CN107242935B - A kind of automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made - Google Patents
A kind of automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made Download PDFInfo
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- CN107242935B CN107242935B CN201710409326.3A CN201710409326A CN107242935B CN 107242935 B CN107242935 B CN 107242935B CN 201710409326 A CN201710409326 A CN 201710409326A CN 107242935 B CN107242935 B CN 107242935B
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- liquid crystal
- photoelectric sensor
- filter lens
- crystal film
- automatic darkening
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Classifications
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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
- A61F9/02—Goggles
- A61F9/022—Use of special optical filters, e.g. multiple layers, filters for protection against laser light or light from nuclear explosions, screens with different filter properties on different parts of the screen; Rotating slit-discs
-
- 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
-
- 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
Abstract
The invention discloses a kind of automatic darkening welding filter lens (1), including frame (11), liquid crystal film (13), photoelectric sensor (15), and the driving circuit (17) of the driving liquid crystal film (13), the liquid crystal film (13) and the photoelectric sensor (15) are set on the frame (11), and the photoelectric sensor (15) is set to the liquid crystal film (13) close to human eye side, optical signal of photoelectric sensor (15) acquisition through the liquid crystal film (13), and feed back to the driving circuit (17), the driving circuit (17) controls the light transmittance of the liquid crystal film (13) according to the signal that the photoelectric sensor (15) is fed back, form a closed-loop control system, so that the light illumination through the automatic darkening welding filter lens is permanent It is fixed.Automatic darkening welding filter lens provided by the invention constantly carry out feedback regulation by closed-loop control system, the situation for effectivelying prevent automatic darkening welding filter lens excessively dark or excessively bright.
Description
Technical field
The present invention relates to electric welding protection technique fields, and in particular to a kind of automatic darkening welding filter lens and automatic beam change
Welding mask.
Background technique
Welding arc is often generated in metal welding process, welding arc is a kind of gas occurred between electrode and weldment
Electric discharge phenomena, contain the rays such as visible light, infrared ray and ultraviolet lights of a large amount of high intensity, high-intensitive visible light, infrared ray and
The light radiation of ultraviolet light bring can injure the eyes of welder.
The luminosity of luminous ray in welding arc, the light luminosity that can normally bear than human eye can be 10,000 times big, strong in this way
Strong visible light can burn retina, cause the retinitis, and welder will feel ocular pain, vision film paste, have center dark at this time
Point or even Blackout, such as prolonged and repeated effect, eyesight can fade.
Infrared ray is a chronic process to the damage of eyes in welding arc, and eye lens Long-term absorption is excessive red
After outside line, elasticity is deteriorated, adjusts difficult, hypopsia, and serious person will lead to lenticular muddiness, damage eyesight.In welding arc
After ultraviolet light irradiates human eye, cornea and conjunctiva inflammation will lead to, " electric ophthalmia " of generation, being listed in is except pneumoconiosis
The second largest occupational disease, ultraviolet and infrared ray may cause possible permanent damage to the eyes of people.
Welding mask is to help it that can protect in the welding process for helping welder to protect the occupational hazards from welding
Eyeshield eyeball can be accurately positioned again, efficient welding.The welding mask of early stage be filled on Handheld protective mask one block of filter glass with
Eyes are protected, but need to cover eyes in starting the arc moment, if welder's movement is not in time, eyes of burning is easy, influences to weld
Quality.
With technological progress, Auto-changing Shade Welding Mask Made occurs therewith, and Auto-changing Shade Welding Mask Made is welded equipped with automatic beam change
Optical filtering (ADF, Auto Darkening Filter) is connect to reach automatic beam change function.ADF can be supplied to welder in a forearc
One visual field limpid in sight can be accurately positioned solder joint through ADF, after the starting the arc, cover manually without welder,
ADF can be automatically dimmed rapidly, had not only reduced the intensity of visible light, but also can effectively stop the ultraviolet and infrared ray in arc light, and had prevented
Eyes are burnt.
Existing ADF generally comprise frame, the liquid crystal film on frame, the arc photosensor on the outside of frame, with
And driving circuit, the spy that ADF mainly utilizes the arrangement mode of liquid crystal molecule to change with the application voltage swing of driving circuit
Property, realize the control to light light transmittance.Playing forearc ADF is illuminated state, and welder can carry out weld preparation work, weldering through ADF
When connecing electric arc generation, arc photosensor first senses the arc light that welding generates, and then transmits a signal to driving circuit, driving electricity
Road applies voltage to liquid crystal film, to adjust the light transmittance into the ambient light for injecting ADF, ADF switchs to dark-state by illuminated state, thus anti-
Only the eyes of welder are damaged by light radiation.
The ADF of Most current, arc photosensor are served only for judgement currently either with or without welding arc light, then according to setting
Liquid crystal film drive condition adds driving voltage appropriate at liquid crystal film both ends, to reach preset transmitance.It is least a portion of for can
The ADF of transmitance is automatically adjusted, if welding surroundings change, arc photosensor senses the welding arc of different brightness
Light, and different strong and weak signals are transferred to driving circuit, then adjusted to different light transmittances by driving circuit control liquid crystal film.
