Emergency brake notification system and method thereof

Abstract

The invention relates to notification of vehicle information, in particular to an emergency brake notification system capable of reducing the collision condition. The emergency brake notification system comprises a monitoring circuit and a processing circuit. The monitoring circuit is used for monitoring a first distance between a target vehicle and a front vehicle and a second distance between the target vehicle and a rear vehicle. The processing circuit is used for judging whether the first distance is smaller than or equal to a first distance threshold value. When it is judged that the first distance is smaller than or equal to the first distance threshold value, the processing circuit detects a brake signal of the target vehicle. When the brake signal is not detected, the processing circuit judges whether the emergency brake probability of the target vehicle is larger than a probability threshold value or not according to the distance and judges whether the second distance is smaller than a second distance threshold value or not. When the sudden brake probability is judged to be larger than the probability threshold value and the second distance is judged to be smaller than the second distance threshold value, the processing circuit generates and sends an early warning message to the rear vehicle.

Description

Technical Field

[0001] The present invention relates to vehicle information notification, and more particularly to an emergency brake notification system and method thereof that can reduce rear-end collision situations. Background Art

[0002] The driver of a vehicle can decelerate by stepping on the brake pedal while driving on the road. However, if the driver of a vehicle suddenly steps on the brake and the vehicle behind does not notice (for example, the driver is not paying attention to the driving) or does not keep a safe distance, a rear-end collision accident may occur, which may be irreversible. Summary of the invention

[0003] Therefore, an object of the present invention is to provide an emergency brake notification system and method thereof that can reduce rear-end collision situations.

[0004] In one embodiment, the present invention provides an emergency braking system. This emergency braking system includes a monitoring circuit and a processing circuit. The monitoring circuit is arranged on a target vehicle and is used to monitor a first distance between the target vehicle and a front vehicle and a second distance between the target vehicle and a rear vehicle. The processing circuit is used to determine whether the first distance is less than or equal to a first distance threshold. When it is determined that the first distance is less than or equal to the first distance threshold, the processing circuit detects a braking signal of the target vehicle. When the braking signal is not detected, the processing circuit determines whether a probability of an emergency brake of the target vehicle is greater than a probability threshold according to the first distance, and determines whether the second distance is less than a second distance threshold. When it is determined that the probability of an emergency brake is greater than the probability threshold and the second distance is less than the second distance threshold, the processing circuit generates and sends a pre-warning message to the rear vehicle.

[0005] In particular, when the brake signal is detected after the pre-warning message is sent, the processing circuit generates and sends an emergency warning message to the rear vehicle.

[0006] In particular, it further comprises: a data acquisition circuit, which is arranged on the target vehicle and used to acquire a plurality of vehicle-mounted data of the target vehicle; and a data sorting circuit, which is used to collect a braking data of the target vehicle according to the vehicle-mounted data, and calculate the first distance threshold according to the braking data.

[0007] Particularly, the braking data includes a general braking data and an emergency braking data, the data sorting circuit sorts the vehicle data into the general braking data or the emergency braking data according to a braking degree of each vehicle data, and the data sorting circuit calculates the first distance threshold according to the general braking data.

[0008] In particular, when the braking signal is not detected, the processing circuit further calculates an average emergency braking starting distance between the target vehicle and the vehicle in front based on the emergency braking data, and the processing circuit determines whether the emergency braking probability is greater than the probability threshold based on the first distance and the average emergency braking starting distance.

[0009] In one embodiment, the present invention provides an emergency brake notification method. The emergency brake notification method includes: monitoring a first distance between a target vehicle and a front vehicle; determining whether the first distance is less than or equal to a first distance threshold; detecting a brake signal of the target vehicle when the first distance is determined to be less than or equal to the first distance threshold; when the brake signal is not detected, determining whether a probability of an emergency brake of the target vehicle is greater than a probability threshold according to the first distance, and determining whether a second distance between the target vehicle and a rear vehicle is less than a second distance threshold; and generating and sending a pre-warning message to the rear vehicle when the probability of an emergency brake is determined to be greater than the probability threshold and the second distance is determined to be less than the second distance threshold.

[0010] In particular, it further includes: when the brake signal is detected after the pre-warning message is sent, an emergency warning message is generated and sent to the rear vehicle.

