JP6923712B2 - Correction device, correction method and program for correction device - Google Patents

Description

The present application belongs to the technical fields of correction devices, correction methods and programs for correction devices. More specifically, it belongs to the technical field of a correction device and a correction method for correcting the output value of a detection means such as an acceleration sensor attached to a moving body, and a program for the correction device.

In recent years, for example, a so-called drive recorder for capturing an image of the front of a moving vehicle and cyclically recording it for the purpose of verifying the situation when an accident occurs later. Is generalized. As a mounting location for such a drive recorder, for example, a drive recorder that has an imaging range in front and also serves as an indoor rear-view mirror (so-called room mirror) is placed on the mirror surface side of the existing indoor rear-view mirror from above. There is a way to attach it to. Further, as another mounting location, a method of installing a single drive recorder on the dashboard and setting the front side as the imaging range and the like can be mentioned. In the following description, the rear-view mirror for indoor use is simply referred to as a "room mirror".

In recent years, drive recorders have a built-in acceleration sensor that detects acceleration generated by, for example, an accident, and have a function to specify video data or audio data to be recorded non-volatilely based on the detection result. There is something that is. In order to realize such a function, since the above-mentioned accident or the like occurs in an instant, high accuracy is required for the detection of the above-mentioned acceleration.

On the other hand, when the drive recorder is a so-called retrofit type (that is, when a drive recorder purchased separately by the user after purchasing the vehicle is attached to the vehicle, etc.), the details of how to attach the drive recorder vary depending on the user. .. Therefore, in this case, the relationship between the mounting posture of the drive recorder (in other words, the direction of the detection axis of the built-in acceleration sensor) and the direction of acceleration that occurs during driving and should be detected differs depending on the user. It will be different. Therefore, in order to accurately / highly accurately detect the acceleration during traveling, it is necessary to perform the process of canceling the influence of the mounting posture that differs depending on the user as described above. Examples of documents that disclose prior art for responding to such a request include the following Patent Document 1. In the technique disclosed in Patent Document 1, the initial value of the built-in acceleration sensor is set (that is, so-called so-called) by manually inputting specific information using a memory switch for instructing various operations. It is configured to be calibrated).

JP 2011-41320

However, in the technique described in Patent Document 1, in order to perform the calibration, the user needs to perform a preset switch operation with the drive recorder attached to the vehicle. And if such a switch operation is necessary, for example, when a commercial drive recorder is frequently attached to and detached from the vehicle, or for example, a general-purpose drive recorder for a rear-view mirror whose angle is adjusted by the driver. When the switch is attached, it is necessary to operate the switch each time, which is very complicated and inconvenient.

Therefore, the present application has been made in view of the above problems and the like, and one example of the problem is that it is possible to accurately correct the acceleration detected by the built-in acceleration sensor without requiring complicated operations. It is an object of the present invention to provide a correction device, a correction method, and a program for the correction device.

In order to solve the above problems, the invention according to claim 1 includes an attachment information acquisition means for acquiring attachment information indicating that the detection means for detecting acceleration is attached to a moving body, and an acquisition of the attachment information. After that, the storage means that stores the correction value set based on the acceleration detected by the detection means until the start of movement of the moving body, and the storage means that stores the correction value stored in the storage means, and the moving body A correction means for correcting the acceleration detected by the detection means after the start of movement is provided.

In order to solve the above problems, the invention according to claim 8 is a correction method executed in a correction device including a detection means for detecting acceleration, and the detection means is attached to a moving body. A mounting information acquisition step of acquiring the indicated mounting information, and a storage step of storing a correction value set based on the acceleration detected by the detection means after the acquisition of the mounting information and before the start of movement of the moving body. A correction step of correcting the acceleration detected by the detection means after the start of movement of the moving body based on the correction value stored in the storage step is included.

In order to solve the above-mentioned problems, the invention according to claim 9 is an attachment information acquisition means for acquiring attachment information indicating that a detection means for detecting acceleration is attached to a moving body, the attachment information. Based on the storage means that stores the correction value set based on the acceleration detected by the detection means and the correction value stored in the storage means after the acquisition of the moving body and before the start of movement of the moving body. It functions as a correction means for correcting the acceleration detected by the detection means after the start of movement of the moving body.

