JP5362225B2 - Operation recording device and operation status recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology which enables a transportation business firm or the like to effectively conduct safe driving and avoid danger. <P>SOLUTION: The CPU 51 of an operation-recording device 50 monitors G values, which an acceleration sensor 63 detects, and determines whether the G values are a reference G value or smaller. If a detected G value exceeds the reference G value, the CPU 51 conducts a counter danger operation. The operation-recording device 50 acquires traffic information from public DSRC road-side machines 20 and changes the reference G value, according to the contents of the traffic information. The operation-recording device 50 operates a timer to change the reference G value and then puts the reference G value back to a standard value, after a prescribed period of time. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an operation recording device and an operation status recording method for receiving traffic information and the like from a transmission facility such as a roadside belt and recording a vehicle operation state or notifying a driver of a danger based on the traffic information.

  Conventionally, in the transportation business of taxis, buses, trucks, etc., in order to encourage the driver to drive safely and prevent accidents, an operation recording device called a drive recorder has been installed in the vehicle of the operator.

  When the vehicle enters a predetermined running state, for example, when the vehicle exceeds a predetermined speed or exceeds a predetermined engine rotation speed, the operation recording device notifies the driver of an alarm and records it on the recording medium. Record the vehicle status, driver's operation, etc. as danger notification information. Further, the front of the vehicle is photographed by a camera mounted on the vehicle, and when an accident occurs, an impact acting on the vehicle is detected and an image immediately before the impact is stored. Based on the danger notification information and video, the business operators are used to prevent accidents and investigate the causes of accidents by providing instructions on safe driving to drivers and analyzing accidents.

  Furthermore, there is a technique for changing the recording time of an image before and after the collision accident according to the magnitude of the impact in order to more accurately grasp the cause of the accident when the accident occurs (for example, patents) Reference 1). With this technique, imaging information can be recorded without waste, so that it is possible to prevent an important part from being recorded due to insufficient recording capacity.

  In addition, in order to prevent accidents, there is a technique for acquiring the vehicle progress state as an image and detecting the lateral position of the vehicle in the lane to prevent lane departure and meandering (for example, Patent Document 2).

In addition, on a road for exclusive use of automobiles, a road information in front of a lane from a roadside machine, for example, traffic jam information in front of a curve with poor visibility and accident occurrence point information are obtained from a vehicle VICS ( registered trademark; Vehicle Information and Communication System) device (or navigation device). ), And a technology to call attention to the driver has been put into practical use.

  Furthermore, in order to actively monitor a running vehicle, there is a technique in which an operation monitoring device connected to a roadside device monitors the running state of an automobile (for example, see Patent Document 3). In this technology, a predetermined device on the vehicle side detects an overspeed state called special operation information and a drowsy driving state, and warns the driver and notifies the operation monitoring device. The operation monitoring device records the special operation information and position information in association with each other.

JP 2006-321424 A JP 2000-276697 A JP 2003-48447 A

  By the way, there is still a strong demand for safety measures as described above. In particular, the demands on service operators are very strict, penalties for violating safe operation are strengthened, and the company is required to appropriately manage safe operation. Therefore, by using the function of the drive recorder as shown in Patent Document 1, in a place that is assumed to be dangerous, a warning is issued in advance to alert the driver, and the driver's operation or the like is recorded for later safety. We are working to prevent accidents by using it for guidance.

  The above-described drive recorder has a function of issuing a warning to a user by a predetermined operation when a predetermined acceleration or speed is reached. However, a value that triggers the operation, that is, a threshold value (reference value) is fixed. In the technology disclosed in Patent Document 3, a roadside machine (server) and a vehicle transmit traffic information and driving information by two-way communication, and change a threshold value. The traffic information transmitted to the server and the received driving information are recorded.

  However, in this technology, since the roadside device and the vehicle-side device perform two-way communication, there is a problem that it is expensive to install if this function is installed. In particular, truck operators and the like have a problem in that they do not always have sufficient investment capacity, and the technology is not used. In addition, the operator has to acquire driving information and traffic information from the server side for safety guidance, and a system administrator may be required to acquire the information via the Internet line or the like. Further, in the form of separately obtaining data on a recording medium, there is a problem that safe driving guidance cannot be performed at an appropriate timing.

  This invention is made | formed in view of such a condition, and it aims at providing the technique which improves the safe driving | running | working of a vehicle.

