JP2021182385A - Information recording device, information recording method, and program for information recording - Google Patents

Abstract

To provide an information recording device capable of securely recording necessary recording information while suppressing unnecessary power consumption.SOLUTION: When recording control over a recording part R for recording information is controlled according to detected acceleration, at least one of image information and sound information is acquired as recording information, and after electric power supply from outside is stopped, a power source is stopped a present standby time later. At this time, the standby time can be prolonged.SELECTED DRAWING: Figure 2

Description

The present application belongs to the technical fields of information recording devices, information recording methods and information recording programs. More specifically, it belongs to the technical fields of an information recording device and an information recording method for recording image information and the like, and a program for the information recording device.

In recent years, for example, for the purpose of security in a vehicle, a so-called drive recorder is mounted on the vehicle. Examples of the prior art document that discloses the prior art relating to such a drive recorder include the following Patent Document 1. In the technique described in Patent Document 1, in the drive recorder, power is supplied to the drive recorder itself, for example, after the ACC (Accessory) switch is turned off by stopping the vehicle on which the drive recorder is mounted. It is equipped with a delay circuit that stops after being delayed (continued) by using a battery or the like. According to this configuration, even if the vehicle is stopped, for example, information necessary for the next startup of the drive recorder can be recorded in a temporary recording medium such as RAM (Random Access Memory), and the recording is further performed. It is also possible to record (transfer) the recorded information or the like on a non-volatile recording medium.

Japanese Unexamined Patent Publication No. 2007-142214 (for example, paragraphs [0073] and [0074] of the present specification).

However, even with the technique described in Patent Document 1, it is necessary to newly record another information while the power supply is delayed after the ACC switch is turned off. If this happens, there is a problem that the other information may not be recorded / saved due to insufficient time to delay, or some may be recorded / saved but the rest may not be recorded / saved until the end. be.

Further, as a measure against the fact that the above-mentioned information to be recorded is not recorded, it is conceivable to set the delay time uniformly for a required amount, but in this case, it is long every time even when it is not necessary to record the above-mentioned other information. It is necessary to provide a delay time, and in this case, there is a problem that the power of the battery is unnecessarily consumed.

Therefore, the present application has been made in view of each of the above problems, and one example of the problem is an information recording device capable of reliably recording necessary recorded information while suppressing unnecessary power consumption. The present invention is to provide an information recording method and a program for the information recording device.

In order to solve the above problems, the invention according to claim 1 is an information recording device that controls recording of recorded information to a recording means by means of detected acceleration, and is at least one of image information and sound information. The standby time can be extended by providing an acquisition means for acquiring the recorded information and a stop control means for stopping the power supply when a preset standby time elapses after the power supply from the outside is stopped. It is composed of.

In order to solve the above-mentioned problems, the invention according to claim 3 is an information recording device that controls recording of recorded information to a recording means by a detected acceleration, and includes an acquisition means and a stop control means. In the information recording method executed in the information recording device provided, the acquisition step of acquiring at least one of the image information and the sound information as the recording information by the acquisition means, and the stop after the power supply from the outside is stopped. The control means includes a stop control step of stopping the power supply when a preset standby time elapses, and the standby time is configured to be extendable.

In order to solve the above-mentioned problems, the invention according to claim 4 uses at least one of image information and sound information for a computer included in an information recording device that controls recording of recorded information to a recording means by means of detected acceleration. An information recording program that functions as an acquisition means for acquiring one of the recorded information and a stop control means for stopping the power supply when a preset standby time elapses after the power supply from the outside is stopped. , The waiting time is configured to be extendable.

It is a block diagram which shows the outline structure of the information recording apparatus which concerns on embodiment. It is a block diagram which shows the outline structure of the drive recorder which concerns on Example. It is a flowchart which shows the recording process which concerns on Example. It is a figure which concretely exemplifies the storage time and the like which concerns on an Example, (a) is a figure which shows the 1st example, (b) is a figure which shows the 2nd example.

Next, a mode for carrying out the present application will be described with reference to FIG. Note that FIG. 1 is a block diagram showing an outline configuration of the information recording device according to the embodiment.

As shown in FIG. 1, the information recording device S according to the embodiment includes an acquisition means 1, a detection means 2, a recording control means 3 connected to the recording means R, and a stop control means 4. Has been done.

In this configuration, the acquisition means 1 acquires at least one of image information and sound information as recorded information.

