CN204421886U - A kind of optical distance measurement apparatus - Google Patents

Abstract

The utility model discloses a kind of optical distance measurement apparatus, comprise light source, this light source provides light to by range finding body surface; Also comprise light grid, light therethrough light grid directive is by object of finding range; And camera, this camera obtains the light spot image be projected in by range finding object; Light grid is positioned at light source front, camera be placed in light source side any position and towards testee.The utility model has the advantages that: structure is simple, and cost is low.Can be applicable on production line and measure the position of product on operator's console, when remotely-piloted vehicle flies in narrow space, measure the distance of aircraft and wall, measure the occasion such as distance (such as somatic sensation television game) lower than velocity of sound mobile object.

Description

A kind of optical distance measurement apparatus

Technical field

The utility model relates to a kind of distance measuring equipment, particularly a kind of optical distance measurement apparatus.

Background technology

Existing optical ranging method, be divided into direct method and phase ranging, namely direct method is measured light and is come and gone the time required for target, then calculates distance by the light velocity and air index, and the phase differential that namely phase ranging measures transmitting and receiving light wave obtains range-to-go.The mensuration coming and going the time required for target due to the measurement light in direct measuring method is very high to the accuracy requirement of timer, so conventional optical ranging method is phase ranging.In existing optical ranging method, measuring object must be vertical with emergent light, otherwise return signal is too faint cannot obtain accurate distance; On the other hand, the dependence of existing optical ranging method to environment is higher, e.g., if measured target surface diffuse reflectance is too serious, then cannot receive return signal; If when measured target object surface shape is uneven, also may causes measuring light and cannot return receiver thus cause the result that cannot find range.Device required for existing optical ranging method, or involve great expense or complex structure, be difficult to improving production efficiency and reduce costs, popularizing difficulty.

Utility model content

The purpose of this utility model is for the deficiencies in the prior art, and provides a kind of optical distance measurement apparatus, and its structure is simple, and cost is low, can realize easy, the quick and range finding requirement that precision is suitable.

The technical scheme realizing the utility model object is:

A kind of optical distance measurement apparatus, comprises light source, and this light source provides light to by range finding body surface;

Light grid, light therethrough light grid directive is by object of finding range;

And camera, this camera obtains the light spot image be projected in by range finding object;

Light grid is positioned at light source front, camera be placed in light source side any position and towards testee.

Described light source, light grid, camera three position are relatively fixing, and the light spot image that the light cast out like this and camera obtain just can keep consistency, to be convenient for measuring.

Described smooth grid is evenly distributed with manhole, can overcomes to greatest extent like this and be caused by the out-of-flatness of range finding body surface the problem of slipping up of finding range.On light grid, the quantity of manhole does not limit with distribution, preferably uses the intensive grid being evenly distributed with manhole.

Described light source is ordinary light source, the artificial light sources such as available incandescent lamp, LED.

The distance-finding method of application the utility model optical distance measurement apparatus is: first fix light source, light grid and camera, object of being found range by benchmark is arranged on the known a place of distance light source, benchmark range finding object and light source, light grid and camera are on same fixed axis, open light source, the maximum length being obtained benchmark range finding body surface hot spot by camera is x pixel, suppose that the angle of divergence of light is W, by equation tan(W)=a/x, the value of angle of divergence W can be calculated; Then measure by the distance of range finding object, by range finding object and light source, light grid and camera on same fixed axis, obtaining by range finding body surface hot spot maximum length by same camera is y pixel, suppose that by the distance of range finding object and light source be b, tan (W)=a/x=b/y can be drawn by the trigonometric function of light source angle of divergence W, then can calculate b=a/x × y, draw the minor increment by range finding object and light source.

Principle of the present utility model is: the light therethrough light grid of light emitting source is according to by range finding object, a certain size hot spot is there will be by the side to light of range finding object, the size of hot spot is directly proportional to distance, camera is now used to obtain by the light spot image of range finding object side to light, after obtaining light spot image maximum length, the minor increment by range finding object and light source can be calculated according to the angle of divergence measured in advance.

