Far-end antenna state feedback circuit, feedback method and cabin host

Abstract

The invention provides a far-end antenna state feedback circuit, a feedback method and a cabin host. In the far-end antenna state feedback circuit, when a microcontroller unit MCU1 detects that an antenna state is a normal state, a microcontroller unit MCU2 receives a first signal; when the microcontroller unit MCU1 detects that the antenna state is an abnormal state, the switch unit is switched on, the radio frequency transceiver module TR1 is controlled to stop working, and meanwhile, the microcontroller unit MCU2 receives a second signal; the second signal is a signal with a preset duty ratio; wherein the microcontroller unit MCU2 is also used for outputting the current antenna state based on one of the received first signal and the received second signal. According to the invention, the existing communication line is fully utilized, so that the cost is reduced; and the state of the antenna is fed back by using the change of the signal and the duty ratio information, so that simple and effective state transmission is realized, the system complexity is reduced, and the reliability and maintainability of the system are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of feedback circuit, in particular to a remote antenna state feedback circuit, a feedback method and a cockpit host. BACKGROUND

[0002] The vehicle-mounted communication host is usually configured with two antennas, but the radio frequency cable has high loss to the radio frequency signal, if the two antennas are far away from the communication host, the signal strength of the radio frequency signal output by the communication host cannot meet the demand when the radio frequency signal reaches the antenna end through the radio frequency cable, so a compensator is usually configured at the remote antenna.

[0003] Due to the cost factor, only one radio frequency cable is usually used to transmit the radio frequency signal and power between the compensator and the communication host, and there is no UART communication between the two for mutual information exchange, so the communication host cannot obtain the antenna state of the remote antenna. SUMMARY

[0004] To solve the above technical problems, the present application provides a remote antenna state feedback circuit, a feedback method and a cockpit host, which can feedback the antenna state of the remote antenna between the remote antenna compensator and the communication host without UART communication.

[0005] Specifically, the present application provides a remote antenna state feedback circuit, at least comprising a compensator and a communication host connected by a radio frequency cable; the compensator at least comprises a microcontroller unit MCU1, a switching unit and a radio frequency transceiver module TR1; the communication host at least comprises a microcontroller unit MCU2 and a bus transceiver; wherein the microcontroller unit MCU1 is used to disconnect the switching unit when detecting that the antenna state of the remote antenna is a normal state, so that the microcontroller unit MCU2 receives a first signal, the microcontroller unit MCU1 is also used to turn on the switching unit and control the radio frequency transceiver module TR1 to stop working when detecting that the antenna state of the remote antenna belongs to an abnormal state, and at the same time the microcontroller unit MCU2 receives a second signal; the second signal is a signal with a preset duty cycle; and the microcontroller unit MCU2 is also used to output the current antenna state based on one of the received first signal and second signal.

[0006] In the technical scheme, through the simple circuit, the normal state and the abnormal state of the antenna are fed back to the host by the compensator through the original radio frequency cable without adding extra communication cable or complex communication interaction circuit, and then the host informs the vehicle owner of the antenna state in time so that the vehicle owner can repair the fault in time; wherein, the compensator and the communication host are connected through the radio frequency cable, the existing communication line is fully utilized, extra communication cable is avoided, and the cost is reduced; the antenna state is fed back by using the change of the level signal and the duty cycle information, simple and effective state transmission is realized, the system complexity is reduced, and the reliability and maintainability of the system are improved.

[0007] Further, the compensator further comprises a first filter circuit, a second filter circuit and a resistor R1; a P1 port, a P2 port and a P3 port of the microcontroller unit MCU1 are connected with the first filter circuit, a radio frequency transceiver module TR1 and the resistor R1 respectively; the radio frequency transceiver module TR1 is further connected with the first filter circuit and the second filter circuit respectively; the other end of the resistor R1 is connected with the switch unit.

[0008] In the technical scheme, the first filter circuit and the second filter circuit can isolate the radio frequency signal and the direct current signal, improve the quality and stability of signal transmission; and the resistor R1 is used for controlling the current of the switch unit to ensure that the switch unit can work normally.

[0009] Further, the compensator further comprises a resistor R2; one end of the resistor R2 is connected with the switch unit, and the other end is connected with the second filter circuit.

[0010] In the technical scheme, the resistor R2 is used for limiting the current of the switch unit to protect the switch unit from overload damage.

