A multi-level temperature threshold-based adaptive power consumption management method, system and platform for vehicle-mounted millimeter wave radar

Abstract

The application discloses a kind of based on multistage temperature threshold vehicle-mounted millimeter wave radar adaptive power consumption management method, system and platform;Through real-time monitoring radar chip temperature and setting multistage temperature threshold, according to the temperature belonging threshold interval automatically, differentiating power reduction measures from "no influence on performance" to "actively limiting key performance" are executed in stages, so that under the premise of ensuring that chip is not overheated, the optimal balance of radar system performance maximization under common working condition and functional safety under extreme working condition is realized, while the harsh requirements of hardware heat dissipation design and overall cost are reduced.

Description

Technical Field

[0001] This invention belongs to the field of automotive electronics technology, specifically relating to an adaptive power consumption management method, system, and platform for automotive millimeter-wave radar based on multi-level temperature thresholds. Background Technology

[0002] As one of the core sensors in Advanced Driver Assistance Systems (ADAS) and autonomous driving systems, the performance stability and reliability of automotive millimeter-wave radar are of paramount importance. During operation, the radar system generates a significant amount of heat from its main chip, power supply chip, and other critical components. To ensure stable operation of the radar in extreme ambient temperatures (such as the automotive-grade requirements of -40°C to 85°C), traditional designs primarily rely on passive or active hardware cooling measures, such as increasing the heatsink area, using materials with better thermal conductivity, and adding fans.

[0003] However, this hardware-based heat dissipation approach has significant drawbacks: First, to ensure that the chip junction temperature does not exceed safety limits at the highest ambient temperature (e.g., 85°C), the heat dissipation design must be based on the most severe operating conditions from the outset. This leads to complex heat dissipation structures, high material costs, and large space requirements. Second, to avoid performance degradation or failure due to overheating under the most severe conditions, the design often requires selecting lower-power devices or compromising on initial performance, thus limiting the radar's optimal performance under most common operating conditions (e.g., room temperature). In other words, traditional solutions incur continuous hardware costs and performance penalties to cope with the rare occurrence of extreme high-temperature scenarios.

[0004] Existing technologies also include some solutions for temperature monitoring and power consumption adjustment of electronic devices. However, these solutions are usually quite crude, such as setting only one over-temperature protection point and directly taking drastic measures such as frequency reduction or shutdown after reaching the threshold. Although this approach can prevent hardware damage, it can lead to a sudden and significant drop in radar performance or functional interruption, which may pose safety hazards in automotive applications and fails to achieve a smooth and optimal balance between performance and thermal management.

[0005] Therefore, in order to address the above-mentioned technical problems and shortcomings, there is an urgent need to design and develop an adaptive power management method, system, and platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds. Summary of the Invention

[0006] To overcome the shortcomings and difficulties of the existing technology, the purpose of this invention is to provide an adaptive power management method, system and platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds. This method can dynamically and precisely adjust the power consumption and performance status of the radar according to its actual operating temperature, thereby maximizing the performance of the radar under common operating conditions and reducing the heat dissipation of the hardware while ensuring the safety and reliability of the system.

[0007] The first objective of this invention is to provide an adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds; the second objective of this invention is to provide an adaptive power management system for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds; and the third objective of this invention is to provide an adaptive power management platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds.

