Corneal contact lens cleaning control circuit and control method

Abstract

The invention belongs to the technical field of corneal contact lens cleaning, and discloses a corneal contact lens cleaning control circuit and control method. The cleaning control circuit comprises an electrode slice output circuit, and a power supply circuit, a current limiting circuit, a waveform control circuit and a monitoring circuit which are connected in series with the electrode slice output circuit, wherein the waveform control circuit and the monitoring circuit are in signal connection with a single chip microcomputer; the power supply circuit is used for supplying power to the electrode plate output circuit; the electrode plate output circuit comprises a pair of electrode plates and is used for introducing the modulated waveform into the cleaning liquid; the current-limiting circuit comprises a current-limiting resistor and is used for current-limiting protection of the electrode plate; the waveform control circuit is used for controlling output current waveforms at two ends of the electrode plate; the monitoring circuit is used for monitoring output voltage values and current values at the two ends of the control electrode plate. The cleaning fluid is introduced by modulating the preset waveform, the equipment is cleaned according to the preset program in cooperation with program setting, it can be guaranteed that the cleaning effect of each time is stable and consistent, it is guaranteed that the cleaning work is reliable, and the cleaning effect and the cleaning efficiency are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of corneal contact lens cleaning, and in particular relates to a corneal contact lens cleaning control circuit and a control method. Background Art

[0002] During the wearing process, corneal contact lenses will be contaminated by protein, lipid and other deposits in tears, which not only affect vision but may also cause eye discomfort. Similarly, corneal contact lenses are in direct contact with the cornea and are easily contaminated by microorganisms such as bacteria, viruses and fungi, which may cause eye infections. Therefore, cleaning and caring for corneal contact lenses are essential to the wearer's eye health.

[0003] The traditional cleaning method for corneal contact lenses is manual cleaning, which relies on manually scrubbing the lenses and using special cleaning solutions for rinsing and disinfection. It is difficult to completely remove tiny contaminants, and different users have different cleaning habits and strengths, so the cleaning effect is difficult to guarantee.

[0004] The prior patent application CN116300146A discloses a method for cleaning a contact lens, comprising the following steps: (1) placing the contact lens in a cleaning device, the cleaning device comprising an electrode and a cleaning solution; (2) cleaning the contact lens using microbubbles and hydroxyl radicals generated by electrolysis in the cleaning device. This patent uses electrical flotation and electrochemical hydroxyl oxidized water for cleaning, which has the advantages of good cleaning effect, low cost, and environmental protection. However, the cleaning method of the prior application cannot achieve precise control of various parameters of the electrode pulse voltage, making it difficult to achieve stable and consistent cleaning effects. During the cleaning process, equipment disconnection or short circuit failures are also prone to occur, affecting the cleaning work. Summary of the invention

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a corneal contact lens cleaning control circuit and control method. The cleaning control circuit modulates a preset waveform to introduce a cleaning liquid, and the program setting enables the cleaning device to perform cleaning according to the preset program, which can ensure that the cleaning effect is stable and consistent each time, and ensure that the cleaning work is reliable, avoid equipment open circuit or short circuit failure, and effectively improve the cleaning effect and cleaning efficiency.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A contact lens cleaning control circuit, the cleaning control circuit comprising an electrode output circuit, and a power supply circuit, a current limiting circuit, a waveform control circuit and a monitoring circuit connected in series with the electrode output circuit, the waveform control circuit and the monitoring circuit being connected to a single chip microcomputer signal;

[0008] The power supply circuit is used to supply power to the electrode sheet output circuit;

[0009] The electrode sheet output circuit includes a pair of electrode sheets for introducing the modulated waveform into the cleaning liquid;

[0010] The current limiting circuit includes a current limiting resistor, which is used for current limiting and protecting the electrode sheet;

[0011] The waveform control circuit is used to control the output current waveform at both ends of the electrode sheet;

[0012] The monitoring circuit is used to monitor and control the output voltage value and current value at both ends of the electrode sheet.

