CN114826415B - Spiral drive signal modulation device and method, imaging system - Google Patents

Abstract

This application relates to a spiral drive signal modulation device and method, and an imaging system. The spiral drive signal modulation device includes: an acquisition module for acquiring the original signal and modulation parameters; a modulation module for performing signal processing on the original signal according to the modulation parameters. Distribution and sinusoidal parameter adjustment are performed to obtain the first axis drive signal and the second axis drive signal, and the sinusoidal parameter adjustment includes at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment. In this way, the first-axis drive signal and the second-axis drive signal are used as the dual-channel sinusoidal drive signals of the scanner. Under the action of the dual-channel sinusoidal drive signals, the scanning phase of the scanner can be divided into a forward scanning phase and a reverse scanning phase. In the forward scanning stage, imaging can be performed in both scanning stages, the modulation parameters are easy to adjust, and the ultimate imaging frame rate can be effectively increased.

Description

Spiral drive signal modulation device and method, imaging system

Technical field

The present application relates to the field of optical imaging technology, and specifically to a spiral drive signal modulation device and method, and an imaging system.

Background technique

Multi-photon fluorescence endoscopes based on piezoelectric ceramic tube driven optical fiber scanning imaging need to apply two-axis AC modulation signals to the piezoelectric ceramic scanner to drive the optical fiber to achieve scanning of a certain area in a two-dimensional plane. Common scanning schemes include spiral scanning, raster scanning, and Lissajous scanning. Compared with Lissajous scanning and raster scanning, spiral scanning is more suitable for piezoelectric ceramic tube scanning fiber endoscope devices.

In the related art, the modulation method of the driving signal for spiral trajectory scanning is mostly slope amplitude modulation. Scanning under this driving signal is divided into a scanning imaging stage and a damping reset stage. The damping reset stage requires a feedback process after the scanning is completed. Reset the fiber to the damping signal. However, the generation of optical fiber drive signals during the reset process is more complicated, and imaging cannot be performed during the reset phase, resulting in a low ultimate imaging frame rate.

Contents of the invention

In view of this, the purpose of this application is to overcome the technical problems in the prior art that the drive signal generation for spiral trajectory scanning is relatively complex and the ultimate imaging frame rate is low, and to provide a spiral drive signal modulation device and method, and an imaging system.

In order to achieve the above objectives, this application adopts the following technical solutions:

The first aspect of this application provides a spiral drive signal modulation device, including:

Acquisition module, used to obtain original signals and modulation parameters;

Modulation module, used to perform signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain the first axis drive signal and the second axis drive signal. The sinusoidal parameter adjustment includes amplitude parameter adjustment and frequency parameter adjustment. and at least one of phase difference parameter adjustment.

Optionally, when performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters, the modulation module is used to:

The original signal and the modulation parameter are brought into a preset formula to calculate and obtain the first axis drive signal and the second axis drive signal; the preset formula includes:

In the formula, V _x and V _y are the first axis drive signal and the second axis drive signal respectively, _Ax is the amplitude parameter of the first axis drive signal, and A _y is the second axis drive signal. The amplitude parameter of , f is the vibration frequency parameter of the driving fiber, t is the oscillation time of the original signal, N is the number of scanning turns in a single image, and ω ₀ is the phase difference parameter.

Optionally, the modulation parameters include: amplitude parameters, frequency parameters and phase difference parameters; the modulation module includes a frequency adjustment sub-module, a phase difference adjustment sub-module, a first-axis sine wave amplitude adjustment sub-module and a second-axis sine wave amplitude adjustment sub-module. Wave amplitude adjustment submodule;

The frequency adjustment sub-module is used to adjust the frequency of the original signal based on the frequency parameter, obtain a driving signal, and send it to the phase difference adjustment sub-module;

The phase difference adjustment sub-module is used to adjust the drive signal based on the phase difference parameter, obtain a first axis adjustment drive signal and a second axis adjustment drive signal with a phase difference, and send the first axis adjustment drive signal. The axis adjustment drive signal is sent to the first axis sine wave amplitude adjustment sub-module, and the second axis adjustment drive signal is sent to the second axis sine wave amplitude adjustment sub-module;

The first axis sine wave amplitude adjustment submodule is used to perform sine wave modulation and signal amplitude adjustment on the first axis adjustment drive signal based on the amplitude parameter to obtain the first axis drive signal;

The second axis sine wave amplitude adjustment sub-module is used to perform sine wave modulation and signal amplitude adjustment on the second axis adjustment drive signal based on the amplitude parameter to obtain the second axis drive signal.