It is a block diagram which shows the outline structure of the correction apparatus which concerns on embodiment. It is a figure which illustrates the appearance of the drive recorder which concerns on embodiment, (a) is the external perspective view of the rearview mirror to which the drive recorder is attached, (b) is the external perspective of the drive recorder seen from the front diagonally. FIG. 3C is an external perspective view of the drive recorder as viewed from an oblique rear view, and FIG. 3D is an external perspective view showing a state after the drive recorder is attached to a rear-view mirror. It is a figure which illustrates the mounting state of the drive recorder which concerns on embodiment, (a) is the external perspective view which looked at the drive recorder from the rear oblique view before mounting on a rearview mirror, (b) is a view to the rearview mirror. It is an external perspective view which saw the state of each part of the drive recorder at the time of attachment from the rear view obliquely, and (c) is the external perspective view which shows the state of the drive recorder after attachment to a rearview mirror. It is a figure which shows the operation of the detection switch which concerns on embodiment, (a) is the side view which shows the state of the fixed arm and the movable arm before mounting on a rearview mirror, (b) is before mounting on a rearview mirror. It is a rear view which shows the state of a fixed arm and a movable arm of, (c) is a side view which shows the state of a fixed arm and a movable arm after attachment to a rearview mirror, and (d) is an attachment to a rearview mirror. It is a rear view which shows the state of the fixed arm and the movable arm after. It is a block diagram which shows the detailed structure of the drive recorder which concerns on Example. It is a flowchart which shows the initialization process in the drive recorder which concerns on 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 correction device according to the embodiment.

As shown in FIG. 1, the correction device S according to the embodiment is configured to include an attachment information acquisition means 1, a storage means 14, and a correction means 3, and the storage means 14 and the correction means 3 include. It is connected to the detection means AS that detects the acceleration.

In this configuration, the mounting information acquisition means 1 acquires mounting information indicating that the detecting means AS has been mounted on the moving body.

The storage means 14 stores the correction value set based on the acceleration detected by the detection means AS after the acquisition of the mounting information by the mounting information acquisition means 1 and before the start of movement of the moving body.

On the other hand, the correction means 3 corrects the acceleration detected by the detection means AS after the start of movement of the moving body based on the correction value stored in the storage means 14.

As described above, according to the operation of the correction device S according to the embodiment, the correction value set based on the acceleration detected by the detection means AS after the acquisition of the mounting information and the start of the movement of the moving body is stored. At the same time, based on the correction value stored in the storage means 14, the acceleration detected by the detection means AS after the start of movement of the moving body is corrected. Therefore, the acceleration can be accurately corrected after the start of movement, which requires accurate detection of the acceleration, without requiring complicated operations.

Next, specific examples corresponding to the above-described embodiments will be described with reference to FIGS. 2 to 6. The embodiment described below is an example in which the embodiment is applied to the initialization process of the acceleration sensor built in the drive recorder that is also used as an indoor rearview mirror and is mounted on the rearview mirror. ..

Further, FIG. 2 is a diagram illustrating the appearance and the like of the drive recorder according to the embodiment, FIG. 3 is a diagram illustrating an attached state of the drive recorder, and FIG. 4 shows the operation of the detection switch according to the embodiment. It is a figure. Further, FIG. 5 is a block diagram showing a detailed configuration of the drive recorder according to the embodiment, and FIG. 6 is a flowchart showing an initialization process in the drive recorder. At this time, in FIGS. 2 to 5, for each of the constituent members of the embodiment corresponding to each constituent member in the correction device S according to the embodiment shown in FIG. 1, the same member number as each constituent member in the correction device S is assigned. I am using it.

As shown in FIGS. 2 and 3, the drive recorder DR according to the embodiment is used by being mounted on the rearview mirror RM so as to cover the mirror surface of the rearview mirror RM whose appearance is illustrated in FIG. 2A. It is a type of drive recorder. As shown in FIG. 2B, the drive recorder DR according to the embodiment includes a mirror surface ML including an operation unit TP including a touch panel and a display unit DP having various information display functions. It is prepared in front of it. On the other hand, as shown in FIG. 2C, the drive recorder DR has two fixed arm FHs and two movable arm MHs for mounting the drive recorder DR itself on the mirror surface of the rearview mirror RM and attaching the drive recorder DR to the rearview mirror RM. They are equipped with one by one, for example, a wide-angle camera 10. At this time, each movable arm MH is urged downward in FIG. 2 by a spring or the like (not shown). Then, when the entire drive recorder DR is pulled downward with the lower surface of the eaves at the upper end of the movable arm MH hooked on the upper side (outside the upper end) of the mirror surface of the rearview mirror RM, each movable arm MH moves upward in FIG. .. Then, in this state, the entire drive recorder DR is rotated downward to fit the upper surface of the eaves of each fixed arm FH into the lower side (outside the lower end) of the rearview mirror RM, as shown in FIG. 2D. The drive recorder DR is attached to the rearview mirror RM. This mounting operation is manually performed by a user such as a driver. The operation of attaching the rear-view mirror to the rear-view mirror RM will be described more specifically with reference to FIG. 3. As shown in FIG. It remains in the initial position while being urged. Then, as described above, when the entire drive recorder DR is pulled downward with the lower surface of the eaves at the upper end of the movable arm MH hooked on the upper side of the mirror surface of the rearview mirror RM, as shown in FIG. The movable arm MH moves upward in FIG. Then, in this state, the entire drive recorder DR is rotated downward to fit the upper surface of the eaves of each fixed arm FH into the lower side of the rearview mirror RM, so that the drive recorder DR can be as shown in FIG. 3C. It is attached to the rearview mirror RM.

Next, the operation of the detection switch according to the embodiment at the time of mounting the drive recorder DR described with reference to FIGS. 2 and 3 will be described with reference to FIG. The detection switch according to the embodiment is a switch that detects that the drive recorder DR according to the embodiment is attached to the rear-view mirror RM, as will be described in detail later.

That is, as shown in FIGS. 4 (a) and 4 (b), the detection switch 13 according to the embodiment is the drive recorder DR itself because the protrusion 13a is physically pushed into the main body side of the detection switch 13. Functions as a power switch for. Further, the detection switch 13 is a detection switch that outputs an ON signal when the protrusion 13a is pushed in, and is provided on the back surface of the drive recorder DR beside one of the movable arms MH. Before the drive recorder DR is attached to the rear-view mirror RM, the notch C provided at the center of the movable arm MH is at a position other than the position of the detection switch 13. On the other hand, when the drive recorder DR is attached to the rear-view mirror RM, the protrusion 13a is formed by the notch C as the movable arm MH moves (see the white arrows in FIGS. 4 (c) and 4 (d)). When pressed against the main body of the detection switch 13, power is supplied to the drive recorder DR itself, and the detection switch 13 outputs the on signal. By this on signal, the control unit described later detects that the drive recorder DR is attached to the rearview mirror RM.

Next, in the drive recorder DR according to the embodiment, the initialization process according to the embodiment will be specifically described with reference to FIGS. 5 and 6 and the like.

As shown in FIG. 5, the drive recorder DR according to the embodiment includes a CPU, a ROM (Read Only Memory), and a RAM (Random Access Memory) in addition to the camera 10, the detection switch 13, the display unit DP, and the operation unit TP described above. ), Etc., a measurement unit 11, a microphone 12, an event detection unit AS, a storage unit 14, and a power supply unit (not shown). At this time, the control unit 1 corresponds to an example of the mounting information acquisition means 1 and the correction means 3 according to the embodiment, the storage unit 14 corresponds to an example of the storage means 14 according to the embodiment, and the event detection unit AS executes. It corresponds to an example of the detection means AS according to the form. Then, as shown by the broken line in FIG. 5, the control unit 1, the storage unit 14, and the event detection unit AS constitute an example of the correction device S according to the embodiment.

In the above configuration, the operation unit TP is configured by a touch panel or the like on the front surface (front surface) of the drive recorder DR as described above, receives an operation by the user, and outputs an operation signal corresponding to the operation to the control unit 1. do. Further, the display unit DP displays information to be presented to the user as a function of the drive recorder DR under the control of the control unit 1, using, for example, an image or an icon. Next, the measuring unit 11 detects the current position, speed, traveling direction, etc. of the vehicle to which the drive recorder DR is attached by using, for example, GPS (Global Positioning System) or autonomously, and controls each detection result. Output to part 1. Next, under the control of the control unit 1, the microphone 12 collects, for example, the sound or voice in the vehicle to which the drive recorder DR is attached, and outputs the detection result to the control unit 1. In addition, the event detection unit AS uses an acceleration sensor (not shown) to give an impact to the drive recorder DR (and by extension, the vehicle to which it is attached) that exceeds a preset value, or an event such as sudden steering or sudden braking in the vehicle. And its occurrence state are detected, and the detection result is output to the control unit 1. At this time, the acceleration sensor in the event detection unit AS is along the three axes (X-axis, Y-axis, and Z-axis) shown in FIG. 2A in relation to the external perspective view of the drive recorder DR viewed from the front obliquely. , The acceleration applied to the drive recorder DR is detected, and the occurrence of each of the above events and the occurrence state thereof are detected based on them. On the other hand, the detection switch 13 generates the above-mentioned on signal indicating that the drive recorder DR is attached to the rearview mirror RM and outputs it to the control unit 1 by the operation as described with reference to FIG. Finally, the storage unit 14 is composed of, for example, a non-volatile memory such as an SSD (Solid State Drive). Then, under the control of the control unit 1, the storage unit 14 stores the image data taken by the camera 10 or the sound data by the microphone 12 at the timing when any event is detected by the event detection unit AS. The imaging data or the like stored in the storage unit 14 is used, for example, for post-mortem verification of an accident or the like. Then, in addition to controlling the operation as the drive recorder DR described above, the control unit 1 executes the initialization process according to the embodiment described in detail with reference to FIG. 6, and attaches the drive recorder DR to the rearview mirror RM. At times, the acceleration sensor in the event detection unit AS is initialized. In addition to this, the control unit 1 acquires the corrected acceleration used for the correction of the acceleration sensor after the initialization and stores it in the storage unit 14.

Next, the initialization process according to the embodiment, which is executed in the drive recorder DR according to the embodiment having the above-described configuration, will be collectively described with reference to FIG.

As shown in FIG. 6, in the initialization process according to the embodiment, when the protrusion 13a is pressed toward the main body side of the detection switch 13 by completing the operation of attaching the drive recorder DR to the rearview mirror RM. As a result, power is supplied to the drive recorder DR from the power supply unit, and the on signal is output from the detection switch 13 by the pressing (step S1). Next, the control unit 1 turns on the acceleration sensor in the event detection unit AS (step S2), and the drive recorder DR sets the acceleration (fluctuation) in the Z direction (see FIG. 2B) in the acceleration sensor. It is determined whether or not the fluctuation is within a predetermined range preset as a determination threshold value as to whether or not the sensor is mounted along the substantially vertical direction (that is, substantially vertically) (step S3). In the determination of step S3, when the acceleration (fluctuation) in the Z direction is within the predetermined range (step S3: YES), assuming that the drive recorder DR is attached substantially vertically to the rearview mirror RM, then The control unit 1 performs an operation for adjusting the angle of the drive recorder DR (that is, the rear-view mirror RM) by the user for each acceleration (variation) in the three-axis directions (see FIG. 2B) of the acceleration sensor. It is determined whether or not the fluctuation is within a predetermined fluctuation range set in advance as a determination threshold for whether or not the acceleration is changed (in other words, whether or not the acceleration is fluctuating due to the operation) (step S4). In the determination of step S4, when the acceleration (variation) in each direction is a fluctuation less than the predetermined fluctuation range (step S4: YES, including the case where the fluctuation is zero), the drive recorder to the room mirror RM. Assuming that the DR mounting operation is completed, the control unit 1 then applies the acceleration in each axial direction (if fluctuating, its average value or standard deviation, etc.) output from the acceleration sensor at that timing. After the acceleration sensor is initialized (including after the vehicle to which the drive recorder DR is attached starts moving), the storage unit 14 stores the corrected acceleration used for the correction of the acceleration sensor, and the acceleration in each axial direction is stored. Initialize (step S5). After that, the control unit 1 determines whether or not the on signal from the detection switch 13 is interrupted due to, for example, the drive recorder DR being removed from the rearview mirror RM, and thus whether or not the power supply as the drive recorder DR is turned off. Is determined (step S8). In the determination of step S8, when the power supply as the drive recorder DR is turned off due to the interruption of the on signal (step S8: YES), the control unit 1 ends the initialization process according to the embodiment as it is. On the other hand, in the determination of step S8, when the on signal is continuously output (step S8: NO), the control unit 1 returns to step S2 and repeats the initialization process described above. Normally, the movement of the vehicle to which the drive recorder DR is attached is started after the step S8, and the output of the acceleration sensor at the time of the movement is corrected by using the correction acceleration, and the event detection unit AS normally corrects the output. The various events (that is, the state of the vehicle) will be detected.

