CN109361876A - Focusing circuit, method and microcirculation imaging device - Google Patents
Focusing circuit, method and microcirculation imaging device Download PDFInfo
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- CN109361876A CN109361876A CN201811590491.4A CN201811590491A CN109361876A CN 109361876 A CN109361876 A CN 109361876A CN 201811590491 A CN201811590491 A CN 201811590491A CN 109361876 A CN109361876 A CN 109361876A
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- focusing
- circuit
- control module
- camera
- terminal device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
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Abstract
The present invention relates to a kind of focusing circuit, method and microcirculation imaging devices, the focusing that control module receiving terminal equipment of focusing is sent controls signal, and focusing control signal is sent to lens control module, lens control module adjusts the control electric signal of liquid lens according to focusing control signal.By adjusting control electric signal, control liquid lens change curvature, to change focal length, realize that the focusing to camera adjusts indirectly；Simultaneously after the completion of focusing, focusing control module can be given to terminal device by sending shooting instruction, complete to acquire defocused microcirculation image-forming information with instruction terminal equipment control camera.Based on this, realization operates conveniently and focusing speed is fast and accurately focused.
Description
Technical field
The present invention relates to optical circuit technical field, more particularly to a kind of focusing circuit, method and microcirculation at
As device.
Background technique
Microcirculation typically refers to the blood circulation between arteriole and venule, is conveying oxygen and nutriment to tissue
Cell and the final link and most important link for transporting carbon dioxide CO2 and metabolite.
Usually microcirculation at human body sublingual mucosa is detected, microcirculation image-forming information is obtained, for observing patient's
Microcirculation situation is, it can be achieved that quickly and easily monitor the microcirculation situation of urgent patient, user can be according to detected
Sublingual Microcirculatory Image judges the state of an illness of patient.Wherein, user is to obtain clearly sublingual Microcirculatory Image to need to focus, i.e.,
Position by camera Focusing mechanism variation object distance and apart, makes made thing imaging clearly.Traditional microcirculation imaging device
It is generally focused indirectly using mechanical focusing or drive motor, this focusing mode is inconvenient and focusing speed is slow.
Summary of the invention
Based on this, it is necessary to generally use mechanical focusing or drive motor to adjust indirectly for traditional microcirculation detection device
Coke, the problem that this focusing mode is inconvenient and focusing speed is slow, provide a kind of focusing circuit, method and microcirculation at
As device.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of focusing circuit, method and microcirculations
Imaging device.
One aspect of the present invention provides a kind of focusing circuit, including focusing control module, lens control module,
Energy supply control module and power module；
The focusing control module includes MCU, debugging download circuit, expansion interface circuit, crystal oscillator oscillating circuit, starting electricity
Road and reset circuit；
The lens control module includes liquid lens control chip, full-bridge circuit, the first amplifying circuit, the second amplification electricity
Road, reference source circuit, output current source circuit and connecting terminal circuit；
The MCU is separately connected the liquid lens control chip, the energy supply control module, debugging downloading electricity
Road, the expansion interface circuit, the crystal oscillator oscillating circuit, the start-up circuit and the reset circuit；The MCU is for connecing
Focusing control signal is received, and focusing control signal is sent to liquid lens control chip；The also transmittable shooting of the MCU
It instructs to the terminal device；Wherein, the microcirculation imaging terminal set can according to the shooting instruction control camera acquisition it is micro-
Recycle image-forming information；
The full-bridge circuit passes through first amplifying circuit respectively and connects the MCU, institute with second amplifying circuit
It states full-bridge circuit and is also respectively connected with the liquid lens control chip and the connecting terminal circuit；Wherein, the connecting terminal
Circuit is also connected with the MCU, and for connecting liquid lens；The liquid lens control chip is separately connected a reference source electricity
Road and the output current source circuit；
The power module is separately connected the MCU, liquid lens control chip and the energy supply control module；Institute
Energy supply control module is stated for connecting the camera.
Further, first amplifying circuit includes first resistor, second resistance and the first transistor；
Described first resistor one end connects the MCU, and the other end connects the base stage of the first transistor；
For accessing high level, the other end connects the collector of the first transistor for described second resistance one end；
For the emitter of the first transistor for being grounded, the collector of the first transistor connects the full-bridge electricity
Road.
Further, second amplifying circuit includes 3rd resistor, the 4th resistance and second transistor；
Described 3rd resistor one end connects the MCU, and the other end connects the base stage of the second transistor；
For accessing high level, the other end connects the collector of the second transistor for described 4th resistance one end；
For the emitter of the second transistor for being grounded, the collector of the second transistor connects the full-bridge electricity
Road.
