CN114681202B - Darkness control system and method of automatic light-changing filter for welding mask - Google Patents
Darkness control system and method of automatic light-changing filter for welding mask Download PDFInfo
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- CN114681202B CN114681202B CN202210618366.XA CN202210618366A CN114681202B CN 114681202 B CN114681202 B CN 114681202B CN 202210618366 A CN202210618366 A CN 202210618366A CN 114681202 B CN114681202 B CN 114681202B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
- A61F9/06—Masks, shields or hoods for welders
- A61F9/065—Masks, shields or hoods for welders use of particular optical filters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a darkness control system and method of an automatic light-changing filter for a welding mask, belonging to the technical field of electric welding protection and comprising the following steps: step 1, collecting working condition data; step 2, simulating a control process by a discretization ladder combination method, and calculating and expanding n darkness ladders according to a working condition welding equivalent value Q; step 3, calculating the acquired working condition data and the welding equivalent value Q, and generating a darkness control sequence according to the preset brightness opening time delta T; step 4, outputting the darkness control sequence to the LCD in sequence; the darkness control system and the darkness control method of the automatic light-changing filter for the welding mask reduce the implementation difficulty, thereby reducing the cost and the power consumption, automatically calculate and expand n darkness steps according to the welding equivalent value Q under the working conditions, and realize the automatic control and application by a system control program without manual adjustment under different working conditions.
Description
Technical Field
The invention belongs to the technical field of electric welding protection, and particularly relates to a darkness control system and method of an automatic light-changing filter for a welding mask.
Background
In the operations of welding, smelting, glass, ceramics, mechanical heat processing and the like, production workers often contact heat sources such as a high-temperature furnace and the like, the temperature is generally 1050-2150 ℃, the corresponding middle-short infrared band of heat radiation is 0.78-3 microns, and infrared rays accounting for more than 70 percent and a large amount of visible light and ultraviolet rays can be generated at the temperature; ultraviolet rays generated by electric welding can cause damage to cornea and conjunctiva tissues of eyes by short-time irradiation of the eyes, particularly the most serious ultraviolet rays with 28nm light; the generated strong infrared rays easily cause eye crystal turbidity; the goggles for electric welding can well block the infrared rays and the ultraviolet rays; the lens is based on optical glass, adopts colorants such as ferric oxide, cobalt oxide, chromium oxide and the like, and is added with a certain amount of cerium oxide to increase the absorption of ultraviolet rays; the appearance is green or yellow-green; can completely block ultraviolet rays, has infrared transmittance of less than 5 percent and visible light transmittance of about 0.1 percent;
typical goggles are non-variable, for variable filters are typically used during welding, while in post-weld observation, typically only a simple delay in weld protection darkness is provided, fixing the setting of the darkness; the temperature of a high-temperature welding pool and the change of the light intensity are not flexibly adapted;
the typical darkness pattern of the welding process is shown in fig. 1, except for the limited delay of the lowest darkness after welding, the rate of change from dark state to light state is steep at other stages requiring protection, and most of the time after welding has no protection.
An ideal continuous darkness mode after welding is shown in fig. 2, the implementation is complex, the detection and calculation of software and hardware are increased, the complexity is improved, more manual interface input configurations are included, the cost and the power consumption are increased, and no practical value is realized;
therefore, there is a need to develop a darkness control system and method for an automatic dimming filter for a welding mask to solve the existing problems.
Disclosure of Invention
The invention aims to provide a darkness control system and a darkness control method of an automatic dimming filter for a welding mask, and aims to solve the problem that the dimming filter cannot automatically realize darkness control.
In order to achieve the purpose, the invention provides the following technical scheme: a darkness control method of an automatic light-changing filter for a welding mask comprises the following steps:
and 4, sequentially outputting the darkness control sequence to the LCD.
Preferably, in step 1, the method for detecting the protection initiation signal includes: when detecting welding arc light, when entering welding operation, through collecting welding process operating mode data, calculate behind welding equivalent value Q and convert to automatic darkness setting.
Preferably, the discretization ladder combination method analog control method includes:
the darkness shadow X1 of the dark state described at the arc extinguishing time of the darkness after welding is completed is in a sequence between darkness shadow Xn of a normal bright state along with gradual reduction of welding temperature, wherein shadow Xn refers to the darkness value of the ith stage, and delta Ti refers to the corresponding darkness value maintaining time:
shadeX1，⊿T1
shadeX2，⊿T2
......
shadeXi，⊿Ti
......
shadeXn，⊿Tn。
preferably, the step of calculating the welding equivalent value Q is as follows:
reading a shadow X1 of the welding protection darkness parameter of the current work through a welding protection starting signal every time when a welding protection working flow is entered;
a timestamp T0 into the weld protection workflow;
a timestamp T1 of exit from the weld protection workflow;
calculating the welding equivalent: q = shadeX1 (T1-T0).
