JP5934499B2 - Vehicle data recording device - Google Patents

Description

  The present invention relates to a vehicle behavior detection device and a vehicle data recording device that detect an abnormal behavior of a vehicle, and more particularly to a technique for detecting a behavior based on acceleration of the vehicle.

  For example, a vehicle data recording device such as a drive recorder is known as a device for recording automatically acquired data when an abnormal behavior occurs in the vehicle. This type of drive recorder can record data such as images obtained by photographing with an in-vehicle camera for a predetermined time when a traffic accident occurs or when a situation similar to that occurs. Further, a general drive recorder detects the magnitude of acceleration applied to the vehicle, and generates a trigger signal for starting recording when the detected acceleration exceeds a set threshold value and is regarded as occurrence of an abnormality. .

  As conventional techniques related to such a drive recorder, for example, techniques disclosed in Patent Document 1 and Patent Document 2 are known.

  Patent Document 1 proposes a technique for preserving an unnatural traveling state generated in a vehicle before a collision in a vehicle data recording apparatus. Further, in Patent Document 1, since the tire is likely to lock or slip when the road surface is frozen or during rain, the threshold value for determining the abnormal wheel state based on the acceleration and the number of vehicle speed pulses is appropriately changed. Suggests that. Furthermore, on roads that are not paved, the threshold for determining abnormal wheel conditions based on acceleration and the number of vehicle speed pulses can be changed as appropriate. This suggests that the threshold for determining that there is a change is appropriately changed.

  Patent Document 2 proposes a technology of a drive recorder utilization device that can improve safety. Specifically, if a sudden handle occurs while the vehicle is running, data indicating the point where the sudden handle occurred, data indicating that the surrounding area of the vehicle is in a rainy condition, data indicating that the vehicle is at night, It discloses that data indicating the traveling speed of a vehicle is recorded in a memory. In addition, it is disclosed that when a raindrop is detected by the raindrop sensor, it recognizes that the surrounding area of the vehicle is in a rainy state, and when no raindrop is detected by the raindrop sensor, it recognizes that the surrounding area of the vehicle is not in a rainy state. doing.

JP 2008-217703 A JP 2007-1953577 A

  By the way, in an in-vehicle data recording device such as a drive recorder, if a dangerous situation occurs to some extent, not only the occurrence of an accident, but if data such as an image is acquired and automatically recorded, the analysis of the driving situation and safety Data useful for driving guidance can be obtained. For example, data having high utility value can be obtained when abnormal behavior such as sudden deceleration or sudden acceleration occurs.

  In order to detect a behavior such as sudden deceleration or sudden acceleration of the vehicle, it is only necessary to identify whether or not the acceleration is abnormal by comparing the magnitude of the acceleration with a predetermined threshold value. However, for example, since the road surface is slippery when it rains, even if it is actually dangerous, only a small acceleration is detected compared to when it is fine, and there is a situation in which no data is recorded because it is not recognized as abnormal.

  In other words, even when the brake pedal is depressed relatively strongly, the vehicle speed decreases slowly due to the occurrence of slip at the time of rain, so that a large acceleration that can be regarded as sudden deceleration is not detected. Even if the accelerator pedal is depressed relatively strongly, the vehicle speed increases moderately due to the occurrence of slip during rain, so that a large acceleration that can be regarded as sudden acceleration is not detected.

  Therefore, as mentioned in Patent Document 1, when a slip is likely to occur, it is assumed that the threshold for determining the abnormal state is appropriately changed. Further, as disclosed in Patent Document 2, when a raindrop is detected by a raindrop sensor, it is recognized that the vicinity of the vehicle is in a rain condition, and when no raindrop is detected by the raindrop sensor, It is assumed to recognize that there is no rainfall.

  However, the actual situation is that the detection status of the raindrop sensor and the operation status of the wiper do not always match the actual slipperiness of the road surface. For example, even when it is not raining, the wiper may be temporarily activated at the driver's will in order to wipe out dirty windows. Further, in a situation where it rains for only a short time and does not rain thereafter, the wiper is moved once or several times. In such a case, the wiper operates, but the road surface is almost not wet, so that the slipperiness is the same as in fine weather.

