A speed radar wake-up and energy saving method, intelligent terminal and storage medium

Abstract

The present application relates to a wake-up and energy-saving method for a speed measuring radar, an intelligent terminal and a storage medium, and relates to the field of golf speed measuring technology, which includes periodically powering a radar module to put the radar module in a pulse working mode, monitoring the speed direction information of the object to be measured in the pulse working mode, and judging whether the wake-up trigger condition is met based on the speed direction information. If so, the radar module is switched to a short-time continuous working mode, and several parameters when hitting the ball are calculated in the short-time continuous working mode. The energy-saving effect of the radar is achieved by automatically switching between the pulse working mode and the short-time continuous working mode.

Description

Technical Field

[0001] The present invention relates to the technical field of golf speed measurement, and in particular to a speed measurement radar wake-up and energy saving method, an intelligent terminal and a storage medium. Background Art

[0002] As an outdoor sport, golf has become more and more popular. With the rise of golf, many golf enthusiasts want to improve their skills by understanding their pitching speed or swing speed.

[0003] In the prior art, a user's pitching speed or swing speed is detected by a radar speed measuring product during golf. The radar speed measuring product is usually a portable golf speed measuring radar.

[0004] With regard to the above-mentioned related technologies, the inventor believes that as a portable product, the battery life of golf speed radar is very important. Golf speed radar usually has multiple sets of transceiver modules, has high energy consumption, and starts working as soon as it is turned on, so the battery life is often insufficient during use. Golf is a sport with a large intermittent movement, and the continuous operation of the radar module will waste most of the battery energy. Summary of the invention

[0005] In order to effectively save energy, the present invention provides a wake-up and energy-saving method for a speed measuring radar, an intelligent terminal and a storage medium.

[0006] In the first aspect, the present application provides a speed radar wake-up and energy saving method using the following technical solutions:

[0007] A speed radar wake-up and energy saving method, comprising:

[0008] The radar module is powered periodically to put it in pulse working mode;

[0009] In the pulse working mode, the speed direction information of the object to be measured is monitored;

[0010] Based on the speed direction information, determine whether the wake-up trigger condition is met, and if so, switch the radar module to a short-term continuous working mode;

[0011] In the short-time continuous working mode, several parameters of the ball are measured.

[0012] By adopting the above technical solution, the radar module is periodically powered and the radar is in a periodic working state, so that the radar module does not need to work continuously, thereby achieving energy saving. At the same time, the radar module can still monitor the speed and direction information of the object during the periodic power supply. When it is detected that the speed and direction information of the object reaches the wake-up trigger condition, the radar module will automatically switch to the short-term continuous working mode. In the short-term continuous working mode, the radar module is in a normal working state and there is no need to manually wake up the radar, which helps to improve the convenience and intelligence of the radar.

[0013] Optionally, the step of periodically powering the radar module to put the radar module in a pulse working mode includes:

[0014] Provide a pulse to the radar module every preset sleep time;

[0015] The radar module is powered on continuously for a preset time and then the power supply is stopped.

[0016] By adopting the above technical solution, in the pulse working mode, the power supply of the radar module is intermittent, that is, the radar module stops working and switches to a sleep state after working for a period of time. The radar module consumes no energy in the sleep state, so the energy consumption of the radar module can be reduced in the pulse working mode, which is beneficial to energy saving.

[0017] Optionally, in the pulse working mode, the step of monitoring the speed direction information of the object to be measured includes:

[0018] Acquire electromagnetic signals emitted by radar;

[0019] extracting frequency information based on the electromagnetic signal;

[0020] Based on the frequency information, the speed direction information of the object to be measured is obtained.

[0021] By adopting the above technical solution, in the pulse working mode, when in the power supply period, the radar module sends out an electromagnetic signal, and then extracts the frequency information through the electromagnetic signal, so as to obtain the speed and direction information of the object to be measured.

[0022] Optionally, the step of extracting frequency information based on the electromagnetic signal includes:

[0023] Mixing the electromagnetic signal with a baseband signal received by the radar module and performing a short-time Fourier transform;

[0024] Extract frequency information.

