JPH0950547A - Operation recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the capacity of a storage medium and to surely store traveling data by recording traveling data only when a vehicle is in a prescribed operation state based upon a signal detecting the operation state of the vehicle. SOLUTION: This operation recording device 20 starts operation at the time of detecting the ON/OFF of an ignition key 2, inputs and processes signals from various sensors such as an access opening sensor 4, a speed sensor 5 and a brake sensor 6, records the processed results as the data of a vehicle traveling state, and when a shock sensor (air bag operation sensor) 12 detects that an output level indicating the deceleration of the vehicle exceeds a prescribed value, stops its recording operation. Namely the device 20 switches its power supply to a backup power supply 18 at the time of detecting that an output level from the sensor 12 exceeds the prescribed value and stores the operation state of the vehicle for a fixed time before the instant of collision in a recording medium 16 such as an operation storage means and a RAM.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle motion storage device, and more particularly, to a driving recording device for recording a vehicle motion state during a certain time leading to an accident.

[0002]

2. Description of the Related Art In recent years, vehicle traffic accidents have tended to increase. In a traffic accident, it is estimated based on the testimony of the driver and the damage condition of the vehicle after the accident. The cause of the accident is analyzed with reference to, and it is difficult to grasp the exact situation. Therefore, it is conceivable to always store the driving state of the vehicle in the memory and perform the accident processing based on the stored contents.

[0003]

However, the capacity of the above-mentioned memory function is limited, and there are many points where the feasibility is lacking in terms of cost. A device is provided.

[0004]

In order to solve such a problem, the present invention provides an operating state detecting means for detecting an operating state of a vehicle and outputting a signal, and a signal output by the operating state detecting means. In a driving recording device comprising a recording means for recording as traveling data on a recording medium, the recording operation of the recording means is performed only when the vehicle is in a predetermined state based on the signal output by the operation state detecting means. It is characterized in that a recording restricting means for performing the operation is provided.

Further, when the recording limiting means detects that the vehicle is in a traveling state based on a predetermined signal output from the operating state detecting means, the recording limiting means starts the recording operation of the traveling data of the recording means, After that, when it is detected that the vehicle has collided, the recording operation of the traveling data of the recording means is ended, and only the traveling data from the start to the end is stored and held in the recording medium. And

Further, the recording limiting means includes a recording time setting means for setting a recording interval time from the recording timing of the traveling data to the next recording timing, and in the recording operation of the traveling data of the recording means, After storing the traveling data based on the recording interval time of the recording time setting means,
It is characterized in that the recording of the next traveling data is prohibited until the recording interval time elapses.

Further, when the recording restriction means determines that the difference in physical quantity between the plurality of travel data stored in the past by the storage means is smaller than a predetermined amount, at least one travel data among the travel data is traveled. It is characterized in that the storage of data is deleted. Also, the traveling data is
It is characterized in that the calendar data indicating the date and time is configured as a header.

Further, the calendar data is created on the basis of a timer indicating the date and time when the calendar is installed in the vehicle. Further, the recording medium is supplied with electric power from a vehicle battery as a power source, and a backup power source different from the battery is connected in parallel with the battery.

Further, the recording medium is provided with an external connection terminal, and the traveling data is output to the outside through the external connection terminal. Further, it is characterized by further comprising a judging means for comparing the traveling data stored in the recording medium with the preliminarily stored good driving judgment reference data, and judging the superiority or inferiority based on the comparison result.

Further, the judging means has a warning means for giving a warning according to the dangerous operation point to the driver of the vehicle when there is a dangerous operation point based on the comparison result. To do.

[0011]

According to the present invention by the above means, only the travel record data of the vehicle immediately before the accident necessary for the accident processing is provided, so that the data capacity can be restricted. Further, it is possible to compare the stored traveling record data with the excellent driving judgment reference data to judge the driving superiority or inferiority to the driver of the vehicle and to give a warning to the driver of the operation of the dangerous driving portion.

[0012]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. Reference numeral 1 denotes a timepiece, which is used as calendar data of the record data from the output of the timepiece device mounted on the mounted vehicle, the output of the timepiece function of another device, or the output of the timepiece function created by the operation recording device 20 itself. Reference numeral 2 denotes an ignition key (switch) for starting or stopping the engine, which detects ON-OFF of this switch to start the operation of the operation recording device 20.

