CN103826039A - Monitoring camera capable of zooming - Google Patents

Abstract

Disclosed is a monitoring camera capable of zooming. The monitoring camera includes a rotary support, a built-in camera and a protective cover. A rotary control mechanism is arranged on the rotary support. The camera is connected with the rotary control mechanism so that the camera can be controlled to rotate. The monitoring camera is characterized in that the built-in camera sequentially includes: a first lens group, the focal length of which is f1, a second lens group, the focal length of which is f2, a third lens group, the focal length of which is f3 and an image sensor chip used for receiving images, wherein the distance between the first lens group and the second lens group is variable so that the lens groups are at a wide-angle end or a telescoping end; the moving amount from the wide-angel end to the telescoping end is f3st; the amplification factor of the second lens group at the wide-angle end is R and the zooming ratio of a system is Z; and the value of f1/f3 is between 1.7 and 2.5 and the value of (f3st/f3)/Z is between 0.05 and 0.79.

Description

Varifocal monitoring camera

Technical field

The present invention relates to areas of information technology, be specifically related to a kind of supervising device, particularly a kind of monitoring camera.

Background technology

Safety monitoring technology relates to the every aspect that life is produced, for example: subway, highway communication, hotel, bank etc.

Patent documentation CN201577130U discloses a kind of security monitoring camera with emergency power supply, includes adapter unit, internal electric source memory cell and external voltage detection unit.The disclosed a kind of security monitoring camera with emergency power supply of the utility model, it can be in the time that externally fed goes wrong, can also normally carry out work, guarantee at any time can monitor the desired place of client, greatly improve the monitoring capacity of security monitoring camera, the product that has strengthened client uses impression, has guaranteed the product market share of security monitoring camera manufacturer simultaneously, is of great practical significance.

CN102724394A discloses a kind of examination hall monitoring camera, comprise the interface, audio frequency and video transducer, biometric information sensor, memory module, the control module that are connected with concrete treatment facility, wherein: audio frequency and video transducer is for catching examinee's audio/video information; Biometric information sensor is for catching examinee's biological information; Control module and the concrete treatment facility communication being connected, what obtain examinee examines biological information, and with the biological information comparison that biometric information sensor captures, to carry out examinee's authentication, and result is transferred to concrete treatment facility.The present invention makes examinee's authentication and examination monitor procedure automation, and a reliable and special examination surroundings is provided, and has facilitated the organization and management of online testing, has realized and having taken an examination reliably with minimum overhead management.

CN202385178U discloses a kind of mounting structure of monitoring camera, comprise camera hanging seat and camera, the top of camera is provided with a connection cylinder, one end of described camera hanging seat is an adaptive end of columniform camera hanging column, the inside of the adaptive end of camera hanging column is a cavity that can hold described connection cylinder, and described connection cylinder is provided with a perforation.This novel installation is simple and easy, only need position correspondence is good, utilize and connect cylinder extruding elastic button, make to seal card article by the structure between elastic button and sealing card article and eject, pass the perforation that is connected cylinder, make the space sealing between the adaptive end of bayonet socket and camera hanging column, immediately camera is fixed, in the time that needs are dismantled, again push elastic button with the larger pressure dollying headband cylinder that is dynamically connected, sealing card article is regained from perforation immediately, and camera is detachable.

But the most volumes of monitoring camera of the prior art are excessive, and inconvenience is installed, Stealth Fighter is bad, easily found by people, destroy.And be difficult to take into account volume and image quality.

Summary of the invention

For addressing the deficiencies of the prior art and deficiency, the invention provides a kind of varifocal monitoring camera, can solve many deficiencies of the prior art and defect, there is many-sided advantage.

Concrete technical scheme is as follows:

A kind of varifocal monitoring camera, comprise: runing rest, built-in camera, protective cover, on runing rest, be provided with rotation control mechanism, camera is connected with described rotation control mechanism, be used for controlling described camera rotation, it is characterized in that: described built-in camera comprises successively: focal length is f1 first lens group, focal length is the second set of lenses of f2, with focal length the 3rd set of lenses that is f3, for accepting the image sensor chip of image, the wherein gap variable between first lens group and the second set of lenses, thereby make lens group in wide-angle side or telescope end, amount of movement from wide-angle side to telescope end is f3st, the enlargement ratio that brings out described the second set of lenses at wide-angle is R, the zoom ratio of system is Z:: f1/f3 is value between 1.7 to 2.5, (f3st/f3)/Z is value between 0.05 to 0.79.