Further, the full-bridge circuit includes the 5th resistance, the first voltage-stabiliser tube, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third
Metal-oxide-semiconductor and the 4th metal-oxide-semiconductor；
For the first voltage-stabiliser tube anode for being grounded, cathode is separately connected first metal-oxide-semiconductor by the 5th resistance
Source electrode and second metal-oxide-semiconductor source electrode；
The grid of first metal-oxide-semiconductor connects first amplifying circuit, the grid connection of second metal-oxide-semiconductor described the
Two amplifying circuits；The grid of the third metal-oxide-semiconductor connects first amplifying circuit, and the grid of the 4th metal-oxide-semiconductor connects institute
State the second amplifying circuit；The drain electrode of first metal-oxide-semiconductor connects the source electrode of the third metal-oxide-semiconductor, the drain electrode of second metal-oxide-semiconductor
Connect the source electrode of the 4th metal-oxide-semiconductor；
The drain electrode of first metal-oxide-semiconductor and the drain electrode of second metal-oxide-semiconductor are all connected with the connecting terminal circuit；Described
The drain electrode of three metal-oxide-semiconductors and the drain electrode of the 4th metal-oxide-semiconductor are used to be grounded.
Further, the crystal oscillator oscillating circuit includes crystal oscillator, the first starting of oscillation capacitor and the second starting of oscillation capacitor；
Described first starting of oscillation capacitor one end connects MCU, and connects described second starting of oscillation capacitor one end by the crystal oscillator；Its
In, described second starting of oscillation capacitor one end connects MCU；
The first starting of oscillation capacitor other end and the second starting of oscillation capacitor other end are used to be grounded.
Further, the reset circuit includes reset resistor and charging capacitor；
Described reset resistor one end connects the MCU for accessing high level, the other end；
The reset resistor other end is also used to be grounded by the charging capacitor.
It preferably, further include the first frequent flashing control module；Wherein, the first frequent flashing control module is for connecting stroboscopic
Lamp；
The first frequent flashing control module is separately connected the focusing control module and the power module.
It preferably, further include the second frequent flashing control module；
Wherein, the second frequent flashing control module connects the power module, and for being separately connected stroboscopic lamp and described
Camera.
It preferably, further include video recording focusing key and power button；
The MCU is separately connected the video recording focusing key and the power button；
The video recording focusing key, which is used to issue to the MCU to focus, controls signal or video recording control signal, described in triggering
When video recording focusing key, the focusing control signal is issued to the MCU or the video recording controls signal；
The power button is used to issue power control signal, when triggering the power button, the power supply to the MCU
Key issues the power control signal to the MCU.
One aspect of the present invention additionally provides a kind of Atomatic focusing method, applied to above-mentioned focusing circuit, packet
Include step:
Power control signal is generated, and is camera power supply according to the power control signal；
The focusing that receiving terminal apparatus is sent controls signal, and according to the control of the focusing control signal adjustment liquid lens
Electric signal processed；Wherein, the terminal device generates the focusing control letter according to the microcirculation image-forming information that the camera acquires
Number；
It generates shooting instruction and the shooting instruction is sent to terminal device, to indicate the terminal device according to
Shooting instruction controls the camera and acquires microcirculation image-forming information.
Preferably, the shooting instruction includes photographing instruction；
The shooting instruction is simultaneously sent to terminal device by the generation shooting instruction, with indicate the terminal device according to
The shooting instruction controls the process of the camera acquisition microcirculation image-forming information, comprising steps of
It generates photographing instruction and the photographing instruction is sent to terminal device, to indicate the terminal device according to
Photographing instruction controls the camera and shoots microcirculation picture.
Preferably, the shooting instruction includes video recording instruction；
The shooting instruction is simultaneously sent to terminal device by the generation shooting instruction, with indicate the terminal device according to
The shooting instruction controls the process of the camera acquisition microcirculation image-forming information, comprising steps of
It generates video recording instruction and video recording instruction is sent to terminal device, to indicate the terminal device according to
Video recording instruction controls the camera video recording.
Further, the Atomatic focusing method further comprises the steps of:
Whether detection camera acquires microcirculation image-forming information, when the camera acquires microcirculation image-forming information, control frequency
Flashing light stroboscopic.
Further, the Atomatic focusing method further comprises the steps of:
Obtain power down control signal；
Stop the power supply to the camera according to the power down control signal.
Another aspect of the present invention provides a kind of microcirculation imaging device, including above-mentioned focusing circuit, also
Including liquid lens, camera, barrel, stroboscopic lamp and terminal device；
The liquid lens are arranged in parallel in the shooting direction of the camera lens of the camera, are in the camera lens of the camera
On same axis；The barrel is arranged in front of the liquid lens；The stroboscopic lamp is in front of the barrel；The liquid
Somascope head, barrel and stroboscopic lamp are on same axis；The liquid lens are connect with the lens control module, the mirror
Head control module controls the liquid lens focusing；The camera respectively with the energy supply control module and the terminal device
Connection, the camera is for acquiring microcirculation image-forming information；The terminal device is connect with the focusing control module, for
The focusing control module sends focusing control signal or receives the shooting instruction that the focusing control module is sent, and obtains
The microcirculation image-forming information of the camera acquisition.
Further, the terminal device is computer.
Further, the stroboscopic lamp is LED.
Above-mentioned focusing circuit, method and microcirculation imaging device, focusing control module receiving terminal equipment are sent
Focusing control signal, and focusing control signal is sent to lens control module, lens control module controls signal according to focusing
Adjust the control electric signal of liquid lens.By adjusting control electric signal, control liquid lens change curvature, to change coke
Away from realization adjusts the focusing of camera indirectly；Simultaneously after the completion of focusing, focusing control module can by send shooting instruction to
To terminal device, complete to acquire defocused microcirculation image-forming information with instruction terminal equipment control camera.Based on this, behaviour is realized
Make convenient and fast and accurately focuses.
