Information Processing System and Method for Processing an Information Processing System

Abstract

To determine reproductivity of an unstable behavior by determining whether or not a state of an object area when detecting the unstable behavior is an environment deterioration scene.SOLUTION: An information processing system stores object vehicle data including information related to positions and traveling of a plurality of object vehicles, and determines whether or not reproductivity exists in an unstable behavior when detecting the unstable behavior being a rapid behavior change of the object vehicle. The information processing system includes: an environment deterioration scene determination section for determining whether or not a state of each one of a plurality of predetermined areas is an environment deterioration scene for each predetermined determination time based on the object vehicle data in the areas; and a reproductivity determination section for determining existence of reproductivity in the unstable behavior when it is determined that a state of an object area being an area where the object vehicle travels when detecting the unstable behavior is the environment deterioration scene.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an information processing system and a method for processing an information processing system.

Background Art

[0002] Conventionally, as a technical document related to an information processing system, Japanese Unexamined Patent Application Publication No. 2020-052607 is known. This publication shows an information processing system that determines whether an unstable behavior is caused by a driver when the target vehicle for information collection exhibits an unstable behavior.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in order to statistically utilize the unstable behavior of a vehicle, it is conceivable to focus on the reproducibility of the unstable behavior. It is required to appropriately determine the reproducibility.

Means for Solving the Problems

[0005] One aspect of the present disclosure stores target vehicle data including information on the positions and travel of a plurality of target vehicles, and determines whether there is reproducibility in an unstable behavior, which is a sudden behavior change of a target vehicle, when the unstable behavior is detected. An information processing system includes an environmental deterioration scene determination unit that determines whether the situation in each preset area is an environmental deterioration scene at each preset determination time based on the target vehicle data in a plurality of preset areas, and when it is determined that the situation in the target area, which is the area where the target vehicle is traveling at the time of detection of the unstable behavior, is an environmental deterioration scene, a reproducibility determination unit that determines that there is reproducibility in the unstable behavior. The environmental deterioration scene determination unit calculates the total number of environmental deterioration determination factors in the area within the determination time from the target vehicle data, determines whether the environmental deterioration determination factors in the area within the determination time show an increasing trend from the target vehicle data, and when the total number of unstable behaviors in the area within the determination time is equal to or greater than the first total determination threshold, and the total number of environmental deterioration determination factors in the area within the determination time is equal to or greater than the second total determination threshold, and the environmental deterioration determination factors within the determination time do not show an increasing trend, it determines that the situation of the area at the determination time is an environmental deterioration scene; when the total number of unstable behaviors in the area within the determination time is less than the first total determination threshold, or the total number of environmental deterioration determination factors in the area within the determination time is less than the second total determination threshold, or the environmental deterioration determination factors within the determination time do not show an increasing trend, it does not determine that the situation of the area at the determination time is an environmental deterioration scene. The environmental deterioration determination factors include at least the wiper operation ratio, which is the ratio of the target vehicles that have activated the wiper at least once among the target vehicles staying in the area for a certain period of time. 。

[0007] In an information processing system according to an aspect of the present disclosure, an environmental degradation scene determination unit calculates the duration of an environmental degradation determination factor in an area within a determination time from target vehicle data, and if the duration is less than a continuous determination threshold, it may not be determined that the situation of the area at the determination time is an environmental degradation scene.

[0009] Another aspect of the present disclosure is a processing method of an information processing system that stores target vehicle data including information on the positions and travels of a plurality of target vehicles, and determines whether there is reproducibility in unstable behavior when detecting unstable behavior, which is a sudden behavior change of a target vehicle. Based on the target vehicle data in a plurality of preset areas, a scene determination step of determining whether the situation of each area is an environmental degradation scene for each preset determination time, and a reproducibility determination step of determining that there is reproducibility in the unstable behavior when it is determined that the situation of the target area, which is the area where the target vehicle is traveling at the time of detecting the unstable behavior, is an environmental degradation scene. As shown in the scene determination step, calculate the total number of environmental deterioration determination factors in the area within the determination time from the target vehicle data, determine whether the environmental deterioration determination factors in the area within the determination time show an increasing trend from the target vehicle data, and when the total number of unstable behaviors in the area within the determination time is equal to or greater than the first total determination threshold, and the total number of environmental deterioration determination factors in the area within the determination time is equal to or greater than the second total determination threshold, and the environmental deterioration determination factors within the determination time do not show an increasing trend, it determines that the situation of the area at the determination time is an environmental deterioration scene; when the total number of unstable behaviors in the area within the determination time is less than the first total determination threshold, or the total number of environmental deterioration determination factors in the area within the determination time is less than the second total determination threshold, or the environmental deterioration determination factors within the determination time show an increasing trend, it does not determine that the situation of the area at the determination time is an environmental deterioration scene. The environmental deterioration determination factors include at least the wiper operation ratio, which is the ratio of the target vehicles that have activated the wiper at least once among the target vehicles staying in the area for a certain period of time. 。

Advantages of the Invention

[0010] According to an aspect and another aspect of the present disclosure, it is possible to determine the reproducibility of unstable behavior by determining whether the situation of the target area at the time of detecting the unstable behavior is an environmental degradation scene.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0013] FIG. 1 is a diagram showing an information processing system 100 according to an embodiment. As shown in FIG. 1, in the information processing system 100, target vehicles 2 (target vehicles 2A to 2Z) are communicably connected to the information processing server 10 via the network N. The network N is a wireless communication network. As long as it is wireless communication, a well-known network can be adopted for the network N. The target vehicle 2 is a vehicle that is an information collection target of the information processing system 100.