Optionally, the frequency parameters include the number of waiting steps between scanning phases; the frequency adjustment sub-module includes a sine wave frequency adjustment counter;

The sine wave frequency adjustment counter is used to frequency adjust the original signal based on the number of waiting steps between scanning phases, obtain the driving signal, and output it to the phase difference adjustment sub-module.

Optionally, the frequency parameter also includes a frequency multiplication coefficient; the frequency adjustment sub-module also includes a phase-locked loop frequency divider;

The phase-locked loop frequency divider is used to divide the original signal based on the frequency multiplication coefficient to obtain a frequency-divided signal and output it to the sine wave frequency adjustment counter;

The sine wave frequency adjustment counter is used to adjust the frequency of the frequency division signal based on the number of waiting steps between scanning phases to obtain the driving signal and output it to the phase difference adjustment sub-module.

Optionally, the phase difference parameters include the number of single-cycle scanning phase steps and the number of dual-channel counting differences; the phase difference adjustment sub-module includes a sine wave phase counter and a two-axis drive signal phase difference regulator;

The sine wave phase counter is used to count and adjust the drive signal based on the single-cycle scanning phase steps, obtain the first axis adjustment drive signal, and send it to the two-axis drive signal phase difference adjustment respectively. converter and the first-axis sine wave amplitude adjustment sub-module;

The two-axis drive signal phase difference adjuster is used to adjust the phase difference of the first axis adjustment drive signal based on the dual-channel count difference number to obtain the second axis adjustment drive signal and send it to the Describe the second axis sine wave amplitude adjustment submodule.

Optionally, the amplitude parameter includes the number of scanning turns; the first axis sine wave amplitude adjustment sub-module includes a first sine wave generator, a first sine amplitude modulator and a first signal output amplitude adjuster; The second axis sine wave amplitude adjustment sub-module includes a second sine wave generator, a second sinusoidal amplitude modulator and a second signal output amplitude adjuster;

The first sine wave generator is used to perform sine wave modulation on the first axis adjustment drive signal to obtain a first axis non-amplitude modulated sine wave signal and send it to the first sinusoidal amplitude modulator;

The first sinusoidal amplitude modulator is used to perform amplitude modulation on the first axis non-amplitude modulated sine wave signal to obtain the first axis sine wave driving signal and send it to the first signal to output amplitude adjustment. device;

The first signal output amplitude adjuster is used to perform signal gain adjustment on the first axis sine wave drive signal based on the number of scanning turns to obtain the first axis drive signal;

The second sine wave generator is used to perform sine wave modulation on the second axis adjustment drive signal to obtain a second axis non-amplitude modulated sine wave signal and send it to the second sinusoidal amplitude modulator;

The second sinusoidal amplitude modulator is used to perform amplitude modulation on the second axis non-amplitude modulated sine wave signal to obtain the second axis sine wave driving signal and send it to the second signal to output amplitude adjustment. device;

The second signal output amplitude adjuster is used to perform signal gain adjustment on the second axis sine wave drive signal based on the number of scanning turns to obtain the second axis drive signal.

The second aspect of this application provides a spiral driving signal modulation method, including:

Get the original signal and modulation parameters;

Perform signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain the first axis drive signal and the second axis drive signal. The sinusoidal parameter adjustment includes amplitude parameter adjustment, frequency parameter adjustment and phase difference adjustment. of at least one.

A third aspect of the present application provides an imaging system, including a piezoelectric ceramic tube scanning fiber endoscope device and a spiral drive signal modulation device as described in the first aspect of the present application.

A fourth aspect of the application provides a scanning trajectory acquisition system, including a scanner, a scanning trajectory capturing device respectively connected to the scanner, and a spiral drive signal modulation device as described in the first aspect of the application.