On the other hand, the detecting means 2 detects the applied acceleration.

As a result, the recording control means 3 starts recording the recorded information in the recording means R when the applied acceleration is equal to or higher than the preset threshold value.

Then, the stop control means 4 stops the power supply when the preset standby time elapses after the power supply from the outside is stopped, and when the acceleration equal to or higher than the threshold value is detected within the standby time, the standby time is set. Extend.

As described above, according to the operation of the information recording device S according to the embodiment, when at least one of the image information and the sound information is acquired as the recording information and the applied acceleration is equal to or higher than the predetermined threshold value. Recording of the recorded information to the recording means R is started. On the other hand, after the power supply from the outside is stopped, the power is stopped after the predetermined standby time has elapsed. Then, when an acceleration equal to or higher than the threshold value is detected within the waiting time, the waiting time is extended. Therefore, when an acceleration exceeding a predetermined threshold value is detected during the standby time after the power supply is stopped from the outside, the standby time is extended and the power supply to the recording control means 3 is continued. Therefore, for example, sudden acceleration or sudden acceleration or sudden When an acceleration equal to or higher than a predetermined threshold value is detected due to deceleration or the like, the recorded information required later can be reliably recorded. Further, since the standby time is extended when an acceleration equal to or higher than the threshold value is detected within the standby time, it is possible to suppress the occurrence of unnecessary power consumption by extending the standby time until it is unnecessary.

Next, specific examples corresponding to the above-described embodiments will be described with reference to FIGS. 2 to 4. The examples described below are examples in which the present application is applied to a drive recorder whose imaging range is, for example, the front or the inside of a vehicle.

Further, FIG. 2 is a block diagram showing an outline configuration of a drive recorder according to an embodiment, FIG. 3 is a flowchart showing a recording process according to the embodiment, and FIG. 4 is a diagram illustrating a storage time and the like according to the embodiment. Is. At this time, in FIG. 2, for each of the constituent members of the embodiment corresponding to each constituent member in the information recording apparatus S according to the embodiment shown in FIG. 1, the same member number as each constituent member in the information recording apparatus S is used. ing.

The drive recorder according to the embodiment is mounted on a vehicle, for example, and the image pickup range is in front of the drive recorder. As shown in FIG. 2, the drive recorder DR according to the embodiment is provided with a power receiving unit 11 connected to an external power supply EB such as a vehicle battery, a drive recorder DR itself, and a battery body and a control unit thereof. A battery unit B including a battery unit B, an operation unit 10 including operation buttons, a camera unit 1 including a CCD (Charge-Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) sensor, and an, for example, a biaxial or triaxial acceleration sensor. Impact detection unit 2 consisting of CPU, RAM, ROM (Read Only Memory), etc., power supply management unit 12, volatile unit RA and SSD (Solid State Drive) or HDD consisting of RAM, etc. It is composed of a recording unit R including a non-volatile unit RO composed of (Hard Disc Drive). At this time, as an example of the external power supply EB, there is an external power supply EB (in other words, the battery of the vehicle itself) connected to the power receiving unit 11 via, for example, a so-called cigar socket of a vehicle equipped with a drive recorder DR. Be done. Further, the camera unit 1 corresponds to an example of the acquisition means 1 according to the embodiment, the impact detection unit 2 corresponds to an example of the detection means 2 according to the embodiment, and the recording unit R corresponds to the recording means R according to the embodiment. Corresponds to one example. Further, the state management unit 3 corresponds to an example of the recording control means 3 and the stop control means 4 according to the embodiment, and the battery unit B corresponds to an example of the "battery means" according to the present application, and the power supply management unit 12 Corresponds to an example of the "residual electric energy detecting means" according to the present application. Further, in FIG. 2, in the drive recorder DR, the constituent members corresponding to an example of the information recording device S according to the embodiment are shown by broken lines.

In this configuration, when the power receiving unit 11 can receive the electric power from the external power supply EB, the power receiving unit 11 receives the electric power under the control of the state management unit 3, and the camera unit 1, the impact detecting unit 2, etc. The required power is distributed / supplied to each component of the drive recorder DR. Further, when the power receiving unit 11 cannot receive the power from the external power supply EB due to, for example, the physical connection with the external power supply EB being cut off, the power receiving unit 11 indicates a power cutoff signal to that effect. Is generated and output to the state management unit 3. Here, when the physical connection with the external power supply EB is cut off, for example, the insertion portion into the cigar socket is inserted from there due to an impact caused by the sudden acceleration or deceleration of the vehicle. It is conceivable that it may come off, or that the insertion part may be artificially pulled out.

