KR100743108B1 - Video recording system in vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording a driving state of a vehicle, wherein a digital camera for installing a video camera photographing a situation in front of a vehicle by installing a video camera in a vehicle is stored in a temporary storage device (RAM) having a predetermined capacity in real time. Record and continuously update the image data (file) of the driving situation for a certain period of time, and (1) Whenever the running speed of the vehicle becomes 0, the file stored in the temporary memory device (multiple files can be recorded). (2) Dump the files stored in the temporary memory to the main memory whenever the running speed of the vehicle becomes 0. If there is a preservation request, save the last dumped file, or (3) If the user requires a recording even if the operation speed is not 0, the temporary memory file is dumped to the main memory. By preserving, when the vehicle stops or the user requests, the video signal for the front situation for a predetermined time is preserved so that the progress of the automobile accident or the like may be revealed.

Video signal, speed, main memory, temporary memory, dump

Description

Video recording system for automobiles {Video recording system in vehicle}

1 is a block diagram showing the configuration of an embodiment of the present invention,

FIG. 2 is a schematic diagram conceptually illustrating a relationship between a temporary memory device and a main memory device in the configuration of FIG. 1; FIG.

3 is a diagram illustrating an operation of the configuration of FIG. 1 as an example of a driving state of a vehicle;

4 is a flow chart illustrating a program flow in a controller for implementing an operation that the controller of FIG. 1 should perform;

5 is a block diagram showing the configuration of another embodiment of the present invention;

6 is a diagram illustrating an operation of the configuration of FIG. 5 as an example of a driving state of a vehicle;

FIG. 7 is a flowchart illustrating a program flow in a controller for implementing an operation that the controller of FIG. 5 should perform. FIG.

The present invention provides a video signal recording apparatus for accurately identifying which process or whose accident occurred when an accident occurs while driving a vehicle.

In the conventional invention, a method of detecting an accident by using an impact sensor or inertia, etc., and taking a moment or recording a driving situation for a long time on a video tape or the like has been proposed. It is difficult to shed light on the progress, and the method of recording the driving condition for a long time has disadvantages that the mechanical mechanism necessary for tape recording is not only weak to vibration but also expensive.

The present invention, in order to solve the disadvantages of the conventional proposals, provides a method for simplifying the recording of the image while recording the progress of a certain time when the accident occurred.

As shown in the block diagram of FIG. 1, the first embodiment, which is the minimum configuration including the spirit of the present invention, is installed in a specific position of a vehicle and includes a video camera 1 for photographing a situation in front of the vehicle, and photographed images. It consists of a recording system (2) for recording and a speedometer (3) for measuring the speed of the vehicle and outputting speed data (sd) which is digitalized. The recording system 2 also has a controller 21 for controlling the temporary memory device 22 and the main memory device 23 with sd as an input, a temporary memory device 22, a main memory device 23, and the video camera ( And a signal processing device 24 for receiving the video signal output from 1), converting it into digital data, and converting it into a format that can be recorded in the temporary memory device 22.

The temporary memory device 22 is a storage device such as a RAM. Hereinafter, for convenience of explanation, the temporary memory device 22 has a structure of a shift register. However, the temporary memory device 22 may use a general RAM but may change the address when writing data to the RAM. The capacity of the temporary memory device 22 is related to the time of one moving picture (hereinafter, referred to as "file") to be recorded, and the capacity of the temporary memory device is used to indicate the operation situation to reveal the progress of an accident. In order to do so, it is enough to record a video file of tens of seconds to one minute. On the other hand, the main memory device 23 is a storage device such as a flash memory that can electrically record and delete data, but does not lose stored data even when the power is turned off, and requires a capacity for recording a plurality of files. Do. In addition, the user can take out the main memory device 23 or install a new one, so that after the video to be stored is recorded, the user can take out the main memory device and store it separately. 2 conceptually illustrates the relationship between the temporary memory device 22 and the main memory device 23. That is, the digital data (current video data, cvd) of the image currently being recorded is always recorded at the first address (p1) of the temporary memory device 22, and at the same time, all the image data that has been recorded previously are on the right side. Moving to the address, the image data recorded at the last address p (n) is destroyed when new data comes in. N image data (buffered video data, bvd) stored in the temporary storage device 22 constitutes one file. In FIG. 2, the main memory device 23 has a capacity for recording five files. The current file is represented by the number f3. (Although the description below assumes that the main memory can record five files, it can actually use dozens of files.)