Detailed description of the invention
By being more particularly described for the preferred embodiment of the present invention shown in the drawings, above and other mesh of the invention
, feature and advantage will become more fully apparent.Identical appended drawing reference indicates identical part in all the attached drawings, and does not carve
Meaning draws attached drawing by actual size equal proportion scaling, it is preferred that emphasis is shows the gist of the present invention.
Fig. 1 is the focusing circuit function structure chart of embodiment one；
Fig. 2 is focusing control module circuit diagram；
Fig. 3 is lens control module circuit diagram；
Fig. 4 is power module circuitry figure；
Fig. 5 is interface module circuit figure；
Fig. 6 is video recording focusing key circuit figure；
Fig. 7 is power button circuit diagram；
Fig. 8 is energy supply control module circuit diagram；
Fig. 9 is the focusing circuit function structure chart of embodiment two；
Figure 10 is the focusing circuit function structure chart of embodiment three；
Figure 11 is the Atomatic focusing method flow chart of example IV；
Figure 12 is the Atomatic focusing method flow chart of an embodiment in example IV；
Figure 13 is the Atomatic focusing method flow chart of another embodiment in example IV；
Figure 14 is the microcirculation image device structure schematic diagram of embodiment five.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the application.But the application can realize in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to disclosure of this application.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one
End ", " other end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Embodiment one
Fig. 1 is the focusing circuit function structure chart of embodiment one, as shown in Figure 1, the auto-focusing electricity of embodiment one
Road includes including focusing control module 100, lens control module 101, energy supply control module 102 and power module 103；
Control module 100 of focusing includes MCU, debugging download circuit 200, expansion interface circuit 201, crystal oscillator oscillating circuit
202, start-up circuit 203 and reset circuit 204；
Lens control module 101 includes liquid lens control chip 300, full-bridge circuit 301, the first amplifying circuit 302, the
Two amplifying circuits 303, reference source circuit 304, output current source circuit 305 and connecting terminal circuit 306；
MCU be separately connected liquid lens control chip 300, energy supply control module 102, debugging download circuit 200, extension connect
Mouth circuit 201, crystal oscillator oscillating circuit 202, start-up circuit 203 and reset circuit 204；MCU controls signal for receiving focusing, and
Focusing control signal is sent to liquid lens control chip 300；Shooting instruction also can be transmitted to terminal device in MCU；Wherein, eventually
End equipment can control camera according to shooting instruction and acquire microcirculation image-forming information；
Wherein, the camera output end for control module 100 of focusing unidirectionally is connect with the input terminal of energy supply control module 102, i.e.,
The input terminal of energy supply control module 102 unidirectionally receives data, power supply control from camera output end focusing 100 output end of control module
Module 102 is after the data for receiving focusing control module 100, corresponding control camera work.It is electric in one of the embodiments,
The input terminal of source control module 102 receives focusing control module 100 and instructs from camera output end ON/OFF camera power supply, and according to
ON/OFF camera power supply instruction control camera is worked on power or is powered off.Control module 100 of focusing and lens control module 101 are two-way
Connection.Focusing control signal can be sent to lens control module 101 by focusing control module 100, and receive lens control module
The information of 101 feedbacks.Meanwhile shooting instruction can be sent to terminal device by control module 100 of focusing, with instruction terminal equipment root
Microcirculation image-forming information is acquired according to shooting instruction.Meanwhile terminal device can show camera according to the connection with camera in equipment
Collected microcirculation image-forming information.
Wherein, STM32 series monolithic or 51 series monolithics can be selected in focusing control module 100.It is more excellent as one
Embodiment, focusing control module 100 select STM32F103C8T6 chip.
Wherein, when focusing control module 100 is debugged and downloads program, by debugging download circuit 200, program is completed
Debugging or downloading task；Crystal oscillator oscillating circuit 202 provides clock source and gives focusing control module 100；Reset circuit 204 when powering on
It works；Program, which is run, according to 203 option program Starting mode of program Starting mode start-up circuit, after starting realizes corresponding function
Energy.
Fig. 2 is focusing control module circuit diagram in one of the embodiments, as shown in Fig. 2, debugging download circuit 200
The debugging download circuit 200 of 4 lines is made of the I/O1 of focusing control module 100 mouth, I/O2 mouthfuls, 3.3V, GND and terminals P 1.It is logical
The debugging download circuit 200 of 4 lines is crossed, program debugging and downloading can be carried out to focusing control module 100.
As shown in Fig. 2, I/O3 mouth, I/O 4 mouthful, I/O5 mouthful and end of the expansion interface circuit 201 by focusing control module 100
Sub- P2 composition, each I/O port can be used for PWM output, AD acquisition and some normal I/O port operations, increase other function for circuit device
It can do reserved.
As shown in Fig. 2, the both ends of I/O6 mouthfuls and I/O7 mouthfuls of focusing 100 crystal oscillator pin of control module, parallel connection access crystal oscillator Y1,
Then the first starting of oscillation capacitor C1, the second starting of oscillation capacitor C2 being coupled with crystal oscillator both ends again, C1, C2 other end are being connected to ground, this
Sample just constitutes a crystal oscillator oscillating circuit 202, provides a fixed clock source to focusing control module 100.