But above two ADF, the welding arc light that the light transmittance of liquid crystal film is sensed by arc photosensor determine that this control mode is
Unidirectional opened loop control can not assess the regulating effect of liquid crystal film light transmittance without feedback procedure, and result may be the light transmission of ADF
Rate is excessively high, is still high-intensitive visible light, and the light transmittance of the eyes or ADF that still may injure welder is too low, visual field mistake
Secretly, welder does not see solder joint, so that influencing the efficiency of welding.
In addition existing arc photosensor is generally all smaller because expensive, common are 1.5mm × 1.5mm or
3mm × 3mm, but in the welding process, it often generates hot particle, scorching hot liquid or melts the welding slags such as metal, these welding slags one
Denier is splashed on arc photosensor, it is possible to and it blocks and even destroys arc photosensor, so that the signal of arc photosensor is influenced,
Some ADF can also be protected arc photosensor and liquid crystal film by outer screening glass, welding arc be isolated, but due to arc light
The relative area of sensor is smaller, blocks if welding slag is splashed on outer screening glass or exists between solder joint and outer screening glass
Object is equally easy to cover arc photosensor, and arc photosensor is ineffective, to the process of arc photosensor induction welding arc light
It interferes.
Therefore it is badly in need of developing the new automatic darkening welding filter lens of one kind to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of automatic darkening welding filter lens, for solving existing automatic beam change welding
The technical issues of optical filtering can not assess the regulating effect of liquid crystal film light transmittance because of unidirectional open loop control mode.
To achieve the goals above, the invention provides the following technical scheme: a kind of automatic darkening welding filter lens include mirror
Frame, at least a piece of liquid crystal film, photoelectric sensor and the driving liquid crystal film driving circuit, the liquid crystal film and described
Photoelectric sensor is set on the frame, and the photoelectric sensor is set to the liquid crystal film close to human eye side, the light
Electric transducer acquisition penetrates the optical signal of the liquid crystal film, and is converted to electric signal and feeds back to the driving circuit, the driving
Circuit controls the light transmittance of the liquid crystal film according to the electric signal of the photo-sensor feedback, forms a closed-loop control system
System, so that the light illumination through the automatic darkening welding filter lens is constant in the range of the lux 0.05-1.0.
Preferably, the photoelectric sensor is non-crystal silicon solar cell.
Non-crystal silicon solar cell is easy to larger in area, and cost is relatively low, is suitable for compared to crystal silicon solar energy battery strong
The case where striation part or ultraviolet light, non-crystal silicon solar cell can be very good to receive low light signals, and the amorphous silicon sun
The spectral response curve of energy battery is closer to human eye vision function, closer to the feeling of human eye.
Preferably, the magnitude range of the photoelectric sensor is 5mm*50mm~25mm*120mm.
The area of photoelectric sensor is far longer than existing arc photosensor, even if having, welding slag splashes or shelter hinders
Every all will not receiving optical signal to photoelectric sensor and have a huge impact, while the area of photoelectric sensor is big, can receive
More optical signals enhance signal strength, and optical signal caused by also partial offset is because of the photoelectric sensor postposition due to weakens, processing
Difficult influence.
Preferably, the automatic darkening welding filter lens further include the first optical filter set on the frame, for decaying
The light radiation of ultraviolet and infrared ray, first optical filter are located at side of the liquid crystal film far from human eye.
First optical filter can effectively prevent ultraviolet and infrared ray from entering automatic darkening welding filter lens injury optics member
Part reinforces the protection to welder's eyes.
Preferably, the automatic darkening welding filter lens further include the astigmatism plate set on the frame, for reducing light
Influence of the incidence angles degree to optical signal, the astigmatism plate is between the liquid crystal film and the photoelectric sensor.
Astigmatism plate reduces the dependence of angle of light transmittance, so that the automatic darkening welding filter lens are in welding process
Various point, line, surface light sources that may be present can accurate automatic beam change, further protect welder's eyes.
Preferably, the automatic darkening welding filter lens further include the second optical filter set on the frame, are used for light
The spectral response curve of electric transducer is adapted to match with human eye vision function, and second optical filter is located at the astigmatism plate
Between the photoelectric sensor.
The spectral response curve of photoelectric sensor is adapted to by the second optical filter to match with human eye vision function, so that light
The brightness value that electric transducer is measured by the optical signal received is consistent with the feeling of human eye, so that photoelectric sensor can generation
The power of light is judged for the eyes of welder, can preferably protect eyes.
Preferably, second optical filter is any one in coated filter, absorption-type optical filter or coloured glass.
Preferably, the automatic darkening welding filter lens further include the auxiliary photoelectric sensor on the outside of the frame,
The auxiliary photoelectric sensor acquires the optical signal being incident on the frame, and feeds back to the driving circuit, the driving
Circuit controls the light transmittance of the liquid crystal film according to the signal of the auxiliary photo-sensor feedback, realizes the automatic beam change weldering
Optical filtering is connect by the transformation of illuminated state to dark-state.
