Monitoring system, vehicle body domain controller and vehicle
The capacitance and mechanical strain of the vehicle body domain controller are detected through the capacitance detection module and the strain detection module. Combined with vibration detection, multi-dimensional monitoring of the vehicle body domain controller is achieved, solving the problem of unpredictable failure risks in existing technologies and improving safety and reliability.
Patent Information
- Application Number
- CN202511021073.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2025-10-17
AI Technical Summary
Electronic modules such as vehicle body domain controllers are easily damaged and their safety needs to be improved. The existing monitoring system cannot perform multi-dimensional detection and fault risk prediction simultaneously.
The capacitance detection module and strain detection module are used to detect the capacitance parameters and mechanical strain of the electronic module. Combined with the vibration detection module, data analysis is performed through the processing module to achieve real-time monitoring of capacitance and mechanical stress and fault risk prediction.
It realizes multi-dimensional monitoring of the vehicle body domain controller, can predict failure risks in advance, improve safety and reliability, and prevent damage to electronic modules.
Smart Images
Figure CN120800487A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of inductance, and in particular to a monitoring system, a vehicle body domain controller and a vehicle. BACKGROUND
[0002] There are a large number of electronic components on a vehicle, such as a vehicle body domain controller, a power domain controller, and the like. Taking the vehicle body domain controller as an example, the vehicle body domain controller is responsible for controlling most low-voltage electrical appliances of the vehicle, and the physical structure and PCB circuit design thereof are complex, and a capacitor is an important protection device therein.
[0003] That is, in the related art, electronic modules such as the vehicle body domain controller are prone to damage, and the safety needs to be improved. SUMMARY
[0004] Embodiments of the present application provide a monitoring system to prevent electronic modules such as the vehicle body domain controller from being damaged, so as to at least partially solve the above technical problems.
[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, a monitoring system is provided, applied to an electronic module, and the monitoring system comprises:
[0006] A capacitor detection module capable of being connected to the electronic module, the capacitor detection module being configured to detect a parameter of a capacitor of the electronic module to determine a health state of the capacitor.
[0007] A strain detection module connected to the electronic module, the strain detection module being configured to detect a mechanical strain of the electronic module.
[0008] Optionally, the strain detection module is configured to be connected to a circuit board of the electronic module, and the strain detection module is configured to detect a mechanical strain of the circuit board having the capacitor.
[0009] Optionally, the parameter of the capacitor comprises at least one of an equivalent series resistance, a capacitance value, and a leakage current.
[0010] Optionally, the capacitor detection module comprises a detection piece, the detection piece being connectable to the capacitor in a disconnected state to detect the parameter of the capacitor.
[0011] Optionally, the capacitor detection module comprises a detection circuit, the detection circuit being connected to the capacitor, and the detection circuit being capable of detecting the parameter of the capacitor in real time.
[0012] Optionally, the detection circuit is configured to be integrated into a control circuit of the electronic module.
[0013] Optionally, the strain detection module comprises a strain gauge connected to a circuit board of the electronic module, the strain gauge being configured to detect mechanical strain of the circuit board.
[0014] Optionally, the number of the strain gauges is at least two, different strain gauges being connected to different positions of the circuit board, so that different strain gauges can detect mechanical strain at different positions of the circuit board.
[0015] Optionally, the monitoring system further comprises a vibration detection module connected to the electronic module, the vibration detection module being configured to detect vibration data of the electronic module.
[0016] Optionally, the monitoring system further comprises a processing module, the capacitance detection module, the strain detection module and the vibration detection module being connected to the processing module, the processing module being configured to send a preset signal when a detection value of one of the capacitance detection module, the strain detection module and the vibration detection module exceeds a threshold value.
[0017] Optionally, the monitoring system further comprises a data acquisition module, the capacitance detection module, the strain detection module and the vibration detection module being connected to an input end of the data acquisition module, an output end of the data acquisition module being connected to the processing module.
[0018] Optionally, the data acquisition module is configured to collect detection data of the capacitance detection module, the strain detection module and the vibration detection module, and transmit the detection data to a data analysis module, so that the data analysis module can determine a predicted state of the capacitance of the electronic module based on the detection data of the capacitance detection module, the strain detection module and the vibration detection module.
[0019] According to a second aspect of the present application, a vehicle body domain controller is provided, comprising the monitoring system as described above.
[0020] Optionally, the vehicle body domain controller further comprises a circuit board, the capacitance detection module being integrated in the circuit board.
[0021] Optionally, the vehicle body domain controller further comprises a housing, the housing being formed with a mounting cavity, the circuit board being arranged in the mounting cavity.
