WO2009041721A1 - Enregistreur de conduite - Google Patents

Enregistreur de conduite Download PDF

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Publication number
WO2009041721A1
WO2009041721A1 PCT/JP2008/067981 JP2008067981W WO2009041721A1 WO 2009041721 A1 WO2009041721 A1 WO 2009041721A1 JP 2008067981 W JP2008067981 W JP 2008067981W WO 2009041721 A1 WO2009041721 A1 WO 2009041721A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive recorder
video information
recording
recording element
value
Prior art date
Application number
PCT/JP2008/067981
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Motojima
Fujio Tonokawa
Ryuichi Morimoto
Atsushi Ishimizu
Akira Tsukamoto
Original Assignee
Fujitsu Ten Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2007255819A external-priority patent/JP4684272B2/ja
Priority claimed from JP2007255877A external-priority patent/JP4531085B2/ja
Application filed by Fujitsu Ten Limited filed Critical Fujitsu Ten Limited
Publication of WO2009041721A1 publication Critical patent/WO2009041721A1/fr

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841—Registering performance data
    • G07C5/0875—Registering performance data using magnetic data carriers
    • G07C5/0891—Video recorder in combination with video camera
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/002—Analysing tachograph charts

Definitions

  • the present invention relates to a drive recorder, and more particularly to a drive recorder having a reproduction mode capable of reproducing video information recorded on a recording element.
  • a vehicle-mounted video recording device that captures images of the surroundings of a vehicle using a camera installed in the vehicle and records the surrounding image and vehicle speed when an impact is applied to the vehicle, such as a collision or sudden braking, so-called drive A recorder has been proposed.
  • drive A recorder By installing a drive recorder in the vehicle, it is possible to verify the cause of the accident by analyzing the recorded information when an accident occurs.
  • the driver's awareness of safe driving can be improved, and the video recording the daily driving situation can be used for safety driving guidance.
  • Patent Documents 1 and 2 disclose a drive recorder that cyclically stores video captured by an in-vehicle camera and records the video stored in the event of an accident on another recording medium.
  • Patent Documents 3 and 4 disclose a drive recorder that circulates and stores travel data such as vehicle speed and shift position of a transmission, and records the travel data stored when an accident occurs on another recording medium.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 6 3-1 6 7 8 5
  • Patent Document 2 Japanese Patent Application Laid-Open No. 06-2 3 7 4 6 3
  • Patent Document 3 Japanese Patent Application Laid-Open No. 06-3 3 1 3 9 1.
  • Patent Document 4 Japanese Patent Application Laid-Open No. 06-186060 1 Disclosure of Invention
  • the drive recorder is controlled to record the video information on the recording element by determining that the recording condition is satisfied when the vehicle is subjected to a large acceleration or the like. Normally, the recording element is transferred to a dedicated playback device installed in the headquarters, etc., and the recorded video information is transferred and played back on the playback device, and its contents are verified.
  • the video information recorded on the recording element, etc. must be removed if the recording element is removed from the drive recorder and transported to a location where a playback device such as the head office I could not confirm.
  • an object of the present invention is to provide a drive recorder that can reproduce video information recorded on a recording element.
  • a drive recorder according to the present invention includes a first detection unit that detects that a recording element has been inserted into the drive recorder, a second detection unit that detects whether or not the recording element is in a write-protected state, 1 When the detector detects that the recording element has been inserted into the drive recorder, the second detector detects that the recording element is in a write-protected state. And a control unit that controls the drive recorder to operate in a playback mode for playing back video information.
  • the drive recorder according to the present invention is driven in a playback mode for playing back video information recorded in the recording element when it is detected that the recording element is in a write-inhibited state inserted in the drive recorder. It has a control part which controls so that a recorder may be operated. According to the drive recorder of the present invention, if the recording element is inserted into the drive recorder in a write-protected state, it is possible to reproduce the video information and the like. The video information recorded on the recording element by the procedure can be played back. Therefore, even when a vehicle equipped with a drive recorder is in an accident, the video information recorded on the recording element can be confirmed on the spot.
  • the drive recorder records a plurality of video information received from the imaging unit on a recording element, a recording mode for recording the video information on the recording element, and video information recorded on the recording element.
  • the control unit is configured to control the drive recorder to operate in any one of the playback modes for playing back, and the operation switch for controlling the playback operation in the playback mode.
  • the drive recorder of the present invention if the recording element is inserted into the drive recorder in a write-protected state, it is possible to reproduce video information and the like. Therefore, in a drive recorder with a small number of operation units, it is simple and reliable. The video information recorded on the recording element by the procedure can be played back.
  • FIG. 1 shows an example in which a drive recorder is mounted on a vehicle.
  • Fig. 2 is a diagram showing an example in which a drive recorder or the like is installed in a vehicle.
  • FIG. 3 is a perspective view of the drive recorder body.
  • FIG. 4 is a diagram showing an example of the appearance of the playback device.
  • Fig. 5 is a block diagram showing the electrical configuration of the drive recorder.
  • Fig. 6 is a block diagram showing the electrical configuration of the power supply control circuit.
  • FIG. 7 is a block diagram showing the electrical configuration of the playback device.
  • FIG. 8 is a diagram showing an example of the processing flow of the drive recorder.
  • FIG. 9 is a diagram showing a self-diagnosis processing flow of the acceleration sensor.
  • Fig. 10 (a) shows the case where the drive recorder 2 is set up and placed on the vehicle 1
  • Fig. 10 (b) shows the case where the vehicle 1 is placed with the drive recorder 2 next to it
  • Fig. 10 ( c) is a diagram showing a state in which the drive recorder 2 is further tilted by an angle ⁇ from the state of FIG. 10 (b).
  • FIG. 11 is a diagram showing a G value detection processing flow.
  • FIG. 12 is a diagram showing a flow for confirming the output of the acceleration sensor 5.
  • FIG. 13 is a diagram showing a processing flow of G detection.
  • FIG. 14 (a) is a graph showing an example (1) of G value 50 determined by the processing flow of Fig. 11.
  • Fig. 14 (b) is a cyclic representation of the second RAM 15
  • FIG. 6 is a diagram showing video information recorded on the memory card and video information recorded on the memory card 6.
  • Fig. 15 (a) is a diagram showing an example graph (2) of the G value 60 determined by the processing flow of Fig. 11.
  • Fig. 15 (b) is cyclically shown in the second RAM 15.
  • FIG. 3 is a diagram showing recorded video information and video information recorded on a memory card 6.
  • Fig. 16 () is a diagram showing an example graph (3) of G value 70 obtained by the processing flow of Fig. 11.
  • Fig. 16 (b) is cyclically recorded in the second RAM 15. Recorded video information and memory card 6 It is a figure by which the image information performed is shown.
  • Fig. 17 (a) is a diagram showing an example graph (4) of G value 80 obtained by the processing flow of Fig. 11.
  • Fig. 17 (b) is cyclically connected to the second RAM 15.
  • FIG. 5 is a diagram showing recorded video information and video information recorded on the memory card 6.
  • FIG. 18 is a diagram showing a voltage reduction process flow (1).
  • FIG. 19 is a diagram showing a voltage reduction process flow (2).
  • FIG. 20 is a diagram showing a voltage drop state.
  • Figure 21 shows the mode switching flow.
  • FIG. 22 shows the playback order
  • Fig. 23 is a diagram showing the flow of the operation example of the memory card.
  • Fig. 24 is a diagram showing a correspondence table of visual field ranges.
  • FIG. 25 is a diagram showing an example of a screen for displaying video information.
  • Fig. 26 shows the operation status classification process flow.
  • Fig. 27 is a diagram showing sample rows and the like.
  • Figure 28 shows an example of a peak master file.
  • FIG. 29 shows an example of the edit screen.
  • FIG. 30 (a) is a diagram showing a G 2 value sample sequence 30 0 0, Fig. 3 0 (b) is a diagram showing a G 1 value sample sequence 3 0 1, and Fig 3 0 (c)
  • FIG. 4 is a diagram showing a sample train 3 0 2 of vehicle speed.
  • FIG. 3 1 (a) is a diagram showing the G 2 value sample sequence 3 1 0, and Fig. 3 1 (b) is a diagram showing the G 1 value sample sequence 3 1 1 and Fig. 3 1 (c)
  • FIG. 4 is a diagram showing a sample train 3 1 2 for vehicle speed.
  • FIG. 3 2 (a) is a diagram showing the G 2 value sample string 3 2 0, and Fig. 3 2 (b) is a diagram showing the G 1 value sample string 3 2 1, and Fig. 3 2 (c)
  • FIG. 4 is a diagram showing a sample sequence 3 2 2 of vehicle speed.
