CN109862288A - Video automatic switch-over circuit and working method with dual camera electric welder's helmet - Google Patents
Video automatic switch-over circuit and working method with dual camera electric welder's helmet Download PDFInfo
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- CN109862288A CN109862288A CN201910233024.4A CN201910233024A CN109862288A CN 109862288 A CN109862288 A CN 109862288A CN 201910233024 A CN201910233024 A CN 201910233024A CN 109862288 A CN109862288 A CN 109862288A
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses the video automatic switch-over circuits and working method that have dual camera electric welder's helmet, video automatic switch-over circuit includes signal acquisition module, signal amplification module, time delay module, switching module, the time delay module includes timer capacitor module, comparison circuit, switch energizing circuit, discharge circuit, signal acquisition module input terminal is connect with photosensitive sensor E1 signal, signal acquisition module output end is connected with signal amplification module input terminal, signal amplification module output end is connected with timer capacitor module input, timer capacitor module output end is connected with comparison circuit input terminal, comparison circuit output end is connected with switch energizing circuit input terminal, switch energizing circuit output end is connected with switching module, discharge circuit input terminal is connected with timer capacitor module output end.The video automatic switch-over circuit can be automatically switched according to the arc light state occurred in electrode welding process, increase the convenience that electric welder's helmet uses.
Description
Technical field
The present invention relates to the video automatic switch-over circuits and working method that have dual camera electric welder's helmet.
Background technique
When weld job, the electro-welding arc being harmful to the human body can be generated.
In order to avoid the harmful radiation of the ultraviolet and infrared ray of electric arc generation and the strong light of welding are hurt caused by eyes
Evil, various electric welding protective masks are to meet the market demand to come into being, such as one kind of Patent No. CN207871052U is hand-held
Formula electric welder's helmet, hand-held electric welding face mask be using common filter glass piece as microscope group, it is cheap, but there are series of problems.
Hand-held electric welding face mask does not have automatic beam change function, and electric welder must remove electric welder's helmet striking, but the harmful electricity of naked eye contact
Welding arc light easily causes the damage of eye, and hand shield occupies the hand of electric welder, therefore encounters and need to be fixed weldering with hand
When the case where fitting, it can bring inconvenience to operation.In addition, this electric welder's helmet only has a kind of shade number, it is difficult to adapt to different
Welding needs.Light-control welding face guard is presently the most advanced electric welding protective mask, such as Patent No. in the market
A kind of automatic light-changing electric-welding face guard of CN207627484U, but the change process of light-control welding face guard light transmittance needs the time, therefore
And the effect of the moment arc light of the starting the arc can not avoid completely, but reach maximum in starting the arc prompt radiation intensity, therefore be welded
Arc light still can damage human eye.At the same time, unstable will lead to of striking and arc light intensity size when spot weld operation
The consecutive variations of light-control welding face guard color number, thus cause welding worker can not clearly observe electric welding operating condition and eye be welded
The case where arc light injures.
In conclusion it is flat to obstruct harmful arc light, realization positioning and arc manipulation completely in the existing electric welding protective mask in market
In the case where steady transition and accurate spot welding, how inventing one kind can avoid harmful arc light to damage human eye completely, is real
The electric welder's helmet with smooth transition and the accurate spot welding of arc manipulation is now positioned, there is very great meaning.
