Antenna detection system based on vehicle-mounted 5G C-V2X terminal

Abstract

The utility model discloses an antenna detection system based on a vehicle-mounted 5G C-V2X terminal. The antenna detection system comprises an external antenna, an internal antenna, a 5G C-V2X module, an antenna detection module and an antenna switching module. The 5G C-V2X module is used for controlling the antenna detection module to perform polling detection on a plurality of AD levels, analyzing received AD sampling data and judging whether an external antenna is short-circuited or not; the antenna detection module is used for receiving a signal of the 5G C-V2X module, detecting a plurality of external antennas in a polling mode, and transmitting detected AD sampling data to the 5G C-V2X module; and the antenna switching module is used for receiving the external antenna abnormal signal sent by the 5G C-V2X module, and switching the external antenna into the internal antenna through the RF SWITCH radio frequency chip. According to the utility model, AD sampling data of a plurality of antennas can be detected in a polling mode, whether the antennas are in open and short circuit states can be judged, the built-in antennas can be switched through the RF SWITCH chip, and normal functions of mobile communication can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic information, and in particular to an antenna detection system based on a vehicle-mounted 5G C-V2X terminal. Background Art

[0002] At present, the application of 5G C-V2X terminals in automotive electronics has a large number of antennas and high requirements for antenna connection reliability. The passive antenna of the terminal generally uses a resistor voltage divider to detect the open and short circuit of the antenna. The open and short circuit method of the active antenna on the terminal generally uses current detection, using a current detection resistor, and also converting it into a voltage signal. In this way, each antenna needs an ADC interface. The current on-board 5G module or SOC chip generally has only one or two interfaces, but the number of antennas we need to detect is ≥ 8, and the general module cannot provide so many ADC interfaces; at the same time, in the case of a car body collision, if the external antenna of the car body fails, the 5G terminal cannot provide a signal due to the damage of the antenna device, which will affect the vehicle rescue. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an antenna detection system based on a vehicle-mounted 5G C-V2X terminal. The AD sampling data of multiple antennas can be detected by polling, and it can be determined whether the antenna is in an open or short circuit state. The built-in antenna can be switched through the RF SWITCH chip to ensure the normal function of mobile communications.

[0004] The purpose of the utility model is achieved as follows: an antenna detection system based on a vehicle-mounted 5G C-V2X terminal, comprising an external antenna, a built-in antenna, a 5G C-V2X module, an antenna detection module and an antenna switching module;

[0005] The 5G C-V2X module is used to control the antenna detection module to perform polling detection on multiple AD levels, and analyze the received AD sampling data to determine whether the external antenna is short-circuited. When the external antenna is in an open-short circuit state, the antenna switching module is controlled to switch the external antenna to the terminal's built-in antenna;

[0006] The antenna detection module is used to receive the signal of the 5G C-V2X module, detect multiple external antennas by polling, and transmit the detected AD sampling data to the 5G C-V2X module;

[0007] The antenna switching module is used to receive an external antenna abnormality signal sent by the 5G C-V2X module, and switch the external antenna to the internal antenna through the RFSWITCH radio frequency chip;

[0008] The antenna detection module includes an external antenna detection module and an antenna polling detection module. The external antenna detection module is used to receive 5G signals and V2X signals from the external antenna, and transmit the multi-channel antenna signals to the 5G C-V2X module through a Π-type filtering circuit; the antenna polling detection module is used to detect the multi-channel AD levels of the external antenna, and transmit the detected AD sampling data to the 5G C-V2X module.

[0009] Furthermore, the 5G C-V2X module is electrically connected to the antenna detection module and the antenna switching module respectively; the external antenna detection module is electrically connected to the antenna polling detection module.

[0010] Furthermore, the external antenna detection module includes the external antenna 5G signal receiving ends 5G_RF_ANT1, 5G_RF_ANT2, 5G_RF_ANT3, 5G_RF_ANT4 and AD signal output ends ANT_RF_ADC1, ANT_RF_ADC2, ANT_RF_ADC3 and ANT_RF_ADC4; and the external antenna V2X signal receiving ends MAIN_RF_CV2X0, DIV_RF_CV2X1 and AD signal output ends ANT_CV2X0_ADC1, ANT_CV2X1_ADC2.

[0011] Furthermore, the antenna polling detection module is a multiplexer switch, including S0 and S1 tubes and AD level polling output interfaces 5G_ADC1 and 5G_ADC2, and the AD level polling output interfaces 5G_ADC1 and 5G_ADC2 are connected to the ADC interface of the 5G C-V2X module.

[0012] Furthermore, the antenna switching module is a radio frequency switch, including an external antenna signal terminal 5G_RF_ANT1 and an internal antenna signal terminal ANT_MAIN_INTERNAL; the external antenna is connected to the 5G C-V2X module through the external antenna signal terminal 5G_RF_ANT1.

[0013] When the utility model is working, the 5G C-V2X module controls the antenna detection module to poll multiple AD levels to detect the open and short circuit states of the antenna. When the external antenna is in the open and short circuit states, the 5G C-V2X module controls the antenna switching module to switch the external antenna to the terminal's built-in antenna.

[0014] The utility model adopts the above technical solution, and compared with the prior art, the beneficial effects are as follows: the antenna detection module can detect the AD sampling data of multiple antennas through a multiplexing chip and polling, and judge whether the antenna is in an open or short circuit state. After detecting a fault, a fault code can be generated or the owner can be prompted with the specific antenna fault location, which solves the problem of insufficient AD sampling in the antenna detection circuit; at the same time, the antenna detection circuit solves the problem that when the vehicle body collides with the outside and the antenna component is damaged, after detecting the open or short circuit state of the external antenna through AD sampling, the internal antenna can be switched through the RF SWITCH chip of the antenna switching module to ensure the normal function of mobile communication. This application is very important in the scene of emergency rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 System block diagram of the utility model.

[0016] Figure 2 Schematic diagram of the 5G C-V2X module circuit of the utility model.

[0017] Figure 3 Circuit schematic diagram of the antenna switching module of the utility model.

[0018] Figure 4 Circuit schematic diagram of the external antenna detection module of the utility model.

[0019] Figure 5 Circuit schematic diagram of the antenna polling detection module of the utility model. DETAILED DESCRIPTION

[0020] like Figure 1-5 An antenna detection system based on a vehicle-mounted 5G C-V2X terminal is shown, comprising an external antenna, a built-in antenna, a 5G C-V2X module, an antenna detection module and an antenna switching module;

[0021] like Figure 2 As shown, the 5G C-V2X module is used to control the antenna detection module to poll multiple AD levels and analyze the received AD sampling data to determine whether the external antenna is short-circuited. When the external antenna is in an open-short circuit state, the antenna switching module is controlled to switch the external antenna to the terminal's built-in antenna; the 5G C-V2X module adopts a 5G module.

[0022] The antenna detection module is used to receive the signal of the 5G C-V2X module, detect multiple external antennas by polling, and transmit the detected AD sampling data to the 5G C-V2X module;

[0023] The antenna detection module includes an external antenna detection module and an antenna polling detection module. The external antenna detection module is used to receive 5G signals and V2X signals from the external antenna, and transmit the multi-channel antenna signals to the 5G C-V2X module through a Π-type filtering circuit; the antenna polling detection module is used to detect the multi-channel AD levels of the external antenna, and transmit the detected AD sampling data to the 5G C-V2X module.

[0024] like Figure 4 As shown, the external antenna detection module includes the external antenna 5G signal receiving ends 5G_RF_ANT1, 5G_RF_ANT2, 5G_RF_ANT3, 5G_RF_ANT4 and AD signal output ends ANT_RF_ADC1, ANT_RF_ADC2, ANT_RF_ADC3 and ANT_RF_ADC4; and the external antenna V2X signal receiving ends MAIN_RF_CV2X0, DIV_RF_CV2X1 and AD signal output ends ANT_CV2X0_ADC1, ANT_CV2X1_ADC2.

[0025] like Figure 5 As shown, the antenna polling detection module is a multiplexer switch, including S0 and S1 tubes and AD level polling output interfaces 5G_ADC1 and 5G_ADC2, and the AD level polling output interfaces 5G_ADC1 and 5G_ADC2 are connected to the ADC interface of the 5G C-V2X module; the antenna polling detection module adopts the chip 74HC4052D.

[0026] The antenna switching module is used to receive the external antenna abnormality signal sent by the 5G C-V2X module, and switch the external antenna to the internal antenna through the RF SWITCH radio chip; Figure 3 As shown, the antenna switching module is a radio frequency switch, including an external antenna signal terminal 5G_RF_ANT1 and an internal antenna signal terminal ANT_MAIN_INTERNAL; the external antenna is connected to the 5G C-V2X module through the external antenna signal terminal 5G_RF_ANT1; the antenna switching module adopts the SKYA21003 chip.

[0027] The 5G C-V2X module is electrically connected to the antenna detection module and the antenna switching module respectively; the external antenna detection module is electrically connected to the antenna polling detection module.

[0028] When the utility model works, the working principle of the antenna designs the detection circuit of the active wire and the passive antenna, and each antenna will eventually output an AD level signal.

[0029] The external 5G signal is input to the terminal through the vehicle antenna socket J7. The four RF signals are 5G_RF_ANT1, 5G_RF_ANT2, 5G_RF_ANT3, and 5G_RF_ANT4. The four antenna signals are input to the 5G module U7 through the Π-type filter circuit. The 5G_1V8 power supply supplies power to the external antenna through a diode, a voltage divider resistor, and a filter inductor. A voltage signal is obtained through the voltage divider resistor 10K. The four AD signals are ANT_RF_ADC1, ANT_RF_ADC2, ANT_RF_ADC3, and ANT_RF_ADC4.

