CN112422815B - Camera control system and method based on piezoelectric ceramics - Google Patents
Camera control system and method based on piezoelectric ceramics Download PDFInfo
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- CN112422815B CN112422815B CN202011063239.5A CN202011063239A CN112422815B CN 112422815 B CN112422815 B CN 112422815B CN 202011063239 A CN202011063239 A CN 202011063239A CN 112422815 B CN112422815 B CN 112422815B
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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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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67288—Monitoring of warpage, curvature, damage, defects or the like
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
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Abstract
The application discloses a camera control system based on piezoelectric ceramics, which comprises a camera driving controller, a piezoelectric ceramic driver, a camera shooting controller and a camera, wherein the camera driving controller is used for generating an object distance adjusting signal, the object distance adjusting signal is divided into a first path of signal and a second path of signal which are synchronous, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller; the piezoelectric ceramic driver is used for driving piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera; the camera shooting controller is used for generating a camera shooting signal according to the second path of signal and transmitting the camera shooting signal to the camera; the camera is used for shooting according to the camera shooting signal. In addition, the system and the method can improve the shooting definition of the camera.
Description
Technical Field
The application relates to the technical field of industrial control, in particular to a camera control system and method based on piezoelectric ceramics.
Background
In the prior art, a high-speed industrial camera is required to detect the defects of the wafer. The morphology of the detected wafer can be photographed by a high-speed industrial camera, and then the obtained morphology features of the wafer are analyzed to determine whether defects exist.
The control of a high-speed industrial camera in the prior art comprises two parts, wherein the first part drives the high-speed industrial camera to move by controlling the deformation of piezoelectric ceramics so as to adjust the distance (object distance) between the high-speed industrial camera and a wafer to be detected and enable the industrial camera to carry out automatic focusing, and the other part controls the high-speed industrial camera to take pictures according to a specific time sequence through a PLC signal. However, the two parts of control are separated in the traditional technology and can only be synchronized through a clock, but a PLC signal can be blocked, so that uncontrollable delay is generated, and the camera can be missed in the process of moving along with the deformation of the piezoelectric ceramic, so that the problem that the shooting and focusing are not synchronous, and the shot pictures acquired by the camera are not clear exists in the control method of the high-speed industrial camera in the traditional technology.
Disclosure of Invention
In order to solve the problem that the control method of the high-speed industrial camera in the traditional technology is asynchronous in shooting and focusing and further makes the shot picture collected by the camera unclear, the application particularly provides a piezoelectric ceramic-based camera control system capable of improving definition.
A camera control system based on piezoelectric ceramics comprises a camera drive controller, a piezoelectric ceramic driver, a camera shooting controller and a camera;
the camera driving controller is used for generating an object distance adjusting signal, the object distance adjusting signal is divided into a first path of signal and a second path of signal which are synchronous, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller;
the piezoelectric ceramic driver is used for driving piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera;
the camera shooting controller is used for generating a camera shooting signal according to the second path of signal and transmitting the camera shooting signal to the camera;
the camera is used for shooting according to the camera shooting signal.
In one embodiment, the camera shooting controller is configured to generate the camera shooting signal when a rising edge of the second path of signal is detected.
In one embodiment, the camera shooting controller comprises an encoder and a modulator, wherein the encoder is used for generating an original control signal, and the modulator is used for modulating the original control signal and the second path signal into the camera shooting signal.
In one embodiment, the modulator is configured to and the original control signal with the second signal to generate a camera shooting signal.
In one embodiment, the camera shooting controller further comprises an amplifier for amplifying the second path of signal to match the original control signal.
In one embodiment, the camera shooting controller further comprises a delay circuit for delaying the camera shooting signal by a preset time length.
In one embodiment, the camera is used to capture when a rising/falling edge of the camera capture signal is detected.
In one embodiment, the camera is further configured to set shooting parameters according to the signal strength and/or duty ratio of the camera shooting signal, wherein the shooting parameters include at least one of shutter speed and exposure duration.
