CN207505001U - Infrared lens focus control - Google Patents
Infrared lens focus control Download PDFInfo
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- CN207505001U CN207505001U CN201721205930.6U CN201721205930U CN207505001U CN 207505001 U CN207505001 U CN 207505001U CN 201721205930 U CN201721205930 U CN 201721205930U CN 207505001 U CN207505001 U CN 207505001U
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Abstract
The utility model is related to a kind of infrared lens focus control, including：Focusing execution unit, the focusing execution unit include driving motor and driving mechanism；Central processing unit, the central processing unit are electrically connected with the focusing execution unit, and to focus, instruction will be transferred to focusing execution unit from central processing unit；Focusing control unit, the focusing control unit includes manual focusing arrangement and automatic focusing trigger device, wherein the manual focusing arrangement and automatic focusing trigger device are connected respectively with the central processing unit.Infrared lens focus control according to the present utility model, manual focusing mode and automatic focusing mode is integrated, and simple in structure, small, focusing is flexibly light.
Description
Technical Field
The utility model belongs to infrared thermal imaging field especially relates to an infrared camera lens focusing device.
Background
The thermal imaging is to receive the infrared radiation energy distribution diagram of the measured target by using an infrared detector and an optical imaging objective lens to form an infrared thermal image reflected on a photosensitive element of the infrared detector, so as to obtain the infrared thermal image, wherein the thermal image corresponds to the thermal distribution field on the surface of the object. In the application aspect, the typical industries only need to focus on electric power online temperature measurement, forest fire prevention, human body temperature measurement, water conservancy, island monitoring and the like. However, as the use requirements of terminal customers increase and the technical competitive pressure of various manufacturers of thermal imaging products increases, the common automatic focusing lens and manual focusing lens technologies have not been met, and a lens with a new technology integrating manual and automatic functions gradually appears in the market, but the technology is still very weak at present.
Chinese patent CN102385139B discloses an infrared lens focusing device and a thermal infrared imager using the same. Specifically disclosed are the following: the manual focusing process is realized by manually adjusting a focusing hand wheel to drive a focusing cam in the lens and further drive the lens to move along the axial direction. The stepping motor is driven to operate by current from the body of the thermal infrared imager main body so as to drive the focusing cam to realize the movement of the lens along the axial direction, and the automatic focusing of the lens is completed. However, in this arrangement, when manual focusing is performed, the manual focusing is completely realized through hardware mechanical transmission in the lens, and there is no relationship with an automatic control part of automatic focusing, so that too many hardware transmission links are formed in the lens, and the volume of the lens is increased. In addition, the load of hardware is large during focusing, so that the focusing is not simple and convenient enough, and the service life of the focusing is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned technical problem, provide an infrared camera lens focusing device who realizes manual/automatic focusing with simple structure.
In order to achieve the above object, the utility model provides an infrared camera lens focusing device, include:
a focus execution unit including a driving motor and a driving mechanism;
a central processing unit electrically connected with the focusing execution unit so as to transmit a focusing instruction from the central processing unit to the focusing execution unit; further comprising:
and the focusing control unit comprises a manual focusing device and an automatic focusing trigger device, wherein the manual focusing device and the automatic focusing trigger device are respectively connected with the central processing unit.
According to an aspect of the present invention, the manual focusing apparatus includes a manual focusing mechanism and a signal converter.
According to an aspect of the invention, the manual focusing mechanism is a rotatable focusing ring, and the signal converter is a potentiometer.
According to one aspect of the present invention, the focus adjusting ring is mechanically and fixedly connected to the potentiometer, and the potentiometer converts a focusing angular displacement of the focus adjusting ring into a focusing electrical signal;
the potentiometer is connected with the central processing unit.
According to the utility model discloses an aspect, focusing execution unit's driving motor is step motor, actuating mechanism is gear drive, wherein, be equipped with drive gear on step motor's the output shaft, actuating mechanism include with step motor exports epaxial drive gear engaged with focusing gear.