The technical solution provided by this application can include the following beneficial effects:

In the solution of this application, after the original signal and modulation parameters are obtained, signal distribution and sinusoidal parameter adjustment can be performed on the original signal according to the modulation parameters to obtain the first axis drive signal and the second axis drive signal. The sinusoidal parameter adjustment may include at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment. In this way, the first axis drive signal and the second axis drive signal are used as the dual-channel sinusoidal drive signals of the scanner. Under the action of the dual-channel sinusoidal drive signals, the scanning phase of the scanner can be divided into a forward scanning phase and a reverse scanning phase. In the forward scanning stage, imaging can be performed in both scanning stages, the modulation parameters are easy to adjust, and the ultimate imaging frame rate can be effectively increased.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a spiral drive signal modulation device provided by an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a modulation module of a spiral drive signal modulation device provided by another embodiment of the present application.

Figure 3 is a schematic structural diagram of a modulation module of a spiral drive signal modulation device provided by yet another embodiment of the present application.

FIG. 4 is a flow chart of a spiral driving signal modulation method provided by another embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other implementations obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of this application.

In the related art, the spiral scan is a circular scan with a radius that changes according to a certain rule, and its two-axis drive signals are amplitude-modulated sine waves with the same frequency and a phase difference of π/2. The spiral scanning edge is circular, and its pixel normalized frame rate is higher than that of the Lissajous shape. The scanning track is dense in the middle and sparse around it, which is consistent with the observation sensitive range. At the same time, the driving signal frequency of the two axes of the spiral scanning is the same, which is consistent with the characteristics of the piezoelectric ceramic scanner. Therefore, compared with Lissajous and grid trajectories, spiral scanning is more suitable for piezoelectric ceramic tube scanning fiber endoscope devices. However, the modulation method of the existing drive signal for spiral scanning is mostly ramp-type amplitude modulation. Scanning under this drive signal is divided into a scanning imaging stage and a damping reset stage. The damping reset stage requires feedback after the scan is completed. The damping signal is used to reset the optical fiber. However, the generation of the optical fiber drive signal during the reset process is more complicated, and imaging cannot be performed during the reset stage, resulting in a low ultimate imaging frame rate.

To this end, embodiments of the present application provide a spiral driving signal modulation device. As shown in FIG. 1 , the device may include an acquisition module 101 and a modulation module 102 . Among them, the acquisition module 101 is used to acquire the original signal and modulation parameters; the modulation module 102 is used to perform signal distribution and sine parameter adjustment on the original signal according to the modulation parameters to obtain the first axis drive signal and the second axis drive signal, sine Parameter adjustment includes at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment.

During implementation, the modulation module distributes the original signal and can divide the original signal into two to obtain a dual-channel signal to meet the needs of the piezoelectric ceramic scanner for two-axis AC modulated signals. After obtaining the dual-channel signal, the modulation module continues to adjust the sinusoidal parameters of the dual-channel signal. Among them, the frequency parameter of the dual-channel signal is adjusted to achieve adjustable frequency, which can make the obtained first-axis drive signal and second-axis drive signal It is close to the resonant frequency of the piezoelectric ceramic tube scanner, thereby increasing the piezoelectric ceramic tube driven optical fiber scanning range; adjusting the amplitude parameters and phase difference parameters of the dual-channel signal to achieve adjustable amplitude and phase difference, which can correct the scanning process The distortion produced while adjusting the scan area size. Finally, after adjusting the sinusoidal parameters of the modulation module, two sinusoidal drive signals with phase differences can be obtained, namely the first-axis drive signal and the second-axis drive signal.

In this embodiment, after acquiring the original signal and modulation parameters, signal distribution and sinusoidal parameter adjustment can be performed on the original signal according to the modulation parameters to obtain the first axis driving signal and the second axis driving signal. The sinusoidal parameter adjustment may include at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment. In this way, the first axis drive signal and the second axis drive signal are used as the dual-channel sinusoidal drive signals of the scanner. Under the action of the dual-channel sinusoidal drive signals, the scanning phase of the scanner can be divided into a forward scanning phase and a reverse scanning phase. In the forward scanning stage, imaging can be performed in both scanning stages, the modulation parameters are easy to adjust, and the ultimate imaging frame rate can be effectively increased.

