JP5695523B2 - Vehicle information acquisition system - Google Patents

Description

  The present invention relates to a system for acquiring predetermined information on a vehicle, and more particularly, to a method of reading information from a memory mounted on a vehicle and providing the information to an analysis apparatus or the like.

  2. Description of the Related Art Conventionally, an event data recorder (hereinafter abbreviated as EDR) mounted on an automobile for recording information related to driving is known (see Patent Document 1). When the EDR detects an impact of a predetermined value or more by using, for example, an acceleration sensor, the EDR records outputs before and after the impact detection of various devices mounted on the automobile in a ROM (memory). By analyzing the information recorded in this way, it is possible to grasp abnormal conditions that are different from normal driving conditions such as impacts, sudden braking, sudden changes in vehicle speed, etc. It becomes possible to analyze.

Japanese Patent Laid-Open No. 2008-310764

  However, in order to acquire EDR information in the system described in Patent Document 1, an automobile is brought into a specific facility such as a maintenance company, a computer device is connected to a diagnostic connector, and data (information) is stored from a memory. Need to download. In this way, it takes time and effort to move a car to a specific facility, especially when the car is broken or damaged, it may not be able to run on its own, so it is difficult to move to such a facility. There are many cases.

  In this regard, for example, it is conceivable to download data from the EDR memory using a portable device such as a notebook PC, but in this case, the information downloaded to the portable device is erroneously rewritten. Or part of the information may be lost. That is, there is a concern that the credibility of information is impaired and the driving situation of the automobile cannot be accurately analyzed.

  The present invention has been made in view of such points, and its purpose is to make it possible to easily obtain predetermined information from a memory such as an EDR mounted on a vehicle and to ensure the authenticity of the information. It is in.

  In order to achieve the above-mentioned object, the present invention is mounted on a vehicle, and is configured to be a non-volatile memory in which predetermined vehicle information relating to the vehicle is recorded, and not to be mounted on the vehicle, but to be portable by humans. The vehicle information is read from the non-volatile memory, encrypted and stored, and a portable reader capable of outputting the encrypted information is not mounted on the vehicle and is separate from the portable reader. An information acquisition system for a vehicle comprising: an analysis device configured to analyze the encrypted information output from the portable reading device and decrypt it into the vehicle information.

  According to the above system, first, predetermined vehicle information is recorded in a non-volatile memory mounted on the vehicle. Even if the main power of the vehicle is turned off, the information in the nonvolatile memory is not erased and is retained. In order to acquire this vehicle information, it is only necessary to read and store information from a non-volatile memory using a portable reading device, so that the vehicle itself does not have to move to a specific facility or the like, and the vehicle information can be easily obtained. Can be acquired.

  Moreover, since the vehicle information read from the nonvolatile memory as described above is encrypted and stored as encrypted information in the portable reading device, this encrypted information is provided to the decrypting device and decrypted (decrypted). Until then, there is no worry about accidental rewriting or loss of information. In other words, the credibility of information is extremely high. Note that a decryption program is not installed in the portable reader.

  Here, the vehicle information is not limited to the information for analyzing the driving situation, but as an example, the correlation between the user's riding method and the fuel consumption is examined, or the situation in which trouble such as abnormal noise occurs is specified. Various information suitable for the application may be recorded. For example, in the non-volatile memory, abnormal time information related to an abnormal state of the vehicle and identification information that can be used for identifying the vehicle may be recorded as the vehicle information.

  In addition, the abnormal state may be an impact caused by a fall, for example in the case of a motorcycle, but it also corresponds to an operation that is unlikely to occur during normal movement, such as excessive sudden braking and sudden steering. As a result, the moving state of the vehicle that may be related to the fall may be set. Moreover, you may make it determine with an abnormal state based on intervention of well-known traction control or antilock control. Based on the information at the time of abnormality, it becomes possible to grasp the situation such as a fall and analyze it. On the other hand, the identification information may be, for example, a vehicle model and destination, as well as a vehicle body number, and the reliability of the vehicle information is further enhanced by including this identification information.

  The non-volatile memory may be disposed in a non-detachable manner on a controller for driving control of the vehicle. For example, a semiconductor memory may be disposed on a base of the controller. In this way, it is only necessary to add a routine for recording vehicle information to the control program of the controller, and a dedicated recording device is unnecessary, which is advantageous for space saving and cost reduction. In this case, the identification information may be the model number of the controller.

  The non-volatile memory may be non-rewritable, and for example, a semiconductor memory such as a PROM (Programable ROM) and an EPROM (Erasable Programmable ROM) can be used. This not only prohibits rewriting or overwriting of information in a program that records vehicle information in the non-volatile memory, but also the non-volatile memory itself does not accept rewriting or overwriting of information. The sex becomes even higher.

  Further, not only the abnormal time information but also normal time information related to the normal state of the vehicle may be recorded in the nonvolatile memory as the vehicle information. The normal time information may be general information that is not included in the above-described abnormal time information. For example, it may be information such as a driving operation or a moving speed that represents a normal riding method of the user, or even a history thereof. Good. By combining such normal time information with the abnormal time information and the like, it is possible to improve the accuracy of analysis of the driving situation such as a fall.

  In this case, the recording amount per hour of normal information may be smaller than that of abnormal information, and in this way, as much useful information as possible is recorded within the limited recording capacity range of the nonvolatile memory. be able to. In addition, the number of times of abnormal information recording may be limited to a preset number of times, which can prevent overwriting of abnormal information exceeding the set number of times and is advantageous in securing a storage capacity for normal information. become.

  As described above, according to the vehicle information acquisition system according to the present invention, it is not necessary to move the vehicle itself to a specific facility or the like in order to acquire the vehicle information. It can be easily provided to a decryption device. Vehicle information is recorded in the vehicle's non-volatile memory and is encrypted when it is read by the portable reader, so it may be inadvertently rewritten or lost until it is decoded (decrypted) by the decoder. There is no credibility.

1 is a left side view of a motorcycle according to an embodiment of the present invention. FIG. 2 is a block diagram for explaining an EDR mounted on the motorcycle shown in FIG. 1. It is a flowchart explaining operation | movement of EDR shown in FIG. It is explanatory drawing which shows typically the period when event data and history data are recorded. It is drawing explaining the distribution of the vehicle speed range contained in history data as an example. It is explanatory drawing of a structure of the acquisition system of event data and history data. It is a flowchart explaining operation | movement of the data acquisition system shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout all the drawings, and redundant description is omitted. Moreover, the concept of the direction used in the following description is based on the driver who gets on the vehicle.

  FIG. 1 is a left side view of a motorcycle 1 (vehicle) according to an embodiment of the present invention. As shown in FIG. 1, the motorcycle 1 includes a front wheel 2 and a rear wheel 3, and the front wheel 2 is rotatably supported by lower end portions of a pair of left and right front forks 4 extending substantially in the vertical direction. Although not shown, the upper portions of the left and right front forks 4 are connected to each other by a pair of upper and lower brackets and are rotatably supported by the vehicle body side head pipe 5 via a steering shaft (not shown). Has been. Further, a bar-type handle 6 extending left and right is attached to the upper bracket, and by rotating the handle 6, the driver can move the front wheel 2 in a desired direction with the steering shaft as a rotation axis. Can be turned around.

  In addition, the grip on the right side of the handle 6 gripped by the driver's right hand is a throttle grip (not shown) that is rotated by twisting the wrist to adjust the traveling speed. A clutch lever 8 is provided in the front. A meter unit 9 having a meter for displaying the traveling speed and the engine speed is disposed in front of the left and right central portions of the handle 6.

  On the other hand, a pair of left and right main frames 10 extend rearward from the head pipe 5 behind the handle 6 while being slightly inclined downward, and a pair of left and right pivot frames 11 are connected to the rear part. The pivot frame 11 pivotally supports a front end portion of a swing arm 12 extending substantially in the front-rear direction, and a rear wheel 3 as a drive wheel is rotatably supported at the rear end portion of the swing arm 12. A fuel tank 13 is provided above the main frame 10, and a seat 14 for riding is provided behind the fuel tank 13.

  An engine E is mounted below the main frame 10 while being supported by the main frame 10 and the pivot frame 11. As an example, on the rear side of the engine E, a throttle device 15 is disposed between the left and right main frames 10, and an air cleaner box 16 is connected to the upper portion of the throttle device 15. On the other hand, an exhaust pipe 17 is connected to the front side of the engine E, and extends under the engine E to the rear. A cowling 19 is provided so as to cover the engine E and the like including the exhaust pipe 17 from the front of the vehicle body to both sides.

  Further, in the motorcycle 1 of the present embodiment, an ECU 18 (controller for operation control) for mainly performing operation control of the engine E or the like is provided, and is housed below the seat 14 as an example. The original function of the ECU 18 is to execute predetermined control programs based on input information from various sensors provided in the motorcycle 1 and to give drive commands to various actuators of the engine E, thereby It is a control apparatus for performing operation control of. As an example, the ECU 18 gives a drive command to the fuel injection device and the ignition device based on information from a throttle opening sensor, a vehicle speed sensor, an intake pressure sensor, and a gear position sensor. Perform operations suitable for the driving conditions.

  In addition, the ECU 18 of the present embodiment also has a function as an event data recorder that records predetermined vehicle information as described below. As an example, when the fall of the motorcycle 1 is detected by the fall sensor 21. In addition, event data useful for grasping the situation is recorded. As the fall sensor 21, a sensor that detects the acceleration or posture around the front-rear axis of the motorcycle 1 can be used. In the case of posture detection, the fall sensor 21 has a built-in pendulum type movement, and has a detection circuit that outputs a detection signal when the movement detects a rotation state of a predetermined angle or more.

  The overturn sensor 21 detects that the motorcycle 1 has tilted in the left-right direction by a predetermined angle (for example, 65 degrees) or more. In the example of FIG. It is fixed to the inner surface of the. Based on the input information from the fall sensor 21, the ECU 18 instructs the various actuators to stop the engine E when determining that the motorcycle 1 has fallen. This can prevent the engine E from operating even after it falls.

-Event data recorder-
FIG. 2 is a block diagram for explaining an event data recorder 20 (hereinafter abbreviated as EDR 20) mounted on the motorcycle 1 shown in FIG. The EDR 20 of the present embodiment is configured by using the calculation function of the ECU 18, and the ECU 18 is connected to at least the other sensors 22 and various switches 23 in addition to the fall sensor 21. The ECU 18 is connected to at least an intake device 15 of the engine E, a fuel injection device, an ignition device, and the like.

  Although not shown individually, the various sensors 22 include an engine speed sensor, a throttle position sensor, a gear position sensor, vehicle speed sensors for the front wheels 2 and the rear wheels 3, an acceleration sensor, a gyro sensor (bank angle detection device), A GPS sensor, a suspension stroke sensor, a tire pressure sensor, a grip pressure sensor, a seat pressure sensor, a water temperature sensor, a hydraulic pressure sensor, a driver monitoring sensor, a two-seater detection sensor, and the like are provided. The various switches 23 are provided with a brake switch, a clutch switch, a stand switch, and the like.

  The ECU 18 receives the outputs from the fall sensor 21 and various sensors 22 and various switches 23, performs operation control of the engine E, and stores the outputs while updating them every predetermined time. Any one of them is recorded as predetermined vehicle information related to the motorcycle 1. Further, the ECU 18 is provided with a system diagnosis connector 26. As will be described in detail later, the portable reader 40 is connected to the diagnosis connector 26 via a communication line 39 (see FIG. 6). The vehicle information data is read.

  More specifically, the output from the various sensors and the switches 21 to 23 is recorded in the RAM 34 (the power is not supplied by the data output control unit 32 of the ECU 18 while the power of the motorcycle 1 is ON. Is stored as time-series data in a temporary storage device from which data is erased and updated every predetermined time. Then, predetermined data (normal information) corresponding to the normal use state of the motorcycle 1 is recorded as history data in the non-volatile memory 35 that is not erased even if power is not supplied. Further, for example, if the motorcycle 1 falls, predetermined data (information at the time of abnormality) that can be related thereto is recorded in the nonvolatile memory 35 as event data.

  That is, as an example, the ECU 18 includes a fall determination unit 30, a trigger generation unit 31, a data output control unit 32, and a time generation unit 33. The fall determination unit 30 has a function of determining whether or not the motorcycle 1 is in a fall state based on the output of the fall sensor 21. The trigger generation unit 31 has a function of transmitting a trigger to the data output control unit 32 when the fall determination unit 30 determines that the motorcycle 1 has fallen. The data output control unit 32 has a function of reading event data from the RAM 34 and recording it in the nonvolatile memory 35 so that it cannot be overwritten when a trigger is received from the trigger generation unit 31. The time generation unit 33 has a timer function that appropriately transmits the current time to the data output control unit 32.

  Further, on the circuit board of the ECU 18, a RAM 34 made of a semiconductor memory and, for example, a non-volatile memory 35 made of a semiconductor memory incapable of rewriting data once stored, such as an EPROM, are soldered and attached non-detachably. ing. The data output control unit 32 may read the history data from the RAM 34 and record it in the nonvolatile memory 35 when recording the event data in the nonvolatile memory 35 as described above. The history data may be recorded in the nonvolatile memory 35 regardless of the fall determination. As an example, even when the power of the motorcycle 1 is turned off, the power supply may be maintained for a certain period, and history data may be read from the RAM 34 and recorded in the nonvolatile memory 35.

  Thus, by storing history data in the nonvolatile memory 35 at a time different from the occurrence of the EDR trigger, the number of times history data is stored in the nonvolatile memory 35 can be reduced, and the amount of data to be stored at the time of a fall is reduced. The event data can be stably stored in the nonvolatile memory 35. Furthermore, it is preferable that history data from when the power is turned off until when an EDR trigger occurs is stored in the nonvolatile memory 35 together with the event data. As a result, the history data immediately before the fall can also be stored in the nonvolatile memory 35.

  As an example, in the nonvolatile memory 35, a history data storage area and an event data storage area are set separately. In particular, for event data, two storage areas for mirroring are set. . Therefore, as described above, when the data output control unit 32 records the event data in the nonvolatile memory 35 triggered by the overturn of the motorcycle 1, the system becomes electrically unstable due to an impact at the time of the overturn. Even so, the authenticity can be confirmed by comparing the data in the two storage areas.

  The nonvolatile memory 35 also stores identification information data that can be used to identify the motorcycle 1 together with the event data and history data. As an example, the identification information may be a model number of the ECU 18 or may be information such as the model or destination of the motorcycle 1. Further, the total operation time of the motorcycle 1 from the factory shipment included in the history data can also be used as identification information.

-Event data recorder operation-
Next, the operation of the EDR 20 will be described with reference to the flowchart shown in FIG. As an example, as shown in FIGS. 2 and 3, first, when the driver turns on the power, the data output control unit 32 of the ECU 18 stores the outputs of the fall sensor 21, various sensors 22, and various switches 23 in the RAM 34. Update every predetermined time. That is, the data exceeding the storage capacity of the RAM 34 is overwritten and stored in order from the oldest data area. The event data stored in the RAM 34 may be updated every time a predetermined amount of data is stored, not every predetermined time, and the old data is erased according to a predetermined condition and new data is stored. That's fine. Then, for example, by referring to the output of the speed sensor of the rear wheel 3, it is determined whether or not the motorcycle is in a traveling state (step SA1: traveling?), And if the determination is No, the process returns to step SA1. .

  On the other hand, if it is determined that the running state is Yes, the fall determination unit 30 next determines whether or not the motorcycle 1 has fallen based on the output from the fall sensor 21 in step SA2. If this determination is No and the motorcycle 1 is not overturned, history data is calculated from the sensor and the output data of the switch 23 stored in the RAM 34 (step SA3), and the history data stored in the RAM 34 is stored. The information is stored in the area, and the process returns to step SA1.

  On the other hand, when the motorcycle 1 falls and the vehicle body continuously tilts at a predetermined angle or more, and the output corresponding to the detection state is continuously output from the fall sensor 21 for a predetermined time, the above-mentioned step SA2 It is determined that the vehicle has fallen, and it is then determined whether or not the fall is less than the preset number n (step SA4). If the number of falls i <n is determined as Yes, the data output control unit 32 reads the event data and the history data from the RAM 34 and records them in the nonvolatile memory 35 so as not to be overwritten (step SA5). Thereafter, in step SA6, the cumulative number of falls i is incremented (i ← i + 1), and the process returns to step SA1.

  On the other hand, even if the motorcycle 1 falls and the determination of falling is made as described above (Yes in step SA2), if the cumulative number of times i of the determination of falling is equal to or greater than the set number n (No in step SA4), Event data is not recorded in the nonvolatile memory 35. In this case, only the history data is read from the RAM 34 by the data output control unit 32 and recorded in the non-volatile memory 35 so as not to be overwritten (step SA7), and then the process returns to step SA1.

  That is, as described above, the non-volatile memory 35 is non-rewritable and its storage capacity is limited. Therefore, event data with a very large amount of data can be set to the recording count n (for example, n = 3). To 5). As schematically shown in FIG. 4, the event data De is data of outputs of the various sensors 22 and the various switches 23 between the trigger reception time point and a past time point that is a predetermined time (for example, 8 seconds) from there. Since the sampling time is short, the amount of data is very large even if the time interval is short.

  On the other hand, the history data Dh is, for example, the maximum value of the past vehicle speed (rear wheel vehicle speed), the number of times the power is turned on, and the like, and the amount of data per hour is much smaller than the event data. Therefore, the history data can be recorded for almost 10 years or more without setting the storage area of the history data in the nonvolatile memory 35 so large.

  That is, in the present embodiment, for event data whose data amount is very large to represent the situation when the motorcycle 1 falls, the recording number is limited, and the storage capacity of history data from the factory shipment to the present is limited. Therefore, it is possible to record as much useful information as possible within the limited recording capacity of the nonvolatile memory 35. As described above, history data recording is continued even if the limit number of event data recording is exceeded, and the number of falls is included in the history data recording.

-Event data-
Specifically, event data includes at least information related to the operation of the driver of the vehicle, grasps the situation of the fall, and is easy to analyze the information. The information may be information related to the operation and may result in a fall. In other words, event data is related to driver operations that are unlikely to occur during normal movement, such as excessive sudden braking, sudden steering, sudden acceleration, etc., which are listed as factors of falling, and as a result, it may lead to falling However, even if it is not related to the operation of the driver, it may be useful for grasping and analyzing the fall situation.

  The event data is stored at time intervals determined in advance by information on output values from a plurality of sensors. Each information may be set so that the time interval stored from the magnitude of the time change is different. For example, information having a small change with time is set to have a longer time interval than information having a large change with time. In addition, each information may be stored so that the passage of time is synchronized so that the respective information can be compared at the point of interest. In addition, a plurality of output values from the sensor of interest are stored with the passage of time so that a change in the output value of the sensor over time can be determined. For example, assuming that the sampling period is s, the stored period is set as s × m (m is a natural number) retroactive from the trigger occurrence.

  As described above, the event data can easily analyze the fall situation by storing the information amount of the output value of the sensor / ECU as it is from a trigger occurrence to a period going back a predetermined period. Further, by limiting the period stored as event data to a predetermined period from the occurrence of the trigger, it is possible to prevent the data amount from undesirably increasing. As an example, the event data is stored in the RAM 34 with a sampling time of 0.1 to 0.5 seconds so that the situation when the motorcycle 1 is overturned and the cause thereof can be analyzed. Correspondingly, the data may be updated at intervals of about 10 seconds, for example.

  As shown in Table 1, the event data includes the front wheel speed, the rear wheel speed, the throttle opening, the gear position, the output of the clutch switch, the engine speed, the fuel injection amount, the error flag, and the various types of the motorcycle 1. It may be a mode or the like. Although not shown, output items specific to the motorcycle include the bank angle of the vehicle body output by the gyro sensor, the grip grip pressure of the driver output by the grip pressure sensor, and the like. If the transition of the bank angle of the motorcycle 1 at the time of falling is recorded, it is useful for analyzing the change in posture at the time of falling.

  More specifically, as the event data, a plurality of running speeds or driving wheel vehicle speeds are stored every predetermined period, in addition to the engine speed for a predetermined period that goes back from the occurrence of the trigger, so that the slip condition of the driving wheel immediately before the overturning is stored. Can be analyzed. Similarly, by storing a plurality of traveling speeds and driven wheel vehicle speeds for each predetermined period, it is possible to analyze the slip condition of the driven wheels immediately before falling.

  In addition, by storing error flags of various sensors / actuators as event data, it is possible to determine the presence / absence of abnormal states of various sensors / actuators immediately before the fall, and analyze whether the abnormal state has affected the fall. can do. Further, by storing the presence / absence of various engine control modes as event data, it is possible to analyze whether or not the vehicle has fallen due to various modes. For example, it is possible to determine the relationship between a fall and a permission / non-permission of output restriction control, fuel efficiency priority control, output suppression control permission at the time of slip determination, and ABS control permission at the time of front and rear wheel lock.

  Furthermore, the presence / absence of an execution state of control for supporting the driving operation, such as fuel cut control during deceleration, output suppression control during slip, or ABS control state during brake lock, may be stored as event data. As a result, it is possible to analyze whether the control state by the ECU immediately before the fall has affected the fall. In addition, the event data may include a bank angle, a steering angle, a brake pressure, an acceleration, a time change such as fuel information, turn signal operation information, presence / absence of a headlamp high beam, and a hazard lamp.

-History data-
On the other hand, the history data includes information related to the traveling movement state of the motorcycle 1, and indicates, for example, the tendency of the driver's driving operation. As shown in Table 2 below, the history data includes the maximum value of the vehicle speed (rear wheel speed), the number of times the power is turned on from the factory shipment until the occurrence of the nth EDR trigger, and from the occurrence of the nth EDR trigger to the reading. In addition to the number of times the power is turned on, it may be the cumulative time of TRC control (Traction Control), etc. In addition, the distribution of vehicle speed, throttle opening distribution, etc., the number of stalls, the number of falls (including standing jokes) There may be. These represent the normal use situation of the user of the motorcycle 1 and are used for analysis of the cause of the motorcycle 1 falling together with the event data.

  The history data includes the maximum value of the vehicle movement speed, the movement speed distribution (the movement speed measured from the factory shipment is accumulated for each speed range, and the accumulated result is shown for each speed range), the number of falls A cumulative value may also be included. The history data is processed and stored so as to reduce the amount of information using the accumulated value / extreme value of the output value of each sensor / ECU, so that the output value can be stored even when the data acquisition period is long. Compared to storing the data as it is, the data capacity can be reduced.

  For example, as history data, there are the number of power-on times and the power-on period of the motorcycle 1 that are cumulatively calculated from the time of factory shipment, as well as the number of power-on times and the power-on period that are cumulatively calculated from the time of factory shipment until the occurrence of the nth EDR trigger. By memorizing, it is possible to analyze the operation tendency of the driver until it falls.

  In addition, the travel travel speed distribution, throttle opening distribution, maximum vehicle speed, etc. of the motorcycle 1 are stored as history data, so that it is possible to determine the driver's driving tendency and use it to analyze the cause of the fall. it can. By storing the number of times engine stop control is executed at the time of overturn determination, the cumulative execution period during which output suppression control is executed at the time of slip determination (accumulation execution period of tracon control), etc., the driver's driving operation tendency can be similarly determined. .

  Furthermore, as history data, the number of engine stops, the number of times output suppression control was executed at the time of slip determination (the number of times of tracon control), the number of ABS controls, the cumulative execution period of ABS control, the maximum value of brake pressure, the number of occurrences of failure flags, failure Cumulative value / extreme value / average of various sensor output values such as the cumulative generation period of the flag, the number of times the reserve tank is used, the number of times the battery is exhausted, the maximum value of the throttle opening time change rate, the maximum value of the brake pressure time change rate, the maximum bank angle It may contain a value.

  Furthermore, in this embodiment, the amount of information is compressed by using processed values (cumulative value, extreme value, average value) of raw data as history data. However, the amount of information is compressed using other methods. May be. For example, the sampling interval may be increased compared to the event data.

  As an example of the history data, FIG. 5 specifically shows the distribution of travel speed of the motorcycle 1, that is, the distribution of the vehicle speed range. In this example, vehicle speed data from the time of a new vehicle is accumulated, and as an example, it is classified into first to sixth vehicle speed ranges and stored as accumulated use time. In this example, the driving frequency is highest in the third vehicle speed range, and then the driving frequency is high in the fourth vehicle speed range. Moreover, the driving time in the first vehicle speed range including the idle is relatively long. For this reason, it is considered that there are many urban areas and users do not travel at high speed.

  With the above configuration, according to the EDR 20 of the present embodiment, event data and history data are recorded when the motorcycle 1 falls, for example, as a trigger. Based on the information included in these data, the situation at the time of the fall is grasped and analyzed. It becomes possible to do. Instead of determining the fall of the motorcycle 1 based on the output from the fall sensor 21 as in the above embodiment, for example, based on the output from another sensor such as an acceleration sensor or a tire pressure sensor of the front wheel 2. Thus, the collision of the motorcycle 1 or the like may be determined, and data may be recorded accordingly.

  Further, based on outputs from grip pressure sensors provided on the left and right grips of the handle 6 of the motorcycle 1 and seating sensors provided on the seat 14, the driver can recognize the fact that the motorcycle 1 is traveling. When the vehicle is separated from the vehicle, it may be determined that the driver is thrown out of the motorcycle 1 as the motorcycle 1 falls, and data may be recorded accordingly.

-Data reading system-
FIG. 6 shows a system for acquiring history data and event data from the EDR 20 configured as described above. FIG. 6 schematically shows a situation in which the portable reading device 40 is connected to the ECU 18 of the motorcycle 1 via the communication line 39 and event data and history data are read from the nonvolatile memory 35 of the ECU 18. The portable reading device 40 may include a microcomputer, a memory, an I / O, and the like as an example, and may use an existing diagnostic tablet that is connected to the ECU 18 via the diagnostic connector 26 so as to be able to exchange data. In the present embodiment, a dedicated program for communicating with the data output control unit 32 of the ECU 18 to read data from the nonvolatile memory 35 and encrypting and storing it is installed in the diagnostic tablet.

  Since the diagnostic tablet is originally for reading a program and data information stored in the ECU 18, information other than event data and history data can also be read. Information other than event data and history data may not be encrypted, and may be displayed on the portable reading device 40 or configured to be changeable by the portable reading device 40. For example, an engine control program set for normal driving may be changed to an engine control program for circuit driving. In addition, the ECU 18 is configured so that the driver or the mechanic can arbitrarily change the ECU program or read information stored in the ECU 18.

  Then, the portable reader 40 can be configured using an existing diagnostic tablet, and event data and history data can be read out via the system diagnostic connector 26 provided in the ECU 18, so that a dedicated interface is provided separately. The number of parts can be reduced.

  In this embodiment, a display 40a and a switch 40b are provided on the front surface of the portable reading device 40. When the connector 39a of the communication line 39 is connected to the diagnostic connector 26 of the ECU 18 and a predetermined operation is performed, the nonvolatile memory 35 of the ECU 18 is displayed. Can read event data and history data. The read data is encrypted by a known method such as AES (Advanced Encryption Standard) as an example, and stored as an encrypted data file. Since the decryption program is not installed in the portable reading device 40, contents such as event data cannot be displayed. The encryption method is not limited to AES, and other general methods can be adopted.

  In the example of FIG. 6, the portable reading device 40 is provided with an external recording medium mounting unit 40c such as an SD card reader / writer as an example, and the encrypted data file is stored in an SD (Secure Digital) card memory. It can be written and stored in an external recording medium 41. As the external storage medium 41, a USB memory, a CD, a DVD, a microchip, or the like can be used in addition to the SD memory, and there is no particular limitation as long as it is nonvolatile. The storage medium is preferably a non-rewritable storage medium. By using a storage medium of a general-purpose product, the reader / external storage medium can be configured at low cost. Further, in order to read out event data and history data, a dedicated structure different from that for general-purpose products may be used. This limits the number of devices from which data can be read, and further prevents rewriting of information.

  The portable reading device 40 is not mounted on the motorcycle 1, and as an example, only the dealer of the motorcycle 1 or an employee at a service base is permitted to carry and use it. In addition, an analysis device 42 including a computer device separate from the portable reading device 40 is prepared in a specific facility such as a part of service bases or a development base of a manufacturer of the motorcycle 1. As an example, the analysis device 42 can be configured by installing a decryption program having an encryption key in a general-purpose personal computer. If the encrypted data file is provided to the analysis device 42 through the external recording medium 41 and is decrypted and decrypted into the original event data and history data, the situation such as a fall is grasped based on these data. The analysis can be performed.

-Operation of data reading system-
Next, a procedure for acquiring data from the EDR 20 will be specifically described with reference to the flowchart of FIG. First, as described above with reference to FIG. 6, an employee such as a store of the motorcycle 1 carries the portable reading device 40 and goes to a place where the motorcycle 1 is stored, for example, a fall site. In addition to the fall site, it may be a user's home or the like, or a store where the user brought the motorcycle 1 for repair. Even if the overturned motorcycle 1 can no longer run, the data in the nonvolatile memory 35 of the ECU 18 is retained.

  Then, the employee connects the connector 39a of the communication line 39 of the portable reading device 40 to the diagnostic connector 26 of the ECU 18, and turns on both the motorcycle 1 and the portable reading device 40. Then, when a predetermined download operation is performed using the switch 40b or the like of the portable reading device 40, it is determined that the download operation has been performed in the portable reading device 40, as shown in Step SB1 of the flow on the left side of FIG. A download command is output to the EDR 20 via the communication line 39, that is, to the ECU 18 (step SB2).

  Receiving this download command, the data output control unit 32 of the ECU 18 determines that there is a download command (Yes in step SC1), and first reads history data and event data from the nonvolatile memory 35 (step SC2). At this time, the data output control unit 32 compares the event data read from the two storage areas of the nonvolatile memory 35 and determines whether the two mirrored data are the same (step SC3: event data). No error?).

  If the two data are the same, it is determined Yes, and history data and event data are temporarily stored in the RAM 34 (step SC4). Also, if there is a difference between the two data, error information is added to the event data whose timing of writing to the nonvolatile memory 35 is earlier, and is temporarily stored in the RAM 34 together with the history data (step SC5). Thus, the history data and event data temporarily stored in the RAM 34 are transmitted to the portable reading device 40 via the communication line 39 by the data output control unit 32 (step SC6).

  The portable reading device 40 is on standby until the data is received (No in step SB3). When the data is received, it is determined as Yes, and the received data is encrypted and recorded. That is, the generated encrypted data file is written in the internal memory of the portable reading device 40 and is also written and stored in the external recording medium 41 (step SB4). Note that the encrypted data file may be written only in the internal memory and separately written in the external recording medium 41 when an operation is performed.

  When the encrypted data file is stored as described above, a message such as “data reading complete” is displayed on the display 40a of the portable reading device 40 (step SB5). Therefore, the external recording medium 41 is removed from the external recording medium mounting portion of the portable reading device 40 and is transported to the facility where the analysis device 42 is prepared. An employee such as a store carrying the portable reading device 40 may carry the external recording medium 41 to the facility or mail it as an example. The person in charge of the facility who has received the external recording medium 41 attaches it to the analysis device 42 to decrypt the encrypted data file, and decrypts it into the original event data and history data. Based on this data, it is possible to grasp the situation such as the fall of the motorcycle 1 and analyze it.

  As described above, in the data reading system according to the present embodiment, first, the EDR 20 is configured using the calculation function of the ECU 18 that controls the operation of the motorcycle 1, and event data indicating the situation such as a fall or the normal use situation Is recorded in the non-volatile memory 35 (vehicle information). These data can be read from the nonvolatile memory 35 by an employee such as a store using the portable reading device 40, encrypted, and stored in the external recording medium 41 or the like.

  Therefore, event data and history data can be easily acquired via the external recording medium 41 without moving the motorcycle 1 that has fallen over to a specific facility, and this can be provided to the decoding device 42 to fall over. It is possible to grasp and analyze the situation of Since not only event data representing a situation such as a fall but also history data representing a user's normal use situation can be acquired, the accuracy of analysis such as a fall can be improved by combining the two.

  Moreover, the portable reading device 40 stores the downloaded event data and the like as an encrypted data file, and does not have a function for decrypting it, so that the contents of the data cannot be displayed or changed. Therefore, until the encrypted data file is decrypted (decrypted) by the analysis device 42, there is no fear that the event data or the like will be inadvertently rewritten or a part of the data will be lost. The nature is extremely high.

  In the present embodiment, since the non-rewritable nonvolatile memory 35 such as EPROM is non-removably disposed on the circuit board of the ECU 18, the ECU 18 has strong protection against impact, heat, electrical noise, etc. Arranged at a strong crime prevention position designed not to be unnecessarily replaced, it is possible to prevent failure of the non-volatile memory 35 and unintentional removal, and event data etc. can be rewritten even in the in-vehicle state, There is no worry of being overwritten, and the credibility of the data is high in this respect. Further, it is possible to prevent the engine from being driven in a state where the nonvolatile memory 35 is removed from the ECU 18 for the purpose of not intentionally storing the fall information. In particular, the mirroring of event data is also advantageous for enhancing its credibility. The non-volatile memory 35 may be detachably attached to an ECU-based socket.

  Further, since event data and history data are read out through the portable reading device that is not mounted on the vehicle (motorcycle 1) as described above, there is no need to mount an information reading device on the vehicle side, and there are no vehicle parts. The increase in the number of points can be prevented and the mounting space can be used effectively. This is particularly effective in a saddle-ride type vehicle having a small vehicle body. In general, when an information reading device is mounted on a vehicle, it is necessary to take measures such as vibration, waterproofing, heat, and electromagnetic noise. However, as in this embodiment, the portable reading device 40 is separate from the vehicle. As a result, the structure can be simplified as compared with the case where the reading device is mounted on the vehicle, and the structure can be reduced.

  Furthermore, in the present embodiment, the EDR 20 is originally configured by using the calculation function of the ECU 18 that controls the operation of the motorcycle 1, which is advantageous for space saving and cost reduction. Further, the portable reading device 40 can also be configured at a relatively low cost by using an existing diagnostic tablet as hardware and installing a dedicated program therein. By allowing the portable reader 40 to be carried and used only by employees such as dealers, the credibility of event data and the like can be further enhanced.

(Other embodiments)
While various embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various improvements, changes, and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the EDR 20 is integrally configured using the ECU 18 of the motorcycle 1. However, the present invention is not limited thereto, and a necessary arithmetic circuit and the like are separately provided to provide an EDR separate from the ECU 18. It may be configured.

  In addition, the EDR 20 of the above-described embodiment is configured to start data recording with the determination of the overturn of the motorcycle 1 as a trigger, but the trigger may be generated based on other information such as determination of acceleration, A general method used for starting the EDR operation can be used.

  In the EDR 20 of the above-described embodiment, the nonvolatile memory 35 is configured by a non-rewritable semiconductor memory. However, a rewritable semiconductor memory may be used. In that case, when event data or history data is recorded in the nonvolatile memory 35 by the data output control unit 32 of the ECU 18, overwriting of the data may be prohibited.

  In the above-described embodiment, the portable recording device 40 is provided with the external recording medium mounting unit 40c, and the encrypted data file is stored in the external storage medium 41, and the encrypted information is transmitted to the analyzing device 42 via this. However, it is not limited to this. For example, the portable reading device 40 is not provided with the external recording medium mounting unit 40c, and has wired or wireless communication means, and transmits encrypted information to the analysis device 42 via a network such as the Internet or an intranet. You may do it. Further, the portable recording device 40 in which the encrypted data file is recorded in the internal memory may be brought into a facility where the analysis device 42 is located.

  The portable reading device 40 may include a power line for supplying power to the ECU 18 in addition to a signal line for exchanging information. As a result, electric power can be supplied to the ECU 18 from the power source mounted on the portable reading device 40, and event data, history data, and the like are necessary even when electric power cannot be supplied from the power source of the vehicle such as the motorcycle 1 to the ECU. Information can be acquired.

  Further, the portable reading device 40 encrypts identification information that can be used for identifying the motorcycle 1 (vehicle) together with event data, history data, and the like, thereby associating the vehicle identification information with the event data and the like. It is possible to memorize, and it is possible to smoothly analyze the fall situation. For example, recognition information such as an ECU model number, vehicle body number, model information, destination information, and commuting time may be given as vehicle identification information.

  In addition to event data, history data, and the like, the portable reading device 40 also encrypts identification information of the portable reading device 40 individually set in the portable reading device 40 together with the event data, thereby authenticating the information. Can be further enhanced. In addition to event data and history data, the portable reading device 40 also encrypts identification information set for each operator who has performed an information reading operation using the portable reading device 40 together with the event data, etc. The credibility of information can be further increased.

  Preferably, the portable reading device 40 can further enhance the credibility by encrypting the identification information of the ECU 18, the portable reading device 40, and the operator together with the event data and the history data. Further, when reading event data, history data, or the like using the portable reading device 40, the portable reading device 40 indicates that a start-up operation (lock release operation) such as password input that only a specific person authorized in advance knows has been operated. May recognize the information reading process.

  In the present embodiment, in the portable reading device 40 that has received event data, history data, and the like, the data is encrypted and written to the internal memory, and is also written to the external recording medium 41. In the portable reading device 40, the received data may be written in the internal memory as it is, and read from here and written in the external recording medium 41 or may be encrypted when transmitted to the analyzing device 42.

  Furthermore, in the EDR 20 of the above-described embodiment, the number of event data recording is limited, but this limitation may not be provided. Also, instead of recording both event data and history data, for the purpose of grasping and analyzing the situation when the motorcycle 1 falls, for example, event data is stored and history data is not stored. It may be. In this case, the recording capacity of the event data may be increased by the amount of the history data recording.

  Furthermore, the EDR 20 according to the present invention may be used for failure analysis of the motorcycle 1, for example, in addition to being used for analysis such as a fall as in the above-described embodiment, Or it can utilize also for various performance evaluations, such as a competition which competes for safe driving, and the usage is not limited.

  In the above-described embodiment, the motorcycle is described as an example. However, the EDR and the data reading system according to the present invention are not limited to the motorcycle, and are used for a personal watercraft (PWC) or a riding type rough terrain. It can also be applied to other vehicles having a weight that is difficult to transport, such as vehicles. The power source of the vehicle may be the engine E as in each of the above embodiments, an electric motor, or a hybrid type composed of both of them.

  As described above, since the vehicle information acquisition system according to the present invention can easily acquire EDR data and does not impair its credibility, it can be widely applied to vehicles that can demonstrate the significance of this effect. .

1 Motorcycle (vehicle)
18 ECU (controller for operation control)
35 Non-volatile memory 40 Portable reader 42 Analyzing device De Event data (information at the time of abnormality)
Dh history data (normal information)

Claims (7)

A non-volatile memory mounted on a vehicle and storing predetermined vehicle information relating to the vehicle;
A portable device that is not mounted on the vehicle and is portable for humans to read and encrypt the vehicle information when the vehicle information is abnormal from the non-volatile memory, and can output the encrypted information. A reader;
An analysis device that is not mounted on the vehicle, is configured separately from the portable reading device, and can decrypt the encrypted information output from the portable reading device and decrypt it into the vehicle information. ,
The vehicle information acquisition system , wherein the non-volatile memory is detachably attached to a circuit board of an ECU for operation control of the vehicle. In the non-volatile memory, not only the abnormal time information as the vehicle information but also normal time information related to the normal state of the vehicle is recorded,
The information acquisition system according to claim 1, wherein the portable reading device is configured to read and encrypt the abnormal time information from the nonvolatile memory and read the normal time information without encryption. . In the non-volatile memory, not only the abnormal time information as the vehicle information, but also normal time information relating to the normal state of the vehicle and identification information that can be used to identify the vehicle are recorded,
The normal time information is less recorded per hour than the abnormal time information,
In the non-volatile memory, a storage area for the normal time information and a storage area for the abnormal time information are set separately, and two storage areas for mirroring the abnormal time information are set . The information acquisition system according to claim 1 or 2. The ECU has an engine control program,
The information acquisition system according to claim 1 , wherein the portable reading device is configured to be able to change the engine control program . The vehicle is a motorcycle;
5. The ECU according to claim 1, wherein when the motorcycle is determined to fall, the ECU stops the engine of the motorcycle and records the abnormality information in the non-volatile memory so as not to be overwritten . The information acquisition system according to one. The information acquisition system according to any one of claims 1 to 5, wherein the abnormal time information is information given to the ECU or a calculation result of the ECU . In the portable reading device, an encryption program for encrypting the abnormal information read from the nonvolatile memory is installed, and a decryption program for decrypting the encrypted information into the abnormal information is not installed. The information acquisition system according to any one of claims 1 to 6.

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