[0022] Optionally, the monitoring system further comprises a vibration detection module connected to the housing, the vibration detection module being configured to detect vibration data of the housing.
[0023] Optionally, the vibration detection module is connected to an inner wall surface of the housing.
[0024] Optionally, the strain detection module is embedded in the circuit board.
[0025] According to a third aspect of the present application, a vehicle is provided, comprising a vehicle body domain controller as described above.
[0026] In the monitoring system of the embodiments of the present application, the capacitance detection module can detect the parameters of the capacitance of the electronic module, and determine the health state of the capacitance according to the parameters of the capacitance. If the capacitance fails, it will cause the electronic module to be damaged, etc. According to the health state of the capacitance, it can be determined whether the capacitance has a failure risk, and then maintenance processing can be performed when the capacitance has a failure risk, so as to avoid the capacitance failure causing the electronic module to be damaged.
[0027] The strain detection module can detect the mechanical strain of the electronic module, and then determine whether the stress received by the electronic module is too large, or whether the stress acting on the capacitance will cause the capacitance to fail. When the stress received by the electronic module or the capacitance is too large, it is easy to cause the electronic module or the capacitance to be damaged or fail. Therefore, when the stress is too large, the electronic module and the capacitance can be maintained and processed in advance to avoid the electronic module from being damaged.
[0028] That is, the present application can determine the health state of the capacitance through the capacitance detection module, determine the mechanical strain of the electronic module through the strain detection module, and monitor the mechanical impact and electrical impact received by the capacitance, so as to monitor the electronic module at the electrical level and the mechanical level, determine whether the electronic module has a failure risk from different levels, and then intervene in maintenance processing when the electronic module has a failure risk, so as to avoid the vehicle body domain controller and other electronic modules from failing, and improve the safety.
[0029] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating any creative labor.
[0031] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.
[0032] Figure 1 is a structural schematic diagram of the monitoring system provided in the exemplary embodiments of the present disclosure;
[0033] Figure 2 is a structural schematic diagram of a monitoring system for transmitting data to a data analysis module provided in the exemplary embodiment of the present disclosure;
[0034] Figure 3 is a circuit schematic diagram of a detection member provided in the exemplary embodiment of the present disclosure;
[0035] Figure 4 is a circuit schematic diagram of a detection circuit provided in the exemplary embodiment of the present disclosure;
[0036] Figure 5 is a structural schematic diagram of a body domain controller provided in the exemplary embodiment of the present disclosure.
[0037] BRIEF DESCRIPTION OF THE DRAWINGS
[0038] 1, capacitance detection module; 2, electronic module; 3, strain detection module; 4, vibration detection module; 5, processing module; 6, data acquisition module; 7, data analysis module; 11, detection member; 12, detection circuit; 20, body domain controller; 21, circuit board; 22, shell; 31, strain gauge; 221, mounting cavity. DETAILED DESCRIPTION
[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0040] According to the first aspect of the present application, referring to Figures 1 to 4 , the present application provides a monitoring system applied to an electronic module 2.
[0041] Referring to Figure 1 , the monitoring system comprises a capacitance detection module 1 and a strain detection module 3, the capacitance detection module 1 is capable of being connected to the electronic module 2, the capacitance detection module 1 is used for detecting parameters of the capacitance of the electronic module 2 to determine the health state of the capacitance, the strain detection module 3 is connected to the electronic module 2, and the strain detection module 3 is used for detecting mechanical strain of the electronic module 2.
[0042] It can be understood that the capacitance detection module 1 can detect the parameters of the capacitance of the electronic module 2, and determine the health state of the capacitance according to the parameters of the capacitance. If the capacitance fails, it will cause the electronic module 2 to be damaged, etc. According to the health state of the capacitance, it can be determined whether the capacitance has a failure risk, and then maintenance treatment can be performed when the capacitance has a failure risk to avoid the capacitance failure causing the electronic module 2 to be damaged.
[0043] The strain detection module 3 can detect the mechanical strain of the electronic module 2, and then determine whether the stress received by the electronic module 2 is too large according to the mechanical strain of the electronic module 2, and whether the stress acting on the capacitance will cause the capacitance to fail. When the stress received by the electronic module 2 or the capacitance is too large, it is easy to cause the electronic module 2 or the capacitance to be damaged or fail, and then maintenance treatment can be performed on the electronic module 2 and the capacitance when the stress is too large to avoid the electronic module 2 from being damaged.