Assist photoelectric sensor in the moment dimmed liquid crystal film in advance of the starting the arc, then photoelectric sensor is according to penetrating liquid crystal film
Optical signal continue feedback control procedure, reducing photoelectric sensor may be because the factors such as circuit linearity amplification and handles stagnant
Influence afterwards carries out auxiliary judgment and makes closed-loop control system more accurate.
Preferably, the auxiliary photoelectric sensor is photo resistance or photodiode.
The present invention also provides a kind of Auto-changing Shade Welding Mask Made, the Auto-changing Shade Welding Mask Made includes such as any of the above-described
The automatic darkening welding filter lens.
Compared with the prior art, automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made of the present invention have
Following advantage:
One, the present invention constantly carries out feedback regulation by closed-loop control system, until the automatic darkening welding filter lens
Adjust dark-state shade number with welding the illumination of light it is corresponding so that through the automatic darkening welding filter lens light illumination perseverance
It is fixed, it effectively prevent automatic darkening welding filter lens excessively dark, welder may not see welding surroundings or automatic beam change welding filters
The case where mirror is excessively bright, still may injure welder's eyes；
Two, automatic darkening welding filter lens provided by the invention use closed-loop control system, improve the automatic beam change
Weld the reliability and stability of optical filtering, it is easier to reach optimum Working.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the automatic darkening welding filter lens of the first preferred embodiment of the invention；
Fig. 2 shows the control planning figures of Fig. 1 automatic darkening welding filter lens；
Fig. 3 shows the fair curve of the second optical filter in Fig. 1；
Fig. 4 shows the structural schematic diagram of the automatic darkening welding filter lens of second of preferred embodiment of the invention.
Detailed description of the invention
11- frame, the first optical filter of 12-,
13- liquid crystal film, 14- astigmatism plate,
15- photoelectric sensor, the second optical filter of 16-,
17- driving circuit, 19- assist photoelectric sensor.
Specific embodiment
The present invention provides many applicable creative concepts, which be can be reflected in a large number of on specific
Hereinafter.The specific embodiment described in following embodiments of the present invention is only used as a specific embodiment of the invention
Exemplary illustration, and be not meant to limit the scope of the invention.
First to the present invention relates to noun explain:
380 nanometers to 780 nanometers of wavelength period is defined as visible light section in electromagnetic spectrum, i.e. human eye can detecte
Light radiation range, wavelength period of the wavelength less than 380 nanometers are defined as ultra-violet bands, and wavelength is greater than 780 nanometers of wavelength period
It is defined as infrared ray wave band.
According to national sector standard GB/T 3609.2-2009 " professional eye face protection welding protection first part: automatic
Darkening welding filter " in regulation, automatic darkening welding filter lens is defined as:, can be from when welding moment and generating electric arc
It is dynamic that shade number is converted into the protection optical filtering of high value (dark-state shade number) from lower value (bright state shade number).
Automatic darkening welding filter lens are divided into the automatic darkening welding filter lens for manually setting grade and automatic setting grade
Automatic darkening welding filter lens, wherein manually set grade automatic darkening welding filter lens refer to welding starting the arc moment,
Grade can be filtered from the protection that lower value (bright state grade) is automatically switched to a preset high value (dark-state grade)
Light microscopic；The automatic beam change optical filtering of automatic setting grade refers to auto-conversion function, can be generated according to welding starting the arc moment
Arc light irradiation level power, the automatic darkening welding filter lens of adjust automatically dark-state shade number grade.
Shade number N is that the darkness of automatic darkening welding filter lens is numbered, shade number N and visible transmission ratio τvBetween exist
Shown in relational expression such as formula (1).
Visible transmission is than for by the ratio of the exit luminous flux of optical filtering and incident flux in formula (1), by formula (1)
The corresponding visible transmission ratio (i.e. visible light transmittance rate) of different shade numbers can be extrapolated, as shown in table 1.
The corresponding visible transmission ratio of the different shade number of table 1
As it can be seen from table 1 for different shade numbers, it is seen that luminous transmittance difference is very big, and shade number is lower value ratio
As shade number be 3 when, it is seen that light transmission rate is higher, reaches 10-1, i.e., it is 1/10th by light attenuation, illustrates through optical filter
Visible light it is more, the visual field of welder is relatively bright at this time；Shade number is high value when for example shade number is 13, it is seen that light transmission rate is very
It is low, reach 10-6, i.e., it is hundred a ten thousandths by light attenuation, illustrates that the visible light for penetrating optical filter is seldom, height can be hindered at this time
Injury of the intensity visible light to welder's eyes.In welding industry, according to different welding surroundings, the shade number of optical filter after the starting the arc
It is advisable with 9~13.