The operation of the video recording system as described above is as follows. The controller 21 records the digital data (cvd) of the image captured by the video camera 1 in the temporary memory device 22 in real time. When the vehicle stops while driving, that is, sd was not zero. When the value is changed to 0, the controller 21 moves the file currently recorded in the temporary memory device 22 to the corresponding address of the main memory device 23 according to the preset file number. (Hereinafter, this process will be referred to as "dump".)

Referring to the example shown in Figure 3 described above the operation is as follows. In FIG. 3, it is assumed that the vehicle has stopped seven times from t1 to t7. Whenever the speed of the car is not 0 and becomes 0 (t1 ... t7), a data dump is performed.Whenever a data dump is made, the number of the dumped file is increased by one, but again after the maximum file number f5. f1 is given and recorded. In the example of FIG. 3, after t7, the file dumped by t1 and t2 is lost to main memory 23, and the file dumped by t3, t4, t5, t6 and t7 is recorded.

In general, in the case of a minor accident such as a contact accident, both drivers stop the car once and cover the fertilization, so that the user takes out the main memory 23 and keeps the vehicle separately while the vehicle is stopped. It is possible to obtain video data that can reveal how the contact accident occurred in the file. In addition, even if a driver loses consciousness or dies due to a large accident such as a collision, the car will stop, so the main memory stores data that can identify the circumstances of the accident.

4 simply shows a flow of a program inside the controller 21 for implementing the above operation. When the program is started, first, a file number (file number, fn) is set to 1 to set an address to be recorded in the main memory device 23 (s1), and waits for the vehicle to start to move (s2). In order to detect that the car starts to move, the controller 21 compares the current speed data (sd) with a reference speed (rs), and if sd <rs, repeats the waiting process, sd> rs If so, proceed to the next step. Here, rs is a constant value close to 0, and by using the judgment of "sd> rs application", it is possible to prevent an error that dumps are unnecessary when the vehicle moves finely. When the vehicle is out of s2, the vehicle is now in motion, so it waits for the speed to become zero again (s3). If the vehicle is stopped, it dumps data to the address of the main memory set according to the value of fn (s4). Waiting for the car to start moving again (s5), if the car moves, increase the file number by one (s6) and repeat the process after s3, so that the operation described above can be performed.

Although not shown in the block diagram of FIG. 1 and the flow chart of FIG. 4, the operation of recording the current video data (cvd) into the temporary memory device 22 includes a vertical sync. A traffic light can be input to the controller's interrupt terminal and executed in real time using the interrupt routine. Vertical sync during the main program. Whenever a signal is input, the program is configured to perform a routine of leaving the main program routine for a while and recording the image data of one frame into the temporary storage device 22 and then returning to the main routine, thereby performing the main routine of FIG. Cvd can be recorded in the temporary memory device 22.

FIG. 5 is a block diagram of still another embodiment of the present invention, and the core idea of the present invention, that is, to perform some functions substantially required for recording a video whenever the speed becomes 0, can be additionally performed. It is. That is, in the configuration of FIG. 5, the input includes a plurality of buttons and outputs command data (command data, cd) corresponding to the user's pressing of the button so that the user's requirements can be input to the controller 21. A device (4) and a display (5) for replaying the recorded screen have been added, and in the configuration inside the recording system (2), a register (25) for recording a preserved file number (pfn) to be preserved, Clock 26 for outputting time data (time data, td), character generator (27) for receiving td and sd and outputting corresponding character video signal (cvs), video signal of video camera And a mixer 28 for synthesizing the cvs and a signal processor 29 for processing the recorded video data (recorded video data, rvd) to produce a video signal suitable for the display (5). In FIG. 5, the register 25 is illustrated as a separate component. However, since the existing controllers have registers that can be used by themselves, the registers within the controller may be actually used.

First, in the configuration of FIG. 5, by adding the elements of 26, 27, and 28, the speed and current time of the car are added as captions to the video currently being captured to more clearly determine the fault or responsibility in the event of an accident. There is an advantage to get a video that can be done.

In addition, in the configuration of FIG. 5, an input device 4 capable of inputting a user's requirement is added, so that the user's judgment is irrespective of a request (preservation request) or speed for preserving a recently dumped file. In some cases, a record request can be made unconditionally. (More specifically, it is necessary to input various items such as selecting a file to be displayed through the input device 4, releasing a saved file, setting a current time, and the like. Will be omitted.)