  • Fig. 3 3 (a) is a diagram showing a sample sequence 3 3 0 of G 2 values.
  • 3 (b) is a diagram showing a G 1 value sample sequence 3 3 1
  • FIG. 3 3 (c) is a diagram showing a vehicle speed sample sequence 3 3 2.
  • Fig. 3 4 (a) is a diagram showing a sample string 3 4 0 of G 2 values.
  • FIG. 4 (b) is a diagram showing a G 1 value sample sequence 3 4 1
  • FIG. 3 4 (c) is a diagram showing a vehicle speed sample sequence 3 4 2.
  • FIG. 1 is a diagram showing an example in which a drive recorder 2 is mounted on a vehicle 1.
  • a drive recorder 2 is installed in the vehicle 1 and is connected to a first camera 3 that captures the front of the vehicle 1 and a second camera 4 that captures the rear of the vehicle 1.
  • Video information from the first camera 3 or the like is cyclically stored in the semiconductor storage unit 15 in the drive recorder 2.
  • a predetermined recording condition refers to a case where an impact is applied to the vehicle 1 due to an accident or the like, and details will be described later.
  • the drive recorder 2 acquires operation information including vehicle speed information and the like, and cyclically stores it in the semiconductor storage unit 15 in the drive recorder 2. If the above-mentioned recording conditions are established, the operation information is associated with the video information and stored together with the video information. Recorded on card 6. Details of the operation information will be described later.
  • FIG. 2 is a diagram showing an example in which the drive recorder 2 is installed in the vehicle 1.
  • the drive recorder 2 is fixed to the end of the center panel at the lower left of the handle, and the first camera 3 (and the second camera 4 not shown in FIG. 2), the GPS sensor 9, and the vehicle speed sensor 1 (not shown). 0, battery not shown (21), in-vehicle display (30) etc. are electrically connected.
  • the first camera 3 is attached to the windshield on the back side of the vehicle interior mirror, takes a picture of the front of the vehicle, and sends the video information to the drive recorder 2.
  • FIG. 3 is a perspective view of the main body of the drive recorder 2
  • the drive recorder 2 includes a microphone 7,. Switch 8, a power switch 20, a LED 25, a buzzer 26, and an open / close sensor (not shown).
  • the microphone 7 picks up the sound in the vehicle 1
  • the shadow switch 8 is used for various inputs for determining the evening time to record the video information in the drive recorder 2, initialization of the drive recorder 2, etc.
  • the D 2 5 and the buzzer 26 have a function of notifying the user of the status of the drive driver 3 2 by generating a light emission or a warning sound.
  • the opening / closing sob 3 1 is slid and positioned on the upper part so as to protect the memory card 6 (see FIG. 3 situation).
  • the drive recorder 2 also has an open / close sensor 2 7 that is linked to the open / close knob 3 1.
  • the open / close knob 3 1 is slid on the top of the memory card 6 (the state shown in FIG. 3).
  • OFF signal indicating status It is configured to output a signal “N” to indicate the open state while the memory card 6 can be removed.
  • FIG. 4 is a diagram showing an example of the appearance of the playback device.
  • Video information, operation information, and the like recorded on the memory card 6 are reproduced by a reproduction device 40 composed of a personal computer or the like.
  • the memory card 6 is inserted into an I / F connected to a personal computer, and video information and operation information are read.
  • the user can investigate the running state of the vehicle or the cause of the accident by verifying the reproduced video information and operation information.
  • FIG. 5 is a block diagram showing an electrical configuration of the drive recorder 2.
  • the first camera 3 is controlled so as to photograph the front of the vehicle 1 and output the analog video signal as the first video information 500, for example, as a two-dimensional image sensor, a CCD image sensor (Charge Coupled Device). Image Sensor) and CM ⁇ S 'Image Sensor (Complementary Metal Oxide Semiconductor Image Sensor) force.
  • a CCD image sensor Charge Coupled Device
  • CM ⁇ S 'Image Sensor Complementary Metal Oxide Semiconductor Image Sensor
  • the second camera 4 is installed in the vehicle 1 as the second camera, shoots a different direction from the power mela 3 such as the rear of the vehicle or the vehicle interior, and outputs an analog video signal as the second video information 5 0 1 To be controlled. If only one camera is required, the second camera 4 need not be connected to the drive recorder 2.
  • the acceleration sensor 5 is a so-called G sensor (Gravity Accelerative Sensor) that detects the magnitude of an impact applied to the vehicle 1 as gravitational acceleration. It consists of a semiconductor that generates an electric current based on the gravitational acceleration when it receives an impact, detects the magnitude of the gravitational acceleration in the longitudinal and lateral directions of the vehicle, and outputs gravitational acceleration information 50 2 to the CPU 24. .
  • the memory card 6 is a recording medium that can be removed from the drive recorder 2, and is composed of an SD card (Secure Digital Memory Card) that is a programmable nonvolatile semiconductor memory card. The memory card 6 stores video information and operation information.
  • the memory card 6 separately records various information such as recording conditions to be described later, the unique ID of the memory card 6, the ID of the user (for example, taxi crew, etc.) or the name data of the user who uses the memory card 6.
  • the memory card 6 is provided with a dip switch so that the memory card 6 can be in a write-protected state by the operation of the dip switch.
  • an SD card is used as a removable storage medium.
  • the present invention is not necessarily limited to this, and other removable memory cards (for example, a CF card (Compac t Flash Card) or memory stick), hard disk, etc. can also be used.
  • the drive recorder 2 with a built-in hard disk instead of the memory card 6.
  • the drive recorder 2 is provided with a transmission circuit and recorded on the hard disk by wireless communication. Information and operation information may be configured to be transmitted to the playback device 400.
  • the microphone 7 is electrically connected to the C P U 2 4, and is configured to collect the sound inside or outside the vehicle 1 and transmit it to the C P U 2 4 as audio information 5 0 3. Audio information 50 3 is converted into a digital signal by an analog / digital converter in C P U 2 4. Note that it is preferable to use a unidirectional microphone with high sensitivity in front of the microphone so as not to unnecessarily collect noise on the road.
  • the shooting switch (shooting SW) 8 transmits a signal to the electrically connected CPU 24 when operated by the user.
  • This The CPU 24 controls the video information and operation information stored in the second RAM 15 to be recorded in the memory card 6. That is, the operation of the shooting SW 8 acts as the establishment of the recording condition. Note that only the video information at the moment when the shooting SW 8 is operated may be recorded in the memory card 6.
  • the photographing SW 8 is also used as an operation means for using other functions of the drive recorder 2 as will be described later.
  • the GPS (Global Positioning System) receiver 9 receives radio signals including satellite orbits from multiple GPS satellites and time data from atomic clocks mounted on the satellites.
  • the current location information is obtained by calculating the relative distance difference between each satellite based on the time difference. By capturing the radio waves from three satellites, the position on the earth's plane can be determined.
  • the GPS receiver 9 detects such current location information, it transmits GPS information 50 4 including position information and time information to the C P U 24.
  • the vehicle speed sensor 10 outputs a low-speed rotation provided on the wheel shaft of the vehicle 1 as a rotation pulse signal 5 05, and is configured by a magnetic sensor or an optical sensor. Note that C P U 24 calculates the speed information of the vehicle 1 by calculating the number of wheel revolutions per unit time from the pulse signal received from the vehicle speed sensor 10.
  • the interface (I ZF) 1 1 also constitutes a so-called slot portion of the memory card 6 provided in the drive recorder 2.
  • the IZF 11 transfers the recorded information 5 0 6 including the video information and operation information transmitted from the drive recorder 2 to the inserted memory card 6 and stores the information 5 0 stored in advance in the drive recorder 2. Transfer 7 to CPU 24.
  • the video switch (hereinafter referred to as ⁇ video SWJ) 1 2 is a switch for switching a camera to be photographed when a plurality of cameras are provided.
  • the first camera 3 and the second camera 4 are connected.
  • One camera is selected by a selection signal 5 0 8 from the CPU 24.
  • Video information from the selected camera is output to the image processing circuit 13 as selected video information 5 09.
  • the video SW 1 2 may have a timekeeping function so that the video SW 1 2 is switched at regular time intervals.
  • the image processing circuit 13 converts the selected video information 5 0 9 input from the first camera 3 and the second camera 4 via the video SW 1 2 into a digital signal, and creates an image data 5 1 0. Output.
  • the first RAM 14 temporarily stores the image data 5 10 converted by the image processing circuit 1 3.
