WO2012088684A1

WO2012088684A1 - Ambient brightness detection device

Info

Publication number: WO2012088684A1
Application number: PCT/CN2010/080467
Authority: WO
Inventors: 邹高迪
Original assignee: Zou Gaodi
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2012-07-05

Abstract

An ambient brightness detection device includes a transparent glass ball (3), a cover (1), a base (2), a photosensitive component (5), a positioning device for the glass ball and a shading device for image acquisition. The cover (1) is opaque, and includes upper and lower open ends. The base (2) includes an inner cavity (21). The inner side of the lower open end of the cover is sleeved on the outer side of the base, and mating positioning structures are arranged between the cover and the base. The photosensitive component is arranged in the imaging area, which is provided in the inner cavity and located behind the focus of the transparent glass ball. The positioning device is used for positioning the transparent glass ball on the upper open end of the cover. The shading device for image acquisition includes a transmission area (41) on the shading component and a shading component (4) provided between the transparent glass ball and the light-sensitive component. The detection device can realize ambient brightness detection, which is consistent with perceptual effect of human eyes for ambient light. The device has advantages of low cost, easy installation and use.

Description

Environmental brightness detecting device

The invention relates to an ambient brightness detecting device. Background technique

Under the global trend of energy conservation and emission reduction, how to effectively use and control the ambient light around people's work and life becomes a research topic directly linked to energy utilization, but how to effectively and accurately detect ambient light is The first problem to be solved.

Existing detection methods, one is illuminance detection, and the other is brightness detection. From the definition of illuminance, illuminance is the luminous flux per unit area. If it is only used to judge the total amount of luminescence or light efficiency of a illuminant and the illumination level of a certain area, it is feasible, but the illuminance and human visual perception are not complete. Direct and decisive relationship, in addition to illuminance, human visual illumination is also related to the color depth of the object and the flatness of the surface of the object, that is, the reflection and absorption of light with the object and the physical shape of the surface of the object. The angle is related to the scattering of light. Brightness is the degree of human visual brightness. From the physiological structure and visual principle of the human eye, the optical imaging detection method can truly represent the light environment that people feel, and the light sensing and the market are currently using Most of the control devices use photoresistors, photocells, photodiodes, phototransistors, etc., directly on the surface of the object or directly detect the incident light. Thus, the direct illumination of the incident light is the illuminance value, directly detecting the surface of the object. When the photosensitive device is too close, a point of the object is detected. When the distance is increased, the light near the photosensitive device is detected by various reflections, the mixed value of the refraction and the direct light, and the brightness of the human eye is not represented. . However, the existing optical imaging methods are methods using single or multiple optical lenses. Although the brightness can be accurately detected, the optical lens has complicated process, high processing difficulty, and assembly in order to meet the precision requirements. When it comes to optical imaging products, the precision of assembly is also very high, especially the assembly of multiple lenses, precision and process requirements are higher. Summary of the invention

The technical problem to be solved by the present invention is that there is an optical lens as an optical imaging unit. The high production cost and high precision of assembly precision provide a new environmental brightness detection device, which reduces production cost and assembly precision. The technical solution adopted by the present invention to solve the technical problem thereof is: constructing an environmental brightness detecting device, comprising: a transparent glass ball, a cover body, a seat body, a photosensitive element, a glass ball positioning device, and an image acquisition light shielding device;

The cover body is opaque, the cover body comprises an upper and lower open end, the base body comprises an inner cavity, and the inner side of the lower open end of the cover body is matched with the outer side of the seat body; the transparent glass ball is positioned by the glass ball The device is positioned on the open end of the cover body; the cover body and the base body further comprise a matching positioning structure;

The photosensitive element is disposed in an inner cavity of the housing and located in an imaging area behind the focus of the transparent glass ball;

The image capture shading device includes a light blocking member between the transparent glass ball and the photosensitive member and a light passing region disposed on the light blocking member, the light blocking member blocking entry into the cover through the transparent glass ball The stray light enters the internal cavity of the housing to reach the photosensitive element, the light passing area is located on the optical path behind the focus of the transparent glass ball, and the imaged concentrated light of the transparent glass ball passes through the light passing area .

In the ambient brightness detecting device of the present invention, the glass ball positioning device comprises: an inner side of the open end of the cover body and a hollow compression elastic member disposed between the transparent glass ball and the seat body; or The invention includes an annular positioning surface disposed on the open end of the cover body and elastically surrounding the transparent glass ball; or includes an inner side of the open end of the cover body and a threaded or tight fit with the inner side of the cover body and the transparent The glass ball is pressed against a positioning ring on the inside of the open end of the cover.