[0014] FIG. 2 is a diagram for explaining the detection of unstable behavior. As shown in FIG. 2, when the target vehicle 2A slips due to road surface freezing or the like, the target vehicle 2A transmits target vehicle data including information on the position where the slip occurred (unstable behavior position D) to the information processing server 10. The information processing server 10 provides information on unstable behavior to, for example, the target vehicle 2B traveling behind the target vehicle 2A. Thereby, in the target vehicle 2B, it becomes possible to suppress the occurrence of slip at the unstable behavior position D. Note that the information processing system 100 according to the present embodiment only needs to be able to determine the reproducibility of unstable behavior, and does not necessarily have to have a function of providing information to other target vehicles 2.

[0015] The target vehicle 2 is a vehicle that provides data to be processed by the information processing system 100. An ID [identification] (vehicle identification number) for identifying the vehicle is assigned to the target vehicle 2. There may be one target vehicle. The target vehicles 2 do not necessarily have the same configuration, and may have different vehicle types or the like. The target vehicle may be an autonomous driving vehicle, or may be a vehicle without an autonomous driving function.

[0016] Unstable behavior refers to sudden behavioral changes that make the driving of the target vehicle 2 unstable. Unstable behavior includes slips. Unstable behavior may include sudden deceleration or sudden steering angle changes. Unstable behavior may include the target vehicle 2 deviating from its lane, and may also include the target vehicle 2 approaching an object excessively (such as a collision warning). The object may include structures such as utility poles, guardrails, road signs, and walls, and may also include moving objects such as other vehicles, pedestrians, and bicycles.

[0017] The target vehicle data collected by the information processing system 100 includes the position information of the target vehicle 2. The position information is generated in association with time. The target vehicle data may include an ID. The target vehicle data may include the vehicle speed information of the target vehicle 2, may include acceleration information, may include steering angle information and yaw rate information. The target vehicle data may include detection information of surrounding objects by the sensors of the target vehicle 2, and may also include information on the driving position relative to the lane. The target vehicle data may include the driving operation information of the driver.

[0018] Furthermore, the target vehicle data may include the wiper operation information of the target vehicle 2. The target vehicle data may include road surface friction information calculated by the in-vehicle devices of the target vehicle 2, and may also include outside air temperature information detected by the temperature sensors of the target vehicle 2. The target vehicle data may include the captured images of the external cameras of the target vehicle 2. The various types of information described above are associated with the position information and time of the target vehicle 2.

[0019] [Configuration of Information Processing System] Hereinafter, the configuration of the information processing system 100 according to the present embodiment will be described. The information processing system 100 shown in FIG. 1 includes an information processing server 10. The information processing system 100 may include at least a part of the in-vehicle computing devices of the target vehicles 2A to 2Z.

[0020] The information processing server 10 is provided in a facility such as an information management center and is configured to be communicable with target vehicles 2A to 2Z. FIG. 3 is a block diagram showing an example of the configuration of the information processing server 10. The information processing server 10 shown in FIG. 3 is configured as a general computer including a processor 11, a storage unit 12, a communication unit 13, and a user interface 14.

[0021] The processor 11 operates, for example, an operating system to control the information processing server 10. The processor 11 is an arithmetic unit such as a CPU [Central Processing Unit] including a control device, an arithmetic device, a register, and the like. The processor 11 supervises the storage unit 12, the communication unit 13, and the user interface 14. The storage unit 12 is configured to include at least one of a memory and a storage. The memory is a recording medium such as a ROM [Read Only Memory] or a RAM [Random Access Memory]. The storage is a recording medium such as an HDD [Hard Disk Drive].

[0022] The communication unit 13 is communication equipment for performing communication via the network N. For the communication unit 13, a network device, a network controller, a network card, or the like can be used. The user interface 14 is a device including output devices such as a display and a speaker, and input devices such as a touch panel. Note that the information processing server 10 does not necessarily have to be provided in a facility and may be mounted on a moving body such as a vehicle or a ship. The information processing server 10 may be composed of a plurality of servers.

[0023] The information processing server 10 is connected to a target vehicle database 15 that stores target vehicle data of past target vehicles 2. The target vehicle database 15 has a storage device such as an HDD and can have the same configuration as a well-known database.