One embodiment of the present invention relates to an operation recording device. This operation recording device is mounted on a vehicle, records the operation state of the vehicle, and determines that a danger has occurred when the vehicle enters a predetermined state, and notifies the driver of the fact. An external information acquisition unit for acquiring predetermined information transmitted to the vehicle from the outside, and a reference changing unit for changing a reference for determining that a danger has occurred based on the predetermined information; , And the predetermined information is information of a first category indicating what kind of information, and information that the driver should be aware of in relation to the information of the first category And the criterion changing means determines that a risk has occurred after grouping the first category and the second category into a matrix, respectively. It has a table in which criteria because have been described, when acquiring the traffic information, as well as changing the criteria by referring to the table, to the notification to the driver on the basis of the predetermined information If the notification should include information that can be identified with the reference information for determining that the danger classified in the matrix has occurred, The standard is changed to reflect possible information .
Further, an initial reference setting unit that changes an initial value of a reference to be changed based on the predetermined information may be provided.
The reference changing means may return the reference to the reference before the change when a predetermined time has elapsed after the change of the reference.
The predetermined information may be traffic information transmitted by DSRC (Dedicated Short Range Communication).
Further, the predetermined information may be information related to a predetermined facility transmitted by DSRC.
Further, the external information acquisition means and the recording means for recording the operation state of the vehicle may be configured separately in different devices.
Another aspect of the present invention relates to an operation status recording method. This operation status recording method includes an information acquisition step of acquiring traffic information from a predetermined external communication device using DSRC, and a reference value for determining that a danger has occurred according to the acquired traffic information. A reference changing step for changing, a danger detecting step for judging that a danger has occurred in the running of the vehicle when the running state of the vehicle becomes a predetermined state with respect to the reference value, and a fact that the danger has occurred A danger notification step for notifying the driver, an operation recording step for recording the state of operation of the vehicle, the occurrence of the danger and the reference value in association with each other, and the traffic information is any kind of information Including information on a first category indicating whether there is information, and information on a second category indicating how the driver should be concerned in relation to the information on the first category, The change process is When the traffic information is acquired, the first category and the second category are grouped and classified into a matrix, and then a table describing criteria for determining that a risk has occurred is referred to. When the notification is made to the driver based on the predetermined information, the notification is for determining that the danger classified in the matrix has occurred. When it should be determined that information that can be identified with the reference information is included, the reference is changed to reflect the information that can be identified .

  According to the present invention, since the threshold value for determining the danger is changed in accordance with the surrounding environment of the vehicle, the safe operation of the vehicle can be improved.

In the best mode for carrying out the invention (hereinafter simply referred to as “embodiment”), a warning related to safe driving is performed using an operation recording device (also referred to as “drive recorder”) mounted on a vehicle. In general, an operation recording device is equipped with an acceleration sensor (also referred to as a “G sensor”), and detects an impact applied to the vehicle or a rapid speed change as a gravitational acceleration (“G value”). Recognize that an accident or danger has occurred when the value is greater than or equal to the specified value. 1G corresponds to the gravitational acceleration of the earth (about 9.8 m / s ² ). Then, the camera provided in the operation recording device saves the video from a predetermined time before the danger is recognized. Further, the operation recording device continuously records the driver's operation and the G value. In the present embodiment, the operation of recording a video recording by the camera, the operation of the driver, the speed of the vehicle, and the like is collectively referred to as “operation at the time of danger” when a predetermined G value acts and is determined to be dangerous. In the present embodiment, traffic information is acquired from the roadside machine, and danger information (such as accident-prone area information and a high possibility of side-view driving) around the current location is warned to the driver. Furthermore, the threshold value of each parameter for determining whether or not to give the warning is changed according to the driving situation. Hereinafter, in the present embodiment, a case where the G value detected by the operation recording device is mainly used as the parameter will be described as a representative form.

<First Embodiment>
FIG. 1 is a diagram illustrating a schematic configuration of an operation support system 10 according to the present embodiment. FIG. 2 is a functional block diagram of the operation support system 10.

As shown in the figure, the operation support system 10 includes an operation recording device 50 and a DSRC onboard device 30 mounted on a vehicle 90, a public DSRC roadside device 20 installed on the roadside of the road, and a network 13 connected to the public DSRC roadside device 20. Connected via ITS (Intelligent
Transport Systems) server 12. Here, the DSRC in-vehicle device 30 and the operation recording device 50 are separately configured, but may be configured integrally, and all or a part of the configuration is incorporated in other devices such as a navigation system. May be.

  The ITS server 12 is installed in an information center that manages so-called road conditions, and communicates with the DSRC on-vehicle device 30 of the vehicle by DSRC using a public DSRC roadside device 20 installed on the roadside. By this communication, the ITS server 12 provides traffic information such as traffic jam information and regulation information (speed regulation, travel restriction, etc.) to the vehicle 90, provides a predetermined service to the vehicle 90, Predetermined information and requests are acquired from 90. Here, the traffic information includes not only information related to roads such as traffic jam information and regulation information, but also information useful when operating vehicles such as weather information.