[0008] The first objective of this invention is achieved as follows: the method comprises the following steps: Monitor the temperature of at least one critical chip in a millimeter-wave radar system; Multiple temperature thresholds associated with the temperature of the key chip are preset; wherein the multiple temperature thresholds include at least a first threshold, a second threshold higher than the first threshold, and a third threshold higher than the second threshold; when the detected temperature exceeds the first threshold but does not exceed the second threshold, a first type of power reduction operation is executed, which is configured to have no impact on the performance indicators of the millimeter-wave radar; when the detected temperature exceeds the second threshold but does not exceed the third threshold, a second type of power reduction operation is superimposed on the first type of power reduction operation, which is configured to have an impact on the non-critical performance indicators of the millimeter-wave radar, but... The key performance indicators are not affected; when the monitored temperature exceeds the third threshold, a third type of power reduction operation is performed on top of the first and second types of power reduction operations, and the third type of power reduction operation is configured to affect at least one key performance indicator of the millimeter-wave radar; the second threshold is higher than the temperature at which the chip works normally in an ambient temperature and air circulation environment of 25°C; the second threshold is the sum of q times the first threshold and (1-q) times the third threshold, where q is greater than or equal to 0.25 and less than or equal to 0.75; the first type of power reduction operation includes at least one of the following operations: enabling the chip's low-power mode, and turning off the power amplifier during the invalid period of the radar transmission waveform; The second type of power reduction operation includes: lengthening the frame period of the radar transmission waveform.

[0009] Furthermore, the preset multiple temperature thresholds associated with the temperature of the key chip further include: setting a fourth threshold lower than the first threshold and a fifth threshold higher than the third threshold; wherein, when the monitored temperature does not exceed the fourth threshold, no power reduction operation is performed; when the monitored temperature exceeds the fifth threshold, a fourth type of power reduction operation is performed, which is used to put the millimeter-wave radar into a low-power standby state; the fifth threshold is lower than the junction temperature when the chip is damaged. The difference between the fifth threshold and the junction temperature when the chip is damaged is the sum of the maximum error of chip temperature detection and the buffer margin. The difference between the third threshold and the fifth threshold is the sum of the maximum temperature overshoot and the safety margin obtained based on thermal resistance and thermal capacity.

[0010] Furthermore, the first type of power reduction operation also includes turning off the power supply of the corresponding processing module during idle periods of signal processing or data processing.

[0011] Furthermore, the second type of power reduction operation also includes the following operation: reducing the operating frequency of the radar signal processor.

[0012] Furthermore, the third type of power reduction operation includes at least one of the following operations: shortening the single transmission duration of the radar transmission waveform and reducing the radar transmission power; the first threshold is the temperature at which the chip works normally in an ambient temperature and air circulation environment of 25°C, the second threshold is the average of the first threshold and the third threshold, the buffer margin is 1.5 degrees Celsius, and the safety margin is 1 degree Celsius.

[0013] Furthermore, the method also includes a hysteresis control step: When determining whether the temperature exceeds or falls below a certain temperature threshold to trigger or cancel the corresponding power reduction operation, at least one of temperature hysteresis or time hysteresis is used to avoid the control strategy from frequently switching around the temperature threshold.

[0014] Further, the temperature hysteresis refers to: the temperature threshold used to trigger the cancellation of the power reduction operation being lower than the corresponding temperature threshold used to trigger the execution of the power reduction operation; and / or, The time hysteresis refers to the fact that after the temperature exceeds a certain temperature threshold and triggers the corresponding power reduction operation, the operation must be maintained for at least a predetermined duration before it can be determined whether to cancel the operation based on the temperature drop.

[0015] The second objective of this invention is achieved as follows: the system is applied to the aforementioned adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds; the system includes: The system includes a temperature monitoring module, a strategy control module, and a power consumption execution module; The temperature monitoring module is configured to monitor the temperature of at least one key chip in the millimeter-wave radar system. The strategy control module is configured to store multiple temperature thresholds and power reduction operation strategies corresponding to each temperature threshold range. The multiple temperature thresholds include at least a first threshold, a second threshold, and a third threshold. The power consumption execution module is configured to perform corresponding power reduction operations in response to the instructions of the strategy control module; The strategy control module is further configured to: when the temperature detected by the temperature monitoring module exceeds the first threshold but does not exceed the second threshold, control the power consumption execution module to perform a first type of power reduction operation; when the detected temperature exceeds the second threshold but does not exceed the third threshold, control the power consumption execution module to perform a second type of power reduction operation in addition to the first type of power reduction operation; when the detected temperature exceeds the third threshold, control the power consumption execution module to perform a third type of power reduction operation in addition to the first and second types of power reduction operations. The impact of the first, second, and third types of power reduction operations on the performance of millimeter-wave radar increases sequentially.