Summary of the invention
The present invention provides have dual camera electric welder's helmet video automatic switch-over circuit and working method, which overcome
The existing deficiency of background technique.The present invention solve the used technical solution of its technical problem first is that:
Video automatic switch-over circuit with dual camera electric welder's helmet, it is characterised in that: electric welder's helmet is equipped with zero diopter
Camera, optical filtering camera, liquid crystal display, photosensitive sensor E1 and video automatic switch-over circuit, the video automatically switch
Circuit includes signal acquisition module, signal amplification module, time delay module, switching module, and the time delay module includes timing
Capacitance module, comparison circuit, switch energizing circuit, discharge circuit, signal acquisition module input terminal and photosensitive sensor E1 signal
Connection, signal acquisition module output end are connected with signal amplification module input terminal, signal amplification module output end and timing electricity
Hold module input be connected, timer capacitor module output end is connected with comparison circuit input terminal, comparison circuit output end and
Switch energizing circuit input terminal is connected, and switch energizing circuit output end is connected with switching module, discharge circuit input
End is connected with timer capacitor module output end, and discharge circuit output end is connected with comparison circuit input terminal；Switching mould
Block includes relay K1, and zero diopter camera is connected with relay K1 normally-closed contact V2, and optical filtering camera and relay normally open touch
Point V1 is connected, and liquid crystal display is connected with relay common end V3；Timer capacitor module includes timer capacitor EC1；
Photosensitive sensor E1 converts optical signal into electric signal and is transmitted to signal acquisition module, and signal acquisition module will be electric
Signal is transmitted to signal amplification module, and electric signal is amplified and by electric signal transmission to timer capacitor mould by signal amplification module
Block:
When having arc light and continuing for some time T1, signal amplification module exports high potential, the meter in timer capacitor module
When capacitor EC1 charge to being full of, comparison circuit input terminal obtains high potential so that comparison circuit output end is high potential,
And then make to switch energizing circuit output end high potential, the conducting of relay K1 coil, relay common end V3 and relay normally open
Contact V1 is in contact, and liquid crystal display is connected with optical filtering camera；
When current interruption and when continuing for some time T2, signal amplification module exports low potential, the timing electricity of timer capacitor module
Hold EC1 be discharged to discharging by discharge circuit, comparison circuit input terminal obtains low potential, so that comparison circuit output end is
Low potential, and then make to switch energizing circuit output end low potential, relay K1 coil disconnects, relay common end V3 and relay
Device normally-closed contact V2 is in contact, and liquid crystal display is connected with zero diopter camera；
When spot welding, signal amplification module exports the alternate current potential of height and the height interpotential interval time is less than T2, timing
The timer capacitor EC1 of capacitance module carries out charge and discharge by discharge circuit, and comparison circuit input terminal remains low potential, so that
Comparison circuit output end is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, relay
Device common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera.
In one preferred embodiment, the signal acquisition module includes photosensitive sensor U1, resistance R12, tie point TP1, connects
Contact TP2, triode Q2, resistance R11, tie point TP3, tie point TP10, resistance R1, resistance R2, the one end photosensitive sensor U1
It is connected with triode Q2 base stage, triode Q2 collector is connected with resistance R11, and resistance R11 is connected with tie point TP3, triode
Q2 emitter ground connection, the both ends resistance R12 are connected with triode Q2 base stage, the photosensitive sensor U1 other end respectively, photosensitive sensor
The U1 other end is connected with triode Q2 emitter, and resistance R1 and resistance R2 series connection, tie point TP1 and resistance R2 and signal amplify mould
Block is connected, and tie point TP2 is connected with resistance R1 and signal amplification module, and tie point TP3 is connected with switch energizing circuit, tie point
TP10 resets discharge circuit with triode Q2 collector, pulse and is connected.
In one preferred embodiment, the discharge circuit includes triode Q3 and resistance R10, triode Q3 collector and timing
Timer capacitor EC1 anode, the comparison circuit input terminal of capacitance module are connected, and triode Q3 base stage is connected with tie point TP10, and three
Pole pipe Q3 emitter is connected with resistance R10, and resistance R10 is connected with timer capacitor EC1 cathode, ground terminal.
In one preferred embodiment, the signal amplification module includes comparator U1A, comparator U1A electrode input end and company
Contact TP1 is connected, and comparator U1A negative input is connected with comparator U1A output end, comparator U1A output end and timing electricity
Hold module input to be connected.
In one preferred embodiment, the timer capacitor module further includes resistance R4, resistance R3, capacitor C1, the one end capacitor C1
It is connected with power end, the capacitor C1 other end is connected with the one end resistance R3, ground terminal, and the resistance R3 other end is connected with comparison circuit,
The one end resistance R4 is connected with comparator U1A output end, resistance R4 other end timer capacitor EC1 anode, comparison circuit input terminal phase
Even.
In one preferred embodiment, the comparison circuit includes comparator U1B, resistance R5 and tie point TP9, comparator U1B
Negative input is connected with the resistance R3 of timer capacitor module, resistance R5, and resistance R5 is connected with comparator U1B output end, compares
Device U1B electrode input end is connected with resistance R4, triode Q3 collector, timer capacitor EC1, and tie point TP9 is connected with ground terminal.
In one preferred embodiment, the switch energizing circuit include tie point TP4, resistance R6, resistance R7, comparator U2A,
Resistance R8, capacitor C2, tie point TP8, tie point TP4 are connected with ground terminal, the connection of the one end resistance R6 and signal acquisition module
Point TP3, tie point TP8 be connected, the resistance R6 other end is connected with comparator U2A positive input terminal, resistance R7, the resistance R7 other end and
Tie point TP4, capacitor C2 are connected, and the capacitor C2 other end is connected with power end, the one end resistance R8 and comparator U2A output end phase
Even, the resistance R8 other end is connected with switching module input.
