JP2013206417A - On-vehicle recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle recorder capable of accurately recognizing a situation of a location where a vehicle is located.SOLUTION: A CPU 11 inside a drive recorder 10 acquires speed data detected by a speed sensor 30, a G value detected by a G sensor 40, and altitude data corresponding to atmospheric pressure data detected by a slope detection unit 50, and records them in an image memory 14 (S1). When the G value exceeds a threshold when determining whether or not an accident has occurred, the CPU 11 performs video recording processing of superimposing the altitude data and gradient data on image data recorded in the image memory 14 and recording them in the image memory 14 (S3). In the video recording processing, the CPU 11 superimposes and records the altitude data and the gradient data acquired at the same time as the photographing time on video images (image data) for prescribed time that are photographed before accident occurrence and recorded.

Description

  The present invention relates to an in-vehicle recording device mounted on a vehicle.

  Conventionally, as a drive recorder that is this type of in-vehicle recording device, a type that starts with the ignition ON and always records when the vehicle is operating, and a G value is generated when the G value from the G sensor exceeds the set value There is a type that records the time before and after.

  The image recorded by the drive recorder varies depending on the set position of the camera, such as the front, rear, or interior of the vehicle. The image recorded by the drive recorder is useful for analyzing and analyzing the cause of the accident.

  As this type of prior art, the driving situation information obtained during driving is saved in time series, a trigger signal is output when it is determined to be a dangerous driving state, and the driving situation information at that time is flagged and recorded There is a digital tachograph (see Patent Document 1).

JP 2009-199328 A

  However, the conventional in-vehicle recording device has the following problems. When analyzing and analyzing the cause of an accident, if the accident site is in the middle of a hill, it is assumed that the vehicle is tilted parallel to the road. It was not possible to accurately grasp the slope and length of

  Thus, from the video recorded on the drive recorder, the slope of the road surface on which the vehicle is traveling cannot be determined.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an in-vehicle recording apparatus that can accurately grasp the situation of a place where a vehicle is located.

In order to achieve the above-described object, the in-vehicle recording apparatus according to the present invention is characterized by the following (1) to (5).
(1) An in-vehicle recording device mounted on a vehicle,
Photographing means for photographing the outside or the inside of the vehicle;
Recording means for recording an image taken by the photographing means;
Obtaining means for obtaining information on a gradient of a place where the vehicle is located;
Recording control means for superimposing and recording information relating to the gradient acquired by the acquisition means on the image recorded by the recording means;
Be provided.
(2) The in-vehicle recording device having the configuration of (1) above,
The acquisition unit includes an atmospheric pressure detection unit that detects an atmospheric pressure of a place where the vehicle is located, calculates an altitude from the atmospheric pressure detected by the atmospheric pressure detection unit, records the altitude according to a travel distance, Calculating the gradient from a change in altitude corresponding to the distance;
(3) An in-vehicle recording device having the configuration of (1) above,
The acquisition means includes pitch angle detection means for detecting a pitch angle of the vehicle, and acquires information related to the gradient from the pitch angle.
(4) The in-vehicle recording device having the configuration of (1) above,
Further comprising impact sensing means for sensing an impact applied to the vehicle;
The recording control means records the information related to the gradient superimposed on the image from a predetermined time before the time when the impact sensing means senses the impact.
(5) The in-vehicle recording device having any one of the above configurations (1) to (4),
And further comprising display means for displaying an image on which the information related to the gradient is superimposed and recorded.

According to the in-vehicle recording devices of the above (1) to (3), since the information regarding the gradient is superimposed and recorded on the captured image, the situation of the place where the vehicle is located can be accurately grasped.
According to the in-vehicle recording device of the above (4) or (5), when an accident occurs on a slope, it can be used for analyzing and analyzing the cause of the accident site.