[0011] In particular, the method further includes: capturing a plurality of vehicle-mounted data of the target vehicle; collecting a braking data of the target vehicle according to the vehicle-mounted data; and calculating the first distance threshold according to the braking data.

[0012] In particular, the braking data includes a general braking data and an emergency braking data, the step of collecting the braking data of the target vehicle based on the on-board data is to organize the on-board data into the general braking data or the emergency braking data according to a braking degree of each of the on-board data, and the step of calculating the first distance threshold based on the braking data is to calculate the first distance threshold based on the general braking data.

[0013] In particular, the step of determining whether the probability of the sudden braking of the target vehicle is greater than the probability threshold based on the first distance includes: calculating an average sudden braking starting distance between the target vehicle and the vehicle in front based on the emergency braking data; calculating the sudden braking probability based on the first distance and the average sudden braking starting distance; and determining whether the sudden braking probability is greater than the probability threshold.

[0014] In summary, the emergency brake notification system and method of any embodiment can detect the brake signal of the target vehicle through the processing circuit when the first distance between the target vehicle and the front vehicle is less than or equal to the first distance threshold. If the brake signal is not detected, the processing circuit will generate and send the pre-warning message to the rear vehicle when it is determined that the emergency braking probability of the target vehicle reaches the probability threshold and the second distance between the target vehicle and the rear vehicle is less than the second distance threshold, so as to pre-promptly remind the rear vehicle that the front vehicle (i.e., the target vehicle) has a high probability of emergency braking. In this way, the chain collision caused by the rear vehicle's inability to react in time can be reduced.

[0015] The detailed features and advantages of the present invention are described in detail in the following implementation examples, and the contents are sufficient to enable anyone skilled in the relevant art to understand the technical contents of the present invention and implement them accordingly. Moreover, based on the contents disclosed in this specification, the claims and the drawings of the specification, any person skilled in the relevant art can easily understand the relevant purposes and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 A block diagram of an embodiment of an emergency brake notification system;

[0018] Figure 2 A schematic diagram of the relationship between the target vehicle and the vehicle in front and the vehicle behind;

[0019] Figure 3 A flow chart of an embodiment of an emergency brake notification method;

[0020] Figure 4 is a flowchart of an embodiment of step S70; and

[0021] Figure 5 FIG. 4 is a flow chart of an embodiment after step S80. DETAILED DESCRIPTION

[0022] Before the present invention is described in detail, it should be noted that similar elements are denoted by the same reference numerals in the following description.

[0023] It must be understood that the word "comprising" used in this specification is used to indicate the existence of specific technical features, values, method steps, operation processing and components, but does not exclude the addition of more technical features, values, method steps, operation processing, components, or any combination of the above.

[0024] It is worth noting that in order to clearly illustrate the present invention, Figure 1 It is a simplified block diagram, which only shows the components related to the present invention. Those skilled in the art should understand that the emergency brake notification system 100 may also include other components to provide specific functions.

[0025] Figure 1 is a block diagram of an embodiment of an emergency brake notification system, and Figure 2 Schematic diagram of the relationship between the target vehicle C1, the front vehicle C2 and the rear vehicle C3. Figure 1 and Figure 2 In some embodiments, the emergency brake notification system 100 includes a monitoring circuit 110 and a processing circuit 120. The processing circuit 120 is coupled to the monitoring circuit 110. In other embodiments, the emergency brake notification system 100 may further include a data acquisition circuit 130 and a data sorting circuit 140. The processing circuit 120 is coupled to the monitoring circuit 110, the data acquisition circuit 130 and the data sorting circuit 140.

[0026] The monitoring circuit 110 is disposed on the target vehicle C1. The monitoring circuit 110 can be used to monitor in real time a first distance A1 between the target vehicle C1 and a preceding vehicle C2 in the same lane and a second distance A2 between the target vehicle C1 and a following vehicle C3 in the same lane, and transmit the monitored first distance A1 and second distance A2 to the processing circuit 120.