In one embodiment, the system further includes an X-axis position monitoring module, configured to send a feedback signal to the camera shooting controller when it is detected that the camera moves to a preset position, so that the camera shooting controller generates the camera shooting signal according to the feedback signal.
In one embodiment, the camera shooting signal is a square wave signal, a triangular wave signal or a sinusoidal signal, and the camera shooting signal is a voltage signal or a current signal.
In addition, in order to solve the problem that the control method of the high-speed industrial camera in the traditional technology is asynchronous in shooting and focusing, and further the shot picture collected by the camera is not clear, the application particularly provides a piezoelectric ceramic-based camera control method capable of improving the definition based on the system.
A camera control method based on piezoelectric ceramics comprises the following steps based on the system:
the camera driving controller generates an object distance adjusting signal, and after the object distance adjusting signal is divided into a first path of synchronous signal and a second path of synchronous signal, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller;
the piezoelectric ceramic driver drives piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera;
the camera shooting controller generates a camera shooting signal according to the second path of signal and transmits the camera shooting signal to the camera;
the camera shoots according to the camera shooting signal.
After the camera control system and the camera control method based on the piezoelectric ceramics are adopted, the camera driving controller used for adjusting the object distance of the camera to further realize focusing and the camera shooting controller used for controlling camera shooting realize synchronous control, the rising edge of an object distance adjusting signal generated by the camera driving controller controls the piezoelectric ceramics to deform at the same moment so as to adjust the object distance of the camera, and triggers the camera shooting controller to transmit a camera shooting signal to the camera at the moment so as to control the camera to start shooting, so that the shooting process of the camera is always after the object distance of the camera is adjusted, namely after the focusing of the camera is finished, and the pictures shot by the camera are clearer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a diagram illustrating a camera control system according to the prior art;
FIG. 2 is a schematic diagram of a piezoceramic based camera control system in one embodiment;
FIG. 3 is a timing diagram of an object distance adjustment signal, a first path of signal, a second path of signal, and a camera capture signal in an embodiment;
FIG. 4 is a timing diagram of an object distance adjustment signal, a first path of signal, a second path of signal, and a camera capture signal in an embodiment;
FIG. 5 is a timing diagram of synthesizing camera capture signals from the second path of signals and the original control signals in one embodiment;
FIG. 6 is a waveform diagram of a multi-modal camera shot signal;
FIG. 7 is a schematic diagram of a piezoceramic based camera control system in another embodiment;
FIG. 8 is a flow diagram of a piezo ceramic based camera control method in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, and back, X-axis, and Y-axis … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Industrial camera control system among the conventional art can refer to fig. 1 and show, wherein, the camera setting is on piezoceramics driver, and piezoceramics driver and camera are whole to be set up again on X axle removes the guide rail for thereby the camera can remove along X axle guide rail and scan and shoot the wafer, and piezoceramics driver can produce deformation (micron order) along Y axle direction simultaneously, makes can adjust the object distance between camera and the wafer, according to the imaging formula:
it can be seen that in the case where the focal length f and the distance v of the camera are fixed, the sharpness of the taken picture can also be adjusted by adjusting the object distance u, which is equivalent to focusing.
However, in the conventional technology, the piezo ceramic driver and the camera are controlled separately, as shown in fig. 1, the piezo ceramic driver is controlled by an object distance adjusting signal transmitted by the camera driving controller, and the camera is controlled by a camera shooting signal in the form of a PLC signal transmitted by the camera shooting controller, so that the object distance adjusting signal and the camera shooting signal are likely to be out of synchronization, and when the camera actually shoots, the deformation of the piezo ceramic does not make the object distance between the camera and the wafer in the clearest state, so that the shot picture is not clear enough.
