JPH0518717Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a moving object confirmation device at T-junctions, crossroads, etc.

[Prior Art] Conventionally, in order to check left and right at a T-junction or a crossroads intersection, when a car 1 approaches an intersection, a moat such as a block along the road is used as shown in Fig. 8. 2, it is impossible to check left and right unless the car 1 moves out to the position shown in the figure, and it is extremely dangerous if pedestrians, motorbikes, bicycles, etc. drive near the car. It is especially dangerous if a car moves forward.

[Problems to be solved by the invention] According to the prior art, for example, Utility Model Application No. 58-56646
As shown in the publication, fender mirrors installed on the left and right sides of the fender of an automobile are provided with shutters for opening and closing the housing and side mirrors, and when the shutters are opened, the side view is displayed by the side mirrors. There is a known device that does this, but in this case, it is necessary to open and close the shirt, which is not only very cumbersome to operate, but also cannot be confirmed without looking at the outside mirror.

In addition, as shown in Japanese Utility Model Application No. 56-8729, surveillance cameras are installed on the left side and rear of the vehicle for safety confirmation, and images taken by the cameras are displayed on a monitor installed near the driver's seat. There are also known devices in which the image is displayed, but the problem is that the device is not only complicated and very expensive, but also that it is troublesome because it cannot be confirmed without looking at the monitor screen.

An object of the present invention is to provide an inexpensive moving object confirmation device that allows easy confirmation of left and right sides when a vehicle is temporarily stopped.

[Means for Solving the Problems] In order to achieve such an objective, the present invention incorporates a solid-state image sensor that converts images into electrical signals and a condensing lens that focuses light onto this solid-state image sensor in a vehicle. It is installed on the front left and right sides of the vehicle in a position that captures images in the left and right directions from the vehicle.Based on the signal from the solid-state image sensor, if there is a moving object when the vehicle is stopped, it will be displayed on the display, and if a moving object is approaching, it will be displayed on the display. A distinctive feature of the system is that an alarm is used to notify the user of the situation.

[Operation] In this invention, a solid-state image sensor (Charge Coupled Device: hereinafter referred to as CCD) is installed at the front left and right sides of the vehicle.
is installed, and its output is used to display any moving objects when the vehicle is stopped, as well as to notify you if a moving object approaches, making it easy for the driver to look to the left and right. A moving object can be confirmed and can be done inexpensively.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the state of an automobile equipped with a moving object confirmation device according to the present invention, in which a solid-state image sensor 4 and a condensing lens 5, which will be described later, are mounted on the front left and right sides 3 of the automobile 1. It is installed in an arrangement that images the direction.

FIGS. 2a and 2b show an example of the mounting position of the solid-state image sensor 4 and the condenser lens 5, such as mounted on the side of a bumper 6 at the front of the automobile 1.

Note that these devices may be attached to the front body of the vehicle.

FIG. 3 shows an electric circuit of an embodiment of the moving object confirmation device according to the present invention, and 11 is a constant voltage power source for driving the system. 5-1 and 5-2 are condenser lenses attached to the left and right sides of the automobile; 4-1 and 4-2 are also attached to the left and right sides of the automobile; condenser lenses 5-1; and a CCD that converts the image from 5-2 into an electrical signal,
12 is a high-speed A/D converter that converts the electrical signals (analog values) from CCD4-1 and 4-2 into digital signals.
The D converter 13 is a vehicle speed sensor that determines whether the vehicle is running or stopped. 14 is the CPU,
15 is a RAM, 16 is a ROM, and the CPU constitutes a control unit that processes, stores, calculates, and compares the outputs of the high-speed A/D converter 12 and the vehicle speed sensor 13.
17 is a display driver, 18 is a display device, 19 and 2
0 is a left and right warning section consisting of a buzzer, LED, and transistor.

In such a configuration, the CPU 14 mentioned above
Then, based on the output of the high-speed A/D converter 12, if there is an object approaching or moving away from the vehicle, data on its external shape is sent to the display driver 17 and displayed on the display 18. Further, when another car, bicycle, pedestrian, etc. approaches, a signal is sent to the warning units 19 and 20 to notify the display driver 17 by a buzzer sound and LED light emission.
The warning section changes the tone of the buzzer by changing the frequency of the signal from the CPU 14.
You can also change the blinking of the LED.

FIG. 4 shows the display 18 and warning parts 19, 2.
This shows an example of 0, and the display 18 displays if there is a moving object, and if there is not, displays, for example, "OK". Also, if a moving object approaches, the LED
19 and 20 are lit and a buzzer sound is emitted.