[0044] That is, the application can determine the health state of the capacitance through the capacitance detection module 1, and determine the mechanical strain of the electronic module 2 through the strain detection module 3, and monitor the mechanical impact and electrical impact received by the capacitance, realize monitoring the electronic module 2 in the electrical and mechanical levels, determine whether the electronic module 2 has a failure risk from different levels, and then intervene in maintenance treatment in advance when the electronic module 2 has a failure risk to avoid the vehicle body domain controller 20 and other electronic modules 2 from failing, thereby improving safety.
[0045] The monitoring system in the related art does not simultaneously detect the stress environment of the vehicle body domain controller 20 and the electrical characteristics of the capacitance in multiple dimensions. The monitoring system in the related art can only detect failures, but cannot predict failure risks.
[0046] The application simultaneously detects the stress of the electronic module 2 such as the vehicle body domain controller 20 and the electrical parameters of the capacitance, and realizes detection at different levels. In the application, the failure risk of the electronic module 2 can be predicted according to the real-time parameters of the electronic module 2 and the capacitance, and then intervention can be made in advance to effectively prevent the electronic module 2 from being damaged.
[0047] It can be understood that when the capacitance has not failed, but at least part of the parameters of the capacitance are in an abnormal state, it means that the capacitance has a failure risk, i.e. the electronic module 2 has a failure risk, and then maintenance can be performed on the capacitance to avoid the electronic module 2 from being damaged.
[0048] When the electronic module 2 (including the capacitor) has not yet failed or broken down, but the stress on the electronic module 2 is too large, the stress is too large to cause the electronic module 2 to fail, and the capacitor also fails, and it can be determined that the electronic module 2 has a risk of failure at this time, and the electronic module 2 can be maintained in advance to avoid damage to the electronic module 2.
[0049] In some examples, the detection data of the capacitor detection module 1 and the strain detection module 3 can be processed and analyzed by the control component to determine whether the capacitor and the electronic module 2 have a risk of failure or failure, and the capacitor or the electronic module 2 can be maintained in advance before the failure occurs.
[0050] In some examples, the electronic module 2 is, for example, a body domain controller 20 or a power domain controller. It should be noted that the electronic module 2 is only exemplified here and is not specifically limited, and the electronic module 2 can also be any other suitable electronic component.
[0051] In some embodiments, referring to Figure 1 and Figure 5 , the strain detection module 3 is connected to the circuit board 21 of the electronic module 2, and the strain detection module 3 is used to detect the mechanical strain of the circuit board 21 with the capacitor.
[0052] It can be understood that since the capacitor is arranged on the circuit board 21, the mechanical strain of the circuit board 21 can best reflect the stress on the capacitor, and therefore the strain detection module 3 is connected to the circuit board 21, so that the strain detection module 3 can directly detect the mechanical strain of the circuit board 21, and the detection data of the strain detection module 3 can accurately reflect the stress on the capacitor.
[0053] In some embodiments, the parameters of the capacitor include at least one of an equivalent series resistance, a capacitance value, and a leakage current.
[0054] It can be understood that the equivalent series resistance (ESR) is a series resistance in parallel with the ideal capacitance of the capacitor, which increases with aging, vibration, stress, and temperature changes. The increase in the ESR value will cause an increase in power loss, affect heating, and cause a decrease in system efficiency, especially in high-frequency applications or power systems. Therefore, the equivalent series resistance of the capacitor is detected in this embodiment, and whether the capacitor has a risk of failure can be determined according to the actual equivalent series resistance, and a warning or a maintenance request can be triggered in time before the capacitor fails.
[0055] For example, when the equivalent series resistance value increases by 20% or more, an alarm is triggered.
[0056] The capacitance value (C) can reflect the ability of the capacitor to store charge, and a decrease in the capacitance value can affect the filtering or timing function. Aging can cause the capacitance value to decrease, and mechanical stress can also indirectly reduce the capacitance value through physical deformation. Therefore, the embodiment detects the capacitance value of the capacitor, which can determine whether the capacitor is at risk of failure based on the actual capacitance value, and can trigger an alarm or maintenance request in a timely manner before the capacitor fails.
[0057] For example, when the capacitance value decreases by 5% or more, a maintenance request is triggered.
[0058] The leakage current is the current through the capacitor when a DC voltage is applied, which should be extremely low. Mechanical stress that causes capacitor damage can cause a sharp increase in leakage current, increasing the risk of domain controller ablation. At the same time, an increase in leakage current can also indicate dielectric breakdown or aging. Therefore, the embodiment detects the leakage current of the capacitor, which can determine whether the capacitor is at risk of failure based on the actual leakage current, and can trigger an alarm or maintenance request in a timely manner before the capacitor fails.