  In addition, for example, even if the rainy state continues, the wiper temporarily stops when the running vehicle enters the tunnel from the normal road, but when this vehicle leaves the tunnel after a while, The wiper will be activated again. Therefore, if the device that detects acceleration is recognized as not raining in the tunnel based on the wiper's operating conditions, etc., the road surface changes to a slippery state when the vehicle leaves the tunnel. However, it is difficult to switch the threshold quickly in response to this change. However, since a dangerous situation tends to occur at the exit of the tunnel, it is desirable that data on the dangerous situation can be reliably recorded even in the vicinity of the exit of the tunnel at the time of rainfall.

The present invention has been made in view of the above circumstances, an object thereof is to provide a data recording apparatus for Yakuritsu one vehicle to reliably record data dangerous situation in the vehicle.

In order to achieve the above-described object, the vehicle behavior detection apparatus according to the present invention is characterized by the following (1) to (2).
(1) A vehicle behavior detection device that is mounted on a vehicle and detects an abnormal behavior based on acceleration of the vehicle,
A wiper signal input unit for inputting a signal related to an operation status of a wiper mechanism for wiping the window of the vehicle, or a signal related to a raindrop detection status in the vehicle, as a wiper signal;
An acceleration detector for detecting the magnitude of acceleration in the vehicle;
An acceleration comparison unit that compares the magnitude of the acceleration detected by the acceleration detection unit with a threshold value and outputs a comparison result;
When the length of time that the wiper signal maintains the same state is a predetermined time or more, one threshold value selected from a plurality of threshold values is given to the acceleration comparison unit according to the state of the wiper signal. And an automatic threshold switching unit.
(2) The vehicle behavior detection device according to (1) above,
The automatic threshold value switching unit selects a first threshold value corresponding to a rainy weather condition when a state corresponding to the wiper signal during the operation of the wiper continues for a predetermined first time or more,
In the state where the first threshold value is selected, the automatic threshold value switching unit, when the state corresponding to the wiper signal being stopped when the wiper is stopped continues for a second time longer than the first time. Selecting a second threshold corresponding to the state;

According to the vehicle behavior detection device having the configuration (1), since the threshold selection state is not changed in a situation where the wiper signal frequently changes, an inappropriate threshold selection change can be prevented, which is dangerous. It becomes possible to accurately identify the situation.
According to the vehicle behavior detection device having the configuration (2), the case where the threshold value to be selected is switched from the first threshold value to the second threshold value and the case where the threshold value is switched from the second threshold value to the first threshold value are identified. Since the length of time used for the change is changed, a more appropriate threshold value can be selected. For example, even if the wiper temporarily stops in the tunnel when it rains, the selection of the first threshold value in the rainy condition is maintained, so if a dangerous situation occurs near the tunnel exit, the vehicle at that time immediately Can be detected.

In order to achieve the above-described object, a vehicle data recording apparatus according to the present invention is characterized by the following (3).
(3) A vehicle data recording device that is mounted on a vehicle and acquires predetermined data and records data when an abnormal behavior is detected based on the acceleration of the vehicle,
A wiper signal input unit for inputting a signal related to an operation status of a wiper mechanism for wiping the window of the vehicle, or a signal related to a raindrop detection status in the vehicle, as a wiper signal;
An acceleration detector for detecting the magnitude of acceleration in the vehicle;
An acceleration comparison unit that compares the magnitude of the acceleration detected by the acceleration detection unit with a threshold and outputs an abnormal signal when the acceleration exceeds the threshold;
An automatic threshold value switching unit that switches the threshold value given to the acceleration comparison unit to a single threshold value selected according to the state of the wiper signal from a plurality of threshold values;
A signal processing unit for generating vehicle speed information from a signal acquired from a vehicle speed sensor of the vehicle, and generating recordable image data from a video signal acquired from an in-vehicle camera mounted on the vehicle;
A data recording unit for recording the vehicle speed information and image data output from the signal processing unit;
With
The automatic threshold value switching unit corresponds to a heavy rain when the wiper operating speed is equal to or higher than a predetermined speed when a state corresponding to the wiper signal during the wiper operation continues for a predetermined first time or more. A first threshold value is selected, and when the operating speed of the wiper is less than the predetermined speed, a second threshold value greater than the first threshold value corresponding to a normal rain condition is selected, and the first threshold value or the first threshold value is selected . In a state in which the threshold value of 2 is selected, the second threshold value corresponding to a clear sky state when the state corresponding to the wiper signal being stopped when the wiper is stopped continues for a second time longer than the first time. Select a third threshold value that is greater ,
The data recording unit constantly records the vehicle speed information and image data output from the signal processing unit while updating the data until the acceleration comparison unit outputs the abnormal signal, and records the acceleration. When the comparison unit outputs the abnormal signal, the updating of the data for the predetermined time is stopped and the data is stored, and the vehicle speed information and the image data output from the signal processing unit are passed over a predetermined time. To record.