A clutch ON-OFF sensor 3 detects whether the clutch is in an operating state or a non-operating state. Four
Is an accelerator opening sensor that detects the degree of depression of the accelerator. The accelerator pedal has a mechanism that opens and closes the throttle valve of the carburetor with a wire or the like. Therefore, it can be detected by the output signal from the opening sensor of the throttle valve.

A vehicle speed sensor 5 detects the electric signal (pulse signal) input to the speedometer and records the vehicle speed. A brake sensor 6 detects whether the brake is in an operating state or a non-operating state. For this detection, the ON-OFF state of the brake lamp switch is detected. A turn signal 7 is a sensor for detecting whether or not the turn signal has operated. This can be detected by checking whether or not a voltage is applied to the turn signal lamp circuit.

Reference numeral 8 is a sensor for detecting the gear position, which can be detected by utilizing an electric signal of a gear position display lamp displayed on the instrument panel from the transmission. It is also possible to input an electric signal from the EUC controlling the automatic transmission instead of the electric signal from the gear position indicating lamp.

Reference numeral 9 denotes a steering wheel angle detection sensor. When the steering wheel angle when traveling straight ahead is set to 0, a voltage of + potential is generated when the steering wheel is turned to the right, and a voltage of −potential is generated when the steering wheel is turned to the left, depending on the rotation angle. It is supposed to do. 10 is a sensor for detecting the ON-OFF of the light, such as a headlight, a side light,
It can be detected from a circuit such as a stop light. 11 is an ABS (Antilock Brake System)
m) Detects the operation of the controller and detects the operation and non-operation of the ABS device. When 12 detects that the output level indicating the deceleration of the vehicle detected by the impact sensor (airbag operation sensor) has reached a predetermined value or more,
The recording operation of the operation recording device 20 is stopped.

The above-mentioned various sensors are connected to the operation recording device 20, and signals from these sensors are input and processed, and recorded as data on the running state of the vehicle. 1
Reference numeral 3 is an input interface for performing a buffering operation or the like for connecting a sensor, which connects a digital sensor and a microcomputer, and also an analog sensor and an analog / digital converter (A / D converter). ) 14 is connected.

A microcomputer 14 receives a signal from a sensor and processes it, and controls a recording medium 16 such as an operation storage means and a RAM to store the traveling condition of the vehicle and record it as data. Reference numeral 17 denotes an output interface, which is used to read the output from the operation storage means and the recording medium 16 to an external device.
An output interface for connecting to the / O terminal 19 performs a buffer operation or the like. A backup power source 18 has a built-in power source for holding data when the vehicle engine is stopped or the power source is cut off due to an accident. Reference numeral 19 denotes an I / O terminal, which is a connector for reading data recorded on the recording medium 3.

Reference numeral 21 is a power switch, which is the same as the ignition key 2 described above, and the on-vehicle battery 22 is turned on.
-Turn off. In addition, a dedicated switch different from the ignition key 2 may be configured. Reference numeral 22 denotes an on-vehicle battery, and the normal operation recording device operates on the on-vehicle battery. However, when the power supply of the vehicle-mounted battery is cut off, the backup power supply 18 can hold the memory.

The electric signals from various sensors, for example, the vehicle speed sensor 5 outputs a pulse signal indicating the rotational speed of the wheel as a digital signal, and the accelerator opening sensor 4
The operation signal of is output as an analog signal. Therefore, the digital signal is directly input to the microcomputer 15, but the analog signal is converted into the digital signal through the A / D converter 14 and input to the microcomputer 15 for processing.

Next, a specific example of the input signal from each sensor will be described in detail with reference to the chart of FIG. FIG. 2 illustrates an example from when the vehicle discovers an object while the vehicle is running to when the vehicle collides with the object. That is, abc
Is a time axis, a-b is a free running time from the discovery of the object k until the initial operation is performed, and b-c is a chart diagram of signals from each sensor after the initial operation is performed. Things
Up to are the names of the sensors to which signals have been input. Finds the object k at point a by braking,
When the brake is applied at point b, it collides with the object k at point c and the speed becomes 0 km / h. During this time, the slip marks of the brakes remain on the vehicle where the ABS is not installed at the points where the wheels are fixed by the brakes. However, in the case of a vehicle equipped with ABS, the brakes are intermittently applied by the operation of the ABS, so that almost no trace of the brake remains.