Preferably, the discretized darkness gradient parameter combination generated by said welding equivalent Q and said specified opening time Δ T, the output data sequence from dark to light states being as follows:
{ darkness level, time setting } = { { shadeux 1, Δ T1}, { shadeux 2, Δ T2}, }; and realizing automatic step control of the brightness opening process by outputting the { shade xi, delta Ti } of the data sequence.
Preferably, in step 3, the step of generating the darkness control sequence includes: inputting the shade, sensitivity and delay parameter setting, and setting delayMax as the maximum delay value of the normal setting mode;
entering a delay automatic control mode, wherein delay is configured in the delay parameter setting and is greater than delay Max;
when welding arc light occurs, entering a welding working mode, and collecting working parameters including a current darkness value shadow X1 and a welding starting time stamp T0;
after welding is finished, recording a timestamp T1 when the welding working mode exits, and acquiring a control time delta T of a preset brightness opening process of a delay automatic control mode;
calculating the equivalent value Q of the current welding, generating a darkness step control sequence according to the brightness opening time delta T, and generating the number n of the sequence according to the numerical value of the welding equivalent value Q.
Preferably, the condition data collection includes capturing an optical signal by a photosensor assembly mounted on the filter.
Preferably, the photosensor assembly includes a first photosensor, a second photosensor, a third photosensor, and a fourth photosensor;
the first photoelectric sensor and the second photoelectric sensor are distributed above the LCD in the same straight line, the distance between the lower end surface of the first photoelectric sensor and the upper end surface of the LCD is 1/10 of the height of the LCD, and the distance between the first photoelectric sensor and the second photoelectric sensor is 4/5 of the width of the LCD; a third photoelectric sensor and a fourth photoelectric sensor which are distributed in the same straight line are arranged below the LCD, the distance between the third photoelectric sensor and the fourth photoelectric sensor is 1/2 of the width of the LCD, and the distance between the upper end surfaces of the third photoelectric sensor and the fourth photoelectric sensor and the lower end surface of the LCD is 1/10 of the height of the LCD;
preferably, a solar panel is arranged above the first photoelectric sensor and the second photoelectric sensor and connected with the control circuit.
The invention also provides a darkness control system of an automatic light-changing filter for a welding mask, comprising:
the input module is used for inputting darkness shade, sensitivity and delay parameters;
a photosensor assembly for detecting a light signal and converting it into an electrical signal;
the welding detection judging circuit is connected with the photoelectric sensor assembly and is used for detecting and judging welding operation;
the display module is used for displaying the configuration of working parameters required by welding an automatic light-changing product and realizing man-machine interaction by matching with the input module, and the LCD is used for changing bright and dark states to protect welding; the LCD driving circuit is used for receiving the voltage required by converting the output signal into the LCD and realizing the bright and dark states of the LCD;
and the control circuit is connected with the input module, the welding detection judging circuit, the display module and the LCD driving circuit and is used for processing input configuration signals and output display processing, calculating and controlling welding photoelectric detection signals and sending output control signals to the LCD driving circuit.
The invention has the technical effects and advantages that: the darkness control system and the darkness control method of the automatic light changing filter for the welding mask reduce implementation difficulty, thereby reducing cost and power consumption, automatically calculating and expanding n darkness steps according to a working condition welding equivalent value Q, realizing no manual adjustment under different working conditions, automatically controlling and applying by a system control program, realizing multi-azimuth acquisition of optical signals through structural position improvement of a first photoelectric sensor, a second photoelectric sensor, a third photoelectric sensor and a fourth photoelectric sensor, improving accuracy of optical signal acquisition, matching the improvement with a darkness control method, and improving accuracy of automatic control through accurate acquisition of a working condition numerical value.
Drawings
FIG. 1 is a schematic diagram of a darkness model of a prior art welding process of the present invention;
FIG. 2 is a schematic view of a continuous darkness pattern after welding according to the present invention;
FIG. 3 is a schematic view of a darkness model of the welding process of the present invention;
FIG. 4 is a schematic diagram of the automatic setting process of darkness after welding according to an embodiment of the present invention;
FIG. 5 is a block diagram of the apparatus of the present invention;
FIG. 6 is a flow chart of the present invention;
fig. 7 is a schematic view of the mounting structure of the photosensor assembly of the present invention.