As the preferred embodiments of the present invention: be coated with the optical function coating that positive reflective reverse side is transparent on the surface of described protective cover.

As the preferred embodiments of the present invention: described runing rest can rotate with pitch orientation in the horizontal direction.

As the preferred embodiments of the present invention: described imageing sensor has the interface being connected with external image Acquisition Circuit.

Accompanying drawing explanation

The structural representation of Fig. 1 first embodiment of the invention;

The structural representation of Fig. 2 varifocal monitoring camera of the present invention.

The optical texture schematic diagram of camera described in Fig. 3.

Fig. 4 is the structural representation of second embodiment of the invention.

Fig. 5 is the structural representation of third embodiment of the invention.

Fig. 6 is the decomposition texture schematic diagram of camera of the present invention.

Embodiment

For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.

As shown in Fig. 1, Fig. 4 and Fig. 5, a kind of security monitoring camera described in one embodiment of the invention, comprise the electronic zoom camera 1 that is connected with supervising device, for fix and drive that electronic zoom camera 1 rotation control mechanism that rotate and supervising device is connected can level and the runing rest 2 of pitch rotation, for containing the protective cover 3 of described electronic zoom camera 1 and runing rest 2.

For having the existing disguise of the current existing electronic monitoring camera head of solution, flexibility, counnter attack monitoring capacity and protectiveness and soil resistance all very poor; installation difficulty is large, all bad etc. problems of observation visual angle and picture quality, the protective cover 3 of the present invention housing that adopts the single sided perspective glass that front is reflective, reverse side is transparent of the anti-destructive that is coated with titanium or Zirconium oxide nanometer transparent coating to make of serving as reasons.

Like this, making can be by being installed on camera in protective cover, can make camera avoid the pollution of wind and weather and dirt, a more safe and reliable protection is provided and strengthens its attractive, decorative to camera, again camera being hidden in more reliably to outside can't see in the protective cover of the inside, make monitoring camera " change bright for dark ", not only reduce the negative impact intuitively that has reduced that monitoring camera produces the common legal public; Simultaneously, also can improve widely the counnter attack monitoring capacity of camera, can produce huge deterrent force to the one's share of expenses for a joint undertaking of breaking laws and commit crime, contain its delinquent psychology and behavior, playing " allow good person feel at ease, allow bad person soul-stirring " builds harmonious society, effectively prevents delinquent effect.

In addition, can also reduce social security generally with the managerial cost of investment of monitoring camera and maintenance care expense, and the camera that can be suitable for coming into operation in a large number installs transformation, meanwhile, be also applicable to the camera monitoring device of personalized demand of installing.Wherein, in order to make the present invention can be suitable under various different occasions or personalized installation requirements, the structure of above-mentioned protective cover 3 can have multiple, as shown in Figure 1, its structure can be square body or cylinder or bullet or the hemisphere of half sealing, and its peristome is provided with the outer flanging 311 with installing hole 312; Now, this protective cover 3 can be mounted on assigned address by the double-screw bolt of the installing hole 312 through its outer flanging 311.

Or as shown in Figure 4, the structure of described protective cover 3 can be also: it comprises can overlap the base 32 and the cover body 31 that set as one mutually, wherein said base 32 is that a bottom has interior flanging 321, top has the ring set body of the outer flanging 322 with installing hole 323, described cover body 31 is one semi-enclosed reflective by front, the housing that the single sided perspective glass that reverse side is transparent is made, and the peristome of this housing is provided with outer flanging 311, now, described cover body 31 is placed in pedestal 32 and by its outer flanging 311 and connects as one with the overlap joint of the interior flanging 321 of pedestal 32, and the bolt by the installing hole 323 through the outer flanging 322 of pedestal 32 is mounted on assigned address.

Meanwhile, the shape of described base 32 and cover body 31 can be the square body of assembling or the shape and structure of cylinder or cone or spherical etc. of can cooperatively interacting.Or as shown in Figure 53, the structure of described protective cover 3 can also be one to dock square body or cylinder or cone or the spherical of the enclosed shape forming by upper and lower two halves housing 31,32; Now, described upper half-shell 31 inside are provided with an interior bracket 311 that is used for installing camera rotating bracket, and interior bracket 311 and upper half-shell 31 are mounted on assigned address by the bolt of the installing hole 312 that is provided with through upper half-shell 31 tops, and housing lower half 32 is integrated with the screw thread spinning mutually spinning that upper half-shell 31 is provided with by two halves shell nozzle portion.In addition, described protective cover 3 also can also be for other is that fail to mention one by one and structure simple and reasonable for structure, easy to install.