According to national sector standard GB/T 3609.2-2009 " professional eye face protection welding protection first part: automatic
Darkening welding filter " in regulation, bright state shade number be welding arc generate before, automatic darkening welding filter lens luminous transmittance
The corresponding shade number of maximum value, dark-state shade number be welding arc generate after, automatic darkening welding filter lens it is achieved compared with
The corresponding shade number of low light transmission ratio.
The automatic darkening welding filter lens of automatic setting grade, will meet claimed below:
Dark-state shade number N will depend on illumination EV, illumination, that is, intensity of illumination refers to the light of received visible light on unit area
Flux is used to indicate the power of illumination and the amount of the illuminated degree of body surface area.The relational expression of dark-state shade number and illumination is such as
Shown in formula (2).
N=2.93+2.25lg (EV) formula (2)
In formula (2), illumination EvRefer to: the brightness value of automatic darkening welding filter lens plane of incidence front illuminated, unit lx
(lux).
The different corresponding brightness values of dark-state shade number can be extrapolated by formula (2), as shown in table 2.
The different corresponding brightness value of dark-state shade number of table 2
| Dark-state shade number/N | Illumination Ev/lx |
| 8 | 180 |
| 9 | 500 |
| 10 | 1400 |
| 11 | 3900 |
| 12 | 10700 |
| 13 | 30000 |
| 14 | 83000 |
From table 2 it can be seen that the automatic automatic beam change for setting grade, which welds, to filter in the welding surroundings in different illumination
Mirror, which needs to be automatically changed to different dark-state shade numbers, can be only achieved the purpose of protection eyes, and the illumination for welding light is lower value ratio
When (lux) for example 180lx, it is 8 that automatic darkening welding filter lens, which answer adjust automatically dark-state shade number, while according to the number of table 1
When according to, dark-state shade number being 8, it is seen that luminous transmittance 0.00061-0.0016, then through automatic darkening welding filter lens can
Light-exposed illumination should be within the scope of the lux 0.1098-0.288；It is such as 30000lx (Le Ke that the illumination for welding light, which is high value,
This) when, it is 13 that automatic darkening welding filter lens, which answer adjust automatically dark-state shade number, while according to the data of table 1, dark-state shade number
When being 13, it is seen that luminous transmittance 0.0000044-0.000012 then penetrates the visible light illumination of automatic darkening welding filter lens
It should be within the scope of the lux 0.132-0.360.
Obtained so being computed, when welding light illumination be within the scope of 180-83000lx, automatic darkening welding filter lens
It should be automatically adjusted to corresponding dark-state shade number, should be strangled in 0.1-0.4 through the visible light illumination of automatic darkening welding filter lens
Gram this range is kept constant.It should be noted that can permit and marking in view of the otherness of human eye and the difference of individual hobby
There is the adjusting of ± 1 color number in quasi- range, so the visible light illumination through automatic darkening welding filter lens should be 0.132/
2.68-0.360*2.68 being kept constant within the scope of i.e. 0.05~1.0 lux.
The invention will be further described with specific embodiment with reference to the accompanying drawing.
Embodiment 1
As shown in Figures 1 and 2, the present embodiment provides a kind of automatic darkening welding filter lens, the automatic beam change welding filters
Light microscopic is the automatic darkening welding filter lens of automatic setting grade.
The automatic darkening welding filter lens include frame 11, the first optical filter 12, liquid crystal film 13, astigmatism plate 14, photoelectricity
The driving circuit 17 of sensor 15, the second optical filter 16 and the driving liquid crystal film 13, along light direction of illumination, described the
One optical filter 12, liquid crystal film 13, astigmatism plate 14, the second optical filter 16, photoelectric sensor 15 are sequentially arranged in the frame 11, institute
State the side that photoelectric sensor 15 is provided close to human eye, the liquid crystal film 13 and the photoelectric sensor 15 respectively with the driving
Circuit 17 is connected.
The frame 11 is fixed its position, is convenient for the automatic darkening welding filter lens for installing each optical element
It is mounted as a whole on Auto-changing Shade Welding Mask Made.
Light radiation of first optical filter 12 for the ultraviolet and infrared ray that decays is located at automatic beam change welding filter
The outermost of light microscopic, i.e., described side of the liquid crystal film 13 far from human eye.Specifically, first optical filter 12 is UV/IR optical filtering
Piece, no matter whether welder's local environment or the driving circuit 17 work, and first optical filter 12 all has same purple
Outside line and infrared ray obstructing capacity can effectively prevent ultraviolet and infrared ray from entering automatic darkening welding filter lens injury optics
Element reinforces the protection to welder's eyes.
The liquid crystal film 13 is using liquid crystal light valve principle, and liquid crystal light valve is the refractive index that liquid crystal molecule is controlled by voltage
To realize the phase delay to light.