[0025] By adopting the above technical solution, the frequency information is extracted from the mixed signal of the electromagnetic signal and the baseband signal through short-time Fourier transform.

[0026] Optionally, the step of judging whether a wake-up trigger condition is met based on the speed direction information, and if so, switching the radar module to a short-time continuous working mode includes:

[0027] In the pulse working mode, a short-time Fourier transform operation is performed on each segment of the baseband signal;

[0028] Extract Doppler frequency peak;

[0029] Determine whether the Doppler frequency peak has a negative frequency, whether the amplitude of the peak point exceeds the preset amplitude threshold, and whether the rod starting speed is within the preset normal speed range. If so, switch the pulse working mode to the short-time continuous working mode.

[0030] By adopting the above technical solution, short-time Fourier transform is used to determine the frequency of the sine wave in the local area of ​​the baseband signal. Doppler frequency is the Doppler frequency shift, which is the difference between the transmitting frequency and the receiving frequency. The transmitting frequency is related to the radar module. The Doppler frequency obtained after the short-time Fourier transform of the baseband signal is extracted to determine whether a negative frequency appears. The Doppler frequency of the baseband signal is related to the speed direction information, and the amplitude of the baseband signal is related to the distance between the object to be measured and the radar module.

[0031] If a negative frequency appears at the Doppler frequency peak and the amplitude of the peak point exceeds the preset amplitude threshold, it indicates that the shot is about to begin. Adding the judgment condition of whether the starting speed is within the preset normal speed range is helpful to reduce misjudgment.

[0032] When it is determined that the hitting action starts, the radar module is switched from the pulse working mode to the short-time continuous working mode, that is, the radar is converted to a normal working state.

[0033] Optionally, the step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, if all are true, switching the pulse working mode to the short-time continuous working mode comprises:

[0034] The signal with interception points of nfft is subjected to fast Fourier transform with Hanning window, and the spectrum amplitude is calculated.

[0035] Detect peak points through constant false alarm;

[0036] Determine whether the amplitude of the peak point exceeds the amplitude threshold, whether the frequency corresponding to the peak point is a negative number, and whether the pole-starting speed is within the preset normal speed range;

[0037] If both are true, wake up the radar and put the radar module into short-term continuous working mode.

[0038] By adopting the above technical solution, constant false alarm detection is a common radar signal detection method. When the external interference intensity changes, the radar sensitivity is automatically adjusted to keep the false alarm probability of the radar unchanged, so that the radar can continue to work under strong clutter interference. Whether the peak point exceeds the amplitude threshold, whether the frequency corresponding to the peak point is negative, and whether the starting speed is within the preset normal speed range are used to determine whether the hitting action has started, making the judgment more accurate.

[0039] Optionally, the step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, and if all are true, switching the pulse working mode to the short-time continuous working mode also includes:

[0040] At the same time, two segments of signals with the number of points being nfft are intercepted, both are added with Hanning window for fast Fourier transform, and the spectrum amplitude is calculated;

[0041] If the spectrum peak points of the two spectrum amplitudes exceed the preset amplitude threshold, the radar is awakened and enters a short-term continuous working mode.

[0042] By adopting the above technical solution, the purpose of simultaneously intercepting two segments of signals with nfft points is to reduce the probability of false triggering, that is, when the spectrum amplitudes of the two segments of signals with nfft points after fast Fourier transform exceed the preset amplitude threshold, it is judged that the batting action is ready to start, thereby reducing the misjudgment rate.

[0043] Optionally, in the short-time continuous working mode, the step of measuring several parameters when hitting the ball includes:

[0044] During the duration of the preset short-time continuous working mode, a number of ball hitting information are collected, and the duration covers the entire ball hitting process.

[0045] By adopting the above technical solution, since the short-time continuous working mode is the normal working mode, when the preparation for hitting the ball is detected, the duration of the continuous working mode is set to the time required to cover the entire hitting process. The hitting information refers to the hitting speed detected by the radar module, the speed of the golf club, etc.

[0046] In the second aspect, the present application provides a smart terminal that adopts the following technical solution:

[0047] An intelligent terminal comprises a memory and a processor, wherein the memory stores a wake-up and energy-saving program of a speed measuring radar, and the processor is used to adopt any of the above methods when executing the program.