In the ambient brightness detecting device of the present invention, the light passing region is a through hole or a window through which light passes; the light blocking member is a light blocking wall of an inner cavity of the base body, and the light passing region is disposed at the light blocking a central portion above the wall; or the light shielding member includes an inner cavity cavity wall of the base body and a light shielding sheet disposed at an upper opening of the cavity wall, the light shielding sheet including a light shielding region and the through hole disposed in a middle portion of the light shielding region Light zone.

In the ambient brightness detecting device of the present invention, the mating positioning structure is as follows: a buckle and a card slot disposed between the inner side surface of the cover body and the outer side surface of the outer cover; or a seat body disposed at the seat body An outer thread groove corresponding to a threaded hole and a screw disposed on a side of the cover body to cooperate with the thread groove, the cover body and the seat body being engaged with the threaded hole by the screw, and the screw end and the thread groove The mating connection is fixed; or includes an external thread disposed on the outer side of the outer sleeve and an inner thread correspondingly disposed on the inner side of the cover body, the cover body and the seat body are matched by the inner and outer threads The connection is fixed; or the inner side of the cover body is tightly fitted to the outer side surface of the seat body.

In the environmental brightness detecting device of the present invention, a PCB board is included, which is connected to the photosensitive member and disposed in the internal cavity of the holder.

In the environmental brightness detecting device of the present invention, a fixing base is included; and the fixing base is provided on a rear side of the bottom of the housing.

In the ambient brightness detecting device of the present invention, the fixing base and the lamp tube clamp are included; the fixing base is disposed on the rear side of the bottom of the base body, and the bottom of the fixing base is provided with a card slot; The card slot is engaged with the fixing seat.

In the environmental brightness detecting device of the present invention, the transparent glass ball is spherical or ellipsoidal. In the environmental brightness detecting device of the present invention, the cover body and the seat body are both cylindrical.

The environmental brightness detecting device embodying the present invention has the beneficial effects compared with the prior art:

1. The present invention uses a transparent glass ball instead of an optical lens to realize optical imaging, and then uses a photosensitive element to perform brightness detection on the formed optical real image, thereby realizing ambient light brightness detection consistent with the human eye's perception of ambient light;

2. The shading device is obtained by setting the adjustment structure and imaging of the cover body and the seat body, so that the detecting device can accurately acquire the imaging light of the target to be measured, and shield the undesired scattered light, thereby improving the detection accuracy;

3. The precision of the structure of the glass ball and the detecting device is low, the manufacturing cost is greatly reduced, and the installation and use are simple. DRAWINGS

The present invention will be further described with reference to the accompanying drawings and embodiments in which:

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective structural view showing an embodiment of an ambient light detecting device of the present invention.

Figure 2 is a side elevational view of an embodiment of the ambient brightness detecting device of the present invention.

Figure 3 is a cross-sectional view showing an embodiment of the ambient brightness detecting device of the present invention. Figure 4 is a partial cross-sectional view showing an embodiment of a glass ball positioning device in the ambient brightness detecting device of the present invention.

Fig. 5 is a partial cross-sectional view showing another embodiment of the glass ball positioning device in the environmental brightness detecting device of the present invention.

Figure 6 is a cross-sectional view showing an embodiment of an image capturing shading device in the ambient brightness detecting device of the present invention. detailed description

As shown in FIG. 1 to FIG. 3, the ambient brightness detecting device of the embodiment includes: a cover body 1, a base body 2, a transparent glass ball 3, a light shielding sheet 4, a photosensitive member 5, a PCB board 6, a fixing base 7, and a lamp tube. The clip 8, wherein: the cover 1 is opaque, the upper and lower ends of the cover 1 are open, and the base 2 includes an internal cavity 21 for mounting the photosensitive member 5. In the present embodiment, the PCB board 6 is connected to the photosensitive element 5 and disposed in the internal cavity 21. In other embodiments, the PCB board 6 may be disposed at other structural positions of the housing 2 outside the internal cavity 21, Even if the PCB board 6 is separated from the ambient brightness detecting device, and the PCB board 6 is connected to the photosensitive member 5 in use, the object of the present invention can be achieved.