  • the first RAM 14 is connected to the DMA (Direct Memory Access) circuit in the CPU 24, and one of the input images is three out of three, that is, 10 files per second are generated by the DMA function. It is transferred to the second RAM 15 and stored cyclically.
  • the second RAM (semiconductor memory unit) 15 cyclically stores the video information converted into the image data by the image processing circuit 13 and the operation information.
  • the first RAM 14 and the second RAM 15 For example, SD RAM (Synchronous Dynamic Random Access Memory) is used.
  • SD RAM is designed to operate in synchronization with the CPU clock, the I / O latency is short, and access can be performed faster than conventional DRAM (Dynamic Random Access Memory). This is because it is suitable for high-speed processing of large volumes of video data.
  • the non-volatile ROM 16 stores a control program 17 etc. for comprehensively controlling hardware resources constituting the drive recorder 2.
  • Non-volatile ROM 16 can be programmed by using flash memory, EEPROM (Erasable Programmable Read Only Memory), ferroelectric memory, etc. Can be written and erased.
  • the control program 17 is stored in the non-volatile R ⁇ M 16 and is read out to the CPU 24 when the drive recorder 2 starts up.
  • the control program of each part functions as a computer program.
  • the accessory switch (A C C switch) 19 is electrically integrated with a key cylinder for starting the engine provided in the vehicle 1.
  • the accessory on signal 5 1 1 is transmitted to the CPU 2 4 of the drive recorder 2 and the power control circuit 2 2.
  • the drive recorder 2 receives the accession signal 5 1 1 of the AC switch 19, power is supplied from the power control circuit 2 2 and control is started.
  • an ignition key output signal (IG on signal) instead of the output signal of the AC switch 19.
  • the power switch (power switch) 20 transmits a power-on signal to the CPU 24 and the power control circuit 22 of the drive recorder 2 when the user performs a switch operation. This can be used when you want to operate the drive recorder 2 without turning on the ACC switch 1 7.
  • the battery 2 1 is provided in the vehicle 1 and supplies power to the main body of the drive recorder 2. The battery supplies power to the power control circuit 22. Note 2 1 can be installed in the vehicle and 1 2 V Any device that can generate force may be used.
  • the power control circuit 22 supplies the power from the notch 21 to each part of the CPU 2 4 and the drive recorder 2. Details of the power supply control circuit 22 will be described later.
  • a CPU (Central Processing Unit) 24 operates as a control device of the drive recorder 2 and is configured by a microcomputer or the like. Based on the control program 1 7, the CPU 2 4 executes control of each part of the drive recorder 2 and data calculation processing.
  • the LED 25 lights up while the drive recorder 2 is activated by supplying power from the C PU 24, and notifies the user that the drive is being activated. Further, when an abnormality occurs in the drive recorder 2, etc., a predetermined blinking is performed by the CPU 24 to notify the user of the occurrence of the abnormality.
  • the buzzer 26 is configured to generate a predetermined warning sound by the C P U 24 and notify the user of the occurrence of an abnormality when an abnormality occurs in the drive recorder 2 or the like.
  • the open / close sensor 27 is configured to output an open signal and a close signal in accordance with the movement of the open / close knob 3 1 when the memory card 6 is inserted or removed.
  • RTC (Real Time Clock) 2 8 generates a signal corresponding to the current time and transmits it to C P U 2 4.
  • the display unit 30 is composed of a liquid crystal display or the like, and reproduces video information recorded on the memory card 6 in a predetermined situation described later.
  • FIG. 2 shows the case where the display of the navigation device mounted on the vehicle is used as the display unit 30, a separate display may be used as the display unit 30.
  • the drive recorder 2 preferably has an output port for outputting video information.
  • the drive recorder 2 is housed in the same casing as the first camera 3, the second camera 4, the GPS receiver 9, and / or the display unit 30 as a device dedicated to video recording, and is configured integrally. May be.
  • the drive recorder 2 can also be configured as a function of an in-vehicle navigation device.
  • FIG. 6 is a block diagram showing an electrical configuration of the power supply control circuit 22.
  • the power supply control circuit 22 includes a first power supply circuit 40, a second power supply circuit 41,
  • the first power supply circuit 40 starts operating when the AC switch 19 or the power switch 20 is turned on, and the 1
  • the output from the first power supply circuit 40 is supplied to the first camera 3, the second camera 4, and the like.
  • the second power supply circuit 41 functions as a constant voltage power supply that receives power from the 6.0 V rated first power supply circuit 40 and outputs 3.3 V.
  • the output from the second power supply circuit 4 1 is an image processing circuit 1 3.
  • the third power supply circuit 4 2 functions as a constant voltage power supply that receives power from the 3.3 V rated second power supply circuit 41 and outputs 1.8 V.
  • the output from the third power supply circuit 41 is supplied to CPU 24, etc.
  • the first detector 4 3 detects the output voltage of the battery 21 and
  • the first reduced voltage signal S 1 is output to CPU 24.
  • the second detector 4 4 has the first W 200 Detects the output voltage of power circuit 40 and outputs the second reduced voltage signal S 2 to CPU 24 when the output voltage from first power circuit 40 decreases to 3.7 V or less.
  • the third detection unit 45 detects the output voltage of the second power supply circuit 41, and outputs the reset signal S3 when the output voltage of the second power supply circuit 41 drops to 3.0 V or less. Output to the JPEG circuit, GPS receiver 9, and CPU 24 4 that make up the image processing circuit 1 3, and reset each element to prevent malfunction due to low voltage.
  • the knock-up battery 46 is composed of two capacitors, and even if the output voltage of the battery 21 drops, the JPEG circuit, GPS receiver 9 and Power is supplied so that CPU 24 can be driven. If an impact is applied to the vehicle due to a collision or the like, the battery 2 1 may be damaged, and the battery 2 1 and power control circuit 2 2 may be disconnected from the connection line. Is supplied to the CPU 24, etc., so that the video information being processed can be preserved as much as possible. The voltage reduction process will be described later.
  • FIG. 7 is a block diagram showing an electrical configuration of the playback apparatus 400.
  • the interface (I / F) 4 1 1 constitutes a so-called slot portion, which is a slot for the memo U card 6 provided in the playback device 400.
  • the RAM 4 1 4 is used for temporarily storing data when the CPU 4 2 4 performs image processing of video information transferred from the memory card 6 and information processing of operation information.
  • R A M 4 1 4 includes, for example, S
  • the non-volatile ROM 4 1 6 is a hard drive that constitutes the playback device 4 0 0. Stores control program 4 1 7 etc. for overall control of key resources.
  • EEPR ⁇ M electrically erasable programmable read-only memory
  • ferroelectric memory ferroelectric memory
  • the control program 4 1 7 is stored in the non-volatile R O M 4 1 6 and is read out to the CPU 4 2 4 when the playback device 400 starts up, and functions as a program for the control processing of each part. .
  • the CPU 4 2 4 operates as a control device of the playback device 400, and is configured by a micro computer or the like. ⁇ L -0
  • the CPU 4 2 4 is based on the control program 4 1 7 and the playback device 4 0 0 Executes control of each part and data calculation processing.
  • the operation unit 4 3 0 is composed of a keypad, a mouse and the like, and is used as a means for performing operation input to the CPU 4 2 4 when the user operates the playback device 400.
  • the display unit 44 0 is composed of a liquid crystal display device or the like, and is used to display video information, operation information, and the like BD feKed on the memory card 6 as appropriate.
  • the map information recording unit 45 50 is composed of a recording medium such as an eight disk or a DV, and records map information including road information and speed limit information.
  • the force information recording unit 4600 is constituted by a recording medium such as a hard disk, and is used for recording video information, operation information, and the like recorded in the memory card 6.
  • FIG. 8 is a diagram showing an overall processing flow of the drive recorder 2.
  • the processing flow shown in FIG. 8 is mainly executed by the CPU 2 4 of the drive recorder 2 in cooperation with each component of the drive recorder 2 according to the control program 17.
  • the start-up process includes an initialization process by the boot program and a self-diagnosis process for various elements related to the drive recorder 2. The self-diagnosis process will be described later.
  • the CPU 24 stores the video information in the second RAM 15 in a cyclic manner (S 2). Specifically, the CPU 2 4 alternates still image data (640 0 X 48 0 pixels) captured by the first camera 3 and the second camera 4 at a rate of 10 frames per second. Acquire (ie, still images from camera 3 every 0.2 seconds, still images from camera 4 every 0.2 seconds, etc.) and second RAM via first RAM 14 1 Record cyclically in 5. Further, every time the still image data from the first camera 3 and the second camera 4 is acquired, the CPU 24 acquires operation information and records it in the second RAM 15 in association with the still image data. . Note that the above-described time interval and number of still images acquired by C P U 24 are merely examples, and the present invention is not limited to this.