[0059] In some embodiments, referring to Figure 3 The capacitor detection module 1 includes a detection member 11 that can be connected to the capacitor in a disconnected state to detect the parameters of the capacitor.
[0060] It can be understood that after disconnecting the capacitor, the detection member 11 is connected to the capacitor, so that the detection member 11 can detect the parameters of the capacitor to obtain the parameters of the capacitor.
[0061] For example, the detection member 11 is, for example, an ESR table or a capacitor measuring instrument or any other suitable detection component.
[0062] In some embodiments, referring to Figure 4 The capacitor detection module 1 includes a detection circuit 12 connected to the capacitor, which can detect the parameters of the capacitor in real time.
[0063] It can be understood that the detection circuit 12 can detect the parameters of the capacitor in real time without the need to disconnect the circuit.
[0064] It can be understood that the detection circuit 12 can be integrated into the electronic module 2, which can periodically detect the parameters of the capacitor without relying on external test equipment.
[0065] In some examples, Figure 4 An example of using the detection circuit 12 to detect capacitor parameters: the 555 circuit is a non-stable multivibrator that can output a square wave with a frequency of 1 kHz-200 kHz. The parameters monitored by the detection circuit 12 are also the equivalent series resistance (ESR), the capacitance value (C), and the leakage current. The monitoring process is as follows:
[0066] 1. Signal injection and measurement
[0067] AC impedance method: the system (example: 555 circuit, the body domain controller 20 is generally a control circuit) injects a small AC signal (1 kHz to 10 kHz), measures the amplitude and phase of the voltage, and the calculation formula of ESR and C is:
[0068]
[0069] Transient response analysis: when the load changes, analyze the recovery time of the output voltage, estimate ESR and C based on the time constant, and the calculation formula is:
[0070] τ = (T + ESR) x C;
[0071] It should be noted that the above measurement methods are generally run when the system is idle, low load, mechanical stress and vibration parameters change sharply, and real-time monitoring while reducing interference to the main function.
[0072] 2. Data analysis and threshold judgment
[0073] The measured results are compared with the preset threshold value, such as triggering an alarm when the ESR increases by 20% or the leakage current increases sharply, and triggering a maintenance request when the capacitance value decreases by 5%. At the same time, the system sends historical data to the cloud model at regular intervals, and predicts the aging trend based on the machine learning model.
[0074] In some examples, the capacitance detection module 1 can also use in-situ measurement to monitor ESR and capacitance in real time instead of periodic testing.
[0075] Specifically, the detection circuit 12 is used to integrate the control circuit of the electronic module 2 to realize the built-in of the capacitance detection module 1, and can improve the integration of the system.
[0076] In some embodiments, referring to Figure 1 and Figure 5 , the strain detection module 3 includes a strain gauge 31 connected to the circuit board 21 of the electronic module 2, and the strain gauge 31 is used to detect the mechanical strain of the circuit board 21.
[0077] It can be understood that the strain gauge 31 can detect the mechanical strain of the circuit board 21 to obtain the mechanical strain data of the circuit board 21, and it can be judged whether the mechanical strain exceeds the threshold value. At the same time, the stress at the circuit board 21 can be determined according to the mechanical strain of the circuit board 21, so as to judge whether the stress is too large and whether it will cause the capacitance on the circuit board 21 to fail, and then it can be determined whether the electronic module 2 needs to be maintained to prevent the capacitance and the electronic module 2 from being damaged.
[0078] In some examples, the strain gauges 31 are surface mount strain gauges, suitable for retrofitting.
[0079] In particular, the number of strain gauges 31 is at least two, and different strain gauges 31 are connected to different positions of the circuit board 21, so that different strain gauges 31 can detect mechanical strain at different positions of the circuit board 21.
[0080] It can be understood that different strain gauges 31 can detect mechanical strain at different positions of the circuit board 21, i.e. mechanical strain data corresponding to different positions of the circuit board 21 can be obtained, and whether the mechanical strain of the circuit board 21 is too large can be more accurately determined. At the same time, according to the mechanical strain at different positions, the stress at different positions of the circuit board 21 can be determined, and whether the stress on the capacitor of the circuit board 21 is too large can be more accurately determined.
[0081] In some examples, the plurality of strain gauges 31 are arranged in an array to cover different areas of the circuit board 21, and thus monitor the stress gradient.
[0082] In some examples, different materials can be used to optimize the durability of the strain gauges 31.
[0083] In some embodiments, referring to Figure 1 , the monitoring system further comprises a vibration detection module 4 connected to the electronic module 2, and the vibration detection module 4 is used to detect vibration data of the electronic module 2.