[0027] In some embodiments, the monitoring circuit 110 may include at least two photographic elements (hereinafter referred to as photographic elements 111 and 112, respectively) and a processing element 113. The photographic element 111 is disposed in front of the target vehicle C1, and is used to capture a continuous image I1 in front of the front of the target vehicle C1. The photographic element 112 is disposed at the rear of the target vehicle C1, and is used to capture a continuous image I2 behind the rear of the target vehicle C1. The processing element 113 is disposed in the target vehicle C1 and coupled to the photographic elements 111 and 112 to receive the aforementioned continuous image I1 and continuous image I2. Here, the processing element 113 may process the continuous image I1 through, for example but not limited to, image recognition, to obtain a first distance A1 between the target vehicle C1 and the front vehicle C2 (i.e., the distance from the rear of the front vehicle C2 to the front of the target vehicle C1) from the continuous image I1. Similarly, the processing element 113 can also process the continuous image I2 through image recognition to obtain the second distance A2 between the target vehicle C1 and the rear vehicle C3 (ie, the distance from the rear of the target vehicle C1 to the front of the rear vehicle C3) from the continuous image I2.

[0028] The data acquisition circuit 130 is disposed on the target vehicle C1 and can be used to continuously acquire vehicle data D1 of the target vehicle C1. In some embodiments, the vehicle data D1 may include but is not limited to the vehicle speed V1, brake signal S1, brake strength G1 of the target vehicle C1 or any combination thereof.

[0029] In some embodiments, the data acquisition circuit 130 can obtain the speed V1 of the target vehicle C1 through the global positioning system (GPS) coordinates, or can obtain the time when the target vehicle C1 passes through the lane line through image recognition continuous images I1 to infer the speed V1 of the target vehicle C1. In addition, the data acquisition circuit 130 can determine the braking time of the target vehicle C1 through the G-value waveform changes detected by the gravity sensor (G-sensor) and calculate the corresponding braking strength G1 for each braking. In other embodiments, the data acquisition circuit 130 can also obtain the speed V1, brake signal S1 and brake strength G1 of the target vehicle C1 by connecting to the on-board diagnostics system (OBD).

[0030] The data sorting circuit 140 continuously collects a braking data D2 of the target vehicle C1, and calculates a first distance threshold T1 according to the braking data D2. In some embodiments, the braking data D2 may include multiple braking information, and each braking information is related to a braking behavior of the target vehicle C1 (i.e., the action of the driver of the target vehicle C1 stepping on the brake pedal once).

[0031] In some embodiments, the data sorting circuit 140 can receive each vehicle data D1 captured by the data acquisition circuit 130 to sort out the brake data D2 according to the multiple vehicle data D1. In some implementations, the data sorting circuit 140 can be directly connected to the data acquisition circuit 130 to obtain the vehicle data D1. In other implementations, the data sorting circuit 140 can also be connected to the processing circuit 120 to indirectly obtain the vehicle data D1 through the processing circuit 120.

[0032] In some embodiments, the braking data D2 may include but is not limited to the starting distance information when braking begins (i.e., the distance between the target vehicle C1 and the vehicle in front C2 when braking begins), the braking intensity G1, the braking action time information, and the distance information after braking (i.e., the distance between the target vehicle C1 and the vehicle in front C2 after braking).

[0033] In some embodiments, the data sorting circuit 140 may collect the braking data D2 according to the road type. For example, the data sorting circuit 140 may collect the braking information about braking in each vehicle data D1 including the target vehicle C1 driving on an urban road into one braking data D2, and collect the braking information about braking in each vehicle data D1 including the target vehicle C1 driving on a highway into another braking data D2.

[0034] In some embodiments, the data sorting circuit 140 can collect the braking data D2 according to the braking strength G1 in each vehicle-mounted data D1. Specifically, the data sorting circuit 140 can sort the braking information about the braking in the vehicle-mounted data D1 into the emergency braking data D21 or the general braking data D22 according to the braking strength G1 in each vehicle-mounted data D1. Specifically, the data sorting circuit 140 can know that the target vehicle C1 has experienced a 2.94m / s acceleration time according to a peak value of 0.3G generated by the gravity sensor after the target vehicle C1 brakes, which is maintained for a specific number of seconds and then gradually decays. 2 deceleration braking process. In other words, the braking intensity G1 of each braking can be represented by a G value waveform. In some embodiments, the data sorting circuit 140 can use 0.5G as a classification boundary. For example, the data sorting circuit 140 can sort the braking information about braking in each vehicle-mounted data D1 with a G value waveform with a peak value lower than 0.5G into the general braking data D22, and sort the braking information about braking in each vehicle-mounted data D1 with a G value waveform with a peak value exceeding 0.5G into the emergency braking data D21.