  The public DSRC roadside machine 20 includes an information transmission control unit 22, a vehicle presence / absence determination unit 23, a transmission signal generation unit 24, and a radio unit 25. The public DSRC roadside machine 20 has the configuration and functions of a general DSRC roadside machine, and will be briefly described here. Further, the facility DSRC roadside machine 70 and the office DSRC roadside machine 80, which will be described later, also have the same configuration and function, and a description thereof will be omitted.

  The information transmission control unit 22 acquires traffic information and the like to be transmitted from the ITS server 12 to the DSRC on-board unit 30 of the vehicle 90 and outputs the vehicle information acquired from the DSRC on-board unit 30 to the ITS server 12. In order to execute such an operation, the information transmission control unit 22 includes a CPU 27, an information collection unit 28, and a memory 26, and executes an application for each process.

  The vehicle presence / absence determination unit 23 determines whether or not the vehicle 90 exists in the communication area of the public DSRC roadside machine 20. As a characteristic of DSRC, the communicable distance is as short as several meters to several hundred meters, but high-speed communication within a specific area can be performed by deliberately reducing the usable range. The vehicle presence / absence determining unit 23 determines whether or not the vehicle 90 exists in this specific area. The presence or absence of the vehicle 90 may be detected by a sensor installed on the road side.

  The transmission signal generation unit 24 converts information to be transmitted to the DSRC in-vehicle device 30 into a predetermined communication format, and generates a desired signal. As information to be transmitted, for example, when the public DSRC roadside machine 20 is installed on a general road, there is traffic information around or near the installation location. As a specific example of the traffic information, there is information such as “(1) Accident frequent occurrence zone, (2) Including relevant information of right turn accident” in front of the road. In addition, what kind of information is used by the DSRC in-vehicle device 30 will be described in a specific example described later.

  The wireless unit 25 transmits and receives signals to and from the DSRC on-vehicle device 30 (wireless unit 32).

  The DSRC vehicle-mounted device 30 includes a CPU 31, a wireless unit 32, an HMI (Human Machine Interface) 33, a memory 34, and an I / F 35.

  The CPU 31 and the memory 34 execute various applications. The HMI 33 is an output device such as a speaker, LED, or LCD. The radio unit 32 acquires traffic information from the public DSRC roadside machine 20. Further, the CPU 31 and the memory 34 appropriately notify the acquired traffic information from the HMI 33 to the driver. This notification may be notified by the HMI 53 of the operation recording device 50 described later, may be notified by both HMIs 33 and 53, and further, the HMI of another device to which the DSRC in-vehicle device 30 is connected. (Display device or speaker; not shown) may be notified.

  The I / F 35 is connected to the I / F 52 of the operation recording device 50 with a cable or the like, and performs one-way or two-way communication. That is, the application executed by the CPU 31 communicates with the operation recording device 50 via the I / F 35. As a characteristic feature of the present embodiment, information that triggers an operation in danger of the operation recording device 50 is transmitted from the I / F 35 to the operation recording device 50. More specifically, information for changing the G value, which is a threshold value that is referred to when the operation recording device 50 determines whether to start the dangerous operation, is transmitted. Hereinafter, the G value referred to when the operation recording device 50 determines the operation at the time of danger is referred to as “reference G value”.

  Here, the traffic information notified from the DSRC vehicle-mounted device 30 to the operation recording device 50 will be described. FIG. 3 shows a table (also referred to as a “G value table”) showing reference G values to be set according to traffic information, and this table is recorded in the ROM 55 described later. The content of the traffic information is, for example, the content of “traffic information: frequent occurrence points of accidents, including information related to right turn accidents”. Here, for the sake of convenience, the first content of the traffic information is classified into the first category and the latter content is classified into the second category. The first category indicates what kind of information the traffic information is. For example, “accident frequent occurrence zone” “congestion information” “information shower” “parking lot” “settlement 1” “settlement 2”. As the second category, information that should be noted by the driver in relation to the information of the first category is shown. For example, “Right turn accident”, “Rear-end collision accident”, “Wakimi”, “Steep curve”, etc.

  And FIG. 4 is a figure which shows the table | surface shown after classifying into the 1st and 2nd category about the content of traffic information. As shown in the content correspondence symbol table of FIG. 4A, each piece of information in the first category is classified into several groups and given a predetermined symbol. For example, “accident frequent occurrence point” is group “B”, and the traffic jam information is group “C”. Similarly, as shown in the rank table (risk degree table) in FIG. 4B, each piece of information in the second category is also classified into several groups and given predetermined symbols. For example, “Right turn accident” is group “c” and “Wakimi” is group “d”. The groups here are classified according to the risk level indicated by the information. That is, those having the same group symbol show the same degree of risk.