In one preferred embodiment, the switching module further includes resistance R9, triode Q1, diode D1, tie point
TP6, tie point TP7, tie point TPS, tie point TP6 are connected with relay K1 normally opened contact V1, tie point TP7 and relay K1
Normally-closed contact V2 is connected, and tie point TPS is connected with liquid crystal display, base stage, resistance R8 phase of the one end resistance R9 with triode Q1
Even, the resistance R9 other end is connected with triode Q1 collector, triode Q1 emitter and relay K1 coil one end, diode D1
Cathode is connected, and the relay K1 coil other end is connected with diode D1 anode, capacitor C2.
The present invention solve the used technical solution of its technical problem second is that: application above-mentioned any one described in band
There is the working method of the video automatic switch-over circuit of dual camera electric welder's helmet, comprising:
When having arc light, photosensitive sensor receives arc optical signal and converts optical signals to electric signal transmission to signal acquisition
Module, signal acquisition module transmit electric signal transmission to signal amplification module, signal amplification module again after amplifying electric signal
To timer capacitor module, signal amplification module exports high potential, to charge to timer capacitor:
If the arc light duration is more than or equal to T1, discharge circuit and timer capacitor EC1 are disconnected, and timer capacitor EC1 is fully charged
Amount, comparison circuit input terminal obtain high potential, so that comparison circuit output end is high potential, and then make to switch energizing circuit output
End is high potential, and relay K1 coil is connected, and relay common end V3 is in contact with relay normally open contact V1, liquid crystal display
It is connected with optical filtering camera；
If the arc light duration is less than T1, timer capacitor EC1 underfill electricity, comparison circuit input terminal obtains low potential,
So that comparison circuit output end is low potential, and then makes to switch energizing circuit output end low potential, relay K1 coil is disconnected,
Relay common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera；
When current interruption, photosensitive sensor does not receive arc optical signal, and signal acquisition module exports low potential, signal amplification module
Low potential is exported, timer capacitor discharges:
If the current interruption duration is more than or equal to T2, signal amplification module exports low potential, and timer capacitor EC1 passes through electric discharge electricity
Road be discharged to discharging, and comparison circuit input terminal obtains low potential, so that comparison circuit output end is low potential, and then makes out
Pass energizing circuit output end is low potential, and relay K1 coil disconnects, relay common end V3 and relay normally closed contact V2 phase
Contact, liquid crystal display are connected with zero diopter camera；
If the duration is less than T1, the output of signal amplification module when the duration is less than T2, has arc light when spot welding and current interruption
Just alternate current potential, discharge circuit and timer capacitor EC1 are disconnected when having arc light, timer capacitor EC1 charges but underfill, current interruption
When timer capacitor EC1 discharged by discharge circuit, comparison circuit input terminal obtains low potential always, so that comparison circuit is defeated
Outlet is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, relay common end V3
It is in contact with relay normally closed contact V2, liquid crystal display is connected with zero diopter camera.
The technical program compared with the background art, it has the following advantages:
It, can be with by the video automatic switch-over circuit 1. since electric welder's helmet is provided with zero diopter camera and optical filtering camera
Automatically switched according to the arc light state occurred in electrode welding process, is not necessarily to manual switching, increases electric welder's helmet and use just
Benefit.
2. when there is arc light, triode Q2 conducting, tie point TP10 ground connection so that triode Q3 is disconnected, discharge circuit with
Timer capacitor EC1 is disconnected, and timer capacitor EC1 disconnection can only charge；When not having arc light, triode Q2 is disconnected, tie point
TP10 is high potential, so that triode Q3 is connected, timer capacitor EC1 is discharged by discharge circuit.When can guarantee arc light
Timer capacitor EC1 only charges, and timer capacitor EC1 only discharges when without arc light, so that continue intermittent charging and discharging in spot welding,
The anode of timer capacitor EC1 remains low potential, will not generate maloperation.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 depicts the front schematic view of electric welder's helmet.
Fig. 2 depicts the A-A schematic cross-sectional view of electric welder's helmet.
Fig. 3 depicts the longitudinal sectional view of electric welder's helmet.
Fig. 4 depicts the circuit block diagram of video automatic switch-over circuit.
Fig. 5 depicts the flow chart of video automatic switch-over circuit.
Fig. 6 depicts the partial circuit diagram of the signal acquisition module of video automatic switch-over circuit.
Fig. 7 depicts the integrated circuit figure of video automatic switch-over circuit.
Specific embodiment
Fig. 1 to Fig. 7 is please referred to, one preferred embodiment of video automatic switch-over circuit with dual camera electric welder's helmet.
Electric welder's helmet is equipped with zero diopter camera 1, optical filtering camera 2, liquid crystal display 3, photosensitive sensor E1 and video
Automatic switch-over circuit 4.
Such as Fig. 1 to Fig. 3, electric welder's helmet includes mask body 10 and mounting base 20, the position of the corresponding eye of mask body 10
Be provided with mounting hole, mounting base 20 is mounted at mounting hole, zero diopter camera 1, optical filtering camera 2 be installed in mounting base 20 and
Left and right arranged for interval, video automatic switch-over circuit 4 are mounted on mounting base 20 and are located on rear side of two cameras, liquid crystal display 3
It is mounted on mounting base 20 and is located at the rear side of video automatic switch-over circuit 4.10 top of mask body is additionally provided with accommodating cavity 11, accommodating
Supplying cell 12 is placed in chamber 11, to be powered to video automatic switch-over circuit 4.When carrying out striking, spot welding, can pass through
Zero diopter camera 1 carries out shooting and shows image by liquid crystal display 3；It can be imaged by filtering when stablizing arc manipulation
First 2 carry out shooting and image are shown that optical filtering camera 2 after filtering out partial arc by passing through by liquid crystal display 3
Liquid crystal display 3 can clearly observe the state in electric welding molten bath during arc manipulation.Switched in turn using two cameras, is not necessarily to human eye
It directly observes, to avoid human eye direct-view electric arc and the injury by harmful arc light.
The video automatic switch-over circuit includes signal acquisition module, signal amplification module, time delay module, switching mould
Block, the time delay module include timer capacitor module, comparison circuit, switch energizing circuit, discharge circuit.
Signal acquisition module input terminal is connect with photosensitive sensor E1 signal, and signal acquisition module output end and signal amplify
Module input is connected, and signal amplification module output end is connected with timer capacitor module input, and timer capacitor module is defeated
Outlet is connected with comparison circuit input terminal, and comparison circuit output end is connected with switch energizing circuit input terminal, switch excitation
Circuit output end is connected with switching module, and discharge circuit input terminal is connected with timer capacitor module output end, electric discharge
Circuit output end is connected with comparison circuit input terminal；Switching module includes relay K1, zero diopter camera and relay
K1 normally-closed contact V2 is connected, and optical filtering camera is connected with relay normally open contact V1, and liquid crystal display is public with relay
End V3 is connected；Timer capacitor module includes timer capacitor EC1；
Photosensitive sensor E1 converts optical signal into electric signal and is transmitted to signal acquisition module, and signal acquisition module will be electric
Signal is transmitted to signal amplification module, and electric signal is amplified and by electric signal transmission to timer capacitor mould by signal amplification module
Block:
When having arc light and continuing for some time T1, signal amplification module exports high potential, the meter in timer capacitor module
When capacitor EC1 charge to being full of, comparison circuit input terminal obtains high potential so that comparison circuit output end is high potential,
And then make to switch energizing circuit output end high potential, the conducting of relay K1 coil, relay common end V3 and relay normally open
Contact V1 is in contact, and liquid crystal display is connected with optical filtering camera；
When current interruption and when continuing for some time T2, signal amplification module exports low potential, the timing electricity of timer capacitor module
Hold EC1 be discharged to discharging by discharge circuit, comparison circuit input terminal obtains low potential, so that comparison circuit output end is
Low potential, and then make to switch energizing circuit output end low potential, relay K1 coil disconnects, relay common end V3 and relay
Device normally-closed contact V2 is in contact, and liquid crystal display is connected with zero diopter camera；
When spot welding, signal amplification module exports the alternate current potential of height and the height interpotential interval time is less than T2, timing
The timer capacitor EC1 of capacitance module carries out charge and discharge by discharge circuit, and comparison circuit input terminal remains low potential, so that
Comparison circuit output end is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, relay
Device common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera.
In the present embodiment, the signal acquisition module includes photosensitive sensor U1, resistance R12, tie point TP1, tie point
TP2, triode Q2, resistance R11, tie point TP3, tie point TP10, resistance R1, resistance R2, one end photosensitive sensor U1 and three
Pole pipe Q2 base stage is connected, and triode Q2 collector is connected with resistance R11, and resistance R11 is connected with tie point TP3, triode Q2 hair
Emitter grounding, the both ends resistance R12 are connected with triode Q2 base stage, the photosensitive sensor U1 other end respectively, and photosensitive sensor U1 is another
One end is connected with triode Q2 emitter, resistance R1 and resistance R2 series connection, tie point TP1 and resistance R2 and signal amplification module phase
Even, tie point TP2 is connected with resistance R1 and signal amplification module, and tie point TP3 is connected with switch energizing circuit, tie point TP10
Discharge circuit is reset with triode Q2 collector, pulse to be connected.
