CN114826415A - Spiral driving signal modulation device and method and imaging system - Google Patents
Spiral driving signal modulation device and method and imaging system Download PDFInfo
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Abstract
The application relates to a spiral driving signal modulation device and method, imaging system, the spiral driving signal modulation device includes: the acquisition module is used for acquiring an original signal and a modulation parameter; and the modulation module is used for performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment. So, regard first axle drive signal and second axle drive signal as the binary channels sinusoidal drive signal of scanner, under binary channels sinusoidal drive signal's effect, the scanning stage of scanner can divide into forward scanning stage and reverse scanning stage, and two scanning stages are all imageable, and modulation parameter adjusts portably, and can effectively improve limit imaging frame rate.
Description
Technical Field
The application relates to the technical field of optical imaging, in particular to a spiral driving signal modulation device and method and an imaging system.
Background
A multi-photon fluorescence endoscope based on the optical fiber scanning imaging driven by a piezoelectric ceramic tube needs to apply a two-axis alternating current modulation signal to a piezoelectric ceramic scanner so as to drive an optical fiber to realize scanning of a certain area in a two-dimensional plane. Common scanning schemes include helical scanning, grid scanning, and lissajous scanning, while helical scanning is more suitable for piezo-ceramic tube scanning fiber optic endoscopic devices than lissajous and grid scanning.
In the related art, the modulation mode of the driving signal for helical track scanning is mostly slope amplitude modulation, the scanning under the driving signal is divided into a scanning imaging stage and a damping resetting stage, and the damping resetting stage is that the optical fiber needs to be reset through a reverse damping signal after the scanning is completed. However, the generation of the fiber driving signal during the reset process is complicated, and imaging cannot be performed during the reset phase, which results in a low limit imaging frame rate.
Disclosure of Invention
In view of this, the present application aims to overcome the technical problems of the prior art that the generation of the driving signal for the helical track scanning is complex and the limiting imaging frame rate is low, and provides a helical driving signal modulation apparatus and method, and an imaging system.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a first aspect of the present application provides a helical drive signal modulation apparatus comprising:
the acquisition module is used for acquiring an original signal and a modulation parameter;
and the modulation module is used for performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment.
Optionally, when performing signal allocation and sinusoidal parameter adjustment on the original signal according to the modulation parameter, the modulation module is configured to:
substituting the original signal and the modulation parameter into a preset formula to calculate and obtain the first shaft driving signal and the second shaft driving signal; the preset formula comprises:
in the formula, V x And V y Respectively said first axis drive signal and said second axis drive signal, A x Is an amplitude parameter of the first axis drive signal, A y Is the amplitude parameter of the second axis driving signal, f is the vibration frequency parameter of the driving optical fiber, t is the oscillation time of the original signal, N is the number of scanning turns in the single image, omega 0 Is a phase difference parameter.
Optionally, the modulation parameters include: an amplitude parameter, a frequency parameter, and a phase difference parameter; the modulation module comprises a frequency adjustment submodule, a phase difference adjustment submodule, a first axis sine wave amplitude adjustment submodule and a second axis sine wave amplitude adjustment submodule;
the frequency adjusting submodule is used for adjusting the frequency of the original signal based on the frequency parameter to obtain a driving signal and sending the driving signal to the phase difference adjusting submodule;
the phase difference adjusting submodule is used for adjusting the driving signals based on the phase difference parameters to obtain first shaft adjusting driving signals and second shaft adjusting driving signals with phase differences, sending the first shaft adjusting driving signals to the first shaft sine wave amplitude adjusting submodule and sending the second shaft adjusting driving signals to the second shaft sine wave amplitude adjusting submodule;
the first axis sine wave amplitude adjusting submodule is used for performing sine wave modulation and signal amplitude adjustment on the first axis adjusting driving signal based on the amplitude parameter to obtain a first axis driving signal;
and the second shaft sine wave amplitude adjusting submodule is used for carrying out sine wave modulation and signal amplitude adjustment on the second shaft adjusting driving signal based on the amplitude parameter to obtain the second shaft driving signal.
Optionally, the frequency parameter includes a number of waiting steps between scanning phases; the frequency regulation submodule comprises a sine wave frequency regulation counter;
and the sine wave frequency adjusting counter is used for carrying out frequency adjustment on the original signal based on the scanning phase interval waiting step number to obtain the driving signal, and outputting the driving signal to the phase difference adjusting submodule.
Optionally, the frequency parameter further includes a frequency multiplication coefficient; the frequency regulation submodule also comprises a phase-locked loop frequency divider;
the phase-locked loop frequency divider is used for dividing the frequency of the original signal based on the frequency multiplication coefficient to obtain a frequency division signal and outputting the frequency division signal to the sine wave frequency regulation counter;
and the sine wave frequency adjustment counter is used for carrying out frequency adjustment on the frequency division signal based on the scanning phase interval waiting step number to obtain the driving signal and outputting the driving signal to the phase difference adjustment submodule.
Optionally, the phase difference parameter includes a single-period scanning phase step number and a dual-channel counting difference number; the phase difference adjusting submodule comprises a sine wave phase counter and a two-axis driving signal phase difference adjuster;
the sine wave phase counter is used for counting and adjusting the driving signals based on the single-period scanning phase steps to obtain first axis adjustment driving signals, and respectively sending the first axis adjustment driving signals to the two-axis driving signal phase difference adjuster and the first axis sine wave amplitude adjustment submodule;
and the two-axis driving signal phase difference adjuster is used for adjusting the phase difference of the first axis adjusting driving signal based on the number of the two-channel counting difference values to obtain a second axis adjusting driving signal and sending the second axis adjusting driving signal to the second axis sine wave amplitude adjusting submodule.
Optionally, the amplitude parameter includes a number of scanning turns; the first axis sine wave amplitude regulation submodule comprises a first sine wave generator, a first sine type amplitude modulator and a first signal output amplitude regulator; the second shaft sine wave amplitude regulation submodule comprises a second sine wave generator, a second sine type amplitude modulator and a second signal output amplitude regulator;
the first sine wave generator is used for performing sine wave modulation on the first axis adjusting driving signal to obtain a first axis sine wave signal without amplitude modulation and sending the first axis sine wave signal to the first sine type amplitude modulator;
the first sinusoidal amplitude modulator is used for performing amplitude modulation on the first axis sine wave signal without amplitude modulation to obtain a first axis sine wave driving signal and sending the first axis sine wave driving signal to the first signal output amplitude modulator;
the first signal output amplitude adjuster is used for carrying out signal gain adjustment on the first axis sine wave driving signal based on the scanning turns to obtain the first axis driving signal;
the second sine wave generator is used for performing sine wave modulation on the second shaft adjusting driving signal to obtain a second shaft sine wave signal without amplitude modulation, and sending the second shaft sine wave signal to the second sine type amplitude modulator;
the second sinusoidal amplitude modulator is used for performing amplitude modulation on the second-shaft sine wave signal without amplitude modulation to obtain a second-shaft sine wave driving signal and sending the second-shaft sine wave driving signal to the second signal output amplitude modulator;
and the second signal output amplitude regulator is used for carrying out signal gain regulation on the second shaft sine wave driving signal based on the number of scanning turns to obtain the second shaft driving signal.
A second aspect of the present application provides a helical drive signal modulation method, comprising:
acquiring an original signal and a modulation parameter;
and performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference adjustment.
A third aspect of the present application provides an imaging system comprising a piezo ceramic tube scanning fiber optic endoscopic device and a helical drive signal modulation device as described in the first aspect of the present application.
A fourth aspect of the present application provides a scanning track acquiring system, which includes a scanner, and a scanning track capturing device and a spiral driving signal modulating device as described in the first aspect of the present application, respectively connected to the scanner.