[0011] Further, the communication host further comprises a third filter circuit; the third filter circuit is connected with the second filter circuit through a radio frequency cable.

[0012] In the technical scheme, the third filter circuit isolates the radio frequency signal and the direct current signal to prevent the signals from entering other circuits.

[0013] Further, the communication host further comprises a V2X network connection module and a voltage dividing circuit; a P4 port, a P5 port and a P6 port of a microcontroller unit MCU2 are connected with the voltage dividing circuit, the V2X network connection module and a bus transceiver respectively; the voltage dividing circuit is further connected with the third filter circuit and grounded at the other end; and the network connection module is further connected with the third filter circuit and a target antenna respectively.

[0014] In the technical scheme, the voltage dividing circuit provides a suitable input level for the micro controller unit MCU2; and the V2X networking module is used for realizing communication and data transmission with the target antenna, and realizing the function of the system.

[0015] Further, the communication host further comprises a power supply; and the power supply is connected to the third filter circuit.

[0016] In the technical scheme, a stable power supply is provided for the whole communication host, so that the circuit elements can work normally.

[0017] Based on the same concept, the application further provides a remote antenna state feedback method, comprising the following steps: detecting an antenna state of a remote antenna by a micro controller unit MCU1; when the antenna state is detected as a normal state, receiving a first signal by a micro controller unit MCU2; when the antenna state is detected as an abnormal state, turning on the switch unit by the micro controller unit MCU1, and receiving a second signal by the micro controller unit MCU2; the second signal is a signal with a preset duty cycle; and outputting the current antenna state to a cockpit host for display by the micro controller unit MCU2 based on one of the received first signal and second signal.

[0018] In the technical scheme, the remote antenna state feedback method is simple and direct, and realizes real-time detection and feedback of the antenna state by using a simple circuit structure, without the need for complex algorithms and additional communication equipment.

[0019] Further, when the antenna state is detected as an abnormal state, the method further comprises: controlling a radio frequency transceiver module TR1 to stop working by the micro controller unit MCU1; and the method further comprises: when the micro controller unit MCU1 detects that the antenna state returns to a normal state, controlling the radio frequency transceiver module TR1 to return to a normal working state by the micro controller unit MCU1.

[0020] In the technical scheme, when the antenna is abnormal, the work of the radio frequency transceiver module TR1 is stopped in time, so as to avoid interference and damage of abnormal signals to the system; and when the antenna state returns to normal, the work of the radio frequency transceiver module TR1 is restored in time, so as to ensure that the system can work normally.

[0021] Further, the abnormal state at least comprises an open circuit state and a short circuit state, and the method further comprises: setting the preset duty cycle in advance; and the open circuit state is set as a first duty cycle, and the short circuit state is set as a second duty cycle.

[0022] In the technical solution, different duty cycles are used to distinguish the abnormal states such as open circuit and short circuit, so that the MCU 2 can accurately determine the specific abnormal state of the antenna, and the accuracy and reliability of the state feedback are improved.

[0023] Based on the same concept, the application also provides a cockpit host connected with the remote antenna state feedback circuit, which is used to receive and display the antenna state fed back by the remote antenna state feedback circuit.

[0024] Compared with the prior art, the application has the following beneficial effects: The application makes full use of the existing communication line to reduce the cost, and uses the change of the signal and the duty cycle information to feed back the antenna state, so that simple and effective state transmission is realized, the system complexity is reduced, and the reliability and maintainability of the system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The application provides a remote antenna state feedback circuit.

[0026] Figure 2 The application provides a remote antenna state feedback circuit.

[0027] Figure 3 The application provides a remote antenna state feedback circuit. DETAILED DESCRIPTION

[0028] The application provides a remote antenna state feedback circuit, a feedback method and a cockpit host, which will be described in detail below in combination with specific embodiments and drawings.

[0029] Please refer to Figure 1 The application provides a remote antenna state feedback circuit, which at least includes a compensator and a communication host connected through a radio frequency cable; the compensator at least includes a microcontroller unit MCU1, a switching unit and a radio frequency transceiver module TR1; the communication host at least includes a microcontroller unit MCU2 and a bus transceiver; wherein the microcontroller unit MCU1 is used to disconnect the switching unit when detecting that the antenna state of the remote antenna is a normal state, so that the microcontroller unit MCU2 receives a first signal; the microcontroller unit MCU1 is also used to turn on the switching unit and control the radio frequency transceiver module TR1 to stop working when detecting that the antenna state of the remote antenna belongs to an abnormal state, and at the same time, the microcontroller unit MCU2 receives a second signal; the second signal is a signal with a preset duty cycle; and the microcontroller unit MCU2 is also used to output the current antenna state based on one of the received first signal and second signal.

