CN202424872U - Cradle head for finely controling variable-times focussing of bolt shot - Google Patents
Cradle head for finely controling variable-times focussing of bolt shot Download PDFInfo
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- CN202424872U CN202424872U CN2011205387845U CN201120538784U CN202424872U CN 202424872 U CN202424872 U CN 202424872U CN 2011205387845 U CN2011205387845 U CN 2011205387845U CN 201120538784 U CN201120538784 U CN 201120538784U CN 202424872 U CN202424872 U CN 202424872U
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- camera lens
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- lens motor
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- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
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- 239000003990 capacitor Substances 0.000 description 2
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Abstract
The utility model discloses a cradle head for finely controling variable-times focussing of a bolt shot. The cradle head comprises the bolt shot with a shot motor, a driver module used for providing power for the shot motor, and a microprocessor used for sending a control command for the shot motor. An H bridge module is arranged, and the power signal input end of the H bridge module and the power signal output end of the H bridge module are respectively connected with the driver module and the shot motor. An AD module is arranged and used for collecting state parameter of the shot motor, and sending the state parameter to the microprocessor. The microprocessor is provided with a PWM (pulse width modulation) output connector which connected with the signal input end of the H bridge module, and the power signal with the corresponding duty ratio is output to the shot motor by the H bridge module according to the control signal of the PWM output connector. The cradle head can accurately and quick control and preset the variable-times focussing of the shot by closed-loop control of the shot motor.
Description
Technical field
The utility model relates to a kind of The Cloud Terrace gunlock of field of video monitoring, relate in particular to a kind of can be meticulous control gunlock camera lens become the gunlock camera lens of zoom and focus.
Background technology
All be the rotating direction of coming the controls lens motor through the control relay break-make in the control circuit of present most of gunlock camera lens, simple realization becomes doubly and the function that focuses on.
Along with the continuous development of monitoring trade, this effect can not satisfy client's demand gradually and can not in control, realize effectively becoming doubly and the coarse adjustment and the fine adjustment that focus on.Owing to sluggish, reasons such as overshoot can not guarantee in initialization process, to realize becoming doubly and in the process of the speed that focuses on and accuracy and relay adhesive also can producing bigger interference.
The utility model content
The utility model is revised the drive circuit of camera lens motor on hardware; Utilize the H bridge module to drive the camera lens motor; Through the duty ratio of microprocessor controls PWM, reach the purpose of controls lens motor driven voltage, thus the effectively motion of controls lens motor; Realize the function of camera lens coarse adjustment and fine adjustment, make camera lens become zoom and focus and realize controlling fast and accurately and presetting.
A kind of can be meticulous control gunlock camera lens become the The Cloud Terrace of zoom and focus, comprise the gunlock camera lens that has the camera lens motor, be used for to described camera lens motor provide power supply driver module, be used for microprocessor to described camera lens motor sending controling instruction;
Be provided with the H bridge module, the power supply signal input of this H bridge module is connected described driver module and camera lens motor respectively with the power supply signal output;
Be provided with the AD module, be used to gather the state parameter of camera lens motor, and this state parameter is transferred to described microprocessor;
Described microprocessor has the PWM output interface; This PWM output interface is connected to the signal input part of described H bridge module, and the control signal of the PWM output interface of H bridge module basis is exported the power supply signal of corresponding duty ratio to described camera lens motor.
Described H bridge module can basis the control signal of PWM output interface the power supply signal of driver module is converted into the power supply signal with corresponding duty ratio and sense of current and exports described camera lens motor to; To the meticulous control of camera lens motor, promptly realize becoming the meticulous control of zoom and focus.
The H bridge drive circuit that described H bridge module can build for various full-bridges, half-bridge and power tube etc.Exportable artificial adjustable PWM ripple comes the controls lens motor speed of service, thereby can realize it is controlled fast and accurately and presets, and produces the high quality graphic effect that meets user's request.
