A method for optimizing performance of a blind zone monitoring system in rainy day scenarios

Abstract

The present application relates to a kind of methods for optimizing the performance of blind area monitoring system under rain scene, including when blind area monitoring function is opened, blind area monitoring system control unit periodically inputs wiper data;In combination with the state of wiper, according to state transition determination condition, rain scene is judged;According to different determination results, state transition is carried out, and two kinds of operations of normal threshold and reduced threshold are implemented, so as to optimize the performance of blind area monitoring system;If it is detected that it is in specific state currently, reduce detection threshold operation is enabled, and normal detection threshold is used in other states.The present application optimizes the performance of blind area monitoring system under rain scene, improves the performance of blind area monitoring system under rain scene by fusing wiper data;From state machine, state transition, threshold strategy and other aspects, the performance of blind area monitoring system under rain scene is described;Design logic is clear, and content is comprehensive;Effect of optimizing the performance of blind area monitoring system can be effectively guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of safe driving assistance technology, specifically relating to a method for optimizing the performance of a blind spot monitoring system in rainy weather. Background Technology

[0002] With the advancement of active safety technologies, blind spot monitoring is gaining popularity. Blind spot monitoring systems use millimeter-wave radar to monitor road users in the driver's blind spots on both sides of the vehicle in real time, issuing alerts or warnings when other road users appear in the blind spot, thus preventing accidents caused by blind spots during lane changes. However, precipitation severely attenuates millimeter-wave radar signals, thus impairing the performance of blind spot monitoring systems in rainy conditions.

[0003] Therefore, there is an urgent need to develop a method to optimize the performance of blind spot monitoring systems in rainy weather scenarios in order to effectively solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a method for optimizing the performance of a blind spot monitoring system in rainy weather. By analyzing the limitations of the blind spot monitoring system in rainy weather, this invention aims to solve the problem of optimizing the performance of the blind spot monitoring system in rainy weather.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for optimizing the performance of a blind spot monitoring system in rainy weather includes the following steps:

[0007] A. When the blind spot monitoring function is enabled, the blind spot monitoring system control unit periodically inputs wiper data;

[0008] B. Based on the status of the windshield wipers and the state transition judgment conditions, determine the rainy scene.

[0009] The state transitions include: from exiting the state to low-speed wiper preparation state, from low-speed wiper preparation state to exiting the state, from exiting the state to high-speed wiper preparation state, from high-speed wiper preparation state to exiting the state, from low-speed wiper preparation state to low-speed wiper activation state, from high-speed wiper preparation state to high-speed wiper activation state, from low-speed activation state to high-speed activation state, from high-speed activation state to low-speed activation state, from low-speed activation state to preparing to exit the state, and from high-speed activation state to preparing to exit the state.

[0010] C. Based on different judgment results, perform state transition and implement two operations: normal threshold and lowered threshold, thereby optimizing the performance of the blind spot monitoring system;

[0011] If the system detects that the current state is Low_Enter, High_Enter, or Exit_Prepare, it will enable the operation of lowering the detection threshold; otherwise, it will use the normal detection threshold.

[0012] Further, in step B, the conditions for determining whether to enter the low-speed wiper preparation state from the exit state and the exit state from the low-speed wiper preparation state are as follows:

[0013] When the following conditions are met simultaneously, the device will transition from the exit state to the low-speed wiper preparation state.

[0014] a. The vehicle speed is greater than LOW_WIPER_SPEED_START;

[0015] b. The wipers are currently running at low speed;

[0016] The wiper will transition from the low-speed wiper preparation state to the exit state when any of the following conditions are met.

[0017] a. Do not use the low speed setting on the windshield wipers;

[0018] b. The vehicle speed is lower than LOW_WIPER_SPEED_START;

[0019] Among them, LOW_WIPER_SPEED_START is 40 km / h.

[0020] Furthermore, in step B, the conditions for determining whether to enter the high-speed wiper preparation state from the exit state and the exit state from the high-speed wiper preparation state are as follows:

[0021] When the following conditions are met simultaneously, the system will transition from the exit state to the high-speed wiper preparation state.

[0022] a. The vehicle speed is greater than LOW_WIPER_SPEED_START;

[0023] b. The wipers are currently set to high speed;

[0024] The system will transition from the high-speed wiper preparation state to the exit state when any of the following conditions are met:

[0025] a. Do not use the high speed setting on the windshield wipers.

[0026] Further, in step B, the conditions for determining whether to transition from the low-speed wiper preparation state to the low-speed wiper activation state and from the high-speed wiper preparation state to the high-speed wiper activation state are as follows:

[0027] When the following conditions are met simultaneously, the wiper will switch from the low-speed wiper preparation state to the low-speed wiper activation state.

