CN101900816A - Backing image device with distance measuring function - Google Patents

Abstract

A reverse image device with distance measuring function comprises: the device comprises a luminous source, a lens group and a display, wherein the luminous source is arranged at the tail of the automobile and can project a light ray which generates a pattern on an object to be detected; the lens group is arranged at the tail of the automobile, a lens, a photosensitive assembly and a circuit board are arranged in the lens group, the lens collects images at the rear of the automobile on the photosensitive assembly, and the circuit board calculates the distance between an object to be detected and the tail of the automobile according to the compactness of a pattern read by the photosensitive assembly; the display is arranged in the vehicle for a driver to watch and is electrically connected with the lens group, so that the display displays the image of the object to be detected and the distance between the object to be detected and the vehicle. The distance between the object to be detected and the vehicle is calculated according to the compactness of the pattern projected on the object to be detected by the luminous source, so that the driver can avoid the misjudgment of the distance between the object to be detected and the vehicle; the light is invisible light, so that the influence of vehicles or pedestrians coming from the rear can be avoided.

Description

Reversing image device with ranging function

technical field

The present invention mainly discloses a reversing image device with a distance measuring function, especially a reversing image device that uses light to project on an object to be measured to measure the distance from the vehicle.

Background technique

Referring to Fig. 9 to Fig. 11, it is a schematic diagram and a display screen of a conventional reversing image device, which has a lens 101 and a display 102, and there are a first object to be tested a and a second object to be tested b at the rear of the car, wherein the first The height and size of the test object a and the second test object b are approximately equal, and when the lens 101 collects the first test object a and the second test object b respectively, on the screen of the display 102, the first test object a The visual distance from the vehicle is shorter than the visual distance from the second object to be measured b, which visually matches the actual distance. Continuing to refer to Fig. 12 to Fig. 14, there is a third UUT c and a fourth UUT d behind the car, the height of the third UUT c is smaller than the height of the fourth UUT d, and the lens 101 captures the third UUT respectively. When measuring the object c and the fourth object c, on the screen of the display 102, the height and size of the third object c and the fourth object d are the same, but in fact the height and size of the fourth object d are The distance is farther than the third object under test c, so the image obtained by the conventional reversing imaging device cannot accurately determine the distance of the object under test from the vehicle.

Referring to Fig. 15, in order to solve the above problem, someone uses two lenses 103 and 104 to measure the distance from the vehicle of the object under test e, and uses the principle of triangulation to calculate the distance from the vehicle of the object under test e using trigonometric functions. It must cost a lot to measure the object under test with two lenses, which does not meet the economic needs. Therefore, the inventor is committed to researching a reversing image that can measure the distance between the object under test and the vehicle without costly device to solve the problems in the prior art.

In view of the lack of the above-mentioned conventional structure, the inventors have invented a reversing image device with a ranging function, which can overcome all the shortcomings of the above-mentioned conventional structure.

Contents of the invention

The purpose of the present invention is to solve the technical problem of high cost when judging the distance from the vehicle of the object under test in the existing reversing imaging device.

In order to achieve the above object, the present invention provides a reversing image device with ranging function, including:

A light source, which is arranged at the rear of the car, projects a light from the light source, and produces a pattern on the object to be tested;

A lens group, which is arranged at the rear of the car, has a lens, a photosensitive component and a circuit board in the lens group, and the lens collects the image behind the car on the photosensitive component, and the circuit board is based on the photosensitive component. The tightness of the read pattern is calculated to calculate the distance between the object under test and the rear of the car;

A display is installed in the vehicle for the driver to watch, and is electrically connected to the lens group. The display displays the image of the object under test and the distance of the object under test from the vehicle.

The beneficial effect of the present invention is that the distance from the vehicle to the object to be measured can be calculated through the tightness of the pattern projected by the light source on the object to be measured, so as to avoid the driver's misjudgment of the distance from the vehicle to the object to be measured; the light is invisible light , so it will not affect the cars or pedestrians coming from behind.

Other objects, advantages and novel features of the present invention will be more apparent from the following detailed description and associated drawings.