Described H bridge module can be selected existing BD6220F chip for use, is the speed of service that artificial adjustable lens driving voltage comes the controls lens motor through the artificial controlled PWM ripple of the PWM control mod B mode producing of BD6220F chip.
Described microprocessor can be DSP, ARM, single-chip microcomputer, CPLD, FPGA etc.; Its function is the instruction that receives and judge the communication module transmission; And produce rational control logic according to command adapted thereto the H bridge module is controlled; Promptly the camera lens motor is carried out reasonable drive controlling, gather the AD value of feedback of AD module simultaneously, so that control is revised to the camera lens motor-driven.
Described AD module can carry AD module or independent AD collection IC for microprocessor, in order to carry out camera presets more accurately, recommends the figure place of AD module to be higher than 10.It mainly acts on is to gather camera lens to become doubly and the AD value that focuses on, and feeds back to microprocessor, makes microprocessor can make rational lens driving control logic timely and effectively.
Said driver module can be various linearities or switch power module, and can realize artificial adjustable output through certain method.It mainly acts on is that camera lens for user configured different manufacturers different model provides reliable and stable, and artificial adjustable electric current and voltage, makes the camera lens can normal and stable operation.
As preferably, be provided with the communication module that is used for to described microprocessor input instruction, the Communication Control between the communication module chief leading cadre machine.Described communication module can be various communication chips and photoelectrical coupler; The combination of circuit such as gate circuit; It mainly acts on is the logical order that the control level signal processing that sends over control end becomes to meet microprocessor, makes microprocessor can receive the upper strata instruction fast and accurately and carries out handled.
Have the variable resistor that has corresponding relation with the rotation of described camera lens motor in the described gunlock camera lens, described AD module is gathered the state parameter of this variable-resistance voltage signal as described camera lens motor.Drive this variable resistor during the rotation of camera lens motor and change resistance, its voltage signal also changes thereupon, and gathering this voltage signal just can the corresponding positional information of learning the camera lens motor, the corresponding camera lens change zoom and focus situation of learning.
Driver module produces suitable camera lens motor driven voltage in the utility model The Cloud Terrace, produces the corresponding operating request by communication module, and is transferred to microprocessor.Declare through microprocessor logic that be after the control to camera lens; Produce to reasonably controling of H bridge module and drive the camera lens motor, produce the control ring that drives, meanwhile the AD module begins in real time to becoming doubly and the collection of focal position AD value; And feed back to microprocessor; The feedback loop that produce to drive, thus the closed-loop control of lens driving formed, reached camera lens and become doubly and effective control that focuses on and the effect that accurately presets.The utility model can realize that through the closed-loop control to the camera lens motor camera lens becomes zoom and focus and controls fast and accurately and preset.
Description of drawings
Fig. 1 is the structured flowchart of the utility model The Cloud Terrace (only illustrated and improve relevant part);
Fig. 2 is the circuit diagram of H bridge module in the utility model The Cloud Terrace;
Fig. 3 is the input and output waveform sketch map of the chip BD6220 of H bridge module among Fig. 2 when adopting PWM control B pattern;
Fig. 4 is the equivalent circuit diagram (wherein dotted line is represented the sense of current) of the chip BD6220 among Fig. 3;
Fig. 5 is the equivalent circuit diagram during another kind of state for the chip BD6220 among Fig. 3 is in;
Fig. 6 is the schematic flow sheet that the utility model cradle head control gunlock camera lens becomes zoom and focus.
Embodiment
Referring to Fig. 1; The utility model a kind of can be meticulous control gunlock camera lens become the The Cloud Terrace of zoom and focus, comprise the gunlock camera lens that has the camera lens motor, be used for to the camera lens motor provide power supply driver module, be used for microprocessor to described camera lens motor sending controling instruction.