In order to achieve the above object, a focusing method of an infrared lens focusing apparatus is provided, which includes:
(1) the manual focusing mode is adopted, so that the focusing device can be used for focusing,
s1, sending a focusing signal A to a central processing unit by adjusting a manual focusing device;
s2, the central processing unit receives the focusing signal A and converts the focusing signal A into a focusing instruction A;
s3, the central processing unit transmits the focusing instruction A to the focusing execution unit to control the focusing execution unit to carry out focusing;
(2) in the automatic focusing mode, the lens is adjusted,
s01, triggering an automatic focusing triggering device to send a focusing signal D to the central processing unit;
s02, the central processing unit converts the focusing signal D into a focusing instruction D;
and S03, the central processing unit transmits the focusing instruction D to the focusing execution unit and controls the focusing execution unit to perform focusing.
According to an aspect of the present invention, the central processing unit transmits the focusing instruction D to the focusing execution unit, controls the focusing execution unit to perform focusing, and further includes:
s031, the central processing unit automatically identifies the imaging definition; wherein,
if the imaging definition reaches a preset condition in the central processing unit, finishing focusing control on the focusing execution unit;
and if the imaging definition deviates from the preset condition in the central processing unit, the central processing unit sends a focusing instruction E to the focusing execution unit again until the definition reaches the preset condition in the central processing unit.
According to one aspect of the present invention, the predetermined condition in the central processing unit is set to a sine curve; wherein peaks in the preset condition represent clearly, and troughs in the preset condition represent fuzziness.
According to an aspect of the present invention, the focusing instruction a, the focusing instruction D, and the focusing instruction E respectively include focusing action information, focusing speed information, and focusing stroke amount information; the focusing action information is used for controlling the motion state of the focusing execution unit, the focusing speed information is used for controlling the motion speed of the focusing execution unit, and the focusing stroke amount information is used for controlling the motion distance of the focusing execution unit.
According to the utility model discloses an aspect, selectively adopt one or two kinds of combinations in manual focusing mode, the automatic focusing mode to focus.
According to the utility model discloses an infrared camera lens focusing device can select manual focusing mode or automatic focusing mode as required in an infrared camera lens. According to the utility model discloses, manual focusing mode and automatic focusing mode adopt and send the focusing signal of telecommunication to central control unit, accomplish the focusing by central control unit control focusing execution unit. When adopting manual focusing, be different from the mode that the focusing control unit directly accomplished the focusing through mechanical transmission drive focusing execution unit among the prior art, according to the utility model discloses a focusing device produces the focusing signal of telecommunication through manual regulation focusing control unit and then drives focusing execution unit through central department unit with the form of the signal of telecommunication and accomplishes the focusing action. When the automatic focusing mode is adopted, the central processing unit directly sends a focusing instruction to the focusing execution unit according to the automatic focusing instruction, and the focusing execution unit is controlled to finish focusing action.
According to the utility model discloses an infrared focusing device, central processing unit and a focusing execution unit of manual focusing mode and automatic focusing mode sharing. Therefore, mechanical parts of a manual focusing part are reduced, and the structure of the focusing device is simplified. Mechanical chain transmission between manual focusing hardware in the prior art is changed into a signal transmission control mode, so that the occupied space is saved, and the volume of the infrared lens is reduced.
According to the utility model discloses an infrared camera lens focusing device to the transmission of focusing signal of telecommunication realizes the control to focusing execution unit, and then accomplishes the focusing process. Compared with mechanical transmission, the transmission of the focusing electric signal simplifies the focusing process, so that the focusing is simpler and more convenient, and meanwhile, the transmission control of the focusing electric signal is more accurate, thereby being beneficial to improving the focusing precision. In addition, the transmission of focusing electric signals saves excessive mechanical chain transmission in the focusing device, does not need to bear too much load during focusing, and has small focusing damping, so that the focusing process is light, fast and flexible.
According to the utility model discloses an infrared camera lens focusing device has two kinds of focusing modes of manual focusing and automatic focusing, can select by oneself according to the focusing environment difference for the focusing is more convenient, and application scope is wider. In addition, the arrangement of the potentiometer and the central processing unit can perfectly correspond the data information of the two focusing modes in a manual focusing mode and an automatic focusing mode, thereby reducing focusing errors, reducing the time for focusing and improving the focusing efficiency.
Drawings
Fig. 1 is a view schematically showing a structural assembly of an infrared lens focusing apparatus according to the present invention;
fig. 2 is a detailed structural view schematically showing an infrared lens focusing apparatus according to the present invention;
fig. 3 is a flow chart schematically illustrating focusing of the infrared lens focusing apparatus according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.
