JP6435658B2 - Drive recorder and program for drive recorder - Google Patents

Description

  The present invention relates to a drive recorder and a program for the drive recorder.

  A conventional drive recorder stores an image captured by a camera when a recording condition for acceleration or the like is satisfied (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-170595

  The conventional drive recorder is designed to record video when the host vehicle encounters an accident, so it operates as described above, but it has encountered an accident with another vehicle near the host vehicle. Under such circumstances, there is a problem that it is difficult to record video on a drive recorder.

  In view of the above problems, an object of the present invention is to provide a drive recorder that can easily record an image even in a situation where an accident of another vehicle is encountered in the vicinity of the host vehicle.

The invention described in claim 1 for achieving the above object is a drive recorder for a vehicle, wherein an image taken by a camera (11) is recorded according to a detection result of an acceleration sensor (12). And a second storage unit (230) for storing video captured by the camera in the recording device based on the input of predetermined audio to the audio input device (19). 135), and when the second storage means stores the video imaged by the camera, the first storage means detects the acceleration that is equal to or higher than a reference value. According to another aspect of the present invention, there is provided a drive recorder characterized by starting to store captured images in the recording device .

  As described above, the drive recorder stores the video based on the input of the predetermined sound to the audio input device in addition to the first storage unit that stores the video according to the detection result of the acceleration sensor (12). Since it has 2 storage means, in a situation where an accident of another vehicle has been encountered in the vicinity of the host vehicle, a video can be easily recorded simply by inputting a predetermined voice to the voice input device.

According to a sixth aspect of the present invention, there is provided a program for use in a vehicle drive recorder (1), wherein a control unit (21) of the drive recorder uses an acceleration sensor ( The first storage means (230) for storing in the recording device (17) according to the detection result of 12) and the video captured by the camera based on the input of a predetermined sound to the audio input device (19) Based on the fact that the acceleration sensor detects an acceleration equal to or higher than a reference value while the second storage unit stores the video imaged by the camera. The first storage means is a program characterized by starting to store the video imaged by the camera in the recording device .
As described above, the features of the present invention can be understood as a program.

  In addition, the code | symbol in the bracket | parenthesis in the said and the claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later. .

It is a lineblock diagram of an in-vehicle system concerning an embodiment of the present invention. It is a flowchart of the main process which a control part performs. It is a flowchart of a vehicle speed confirmation process. It is a flowchart of an input audio | voice confirmation process. It is a flowchart of an interruption process. It is a figure which illustrates the recording method when "recording" is uttered after interruption by the acceleration sensor occurs. It is a figure which illustrates the recording method when interruption by an acceleration sensor generate | occur | produces after saying "recording".

  Hereinafter, an embodiment of the present invention will be described. As shown in FIG. 1, the in-vehicle system mounted on the vehicle in this embodiment includes a drive recorder 1, a camera 11, an acceleration sensor 12, an internal memory 13, a GPS antenna 14, a vehicle speed sensor 15, a display device 16, a recording device 17, A speaker 18 and a microphone 19 are provided. Further, the drive recorder 1 has a voice recognition unit 20 and a control unit 21.

  The camera 11 is fixed to the vehicle body or the drive recorder 1, images the front end portion of the vehicle and the front of the vehicle at a predetermined frame rate (for example, 30 frames / second), and sequentially outputs the images to the control unit 21.

  The acceleration sensor 12 is fixed to the vehicle body or the drive recorder 1 and outputs an acceleration detection signal indicating the acceleration applied to the own device to the drive recorder 1 at all times. The acceleration sensor 12 outputs an interrupt signal to the control unit 21 when the acceleration applied to the own device exceeds a predetermined value.

  The internal memory 13 is a memory (for example, a volatile memory) for temporarily storing data such as video captured by the camera 11, and is provided inside the in-vehicle device other than the drive recorder 1. Alternatively, the internal memory 13 may be provided inside the drive recorder 1.