[0013] Furthermore, the power supply circuit includes a boost circuit, and the type of the boost circuit is a BOOST boost structure or a Buck-Boost boost structure;

[0014] The current limiting resistor of the current limiting circuit includes a first resistor and a second resistor, and the first resistor and the second resistor are respectively connected in series in the circuits on both sides of the electrode sheet;

[0015] The waveform control circuit includes a control signal and a switch tube connected in sequence, and the switch tube is connected in series with the second resistor of the current limiting circuit.

[0016] Furthermore, the switch tube is a MOSFET switch or a triode;

[0017] The single chip microcomputer controls the on and off of the switch tube through the control signal, and then controls whether there is current flowing through the two ends of the electrode sheet, thereby controlling the output current waveform at the two ends of the electrode sheet.

[0018] Further, the monitoring circuit includes a voltage detection signal and a sampling resistor;

[0019] The voltage detection signal enters the ADC of the single-chip microcomputer through the voltage-dividing resistor, and is used to monitor the output voltage of the power supply circuit in real time;

[0020] The sampling resistor is connected in series to the power supply circuit of the electrode sheet, and the sampling resistor is used to collect the current flowing through the two ends of the electrode sheet; during collection, the ADC of the microcontroller collects the voltage across the sampling resistor and converts it through a conversion formula, thereby realizing real-time monitoring of the current flowing through the two ends of the electrode sheet.

[0021] Furthermore, the monitoring circuit also includes a current detection signal;

[0022] The current detection signal is also connected in series to the power supply circuit of the electrode sheet to collect the current flowing through the two ends of the electrode sheet;

[0023] The single-chip microcomputer can collect the frequency and duty cycle of the electrode output by detecting the current detection signal flowing through the electrode to achieve closed-loop control. At the same time, the single-chip microcomputer judges the current size. If the current is too high, a short circuit prompt will be given; if the current is too low, a circuit break prompt will be given.

[0024] Furthermore, the monitoring circuit also includes a voltage-stabilizing diode, and the voltage-stabilizing diode is a Zener diode or a transient voltage suppressor diode.

[0025] At the same time, the present invention also provides a contact lens cleaning control method, which uses the contact lens cleaning control circuit as described in any one of the above items, and the cleaning control method includes two cleaning modes for selection: a standard cleaning mode and a deep cleaning mode, both of which are cleaning by a combination of electrical floating and electrochemical hydroxyl oxidized water, and the voltage applied to both ends of the electrode during cleaning is a preset square wave pulse voltage;

[0026] The control method of the standard cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; and repeat this cycle 5 times;

[0027] The control method of the deep cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; and repeat this cycle 10 times.

[0028] Further, the control method of the electrical float in the standard cleaning mode and the deep cleaning mode adopts: square wave pulse voltage, duty cycle of 0.1%-10%, frequency of 1kHz-5kHz, peak voltage of 10-25V;

[0029] The control methods of electrochemical hydroxyl oxidation water in the standard cleaning mode and the deep cleaning mode both adopt: square wave pulse voltage, duty cycle of 50%-90%, frequency of 5kHz-10kHz, peak voltage of 10-25V.

[0030] Furthermore, the control method of the electrical float in the standard cleaning mode and the deep cleaning mode adopts: square wave pulse voltage, duty cycle of 2% ± 1%, frequency of 4kHz ± 0.08kHz, peak voltage of 17 ± 2V;

[0031] The control methods of the electrochemical hydroxyl oxidation water in the standard cleaning mode and the deep cleaning mode both adopt: square wave pulse voltage, duty cycle of 50%-90%, frequency of 7kHz±0.14kHz, peak voltage of 17±2V.

[0032] Furthermore, in the standard cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidation of water is 70% ± 5%;

[0033] In the deep cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidation water is 80%±5%.

[0034] Furthermore, the control process of the square wave pulse voltage includes:

[0035] Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform;

[0036] Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency:

[0037] If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3;

[0038] If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3;

[0039] If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3;

[0040] Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle:

[0041] If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4;

[0042] If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4;

[0043] If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4;

[0044] Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage:

[0045] If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5;

[0046] If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5;

[0047] If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5;

[0048] Step S5: Monitor the current running time and compare it with the target running time:

[0049] If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2;

[0050] If the current running time has reached the set target running time, the process ends and waveform output stops.