  Then, as shown in FIG. 3, a matrix-like table having a first category in the horizontal direction and a second category in the vertical direction is formed, and the number specified in the table is a risk occurrence or danger in the operation recording device 50. This is a threshold value when determining that the possibility is high. Here, the reference G value is shown, and when the G value (impact etc.) exceeding the reference G value acts on the operation recording device 50, the operation recording device 50 determines that it is dangerous and executes the operation at the time of danger. To do.

  For example, if the first category includes information on “Accident frequent occurrence point” (symbol “B”) and the second category includes “right turn accident” (symbol “c”), the G value table of FIG. The determined reference G value is “2”. When the standard reference G value is “3”, the recording device 50 originally operates in danger when an impact exceeding 3 G is applied. Operates in danger with an impact exceeding. When the first category is “congestion information” (symbol “C”) and the second category is “rear-end collision” (symbol “c”), the reference G value determined in the G-value table is “5”. Become. In addition, although G value which acts on the operation recording apparatus 50 was utilized here as a threshold value judged to be dangerous, it is not the meaning limited to this. In addition, for example, the speed of the vehicle 90, the acceleration calculated from the speed, the operation amount of the driver with respect to the steering wheel, and the like, and those values (including the G value) appropriately combined may be used. Further, since the operation recording device 50 includes the camera 59 and captures the front of the vehicle as will be described later, the inter-vehicle distance may be calculated based on the captured image and the risk may be determined based on the inter-vehicle distance. . Naturally, if a distance sensor or the like that detects the inter-vehicle distance is mounted, the inter-vehicle distance detected by the sensor may be used.

  Further, depending on the traffic information, there is a case where only the information of the first category is present and there is no information of the second category. In preparation for such a case, the G value table shown in FIG. 3 describes G values corresponding to information without the second category. Furthermore, depending on the type of information, there is a possibility that the risk level cannot be set appropriately in the above classification. For example, assume that the first category is “traffic shower” and the second category is “snow cover” as traffic information. In this case, the snow cover information is displayed on the monitor. At this time, the driver may move the line of sight to the monitor. At this time, there is a possibility that the same situation as “Wakimi” may occur, and even when “Wakimi” information is not included, it is preferable to perform the same processing as when “Wakimi” information is included. . Therefore, when the monitor display is accompanied when only the audio is output or when it is not output, the reference G value is set to the reference G value when “Wakimi” is included, or the reference G value is lowered by a predetermined level.

  Next, the operation recording device 50 will be described. The operation recording device 50 includes a CPU 51, an I / F 52, an HMI 53, a memory 54, a ROM 55, a clock 56, a card insertion unit 57, a camera 59, and a sensor unit 60.

  The CPU 51 performs calculations for realizing each function of the operation recording device 50 based on programs stored in the ROM 55, recorded data, data acquired from the I / F 52, control signals, and the like. Data acquired from the I / F 52 is recorded in the memory 54 temporarily or only for a predetermined period. The I / F 52 has the same function as the I / F 35 of the DSRC on-vehicle device 30. The HMI 53 also has the same function as the HMI 33 of the DSRC on-vehicle device 30.

  The sensor unit 60 includes a speed sensor 61, a rotation speed sensor 62, and an acceleration sensor 63.

  The speed sensor 61 acquires a vehicle speed pulse output from the vehicle 90 and calculates the speed of the vehicle.

  The rotational speed sensor 62 acquires a signal of the rotational speed (rotational speed) of the engine of the vehicle 90 from the vehicle.

The acceleration sensor 63 detects an impact applied to the vehicle 90 as a gravitational acceleration (G value). Naturally, it may be detected as a general acceleration value, and in this case, the G value table is an acceleration corresponding to each G value (1G≈9.8 m / s ² ). The acceleration sensor 63 generally detects each of the three axial directions (vertical, horizontal, and longitudinal directions). However, when the system configuration is simple, only one direction may be detected.

  The card insertion unit 57 stores the authentication information of the vehicle 90 or the driver, or the card 58 is inserted to record the value of each sensor detected by the operation recording device 50 or the operation of the driver.

  The clock 56 has a timer function and a time specifying function. As will be described later, the time 56 specifies the time when the operation recording device 50 records operation information, and changes the reference G value from the standard value. Or count the period. For example, after the reference G value is changed by the traffic information of a certain public DSRC roadside machine 20, when the vehicle 90 moves and the traffic information becomes unusable, it is desirable to return the changed reference G value to the standard value. Therefore, when a predetermined time has elapsed since the last traffic information was acquired using the timer function of the clock 56, the CPU 51 returns the reference G value to the initial value as described in a specific example described later. If a parameter other than the G value is used as the threshold for risk determination, the threshold for that parameter is changed.

  In addition, the establishment DSRC roadside machine 80 which has the same function as the public DSRC roadside machine 20 is installed in the office of the operation manager of the vehicle 90. The business establishment server is connected to the establishment DSRC roadside machine 80, and this establishment server can acquire the operation record recorded in the operation recording device 50 of the vehicle 90 via the establishment DSRC roadside machine 80. .