In order to solve the problem that the control method of the high-speed industrial camera in the conventional technology is asynchronous in shooting and focusing, and further the shot picture acquired by the camera is not clear, in this embodiment, a camera control system based on piezoelectric ceramics is especially proposed, as shown in fig. 2, including a camera driving controller 10, a piezoelectric ceramic driver 20, a camera shooting controller 30 and a camera 40, where:
the camera driving controller 10 is configured to generate an object distance adjusting signal S0, where the object distance adjusting signal S0 is divided into a first signal S1 and a second signal S2, the first signal S1 is transmitted to the piezoceramic driver 20, and the second signal S2 is transmitted to the camera shooting controller 30.
The piezoceramic driver 20 is used for driving the piezoceramic to deform according to the first signal S1 so as to adjust the object distance of the camera.
The object distance adjusting signal S0 is a signal for controlling the piezoelectric ceramic driver 20 to adjust the object distance by the camera driving controller 10, and the adjustment mode is that the piezoelectric ceramic driver 20 applies the object distance adjusting signal S0 (or amplifies or reduces the object distance by a certain proportion) to the piezoelectric ceramic therein to generate the inverse piezoelectric effect, so that the piezoelectric ceramic generates deformation along the Y-axis direction, thereby adjusting the object distance between the camera and the object to be shot, and realizing focusing. The object distance adjusting signal S0 may be a high-level voltage signal, where the high-level voltage corresponds to the deformation of the piezoelectric ceramic and thus the object distance adjustment; meanwhile, the rising edge of the object distance adjusting signal S0 is a switching signal for triggering the piezoelectric ceramic to deform, and when the piezoelectric ceramic driver 20 receives the rising edge of the object distance adjusting signal S0, the piezoelectric ceramic starts to deform to adjust the object distance. In other embodiments, the object distance adjusting signal S0 may also be a current signal, which is equivalent to a voltage signal in principle and will not be described herein again.
As can be seen from fig. 2, the first signal S1 and the second signal S2 are two synchronous branch signals that the object distance adjusting signal S0 is divided into two parts, so the timing sequence of the first signal S1 and the second signal S2 is the same as that of the object distance adjusting signal S0. The piezoceramic driver 20 receives the first signal S1, which is equivalent to receiving the object distance adjusting signal S0, and the adjustment of the object distance of the camera by the piezoceramic driver 20 according to the first signal S1 is consistent with the adjustment of the object distance of the camera according to the object distance adjusting signal S0.
The camera shooting controller 30 is configured to generate a camera shooting signal S3 according to the second path signal S2, and transmit the camera shooting signal S3 to the camera 40.
The camera 40 is used for photographing according to the camera photographing signal S3.
The timing of the second path of signal S2 received by the camera shooting controller 30 is also consistent with the object distance adjusting signal S0, that is, at the occurrence time of the rising edge of the object distance adjusting signal S0, the piezoceramic driver 20 receives the rising edge of the first path of signal S1 at the same time, and the camera shooting controller 30 receives the rising edge of the second path of signal S2 at the same time. When the piezoelectric ceramic driver 20 receives the rising edge of the first signal S1, the piezoelectric ceramic starts to deform, so as to adjust the object distance, and then the camera shooting controller 30 transmits the camera shooting signal S3 to the camera when receiving the rising edge of the second signal S2, so as to control the camera to shoot, thereby achieving synchronization of shooting and object distance adjustment.
To achieve this, the camera shooting controller 30 generates the camera shooting signal S3 according to the second path signal S2 in two ways.
The first embodiment is as follows:
in the present embodiment, the camera shooting controller 30 is configured to generate the camera shooting signal S3 when a rising edge of the second path signal S2 is detected.