[0048] In a third aspect, a storage medium provided by the present application adopts the following technical solution:

[0049] A storage medium stores a system control program.

[0050] To summarize, in the pulse working mode, the radar module is powered periodically so that the radar module can maintain speed monitoring of the object to be measured during the power supply period. If it is determined that the object to be measured is ready to hit the ball, the radar module will automatically switch to the short-time continuous working mode. By automatically switching between the pulse working mode and the short-time continuous working mode, the energy-saving effect of the radar is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is an overall flow chart of a method for waking up and saving energy of a speed measuring radar according to an embodiment of the present application.

[0052] Figure 2 It is a flow chart of monitoring the speed direction information of an object to be measured in a pulse working mode in a wake-up and energy-saving method of a speed measuring radar in an embodiment of the present application.

[0053] Figure 3 This is a flowchart of a speed measurement radar wake-up and energy saving method in an embodiment of the present application, which determines whether the wake-up trigger condition is met based on speed direction information, and if so, switches the radar module to a short-term continuous working mode.

[0054] Figure 4 This is a flowchart of a method for waking up and saving energy of a speed measuring radar in an embodiment of the present application, for determining whether a negative frequency appears at the Doppler frequency peak, and if so, switching a pulse working mode to a short-time continuous working mode. DETAILED DESCRIPTION

[0055] The embodiment of the present application discloses a wake-up and energy-saving method for a speed measuring radar.

[0056] Reference Figure 1 , a speed radar wake-up and energy saving method includes:

[0057] S100: Periodically power the radar module to put the radar module in a pulse working mode.

[0058] In the pulse working mode, the micro control unit, referred to as MCU (Micro Control Unit), periodically supplies power to the radar module so that the radar module is in working state during the power supply time. The radar module senses the object to be measured during the power supply time, and is in sleep state during the non-power supply time. That is, the radar has no perception ability to the object to be measured during the non-power supply time, thereby reducing the radar energy consumption and achieving energy-saving effect.

[0059] Specifically, the steps of periodically supplying power to the radar module so that the radar module is in a pulse working mode include:

[0060] S101 . Provide a pulse to the radar module at every preset sleep time interval.

[0061] In a specific implementation, the radar module includes a radar, an antenna, a transmitter and a receiver.

[0062] In the radar module, the radar transmit and receive signals share an antenna. When the radar receives a pulse, the radar module switches from a sleep state to an operating state.

[0063] S102, the radar module is continuously powered for a preset power supply time and then the power supply is stopped.

[0064] After receiving the pulse, the radar module enters the working state, and enters the sleep state again after the preset power supply time. For example, the MCU provides a pulse to the radar module every 100ms, so that the radar changes from the sleep state to the working state. The power supply lasts for 20ms, that is, the power supply time is 20ms. The radar module is in the working state within the 20s power supply time. After 20ms, the power supply is stopped, and the radar module changes from the working state to the sleep state.

[0065] In the pulse working mode, the MCU provides intermittent power to the radar module. The radar module stops working after working for a period of time, thereby reducing energy consumption and facilitating energy saving.

[0066] S200 , in the pulse working mode, monitoring the speed direction information of the object to be measured.

[0067] The speed direction information of the object to be measured is the swing speed direction.

[0068] Specifically, refer to Figure 2 , in the pulse working mode, the steps of monitoring the speed direction information of the object to be measured include:

[0069] S201. Acquire electromagnetic signals emitted by a radar.

[0070] Because in the pulse working mode, the MCU intermittently supplies power to the radar module. The radar transmits electromagnetic signals during the power supply time. When the radar module is in the sleep state, the radar does not transmit electromagnetic signals, that is, the MCU cannot obtain the electromagnetic signals emitted by the radar.

[0071] S202. Extract frequency information based on the electromagnetic signal.

[0072] S203: Based on the frequency information, obtain the speed direction information of the object to be measured.

[0073] In a specific implementation, the frequency information is related to the speed direction information. The speed direction information of the object to be measured is the swing speed direction. The swing speed direction of the object to be measured can be obtained through the frequency information.

