JP-2026075775-A - Computational device and method for evaluating safe driving behavior

JP2026075775AJP 2026075775 AJP2026075775 AJP 2026075775AJP-2026075775-A

Abstract

[Challenge] To detect and evaluate drivers who are mindful of safe driving near pedestrian crossings. [Solution] The computing device according to the embodiment includes a controller. When the controller detects a marking indicating the presence of a pedestrian crossing from an image captured by an in-vehicle camera, it determines whether the driver performed safe driving actions based on sensor data from the in-vehicle sensor. The controller also performs a driving evaluation of the driver based on the determination result of whether the driver performed safe driving actions. [Selection Diagram] Figure 5

Inventors

垣田直士
河野貴
松本裕生
木下翔太
大西康司
伊森宏樹
藤本知之
上林輝彦
三野敦

Assignees

株式会社デンソーテン

Dates

Publication Date: 20260511
Application Date: 20241023

Claims (9)

When the in-vehicle camera detects a sign indicating the presence of a pedestrian crossing in the image it captures, the system determines whether the driver performed safe driving actions based on the sensor data from the in-vehicle sensor. A controller that evaluates the driver's driving based on the determination result of whether or not the driver performed safe driving actions. A computing device equipped with the following features.
The aforementioned controller, Each time it is determined that the driver has not performed safe driving actions, a warning is issued to the driver, and the fewer times such warnings are issued, the higher the driving evaluation is given. The computing device according to claim 1.
The aforementioned controller, If a change in the driver's line of sight from the time the aforementioned marking was detected, or both of the following are detected: a change in the driver's line of sight from the time the aforementioned marking was detected, and/or a deceleration of the vehicle, it is determined that the driver has performed safe driving behavior. The computing device according to claim 1 or 2.
The in-vehicle sensor includes the in-vehicle camera and the acceleration sensor, The aforementioned controller, Image recognition processing of the images captured by the in-vehicle camera detects changes in the markings and the driver's line of sight. Based on the acceleration measured by the acceleration sensor, the vehicle's deceleration is detected. The computing device according to claim 3.
The aforementioned controller, If there is no change in the driver's line of sight from the time the aforementioned marking is detected, and the vehicle's acceleration from that time is 0 or greater, the driver is instructed to look for a person standing beside the pedestrian crossing. The computing device according to claim 4.
The aforementioned marking is a road marking indicating that there is a pedestrian crossing without traffic lights ahead. The arithmetic device according to claim 5.
The aforementioned road markings are multiple diamond-shaped marks arranged in a front-to-back configuration in front of the pedestrian crossing, as viewed from the perspective of a moving vehicle. The aforementioned controller, If, from the moment the first diamond mark among the plurality of diamond marks that is relatively far from the pedestrian crossing is detected, there is no change in the driver's line of sight, or if the acceleration of the vehicle from that point in time is 0 or greater, the driver is given a first warning to look for people standing beside the pedestrian crossing. The computing device according to claim 6.
The aforementioned controller, If, from the moment the driver's line of sight remains unchanged after detecting a second diamond mark among the plurality of diamond marks that is closer to the pedestrian crossing than the first diamond mark, and the vehicle's acceleration from that point onward is 0 or greater, a second warning is issued to the driver, which is stronger than the first warning, to urge them to look for people standing beside the pedestrian crossing. The arithmetic device according to claim 7.
A method for evaluating safe driving behavior performed by a controller, When the in-vehicle camera detects a sign indicating the presence of a pedestrian crossing, the system determines whether the driver performed safe driving actions based on sensor data from the in-vehicle sensor. The driver's driving performance is evaluated based on the determination of whether or not the driver performed safe driving actions. A method for evaluating safe driving behavior, including the following.