[0030] In some embodiments, the compensator and the communication host transmit radio frequency signals through only one radio frequency cable, and the communication host supplies power to the compensator through this radio frequency cable. It should be noted that the compensator is, for example, an radio frequency signal compensator, and the communication host is, for example, a vehicle-to-everything (V2X) host. The antennas connected to the vehicle-to-everything (V2X) host need to consider the radio frequency signal coverage. Generally, one V2X antenna is installed at the front of the vehicle, such as near the rearview mirror, and another at the rear of the vehicle, such as at the shark fin antenna position. However, since V2X operates in the 5.9 GHz frequency band, the radio frequency cable has high loss of radio frequency signals. If the two antennas are far from the V2X host, the signal strength of the radio frequency signal output by the host will not meet the requirements when it reaches the antenna end through the radio frequency cable. To solve this problem, the compensator is usually placed at the antenna end that is far from the host (i.e., the far-end antenna) to compensate for the loss of signal caused by the radio frequency cable, so that the radio frequency signal strength transmitted by the far-end antenna meets the requirements.

[0031] It should be noted that the switching unit is, for example, a semiconductor switching transistor or a MOSFET (such as...). Figure 2 The transistor Q1 in the transceiver is an example of a CAN (Controller Area Network) transceiver. CAN bus is a serial communication protocol with strong anti-interference capabilities. In complex electromagnetic environments such as automobiles, antenna status feedback information needs to be transmitted stably and reliably. The differential signal transmission method of CAN bus can effectively resist electromagnetic interference, ensure the accuracy of data transmission, reduce the bit error rate, and ensure that the microcontroller unit MCU2 can accurately send the antenna status information to the cockpit host. Furthermore, CAN bus supports multi-node communication; multiple devices can be connected in a CAN network. In automotive electronic systems, besides the antenna status feedback circuit, there may be many other sensors and actuators that need to communicate. Using a CAN bus transceiver facilitates the integration of the antenna status feedback circuit into the entire automotive electronic network, enabling collaborative work with other devices.

[0032] Furthermore, it should be noted that the duty cycle refers to the ratio of the duration of the high level to the total cycle time within a pulse cycle; for example, a duty cycle of 30% means that the high level time accounts for 30% of the total cycle time in a complete pulse cycle.

[0033] Further, the compensator further comprises a first filter circuit, a second filter circuit and a resistor R1; a P1 port, a P2 port and a P3 port of the microcontroller unit MCU1 are connected to the first filter circuit, a radio frequency transceiver module TR1 and the resistor R1 respectively; the radio frequency transceiver module TR1 is further connected to the first filter circuit and the second filter circuit respectively; the other end of the resistor R1 is connected to the switching unit.

[0034] In some embodiments, as shown in the figure, the first filter circuit comprises an inductor L1 and a capacitor C1, and the second filter circuit comprises an inductor L2 and a capacitor C2; one end of the inductor L1 is connected to the P1 port of the microcontroller unit MCU1, and the other end is connected to the far-end antenna and the capacitor C1 respectively; the radio frequency transceiver module TR1 is further connected to the other end of the capacitor C1 and the capacitor C2 respectively; the other end of the resistor R1 is connected to the base of the switching unit. Figure 2

[0035] It should be noted that the P3 port of the microcontroller unit MCU1 is, for example, a PWM (Pulse Width Modulation) port; wherein PWM is a widely used signal modulation method, and many microcontroller units are built-in with PWM function modules, and the use of the PWM port can facilitate the connection and communication with other devices having a PWM interface, facilitating the expansion and upgrading of the system.

[0036] In the above technical solution, the inductor L1, the inductor L2, the capacitor C1 and the capacitor C2 constitute a filter and isolation circuit, which can isolate the radio frequency signal and the direct current signal, and improve the quality and stability of signal transmission; the resistor R1 is used to control the base current of the switching unit, so as to ensure that the switching unit can work normally.

[0037] Further, the compensator further comprises a resistor R2; one end of the resistor R2 is connected to the switching unit, and the other end is connected to the second filter circuit.