[0024] The target vehicle database 15 may store target vehicle data in association with a plurality of preset areas. The areas are set, for example, by dividing a certain range on a map. The areas may be set, for example, as 10 km meshes (10 km by 10 km), 5 km meshes, or 3 km meshes. They may also be set with meshes of 10 km or more. The areas do not have to be of the same shape and may be set as areas where the environment is likely to be uniform according to the terrain.

[0025] The areas may be set as mesh codes. The mesh codes are defined from latitude and longitude information, and unique codes are assigned to each mesh. When mesh codes are used for the areas, the target vehicle 2 and the information processing server 10 do not have to have map information. The position information of the target vehicle 2 can be obtained as latitude and longitude information from a GPS [Global Positioning System] or GNSS [Global Navigation Satellite System] mounted on the target vehicle 2. Eliminating the need for maps also contributes to cost reduction. Note that the target vehicle database 15 may be integrated with the information processing server 10 or may be provided in a facility separate from the information processing server 10.

[0026] Next, the functional configuration of the processor 11 will be described. As shown in FIG. 3, the processor 11 includes a target vehicle data recognition unit 11a, an unstable behavior position recognition unit 11b, a storage processing unit 11c, an environmental degradation scene determination unit 11d, and a reproducibility determination unit 11e.

[0027] The target vehicle data recognition unit 11a recognizes the target vehicle data transmitted from the target vehicle 2. The target vehicle data is as described above. The target vehicle data recognition unit 11a obtains the target vehicle data including the position information and time through communication with the target vehicle 2.

[0028] The unstable behavior position recognition unit 11b detects the unstable behavior of the target vehicle 2 based on the target vehicle data acquired by the target vehicle data recognition unit 11a. Hereinafter, among the plurality of target vehicles 2, the vehicle in which the unstable behavior is detected this time is used as the target vehicle 2A for explanation.

[0029] As the detection of slip, the unstable behavior position recognition unit 11b may use the operation start condition of a well-known antilock brake system [ABS: Antilock Brake System]. For example, in an antilock brake system, as an example, the wheel speed of each wheel is compared with the estimated vehicle body speed, and when a wheel that is considered to be locked is identified, it operates. The estimated vehicle body speed may be obtained from the wheel speeds of each wheel until slip occurs, or may be obtained from the change in acceleration until slip occurs.

[0030] Also, as the detection of slip, the unstable behavior position recognition unit 11b may use the operation start condition of a well-known vehicle stability control system [VSC: Vehicle Stability Control], or may use the operation start condition of a well-known traction control [TRC: Traction Control System]. The traction control can also be operated when a wheel that is spinning is identified by comparing the wheel speed of each wheel with the estimated vehicle body speed. The unstable behavior position recognition unit 11b may detect the slip of the target vehicle 2 by other well-known methods.

[0031] The unstable behavior position recognition unit 11b may detect a sudden deceleration as an unstable behavior based on the deceleration detected by the acceleration sensor. In this case, the unstable behavior position recognition unit 11b detects a sudden deceleration of the target vehicle 2 when, for example, the absolute value of the deceleration becomes equal to or greater than the sudden deceleration threshold value. The sudden deceleration threshold value is a threshold value of a preset value. Hereinafter, the threshold value used in the description means a threshold value of a preset value.

[0032] The unstable behavior position recognition unit 11b may detect a sudden steering angle change as an unstable behavior based on the yaw rate detected by the yaw rate sensor. In this case, for example, when the yaw rate becomes equal to or greater than the steering angle change threshold value, the unstable behavior position recognition unit 11b detects a sudden steering angle change of the target vehicle 2. Note that the tire slip angle or the steering angle may be used instead of the yaw rate.

[0033] When the unstable behavior position recognition unit 11b detects an unstable behavior of the target vehicle 2, the unstable behavior position recognition unit 11b recognizes the position information of the target vehicle 2 when the unstable behavior occurs as the unstable behavior position. The unstable behavior position recognition unit 11b recognizes the unstable behavior position in association with time.

[0034] The storage processing unit 11c stores the unstable behavior data including the unstable behavior position in the target vehicle database 15. The storage processing unit 11c stores the unstable behavior data as a part of the target vehicle data. The storage processing unit 11c may store the unstable behavior data in association with an area preset in the target vehicle database 15.

[0035] The environmental degradation scene determination unit 11d determines whether the situation in each area is an environmental degradation scene for each preset determination time based on the target vehicle data in a plurality of preset areas. The determination time is not particularly limited. The determination time may be 5 minutes, 10 minutes, or 15 minutes. The determination time may be a time of 5 minutes or less, or a time of 15 minutes or more.

[0036] One example of an assumed environmental degradation scene is a situation where the rainfall of rain is equal to or greater than a certain amount. The assumed environmental degradation scene may include any one of a situation where the wind speed is equal to or greater than a certain speed (for example, a storm situation), a situation where fog is present, and a situation where the humidity is equal to or greater than a certain value.