[0084] It can be understood that the vibration detection module 4 can detect the vibration of the electronic module 2 to determine whether the vibration amplitude or vibration frequency is too large.
[0085] If the vibration amplitude or vibration frequency is too large, it means that the electronic module 2 is at risk of damage, and thus the electronic module 2 can be maintained in advance.
[0086] The detection data of the vibration detection module 4 can reflect the vibration at the capacitor, and if the vibration value is too large, the capacitor is prone to failure, and thus the capacitor can be maintained in advance to avoid capacitor failure.
[0087] It can be understood that the present application can monitor mechanical stress, vibration, and capacitor electrical parameters in real time, and comprehensively prevent capacitor damage and vehicle fire. The system is suitable for a temperature range of -40°C to 150°C, and is suitable for vibration and impact during vehicle operation. The system includes embedded strain gauges 31, vibration sensors, capacitor condition monitoring modules, processing modules 5, and data analysis modules 7, providing comprehensive mechanical stress evaluation and predictive maintenance.
[0088] In some examples, the vibration detection module 4 is a triaxial accelerometer, for example, with a frequency range of 0.1 Hz to 1000 Hz.
[0089] In some examples, the vibration detection module 4 is a single-axis accelerometer, which is advantageous in reducing cost and is suitable for low-vibration links.
[0090] In some examples, the vibration detection module 4 is configured to adjust the frequency range to cover more scenarios.
[0091] In some embodiments, referring to Figure 1 , the monitoring system further comprises a processing module 5, and the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4 are connected to the processing module 5. The processing module 5 is configured to send a preset signal when the detection value of one of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4 exceeds a threshold value.
[0092] It can be understood that the processing module 5 can process and analyze the detection data of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4 to determine whether the detection value of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4 exceeds the threshold value. When the detection value of one or more modules exceeds the threshold value, it indicates that the capacitance is at risk of failure or the electronic module 2 is at risk of damage, and the processing module 5 will send a preset signal to process the risk in time and prevent the capacitance from failing and the electronic module 2 from being damaged.
[0093] It can be understood that the preset signal is used to represent that the detection value exceeds the threshold value, i.e., the capacitance is at risk of failure or the electronic module 2 is at risk of damage.
[0094] In some examples, the preset signal can be used to trigger an alarm or can be sent to a user to remind the user.
[0095] In some examples, the preset signal can be sent to a terminal device or a user.
[0096] In some embodiments, referring to Figure 1 , the monitoring system further comprises a data acquisition module 6, and the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4 are connected to the input end of the data acquisition module 6. The output end of the data acquisition module 6 is connected to the processing module 5.
[0097] It can be understood that the data acquisition module 6 can acquire the detection data of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4, and then transmit the acquired data to the processing module 5, so that the processing module 5 can determine whether the capacitance is at risk of failure and whether the electronic module 2 is at risk of damage according to the acquired data.
[0098] In some examples, the communication between the capacitance detection module 1, the vibration detection module 4 and the strain detection module 3 and the processing module 5 can be CAN communication.
[0099] In some embodiments, referring to Figure 2 , the data collection module 6 is configured to collect the detection data of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4, and transmit the detection data to the data analysis module 7, so that the data analysis module 7 can determine the predicted state of the capacitance of the electronic module 2 based on the detection data of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4.
[0100] It can be understood that after the data collection module 6 collects the detection data of the capacitance detection module 1, the strain detection module 3 and the vibration detection module 4, the data is packaged and sent to the data analysis module 7, so that the data analysis module 7 can predict the state of the capacitance according to the detection data, to determine the predicted state of the capacitance of the electronic module 2, realize the prediction of the state of the capacitance, and further find out the risk of failure of the capacitance before the failure of the capacitance, so as to maintain the capacitance in time and prevent the failure of the capacitance.
[0101] In some examples, the communication between the processing module 5 and the data analysis module 7 is completed through a large data packet, and finally the data analysis module 7 processes and outputs the result.
[0102] It should be noted that the system not only independently monitors each parameter, but also analyzes and processes the correlation between stress, vibration data and capacitance parameter data. By establishing a model (based on data-driven and physical model), it can be understood how long-term physical stress (continuous vibration, thermal expansion and contraction) accelerates the degradation of capacitance performance (such as capacity decline, ESR rise), and whether short-term physical stress (impact, stepping) damages the capacitance (such as short-circuit failure). Based on this correlation analysis, early prediction of the future state and potential failure risk of the capacitance is realized.