[0016] Furthermore, the strategy control module is also configured to implement hysteresis control logic, which includes temperature hysteresis logic and / or time hysteresis logic, to prevent frequent switching of the power reduction operation strategy near the temperature threshold. The key chip includes at least one of a radar main chip and a power management chip.

[0017] The third objective of this invention is achieved as follows: it includes a processor, a memory, and a control program for an adaptive power management platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds; wherein the control program is executed on the processor, the control program is stored in the memory, and the control program implements the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds.

[0018] This invention monitors the temperature of at least one key chip in a millimeter-wave radar system using a method. Multiple temperature thresholds associated with the temperature of the key chip are preset. These thresholds include at least a first threshold, a second threshold higher than the first threshold, and a third threshold higher than the second threshold. When the monitored temperature exceeds the first threshold but does not exceed the second threshold, a first type of power reduction operation is performed, configured to have no impact on the key performance indicators of the millimeter-wave radar. When the monitored temperature exceeds the second threshold but does not exceed the third threshold, a second type of power reduction operation is superimposed on top of the first type of power reduction operation. The second type of power reduction operation is configured to affect non-critical performance indicators of the millimeter-wave radar, but not critical performance indicators. When the monitored temperature exceeds the third threshold, a third type of power reduction operation is executed in addition to the first and second types of power reduction operations. This third type of power reduction operation is configured to affect at least one critical performance indicator of the millimeter-wave radar. A corresponding system and platform, through software algorithms, implements proactive and hierarchical management of radar power consumption, dynamically balancing performance and power consumption based on real-time temperature. This allows the radar to operate at maximum performance under common ambient and low-temperature conditions, fully utilizing its detection capabilities. When the temperature rises, priority is given to power reduction measures with no or minimal impact on performance, gently suppressing the temperature rise. Under more severe high-temperature conditions, measures affecting performance are implemented in a hierarchical and orderly manner, preserving core functions as much as possible while ensuring the system does not overheat. Ultimately, this reduces the design requirements for hardware heat dissipation solutions, saving material costs and space.

[0019] In other words, by monitoring the radar chip temperature in real time and setting multiple temperature thresholds, differentiated power reduction measures are automatically and hierarchically implemented according to the temperature threshold range, ranging from "no impact on performance" to "actively limiting key performance". This achieves the optimal balance between maximizing the performance of the radar system under common operating conditions and ensuring functional safety under extreme operating conditions while ensuring that the chip does not overheat. At the same time, it significantly reduces the stringent requirements for hardware heat dissipation design and overall cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of one embodiment of the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to the present invention. Figure 2 This is a schematic diagram of the second embodiment of the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to the present invention. Figure 3 This is a schematic diagram of the third embodiment of the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to the present invention. Figure 4 This is a schematic diagram of the fourth embodiment of the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to the present invention. Figure 5 This is a schematic diagram of the adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to the present invention. Figure 6 This is a schematic diagram of an adaptive power management system architecture for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, according to the present invention. Figure 7 This is a schematic diagram of an adaptive power management platform architecture for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, according to the present invention. Detailed Implementation

[0022] To facilitate a clearer understanding of the objectives, technical solutions, and advantages of this invention, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art can easily understand other advantages and effects of this invention from the content disclosed in this specification.

[0023] This invention can also be implemented or applied through other different specific examples, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Secondly, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] Preferably, the adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds of the present invention is applied in one or more terminals or servers. The terminal is a device capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0027] The terminal can be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal can interact with the customer via a keyboard, mouse, remote control, touchpad, or voice control device.

[0028] This invention provides a method, system, and platform for adaptive power management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds.

[0029] like Figure 5 The diagram shown is a flowchart of an adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds provided in an embodiment of the present invention.

