial port transparent transmission requirement is difficult to meet.
Disclosure of Invention
The utility model aims at overcoming the not enough of existence among the prior art, providing a multi-node wireless network serial ports passes system thoroughly, its can realize passing needs thoroughly between a plurality of serial ports node, improves the adaptation scope that the serial ports passed thoroughly.
According to the technical scheme provided by the utility model, the multi-node wireless network serial port transparent transmission system comprises a control center and a plurality of wireless network serial port nodes connected with the control center, wherein, one wireless network serial port node is directly connected with the control center, and the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center;
the wireless network serial port node comprises a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module and a serial port module connected with the serial port network module; the wireless network serial port nodes are wirelessly connected with each other through a serial port network module and a radio frequency front end module connected to the serial port network module through a peer-to-peer network.
The radio frequency front end module comprises a power amplifier and a low noise amplifier, the power amplifier can be connected with the serial port network module, the low noise amplifier is connected with the serial port network module, the power amplifier is connected with a radio frequency switch through a low pass filter, the radio frequency switch is connected with the low noise amplifier through a band pass filter, and a radio frequency antenna is arranged on the radio frequency switch.
The serial port network module adopts a chip with the model number of AR9344, and works in an Adhoc mode; the power amplifier adopts a chip with the model of SE5004, the low-noise amplifier adopts a chip with the model of BFP740F, and the power amplifier and the low-noise amplifier are both controlled by the enabling of the serial port network module.
The serial port module comprises a USB-serial port circuit connected with the serial port network module, a level conversion circuit connected with the USB-serial port circuit and a surge protection circuit connected with the level conversion circuit, and the serial port module is connected with the serial port network module through the USB-serial port circuit.
The USB-serial port circuit comprises a serial port conversion chip U1, the serial port conversion chip U1 is a chip with the model number FT232, the CBUS0 end of the serial port conversion chip U1 is connected with the cathode end of a light emitting diode DS2, the anode end of the light emitting diode DS2 is connected with a voltage VCC5V0 through a resistor R2, the CBUS1 end of the serial port conversion chip U1 is connected with the cathode end of the light emitting diode DS1, and the anode end of the light emitting diode DS1 is connected with a voltage VCC5V0 through a resistor R1;
the VCCIO end and the 3V3OUT end of the serial port conversion chip U1 are connected with one end of a capacitor C1 and one end of a capacitor C2, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded, the VCC end of the serial port conversion chip U1 is connected with one end of a resistor R3, a voltage VCC5V0, one end of a magnetic bead B1, one end of a capacitor C3 and one end of a capacitor C4, the other end of the resistor R3 is connected with a RESET # end of the serial port conversion chip U1, the other end of the capacitor C3 and the other end of the capacitor C4 are grounded, and the other end of the magnetic bead B1 is connected with a voltage 5V _ CON; the USBDM end and the USBDP end of the serial port conversion chip U1 are respectively connected with the USB _ DM and the USB _ DP of the USB interface through a common-mode inductor L1.
The level conversion circuit comprises a level conversion chip U2, the level conversion chip U2 adopts a chip with the model of MAX3232, the R2OUT end of the level conversion chip U2 is connected with the RXD end of the serial port conversion chip U1, and the T2IN end of the level conversion chip U2 is connected with the TXD end of the serial port conversion chip U1; the C1+ end of the level conversion chip U2 is connected with one end of a capacitor C5, and the other end of the capacitor C5 is connected with the C1-end of the level conversion chip U2;
the C2+ end of the level conversion chip U2 is connected with one end of a capacitor C6, the other end of the capacitor C6 is connected with the C2-end of the level conversion chip U2, the V + end of the level conversion chip U2 is connected with one end of a capacitor C7, the V-end of the level conversion chip U2 is connected with one end of a capacitor C8, and the other end of the capacitor C7 and the other end of the capacitor C8 are grounded; the VCC terminal of the level shift chip U2 is connected to the voltage VCC5V0, one terminal of the capacitor C9, and one terminal of the capacitor C10, and the other terminal of the capacitor C9, the other terminal of the capacitor C10, and the GND terminal of the level shift chip U2 are all grounded.