Description

The embodiments of the disclosure relate to a computing device and a method for evaluating safe driving behavior. Conventionally, technologies are known that detect the driver's actions based on information from various in-vehicle sensors, including cameras, and evaluate the driver's performance based on the detection results. For example, Patent Document 1 proposes a technique to lower a driver's driving evaluation when, in the event of a pedestrian crossing without traffic lights, the driver looks at the pedestrian crossing but passes through without slowing down or stopping the vehicle. Japanese Patent Publication No. 2015-055921 Figure 1 is an overview diagram (part 1) of the safe driving behavior evaluation method according to the embodiment.Figure 2 is an overview diagram (part 2) of the safe driving behavior evaluation method according to the embodiment.Figure 3 is an overview diagram (part 3) of the safe driving behavior evaluation method according to the embodiment.Figure 4 shows an example of the configuration of the operation evaluation system according to the embodiment.Figure 5 shows an example of the configuration of a drive recorder according to the embodiment.Figure 6 shows an example of the configuration of a center device according to an embodiment.Figure 7 shows the processing sequence executed by the operation evaluation system according to the embodiment.Figure 8 is an explanatory diagram illustrating the accuracy of detecting changes in line of sight. The embodiments of the computing device and safe driving behavior evaluation method disclosed herein will be described in detail below with reference to the attached drawings. However, this invention is not limited to the embodiments described below. Furthermore, in the following description, the computing device according to the embodiment is assumed to be either a drive recorder 10 (see Figure 1) or a center device 100 (see Figure 1). The safe driving behavior evaluation method according to the embodiment is assumed to be a safe driving behavior evaluation method executed by the controller 15 of the drive recorder 10 (see Figure 5) or the controller 103 of the center device 100 (see Figure 6). Furthermore, the expressions "specific," "designated," and "certain" in the following explanation can be interpreted as "predetermined." Furthermore, "safe driving behaviors" refer to actions that contribute to safe driving, or actions that are recommended as safe driving. First, an overview of the safe driving behavior evaluation method according to the embodiment will be explained using Figures 1 to 3. Figure 1 is an overview diagram (part 1) of the safe driving behavior evaluation method according to the embodiment. Figure 2 is an overview diagram (part 2) of the safe driving behavior evaluation method according to the embodiment. Furthermore, Figure 3 is an overview diagram (part 3) of the safe driving behavior evaluation method according to the embodiment. In the following explanation using Figures 1 to 8, the case where the drive recorder 10 corresponds to an example of the computing device according to the embodiment is given as the main example. In the safe driving behavior evaluation method according to this embodiment, when the controller 15 of the drive recorder 10 detects a marking indicating the presence of a pedestrian crossing from the image captured by the in-vehicle camera, it determines whether the driver performed safe driving behavior based on the sensor data from the in-vehicle sensor. At this time, the controller 15 determines whether the driver performed safe driving behavior regardless of whether there are people standing beside the pedestrian crossing. Furthermore, the controller 15 performs a driving evaluation of the driver based on the determination result of whether the driver performed safe driving behavior. The drive recorder 10 is a video recording device installed in a vehicle. Specifically, as shown in Figure 1, the drive recorder 10 has an in-vehicle camera 12a, an out-of-vehicle camera 12b, and a G (accelerometer) sensor 12c. The in-vehicle camera 12a is installed to capture in-vehicle video footage. The field of view of the in-vehicle camera 12a is set to capture at least the driver's face. The exterior camera 12b is installed to capture in-vehicle video footage of the area surrounding the vehicle. The field of view of the exterior camera 12b is set to capture at least the area in front of the vehicle. The G-sensor 12c measures the acceleration applied to the drive recorder 10. The in-vehicle camera 12a, exterior camera 12b, and G-sensor 12c are examples of "in-vehicle sensors." The drive recorder 10, while the vehicle is running, records a certain period of operational record data, including sensor data from these on-board sensors (i.e., in-vehicle video, external video, and acceleration), into the ring buffer memory in an overwriteable format. This period is, for example, 24 hours. The operational record data