FIG. 5 shows an example of a specific configuration of a solid-state image sensor, in which a plurality of pixels 21 are arranged in a matrix, and the outputs of these pixels are taken out to a vertical register 22 by various timing signals and passed through a horizontal register CCD 23. A signal output is taken out from the output terminal 24. FIG. 6 shows the timing signals of each part in FIG. 5, 31 is a transfer gate pulse for taking in the data in the pixel 21 to the vertical register 22, 32 and 33 are the transfer gate pulses for taking in the data in the pixel 21 to the vertical register 23, and the pixel _{a 0} of line L1 is sent to the horizontal register 23. ₃₄ and 35 are read clock pulses for outputting the data of the horizontal register 23, and 36 is a signal output from the output terminal 24. The data on line L1 is output in the cycle of timings 31 to 35 described above, and then the cycle of timings 32 to 35 is repeated four times,
Data on lines L2 to L5 is output.

FIGS. 7a and 7b show the operation flow of the control section of the apparatus shown in FIG. 3. When the ignition is turned on, the system voltage power supply 11 is turned on and the system is started. First, the output of the vehicle speed sensor is checked to determine whether the vehicle is running (step 41). If the vehicle is not running, an electrical signal corresponding to the image is read from the solid-state image sensor 4 at a predetermined timing (step 41).
42), stores it in part b of RAM 15 (step 43), and compares the stored content at the previous timing {part a of RAM 15} with the stored content at the current timing {portion b of RAM 16} (step 43). 14), it is determined whether there is any data difference between them (step 45), and if there is no difference, the warning section is turned off (step 46) and the process returns to step 41. If there is a difference between the two data, first set all the data in the specific part c of the RAM 15 to "00" (step 47),
Next, set the different parts of the data stored at the previous and current timings to “FF” and transfer them to the RAM 15.
(step 48). The portion sandwiched between the portions containing this "FF" data is also changed to "FF" (step 49). Through this processing, the outer shape of the moving object and its contents can be displayed on the display.

Also, in this way, the number of pixels in the data section that are set to "FF" is written into register B (step 50). Thereby, the area of the moving object can be determined. Next, the contents of part b of the RAM 15 are transferred to part a (step 51), and the contents of register C, which contains the area corresponding to the data fetched at the previous timing, are compared with the contents of register B (step 52). ), if B > C (step 53), it is determined that the moving object is moving away,
Turn off the warning units 19 and 20 (step
54). If B>C, it is determined that the moving object is approaching, and the warning units 19 and 20 are turned on depending on whether they are moving to the left or right (step 55) (steps 56, 57).

Next, the contents of register B are transferred to register C (step 58), portion c of RAM 15 is transferred to display driver 17 (step 59), and the contents are further transferred to display 18 and displayed (step 60). .

[Effects of the invention] As described above, according to the invention, a condenser lens and a solid-state image sensor are attached to the front left and right sides of a vehicle in a position that captures images in the left and right directions from the vehicle, and when the vehicle is stopped, the vehicle can be moved. If there is an object, it will be displayed, and if a moving object is approaching, it will be notified to that effect, so when you temporarily stop at a T-junction, crossroad intersection, etc., you can check for moving objects on the left and right. It can be easily performed with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the running state of a car equipped with the device of the present invention, FIGS. 2a and 2b are schematic diagrams showing the mounting positions of the solid-state image sensor and the condenser lens of the device of the present invention, and FIG. The figure is an electric circuit diagram showing the configuration of an example of the moving object confirmation device according to the present invention, FIG. 4 is a diagram showing an example of the display state of the display and warning section of FIG. 3, and FIG. 6 is a flowchart showing the operation timing of FIG. 5; FIGS. 7a and 7b are diagrams showing the processing flow of the operation of the device shown in FIG. 3; FIG. 1 is a diagram showing a driving state of an automobile for explaining a conventional device. 4... Solid-state image sensor, 5... Condensing lens, 14
...CPU, 18...Display unit, 19,20...Warning section.

Claims (1)

[Scope of utility model registration request] A solid-state image sensor that is attached to the front side of a vehicle in a position that captures images in the left and right directions from the vehicle and that converts images into electrical signals, and a condenser lens that is provided at a position facing the solid-state image sensor; an A/D converter that converts an electrical signal from a solid-state image sensor into a digital signal; a vehicle speed sensor that detects the speed of the vehicle; and when it is determined that the vehicle has stopped based on the output from the vehicle speed sensor, A movement characterized by comprising: a CPU that displays the moving object on a display means based on the output from an A/D converter, detects the movement of the moving object, and causes a notification means to notify that fact. Object confirmation device.