  The GPS antenna 14 is fixed to the vehicle body of the vehicle or the drive recorder 1 and acquires information on the current time (absolute time), the current position of the own device, and the moving speed according to a signal transmitted from a GPS satellite, 21 is an apparatus for outputting to the apparatus 21.

  The vehicle speed sensor 15 is fixed to the vehicle body of the vehicle and constantly outputs a vehicle speed signal corresponding to the vehicle speed to the control unit 21. The display device 16 is an image display device that is fixed to the vehicle body or the drive recorder 1 and displays an image to a user in the vehicle.

  The recording device 17 is a non-volatile memory (for example, flash memory) for storing data such as video captured by the camera 11 for a long period of time, and is provided inside the in-vehicle device other than the drive recorder 1. Alternatively, the recording device 17 may be provided inside the drive recorder 1.

  The speaker 18 (sound output device) is a device that is fixed to the vehicle body or the drive recorder 1 and outputs sound according to control from the control unit 21. The microphone 19 (corresponding to an example of an audio input device) is disposed in the vehicle interior by being fixed to the vehicle body or the drive recorder 1, and outputs an audio signal corresponding to the audio in the vehicle interior to the control unit 21.

  The voice recognition unit 20 is a device that performs well-known voice recognition on the voice input to the microphone 19 and recorded in the internal memory 13, and outputs the recognition result to the control unit 21. The control unit 21 is a known microcomputer provided with a CPU, RAM, ROM, and the like. The control unit 21 realizes a pre-fetching process, a main process, and an interrupt process, which will be described later, by the CPU executing a program recorded in the ROM.

  Hereinafter, the operation of the above-described in-vehicle system will be described. The control unit 21 of the drive recorder 1 executes interrupt processing shown in FIGS. More specifically, when the main power source (for example, IG) of the vehicle is turned on, the control unit 21 starts the main process shown in FIG. 2, first executes step 110, and then repeatedly executes steps 120 and 130. . Then, in step 120, processing as shown in FIG. 3 is executed, and in step 130, processing as shown in FIG. 4 is executed. When the interrupt signal from the acceleration sensor 12 to the control unit 21 is generated during the execution of the main process in FIG. 2, the control unit 21 interrupts the main process in FIG. 2 and executes the interrupt process in FIG. After the interruption process is completed, the main process in FIG. 2 is resumed.

  Moreover, the control part 21 is performing the prior acquisition process simultaneously with the main process of FIG. 2, while the main power supply (for example, IG) of a vehicle is ON. In the pre-fetching process, the control unit 21 stores necessary data in the internal memory 13 in synchronization with the frame rate of the camera 11, that is, 30 times per second if the frame rate is 30 frames / second. Necessary data is acquired from the front end of the vehicle and the front image of the vehicle acquired from the camera 11, the current time and current position acquired from the GPS antenna 14, the current vehicle speed acquired from the vehicle speed sensor 15, and the microphone 19. Including the latest audio. Further, in the pre-fetching process, the control unit 21 deletes necessary data stored in the internal memory 13 that has passed a predetermined preceding storage time (for example, 15 seconds) from the time of storage. That is, the control unit 21 holds necessary data for a period that is backed by the preceding storage time from the present in the internal memory 13 in the pre-fetching process.

  Hereinafter, each process of the control unit 21 will be described in detail. When the main power supply of the vehicle is turned on, the control unit 21 starts the main process in FIG. 2, and first sets the acceleration sensor 12 in step 110. Specifically, a threshold value serving as a reference for determining whether or not the acceleration sensor 12 outputs an interrupt signal to the control unit 21 is output to the acceleration sensor 12. This threshold value is a constant value determined in advance when the drive recorder 1 is manufactured. After the threshold value is input, the acceleration sensor 12 outputs an interrupt signal to the control unit 21 only when the acceleration applied to the own device exceeds the threshold value.

  The control unit 21 then proceeds to step 220 and performs a vehicle speed confirmation process. In the vehicle speed confirmation process, as shown in FIG. 3, first, in step 122, the vehicle speed signal output from the vehicle speed sensor 15 is fetched into its own RAM, and in the following step 124, the vehicle speed of the vehicle is specified based on this vehicle speed signal. The specified vehicle speed data is recorded in the internal memory 13 as the latest vehicle speed.