  According to the vehicular data recording apparatus having the configuration (3), since the threshold selection state is not changed in a situation where the wiper signal changes frequently, an inappropriate threshold selection change can be prevented, which is dangerous. It becomes possible to accurately identify whether or not the situation is present, and it is possible to reliably record dangerous situation data in the vehicle.

Vehicular data recording apparatus of the present invention can be useful in order to reliably record data dangerous situation in the vehicle. That is, since the selection state of the threshold value is not changed in a situation where the wiper signal frequently changes, it is possible to prevent an inappropriate change of the threshold value selection, and it is possible to accurately identify whether or not the situation is dangerous. It is possible to reliably record dangerous situation data.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating a configuration example of a vehicle data recording apparatus according to an embodiment. FIG. 2 is a flowchart showing main operations of the apparatus shown in FIG.

  Specific embodiments of the vehicle behavior detection device and the vehicle data recording device of the present invention will be described below with reference to the drawings.

<Device configuration>
A configuration example of the vehicle data recording apparatus 100 of the present embodiment is shown in FIG. The vehicle data recording apparatus 100 shown in FIG. 1 is mounted on a vehicle in the same manner as a general drive recorder, and is obtained by photographing when a dangerous situation such as sudden acceleration, sudden deceleration, or a traffic accident occurs. It has a function to automatically record and save data.

  The main part of the vehicle data recording apparatus 100 shown in FIG. 1 is configured as a drive recorder main body 110, and is connected to various elements mounted on the vehicle. That is, the wiper control unit 123, the acceleration sensor 131, the vehicle speed sensor 132, and the in-vehicle camera 133 on the vehicle are each connected to the drive recorder main body 110.

  The wiper control unit 123 gives a drive signal to the wiper drive mechanism 124 that drives the wiper that wipes the surface of the front windshield (front glass) corresponding to the window. In the wiper control unit 123 of the present embodiment, a wiper operation unit 121 having various switches that can be operated by the driver, and a raindrop sensor 122 are connected to the wiper control unit 123. That is, the wiper control unit 123 outputs a wiper drive signal in accordance with the driver's switch operation or raindrop detection by the raindrop sensor 122. Further, the wiper control unit 123 outputs a wiper signal SG1 indicating the operation state (ON / OFF) of the wiper.

  The acceleration sensor 131 outputs an acceleration signal SG2 indicating the magnitude of acceleration applied in the front-rear direction of the traveling direction of the vehicle. The vehicle speed sensor 132 is disposed in the transmission of the vehicle and outputs a pulse signal (vehicle speed pulse) every time the output shaft of the transmission rotates by a predetermined amount. Based on the period and the number of pulses of the vehicle speed pulse output from the vehicle speed sensor 132, it is possible to grasp the vehicle speed and the travel distance by calculation.

  The in-vehicle camera 133 has a built-in image pickup unit including a two-dimensional CCD image pickup device and the like, and can continuously or intermittently shoot a shooting object in a predetermined direction and output an electric signal of the shot video. it can. This in-vehicle camera 133 is fixed on the vehicle with the shooting direction facing in a direction in which the scenery in front of the traveling direction of the vehicle or the driver inside the vehicle can be seen.

  In this embodiment, it is assumed that only a single in-vehicle camera 133 is used. However, an in-vehicle camera that captures the scenery outside the vehicle and an in-vehicle camera that captures the interior of the car are provided, and an image showing the scenery outside the vehicle is provided. It is also possible to make a configuration so that both a video showing the situation inside the vehicle can be recorded simultaneously.

  The drive recorder main body 110 includes a wiper signal input unit 111, an automatic threshold switching unit 112, a clock circuit 115, an acceleration detection unit 116, an acceleration comparison unit 117, a signal processing unit 118, and a data recording unit 119. The automatic threshold value switching unit 112 includes a clear weather / rainy weather identification unit 113 and a threshold value selection unit 114.

  The wiper signal input unit 111 inputs the wiper signal SG1 output from the above-described wiper control unit 123, and converts the format of voltage or the like into an electrical signal suitable for processing inside the drive recorder main body 110.