Specifically, liquid crystal light valve is by a liquid crystal cell with alignment film and the polarizer group set on liquid crystal cell two sides
At.When not applying voltage to liquid crystal light valve, the liquid crystal molecule in liquid crystal cell is arranged with the direction rotatory that alignment film is limited,
It is parallel with plane where polarizing film, optically-active effect is generated to the light passed through, the linear polarization incident light through polarizing film is made to pass through liquid
After brilliant box, it can be emitted from the polarizing film vertical with incident polarizer；Liquid crystal when applying voltage to liquid crystal light valve, in liquid crystal cell
Molecule generates inclination angle arrangement in raw water plane, and optical activity disappears, can not be from inclined with incidence through the polarised light of polarizing film
The vertical polarizing film outgoing of the piece that shakes, voltage is bigger, and the inclination angle of liquid crystal molecule is bigger, more perpendicular to the horizontal plane where polarizing film
Arrangement, it is lower to the transmittance of light.
The quantity of the liquid crystal film 13 be it is at least a piece of, in the present embodiment, the quantity of the liquid crystal film 13 is preferably two
Piece, certainly, in order to improve the optical characteristics of the automatic darkening welding filter lens, the liquid crystal film 13 or three pieces.
In the present embodiment, the liquid crystal film 13 is twisted nematic (Twist Nematic, TN) type liquid crystal film, certainly,
The liquid crystal film 13 can also be other kinds of liquid crystal film, such as vertically oriented (Vertical Alignment, VA) type liquid
(In-Plane Switching, IPS) type liquid crystal film is converted in chip, face, fringing field converts (Fringe Filed
Switching, FFS) type liquid crystal film etc., as long as liquid crystal molecule rotation can be controlled by electric signal.
The astigmatism plate 14, for reducing influence of the incidence angles degree to optical signal of light.If without the astigmatism plate
14, incident light is irradiated on automatic darkening welding filter lens with identical intensity of illumination, different incident angles, automatic beam change weldering
The light intensity difference that optical filtering receives is connect, light transmittance changes therewith, possible very strong intensity of illumination, but light transmittance is lower,
The eyes of injury welder are remained to, so the present invention provides the astigmatism plate 14 and is set to the liquid crystal film 13 and second optical filter
Between 16, the automatic beam change is maintained in the range of the normal of incident light and automatic darkening welding filter lens is at 15 ° of solid angles
The light transmittance of welding optical filtering does not change with the change of incident angle, that is, reduces the dependence of angle of light transmittance, so that institute
Various point, line, surface light sources that may be present in welding process can accurately be become automatically by stating automatic darkening welding filter lens
Light further protects welder's eyes.
The photoelectric sensor 15 is preferably non-crystal silicon solar cell.Non-crystal silicon solar cell generally uses high frequency brightness
Light charging method deposits silane gas decomposition.Since outer solution depositing temperature is low, can glass, stainless steel plate, ceramic wafer,
Flexiplast on piece deposits the film of about 1 μ m-thick, is easy to larger in area, cost is relatively low, mostly uses p in structure.To improve efficiency
With improvement stability, the multi-laminates layered structure such as three layers of P in, or some transition zones of insertion are also made sometimes.
The working principle of non-crystal silicon solar cell is based on photovoltaic effect, and non-crystalline silicon photocell essence is one big
The PN junction of area, it is every in the area P if photon energy is greater than the forbidden bandwidth of amorphous silicon when incident light irradiates the area P surface
Absorb a photon just generate one " electron-hole " it is right.The photon of the area P Surface absorption is more, and " electron-hole " of excitation is right
It is more, and the photon inside flowing to is fewer, this concentration difference just forms the natural tendency internally spread from surface, due to PN junction
The direction of internal electric field is to be directed toward the area P by the area N, so " electron-hole " that is diffused near PN junction to can separate, light induced electron quilt
Push the area N to, photohole is left on the area P, to make N zone negative electricity, P zone positive electricity forms photo-induced voltage.If using conducting wire
The area P and the area N are linked together, photoelectric current is just had in circuit and is passed through, electric signal is converted to by optical signal.Therefore in incident light
Under irradiation, the electric current that non-crystal silicon solar cell generates will increase with the increase of light intensity, be converted to electric signal by optical signal.
As shown in Fig. 2, the acquisition of photoelectric sensor 15 is converted to electric signal through the optical signal of the liquid crystal film 13,
By feeding back to the driving circuit 17, the telecommunications that the driving circuit 17 is fed back according to the photoelectric sensor 15 after amplification
The light transmittance of number control liquid crystal film 13, forms a closed-loop control system, filters so that welding through the automatic beam change
The light illumination of mirror is constant.The closed-loop control system is negative feed back control system.