Some specific examples of the operation support system 10 having the above configuration will be described.
<Specific example 1>
FIG. 5 is a diagram illustrating an installation example of the operation support system 10 in this specific example. Here, the first and second public DSRC roadside devices 20a and 20b (before and after the accident frequent occurrence zone (area A1) where the accident occurs frequently on the road 92 (when not distinguished from each other, simply “public DSRC roadside device 20”) Will be installed in the roadside belt. And the traffic information regarding area A1 is transmitted from public DSRC roadside machine 20 (20a, 20b) with respect to the vehicle 90 which approached area A1.

  This information provision processing will be described based on the sequence diagram shown in FIG. Here, the vehicle 90 is traveling on the road 92 from the lower left side to the upper right side in the figure.

  The first and second public DSRC roadside devices 20a and 20b always detect whether or not the vehicle 90 is approaching. More specifically, the vehicle presence / absence determining unit 23 determines the presence / absence of a signal from the DSRC in-vehicle device 30. When the vehicle presence / absence determination unit 23 detects a signal from the DSRC on-vehicle device 30 (S110), the transmission signal generation unit 24 generates a transmission signal including surrounding traffic information, and the radio unit 25 transmits the signal (S112). ). In this case, information indicating that the area ahead of the first public DSRC roadside machine 20a is an accident-prone area is transmitted. The first public DSRC roadside machine 20a may always output traffic information regardless of the presence or absence of the vehicle 90, but it is desirable to output it when the vehicle 90 exists from the viewpoint of reducing power consumption.

  Next, the operation of the DSRC on-vehicle device 30 of the vehicle 90 will be described. The DSRC in-vehicle device 30 constantly detects transmission of traffic information and the like from the public DSRC roadside device 20 (N in S210). And if transmission of the traffic information from the public DSRC roadside machine 20 is detected (Y of S210), CPU31 will notify traffic information to the operation recording apparatus 50 from I / F35.

  Subsequently, the operation of the operation recording device 50 will be described. The operation recording device 50 acquires and records information such as the speed of the vehicle 90 and the engine speed at a predetermined interval such as every 0.5 seconds (S310). Then, the CPU 51 monitors the G value detected by the acceleration sensor 63 and determines whether or not it is below the reference G value (S312). In addition, as a criterion for determining danger, when values such as speed and engine speed other than the G value are set as reference values, the determination is made based on the reference values.

  When the detected G value exceeds the reference G value (N in S312), the CPU 51 notifies the driver of the danger from the HMI 53 (S314). Further, the CPU 51 records the result of the danger notification on a recording medium such as the memory 54 (S316).

  Then, when it is equal to or less than the reference G value (Y in S312) or when the record of danger notification is recorded in the step of S316 (S316), it is next determined whether or not traffic information is newly received from the DSRC on-board device 30. (S318). In other words, it is determined whether the traffic information including the contents used when changing the reference G value of the operation recording device 50 is newly received from the public DSRC roadside machine 20.

  The CPU 51 executes an application for risk determination and calculates a reference G value to be newly set (S320). Specifically, the reference G value is calculated based on the G value table of FIG. Then, the calculated G value is set as a new reference G value, and is used for the determination of the risk notification (S322). At this time, the CPU 51 may change the threshold for determining the danger based on the speed, the engine speed, etc., together with the change of the reference G value.

  Further, the CPU 51 records the calculated reference G value as dangerous area rank information together with operation information (speed, steering wheel operation amount, etc.) of the vehicle 90 on a predetermined recording medium (for example, the card 58 or the memory 54) (S324). ). The dangerous area rank information is analyzed at an office or the like after the operation of the vehicle 90 is completed, and is used as an index for safe driving evaluation. For example, when temporary stop information or rainy weather 40 km / h restriction information is received as restriction information, whether or not the restriction information is observed can be confirmed based on the stop record and speed record of the vehicle 90.

  Following the step of S324, the CPU 51 starts the timer function of the clock 56 (S326) and returns to the step of S310.

  On the other hand, if new traffic information is not received from the DSRC in-vehicle device 30 in the step of S318 (N of S318), the CPU 51 checks whether or not the timer of the clock 56 is operating (S328). If the timer is not operating (N in S328), the process returns to S310. If the timer is operating (Y in S328), it is checked whether the timer is counting up (S330). If the timer has not counted up (N in S330), the process returns to S310.

  When the timer is counting up (Y in S330), the CPU 51 returns the reference G value to the standard value (S332), records that the reference G value is changed in the memory 54 or the card 58 (S334), and S310. Return to step.

  In addition, the process in the above DSRC onboard equipment 30 and the operation recording apparatus 50 is continuously performed in the vehicle 90 operating state.