The technical scheme provided by the application can comprise the following beneficial effects:
according to the scheme, after the original signal and the modulation parameter are obtained, signal distribution and sine parameter adjustment can be carried out on the original signal according to the modulation parameter so as to obtain the first shaft driving signal and the second shaft driving signal. Wherein the sinusoidal parameter adjustment may include at least one of an amplitude parameter adjustment, a frequency parameter adjustment, and a phase difference parameter adjustment. So, regard first axle drive signal and second axle drive signal as the binary channels sinusoidal drive signal of scanner, under binary channels sinusoidal drive signal's effect, the scanning stage of scanner can divide into forward scanning stage and reverse scanning stage, and two scanning stages are all imageable, and modulation parameter adjusts portably, and can effectively improve limit imaging frame rate.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a spiral driving signal modulation apparatus according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a modulation module of a spiral driving signal modulation apparatus according to another embodiment of the present application.
Fig. 3 is a schematic structural diagram of a modulation module of a spiral driving signal modulation apparatus according to another embodiment of the present application.
Fig. 4 is a flowchart of a spiral driving signal modulation method according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related technology, the spiral scanning is circumferential scanning with radius changing according to a certain rule, and two-axis driving signals of the spiral scanning are amplitude modulation sine waves with the same frequency and the phase difference of pi/2. The spiral scanning edge is circular, the pixel normalization frame rate is higher than that of a Lissajous shape, the middle of a scanning track is dense, the periphery of the scanning track is sparse, and the scanning track conforms to an observation sensitive range. Meanwhile, the frequency of the driving signals of the spiral scanning two shafts is the same, and the characteristics of the piezoelectric ceramic scanner are met. Therefore, helical scanning is more suitable for piezoelectric ceramic tube scanning fiber optic endoscope devices than lissajous and grid trajectories. However, most of the conventional modulation modes of the driving signal of the spiral scanning are slope amplitude modulation, the scanning under the driving signal is divided into a scanning imaging stage and a damping reset stage, the damping reset stage needs to reset the optical fiber through a reverse damping signal after the scanning is completed, the generation of the optical fiber driving signal in the reset process is complex, and the reset stage cannot perform imaging, so that the limit imaging frame rate is low.
To this end, embodiments of the present application provide a spiral drive signal modulation apparatus, which may include an acquisition module 101 and a modulation module 102, as shown in fig. 1. The acquiring module 101 is configured to acquire an original signal and a modulation parameter; and the modulation module 102 is configured to perform signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameter to obtain a first axis driving signal and a second axis driving signal, where the sinusoidal parameter adjustment includes at least one of amplitude parameter adjustment, frequency parameter adjustment, and phase difference parameter adjustment.
During implementation, the modulation module performs signal distribution on the original signal, and can divide the original signal into two parts so as to obtain a dual-channel signal, so that the requirement of the piezoelectric ceramic scanner on a two-axis alternating current modulation signal is met. After the two-channel signal is obtained, the modulation module continues to perform sinusoidal parameter adjustment on the two-channel signal, wherein the frequency parameter adjustment is performed on the two-channel signal, so that frequency adjustment is realized, the obtained first shaft driving signal and second shaft driving signal can be close to the resonance frequency of a piezoelectric ceramic tube scanner, and the scanning range of the piezoelectric ceramic tube driving optical fiber is further enlarged; amplitude parameter adjustment and phase difference parameter adjustment are carried out on the two-channel signals, so that amplitude and phase difference adjustment is realized, distortion generated in the scanning process can be corrected, and the size of a scanning area is adjusted. Finally, two paths of sinusoidal driving signals with phase difference, namely a first shaft driving signal and a second shaft driving signal, can be obtained through sinusoidal parameter adjustment of the modulation module.
In this embodiment, after the original signal and the modulation parameter are obtained, signal distribution and sine parameter adjustment may be performed on the original signal according to the modulation parameter, so as to obtain a first axis driving signal and a second axis driving signal. Wherein the sinusoidal parameter adjustment may include at least one of an amplitude parameter adjustment, a frequency parameter adjustment, and a phase difference parameter adjustment. So, regard first axle drive signal and second axle drive signal as the binary channels sinusoidal drive signal of scanner, under binary channels sinusoidal drive signal's effect, the scanning stage of scanner can divide into forward scanning stage and reverse scanning stage, and two scanning stages are all imageable, and modulation parameter adjusts portably, and can effectively improve limit imaging frame rate.