[0037] The environmental degradation scene determination unit 11d determines an environmental degradation scene by extracting feature quantities from the target vehicle data for each determination time in each area. Hereinafter, the area to be determined for the environmental degradation scene is referred to as a determination area. The environmental degradation scene determination unit 11d acquires and aggregates the target vehicle data necessary for the above determination from the target vehicle database 15.

[0038] Here, FIG. 4 is a diagram for explaining an example of an area for dividing target vehicle data. FIG. 4 shows four areas, area 5001 to area 5004. Each of the areas 5001 to 5004 is set on the map as an area of, for example, a 10 km mesh. Each of the areas 5001 to 5004 may be set as a mesh code. The information processing server 10 acquires target vehicle data from the target vehicle 2 traveling in each of the areas 5001 to 5004. In FIG. 4, a slip mark is shown for the target vehicle 2 in which slip has occurred. For example, within area 5001, slip has occurred in four target vehicles 2.

[0039] The feature quantities used for the determination of the environmental degradation scene include feature quantities related to unstable behavior and / or feature quantities related to environmental degradation determination factors. First, the determination of the environmental degradation scene using the feature quantities related to unstable behavior will be described.

[0040] The environmental degradation scene determination unit 11d extracts, for example, feature quantities related to unstable behavior from the unstable behavior data included in the target vehicle data. Feature quantities are extracted from the number of detections of unstable behavior (such as slip). Note that feature quantities may be extracted from the number of target vehicles 2 that have exhibited unstable behavior instead of the number of detections of unstable behavior.

[0041] As the feature quantities related to unstable behavior, at least one of the total number, duration, increase / decrease trend, average value, maximum value, range between the maximum value and the minimum value, top 5% point, etc. is adopted.

[0042] Specifically, the environmental degradation scene determination unit 11d calculates, for example, the total number of unstable behaviors in the determination area within the determination time from the unstable behavior data. The total number is the total number of times unstable behaviors such as slips are detected. When the total number is less than the total determination threshold, the environmental degradation scene determination unit 11d determines that the situation of the determination area at the determination time is not an environmental degradation scene.

[0043] The environmental degradation scene determination unit 11d may calculate the duration of the unstable behavior in the determination area within the determination time from the unstable behavior data. The duration is calculated as a larger value as the time during which a certain number or more of unstable behaviors are detected is longer, for example. When the duration is less than the duration determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0044] The environmental degradation scene determination unit 11d may calculate the average value of the unstable behavior in the determination area within the determination time from the unstable behavior data. The average value is calculated, for example, by dividing the total number by the determination time. When the average value is less than the average determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0045] The environmental degradation scene determination unit 11d may calculate the maximum value of the unstable behavior in the determination area within the determination time from the unstable behavior data. The maximum value is the maximum value among the number of detections of unstable behaviors within a certain time (for example, 1 second or 1 minute) during the determination time. When the maximum value is less than the maximum determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0046] The environmental degradation scene determination unit 11d may calculate the range of the unstable behavior in the determination area within the determination time from the unstable behavior data. The range is the difference between the maximum value and the minimum value. The minimum value is the minimum value among the detection numbers of the unstable behavior within the determination time for a certain period (for example, 1 second or 1 minute). When the range is less than the range determination threshold value, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0047] The environmental degradation scene determination unit 11d may calculate the top 5% point of the unstable behavior in the determination area within the determination time from the unstable behavior data. The top 5% point of the unstable behavior is the value that becomes the top 5% of the detection numbers of the unstable behavior for each certain period within the determination time. The certain period is not particularly limited. The certain period may be 5 seconds, may be 10 seconds, or may be 15 seconds. When the top 5% is less than the top determination threshold value, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene. Note that other values such as the top 10% point or the top 15% point may be used instead of the top 5% point.

[0048] The environmental degradation scene determination unit 11d may determine whether the unstable behavior in the determination area within the determination time from the unstable behavior data is in an increasing trend. The increasing trend is, for example, a state in which the detection number of the unstable behavior increases as it approaches the end from the start of the determination time. If it increases as a whole tendency, it may be determined as an increasing trend. Even when the unstable behavior is not in a maintaining trend or a decreasing trend, it may be determined as an increasing trend.

[0049] When it is determined that the unstable behavior is in an increasing trend, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene. In the present embodiment, based on the statistical finding that the reproducibility of the unstable behavior described later is low when environmental degradation such as the start of rain is in an increasing trend, even if the environment has deteriorated, if it is in an increasing trend, it is determined that it is not an environmental degradation scene. Note that it is not always necessary to perform the determination of the increasing trend.

[0050] The environmental degradation scene determination unit 11d may allow the determination result of the increasing trend to affect the determination of the next environmental degradation scene. For example, when it is determined that the unstable behavior is on an increasing trend in one area, the environmental degradation scene determination unit 11d may adjust various thresholds so that it is easier to determine that it is an environmental degradation scene at the next determination time in the same area. The environmental degradation scene determination unit 11d may add at least one of the total determination threshold, continuous determination threshold, average determination threshold, maximum determination threshold, range determination threshold, and upper determination threshold by a certain value.