Specifically, optical signal of the photoelectric sensor 15 acquisition through the liquid crystal film 13, if welding light be illumination compared with
High visible light, then stronger through the optical signal of the liquid crystal film 13, the photoelectric sensor 15 switchs to stronger optical signal
After stronger electric signal feeds back to the driving circuit 17, the driving circuit 17 will apply a biggish voltage to described
Liquid crystal film 13 reduces the light transmittance of the liquid crystal film 13, reduces through the light of the liquid crystal film 13；
If the light transmittance of the liquid crystal film 13 is adjusted too low, i.e. dark-state shade number is excessively high, at this time the photoelectric sensor
15 collect a very weak optical signal, are converted to electric signal and feed back to the driving circuit 17, the driving circuit 17 will
Reduce the voltage applied, improve the light transmittance of the liquid crystal film 13, reduces dark-state shade number；
If the light transmittance of the liquid crystal film 13 is adjusted excessively high, i.e. dark-state shade number is too low, at this time the photoelectric sensor
15 collect a still very strong optical signal, are converted to electric signal and feed back to the driving circuit 17, the driving circuit 17
It will continue to increase the voltage applied, reduce the light transmittance of the liquid crystal film 13, improve dark-state shade number；
By the above-mentioned closed-loop control system constantly fed back, hidden until the automatic darkening welding filter lens are adjusted to dark-state
Light number is corresponding with the welding illumination of light, so that it is constant through the light illumination of the automatic darkening welding filter lens, it effectively prevent
Automatic darkening welding filter lens are excessively dark, and welder may not see welding surroundings or automatic darkening welding filter lens are excessively bright, still
The case where welder's eyes may be injured, improves the reliability and stability of the automatic darkening welding filter lens, it is easier to reach
To optimum Working.
It should be noted that the closed-loop control system adjusts conversion of the automatic darkening welding filter lens from bright state to dark-state
Time is very of short duration, may be only in signa between a ten thousandth second or even shorter, therefore conversion time is to welder's
Influence can be ignored.
In the present embodiment, the magnitude range of the photoelectric sensor 15 is 5mm*50mm~25mm*120mm.The light
The area of electric transducer 15 is far longer than the arc photosensor that existing size is 1.5mm × 1.5mm or 3mm × 3mm, even if there is weldering
Slag splashes or shelter barrier, all will not receive optical signal to the photoelectric sensor 15 and have a huge impact, while institute
The area for stating photoelectric sensor 15 is big, can receive more optical signals, enhance signal strength, and also partial offset is because of the light
15 postposition of electric transducer and caused by optical signal weakens, processing is difficult influence.
Second optical filter 16, for the spectral response curve of the photoelectric sensor 15 to be adapted to and human eye vision
Function matches.
Human eye has different sensitivity to the light of various different wave lengths, the eyes of different people, to the light of various wavelength
Sensitivity is also often differentiated, though identical radiant power, but the brightness sensation that the different light made a block booking generate human eye
Be it is different, International Commission on Illumination (CIE) pass through many experiments and statistics, provide brightness of the human eye to the light of different wave length
The relative sensitivity of feeling, referred to as spectral luminous efficiency curve, also referred to as human eye vision function.
As shown in figure 3, the photoelectric sensor 15 is non-crystal silicon solar cell, spectral response curve is close to human eye
Visibility function, second optical filter 16 are modified the spectral response curve of the photoelectric sensor 15, and it is bent to obtain amendment
Line, fair curve match with human eye vision function, so that the photoelectric sensor 15 is measured by the optical signal received
Brightness value it is consistent with the feeling of human eye, so that the eyes that the photoelectric sensor 15 can replace welder judge the strong of light
It is weak, it can preferably protect eyes.
In addition, after second optical filter 16 is corrected, it can mask that human eye can't see but photoelectric sensor 15 is sensitive
Light, for example the photoelectric sensor 15 is to infrared ray responsive, if correcting without second optical filter 16, shines when certain
To the photoelectric sensor 15, the photoelectric sensor 15 is possible to think to have received stronger light the Infrared irradiation of degree,
The driving circuit 17 is given with regard to the electric signal of output error, the light transmittance of the liquid crystal film 13 is turned down, the automatic beam change weldering
It is dimmed to connect optical filtering, but actually human eye can't see infrared light, not will be considered that at this time there is strong light, so automatic beam change welds
The dimmed operation for being possible to influence welder of optical filtering, adversely affects.
Second optical filter 16 is any one in coated filter, absorption-type optical filter or coloured glass.
As shown in Fig. 2, the automatic beam change process of automatic darkening welding filter lens provided in this embodiment are as follows:
Forearc is played, when user is without welding operation, welding arc light, the driving is not detected in the photoelectric sensor 15
Circuit 17 does not apply voltage, and the liquid crystal film 13 is illuminated state.
After the starting the arc, welding light is detected through the liquid crystal film 13 by the photoelectric sensor 15, the photoelectric sensor
15 based on the received optical signal be converted to electric signal and feed back to the driving circuit 17, the driving circuit 17 applies certain electricity
Pressure, the light transmittance of the liquid crystal film 13 reduce and dimmed；
If the light transmittance of the liquid crystal film 13 is adjusted too low, i.e. dark-state shade number is excessively high, at this time the photoelectric sensor
15 collect a very weak optical signal, are converted to electric signal and feed back to the driving circuit 17, the driving circuit 17 will
Reduce the voltage applied, improve the light transmittance of the liquid crystal film 13, reduces dark-state shade number；
If the light transmittance of the liquid crystal film 13 is adjusted excessively high, i.e. dark-state shade number is too low, at this time the photoelectric sensor
15 collect a still very strong optical signal, are converted to electric signal and feed back to the driving circuit 17, the driving circuit 17
It will continue to increase the voltage applied, reduce the light transmittance of the liquid crystal film 13, improve dark-state shade number；
By the above-mentioned closed-loop control system constantly fed back, hidden until the automatic darkening welding filter lens are adjusted to dark-state
Light number is corresponding with the welding illumination of light, so that constant through the light illumination of the automatic darkening welding filter lens.