  Subsequently, at step 126, based on the latest vehicle speed recorded in the internal memory 13, it is determined whether or not the vehicle is traveling. If it is determined that the vehicle is traveling, the process proceeds to step 128, where it is determined that the vehicle is not traveling. In this case, the vehicle speed confirmation process in FIG. 3 is terminated and the process proceeds to step 130 in FIG.

  In step 128, if the control unit 21 reproduces the video recorded in the recording device 17 and displays it on the display device 16, the reproduction is stopped and the display on the display device 16 is stopped. The confirmation process is terminated and the process proceeds to step 130 in FIG. If the control unit 21 has not reproduced the video recorded in the recording device 17 and is not displaying it on the display device 16, it simply ends the vehicle speed confirmation process of FIG. 3 and proceeds to step 130 of FIG.

  In step 130, input voice confirmation processing is performed. In the input voice confirmation process, as shown in FIG. 4, first, in step 131, the voice signal output from the microphone 19 is taken into the own apparatus for a reference time (for example, 1 second). In the following step 132, voice data (data representing a voice waveform) is created based on the fetched voice signal and recorded in the internal memory 13, and the voice recognition unit 20 is instructed to perform voice recognition. The internal memory 13 holds the latest audio data for a time longer than the reference time (for example, three times the reference time).

  The voice recognition unit 20 that has been instructed to perform voice recognition specifies a word included in the voice represented by the voice data by performing a known voice recognition process based on the voice data recorded in the internal memory 13. The recorded word is overwritten and recorded in the internal memory 13 as a recognition result. Note that words that can be specified by the speech recognition unit 20 of the present embodiment are a plurality of predetermined words such as “record”, “play”, “stop”, “fast forward”, “rewind”, and “first”. Only. If the word cannot be specified, the recognition result is not recorded in the internal memory 13 but the recognition result currently recorded in the internal memory 13 is also deleted.

  In step 133 following step 132, the control unit 21 determines whether or not the voice recognition result is recorded in the internal memory 13. If the voice recognition result is recorded, the control unit 21 proceeds to step 134. The input voice confirmation process is terminated, and the process returns to step 120 in FIG.

  In step 134, it is determined whether or not “record” is included in the voice recognition result recorded in the internal memory 13. If included, the process proceeds to step 135, and if not included, the process proceeds to step 137. The fact that “recording” is not included in the voice recognition result in the internal memory 13 at this time indicates that the voice recognition result in the internal memory 13 is any one of “play”, “stop”, “fast forward”, and “rewind”. Will be included.

  In step 135, audio, video, etc. are stored in the recording device 17. Specifically, the necessary data for the preceding storage time recorded in the internal memory 13 at the time of proceeding from step 134 to step 135 is copied to the recording device 17 and a predetermined post-storage time (for example 15 Second) of necessary data is stored in the recording device 17. Furthermore, the absolute time at the time when the word “record” is received is stored in the recording device 17 in association with the necessary data for the preceding storage time and the subsequent storage time. As the absolute time when the utterance of the word “record” is received, for example, the current time acquired from the GPS antenna 14 at the time of proceeding from step 134 to step 135 is used.

  A method of storing necessary data for the post-storage time from the time point in the recording device 17 is as follows. The control unit 21 acquires the absolute time (for example, Japan Standard Time) at the time point from the GPS antenna 14 and sets the absolute time after adding the post-storage time to the absolute time as the end time. If the current absolute time acquired from the GPS antenna 14 is earlier than the end time, the control unit 21 stores necessary data in synchronization with the frame rate of the camera 11, and the current absolute time is the end time. After that, the storage of necessary data is stopped and step 135 is ended. The content of the necessary data is the same as the necessary data that the control unit 21 records in the internal memory 13 at the same time in the pre-fetching process.