[0051] Note that based on the above findings, the environmental degradation scene determination unit 11d may also adjust various thresholds so that it is easier to determine that it is an environmental degradation scene at the next determination time in the same area even when the determination result shows a decreasing trend. The decreasing trend means, for example, that the number of detections of unstable behavior decreases as the determination time approaches the end from the start. If it shows a decreasing trend as a whole, it may be determined as a decreasing trend. The environmental degradation scene determination unit 11d may add at least one of the total determination threshold, continuous determination threshold, average determination threshold, maximum determination threshold, range determination threshold, and upper determination threshold by a certain value. The environmental degradation scene determination unit 11d may set the addition amount when it is determined to be a decreasing trend to a smaller value compared to the case when it is determined to be an increasing trend.

[0052] Next, the determination using the feature quantity related to the environmental degradation determination factor will be described. The environmental degradation determination factor is a factor related to the degradation of the driving environment of the target vehicle 2. The environmental degradation determination factor may include at least one of the wiper operation ratio, low μ ratio, outside air temperature, and camera image (image such as rain). As the feature quantity, at least one of the total number, duration, average value, maximum value, range between the maximum value and the minimum value, upper 5% point, increasing and decreasing trend, etc. is adopted.

[0053] Hereinafter, the determination of the environmental degradation scene using the environmental degradation determination factor will be described by taking the wiper operation ratio as a representative example. The environmental degradation scene determination unit 11d calculates the wiper operation ratio of the determination area within the determination time as the environmental degradation determination factor from the target vehicle data. The wiper operation ratio is the ratio of the wiper operation time of the target vehicle 2 staying in the determination area within a certain time. The wiper operation ratio may also be the ratio of the target vehicle 2 that has operated the wiper at least once among the target vehicles 2 staying in the determination area within a certain time. The certain time is, for example, a time shorter than the determination time. The certain time may be 1 minute, may be 30 seconds, may be 15 seconds. The certain time may be the same as the determination time.

[0054] The environmental degradation scene determination unit 11d calculates, for example, the total number of the wiper operation ratios of the determination area within the determination time as the feature amount of the environmental degradation determination factor. The total number is, for example, the value obtained by summing up the wiper operation ratios for each certain time for the determination time. When the total number is less than the total determination threshold, the environmental degradation scene determination unit 11d determines that the situation of the determination area at the determination time is not an environmental degradation scene.

[0055] The environmental degradation scene determination unit 11d may calculate the continuity of the wiper operation ratio of the determination area within the determination time. The continuity is calculated, for example, as a larger value as the time during which the wiper operation ratio is equal to or greater than a certain number is longer. When the continuity is less than the continuity determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0056] The environmental degradation scene determination unit 11d may calculate the average value of the wiper operation ratio of the determination area within the determination time. The average value is calculated, for example, by dividing the total number by the determination time. When the average value is less than the average determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation of the determination area at the determination time is an environmental degradation scene.

[0057] The environmental degradation scene determination unit 11d may calculate the maximum value of the wiper operation ratio in the determination area within the determination time. The maximum value is the value that is the largest among the wiper operation ratios calculated at regular intervals within the determination time. If the maximum value is less than the maximum determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation in the determination area at the determination time is an environmental degradation scene.

[0058] The environmental degradation scene determination unit 11d may calculate the range of the wiper operation ratio in the determination area within the determination time. The range is the difference between the maximum value and the minimum value. The minimum value is the value that is the smallest among the wiper operation ratios calculated at regular intervals within the determination time. If the range is less than the range determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation in the determination area at the determination time is an environmental degradation scene.

[0059] The environmental degradation scene determination unit 11d may calculate the top 5% point of the wiper operation ratio in the determination area within the determination time. The top 5% point is the value that is in the top 5% of the wiper operation ratios for each fixed time within the determination time. If the top 5% is less than the determination threshold, the environmental degradation scene determination unit 11d may not determine that the situation in the determination area at the determination time is an environmental degradation scene. Note that other values such as the top 10% point or the top 15% point may be used instead of the top 5% point.

[0060] The environmental degradation scene determination unit 11d may determine whether the wiper operation ratio in the determination area within the determination time is on an increasing trend. The increasing trend is, for example, a state where the wiper operation ratio increases as it approaches the end from the start of the determination time. If the wiper operation ratio is not on a maintaining trend or a decreasing trend, it may be determined to be on an increasing trend. If the environmental degradation scene determination unit 11d determines that the wiper operation ratio is on an increasing trend, it may not determine that the situation in the determination area at the determination time is an environmental degradation scene.

[0061] The environmental degradation scene determination unit 11d may allow the determination result of the increasing trend to affect the determination of the next environmental degradation scene. For example, when it is determined that the wiper operation ratio has an increasing trend in one area, the environmental degradation scene determination unit 11d may adjust various threshold values so that it is easier to determine that it is an environmental degradation scene at the next determination time in the same area. The environmental degradation scene determination unit 11d may add at least one of the total determination threshold value, the continuous determination threshold value, the average determination threshold value, the maximum determination threshold value, the range determination threshold value, and the upper determination threshold value by a certain value.