[0103] In the related art, the threshold judgment or simple diagnosis is usually isolated, and the internal relationship and evolution law between the physical environmental stress and the degradation of the electrical performance of the core element are not revealed. The system realizes the leap from "diagnosis" to "prediction" through cross-domain data fusion and correlation analysis.
[0104] In the related art, the prediction model for the battery and the motor focuses on its specific electrochemical or electromagnetic characteristics, and the associated physical quantities and failure mechanisms are different from the capacitance in the body domain controller 20. The present application establishes a prediction model for the specific link of "mechanical stress / vibration to capacitance degradation" in the body domain environment.
[0105] According to the second aspect of the present application, referring to Figure 5The application provides a vehicle body domain controller 20, comprising the above-mentioned monitoring system.
[0106] It can be understood that the capacitance detection module 1 can detect the parameters of the capacitance of the vehicle body domain controller 20, and determine the health state of the capacitance according to the parameters of the capacitance. If the capacitance fails, it will cause the vehicle body domain controller 20 to be damaged and the like, and according to the health state of the capacitance, it can be determined whether the capacitance has a failure risk, and then maintenance treatment can be performed when the capacitance has a failure risk, so as to avoid the capacitance failure causing the vehicle body domain controller 20 to be damaged.
[0107] The strain detection module 3 can detect the mechanical strain of the vehicle body domain controller 20, and then it can be determined whether the stress received by the vehicle body domain controller 20 is too large according to the mechanical strain of the vehicle body domain controller 20, and it can also be determined whether the stress acting on the capacitance will cause the capacitance to fail. When the stress received by the vehicle body domain controller 20 or the capacitance is too large, it is easy to cause the vehicle body domain controller 20 or the capacitance to be damaged or fail, and then maintenance treatment can be performed on the vehicle body domain controller 20 and the capacitance when the stress is too large, so as to avoid the vehicle body domain controller 20 from being damaged.
[0108] That is, the application can determine the health state of the capacitance through the capacitance detection module 1, and can determine the mechanical strain of the vehicle body domain controller 20 through the strain detection module 3, and can monitor the mechanical impact and electrical impact received by the capacitance, so as to monitor the vehicle body domain controller 20 at the electrical level and the mechanical level, determine whether the vehicle body domain controller 20 has a failure risk from different levels, and then intervene in maintenance treatment when the vehicle body domain controller 20 has a failure risk, so as to avoid the vehicle body domain controller 20 from failing, and improve the safety.
[0109] It can be understood that the application can accurately warn the risk of function abnormality or even ablation of the vehicle body domain controller 20 caused by the performance degradation or imminent failure of the capacitance. This enables maintenance measures (such as early warning, function limitation, and replacement prompt) to be taken before the capacitance completely fails, thereby significantly improving the overall safety, reliability of the vehicle body domain controller 20, and reducing the probability of serious failure (such as ablation).
[0110] That is, the application designs an integrated multi-layer monitoring system for the vehicle body domain controller 20. Compared with related technologies, it has significant differences and advantages in terms of “monitoring dimension (physical + electrical elements), data correlation analysis depth, prediction accuracy and pertinence (focusing on capacitance and related risks)”.
[0111] The related art lacks the ability to specifically use the capacitor as the core monitoring object for predictive maintenance and risk avoidance of the body domain controller 20, and to comprehensively evaluate it in combination with the physical stress it is subjected to. The traditional OBD is a post-fault reporting, other monitoring systems are not integrated, or the objects are different, or only the capacitor itself is looked at and the environmental stress influence is ignored. The present application provides a system-level, multi-dimensional, and focused on key risk points (capacitor + physical stress) predictive safety protection scheme.
[0112] In some embodiments, referring to Figure 5 The body domain controller 20 further comprises a circuit board 21, and the capacitor detection module 1 is integrated on the circuit board 21.
[0113] It can be understood that the capacitor detection module 1 is integrated on the circuit board 21 of the electronic module 2, which is conducive to improving the integration of the electronic module 2.
[0114] In some embodiments, referring to Figure 5 The body domain controller 20 further comprises a housing 22, and the housing 22 forms a mounting cavity 221, and the circuit board 21 is arranged in the mounting cavity 221.
[0115] It can be understood that the circuit board 21 and the capacitor detection module 1 are arranged in the internal space of the housing 22, and the housing 22 can protect the circuit board 21 and the capacitor detection module 1.
[0116] In some embodiments, referring to Figure 5 The monitoring system further comprises a vibration detection module 4 connected to the housing 22, and the vibration detection module 4 is used to detect vibration data of the housing 22.