  According to the present invention, since the information regarding the gradient is superimposed and recorded on the captured image, the situation of the place where the vehicle is located can be accurately grasped. Therefore, when an accident occurs on a slope, it can be used for analyzing and analyzing the cause of the accident site.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a diagram showing a configuration of a drive recorder system 1 in the embodiment. FIG. 2 is a diagram illustrating a configuration of the slope detection unit 50. 3 (A) and 3 (B) are graphs showing the relationship between altitude and atmospheric pressure (FIG. 3 (A)) and the condition of the hill (FIG. 3 (B)). FIG. 4 is a diagram illustrating an example of an image on which information such as a gradient is superimposed. FIG. 5 is a flowchart showing a recording operation procedure of the drive recorder 10. FIG. 6 is a diagram showing a screen of the display device 60 that displays the video output from the drive recorder 10. FIGS. 7A and 7B are diagrams illustrating other screen examples of the window 61 that displays an image captured by the camera 20a.

  An in-vehicle recording apparatus according to an embodiment of the present invention will be described with reference to the drawings. The in-vehicle recording device of this embodiment is applied to a drive recorder.

  FIG. 1 is a diagram showing a configuration of a drive recorder system 1 in the embodiment. The drive recorder system 1 includes a drive recorder 10, a camera 20, a speed sensor 30, a G sensor 40, a slope detection unit 50, and a display device 60.

  The drive recorder 10 records data such as video and speed, and includes a CPU 11, a ROM 12, a RAM 13, an image memory 14, and various interfaces (I / F) 15, 16, 17, 18, and 19.

  In the image memory 14, image data of a video taken by the camera 20 is recorded, and vehicle speed data detected by the speed sensor 30 is recorded. The ROM 12 stores a table indicating the relationship between atmospheric pressure and altitude in addition to a control program to be described later. The SDRAM (RAM) 13 is used as a work memory.

  Connected to the interface 16 are five cameras 20 for photographing the exterior and interior of the vehicle. Each of the five cameras 20 includes a camera 20a that captures the front of the vehicle, cameras 20b and 20c that respectively capture the left and right sides of the vehicle, a camera 20d that captures the rear of the vehicle, and a camera 20e that captures the interior of the vehicle. . The camera 20a for photographing the front of the vehicle and the camera 20e for photographing the vehicle interior may be attached to the housing of the drive recorder 10.

  Connected to the interface 17 is a G sensor 40 (impact detection means) for detecting the acceleration of the vehicle and detecting an impact applied to the vehicle. A speed sensor 30 for detecting the speed of the vehicle is connected to the interface 18. The interface 18 may be connected to various sensors (not shown) such as an engine speed sensor, a handle angle sensor, a winker switch, and a brake switch.

  Connected to the interface 19 is a display device 60 for displaying images taken by the camera 20 and various data. The display device 60 may be mounted on the drive recorder 10.

  The interface 15 is connected to a slope detection unit 50 that detects the situation of the slope. FIG. 2 is a diagram showing the configuration of the slope detection unit 50. The slope detection unit 50 includes a CPU 51, an EEPROM 52, an atmospheric pressure sensor 53, a terminal 56, interface (I / F) circuits 55, 57, 58, 59, and the like. As the atmospheric pressure sensor 53 (atmospheric pressure detecting means), for example, a capacitance type or vibration type sensor that uses a semiconductor such as silicon and outputs an electric signal representing an atmospheric pressure value may be used.

  The CPU 51 performs serial communication with the drive recorder 10 through the terminal 56 and the I / F circuits 55 and 57, and calculates and outputs the atmospheric pressure data 75 based on the signal value detected by the atmospheric pressure sensor 53. Further, the CPU 51 outputs an up signal 70 or a down signal 71.

  3 (A) and 3 (B) are graphs showing the relationship between altitude and atmospheric pressure (FIG. 3 (A)) and the condition of the hill (FIG. 3 (B)). FIG. 3A shows a graph of altitude data corresponding to barometric pressure data based on a table showing the relationship between barometric pressure and altitude stored in the ROM 12. The vertical axis represents atmospheric pressure and the horizontal axis represents altitude. From this graph, it can be seen that the atmospheric pressure decreases as the altitude increases.

  Moreover, the graph of FIG. 3 (B) shows the state of the slope every 50 m immediately before the accident. The vertical axis represents altitude and the horizontal axis represents travel distance. From this graph, it can be seen that, for example, uphill a has a length of 1200 m and a gradient of 5.2%. On the downhill b, it can be seen that the length is 800 m and the gradient is 5%.