[0062] Note that based on the above findings, the environmental degradation scene determination unit 11d may also adjust various threshold values so that it is easier to determine that it is an environmental degradation scene at the next determination time in the same area even when the determination result is a decreasing trend. The decreasing trend is, for example, a state in which the detected number of wiper operation ratios decreases as it approaches the end from the start of the determination time. If it is decreasing as a whole trend, it may be determined as a decreasing trend. The environmental degradation scene determination unit 11d may add at least one of the total determination threshold value, the continuous determination threshold value, the average determination threshold value, the maximum determination threshold value, the range determination threshold value, and the upper determination threshold value by a certain value. The environmental degradation scene determination unit 11d may set the addition amount when it is determined to be a decreasing trend to a smaller value compared to the case when it is determined to be an increasing trend.

[0063] The environmental deterioration scene determination unit 11d may use the wiper operation mesh ratio instead of the wiper operation ratio. The wiper operation mesh ratio is obtained by dividing the determination area into a plurality of divided meshes. When the determination area is 10 km square, the divided mesh can be, for example, 1 km square. The wiper operation mesh ratio is calculated, for example, with the number of divided meshes traveled by the target vehicle 2 within a certain time as the denominator and the number of divided meshes in which the target vehicle 2 operated the wiper within a certain time as the numerator. The divided meshes counted in the numerator may be limited to the divided meshes traveled by the target vehicle 2 when the wiper operation time is equal to or longer than a certain value. The environmental deterioration scene determination unit 11d may use the number of wiper operations instead of the wiper operation ratio. The number of wiper operations is, for example, the number of records in which the wiper of the target vehicle 2 operated within the determination time in the determination area.

[0064] The environmental deterioration scene determination unit 11d may use the low μ ratio as a factor for determining environmental deterioration. The low μ ratio is, for example, the ratio of the time when the road surface friction in the determination area is recognized as less than a certain value for each certain time. The low μ ratio may be calculated with the number of target vehicles 2 traveling within the determination area for each certain time as the denominator and the number of target vehicles 2 for which the road surface friction is recognized as less than a certain value as the numerator. The environmental deterioration scene determination unit 11d may determine the environmental deterioration scene using at least one of the total number, continuity, average value, maximum value, range of the maximum value and the minimum value, upper 5% point, and increase / decrease tendency of the low μ ratio in the same manner as the wiper operation ratio.

[0065] The environmental deterioration scene determination unit 11d may use the outside air temperature as a factor for determining environmental deterioration. The outside air temperature is, for example, the values detected by the target vehicles 2 in the determination area for each certain time and aggregated. The environmental deterioration scene determination unit 11d may determine the environmental deterioration scene using at least one of the total number, continuity, average value, maximum value, range of the maximum value and the minimum value, upper 5% point, and increase / decrease tendency of the low μ ratio in the same manner as the wiper operation ratio.

[0066] The environmental degradation scene determination unit 11d may use the camera image as a factor for determining environmental degradation. When the environmental degradation scene determination unit 11d performs image recognition of environmental degradation such as heavy rain from the camera image of the target vehicle 2 within the determination area at the determination time, various thresholds may be changed so as to easily determine that it is an environmental degradation scene.

[0067] The environmental degradation scene determination unit 11d stores, for example, the determination result of the environmental degradation scene in the target vehicle database 15. The determination result of the environmental degradation scene may be stored in a database different from the target vehicle database 15.

[0068] When the instability behavior position recognition unit 11b detects the instability behavior of the target vehicle 2A (one of the target vehicles 2), the reproducibility determination unit 11e determines whether there is reproducibility in the instability behavior of the target vehicle 2A based on the determination result of the environmental degradation scene determination unit 11d. Hereinafter, the area where the target vehicle 2A is traveling at the time of detecting the instability behavior is referred to as the target area. Note that the reproducibility determination unit 11e may collectively execute the reproducibility determination of the instability behavior of a plurality of target vehicles 2 in one process.

[0069] When it is determined that the situation of the target area (the area where the target vehicle 2A is traveling) at the time of detecting the instability behavior is an environmental degradation scene, the reproducibility determination unit 11e determines that there is reproducibility in the instability behavior (determines it as a positive example). The reproducibility determination unit 11e stores, for example, data related to the instability behavior with reproducibility in the target vehicle database 15 or another database.

[0070] When it is not determined that the situation of the target area at the time of detecting the instability behavior is an environmental degradation scene, the reproducibility determination unit 11e determines that there is no reproducibility in the instability behavior (determines it as a negative example). The reproducibility determination unit 11e does not store, for example, the instability behavior data without reproducibility in the database. Note that the reproducibility determination unit 11e may store all the instability behavior data in the target vehicle database 15 or another database in association with, for example, the determination result of reproducibility.