[0035] In some embodiments, the data sorting circuit 140 may collect only the braking information about braking in the vehicle data D1 when the speed V1 of the target vehicle C1 exceeds a predetermined speed into the braking data D2. In some implementations, the predetermined speed may be set to be above 20 kilometers.

[0036] In some embodiments, the data sorting circuit 140 can collect the braking information about braking in the relevant vehicle data D1 into the braking data D2 according to the road type, the braking strength G1, the speed V1 of the target vehicle C1, or a combination thereof. For example, the data sorting circuit 140 can only collect the vehicle data D1 exceeding the predetermined speed, and sort the braking information about braking in each vehicle data D1 into the emergency braking data D21 and the general braking data D22 according to the braking strength G1 in each vehicle data D1.

[0037] In some embodiments, the data sorting circuit 140 can perform calculations based on the general braking data D22 to obtain an average starting distance between the driver of the target vehicle C1 and the front vehicle C2 under general braking conditions, and use this average starting distance as the first distance threshold T1. In other words, the first distance threshold T1 represents the average distance between the target vehicle C1 and the front vehicle C2 under general braking conditions in the past. In some embodiments, the first distance threshold T1 can be, for example, 15 meters, but the present invention is not limited thereto.

[0038] In some embodiments, the data sorting circuit 140 can further perform calculations based on the emergency braking data D21 to obtain an average braking intensity T2 of the driver of the target vehicle C1 when performing emergency braking. In other words, the average braking intensity T2 represents the average braking intensity of the target vehicle C1 in previous emergency braking situations. In some embodiments, for example, the value is 0.57G, but the present invention is not limited thereto.

[0039] In some embodiments, the monitoring circuit 110, the processing circuit 120, the data acquisition circuit 130, and the data sorting circuit 140 can be integrated into a digital video recorder (DVR). In other embodiments, the data acquisition circuit 130 can be implemented using an on-board diagnostics system (OBD), and the monitoring circuit 110, the processing circuit 120, and the data sorting circuit 140 are integrated into a digital video recorder. In other embodiments, the data acquisition circuit 130 and the monitoring circuit 110 can be integrated into a digital video recorder or implemented separately by an on-board diagnostics system and a digital video recorder, and the processing circuit 120 and the data sorting circuit 140 are integrated into a vehicle-mounted host installed in the target vehicle. In some other embodiments, the data acquisition circuit 130 and the monitoring circuit 110 may be integrated with a digital video recorder or respectively implemented with an on-board diagnostic system and a digital video recorder, the processing circuit 120 may be implemented with an on-board host, and the data sorting circuit 140 may be implemented with a remote server. In other embodiments, the data acquisition circuit 130, the monitoring circuit 110, and the processing circuit 120 may be integrated with a digital video recorder, or the data acquisition circuit 130 may be implemented with an on-board diagnostic system and the monitoring circuit 110 and the processing circuit 120 may be integrated with a digital video recorder, and the data sorting circuit 140 may be implemented with a remote server.

[0040] In some embodiments, the processing circuit 120 is an embedded controller (EC) in a digital video recorder or a vehicle-mounted host, a system on a chip (SoC), a central processing unit (CPU), a microcontroller (MCU), an application-specific integrated circuit (ASIC), an application processor (AP), a digital signal processor (DSP), a programmable logic device (PLD), or any other suitable electronic component.

[0041] Figure 3 This is a flow chart of an embodiment of an emergency brake notification method. Figures 1 to 3 . The emergency brake notification system 100 can execute the emergency brake notification method of any embodiment. In one embodiment of the emergency brake notification method, the data capture circuit 130 of the emergency brake notification system 100 captures the vehicle data D1 generated by the target vehicle C1 during driving (step S10), and the data sorting circuit 140 collects the multiple vehicle data D1 captured by the data capture circuit 130 and sorts the multiple vehicle data D1 into braking data D2. For example, the data sorting circuit 140 can sort the information about the braking part of each vehicle data D1 into braking data D2 according to the braking intensity G1 in the vehicle data D1 and subdivide it into emergency braking data D21 or general braking data D22 (step S20).