[0051] Furthermore, the control process of the square wave pulse voltage includes:

[0052] Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform; in addition, setting an upper current threshold and a lower current threshold of a safety current;

[0053] Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency:

[0054] If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3;

[0055] If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3;

[0056] If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3;

[0057] Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle:

[0058] If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4;

[0059] If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4;

[0060] If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4;

[0061] Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage:

[0062] If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5;

[0063] If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5;

[0064] If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5;

[0065] Step S5: Monitor the current current of the output waveform and compare it with the upper current threshold and the lower current threshold of the safe current respectively:

[0066] If the current is greater than the upper current threshold, the device is judged to be short-circuited and an alarm is issued: device short-circuited;

[0067] If the current is less than the lower current threshold, the device is judged to be disconnected and an alarm is issued: the device is disconnected;

[0068] If the current lower limit threshold ≤ the current current ≤ the current lower limit threshold, the device is judged to be operating normally, and the process goes to the next step S6;

[0069] Step S6: Monitor the current running time and compare it with the target running time:

[0070] If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2;

[0071] If the current running time has reached the set target running time, the process ends and waveform output stops.

[0072] Compared with the prior art, the beneficial effects of the present invention are:

[0073] (1) The cleaning control circuit of the present invention can accurately control each circuit link through circuit structure design, thereby reducing the error caused by human operation; the cleaning control circuit modulates a preset waveform to introduce the cleaning liquid, and the program setting enables the cleaning device to clean according to the preset program, which can ensure that the cleaning effect is stable and consistent each time, and ensure that the cleaning work is reliable, avoid equipment disconnection or short circuit failure, and effectively improve the cleaning effect and cleaning efficiency;

[0074] (2) In the cleaning control method of the present invention, when the two cleaning methods of electrical flotation and electrochemical hydroxyl oxidation water are combined, the electrical flotation and electrochemical hydroxyl oxidation water use a square wave pulse voltage, the circuit structure is simplified, and the control is accurate and convenient; at the same time, the various parameters of the square wave pulse voltage corresponding to different cleaning methods are designed and optimized, which can further significantly improve the cleaning effect and cleaning efficiency;

[0075] (3) In the cleaning control method of the present invention, by setting the standard cleaning mode and the deep cleaning mode, when used under normal circumstances, only one cleaning mode is selected, and it can be flexibly operated according to different cleaning needs; at the same time, generally only the deep cleaning mode is used once within a period of time (such as within a week), and the standard cleaning mode can be used at other times, which can take into account both cleaning efficiency and cleaning effect;

[0076] (4) In the cleaning control method of the present invention, the single chip microcomputer determines the current size of the control circuit. If the current is too high, a short circuit prompt will be given; if the current is too low, a circuit break prompt will be given, which can effectively ensure the safety and reliability of the cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 This is a schematic diagram of a contact lens cleaning control circuit according to Embodiment 1 of the present invention;

[0078] Figure 2This is a flow chart of a contact lens cleaning control method according to Embodiment 2 of the present invention;

[0079] Figure 3 This is a flow chart of the control process of the square wave pulse voltage of Example 2 of the present invention;

[0080] Figure 4 This is a flow chart of the control process of the square wave pulse voltage of Example 3 of the present invention. DETAILED DESCRIPTION

[0081] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0082] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0083] Example 1

[0084] An embodiment of the present invention provides a corneal contact lens cleaning control circuit, which is used to control the voltage applied to both ends of the electrode during cleaning to be a preset square wave pulse voltage, and to achieve precise control of the square wave pulse voltage at both ends of the electrode, so that the corneal contact lens is cleaned according to a preset program, ensuring that the effect of each cleaning is stable and consistent, and improving the cleaning effect and cleaning efficiency.

[0085] like Figure 1 As shown, the cleaning control circuit includes an electrode output circuit, and a power supply circuit, a current limiting circuit, a waveform control circuit and a monitoring circuit connected in series with the electrode output circuit; the waveform control circuit and the monitoring circuit are connected to the single-chip microcomputer (not shown) by signal.