As shown in Fig. 2, start-up circuit 203 is made of start-up resistor R1 and start-up resistor R2, resistance R1, R2 are respectively connected to list
I/O8, I/O9 foot of piece machine, another foot ground connection.There are three types of the Starting mode for control module 100 of focusing, and passes through I/O8, I/O9 foot
It is configured.When mode 1:I/O8=0 or 1, I/O9=0, focusing control module 100 starts from user's flash memories,
This is also the Starting mode that we select.When mode 2:I/O8=0, I/O9=1, focusing control module 100 is from system storage
Started, is downloaded for serial ports.When mode 3:I/O8=1, I/O9=1, focusing control module 100 is started from SRAM,
For debugging code in sram.
As shown in Fig. 2, reset circuit 204 is made of reset resistor R3, charging capacitor C3, reset resistor R3 accesses 3.3v electricity
Source, another foot and charging capacitor C3 access the I/O10 mouth of focusing control module 100, another foot ground connection of charging capacitor C3 simultaneously.When
It focuses 100 powered on moment of control module, the current potential phase on the both sides charging capacitor C3 can be made since charging capacitor C3 voltage cannot be mutated
Together, RST is low level at this time, and power supply charges to charging capacitor C3 by reset resistor R3 as time goes by later, fully charged
Be RST be high level.Working normally is high level, and low level resets.
Wherein, by taking MCU is STM32F103C8T6 chip as an example.I/O1 mouthfuls are SWCLK pin, and I/O2 mouthfuls are SWIO pin,
I/O3 mouthfuls are PA2 pin, and I/O4 mouthfuls are PA3 pin, and I/O5 mouthfuls are PA4 pin, and I/O6 mouthfuls are OSC_P pin, and I/O7 mouthfuls are
OSC_N pin, I/O8 mouthfuls are BOOT1 pin, and I/O9 mouthfuls are BOOT0 pin, and I/O10 mouthfuls are NRST pin.
Full-bridge circuit 301 connects MCU, full-bridge circuit by the first amplifying circuit 302 and the second amplifying circuit 303 respectively
301 are also respectively connected with liquid lens control chip 300 and connecting terminal circuit 306；Wherein, connecting terminal circuit 306 is also connected with
MCU, and for connecting liquid lens；Liquid lens control chip 300 is separately connected reference source circuit 304 and output current source electricity
Road 305；
Lens control module 101 is used for the control electric signal according to focusing control signal adjustment liquid lens.
Wherein, focusing control module 100 is bi-directionally connected with lens control module 101, and focusing control module 100 is sent
Focusing control signal controls liquid lens to lens control module 101, the adjustment control electric signal of lens control module 101
Realize focusing.Focusing control module 100 sends reading order in one of the embodiments, and lens control module 101 returns to phase
The information answered.Wherein, control electric signal includes the output electric current of liquid lens.
Fig. 3 is lens control module circuit diagram, as shown in figure 3, the first amplifying circuit 302 is by first resistor R4, the second electricity
R5 and the first transistor Q1 composition is hindered, the signal of the 3.3V for control module 100 of focusing is converted to the signal A1 of 5V by it, to control
Full-bridge circuit 301 processed.When the signal for control module 100 of focusing is high level (3.3V), the first transistor Q1 conducting, A1 output
Low level (0V)；When the signal for control module 100 of focusing is low level (0V), the first transistor Q1 cut-off, the high electricity of A1 output
Flat (5V).By taking MCU is STM32F103C8T6 chip as an example, the GATA_A1 mouth output signal of STM32F103C8T6 chip.
As shown in figure 3, the second amplifying circuit 303 is made of 3rd resistor R6, the 4th resistance R7 and second transistor Q2, it
The signal of the 3.3V for control module 100 of focusing is converted into the signal A2 of 5V, to control full-bridge circuit 301.When focusing controls
When the signal of module 100 is high level (3.3V), second transistor Q2 conducting, A2 exports low level (0V)；When focusing controls mould
When the signal of block 100 is low level (0V), second transistor Q2 cut-off, A2 exports high level (5V).It is with MCU
For STM32F103C8T6 chip, the GATA_A2 mouth output signal of STM32F103C8T6 chip.
As shown in figure 3, full-bridge circuit 301 is by the 5th resistance R8, the first voltage-stabiliser tube D1 and the first metal-oxide-semiconductor Q3, the second metal-oxide-semiconductor
Q4, third metal-oxide-semiconductor Q5, the four or three metal-oxide-semiconductor Q6 composition.FB is the input power of full-bridge circuit 301, defeated by crossing A1, A2 control
The polarity switching of outlet OUT_A1 and output end OUT_A2.First voltage-stabiliser tube D1 is for preventing the voltage on FB circuit to be more than
5.6V, as protection component.Wherein, the 5th resistance R8 is 0 Ω resistance, for circuit welding debugging.With lens control module
101 select for ADN8810 chip, and FB circuit is the FB foot of ADN8810 chip.