[0074] Specifically, based on the electromagnetic signal, the steps of extracting frequency information include:

[0075] S202.1. Mix the electromagnetic signal with the baseband signal received by the radar module and perform short-time Fourier transform.

[0076] S202.2. Extract frequency information.

[0077] In a specific implementation, the electromagnetic signal emitted by the radar will reflect back an echo signal when it hits the object to be measured. The antenna in the radar module receives the echo signal, and the receiver in the radar module performs signal processing such as amplification, filtering, and frequency conversion on the echo signal to generate a baseband signal.

[0078] The baseband signal is mixed with the electromagnetic signal emitted by the radar and short-time Fourier transform is performed. Fourier transform is a technology that converts signals into frequencies, that is, a transformation method from time domain to frequency domain. Short-time Fourier transform converts the signal at a certain moment into the instantaneous frequency at that moment. Through short-time Fourier transform, the instantaneous frequency information at a certain moment is extracted from the mixed signal of the electromagnetic signal and the baseband signal.

[0079] S300: Based on the speed direction information, determine whether the wake-up trigger condition is met, and if so, switch the radar module to a short-term continuous working mode.

[0080] The speed direction information is the swing speed direction. In golf, there is a preparatory action of taking the club, that is, swinging the club behind the body. The speed direction of this action is different from the action of hitting the ball. The movement direction of the club and the ball during hitting the ball is forward, while the club head and the shaft move backward during taking the club. This condition can be used as a trigger condition to determine that the shot is about to start. If the swing speed direction is opposite to the movement direction of the club and the ball during hitting the ball, the MCU switches the radar module to the short-term continuous working mode, that is, switches the radar module to the normal working state.

[0081] Specifically, refer to Figure 3 Based on the speed direction information, it is determined whether the wake-up trigger condition is met. If so, the steps of switching the radar module to the short-term continuous working mode include:

[0082] S301. In the pulse working mode, perform short-time Fourier transform operation on each segment of the baseband signal.

[0083] Through short-time Fourier transform, the frequency of each baseband signal at different times is obtained.

[0084] S302: Extract the Doppler frequency peak value.

[0085] The swing speed direction is determined according to the Doppler frequency peak. In the specific implementation, the baseband signal is composed of frequency and amplitude. The frequency and amplitude of the baseband signal will change with the moving state of the object encountered. If the object to be measured is moving in the direction of the radar transmitting the electromagnetic signal, the frequency of the baseband signal received by the receiver will increase accordingly; conversely, if the object to be measured is moving in the opposite direction of the direction of the radar transmitting the electromagnetic signal, the frequency of the baseband signal received by the receiver will decrease accordingly. Therefore, it can be seen that the frequency of the baseband signal is related to the swing speed direction. If the distance between the object to be measured and the radar module gradually increases, the amplitude of the baseband signal received by the receiver will decrease accordingly; conversely, if the distance between the object to be measured and the radar module gradually decreases, the amplitude of the baseband signal received by the receiver will first increase and then decrease. Therefore, it can be seen that the amplitude of the baseband signal is related to the distance between the object to be measured and the radar module.

[0086] S303, determine whether the Doppler frequency peak has a negative frequency, whether the amplitude of the peak point exceeds the preset amplitude threshold, and whether the rod starting speed is within the preset normal speed range. If both are true, switch the pulse working mode to the short-time continuous working mode.

[0087] When the Doppler frequency peak has a negative frequency, it means that the swing direction is opposite to the hitting direction. At this time, it is judged that the golf club is taking off. The amplitude of the peak point exceeds the amplitude threshold, indicating that the distance between the golf club and the radar module is decreasing.

[0088] In a specific implementation, the relative speed between the object to be measured and the radar can be calculated according to the numerical change of the frequency. The corresponding relationship formula between the Doppler frequency and the speed of the object to be measured is as follows:

[0089] v

[0090] Where: v is the target speed (m / s), is the Doppler frequency, is the speed of light (3*10 8 m / s), is the transmitting frequency, is the angle between the radar beam and the target's motion direction.