  When the storage of the necessary data for the subsequent storage time is completed, the control unit 21 ends the process of FIG. 4 and returns to step 120 of FIG. Thus, the necessary data for the preceding storage time and the necessary data for the subsequent storage time stored in the recording device 17 are stored in the recording device 17 for a long period of time (for example, even when the main power of the vehicle is turned off). The In this way, the control unit 21 records the audio and video before and after the utterance in the storage device 17 when the vehicle occupant speaks “record”. The necessary data for the previous storage time and the subsequent storage time stored at this time, and the absolute time at the time of receiving the utterance of the word “record” are recorded in the recording device 17 as one drive record data file. Is done.

  In step 135, if the recording of the drive record data file is successful, the speaker 18 outputs a voice message “Recording was successful”. In step 135, if the drive record data file cannot be recorded due to some abnormality, a voice message “could not be recorded” is output to the speaker 18.

  Further, when the control unit 21 performs the main process of FIG. 2, an accident occurs in the vehicle on which the on-vehicle system is mounted, a strong impact is applied to the vehicle, and the acceleration sensor 12 generates an acceleration exceeding the threshold value. Suppose that it is detected. Then, the acceleration sensor 12 outputs an interrupt signal to the control unit 21.

  As described above, when the interrupt signal from the acceleration sensor 12 to the control unit 21 is generated, the control unit 21 interrupts the process of FIG. 2 and starts executing the interrupt process of FIG. At this time, the pre-fetching process is not interrupted and is continuously executed in parallel with the interrupt process.

  In the interrupt process, the control unit 21 first takes in an acceleration detection signal from the acceleration sensor 12 in step 210, and then determines in step 124 whether the acceleration indicated by the acceleration detection signal is equal to or higher than a reference value. This reference value may be the same as or larger than the threshold value set in step 110 of the main process in FIG. If it is determined that the acceleration is greater than or equal to the reference value, the process proceeds to step 230. If it is determined that the acceleration is less than the reference value, the interrupt process is terminated.

In step 230, audio, video, etc. are stored in the recording device 17 in the same manner as in step 135. Specifically, the necessary data for the preceding storage time recorded in the internal memory 13 at the time of proceeding from step 220 to step 230 is copied to the recording device 17, and a predetermined post-storage time (for example, 15) is recorded from that time. Second) of necessary data is stored in the recording device 17. Further, the absolute time at the time when the interrupt signal is generated is stored in the recording device 17 in association with the necessary data for the preceding storage time and the necessary data for the subsequent storage time. As the absolute time when the interrupt signal is generated, for example, the current time acquired from the GPS antenna 14 at the time of proceeding from step 220 to step 230 is used. When the storage of the necessary data for the subsequent storage time is completed, the control unit 21 ends the interrupt process of FIG. Thus, the necessary data for the preceding storage time and the necessary data for the subsequent storage time stored in the recording device 17 are stored in the recording device 17 for a long period of time (for example, even when the main power of the vehicle is turned off). The
Thus, the necessary data for the preceding storage time and the necessary data for the subsequent storage time stored in the recording device 17 are stored in the recording device 17 for a long period of time (for example, even when the main power of the vehicle is turned off). The

  As described above, the control unit 21 records the sound and the video before and after the acceleration detection in the storage device 17 by the acceleration detection of the acceleration sensor 12 in the same manner as a normal drive recorder. The necessary data for the previous storage time and the subsequent storage time stored at this time, and the absolute time when the interrupt signal is generated, are recorded in the recording device 17 as one drive record data file. Note that when the interrupt process is completed, the control unit 21 resumes the main process of FIG. 2 from the state at the time of interruption.

  Here, in the main processing of FIG. 2, step 137 is executed when the speech recognition result in the internal memory 13 includes any one of “play”, “stop”, “fast forward”, and “rewind”. 138 will be described.

  In step 137, the control unit 21 determines whether or not the vehicle is traveling based on the vehicle speed signal acquired from the vehicle speed sensor 15. If the vehicle is traveling, the video display during traveling is not preferable. The process ends and the process returns to step 120 in FIG.