It should be noted that because non-crystal silicon solar cell manufacture is mature, at low cost and its spectral response curve connects
It is bordering on human eye vision function, correction effect is more preferable, therefore the photoelectric sensor 15 provided by the invention preferably amorphous silicon is too
Positive energy battery, but it is not limited to non-crystal silicon solar cell, as long as the optical signal through the liquid crystal film 13 can be acquired, conversion
For electric signal, by fed back to after amplification the photoelectric sensor of the driving circuit 17 protection scope of the present invention it
It is interior.
Embodiment 2
As shown in figure 4, the difference of the automatic darkening welding filter lens provided in this embodiment and embodiment 1 only exists
In: the automatic darkening welding filter lens further include the auxiliary photoelectric sensor 19 set on 11 outside of frame, the auxiliary
Photoelectric sensor 19 acquires the optical signal being incident on the frame 11, and feeds back to the driving circuit 17, the driving electricity
Road 17 controls the light transmittance of the liquid crystal film 13 according to the signal that the auxiliary photoelectric sensor 19 is fed back, and realizes the liquid crystal film
13 by illuminated state to dark-state transformation.
The working condition of the auxiliary photoelectric sensor 19 is welding light state from scratch, specifically, due to described
Photoelectric sensor 19 is assisted to be set to the outside of the frame 11, then when welding generation, the auxiliary photoelectric sensor 19 is first received
To welding light, and the driving circuit 17 is fed back to, controls the light transmittance of the liquid crystal film 13, the preparatory dimmed liquid crystal film
13, then the photoelectric sensor 15 continues feedback control procedure according to the optical signal through the liquid crystal film 13, reduces
The photoelectric sensor 15 handles the influence of lag due to linear amplifier circuit processing etc..
The auxiliary photoelectric sensor 19 is photo resistance or photodiode.
It should be noted that the auxiliary photoelectric sensor 19 is all working in entire welding process, it to be used for auxiliary judgment
Currently whether there is welding arc light.
The present invention also provides a kind of Auto-changing Shade Welding Mask Made, the Auto-changing Shade Welding Mask Made includes such as 1 institute of embodiment
Automatic darkening welding filter lens are stated, the automatic darkening welding filter lens are fixed on the Auto-changing Shade Welding Mask Made by frame
On, the Auto-changing Shade Welding Mask Made can be automatically adjusted using the automatic darkening welding filter lens according to the illumination of welding light
Shade number, closed-loop control system control is constant through the illumination of automatic darkening welding filter lens, to protect welder's eyes.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" is not excluded for depositing
In element or step not listed in the claims.
Claims (9)
1. a kind of automatic darkening welding filter lens, which is characterized in that it includes frame (11), at least a piece of liquid crystal film (13), light
Electric transducer (15) and the driving circuit (17) of the driving liquid crystal film (13), the liquid crystal film (13) and the photoelectricity
Sensor (15) is set on the frame (11), and the photoelectric sensor (15) is set to the liquid crystal film (13) close to human eye
Side, the automatic darkening welding filter lens further include the astigmatism plate (14) set on the frame (11), not for reducing light
Influence with incident angle to optical signal, the astigmatism plate (14) are located at the liquid crystal film (13) and the photoelectric sensor (15)
Between, through the liquid crystal film (13), the light after the astigmatism plate (14) astigmatism is believed again for photoelectric sensor (15) acquisition
Number, and be converted to electric signal and feed back to the driving circuit (17), the driving circuit (17) is according to the photoelectric sensor
(15) electric signal fed back controls the light transmittance of the liquid crystal film (13), a closed-loop control system is formed, so that through described in
The light illumination of automatic darkening welding filter lens is constant in the range of the lux 0.05-1.0.
2. automatic darkening welding filter lens according to claim 1, which is characterized in that the photoelectric sensor (15) is non-
Crystal silicon solar batteries.
3. automatic darkening welding filter lens according to claim 2, which is characterized in that the photoelectric sensor (15) it is big
Small range is 5mm*50mm~25mm*120mm.
4. automatic darkening welding filter lens according to claim 2, which is characterized in that the automatic darkening welding filter lens
It further include the first optical filter (12) set on the frame (11), for the light radiation for the ultraviolet and infrared ray that decays, described the
One optical filter (12) is located at side of the liquid crystal film (13) far from human eye.