On the other hand, when the acceleration (fluctuation) in the Z direction is not within the predetermined range in the determination of step S3 (step S3: NO), or the acceleration (variation) in each direction is determined in step S4. If the fluctuation is not less than the predetermined fluctuation range (step S4: NO), the control unit 1 starts the drive recorder from the timing when the acceleration sensor is turned on in the step S2 (in other words, the timing when the drive recorder DR is attached). It is determined whether or not a predetermined predetermined time has elapsed for the purpose of waiting for a time for adjusting the mounting angle or the like as the DR (step S6). In the determination of step S6, if the predetermined time has not elapsed from the timing when the acceleration sensor is turned on (step S6: NO), the control unit 1 returns to step S3 and repeats the above-described processing.

On the other hand, in the determination of step S6, when the predetermined time has elapsed from the timing when the acceleration sensor is turned on (step S6: YES), the control unit 1 may complete the initialization process according to the embodiment. For example, a display on the display unit DP or a voice through a speaker (not shown) is used to notify that the initialization cannot be performed (step S7). After that, the control unit 1 shifts to the above step S8.

As described above, according to the initialization process according to the embodiment, the acceleration sensor in the event detection unit AS is initialized after the output of the on signal and before the start of movement of the vehicle, and after the output and at the initial stage. The acceleration detected up to the conversion is acquired as a correction acceleration for correcting the acceleration detected after the initialization. Therefore, the acceleration sensor can be initialized in the same mounting state as after the start of movement, which requires accurate acceleration detection, without requiring complicated operations, and the correction acceleration for correction after the initialization can be performed. Is obtained, and by using the corrected acceleration after the initialization, the acceleration after the initialization is completed can be corrected and accurately detected.

Further, when the acceleration detected after the output of the on signal and before the start of movement of the vehicle satisfies the predetermined stabilization condition (see step S3 and step S4 of FIG. 6), the initialization is performed, so that the acceleration sensor is accurate. Can be initialized to. Further, since the acceleration satisfying the stabilization condition is acquired as the correction acceleration (see step S5 in FIG. 7), it is possible to acquire the correction acceleration capable of accurately correcting the acceleration after the initialization is completed.

Further, since the stabilization condition includes that the acceleration detected in the Z direction is within a predetermined range defined for the Z direction (see step S3 in FIG. 7), the acceleration sensor is accurate in accordance with the Z direction. The accelerometer can be initialized more accurately based on the fact that it is attached to.

Furthermore, the stabilization condition further includes that each of the accelerations in the three axial directions is less than the predetermined predetermined threshold value (see step S4 of FIG. 7), and the acceleration in each direction is less than the threshold value. Since each of the above is acquired as the correction acceleration (see step S5 in FIG. 7), it is possible to acquire the correction acceleration that can more accurately correct the acceleration after the initialization is completed.