[0030] In this embodiment, the adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds can be applied to terminals or fixed terminals with display functions. The terminals are not limited to personal computers, smartphones, tablets, desktop computers or all-in-one computers with cameras, etc.

[0031] The adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds can also be applied to a hardware environment consisting of a terminal and a server connected to the terminal via a network. The network includes, but is not limited to, wide area networks (WANs), metropolitan area networks (MANs), or local area networks (LANs). The adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds in this embodiment can be executed by the server, by the terminal, or by both the server and the terminal.

[0032] For example, for a terminal requiring adaptive power management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, the adaptive power management function based on multi-level temperature thresholds provided by the method of this invention can be directly integrated into the terminal, or a client for implementing the method of this invention can be installed. Alternatively, the method provided by this invention can also run on servers or other devices in the form of a Software Development Kit (SDK), providing an interface for the adaptive power management function of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds. Terminals or other devices can then implement the adaptive power management function of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds through the provided interface. The invention will be further described below with reference to the accompanying drawings.

[0033] like Figures 1-5 As shown, this invention provides an adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds. The method includes the following steps: S1. Monitor the temperature of at least one critical chip in the millimeter-wave radar system; S2. A plurality of temperature thresholds associated with the temperature of the key chip are preset; wherein the plurality of temperature thresholds include at least a first threshold, a second threshold higher than the first threshold, and a third threshold higher than the second threshold; when the detected temperature exceeds the first threshold but does not exceed the second threshold, a first type of power reduction operation is performed, the first type of power reduction operation being configured to have no impact on the key performance indicators of the millimeter-wave radar; when the detected temperature exceeds the second threshold but does not exceed the third threshold, a second type of power reduction operation is superimposed on the first type of power reduction operation, the second type of power reduction operation being configured to affect the non-key performance indicators of the millimeter-wave radar but have no impact on the key performance indicators; when the detected temperature exceeds the third threshold, a third type of power reduction operation is superimposed on the first and second type of power reduction operations, the third type of power reduction operation being configured to affect at least one key performance indicator of the millimeter-wave radar.

[0034] The preset temperature thresholds associated with the temperature of the key chip also include: S21. Set a fourth threshold that is lower than the first threshold and a fifth threshold that is higher than the third threshold; wherein, when the detected temperature does not exceed the fourth threshold, no power reduction operation is performed; when the detected temperature exceeds the fifth threshold, a fourth type of power reduction operation is performed, the fourth type of power reduction operation is used to put the millimeter-wave radar into a low-power standby state.

[0035] The first type of power reduction operation includes at least one of the following operations: enabling the chip's low-power mode, turning off the power amplifier during periods when the radar transmission waveform is invalid, and turning off the power supply of the corresponding processing module during idle periods of signal processing or data processing.

[0036] The second type of power reduction operation includes at least one of the following operations: lengthening the frame period of the radar transmission waveform and reducing the operating frequency of the radar signal processor.

[0037] The third type of power reduction operation includes at least one of the following operations: shortening the single transmission duration of the radar transmission waveform and reducing the radar transmission power.

[0038] The method also includes a hysteresis control step: S3. When determining whether the temperature exceeds or falls below a certain temperature threshold to trigger or cancel the corresponding power reduction operation, at least one of temperature hysteresis or time hysteresis is adopted to avoid the control strategy from frequently switching around the temperature threshold.

[0039] The temperature hysteresis refers to the following: the temperature threshold used to trigger the cancellation of the power reduction operation is lower than the corresponding temperature threshold used to trigger the execution of the power reduction operation; and / or, The time hysteresis refers to the fact that after the temperature exceeds a certain temperature threshold and triggers the corresponding power reduction operation, the operation must be maintained for at least a predetermined duration before it can be determined whether to cancel the operation based on the temperature drop.

[0040] Specifically, in this embodiment of the invention, the method of the present invention is as follows: 1. Monitor the temperature of the most critical radar main chip and power supply chip. Set five temperature thresholds for the critical radar main chip and power supply chip: red, yellow, green, white, and black temperature lines.