As shown in fig. 1, according to an embodiment of the present invention, an infrared lens focusing apparatus includes a focusing control unit 1, a central processing unit 2, and a focusing execution unit 3. The focusing control unit 1 can generate an electric signal and can transmit the electric signal to the central processing unit 2, the central processing unit 2 processes the electric signal, converts the electric signal into a focusing instruction and transmits the focusing instruction to the focusing execution unit 3, and the focusing execution unit 3 executes a focusing action. In this embodiment, the focusing control unit 1 can generate an electric signal in two ways, i.e. manual focusing and automatic focusing, according to the present invention. The central processing unit 2 is used in both the manual focusing mode and the automatic focusing mode as an associated device of the manual focusing mode and the automatic focusing mode.
As shown in fig. 2, the focus control unit 1 according to the present invention includes a manual focus adjustment device 101 and a focus trigger device 102. The manual focusing device 101 is used in a manual focusing mode, and the focus trigger device 102 is used in an automatic focusing mode. The manual focusing device 101 and the focus trigger device 102 are electrically connected to the central processing unit 2, respectively, and the central processing unit 2, as a device associated with the manual focusing mode and the automatic focusing mode, may receive an electrical signal from the manual focusing device 101 and an electrical signal from the focus trigger device 102.
As shown in fig. 2, the manual focus adjustment apparatus 101 includes a manual focus adjustment mechanism 1011 and a signal converter 1012. In this embodiment, the manual focusing mechanism 1011 is a rotatable focusing ring, and the signal converter 1012 is a potentiometer. The focusing ring and the potentiometer are mechanically and fixedly connected, and when the focusing ring is manually rotated, the potentiometer can be driven to operate. The potentiometer is used as an adjustable electronic component, and can record data such as angular displacement of the focusing ring during rotation, namely the potentiometer can convert the focusing angular displacement of the focusing ring into the change of resistance value in the potentiometer and record the data. In the manual focus mode, the focus control unit 1 is electrically connected to an input terminal of the central processing unit 2 through a potentiometer in the manual focus device 101, and the central processing unit 2 is configured to receive data information from the potentiometer and perform format conversion on the data information.
As shown in fig. 2, the focus trigger means 102 in the focus control unit 1 is electrically connected to an input terminal of the central processing unit 2. In the automatic focusing mode, an Auto Focus trigger button on the Focus trigger device 102 can be manually pressed, the Focus trigger device 102 generates a focusing electric signal according to the acquired image information and transmits the focusing electric signal to the central processing unit 2, and the central processing unit 2 further converts the focusing electric signal into a pulse signal after receiving the focusing electric signal and transmits the pulse signal to the Focus execution unit 3 to execute focusing action.
As shown in fig. 2, the central processing unit 3 controls the same focus execution unit 3 to execute the focus adjustment operation regardless of whether the electric focus adjustment signal received by the central processing unit 2 is from the manual focus adjustment device 101 or the focus trigger device 102. The focus actuator unit 3 includes a drive motor 301 and a drive mechanism 302.
In the present embodiment, the driving motor 301 is a stepping motor, and the driving mechanism 302 is a gear train. The output shaft of the stepping motor is provided with a driving gear, the driving mechanism comprises a focusing gear, and the focusing gear is meshed with the driving gear on the output shaft of the stepping motor. The stepping motor is electrically connected with the output end of the central processing unit 2, so that the central processing unit 2 is electrically connected with the focusing execution unit 3.
In the manual focusing mode or the automatic focusing mode, after the stepping motor receives a pulse signal after format conversion from the central processing unit 2, the stepping motor rotates in a set direction to generate driving force, and the driving gear on the output shaft of the stepping motor drives the focusing gear to operate so as to drive the lens in the infrared lens to move axially to complete focusing.
Adopt and contain the utility model discloses when focusing device's infrared camera lens was shot, the collection work of image was carried out earlier, and infrared camera lens carries out infrared camera lens's focusing process after accomplishing image acquisition. According to the actual shooting environment condition, a manual focusing mode and an automatic focusing mode can be selected to focus the infrared lens.