On the other hand, under the control of the state management unit 3, the camera unit 1 takes an image of, for example, the front of a vehicle equipped with a drive recorder DR, and outputs image information corresponding to the image pickup result to the volatile unit RA of the recording unit R. This continues after the start of power supply via the power receiving unit 11. Then, the state management unit 3 temporarily holds the record in the volatilization unit RA of the image information only for, for example, 12 seconds from the timing at which the image information is recorded, and thereafter, every time the image information is newly recorded, the old image is recorded. The recording unit R is controlled so that the information is erased from the volatile unit RA in order from the information. By the above control of the state management unit 3, for example, the image information for the last 12 seconds is temporarily recorded in the volatilization unit RA while being constantly updated.

Next, the state management unit 3 is normally supplied with electric power necessary for its operation from the external power supply EB via the power receiving unit 11. On the other hand, when the state management unit 3 receives the power cutoff signal from the power receiving unit 11, it controls the battery unit B to start supplying power to the power receiving unit 11. As a result, the power receiving unit 11 distributes / supplies the electric power supplied from the battery unit B to each of the above-mentioned constituent members until the preset standby time elapses. At this time, the power management unit 12 monitors the remaining power amount in the battery unit B, and sequentially generates a remaining amount signal indicating the remaining power amount and outputs it to the state management unit 3.

The standby time preset here provides information required for the next startup of the drive recorder DR when the power cutoff signal indicates that the power from the external power supply EB can no longer be received. This is the time for recording in the non-volatile unit RO of the recording unit R. Specifically, this waiting time is set to, for example, 1 second. Further, the above-mentioned "information required at the next startup" includes, for example, setting information as the drive recorder DR at the timing when the power supply from the external power supply EB is cut off, position information indicating the position at the timing, or position information indicating the position at the timing. A part of the image information (for example, image information for one screen) recorded in the volatile unit RA at the timing is included. In the following description, the information required for the next startup is simply referred to as "next startup information". Then, the state management unit 3 controls the recording unit R, the camera unit 1, and the like so that the next activation information is recorded in the non-volatile unit RO within the standby time.

On the other hand, the impact detection unit 2 indicates when it is detected that an acceleration of a preset size and direction is applied to the drive recorder DR (in other words, a vehicle equipped with the drive recorder DR). A detection signal is generated and output to the state management unit 3. This detection signal is a signal meaning that acceleration of the predetermined magnitude and direction is applied due to an impact caused by, for example, sudden acceleration or deceleration of the vehicle.

When the detection signal is output from the impact detection unit 2 within the standby time, the state management unit 3 extends the standby time to distribute / supply power from the battery unit B. 11 and the power management unit 12 are controlled. As a result, the power supply management unit 12 controls the battery unit B so as to distribute / supply the electric power until the storage time (for example, 20 seconds) described later, which is an extension of the standby time.

Then, the state management unit 3 has the image information temporarily recorded in the volatile unit RA at the timing corresponding to the storage time corresponding to the timing when the detection signal is output, and immediately after the timing when the detection signal is output. For example, the image information for 8 seconds is recorded in the non-volatile unit RO of the recording unit R. At this time, for example, 12 seconds of image information temporarily recorded in the volatile unit RA at the timing when the detection signal is output is transferred from the volatile unit RA to the non-volatile unit RO, but immediately after the timing. For example, the image information for 8 seconds is recorded directly from the camera unit 1 in the non-volatile unit RO. At this time, at the timing when the detection signal is output, the image information for, for example, 12 seconds immediately before that is temporarily recorded in the volatile unit RA, and as a result, before and after the timing, the above For example, a total of 20 seconds of image information corresponding to the storage time is recorded in the non-volatile unit RO. Further, the state management unit 3 is a non-volatile unit corresponding to the storage time of the storage time itself and the image information before and after the timing when the detection signal is output, based on the remaining amount signal from the power supply management unit 12. The recording time to RO and the recording time are controlled respectively.

After that, after the storage time has elapsed, the state management unit 3 stops the distribution / supply of the electric power from the battery unit B and turns off the power supply of the drive recorder DR as a whole.