The inner side of the lower end of the cover body 1 is matched with the outer side of the base body 2, and the cover body 1 and the base body 2 are positioned and engaged by the positioning and matching structure. The positioning and mating structure may include but not limited to the following structures:

1. The cover body 1 and the base body 2 are fixedly connected by a snapping manner. At this time, a buckle can be arranged on the inner side surface of the cover body 1, and a card corresponding to the buckle is arranged on the side of the base body 2 correspondingly. The slot body, the cover body 1 and the base body 2 are snap-fitted by the buckle and the card slot; or vice versa, the card body 1 is provided with a card slot on the inner side of the cover body 1, corresponding to the side of the base body 2 being provided with the card slot The buckle body, the cover body 1 and the base body 2 are snap-fitted by the buckle and the card slot. When the positioning fit structure is adopted, the position between the cover body 1 and the base body 2 is fixed.

2. A threaded groove is arranged on the outer side of the seat body 2, and a threaded hole is formed on the side of the cover body 1 to cooperate with the thread groove. The cover body 1 and the seat body 2 are engaged with the threaded hole by the screw 9, and the end of the screw 9 The head is fixedly coupled to the thread groove. The position between the cover 1 and the base 2 can be adjusted by using this positioning fit structure.

3. External thread is arranged on the outer side of the seat body 2, corresponding to the outer thread on the inner side of the cover body 1. The mating internal thread, the cover body 1 and the seat body 2 are fixed by the internal and external threaded joints. When the positioning fit structure is adopted, the position between the cover body 1 and the seat body 2 can be adjusted.

4. The inner side surface of the cover body 1 and the outer side surface of the seat body 2 adopt a tight fit structure. When the positioning structure is used, the position between the cover 1 and the base 2 is fixed.

The transparent glass ball 3 is positioned at the upper open end of the cover 1 by a glass ball positioning device. The glass ball positioning device may take the form including, but not limited to, the following:

1. As shown in FIG. 3, the glass ball positioning device includes an inner side of the open end of the cover body 1 and a hollow pressure elastic member 14 disposed between the transparent glass ball 3 and the base body 2. The hollow pressure elastic member 14 can be used as Cylindrical compression springs, ring rubber columns, etc.

2. As shown in FIG. 5, the glass ball positioning device comprises an annular positioning surface disposed on the open end of the cover body 1 and elastically surrounding the transparent glass ball 3, and the transparent glass ball 3 is pressed into the annular positioning surface for positioning.

3. As shown in FIG. 4, the glass ball positioning device comprises an inner side of the open end of the cover body 1 and a positioning ring 15, and the positioning ring 15 is screwed or tightly fitted with the inner side of the cover body 1, and the transparent glass ball 3 is pressed against the cover body. 1 inside the open end.

The photosensitive member 5 is disposed in the inner cavity 21 of the housing 2 and is located in the imaging area behind the focus of the transparent glass sphere 3 to receive the reflected light of the object to be measured focused by the transparent glass sphere 3.

The image-obtaining light-shielding means includes a light-shielding member between the transparent glass ball 3 and the photosensitive member 5 and a light-passing region 41 provided on the light-shielding member. The light shielding member functions to prevent stray light entering the inside of the cover body 1 through the transparent glass ball 3 from entering the internal cavity 21 of the seat body to reach the photosensitive member 5. The light passing region is located on the focused light path behind the focus of the transparent glass ball 3, and is transparent. The imaged collected light of the glass sphere passes through the light passing region 41 to the photosensitive member 5.

In order to satisfy the measurement of the different target objects, the imaging light of the target is passed through the light-passing area, and the clear glass ball 3 and the light-passing area of the image-obtaining light-shielding device can be realized by the adjustable positioning and matching structure of the cover body 1 and the seat body 2. The distance between them is guaranteed. For a specific use case, under the premise that the measurement adjustment of the target to be measured is determined, the fixed positioning and matching structure of the cover 1 and the base 2 can be adopted to meet the measurement requirements of the predetermined measurement conditions, and the object of the present invention can also be achieved.

The imaging acquisition shading device may take the form including, but not limited to, the following: 1. As shown in FIG. 6, the light-shielding member is a light-shielding wall of the inner cavity 21 of the base body 2, and the light-passing portion 41 is disposed at a central portion of the upper portion of the light-shielding wall (in other embodiments, light passing through may also be adopted). Window structure).