[0041] 2. The temperature redline is lower than the maximum temperature the chip can withstand. The lower threshold is the sum of the temperature detection accuracy and the safety margin.

[0042] 3. The yellow temperature line is lower than the red temperature line. The yellow temperature line should be set based on two temperatures: 1) The chip temperature at room temperature (25 degrees Celsius), referred to as the green temperature line. 2) The red temperature line. It can be set to the average of the two or slightly higher than the average, for example, the red temperature line. 0.7+ temperature green line 0.3.

[0043] 4. The white temperature line is lower than the green temperature line, for example, by 20 degrees. The black temperature line is the temperature dead line, which is higher than the red temperature line. The higher value represents the safety margin mentioned in point 2.

[0044] 5. Power reduction methods include: 1) Lengthening the frame period of the transmission. 2) Enabling the chip's built-in low-power mode. 3) Within a transmission frame, there are N chirs. Each chirp contains a period of effective radar transmission (during which the ADC collects data, and this collected data enters the processing flow). Therefore, the radar power amplifier is turned off during non-effective transmission periods. 4) Reducing the processor frequency for radar signal processing. 5) Shortening the transmission duration. 6) Reducing the transmission power. 7) Stopping transmission, stopping signal processing and data processing, and turning off the power to the corresponding modules. 8) During idle periods of signal processing, turning off the power to the signal processing module; during idle periods of radar data processing, turning off the power to the data processing module.

[0045] 6. Methods for reducing radar power consumption can be categorized into four types based on their impact on radar performance: Category 1: Almost no impact, including items 2), 3), and 8) in point 5. Category 2: No impact on critical performance, but impact on non-critical performance, including items 1) and 4) in point 5. Category 3: Impact on critical performance, specifically items 5) and 6) in point 5. Category 4: To stop busy operation and enter a rest mode, but the chip can still respond to communications normally, specifically item 7) in point 5.

[0046] 7. The power consumption tiered management method is as follows: When the chip temperature is below the white temperature line, no power reduction measures are taken. When the chip temperature exceeds the green temperature line, the first type of power reduction measure in section 6 is activated. When the chip temperature exceeds the yellow temperature line, the second type of power reduction measure in section 6 is activated, and the first type of power reduction measure is retained. When the chip temperature exceeds the red temperature line, the third type of power reduction measure in section 6 is activated, and the first and second types of power reduction measures are retained. When the chip temperature exceeds the black temperature line, the fourth type of power reduction measure in section 6 is activated. Conversely, when the temperature decreases, the corresponding power reduction measure is canceled.

[0047] 8. Implement hysteresis measures. The purpose of hysteresis measures is to prevent the temperature from oscillating frequently around various temperature thresholds. Hysteresis measures include temperature hysteresis and time hysteresis, specifically at least one of the two. Temperature hysteresis means that the corresponding temperature threshold during the temperature decrease process is slightly lower than the temperature rise threshold, for example, by 1 degree. Time hysteresis refers to the minimum time required before considering canceling the power reduction strategy after the temperature drops below the temperature threshold during the temperature rise process. For example, after crossing the temperature red line, if the corresponding power reduction measure is implemented, the measure takes effect immediately, and the temperature quickly drops below the temperature red line. However, if the hysteresis time has not yet been reached, the corresponding power reduction measure will not be canceled.

[0048] The principle behind the power reduction method in this invention is as follows: 1) Lengthening the transmission frame period: Lengthening the transmission period means transmitting the same wave, but with a longer interval. Therefore, the number of waves transmitted in the same amount of time decreases, which can significantly reduce power consumption. This measure affects the data refresh rate, but does not affect the radar's basic performance because the transmitted waves do not change, so the basic performance is not affected.

[0049] 2) Enable the chip's built-in low-power mode. The principle behind the chip's built-in low-power mode is not detailed here.