In the figure: 1. an input module; 2. a control circuit; 3. a solar panel; 4. a display module; 5. an LCD drive circuit; 6. an LCD; 71. a first photosensor; 72. a second photosensor; 73. a third photosensor; 74. and a fourth photosensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a darkness control method of an automatic light-changing filter for a welding mask as shown in fig. 6, which comprises the following steps:
the method comprises the following steps:
the first photoelectric sensor 71 and the second photoelectric sensor 72 are distributed above the LCD6 in the same straight line, the distance between the lower end surface of the first photoelectric sensor 71 and the upper end surface of the LCD6 is 1/10 of the height of the LCD6, and the distance between the first photoelectric sensor 71 and the second photoelectric sensor 72 is 4/5 of the width of the LCD 6; a third photoelectric sensor 73 and a fourth photoelectric sensor 74 which are distributed in the same straight line are arranged below the LCD6, the distance between the third photoelectric sensor 73 and the fourth photoelectric sensor 74 is 1/2 of the width of the LCD6, and the distance between the upper end surfaces of the third photoelectric sensor 73 and the fourth photoelectric sensor 74 and the lower end surface of the LCD6 is 1/10 of the height of the LCD 6;
it should be noted that the solar panel 3 is arranged above the first photoelectric sensor 71 and the second photoelectric sensor 72, and the solar panel 3 is connected with the control circuit 2, so that electric energy is provided, the light weight is realized, and the load sense during head wearing is reduced;
in this embodiment, in the darkness control process after welding, except for one darkness value in the optional delay period, n darkness steps are automatically calculated and expanded according to the working condition welding equivalent value Q, where n > =1, and in different working conditions, manual adjustment is not needed, and the darkness control process is automatically controlled and applied by a system control program;
in the embodiment, only the parameter delay needs to be set normally, and other parameter configurations and facilities thereof are not introduced, in the delay configuration, delayN (delayN > delayMax) is used for setting to enter the delay automatic control mode, and the delayN is assigned to a switch for automatically setting the enabling of the darkness after welding, and other configurations are not needed; in an automatic control mode, a system control program collects and calculates working condition data and a welding equivalent value Q, and a darkness control sequence is generated according to preset brightness opening time delta T; the system control program sequentially outputs the darkness control sequence to the LCD driving circuit 5 to generate a brightness opening process required after welding of the LCD 6;
the method reduces the implementation difficulty by simulating an ideal process by a discretization ladder combination method, thereby reducing the cost and the power consumption, and can be implemented in an engineering way, and the method comprises the following specific steps: when the darkness after completion of the weld is as described in the dark-state darkness shadow x1 at arc off time of fig. 2, with a gradual decrease of the welding temperature, to a sequence between the darkness shadow xn of the normal bright state, where shadow xi refers to the darkness value of the i-th phase, Δ Ti refers to the corresponding darkness value maintenance time:
shadeX1，⊿T1；
shadeX2，⊿T2；
......
shadeXi，⊿Ti；
......
shadeXn，⊿Tn；
the discrete process change is shown in fig. 3, and as the number n of gradients increases, the closer to the ideal continuous curve is shown in fig. 2;
besides normal welding protection parameter setting, more workers and interface setting are not introduced, and inference and automatic setting adjustment are carried out by collecting working condition data of the welding process, so that the discretized approximate simulation ideal continuous process is realized. Outputting a discretized gradient set after welding;
the welding equivalent value Q is calculated as follows:
reading a shadow X1 of the welding protection darkness parameter of the current work through a welding protection starting signal every time when a welding protection working flow is entered;
a timestamp T0 of entering the weld protection workflow;
a timestamp T1 of exiting the weld protection workflow;
calculating the welding equivalent: q = shadeX1 (T1-T0);
the opening process of the LCD6 from dark to light state is a discretized darkness gradient parameter combination generated by the welding equivalent Q and the specified opening time Δ T, the output data sequence being as follows:
{ darkness level, time setting } = { { shadeux 1, Δ T1}, { shadeux 2, Δ T2}, }
A system control program controls the LCD driving circuit 5 through the { shade xi, delta Ti } of the sequence to realize automatic step control in the brightness opening process;
in this embodiment, the input module 1 is used to complete the setting of the parameters, such as shade, sensitivity, delay, etc., required for welding, where delayMax is the maximum value of delay in the normal setting mode;
entering a delay automatic control mode, wherein delay configured in the delay parameter setting is greater than delay Max;
when welding arc light occurs, entering a welding working mode, and collecting working parameters including a current darkness value shadow X1 and a welding starting time stamp T0;
after welding is finished, recording a timestamp T1 when the welding working mode exits, and acquiring a control time delta T of a preset brightness opening process of a delay automatic control mode;
calculating an equivalent value Q of the current welding, and generating a darkness step control sequence according to the brightness opening time delta T, wherein the number n of the sequence is determined by the size of the welding equivalent value Q;
and the darkness control sequence is sequentially output to the component LCD driving circuit 5 through a system control program to complete the automatic gradient control of the brightness opening process.