  • the CPU 24 determines whether or not a recording condition described later is satisfied (S 3).
  • the case where the recording condition is satisfied means the following three cases. However, one or two of them may be used, and other conditions other than the three may be set.
  • G detection Acceleration sensor 5 force, gravity acceleration of 0.40 G or more is detected. The reason why the recording condition is satisfied is that when such a gravitational acceleration is applied to the vehicle 1, it can be recognized that an accident has occurred or that the accident has been imminent. Note that the above set value (0.40 G) is an example, and other positions can be adopted. Details will be described later.
  • Speed trigger When the speed difference of the vehicle 1 detected from the vehicle speed sensor 10 within a predetermined period of time exceeds the threshold. Specifically, it is judged that the recording condition is satisfied when the deceleration for 1 second becomes 14 kmZh or more while traveling at 60 kmzh or more.
  • the reason why the recording condition is satisfied is that when the vehicle 1 undergoes such a speed change, it can be recognized that an accident has occurred or that the accident has been imminent.
  • the above set value deceleration for 1 second while traveling at 60 kmZh or more, 14 kmzh or more
  • other values can be used.
  • the CPU 24 will record video information for a total of 20 seconds for 12 seconds before the recording condition is established and 8 seconds after the recording condition is established (every time the recording condition is satisfied, 20 0 0 (Still images) and operation information are transferred from the second RAM 15 to the memory card 6 and recorded (S 4). If the recording condition is satisfied, the event record indicating the satisfied recording condition (denoting any one of the above three) is recorded on the memory card 6 together.
  • the memory card 6 has a capacity capable of recording video information for at least 15 events.
  • the operation information is the following information.
  • Vehicle speed sensor 10 Speed information detected from 0.
  • the contents of the operation information are not necessarily limited to the above information, and include information on the operation and traveling of the vehicle 1 such as the lighting state of lights such as the turn signal and the steering angle of the steering wheel. It's okay.
  • the CPU 24 determines whether or not an end signal has been received by the OFF signal of the ACC switch 19 or the FF signal of the power switch 20 (S5). Then, end processing is performed (S6), and a series of processing ends. If the end signal has not been received, S2 to S4 are executed repeatedly.
  • the self-diagnosis process of the drive recorder 2 is performed in the start-up process (S 1) in the process flow shown in Fig. 8, and the target is the JPEG_IC, RTC that configures the acceleration sensor 5 and image processing circuit 13 2 8, and the connection state of the first camera 3 and the second camera 4.
  • the reason for performing the self-diagnosis of the drive recorder 2 is that the data recorded by the drive recorder 2 may be used as evidence for verifying accidents. Therefore, if there is a problem with the drive recorder 2 and data cannot be recorded properly, or if there is no problem in the recorded data in advance, it will be confirmed in advance.
  • FIG. 9 is a diagram showing a flow of self-diagnosis processing of the acceleration sensor 5.
  • the CPU 2 4 outputs the output G 1 of the first axis parallel to the front-rear direction of the vehicle 1 among the three axes (X axis, y axis and z axis) of the acceleration sensor 5 and The output of the output G 2 of the second axis parallel to the set left and right direction of the vehicle 1 is acquired (S 1 1).
  • FIG. 10 is a diagram showing the positional relationship between the drive recorder 2 and the acceleration sensor 5.
  • Fig. 10 (a) shows the case where the drive recorder 2 is set up and placed on the vehicle 1 (see Fig. 2)
  • Fig. 10 (b) shows the case where the vehicle 1 is placed next to the drive recorder 2.
  • FIG. 10 (c) is a diagram showing a state in which the drive recorder 2 is further inclined by an angle S from the state of FIG. 10 (b). Further, in FIGS. 10 (a) to 10 (c), the direction of the arrow B indicates the traveling direction of the vehicle.
  • the acceleration sensor 5 is a force having three axes ⁇
  • the X-axis output is set to the first-axis output G1
  • the y-axis output is set to G 2 of the second axis, and the z-axis output is not used.
  • the drive recorder 2 is placed as shown in Fig. 10 (b)
  • the z-axis output is set to the first axis output G1
  • the X-axis output is set to the second axis output G2.
  • Set and do not use y-axis output since the drive recorder 2 uses the acceleration sensor 5 having three-axis output, the arrangement direction of the drive recorder 2 can be freely selected. However, in order to do so, it is necessary to set in advance which output is used as the output of the first and second axes. Therefore, when installing Drive Recorder 2 in the vehicle, set which of X, Y, and ⁇ axis to use.
  • CPU 24 outputs either 1st axis output G 1 or 2nd axis output G 2 obtained in S 1 1 for a value of 1 G or more for 5 seconds or more. It is determined whether or not (S 1 2). If it ’s normal, Since both should output 0 G, detecting an acceleration of 1 G or more for 5 seconds or more can determine that some abnormality has occurred in the elements of the acceleration sensor.
  • CPU 2 4 switches the test mode terminal (ST terminal) of acceleration sensor 5 (step S 1) if it does not output a value of 1 G or more for 5 seconds or more in step 1 2. 3) Generate a situation in which electrical vibration has occurred, detect the output, and determine whether or not a change has occurred in the output (S14). If the output of acceleration sensor 5 does not change even after switching the ST terminal, it can be determined that there is a high possibility that the sensor will not operate normally.
  • the CPU 2 4 outputs either the first axis output G 1 or the second axis output G 2 obtained at S 11. However, it is determined whether or not a value of 0.7 G or more is output for 5 seconds or more (S 15). In such a case, the acceleration sensor 5 itself may operate normally, but the axes set as the first and second axes do not match the initial settings. Possibility, that is, the drive recorder 2 that should have been arranged as shown in Fig. 10 (a) is moved from the middle as shown in Fig. 10 (b), and the output shaft is set. It can be judged that there is a high possibility that the situation is not known. For example, when moving from Fig. 10 (a) to Fig. 10 (b), the Y-axis set as the second axis is changed in the vertical direction, so that an output of 0.7 G or more is generated by gravity. Will occur.
  • the CPU 24 judges that it is normal and outputs the first axis output G 1 and the second axis output G. Processing is performed so that the offset setting of 2, that is, the value acquired in S 11 is set to 0 (S 16), and the series of processing ends.
  • the cause of the offset error is that drive recorder 2 is The case where it is not attached completely parallel to the case is conceivable. For example, it may be attached as shown in Fig. 10 '(b), but it may be attached at an angle as shown in Fig. 10 (c). This drive recorder 2 is configured so that it can operate properly by setting the offset angle to about 30 degrees as shown in Fig. 10 (c).
  • the CPU 2 4 determines that the setting has not been set after changing the mounting direction of the drive recorder 2, and turns on the LED 25 and generates a warning sound from the buzzer 26 to notify the user of the abnormality. This continues until the switch 1 9 is turned OFF or the power switch 2 0 is turned OFF (S 17). However, since the acceleration sensor 5 itself operates normally, the operation of the drive recorder 2 is continued. ⁇
  • the interrupt signal input to the CPU 2 4 is constantly monitored every 1 6.7 ms. If no interrupt occurs once in 500 ms, the CPU 24 determines that an abnormality has occurred in the JPEG-IC that constitutes the image processing circuit 13. If it is determined that an abnormality has occurred, the CPU 24 turns on the LED 25 and generates a warning sound from the buzzer 26 to notify the user of the abnormality and perform operations other than the LED 25 and buzzer 26. The above operation is continued until the ACC switch 19 is turned off or the power switch 20 is turned off. Note that the interrupt interval of 16.7 ms and the monitoring period of 500 ms are examples, and are not limited to these.
  • CPU 24 monitors status bits indicating year, month, date / time, second, etc. received from RTC 28, and if data outside the specified range is received, an error occurs. Is determined to have occurred. If it is determined that an abnormality has occurred, the CPU 24 emits a warning sound from the lighting of the LED 25 and the buzzer 26, notifies the user of the abnormality, and sets the internal RTC of the CPU 24 Set to the value of (for example, 2 0 0 January 1, 10:00, 0 minutes, 0 seconds). The operation of the other drive recorder 2 is continued.
  • the CPU 24 transfers the size of one image transferred from the first RAM 14 to the second RAM 15 for 10 seconds or longer. If it is 6 5 9 2 bytes, it is determined that an abnormality has occurred (the connection between the drive recorder 2 and the first camera 3 and the second camera 4 has been disconnected). 6 5 9 2 bytes corresponds to the size when the image data created by JPEG_IC used in this drive recorder is completely black. In this case, the JPEG-IC is preset to output a black image when there is no video input from the cameras 3 and 4.