[0050] 3) Within a single frame of radar transmission, there are N chirs. Each chirp contains a period of effective radar transmission (during which the ADC collects data, and this collected data enters the processing flow). Therefore, the radar power amplifier is turned off during the ineffective transmission period. The principle behind this power reduction is to shorten the power amplifier's on-time. Because the power amplifier is turned off during the ineffective transmission period, it does not affect the radar's basic performance.

[0051] 4) Reduce the processor frequency for radar signal processing. Lower frequency means lower power consumption.

[0052] 5) Shorten the transmission duration. This changes the transmission duration, which is equivalent to shortening the operating time, thus reducing power consumption. However, because the transmission duration is changed, it will affect the basic performance of the radar.

[0053] 6) Reduce transmission power. Reducing the radar's transmission power will reduce power consumption, but it will also affect the radar's basic performance, such as detection range.

[0054] 7) Stop transmitting signals, stop signal and data processing, and turn off the power to the corresponding modules. With the power to the corresponding modules turned off, power consumption will definitely drop rapidly. 8) During idle periods of signal processing, turn off the power to the signal processing unit; during idle periods of radar data processing, turn off the power to the data processing unit. Idle periods also consume power, and turning off the power further saves power. Of course, this measure is actually used more often in conjunction with measures 1) and 5), because in order to reduce costs and improve performance, there won't be many idle periods under normal circumstances.

[0055] To achieve the above objectives, the present invention also provides an adaptive power consumption management system for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, such as... Figure 6 As shown, the system is applied to the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds; the system includes a temperature monitoring module, a strategy control module, and a power execution module. The temperature monitoring module is configured to monitor the temperature of at least one key chip in the millimeter-wave radar system. The strategy control module is configured to store multiple temperature thresholds and power reduction operation strategies corresponding to each temperature threshold range. The multiple temperature thresholds include at least a first threshold, a second threshold, and a third threshold. The power consumption execution module is configured to perform corresponding power reduction operations in response to the instructions of the strategy control module; The strategy control module is further configured to: when the temperature detected by the temperature monitoring module exceeds the first threshold but does not exceed the second threshold, control the power consumption execution module to perform a first type of power reduction operation; when the detected temperature exceeds the second threshold but does not exceed the third threshold, control the power consumption execution module to perform a second type of power reduction operation in addition to the first type of power reduction operation; when the detected temperature exceeds the third threshold, control the power consumption execution module to perform a third type of power reduction operation in addition to the first and second types of power reduction operations. The impact of the first, second, and third types of power reduction operations on the performance of millimeter-wave radar increases sequentially.

[0056] The strategy control module is also configured to implement hysteresis control logic, which includes temperature hysteresis logic and / or time hysteresis logic, to prevent frequent switching of the power reduction operation strategy near the temperature threshold. The key chip includes at least one of a radar main chip and a power management chip.

[0057] In the system solution embodiment of the present invention, the specific details of the method steps involved in the adaptive power consumption management of vehicle millimeter-wave radar based on multi-level temperature thresholds have been described above. That is to say, the functional modules in the system are used to implement the steps or sub-steps in the above method embodiment, and will not be repeated here.

[0058] To achieve the above objectives, the present invention also provides an adaptive power management platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, such as... Figure 7 As shown, the system includes a processor, a memory, and a control program for an adaptive power management platform for automotive millimeter-wave radar based on multi-level temperature thresholds. The processor executes the control program, which is stored in the memory. This control program implements the steps of the adaptive power management method for automotive millimeter-wave radar based on multi-level temperature thresholds. The specific details of these steps have been described above and will not be repeated here.

[0059] In this embodiment of the invention, the built-in processor of the vehicle-mounted millimeter-wave radar adaptive power management platform based on multi-level temperature thresholds can be composed of integrated circuits. For example, it can be composed of a single packaged integrated circuit, or multiple integrated circuits packaged with the same or different functions. This includes combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor connects to various components using various interfaces and lines, and executes programs or units stored in memory, as well as calling data stored in memory, to perform various functions of vehicle-mounted millimeter-wave radar adaptive power management based on multi-level temperature thresholds and process data. The memory is used to store program code and various data. It is installed in the vehicle-mounted millimeter-wave radar adaptive power management platform based on multi-level temperature thresholds and enables high-speed and automatic access to programs or data during operation.