[0071] [Processing of the Information Processing System] Next, the processing of the information processing system 100 according to the present embodiment will be described with reference to the drawings. FIG. 5 is a flowchart showing an example of the environmental degradation scene determination process of the information processing system 100. The information processing system 100 determines the environmental degradation scene of each area (each determination area) separately for each determination time.

[0072] As shown in FIG. 5, the information processing server 10 of the information processing system 100, as S10, aggregates the target vehicle data of the determination area at the determination time by the environmental degradation scene determination unit 11d. The environmental degradation scene determination unit 11d performs the aggregation by acquiring the target vehicle data from the target vehicle database 15. Then, the information processing server 10 proceeds to S11.

[0073] In S11, the information processing server 10 calculates the feature amount from the target vehicle data by the environmental degradation scene determination unit 11d. The environmental degradation scene determination unit 11d calculates, for example, the total number and the continuance as the feature amounts of the environmental degradation determination factors. Then, the information processing server 10 proceeds to S12.

[0074] In S12, the information processing server 10 determines whether or not the total number of the environmental degradation determination factors is equal to or greater than the total determination threshold by the environmental degradation scene determination unit 11d. If it is determined that the total number of the environmental degradation determination factors is equal to or greater than the total determination threshold (S12: YES), the information processing server 10 proceeds to S13. If it is not determined that the total number of the environmental degradation determination factors is equal to or greater than the total determination threshold (S12: NO), the information processing server 10 proceeds to S16.

[0075] In S13, the information processing server 10 determines whether or not the continuance of the environmental degradation determination factors is equal to or greater than the continuance determination threshold by the environmental degradation scene determination unit 11d. If it is determined that the continuance of the environmental degradation determination factors is equal to or greater than the continuance determination threshold (S13: YES), the information processing server 10 proceeds to S14. If it is not determined that the continuance of the environmental degradation determination factors is equal to or greater than the continuance determination threshold (S13: NO), the information processing server 10 proceeds to S16.

[0076] In S14, the information processing server 10 determines whether the environmental degradation determination factors are on an increasing trend by the environmental degradation scene determination unit 11d. If the information processing server 10 determines that the environmental degradation determination factors are on an increasing trend (S14: YES), it proceeds to S16. If the information processing server 10 does not determine that the environmental degradation determination factors are on an increasing trend (S14: NO), it proceeds to S15. That is, if the environmental degradation determination factors are on an increasing trend, it is not determined that it is an environmental degradation scene in the present embodiment.

[0077] In S15, the information processing server 10 determines by the environmental degradation scene determination unit 11d that the situation of the determination area at the determination time is an environmental degradation scene (scene determination step). Then, the information processing server 10 ends the environmental degradation scene determination process.

[0078] In S16, the information processing server 10 determines by the environmental degradation scene determination unit 11d that the situation of the determination area at the determination time is not an environmental degradation scene. Then, the information processing server 10 ends the environmental degradation scene determination process.

[0079] FIG. 6 is a flowchart showing an example of the reproducibility determination process of the information processing system 100.

[0080] As shown in FIG. 6, the information processing server 10 of the information processing system 100 determines in S20 whether a new unstable behavior has been detected by the unstable behavior position recognition unit 11b. If the information processing server 10 detects an unstable behavior (S20: YES), it proceeds to S21. If the information processing server 10 does not detect an unstable behavior (S20: NO), it ends the current reproducibility determination process.

[0081] In S21, the information processing server 10 determines, by means of the reproducibility determination unit 11e, whether the situation of the target area at the time of detecting unstable behavior is an environmental degradation scene. When the information processing server 10 determines that the situation of the target area at the time of detecting unstable behavior is an environmental degradation scene (S21: YES), it proceeds to S22. When the information processing server 10 does not determine that the situation of the target area at the time of detecting unstable behavior is an environmental degradation scene (S21: NO), it proceeds to S23.

[0082] In S22, the information processing server 10 determines, by means of the reproducibility determination unit 11e, that there is reproducibility in the current unstable behavior (reproducibility determination step). Then, the information processing server 10 ends the current reproducibility determination process.

[0083] In S23, the information processing server 10 determines, by means of the reproducibility determination unit 11e, that there is no reproducibility in the current unstable behavior. Then, the information processing server 10 ends the current reproducibility determination process.

[0084] According to the information processing system 100 and its processing method according to the present embodiment described above, since it is considered that the vehicle's surrounding environment greatly affects the reproducibility of unstable behavior, by determining whether the situation of the target area at the time of detecting the unstable behavior is an environmental degradation scene, when it is determined that the situation of the target area is an environmental degradation scene, it can be determined that there is reproducibility in the unstable behavior.

[0085] Also, according to the information processing system 100, by calculating the total number of environmental degradation determination factors in the determination area of the determination time, and when the total number is less than the total determination threshold, by not determining that the situation of the target area is an environmental degradation scene, it is possible to avoid erroneously determining an area with few environmental degradation determination factors as an environmental degradation scene.