5. automatic darkening welding filter lens according to claim 1, which is characterized in that the automatic darkening welding filter lens
Further include the second optical filter (16) set on the frame (11), is used for the spectral response curve of the photoelectric sensor (15)
It is adapted to and matches with human eye vision function, second optical filter (16) is located at the astigmatism plate (14) and the photoelectric sensing
Between device (15).
6. automatic darkening welding filter lens according to claim 5, which is characterized in that second optical filter (16) is plating
Any one in film optical filters, absorption-type optical filter or coloured glass.
7. automatic darkening welding filter lens according to claim 1, which is characterized in that the automatic darkening welding filter lens
It further include the auxiliary photoelectric sensor (19) on the outside of the frame (11), auxiliary photoelectric sensor (19) acquisition is incident
Optical signal on the frame (11), and the driving circuit (17) are fed back to, the driving circuit (17) is according to described auxiliary
The signal for helping photoelectric sensor (19) to feed back controls the light transmittance of the liquid crystal film (13), realizes that the automatic beam change welding filters
Mirror by illuminated state to dark-state transformation.
8. Auto-changing Shade Welding Mask Made according to claim 7, which is characterized in that the auxiliary photoelectric sensor (19) is
Photo resistance or photodiode.
9. a kind of Auto-changing Shade Welding Mask Made, which is characterized in that the Auto-changing Shade Welding Mask Made includes such as claim 1~8
Described in any item automatic darkening welding filter lens.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409326.3A CN107242935B (en) | 2017-06-02 | 2017-06-02 | A kind of automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made |
| PCT/CN2017/092794 WO2018218748A1 (en) | 2017-06-02 | 2017-07-13 | Auto-darkening welding filter and auto darkening welding helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409326.3A CN107242935B (en) | 2017-06-02 | 2017-06-02 | A kind of automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made |
Publications (2)
| Publication Number | Publication Date |
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| CN107242935A CN107242935A (en) | 2017-10-13 |
| CN107242935B true CN107242935B (en) | 2019-03-05 |
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| CN201710409326.3A Active CN107242935B (en) | 2017-06-02 | 2017-06-02 | A kind of automatic darkening welding filter lens and Auto-changing Shade Welding Mask Made |
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| Country | Link |
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| CN (1) | CN107242935B (en) |
| WO (1) | WO2018218748A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108309563A (en) * | 2018-01-08 | 2018-07-24 | 王钊轩 | A kind of welding mask carrying out photo-thermal recycling |
| CN108489714B (en) * | 2018-05-25 | 2024-01-12 | 武汉威和光电股份有限公司 | Automatic dimming welding filter shading number detection device and detection method |
| CN109870814A (en) * | 2019-03-28 | 2019-06-11 | 华侨大学 | Electric welder's helmet and its circuit structure and working method with electrochromism camera |
| KR102304918B1 (en) * | 2019-09-20 | 2021-09-27 | 주식회사 오토스윙 | Welding protector with photo functional layer and Pannel control technology |
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| CN102551953A (en) * | 2012-03-08 | 2012-07-11 | 厦门高科防静电装备有限公司 | Automatic light-transforming blinkers for welding operation |
| CN102579189A (en) * | 2011-01-12 | 2012-07-18 | 玛斯克光电科技股份有限公司 | Electric welding filter device and control method thereof |
| CN203736386U (en) * | 2012-12-07 | 2014-07-30 | 株式会社大亨 | Protecting mask and electrical arc welding device |
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| DE3634508C1 (en) * | 1986-10-09 | 1988-06-16 | Rupert Fuerthbauer | Optical filter with automatic control of the optical transmission |
| CN2032333U (en) * | 1988-01-26 | 1989-02-08 | 杭州龙坞福利厂 | High speed automatic light adjustable spectacles |
| US7501613B2 (en) * | 2003-07-08 | 2009-03-10 | Lightswitch Safety Systems, Inc. | Light detecting and angle of view compensation for optical devices and method |
| CA2670903C (en) * | 2008-07-08 | 2016-06-21 | Gang Chen | Battery low-voltage warning apparatus for auto-darkening filter for welding helmet |
| CN104107107A (en) * | 2013-04-19 | 2014-10-22 | 李骥超 | Goggles assembly structure in automatic variable-light welding mask |
| CN204521174U (en) * | 2015-03-12 | 2015-08-05 | 王韡 | Self-regulation optics protective eye lens |
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- 2017-07-13 WO PCT/CN2017/092794 patent/WO2018218748A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102579189A (en) * | 2011-01-12 | 2012-07-18 | 玛斯克光电科技股份有限公司 | Electric welding filter device and control method thereof |
| CN102551953A (en) * | 2012-03-08 | 2012-07-11 | 厦门高科防静电装备有限公司 | Automatic light-transforming blinkers for welding operation |
| CN203736386U (en) * | 2012-12-07 | 2014-07-30 | 株式会社大亨 | Protecting mask and electrical arc welding device |
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| CN107242935A (en) | 2017-10-13 |
| WO2018218748A1 (en) | 2018-12-06 |
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