Described camera, has following architectural feature:

This device has a lens barrel 40, for ease of explanation, arrow direction in figure is defined as to the front of this lens barrel 40, and the rightabout of arrow indication is its rear.The strip on this lens barrel 40 with an extension of the fore-and-aft direction along this lens barrel 40 is worn groove 41.This device mainly comprise be fixed on these lens barrel 40 interior forefronts one first lens set 11, be positioned at the first lens set 11 of this lens barrel 40 after and movable second lens group 21 that can move forward and backward, be positioned at these the second lens set 21 rears and be fixed on the 3rd lens set 31 of lens barrel 40.

This first lens set 11 has the ability of optically focused, can collect extraneous light by and enter to this lens barrel 40 inside, to carry out next step optical treatment.

This second lens set 21 is mainly as the use of adjusting focal length variation, and it exposes this driving lever 42 of wearing groove 41 by a microscope base 22 and and engages.User can be by stirring this driving lever 42, makes this microscope base 22 drive this second lens set 21 in the interior movement of this lens barrel 40.In the present embodiment, for moving this second lens set 21 by being extended through this this driving lever 42 of wearing groove 41, when actual enforcement, can take guide rail, cam, connecting rod, spiral tooth to join or the equivalent man-operating mechanism of the member such as gear combines to move this second lens set 21.

The 3rd lens set 31 is for having the liquid lens group of voltage modulation focus function, and wherein this liquid lens can be the deformation formula zoom lens (Shape-changed lens) of dielectric stress effect (Dielectric force), electrowetting effect (Electro wetting effect) or microfluid (Micro fluid).The 3rd lens set 31 can see through the modulation of magnitude of voltage, change the interface curvature between its inner two liquid, change the focal length of himself, make to do again further focusing via the light of this second lens set 21, make extraneous object light be assembled exactly and image on imageing sensor 1.

The diopter of above-mentioned this first lens set 11, this second lens set 21 and the 3rd lens set 31 is sequentially positive and negative, positive configuration mode.

In addition, originally be installed between the second lens set 21 and the 3rd lens set 31, and be close to the 3rd lens set 31 places and be provided with a planoconvex spotlight 51, and this planoconvex spotlight 51 has a projecting surface 511 towards the second lens set 21, in order to by the ray guidance by this second lens set 21 to the 3rd lens set 31.Between the 3rd lens set 31 and this image sensor 1, sequentially settle a biconcave lens 52 and a biconvex lens 53, in order to by the ray guidance by the 3rd lens set 31 to this imageing sensor 1.

To adjust the position of this second lens set 21 with respect to this first lens set 11, make zoom rate lens assembly of the present invention and look in the distance and to change between two kinds of different modes in wide-angle by mobile this driving lever 42.

The focal length of supposing the first lens set 11 is f1, and the focal length of the second lens set 21 is f2, and the focal length of the 3rd lens set 31 is f3, and the amount of movement from wide-angle side to telescope end is f3st, and the enlargement ratio that brings out the second lens set 21 at wide-angle is R, and the zoom ratio of system is Z.:

F1/f3 is value between 1.7 to 2.5, and (f3st/f3)/Z is value between 0.05 to 0.79.In above-mentioned number range time, the aberration of system is less, and overall volume is less.

More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not subject to the restriction of above-mentioned using method; that in above-mentioned using method and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.

Claims (4)

1. a varifocal monitoring camera, comprise: runing rest, built-in camera, protective cover, on runing rest, be provided with rotation control mechanism, camera is connected with described rotation control mechanism, be used for controlling described camera rotation, it is characterized in that: described built-in camera comprises successively: focal length is f1 first lens group, focal length is the second set of lenses of f2, with focal length the 3rd set of lenses that is f3, for accepting the image sensor chip of image, the wherein gap variable between first lens group and the second set of lenses, thereby make lens group in wide-angle side or telescope end, amount of movement from wide-angle side to telescope end is f3st, the enlargement ratio that brings out described the second set of lenses at wide-angle is R, the zoom ratio of system is Z:: f1/f3 is value between 1.7 to 2.5, (f3st/f3)/Z is value between 0.05 to 0.79.

2. monitoring camera as claimed in claim 1, is coated with the optical function coating that positive reflective reverse side is transparent on the surface of described protective cover.

3. monitoring camera as claimed in claim 2, described runing rest can rotate with pitch orientation in the horizontal direction.

4. the monitoring camera as described in claim 1-3 any one, described image sensor chip has the interface being connected with external image Acquisition Circuit.

Images