Be provided with the H bridge module, the power supply signal input of this H bridge module is connected described driver module and camera lens motor respectively with the power supply signal output; Be provided with the AD module, be used to gather the state parameter of camera lens motor, and this state parameter is transferred to described microprocessor microprocessor have the PWM output interface; This PWM output interface is connected to the signal input part of described H bridge module, and the control signal of the PWM output interface of H bridge module basis is exported the power supply signal of corresponding duty ratio to described camera lens motor.
Also be provided with the communication module that is used for to described microprocessor input instruction.The corresponding variable resistor of the rotation of camera lens motor, the AD module is gathered the state parameter of this variable-resistance voltage signal as described camera lens motor.
Referring to Fig. 2; The H bridge module adopts chip BD6220; Be provided with capacitor C 6, capacitor C 7, resistance R 3 and resistance R 4 in the auxiliary circuit of periphery; The port FIN of chip BD6220 and port RIN are connected to microprocessor PWM output interface (can carry the PWM module for microprocessor, also can be the PWM module of software simulation), and port OUT1 and port OUT2 are connected to the camera lens motor.
Chip BD6220 has multiple mode of operation, sees table 1 for details:
Table 1
Referring to Fig. 3～6, when the control of the utility model gunlock camera lens became zoom and focus, host computer sent to after the effective instruction of microprocessor through communication module, and little processing at first can be resolved instruction.When instruction resolves to the camera lens control command, microprocessor at first can start timer internal and confirm a fine setting time range (for example 1～2 second).Within the fine setting time, microprocessor is opened the PWM function and is got into the fine setting pattern, and promptly control port FIN and port RIN make chip BD6220 be in g shown in the table 1 or h state.
Port OUT1 and the pressure reduction between the port OUT2 of this moment is that the duty ratio by PWM determines, and input duty cycle=1-output duty cycle.
So produce the output control logic of high duty ratio through the PWM output port of microprocessor; Produce the output of the low duty ratio of BD6220; Thereby produce the pressure reduction of a low port OUT1 and port OUT2; The driving voltage of promptly exporting an artificial controlled low pressure differential makes motor to carry out Forward and Reverse rotation than low velocity, finely tunes.
Exceed after the fine setting time, microprocessor control chip BD6220 gets into coarse mode, and promptly control port FIN and port RIN make chip BD6220 be in b shown in the table 1 or c state.Pressure reduction between port OUT1 and the port OUT2 is maximum at this moment, and promptly the highest control voltage of output makes motor carry out Forward and Reverse rotation by prestissimo, carries out coarse adjustment.
If the user only wants to finely tune control; So only need be within the fine setting time range sending to the microcontroller camera lens through communication module ceases and desist order and gets final product; Otherwise microcontroller thinks that the user wants to carry out coarse adjustment control; Surpass so after the fine setting time range, microprocessor gets into the coarse adjustment control model automatically.
The user is stored in the change zoom and focus information (AD value) of camera lens in the middle of the Nonvolatile memory reservoir, and the controls lens process of returning the memory location is called camera presets at any time.
Camera presets requires: speed is fast, and the position is accurate.
When instruction resolves to the camera presets order; Microprocessor at first reads current AD value CurZ of camera lens and CurF (being the state parameter of camera lens motor) through the AD module; Camera presets AD value TarZ and TarF in the middle of the reading non-volatile internal memory then; The direction of action that difference RelZ through between the two and RelF judge camera lens is Forward or Reverse, confirms a deceleration threshold value ThZ and ThF simultaneously.When RelZ greater than ThZ or RelF during greater than ThF; Explain that current lens location and camera presets position are far away; Microprocessor control chip BD6220 gets into coarse mode; Whether output maximum voltage controls lens motor rotates to preset position with prestissimo, inquires about the value of the current AD value of camera lens and calculating RelZ and RelF simultaneously in real time, to get into really preset within ThZ and the ThF scope.
When RelZ less than ThZ or RelF the time less than ThF; Explain that lens location is near preset position; This moment, microprocessor control chip BD6220 got into the fine setting pattern; The driving voltage of exporting an artificial controlled low pressure differential makes motor to be rotated than low velocity, and the controls lens motor gets into the decelerating phase.