The details of the preservation request and the recording request will be described below by taking the situation shown in the diagram of FIG. 6 as an example. In the example of Fig. 6, the speed has become 0 at 11 times t1, t2, ... t11, and the storage request is inputted at t12 and the recording request at t13 via the input device 4. That is, in this chart, 11 dumps from t1 to t11 have a data dump at a speed of 0, and a data dump has been performed at t13 (with a non-speed speed of 0) according to a recording request. When the data is dumped at t2, the file number of f2 is given, and the save request is input at t12 before t3, so the controller 21 records the file number 2 to be stored in the register 25. When the car stops again at t7 and a data dump is made, instead of deleting the existing f2 and writing the data in its place (because f2 is the file to be saved), the file of f3 is deleted while the data is written in its place. Give a number. In addition, since a recording request was received from the user at t13, another pfn 4 is additionally recorded in the register while data dump is performed at the position f4, and two data of 2 and 4 are recorded in the register 25. Therefore, after this situation, the files to be dumped will be f1, f3, and f5 except f2 and f4. In this way, when the save request is inputted, the last dumped file is saved. When the write request is inputted, the dump file is immediately dumped and the file is saved. The data can be preserved continuously, so that the important video can be secured without the user taking out the main memory 23 and storing it separately. Of course, even if the driver is in an unconscious state due to a serious accident and cannot record or save, the dump is automatically made when the car stops, so that important video data remains recorded. .

The program flow in the controller 21 for implementing such a recording process is briefly shown in FIG. 7. The controller 21 first checks the data in the register 25 to check whether the register data points to all the file numbers (s7 and s8). At this time, if all the files are preserved, the main memory 23 does not have enough space to write a new file. Therefore, the user is notified that there is no memory space (s9), and the main memory is replaced or preserved. You may be asked to release the file. (For convenience of explanation, the program is marked as finished.) If there is a recording space available in the main memory 23, avoid the pfn and set the file number to the next number of the last recorded file number (s10), and then the speed is 0. (S11) (omitted in FIG. 7, but waits for the speed to rise to 0 again after a certain speed as shown in FIG. 4) or waits for a write request to come in (s13). If the vehicle is stopped, the dump process (s12) at speed 0 is performed, and if a record request is received, the dump process (s14) is performed according to the record request.

In the dump routines (s12) at speed 0, in addition to the operation of dumping the data, the number of the currently dumped file is written into the controller in preparation for the preservation request and the file number setting in the next loop (s10). In this case, it is configured to exit the routine by waiting for the speed to rise above the reference speed again. Handling the preservation request can consist of another interrupt routine. That is, when a preservation request is inputted, it moves to the preservation request interrupt processing routine, and writes the last dumped file number recorded in the controller to register 25 and returns to the main routine. In the dump routine (s14) according to the write request, three operations are performed: data dump, writing the current file number in the controller, and writing the current file number in the register 25.

With the above-described configuration and operation, the video recording system of the present invention updates the video for a predetermined time in real time, taking a picture of what is happening in front of the vehicle, and then, when the speed reaches 0 or the user requests, Recorded in the main memory, it is possible to obtain important video data about the accident occurred in all cases of minor contact accidents or serious accidents, and at the same time economical and stable recording because there is no need for mechanical means to record images. It will provide a means.

Claims (3)

delete An image recording apparatus applied to a vehicle, comprising: a video camera (1) installed in a vehicle, a recording system (2) for recording an image photographed by the video camera, a digital speedometer (3) for measuring the speed of the vehicle, and a user It consists of an input device (4) for inputting the requirements of the recording system (2) is a controller (21) for controlling the entire system, a capacity for recording a video data (file) of a certain time Main memory device 23, comprising a temporary memory device 22 having a memory that does not erase stored data even when power is not supplied, such as a FLASH memory, and having a capacity for recording a plurality of files, outputted from the video camera It is composed of a signal processing device 24 for converting and processing the video signal to digital data, the controller 21 is -The moving picture data output from the signal processing device 24 is recorded in the temporary memory device 22 in real time, and when the vehicle stops while driving, that is, the output of the digital speedometer is above the reference speed rs. Becomes 0, the data (file) recorded in the temporary memory device is transferred to the main memory device 23 and dumped. -When a preservation request is inputted by the user through the input device 4, the number of the last dumped file (file to be preserved) or an address in the main memory where the file is recorded is stored and then executed. By referencing this in the dump process, the subsequent dump process is performed without deleting the file to be preserved. -When a recording request is input from the user through the input device 4, the file recorded in the temporary storage device is immediately dumped into the main memory, and the number of the dumped file or the main memory device in which the file is recorded. A video recording apparatus for automobiles, characterized by storing an address and referencing it in another dump process to be performed later, so that a subsequent dump process is performed without deleting the file. The video recording apparatus of claim 2, wherein the speed of the vehicle is displayed in the moving picture to be recorded.

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