In the present embodiment, the discharge circuit includes triode Q3 and resistance R10, triode Q3 collector and timer capacitor
Timer capacitor EC1 anode, the comparison circuit input terminal of module are connected, and triode Q3 base stage is connected with tie point TP10, triode
Q3 emitter is connected with resistance R10, and resistance R10 is connected with timer capacitor EC1 cathode, ground terminal.
In the present embodiment, the signal amplification module includes comparator U1A, comparator U1A electrode input end and tie point
TP1 is connected, and comparator U1A negative input is connected with comparator U1A output end, comparator U1A output end and timer capacitor mould
Block input terminal is connected.
In the present embodiment, the timer capacitor module further includes resistance R4, resistance R3, capacitor C1, the one end capacitor C1 and electricity
Source is connected, and the capacitor C1 other end is connected with the one end resistance R3, ground terminal, and the resistance R3 other end is connected with comparison circuit, resistance
The one end R4 is connected with comparator U1A output end, and resistance R4 other end timer capacitor EC1 anode, comparison circuit input terminal are connected.
In the present embodiment, the comparison circuit includes comparator U1B, resistance R5 and tie point TP9, comparator U1B cathode
Input terminal is connected with the resistance R3 of timer capacitor module, resistance R5, and resistance R5 is connected with comparator U1B output end, comparator U1B
Electrode input end is connected with resistance R4, triode Q3 collector, timer capacitor EC1, and tie point TP9 is connected with ground terminal.
In the present embodiment, the switch energizing circuit includes tie point TP4, resistance R6, resistance R7, comparator U2A, resistance
R8, capacitor C2, tie point TP8, tie point TP4 are connected with ground terminal, the tie point of the one end resistance R6 and signal acquisition module
TP3, tie point TP8 are connected, and the resistance R6 other end is connected with comparator U2A positive input terminal, resistance R7, the resistance R7 other end and company
Contact TP4, capacitor C2 are connected, and the capacitor C2 other end is connected with power end, and the one end resistance R8 is connected with comparator U2A output end,
The resistance R8 other end is connected with switching module input.
In the present embodiment, the switching module further include resistance R9, triode Q1, diode D1, tie point TP6,
Tie point TP7, tie point TPS, tie point TP6 are connected with relay K1 normally opened contact V1, and tie point TP7 and relay K1 are normally closed
Contact V2 is connected, and tie point TPS is connected with liquid crystal display, and the one end resistance R9 is connected with the base stage of triode Q1, resistance R8, electricity
The resistance R9 other end is connected with triode Q1 collector, triode Q1 emitter and relay K1 coil one end, diode D1 cathode
It is connected, the relay K1 coil other end is connected with diode D1 anode, capacitor C2.
Using the working method of the video automatic switch-over circuit with dual camera electric welder's helmet, comprising:
When having arc light, photosensitive sensor receives arc optical signal and converts optical signals to electric signal transmission to signal acquisition
Module, signal acquisition module transmit electric signal transmission to signal amplification module, signal amplification module again after amplifying electric signal
To timer capacitor module, signal amplification module exports high potential, to charge to timer capacitor:
If the arc light duration is more than or equal to T1, discharge circuit and timer capacitor EC1 are disconnected, and timer capacitor EC1 is fully charged
Amount, comparison circuit input terminal obtain high potential, so that comparison circuit output end is high potential, and then make to switch energizing circuit output
End is high potential, and relay K1 coil is connected, and relay common end V3 is in contact with relay normally open contact V1, liquid crystal display
It is connected with optical filtering camera；In the present embodiment, T1 value is 1.5 seconds；
If the arc light duration is less than T1, timer capacitor EC1 underfill electricity, comparison circuit input terminal obtains low potential,
So that comparison circuit output end is low potential, and then makes to switch energizing circuit output end low potential, relay K1 coil is disconnected,
Relay common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera；
When current interruption, photosensitive sensor does not receive arc optical signal, and signal acquisition module exports low potential, signal amplification module
Low potential is exported, timer capacitor discharges:
If the current interruption duration is more than or equal to T2, signal amplification module exports low potential, and timer capacitor EC1 passes through electric discharge electricity
Road be discharged to discharging, and comparison circuit input terminal obtains low potential, so that comparison circuit output end is low potential, and then makes out
Pass energizing circuit output end is low potential, and relay K1 coil disconnects, relay common end V3 and relay normally closed contact V2 phase
Contact, liquid crystal display are connected with zero diopter camera；In the present embodiment, T2 value is 1 second；
If the duration is less than T1, the output of signal amplification module when the duration is less than T2, has arc light when spot welding and current interruption
Just alternate current potential, discharge circuit and timer capacitor EC1 are disconnected when having arc light, timer capacitor EC1 charges but underfill, current interruption
When timer capacitor EC1 discharged by discharge circuit, comparison circuit input terminal obtains low potential always, so that comparison circuit is defeated
Outlet is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, relay common end V3
It is in contact with relay normally closed contact V2, liquid crystal display is connected with zero diopter camera.