Here, the gradient of the road (location) on which the vehicle is located is calculated according to Equation (1) from the change in altitude with respect to the travel distance. When the change in altitude is positive (plus), it is an uphill, and when it is negative (minus), it is a downhill.
Gradient [%] = 100 * Altitude change [m] / travel distance [m] (1)

  In this way, the road surface gradient can be accurately calculated as an actually measured value from the altitude of the road. Note that the data (length, slope, etc.) representing the slope condition does not need to match the video of several tens of seconds before the accident, and the data representing the slope condition is displayed for the video (image) for an arbitrarily set time. Data). Also, road altitude (altitude) data is usually short for several tens of seconds before an accident, and can be set at a longer arbitrary time.

  FIG. 4 is a diagram illustrating an example of an image on which information such as a gradient is superimposed. As shown in FIG. 4, altitude data and gradient data corresponding to the atmospheric pressure data output from the slope detection unit 50 are displayed on the video (image data) captured by the camera 20 at regular intervals (for example, 1 second). (Including length) is superimposed. That is, an image 81 in which text information 85 of altitude, gradient, and length is embedded in the captured image is obtained.

  The image data is repeatedly recorded in the image memory 14 for a predetermined time by a processing routine different from the superimposition processing. Note that the data recorded by being superimposed on the image data may include speed data and the like in addition to altitude data and gradient data (including length).

  The operation of the drive recorder system 1 having the above configuration will be described. FIG. 5 is a flowchart showing a recording operation procedure of the drive recorder 10. This operation program is stored in the ROM 12, and is executed every predetermined time (for example, 1 second) by the CPU 11 after the ignition is turned on. Further, as described above, in a processing routine different from this processing routine, video (image data) photographed by the camera 20 is always recorded in the image memory 14 repeatedly for a predetermined time.

  First, the CPU 11 acquires altitude data corresponding to the speed data detected by the speed sensor 30, the G value (acceleration value) detected by the G sensor 40, and the atmospheric pressure data detected by the hill detection unit 50, and the image It records in the memory 14 (step S1). At this time, the CPU 11 obtains altitude data corresponding to the atmospheric pressure data with reference to the graph of FIG. By associating the altitude data obtained here with the travel distance obtained from the speed data, a graph representing the state of the slope in FIG. 3B described above can be obtained.

  CPU11 determines whether the G value calculated | required by step S1 exceeded the threshold value at the time of determining whether the accident occurred or not (step S2). As a result of the determination, if the G value is equal to or less than the threshold value, the CPU 11 ends this operation as it is.

  On the other hand, when the G value exceeds the threshold value as a result of the determination, the CPU 11 superimposes the altitude data and the gradient data in step S1 on the image data acquired in another processing routine and recorded in the image memory 14. Then, a video recording process for recording in the image memory 14 is performed (step S3).

  In this video recording process (corresponding to the recording control means), as shown in FIG. 4, the CPU 11 captures the recorded video (image data) for a predetermined time before the occurrence of the accident at the same time as the shooting time. The acquired altitude data and gradient data are superimposed and recorded. That is, gradient data or the like is superimposed on the video from a predetermined time before the accident occurs. Thereafter, the CPU 11 ends this operation.

  As a result, gradient data or the like is added to the image data shot before an impact with the G value exceeding the threshold is applied to the vehicle. Even after the accident occurs, the CPU 11 may superimpose and record the gradient data having the same time on the image data taken after the accident.

  FIG. 6 is a diagram showing a screen of the display device 60 that displays the video output from the drive recorder 10. The screen of the display device 60 is divided into four windows 61, 62, 63 and 64. In the window 61, an image in front of the vehicle photographed by the camera 20a is displayed. In this window 61, in addition to the image in front of the vehicle, altitude, gradient, length (altitude 600 m, gradient 3%, length 500 m) and other data are displayed. Thereby, when investigating the cause of the accident, it is possible to visually recognize the magnitude of the gradient.

  Further, in the window 62, images of the rear, left side, right side, and interior of the vehicle captured by the cameras 20d, 20b, 20c, and 20e are displayed on each of the four sub-screens. The window 63 displays a graph showing changes in vehicle speed, engine speed, left and right, and G values before and after the accident. Various types of vehicle information are displayed in the window 64.