Description of drawings

FIG. 1 is a schematic structural view of a reversing image device with a ranging function according to the present invention;

Fig. 2 is the detailed enlarged view of Fig. 1 of the present invention;

Fig. 3 is a schematic diagram of the use of the reversing image device with distance measuring function according to the present invention;

4 is a schematic view of the display of the reversing imaging device with distance measuring function of the present invention, showing the image of the first object to be measured and the distance from the car;

5 is a schematic view of the display of the reversing imaging device with distance measuring function of the present invention, showing the image of the second object to be measured and the distance from the car;

FIG. 6 is another schematic diagram of the use of the reversing imaging device with distance measuring function of the present invention;

7 is a schematic view of the display of the reversing image device with distance measuring function of the present invention, showing the image of the first object to be measured and the distance from the car;

8 is a schematic view of the display of the reversing imaging device with distance measuring function of the present invention, showing the image of the third object to be measured and the distance from the car;

FIG. 9 is a schematic diagram of a conventional reversing imaging device;

FIG. 10 is a display screen of a conventional reversing image device;

Fig. 11 is a display screen of a conventional reversing image device;

FIG. 12 is a schematic diagram of a conventional reversing imaging device;

FIG. 13 is a display screen of a conventional reversing image device;

FIG. 14 is a display screen of a conventional reversing image device;

FIG. 15 is a schematic diagram of another reversing imaging device.

Explanation of reference signs:

101-lens; 102-display; 103-lens; 104-lens; a-first DUT; b-second DUT; c-third DUT; d-fourth DUT; e- Object to be measured; 10-light source; 11-light; 12-pattern; 20-lens group; 21-lens; 22-photosensitive component; 23-circuit board; 30-display; 31-image display area; 32-distance display Area; A-first DUT; B-second DUT; C-third DUT; D-fourth DUT; L1-distance from the car; L2-distance from the car; L3-distance from the car Distance; L4-distance from the car; H1-height; H2-height; H3-height; H4-height.

Detailed ways

Regarding the technology, means and effects used in the present invention, a preferred embodiment is given and described in detail below with drawings, which are for illustration purposes only, and are not limited by this structure in the patent application.

Referring to FIG. 1, it is a schematic diagram of the use of the distance measurement function of the present invention. The present invention includes a light source 10, a lens group 20 and a display 30 to measure the images of the first object to be measured A and the second object to be measured B. and the distance from the vehicle, among which:

Referring to Fig. 2 to Fig. 5, the light emitting source 10 is installed at the rear of the automobile, and the light emitting source 10 can project a light ray 11, which can be projected on the objects under test A and B at the rear of the automobile, and on the object under test A pattern 12 appears on A and B, and the pattern 12 is a regularly arranged mesh grid. The light 11 is invisible light, so it will not affect the cars or pedestrians coming from behind. The tightness of the grid on objects A and B can measure the distance between the rear of the car and the objects A and B to be tested.

The lens group 20 is located at the rear of the car, and the lens group 20 has a lens 21, a photosensitive component 22 and a circuit board 23, and the lens 21 collects the images of the objects A and B to be tested on the photosensitive component 22, and the photosensitive component 22 Obtain images of the objects to be tested A and B behind the car, and the photosensitive component 22 can read the patterns 12 projected by the light 11 on the objects to be tested A and B, and the circuit board 23 then reads the images according to the photosensitive component 21 Figure 12 calculates the distance between the objects under test A, B and the rear of the car. Wherein the photosensitive component 22 is a photosensitive component of a photocoupler device (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS).

The display 30 is installed in the front of the car for the driver to watch. The display 30 is electrically connected to the lens group 20 to receive the image behind the car collected by the lens group 20. The display 30 has an image display area 31 and A distance display area 32. In this embodiment, the image display area 31 and the distance display area 32 are located on the screen of the same screen. Of course, the image display area 31 and the distance display area 32 can also be on different screens. On the screen, the image display area 31 displays the rear image, and the distance display area 32 displays the distances between the objects under test A, B and the rear of the vehicle.