[0038] In some embodiments, the emitter of the switching unit is grounded, and the collector is connected to the resistor R2; the other end of the resistor R2 is connected to the inductor L2.

[0039] It should be noted that the circuit composed of the resistor R1, the resistor R2, the switching unit and the inductor L2 is used to send the antenna state of the far-end antenna.

[0040] In the above technical solution, the resistor R2 is used to limit the current of the collector of the switching unit, so as to protect the switching unit from overload damage; the inductor L2 plays a role of isolation and filtering, so as to prevent the radio frequency signal from entering the subsequent circuit.

[0041] ​Further, the communication host further comprises a third filter circuit; the third filter circuit is connected with the second filter circuit through a radio frequency cable.

[0042] In some embodiments, the third filter circuit comprises an inductor L3 and a capacitor C3; the other end of the inductor L2 is connected with the capacitor C2, and then connected with the capacitor C3 and the inductor L3 through a radio frequency cable.

[0043] In the above technical solution, the inductor L3 and the capacitor C3 isolate the radio frequency signal and the direct current signal, preventing the signal from entering other circuits.

[0044] Further, the communication host further comprises a network connection module and a voltage dividing circuit; the P4 port, the P5 port and the P6 port of the microcontroller unit MCU2 are connected with the voltage dividing circuit, the V2X network connection module and the bus transceiver respectively; the voltage dividing circuit is further connected with the third filter circuit and grounded at the other end; the network connection module is further connected with the third filter circuit and the target antenna respectively.

[0045] In some embodiments, the voltage dividing circuit comprises a resistor R3 and a resistor R4; the P4 port of the microcontroller unit MCU2 is connected with any position of the resistor R3 and the resistor R4; the other end of the resistor R3 is connected with the inductor L3; the other end of the resistor R4 is grounded; the network connection module is further connected with the other end of the capacitor C3 and the target antenna respectively.

[0046] It should be noted that the circuit composed of the inductor L3, the resistor R3 and the resistor R4 is used to receive the antenna state of the remote antenna; the V2X network connection module realizes the all-round information interaction between the vehicle and the outside world, including the communication between the vehicle and the vehicle (V2V), the vehicle and the infrastructure (V2I), the vehicle and the pedestrian (V2P), etc., in the antenna state feedback system, the V2X network connection module can send the antenna state information to the cloud or other related vehicles and infrastructure in time, so as to realize higher intelligent traffic application, for example, when the antenna of a vehicle is abnormal, the surrounding vehicles and the traffic management department can obtain the information in time and take corresponding measures to improve the traffic safety and efficiency; further, the P4 port of the controller unit MCU2 is, for example, a PWM port, in this embodiment, the P4 port is mainly used for signal input.

[0047] In the above technical solution, the resistor R3 and the resistor R4 constitute a voltage dividing circuit to provide a suitable input level for the MCU2; the V2X network connection module is used to realize the communication and data transmission with the target antenna, and realize the function of the system.

[0048] Further, the communication host further comprises a power supply; the power supply is connected with the third filter circuit.

[0049] In some embodiments, the power source is connected to any point of the capacitor C3 and the inductor L3.

[0050] In the above technical solution, stable power supply is provided for the entire communication host, and normal operation of each circuit element is ensured.

[0051] The remote antenna state feedback circuit described in the present application works as follows: When the remote antenna is in a normal state, i.e., the remote antenna connected to the compensator does not have an open circuit or a short circuit, the P3 port of the compensator end microcontroller unit MCU1 connected to the resistor R1 outputs a low-level signal, at this time the switch unit is not turned on, and the P4 port of the microcontroller unit MCU2 in the communication host inputs a +V high level (i.e., the first signal, the level signal mainly comes from the power supply), indicating that the remote antenna is normal, further, the P6 port of the microcontroller unit MCU2 sends the antenna normal information to the cabin host through the CAN bus transceiver, and the cabin host displays that the current remote antenna is in a normal state through the display screen.