Specifically:
When having arc light, photosensitive sensor E1 generates electric signal, which be connected triode Q2, and tie point TP10 is
Low potential, so that triode Q3 is disconnected, discharge circuit and timer capacitor EC1 are disconnected；And the electric signal by tie point TP1 into
Enter the input terminal of comparator U1A, the output end of comparator U1A exports high potential, which, which flows through to enter after resistance R4, compares
The input terminal of device U1B at the same time charges to timer capacitor EC1:
If the arc light duration is more than or equal to T1, timer capacitor EC1 is fully charged, the high electricity of output end output of comparator U1B
Position is simultaneously delivered to comparator U2A, and comparator U2A output end exports high potential, so that relay K1 coil is connected, relay is public
End V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera；
If the arc light duration is less than T1, timer capacitor EC1 underfill electricity, comparator U1B input terminal obtains low potential,
So that comparator U1B output end is low potential, and then making comparator U2A output end low potential, relay K1 coil disconnects, after
Electric appliance common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera；
When current interruption, photosensitive sensor does not receive arc optical signal, and triode Q2 is disconnected, and tie point TP10 is high potential, and three
Pole pipe Q3 conducting, TP1 low potentials, comparator U1A input terminal are low potential, so that comparator U1A output end is low potential, meter
When capacitor EC1 discharged by triode Q3:
If the current interruption duration is more than or equal to T2, for timer capacitor EC1 by triode Q3 discharge off, comparator U1B is defeated
Enter end and obtain low potential, so that comparator U1B output end is low potential, and then makes comparator U2A output end low potential, relay
Device K1 coil disconnects, and relay common end V3 is in contact with relay normally closed contact V2, liquid crystal display and zero diopter camera phase
It connects；
If the duration is less than T1, the output of signal amplification module when the duration is less than T2, has arc light when spot welding and current interruption
Just alternate current potential, comparator U1A exports high potential, discharge circuit and timer capacitor EC1 disconnection, timer capacitor when having arc light
EC1 charging but underfill, comparator U1A output low potential, timer capacitor EC1 are discharged by triode Q3 when current interruption, than
Low potential is obtained always compared with device U1B input terminal, so that comparator U1B output end is low potential, and then makes comparator U2A output end
For low potential, relay K1 coil is disconnected, and relay common end V3 is in contact with relay normally closed contact V2, liquid crystal display and
Zero diopter camera is connected.
The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to
Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.
Claims (9)
1. having the video automatic switch-over circuit of dual camera electric welder's helmet, it is characterised in that: electric welder's helmet is equipped with zero diopter and takes the photograph
As head, optical filtering camera, liquid crystal display, photosensitive sensor E1 and video automatic switch-over circuit, the video automatically switches electricity
Road includes signal acquisition module, signal amplification module, time delay module, switching module, and the time delay module includes timing electricity
Molar block, comparison circuit, switch energizing circuit, discharge circuit, signal acquisition module input terminal and photosensitive sensor E1 signal connect
It connects, signal acquisition module output end is connected with signal amplification module input terminal, signal amplification module output end and timer capacitor
Module input is connected, and timer capacitor module output end is connected with comparison circuit input terminal, comparison circuit output end with open
It closes energizing circuit input terminal to be connected, switch energizing circuit output end is connected with switching module, discharge circuit input terminal
It is connected with timer capacitor module output end, discharge circuit output end is connected with comparison circuit input terminal；Switching module
Including relay K1, zero diopter camera is connected with relay K1 normally-closed contact V2, optical filtering camera and relay normally open contact
V1 is connected, and liquid crystal display is connected with relay common end V3；Timer capacitor module includes timer capacitor EC1；
Photosensitive sensor E1 converts optical signal into electric signal and is transmitted to signal acquisition module, and signal acquisition module is by electric signal
It is transmitted to signal amplification module, electric signal is amplified and by electric signal transmission to timer capacitor module by signal amplification module:
When having arc light and continuing for some time T1, signal amplification module exports high potential, the timing electricity in timer capacitor module
Hold EC1 charge to being full of, comparison circuit input terminal obtains high potential, so that comparison circuit output end is high potential, in turn
Make to switch energizing circuit output end high potential, the conducting of relay K1 coil, relay common end V3 and relay normally open contact
V1 is in contact, and liquid crystal display is connected with optical filtering camera；
When current interruption and when continuing for some time T2, signal amplification module exports low potential, the timer capacitor EC1 of timer capacitor module
Be discharged to discharging by discharge circuit, comparison circuit input terminal obtains low potential, so that comparison circuit output end is low electricity
Position, and then make to switch energizing circuit output end low potential, relay K1 coil disconnects, and relay common end V3 and relay are normal
Closed contact V2 is in contact, and liquid crystal display is connected with zero diopter camera；
When spot welding, signal amplification module exports the alternate current potential of height and the height interpotential interval time is less than T2, timer capacitor
The timer capacitor EC1 of module carries out charge and discharge by discharge circuit, and comparison circuit input terminal remains low potential, so that comparing
Circuit output end is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, and relay is public
End V3 is in contact with relay normally closed contact V2 altogether, and liquid crystal display is connected with zero diopter camera.