[0086] Also, according to the information processing system 100, the persistence of the environmental degradation determining factor in the determination area of the determination time is calculated. When the persistence is less than the persistence determination threshold, it is possible to avoid determining that the situation in the target area is an environmental degradation scene, thereby avoiding determining a temporary and non-reproducible environmental degradation as an environmental degradation scene and determining that there is reproducibility in the unstable behavior.

[0087] Furthermore, according to the information processing system 100, when it is determined that the environmental degradation determining factor has an increasing trend, it is not determined that the situation in the target area is an environmental degradation scene. The inventor has found from statistics that it is difficult to reproduce the unstable behavior of the target vehicle 2 when environmental degradation is progressing, such as when it starts to rain. On the other hand, unstable behavior is likely to be reproduced when environmental degradation is maintaining or decreasing. Therefore, in the information processing system 100, when it is determined that the environmental degradation determining factor has an increasing trend, it is possible to avoid determining that there is reproducibility in the unstable behavior with low reproducibility by not determining that the situation in the target area is an environmental degradation scene.

[0088] As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments. The present invention can be implemented in various forms with various changes and improvements based on the knowledge of those skilled in the art, including the above-described embodiments.

Description of Reference Numerals

[0089] 2... Target vehicle, 10... Information processing server, 11a... Target vehicle data recognition unit, 11b... Unstable behavior position recognition unit, 11c... Storage processing unit, 11d... Environmental degradation scene determination unit, 11e... Reproducibility determination unit, 15... Target vehicle database, 100... Information processing system, 5001~5004... Areas.

Claims

1. An information processing system that stores target vehicle data including information on the positions and driving of a plurality of target vehicles, and determines whether there is reproducibility in an unstable behavior that is a sudden behavior change of the target vehicle. The information processing system includes: An environmental degradation scene determination unit that determines whether the situation of each area is an environmental degradation scene at each preset determination time based on the target vehicle data in a plurality of preset areas; A reproducibility determination unit that determines that there is reproducibility in the unstable behavior when it is determined that the situation of a target area, which is the area where the target vehicle is traveling at the time of detection of the unstable behavior, is an environmental degradation scene; Comprising: The environmental degradation scene determination unit calculates the total number of environmental degradation determination factors in the area within the determination time from the target vehicle data, and determines whether the environmental degradation determination factors in the area within the determination time are on an increasing trend. When the total number of unstable behaviors in the area within the determination time is equal to or greater than a first total determination threshold, and the total number of the environmental degradation determination factors in the area within the determination time is equal to or greater than a second total determination threshold, and the environmental degradation determination factors within the determination time are not on an increasing trend, it is determined that the situation of the area at the determination time is the environmental degradation scene. When the total number of unstable behaviors in the area within the determination time is less than the first total determination threshold, or the total number of the environmental degradation determination factors in the area within the determination time is less than the second total determination threshold, or the environmental degradation determination factors within the determination time are on an increasing trend, it is not determined that the situation of the area at the determination time is the environmental degradation scene. The environmental degradation determination factors include at least a wiper operation ratio that is the ratio of the target vehicles that have operated the wiper at least once among the target vehicles staying in the area for a certain period of time. An information processing system.

2. The environmental degradation scene determination unit calculates the duration of the environmental degradation determination factors in the area within the determination time from the target vehicle data, and when the duration is less than a duration determination threshold, it is not determined that the situation of the area at the determination time is the environmental degradation scene. The information processing system according to Claim 1.

3. A processing method of an information processing system that stores target vehicle data including information on the positions and driving of a plurality of target vehicles, and determines whether there is reproducibility in the unstable behavior, which is a sudden behavior change of the target vehicle, when detecting the unstable behavior, comprising: A scene determination step of determining whether the situation of each area is an environmental deterioration scene for each preset determination time based on the target vehicle data in a plurality of preset areas; A reproducibility determination step of determining that there is reproducibility in the unstable behavior when it is determined that the situation of the target area, which is the area where the target vehicle is traveling at the time of detection of the unstable behavior, is an environmental deterioration scene; including; In the scene determination step, the total number of environmental deterioration determination factors in the area within the determination time is calculated from the target vehicle data, and it is determined whether the environmental deterioration determination factors in the area within the determination time tend to increase, When the total number of unstable behaviors in the area within the determination time is equal to or greater than a first total determination threshold, and the total number of the environmental deterioration determination factors in the area within the determination time is equal to or greater than a second total determination threshold, and the environmental deterioration determination factors within the determination time do not tend to increase, it is determined that the situation of the area at the determination time is the environmental deterioration scene; When the total number of unstable behaviors in the area within the determination time is less than the first total determination threshold, or the total number of the environmental deterioration determination factors in the area within the determination time is less than the second total determination threshold, or the environmental deterioration determination factors within the determination time tend to increase, it is not determined that the situation of the area at the determination time is the environmental deterioration scene; The environmental deterioration determination factors include at least the wiper operation ratio, which is the ratio of the target vehicles that have operated the wiper at least once among the target vehicles staying in the area for a certain period of time, a processing method of an information processing system.

Images