  According to the drive recorder system of this embodiment, when analyzing the accident situation from the video of the drive recorder 10, the slope condition before the accident can be obtained. Therefore, it is possible to investigate the cause of the accident in consideration of the road gradient information, and it is possible to accurately grasp the state of the slope that is the accident site. As described above, when an accident occurs on a slope, the slope information (data) can be used to analyze and analyze the cause of the accident site.

  Further, altitude data can be acquired based on the atmospheric pressure data detected by the slope detection unit 50, and even in a portion not included in the altitude data of the map, such as a viaduct or a descending portion from a dedicated road to a general road, Altitude data can be acquired as measured values.

  The present invention is not limited to the configuration of the above-described embodiment, and any configuration that can achieve the function of the configuration of the present embodiment is applicable.

  For example, FIGS. 7 (A) and 7 (8) are diagrams showing other screen examples of the window 61 displaying the video imaged by the camera 20a. In FIG. 7A, a scale 67 representing a gradient is displayed on the screen of the window 61 together with an instruction mark 67a. In FIG. 7B, text information 68 such as a gradient is displayed on the screen of the window 61 using a augmented reality (AR) technology in a portion representing a road in the video. Thereby, the correspondence between the road and the slope becomes clear.

  In the above embodiment, the road gradient is calculated and acquired based on the change in altitude obtained from the atmospheric pressure data detected by the atmospheric pressure sensor, but may be acquired by other methods. For example, the drive recorder may be equipped with a GPS receiver that detects the current position of a vehicle that detects radio waves from GPS satellites, and a gyro sensor that detects the pitch angle of the vehicle.

  When the gyro sensor is mounted, the pitch angle of the vehicle may be detected using the gyro sensor, and the road gradient may be obtained from the average value of the detected pitch angle or the like (pitch angle detection means). Thereby, the road gradient can be easily obtained without obtaining the altitude of the place where the vehicle is located.

  Further, based on the altitude information included in the GPS data obtained from the GPS receiver, the road gradient may be calculated from the change.

  Furthermore, map data in which altitude data is registered in advance may be stored, and altitude data may be obtained from the current position of GPS data. Further, the slope information may be acquired immediately from the current position by referring to a map in which the slope information corresponding to the current position of the GPS data is registered.

  INDUSTRIAL APPLICABILITY The present invention is useful in an in-vehicle recording device mounted on a vehicle because it can accurately grasp the situation of the place where the vehicle is located.

1 drive recorder system 10 drive recorder 11, 51 CPU
12, 52 ROM
13 RAM
14 Image memory 15, 16, 17, 18, 19 Interface (I / F)
20, 20a, 20b, 20c, 20d, 20e Camera 30 Speed sensor 40 G sensor 50 Slope detection unit 53 Barometric pressure sensor 55, 57, 58, 59 Interface circuit 56 Terminal 60 Display device 61, 62, 63, 64 Window 67 Scale 67a Instruction mark 68, 85 Text information 70 Climbing signal 71 Descent signal 75 Pressure data 81, 91 Image

Claims (4)

An in-vehicle recording device mounted on a vehicle,
Photographing means for photographing the outside or the inside of the vehicle;
Recording means for recording an image taken by the photographing means;
Obtaining means for obtaining information on a gradient of a place where the vehicle is located;
Recording control means for superimposing and recording information relating to the gradient acquired by the acquisition means on the image recorded by the recording means;
A vehicle-mounted recording apparatus comprising:   The acquisition unit includes an atmospheric pressure detection unit that detects an atmospheric pressure of a place where the vehicle is located, calculates an altitude from the atmospheric pressure detected by the atmospheric pressure detection unit, records the altitude according to a travel distance, The in-vehicle recording apparatus according to claim 1, wherein the gradient is calculated from a change in altitude corresponding to the distance. Further comprising impact sensing means for sensing an impact applied to the vehicle;
2. The in-vehicle recording apparatus according to claim 1, wherein the recording control unit records the information related to the gradient superimposed on the image from a predetermined time before the time point when the impact sensing unit senses the impact. The in-vehicle recording device according to any one of claims 1 to 3, further comprising display means for displaying an image recorded by superimposing information on the gradient.

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