As shown in figure 3, reference source circuit 304 is made of power supply chip U3, filter resistance R9, the first filter capacitor C4, it will
5v is converted to 4.096V and is given to liquid lens control chip.Wherein, filter resistance R9 and filter capacitor C4 forms RC filter circuit.
By taking lens control module 101 selects ADN8810 chip as an example, the REF foot of ADN8810 chip connects reference source circuit 304.
As shown in figure 3, output current source circuit 305 is filtered by the first output resistance R10, the second output resistance R11 and first
Wave capacitor C5 composition.When selecting the output of 5V current source, the first output resistance R10 is welded；When selecting the output of 3.3V current source,
Second output welding kesistance R11；The output of the first output resistance R10 and second R11 cannot be welded or not welded simultaneously simultaneously.First
Filter capacitor C5 plays the role of filtering.By taking lens control module 101 selects ADN8810 chip as an example, ADN8810 chip
PVDD foot connects output current source circuit 305.
As shown in figure 3, connecting terminal circuit 306 is by the first input resistance R12, the second input resistance R13 and 6pin spacing
It is formed for the FPC terminal of 1.0mm.Output end OUT_A1 and output end OUT_A2 control liquid lens focal length variations, PC13 and
PC14 forms IIC and communicates pin, and liquid lens inner parameter can be read.By taking MCU is STM32F103C8T6 chip as an example,
PC13 foot, the PC14 foot of STM32F103C8T6 chip connect connecting terminal circuit 306.
Power module 103 is separately connected MCU, liquid lens control chip 300 and energy supply control module 102；Power supply control
Module 102 is for connecting camera.
Wherein, power module 103 is used to be controlled according to the energy storage of itself to MCU, liquid lens control chip 300 and power supply
Module 102 is powered, or according to external power supply be MCU, liquid lens control chip 300 and energy supply control module 102 and power.
Meanwhile MCU can by the connection with energy supply control module 102, control energy supply control module 102 be camera power or
Power-off.Wherein, energy supply control module 102 can provide power supply according to the power supply of power module 103 for camera.
Fig. 4 is power module circuitry figure, as shown in figure 4, power module 103 is by PTC self-recovery fuse FU1, the first electricity
Source filter capacitor C6, second source filter capacitor C7, third power filtering capacitor C8, the 4th power filtering capacitor C9 and voltage turn
Change chip composition.Power supply input 5V give PTC self- recoverage type fuse FU1, exports VCC power supply (voltage value 5V), VCC power supply
3.3V is converted by voltage conversion chip U4 and makees power supply and pressure stabilizing, and self- recoverage type fuse FU1 realizes the protection to circuit, prevents
Only overheat and overcurrent.First power filtering capacitor C6, second source filter capacitor C7, third power filtering capacitor C8, the 4th electricity
Source filter capacitor C9 is filtered power supply.
Fig. 5 is interface module circuit figure in one of the embodiments, as shown in figure 5, focusing circuit further includes interface mould
Block；
Focusing control module 100 is used to connect terminal device by interface module.
Wherein, focusing control module 100 passes through the control signal of interface module receiving terminal apparatus, i.e. focusing control module
100 by realizing data interaction between interface module and terminal device.
Interface module selects USB2.0 module in one of the embodiments,.
In one of the embodiments, as shown in figure 5, interface module connects power module 103；Wherein, power module 103
For obtaining the power supply of external power supply according to interface module.
As shown in figure 5, interface module is by D_N, D_ so that control module 100 of focusing selects STM32F103C8T6 chip as an example
P mouthfuls, VCC, GND, the first control resistance R25, the second control resistance R26, pull-up resistor R27 and P1 terminal composition.Pull-up resistor
R27 is in order to facilitate computer equipment identification.By interface module, the communication for realizing terminal device between control module 100 of focusing.
It in one of the embodiments, further include video recording focusing key and power button；
MCU is separately connected video recording focusing key and power button；
Video recording focusing key is used to issue focusing control signal or video recording control signal to MCU；
Wherein, MCU obtains the source of focusing control signal, and in addition to terminal device, user can be pressed by triggering video recording focusing
Key issues focusing control signal to MCU.Focusing control signal is sent to liquid lens control chip by MCU, so that liquid lens
Control chip is focused according to focusing control signal control liquid lens.Wherein, user also can trigger video recording focusing key to
MCU issues video recording control signal, so that MCU control camera starts or stops video recording.
Fig. 6 is video recording focusing key circuit figure, as shown in fig. 6, by taking MCU selects STM32F103C8T6 chip as an example, video recording
Focusing key is made of VCC, GND, PB0, PB1, PA7 and terminal J3.PB0, PB1 can be used as common input interface, receive it is high,
Low level realizes logic focusing；PB0, PB1 also can be used as AD acquisition, change to external devices such as thin film piezoresitive, potentiometers
Amount is judged, to realize focusing.PA7 can be used as common I/O port and also be used as AD acquisition, be used to similar to PB0, PB1 interface
As the I/O port of video recording focusing key.
Power button is used to issue power control signal to MCU；
Wherein, after user triggers power button, power button issues power control signal to MCU, and MCU, which controls power supply, to be believed
Number it is sent to energy supply control module 102, so that energy supply control module 102 is that camera is powered or disconnected and supplies according to power control signal
Electricity.