The invention also provides a darkness control system of an automatic light-changing filter for a welding mask, which is shown in fig. 5: the method comprises the following steps:
the input module 1 is used for inputting darkness shadow, sensitivity and delay parameters;
a photosensor assembly for detecting a light signal and converting it into an electrical signal; the embodiment is not limited to the devices such as the photoresistor or the diode;
the welding detection judging circuit is connected with the photoelectric sensor assembly and is used for detecting and judging welding operation;
the display module 4 is used for displaying the configuration of working parameters required by welding an automatic light-changing product, is matched with the input module 1 to realize human-computer interaction, and is not limited to modes of an indicator lamp, a liquid crystal display screen and the like or a combination of the modes;
LCD6 for bright and dark state change protection welding; the welding LCD6 is a welding protection LCD liquid crystal screen, and is controlled by the LCD driving circuit 5 to realize bright and dark states and complete the arc light protection function;
the LCD driving circuit 5 is used for receiving the voltage required by the output signal conversion LCD6 and realizing the bright and dark states of the LCD 6;
and the control circuit 2 is connected with the input module 1, the welding detection judging circuit, the display module 4 and the LCD driving circuit 5 and is used for processing input configuration signals and output display processing, calculating and controlling welding photoelectric detection signals and sending output control signals to the LCD driving circuit 5.
The darkness control system and the darkness control method of the automatic light changing filter for the welding mask reduce implementation difficulty, thereby reducing cost and power consumption, automatically calculating and expanding n darkness steps according to a working condition welding equivalent value Q, realizing no manual adjustment under different working conditions, automatically controlling and applying by a system control program, realizing multi-azimuth acquisition of optical signals through structural position improvement of the first photoelectric sensor 71, the second photoelectric sensor 72, the third photoelectric sensor 73 and the fourth photoelectric sensor 74, improving accuracy of optical signal acquisition, matching the improvement with a darkness control method, and improving accuracy of automatic control through accurate acquisition of numerical values of the working conditions.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A darkness control method of an automatic light-changing filter for a welding mask is characterized in that: the method comprises the following steps:
step 1, collecting working condition data, reading a welding protection darkness parameter shadow X1 of current work when a protection starting signal is detected, entering a timestamp T0 of a welding protection working flow, and extinguishing a welding arc to exit a timestamp T1 of the welding protection working flow;
step 2, calculating a welding equivalent value Q corresponding to the acquired working condition data, and carrying out normalization processing; simulating a continuous curve process of darkness change by a discretization finite step combination method, and calculating the number n of darkness steps required currently according to a working condition welding equivalent value Q;
step 3, generating a darkness control sequence according to the number n of darkness steps and a preset brightness opening time delta T;
step 4, outputting the darkness control sequence to the LCD in sequence;
in step 1, the method for detecting the protection start signal includes: detecting when the welding arc lights; the welding equivalent value Q is calculated as follows:
entering a welding protection working flow, and reading a welding protection darkness parameter shadow X1 of the current work through a welding protection starting signal;
a timestamp T0 into the weld protection workflow;
a timestamp T1 of exit from the weld protection workflow;
calculating the welding equivalent: q = shadeX1 (T1-T0).
2. The darkness control method of an automatic darkening filter for a welding mask, according to claim 1, characterized in that: the analog control method of the discretization ladder combination method comprises the following steps:
darkness shadow x1 of dark states described at the arc extinction time of darkness after completion of welding, as the welding temperature gradually decreases, to a sequence between darkness shadow xn of normal bright states, where shadow xi refers to the darkness value of the i-th stage thereof, Δ Ti refers to the corresponding darkness value maintaining time:
shadeX1，⊿T1
shadeX2，⊿T2
......
shadeXi，⊿Ti
......
shadeXn，⊿Tn。
3. the darkness control method of an automatic darkening filter for a welding mask, according to claim 1, characterized in that: the discretized darkness gradient parameter combination generated by said welding equivalent Q and the specified opening time Δ T, the output data sequence from dark to light state is as follows:
{ darkness level, time setting } = { { shadeux 1, Δ T1}, { shadeux 2, Δ T2}, }; and realizing automatic step control of the brightness opening process by outputting the { shade xi, delta Ti } of the data sequence.