[0060] The memory includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0061] This invention monitors the temperature of at least one key chip in a millimeter-wave radar system using a method. Multiple temperature thresholds associated with the temperature of the key chip are preset. These thresholds include at least a first threshold, a second threshold higher than the first threshold, and a third threshold higher than the second threshold. When the monitored temperature exceeds the first threshold but does not exceed the second threshold, a first type of power reduction operation is performed, configured to have no impact on the key performance indicators of the millimeter-wave radar. When the monitored temperature exceeds the second threshold but does not exceed the third threshold, a second type of power reduction operation is superimposed on top of the first type of power reduction operation. The second type of power reduction operation is configured to affect non-critical performance indicators of the millimeter-wave radar, but not critical performance indicators. When the monitored temperature exceeds the third threshold, a third type of power reduction operation is executed in addition to the first and second types of power reduction operations. This third type of power reduction operation is configured to affect at least one critical performance indicator of the millimeter-wave radar. A corresponding system and platform, through software algorithms, implements proactive and hierarchical management of radar power consumption, dynamically balancing performance and power consumption based on real-time temperature. This allows the radar to operate at maximum performance under common ambient and low-temperature conditions, fully utilizing its detection capabilities. When the temperature rises, priority is given to power reduction measures with no or minimal impact on performance, gently suppressing the temperature rise. Under more severe high-temperature conditions, measures affecting performance are implemented in a hierarchical and orderly manner, preserving core functions as much as possible while ensuring the system does not overheat. Ultimately, this reduces the design requirements for hardware heat dissipation solutions, saving material costs and space.

[0062] In other words, by monitoring the radar chip temperature in real time and setting multiple temperature thresholds, differentiated power reduction measures are automatically and hierarchically implemented according to the temperature threshold range, ranging from "no impact on performance" to "actively limiting key performance". This achieves the optimal balance between maximizing the performance of the radar system under common operating conditions and ensuring functional safety under extreme operating conditions while ensuring that the chip does not overheat. At the same time, it reduces the stringent requirements for hardware heat dissipation design and overall cost.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for adaptive power management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, characterized in that, The method includes: Monitor the temperature of at least one critical chip in a millimeter-wave radar system; Multiple temperature thresholds associated with the temperature of the key chip are preset; wherein, the multiple temperature thresholds include at least a first threshold, a second threshold higher than the first threshold, and a third threshold higher than the second threshold; when the detected temperature exceeds the first threshold but does not exceed the second threshold, a first type of power reduction operation is executed, which is configured to have no impact on the performance indicators of the millimeter-wave radar; when the detected temperature exceeds the second threshold but does not exceed the third threshold, a second type of power reduction operation is executed in addition to the first type of power reduction operation, which is configured to affect the non-critical performance indicators of the millimeter-wave radar but have no impact on the critical performance indicators; when the detected temperature exceeds the third threshold, a third type of power reduction operation is executed in addition to the first and second types of power reduction operations, which is configured to affect at least one critical performance indicator of the millimeter-wave radar; the second threshold is higher than the temperature at which the chip works normally in an ambient temperature and air circulation environment of 25°C; the second threshold is the sum of q times the first threshold and (1-q) times the third threshold, where q is greater than or equal to 0.25 and less than or equal to 0.75; The first type of power reduction operation includes at least one of the following operations: enabling the chip's low-power mode, and turning off the power amplifier during periods when the radar transmission waveform is invalid; The second type of power reduction operation includes: lengthening the frame period of the radar transmission waveform.