  • the drive recording Therefore, if a complete black image is output continuously for a predetermined period (eg, 10 seconds), the drive recording Therefore, it can be determined that the connection between the first camera 3 and the second camera 4 is disconnected.
  • the CPU 2 4 lights up the LED 2 5 and generates a warning sound from the buzzer 2 6 to notify the user of the abnormality, stops the operations other than the LED 2 5 and the buzzer 2 6, and turns off the ACC switch 1 9 The above operation continues until the power switch 2 0 turns off.
  • the size of the 6 5 9 2-byte image data to be detected and the monitoring period of 10 seconds are examples, and the present invention is not limited to this. If the JPEG-IC is configured to output a color other than black (for example, blue) when there is no video input, an abnormality may be detected with the blue image data size.
  • the self-diagnosis process of the connection state of the first camera 3 and the second camera 4 may be determined not only when the drive recorder 2 is started but also when the drive recorder 2 is operating.
  • the drive recorder 2 since the drive recorder 2 according to the present invention performs a self-diagnosis at the time of start-up or the like and confirms normal operation, it is possible to ensure the reliability of the recorded video information and operation information. .
  • Figure 11 shows the G value detection process flow.
  • C P U 2 4 determines the G value based on the output of acceleration sensor 5 according to the processing flow shown in FIG.
  • the CPU 24 is determined according to the processing flow shown in Fig. 11. Based on the G value, the CPU 24 determines whether or not the recording condition relating to the G detection described above is satisfied. It becomes.
  • C PU 24 acquires the first axis output G 1 and the second axis output G 2 of the acceleration sensor 5 set in advance (S 20, S 21).
  • C P U 24 detects the current speed of the vehicle 1 based on the vehicle speed pulse from the vehicle speed sensor 10 (S 2 2).
  • the CPU 2 4 receives the current position information of the vehicle 1 from the GPS receiver 9. Based on the information, it is determined whether or not the road on which the vehicle 1 is currently traveling corresponds to a sharp curve (S 2 3).
  • the CPU 2 4 may obtain information on whether or not the vehicle is a sharp curve from a navigation system (not shown) connected to the drive recorder 2, and a storage unit for storing map information in the drive recorder 2 itself ( It is possible to obtain information on whether or not the vehicle is a sharp curve by comparing the map information with the current position information.
  • the absolute value of the first axis output G 1 and the second axis output G 2 obtained in S 2 0 and S 2 1 ( G 1 2 + G 2 2) 0 - 5 to a G value (S 2 4).
  • a correction value based on the vehicle speed acquired in S 2 2 is acquired, and the correction value ⁇ is acquired with S 2 0 and S 2 1.
  • the correction value can be determined to be 0.1 when the vehicle speed is less than 60 km / h and 0.2 when the vehicle speed is 60 km / h or more.
  • the correction value ⁇ is subtracted from the absolute value of G 2, which is the left and right output of both cars 1.
  • G 2 is the left and right output of both cars 1.
  • the sharp curve is likely to cause acceleration in the left and right direction and an accident etc. However, there is a possibility that the recording condition may be satisfied by mistake.
  • positive is set as acceleration in the right direction
  • negative is set as acceleration in the left direction.
  • the G value is (G 1 2 + (1 G 2 I without determining whether the road on which the vehicle 1 is traveling is a sharp curve).
  • - a) 2) 0 - may be determined based on the 5.
  • the correction value a should be determined regardless of the vehicle speed. May be.
  • the sharp curve may be determined by other means such as a steering angle sensor.
  • FIG. 12 is a diagram showing a flow for confirming the output of the acceleration sensor 5.
  • Figure 12 shows the processing flow for that purpose.
  • C P U.24 determines whether or not the vehicle 1 has stopped (S 30). Whether or not it is stopped can be assumed, for example, when the G value obtained by the processing flow in Fig. 11 is 3 G or more and 0.1 G or less. Alternatively, it may be determined by the vehicle speed sensor that the vehicle has stopped when the continuous speed is equal to or lower than a predetermined speed (for example, 2 km / h).
  • a predetermined speed for example, 2 km / h.
  • CPU 2 4 obtains output G 1 set as the first axis and output G 2 set as the second axis among the outputs from acceleration sensor 5 immediately after stopping (S 3 1)
  • the axis whose output when the vehicle starts moving again after vehicle 1 stops is 0.2 G or more is recognized as the axis parallel to the traveling direction (or front-rear direction) of vehicle 1 (S 3 2).
  • C P U 24 stores, as history information, the axis recognized as the axis parallel to the traveling direction of the vehicle 1 in the second R A M 15 in this determination (S 3 3).
  • the CPU 2 4 recognizes the output of the axis other than the axis certified in S 3 2 as the second axis, that is, the output in the left-right direction of the vehicle 1 (S 3 4). Terminate the process.
  • the process shown in FIG. 12 is repeated every time it is determined that the vehicle 1 has stopped. Since the history information is collected when the processing flow shown in FIG. 12 is executed a predetermined number of times, the axis may be recognized based on the history information. After the CPU 2 4 clearly identifies the left and right axis output of the vehicle 1 by re-setting the axial direction as shown in Fig. 12, it prevents false detection during curve driving as shown in Fig. 11 Therefore, it can be corrected so as to subtract a predetermined correction value from the absolute value of the output G 2 of the second axis (the left-right direction of the vehicle) of the acceleration sensor 5. Such composite processing can further prevent erroneous detection during curve driving.
  • the axis may be set at the start, not at the stop.
  • the axis that becomes 0.2 G or more immediately after it is determined to start may be determined as the axis parallel to the traveling direction of vehicle 1.
  • the history information may be reset when the drive recorder 2 is turned on, and information may be repeatedly collected every time the power is turned on.
  • Fig. 13 is a diagram showing the processing flow of G detection, which is one criterion for establishing the recording condition.
  • the CPU 2 4 detects that the G value detected by the processing flow in Fig. 1 1 takes a value less than or equal to the first threshold (0.1 G), then the second threshold (0.4 G). It is determined whether or not the above values are taken (S 40), and in such a case, it is determined that the G detection recording condition is satisfied (S 4 1).
  • the first threshold (0.1 G) and the second threshold (0.4 G) are values set in advance for G detection. Also, only when a value equal to or greater than the second threshold is taken after falling below the first threshold is determined as the recording condition being satisfied, a value equal to or greater than the second threshold is detected continuously. This is because there is often no need to record video information etc. due to newly established recording conditions, such as an abnormality in the acceleration sensor 5 or a state in which the vehicle 1 rolls over. .
  • the CPU 24 determines whether or not the normal video information recording (12 seconds before the recording condition is satisfied and 8 seconds after the recording condition is satisfied) is extended (S 4 2). .
  • the recording condition is set to a predetermined time (for example, 4 Extend for a second (S 4 5). If the recording condition is satisfied again during recording of video information, and if the recording condition is further satisfied in the latter half of 8 seconds after the previous recording condition is satisfied, less video information is recorded thereafter. Therefore, the recording of video information etc. will be extended. As a result, a single recording in the case of S 4 5 is a total of 24 seconds, 12 seconds before and 12 seconds before the recording condition is satisfied.
  • Figure 14 shows an example of video information recording (1) by G detection.
  • Fig. 14 (a) shows a Draft with a G value of 50 determined by the processing flow of Fig. 11.
  • Fig. 14 (b) shows an image recorded in the second RAM 15 in a circular manner.
  • FIG. 7 is a diagram showing information and video information recorded in memory capacity 6.
  • the G value that is equal to or greater than the second threshold value is detected for the first time after falling below the first threshold value, and then falls below the first threshold value again.
  • G value above the threshold was detected Shall.
  • 1: 0 to 1: 1 is T 2 seconds or more.
  • video information for 2 seconds before t 0 and 8 seconds after t 0 according to the establishment of recording conditions at t 0 5 2 S, recorded as one event 5 3 on memory card 6 .
  • tl is T 2 seconds or more after the previous t 0 and is not extended when t 1 occurs. Therefore, according to S 4 6 in Fig. 13, the recording condition at t 1 is satisfied. Therefore, video information 5 4 for 12 seconds before t 1 and 8 seconds after t 1 is recorded as another event 5 5 in the memory card 6.
  • Event 5 3 and event 5 5 include overlapping video information as shown in FIG. 14 (b).
  • Fig. 15 is a diagram showing a recording example (2) of video information by G detection.