[0042] In some embodiments, the data sorting circuit 140 determines whether the number of brake information included in the general brake data D22 reaches a first predetermined number. After determining that the number of brake information included in the general brake data D22 reaches the first predetermined number, the data sorting circuit 140 further determines whether the number of emergency brake information included in the emergency brake data D21 reaches a second predetermined number. In some implementations, the first predetermined number and the second predetermined number are positive integers greater than 1, and the numbers can be determined according to the accuracy required by the design.

[0043] In some embodiments, when the data sorting circuit 140 determines that the number of braking information included in the general braking data D22 reaches the first predetermined number and the number of braking information included in the emergency braking data D21 reaches the second predetermined number, the data sorting circuit 140 calculates the first distance threshold T1 according to the general braking data D22 (step S30), and calculates the average braking intensity T2 according to the emergency braking data D21. When the data sorting circuit 140 determines that the number of braking information included in the general braking data D22 reaches the first predetermined number but the number of braking information included in the emergency braking data D21 does not reach the second predetermined number, the data sorting circuit 140 obtains the first distance threshold T1 according to the general braking data D22 (step S30), and uses a default braking intensity as the average braking intensity T2 of the target vehicle C1. After obtaining the first distance threshold T1 and the average braking intensity T2, the data sorting circuit 140 may transmit the first distance threshold T1 and the average braking intensity T2 to the processing circuit 120 to enable the emergency brake notification function of the target vehicle C1.

[0044] In some implementations, the default braking intensity may be, but is not limited to, calculated based on emergency braking data D21 of other vehicles.

[0045] In one embodiment of the emergency brake notification method, the monitoring circuit 110 of the emergency brake notification system 100 can monitor the first distance A1 between the target vehicle C1 and the front vehicle C2 according to the continuous image I1 captured by the camera element 111 through the processing element 113 (step S40), and transmit the monitored first distance A1 to the processing circuit 120. In some embodiments, the monitoring circuit 110 can transmit the currently monitored first distance A1 to the processing circuit 120 at a fixed monitoring frequency.

[0046] After receiving the first distance A1 each time, the processing circuit 120 compares the first distance A1 with the first distance threshold T1 to determine whether the first distance A1 is less than or equal to the first distance threshold T1 (step S50). When the processing circuit 120 determines in step S50 that the first distance A1 is greater than the first distance threshold T1, the processing circuit 120 returns and executes step S50 again. When the processing circuit 120 determines in step S50 that the first distance A1 is less than or equal to the first distance threshold T1, the processing circuit 120 detects the brake signal S1 of the target vehicle C1 (step S60).

[0047] When the processing circuit 120 detects the braking signal S1 of the target vehicle C1 in step S60 , the emergency brake notification system 100 may end the process or return to step S40 to re-execute the process.

[0048] When the processing circuit 120 fails to detect the braking signal S1 of the target vehicle C1 in step S60, the processing circuit 120 will calculate an emergency braking probability of the target vehicle C1 based on the emergency braking data D21 and a probability model, and determine whether the emergency braking probability is greater than a default probability threshold, and at the same time determine whether the second distance A2 between the target vehicle C1 and the rear vehicle C3 is less than a second distance threshold (step S70).

[0049] Figure 4 FIG. 1 is a flow chart of an embodiment of step S70. Figures 1 to 4 . In some embodiments of step S70, the processing circuit 120 will first calculate based on the emergency braking data D21 to obtain an average emergency braking starting distance between the target vehicle C1 and the front vehicle C2 when an emergency braking occurs (step S71). Afterwards, the processing circuit 120 can use the braking data D2 of the target vehicle C1's past emergency braking as the sample space within an interval formed by the current first distance A1 detected in real time, the average emergency braking starting distance, and the license plate position of the front vehicle C2 to establish a probability distribution model for the probability of the target vehicle C1's emergency braking as the distance changes. In the case of collecting the braking data D2 of the target vehicle C1 as the sample space, the data type also meets the conditions that the result of the probability of each event (emergency braking) is between 0 and 1 and the sum of the probability of each event is 1. Therefore, the probability mass function (ProbabilityMass) that describes the discrete distribution of emergency braking can be used but is not limited to. Function-PMF) is used to obtain the size of the probability distribution of sudden braking of the target vehicle C1 at each distance position in the interval (step S72), and determine whether the sudden braking probability is greater than a predetermined probability threshold (step S73), that is, to calculate the probability size distribution of the target vehicle C1 that may initiate sudden braking when the target vehicle C1 moves to each position over time within the aforementioned interval. In addition, the processing circuit 120 obtains the second distance A2 between the target vehicle C1 and the rear vehicle C3 from the monitoring circuit 110 to determine whether the second distance A2 is greater than a second distance threshold (step S74). In some embodiments, the predetermined probability threshold may be 70%, 80% or 90%, but the present invention is not limited thereto, and the value of the probability threshold may depend on the design.