That is, the second path signal S2 may be used as a switching signal or a trigger signal for the camera photographing controller 30 to transmit the camera photographing signal S3 to the camera. Referring to the signal sequence shown in fig. 3, at time t1, when the camera driving controller 10 starts to control focusing, the object distance adjustment signal S0 generates a rising edge, and accordingly, at time t1, the first path signal S1 and the second path signal S2 also generate a rising edge, the camera shooting controller 30 detects the rising edge of the second path signal S2, determines that the switch signal for transmitting the camera shooting signal S3 to the camera is in a trigger state, and starts to generate and transmit the camera shooting signal S3 to the camera.
Further, since the piezoelectric ceramic driver 20 receives the first path of signal S1, a certain time is required until the piezoelectric ceramic is completely deformed to a state corresponding to a preset object distance position, in order to prevent the camera from being blurred due to shooting when the complete deformation of the camera is completed in the piezoelectric ceramic deformation process, a delay circuit may be disposed in the camera shooting controller 30, and the delay circuit may be configured to delay the camera shooting signal S3 for a preset time.
As shown in fig. 4, after detecting the rising edge of the second path signal S2 at time t1, the camera shooting controller 30 may delay a preset time period (e.g., 50ms), and regenerate and transmit the camera shooting signal S3 to the camera at time t 2. The piezoelectric ceramic is completely deformed within the preset time, so that the camera reaches an ideal object distance, the camera completes focusing at the time of t2, and the camera is controlled to shoot through the camera shooting signal S3, so that a clear shooting picture can be obtained.
Example two:
in the present embodiment, the camera shooting controller 30 includes an encoder for generating the original control signal S4 and a modulator (or synthesizer) for modulating the original control signal S4 and the second path signal S2 into the camera shooting signal S3.
That is, in the present embodiment, the camera shooting controller 30 continuously transmits the camera shooting signal S3 to the camera, the encoder thereof continuously generates the original control signal S4, the modulator modulates the original control signal S4 onto the second path signal S2 to generate the continuous camera shooting signal S3, and since the second path signal S2 is continuously high only after the rising edge, the modulated camera shooting signal S3 also occurs after the rising edge of the second path signal S2 occurs, so that the camera can start shooting after the object distance is adjusted.
Further, the modulator may be configured to and the original control signal S4 with the second signal S2 to generate the camera shooting signal S3, that is:
S3＝S2 AND S4
specifically, referring to fig. 5, in fig. 5, the original control signal S4 is a square wave signal, AND the encoder of the camera shooting controller 30 has started to continuously generate the original control signal S4 before time t1, but since the second path signal S2 is at low level before time t1, the camera shooting signal S3 transmitted to the camera after AND (AND) operation before time t1 is at low level, AND no signal is transmitted, AND the camera does not shoot; after the time t1, the second signal S2 changes to high level, and after the original control signal S4 and the second signal S2 are anded after the time t1, the camera shooting signal S3 is the original control signal S4 itself. This makes the second path signal S2 function as a switch for the original control signal S4, and makes the camera shooting signal S3 change to the original control signal S4 at the moment when the rising edge of the second path signal S2 changes from low level to high level, so as to control the camera to shoot.
Further, in order to match the second path signal S2 with the waveform modulated by the original control signal S4, an amplifier may be provided in the camera shooting controller 30, and the amplifier is used for amplifying the second path signal S2 to match with the original control signal S4. As shown in fig. 5, if the voltage value of the second path signal S2 is too far from the voltage value of the original control signal S4, the modulator cannot determine whether the second path signal S2 is at a low level or a high level after time t1, so that the modulated camera shooting signal S3 has a problem, and if the voltage value of the second path signal S2 is amplified to be the same as the original control signal S4, the problem can be avoided, and the control is more accurate.
Further, in the embodiment, the camera shooting controller 30 may also be provided with a delay circuit, which may be disposed before the second path of signal enters the modulator, or after the modulator generates the camera shooting signal S3, and for the same reason, it may wait for the piezoelectric ceramic to be completely deformed within the preset delay time, and start shooting after the camera reaches the ideal object distance, so as to improve the definition.