It should be noted that the sine parameter adjustment needs to be set according to actual requirements. For example, when the original signal only meets the required amplitude requirement, the sinusoidal parameter adjustment may be a frequency parameter adjustment and a phase difference parameter adjustment; when the original signal only meets the frequency requirement, the sine parameter adjustment can be amplitude adjustment and phase difference parameter adjustment; when the original signal only meets the phase difference requirement, the sine parameter adjustment can be amplitude parameter adjustment and frequency parameter adjustment; when the amplitude, the frequency and the phase difference of the original signal do not meet the requirements, the sine parameters are adjusted to be amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment.
In practical application, the first shaft driving signal and the second shaft driving signal can be used as double-channel sinusoidal driving signals with adjustable amplitude, frequency and phase difference, namely an X-shaft driving signal with adjustable amplitude, frequency and phase difference and a Y-shaft driving signal with adjustable amplitude, frequency and phase difference, so that the two-photon fluorescence scanning imaging based on the piezoelectric ceramic tube driving optical fiber with high frame rate and low distortion is realized.
In some embodiments, when performing signal allocation and sinusoidal parameter adjustment on the original signal according to the modulation parameter, the modulation module may be specifically configured to: and substituting the original signal and the modulation parameter into a preset formula to calculate and obtain a first shaft driving signal and a second shaft driving signal.
Wherein, the preset formula may be:
in the formula, V x And V y Respectively a first axis drive signal and a second axis drive signal, A x Is an amplitude parameter of the first axis drive signal, A y Is the amplitude parameter of the second axis driving signal, f is the vibration frequency parameter of the driving optical fiber, t is the oscillation time of the original signal, N is the number of scanning turns in the single image, omega 0 Is a phase difference parameter.
In specific implementation, after the original signal is acquired, the oscillation time t of the original signal may be determined as n quartz /f quartz Wherein f is quartz Is the frequency of the original signal, n quartz Is the oscillation number of the original signal, t is the frequency f of the original signal quartz Oscillation n quartz The time spent again. Similarly, after the modulation parameters are obtained, a can be determined x 、A y F, N and omega 0 . Therefore, according to the obtained original signal and the obtained modulation parameter, a double-channel sine type driving signal required by the scanner can be obtained so as to meet the requirement of the scanner.
In some embodiments, in order to facilitate control of the modulation parameters and facilitate generation of the driving signal, the modulation parameters may include: an amplitude parameter, a frequency parameter, and a phase difference parameter. Accordingly, as shown in fig. 2, the modulation module may include a frequency adjustment sub-module 201, a phase difference adjustment sub-module 202, a first axis sine wave amplitude adjustment sub-module 203, and a second axis sine wave amplitude adjustment sub-module 204.
The frequency adjusting submodule 201 is configured to adjust the frequency of the original signal based on the frequency parameter, obtain a driving signal, and send the driving signal to the phase difference adjusting submodule 202. The phase difference adjusting submodule 202 is configured to adjust the driving signal based on the phase difference parameter to obtain a first axis adjusting driving signal and a second axis adjusting driving signal with a phase difference, send the first axis adjusting driving signal to the first axis sine wave amplitude adjusting submodule 203, and send the second axis adjusting driving signal to the second axis sine wave amplitude adjusting submodule 204. And the first axis sine wave amplitude adjusting submodule 203 is configured to perform sine wave modulation and signal amplitude adjustment on the first axis adjusting driving signal based on the amplitude parameter, so as to obtain a first axis driving signal. And the second-axis sine wave amplitude adjusting submodule 204 is configured to perform sine wave modulation and signal amplitude adjustment on the second-axis adjusting driving signal based on the amplitude parameter, so as to obtain a second-axis driving signal.