It should be noted that the sine parameter adjustment needs to be set according to actual needs. For example, when the original signal only meets the required amplitude requirements, the sine parameter adjustment can be frequency parameter adjustment and phase difference parameter adjustment; when the original signal only meets the frequency requirements, the sine parameter adjustment can be amplitude adjustment and phase difference parameter adjustment; when When the original signal only meets the phase difference requirements, the sine parameter adjustment can be amplitude parameter adjustment and frequency parameter adjustment; when the amplitude, frequency and phase difference of the original signal do not meet the requirements, the sine parameter adjustment can be amplitude parameter adjustment, frequency parameter adjustment and Phase difference parameter adjustment.

In practical applications, the first-axis drive signal and the second-axis drive signal can be used as dual-channel sinusoidal drive signals with adjustable amplitude, frequency, and phase difference, that is, an X-axis drive signal with adjustable amplitude, frequency, and phase difference, and an amplitude, frequency, and phase difference adjustable X-axis drive signal. The Y-axis drive signal with adjustable frequency and phase difference realizes two-photon fluorescence scanning imaging with high frame rate and low distortion based on piezoelectric ceramic tube driven optical fiber.

In some embodiments, when performing signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters, the modulation module can be specifically used to: bring the original signal and modulation parameters into the preset formula to calculate and obtain the first axis drive signal and second axis drive signal.

Among them, the preset formula can be:

In the formula, V _x and V _y are the first-axis drive signal and the second-axis drive signal respectively, A _x is the amplitude parameter of the first-axis drive signal, A _y is the amplitude parameter of the second-axis drive signal, and f is the drive fiber. Vibration frequency parameter, t is the oscillation time of the original signal, N is the number of scanning circles in a single image, and ω ₀ is the phase difference parameter.

In specific implementation, after obtaining the original signal, the oscillation time of the original signal t=n _quartz /f _quartz can be determined, where f _quartz is the frequency of the original signal, n _quartz is the number of oscillations of the original signal, and t is The time it takes for the original signal to oscillate n _quartz times at frequency f _quartz . Similarly, after obtaining the modulation parameters, A _x , A _y , f, N and ω ₀ can be determined. In this way, based on the obtained original signal and modulation parameters, the dual-channel sinusoidal driving signal required by the scanner can be obtained to meet the needs of the scanner.

In some embodiments, in order to make it easier to control the modulation parameters and make the generation of the driving signal easier, the modulation parameters may include: amplitude parameters, frequency parameters and phase difference parameters. Correspondingly, as shown in Figure 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.

Among them, the frequency adjustment sub-module 201 is used to adjust the frequency of the original signal based on the frequency parameter, obtain a driving signal, and send it to the phase difference adjustment sub-module 202. The phase difference adjustment sub-module 202 is used to adjust the drive signal based on the phase difference parameter, obtain the first axis adjustment drive signal and the second axis adjustment drive signal with a phase difference, and send the first axis adjustment drive signal to the first axis adjustment drive signal. The axis sine wave amplitude adjustment sub-module 203 sends the second axis adjustment driving signal to the second axis sine wave amplitude adjustment sub-module 204. The first axis sine wave amplitude adjustment sub-module 203 is used to perform sine wave modulation and signal amplitude adjustment on the first axis adjustment drive signal based on the amplitude parameter to obtain the first axis drive signal. The second axis sine wave amplitude adjustment sub-module 204 is used to perform sine wave modulation and signal amplitude adjustment on the second axis adjustment drive signal based on the amplitude parameter to obtain the second axis drive signal.

In order to achieve the purpose of adjusting the frequency, in some embodiments, the frequency parameters may include the number of waiting steps between scanning phases. As shown in Figure 3, the frequency adjustment sub-module 201 may include a sine wave frequency adjustment counter, and the sine wave frequency adjustment counter may be used for The frequency of the original signal is adjusted based on the number of waiting steps between scanning phases to obtain the driving signal, which is output to the phase difference adjustment sub-module.

During specific implementation, when the original signal frequency f _work is close to the natural frequency of the driving fiber scanner, the sine wave frequency adjustment counter can be used to adjust the phase difference between each two scanning signal phases in the phase difference adjustment sub-module with a total number of steps of N _total . The number of waiting counting steps N _wait achieves the purpose of adjusting the driving signal scanning frequency f. When applied to piezoelectric ceramic tube driven optical fiber scanning, the scanning range can be effectively improved.

