An optical distance measuring device for a vehicle

A technology for optical distance measurement and vehicle use, which is applied in the directions of measuring devices, distance measurement, line-of-sight measurement, etc., and can solve problems such as inability to measure distance, inability to determine the position of the horizon line, and inability to determine the observation line of sight.

Active Publication Date: 2018-10-26
北京鼎盛时代文化传播有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, it is not always possible to be lucky enough to see the horizon. When there are uphills, buildings or mountains in the distance, the position of the horizon cannot be determined, that is, the above-mentioned observation horizon cannot be determined, and thus the distance cannot be measured.

Method used

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  • An optical distance measuring device for a vehicle
  • An optical distance measuring device for a vehicle
  • An optical distance measuring device for a vehicle

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Experimental program
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Effect test

Embodiment 1

[0044] The overall overview of the technical solution is: windshield scale scale + mirrored eye level reference point, see the schematic diagram figure 2. The eye level reference point B in the figure is a point that is printed or installed at a specific position on the instrument panel using materials that are likely to produce obvious mirror images (high-resolution colors, fluorescent materials, luminous materials or electronic light-emitting devices). The mirror image B' of , and the reference point A of the eye level on the windshield determine the observation eye level. When the two points coincide in the line of sight of the human eye, distance measurement can be performed. Wherein the eye level reference point A is located on the windshield, for example, it can be located directly in front of the driver, and its height is approximately the same as the height of the human eyes 55 . The eye level reference point B can be located on the car dashboard, and the driver can ...

Embodiment 2

[0046] The overall overview of the technical solution is: mirror scale scale + windshield reference point, see the schematic diagram image 3 . image 3 Among them, the scale scale seen by human eyes is also composed of mirror images. The method is to make a series of scales on dark materials (1, 2, 3, 4...), become the real scale scale, it is placed under the windshield, its first end is used as the eye level reference point B, and its second end extends towards the windshield, which can be connected with the windshield Windshield intersects or does not intersect. This physical scale is imaged in the windshield as a mirrored scale. The eye level reference point A is still pre-made on the windshield. Adjust the position of the physical scale to make it mirror the uppermost scale (1') and point A to form the observation eye level, and then adjust the angle of the physical scale , so that the mirror image of each scale (2', 3', 4'...) and the corresponding scale of the virtua...

Embodiment 3

[0048] The overall overview of the technical solution is: mirror scale scale + eye level reference rod, see the schematic diagram Figure 4 .

[0049] In this scheme, the eye level reference point A located on the windshield in Embodiment 2 is also canceled, so that it is not necessary to make a reference point on the windshield in advance, but use an eye level reference rod 3, two of which The ends are used as the reference point A of the eye level and the reference point B of the eye level. Such as Figure 4 As shown, by pre-calibrating, adjust the placement position and angle of the sight-level reference rod 3, so that the mirror-image points of the sight-level reference point A and the sight-level reference point B at both ends of the baffle glass The reference point A' and the horizon reference point B' are on the observation horizon. Fix the position of the eye level reference rod and it will be used for distance measurement. The scale scale still uses the mirror ima...

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Abstract

The invention discloses an optical ranging device for an automobile. According to the device, a visual borizon reference point A is set on a front windshield of the automobile, a visual borizon reference point B is set below the windshield, the observing visual borizon is determined by judging whether a mirror point B' of the visual borizon reference point B in the windshield coincides with the visual borizon reference point A or not, and the distance between an object in the distant place and a driver is directly observed through a mirror image of a scaleplate printed or stuck on the windshield or an objective scaleplate located below the windshield in the windshield according to the similar triangle principle. The device changes visual range estimation into actual ranging, is simple, easy to operate and low in cost and can be not only independently used by serving as an automobile accessory, but also prefabricated in a naked automobile just leaving a factory.

Description

technical field [0001] The invention belongs to the field of vehicle equipment, and in particular relates to a vehicle optical distance measuring device. Background technique [0002] Car drivers often need to judge the distance between distant targets and themselves, but it is often only a visual estimate, which is difficult to estimate quantitatively. [0003] A simple quantitative estimation method is to use geometric calculation methods, such as figure 1 As shown, a scale is vertically placed in front of the driver's eyes, where H is the height from the human eye to the ground, h is the height of the line of sight on the scale when observing the ground point of the object to be measured, D is the measured distance, d is the horizontal distance between the human eye and the scale. According to the principle of similar triangles: [0004] D / d=H / h [0005] Then D=Hd / h Formula 1 [0006] Among them, H and d have been calibrated in advance and are known quantities, then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/24
CPCG01C3/24
Inventor 徐斌
Owner 北京鼎盛时代文化传播有限公司
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