The explanation camera lens has turned back to preset position when RelZ and RelF are kept to 0, and microprocessor control chip BD6220 stops.Because it is slow to get into fine setting pattern rear motor rotary speed, so can be good at avoiding presetting the image blurring phenomenon of overshoot.
The coarse adjustment process has guaranteed the speed of camera presets, and trim process has guaranteed the accurate of camera presets, controls whole initialization process through both way of combining, has realized high-speed high-precision camera presets, fully satisfies client's demand.
It is emphasized that; The described case study on implementation of the utility model is illustrative; Rather than it is determinate; Therefore the utility model is not limited to the case study on implementation described in the embodiment, every by those skilled in the art according to other execution mode that the technical scheme of the utility model draws, belong to the scope of the utility model protection equally.
Claims (3)
- One kind can be meticulous control gunlock camera lens become the The Cloud Terrace of zoom and focus; Comprise the gunlock camera lens that has the camera lens motor, be used for to described camera lens motor provide power supply driver module, be used for microprocessor to described camera lens motor sending controling instruction, it is characterized in that:Be provided with the H bridge module, the power supply signal input of this H bridge module is connected described driver module and camera lens motor respectively with the power supply signal output;Be provided with the AD module, be used to gather the state parameter of camera lens motor, and this state parameter is transferred to described microprocessor;Described microprocessor has the PWM output interface; This PWM output interface is connected to the signal input part of described H bridge module, and the control signal of the PWM output interface of H bridge module basis is exported the power supply signal of corresponding duty ratio to described camera lens motor.
- 2. as claimed in claim 1 can be meticulous control gunlock camera lens become the The Cloud Terrace of zoom and focus, it is characterized in that: be provided with the communication module that is used for to described microprocessor input instruction.
- 3. as claimed in claim 2 can be meticulous control gunlock camera lens become the The Cloud Terrace of zoom and focus; It is characterized in that: have the variable resistor that has corresponding relation with the rotation of described camera lens motor in the described gunlock camera lens, described AD module is gathered the state parameter of this variable-resistance voltage signal as described camera lens motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387845U CN202424872U (en) | 2011-12-21 | 2011-12-21 | Cradle head for finely controling variable-times focussing of bolt shot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387845U CN202424872U (en) | 2011-12-21 | 2011-12-21 | Cradle head for finely controling variable-times focussing of bolt shot |
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| Publication Number | Publication Date |
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| CN202424872U true CN202424872U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205387845U Expired - Fee Related CN202424872U (en) | 2011-12-21 | 2011-12-21 | Cradle head for finely controling variable-times focussing of bolt shot |
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| CN (1) | CN202424872U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301109A (en) * | 2016-09-20 | 2017-01-04 | 北京旷视科技有限公司 | Circuit for controlling motor and motor control method |
| CN110631473A (en) * | 2019-10-28 | 2019-12-31 | 苏州天准科技股份有限公司 | Manual zoom lens with potentiometer electronic feedback device |
-
2011
- 2011-12-21 CN CN2011205387845U patent/CN202424872U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301109A (en) * | 2016-09-20 | 2017-01-04 | 北京旷视科技有限公司 | Circuit for controlling motor and motor control method |
| CN106301109B (en) * | 2016-09-20 | 2019-06-04 | 徐州旷视数据科技有限公司 | Circuit for controlling motor and motor control method |
| CN110631473A (en) * | 2019-10-28 | 2019-12-31 | 苏州天准科技股份有限公司 | Manual zoom lens with potentiometer electronic feedback device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 300384 in Tianjin Binhai Huayuan Industrial Zone (outer ring) eight Haitai Huake Road No. 6 Patentee after: TIANJIN YAAN TECHNOLOGY CO., LTD. Address before: Ziyuan road 300384 Tianjin Huayuan Industrial Park No. 8 Patentee before: Tianjin Yaan Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20181221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |