A method for adjusting the output power of a helium-neon laser of amblyopia treatment device

Abstract

The method of the present invention provides a method for adjusting the output power of a helium-neon laser of an amblyopia therapeutic device, which has the following beneficial effects: through fine closed-loop PTD control of three parameters, namely, total gas pressure, gas ratio and discharge current, the laser power output is stable and adjustable, which can meet market demand and is superior to most control methods in the same industry.

Description

Technical Field

[0001] The method of the invention relates to laser output power regulation and artificial intelligence, and in particular to a method for regulating the output power of a helium-neon laser of an amblyopia therapeutic device. Background Art

[0002] Currently, the most effective treatments for amblyopia include optical correction, occlusion therapy, CAM therapy, afterimage therapy, and suppression therapy. Helium-neon laser is a red visible light with a wavelength of 632.8nm. After being absorbed by tissues, it can promote their growth and repair. The mechanism of using helium-neon laser to treat amblyopia is to use low-power helium-neon laser to irradiate the macula, promote blood circulation in the macula, and improve the function of cone cells in the fovea of ​​the amblyopic eye. Because the energy of helium-neon laser is small, multiple small-dose irradiations can have a cumulative effect of biological stimulation, which is equivalent to the biological effect caused by a large-dose irradiation. Therefore, the irradiation power of helium-neon laser is selected to be 1mV, the irradiation time is 3min / time, and irradiation is once a day. At the same time, considering that the biological stimulation of helium-neon laser is parabolic, the reaction intensity has a peak as the number of stimulations increases, and the reaction intensity decreases significantly when the number of stimulations increases, so a course of treatment should not exceed 20 days.

[0003] Low-power helium-neon laser treatment has a short course of treatment and the children's vision improves significantly during the treatment, which greatly improves the compliance of the children and their parents and achieves good clinical results. However, amblyopia treatment cannot be completed in a short period of time, and long-term follow-up of these children is necessary. Since the power required for treatment is extremely low, the industry has extremely high requirements for the control accuracy of the helium-neon laser output power of amblyopia treatment equipment. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, in the method system of the present invention, the three parameters of total gas pressure, gas ratio and discharge current are finely controlled by PID closed loop. The laser power output is stable and adjustable. The purpose of the method of the present invention is to provide a method for adjusting the output power of the helium-neon laser of amblyopia treatment equipment to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a method for adjusting the output power of a helium-neon laser of an amblyopia treatment device, comprising the steps of:

[0006] S1) collecting gas pressure sensor data to obtain gas pressure value G;

[0007] S2) Input gas mixing ratio R;

[0008] S3) Input gas pressure sensitivity parameter S G ;

[0009] S4) Input gas mixture ratio sensitivity parameter S R ;

[0010] S5) Input discharge current sensitivity parameter S I ;

[0011] S6) Input air pressure PID loop parameter GK p , G.K. i , G.K. d ;

[0012] S7) Input gas mixture ratio PID loop parameter RK p , R.K. i , R.K. d ;

[0013] S8) Input the discharge current PID loop parameter IK p , IK i , IK d ; and discharge current I;

[0014] S9) Input target power value P D ;

[0015] S10) Obtain the current laser output power value P O ;

[0016] S11) calls the PID operator and performs the following calculations:

[0017]

[0018] Where e(t) is the cumulative error between the target power value and the actual output value. is the differential of the accumulated error, u i is the output value; when the steady state is reached, e(t)| t→∞ =P O -P D ;

[0019] S12) u i Multiply it by the adjustment sensitivity K and output it to the discharge current regulator to achieve the target adjustment;

[0020] S13) Repeat steps S10) to S12).

[0021] Optionally, the gas pressure sensitivity parameter S G From calibration.

[0022] Optionally, the gas mixture ratio sensitivity parameter S R From calibration.

[0023] Optionally, the discharge current sensitivity parameter S I From calibration.

[0024] Optionally, the adjustment sensitivity K comes from calibration.

[0025] As described above, the method of the present invention provides a method for adjusting the output power of a helium-neon laser of an amblyopia therapeutic device, which has the following beneficial effects: fine control of the three parameters of PID closed loop, namely, total gas pressure, gas ratio and discharge current. Since the proportional term of the PID algorithm represents the current information, it plays a role in correcting deviations and makes the process respond quickly. The differential term has a leading control effect when the signal changes, representing future information, forcing the process to proceed at the beginning of the process, reducing overshoot at the end of the process, overcoming oscillation, improving the stability of the system, and accelerating the transition process of the system. The integral term represents the information accumulated in the past, which can eliminate static errors and improve the static characteristics of the system. If these three functions are properly coordinated, the dynamic process can be fast, stable and accurate, and good results can be obtained, so that the laser power output is stable and adjustable, which can meet market demand and is superior to most control methods in the same industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a method for adjusting the output power of a helium-neon laser of an amblyopia treatment device provided by an embodiment; DETAILED DESCRIPTION

[0027] The following is an explanation of the embodiments of the method of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the method of the present invention from the contents disclosed in this specification. The method of the present invention can also be implemented or applied by other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the method of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the method of the present invention. Therefore, the drawings only show components related to the method of the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0029] See also Figure 1 As shown, the method of the present invention provides a method for adjusting the output power of a helium-neon laser of an amblyopia therapeutic device, comprising the steps of:

[0030] S1) collecting gas pressure sensor data to obtain gas pressure value G;

[0031] S2) Input gas mixing ratio R;

[0032] S3) Input gas pressure sensitivity parameter S G ;

[0033] S4) Input gas mixture ratio sensitivity parameter S R ;

[0034] S5) Input discharge current sensitivity parameter S I ;

[0035] S6) Input air pressure PID loop parameter GK p , G.K. i , G.K. d ;

[0036] S7) Input gas mixture ratio PID loop parameter RK p , R.K. i , R.K. d ;

[0037] S8) Input the discharge current PID loop parameter IK p , IK i , IK d ; and discharge current I;

[0038] S9) Input target power value P D ;

[0039] S10) Obtain the current laser output power value P O ;

[0040] S11) calls the PID operator and performs the following calculations:

[0041]

[0042] Where e(t) is the cumulative error between the target power value and the actual output value. is the differential of the accumulated error, u i is the output value; when the steady state is reached, e(t)| t→∞ =P O -P D ;

[0043] S12) u i Multiply it by the adjustment sensitivity K and output it to the discharge current regulator to achieve the target adjustment;

[0044] S13) Repeat steps S10) to S12).

[0045] In an exemplary embodiment, the gas pressure sensitivity parameter S G The gas mixture ratio sensitivity parameter S is obtained after calibration. R The discharge current sensitivity parameter S is obtained after calibration.I The adjustment sensitivity K is obtained after calibration.

[0046] In summary, the method of the present invention provides a method for adjusting the output power of a helium-neon laser of an amblyopia treatment device, which has the following beneficial effects: fine control of the three parameters of PID closed loop, namely, total gas pressure, gas ratio and discharge current. Since the proportional term of the PID algorithm represents the current information, it plays a role in correcting deviations and makes the process respond quickly. The differential term has a leading control effect when the signal changes, representing future information, forcing the process to proceed at the beginning of the process, reducing overshoot at the end of the process, overcoming oscillation, improving the stability of the system, and accelerating the transition process of the system. The integral term represents the information accumulated in the past, which can eliminate static errors and improve the static characteristics of the system. The proper coordination of these three functions can make the dynamic process fast, smooth and accurate, and obtain good results, making the laser power output stable and adjustable, meeting market demand, and being superior to most control methods in the same industry.

[0047] The above embodiments are merely illustrative of the principles and effects of the method of the present invention, and are not intended to limit the method of the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the method of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the method of the present invention shall still be covered by the claims of the method of the present invention.

Claims

1. A method for adjusting the output power of a helium-neon laser of an amblyopia treatment device, characterized in that: Includes steps: S1) collecting gas pressure sensor data to obtain gas pressure value G; S2) Input gas mixing ratio R; S3) Input gas pressure sensitivity parameter S G ; S4) Input gas mixture ratio sensitivity parameter S R ; S5) Input discharge current sensitivity parameter S I ; S6) Input air pressure PID loop parameter GK p , G.K. i , G.K. d ; S7) Input gas mixture ratio PID loop parameter RK p , R.K. i , R.K. d ; S8) Input the discharge current PID loop parameter IK p , IK i , IK d ; and discharge current I; S9) Input target power value P D ; S10) Obtain the current laser output power value P O ; S11) calls the PID operator and performs the following calculations: Where e(t) is the cumulative error between the target power value and the actual output value. is the differential of the accumulated error, u i is the output value; when the steady state is reached, e(t)| t→∞ =P O -P D ; S12) u i Multiply it by the adjustment sensitivity K and output it to the discharge current regulator to achieve the target adjustment; S13) Repeat steps S10) to S12).

2. The method for adjusting the output power of a helium-neon laser of amblyopia treatment equipment according to claim 1, characterized in that: The gas pressure sensitivity parameter is derived from calibration.

3. The method for adjusting the output power of a helium-neon laser of amblyopia treatment equipment according to claim 1, characterized in that: The gas mixture ratio sensitivity parameter is derived from calibration.

4. The method for adjusting the output power of a helium-neon laser of amblyopia treatment equipment according to claim 1, characterized in that: The discharge current sensitivity parameter is derived from calibration.

5. The method for adjusting the output power of a helium-neon laser of amblyopia treatment equipment according to claim 1, characterized in that: The adjustment sensitivity described is derived from calibration.

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