2. As shown in FIG. 3, the light shielding member includes a cavity wall of the inner cavity 21 of the base 2 and a light shielding sheet 4 disposed at an upper opening of the cavity wall, the light shielding sheet 4 including a light shielding area and disposed in the middle of the light shielding area The light passing area 41, the light passing area 41 may adopt a through hole or a window structure through which light is passed. The fixing base 7 is fixed to the bottom rear side of the base body 2, and at the bottom is provided with at least one pair of card slots 11, and the left and right portions of the lamp tube clamp 8 are respectively engaged with the fixing base 7 through the card slots 11. In other embodiments, the purpose of the present invention can be achieved without providing the fixing base 7 and the lamp holder 8, or only the fixing base 7, and not the lamp holder 8.

The transparent glass sphere 3 can be spherical or ellipsoidal. Since the transparent glass ball 3 is a glass having a thick center and a thin edge, it functions as a condensing function and functions as a convex lens. When the ambient brightness detecting device is in operation, since the cover 1 is opaque and the upper end is open, ambient light illuminates the end surface of the transparent glass ball 3 exposing the cover 1, and is then concentrated by the transparent glass ball 3 to focus and pass. The central through hole of the light shielding sheet 4 is incident on the surface of the photosensitive member 5; since the photosensitive member 5 has a characteristic of being sensitive to light, the change in the brightness of the ambient light causes a change in its resistance value, thereby causing a voltage change at both ends thereof, and thus the PCB board 6 The current ambient light level can be calculated from the voltage change of the photosensitive element 5.

In the present embodiment, the cover 1 and the base 2 have a cylindrical structure. In other embodiments, the cover 1 and the base 2 may adopt other structures, such as a prismatic structure, to achieve the object of the present invention.

Claims

Claim

What is claimed is: 1. An ambient brightness detecting device, comprising: a transparent glass ball, a cover body, a seat body, a photosensitive element, a glass ball positioning device, and an image acquisition light shielding device;

2. The ambient brightness detecting device according to claim 1, wherein the glass ball positioning device comprises: an inner side of the open end of the cover body and disposed between the transparent glass ball and the seat body Hollow compression elastic member; or an annular positioning surface disposed on the open end of the cover body and elastically surrounding the transparent glass ball; or including an inner side of the open end of the cover body and threaded with the inner side of the cover body Or a tight fit and press the transparent glass ball against the positioning ring on the inside of the open end of the cover.

The ambient brightness detecting device according to claim 1, wherein the light passing region is a through hole or a window through which light is passed; the light shielding member is a light shielding wall of an inner cavity of the base body. The light-passing region is disposed at a middle portion of the light-shielding wall; or the light-shielding member includes an inner cavity cavity wall of the base body and a light shielding plate disposed at an upper portion of the cavity wall, the light shielding plate includes a light shielding region and is disposed at The light passing area in the middle of the light shielding area.

4. The ambient brightness detecting device according to claim 1, wherein the mating positioning structure comprises: a buckle and a card slot disposed to cooperate with each other between the inner side surface of the cover body and the outer side surface of the outer cover; Or including a thread groove disposed outside the seat body, correspondingly disposed on the side of the cover body and the seat a threaded hole and a screw that cooperate with the thread groove, the cover body and the seat body are engaged with the threaded hole by the screw, and the screw end is fixedly coupled with the thread groove; or includes a screw body disposed on the outer side of the seat body An external thread and an internal thread correspondingly disposed on the inner side of the cover body, wherein the cover body and the seat body are fixedly coupled by the inner and outer threads; or the inner side surface of the cover body is The outer side of the seat is tightly fitted.

The ambient brightness detecting device according to any one of claims 1 to 4, further comprising a PCB board connected to the photosensitive element and disposed in the internal cavity of the housing.

The ambient brightness detecting device according to any one of claims 1 to 4, further comprising: a fixing seat; wherein the fixing seat is disposed at a rear side of the bottom of the seat body.

The ambient brightness detecting device according to any one of claims 1 to 4, further comprising: a fixing base and a lamp tube holder; wherein the fixing base is disposed at a bottom rear side of the base body, the fixing seat A card slot is disposed at the bottom; the lamp clip is coupled to the fixing seat through the card slot.

The ambient light detecting device according to any one of claims 1 to 4, wherein the transparent glass ball is spherical or ellipsoidal.

The environmental brightness detecting device according to any one of claims 1 to 4, wherein the cover body and the seat body are both cylindrical.