  If it is determined in step 137 that the vehicle is not traveling, the process proceeds to step 139, and processing according to words (that is, reproduction-related commands) included in the speech recognition result is performed.

  Specifically, when the reproduction-related command is “reproduction”, a plurality of drive record data files (stored by step 135 in FIG. 2 or step 230 in FIG. 5) stored in the recording device 17 are stored. The list is displayed on the display device 16 in the order from the latest acquisition time (absolute time in the file). The occupant uses the display to specify the drive record data file to be viewed by voice. For example, if the user wants to play the first file in the list, say “best”. When the speech recognition unit 20 recognizes the “first” utterance, the control unit 21 reproduces the video and audio including the first file using the display device 16 and the speaker 18.

  If the playback related command is “stop”, playback of the video and audio currently being performed is terminated. If the playback-related command is “fast forward”, playback is fast-forwarded. If the playback-related command is “rewind”, playback is rewound.

  Further, when the vehicle starts traveling during the reproduction of the drive record data file, the control unit 21 determines that the vehicle is traveling in step 126 in FIG. Continues to play, but the video display on the display device 16 is blocked. That is, the video in the drive record data file is not displayed on the display device 16.

  The drive record data file playback function is an incidental function, and the drive record data file recording is given priority.

[Case A]
Here, with regard to the drive recorder 1 as described above, a case A in which an accident has occurred in another vehicle in the vicinity of the own vehicle, although no accident has occurred in the own vehicle equipped with the in-vehicle system, will be described.

  In this case A, the host vehicle does not receive an impact, so the acceleration sensor 12 does not exceed the above-described threshold value, and therefore no interrupt signal is generated from the acceleration sensor 12 to the control unit 21. When an occupant of the own vehicle finds an accident in another vehicle, he / she utters “record” by voice. At this time, the occupant does not perform a manual operation for starting speech recognition, such as pressing an utterance start button before uttering “record”.

  Then, as described above, the audio signal is captured by the control unit 21 (step 131), and the audio data of the audio is stored in the internal memory 13 by the control unit 21 (step 132). Then, the voice recognition unit 20 records the word “record” in the internal memory 13 as a voice recognition result by performing voice recognition processing on the voice data. The control unit 21 determines that the voice recognition result is “record” (step 134), stores the drive record data file described above in the recording device 17, and a voice message “recording was successful” is output from the speaker 18. It is output (step 135). The drive record data file to be stored includes necessary data for the previous storage time and the subsequent storage time, as well as the absolute time when the word “record” is received, as described above.

  In this way, the vehicle drive recorder 1 stores the video captured by the camera 11 in the recording device 17 based on the input of a predetermined “record” sound to the microphone 19 (step 135). Therefore, in a situation where an accident of another vehicle has been encountered in the vicinity of the host vehicle, a video can be easily recorded by simply inputting predetermined sound into the microphone 19.

[Case B]
Next, a case B in which an occupant speaks “record” immediately after an accident of the host vehicle occurs will be described with reference to FIG. In this case, at the time t1 when the accident of the host vehicle occurs, a strong impact is applied to the host vehicle, the acceleration sensor 12 detects an acceleration exceeding the threshold value, and outputs an interrupt signal to the control unit 21.

  When an interrupt signal from the acceleration sensor 12 to the control unit 21 is generated, the control unit 21 interrupts the process of FIG. 2 and starts executing the interrupt process of FIG. Then, an acceleration detection signal is captured from the acceleration sensor 12 (step 210), and based on this acceleration detection signal, it is determined that the acceleration is equal to or higher than a reference value (step 220), and the drive record data file 41 is stored in the recording device 17. Saving is started (step 230).

  At this time, the video and audio included in the drive record data file 41 are recorded in a recording period 31 starting from a time point t0 that is earlier than the time point t1 by the preceding storage time and ending at a time point t3 after the subsequent storage time from the time point t1. Video and audio to be captured. Therefore, the saving of the drive record data file 41 in step 230 ends at time t3.