Fig. 7 is power button circuit diagram, as shown in fig. 7, power button is by source resistance R28, power capacitor C10 and key
S1 composition, power capacitor C10 have the function of filtering, disappear and tremble, and long-pressing power button S1 can be realized to camera, liquid lens and frequency
The on-off line operation of flashing light.By taking MCU selects STM32F103C8T6 chip as an example, the PB3 pin of STM32F103C8T6 chip is connected
Power button module.
Fig. 8 is energy supply control module circuit diagram in one of the embodiments, as shown in figure 8, energy supply control module 102
By the first amplification resistance R21, the second amplification resistance R22 and third transistor Q9 the level-one amplifying circuit formed and by the second amplification
Resistance R23, amplification inductance L1 and the 5th metal-oxide-semiconductor Q10 composition second amplifying circuit and by instruction resistance R24 and LED light D2 group
At power indicating circuit constitute.Level-one amplifying circuit realizes the function to 3.3V control signal conversion 5v signal, second level amplification
Circuit realizes the control function to camera power supply.
Above-mentioned focusing circuit, the focusing that focusing 100 receiving terminal equipment of control module is sent controls signal, and will adjust
Coke control signal is sent to lens control module 101, and lens control module 101 is according to focusing control signal adjustment liquid lens
Control electric signal.By adjusting control electric signal, control liquid lens change curvature, so that changing focal length realizes focusing, indirectly
Realize that the focusing to camera adjusts；Simultaneously after the completion of focusing, focusing control module 100 can be given to end by sending shooting instruction
End equipment is completed to acquire defocused microcirculation image-forming information with instruction terminal equipment control camera.Based on this, operation is realized just
Sharp and focusing speed is fast and accurately focused.
Embodiment two
Fig. 9 is the focusing circuit function structure chart of embodiment two, as shown in figure 9, the auto-focusing electricity of embodiment two
Road further includes the first frequent flashing control module 400；Wherein, the first frequent flashing control module 400 is for connecting stroboscopic lamp；
First frequent flashing control module 400 is separately connected focusing control module 100 and power module 103.
Wherein, the first frequent flashing control module 400 connection focusing control module 100, i.e. connection MCU carry out micro- follow in camera
When ring image-forming information acquires, focusing control module 100 can control stroboscopic lamp stroboscopic by the first frequent flashing control module 400, complete
Camera shoots stroboscopic synchronous with stroboscopic lamp.First frequent flashing control module 400 connects power module 103, from power module 103
It is powered.
Wherein, as shown in figure 9, the first frequent flashing control module 400 by the first stroboscopic resistance R14, the second stroboscopic resistance R15,
Third stroboscopic resistance R16, the 4th stroboscopic resistance R17 and the 4th transistor Q7 and connecting terminal J1 composition, wherein the first stroboscopic electricity
The one end R14 connection focusing control module 100 is hindered, the first frequent flashing control module 400 can amplify the control of focusing control module 100
Signal output signal when output pwm signal, can be achieved with the stroboscopic of stroboscopic lamp, reduce stroboscopic lamp power, reduce the fever of lamp
Amount.
Wherein, the first frequent flashing control module 400 is also connected with power button；User can make stroboscopic by triggering power button
Lamp works on power.
Embodiment three
Figure 10 is the focusing circuit function structure chart of embodiment three, as shown in Figure 10, the auto-focusing of embodiment three
Circuit further includes the second frequent flashing control module 500；Wherein, the second frequent flashing control module 500 connects power module 103, and is used for
It is separately connected stroboscopic lamp and camera.
Wherein, the camera output terminal of the second frequent flashing control module 500 connection camera carries out microcirculation imaging letter in camera
When breath acquisition, camera can control stroboscopic lamp stroboscopic by the second frequent flashing control module 500, and the shooting of completion camera is same with stroboscopic lamp
Cadence is dodged.Second frequent flashing control module 500 connects power module 103, is powered from power module 103.
Wherein, as shown in Figure 10, the second frequent flashing control module 500 by the 5th stroboscopic resistance R18, the 6th stroboscopic resistance R19,
7th stroboscopic resistance R20 and the 5th transistor Q8 and connecting terminal P1 and J2 composition, wherein the one end R18 connects camera output end
Son, the second frequent flashing control module 500 can be able to achieve the stroboscopic of stroboscopic lamp in camera output pwm signal, reduce stroboscopic lamp function
Rate reduces the calorific value of lamp.
Example IV
Figure 11 is the Atomatic focusing method flow chart of example IV, wherein the Atomatic focusing method of example IV is applied to
Such as the focusing circuit of above-mentioned any embodiment, including step S100 to S102:
S100 generates power control signal, and is camera power supply according to power control signal；
Wherein, it can be triggered by receiving terminal equipment or user and generate power control signal.In one of the embodiments,
Power control signal is generated after user presses power button, and according to power control signal, between turn-on power module and camera
Power supply circuit, for camera power.