Among them, the expression of f is:

In practical applications, the original signal is mostly a quartz crystal oscillator signal, and its frequency is f _quartz . In order to improve the scanning range of the piezoelectric ceramic tube driven optical fiber, ensure that the obtained driving signal is close to the natural frequency of the piezoelectric ceramic tube driven optical fiber scanner, as shown in Figure 3 As shown, the frequency adjustment sub-module can also include a phase-locked loop frequency divider. In this way, the phase-locked loop frequency divider can be used to multiply the input quartz crystal oscillator signal. The frequency multiplication coefficient can be N _pll , and the obtained frequency is f _work The signal is input into the sine wave frequency adjustment counter for subsequent processing. Among them, f _work =N _pll ·f _quartz .

In this way, formula (2) can also be expressed as:

In some embodiments, in order to achieve the purpose of phase difference parameter adjustment, the phase difference parameters may include the number of single-cycle scan phase steps and the number of dual-channel count differences. Correspondingly, as shown in FIG. 3 , the phase difference adjustment sub-module 202 may include a sine wave phase counter and a two-axis drive signal phase difference adjuster. Among them, the sine wave phase counter is used to count and adjust the driving signal based on the single-cycle scanning phase steps to obtain the first axis adjustment driving signal, and send it to the two-axis driving signal phase difference adjuster and the first axis sine wave amplitude respectively. Adjustment submodule; two-axis drive signal phase difference regulator, used to adjust the phase difference of the first-axis adjustment drive signal based on the dual-channel count difference number, obtain the second-axis adjustment drive signal, and send it to the second-axis sine wave Amplitude adjustment submodule.

During implementation, the sine wave phase counter can be adjusted according to the single-cycle scanning phase step number N _total , and the two-axis drive signal phase difference regulator adjusts the count number through the dual-channel counting difference number N _phase to realize the two-axis drive signal. Phase difference ω ₀ adjustment, the corresponding relationship is as follows:

Similarly, in order to achieve the purpose of amplitude adjustment, the amplitude parameter may include the number of scanning turns; as shown in Figure 3, the first axis sine wave amplitude adjustment sub-module 203 may include a first sine wave generator, a first sine amplitude modulator and a first signal output amplitude adjuster; the second axis 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.

Among them, the first sine wave generator is used to perform sine wave modulation on the first axis adjustment drive signal to obtain the first axis non-amplitude modulated sine wave signal and send it to the first sinusoidal amplitude modulator; the first sinusoidal amplitude modulation The controller is used to perform amplitude modulation on the first axis non-amplitude modulated sine wave signal to obtain the first axis sine wave driving signal and send it to the first signal output amplitude regulator; the first signal output amplitude regulator is used to scan based on The number of turns performs signal gain adjustment on the first axis sine wave drive signal to obtain the first axis drive signal. Similarly, the second sine wave generator is used to sine wave modulate the second axis adjustment drive signal to obtain the second axis non-amplitude modulated sine wave signal and send it to the second sine type amplitude modulator; the second sine type The amplitude modulator is used to perform amplitude modulation on the second axis non-amplitude modulated sine wave signal to obtain the second axis sine wave drive signal and send it to the second signal output amplitude regulator; the second signal output amplitude regulator is used to The second axis sine wave drive signal is signal gain adjusted based on the number of scanning turns to obtain the second axis drive signal.

Among them, the number of scanning circles needs to be set according to the requirements of image resolution (N×N _total ) and frame rate (f/N), and is not limited here.

After the above steps, the first-axis drive signal and the second-axis drive signal with adjustable frequency, phase difference and amplitude functions as shown in the above formula (1) can be generated. The control parameters are easy to adjust and are used for spiral trajectory scanning. During imaging, the imaging frame rate can be effectively increased, bringing great convenience to users.

Based on the same technical concept, embodiments of the present application also provide a spiral drive signal modulation method. As shown in Figure 4, the spiral drive signal modulation method at least includes the following steps:

Step 41: Obtain the original signal and modulation parameters.

Step 42: Perform signal distribution and sinusoidal parameter adjustment on the original signal according to the modulation parameters to obtain the first axis drive signal and the second axis drive signal. The sinusoidal parameter adjustment includes at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference adjustment. kind.