[0050] In some embodiments of step S72, the processing circuit 120 uses the probability mass function of the discrete random variable in the interval range, and can, but is not limited to, divide the interval into multiple small segments of equal length at a length of every 2 meters, and calculate the probability of the target vehicle C1 suddenly braking in the small segment when the current first distance A1 detected by the target vehicle C1 satisfies each small segment of equal length due to the forward movement. When the current first distance A1 of the target vehicle C1 is equal to the average sudden braking starting distance, the sudden braking probability is defined as 50%, and when the current first distance A1 is equal to the distance closest to the front vehicle C2 in the emergency braking data D21 and the emergency braking is initiated, the sudden braking probability is defined as 100%. In addition, the processing circuit 120 can be further based on the current driving environment of the target vehicle C1 (for example, through the monitoring circuit 110 and / or the data acquisition circuit 130 to know whether the current driving environment is uphill, downhill, rainy, low ambient light, too bright ambient light, etc.), which may lead to poor vision and reduced visibility, and the driver's sense of distance in front of the vehicle becomes worse, resulting in an increase in the braking frequency or braking force of the vehicle driver. Therefore, when the driving environment meets the above conditions, the corresponding coefficient weighting of the probability of emergency braking can be given through parameters.

[0051] In some embodiments of step S74, the processing circuit 120 sends a control signal to the monitoring circuit 110, so that the processing element 113 of the monitoring circuit 110 starts to monitor the second distance A2 between the target vehicle C1 and the rear vehicle C3 according to the continuous image I2 captured by the imaging element 112, and the monitoring circuit 110 transmits the monitored second distance A2 to the processing circuit 120. In other words, the monitoring circuit 110 may start to monitor the second distance A2 between the target vehicle C1 and the rear vehicle C3 only when the processing circuit 120 does not detect the brake signal S1 of the target vehicle C1 in step S60. However, the present invention is not limited thereto. In other embodiments, the monitoring circuit 110 may monitor the second distance A2 between the target vehicle C1 and the rear vehicle C3 while monitoring the first distance A1 between the target vehicle C1 and the front vehicle C2, and transmit the monitored second distance A2 to the processing circuit 120 only when the processing circuit 120 does not detect the brake signal S1 of the target vehicle C1 in step S60.

[0052] In some implementations, the second distance threshold may be the safe distance that should be maintained between the target vehicle C1 and the rear vehicle C3, which is calculated and set by the processing circuit 120 according to the vehicle speed V1 in the vehicle data D1. For example, when the vehicle speed V1 in the vehicle data D1 is 60 kilometers per hour, the processing circuit 120 defines the safe distance based on the vehicle's overall braking history, which is the time required for driving reaction plus the time required for braking. For example, the time required for driving reaction of the rear vehicle C3 (0.2 seconds) is used as the benchmark, and the speed of the rear vehicle C3 is estimated based on the proportion of the rear vehicle C3 in the image. The speed of the rear vehicle C3 is given a braking time (for example, 2 seconds), thereby determining the second distance threshold to be 37 meters. In addition, other traffic environment parameters can be added according to actual conditions to assist in setting the second distance threshold, such as but not limited to confirming through images whether the rear vehicle C3 is a large-tonnage vehicle, such as a gravel truck, a flatbed truck, a cement premix truck, etc. When it is confirmed that it meets the conditions of a large-tonnage vehicle, considering that the weight and load level of such vehicles are large, the time from brake activation to brake stop is significantly increased compared to ordinary vehicles, and the time required for braking can be further adjusted to 2 times, and the second distance threshold is increased from 37 meters to 70 meters to send a warning notification in advance for large-tonnage vehicles.

[0053] In some implementations, the second distance threshold can also be referenced by detecting road surface (type) conditions (dry land / wet land / uphill / downhill). When the driving environment is in a wet land or downhill, which has an effect on the vehicle's braking time tending to be prolonged, a corresponding coefficient weighting is given so that the second distance threshold can be appropriately increased. By dynamically enabling the above-mentioned traffic environment parameters, the second distance threshold is flexibly adjusted, so that when the target vehicle C1 brakes urgently, the processing circuit 120 determines whether to issue a warning notification based on the status of the rear vehicle C3 and the driving environment, thereby improving the accuracy and notification effect of the warning notification.

[0054] In some embodiments, when the processing circuit 120 determines in step S73 that the sudden braking probability is less than or equal to the probability threshold, the processing circuit 120 may return to step S72 to continue tracking the sudden braking probability (for example, obtaining the current sudden braking probability based on the current first interval A1 again).

[0055] In some embodiments, when the processing circuit 120 determines in step S73 that the sudden braking probability is greater than the probability threshold and in step S74 that the second interval A2 is greater than or equal to the second distance threshold, the processing circuit 120 may return to step S74 again to track the second interval A2.

[0056] In some embodiments, when the processing circuit 120 determines in step S73 that the probability of emergency braking is greater than the probability threshold, and in step S74 determines that the second distance A2 is less than the second distance threshold, the processing circuit 120 generates a pre-warning message M1 and sends the pre-warning message M1 to the rear vehicle C3 (step S80), thereby pre-notifying the rear vehicle C3 that its front vehicle (i.e., the target vehicle C1) has a high probability of emergency braking. In this way, the situation of a chain collision due to the rear vehicle C3's inability to react in time can be reduced.

[0057] Figure 5 FIG. 1 is a flow chart of an embodiment after step S80. Figures 1 to 5 In one embodiment of the emergency brake notification method, after sending the pre-warning message M1 in step S80, the processing circuit 120 can further detect the brake signal S1 of the target vehicle C1 (step S90). When the processing circuit 120 detects the brake signal S1 of the target vehicle C1 in step S90, the processing circuit 120 generates an emergency warning message M2 and sends the emergency warning message M2 to the rear vehicle C3 (step S100).

[0058] In some embodiments, the processing circuit 120 can send the pre-warning message M1 and / or the emergency warning message M2 in the form of a small area broadcast. In this way, all vehicles within a certain range behind the target vehicle C1 will receive the pre-warning message M1 and / or the emergency warning message M2. In some embodiments, the pre-warning message M1 and / or the emergency warning message M2 can be a text message, and the pre-warning message M1 and / or the emergency warning message M2 can be displayed on the dashboard or head-up display of the rear vehicle C3, for example. In other embodiments, the pre-warning message M1 and / or the emergency warning message M2 can also be a voice message, and the pre-warning message M1 and / or the emergency warning message M2 can, for example, emit a sound or warning speech through the audio system of the rear vehicle C3. In other embodiments, the processing circuit 120 can also send the pre-warning message M1 and / or the emergency warning message M2 to the rear vehicle C3 through the lights of the target vehicle C1, such as the taillights. Here, the pre-warning message M1 and / or the emergency warning message M2 is a light signal, such as lighting a corresponding color light or flashing a light in a corresponding lighting manner.

[0059] In some embodiments, during the entire process of the emergency brake notification method, the processing circuit 120 will continue to compare the first distance A1 from the monitoring circuit 110 with the first distance threshold T1 to continuously determine whether the first distance A1 is still less than or equal to the first distance threshold T1. Once the processing circuit 120 determines that the first distance A1 is greater than the first distance threshold T1, the emergency brake notification system 100 can end the entire process or return to step S40 to re-execute the process.

[0060] In summary, the emergency brake notification system 100 and method of any embodiment can detect the brake signal S1 of the target vehicle C1 through the processing circuit 120 when the first distance A1 between the target vehicle C1 and the front vehicle C2 is less than or equal to the first distance threshold T1. When the brake signal S1 is not detected, the processing circuit 120 will generate and send a pre-warning message M1 to the rear vehicle when it is determined that the probability of the emergency brake of the target vehicle C1 reaches the probability threshold and the second distance A2 between the target vehicle C1 and the rear vehicle C3 is less than the second distance threshold, so as to pre-promptly remind the rear vehicle C3 that the front vehicle (i.e., the target vehicle C1) has a high probability of emergency braking. In this way, the chain collision caused by the rear vehicle C3 due to insufficient reaction can be reduced.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An emergency brake notification system, It is characterized in that Include: A monitoring circuit is disposed on a target vehicle and is used to monitor a first distance between the target vehicle and a front vehicle and a second distance between the target vehicle and a rear vehicle; as well as A processing circuit is used to determine whether the first distance is less than or equal to a first distance threshold, wherein when it is determined that the first distance is less than or equal to the first distance threshold, the processing circuit detects a braking signal of the target vehicle, wherein when the braking signal is not detected, the processing circuit determines whether a probability of an emergency brake of the target vehicle is greater than a probability threshold based on the first distance, and determines whether the second distance is less than a second distance threshold, wherein when it is determined that the probability of emergency brake is greater than the probability threshold and the second distance is less than the second distance threshold, the processing circuit generates and sends a pre-warning message to the rear vehicle.

2. The emergency brake notification system according to claim 1, It is characterized in that When the brake signal is detected after the pre-warning message is sent, the processing circuit generates and sends an emergency warning message to the rear vehicle.

3. The emergency brake notification system according to claim 1, It is characterized in that Also includes: a data acquisition circuit, disposed on the target vehicle and used to acquire a plurality of vehicle-mounted data of the target vehicle; and A data sorting circuit is used to collect braking data of the target vehicle according to the vehicle-mounted data, and calculate the first distance threshold according to the braking data.

4. The emergency brake notification system according to claim 3, It is characterized in that The braking data includes general braking data and emergency braking data. The data sorting circuit sorts the vehicle data into the general braking data or the emergency braking data according to a braking degree of each vehicle data, and the data sorting circuit calculates the first distance threshold according to the general braking data.

5. The emergency brake notification system according to claim 4, It is characterized in that When the braking signal is not detected, the processing circuit further calculates an average emergency braking starting distance between the target vehicle and the vehicle in front according to the emergency braking data, and the processing circuit determines whether the emergency braking probability is greater than the probability threshold according to the first distance and the average emergency braking starting distance.

6. An emergency brake notification method, It is characterized in that Include: Monitoring a first distance between a target vehicle and a preceding vehicle; Determining whether the first distance is less than or equal to a first distance threshold; When it is determined that the first distance is less than or equal to the first distance threshold, detecting a brake signal of the target vehicle; When the braking signal is not detected, determining whether a probability of an emergency braking of the target vehicle is greater than a probability threshold according to the first distance, and determining whether a second distance between the target vehicle and a rear vehicle is less than a second distance threshold; and When it is determined that the sudden braking probability is greater than the probability threshold and when it is determined that the second distance is less than the second distance threshold, a pre-warning message is generated and sent to the rear vehicle.

7. The emergency brake notification method according to claim 6, It is characterized in that Also includes: When the brake signal is detected after the pre-warning message is sent, an emergency warning message is generated and sent to the rear vehicle.

8. The emergency brake notification method according to claim 6, It is characterized in that Also includes: Retrieving a plurality of vehicle-mounted data of the target vehicle; Collecting braking data of the target vehicle according to the vehicle-mounted data; and The first distance threshold is calculated according to the braking data.

9. The emergency brake notification method according to claim 8, It is characterized in that The braking data includes general braking data and emergency braking data. The step of collecting the braking data of the target vehicle based on the on-board data is to organize the on-board data into the general braking data or the emergency braking data according to a braking degree of each on-board data, and the step of calculating the first distance threshold based on the braking data is to calculate the first distance threshold based on the general braking data.

10. The emergency brake notification method according to claim 9, It is characterized in that The step of determining whether the probability of the sudden braking of the target vehicle is greater than the probability threshold according to the first distance comprises: Calculating an average emergency braking starting distance between the target vehicle and the front vehicle according to the emergency braking data; Calculate the sudden braking probability according to the first spacing and the average sudden braking starting spacing; as well as It is determined whether the sudden braking probability is greater than the probability threshold.

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