S101, the focusing that receiving terminal apparatus is sent control signal, and according to focusing control signal adjustment liquid lens
Control electric signal；Wherein, terminal device generates focusing control signal according to the microcirculation image-forming information that camera acquires；
Wherein, the control electric signal of liquid lens is adjusted, can control the curvature for changing liquid lens, thus change focal length,
Realize that the focusing to camera adjusts indirectly.Meanwhile when adjusting the focal length of camera, terminal device can obtain in real time camera and collect
Microcirculation image-forming information, and according to microcirculation image-forming information processing technique generate focusing control signal, be sent to auto-focusing
Circuit, further to adjust the focal length of camera.
S102 is generated shooting instruction and shooting instruction is sent to terminal device, referred to instruction terminal equipment according to shooting
Control camera is enabled to acquire microcirculation image-forming information.
Wherein, shooting instruction can be generated according to external trigger or program setting, external trigger includes that user triggers video recording tune
Burnt key, program triggering include automatically generating shooting instruction after completing to the focusing of liquid lens, and shooting instruction is sent
To terminal device, terminal device can control camera according to shooting instruction and carry out the acquisition of microcirculation image-forming information.
Wherein, camera can be used for shooting microcirculation picture or constantly video shooting, correspondingly, shooting instruction includes taking pictures
Instruction and video recording instruction.
Figure 12 is the Atomatic focusing method flow chart of an embodiment in example IV in one of the embodiments, such as
Shown in Figure 12, generated in step S102 and shooting instruction and shooting instruction be sent to terminal device, with instruction terminal equipment according to
Shooting instruction controls the process of camera shooting, wherein shooting instruction is photographing instruction, this process specifically includes step S200:
S200 generates photographing instruction and photographing instruction is sent to terminal device, is referred to instruction terminal equipment according to taking pictures
Control camera is enabled to shoot microcirculation picture.
For terminal device when receiving photographing instruction, control camera shoots microcirculation picture, i.e., only carries out one or more
The shooting action of moment.
Figure 13 is the Atomatic focusing method flow chart of another embodiment in example IV in one of the embodiments,
As shown in figure 13, shooting instruction is generated in step S102 and shooting instruction is sent to terminal device, with instruction terminal equipment root
According to the process of shooting instruction control camera shooting, wherein shooting instruction is video recording instruction, this process specifically includes step
S300:
S300 is generated video recording instruction and video recording instruction is sent to terminal device, referred to instruction terminal equipment according to video recording
Enable control camera video recording；
Corresponding, for terminal device when receiving video recording instruction, it is dynamic to carry out lasting video shooting for control camera video recording
Make, collects microcirculation image-forming information.
The Atomatic focusing method of example IV further comprises the steps of: in one of the embodiments,
Whether detection camera carries out microcirculation image-forming information acquisition, when the camera acquires microcirculation image-forming information, control
Stroboscopic lamp stroboscopic processed；
When terminal device control camera carries out microcirculation information collection, detect that camera just carries out microcirculation image-forming information
Acquisition is adopted at this point, control stroboscopic lamp stroboscopic, i.e., sending shooting instruction to terminal device with instruction terminal equipment control camera
While collecting microcirculation image-forming information, stroboscopic lamp stroboscopic is controlled.Based on this, the synchronous stroboscopic that stroboscopic lamp is shot with camera is realized.
Embodiment five
Figure 14 is the microcirculation image device structure schematic diagram of embodiment five, as shown in figure 14, the microcirculation of embodiment five
Imaging device includes the focusing circuit of any of the above-described embodiment, further include liquid lens 600, camera 601, barrel 602,
Stroboscopic lamp 603 and terminal device；
Liquid lens 600 are arranged in parallel in the shooting direction of the camera lens of camera 601, are in same with the camera lens of camera 601
On one axis；The setting of barrel 602 is in 600 front of liquid lens；Stroboscopic lamp 603 is in 602 front of barrel；Liquid lens 600,
Barrel 601 and stroboscopic lamp 603 are on same axis；Liquid lens 600 are connect with lens control module 101, lens control
Module 101 controls liquid lens 600 and focuses；Camera 601 is connect with energy supply control module 102 and terminal device respectively, camera
601 for acquiring microcirculation imaging；Terminal device is connect with focusing control module 100, is adjusted for sending to burnt control module 100
Coke control signal, or receive focusing control module 100 send shooting instruction, and obtain camera 601 acquire microcirculation at
As information.
Wherein, barrel 602, which is arranged in front of liquid lens 600, refers to that the shooting of liquid lens 600 is arranged in barrel 602
Direction, stroboscopic lamp 603 the front of barrel 602 similarly.
Terminal device is computer in one of the embodiments,.Computer, will by the interaction with focusing circuit
Focusing control signal is sent to focusing circuit, controls liquid lens 600 by focusing circuit and realizes focusing.Meanwhile
Terminal device can control camera 601 to complete shooting.
Stroboscopic lamp is LED in one of the embodiments,.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.Those of ordinary skill in the art will appreciate that realizing above-described embodiment side
All or part of the steps in method is that the program that relevant hardware can be instructed to complete by program can store in a meter
In calculation machine read/write memory medium, which when being executed, includes the steps that the storage medium of above method, such as: ROM/RAM,
Magnetic disk, CD etc..