  Here, it is assumed that an occupant of the host vehicle utters “record” at time t2 after time t1 and before time t3. However, at this point in time, the control unit 21 suspends the execution of the main process in FIG. 2, and naturally, steps 131 to 134 in FIG. 4 are not executed. Therefore, since the voice recognition unit 20 also performs voice recognition for this utterance, the recognition result “record” is not recorded in the internal memory 13. That is, the utterance “record” is ignored, and the drive record data file is not newly recorded due to the utterance “record”. Thus, when an interrupt from the acceleration sensor occurs and the interrupt process is being executed, the utterance “record” is ignored because the main process is not executed.

  Thus, even if the occupant speaks “record” in the middle of recording the drive record data file 41 due to the accident of the own vehicle, it is ignored for the following reason. In the first place, the reason why the drive record data file is recorded due to the utterance of “record” is to record the accident of the other vehicle, not the accident of the own vehicle. For this reason, the word that triggers recording of the drive record data file is selected as a word that appears in a relatively calm state, “recording”.

  However, immediately after an accident occurs in the host vehicle, it is unlikely that the occupant is calm, and there is a very high possibility that he / she rushed to “record” even if there was no accident in another vehicle. Moreover, even if there is an accident of another vehicle immediately after the accident of the own vehicle, it is not considered that the importance of recording it is high. For these reasons, the control unit 21 ignores even if the occupant speaks “record” while recording the drive record data file 41 due to the occurrence of an accident in the host vehicle. .

[Case C]
Next, a case C in which an occupant speaks “record” and an accident of the own vehicle immediately occurs will be described with reference to FIG. In this case, at time t5 when the occupant speaks “record”, the signal of the spoken voice is taken into the control unit 21 (step 131), and the voice data of the voice is stored in the internal memory 13 by the control unit 21 (step 131). Step 132). Then, the voice recognition unit 20 records the word “record” in the internal memory 13 as a voice recognition result by performing voice recognition processing on the voice data. The control unit 21 determines that the voice recognition result is “record” (step 134), and starts saving the drive record data file 42 in the recording device 17 (step 135).

  At this time, the video and audio that the control unit 21 intends to record as the drive record data file 42 starts from a time point t4 that is earlier than the time point t5 by the preceding storage time, and ends at a time point t6 that has passed the subsequent storage time from the time point t5. Video and audio captured during the recording period 32.

  Here, at the time t8 after the time t5 and before the time t6, an accident occurs in the own vehicle, a strong impact is applied to the own vehicle, and the acceleration sensor 12 detects an acceleration exceeding the above threshold, and an interrupt signal Is output to the control unit 21. When an interrupt signal from the acceleration sensor 12 to the control unit 21 is generated, the control unit 21 interrupts the process of step 135 in FIG. 4 and starts executing the interrupt process in FIG. When the process of step 135 is interrupted, the video and audio recorded in the recording device 17 as the drive record data file 42 are video and audio from time t4 to time t8.

  Then, in the interrupt process, the control unit 21 takes in an acceleration detection signal from the acceleration sensor 12 (step 210), determines that the acceleration is equal to or higher than a reference value based on the acceleration detection signal (step 220), and drives record data A new drive record data file 43 different from the file 42 is stored in the recording device 17 (step 230).

  At this time, the video and audio included in the drive record data file 43 are recorded in a recording period 33 starting from a time point t7 that is earlier than the time point t8 by the preceding storage time and ending at a time point t9 that is the time after the subsequent storage time. Video and audio to be captured. Therefore, the storage of the drive record data file 43 in step 230 ends at time t9.

  At time t9, when step 230 ends and interrupt processing ends, the control unit 21 resumes step 135 of the main processing from the point of interruption. The method of saving necessary data for the post-storage time in the drive record data file 41 in step 135 is as already described. That is, an absolute time t6 (for example, Japan Standard Time) is acquired from the GPS antenna 14, and the absolute time t6 after adding the subsequent storage time to the absolute time is set as the end time. When the current absolute time acquired from the GPS antenna 14 is before the end time t6, the control unit 21 stores necessary data in synchronization with the frame rate of the camera 11, and the current absolute time ends. When it is later than time t6, the storage of necessary data is stopped and step 135 is ended.