Suppose the distance between the first object A and the rear of the vehicle is L1, the distance between the second object B and the rear of the vehicle is L2, and the distance L1 of the first object A is smaller than that of the second object The distance L2 from the vehicle of B, and the height H1 of the first object A to be tested is the same as the height H2 of the second object B to be tested. The lens group 20 collects the images of the first object A and the second object B respectively, when the light source 10 respectively projects light 11 on the first object A and the second object B, as shown in Fig. 4 and Fig. 5, the display 30 shows that the tightness of the pattern 12 produced on the body of the first test object A is higher than that of the pattern 12 produced on the second test object B, and the first test object A occupies The area is larger than the area occupied by the second analyte B. When there are more than two objects to be tested on the image display area 31 , the distance display area 31 will display the objects to be tested that are closer to the vehicle.

Referring to FIG. 6 to FIG. 8, it is another schematic diagram of the use of the reversing imaging device with distance measuring function according to the present invention. There is a third object C and a fourth object D to be measured behind the car. Assume that the third object C and the vehicle The distance from the rear of the vehicle is L3, the distance from the fourth object D to be measured is L4 from the rear of the vehicle, the distance L3 from the third object C is less than the distance L4 from the fourth object D to be measured, and the distance from the fourth object D to be measured is L4. The height H3 of the third test object C is less than the height H4 of the fourth test object D, as shown in Figure 7 and Figure 8, the display 30 shows that the tightness of the pattern 12 produced on the third test object C is higher than that of the fourth test object C. The generated pattern 12 on the body of the analyte D has a high density, and the area occupied by the third analyte C is the same as the area occupied by the fourth analyte D. Although the images presented by the third object C and the fourth object D in the image display area 31 have the same size, the driver can still know the distance between the third object C and the fourth object D through the distance display area 32. The vehicle distance L3, L4, in order to prevent the driver from being unable to judge the vehicle distance L3, L4 of the objects C and D to be tested.

Can conclude that the present invention has the following advantages with regard to the above:

1. The reversing image device with distance measuring function of the present invention calculates the distance from the vehicle of the object to be measured through the tightness of the pattern projected by the light source on the object to be measured, so as to avoid the driver's misunderstanding of the distance from the vehicle to the object to be measured. sentenced.

2. The reversing image device with distance measuring function of the present invention, wherein the light is invisible light, so it will not affect the vehicles or pedestrians coming from behind.

The above description of the present invention is illustrative rather than restrictive. Those skilled in the art understand that many modifications, changes or equivalents can be made to it within the spirit and scope of the claims, but they will all fall into within the protection scope of the present invention.

Claims (7)

1. a reverse image device that contains distance measurement function is characterized in that, includes:

One light emitting source, it is located at automobile tail, and this light emitting source projects a light, and this light also produces a pattern on determinand;

One lens group, it is located at automobile tail, have a camera lens, a photosensory assembly and a circuit board in this lens group, this camera lens is gathered the image at automobile rear on described photosensory assembly, this circuit board calculates the distance away from the car of described determinand and automobile tail again according to the tight ness rating of the pattern that this photosensory assembly read;

One display, it is located in the car and watches for the driver, and electrically connects this lens group, and this display shows the distance away from the car of determinand image and determinand.

2. the reverse image device that contains distance measurement function as claimed in claim 1 is characterized in that, this photosensory assembly is the photosensory assembly of photoelectric coupling assembly.

3. the reverse image device that contains distance measurement function as claimed in claim 1 is characterized in that, this photosensory assembly is the photosensory assembly of complementary metal oxide semiconductor (CMOS).

4. the reverse image device that contains distance measurement function as claimed in claim 1 is characterized in that, this pattern is regularly arranged netted grid.

5. the reverse image device that contains distance measurement function as claimed in claim 1 is characterized in that, this light is invisible light.

6. the reverse image device that contains distance measurement function as claimed in claim 1 is characterized in that, has an image viewing area and a distance display district on this display, to show the image and the distance away from the car of determinand.

7. the reverse image device that contains distance measurement function as claimed in claim 6 is characterized in that, when having two determinands on this image viewing area, this distance display district can show the determinand that distance away from the car is nearer.

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