4. The darkness control method of an automatic light-changing filter for welding helmets, according to claim 1, characterized in that: in step 3, the step of generating the darkness control sequence includes: inputting the settings of the shade, sensitivity and delay parameters, and setting delayMax to be the maximum delay value of the normal setting mode;
entering a delay automatic control mode, wherein delay is configured in the delay parameter setting and is greater than delay Max;
when welding arc light occurs, entering a welding working mode, and collecting working parameters including a current darkness value shadow X1 and a welding starting time stamp T0;
after welding is finished, recording a timestamp T1 when the welding working mode exits, and acquiring control time delta T of a preset brightness opening process of the delay automatic control mode;
calculating the equivalent value Q of the current welding, generating a darkness step control sequence according to the brightness opening time delta T, and generating the number n of the sequence according to the numerical value of the welding equivalent value Q.
5. The darkness control method of an automatic darkening filter for a welding mask, according to claim 1, characterized in that: the condition data collection includes capturing an optical signal with a photosensor assembly mounted on the filter.
6. The darkness control method of an automatic light-changing filter for a welding mask according to claim 5, characterized in that: the photoelectric sensor assembly comprises a first photoelectric sensor, a second photoelectric sensor, a third photoelectric sensor and a fourth photoelectric sensor;
the first photoelectric sensor and the second photoelectric sensor are distributed above the LCD in the same straight line, the distance between the lower end surface of the first photoelectric sensor and the upper end surface of the LCD is 1/10 of the height of the LCD, and the distance between the first photoelectric sensor and the second photoelectric sensor is 4/5 of the width of the LCD; the below setting of LCD is the third photoelectric sensor, the fourth photoelectric sensor of same straight line distribution, the interval of third photoelectric sensor and fourth photoelectric sensor is 1/2 of LCD width, just the interval of up end and the LCD lower extreme face of third photoelectric sensor and fourth photoelectric sensor is 1/10 of LCD height.
7. The darkness control method of an automatic light-changing filter for welding helmets, according to claim 6, characterized in that: and a solar panel is arranged above the first photoelectric sensor and the second photoelectric sensor and is connected with the control circuit.
8. A darkness control system for implementing a darkness control method of an automatic light-changing filter for a welding helmet according to claim 1, characterized in that: the method comprises the following steps:
the input module is used for inputting darkness shade, sensitivity and delay parameters;
the photoelectric sensor assembly is used for detecting optical signals and converting the optical signals into electric signals;
the welding detection judging circuit is connected with the photoelectric sensor assembly and is used for detecting and judging welding operation;
the display module is used for displaying the configuration of the working parameters required by welding the automatic light-changing products and is matched with the input module to realize human-computer interaction,
the LCD is used for the protection welding of the change of bright and dark states;
the LCD driving circuit is used for receiving the voltage required by the output signal conversion LCD and realizing the bright and dark states of the LCD;
and the control circuit is connected with the input module, the welding detection judging circuit, the display module and the LCD driving circuit and is used for processing input configuration signals and output display processing, calculating and controlling welding photoelectric detection signals and sending output control signals to the LCD driving circuit.
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| CN202210618366.XA CN114681202B (en) | 2022-06-02 | 2022-06-02 | Darkness control system and method of automatic light-changing filter for welding mask |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH687809A5 (en) * | 1993-05-14 | 1997-02-28 | Xelux Holding Ag | Anti-glare device. |
| JPH07194646A (en) * | 1993-12-31 | 1995-08-01 | Three Tec Deibisu:Kk | Liquid crystal weld mask |
| US8181270B2 (en) * | 2005-09-09 | 2012-05-22 | Optrel Ag | Anti-glare protection device |
| CN201139682Y (en) * | 2007-11-09 | 2008-10-29 | 中原工学院 | Microcontroller controlled eye protector for welder automatically changing light |
| CN104116590A (en) * | 2013-04-27 | 2014-10-29 | 李骥超 | Circuit implementation method used for lens group dimming control in welding mask |
| EP2799046A1 (en) * | 2013-04-30 | 2014-11-05 | Optrel Ag | Device and method for dazzle protection |
| US10251786B2 (en) * | 2013-11-21 | 2019-04-09 | Optrel Holding AG | Method and apparatus for controlling opening of an auto-darkening filter in an eye protection device |
| CN114305861B (en) * | 2022-03-14 | 2022-08-12 | 常州迅安科技股份有限公司 | Light valve color number control method of automatic light-changing filter |
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