The focusing method of the infrared lens focusing device according to the present invention is specifically described below with reference to fig. 3:
the focusing process when the manual focusing mode is selected: s1, sending a focusing signal A to a central processing unit 2 by adjusting a manual focusing device 101; s2, the central processing unit 2 receives a focusing signal A and converts the focusing signal A into a focusing instruction A; and S3, the central processing unit transmits the focusing instruction A to the focusing execution unit and controls the focusing execution unit to perform focusing. In the manual focusing mode, after the infrared lens is focused for one time, if the preset focusing standard is not reached, the process of manual focusing needs to be repeated, the focusing ring is continuously adjusted manually for focusing until the preset focusing standard is reached, and then the normal shooting of the image is carried out. If the lens still cannot shoot normally after focusing, on the lens operation interface, the manual focusing mode can be reselected for focusing or the automatic focusing mode can be selected for focusing until the lens can shoot the object normally.
Focusing process when the autofocus mode is selected: s01, the manual trigger automatic focusing trigger device 102 sends a focusing signal D to the central processing unit 2; s02, the central processing unit 2 converts the focusing signal D into a focusing instruction D; and S03, the central processing unit 2 transmits a focusing instruction D to the focusing execution unit 3, and controls the focusing execution unit 3 to perform focusing. In the automatic focusing mode, after the focusing execution unit 3 executes a focusing operation once, the focusing result is fed back to the central processing unit 2, and whether the focusing result meets a predetermined focusing standard, that is, whether the imaging definition at this time meets a predetermined standard is determined. And if the preset focusing standard is reached, continuing to normally shoot the image. If the focusing result does not reach the preset focusing standard, the central processing unit 2 sends a focusing instruction E to the stepping motor again until the focusing result reaches the preset focusing standard, and the image is shot normally.
In the present embodiment, the determination of whether the focusing result meets the predetermined focusing criterion is made by using a sine curve in the central processing unit 2, where the change of the sine curve from the valley to the peak indicates that the image is not clear to clear, and when the curve reaches the peak, the central processing unit 2 automatically recognizes the position as the best clear position, i.e., the best focusing result.
Further, each focusing instruction sent from the central processing unit 2 to the stepping motor as a control source can control whether the stepping motor performs focusing movement, the rate of focusing, and the stroke amount of focusing.
The foregoing is illustrative of specific embodiments of the present invention and reference should be made to the implementation of the apparatus and structures described in detail herein, which are not necessarily exhaustive of the invention.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An infrared lens focusing apparatus, comprising:
a focus execution unit including a driving motor and a driving mechanism;
a central processing unit electrically connected with the focusing execution unit so as to transmit a focusing instruction from the central processing unit to the focusing execution unit; it is characterized by also comprising:
and the focusing control unit comprises a manual focusing device and an automatic focusing trigger device, wherein the manual focusing device and the automatic focusing trigger device are respectively connected with the central processing unit.
2. The infrared lens focusing apparatus of claim 1, wherein the manual focusing apparatus comprises a manual focusing mechanism and a signal converter.
3. An infrared lens focusing apparatus according to claim 2 wherein the manual focusing mechanism is a rotatable focus ring and the signal converter is a potentiometer.
4. The infrared lens focusing device of claim 3, wherein the focusing ring is mechanically and fixedly connected with the potentiometer, and the potentiometer converts the focusing angular displacement of the focusing ring into a focusing electric signal;
the potentiometer is connected with the central processing unit.
5. An infrared lens focusing apparatus according to any one of claims 1 to 4, wherein the driving motor of the focusing actuator is a stepping motor, and the driving mechanism is a gear transmission mechanism, wherein a driving gear is provided on an output shaft of the stepping motor, and the driving mechanism includes a focusing gear engaged with the driving gear on the output shaft of the stepping motor.
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| CN201721205930.6U CN207505001U (en) | 2017-09-20 | 2017-09-20 | Infrared lens focus control |
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| CN201721205930.6U CN207505001U (en) | 2017-09-20 | 2017-09-20 | Infrared lens focus control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107635094A (en) * | 2017-09-20 | 2018-01-26 | 宁波舜宇红外技术有限公司 | Infrared lens focus control and focus adjustment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107635094A (en) * | 2017-09-20 | 2018-01-26 | 宁波舜宇红外技术有限公司 | Infrared lens focus control and focus adjustment method |
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