[0052] Further, when the microcontroller unit MCU1 at the compensator end detects that the remote antenna has an open circuit fault (i.e., the antenna state is an open circuit state), the P3 port of the microcontroller unit MCU1 outputs a high-level signal (i.e., the second signal) to drive the switch unit to be turned on, wherein the high-level signal output by the P3 port of the microcontroller unit MCU1 can be set to a certain duty cycle, for example, the duty cycle can be set to 30%, and at the same time the microcontroller unit MCU1 will control the radio frequency transceiver module TR1 to stop working through the P2 port; when the P4 port of the microcontroller unit MCU2 at the communication host end detects a signal with a duty cycle of 30% from the radio frequency cable, it can be judged that the antenna has an open circuit fault, and at the same time the microcontroller unit MCU2 sends the open circuit information of the remote antenna to the cabin host through the CAN bus transceiver, and the cabin host displays that the current remote antenna is in an open circuit state through the display screen.

[0053] The duty cycle of the high-level signal output by the P3 port of the microcontroller unit MCU1 can be simulated by a software timer and an interrupt, or a hardware PWM module can be used.

[0054] Method one: in the microcontroller unit MCU1, the duty cycle of the high-level signal output by the P3 port is set to a specific value (such as 30%), first the PWM module needs to be initialized, such as configuring the working mode, clock source, period, etc. of the PWM module, and then the duty cycle of the PWM signal is set by writing a specific register.

[0055] The second mode: can be realized by means of timer and pulse width modulation function, wherein the role of the timer is to generate accurate time reference, so as to determine the period and high level duration of the PWM signal; then in the timer interrupt service function, according to the requirement of duty cycle to control the level state of P3 port, and in the main function, call the timer initialization function to enter an infinite loop waiting for interrupt.

[0056] It should be noted that the above which mode is adopted depends on the MCU model and development environment, and is usually selected by the person skilled in the art according to the actual application requirement; if P3 port and P4 port are both PWM ports, the first mode is preferred.

[0057] Further, when the microcontroller unit MCU1 at the compensator end detects that the remote antenna appears a short circuit fault (i.e. the antenna state is a short circuit state), the P3 port of the microcontroller unit MCU1 outputs a high level signal (i.e. the second signal) to drive the switch unit to be turned on, wherein the high level signal output by the P3 port of the microcontroller unit MCU1 can be set to a certain duty cycle, for example, the duty cycle can be set to 70%, and at the same time the microcontroller unit MCU1 will control the radio frequency transceiver module TR1 to stop working through the P2 port; when the P4 port of the microcontroller unit MCU2 at the communication host end detects a signal with a duty cycle of 70% from the radio frequency cable, it can be judged that the antenna appears a short circuit fault, and at the same time the microcontroller unit MCU2 sends the short circuit information of the remote antenna to the cabin host through the CAN bus transceiver, and the cabin host displays the current remote antenna in the short circuit state through the display screen.

[0058] In summary, the present application can realize the feedback of the normal state and abnormal state of the antenna from the compensator to the host through the original radio frequency cable based on a simple circuit without adding additional communication cable or complex communication interaction circuit, and then the host informs the vehicle owner of the antenna state in time so that he can repair the fault in time; wherein the compensator and the communication host are connected through the radio frequency cable, which makes full use of the existing communication line, avoids adding additional communication cable and reduces the cost; the antenna state is fed back by using the change of the level signal and the duty cycle information, which realizes simple and effective state transmission, reduces the system complexity, and further improves the reliability and maintainability of the system.

[0059] Based on the same concept, please refer to Figure 3The application also provides a remote antenna state feedback method, comprising the following steps: detecting an antenna state of a remote antenna by a microcontroller unit MCU1; wherein when the antenna state is detected as a normal state, a first signal is received by a microcontroller unit MCU2; when the antenna state is detected as an abnormal state, the switch unit is turned on by the microcontroller unit MCU1, and a second signal is received by the microcontroller unit MCU2; the second signal is a signal with a preset duty cycle; and the current antenna state is output to a cockpit host for display by the microcontroller unit MCU2 based on one of the received first signal and second signal.

[0060] Further, the abnormal state at least includes an open circuit state and a short circuit state, and also includes: the preset duty cycle is set in advance; wherein the open circuit state is set as a first duty cycle, and the short circuit state is set as a second duty cycle.

[0061] In some embodiments, a technician sets the duty cycle of the microcontroller unit MCU1 output level signal according to actual needs; preferably, the open circuit state is set as, for example, 30%, and the short circuit state is set as, for example, 70%.

[0062] In other embodiments, the microcontroller unit MCU1 and the microcontroller unit MCU2 are also initialized and configured to ensure that they can work normally, and the CAN bus transceiver is initialized to realize communication with the cockpit host.