<Specific example 2>
In this specific example, when predetermined information is acquired in a facility that provides an information providing service using DSRC, the reference G value used for determination of a danger notice is changed. Here, for example, use of facilities such as parking lots and drive-through restaurants is assumed. Hereinafter, based on the flowchart of FIG. 7, it demonstrates paying attention mainly to operation | movement of the DSRC onboard equipment 30 and the operation recording apparatus 50 of the vehicle 90. FIG. In the first specific example, the timer is activated after the traffic information is acquired, and the period during which the traffic information is effectively reflected in the operation recording device 50 is determined. In this specific example, the traffic information acquired from the facility is effectively reflected in the operation recording device 50 after entering a certain facility until going out.

  When the vehicle 90 approaches the predetermined facility, the on-board DSRC device 30 acquires information on the facility (hereinafter also referred to as “facility information”) from the facility DSRC roadside device 70 and notifies the driver as necessary. In addition, the operation recording device 50 is notified (S410). Facility information is information such as the congestion status of the facility, parking waiting time, and the presence of a stop line. In response to the notification, the operation recording device 50 records the facility information in the memory 54.

  When the vehicle 90 enters the facility, the DSRC on-vehicle device 30 communicates with the facility DSRC roadside unit 70 installed at the facility entrance (S412), and provides vehicle gate information indicating that the vehicle 90 has entered the facility. Obtain (S414).

  The DSRC in-vehicle device 30 notifies the operation recording device 50 that the gate information has been acquired (S416). More specifically, the CPU 31 of the DSRC vehicle-mounted device 30 notifies the gate information to the CPU 51 of the operation recording device 50 via the I / F 35.

  Then, the CPU 51 of the operation recording device 50 calculates a reference G value to be used in the facility based on the facility information recorded in the memory 54 (S418). The reference G value calculation process is the same as the process described with reference to the tables of FIGS. For example, the facility DSRC roadside machine 70 includes, as one of the information to be provided, “transport information: settlement 1 and information related to sidewalk driving (first category…“ payment 1 ”, second category…“ sideways ”). Is transmitted to the vehicle 90 (the DSRC on-vehicle device 30). The DSRC in-vehicle device 30 that has acquired the traffic information notifies the operation recording device 50 to that effect. As described above, the operation recording device 50 (CPU 51) calculates the reference G value with reference to the G value table of FIG. 3, and sets the calculated reference G value as the reference G value used in the facility. (S420). Of course, the threshold for risk determination may be changed for other parameters such as speed and engine speed.

  The changed reference G value is continuously used until the vehicle 90 leaves the facility. When the vehicle 90 leaves this facility, the DSRC vehicle-mounted device 30 communicates again with the facility DSRC roadside device 70 installed at the exit (S422), and acquires the gate information that the vehicle 90 has left the facility. (S424).

  The DSRC vehicle-mounted device 30 that has acquired the second-time gateway information notifies the operation recording device 50 to that effect (S426). The operation recording device 50 receives the notification and returns the reference G value to the initial value (standard value) (S428).

  According to this specific example, when the vehicle 90 enters the facility, the operation recording device 50 can change a threshold value such as a G value for determining danger. In general, in parking lots and shopping center sites, etc., the speed at which a road is judged to be dangerous differs from a general road, but the threshold for judging the degree of danger can be changed, so that the danger can be judged effectively.

<Specific example 3>
In this specific example, the operation in the office that manages the operation of the vehicle 90 will be described. FIG. 8 is a sequence diagram (flow chart) showing an outline of the threshold value setting operation of the operation recording device 50 of the vehicle 90 in the office. Here, the business operator changes the threshold value in accordance with the level of the driver of the vehicle 90 and the weather conditions during operation in the business office.

  First, the establishment DSRC roadside device 80 is installed, for example, at the entrance / exit of the establishment facility, and detects the presence / absence of the DSRC in-vehicle device 30 of the vehicle 90 to be loaded / exited (S150). The configuration of the establishment DSRC roadside machine 80 may be the same as the configuration of the facility DSRC roadside machine 70 and the public DSRC roadside machine 20. Further, the establishment DSRC roadside device 80 is connected to a predetermined in-office server (not shown) corresponding to the ITS server 12 described above.

  When the vehicle 90 is detected, the establishment DSRC roadside device 80 requests a unique ID from the DSRC on-vehicle device 30 of the vehicle 90 (S152). The unique ID is an authentication number determined for each operation recording device 50 (or card 58), and the DSRC in-vehicle device 30 is acquired from the operation recording device 50.