[0117] It can be understood that since the circuit board 21 with the capacitor is arranged in the mounting cavity 221 of the housing 22, the vibration of the housing 22 can reflect the vibration condition of the entire body domain controller 20 and the capacitor, and therefore the vibration detection assembly is arranged at the housing 22, so that the vibration detection assembly can detect the vibration of the housing 22.
[0118] Specifically, referring to Figure 5 The vibration detection module 4 is connected to the inner wall surface of the housing 22, so that the entire monitoring system is arranged in the housing 22, improving the integration of the body domain controller 20.
[0119] In some examples, the installation of the vibration detection module 4 is to install a three-axis accelerometer on the body domain controller 20 housing 22, the position is selected to maximize the capture of three-axis vibration, the frequency range is 0.1 Hz to 1000 Hz, covering the frequency in road vibration and car operation. In terms of fixation, the use of fixtures such as screws or adhesives ensures that the accelerometer is firmly connected to the housing 22, avoiding the influence of measurement accuracy caused by loose installation. In terms of electrical connection, the accelerometer CAN bus communicates with the data acquisition unit, and the data acquisition unit also supports wired or wireless transmission (such as CAN bus or Bluetooth). At the same time, the vibration detection module 4 is based on the standard ISO 16750-3, suitable for automotive electronic environment.
[0120] In some embodiments, the strain detection module 3 is embedded in the circuit board 21, ensuring that the strain detection module 3 can withstand temperature changes in the automotive environment.
[0121] In some examples, the circuit board 21 is composed of multiple rigid layers (such as FR4), and a groove (depth 10-100 microns) is formed by milling for placing a polymer substrate (such as polyimide). The formation of the strain gauge 31 is to deposit a metal trace (such as nickel-chromium) on the polymer substrate, with a thickness of less than 1 micron, ensuring miniaturization. The strain gauge 31 is integrated into the bridge circuit as a variable resistor (RV), and the output resistance change is proportional to the strain. In terms of electrical connection, a through-hole is formed between the PCB layers by laser drilling to connect the strain gauge 31 to the metal pad on the surface of the PCB, realizing electrical access. At the same time, the embedded design ensures that the strain gauge 31 can withstand temperature changes in the automotive environment.
[0122] It should be noted that the stress detection module, the vibration detection module 4 and the capacitance detection module 1 are innovatively integrated into the body domain controller 20, wherein: the strain detection module 3 can be integrated into the bridge circuit as a variable resistor (RV), a through-hole is formed between the PCB layers by laser drilling to connect the strain detection module 3 to the metal pad on the surface of the PCB, realizing electrical access, the number and position of the strain detection module 3 are determined by the specific vehicle modeling and compressed sensing algorithm, such strategy can achieve optimal monitoring effect with the least strain gauge 31, effectively reducing the cost. The installation of the vibration detection module 4 is to install a three-axis accelerometer on the inside of the body domain controller 20 housing 22, the position is selected to maximize the capture of three-axis vibration, the number is one or more. The capacitance detection module 1 is directly integrated in the PCB circuit of the body domain controller 20. The three modules communicate with the processing module 5 of the body domain controller 20 through the CAN bus, and transmit the data to the data analysis module 7 (such as the cloud) through large data packets. The system realizes the synchronous and real-time monitoring of the key physical factors (stress, vibration) and the key element state (capacitance health) affecting the safety of the body domain controller 20.
[0123] The related technology mainly monitors basic electrical / functional states such as voltage and temperature, lacks direct monitoring of stress and vibration, and also lacks continuous and online monitoring of health parameters of key elements such as capacitors. The present application realizes multi-dimensional comprehensive perception of the physical environment and the element state.
[0124] According to a third aspect of the present application, the present application provides a vehicle comprising the vehicle body domain controller 20 described above.
[0125] It can be understood that the capacitance detection module 1 can detect the parameters of the capacitor of the vehicle body domain controller 20, and determine the health state of the capacitor according to the parameters of the capacitor. If the capacitor fails, it will cause the vehicle body domain controller 20 to be damaged, etc., and according to the health state of the capacitor, it can be determined whether the capacitor has a failure risk, and then maintenance treatment can be performed when the capacitor has a failure risk, to avoid the capacitor failure causing the vehicle body domain controller 20 to be damaged.
[0126] The strain detection module 3 can detect the mechanical strain of the vehicle body domain controller 20, and then determine whether the stress received by the vehicle body domain controller 20 is too large, and whether the stress acting on the capacitor will cause the capacitor to fail. When the stress received by the vehicle body domain controller 20 or the capacitor is too large, it is easy to cause the vehicle body domain controller 20 or the capacitor to be damaged or fail, and then when the stress is too large, the vehicle body domain controller 20 and the capacitor can be maintained to avoid the vehicle body domain controller 20 from being damaged.