  • Fig. 15 (a) is a diagram showing an example graph (2) of G value 60 obtained by the processing flow of Fig. 11.
  • Fig. 15 (b) is a cyclic representation of the second R AM 15
  • FIG. 6 is a diagram showing video information recorded on the memory card and video information recorded on the memory card 6.
  • the G value that is equal to or greater than the second threshold value is detected for the first time after falling below the first threshold value, and then falls below the first threshold value again.
  • a G value equal to or greater than the second threshold value is detected at t2 after a G value equal to or greater than the threshold value is detected and then falls below the first threshold value again.
  • t 0 to t 1 is less than T 2 seconds
  • t 0 to t 2 is T 3 seconds or more.
  • Video information 6 3 is recorded as an extension 6 5 on the memory card 6. It is. Furthermore, since t 2 is being extended and is from t 0 to T 3 seconds or more, according to S 4 9 in FIG. Image information 6 6 of the second and 8 seconds after is recorded as another event 6 7 in the memory mode 6 Event 6 4 and Event 6 7 are as shown in Fig. 15 (b) Duplicate video information will be included.
  • Fig. 16 shows an example (3) of recording video information by G detection.
  • Fig. 16 (a) shows a graph example (3) of G value 70 obtained by the processing flow of Fig. 11.
  • Fig. 16 (b) shows the second R A M 1
  • FIG. 5 is a diagram showing video information recorded in a circular manner and video information recorded in a memo field 6.
  • a G value greater than or equal to the second threshold is detected, and then after falling below the first threshold again, t1, t2, t3 and It is assumed that a G value greater than the second threshold is detected at t4. Also, t 0 to t 1 is less than T 1 s, t 0 to t 2 is less than T 2 s, t 0 force, and t 3 is T
  • t 0 to t 4 are T 3 seconds or more.
  • Event 7 4 and event 7 7 include overlapping video information as shown in Fig. 16 (b).
  • Figure 17 shows an example of video information recording (4) by G detection.
  • Fig. 17 (a) is a graph showing an example (4) of the G value 80 determined by the processing flow of Fig. 11.
  • Fig. 17 (b) is cyclically shown in the second RAM 15. The recorded video information and the video information recorded on the memory card 6 are shown.
  • the G value above the second threshold value is detected for the first time after falling below the first threshold value, then falls below the first threshold value again, and then the second second time at t 1.
  • a G value above the threshold is detected, but after that, the G value is continuously high.
  • the recording condition is continuously satisfied, or continuously It is controlled so that video information is not recorded unnecessarily, such as when a high G value is detected. It is now possible to use the existing memory card 6 efficiently.
  • the voltage reduction process is a process that is performed to properly protect the video information being recorded when the output voltage from the battery 21 drops due to the vehicle 1 being damaged due to an accident or the like.
  • FIG. 18 is a diagram showing a voltage reduction process flow (1).
  • the C P U 24 always monitors whether or not the first reduced voltage signal S 1 from the first detection unit 4 3 (see FIG. 6) changes from H to L (S 50). As described in FIG. 6, the first detection unit 43 changes the first reduced voltage signal S 1 from H to L when the output voltage of the notch 21 decreases to 8.0 V or less.
  • the CPU 24 schedules the power consumption reduction process that cuts off the power supply to the JPEG-IC and GPS receiver 9 that make up the first camera 3, the second camera 4, and the image processing circuit 13
  • the power for writing to the video information 6 to the memory card 6 is secured (S55).
  • the power for performing the backup process in S 54 is configured to be secured by the knock-up battery 46.
  • the CPU 24 stops the watchdog timer, reboots (S 56), and ends the series of processes.
  • FIG. 19 is a diagram showing a voltage reduction process flow (2).
  • the C P U 24 constantly monitors whether or not the second reduced voltage signal S 2 from the second detector 44 (see FIG. 6) changes from H to L (S 60). As described in FIG. 6, the second detection unit 4 4 detects the second reduced voltage signal when the output voltage of the first power supply circuit 40 (or the output voltage of the backup battery 46) drops below 3-7 V. Change S 2 from H to L
  • FIG. 20 is a diagram showing a voltage drop state.
  • Curve 20 in Fig. 20 shows that the voltage drops from 8.0 V to 3.7 V for T 4 seconds (time from the first voltage drop detection to the second voltage drop detection), from 3.7 V to 3 V . Shows the case of T for 5 seconds (time from the second voltage drop detection to reset signal output) until 0 V.
  • the curve in Fig. 20 shows the voltage drop from 8.0 V to 3.7 V This shows the case where T is 6 seconds until 3.7 V to 3.0 V and T is 7 seconds. Since the reset signal for preventing malfunction of CPU 24 etc.
  • the amount of time is important. As shown in Fig. 20, depending on the time from the first voltage drop detection to the second voltage drop detection, an approximate prediction of the time from the second voltage drop detection to the output of the reset signal is given. be able to.
  • the closing process requires about 500 ms.
  • the time until the voltage drops from 8.0 V to 3.7 V is 1 second or longer, it may take a while until the reset signal is generated. If the time until the voltage drops from 8.0 V to 3.7 V is less than 1 second, the reset signal is likely to occur early. The close process is started immediately after the second undervoltage detection. Note that the above time setting is merely an example, and is not limited thereto.
  • the close process is a process for closing all files that are currently open, and recording of video information to the memory card 6 is thereby terminated. After the close process, writing to the memory card is prohibited. In addition, close processing is appropriate Otherwise, the video information recorded in the file cannot be used properly later, so the close process interrupts the backup process even during the backup process shown in Figure 18 Executed.
  • the CPU 24 stops the watchdog timer after the closing process, performs reboot (S 63), and ends the series of processes.
  • Figure 18 When the voltage reduction process shown in Figure 20 is performed properly, the battery 2 1 is damaged or the connection between the drive recorder 2 and the battery 21 is interrupted due to an accident, etc. However, as much video information as possible can be recorded on the memory card 6 Figure 21 shows the mode switching window.
  • the drive reader / writer 2 has an output port for connection with the display unit 30 so that in the event of an accident, the contents recorded in the memory force 6 can be verified on the spot. It is configured. That is, the drive recorder 2 according to the present invention has a recording mode for recording video information and the like in the memory capacity 6 and a playback mode for reproducing the video information recorded in the memory capacity 6.
  • Figure 21 Using Fig. 1, record mode and playback mode
  • C P U 2 4 detects that the open / close knob 3 1 of the drive recorder 2 is once opened by the open / close sensor 2 7 (S 7
  • the CPU 24 indicates that the drive recorder 2 is operating in the reproduction mode by the LED 25 and / or the buzzer 26 (S74), and ends the series of operations.
  • the CPU 2 4 records from the nonvolatile R0 M.
  • the mode program is downloaded and activated, and accordingly, the drive recorder 2 is operated in the recording mode (S75).
  • the memory card 6 is inserted into the drive recorder 2 in a writable state, set to the recording mode, and the video information and the like are recorded by the establishment of the recording condition as described above.
  • the drive recorder 2 If you want to verify the recorded contents on the spot due to an accident, etc., once you remove the memory force 6 and set the memory card 6 to write-protected, insert it into the drive recorder 2 again. It is possible to change to a playback mode in which video information recorded on the memory card 6 can be played back. If the drive recorder 2 and the display unit 30 are not connected, or if the display unit 30 is damaged, connect a portable display device to the output slot of the drive recorder 2. Just do it.
  • the method for setting the playback mode is not limited to this.
  • various operations such as switching to the playback mode if the shooting switch 8 is operated for a predetermined time within a predetermined time after turning on the power, and switching to the recording mode if the predetermined operation is not performed.
  • the law can be considered.
  • the shooting switch 8 If the shooting switch 8 is pressed again during playback of the event video information, playback stops. If the shooting switch 8 is pressed again while playback is stopped, playback resumes from 1 second before the point where the playback stopped. In addition, after playback of video information related to one event is completed, that state is maintained, and when shooting switch 8 is pressed again, playback of video information related to the same event is resumed. Furthermore, when the shooting switch 8 is pressed and held, playback of video information relating to the next event, that is, the event recorded immediately before, is started. By continuing to hold down the shooting switch 8, video information relating to all events recorded on the memory card 6 can be reproduced.
  • the above is a device for effectively using the photographing switch 8, which is only one operation means in the drive recorder 2, but other operation means can be provided in the drive recorder 2. is there.
  • the CPU 24 has a certain time after entering the playback mode (for example, (30 seconds or more) If the shooting switch is not operated, it is preferable to perform booting processing again (see S71) and restart. As a result, after restarting, the user can be prompted to cancel the playback mode by sounding the playback mode buzzer.