2. the video automatic switch-over circuit according to claim 1 with dual camera electric welder's helmet, it is characterised in that: institute
State signal acquisition module include photosensitive sensor U1, resistance R12, tie point TP1, tie point TP2, triode Q2, resistance R11,
Tie point TP3, tie point TP10, resistance R1, resistance R2, the one end photosensitive sensor U1 are connected with triode Q2 base stage, triode
Q2 collector is connected with resistance R11, and resistance R11 is connected with tie point TP3, triode Q2 emitter ground connection, the both ends resistance R12 point
It is not connected with triode Q2 base stage, the photosensitive sensor U1 other end, the photosensitive sensor U1 other end and triode Q2 emitter phase
Even, resistance R1 and resistance R2 series connection, tie point TP1 is connected with resistance R2 and signal amplification module, tie point TP2 and resistance R1 and
Signal amplification module is connected, and tie point TP3 is connected with switch energizing circuit, tie point TP10 and triode Q2 collector, pulse
Discharge circuit is reset to be connected.
3. the video automatic switch-over circuit according to claim 2 with dual camera electric welder's helmet, it is characterised in that: institute
Stating discharge circuit includes triode Q3 and resistance R10, and the timer capacitor EC1 of triode Q3 collector and timer capacitor module is just
Pole, comparison circuit input terminal are connected, and triode Q3 base stage is connected with tie point TP10, triode Q3 emitter and resistance R10 phase
Even, resistance R10 is connected with timer capacitor EC1 cathode, ground terminal.
4. the video automatic switch-over circuit according to claim 3 with dual camera electric welder's helmet, it is characterised in that: institute
Stating signal amplification module includes comparator U1A, and comparator U1A electrode input end is connected with tie point TP1, comparator U1A cathode
Input terminal is connected with comparator U1A output end, and comparator U1A output end is connected with timer capacitor module input.
5. the video automatic switch-over circuit according to claim 4 with dual camera electric welder's helmet, it is characterised in that: institute
Stating timer capacitor module further includes resistance R4, resistance R3, capacitor C1, and the one end capacitor C1 is connected with power end, the capacitor C1 other end
It is connected with the one end resistance R3, ground terminal, the resistance R3 other end is connected with comparison circuit, and the one end resistance R4 and comparator U1A are exported
End is connected, and resistance R4 other end timer capacitor EC1 anode, comparison circuit input terminal are connected.
6. the video automatic switch-over circuit according to claim 5 with dual camera electric welder's helmet, it is characterised in that: institute
Stating comparison circuit includes comparator U1B, resistance R5 and tie point TP9, comparator U1B negative input and timer capacitor module
Resistance R3, resistance R5 are connected, and resistance R5 is connected with comparator U1B output end, comparator U1B electrode input end and resistance R4, three
Pole pipe Q3 collector, timer capacitor EC1 are connected, and tie point TP9 is connected with ground terminal.
7. the video automatic switch-over circuit according to claim 6 with dual camera electric welder's helmet, it is characterised in that: institute
Stating switch energizing circuit includes tie point TP4, resistance R6, resistance R7, comparator U2A, resistance R8, capacitor C2, tie point TP8,
Tie point TP4 is connected with ground terminal, and the one end resistance R6 is connected with the tie point TP3 of signal acquisition module, tie point TP8, resistance
The R6 other end is connected with comparator U2A positive input terminal, resistance R7, and the resistance R7 other end is connected with tie point TP4, capacitor C2, electricity
Hold the C2 other end to be connected with power end, the one end resistance R8 is connected with comparator U2A output end, the resistance R8 other end and switching
Module input is connected.