The speed of the vehicle is recorded. Although the vehicle was traveling at a speed of 100 km / h at the point a, the object k was found, the brake was depressed at the point b, and the speed decreased, and 40 km at the point c. / H slowed down but collided with object k and reached 0
It became km / h. Represents the operation of the ABS device, and the braking and releasing operations are repeated from the point b when the brake is depressed to prevent the wheels from being fixed.

[0023] represents the trajectory of the steering wheel operation. That is, at point a, the vehicle was traveling straight ahead, but at point b, the brake was operated and the steering wheel turned to the left. After a while, the steering wheel was repeatedly moved to the right and left, and at point c (during a collision). It shows that the driver has stopped by turning the steering wheel to the right. Indicates whether the light was on. Here, the light is in a non-illuminated state. Indicates whether the winker was working. In this case, the blinker is operated immediately before the point c.

Represents the gear position of the transmission of the automatic vehicle. At the point a, the gear range is downshifted to the first speed because the gear is in the drive range gear position, and the brake is applied at the point b. Has arrived. Indicates the status of the memory operation. That is, the recording operation is started by turning on the ignition switch, and the recording operation is stopped at the point c which collides with the object k to hold the recording. Shows the power supply operation of the operation recording device, and the battery installed in the vehicle is used as the power supply during normal traveling, but it is confirmed that the output level from the impact sensor exceeds a predetermined value due to the impact of the collision. Detect (point c)
Then, the power source is switched to the backup power source in order to end the recording operation of the traveling data to the operation recording means and store and retain only the traveling data from the start to the end in the operation recording means.

As described above, in the operation recording apparatus of the present embodiment, the operation recording apparatus reverses from the moment of the collision to the past and stores and holds the operation state of the vehicle for a certain period of time, and the data thereof is shown in FIG. It can be read from the I / O 19 shown in and reproduced. Next, the processing operation of the microcomputer 15 of this embodiment will be described with reference to the flowcharts of FIGS. The processing operation of the microcomputer 15 is started by, for example, turning on the ignition key 2 of the vehicle (or turning on the power of the device).

In step S1, initial setting is performed. That is, in order to clear the conventional memory (recording medium) and use the calendar data as a header, the input from the clock 1 is set and the process proceeds to step S2. However, the traveling data from the time when the ignition key 2 is turned on to the collision is still held. In step S2, ignition key 2
It is detected whether or not is ON, and if the ignition key 2 is ON, the process proceeds to step S3. If the ignition key 2 is off, the process returns to step S2 and waits until the ignition key 2 is turned on.

In step S3, it is detected whether or not the input of the shock sensor is a predetermined value, and if the input signal from the shock sensor is more than the predetermined value, the process proceeds to step S4 and the memory recording is stopped. Then, the travel data so far is held and the process returns to step S2. When the level of the input signal of the impact sensor is less than the predetermined value, step S5
Then, it is detected whether the recording step time has passed 1 minute. The recording step time is not limited to 1 minute and is for timing. For example, recording can be performed in units of 1 sec and can be changed in units of 2, 5, 10, 60 sec.

Therefore, if the predetermined time has elapsed, the process proceeds to step S6. If not, the process returns to step S3 and waits until the predetermined time elapses. In step S6, it is detected whether or not the recording memory address is the final address, and if it is the final address, the process proceeds to step S7. Step S6
If the recording memory address is not the final address in step S,
Moving to 8, memory recording is started. In step S7, since the recording memory address is the last address, the address is set so as to be the first address, and the process proceeds to step S8 to start memory recording.

Next, referring to FIG. 4, in step S9, the variation of each data is checked, and the process proceeds to step S10. In step S10, it is compared with the data one address before and it is checked whether they are the same, and if they are the same, step S12
Move to. If the data is not the same as the data one address before, the data is recorded in a new address in step S11, and the process proceeds to step S13.

In step S12, the data one address before is overwritten and recorded, and the flow advances to step S13. Step S
In 13, it is detected whether or not there is an input to the data output command switch, and if there is an input, the process returns to step S14, and if there is no input, the process returns to step S2. In step S14, data is output from the oldest clock calendar data, which is the header, and the process proceeds to step S15 to confirm the completion of output. If the output is not completed, the data is output until the output is completed. When the output is completed, the process returns to step S2 to complete the processing operation and wait for the next processing.

As described above, according to this embodiment, when it is detected that the ignition key of the vehicle is turned on, the operation storage means operates, and the recording interval changing means that can change the recording time interval operates. To do. For example, an interval of 1 sec can be recorded at an interval of 3 sec. Further, in steps S9 to S12, when the recorded data is used as a reference and the monitoring program means for constantly monitoring the variation of the data operates to detect that the variation difference of the data is small, the start point of the data having the reduced variation difference is detected. Leaving the end point,
The recording effective memory amount can be increased by deleting the data on the way.

Further, in steps S13 to S15, the data stored in the driving recording device can be read by the external connection terminal, and the situation of the vehicle running can be reversed and read and analyzed as data. It is possible. Next, the data address for starting memory recording in step S8 of FIG. 3 will be described with reference to FIG.

The data addresses of the data to be recorded are calendar data 4 bits, vehicle speed data 8 bits, steering (steering wheel rotation angle) sensor 8 bits, accelerator opening data 4 bits, ABS controller data 8bi.
t, gear position data (lock-up gear position in the case of an AT vehicle) 3 bits, turn signal data 2 bit, brake data 1 bit, clutch data 1 bit, light data 1 bit, dangerous bit data 3 bit, data ENDb
Addresses are determined and recorded in the order of it2bit.
The frame from the calendar data to the data END is one frame, and the interval of each frame can be arbitrarily set by the storage time setting means.

Further, when it is determined that the difference in physical quantity between a plurality of one-frame running data stored in the past by the storage means is smaller than a predetermined amount, at least one frame of each one-frame running data is determined. It is possible to increase the effective recording memory amount by deleting the recording of the traveling data of. That is, the diagram shown in FIG. 6 shows each one frame from the start of recording to the 20th frame, and for example, (1) to (6)
The data up to the frame is stored at intervals of 1 sec. From (3) to (5), it is judged that there is little change in the entire contents of one frame data, and the data record is deleted. In (15) and (16), the same record is deleted. Further, during (6), (9), and (12), the recording time is varied, and the time interval between frames is 3 sec.

Assuming that a collision occurs within 20 seconds after starting the recording, the recording is stopped at the frame (20), but the date and time, the time, the change in vehicle speed, the steering operation status up to 20 seconds before the collision, Collision such as accelerator pedal depression status, ABS device control status, gear switching status, blinker output, brake control status, clutch status, blinking lights, and how many dangerous points there are The driving operation status of the car can be read out as data.

In this example, basically, the ignition key O
When no accident such as a collision occurs from N (start of driving), the ignition key is turned off and the power of the recording apparatus is turned off (end of driving), and the traveling data during this period is deleted. As described above, only the data before the collision is retained. Alternatively, by increasing the time interval and deleting the recorded data or the previous data when there is no change, the capacity for recording the traveling data can be saved. Further, since the calendar data is created from the clock provided originally, the configuration is simplified. Furthermore, since the power supply is backed up, the data after the accident can be reliably recorded. Although the running state is detected by the ignition key in this example, the present invention is not limited to this, and may be detected based on a vehicle speed sensor or an engine speed sensor. or,
Although the collision of the vehicle is detected by the impact sensor, it may be performed by image processing.

Next, in the case where there is a dangerous maneuvering point, the operation of the microcomputer 15 in the case of a warning means capable of giving a warning to the driver of the vehicle of the operation of the dangerous maneuvering point, the flowchart of FIG. Will be described. The processing operation of the microcomputer 15 starts when it is detected that the ignition key of the vehicle is turned on.

In step S31, it is detected whether or not there is a large change in the data of the steering sensor. When it is detected that the fluctuation is large, the process proceeds to step S33, the dangerous bit 1 is set, and the process proceeds to step S34. When it is detected in step S31 that the data of the steering sensor does not significantly change, the process proceeds to step S32, the dangerous bit 1 is canceled, and the process proceeds to step S34.
Move on to.

In step S34, it is detected whether or not the accelerator data has changed. When a change is detected, the process proceeds to step S36, the dangerous bit 2 is set, and the process proceeds to step S37. When it is detected in step S34 that there is no change in the accelerator data, the dangerous bit 2 is released in step S35, and the process proceeds to step S37. Step S
At 37, it is detected whether or not there is a large change in the speed data. When a large fluctuation is detected, step S3
In step 9, the dangerous bit 3 is set, and the process proceeds to step S40. When there is no significant change in speed data, dangerous bit
Release 3 and move to step S40. In step S40, it is detected whether one dangerous bit is set,
When the number of dangerous bits is set, step S4
In step 2, a short warning sound (beep) is generated and the process is completed.

If two or more dangerous bits are set in step S40, the process proceeds to step S41 and it is detected that two or more dangerous bits are set in step S43.
Generates a long warning sound with and completes the process. Further, when there are no more than two in step S41 (no single dangerous bit is set), the generation of the warning sound is canceled in step S44 and the process is completed. Note that the above-described fluctuation amount corresponds to the fluctuation amount in the case of excellent driving, and is a value commensurate with detection of sudden steering, sudden start, and sudden acceleration.

In this way, the data from the steering sensor, the data from the accelerator opening sensor, and the change in the speed data are compared, and when there is a large change and it is considered dangerous, a dangerous bit is set and set short. Warning sound or danger b
If a large number of it are set and it is determined that the driving situation is extremely dangerous, a long warning sound is generated and the driver is warned by a warning sound and voice synthesis so that the driver can drive safely. It is possible to improve the function by performing the above function together with the driving record.

[0042]

As described above, according to the present invention, when the driving state of the vehicle is recorded as data, only the operation state up to the collision required for accident handling is recorded, so the capacity of the recording medium is saved. it can. In addition, the traveling data can be surely held without wasteful cost increase. In addition, each time data that is considered dangerous for driving operation is entered, the driver is alerted by a warning sound and voice synthesis so that the driver can drive safely, which contributes to safe driving of the vehicle. A practical operation recording device can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a time chart diagram showing sensor data according to the present invention.

FIG. 3 is a flowchart A showing the processing operation of the microcomputer 15.

FIG. 4 is a flowchart B showing the processing operation of the microcomputer 15.

FIG. 5 is a data layout diagram showing the structure of stored data.

FIG. 6 is a diagram showing the structure and permutation of stored data.

FIG. 7 is a flowchart showing a processing operation of a warning operation of the microcomputer 15.

[Explanation of symbols]

 1-Clock 2 Ignition key 3-Clutch sensor 4-Accelerator opening sensor 5-Vehicle speed sensor 6- ... Brake sensor 7 --- Winker sensor 8 --- Gear position sensor

Claims (10)

[Claims] 1. An operation recording apparatus comprising: an operating state detecting means for detecting an operating state of a vehicle and outputting a signal; and a recording means for recording a signal output by the operating state detecting means as traveling data on a recording medium. In the driving recording apparatus, there is provided recording limiting means for causing the recording operation of the recording means to be performed only when the vehicle is in a predetermined state based on the signal output from the operating state detecting means. 2. The recording limiting means starts the recording operation of the traveling data of the recording means when it detects that the vehicle is in a traveling state based on a predetermined signal output from the operation state detecting means, After that, when it is detected that the vehicle has collided, the recording operation of the traveling data of the recording means is ended, and only the traveling data from the start to the end is stored and held in the recording medium. The operation recording device according to claim 1. 3. The recording limiting means comprises recording time setting means for setting a recording interval time from the recording timing of the traveling data to the next recording timing, and in the traveling data recording operation of the recording means, 2. The operation record according to claim 1, wherein, based on the recording interval time of the recording time setting means, after the traveling data is stored, the recording of the next traveling data is prohibited until the recording interval time elapses. apparatus. 4. When the recording restriction unit determines that a difference in physical quantity between a plurality of travel data stored in the past by the storage unit is smaller than a predetermined amount, at least one of the travel data is traveled. The operation recording apparatus according to claim 1, wherein the storage of data is deleted. 5. The operation recording apparatus according to claim 1, wherein the travel data is configured with calendar data indicating a date and time as a header. 6. The operation recording apparatus according to claim 5, wherein the calendar data is created based on a timer indicating a date and time when the calendar is installed in the vehicle. 7. The drive according to claim 1, wherein the recording medium is supplied with electric power from a vehicle battery as a power source, and a backup power source different from the battery is connected in parallel with the battery. Recording device. 8. The operation recording apparatus according to claim 1, wherein the recording medium is provided with an external connection terminal, and the travel data is output to the outside via the external connection terminal. 9. The traveling data stored in the recording medium is compared with preliminarily stored good driving determination reference data,
The operation recording apparatus according to claim 1, further comprising a determination unit that determines superiority or inferiority based on a comparison result. 10. The determination means includes warning means for giving a warning according to the dangerous operation point to a driver of the vehicle when there is a dangerous operation point based on the comparison result. The operation recording device according to claim 9.