[0028] a. The wipers are currently running at low speed;

[0029] b. The cumulative time from Low Prepare satisfies LOW_WIPER_TIME_KEEP;

[0030] When the following conditions are met simultaneously, the system will switch from the high-speed wiper preparation state to the high-speed wiper activation state.

[0031] a. The windshield wipers are currently running at high speed;

[0032] b. The accumulated time from High Prepare satisfies HIGH_WIPER_TIME_KEEP;

[0033] Among them, LOW_WIPER_TIME_KEEP is 60s and HIGH_WIPER_TIME_KEEP is 30s.

[0034] Further, in step B, the conditions for determining whether a state transitions from a low-speed activation state to a high-speed activation state or from a high-speed activation state to a low-speed activation state are as follows:

[0035] Condition 7: When the following conditions are met, the system will transition from a low-speed activation state to a high-speed activation state;

[0036] a. The windshield wipers are currently running at high speed;

[0037] Condition 8: When the following conditions are met, the system will transition from high-speed activation to low-speed activation.

[0038] a. The wipers are currently running at low speed.

[0039] Further, in step B, the conditions for determining whether a state transitions from a low-speed activation state to a ready-to-exit state, from a high-speed activation state to a ready-to-exit state, and from a ready-to-exit state to an exit state are as follows:

[0040] Condition 9: When the following conditions are met, the system will transition from the low-speed activation state to the preparation to exit state.

[0041] a. The wipers are currently off;

[0042] Condition 10: When the following conditions are met, the system will transition from the high-speed activation state to the preparation to exit state;

[0043] a. The wipers are currently off;

[0044] Condition 11: When the following conditions are met simultaneously, the state will transition from the preparation to exit state to the exit state.

[0045] a. The wipers are currently off;

[0046] b. The cumulative time from Exit Prepare satisfies WIPER_OFF_EXIT;

[0047] WIPER_OFF_EXIT is set to 60 seconds.

[0048] Further: Step C, state exit stage, normal threshold; low gear preparation stage, normal threshold; low gear activation stage, in lowered threshold state; high gear preparation stage, normal threshold; high gear activation stage, in lowered threshold state; preparation to exit stage, in lowered threshold state.

[0049] Further: In step C, based on the radar detection characteristics, the radar detection area is divided into sixteen sequences from 0 to 15, with each detection range being 6 meters. The threshold reduction value for each range segment is as follows:

[0050] When the sequence is 0, the threshold is lowered to 3dB; when the sequence is 1, the threshold is lowered to 3dB; when the sequence is 2, the threshold is lowered to 5dB; when the sequence is 3, the threshold is lowered to 2dB; when the sequence is 4, the threshold is lowered to 0dB; when the sequence is 5, the threshold is lowered to 0dB; when the sequence is 6, the threshold is lowered to 2dB; when the sequence is 7, the threshold is lowered to 3dB; when the sequence is 8, the threshold is lowered to 3dB; when the sequence is 9, the threshold is lowered to 2dB; when the sequence is 10, the threshold is lowered to 2dB; when the sequence is 11, the threshold is lowered to 1dB; when the sequence is 12, the threshold is lowered to 0dB; when the sequence is 13, the threshold is lowered to 0dB; when the sequence is 14, the threshold is lowered to 0dB; when the sequence is 15, the threshold is lowered to 0dB.

[0051] Compared with the prior art, the beneficial effects of the present invention are:

[0052] This invention provides a method for optimizing the performance of a blind spot monitoring system in rainy weather. By integrating windshield wiper data, the method improves the performance of the blind spot monitoring system in rainy weather. The invention explains the optimization of the blind spot monitoring system's performance in rainy weather from multiple aspects, including state machine, state transition, and threshold strategy. The design logic is clear and the content is comprehensive, effectively ensuring the performance optimization effect of the blind spot monitoring system. Attached Figure Description

[0053] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is the state transition diagram of the present invention;

[0055] Figure 2 This is a flowchart of the steps of the present invention. Detailed Implementation

[0056] The present invention will be further described below with reference to embodiments:

[0057] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0058] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0059] like Figure 2 As shown, the method for optimizing the performance of a blind spot monitoring system in rainy weather scenarios according to the present invention includes the following steps:

[0060] A. When the blind spot monitoring function is enabled, the blind spot monitoring system control unit periodically inputs wiper data;

[0061] B. Consider the status of the windshield wipers, such as Figure 1 The rainy scene is judged based on the state transition judgment conditions;

[0062] The state transition determination conditions are as follows:

[0063] Condition 1: When the following conditions are met simultaneously, the device will enter the low-speed wiper preparation state from the exit state.

[0064] a. The vehicle speed is greater than LOW_WIPER_SPEED_START;

[0065] b. The wipers are currently running at low speed.