[0127] That is, the present application can determine the health state of the capacitor through the capacitance detection module 1, and determine the mechanical strain of the vehicle body domain controller 20 through the strain detection module 3, while monitoring the mechanical impact and electrical impact received by the capacitor, realizing monitoring the vehicle body domain controller 20 at the electrical level and the mechanical level, determining whether the vehicle body domain controller 20 has a failure risk from different levels, and then when the vehicle body domain controller 20 has a failure risk, intervening in maintenance treatment in advance to avoid the vehicle body domain controller 20 from failing, improving the safety, and ensuring that the vehicle can work stably.
[0128] In some examples, the vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., which is not limited by the present application.
[0129] In the description of the application, the terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0130] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.
[0131] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.
[0132] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment in accordance with the technical essence of the present application without departing from the technical solution content of the present application still falls within the scope of the technical solution of the present application.
Claims
1. A monitoring system, applied to an electronic module, characterized in that: The monitoring system comprises: a capacitance detection module, capable of being connected to the electronic module, and configured to detect parameters of the capacitance of the electronic module to determine a health status of the capacitance; The strain detection module is connected to the electronic module, and is used to detect the mechanical strain of the electronic module.
2. The monitoring system according to claim 1, characterized in that The strain detection module is used to be connected to the circuit board of the electronic module, and the strain detection module is used to detect the mechanical strain of the circuit board having the capacitor.
3. The monitoring system according to claim 1, wherein: The parameters of the capacitor include at least one of an equivalent series resistance, a capacitance value, and a leakage current.
4. The monitoring system according to claim 1, wherein: The capacitance detection module includes a detection component, which can be connected to the capacitor in a disconnected state to detect parameters of the capacitor.
5. The monitoring system according to claim 1, characterized in that The capacitance detection module includes a detection circuit, which is connected to the capacitor and can detect parameters of the capacitor in real time.
6. The monitoring system according to claim 5, characterized in that The detection circuit is used to be integrated into the control circuit of the electronic module.
7. The monitoring system according to claim 1, characterized in that The strain detection module includes a strain gauge connected to a circuit board of the electronic module, and the strain gauge is used to detect the mechanical strain of the circuit board.
8. The monitoring system according to claim 7, characterized in that: The number of the strain gauges is at least two, and different strain gauges are connected to different positions of the circuit board, so that the different strain gauges can detect mechanical strains at different positions of the circuit board.
9. The monitoring system according to any one of claims 1 to 8, characterized in that: The monitoring system further includes a vibration detection module, which is connected to the electronic module and is used to detect vibration data of the electronic module.
10. The monitoring system according to claim 9, characterized in that: The monitoring system also includes a processing module, and the capacitance detection module, the strain detection module and the vibration detection module are all connected to the processing module. The processing module is configured to: when the detection value of one of the capacitance detection module, the strain detection module and the vibration detection module exceeds a threshold, send a preset signal.
11. The monitoring system according to claim 10, characterized in that: The monitoring system further includes a data acquisition module. The capacitance detection module, the strain detection module, and the vibration detection module are all connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the processing module.
12. The monitoring system according to claim 11, characterized in that The data acquisition module is used to collect detection data from the capacitance detection module, the strain detection module and the vibration detection module, and transmit the detection data to the data analysis module, so that the data analysis module can determine the predicted state of the capacitance of the electronic module based on the detection data from the capacitance detection module, the strain detection module and the vibration detection module.
13. A vehicle body domain controller, characterized in that: Comprising a monitoring system according to any one of claims 1 to 12.
14. The vehicle body domain controller according to claim 13, characterized in that: The vehicle body domain controller further includes a circuit board, and the capacitance detection module is integrated into the circuit board.
15. The vehicle body domain controller according to claim 14, characterized in that: The vehicle body domain controller further includes a housing, wherein the housing is formed with an installation cavity, and the circuit board is arranged in the installation cavity.
16. The vehicle body domain controller according to claim 15, characterized in that: The monitoring system further includes a vibration detection module, which is connected to the housing and is used to detect vibration data of the housing.
17. The vehicle body domain controller according to claim 16, characterized in that: The vibration detection module is connected to the inner wall surface of the shell.
18. The vehicle body domain controller according to any one of claims 13 to 17, characterized in that: The strain detection module is embedded in the circuit board.
19. A vehicle, characterized in that: Comprising the vehicle body domain controller as described in any one of claims 13 to 18.