For the purpose of adjusting the frequency, in some embodiments, the frequency parameter may include a number of waiting steps between scanning phases, and as shown in fig. 3, the frequency adjusting sub-module 201 may include a sine wave frequency adjusting counter, and the sine wave frequency adjusting counter may be configured to perform frequency adjustment on the original signal based on the number of waiting steps between scanning phases, obtain a driving signal, and output the driving signal to the phase difference adjusting sub-module.
In practice, at the original signal frequency f work Under the condition of being close to the natural frequency of the driving optical fiber scanner, the sine wave frequency adjusting counter can be used for adjusting the total step number to be N total The waiting counting step number N between every two scanning signal phases in the phase difference adjusting submodule wait The scanning frequency f of the driving signal is adjusted, and the scanning range can be effectively enlarged when the scanning frequency f is applied to the scanning of the piezoelectric ceramic tube driving optical fiber.
Wherein the expression of f is:
in practical application, the original signal is mostly a quartz crystal oscillator signal with a frequency f quartz In order to increase the scanning range of the optical fiber driven by the piezoelectric ceramic tube and ensure that the obtained driving signal is close to the natural frequency of the optical fiber driven by the piezoelectric ceramic tube, as shown in fig. 3, the frequency adjustment submodule may further include a phase-locked loop frequency divider, so that the phase-locked loop frequency divider may be used to perform frequency multiplication on the input quartz crystal oscillator signal, and the frequency multiplication coefficient may be N pll Obtaining a frequency of f work And the signal is input into a sine wave frequency adjustment counter for subsequent processing. Wherein f is work ＝N pll ·f quartz 。
Thus, equation (2) can also be expressed as:
in some embodiments, the phase difference parameter may include a number of single-cycle scanning phase steps and a number of dual-channel count differences for the purpose of adjusting the phase difference parameter. Accordingly, as shown in FIG. 3, phase difference adjustment submodule 202 may include a sine wave phase counter and a two axis drive signal phase difference adjuster. The sine wave phase counter is used for counting and adjusting the driving signals based on the single-period scanning phase steps to obtain first-axis adjusting driving signals, and respectively sending the first-axis adjusting driving signals to the two-axis driving signal phase difference adjuster and the first-axis sine wave amplitude adjusting submodule; and the two-axis driving signal phase difference adjuster is used for adjusting the phase difference of the first axis adjusting driving signal based on the number of the two-channel counting difference values to obtain a second axis adjusting driving signal and sending the second axis adjusting driving signal to the second axis sine wave amplitude adjusting submodule.
In practice, the sine wave phase counter may scan the phase step number N according to a single period total Counting adjustment is carried out, and the two-axis drive signal phase difference regulator counts the difference value number N through two channels phase The number of the counts is adjusted to realize the phase difference omega of the two-axis driving signals 0 Adjusting, wherein the corresponding relation is as follows:
likewise, for amplitude adjustment purposes, the amplitude parameter may include the number of scan cycles; as shown in fig. 3, the first axis sine wave amplitude adjustment sub-module 203 may include a first sine wave generator, a first sinusoidal amplitude modulator, and a first signal output amplitude adjuster; the second shaft sine wave amplitude adjustment sub-module 204 may include a second sine wave generator, a second sinusoidal amplitude modulator, and a second signal output amplitude adjuster.
The first sine wave generator is used for carrying out sine wave modulation on the first axis adjusting driving signal to obtain a first axis sine wave signal without amplitude modulation and sending the first axis sine wave signal to the first sine type amplitude modulator; the first sine type amplitude modulator is used for carrying out amplitude modulation on the first axis sine wave signal without amplitude modulation to obtain a first axis sine wave driving signal and sending the first axis sine wave driving signal to the first signal output amplitude modulator; and the first signal output amplitude regulator is used for carrying out signal gain regulation on the first axis sine wave driving signal based on the number of scanning turns to obtain a first axis driving signal. Similarly, the second sine wave generator is used for performing sine wave modulation on the second shaft adjusting driving signal to obtain a second shaft non-amplitude modulation sine wave signal and sending the second shaft non-amplitude modulation sine wave signal to the second sine type amplitude modulator; the second sinusoidal amplitude modulator is used for carrying out amplitude modulation on the second-shaft sine wave signal without amplitude modulation to obtain a second-shaft sine wave driving signal and sending the second-shaft sine wave driving signal to the second signal output amplitude modulator; and the second signal output amplitude regulator is used for carrying out signal gain regulation on the second shaft sine wave driving signal based on the number of scanning turns to obtain a second shaft driving signal.