[0086] The power supply circuit is used to supply power to the electrode sheet output circuit; the electrode sheet output circuit includes a pair of electrode sheets 3, which are used to introduce the modulated waveform into the cleaning liquid; the current limiting circuit is used to limit the maximum current when the electrode sheet 3 is short-circuited, so as to prevent instantaneous large current from damaging the power supply circuit; the waveform control circuit is used to control the output current waveform at both ends of the electrode sheet 3; the monitoring circuit is used to monitor and control the output voltage value and current value at both ends of the electrode sheet 3.

[0087] Specifically, the power supply circuit includes a boost circuit, which boosts the voltage of a 3.7V lithium battery to 17V and then supplies power to a subsequent electrode sheet output circuit.

[0088] Furthermore, the type of the boost circuit is a BOOST boost structure or a Buck-Boost boost structure. In the embodiment of the present invention, the BOOST boost structure is taken as an example: first, the 3.7V lithium battery voltage is connected to the BOOST boost chip, and the switch tube inside the boost chip is periodically turned on and off, and cooperates with the energy storage inductor and diode in the external circuit to achieve voltage raising. At the same time, the boosted voltage is re-input into the boost chip through the feedback resistor. The boost chip dynamically adjusts the switching frequency of the switch tube according to the input voltage, changes the output voltage, and thus realizes voltage feedback control. Finally, after the 3.7V voltage is boosted to 17V, it enters the subsequent electrode sheet output circuit.

[0089] The current limiting circuit includes a current limiting resistor, which is connected in series to the electrode sheet output circuit to limit the maximum current when the electrode sheet is short-circuited to prevent instantaneous large current from damaging the power supply circuit.

[0090] Furthermore, the current limiting resistor specifically includes a first resistor 2 and a second resistor 4 , and the first resistor 2 and the second resistor 4 are respectively connected in series in the circuits on both sides of the electrode sheet 3 .

[0091] The waveform control circuit includes a control signal 6 and a switch tube connected in sequence, and the switch tube is connected in series with the second resistor 4 in the current limiting resistor of the current limiting circuit.

[0092] In an embodiment of the present invention, the switch tube is a MOSFET switch 5. In some other embodiments, the switch tube can also be replaced by a triode; the single chip microcomputer controls the conduction and disconnection of the MOSFET switch 5 through a control signal 6, and then controls whether there is current flowing through the two ends of the electrode sheet 3, thereby controlling the output current waveform at the two ends of the electrode sheet 3.

[0093] The monitoring circuit includes a voltage detection signal 1, a current detection signal 7 and a sampling resistor 9. The voltage detection signal 1 enters the ADC (analog-to-digital converter) of the single-chip microcomputer through a voltage divider resistor, and is used to monitor the output voltage (17V voltage) of the power supply circuit in real time; the sampling resistor 9 is connected in series to the power supply circuit of the electrode sheet 3, one end of the sampling resistor 9 is grounded, and the other end is connected in series with the MOSFET switch 5 of the waveform control circuit, and the sampling resistor is used to collect the current flowing through the two ends of the electrode sheet 3; during collection, the ADC of the single-chip microcomputer collects the voltage across the sampling resistor 9, and converts it through a conversion formula, thereby realizing real-time monitoring of the current flowing through the two ends of the electrode sheet 3, wherein the conversion formula is:

[0094] I=U / R (1)

[0095] In the above formula (1), I is the current flowing through the two ends of the electrode sheet; U is the voltage of the sampling resistor collected by the ADC of the single chip microcomputer; and R is the resistance value of the sampling resistor.

[0096] The current detection signal 7 is also connected in series to the power supply circuit of the electrode sheet 3, and is used to collect the current flowing through the two ends of the electrode sheet 3. The single-chip microcomputer can collect the frequency and duty cycle output by the electrode sheet 3 by detecting the current detection signal 7 flowing through the electrode sheet 3 to achieve closed-loop control. At the same time, the single-chip microcomputer judges the current size. If the current is too high, a short circuit prompt will be given; if the current is too low, a circuit break prompt will be given.