  • FIG. 22 shows the playback order
  • FIG. 23 shows a flow of an operation example of the memory card 6.
  • the user sets the memory card 6 to be used to be writable and inserts it into the I / F 4 11 of the playback device 400 to initialize the card (S 90).
  • card initialization the data previously recorded in the memory U card 6 is deleted by CP U 4 2 4 and the user who operates using the memory card 6 (for example, taxi crew)
  • the user is set to be writable at the start of operation of the vehicle 1 (for example, when the evening crew member starts working on duty (7:45 to 17:15))
  • the initialized memo U card 6 is inserted into the I / F 1 1 of the drive recorder 2 arranged in the vehicle 1, and the drive recorder 2 is set to the recording mode to start data recording (S 9 1).
  • the CPU 24 records video information and operation information for a predetermined period (for example, 20 seconds) in the memory card 6 when the recording condition is satisfied.
  • the memory card 6 for which the data recording has been completed is taken out from the IZF 11 of the drive recorder 2.
  • the user inserts the memory card 6 into the IZF 4 1 1 of the playback device 400, and the video information, operation information, memory card ID, and user ID recorded in the memory card 6 Are read by the playback device 400 side (S 9 2).
  • the CPU 4 2 4 reads the video information, operation information, memory force ID, and user ID recorded on the memory card 6 in response to one operation of one vehicle. .
  • one memory card 6 may be used for a plurality of vehicles or used for a plurality of operations.
  • the display of the visual field area in the playback device 4 0 0 will be described.
  • the first camera 3 and the second camera 4 acquire video information, but the field of view in which the driver actually looks around is different from the inherent field of view of the power camera.
  • a person's field of view is the range that a person can see without changing the position of their eyes.
  • the field of view when the vehicle 1 is stationary is about 200 degrees in the left-right direction and 1 in the vertical direction when viewing both eyes. 1 It is said to be around 2 degrees.
  • the speed of vehicle 1 changes the vicinity will be blurred and only the distance will be seen, resulting in a narrower view of the driver.
  • the field of view tends to narrow with age, so older drivers and younger people have different fields of view. It is said that the field of view of the elderly (for example, over 60 years) is narrower than that of the young (for example, under 60 years). As an example, the field of view can be considered to be 20% narrower.
  • FIG. 6 is a diagram showing a correspondence table of horizontal and vertical viewing angles and vehicle 1 speed used in 400.
  • the area defined by the horizontal and vertical viewing angles, that is, the area where the driver can see without moving his / her eyes is the viewing area.
  • the playback device 400 when reproducing the video information acquired by the drive recorder, the visual field range actually seen by the driver is specified, and how an accident etc. occurs is determined. It is possible to verify. In addition, by specifying the field of view, it can be used for safety education for drivers.
  • the playback device 4 0 0 calculates the vehicle speed from the vehicle speed data in the operation information when displaying video information about each event on the display unit 4 4 0.
  • the viewing angle is obtained from the correspondence table shown in FIG. 24 (recorded in the playback device 400 as a map), and the viewing range is displayed on the screen.
  • the playback device 400 has the following five field-of-view range playback modes, and the user can play back video information by operating one of the modes by operating the operation unit 4 30. It is configured to be able to.
  • Fixed angle mode Displays only the viewing area corresponding to the viewing angle in the horizontal and vertical directions specified by the operation unit 4 30.
  • Vehicle speed mode at the moment of detection Only the viewing area corresponding to the viewing angle in the horizontal and vertical directions corresponding to the vehicle speed at the time when the recording condition is satisfied is displayed.
  • Vehicle speed mode at the playback position The viewing area corresponding to the viewing angle in the horizontal and vertical directions corresponding to the vehicle speed for each still image to be reproduced is displayed in sequence.
  • Fixed speed mode Displays only the viewing area corresponding to the viewing angle in the horizontal and vertical directions corresponding to the speed specified by the operation unit 4 3 0.
  • FIG. 25 is a diagram showing an example of a screen for displaying video information recorded in the memory card 6.
  • the screen display process in FIG. 25 and the process based on the user's operation on the screen are stored in the card information storage unit 4600 according to the CPU 4 2 4 power S and the control program 4 1 7. Is displayed on the display unit 44 0 based on the night.
  • the screen 1 4 0 displayed on the display 4 4 0 includes the ID number data 1 4 1 of the memory card 6 and the time information 1 4 2 included in the operation information.
  • Type information indicating conditions 1 4 3, Latitude data 1 44 in the location information, Longitude data in the location information 1 4 5, and G value 1 4 6 determined according to the flow in Figure 11 1 are displayed Operation status information to be described later when a still image is captured 1 4 7, Area for displaying still images captured by the first camera 3 in sequence 1 4 8—1, Still images captured by the second camera 4 are sequentially displayed Display area 1 4 8-2, Operation buttons for controlling still images taken by the first camera 3 and the second camera 4 1 4 9 (rewind, play, stop, fast forward), still image displayed Vehicle speed information when the image was taken 1 5 0, area for displaying the selected view range playback mode 1 5 1, aged Region 1 5 2 for indicating the correction there-No is displayed. .
  • the first frame 1 5 3-1 showing the field of view and the second frame 1 5 3-2 showing the field of view corrected for the elderly are displayed.
  • a first frame 1 5 4 1 1 indicating the visual field range and a second frame 1 5 4-2 indicating the visual field range subjected to the elderly correction are displayed.
  • the visual field range can be displayed more clearly by changing the display method between the first and second frames.
  • the vehicle speed mode at the moment of detection since the vehicle speed mode at the moment of detection is selected as shown in the area 15 1, it corresponds to the vehicle speed (for example, 40 k mZh) when the recording condition is satisfied.
  • the viewing area corresponding to the horizontal viewing angle (1400 degrees) and the vertical viewing angle (78 degrees) is displayed as the first frame 1 5 3 — 1 in the area 1 4 8 — 1. (See Figure 24).
  • the viewing angle in the horizontal direction (1 1 2 degrees) and the viewing angle in the vertical direction (6) corresponding to the vehicle speed (for example, 40 km / h) at the time when the recording conditions are satisfied are corrected.
  • the field of view corresponding to (3 degrees) is displayed in the area 1 4 8-1 as the second frame 1 5 3-2 (see Figure 24). The same applies to the region 1 4 8-2.
  • the user controls the operation button 1 4 9 to capture 100 seconds of still images taken by the first camera 3 for 10 seconds and the second camera 4. 10 still images captured in 10 seconds are displayed while sequentially switching to the display areas 1 4 8-1 and 1 4 8-2. At the same time, information corresponding to the displayed still image is displayed in the display 'input areas 14 1 to 1 4 7 and 1 5 0.
  • the screen 140 shown in FIG. 25 is an example, and other screen configurations can be selected.
  • the visual field range is displayed on the video information recorded on the memory card 6 so that the driver can It is now possible to verify the video information acquired by the drive recorder while distinguishing between the area that is in view and the area that is not.
  • the driver's field of view can be made closer to the actual situation.
  • the recording conditions and the video information are displayed on the same screen.
  • an operation button for displaying the recording conditions is displayed as an image. It is also possible to display on the same screen and display the recording conditions as a separate window by operating the operation button.
  • Fig. 26 shows the operational status classification process flow.
  • the memory capacity 6 stores video information and the like related to events when a predetermined recording condition is satisfied. However, it is important to classify which operation is performed and the recording condition is satisfied when the recorded video information is verified in the playback device 400. Therefore, the playback device 400 has a function of automatically classifying each event according to the processing flow shown in FIG. 26 using the recorded video information and operation information.
  • the CPU 4 2 4 selects a predetermined event, and G 1 value (acceleration sensor) corresponding to each of 30 still images before and after the recording condition is satisfied for one camera.
  • G 1 value acceleration sensor
  • the output of the axis parallel to the front-rear direction of vehicle 1 in Fig. 5), the G 2 value (the output of the axis parallel to the left-right direction of vehicle 1 in acceleration sensor 5), and the vehicle speed data are acquired as sample data (S 1 0 0).
  • CPU 4 2 4 applies the least squares method to the values of 10 points before and after that sample, and calculates the slope of the change in each sample. Calculate (S 1 0 1). Further, the peak of the slope waveform of each sample is specified before and after the recording condition is satisfied (S 1 0 2).
  • the CPU 4 2 4 specifies the operation status of the target event from the relationship between the peak mass file that specifies each predetermined operation status described later and the peak obtained in S 92. (S 1 0 3) A series of processing is terminated.