Specifically, the specific implementation of the spiral drive signal modulation method provided by the embodiments of the present application may refer to the specific implementation of the spiral drive signal modulation device described in any of the above embodiments, and will not be described again here.

Embodiments of the present application provide an imaging system, including a piezoelectric ceramic tube scanning fiber endoscope device and a spiral drive signal modulation device as described in any of the above embodiments.

Embodiments of the present application provide a scanning trajectory acquisition system, including a scanner, a scanning trajectory capture device respectively connected to the scanner, and a spiral drive signal modulation device as described in any of the above embodiments.

Wherein, the scanner may be a piezoelectric ceramic tube driven optical fiber scanner.

It can be understood that the same or similar parts in the above-mentioned embodiments can be referred to each other, and the content that is not described in detail in some embodiments can be referred to the same or similar content in other embodiments.

It should be noted that in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise stated, the meaning of "plurality" means at least two.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments, or portions of code that include one or more executable instructions for implementing the specified logical functions or steps of the process. , and the scope of the preferred embodiments of the present application includes additional implementations in which functions may be performed out of the order shown or discussed, including in a substantially simultaneous manner or in the reverse order, depending on the functionality involved, which shall It should be understood by those skilled in the technical field to which the embodiments of this application belong.

It should be understood that various parts of the present application can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a logic gate circuit with a logic gate circuit for implementing a logic function on a data signal. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

Those of ordinary skill in the art can understand that all or part of the steps involved in implementing the methods of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. When executed, one of the steps of the method embodiment or a combination thereof is included.

In addition, each functional unit in various embodiments of the present application can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

The storage media mentioned above can be read-only memory, magnetic disks or optical disks, etc.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (8)

1. A spiral drive signal modulation apparatus, comprising:

the acquisition module is used for acquiring the original signals and the modulation parameters; the modulation parameters include: amplitude parameters, frequency parameters, and phase difference parameters;

the modulation module is used for carrying out signal distribution and sine parameter adjustment on the original signals according to the modulation parameters based on a preset formula to obtain a first shaft driving signal and a second shaft driving signal, so that the first shaft driving signal and the second shaft driving signal are used as two-channel sine driving signals of the scanner, wherein under the action of the two-channel sine driving signals, the scanning stage of the scanner comprises a forward scanning stage and a backward scanning stage which can both be imaged; the sine parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment;

the preset formula comprises:

wherein V is _x And V _y A is the first shaft driving signal and the second shaft driving signal respectively _x For the amplitude parameter of the first axis driving signal, A _y For the amplitude parameter of the second axis driving signal, f is the driving fiber vibration frequency parameter, t is the oscillation time of the original signal, N is the scanning circle number, omega in the single image ₀ Is a phase difference parameter;

the modulation module comprises a frequency adjustment sub-module, a phase difference adjustment sub-module, a first axis sine wave amplitude adjustment sub-module and a second axis sine wave amplitude adjustment sub-module;

the frequency adjusting sub-module 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 sub-module;

the phase difference adjusting sub-module is used for adjusting the driving signals based on the phase difference parameters to obtain a first axis adjusting driving signal and a second axis adjusting driving signal with phase difference, sending the first axis adjusting driving signal to the first axis sine wave amplitude adjusting sub-module and sending the second axis adjusting driving signal to the second axis sine wave amplitude adjusting sub-module;

the first axis sine wave amplitude adjustment submodule is used for carrying out sine wave modulation and signal amplitude adjustment on the first axis adjustment driving signal based on the amplitude parameter to obtain the first axis driving signal;

and the second axis sine wave amplitude adjustment sub-module is used for carrying out sine wave modulation and signal amplitude adjustment on the second axis adjustment driving signal based on the amplitude parameter to obtain the second axis driving signal.

2. The spiral driving signal modulation apparatus of claim 1, wherein the frequency parameter comprises a number of scan-phase waiting steps; the frequency adjustment submodule comprises a sine wave frequency adjustment counter;

the sine wave frequency adjustment counter is used for carrying out frequency adjustment on the original signal based on the number of waiting steps among the scanning phases, obtaining the driving signal and outputting the driving signal to the phase difference adjustment submodule.