The above two embodiments describe examples in which the camera photographing controller 30 generates the camera photographing signal S3 from the second path signal S2 in two ways, but are not limited to any of the above embodiments, and the camera may be used for photographing when a rising/falling edge of the camera photographing signal is detected.
As shown in fig. 6, the camera photographing signal S3 may be a square wave, a sine wave, or a triangular wave. The square wave, sine wave or triangular wave has periodic rising edge or falling edge, and the camera can use the rising edge or falling edge of the camera shooting signal S3 as a switch instruction for triggering the shooting. As shown in fig. 2, since the camera also moves along the X-axis guide rail, a series of pictures of the object along the X-axis track can be taken periodically according to the rising edge or the falling edge, i.e. the object can be scanned, and complete image information of the object along the X-axis direction can be obtained through image synthesis.
Further, the camera shooting controller 30 may encode shooting parameters into the camera shooting signal S3, and for different shooting parameters such as shutter speed, exposure time, etc., the camera shooting controller 30 may encode the shooting parameters into signal parameters such as signal strength (voltage value/current value) or duty ratio of the camera shooting signal S3. For example, if the camera shooting controller 30 desires a larger shutter speed, a larger signal intensity may be set, and both may be quantitatively value-corresponded; if the camera shooting controller 30 desires a shorter exposure time period, a smaller duty ratio may be set. After the camera receives the camera shooting signal S3, the camera obtains the signal parameters such as the signal intensity and/or duty ratio of the camera shooting signal, and analyzes the signal parameters to obtain the quantization values of the corresponding shooting parameters, so as to complete the setting of the shooting parameters of the camera, and thus, the camera shoots the shooting parameters encoded by the camera shooting controller 30.
Also, without being limited to any of the above embodiments, as shown in fig. 7, the present piezoceramic-based camera control system may further include an X-axis position monitoring module 50 for sending a feedback signal S5 to the camera shooting controller 30 when detecting that the camera 40 moves to the preset position, and the camera shooting controller 30 generating a camera shooting signal S3 according to the feedback signal to start/stop the camera 40 shooting.
That is, referring to fig. 7, the camera moves on the X-axis guide rail during the shooting process, and when the camera moves to the X-axis preset position, the X-axis position monitoring module 50 monitors the movement of the camera to the X-axis preset position, at this time, the X-axis position monitoring module 50 sends a feedback signal S5 of the switch to the camera shooting controller 30, and the camera shooting controller 30 can use the feedback signal S5 as a switch command to trigger the start/stop of the transmission of the camera shooting signal S3 to the camera.
In the second embodiment, the X-axis position monitoring module 50 may continuously feed back the feedback signal S5 to the camera shooting controller 30, and input the feedback signal S5 to the modulator, and when it is detected that the camera moves to the preset position P1 on the X-axis rail, a rising edge is generated on the feedback signal S5, so that the feedback signal S5 becomes high; when moving to the preset position P2, a falling edge is generated on the feedback signal S5, so that the feedback signal S5 goes low. Then the camera can shoot in the P1 to P2 position interval.
It should be noted that the X-axis position detection module 50 may be based on an optical sensor, an electrical sensor, or other types of sensors, and is not limited to a specific type.
In order to solve the problem that the control method of the high-speed industrial camera in the conventional technology is asynchronous in shooting and focusing, so that a shot picture acquired by the camera is not clear, in this embodiment, a piezoelectric ceramic-based camera control method is especially provided, and based on the piezoelectric ceramic-based camera control system, as shown in fig. 8, the method includes:
step S101: the camera driving controller generates an object distance adjusting signal, the object distance adjusting signal is divided into a first path of signal and a second path of signal which are synchronous, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller;
step S103: and the piezoelectric ceramic driver drives the piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera.
Step S105: the camera shooting controller generates a camera shooting signal according to the second path of signal and transmits the camera shooting signal to the camera;
step S107: and shooting by the camera according to the camera shooting signal.
