Active antenna fault detection circuit and method, vehicle domain controller and vehicle

Abstract

The invention discloses an active antenna fault detection circuit and method, a vehicle domain controller and a vehicle. The circuit comprises a power supply end; the power supply circuit comprises a switching tube, a first resistor and an inductor, the power supply end is connected with one end of the switching tube, and the other end of the switching tube is connected with the antenna through the first resistor and the inductor which are sequentially connected in series; the detection circuit comprises a voltage division circuit, a processor and a comparator, the middle point of the voltage division circuit is connected with the in-phase end of the comparator, the common end of the first resistor and the inductor is connected with the anti-phase end of the comparator, the anti-phase end of the comparator is connected with the detection end of the processor for inputting a detection signal, and the processor is connected with the control end of the switching tube; wherein the processor inputs the detection signal to the fault prediction model for fault prediction to obtain a fault prediction result, and controls the state of the switch tube according to the fault prediction result. And the short-earth fault of the active antenna can be accurately and rapidly identified.

Description

Technical Field

[0001] This application relates to the field of antennas, and in particular to an active antenna fault detection circuit, method, vehicle domain controller, and vehicle. Background Technology

[0002] In the automotive field, active antennas are mainly used to receive broadcast signals, satellite navigation signals (such as GPS and BeiDou), and vehicle-to-everything (V2X) communication signals. Existing vehicle active antenna diagnostic circuit technologies present various approaches and suffer from the following problems: Poor adaptability to complex environments: During vehicle operation, vehicles will encounter various complex electromagnetic environments. For example, when passing near high-voltage substations or communication base stations, strong external electromagnetic interference can easily cause existing diagnostic circuits to make misjudgments based on signal strength and spectrum analysis, making it impossible to accurately determine the true working status of the antenna.

[0003] Poor real-time performance: Most existing diagnostic circuits cannot achieve true real-time diagnostics. They often only perform tests after the antenna has been operating for a period of time or when the diagnostic program is manually triggered. This results in the inability to detect faults in time when they occur, affecting the normal use of vehicle-related functions (such as navigation and communication).

[0004] In summary, among the relevant technologies, the fault diagnosis of active antennas on vehicles suffers from low accuracy and poor real-time performance. Summary of the Invention

[0005] This application proposes an active antenna fault detection circuit, method, vehicle domain controller, and vehicle, which can accurately and quickly identify short-ground faults in active antennas.

[0006] According to the active antenna fault detection circuit of the first aspect of this application, an antenna is connected, and the circuit includes: The power supply side is used to provide power. A power supply circuit, comprising a switching transistor, a first resistor, and an inductor, wherein the power supply terminal is connected to one end of the switching transistor, and the other end of the switching transistor is connected to the antenna via the first resistor and the inductor connected in series. The detection circuit includes a voltage divider circuit, a processor, and a comparator. The other end of the switching transistor is grounded through the voltage divider circuit. The midpoint of the voltage divider circuit is connected to the non-inverting input of the comparator. The common terminal of the first resistor and the inductor is connected to the inverting input of the comparator. The inverting input of the comparator is connected to the detection terminal of the processor for inputting a detection signal. The processor is connected to the control terminal of the switching transistor. The processor inputs the detection signal to the fault prediction model to perform fault prediction and obtain the fault prediction result, and controls the state of the switching transistor according to the fault prediction result.

[0007] According to some embodiments of this application, the power supply circuit further includes a transient voltage suppression diode, and the antenna is grounded through the transient voltage suppression diode.

[0008] According to some embodiments of this application, the power supply circuit further includes a first capacitor and a second capacitor connected in parallel, and the common terminal of the first resistor and the inductor is grounded through the first capacitor and the second capacitor connected in parallel.

[0009] The active antenna fault detection method according to a second aspect of this application is applied to a processor of the active antenna fault detection circuit as described in the first aspect embodiment, the method comprising: Receive detection signals; The detection signal is input into the fault prediction model to perform fault prediction and obtain the fault prediction result. Specifically, when the detection signal is at a high level, the fault prediction result is a short-to-ground fault.

[0010] According to some embodiments of this application, after inputting the detection signal into the fault prediction model to obtain the fault prediction result, the method further includes: Acquire multi-source vehicle data; Vehicle status information is obtained by performing feature extraction and pattern recognition on multi-source vehicle data. The vehicle status information and the fault prediction results are input into the antenna status evaluation model to obtain the antenna status evaluation results.

[0011] According to some embodiments of this application, after inputting the detection signal into the fault prediction model to obtain the fault prediction result, the method further includes: If the fault prediction result is a short-ground fault, an antenna shutdown command is generated, which is used to control the switch to disconnect.

[0012] The vehicle domain controller according to a third aspect of this application includes an active antenna fault detection circuit as described in the first aspect embodiment.

[0013] The vehicle according to the fourth aspect of this application includes a vehicle domain controller as described in the third aspect of the embodiment.

[0014] The active antenna fault detection circuit, method, vehicle domain controller, and vehicle according to the embodiments of this application have at least the following beneficial effects: In this embodiment, a power supply circuit is set between the power supply terminal and the antenna. During normal operation, the processor controls the switch to close, and the power supply at the power supply terminal supplies power to the antenna through a first resistor and an inductor connected in series. The comparator in the detection circuit receives the midpoint voltage of the voltage divider circuit and the common terminal voltage of the first resistor and inductor, respectively. When a short-to-ground fault occurs in the antenna, the common terminal voltage of the first resistor and inductor is pulled low. At this time, the detection signal output by the comparator is high. The processor inputs the detection signal to the fault prediction model to perform fault prediction and obtain the fault prediction result. When a ground fault is determined, the switch is immediately controlled to open to avoid hardware burnout. This application can accurately and quickly identify short-to-ground faults in active antennas.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a circuit diagram of the active antenna fault detection circuit in an embodiment of this application. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] Reference Figure 1As shown, an active antenna fault detection circuit is connected to the antenna, and the circuit includes: The power supply terminal VCC is used to provide power. The power supply circuit includes a switching transistor Q1, a first resistor R1 and an inductor L1. The power supply terminal VCC is connected to one end of the switching transistor Q1, and the other end of the switching transistor Q1 is connected to the antenna through the first resistor R1 and the inductor L1 connected in series. The detection circuit includes a voltage divider circuit, a processor, and a comparator. The other end of the switching transistor Q1 is grounded through the voltage divider circuit. The midpoint of the voltage divider circuit is connected to the non-inverting input of the comparator. The common terminal of the first resistor R1 and the inductor L1 is connected to the inverting input of the comparator. The inverting input of the comparator is connected to the detection terminal of the processor for input detection signal. The processor is connected to the control terminal of the switching transistor Q1. The processor inputs the detection signal to the fault prediction model to predict the fault and obtain the fault prediction result, and controls the state of the switch Q1 according to the fault prediction result.

[0022] In this embodiment, a power supply circuit is set between the power supply terminal VCC and the antenna. During normal operation, the processor controls the switch to close, and the power supply VCC supplies power to the antenna through the first resistor R1 and inductor L1 connected in series. The comparator in the detection circuit is input with the midpoint voltage of the voltage divider circuit and the common terminal voltage of the first resistor R1 and inductor L1 respectively. When a short-to-ground fault occurs in the antenna, the common terminal voltage of the first resistor R1 and inductor L1 is pulled low. At this time, the detection signal output by the comparator is high. The processor inputs the detection signal to the fault prediction model to perform fault prediction and obtain the fault prediction result. When a ground fault is determined, the switch is immediately controlled to open to avoid hardware burnout. This application can accurately and quickly identify short-to-ground faults in active antennas.

[0023] Specifically, in this embodiment, the antenna is connected to the antenna signal input terminal RF_INPUT via capacitor C3. In this embodiment, the switching transistor Q1 is a MOSFET, but other switching devices such as a switching chip can also be used. The processor's ANT_OFF pin is connected to the gate of the switching transistor Q1. The gate of the switching transistor Q1 is also connected to the power supply terminal VCC via resistor R4. The power supply terminal VCC is connected to the drain of the switching transistor Q1. The source of the switching transistor Q1 is connected to the antenna via a first resistor R1 and an inductor L1 connected in series. The first resistor R1 and the inductor L1 together form an LR bias network, providing a stable DC operating power supply for the antenna. The common terminal of the first resistor R1 and the inductor L1 is designated as point A, which is connected to the inverting input of the comparator. The voltage divider circuit includes resistors R2 and R3 connected in series. The source of the switching transistor Q1 is grounded via resistors R2 and R3 connected in series. The common terminal of resistors R2 and R3 is designated as point B, which is connected to the non-inverting input of the comparator. The output of the comparator is connected to the processor's Detect pin to input a detection signal.

[0024] In this embodiment, the fault prediction model refers to a large AI model built using deep learning algorithms, or a prediction model built using other algorithms. Based on the fault prediction model, rapid and accurate fault diagnosis can be performed.

[0025] The workflow of this embodiment is as follows: During normal operation, the processor controls the switching transistor Q1 by pulling the ANT_OFF pin low, causing Q1 to conduct. The power supply VCC powers the antenna through the first resistor R1 and inductor L1, and simultaneously passes through the first resistor R1 to the inverting input of the comparator. This input is compared with the signal obtained after voltage division by the resistors to obtain state T1 (VA>VB). The detection signal output by the comparator is fed back to the processor through the Detect pin, and the processor inputs it into the fault prediction model for diagnosis. When a short-to-ground fault occurs in the antenna, point A is momentarily pulled low. Due to the presence of the first resistor R1, point B will maintain its original voltage. At this time, the comparator will obtain state T2 (VB>VA). The comparison signal of state T2 is fed back to the processor through the Detect pin for diagnosis. If a short-circuit fault is identified, the processor controls ANT_OFF to go high, turning off the switching transistor Q1, completing the circuit diagnosis. Simultaneously, the fault is recorded and fed back upwards. The processor's internal AI algorithm updates the data synchronously, providing it to the fault prediction model for deep learning.

[0026] In some implementations, the power supply circuit also includes a transient voltage suppression diode D1, and the antenna is grounded through the transient voltage suppression diode D1.

[0027] In this embodiment, a transient voltage suppression diode D1 is placed between the antenna and the ground to achieve surge protection and further improve safety.

[0028] In some implementations, the power supply circuit also includes a first capacitor C1 and a second capacitor C2 connected in parallel, and the common terminal of the first resistor R1 and the inductor L1 is grounded through the first capacitor C1 and the second capacitor C2 connected in parallel.

[0029] In this embodiment, the common terminal of the first resistor R1 and the inductor L1 is grounded through the first capacitor C1 and the second capacitor C2 connected in parallel. Compared with using only one capacitor, the parallel connection of multiple capacitors can extend the effective decoupling / bypass frequency range, overcome the parasitic effect limitation of a single capacitor, and further improve the reliability of the circuit.

[0030] This application also relates to an active antenna fault detection method, applied to a processor of the active antenna fault detection circuit in the above embodiments, the method comprising: Receive detection signals; The detection signal is input into the fault prediction model to predict the fault and obtain the fault prediction result. Among them, when the detection signal is high, the fault prediction result is a short-to-ground fault.

[0031] Specifically, during a short-to-ground fault, point A is momentarily pulled low. Due to the presence of the first resistor R1, point B will maintain its original voltage. At this time, the comparator will obtain state T2 (VB>VA), so the fault prediction model can output the fault prediction result for a short-to-ground fault. It should be understood that when VA is greater than VB, although it means that no short-to-ground fault has occurred, the fault prediction model can still obtain other fault prediction results based on other input data, such as overvoltage, overcurrent, and undervoltage faults.

[0032] In some implementations, after inputting the detection signal into the fault prediction model to obtain the fault prediction result, the method may further include: Acquire multi-source vehicle data; Vehicle status information is obtained by performing feature extraction and pattern recognition on multi-source vehicle data. The vehicle status information and fault prediction results are input into the antenna status assessment model to obtain the antenna status assessment results.

[0033] In this embodiment, feature extraction and pattern recognition are performed on multi-source vehicle data to obtain vehicle status information. Then, the vehicle status information and fault prediction results are input into the antenna status assessment model to obtain the antenna status assessment result. By setting the antenna status assessment model in the processor and performing feature extraction and pattern recognition on multi-source vehicle data, real-time assessment of antenna health status and fault prediction can be achieved, reducing the impact of sudden faults on the system.

[0034] Specifically, the antenna status assessment model can be an AI model built using deep learning algorithms, or a predictive model built using other algorithms, which can accurately and quickly assess the antenna status.

[0035] In some implementations, after inputting the detection signal into the fault prediction model to obtain the fault prediction result, the method may further include: If the fault prediction result is a short-ground fault, an antenna shutdown command is generated, which is used to control the switch Q1 to disconnect.

[0036] In this embodiment, if the fault prediction result is a short-ground fault, an antenna shutdown command is generated. The antenna shutdown command is used to control the switch Q1 to disconnect, which can shut down the power supply to the antenna as soon as a short-ground fault occurs, thus avoiding hardware burnout.

[0037] This application also relates to a vehicle domain controller, including the active antenna fault detection circuit of the above embodiments.

[0038] This application also relates to a vehicle, including the vehicle domain controller described in the above embodiments. In this embodiment, the vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. The vehicle can also be a commercial vehicle, such as a van, bus, small truck, or large semi-trailer. The vehicle can be a gasoline-powered vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0039] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An active antenna fault detection circuit, characterized by The antenna is connected, and the circuit comprises: a power supply end for providing a power supply; a power supply circuit, the power supply circuit comprising a switch tube, a first resistor and an inductor, one end of the switch tube being connected to the power supply end, the other end of the switch tube being connected to the antenna through the first resistor and the inductor connected in series; a detection circuit, the detection circuit comprising a voltage dividing circuit, a processor and a comparator, the other end of the switch tube being connected to ground through the voltage dividing circuit, the midpoint of the voltage dividing circuit being connected to the non-inverting terminal of the comparator, the common terminal of the first resistor and the inductor being connected to the inverting terminal of the comparator, the inverting terminal of the comparator being connected to the detection terminal of the processor for inputting a detection signal, the processor being connected to the control terminal of the switch tube; wherein the processor inputs the detection signal to a fault prediction model for fault prediction to obtain a fault prediction result, and controls the state of the switch tube according to the fault prediction result.

2. The active antenna fault detection circuit of claim 1, wherein, The power supply circuit further comprises a transient voltage suppression diode, and the antenna is connected to ground through the transient voltage suppression diode.

3. The active antenna fault detection circuit of claim 1, wherein, The power supply circuit further comprises a first capacitor and a second capacitor connected in parallel, and the common terminal of the first resistor and the inductor is connected to ground through the first capacitor and the second capacitor connected in parallel.

4. An active antenna fault detection method, characterized by, The processor applied to the active antenna fault detection circuit of any one of claims 1 to 3, the method comprising: receiving a detection signal; inputting the detection signal to a fault prediction model for fault prediction to obtain a fault prediction result; wherein, in the case that the detection signal is a high level, the fault prediction result is a short ground fault.

5. The active antenna fault detection method of claim 4, wherein, After the detection signal is inputted to the fault prediction model for fault prediction to obtain the fault prediction result, the method further comprises: obtaining vehicle multi-source data; performing feature extraction and pattern recognition on the vehicle multi-source data to obtain vehicle state information; inputting the vehicle state information and the fault prediction result to an antenna state evaluation model to obtain an antenna state evaluation result.

6. The active antenna fault detection method of claim 4, wherein, After the detection signal is inputted to the fault prediction model for fault prediction to obtain the fault prediction result, the method further comprises: in the case that the fault prediction result is a short ground fault, generating an antenna closing command, the antenna closing command being used for controlling the switch tube to be disconnected.

7. A vehicle domain controller, characterized by The active antenna fault detection circuit of any one of claims 1 to 3.

8. A vehicle characterized by comprising: The vehicle domain controller of claim 7.

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