  In this case C, step 135 is resumed at time t9 after the end time t6, so that the control unit 21 determines that the current absolute time acquired from the GPS antenna 14 is later than the end time at time t9. Then, the storage of the drive record data file 42 (necessary data) is terminated and the step 135 is terminated. As a result, the drive record data file 42 from time t4 to time t8 and the drive record data file 43 from time t7 to time t9 are recorded in the recording device 17. With this configuration, there is no time gap between video and audio in the drive record data file 42.

  As described above, in the present case C, when an accident occurs in the own vehicle in the middle of recording the drive record data file 42 due to the utterance “record”, the accident occurs in the own vehicle. Drive record data file 43 is recorded. This is because the record related to the accident of the own vehicle is considered to be more important than the record of the accident of the other vehicle.

  Note that the portion where the drive record data file 42 and the drive record data file 43 overlap in time may not be recorded in the recording device 17 in the interrupt process, for example. Even if it does in this way, it is because the information before and after the occurrence of the accident is not lost.

  As described above, the vehicle drive recorder 1 according to the present embodiment stores the video captured by the camera 11 in the recording device 17 according to the detection result of the acceleration sensor 12 (step 230). Further, the video imaged by the camera 11 is stored in the recording device 17 based on the input of predetermined sound (“record”) to the microphone 19 (step 135). Therefore, in a situation where an accident of another vehicle has been encountered in the vicinity of the host vehicle, a video can be easily recorded by simply inputting predetermined sound into the microphone 19.

  In the present embodiment, the control unit 21 functions as an example of the first storage unit by executing Step 230 of FIG. 5, and functions as an example of the second storage unit by executing Step 135 of FIG. To do.

  Here, a plurality of conventional techniques and their problems will be described. In JP-A-63-16785, JP-A-06-237463, and JP-A-2011-170595, when a recording condition such as acceleration is satisfied, an image of a drive recorder is stored. These are technologies mainly assuming the case where an accident is encountered, and it is difficult to stop the video at the timing intended by the user.

  Japanese Patent Application Laid-Open No. 2013-137668 displays an image on a video display device connected to the outside. Select, play, stop, fast forward, rewind, etc. video data by acquiring coordinates from an external video display. In such a technique, since it is necessary to touch the screen for operation, the mounting place of the external video display device must be arranged near the user. Further, when the user himself / herself encounters an accident in the vicinity and wants to act (stop / save) for recording a video, the user needs to stop or decelerate to a safe speed for screen operation. At the same time, in the case of an apparatus with a limited recording time, if it takes a long time to stop, the video that was desired to be stored cannot be stored. It is dangerous to operate / operate the screen especially in a situation where the vehicle is traveling on a highway.

  Japanese Patent Application Laid-Open No. 2009-009329 predicts a landscape input by a user, and records video, images, and audio when they match. With such a technique, it is impossible to predict in advance an accident video that cannot be predicted in advance. As a result, images such as traffic accidents, video and audio cannot be acquired intentionally. Moreover, although the audio | voice is taken in for audio | voice data recording, it does not operate for a drive recorder, or is not utilized for operation.

(Other embodiments)
In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. In addition, in the above embodiment, the elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Needless to say. Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases. In the above embodiment, when referring to the shape, positional relationship, etc. of components, the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships. The present invention also allows the following modifications to the above embodiment. In addition, the following modifications can select application and non-application to the said embodiment each independently. In other words, any combination of the following modifications can be applied to the above-described embodiment.

(Modification 1)
In the above embodiment, the drive record data file recorded in the recording device 17 includes video captured by the camera 11, sound input to the microphone 19, and absolute time acquired from the GPS antenna 14. This is not necessarily the case. For example, the drive record data file recorded in the recording device 17 includes video captured by the camera 11 and may not include audio input to the microphone 19 or absolute time acquired from the GPS antenna 14. .