Wherein the number of scanning turns is required according to the image resolution (NXN) total ) And frame rate (f/N), and is not limited herein.
Through the steps, the first shaft driving signal and the second shaft driving signal with the frequency, phase difference and amplitude adjustable functions shown in the formula (1) can be generated, control parameters are easy and convenient to adjust, when the method is used for spiral track scanning imaging, the imaging frame rate can be effectively improved, and great convenience is brought to users.
Based on the same technical concept, embodiments of the present application further provide a spiral driving signal modulation method, as shown in fig. 4, the spiral driving signal modulation method at least includes the following steps:
and step 41, acquiring an original signal and a modulation parameter.
And 42, performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference adjustment.
Specifically, for a specific implementation of the spiral driving signal modulation method provided in the embodiment of the present application, reference may be made to the specific implementation of the spiral driving signal modulation apparatus described in any of the above embodiments, and details are not described here again.
Embodiments of the present application provide an imaging system comprising a piezo ceramic tube scanning fiber optic endoscopic device and a helical drive signal modulation device as described in any of the above embodiments.
Embodiments of the present application provide a scanning track acquisition system, which includes a scanner, and a scanning track capturing device and a spiral driving signal modulation device as described in any of the above embodiments, respectively connected to the scanner.
Wherein the scanner may be a piezo ceramic tube driven fiber scanner.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A helical drive signal modulation apparatus, comprising:
the acquisition module is used for acquiring an original signal and a modulation parameter;
and the modulation module is used for performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment.
2. The helical drive signal modulation apparatus as claimed in claim 1, wherein, in said signal distribution and sinusoidal parameter adjustment of said original signal according to said modulation parameters, said modulation module is configured to:
substituting the original signal and the modulation parameter into a preset formula to calculate and obtain the first axis driving signal and the second axis driving signal; the preset formula comprises:
in the formula, V x And V y Respectively said first axis drive signal and said second axis drive signal, A x Is an amplitude parameter of the first axis drive signal, A y Is the amplitude parameter of the second axis driving signal, f is the vibration frequency parameter of the driving optical fiber, t is the oscillation time of the original signal, N is the number of scanning turns in the single image, omega 0 Is a phase difference parameter.
3. The helical drive signal modulation device of claim 1, wherein the modulation parameters comprise: an amplitude parameter, a frequency parameter, and a phase difference parameter; the modulation module comprises a frequency adjustment submodule, a phase difference adjustment submodule, a first axis sine wave amplitude adjustment submodule and a second axis sine wave amplitude adjustment submodule;
the frequency adjusting submodule is used for adjusting the frequency of the original signal based on the frequency parameter to obtain a driving signal and sending the driving signal to the phase difference adjusting submodule;
the phase difference adjusting submodule is used for adjusting the driving signals based on the phase difference parameters to obtain first shaft adjusting driving signals and second shaft adjusting driving signals with phase differences, sending the first shaft adjusting driving signals to the first shaft sine wave amplitude adjusting submodule and sending the second shaft adjusting driving signals to the second shaft sine wave amplitude adjusting submodule;
the first-axis sine wave amplitude adjusting submodule is used for performing sine wave modulation and signal amplitude adjustment on the first-axis adjusting driving signal based on the amplitude parameter to obtain a first-axis driving signal;
and the second shaft sine wave amplitude adjusting submodule is used for carrying out sine wave modulation and signal amplitude adjustment on the second shaft adjusting driving signal based on the amplitude parameter to obtain the second shaft driving signal.