Further, the acceleration sensor is initialized within a predetermined time when the time measurement is started when the on signal is output (in other words, when the acceleration sensor is turned on (see step S2 in FIG. 7)), and the predetermined time is determined. Since the acceleration satisfying the stabilization condition within the time is acquired as the corrected acceleration (see step S5 in FIG. 7), the acceleration sensor can be initialized and the corrected acceleration can be quickly acquired.

Further, even if the drive recorder DR including the acceleration sensor is attached to the rear-view mirror RM of the vehicle, the acceleration sensor is initialized in the same state as after the start of movement, and after the initialization (after the start of movement). It is possible to obtain a corrected acceleration that can accurately correct the acceleration (including).

Furthermore, after the initialization is completed, the state of the vehicle can be detected accurately based on the corrected acceleration.

In the above-described embodiment, the embodiment is applied to the case where the drive recorder DR is mounted on the mirror surface of the rear-view mirror RM, but in addition to this, for example, when the drive recorder DR is mounted on the dashboard, it is turned on by the mounting operation. By using the detection switch that outputs a signal, it is possible to apply the embodiment even when the drive recorder DR is mounted on the dashboard.

Further, a program corresponding to the flowchart shown in FIG. 6 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 control unit 1 according to the embodiment.

1 Mounting information acquisition means (control unit)
3 Correction means 14 Storage means (storage unit)
10 Camera 13 Detection switch 13a Protrusion C Notch RM Room mirror DR Drive recorder MH Movable arm FH Fixed arm AS Event detection unit

Claims (9)

Mounting information acquisition means for acquiring mounting information indicating that the detection means for detecting acceleration is attached to the moving body, and
A storage means for storing a correction value set based on the acceleration detected by the detection means after the acquisition of the mounting information and before the start of movement of the moving body.
Based on the correction value stored in the storage means, the correction means for correcting the acceleration detected by the detection means after the start of movement of the moving body, and the correction means.
A correction device characterized by being provided with. In the correction device according to claim 1,
When the post-mounting acceleration, which is the acceleration detected by the detection means after the acquisition and before the start of movement, satisfies a preset stabilization state corresponding to the stabilization state of the detection means. A correction device for storing the correction value set based on the post-mounting acceleration. In the correction device according to claim 2,
The stabilization condition is that the vertical post-mounting acceleration, which is the post-mounting acceleration detected by the detection means as the vertical acceleration, is within the range of the vertical post-mounting acceleration set in advance for the vertical direction. A correction device characterized by including. In the correction device according to claim 3,
The stabilization condition further includes that each of the post-mounting acceleration detected in the vertical direction and the post-mounting acceleration detected in the direction orthogonal to the vertical direction is less than a preset threshold value.
The storage means is a correction device for storing the correction value set based on each of the post-mounting accelerations in each of the directions that are less than the threshold value. In the correction device according to any one of claims 2 to 4.
The storage means is a correction device that stores the correction value within a preset time at which time counting is started when the mounting information is acquired. In the correction device according to any one of claims 1 to 5.
The moving body is a vehicle
A correction device characterized in that the detection means is a detection means attached to an indoor rearview mirror of the vehicle. In the correction device according to claim 1 to 6,
A correction device further comprising a state detecting means for detecting the state of the moving body based on the correction result of the correction means for the acceleration detected by the detecting means after the start of movement of the moving body. A correction method performed in a correction device including a detection means for detecting acceleration.
The mounting information acquisition step of acquiring mounting information indicating that the detecting means is mounted on the moving body, and
A storage step of storing a correction value set based on the acceleration detected by the detection means after the acquisition of the mounting information and before the start of movement of the moving body.
A correction step of correcting the acceleration detected by the detection means after the start of movement of the moving body based on the correction value stored in the storage step.
A correction method characterized by including. Computer,
Mounting information acquisition means for acquiring mounting information indicating that the detecting means for detecting acceleration is attached to the moving body,
A storage means that stores a correction value set based on the acceleration detected by the detection means after the acquisition of the mounting information and before the start of movement of the moving body, and a storage means.
A correction means that corrects the acceleration detected by the detection means after the start of movement of the moving body based on the correction value stored in the storage means.
A program for a correction device, which is characterized in that it functions as a correction device.

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