[0097] Furthermore, the monitoring circuit further includes a voltage stabilizing diode, which is a Zener diode 8 or a transient voltage suppressor diode (TVS), and in the embodiment of the present invention, a Zener diode 8 is specifically selected. The Zener diode 8 is connected in parallel to the monitoring circuit to clamp the excessive voltage generated on the sampling resistor 9 when a short circuit occurs at both ends of the electrode sheet 3, thereby achieving the purpose of protecting the ADC of the single-chip microcomputer.

[0098] The cleaning control circuit of the embodiment of the present invention can accurately control each circuit link through circuit structure design, reduce the error caused by human operation, enable the cleaning equipment to clean according to the preset program, ensure the stable and consistent effect of each cleaning, and ensure the reliability of the cleaning work, avoid equipment open circuit or short circuit failure, and further improve the cleaning effect and cleaning efficiency.

[0099] Example 2

[0100] The embodiment of the present invention provides a contact lens cleaning control method, such as Figure 2 As shown, there are two cleaning modes to choose from: standard cleaning mode and deep cleaning mode. Both cleaning modes are a combination of electrical flotation and electrochemical hydroxyl oxidation water cleaning. During cleaning, the voltage applied to both ends of the electrode is a preset square wave pulse voltage, where:

[0101] The control method of the standard cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; repeat this cycle 5 times;

[0102] The control method of the deep cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; and repeat this cycle 10 times.

[0103] Furthermore, the control methods of the electrical float in the standard cleaning mode and the deep cleaning mode are both: square wave pulse voltage, duty cycle of 0.1%-10%, preferably 2%±1%; frequency of 1kHz-5kHz, preferably 4kHz±0.08kHz; peak voltage of 10-25V, preferably 17±2V;

[0104] The control methods for electrochemical hydroxyl oxidation water in the standard cleaning mode and the deep cleaning mode both adopt: square wave pulse voltage, duty cycle of 50%-90%; frequency of 5kHz-10kHz, preferably 7kHz±0.14kHz; peak voltage of 10-25V, preferably 17±2V.

[0105] Preferably, in the standard cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidized water is 70%±5%; in the deep cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidized water is 80%±5%.

[0106] When used under normal circumstances, only one cleaning mode needs to be selected, which can be flexibly operated according to different cleaning needs; at the same time, the deep cleaning mode is generally only used once within a period of time (such as within a week), and the standard cleaning mode can be used at other times, which can take into account both cleaning efficiency and cleaning effect.

[0107] like Figure 3 The figure shows a control flow chart of the square wave pulse voltage used in the cleaning process, including the monitoring and control of the frequency, duty cycle and output voltage of the output waveform to generate a preset square wave pulse voltage; in addition, it also includes the control of the target operating time corresponding to the target output waveform to enable it to run according to the set time program.

[0108] The control process of the square wave pulse voltage includes:

[0109] Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform;

[0110] Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency:

[0111] If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3;

[0112] If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3;

[0113] If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3;

[0114] Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle:

[0115] If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4;

[0116] If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4;

[0117] If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4;

[0118] Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage:

[0119] If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5;

[0120] If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5;

[0121] If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5;

[0122] Step S5: Monitor the current running time and compare it with the target running time:

[0123] If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2;

[0124] If the current running time has reached the set target running time, the process ends and waveform output stops.

[0125] Example 3

[0126] The embodiment of the present invention further improves the square wave pulse voltage control process in embodiment 2:

[0127] The square wave pulse voltage control of the embodiment of the present invention also includes monitoring the output current, thereby giving an alarm for equipment short circuit or open circuit failure, ensuring that the cleaning work is safe and reliable.

[0128] The improved control process of the square wave pulse voltage includes:

[0129] Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform; in addition, setting an upper current threshold and a lower current threshold of a safety current;

[0130] Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency:

[0131] If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3;

[0132] If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3;

[0133] If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3;

[0134] Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle:

[0135] If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4;

[0136] If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4;

[0137] If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4;

[0138] Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage:

[0139] If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5;

[0140] If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5;

[0141] If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5;

[0142] Step S5: Monitor the current current of the output waveform and compare it with the upper current threshold and the lower current threshold of the safe current respectively:

[0143] If the current is greater than the upper current threshold, the device is judged to be short-circuited and an alarm is issued: device short-circuited;

[0144] If the current is less than the lower current threshold, the device is judged to be disconnected and an alarm is issued: the device is disconnected;

[0145] If the current lower limit threshold ≤ the current current ≤ the current lower limit threshold, the device is judged to be operating normally, and the process goes to the next step S6;

[0146] Step S6: Monitor the current running time and compare it with the target running time:

[0147] If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2;

[0148] If the current running time has reached the set target running time, the process ends and waveform output stops.