  • the operation status specified for each event is displayed when the video information about each event is displayed on the display unit 44 (see area 1 4 7 in FIG. 25).
  • the identified driving status is displayed as an icon set for each driving status, for example, superimposed on the image in the upper right corner of the image. This makes it possible to properly grasp the driving status of the event being played. You can also search and narrow down events by driving status classification. As a result, it is possible to reproduce the extracted image only for the driving situation to be confirmed.
  • Fig. 27 is a diagram showing sample rows and the like.
  • the vertical axis shows the G 1 value
  • the horizontal axis shows the time
  • FIG. 27 shows a sample string 2 00 of G 1 values for a predetermined event obtained according to S 1 0 0 of FIG.
  • the waveform 2 10 is an inclination waveform obtained by connecting the inclinations of the samples constituting the sample string 2 0 0 obtained according to S 1 0 1 in FIG.
  • point 2 is an inclination waveform obtained by connecting the inclinations of the samples constituting the sample string 2 0 0 obtained according to S 1 0 1 in FIG.
  • FIG. 28 shows the peak of the waveform 2 10 after the recording condition is satisfied.
  • FIG. 28 shows an example of the peak mass file.
  • the G 1 value, G 2 value, and the peak value related to vehicle speed (see S 1 0 2 in Fig. 26) corresponding to the five driving situations mentioned above, that is, the upper and lower limits Before and after the recording conditions are met
  • the operating status is specified by specifying the range within each operating status shown in Fig. 28 within the upper and lower limits of each operating status shown in Fig. 26. (S 1 0 3 in Figure 26).
  • the shaded area is the part where the peak is specified, and the peak value is not specified in other parts.
  • Each value specified in the peak mass file shown in Fig. 28 should be able to be corrected using the edit screen 16 0 displayed on the display unit 44 0 shown in Fig. 29. Is preferred.
  • the edit screen 1 60 shown in Fig. 29 is used to correct conditions related to sudden start.
  • the values specified in the peak master file shown in Fig. 28 are examples, and other values can be adopted, and the vehicle speed can be taken into account as a condition.
  • FIG. 30 is a diagram showing a typical pattern indicating the driving situation of sudden start.
  • Fig. 30 (a) shows a sample sequence 30 0 of G 2 values
  • Fig. 30 0 (b) shows a sample sequence 30 1 of G 1 values
  • the slope waveform of each sample is obtained from the G 1 value, G 2 value, and vehicle speed sample sequences, and the driving situation is judged based on the peak values before and after the recording conditions are established.
  • G 1 value sample string
  • the slope waveform 3 0 3 of each sample is obtained from 3 0 1 and the peak value 3 0 4 before the establishment of the recording condition is between 1 and 0.2 2.0. Judgment was made suddenly.
  • Fig. 31 shows a typical pattern showing the driving situation of sudden braking.
  • Fig. 3 1 (a) shows the G 2 value sample sequence 3 1
  • Fig. 3 1 (b) shows the G 1 value sample sequence 3 1
  • Fig. 3 1 (c) shows the vehicle speed sample sequence. 3 1 2 is shown.
  • T 0.
  • the slope waveform of each sample is obtained from the G 1 value, G 2 value, and vehicle speed sample sequences, and the driving situation is judged based on the peak values before and after the recording conditions are established.
  • the gradient waveform 3 1 3 of each sample is obtained from the sample sequence 3 1 1 of the G 1 value, and the peak value 3 1 4 force ⁇ 3.0 to 0.5 before the recording condition is established Because the peak value 3 1 5 after the establishment of the recording condition was between 1 and 0.4 3.0, it was judged that the brake was sudden.
  • Fig. 32 shows a typical pattern showing the operating conditions of normal braking.
  • Fig. 3 2 (a) shows the G 2 value sample sequence 3 2
  • Fig. 3 2 (b) shows the G 1 value sample sequence 3 2 1
  • Fig. 3 2 (c) shows the vehicle speed sample sequence. 3 2 2 is shown.
  • T 0.
  • the slope waveform of each sample is obtained from the G 1 value, G 2 value, and vehicle speed sample sequences, and the driving situation is judged based on the peak values before and after the recording conditions are established.
  • the slope waveform 3 2 3 of each sample is obtained from the G 1 value sample string 3 2 1 and the peak value before the recording condition is established 3 2 4 ⁇ 0.5 to 0.0 Since the peak value 3 2 5 after the recording condition is satisfied is between ⁇ 0.0 5 0.5, it was judged as normal braking.
  • Figure 33 shows a typical pattern showing the driving situation of the left-hand steering wheel.
  • Fig. 3 3 (a) shows the G 2 value sample sequence 3 30, Fig. 3 3 (b) shows the G 1 value sample sequence 3 3 1, and Fig. 3 3 (c) shows the vehicle speed sample sequence. 3 3 2 is shown.
  • T 0.
  • the slope waveform of each sample is obtained from the G 1 value, G 2 value, and vehicle speed sample sequences, and the driving situation is judged based on the peak values before and after the recording conditions are established.
  • the slope waveform 3 3 3 of each sample is obtained from the G 2 value sample string 3 30, and the peak value 3 3 4 before the establishment of the recording condition is 2.0 to 0.1. Because it was between, it was judged to be a left-hand drive.
  • Figure 34 shows a typical pattern showing the driving situation of the right-hand steering wheel.
  • Fig. 3 4 (a) shows the G 2 value sample sequence 3 4
  • Fig. 3 4 (b) shows the G 1 value sample sequence 3 4 1
  • Fig. 3 3 (c) shows the vehicle speed sample sequence. 3 4 2 is shown.
  • T 0.
  • the slope waveform of each sample is obtained from the G 1 value, G 2 value, and vehicle speed sample sequences, and the driving situation is judged based on the peak values before and after the recording conditions are established.
  • the slope waveform 3 4 3 of each sample is obtained from the G 2 value sample string 3 4 0, and the peak value 3 4 4 force S before the recording condition is established, 1 0.1 to 1 Since it was between 2.0, it was judged as a right-hand drive.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)

Abstract

La présente invention a pour objet un enregistreur de conduite permettant de reproduire des informations graphiques enregistrées dans un organe d'enregistrement. L'enregistreur de conduite est caractérisé en ce qu'il comprend une première unité de détection pour détecter que l'organe d'enregistrement a été inséré dans l'enregistreur de conduite, une seconde unité de détection pour détecter si l'organe d'enregistrement se trouve dans un état d'interdiction d'écriture, ainsi qu'une unité de commande destinée à émettre une commande visant à faire fonctionner l'enregistreur de conduite en un mode de reproduction permettant de reproduire les informations graphiques enregistrées dans l'organe d'enregistrement, quand la seconde unité de détection détecte que l'organe d'enregistrement se trouve dans l'état d'interdiction d'écriture, après que la première unité de détection a détecté que l'organe d'enregistrement a été inséré dans l'enregistreur de conduite.
PCT/JP2008/067981 2007-09-28 2008-09-26 Enregistreur de conduite WO2009041721A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007255819A JP4684272B2 (ja) 2007-09-28 2007-09-28 ドライブレコーダ
JP2007-255819 2007-09-28
JP2007-255877 2007-09-28
JP2007255877A JP4531085B2 (ja) 2007-09-28 2007-09-28 ドライブレコーダ

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WO2009041721A1 true WO2009041721A1 (fr) 2009-04-02

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PCT/JP2008/067981 WO2009041721A1 (fr) 2007-09-28 2008-09-26 Enregistreur de conduite

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WO (1) WO2009041721A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014102800A (ja) * 2012-11-22 2014-06-05 Frc:Kk ドライブレコーダ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62110689A (ja) * 1985-11-08 1987-05-21 Matsushita Electric Ind Co Ltd 情報記録再生装置
JPH08235484A (ja) * 1995-02-28 1996-09-13 Fujitsu Ten Ltd 事故時のデータ記録装置
JP2006236112A (ja) * 2005-02-25 2006-09-07 Fuji Photo Film Co Ltd 電子機器及び記録媒体のライトプロテクト方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62110689A (ja) * 1985-11-08 1987-05-21 Matsushita Electric Ind Co Ltd 情報記録再生装置
JPH08235484A (ja) * 1995-02-28 1996-09-13 Fujitsu Ten Ltd 事故時のデータ記録装置
JP2006236112A (ja) * 2005-02-25 2006-09-07 Fuji Photo Film Co Ltd 電子機器及び記録媒体のライトプロテクト方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014102800A (ja) * 2012-11-22 2014-06-05 Frc:Kk ドライブレコーダ

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