The surge protection circuit comprises a transient suppression diode D1, a transient suppression diode D2 and a transient suppression diode D3, wherein one end of the transient suppression diode D1, one end of the transient suppression diode D2 and one end of a self-recovery fuse F1 are connected with an R2IN end of a level conversion chip U2, the other end of the transient suppression diode D1, one end of the transient suppression diode D3 and one end of the self-recovery fuse F2 are connected with a T2OUT end of the level conversion chip U2, and the other end of the transient suppression diode D2 and the other end of the transient suppression diode D3 are grounded;
the other end of the self-recovery fuse F1 is connected with the second end of the gas discharge tube G1 and the second end of the serial port connector J1, the other end of the self-recovery fuse F2 is connected with the first end of the gas discharge tube G1 and the third end of the serial port connector J1, and the grounding end of the gas discharge tube G1 and the first end of the serial port connector J1 are both grounded; the serial port connector J1 adopts a connector with the model number B3B-XH-A.
The utility model has the advantages that: a wireless network serial port node is directly connected with the control center, and the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center; the wireless network serial port node comprises a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module and a serial port module connected with the serial port network module; between wireless network serial port nodes, the radio frequency front end module connected to the serial port network module through the serial port network module can be wirelessly connected with each other through a peer-to-peer network, so that the transparent transmission requirement among a plurality of serial port nodes can be realized, and the application range of the transparent transmission of the serial port is improved.
Drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is a schematic diagram of the instruction format in transparent transmission according to the present invention.
Fig. 3 is a flowchart of the present invention.
Fig. 4 is the structure block diagram of the wireless network serial port node of the utility model.
Fig. 5 is a block diagram of the rf front-end module according to the present invention.
Fig. 6 is a schematic circuit diagram of the USB-serial port circuit of the present invention.
Fig. 7 is a schematic circuit diagram of the level shift circuit of the present invention.
Fig. 8 is a schematic circuit diagram of the surge protection circuit of the present invention.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
As shown in fig. 1: in order to realize the transparent transmission requirement among a plurality of serial port nodes and improve the adaptation range of the transparent transmission of the serial port, the utility model discloses a control center and a plurality of wireless network serial port nodes connected with the control center, wherein, a wireless network serial port node is directly connected with the control center, and the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center;
the wireless network serial port node comprises a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module and a serial port module connected with the serial port network module; the wireless network serial port nodes are wirelessly connected with each other through a serial port network module and a radio frequency front end module connected to the serial port network module through a peer-to-peer network.
Specifically, the control center can be a computer or other equipment, the control center can realize serial port transparent transmission of data through a plurality of wireless network serial port nodes, and the wireless network serial port nodes adopt the same structural form, wherein the control center is directly connected with the wireless network serial port nodes, all the wireless network serial port nodes can be wirelessly connected, that is, the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center.
In fig. 1, the control center is connected with the wireless network serial port node 1, the wireless network serial port node 1 is not connected with the serial port device, the wireless network serial port node 2-the wireless network serial port node N can be wirelessly connected with the wireless network serial port node 1, the serial port device 2 can be connected with the wireless network serial port node 2 through a serial port, the serial port device 3 is connected with the wireless network serial port node 3 through a serial port, and the rest is analogized in sequence, and the description is omitted here. Specifically, N may be 100 max.
All the networked wireless network serial port nodes have unique ID numbers, the command center can send instructions to any serial port device through a wireless network, and the instruction format is shown in figure 2, wherein:
the source equipment number is the wireless network serial port node 1, the destination equipment number is the ID number of the wireless network serial port node which needs to receive the instruction, the instruction length refers to the length of the serial port instruction, the original serial port instruction is the original control instruction sent by the control center, the CRC checksum is the check value of the data sent at this time, and the accuracy of data sending can be checked to a certain extent.
After the command center sends out a command, all wireless network serial port nodes in the wireless network can receive the command, all wireless network serial port nodes can analyze the command, and if the target equipment number in the command is matched with the ID number of the command, the analyzed original serial port command is transmitted to the serial port equipment at the rear end; and if the destination device number in the command does not match with the own device number, abandoning the original serial port command, as shown in fig. 3.