The utility model only need normally can be formed hot spot by range finding body surface and be caught on camera head and capture, and can complete range finding.Angle requirement problem and the reflected light Receiver Problem of measuring distance of target thing and emergent light can be avoided like this, more without the need to using the distance measuring equipment of high-precision timer device, expensive generating laser and complexity, manufacture difficulty and the manufacturing cost of stadimeter greatly can be reduced thus.

The utility model has the advantages that: structure is simple, and cost is low.Can be applicable on production line and measure the position of product on operator's console, when remotely-piloted vehicle flies in narrow space, measure the distance of aircraft and wall, measure the occasion such as distance (such as somatic sensation television game) lower than velocity of sound mobile object.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment optical distance measurement apparatus;

Fig. 2 is the parameter schematic diagram of embodiment optical distance measurement apparatus;

Fig. 3 is the schematic cross-section of light grid in Fig. 1;

Fig. 4 is the side to light schematic diagram of benchmark range finding object in Fig. 1;

Fig. 5 is by the side to light schematic diagram of range finding object in Fig. 1.

In figure, 1. light source 2. light 3. smooth grid 4. manhole 5. benchmark finds range object 6. by the hot spot 8. of range finding object 7. benchmark range finding object side to light by hot spot 9. camera of range finding object side to light.

Embodiment

Below in conjunction with drawings and Examples, the utility model content is further described, but is not to restriction of the present utility model.

Embodiment

With reference to Fig. 1-5, a kind of optical distance measurement apparatus, comprises light source 1, and this light source 1 provides light 2 to by range finding object 6 surface; Also comprise light grid 3, light 2 to be found range object 6 through light grid 3 directive; And camera 9, this camera 9 obtains the hot spot 8 be projected in by range finding object 6; Light grid 3 is positioned at light source 1 front, camera 9 be placed in light source side any position and towards testee.

The position of described light source 1, light grid 3, camera 9 three is relatively fixing, and the light spot image that the light cast out like this and camera 9 obtain just can keep consistency, to be convenient for measuring.

Described smooth grid 3 is circular, it is evenly distributed with manhole 4, can overcome to greatest extent like this and be caused by range finding object 6 surface irregularity the problem of slipping up of finding range.On light grid 3, the quantity of manhole 4 does not limit with distribution, preferably uses the intensive grid being evenly distributed with manhole 4.

Described light source 1 is ordinary light source, the artificial light sources such as available incandescent lamp, LED.

The distance-finding method of Application Example distance measuring equipment is: first fix light source 1, light grid 3 and camera 9, object 5 of being found range by benchmark is arranged on the known a place of distance light source 1, benchmark range finding object 5 and light source 1, light grid 3 and camera 9 are on same fixed axis, open light source 1, the maximum length being obtained the surperficial hot spot 7 of benchmark range finding object 5 by camera 9 is x pixel, suppose that the angle of divergence of light 2 is W, by equation tan(W)=a/x, the value of angle of divergence W can be calculated; Then measure by the distance of range finding object 6, by range finding object 6 with light source 1, light grid 3 and camera 9 on same fixed axis, obtaining by range finding object 6 surperficial hot spot 8 maximum length by same camera 9 is y pixel, suppose that by the distance of range finding object 6 and light source 1 be b, tan (W)=a/x=b/y can be drawn by the trigonometric function of light source 1 angle of divergence W, then can calculate b=a/x × y, draw by the minor increment of range finding object 6 with light source 1.

Claims (2)

1. an optical distance measurement apparatus, is characterized in that:

Comprise light source, this light source provides light to by range finding body surface;

Light grid, light therethrough light grid directive is by object of finding range;

And camera, this camera obtains the light spot image be projected in by range finding object;

Light grid is positioned at light source front, camera be placed in light source side any position and towards testee.

2. optical distance measurement apparatus according to claim 1, is characterized in that: described smooth grid is evenly distributed with manhole.