  The establishment DSRC roadside device 80 that has acquired the unique ID from the DSRC on-board device 30 notifies the unique server of the unique ID, and the domestic server determines an appropriate risk determination threshold (reference G value) for the unique ID. (S154). Then, the in-office server transmits the reference G value from the office DSRC roadside device 80 to the DSRC on-vehicle device 30 of the vehicle 90 (S156). At this time, the G value table of FIG. 3 described above is determined for each driver or vehicle 90, but all data of the G value table may be transmitted to the vehicle 90, or the G value table of the operation recording device 50 may be An instruction to change each value by, for example, +0.5 may be transmitted.

  Next, operations of the DSRC in-vehicle device 30 and the operation recording device 50 will be described. The DSRC on-vehicle device 30 requests the unique ID from the operation recording device 50 when the power is turned on and the processing such as the initial setting is completed (S250). In response to the request, the operation recording device 50 notifies the DSRC in-vehicle device 30 of the unique ID recorded in the ROM 55 or the card 58 (S350).

  When the unique ID is acquired from the operation recording device 50, the CPU 31 of the DSRC on-vehicle device 30 records the unique ID data in a predetermined storage area of the memory 34 (S252).

  Subsequently, the CPU 31 checks a request for a unique ID from the establishment DSRC roadside device 80 (S254). The check continues until the request for the unique ID is detected (N in S254). When the request is detected (Y in S254), the CPU 31 transmits the unique ID of the operation recording device 50 to the public DSRC roadside machine 20 ( S256).

  Then, the public DSRC roadside machine 20 transmits the reference G value, which is a threshold for risk determination suitable for the unique ID, to the vehicle 90 by the processing of S154 and S156 described above, so the DSRC on-board unit 30 uses the reference G value. The information is acquired and further notified to the operation recording device 50 (S258).

  The operation recording device 50 sets the threshold value for risk determination (reference G value) acquired via the DSRC in-vehicle device 30 (S352). With this G value as an initial set value during operation, the reference G value is appropriately changed when the traffic information shown in the above-described specific example is acquired. That is, the initial value itself can be changed for each unique ID.

  As described above, according to the first embodiment, the threshold for risk determination can be changed according to the surrounding environment of the vehicle, the ability of the driver, and the like, and prevention and avoidance of danger can be more effectively realized. In addition, since it is possible to accurately point out a point that the driver should be careful about, the driver can recognize the information more appropriately. In addition, since the equipment on the roadside side (public DSRC roadside machine 20 and facility DSRC roadside machine 70) may remain as it is, no new capital investment is required on the information providing side. In addition, a large design change is not necessary in the configuration of the DSRC on-vehicle device 30 or the operation recording device 50, and even if a new function for realizing the present embodiment is added to the conventional configuration, it leads to a large cost increase. It is easy to introduce. Moreover, since the state determined to be dangerous is recorded together with the traffic information, the later analysis can be performed more effectively.

<Second Embodiment>
In the first embodiment, the reference G value for risk determination is calculated by the operation recording device 50. However, in this embodiment, the reference G value is calculated by the DSRC vehicle-mounted device 30, and the calculation result is recorded in the operation record. Notify the device 50. And the operation recording apparatus 50 determines with danger based on the notified reference | standard G value.

  Since the configuration of the present embodiment can be realized with the same configuration as that of the first embodiment, processing different from that of the first embodiment will be described below for each processing.

  The DSRC in-vehicle device 30 records the G value table shown in FIG. 3 and the classification (group) in each category shown in FIG.

  When the DSRC in-vehicle device 30 acquires traffic information including the contents shown in FIGS. 3 and 4 from the public DSRC roadside device 20 and the facility DSRC roadside device 70 via the wireless unit 32, the CPU 31 detects the G value. With reference to the table, a reference G value to be newly set in the operation recording device 50 is calculated.

  Further, the DSRC on-vehicle device 30 notifies the operation recording device 50 of the calculated reference G value. The operation recording device 50 records the notified reference G value in the memory 54 as a reference G value for risk determination. Next, the CPU 51 of the operation recording device 50 compares the G value detected by the acceleration sensor 63 with the newly set reference G value, and determines the danger as in the first embodiment.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, only the reference G value is transmitted from the DSRC in-vehicle device 30 to the operation recording device 50. For this reason, the communication process of the DSRC vehicle-mounted device 30 and the operation recording device 50 is simplified.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combinations of the respective components and processes, and such modifications are also within the scope of the present invention.

  In the above embodiment, the danger is determined by changing the threshold value such as the G value, but the operation in danger may be changed in accordance with the change of the threshold value. For example, when the threshold value is lowered, there is a possibility that the chance of being judged as dangerous may increase. In that case, since the capacity of the recording medium may be insufficient in the configuration for recording the photographing of the camera 59, the recording time may be shortened. Specifically, for example, recording from 20 seconds ago is assumed to be recording from 10 seconds ago.

  In addition, the vehicle 90 has acquired traffic information such as accident-prone points from the public DSRC roadside device 20, but may be configured to be preliminarily stored in the DSRC onboard device 30 or the operation recording device 50 as a database. Since there is a case where a dangerous zone is analyzed based on data recorded in a plurality of operation recording devices 50 by an operator or the like, safe operation becomes more effective by reflecting the result.

It is a figure which shows schematic structure of the operation assistance system based on 1st Embodiment. It is a functional block diagram of a public DSRC roadside machine, a DSRC in-vehicle device, and an operation recording device of the operation support system according to the first embodiment. It is a table which showed the G value table which should be set up according to traffic information concerning a 1st embodiment. It is a figure which shows the table | surface shown after classifying into the 1st and 2nd category about the content of the traffic information based on 1st Embodiment. It is the figure which showed typically the vehicle which is approaching the accident frequent occurrence zone based on 1st Embodiment, and the 1st and 2nd public DSRC roadside machine installed in the proximity area of an accident frequent occurrence zone. It is the sequence figure which showed the process when traffic information was acquired especially approaching to the accident frequent occurrence zone about the process of the operation assistance system which concerns on the 1st specific example of 1st Embodiment. A process for changing a reference G value used for determination of a danger notice when predetermined information is acquired in a facility that provides an information providing service using DSRC according to the second specific example of the first embodiment. It is the shown flowchart. It is a sequence diagram (flowchart) which shows the outline | summary of the setting operation | movement of the threshold value of the operation recording apparatus of a vehicle in the establishment based on the 3rd specific example of 1st Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Operation support system 12 ITS server 20 Public DSRC roadside machine 20a 1st public DSRC roadside machine 20b 2nd public DSRC roadside machine 22 Information transmission control part 23 Vehicle presence determination part 24 Transmission signal generation part 25, 32 Radio | wireless part 26, 34, 54 Memory 27, 31, 51 CPU
28 Information Collection Unit 30 DSRC On-board Unit 33, 53 HMI
35,52 I / F
50 Operation recording device 55 ROM
56 Clock 57 Card insertion part 58 Card 59 Camera 60 Sensor part 61 Speed sensor 62 Speed sensor 63 Acceleration sensor 70 Facility DSRC roadside machine 80 Establishment DSRC roadside machine 90 Vehicle

Claims (7)

It is an operation recording device that is mounted on a vehicle, records the operation state of the vehicle, and determines that a danger has occurred when the vehicle enters a predetermined state, and notifies the driver to that effect,
External information acquisition means for acquiring predetermined information transmitted toward the vehicle from the outside;
Based on the predetermined information, reference changing means for changing a reference for determining that a danger has occurred;
With
The predetermined information is information of a first category indicating what kind of information is information and how the driver should pay attention in relation to the information of the first category. A second category of information,
The reference changing means has a table in which a reference for determining that a risk has occurred after grouping the first category and the second category into a matrix and describing the information is provided. If the reference is changed with reference to the table and the driver is notified based on the predetermined information, the notification is classified into the matrix. If it should be determined that the information that can be identified with the information of the criterion for determining that the danger has occurred, the criterion is changed to reflect the information that can be identified. Operation recording equipment characterized by.   The operation recording device according to claim 1, further comprising initial reference setting means for changing an initial value of a reference to be changed based on the predetermined information.   The operation recording device according to claim 1, wherein the reference changing unit returns the reference to a reference before the change when a predetermined time has elapsed after the change of the reference.   The operation recording device according to any one of claims 1 to 3, wherein the predetermined information is traffic information transmitted by DSRC.   The operation recording device according to any one of claims 1 to 3, wherein the predetermined information is information on a predetermined facility transmitted by DSRC.   The operation recording device according to any one of claims 1 to 5, wherein the external information acquisition unit and the recording unit that records the operation state of the vehicle are configured separately in different devices. An information acquisition step of acquiring traffic information from a predetermined external communication device using DSRC;
In accordance with the acquired traffic information, a reference changing step for changing a reference value when judging that a danger has occurred,
A danger detection step of determining that a danger has occurred in the running of the vehicle when the running state of the vehicle becomes a predetermined state with respect to the reference value;
A danger notification process for notifying the driver that a danger has occurred;
An operation recording step of recording the state of operation of the vehicle in association with the occurrence of the danger and the reference value,
The traffic information indicates information of a first category indicating what kind of information it is and information on which the driver should be careful in relation to the information of the first category. A second category of information,
In the reference changing step, when the traffic information is acquired, a criterion for determining that a risk has occurred after grouping the first category and the second category into a matrix is described. When the reference is changed with reference to the table and the driver is notified based on the predetermined information, the notification is classified into the matrix. When the information that can be identified with the information of the reference for determining that the information is identified is included, the reference is changed to reflect the information that can be identified. Status recording method.

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