As shown in fig. 4, the wireless network serial port node includes a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module, and a serial port module connected with the serial port network module; the wireless network serial port nodes are wirelessly connected with each other through a serial port network module and a radio frequency front end module connected to the serial port network module through a peer-to-peer network. In the embodiment of the utility model, when the wireless network serial port node is connected with the control center, the wireless network serial port node is connected with the control center through the serial port module; when the wireless network serial port node is connected with the serial port equipment, the wireless network serial port node is connected with the serial port equipment through the serial port module.
As shown in fig. 5, the radio frequency front end module includes a power amplifier capable of being connected to the serial port network module and a low noise amplifier connected to the serial port network module, the power amplifier is connected to a radio frequency switch through a low pass filter, the radio frequency switch is connected to the low noise amplifier through a band pass filter, and a radio frequency antenna is disposed on the radio frequency switch.
In the embodiment of the utility model, the serial port network module adopts a chip with model number AR9344, and the serial port network module works in an Adhoc mode; the power amplifier adopts a chip with the model of SE5004, the low-noise amplifier adopts a chip with the model of BFP740F, and the power amplifier and the low-noise amplifier are both controlled by the enabling of the serial port network module.
Specifically, the serial port network module selects an AR9344 WLAN SoC of Qualcomm company, establishes a wireless network by using an internal IEEE 802.11 MAC/baseband/radio frequency, and is interconnected with external equipment by using a high-speed serial port of the serial port network module, such as an unmanned aerial vehicle and an unmanned vehicle. Because 802.11 has very high transmission bandwidth and the data volume of the serial port is very small, the method only introduces very small transmission delay. The embodiment of the utility model provides an in, AR9344 work is under the Adhoc mode, peer-to-peer network promptly, as long as have the same channel, channel bandwidth, SSID, then arbitrary node can all realize network intercommunication, very convenient to use.
In addition, an SE5004 of Skyworks is used as a power amplifier, harmonic waves are suppressed through a low-pass filter and then are transmitted into an audio switch, and finally the harmonic waves are transmitted outwards through a radio-frequency antenna; the radio frequency signals coupled by the radio frequency antenna are gated by the radio frequency switch, frequency selection is firstly carried out by the band-pass filter, the required signals are screened out, and then the signals are sent to the low-noise amplifier to improve the signal intensity. The power amplifier and the low noise amplifier can be controlled to be turned on or turned off through the serial port network module.
Furthermore, the serial port module comprises a USB-serial port circuit connected with the serial port network module, a level conversion circuit connected with the USB-serial port circuit and a surge protection circuit connected with the level conversion circuit, and the serial port module is connected with the serial port network module through the USB-serial port circuit.
The embodiment of the utility model provides an in, serial port module utilizes USB-serial ports circuit to realize being connected with serial ports network module's USB, can realize being connected with control center or serial devices through surge protection circuit.
As shown in fig. 6, the USB-serial port circuit includes a serial port conversion chip U1, the serial port conversion chip U1 is a chip with a model number FT232, a CBUS0 terminal of the serial port conversion chip U1 is connected to a cathode terminal of a light emitting diode DS2, an anode terminal of the light emitting diode DS2 is connected to a voltage VCC5V0 through a resistor R2, a CBUS1 terminal of the serial port conversion chip U1 is connected to a cathode terminal of the light emitting diode DS1, and an anode terminal of the light emitting diode DS1 is connected to a voltage VCC5V0 through a resistor R1;
the VCCIO end and the 3V3OUT end of the serial port conversion chip U1 are connected with one end of a capacitor C1 and one end of a capacitor C2, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded, the VCC end of the serial port conversion chip U1 is connected with one end of a resistor R3, a voltage VCC5V0, one end of a magnetic bead B1, one end of a capacitor C3 and one end of a capacitor C4, the other end of the resistor R3 is connected with a RESET # end of the serial port conversion chip U1, the other end of the capacitor C3 and the other end of the capacitor C4 are grounded, and the other end of the magnetic bead B1 is connected with a voltage 5V _ CON; the USBDM end and the USBDP end of the serial port conversion chip U1 are respectively connected with the USB _ DM and the USB _ DP of the USB interface through a common-mode inductor L1.