Next, regarding the recording process of the image information in the non-volatile unit RO (hereinafter, simply referred to as “recording process according to the embodiment”) in the drive recorder DR according to the embodiment, specifically, with reference to FIGS. 3 and 4. explain. The recording process according to the embodiment is mainly executed mainly by the state management unit 3.

The recording process according to the embodiment starts from the timing when the ACC switch of the vehicle equipped with the drive recorder DR is turned on when the electric power is supplied from the external power supply EB via the power receiving unit 11. Will be done. Then, during the operation as the drive recorder DR (step S1), the state management unit 3 monitors whether or not the power from the external power supply EB cannot be received due to the presence or absence of the power cutoff signal (step S1). Step S2). When the power supply from the external power supply EB is continued in the monitoring of step S2 (step S2: NO), the state management unit 3 returns to the above step S1 and continues the normal operation as the drive recorder DR.

On the other hand, when the power cutoff signal is detected during the monitoring of step S2 (step S2: YES), the state management unit 3 switches to the power supply from the battery unit B and waits for the power off as the drive recorder DR (step S2: YES). Step S3), and further, the next start-up information is recorded in the non-volatile unit RO within the waiting time (step S4).

Next, in the state management unit 3, whether or not the detection signal is output from the impact detection unit 2, in other words, the disappearance of the power supply from the external power supply EB monitored in step S2 causes the vehicle to accelerate rapidly. It is determined whether or not it is due to sudden deceleration or the like (step S5). When the detection signal is not output in the determination in step S5 (step S5: NO), it is presumed that the loss of the power supply from the external power supply EB is artificial, for example, so that the state management unit 3 will be described later. The process proceeds to step S9. On the other hand, when the detection signal is output in the determination in step S5 (step S5: YES), the state management unit 3 extends the waiting time so that the storage time is secured (step S6). Then, the state management unit 3 is a non-volatile unit of the image information recorded in the volatile unit RA and the image information from the camera unit 1 (in other words, the image information for the storage time including the timing at which the detection signal is output). Recording to the RO is started (step S7), and after recording the required amount, this is ended (step S8). At this time, the state management unit 3 determines the recording time of the image information (that is, the transfer time from the volatile unit RA) before the timing at which the detection signal is output, based on the remaining amount signal from the power supply management unit 12. The recording time of the image information after the timing from the camera unit 1 is adjusted.

Here, the adjustment of each recording time will be specifically described with reference to FIG. In FIG. 4, the remaining electric energy of the battery unit B is "remaining amount", the recording time of the image information before the timing at which the detection signal is output is "before detection", and the recording of the image information after the timing. The time is expressed as "after detection" respectively.

As illustrated in FIG. 4A, the holding time is controlled to change based on the amount of remaining power of the battery unit B. More specifically, the holding time is controlled so that the smaller the remaining power amount of the battery unit B, the shorter the holding time. Then, for example, when the remaining power amount of the battery unit B is close to 100%, the holding time is set to 20 seconds as described above. In this case, within the storage time, the ratio of the recording time of the image information before the timing when the detection signal is output to the recording time of the image information after the timing is approximately 3: 2 (specifically, , 12 seconds: 8 seconds). If each recording time based on the above ratio has a fraction after the decimal point, each recording time is set by rounding, for example. If the remaining power of the battery unit B at the timing when the detection signal is output is small and the storage time must be shortened, the ratio of each recording time is set to approach 1: 1, for example. NS. As illustrated in FIG. 4B, when a so-called margin as a storage time is added by 2 seconds, each of the above recording times is also set to be about 1 second longer. In this way, the reason why the recording time of the image information before the timing when the detection signal is output is set longer than the recording time of the image information after the timing is an ex post facto cause such as sudden acceleration or sudden deceleration. The reason is that it is important to record the behavior of the vehicle up to the sudden acceleration or deceleration, such as the traveling direction of the vehicle immediately before the sudden acceleration or deceleration, in the investigation or the like. The relationship between the recording time of the image information before the timing at which the detection signal is output and the recording time of the image information after the timing can be arbitrarily set, and indicates each of the set recording times. The information is preferably recorded in, for example, the non-volatile unit RO in a table-like manner shown in FIG. 4, for example. Further, depending on the subsequent use of the image information recorded in the non-volatile unit RO, the recording time of the image information after the timing at which the detection signal is output is set to zero, and the recording time of the image information before the timing is set to zero. It may be configured to be set longer.

When the recording of the required amount of image information in the non-volatile unit RO is completed by the processing up to step S8 (see step S8), the state management unit 3 then determines the elapse of the waiting time (step S9). If the waiting time has not elapsed in the determination in step S9 (step S9: NO), the state management unit 3 returns to step S3 and repeats the series of processes described above. On the other hand, when the image information is recorded in the non-volatile unit RO, the standby time has also elapsed (step S9: YES), so the state management unit 3 turns off the power as the drive recorder DR (step S9: YES). Step S10), the recording process according to the embodiment is completed.

As described above, according to the recording process according to the embodiment, when the detection is applied to an acceleration equal to or higher than the predetermined value within the standby time, the standby time is extended and the power supply from the battery unit B is continued. Therefore, when an acceleration equal to or higher than a predetermined value is detected due to, for example, sudden acceleration or sudden deceleration, it is possible to reliably record image information that will be required later. Further, since the standby time is extended when an acceleration of a predetermined value or more is detected within the standby time, it is possible to suppress the occurrence of unnecessary power consumption by extending the standby time until it is unnecessary.

Further, since the recording of the image information is continued until the end of the extended standby time (in other words, the end of the storage time), the image information corresponding to the desired recording time can be recorded.

Furthermore, after the power supply from the external power supply EB is stopped, the power from the battery unit B is supplied until the end of the standby time, so that the next start-up information and the image information are surely recorded until the end of the standby time. Can be done.

Further, since the time corresponding to the extension of the standby time is controlled based on the remaining amount of the battery unit B, necessary information can be reliably recorded according to the remaining amount of the battery unit B. Further, at this time, as the remaining amount of the battery unit B is smaller, the time corresponding to the extension is controlled to be shorter (see FIG. 4), so that necessary information is recorded more reliably according to the remaining amount of the battery unit B. be able to.

Furthermore, within the storage time, the recording time of the image information before the timing when the detection signal is output is set longer than the recording time of the image information after the timing, so that the acceleration equal to or higher than the default value is detected. It is possible to more reliably record the image information that will be required later in relation to what has been done.

Further, since the image information is recorded in the non-volatile unit RO, it is possible to reliably record the image information after the acceleration of the predetermined value or more is applied.

In the above-described embodiment, the non-volatile unit RO is to record the next start-up information and the image information, but in addition to this, the voice information (sound information) in the same time zone as the image information and the impact. Information indicating a specific value or direction of the acceleration detected by the detection unit 2 may also be recorded.

Further, in the above-described embodiment, the impact detection unit 2 is equipped with a drive recorder DR (in other words, a drive recorder DR) having an acceleration of a predetermined magnitude and direction due to an impact caused by sudden acceleration or deceleration of the vehicle. When applied to the vehicle), it was decided to generate a detection signal to that effect. However, the impact detection unit 2 is not limited to the sudden acceleration and deceleration described above, and when it is detected that an acceleration of a preset magnitude and direction is applied, it generates a detection signal to that effect. I wish I could.

Further, in the above-described embodiment, both the recording process during the standby time and the recording process during the extended storage time are performed by supplying power from the battery unit B, but in addition to this, recording during the standby time is performed. The processing may be performed by the delay circuit related to the power-off of the drive recorder DR, and only the recording processing during the storage time may be performed by the power supply from the battery unit B.

Furthermore, when the power of the drive recorder DR itself is turned off while the image information is being recorded from the camera unit 1 to the non-volatile unit RO, the state management unit 3 requests the camera unit 1 to interrupt the recording. It is preferable to transmit a signal to that effect.

Further, the program corresponding to the flowchart shown in FIG. 3 is recorded on a recording medium such as an optical disk or a hard disk, or acquired via a network such as the Internet, and read out to a general-purpose microcomputer or the like. By executing this, it is possible to make the microcomputer or the like function as the state management unit 3 according to the embodiment.

1 Acquisition means (camera unit)
2 Detection means (impact detection unit)
3 Recording control means (state management unit)
4 Stop control means R Recording means (recording unit)
S Information recording device B Battery part RA Volatile part RO Non-volatile part DR Drive recorder EB External power supply

Claims (1)

An information recording device that controls recording of recorded information to a recording means according to the detected acceleration.
An acquisition means for acquiring at least one of image information and sound information as the recorded information, and
A stop control means that stops the power supply when a preset standby time elapses after the power supply from the outside is stopped.
Equipped with
An information recording device characterized in that the standby time can be extended.

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