[0091] In order to further reduce misjudgment, the judgment condition of whether it is within the preset range of pole-starting speed is added. In actual scenes, in addition to golf clubs, there may be other objects, such as fluorescent lamps, rotating electric fans, etc. These objects will also reflect the electromagnetic waves emitted by the radar. These interfering electromagnetic waves will be received by the receiver of the radar module as interference signals. Therefore, the pole-starting speed is calculated by the Doppler frequency, and then it is judged whether the pole-starting speed is within the preset normal speed range, which is conducive to judging the accuracy of the baseband signal and reducing misjudgment. For example, the normal pole-starting speed range is 5 meters per second to 30 meters per second, including 5 meters per second and 30 meters per second. If the pole-starting speed calculated by the baseband signal is within the normal pole-starting speed range, and the calculated pole-starting speed is between 5 meters per second and 30 meters per second, the wake-up trigger condition of the radar module is met, and the pulse working mode of the radar module is converted to the short-term continuous working mode, so that the radar is converted to a normal working state.

[0092] Specifically, refer to Figure 4 The step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, if both are true, switching the pulse working mode to the short-time continuous working mode comprises:

[0093] S304a, intercepting a signal with the number of interception points being nfft, adding a Hanning window to perform a fast Fourier transform, and calculating the spectrum amplitude.

[0094] The Hanning window is a type of window function, and the fast Fourier transform is a general term for efficient and fast calculation methods of discrete Fourier transform using computers, referred to as FFT.

[0095] The spectrum amplitude is calculated by performing fast Fourier transform on the signal with nfft points and the Hanning window.

[0096] S304b, detecting the peak point by using constant false alarm.

[0097] In radar systems, it is usually required to be able to detect the existence of an object to be detected and maintain a given false alarm probability in a background environment that is more complex and uncertain than thermal noise. Constant false alarm detection is currently a commonly used radar detection method.

[0098] S304c, determine whether the amplitude of the peak point exceeds the amplitude threshold, whether the frequency corresponding to the peak point is a negative number, and determine whether the rod lifting speed is within the preset normal speed range.

[0099] S304d: If yes, wake up the radar and make the radar module enter a short-term continuous working mode.

[0100] Specifically, the step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, and if all are true, switching the pulse working mode to the short-time continuous working mode also includes:

[0101] S304e, simultaneously intercept two segments of signals with the number of points being nfft, add Hanning windows to both of them for fast Fourier transform, and calculate the spectrum amplitude.

[0102] S304f. If the spectrum peak points of the two spectrum amplitudes both exceed the amplitude threshold, the radar is awakened and enters a short-term continuous working mode.

[0103] The method of simultaneously intercepting two signals with the number of points of nfft, adding Hanning window to both for fast Fourier transform, and calculating the spectrum amplitude is used to reduce the probability of false triggering.

[0104] S400, in the short-time continuous working mode, measuring several parameters when hitting the ball.

[0105] The short-term continuous working mode of the radar module means that the radar module returns to the normal working mode. Several parameters of the shot include the shot speed, the shot direction and the club speed.

[0106] Specifically, in the short-time continuous working mode, the steps of measuring several parameters when hitting the ball include:

[0107] S401. Collect some ball-hitting information within the duration of a preset short-time continuous working mode, where the duration covers the entire ball-hitting process.

[0108] In the short-time continuous working mode, the radar module works continuously for a period of time to cover the entire batting process. For example, the entire batting process usually lasts for 2-3 seconds, including 2 seconds and 3 seconds. The duration of the short-time continuous working mode is artificially set within 2-3 seconds to cover the entire batting process.

[0109] The implementation principle of a speed radar wake-up and energy-saving method, intelligent terminal and storage medium in the embodiment of the present application is as follows: in the pulse working mode, by periodically powering the radar module, the radar maintains a certain perception ability to the outside world and saves most of the energy at the same time. When the radar senses that the user is about to hit the ball through its limited perception ability, the radar switches to the short-time continuous working mode, which is the normal working mode. In the short-time continuous working mode, the radar working time covers the entire hitting process and is used to measure several parameters during hitting the ball. Energy saving of the radar module is achieved by automatically switching between the pulse working mode and the short-time continuous working mode.

[0110] The embodiment of the present application also discloses a smart terminal.

[0111] An intelligent terminal includes a memory and a processor, wherein the memory stores a wake-up and energy-saving program for a speed measuring radar, and the processor is used to adopt any one of the above-mentioned wake-up and energy-saving methods for a speed measuring radar when executing the program.

[0112] The embodiment of the present application also discloses a storage medium.

[0113] A storage medium stores a system control program.

[0114] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A speed radar wake-up and energy saving method, characterized in that: include: The radar module is powered periodically to put it in pulse working mode; In the pulse working mode, the speed direction information of the object to be measured is monitored; Based on the speed direction information, determine whether the wake-up trigger condition is met, and if so, switch the radar module to a short-term continuous working mode; In the short-time continuous working mode, calculating several parameters when hitting the ball; The step of judging whether the wake-up trigger condition is met based on the speed direction information, and if so, switching the radar module to the short-time continuous working mode includes: In the pulse working mode, a short-time Fourier transform operation is performed on each segment of the baseband signal; Extract Doppler frequency peak; Determine whether the Doppler frequency peak has a negative frequency, whether the amplitude of the peak point exceeds the preset amplitude threshold, and whether the pole-starting speed is within the preset normal speed range. If both are true, switch the pulse working mode to the short-time continuous working mode; Wherein, in the short-time continuous working mode, the step of measuring several parameters when hitting the ball includes: During the preset duration of the short-time continuous working mode, a number of ball-hitting information are collected, and the duration covers the entire ball-hitting process.

2. The method for waking up and saving energy of a speed measuring radar according to claim 1, characterized in that: The step of periodically powering the radar module to put the radar module in a pulse working mode includes: Provide a pulse to the radar module every preset sleep time; The radar module is powered on continuously for a preset time and then the power supply is stopped.

3. The method for waking up and saving energy of a speed measuring radar according to claim 1, characterized in that: In the pulse working mode, the step of monitoring the speed direction information of the object to be measured includes: Acquire electromagnetic signals emitted by radar; extracting frequency information based on the electromagnetic signal; Based on the frequency information, the speed direction information of the object to be measured is obtained.

4. The method for waking up and saving energy of a speed measuring radar according to claim 3, characterized in that: The step of extracting frequency information based on the electromagnetic signal comprises: Mixing the electromagnetic signal with a baseband signal received by the radar module and performing a short-time Fourier transform; Extract frequency information.

5. The method for waking up and saving energy of a speed measuring radar according to claim 1, characterized in that: The step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, and if both are true, switching the pulse working mode to the short-time continuous working mode comprises: The signal with interception points of nfft is subjected to fast Fourier transform with Hanning window, and the spectrum amplitude is calculated. Detect peak points through constant false alarm; Determine whether the amplitude of the peak point exceeds the amplitude threshold, whether the frequency corresponding to the peak point is a negative number, and whether the pole-starting speed is within the preset normal speed range; If both are true, wake up the radar and put the radar module into short-term continuous working mode.

6. The method for waking up and saving energy of a speed measuring radar according to claim 1, characterized in that: The step of judging whether a negative frequency appears at the Doppler frequency peak, whether the amplitude of the peak point exceeds a preset amplitude threshold, and judging whether the rod starting speed is within a preset normal speed range, and if both are true, switching the pulse working mode to the short-time continuous working mode also includes: At the same time, two segments of signals with the number of points being nfft are intercepted, both are added with Hanning window for fast Fourier transform, and the spectrum amplitude is calculated; If the spectrum peak points of the two spectrum amplitudes exceed the amplitude threshold, the radar is awakened and enters a short-term continuous working mode.

7. An intelligent terminal, characterized in that: It comprises a memory and a processor, wherein the memory stores a wake-up and energy-saving program for a speed measuring radar, and the processor is used to adopt a wake-up and energy-saving method for a speed measuring radar according to any one of claims 1 to 6 when executing the program.

8. A storage medium, characterized in that: The storage medium stores a system control program, and when the system control program is executed, the system control program adopts a speed measurement radar wake-up and energy saving method according to any one of claims 1 to 6.

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