As shown in fig. 7, the level shift circuit includes a level shift chip U2, the level shift chip U2 is a chip with a model of MAX3232, an R2OUT terminal of the level shift chip U2 is connected to an RXD terminal of the serial port shift chip U1, and a T2IN terminal of the level shift chip U2 is connected to a TXD terminal of the serial port shift chip U1; the C1+ end of the level conversion chip U2 is connected with one end of a capacitor C5, and the other end of the capacitor C5 is connected with the C1-end of the level conversion chip U2;
the C2+ end of the level conversion chip U2 is connected with one end of a capacitor C6, the other end of the capacitor C6 is connected with the C2-end of the level conversion chip U2, the V + end of the level conversion chip U2 is connected with one end of a capacitor C7, the V-end of the level conversion chip U2 is connected with one end of a capacitor C8, and the other end of the capacitor C7 and the other end of the capacitor C8 are grounded; the VCC terminal of the level shift chip U2 is connected to the voltage VCC5V0, one terminal of the capacitor C9, and one terminal of the capacitor C10, and the other terminal of the capacitor C9, the other terminal of the capacitor C10, and the GND terminal of the level shift chip U2 are all grounded.
As shown in fig. 8, the surge protection circuit includes a transient suppression diode D1, a transient suppression diode D2, and a transient suppression diode D3, wherein one end of the transient suppression diode D1, one end of the transient suppression diode D2, and one end of the self-recovery fuse F1 are connected to the R2IN end of the level conversion chip U2, the other end of the transient suppression diode D1, one end of the transient suppression diode D3, and one end of the self-recovery fuse F2 are connected to the T2OUT end of the level conversion chip U2, and the other end of the transient suppression diode D2 and the other end of the transient suppression diode D3 are grounded;
the other end of the self-recovery fuse F1 is connected with the second end of the gas discharge tube G1 and the second end of the serial port connector J1, the other end of the self-recovery fuse F2 is connected with the first end of the gas discharge tube G1 and the third end of the serial port connector J1, and the grounding end of the gas discharge tube G1 and the first end of the serial port connector J1 are both grounded; the serial port connector J1 adopts a connector with the model number B3B-XH-A.
The embodiment of the utility model provides an in, serial ports conversion chip U1, level conversion chip U2, gas discharge tube G1, serial port joint J1 etc. homoenergetic obtain through purchasing the mode outward, can obtain RS232 serial ports level through level conversion chip U2. The voltage VCC5V0 and the voltage 5V _ CON are both 5V voltages, and the magnetic bead B1 can suppress EMI (electromagnetic interference).
Claims (7)
1. A multi-node wireless network serial port transparent transmission system is characterized in that: the wireless network serial port node comprises a control center and a plurality of wireless network serial port nodes connected with the control center, wherein one wireless network serial port node is directly connected with the control center, and the rest wireless network serial port nodes can be wirelessly connected with the control center through the wireless network serial port nodes directly connected with the control center;
the wireless network serial port node comprises a serial port network module capable of establishing wireless connection, a radio frequency front end module connected with the serial port network module and a serial port module connected with the serial port network module; the wireless network serial port nodes are wirelessly connected with each other through a serial port network module and a radio frequency front end module connected to the serial port network module through a peer-to-peer network.
2. The multi-node wireless network serial port transparent transmission system according to claim 1, characterized in that: the radio frequency front end module comprises a power amplifier and a low noise amplifier, the power amplifier can be connected with the serial port network module, the low noise amplifier is connected with the serial port network module, the power amplifier is connected with a radio frequency switch through a low pass filter, the radio frequency switch is connected with the low noise amplifier through a band pass filter, and a radio frequency antenna is arranged on the radio frequency switch.
3. The multi-node wireless network serial port transparent transmission system according to claim 2, characterized in that: the serial port network module adopts a chip with the model number of AR9344, and works in an Adhoc mode; the power amplifier adopts a chip with the model of SE5004, the low-noise amplifier adopts a chip with the model of BFP740F, and the power amplifier and the low-noise amplifier are both controlled by the enabling of the serial port network module.