Above embodiments only express the several embodiments of the application, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection scope of the application.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of focusing circuit, which is characterized in that including the control module, lens control module, energy supply control module of focusing
And power module；
The focusing control module include MCU, debugging download circuit, expansion interface circuit, crystal oscillator oscillating circuit, start-up circuit and
Reset circuit；
The lens control module include liquid lens control chip, full-bridge circuit, the first amplifying circuit, the second amplifying circuit,
Reference source circuit, output current source circuit and connecting terminal circuit；
The MCU is separately connected liquid lens the control chip, the energy supply control module, the debugging download circuit, institute
State expansion interface circuit, the crystal oscillator oscillating circuit, the start-up circuit and the reset circuit；The MCU is adjusted for receiving
Coke control signal, and focusing control signal is sent to liquid lens control chip；The also transmittable shooting instruction of the MCU
To the terminal device；Wherein, the terminal device can control camera according to the shooting instruction and acquire microcirculation image-forming information；
The full-bridge circuit passes through first amplifying circuit respectively and connects the MCU with second amplifying circuit, described complete
Bridge circuit is also respectively connected with the liquid lens control chip and the connecting terminal circuit；Wherein, the connecting terminal circuit
It is also connected with the MCU, and for connecting liquid lens；Liquid lens control chip be separately connected the reference source circuit and
The output current source circuit；
The power module is separately connected the MCU, liquid lens control chip and the energy supply control module；The electricity
Source control module is for connecting the camera.
2. focusing circuit according to claim 1, which is characterized in that further include the first frequent flashing control module；Wherein, described
First frequent flashing control module is for connecting stroboscopic lamp；
The first frequent flashing control module is separately connected the focusing control module and the power module.
3. focusing circuit according to claim 1, which is characterized in that further include the second frequent flashing control module；
Wherein, the second frequent flashing control module connects the power module, and for being separately connected stroboscopic lamp and the camera.
4. according to claim 1 to focusing circuit described in 3 any one, which is characterized in that further include video recording focusing by
Key and power button；
The MCU is separately connected the video recording focusing key and the power button；
The video recording focusing key is used to issue focusing control signal or video recording control signal to the MCU；
The power button is used to issue power control signal to the MCU.
5. a kind of Atomatic focusing method, applied to the focusing circuit as described in Claims 1-4, which is characterized in that including
Step:
Power control signal is generated, and is camera power supply according to the power control signal；
The focusing that receiving terminal apparatus is sent controls signal, and according to the control electricity of the focusing control signal adjustment liquid lens
Signal；Wherein, the terminal device generates the focusing according to the microcirculation image-forming information that the camera acquires and controls signal；
It generates shooting instruction and the shooting instruction is sent to terminal device, to indicate the terminal device according to the shooting
Instruction controls the camera and acquires microcirculation image-forming information.
6. Atomatic focusing method according to claim 5, which is characterized in that the shooting instruction includes photographing instruction；
The shooting instruction is simultaneously sent to terminal device by the generation shooting instruction, to indicate the terminal device according to
Shooting instruction controls the process of the camera acquisition microcirculation image-forming information, comprising steps of
It generates photographing instruction and the photographing instruction is sent to terminal device, to indicate that the terminal device is taken pictures according to
Instruction controls the camera and shoots microcirculation picture.
7. Atomatic focusing method according to claim 5, which is characterized in that the shooting instruction includes video recording instruction；
The shooting instruction is simultaneously sent to terminal device by the generation shooting instruction, to indicate the terminal device according to
Shooting instruction controls the process of the camera acquisition microcirculation image-forming information, comprising steps of
It generates video recording instruction and video recording instruction is sent to terminal device, to indicate the terminal device according to the video recording
Instruction controls the camera video recording.
8. Atomatic focusing method according to claim 5, which is characterized in that further comprise the steps of:
Whether detection camera acquires microcirculation image-forming information, when the camera acquires microcirculation image-forming information, controls stroboscopic lamp
Stroboscopic.
9. Atomatic focusing method according to claim 5, which is characterized in that further comprise the steps of:
Obtain power down control signal；
Stop the power supply to the camera according to the power down control signal.
10. a kind of microcirculation imaging device, which is characterized in that including the auto-focusing as described in Claims 1-4 any one
Circuit further includes liquid lens, camera, barrel, stroboscopic lamp and terminal device；
The liquid lens are arranged in parallel in the shooting direction of the camera lens of the camera, are in same with the camera lens of the camera
On axis；The barrel is arranged in front of the liquid lens；The stroboscopic lamp is in front of the barrel；The liquid mirror
Head, barrel and stroboscopic lamp are on same axis；The liquid lens are connect with the lens control module, the camera lens control
Molding block controls the liquid lens focusing；The camera connects with the energy supply control module and the terminal device respectively
It connects, the camera is for acquiring microcirculation image-forming information；The terminal device is connect with the focusing control module, is used for institute
It states focusing control module to send focusing control signal or receive the shooting instruction that the focusing control module is sent, and obtains institute
State the microcirculation image-forming information of camera acquisition.
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| CN201811590491.4A CN109361876B (en) | 2018-12-20 | 2018-12-20 | Automatic focusing circuit and method and microcirculation imaging device |
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| CN201811590491.4A CN109361876B (en) | 2018-12-20 | 2018-12-20 | Automatic focusing circuit and method and microcirculation imaging device |
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