Parking radar self-adaptive alarm sound control method

Abstract

The invention discloses a parking radar self-adaptive alarm sound control method. The method comprises the steps that radar prompt standard alarm volume parameters are preset; acquiring environment noise data; adjusting the radar prompt standard alarm volume parameter by adopting the environmental noise data to obtain a radar alarm volume parameter in the noise environment; and executing a radar alarm function corresponding to the adjusted radar alarm volume parameter in a parking state. The method has the advantages that the influence of environmental noise on the radar prompt tone is reduced as much as possible by adaptively adjusting the radar sound, the alarm sound is effectively and reliably reminded to a driver, and parking accidents caused by the fact that the parking radar sound cannot be obtained by a user due to the noise are reduced.

Description

Technical Field

[0001] The present invention relates to the field of automotive reminder control, and particularly to a method for controlling an adaptive alarm sound of a parking radar. Background Art

[0002] In the prior art, the vehicle configuration rate of low-speed parking radar systems is very high. For the reminder of the distance between the obstacle detected by the radar and the vehicle, it mainly realizes the human-machine interaction through the alarm reminder sound and the display of different graphics on the screen. And the auditory sound reminder is a very important interaction medium, which can remind the distance between the vehicle and the obstacle without the user having to shift the line of sight to observe the outside of the vehicle, thus avoiding losses caused to the user by vehicle collision accidents.

[0003] However, the parking radar alarm sound in the prior art has the following defects:

[0004] 1. In the prior art, in order to highlight the alarm reminder sound, only the music or Bluetooth call sound that is being played is reduced or paused, and part of the radar reminder sound may be covered by the relatively large ambient sound;

[0005] 2. In the prior art, in order to achieve a better alarm reminder sound, the size of the radar alarm sound is increased separately, but after actual user use, there are many complaints that the volume is too large in a quiet environment, causing discomfort;

[0006] 3. In the prior art, in order to ensure a better radar alarm effect, the reminder volume is generally set to a fixed value and cannot be adjusted, which cannot meet the personalized needs of users. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for controlling an adaptive alarm sound of a parking radar, which adaptively adjusts the radar sound to minimize the influence of ambient noise on the radar reminder sound and effectively and reliably reminds the driver of the alarm sound.

[0008] In order to achieve the above purpose, the technical solution adopted by the present invention is: a method for controlling an adaptive alarm sound of a parking radar, including:

[0009] Pre-setting the radar reminder standard alarm volume parameter;

[0010] Obtaining ambient noise data;

[0011] Adjusting the radar reminder standard alarm volume parameter with the ambient noise data to obtain the radar alarm volume parameter in the noise environment;

[0012] Executing the radar alarm function corresponding to the adjusted radar alarm volume parameter in the parking state.

[0013] The in-vehicle microphone is used to obtain the ambient noise signal and convert it into an electrical signal, which is sent to the audio control unit. The audio control unit adjusts the standard alarm volume parameter according to the noise signal.

[0014] A volume correction value is calculated based on the ambient noise data, and the standard alarm volume parameter is superimposed with the volume correction value as the adjusted radar alarm volume parameter.

[0015] A noise threshold is set. When the ambient noise data is greater than the noise threshold, the volume correction value is positive; otherwise, it is negative. And the absolute value of the volume correction value is adjusted according to the magnitude of the ambient noise data.

[0016] After entering the parking state, the opening state data of the current window is recorded, and then all the windows are closed. After parking is completed, the windows are controlled to return to the recorded opening state.

[0017] The vehicle speed is detected in real time. After the vehicle speed is lower than the set vehicle speed, the ambient noise data is obtained, and the standard alarm volume parameter of the radar prompt is adjusted based on the ambient noise data.

[0018] The method further includes a user fine-tuning step:

[0019] The user enters the fine-tuning parameter through the in-vehicle interaction module, and the adjusted second radar alarm volume parameter is obtained by superimposing the volume correction value, the fine-tuning parameter, and the standard alarm volume parameter.

[0020] When the user fine-tuning parameter is entered, the user's identity information is recorded. When the vehicle starts, the driver's identity information is obtained and compared with the recorded user identity information. If the comparison is consistent, the radar alarm reminder is controlled according to the second radar alarm volume parameter; otherwise, the radar alarm reminder is controlled according to the radar alarm volume parameter.

[0021] Volume evaluation is performed on the adjusted radar alarm volume parameter, and text reminders are sent to the people in the vehicle according to the volume evaluation.

[0022] When the adjusted radar alarm volume parameter is greater than the sound intensity threshold, a text reminder is sent; otherwise, no sound reminder is sent.

[0023] The advantages of the present invention are as follows: By adaptively adjusting the radar sound to minimize the impact of environmental noise on the radar prompt sound, the alarm sound can be effectively and reliably reminded to the driver, reducing parking accidents caused by the inability of the user to obtain the parking radar sound due to noise. Compared with the prior art, this solution provides a function of automatically adjusting the size of the alarm sound in scenarios with obvious or quiet environmental noise, which not only reduces the discomfort of the user in quiet scenarios but also increases the safety in noisy scenarios. This patent uses the existing hardware devices of the vehicle and adds simple logical judgments to the audio control unit software, achieving a relatively low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following briefly describes the content expressed in each drawing of the present invention specification and the marks in the drawings:

[0025] Figure 1 It is a control principle flowchart of the adaptive alarm sound control method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the specific embodiments of the present invention in detail by describing the optimal embodiments with reference to the drawings.

[0027] Embodiment 1:

[0028] The method for the parking radar to adaptively prompt the alarm sound is as Figure 1 shown:

[0029] 1. Through the in-vehicle microphone, usually the built-in Bluetooth call microphone or other voice interaction microphones of the vehicle, the environmental noise is obtained and converted into an electrical signal and given to the audio control unit;

[0030] 2. The audio control unit is generally a multimedia navigation host or a cockpit controller. After obtaining the environmental volume, it is compared with the calibrated volume of the radar reminder alarm. This calibrated volume can be a commonly used fixed value (usually 60 dB) or other values calibrated according to different vehicles. When the environmental sound is greater than the calibrated volume, the radar alarm volume is increased; when the environmental volume is less than the calibrated volume, the radar alarm sound prompt is reduced.

[0031] 3. After being processed by the audio control unit, it is output to the speaker for playback through its internal audio power amplifier. The final output volume can be output according to the actual vehicle personnel's feelings after collecting parameters in typical environments, and the speaker is controlled to emit the radar reminder signal during parking according to the increased or decreased radar alarm sound volume.

[0032] This patent solves the defects of the prior art: The existing radar alarm sound is output at a fixed size. In scenarios with obvious environmental noise, the distance information cannot be reliably transmitted to the user. This patent uses the existing hardware devices of the vehicle and adds an environmental noise determination logic to the audio control unit to optimize and solve this problem.

[0033] The beneficial effects of this patent compared with the background technology are as follows:

[0034] 1. Compared with the background technology, this patent provides an automatic adjustment function for the alarm sound volume in scenarios with obvious or quiet environmental noise, which not only reduces the discomfort of users in quiet scenarios but also increases the safety in noisy scenarios;

[0035] 2. By utilizing the existing hardware devices of the vehicle and adding simple logical judgments to the software of the audio control unit, this patent has a relatively low implementation cost.

[0036] Embodiment 2:

[0037] A method for controlling the adaptive alarm sound of a parking radar provided in this embodiment adjusts the radar prompt sound by means of noise correction, so that the radar prompt sound adjusts the sound volume according to the size of the noise, thereby realizing a reliable sound reminder, reducing or avoiding noise interference with the radar alarm sound, and thus improving the user experience of the radar alarm during parking.

[0038] A method for controlling the adaptive alarm sound of a parking radar in this embodiment includes the following steps:

[0039] Pre-set the standard alarm volume parameter for radar prompts;

[0040] Obtain environmental noise data;

[0041] Adjust the standard alarm volume parameter for radar prompts with the environmental noise data to obtain the radar alarm volume parameter in the noise environment;

[0042] Execute the radar alarm function corresponding to the adjusted radar alarm volume parameter in the parking state.

[0043] The standard alarm volume parameter for radar prompts is the parameter for the radar to emit alarms with different volumes according to different detected obstacles, that is, it is a pre-calibrated comparison table or Map between radar detected obstacles and corresponding alarm volumes. The Map is calibrated in a pre-experimental environment. In the normal situation without noise interference, the alarm volume parameter obtained using this comparison table can effectively emit alarms without being too loud or too small. However, the actual vehicle use environment is not the noise-free theoretical experimental environment, and the noise in the vehicle use environment is unpredictable. Therefore, in order to meet the needs of different people, this solution corrects with noise on the basis of the standard alarm volume parameter to obtain the volume size corresponding to the radar alarm in the current noise environment, so as to meet the needs of users.

[0044] In order to collect noise and reduce the increase in hardware costs, the in-vehicle microphone hardware can be reused to collect environmental noise. The in-vehicle microphone is used to obtain the environmental noise signal and convert it into an electrical signal, which is then sent to the audio control unit. The audio control unit adjusts the standard alarm volume parameter according to the noise signal. After collecting the noise data with the microphone and converting it into an electrical signal, it is sent to the controller, and the radar alarm sound is corrected according to the solution of this embodiment to control the radar sound. The controller can use the in-vehicle audio control unit, thus achieving cost savings.

[0045] In this embodiment, the adjusted radar alarm volume parameters include a first radar alarm volume parameter and a second radar alarm volume parameter.

[0046] Regarding the first radar alarm volume parameter:

[0047] A volume correction value is calculated based on the environmental noise data, and the standard alarm volume parameter is superimposed with the volume correction value as the adjusted first radar alarm volume parameter.

[0048] Regarding the second radar alarm volume parameter:

[0049] The user enters a fine-tuning parameter through the in-vehicle interaction module, and the adjusted second radar alarm volume parameter is obtained by superimposing the volume correction value, the fine-tuning parameter, and the standard alarm volume parameter. The in-vehicle interaction module includes, but is not limited to, in-vehicle buttons, touch screens, etc., and the user enters a fine-tuning parameter. The fine-tuning parameter can be positive or negative, mainly to incorporate the user's opinion to better meet the user's experience. For example, when the vehicle radar alarm reminder is given through the first radar alarm volume parameter value and the user does not feel satisfied, the user can manually enter a fine-tuning parameter, which can be positive or negative. Then, by fine-tuning the first radar alarm volume parameter value, the second radar alarm volume parameter value is obtained to better match the user's needs.

[0050] In this embodiment, when the user fine-tuning parameter is entered, the user's identity information is recorded. After the vehicle starts, the driver's identity information is obtained and compared with the recorded user identity information. If the comparison is consistent, the radar alarm reminder is controlled according to the second radar alarm volume parameter; otherwise, the radar alarm reminder is controlled according to the radar alarm volume parameter.

[0051] If the user has made fine-tuning, the parameters after the user's fine-tuning should be satisfied as much as possible. That is, the driver's identity ID can be obtained through various means such as in-vehicle cameras and fingerprint modules, and then compared with the previously recorded identity. The second radar alarm volume parameter value after the user's fine-tuning is preferably used. If there is no fine-tuning or no matching identity information, the control is still carried out according to the first radar alarm volume parameter value to meet the actual needs of the user.

[0052] A noise-based correction value, which is superimposed by the user on the radar prompt standard alarm volume parameter to obtain the first radar alarm volume parameter. The setting of the volume correction value includes setting a noise threshold. When the ambient noise data is greater than the noise threshold, the volume correction value is a positive number; otherwise, it is a negative number. And the absolute value of the volume correction value is adjusted according to the magnitude of the ambient noise data. When the noise is greater than the noise threshold, the greater the noise, the positive volume correction value and the greater the absolute value of the correction value follow the increase of the noise. On the contrary, when the noise is less than the noise threshold, the smaller the noise, the smaller the absolute value of the correction value, and the maximum and minimum value ranges of the correction value are pre-calibrated. The value range of the correction value fluctuates with the fluctuation of the noise within the pre-calibrated maximum and minimum value ranges.

[0053] In this embodiment, according to the detected first radar alarm volume parameter value and the second radar alarm volume parameter value, in the parking state, when the radar alarms, the first radar alarm volume parameter value or the second radar alarm volume parameter value is read to control the in-vehicle alarm signal to emit an alarm sound.

[0054] In a preferred solution, after entering the parking state, the opening state data of the current window is recorded, and then all the windows are closed. After parking is completed, the windows are controlled to return to the recorded window opening state. Closing the windows can reduce the influence of external noise on the interior of the vehicle, reduce the influence of the superposition of external environmental noise, improve the user experience, and avoid the radar reminder sound being too loud in the case of very large external noise, which affects the user experience.

[0055] In this application, the acquisition of noise and the calculation of the radar alarm volume parameter value are carried out according to the set conditions. When the vehicle speed is detected in real time, after the vehicle speed is lower than the set vehicle speed, the ambient noise data is obtained, and the radar prompt standard alarm volume parameter is adjusted based on the ambient noise data. Since the parking radar alarm sound is only emitted in the low-speed parking state, as long as the low-speed state is detected, the noise can be obtained and the first radar alarm volume parameter value or the second radar alarm volume parameter value can be calculated in real time.

[0056] In order to reduce the impact of the increase or decrease of the radar sound on the vehicle occupants inadvertently, a corresponding reminder signal can be sent through the in-vehicle display screen to remind the driver or the vehicle occupants of the reason for the abnormal radar sound at this time. The volume of the adjusted radar alarm volume parameter is evaluated, and a text reminder is sent to the vehicle occupants according to the volume evaluation. When the adjusted radar alarm volume parameter is greater than the sound intensity threshold, a text reminder is sent; otherwise, no sound reminder is sent. The sound intensity threshold can be set according to the sound acceptance of the human ear. For example, when it is set to 40 decibels, the radar alarm sound exceeding 40 decibels may scare the vehicle occupants or affect the comfort of the vehicle occupants. Therefore, a text reminder needs to be sent in advance to further improve the user experience of the radar reminder during parking.

[0057] Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A parking radar adaptive alarm sound control method, characterized in that: include: Pre-set radar prompt standard alarm volume parameters; Obtain environmental noise data; The radar warning volume parameters in a noisy environment are obtained by adjusting the radar prompt standard alarm volume parameters using environmental noise data; The radar alarm function corresponding to the adjusted radar alarm volume parameter is executed in the parking state.

2. The parking radar adaptive alarm sound control method according to claim 1, characterized in that: The microphone in the car is used to obtain the environmental noise signal and convert it into an electrical signal and send it to the audio control unit. The audio control unit then adjusts the standard alarm volume parameters according to the noise signal.

3. A parking radar adaptive alarm sound control method as claimed in claim 1 or 2, characterized in that: A volume correction value is calculated based on the environmental noise data, and the standard alarm volume parameter is superimposed on the volume correction value to serve as the adjusted radar alarm volume parameter.

4. The parking radar adaptive alarm sound control method as claimed in claim 3, characterized in that: Set the noise threshold. When the ambient noise data is greater than the noise threshold, the volume correction value is a positive number, otherwise it is a negative number. The absolute value of the volume correction value is adjusted according to the size of the ambient noise data.

5. A parking radar adaptive alarm sound control method as claimed in claim 1 or 2, characterized in that: After entering the parking state, the current window opening status data is recorded, and then all the windows are closed. After parking is completed, the windows are controlled to return to the recorded window opening state.

6. A parking radar adaptive alarm sound control method according to any one of claims 1 to 4, characterized in that: The vehicle speed is detected in real time, and the environmental noise data is obtained when the vehicle speed is lower than the set speed. The radar prompt standard alarm volume parameters are adjusted based on the environmental noise data.

7. A parking radar adaptive alarm sound control method according to any one of claims 1 to 4, characterized in that: The method also includes a user fine-tuning step: The user enters the fine-tuning parameters through the vehicle-mounted interactive module, and obtains the adjusted second radar alarm volume parameters by superimposing the volume correction value, fine-tuning parameters and standard alarm volume parameters.

8. The parking radar adaptive alarm sound control method according to claim 7, characterized in that: The user's identity information is recorded when entering the user fine-tuning parameters. When the vehicle is started, the driver's identity information is obtained and compared with the recorded user identity information. If the comparison is consistent, the radar alarm reminder is controlled according to the second radar alarm volume parameter, otherwise the radar alarm reminder is controlled according to the radar alarm volume parameter.

9. A parking radar adaptive alarm sound control method according to any one of claims 1 to 4, characterized in that: The volume of the adjusted radar alarm volume parameters is evaluated, and text reminders are issued to the occupants of the vehicle based on the volume evaluation.

10. The parking radar adaptive alarm sound control method according to claim 9, characterized in that: When the adjusted radar alarm volume parameter is greater than the sound intensity threshold, a text reminder is issued, otherwise no sound reminder is issued.

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