4. The multi-node wireless network serial port transparent transmission system according to claim 1, characterized in that: the serial port module comprises a USB-serial port circuit connected with the serial port network module, a level conversion circuit connected with the USB-serial port circuit and a surge protection circuit connected with the level conversion circuit, and the serial port module is connected with the serial port network module through the USB-serial port circuit.
5. The multi-node wireless network serial port transparent transmission system according to claim 4, wherein: the USB-serial port circuit comprises a serial port conversion chip U1, the serial port conversion chip U1 is a chip with the model number FT232, the CBUS0 end of the serial port conversion chip U1 is connected with the cathode end of a light emitting diode DS2, the anode end of the light emitting diode DS2 is connected with a voltage VCC5V0 through a resistor R2, the CBUS1 end of the serial port conversion chip U1 is connected with the cathode end of the light emitting diode DS1, and the anode end of the light emitting diode DS1 is connected with a voltage VCC5V0 through a resistor R1;
the VCCIO end and the 3V3OUT end of the serial port conversion chip U1 are connected with one end of a capacitor C1 and one end of a capacitor C2, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded, the VCC end of the serial port conversion chip U1 is connected with one end of a resistor R3, a voltage VCC5V0, one end of a magnetic bead B1, one end of a capacitor C3 and one end of a capacitor C4, the other end of the resistor R3 is connected with a RESET # end of the serial port conversion chip U1, the other end of the capacitor C3 and the other end of the capacitor C4 are grounded, and the other end of the magnetic bead B1 is connected with a voltage 5V _ CON; the USBDM end and the USBDP end of the serial port conversion chip U1 are respectively connected with the USB _ DM and the USB _ DP of the USB interface through a common-mode inductor L1.
6. The multi-node wireless network serial port transparent transmission system according to claim 5, wherein: the level conversion circuit comprises a level conversion chip U2, the level conversion chip U2 adopts a chip with the model of MAX3232, the R2OUT end of the level conversion chip U2 is connected with the RXD end of the serial port conversion chip U1, and the T2IN end of the level conversion chip U2 is connected with the TXD end of the serial port conversion chip U1; the C1+ end of the level conversion chip U2 is connected with one end of a capacitor C5, and the other end of the capacitor C5 is connected with the C1-end of the level conversion chip U2;
the C2+ end of the level conversion chip U2 is connected with one end of a capacitor C6, the other end of the capacitor C6 is connected with the C2-end of the level conversion chip U2, the V + end of the level conversion chip U2 is connected with one end of a capacitor C7, the V-end of the level conversion chip U2 is connected with one end of a capacitor C8, and the other end of the capacitor C7 and the other end of the capacitor C8 are grounded; the VCC terminal of the level shift chip U2 is connected to the voltage VCC5V0, one terminal of the capacitor C9, and one terminal of the capacitor C10, and the other terminal of the capacitor C9, the other terminal of the capacitor C10, and the GND terminal of the level shift chip U2 are all grounded.
7. The multi-node wireless network serial port transparent transmission system according to claim 6, wherein: the surge protection circuit comprises a transient suppression diode D1, a transient suppression diode D2 and a transient suppression diode D3, wherein one end of the transient suppression diode D1, one end of the transient suppression diode D2 and one end of a self-recovery fuse F1 are connected with an R2IN end of a level conversion chip U2, the other end of the transient suppression diode D1, one end of the transient suppression diode D3 and one end of the self-recovery fuse F2 are connected with a T2OUT end of the level conversion chip U2, and the other end of the transient suppression diode D2 and the other end of the transient suppression diode D3 are grounded;
the other end of the self-recovery fuse F1 is connected with the second end of the gas discharge tube G1 and the second end of the serial port connector J1, the other end of the self-recovery fuse F2 is connected with the first end of the gas discharge tube G1 and the third end of the serial port connector J1, and the grounding end of the gas discharge tube G1 and the first end of the serial port connector J1 are both grounded; the serial port connector J1 adopts a connector with the model number B3B-XH-A.
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