4. The helical drive signal modulating device of claim 3 wherein the frequency parameter comprises a number of scan phase interval wait steps; the frequency regulation submodule comprises a sine wave frequency regulation counter;
and the sine wave frequency adjusting counter is used for carrying out frequency adjustment on the original signal based on the waiting step number between the scanning phases to obtain the driving signal and outputting the driving signal to the phase difference adjusting submodule.
5. The helical drive signal modulation device according to claim 4, wherein the frequency parameter further comprises a multiplication factor; the frequency regulation submodule also comprises a phase-locked loop frequency divider;
the phase-locked loop frequency divider is used for dividing the frequency of the original signal based on the frequency multiplication coefficient to obtain a frequency division signal and outputting the frequency division signal to the sine wave frequency regulation counter;
and the sine wave frequency adjustment counter is used for carrying out frequency adjustment on the frequency division signal based on the scanning phase interval waiting step number to obtain the driving signal and outputting the driving signal to the phase difference adjustment submodule.
6. The helical drive signal modulation device of claim 3 wherein the phase difference parameters include a single cycle scan phase step count and a two channel count difference count; the phase difference adjusting submodule comprises a sine wave phase counter and a two-axis driving signal phase difference adjuster;
the sine wave phase counter is used for counting and adjusting the driving signals based on the single-period scanning phase step number to obtain first-axis adjustment driving signals, and respectively sending the first-axis adjustment driving signals to the two-axis driving signal phase difference adjuster and the first-axis sine wave amplitude adjustment submodule;
and the two-axis driving signal phase difference adjuster is used for adjusting the phase difference of the first axis adjusting driving signal based on the number of the two-channel counting difference values to obtain a second axis adjusting driving signal and sending the second axis adjusting driving signal to the second axis sine wave amplitude adjusting submodule.
7. The helical drive signal modulation device as claimed in claim 3, wherein the amplitude parameter comprises a number of scan cycles; the first axis sine wave amplitude regulation submodule comprises a first sine wave generator, a first sine type amplitude modulator and a first signal output amplitude regulator; the second shaft sine wave amplitude regulation submodule comprises a second sine wave generator, a second sine type amplitude modulator and a second signal output amplitude regulator;
the first sine wave generator is used for performing sine wave modulation on the first axis adjusting driving signal to obtain a first axis sine wave signal without amplitude modulation and sending the first axis sine wave signal to the first sine type amplitude modulator;
the first sinusoidal amplitude modulator is used for performing amplitude modulation on the first axis sine wave signal without amplitude modulation to obtain a first axis sine wave driving signal and sending the first axis sine wave driving signal to the first signal output amplitude modulator;
the first signal output amplitude regulator is used for carrying out signal gain regulation on the first axis sine wave driving signal based on the number of scanning turns to obtain a first axis driving signal;
the second sine wave generator is used for performing sine wave modulation on the second shaft adjusting driving signal to obtain a second shaft non-amplitude modulation sine wave signal and sending the second shaft non-amplitude modulation sine wave signal to the second sine type amplitude modulator;
the second sinusoidal amplitude modulator is used for performing amplitude modulation on the second-shaft sine wave signal without amplitude modulation to obtain a second-shaft sine wave driving signal and sending the second-shaft sine wave driving signal to the second signal output amplitude modulator;
and the second signal output amplitude regulator is used for carrying out signal gain regulation on the second shaft sine wave driving signal based on the number of scanning turns to obtain the second shaft driving signal.
8. A method for modulating a helical drive signal, comprising:
acquiring an original signal and a modulation parameter;
and performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain a first shaft driving signal and a second shaft driving signal, wherein the sinusoidal parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference adjustment.
9. An imaging system comprising a piezo ceramic tube scanning fiber optic endoscopic device and a helical drive signal modulation device as claimed in any one of claims 1 to 7.
10. A scanning track acquisition system, comprising a scanner and a scanning track capturing device and a helical driving signal modulation device according to any one of claims 1 to 7 respectively connected with the scanner.
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