(Modification 2)
Further, in the above embodiment, “record” is adopted as the predetermined sound input to the microphone 19 as a cause for recording the video of the accident of the other vehicle as a drive record data file in the recording device 17. However, this is merely an example, and for example, the term “recording” may be adopted instead of “recording”. Common to both is the inclusion of the word “禄”. Further, the term “record” may be adopted instead of “record”. Common to the above voices is to include words that mean recording. Further, instead of “recording”, a voice that is not produced by a person, for example, a sound of a horn of the host vehicle may be employed.

(Modification 3)
In the above embodiment, the method in which the control unit 21 stores the necessary data for the post-storage time in the drive record data file 41 in step 135 is as follows. In other words, the absolute time (for example, Japan Standard Time) at the time of utterance is acquired from the GPS antenna 14, and the absolute time after adding the subsequent storage time to the absolute time is set as the end time. If the current absolute time acquired from the GPS antenna 14 is earlier than the end time, the control unit 21 stores necessary data in synchronization with the frame rate of the camera 11, and the current absolute time is the end time. After that, the storage of necessary data is stopped and step 135 is ended.

  However, this is not necessarily the case. For example, the control unit 21 measures the elapsed time (relative time) from when the utterance occurred, and if this elapsed time is less than the post-storage time, the necessary data is synchronized with the frame rate of the camera 11. If the elapsed time becomes longer than the post-hoc storage time, the necessary data may not be stored and step 135 may be terminated.

  In this case, in the case C, the control unit 21 ends the interrupt process at time t9 and returns to step 135 of the main process, and then drives the drive record for the same time as the period from time t8 to time t6. Recording of the data file 42 is continued. In this case, unlike the above embodiment, in the drive record data file 42, a time gap from time t8 to time t8 occurs in the video and audio.

(Modification 4)
In the above embodiment, the camera 11 captures the front end of the vehicle and the front of the vehicle, but this need not necessarily be the case. For example, the camera 11 may capture the rear of the vehicle. The camera 11 only needs to be able to photograph part or all of the surroundings of the vehicle.

DESCRIPTION OF SYMBOLS 1 Drive recorder 11 Camera 12 Acceleration sensor 17 Recording device 19 Microphone (voice input device)

Claims (5)

A drive recorder for a vehicle,
First storage means (230) for storing an image captured by the camera (11) in the recording device (17) in accordance with a detection result of the acceleration sensor (12);
A second storage means (135) for storing the video captured by the camera in the recording device based on the input of a predetermined sound to the audio input device (19);
Based on the fact that the acceleration sensor detects an acceleration equal to or higher than a reference value while the second storage unit is storing the video captured by the camera, the first storage unit is configured to record the video captured by the camera. Drive recorder characterized by starting to save on.   The drive recorder according to claim 1, wherein the predetermined sound is a sound including a word meaning recording. While the first storage unit stores the video in the recording device, the second storage unit stores the video captured by the camera in the recording device even when the predetermined audio is input to the audio input device. The drive recorder according to claim 1 or 2 , wherein the drive recorder is not. When the predetermined voice is input to the voice input device, the second storage unit is configured so that the camera is not related to a detection result of the acceleration sensor when the predetermined voice is input to the voice input device. drive recorder according to any one of claims 1 to 3, characterized in that to save the captured image in the recording device. A program used for a drive recorder (1) for a vehicle,
The control unit (21) of the drive recorder is
First storage means (230) that stores the video captured by the camera (11) in the recording device (17) according to the detection result of the acceleration sensor (12), and the video captured by the camera as an audio input device ( 19) functioning as second storage means (135) for storing in the recording device based on the input of a predetermined sound,
Based on the fact that the acceleration sensor detects an acceleration equal to or higher than a reference value while the second storage unit is storing the video captured by the camera, the first storage unit is configured to record the video captured by the camera. A program characterized by starting to save.

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