[0149] The embodiment of the present invention determines the current size of the control circuit through a single chip microcomputer. If the current is too high, a short circuit prompt will be given; if the current is too low, a circuit break prompt will be given, which can effectively ensure the safety and reliability of the cleaning work.

[0150] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the application scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A contact lens cleaning control circuit, characterized in that: The cleaning control circuit includes an electrode output circuit, and a power supply circuit, a current limiting circuit, a waveform control circuit and a monitoring circuit connected in series with the electrode output circuit, and the waveform control circuit and the monitoring circuit are connected to the single chip microcomputer signal; The power supply circuit is used to supply power to the electrode sheet output circuit; The electrode sheet output circuit includes a pair of electrode sheets for introducing the modulated waveform into the cleaning liquid; The current limiting circuit includes a current limiting resistor, which is used for current limiting and protecting the electrode sheet; The waveform control circuit is used to control the output current waveform at both ends of the electrode sheet; The monitoring circuit is used to monitor and control the output voltage value and current value at both ends of the electrode sheet.

2. The contact lens cleaning control circuit according to claim 1, characterized in that: The power supply circuit includes a boost circuit, and the type of the boost circuit is a BOOST boost structure or a Buck-Boost boost structure; The current limiting resistor of the current limiting circuit includes a first resistor and a second resistor, and the first resistor and the second resistor are respectively connected in series in the circuits on both sides of the electrode sheet; The waveform control circuit includes a control signal and a switch tube connected in sequence, and the switch tube is connected in series with the second resistor of the current limiting circuit.

3. The contact lens cleaning control circuit according to claim 2, characterized in that: The switch tube is a MOSFET switch or a triode; The single chip microcomputer controls the on and off of the switch tube through the control signal, and then controls whether there is current flowing through the two ends of the electrode sheet, thereby controlling the output current waveform at the two ends of the electrode sheet.

4. The contact lens cleaning control circuit according to claim 1, characterized in that: The monitoring circuit includes a voltage detection signal and a sampling resistor; The voltage detection signal enters the ADC of the single-chip microcomputer through the voltage-dividing resistor, and is used to monitor the output voltage of the power supply circuit in real time; The sampling resistor is connected in series to the power supply circuit of the electrode sheet, and the sampling resistor is used to collect the current flowing through the two ends of the electrode sheet; during collection, the ADC of the microcontroller collects the voltage across the sampling resistor and converts it through a conversion formula, thereby realizing real-time monitoring of the current flowing through the two ends of the electrode sheet.

5. The contact lens cleaning control circuit according to claim 4, characterized in that: The monitoring circuit also includes a current detection signal; The current detection signal is also connected in series to the power supply circuit of the electrode sheet to collect the current flowing through the two ends of the electrode sheet; The single-chip microcomputer can collect the frequency and duty cycle of the electrode output by detecting the current detection signal flowing through the electrode to achieve closed-loop control. At the same time, the single-chip microcomputer judges the current size. If the current is too high, a short circuit prompt will be given; if the current is too low, a circuit break prompt will be given.

6. The contact lens cleaning control circuit according to claim 5, characterized in that: The monitoring circuit also includes a voltage-stabilizing diode, which is a Zener diode or a transient suppression diode.

7. A contact lens cleaning control method, using the contact lens cleaning control circuit according to any one of claims 1 to 6, characterized in that: The cleaning control method includes two cleaning modes for selection: a standard cleaning mode and a deep cleaning mode. Both cleaning modes are cleaning by a combination of electrical flotation and electrochemical hydroxyl oxidation water. During cleaning, the voltage applied to both ends of the electrode is a preset square wave pulse voltage. The control method of the standard cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; and repeat this cycle 5 times; The control method of the deep cleaning mode is: first perform electrical floating work for 30±0.6 seconds, then perform electrochemical hydroxyl oxidation water work for 60±1.2 seconds; and repeat this cycle 10 times.