[0030] The external V2X signal is input to the terminal through the vehicle antenna socket J16. The two RF signals are MAIN_RF_CV2X0 and DIV_RF_CV2X1. Similarly, the 5G_1V8 power supply supplies power to the external antenna through a diode, a voltage divider resistor and a filter inductor. A voltage signal is obtained through the voltage divider resistor 10K. The two AD signals are ANT_CV2X0_ADC1 and ANT_CV2X1_ADC2 respectively.

[0031] There are six channels for 5G and V2X RF antenna level check. The 5G module (5G C-V2X module) U7 has only two ADC interfaces. The external antenna detection module transmits the six signals of ANT_RF_ADC1, ANT_RF_ADC2, ANT_RF_ADC3, ANT_RF_ADC4, ANT_CV2X0_ADC1, and ANT_CV2X1_ADC2 to the antenna polling detection module U28. The antenna polling detection module U28 uses 74HC4052D, which is a multiplexer switch. The 5G module controls the S0 and S1 pin levels of the antenna polling detection module to control the six-channel AD level polling output to the interfaces 5G_ADC1 and 5G_ADC2 of the antenna polling detection module. The interfaces 5G_ADC1 and 5G_ADC2 are connected to the two ADC interfaces of the 5G module. The 5G C-V2X module detects the level through AD to determine the open and short circuit status of the antenna.

[0032] The external antenna signal 5G_RF_ANT1 and the internal antenna signal ANT_MAIN_INTERNAL are connected to the antenna switching module U27 SKYA21003. The antenna switching module U27 is a RF switch. When the external antenna is working normally, 5G_RF_ANT1 is connected to the 5G module (5G C-V2X module) through the antenna switching module U27. When the external antenna is abnormal, the signal of the 5G module is switched to the internal antenna ANT_MAIN_INTERNAL through the antenna switching module U27.

[0033] When the 5G module detects that the external antenna is open or short-circuited, it can prompt the car owner on the terminal application. In the event of an emergency collision, when the 5G module detects that the external antenna is open or short-circuited, it switches to the internal antenna through the antenna switching module, and the system can make an emergency call.

[0034] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. An antenna detection system based on a vehicle-mounted 5G C-V2X terminal, characterized in that: Includes external antenna, internal antenna, 5G C-V2X module, antenna detection module and antenna switching module; The 5G C-V2X module is used to control the antenna detection module to perform polling detection on multiple AD levels, and analyze the received AD sampling data to determine whether the external antenna is short-circuited. When the external antenna is in an open-short circuit state, the antenna switching module is controlled to switch the external antenna to the terminal's built-in antenna; The antenna detection module is used to receive the signal of the 5G C-V2X module, detect multiple external antennas by polling, and transmit the detected AD sampling data to the 5G C-V2X module; The antenna switching module is used to receive an external antenna abnormality signal sent by the 5G C-V2X module, and switch the external antenna to the internal antenna through the RF SWITCH radio frequency chip; The antenna detection module includes an external antenna detection module and an antenna polling detection module. The external antenna detection module is used to receive 5G signals and V2X signals from the external antenna, and transmit the multi-path antenna signals to the 5GC-V2X module through a Π-type filtering circuit; The antenna polling detection module is used to detect the multi-channel AD levels of the external antenna and transmit the detected AD sampling data to the 5G C-V2X module.

2. According to claim 1, an antenna detection system based on a vehicle-mounted 5G C-V2X terminal is characterized in that: The 5G C-V2X module is electrically connected to the antenna detection module and the antenna switching module respectively; the external antenna detection module is electrically connected to the antenna polling detection module.

3. According to claim 1, an antenna detection system based on a vehicle-mounted 5G C-V2X terminal is characterized in that: The external antenna detection module includes the external antenna 5G signal receiving ends 5G_RF_ANT1, 5G_RF_ANT2, 5G_RF_ANT3, 5G_RF_ANT4 and AD signal output ends ANT_RF_ADC1, ANT_RF_ADC2, ANT_RF_ADC3 and ANT_RF_ADC4; and the external antenna V2X signal receiving ends MAIN_RF_CV2X0, DIV_RF_CV2X1 and AD signal output ends ANT_CV2X0_ADC1, ANT_CV2X1_ADC2.

4. The antenna detection system based on a vehicle-mounted 5G C-V2X terminal according to claim 1 is characterized in that: The antenna polling detection module is a multiplex switch, including S0 and S1 tubes and AD level polling output interfaces 5G_ADC1 and 5G_ADC2. The AD level polling output interfaces 5G_ADC1 and 5G_ADC2 are connected to the ADC interface of the 5G C-V2X module.

5. The antenna detection system based on a vehicle-mounted 5G C-V2X terminal according to claim 1 is characterized in that: The antenna switching module is a radio frequency switch, including an external antenna signal terminal 5G_RF_ANT1 and an internal antenna signal terminal ANT_MAIN_INTERNAL; the external antenna is connected to the 5G C-V2X module through the external antenna signal terminal 5G_RF_ANT1.

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