[0066] Condition 2: When any of the following conditions are met, the wiper will transition from the low-speed wiper preparation state to the exit state;

[0067] a. Do not use the low speed setting on the windshield wipers;

[0068] b. The vehicle speed is lower than LOW_WIPER_SPEED_START.

[0069] Condition 3: When the following conditions are met simultaneously, the system will transition from the exit state to the high-speed wiper preparation state.

[0070] a. The vehicle speed is greater than LOW_WIPER_SPEED_START;

[0071] b. The wipers are currently running at high speed.

[0072] Condition 4: When any of the following conditions are met, the system will transition from the high-speed wiper preparation state to the exit state;

[0073] a. Do not use the high speed setting on the windshield wipers.

[0074] Condition 5: When the following conditions are met simultaneously, the wiper will switch from the low-speed wiper preparation state to the low-speed wiper activation state.

[0075] a. The wipers are currently running at low speed;

[0076] b. The cumulative time from Low Prepare meets LOW_WIPER_TIME_KEEP.

[0077] Condition 6: When the following conditions are met simultaneously, the system will switch from the high-speed wiper preparation state to the high-speed wiper activation state.

[0078] a. The windshield wipers are currently running at high speed;

[0079] b. The accumulated time from High Prepare satisfies HIGH_WIPER_TIME_KEEP. Condition 7: When the following conditions are met, the system transitions from low-speed activation state to high-speed activation state;

[0080] a. The wipers are currently running at high speed.

[0081] Condition 8: When the following conditions are met, the system will transition from high-speed activation to low-speed activation.

[0082] a. The wipers are currently running at low speed.

[0083] Condition 9: When the following conditions are met, the system will transition from the low-speed activation state to the preparation to exit state.

[0084] a. The wipers are currently off.

[0085] Condition 10: When the following conditions are met, the system will transition from the high-speed activation state to the preparation to exit state;

[0086] a. The wipers are currently off.

[0087] Condition 11: When the following conditions are met simultaneously, the state will transition from the preparation to exit state to the exit state.

[0088] a. The wipers are currently off;

[0089] b. The cumulative time from Exit Prepare satisfies WIPER_OFF_EXIT.

[0090] The parameters in the above conditions are explained in Table 1:

[0091] Table 1

[0092] Parameter name value unit LOW_WIPER_SPEED_START 40 Km / h LOW_WIPER_TIME_KEEP 60 Second HIGH_WIPER_TIME_KEEP 30 Second WIPER_OFF_EXIT 60 Second

[0093] C. Based on different judgment results, perform state transition and implement two operations: normal threshold and lowered threshold, thereby optimizing the performance of the blind spot monitoring system;

[0094] The state machine description during state transitions is shown in Table 2:

[0095] Table 2

[0096] Serial Number name illustrate 0 Exit State exit phase, normal threshold 1 Low_Prepare Low-speed gear preparation phase, normal threshold 2 Low_Enter During the low-speed gear activation phase, the threshold is lowered. 3 High_Prepare High gear preparation phase, normal threshold 4 High_Enter During the high-speed gear activation phase, the threshold is lowered. 5 Exit_Prepare In the preparation for exit, the threshold is lowered.

[0097] If the system detects that the current state is Low_Enter, High_Enter, or Exit_Prepare, it will enable the operation of lowering the detection threshold; otherwise, it will use the normal detection threshold.

[0098] Based on the radar detection characteristics, the radar detection area is divided into sixteen sequences (detection range segments) from 0 to 15, with each detection range segment consisting of 6 meters. The threshold reduction values ​​for each range segment are shown in Table 3.

[0099] Table 3

[0100] sequence 0 1 2 3 4 5 6 7 Lower the threshold (db) 3 3 5 2 0 0 2 3 sequence 8 9 10 11 12 13 14 15 Lower the threshold (db) 3 2 2 1 0 0 0 0

[0101] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method of optimizing performance of a blind spot monitoring system in rainy weather scenarios, characterized in that, The method comprises the following steps: A. When the blind area monitoring function is turned on, the blind area monitoring system control unit periodically inputs wiper data; B. In combination with the state of the wiper, the rainy day scene is judged according to the state transition judgment condition; Wherein, the state transition includes entering the low-speed wiper preparation state from the exit state, entering the exit state from the low-speed wiper preparation state, entering the high-speed wiper preparation state from the exit state, entering the exit state from the high-speed wiper preparation state, entering the low-speed wiper activation state from the low-speed wiper preparation state, entering the high-speed wiper activation state from the high-speed wiper preparation state, entering the high-speed activation state from the low-speed activation state, entering the low-speed activation state from the high-speed activation state, entering the preparation exit state from the low-speed activation state, and entering the preparation exit state from the high-speed activation state; C. According to different judgment results, state transition is performed, and normal threshold and reduced threshold operations are implemented, so as to optimize the performance of the blind area monitoring system; If it is detected that the current state is Low Enter, High Enter or Exit Prepare, the reduced detection threshold operation is enabled, and the normal detection threshold is used in other states.

2. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is characterized by, The judgment conditions for entering the low-speed wiper preparation state from the exit state and entering the exit state from the low-speed wiper preparation state in step B are as follows: When the following conditions are met at the same time, the low-speed wiper preparation state is entered from the exit state; a. The vehicle speed is greater than LOW_WIPER_SPEED_START; b. The current wiper is in a low-speed state; When any of the following conditions is met, the exit state is entered from the low-speed wiper preparation state; a. The wiper does not use the low-speed gear; b. The vehicle speed is lower than LOW_WIPER_SPEED_START; Wherein, LOW_WIPER_SPEED_START is 40Km / h.

3. The method of claim 2, wherein the performance of the blind zone monitoring system in a rainy scenario is optimized, and The judgment conditions for entering the high-speed wiper preparation state from the exit state and entering the exit state from the high-speed wiper preparation state in step B are as follows: When the following conditions are met at the same time, the high-speed wiper preparation state is entered from the exit state; a. The vehicle speed is greater than LOW_WIPER_SPEED_START; b. The current wiper is in a high-speed state; When any of the following conditions is met, the exit state is entered from the high-speed wiper preparation state; a. The wiper does not use the high-speed gear.

4. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is characterized by, The judgment conditions for entering the low-speed wiper activation state from the low-speed wiper preparation state and entering the high-speed wiper activation state from the high-speed wiper preparation state in step B are as follows: When the following conditions are met at the same time, the low-speed wiper activation state is entered from the low-speed wiper preparation state; a. The current wiper is in a low-speed state; b. The cumulative time from Low Prepare meets LOW_WIPER_TIME_KEEP; When the following conditions are met at the same time, the high-speed wiper activation state is entered from the high-speed wiper preparation state; a. The current wiper is in a high-speed state; b. The cumulative time from High Prepare meets HIGH_WIPER_TIME_KEEP; Wherein, LOW_WIPER_TIME_KEEP is 60s, and HIGH_WIPER_TIME_KEEP is 30s.

5. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is characterized by, Step B, the determination conditions for entering the high-speed active state from the low-speed active state and entering the low-speed active state from the high-speed active state are as follows: Condition 7: the following conditions are met to enter the high-speed active state from the low-speed active state; a. the current wiper is in the high-speed state; Condition 8: the following conditions are met to enter the low-speed active state from the high-speed active state; a. the current wiper is in the low-speed state.

6. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is characterized by, Step B, the determination conditions for entering the preparation exit state from the low-speed active state, entering the preparation exit state from the high-speed active state, and entering the exit state from the preparation exit state are as follows: Condition 9: the following conditions are met to enter the preparation exit state from the low-speed active state; a. the current wiper is in the off state; Condition 10: the following conditions are met to enter the preparation exit state from the high-speed active state; a. the current wiper is in the off state; Condition 11: the following conditions are met to enter the exit state from the preparation exit state; a. the current wiper is in the off state; b. the cumulative time from Exit Prepare meets WIPER_OFF_EXIT; wherein WIPER_OFF_EXIT is 60s.

7. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is optimized. Step C, state exit phase, normal threshold; low-speed preparation phase, normal threshold; low-speed active phase, in the descending threshold state; high-speed preparation phase, normal threshold; high-speed active phase, in the descending threshold state; preparation exit phase, in the descending threshold state.

8. The method of claim 1, wherein the performance of the optimized blind zone monitoring system in a rainy day scenario is characterized by: Step C, according to the radar detection characteristics, the radar detection area is divided into 0-15, a total of sixteen sequences, detection distance segments, with 6 meters as a detection distance segment, and the threshold reduction value of each distance segment is: when the sequence is 0, the threshold is reduced by 3db; when the sequence is 1, the threshold is reduced by 3db; when the sequence is 2, the threshold is reduced by 5db; when the sequence is 3, the threshold is reduced by 2db; when the sequence is 4, the threshold is reduced by 0db; when the sequence is 5, the threshold is reduced by 0db; when the sequence is 6, the threshold is reduced by 2db; when the sequence is 7, the threshold is reduced by 3db; when the sequence is 8, the threshold is reduced by 3db; when the sequence is 9, the threshold is reduced by 2db; when the sequence is 10, the threshold is reduced by 2db; when the sequence is 11, the threshold is reduced by 1db; when the sequence is 12, the threshold is reduced by 0db; when the sequence is 13, the threshold is reduced by 0db; when the sequence is 14, the threshold is reduced by 0db; when the sequence is 15, the threshold is reduced by 0db.

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