8. The contact lens cleaning control method according to claim 7, characterized in that: The control method of electrical floating in the standard cleaning mode and the deep cleaning mode adopts: square wave pulse voltage, duty cycle of 0.1%-10%, frequency of 1kHz-5kHz, peak voltage of 10-25V; The control methods of electrochemical hydroxyl oxidation water in the standard cleaning mode and the deep cleaning mode both adopt: square wave pulse voltage, duty cycle of 50%-90%, frequency of 5kHz-10kHz, peak voltage of 10-25V.

9. The contact lens cleaning control method according to claim 8, characterized in that: The control method of electrical floating in the standard cleaning mode and the deep cleaning mode adopts: square wave pulse voltage, duty cycle is 2%±1%, frequency is 4kHz±0.08kHz, peak voltage is 17±2V; The control methods of the electrochemical hydroxyl oxidation water in the standard cleaning mode and the deep cleaning mode both adopt: square wave pulse voltage, duty cycle of 50%-90%, frequency of 7kHz±0.14kHz, peak voltage of 17±2V.

10. The contact lens cleaning control method according to claim 9, characterized in that: In the standard cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidation water is 70% ± 5%; In the deep cleaning mode, the duty cycle of the square wave pulse voltage corresponding to the electrochemical hydroxyl oxidation water is 80%±5%.

11. The contact lens cleaning control method according to claim 7, characterized in that: The control process of the square wave pulse voltage includes: Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform; Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency: If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3; If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3; If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3; Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle: If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4; If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4; If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4; Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage: If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5; If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5; If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5; Step S5: Monitor the current running time and compare it with the target running time: If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2; If the current running time has reached the set target running time, the process ends and waveform output stops.

12. The contact lens cleaning control method according to claim 7, characterized in that: The control process of the square wave pulse voltage includes: Step S1: setting a target frequency, a target duty cycle, a target output voltage and a target operating time of a target output waveform; in addition, setting an upper current threshold and a lower current threshold of a safety current; Step S2: Monitor the current frequency of the output waveform and compare it with the target frequency: If the current frequency is greater than the target frequency, the current frequency is reduced and the process proceeds to the next step S3; If the current frequency is less than the target frequency, the current frequency is increased and the process proceeds to the next step S3; If the current frequency is equal to the target frequency, the current frequency is maintained and the process proceeds to the next step S3; Step S3: Monitor the current duty cycle of the output waveform and compare it with the target duty cycle: If the current duty cycle is greater than the target duty cycle, the current duty cycle is reduced and the process proceeds to the next step S4; If the current duty cycle is less than the target duty cycle, the current duty cycle is increased and the process proceeds to the next step S4; If the current duty cycle is equal to the target duty cycle, the current duty cycle is maintained and the process proceeds to the next step S4; Step S4: Monitor the current voltage of the output waveform and compare it with the target voltage: If the current voltage is greater than the target voltage, the current voltage is reduced and the process proceeds to the next step S5; If the current voltage is less than the target voltage, the current voltage is increased and the process proceeds to the next step S5; If the current voltage is equal to the target voltage, the current voltage is maintained and the process proceeds to the next step S5; Step S5: Monitor the current current of the output waveform and compare it with the upper current threshold and the lower current threshold of the safe current respectively: If the current current is greater than the upper current threshold, the device is judged to be short-circuited and an alarm is triggered: device short-circuited; if the current current is less than the lower current threshold, the device is judged to be open-circuited and an alarm is triggered: device open-circuited; If the current lower limit threshold ≤ the current current ≤ the current lower limit threshold, the device is judged to be operating normally, and the process goes to the next step S6; Step S6: Monitor the current running time and compare it with the target running time: If the current running time does not reach the set target running time, the monitoring control continues and the process goes to step S2; If the current running time has reached the set target running time, the process ends and waveform output stops.

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