[0063] In the above technical solution, different duty cycles are used to distinguish the open circuit and short circuit abnormal states, so that the microcontroller unit MCU2 can accurately determine the specific abnormal state of the antenna, and the accuracy and reliability of state feedback are improved.

[0064] Further, when the antenna state is detected as an abnormal state, the method also comprises: the radio frequency transceiver module TR1 is controlled to stop working by the microcontroller unit MCU1; wherein the method also comprises: when the microcontroller unit MCU1 detects that the antenna state returns to the normal state, the radio frequency transceiver module TR1 is controlled to return to the normal working state by the microcontroller unit MCU1.

[0065] In some embodiments, after the car starts, the microcontroller unit MCU1 starts to detect the state of the remote antenna in real time. When the remote antenna is in a normal state, i.e., no open circuit or short circuit occurs, the microcontroller unit MCU1 connects the P3 port of the resistor R1 to output a low-level signal. Due to the low-level signal output by the P3 port, the switch unit is not turned on, and the P4 port of the microcontroller unit MCU2 in the communication host machine inputs a +V high-level signal. Further, after the microcontroller unit MCU2 detects the high-level signal input by the P4 port, it is judged that the remote antenna is normal. Then the microcontroller unit MCU2 sends the antenna normal information to the cabin host machine through the CAN bus transceiver. After the cabin host machine receives the antenna normal information, it displays that the current remote antenna is in a normal state through the display screen, and the owner can use the antenna related functions with confidence.

[0066] During the driving of the car, if the microcontroller unit MCU1 detects that the remote antenna has an open circuit fault, the P3 port of the microcontroller unit MCU1 outputs a high-level signal, and the duty cycle of the high-level signal is 30% which is set in advance. The high-level signal drives the switch unit to be turned on. At this time, the signal with a 30% duty cycle is transmitted to the communication host machine end through the radio frequency cable. At the same time, the microcontroller unit MCU1 controls the radio frequency transceiver module TR1 to stop working through the P2 port, so as to avoid interference and damage to the system caused by abnormal signals. Further, when the P4 port of the microcontroller unit MCU2 of the communication host machine end detects the signal with a 30% duty cycle from the radio frequency cable, it is judged that the antenna has an open circuit fault. The microcontroller unit MCU2 sends the open circuit information of the remote antenna to the cabin host machine through the CAN bus transceiver. After the cabin host machine receives the open circuit information, it displays that the current remote antenna is in an open circuit state through the display screen, reminding the owner to repair the fault in time.

[0067] When the microcontroller unit MCU1 detects that the remote antenna has a short circuit fault, the P3 port of the microcontroller unit MCU1 outputs a high-level signal with a duty cycle of 70% which is set in advance. The high-level signal drives the switch unit to be turned on, and the signal with a 70% duty cycle is transmitted to the communication host machine end through the radio frequency cable. The microcontroller unit MCU1 also controls the radio frequency transceiver module TR1 to stop working through the P2 port. Further, when the P4 port of the microcontroller unit MCU2 of the communication host machine end detects the signal with a 70% duty cycle, it is judged that the antenna has a short circuit fault. The microcontroller unit MCU2 sends the short circuit information of the remote antenna to the cabin host machine through the CAN bus transceiver. After the cabin host machine receives the short circuit information, it displays that the current remote antenna is in a short circuit state through the display screen, reminding the owner to handle it as soon as possible.

[0068] Further, when the vehicle owner repairs the antenna fault, the microcontroller unit MCU1 detects that the antenna state returns to the normal state, and the microcontroller unit MCU1 controls the radio frequency transceiver module TR1 to return to the normal working state through the P2 port; at the same time, the P3 port of the microcontroller unit MCU1 outputs a low-level signal, and the P4 port of the microcontroller unit MCU2 of the communication host receives the +V high level again, judges that the antenna returns to the normal state, and sends the normal information to the cabin host, and the cabin host updates the display screen information to display that the antenna is normal.

[0069] In the above technical solution, when the antenna is abnormal, the work of the radio frequency transceiver module TR1 is stopped in time, avoiding interference and damage of abnormal signals to the system; when the antenna state returns to normal, the work of the radio frequency transceiver module TR1 is restored in time, ensuring that the system can operate normally.