After the camera control system and the camera control method based on the piezoelectric ceramics are adopted, the camera driving controller used for adjusting the object distance of the camera to further realize focusing and the camera shooting controller used for controlling camera shooting realize synchronous control, the rising edge of an object distance adjusting signal generated by the camera driving controller controls the piezoelectric ceramics to deform at the same moment so as to adjust the object distance of the camera, and triggers the camera shooting controller to transmit a camera shooting signal to the camera at the moment so as to control the camera to start shooting, so that the shooting process of the camera is always after the object distance of the camera is adjusted, namely after the focusing of the camera is finished, and the pictures shot by the camera are clearer.
The above are only examples of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (9)
1. A camera control system based on piezoelectric ceramics comprises a camera driving controller, a piezoelectric ceramic driver, a camera shooting controller and a camera, and is characterized in that the camera driving controller is used for generating an object distance adjusting signal, the object distance adjusting signal is divided into a first path of signal and a second path of signal which are synchronous, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller;
the piezoelectric ceramic driver is used for driving piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera; the rising edge of the first path of signal is a switching signal for triggering the piezoelectric ceramic to deform;
the camera shooting controller is used for generating a camera shooting signal according to the second path of signal, and when the second path of signal is at a high level, the shooting signal can have a rising edge and a falling edge, and the camera shooting signal is transmitted to the camera; the camera shooting controller also comprises a delay circuit, wherein the delay circuit is used for delaying the camera shooting signal for a preset time;
the camera is used for shooting when the rising edge/falling edge of the camera shooting signal is detected.
2. The piezoceramic-based camera control system according to claim 1, wherein the camera shooting controller is configured to generate the camera shooting signal when a rising edge of the second path of signal is detected.
3. The piezoceramic-based camera control system according to claim 1, wherein the camera shooting controller comprises an encoder for generating a raw control signal and a modulator for modulating the raw control signal and the second signal into the camera shooting signal.
4. The piezoceramic-based camera control system according to claim 3, wherein the modulator is configured to AND the raw control signal with the second signal to generate a camera shooting signal.
5. The piezoceramic-based camera control system according to claim 3, wherein the camera shooting controller further comprises an amplifier for amplifying the second signal to match the original control signal.
6. The piezoceramic-based camera control system according to claim 1, wherein the camera is further configured to set shooting parameters according to signal strength and/or duty cycle of the camera shooting signal, wherein the shooting parameters comprise at least one of shutter speed and exposure duration.
7. The piezoceramic-based camera control system according to claim 1, further comprising an X-axis position monitoring module for sending a feedback signal to the camera shooting controller upon detecting that the camera moves to a preset position, so that the camera shooting controller generates the camera shooting signal according to the feedback signal.
8. The piezoceramic-based camera control system according to claim 1, wherein the camera shooting signal is a square wave signal, a triangular wave signal or a sinusoidal signal, and the camera shooting signal is a voltage signal or a current signal.
9. A piezo-ceramic based camera control method based on the piezo-ceramic based camera control system of any one of the preceding claims 1 to 8, the method comprising:
the camera driving controller generates an object distance adjusting signal, and after the object distance adjusting signal is divided into a first path of synchronous signal and a second path of synchronous signal, the first path of signal is transmitted to the piezoelectric ceramic driver, and the second path of signal is transmitted to the camera shooting controller;
the piezoelectric ceramic driver drives piezoelectric ceramic to deform according to the first path of signal so as to adjust the object distance of the camera; the rising edge of the first path of signal is a switching signal for triggering the piezoelectric ceramic to deform;
the camera shooting controller generates camera shooting signals according to the second path of signals, and when the second path of signals are at a high level, the shooting signals are subjected to rising edge and falling edge, and the camera shooting signals are transmitted to the camera; the camera shooting controller also comprises a delay circuit, and the delay circuit delays the camera shooting signal for a preset time;
the camera shoots upon detecting a rising/falling edge of the camera shooting signal.
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