  The automatic threshold value switching unit 112 has a function of automatically switching a threshold value necessary for identifying rapid acceleration and sudden deceleration to an appropriate threshold value depending on the situation. That is, the clear weather / rainy weather identification unit 113 identifies the clear weather state or the rainy weather state based on the state and time of the wiper signal SG1 output from the wiper control unit 123, and selects a selection control signal corresponding to the identification result as a threshold value. Part 114. The threshold selection unit 114 selects either the rainy weather threshold THL or the sunny weather threshold THH according to the selection control signal input from the clear weather / rainy weather identification unit 113. The rainy weather threshold THL and the clear weather threshold THH are constants determined in advance, and are (| THH |> | THL |).

  The clock circuit 115 can output information representing the current date and time (hour, minute, second) by constantly counting a predetermined clock pulse whose cycle is stable. Moreover, the elapsed time from a certain time can also be measured.

  The acceleration detection unit 116 receives the acceleration signal SG2 output from the acceleration sensor 131, performs processing such as A / D conversion, and converts it into a digital signal suitable for processing inside the drive recorder main body 110.

  The acceleration comparison unit 117 generates a recording start trigger based on the result of comparing the magnitude of the detected acceleration (output of the acceleration detection unit 116) and the threshold value (THL or THH) output from the threshold selection unit 114. Generate. The recording start trigger is output from the acceleration comparison unit 117 and input to the data recording unit 119.

  The signal processing unit 118 inputs vehicle speed pulses output from the vehicle speed sensor 132 to generate information representing the current vehicle speed, or inputs video signals output from the in-vehicle camera 133 to record digital image data that can be recorded. It has a function to generate.

  The data recording unit 119 collects necessary data over a predetermined time on the basis of the timing when the recording start trigger output from the acceleration comparison unit 117 is generated, and records the collected data on the memory card 134. . The data to be recorded includes image data obtained by photographing with the in-vehicle camera 133, vehicle speed information calculated from the vehicle speed pulse of the vehicle speed sensor 132, current date information output from the clock circuit 115, and the like.

  The memory card 134 is configured by a non-volatile memory, and can store stored data even when the supply of power is stopped. The drive recorder main body 110 is provided with a slot (not shown) for mounting the memory card 134, and the memory card 134 is detachable.

  Note that the data recording unit 119 constantly records, for example, a short time of about 20 seconds in a predetermined area regardless of the recording start trigger. Therefore, data obtained from 20 seconds before the recording start trigger to the present can be stored in the memory card 134 according to the recording start trigger.

  In a practical configuration, each component such as the automatic threshold value switching unit 112, the acceleration comparison unit 117, the signal processing unit 118, and the data recording unit 119 shown in FIG. 1 is an electric circuit mainly composed of a microcomputer. It is assumed to be realized. That is, various functions required by the microcomputer executing a predetermined program are realized.

<Operation of the device>
The main operation of the apparatus shown in FIG. 1 is shown in FIG. This operation is performed, for example, when a microcomputer that realizes each function of the drive recorder main body 110 executes a program. The operation of FIG. 2 will be described below.

  When the ignition switch of the vehicle equipped with the drive recorder main body 110 is turned on and the power of the drive recorder main body 110 is turned on, the apparatus itself is initialized in step S10. As a result, for example, a flag F1 for distinguishing between clear / rainy conditions is initialized to a “clear sky” state, and the threshold value selection unit 114 selects the threshold value THH for clear weather and gives it to the acceleration comparison unit 117.

  In step S11, the clear weather / rainy weather identification unit 113 identifies the current state of the flag F1. If the flag F1 is in the “fine weather” state, the process proceeds to the next S12. If the flag F1 is in the “rainy” state, the process proceeds to S17.

  In step S12, the clear weather / rainy weather identification unit 113 refers to the state of the wiper signal SG1 input from the wiper signal input unit 111, and identifies on / off. If the wiper signal SG1 is in the ON state, the process proceeds to S13, and if it is in the OFF state, the process proceeds to S22.

  In step S13, the fine weather / rainy weather identification unit 113 measures the length of time during which the wiper signal SG1 has been kept on since the wiper signal SG1 was switched from off to on (continuation time Ton). For example, the duration Ton can be measured as the difference between the time of the clock circuit 115 when the wiper signal SG1 is turned on and the current time.

  In step S14, the fine weather / rainy weather identification unit 113 compares the duration time Ton measured in step S13 with a predetermined time threshold value T1. As a specific example, it is assumed that the time threshold T1 is set to 1 minute. If the condition (Ton ≧ T1) is satisfied, the process proceeds to S15, and if this condition is not satisfied, the process proceeds to S22.

  In step S15, the clear weather / rainy weather identification unit 113 regards the current state as “rainy” and sets the flag F1 to “rainy”. In the next step S16, since the current state is “rainy”, the threshold selection unit 114 selects the rain threshold THL as the acceleration threshold, and provides the rain threshold THL to the input of the acceleration comparison unit 117.

  In step S17, the clear / rainy weather identification unit 113 refers to the state of the wiper signal SG1 input from the wiper signal input unit 111, and identifies on / off. If the wiper signal SG1 is off, the process proceeds to S18, and if it is on, the process proceeds to S22.

  In step S18, the clear weather / rainy weather identification unit 113 measures the length of time (continuation time Toff) that the wiper signal SG1 is maintained from the on state to the off state until the present time. For example, the duration Toff can be measured as the difference between the time of the clock circuit 115 when the wiper signal SG1 is switched off and the current time.

  In step S19, the fine weather / rainy weather identification unit 113 compares the duration Toff measured in step S18 with a predetermined time threshold T2. As a specific example, it is assumed that the time threshold T2 is set to 30 minutes. If the condition of (Toff ≧ T2) is satisfied, the process proceeds to S20, and if this condition is not satisfied, the process proceeds to S22.

  In step S20, the clear weather / rainy weather identification unit 113 regards the current state as “clear weather” and sets the flag F1 to “clear weather”. In the next step S21, since the current state is “sunny”, the threshold selection unit 114 selects the clear sky threshold THH as the acceleration threshold, and provides the clear sky threshold THH to the input of the acceleration comparison unit 117.

  In step S22, the acceleration comparison unit 117 compares the magnitude (detected acceleration) of the acceleration signal SG2 input from the acceleration detection unit 116 with the threshold value (THH or THL) input from the threshold selection unit 114. If the condition (detected acceleration> threshold) is satisfied, the process proceeds to the next S23, and if this condition is not satisfied, the process returns to S11.

  In step S <b> 23, the acceleration comparison unit 117 generates a predetermined recording start trigger and applies this recording start trigger to the data recording unit 119. The data recording unit 119 considers that the behavior of the vehicle representing a dangerous state when a recording start trigger is input, that is, a sudden acceleration or a sudden deceleration exceeding a predetermined value occurs, and stores data related to this event for a predetermined time. Record on the card 134. In other words, image data obtained by photographing by the in-vehicle camera 133, vehicle speed information corresponding to the vehicle speed pulse output by the vehicle speed sensor 132, date and time information output by the clock circuit 115, and the like are automatically displayed as data representing a dangerous state. Record.

<Description of the advantages of the device>
In the above-described vehicular data recording apparatus 100, the automatic threshold value switching unit 112 automatically identifies a clear / rainy condition. In addition, the threshold (THH / THL) used when identifying whether the detected acceleration is in a dangerous state is automatically switched according to the state of fine weather / rainy weather.

  In other words, the road surface is more slippery in rainy weather than in clear weather, so that there is a high possibility that only acceleration with a relatively small absolute value will be detected even in the case of dangerous sudden deceleration or rapid acceleration. Therefore, in the case of rainy weather, a dangerous state can be reliably detected by switching to a threshold value (THL) having a smaller absolute value than the threshold value (THH) in fine weather.

  However, for example, in a situation where the wiper is moved only once or a few times, the road surface is almost wet and it is difficult for the wheels to slip. Therefore, if the acceleration threshold is reduced, it is dangerous even if it is not dangerous. Recognizing that there is a high possibility of recording useless data with low utility value.

  However, in the operation shown in FIG. 2, unless the duration Ton of the ON state of the wiper signal SG1 is equal to or longer than T1 (1 minute), the “sunny” state is not switched to the “rainy” state, so the road surface is difficult to slip. In some situations, the acceleration threshold can be maintained at a normal large threshold (THH).

  Also, when the rainy state continues, if the vehicle enters the tunnel, the wiper will temporarily stop, so the device mistakenly recognizes that it was in a “clear sky” state, and the acceleration threshold is usually large There is a possibility to switch to a value. However, in practice, the rainy condition continues, and the road surface becomes slippery at the moment of exiting the tunnel. If the acceleration threshold is large at this time, there is a possibility that a dangerous state cannot be detected.

  However, in the operation shown in FIG. 2, unless the duration Toff of the wiper signal SG1 in the off state is T2 (30 minutes) or more, the “rainy” state is not switched to the “sunny” state. Even if the wiper is temporarily stopped by, for example, the acceleration threshold value can be maintained at a small threshold value (THL).

<Possibility of device deformation>
In the vehicle data recording apparatus 100 shown in FIG. 1, the wiper signal SG <b> 1 is extracted from the wiper control unit 123 that controls the wiper drive mechanism 124 and is input to the drive recorder main body 110. However, as a signal input to the drive recorder main body 110, a signal indicating the on / off state of each switch of the wiper operation unit 121 may be used instead of the wiper signal SG1, or a signal output from the raindrop sensor 122 is used. Alternatively, a signal for controlling the wiper driving mechanism 124 may be used.

  1 is assumed to select one of two types of threshold values (THH / THL), but may be changed so that three or more types of threshold values can be selected. . For example, by distinguishing the magnitude of the operation speed of the wiper, normal rain and heavy rain can be distinguished. Since the road surface is more slippery in heavy rain, it is easy to detect a dangerous state by switching the threshold value to a smaller value.

  1 monitors the acceleration signal SG2 output from the acceleration sensor 131. For example, the acceleration of the vehicle is determined from the change in the vehicle speed pulse output from the vehicle speed sensor 132 (time differential value of the vehicle speed). Can also be detected.

  The vehicle data recording apparatus 100 shown in FIG. 1 is assumed to be a drive recorder, but it is also conceivable that a digital tachograph that collects and records various data on the vehicle is equipped with a similar function. It is done.

DESCRIPTION OF SYMBOLS 100 Vehicle data recording device 110 Drive recorder main body 111 Wiper signal input part 112 Automatic threshold value switching part 113 Fine weather / rainy weather identification part 114 Threshold selection part 115 Clock circuit 116 Acceleration detection part 117 Acceleration comparison part 118 Signal processing part 119 Data recording part 121 Wiper operation section 122 Raindrop sensor 123 Wiper control section 124 Wiper drive mechanism 131 Acceleration sensor 132 Vehicle speed sensor 133 Car-mounted camera 134 Memory card SG1 Wiper signal SG2 Acceleration signal THL Rain threshold THH Clear threshold

Claims (1)

A vehicle data recording device that is mounted on a vehicle and acquires predetermined data and records data when an abnormal behavior is detected based on the acceleration of the vehicle,
A wiper signal input unit for inputting a signal related to an operation status of a wiper mechanism for wiping the window of the vehicle, or a signal related to a raindrop detection status in the vehicle, as a wiper signal;
An acceleration detector for detecting the magnitude of acceleration in the vehicle;
An acceleration comparison unit that compares the magnitude of the acceleration detected by the acceleration detection unit with a threshold and outputs an abnormal signal when the acceleration exceeds the threshold;
An automatic threshold value switching unit that switches the threshold value given to the acceleration comparison unit to a single threshold value selected according to the state of the wiper signal from a plurality of threshold values;
A signal processing unit for generating vehicle speed information from a signal acquired from a vehicle speed sensor of the vehicle, and generating recordable image data from a video signal acquired from an in-vehicle camera mounted on the vehicle;
A data recording unit for recording the vehicle speed information and image data output from the signal processing unit;
With
The automatic threshold value switching unit corresponds to a heavy rain when the wiper operating speed is equal to or higher than a predetermined speed when a state corresponding to the wiper signal during the wiper operation continues for a predetermined first time or more. A first threshold value is selected, and when the operating speed of the wiper is less than the predetermined speed, a second threshold value greater than the first threshold value corresponding to a normal rain condition is selected, and the first threshold value or the first threshold value is selected . In a state in which the threshold value of 2 is selected, the second threshold value corresponding to a clear sky state when the state corresponding to the wiper signal being stopped when the wiper is stopped continues for a second time longer than the first time. Select a third threshold value that is greater ,
The data recording unit constantly records the vehicle speed information and image data output from the signal processing unit while updating the data until the acceleration comparison unit outputs the abnormal signal, and records the acceleration. When the comparison unit outputs the abnormal signal, the updating of the data for the predetermined time is stopped and the data is stored, and the vehicle speed information and the image data output from the signal processing unit are passed over a predetermined time. Record,
A vehicular data recording apparatus.

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