[0070] In summary, the remote antenna state feedback method is simple and direct, and the real-time detection and feedback of the remote antenna state are realized by using a simple circuit structure and level signal change, without complex algorithms and additional communication equipment, effectively reducing the system cost and improving the reliability and maintainability of the system.

[0071] Based on the same concept, the present application also provides a cabin host connected with the remote antenna state feedback circuit (as shown in Figures 1-2 The cabin host is used for receiving and displaying the antenna state fed back by the remote antenna state feedback circuit.

[0072] Although the example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application. Those of ordinary skill in the art can make various changes and modifications without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0073] It should be noted that, in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0074] While the application has been described in connection with specific embodiments thereof, it will be understood that it is capable of further modifications and this application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.

Claims

1. A remote antenna status feedback circuit, characterized in that, It includes at least a compensator and a communication host connected via an RF cable; The compensator includes at least a microcontroller unit MCU1, a switching unit, and an RF transceiver module TR1; the communication host includes at least a microcontroller unit MCU2 and a bus transceiver. The microcontroller unit MCU1 is used to disconnect the switching unit when the antenna status of the remote antenna is detected to be normal, so that the microcontroller unit MCU2 receives a first signal. The microcontroller unit MCU1 is also used to turn on the switching unit and control the radio frequency transceiver module TR1 to stop working when the antenna status of the remote antenna is detected to be abnormal. At the same time, the microcontroller unit MCU2 receives a second signal; the second signal is a signal with a preset duty cycle. Furthermore, the microcontroller unit MCU2 is also used to output the current antenna state based on one of the received first signal and second signal.

2. The remote antenna status feedback circuit according to claim 1, characterized in that, The compensator also includes a first filter circuit, a second filter circuit, and a resistor R1; The P1 port, P2 port and P3 port of the microcontroller unit MCU1 are respectively connected to the first filter circuit, the radio frequency transceiver module TR1 and the resistor R1; The radio frequency transceiver module TR1 is also connected to the first filter circuit and the second filter circuit respectively; The other end of the resistor R1 is connected to the switching unit.

3. The remote antenna status feedback circuit according to claim 2, characterized in that, The compensator also includes a resistor R2; one end of the resistor R2 is connected to the switching unit, and the other end is connected to the second filter circuit.

4. The remote antenna status feedback circuit according to claim 3, characterized in that, The communication host also includes a third filtering circuit; the third filtering circuit is connected to the second filtering circuit via an RF cable.

5. The remote antenna status feedback circuit according to claim 4, characterized in that, The communication host also includes a V2X network module and a voltage divider circuit; The P4, P5 and P6 ports of the microcontroller unit MCU2 are respectively connected to the voltage divider circuit, the V2X network module and the bus transceiver. The voltage divider circuit is also connected to the third filter circuit, and the other end is grounded; The network module is also connected to the third filter circuit and the target antenna.

6. The remote antenna status feedback circuit according to claim 4, characterized in that, The communication host also includes a power supply; the power supply is connected to the third filtering circuit.

7. A feedback method employing the remote antenna state feedback circuit as described in any one of claims 1-6, characterized in that, Includes the following steps: The antenna status of the remote antenna is detected by the microcontroller unit MCU1; When the antenna is detected to be in a normal state, a first signal is received through the microcontroller unit MCU2; When an abnormal antenna state is detected, the microcontroller unit MCU1 turns on the switching unit and receives a second signal through the microcontroller unit MCU2; the second signal is a signal with a preset duty cycle. Additionally, the microcontroller unit MCU2 outputs the current antenna status to the cockpit main unit for display based on one of the received first and second signals.

8. The feedback method according to claim 7, characterized in that, When the antenna state is detected to be abnormal, the following is also included: The microcontroller unit MCU1 controls the radio frequency transceiver module TR1 to stop working. This also includes: when the microcontroller unit MCU1 detects that the antenna state has returned to normal, the microcontroller unit MCU1 controls the radio frequency transceiver module TR1 to return to normal working state.

9. The feedback method according to claim 7, characterized in that, The abnormal states include at least open circuit and short circuit states, and also include: The preset duty cycle is set in advance; Specifically, the open circuit state is set to the first duty cycle, and the short circuit state is set to the second duty cycle.

10. A cockpit main engine, characterized in that, The cockpit main unit is connected to the remote antenna status feedback circuit according to any one of claims 1-6, and the cockpit main unit is used to receive and display the antenna status fed back by the remote antenna status feedback circuit.

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