2. The adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds as described in claim 1, characterized in that, The preset multiple temperature thresholds associated with the temperature of the key chip further include: setting a fourth threshold lower than the first threshold and a fifth threshold higher than the third threshold; wherein, when the detected temperature does not exceed the fourth threshold, no power reduction operation is performed; when the detected temperature exceeds the fifth threshold, a fourth type of power reduction operation is performed, which is used to put the millimeter-wave radar into a low-power standby state; the fifth threshold is lower than the junction temperature when the chip is damaged; the difference between the fifth threshold and the junction temperature when the chip is damaged is the sum of the maximum error of chip temperature detection and the buffer margin; the difference between the third threshold and the fifth threshold is the sum of the maximum temperature overshoot and the safety margin obtained based on thermal resistance and thermal capacity.

3. A method for adaptive power consumption management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, as described in claim 1 or 2, is characterized in that... The first type of power reduction operation also includes: turning off the power supply of the corresponding processing module during idle periods of signal processing or data processing.

4. The adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds as described in claim 1, characterized in that, The second type of power reduction operation also includes reducing the operating frequency of the radar signal processor.

5. A method for adaptive power consumption management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, as described in claim 1 or 4, characterized in that... The third type of power reduction operation includes at least one of the following operations: shortening the single transmission duration of the radar transmission waveform and reducing the radar transmission power; The first threshold is the temperature at which the chip operates normally in an ambient temperature and air circulation environment of 25°C. The second threshold is the average of the first threshold and the third threshold. The buffer margin is 1.5 degrees Celsius, and the safety margin is 1 degree Celsius.

6. A method for adaptive power consumption management of vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, as described in claim 1 or 2, is characterized in that... The method also includes a hysteresis control step: When determining whether the temperature exceeds or falls below a certain temperature threshold to trigger or cancel the corresponding power reduction operation, at least one of temperature hysteresis or time hysteresis is used to avoid the control strategy from frequently switching around the temperature threshold.

7. The adaptive power consumption management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to claim 6, characterized in that, The temperature hysteresis refers to the following: the temperature threshold used to trigger the cancellation of the power reduction operation is lower than the corresponding temperature threshold used to trigger the execution of the power reduction operation; and / or, The time hysteresis refers to the fact that after the temperature exceeds a certain temperature threshold and triggers the corresponding power reduction operation, the operation must be maintained for at least a predetermined duration before it can be determined whether to cancel the operation based on the temperature drop.

8. An adaptive power consumption management system for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, characterized in that, The system is applied to the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds as described in any one of claims 1 to 7; the system includes a temperature monitoring module, a strategy control module, and a power execution module; The temperature monitoring module is configured to monitor the temperature of at least one key chip in the millimeter-wave radar system. The strategy control module is configured to store multiple temperature thresholds and power reduction operation strategies corresponding to each temperature threshold range. The multiple temperature thresholds include at least a first threshold, a second threshold, and a third threshold. The power consumption execution module is configured to perform corresponding power reduction operations in response to the instructions of the strategy control module; The strategy control module is further configured to: when the temperature detected by the temperature monitoring module exceeds the first threshold but does not exceed the second threshold, control the power consumption execution module to perform a first type of power reduction operation; when the detected temperature exceeds the second threshold but does not exceed the third threshold, control the power consumption execution module to perform a second type of power reduction operation in addition to the first type of power reduction operation; when the detected temperature exceeds the third threshold, control the power consumption execution module to perform a third type of power reduction operation in addition to the first and second types of power reduction operations. The impact of the first, second, and third types of power reduction operations on the performance of millimeter-wave radar increases sequentially.

9. The adaptive power consumption management system for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds according to claim 8, characterized in that, The strategy control module is also configured to implement hysteresis control logic, which includes temperature hysteresis logic and / or time hysteresis logic, to prevent frequent switching of the power reduction operation strategy near the temperature threshold. The key chip includes at least one of a radar main chip and a power management chip.

10. An adaptive power management platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds, characterized in that, The system includes a processor, a memory, and a control program for an adaptive power management platform for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds. The processor executes the control program, which is stored in the memory. This control program implements the adaptive power management method for vehicle-mounted millimeter-wave radar based on multi-level temperature thresholds as described in any one of claims 1 to 7.

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