3. The spiral driving signal modulation apparatus of claim 2, wherein the frequency parameter further comprises a frequency multiplication factor; the frequency adjustment submodule further 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 adjustment counter;

the sine wave frequency adjustment counter is used for carrying out frequency adjustment on the frequency division signal based on the number of waiting steps among the scanning phases, obtaining the driving signal and outputting the driving signal to the phase difference adjustment submodule.

4. The spiral driving signal modulation apparatus according to claim 1, wherein the phase difference parameter includes a single period scanning phase step number and a two channel count 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 step number to obtain the first axis adjusting driving signals and respectively sending the first axis adjusting driving signals to the two-axis driving signal phase difference regulator and the first axis sine wave amplitude adjusting submodule;

and the two-axis driving signal phase difference adjuster is used for carrying out phase difference adjustment on the first axis adjusting driving signal based on the two-channel counting difference value quantity to obtain the second axis adjusting driving signal and sending the second axis adjusting driving signal to the second axis sine wave amplitude adjusting sub-module.

5. The helical drive signal modulation device according to claim 1, wherein the amplitude parameter comprises a number of scan turns; the first axis sine wave amplitude adjusting submodule comprises a first sine wave generator, a first sine wave amplitude modulator and a first signal output amplitude adjuster; the second axis sine wave amplitude adjustment submodule comprises a second sine wave generator, a second sine wave 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 amplitude-free modulation sine wave signal and sending the first axis amplitude-free modulation sine wave signal to the first sine wave amplitude modulator;

the first sinusoidal amplitude modulator is used for amplitude modulating the first-axis amplitude-free modulated sinusoidal wave signal to obtain the first-axis sinusoidal wave driving signal, and transmitting the first-axis sinusoidal 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 scanning turns to obtain the first axis driving signal;

the second sine wave generator is used for carrying out sine wave modulation on the second shaft adjusting driving signal to obtain a second shaft amplitude-free modulation sine wave signal, and sending the second amplitude-free modulation sine wave signal to the second sine wave amplitude modulator;

the second sinusoidal amplitude modulator is configured to perform amplitude modulation on the second axis non-amplitude-modulated sinusoidal signal to obtain the second axis sinusoidal driving signal, and send the second axis sinusoidal driving signal to the second signal output amplitude modulator;

and the second signal output amplitude regulator is used for carrying out signal gain adjustment on the second axis sine wave driving signal based on the scanning turns to obtain the second axis driving signal.

6. A method of modulating a helical drive signal, comprising:

acquiring an original signal and a modulation parameter; the modulation parameters include: amplitude parameters, frequency parameters, and phase difference parameters;

based on a preset formula, carrying out signal distribution and sine parameter adjustment on the original signals according to the modulation parameters to obtain a first axis driving signal and a second axis driving signal, and taking the first axis driving signal and the second axis driving signal as two-channel sine driving signals of a scanner, wherein under the action of the two-channel sine driving signals, a scanning stage of the scanner comprises a forward scanning stage and a reverse scanning stage which can both be imaged; the sine parameter adjustment comprises at least one of amplitude parameter adjustment, frequency parameter adjustment and phase difference parameter adjustment;

the preset formula comprises:

wherein V is _x And V _y A is the first shaft driving signal and the second shaft driving signal respectively _x For the amplitude parameter of the first axis driving signal, A _y For the amplitude parameter of the second axis driving signal, f is the driving fiber vibration frequency parameter, t is the oscillation time of the original signal, N is the scanning circle number, omega in the single image ₀ Is a phase difference parameter;

the step of performing 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, including: adjusting the frequency of the original signal based on the frequency parameter to obtain a driving signal; based on the phase difference parameter, adjusting the driving signal to obtain a first axis adjusting driving signal and a second axis adjusting driving signal with a phase difference; and performing sine wave modulation and signal amplitude adjustment on the first shaft adjusting driving signal based on the amplitude parameter to obtain the first shaft driving signal, and performing 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.

7. An imaging system comprising a piezo-ceramic tube scanning fiber endoscope apparatus and a helical drive signal modulation apparatus as claimed in any one of claims 1 to 5.

8. A scanning track acquisition system comprising a scanner, and a scanning track capturing device and a spiral drive signal modulating device according to any one of claims 1-5, respectively connected to the scanner.