8. the video automatic switch-over circuit according to claim 7 with dual camera electric welder's helmet, it is characterised in that: institute
Stating switching module further includes resistance R9, triode Q1, diode D1, tie point TP6, tie point TP7, tie point TPS, is connected
Contact TP6 is connected with relay K1 normally opened contact V1, and tie point TP7 is connected with relay K1 normally-closed contact V2, tie point TPS with
Liquid crystal display is connected, and the one end resistance R9 is connected with the base stage of triode Q1, resistance R8, the resistance R9 other end and triode Q1 collection
Electrode is connected, and triode Q1 emitter is connected with relay K1 coil one end, diode D1 cathode, the relay K1 coil other end
It is connected with diode D1 anode, capacitor C2.
9. the video automatic switch-over circuit with dual camera electric welder's helmet described in any one of application claim 1 to 8
Working method, it is characterised in that: include:
When having arc light, photosensitive sensor receives arc optical signal and converts optical signals to electric signal transmission to signal acquisition mould
Electric signal transmission to signal amplification module, signal amplification module are transmitted to by block, signal acquisition module again after amplifying electric signal
Timer capacitor module, signal amplification module exports high potential, to charge to timer capacitor:
If the arc light duration is more than or equal to T1, discharge circuit and timer capacitor EC1 are disconnected, and timer capacitor EC1 is at full charge, than
High potential is obtained compared with circuit input end, so that comparison circuit output end is high potential, and then makes to switch energizing circuit output end
High potential, the conducting of relay K1 coil, relay common end V3 are in contact with relay normally open contact V1, liquid crystal display and filter
Light video camera head is connected；
If the arc light duration is less than T1, timer capacitor EC1 underfill electricity, comparison circuit input terminal obtains low potential, so that
Comparison circuit output end is low potential, and then makes to switch energizing circuit output end low potential, and relay K1 coil disconnects, relay
Device common end V3 is in contact with relay normally closed contact V2, and liquid crystal display is connected with zero diopter camera；
When current interruption, photosensitive sensor does not receive arc optical signal, and signal acquisition module exports low potential, the output of signal amplification module
Low potential, timer capacitor discharge:
If the current interruption duration be more than or equal to T2, signal amplification module export low potential, timer capacitor EC1 by discharge circuit into
Row, which is discharged to, to be discharged, and comparison circuit input terminal obtains low potential, so that comparison circuit output end is low potential, and then swashs switch
Power Generation Road output end is low potential, and relay K1 coil disconnects, and relay common end V3 is in contact with relay normally closed contact V2,
Liquid crystal display is connected with zero diopter camera；
If the duration is less than T1, signal amplification module output height when the duration is less than T2, has arc light when spot welding and current interruption
Alternate current potential, when having arc light discharge circuit and timer capacitor EC1 disconnect, timer capacitor EC1 charging but underfill, when current interruption counts
When capacitor EC1 discharged by discharge circuit, comparison circuit input terminal obtains low potential always, so that comparison circuit output end
For low potential, and then make to switch energizing circuit output end low potential, relay K1 coil disconnects, relay common end V3 and after
Electric appliance normally-closed contact V2 is in contact, and liquid crystal display is connected with zero diopter camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233024.4A CN109862288B (en) | 2019-03-26 | 2019-03-26 | Video automatic switching circuit with double-camera welding mask and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910233024.4A CN109862288B (en) | 2019-03-26 | 2019-03-26 | Video automatic switching circuit with double-camera welding mask and working method |
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| CN109862288A true CN109862288A (en) | 2019-06-07 |
| CN109862288B CN109862288B (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910233024.4A Active CN109862288B (en) | 2019-03-26 | 2019-03-26 | Video automatic switching circuit with double-camera welding mask and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227734A1 (en) * | 2020-05-09 | 2021-11-18 | 凌昆 | Multi image sensor ar acquisition and display apparatus |
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| CN109276368A (en) * | 2018-10-24 | 2019-01-29 | 华侨大学 | Self-powered ventilating band dual camera electric welder's helmet |
| CN209488694U (en) * | 2019-03-26 | 2019-10-11 | 华侨大学 | A kind of video automatic switch-over circuit with dual camera electric welder's helmet |
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| US6614409B1 (en) * | 1999-11-23 | 2003-09-02 | Otos Co., Ltd. | Glare shielding device of welding helmet and method of controlling the same |
| US20040124227A1 (en) * | 2001-02-14 | 2004-07-01 | Honda Giken Kogyo Kabushiki Kaisha | Welding condition monitoring device |
| CN102793604A (en) * | 2011-05-27 | 2012-11-28 | 王鹏 | Automatic arc light goggles for welder |
| CN109276368A (en) * | 2018-10-24 | 2019-01-29 | 华侨大学 | Self-powered ventilating band dual camera electric welder's helmet |
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| WO2021227734A1 (en) * | 2020-05-09 | 2021-11-18 | 凌昆 | Multi image sensor ar acquisition and display apparatus |
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| CN109862288B (en) | 2023-05-05 |
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