CN108788574A - Electric welding machine automatic shutdown circuitry and automatic shutdown method - Google Patents
Electric welding machine automatic shutdown circuitry and automatic shutdown method Download PDFInfo
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- CN108788574A CN108788574A CN201811065118.7A CN201811065118A CN108788574A CN 108788574 A CN108788574 A CN 108788574A CN 201811065118 A CN201811065118 A CN 201811065118A CN 108788574 A CN108788574 A CN 108788574A
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- 238000003466 welding Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 description 9
- 230000003068 static effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention discloses a kind of electric welding machine automatic shutdown circuitry and automatic shutdown methods, circuit includes the power-off control module for connecting lithium battery and controlling lithium battery for power-off, and it is connected to the main control module and time delay module of power-off control module, time delay module is also electrically connected with the detection module for detecting electric welding machine working condition, time delay module does not receive the power-off signal that detection module is sent in setting time, and power-off control module disconnects lithium battery and powers to main control module.Whether this programme is in running order by detection module detection electric welding machine; and judge whether electric welding machine is in off working state for a long time using the clocking capability of time delay module; lithium battery is disconnected finally by the physical pressure of power-off control module to power for main control module; the off working state for realizing electric welding machine automatically powers off; the lithium battery of protection electric welding machine will not be in discharge condition for a long time; the service life of electric welding machine equipment is improved simultaneously, while the energy of lithium battery being avoided to waste.
Description
Technical field
The present invention relates to electric welding equipment field, a kind of electric welding machine automatic shutdown circuitry and automatic shutdown are especially related to
Method.
Background technology
Electric welding machine, user be switched on work after, need to be always maintained at energized state, with standby user at any time use electric welding machine into
Row welding processing.If electric welding machine does not use for a long time, or forgets to shut down, it will result in electric welding machine and be in standby shape for a long time
State, battery slow play electricity, for a long time, the electricity of lithium battery is consumed, and also results in the waste of electric energy.
Invention content
In order to solve the defect of the above-mentioned prior art, the object of the present invention is to provide a kind of electric welding machine automatic shutdown circuitry and
Automatic shutdown method.
In order to achieve the above objectives, the technical scheme is that：
A kind of electric welding machine automatic shutdown circuitry, including connect lithium battery and control lithium battery and control mould for the power-off of power-off
Block, and it is connected to the main control module and time delay module of the power-off control module, the time delay module is also electrically connected with use
In detection electric welding machine working condition detection module,
The time delay module does not receive the short-circuit signal that the detection module is sent in setting time, then exports power-off letter
Number give the power-off control module, power-off control module disconnect lithium battery power supply.
Further, the detection module includes triode Q601, resistance R1, R2 and R3, diode D1 and capacitance C1,
The first end of emitter connection+the 24V input and resistance R3 of triode Q601, the of the base stage connection resistance R3 of triode Q601
The collector of the first end at two ends and resistance R2, triode Q601 connects the time delay module, the second end connection electricity of resistance R2
Hold the anode of C1 and the first end of resistance R1, the anode of the second end connection diode D1 of resistance R1, the cathode of diode D1 connects
Connect operating circuit, the cathode ground connection of capacitance C1.
Further, the detection module includes triode Q601, resistance R1, R2 and R3, diode D1 and capacitance
The first end of emitter connection+the 24V input and resistance R3 of C402, triode Q601, the base stage of triode Q601 connect resistance
The collector of the first end of the second end and resistance R2 of R3, triode Q601 connects the time delay module, the second end of resistance R2
Connect the anode of diode D1 and the first end of resistance R1, the cathode connection+24V inputs of diode D1, the second end of resistance R1
The first end of capacitance C402 is connected, the second end of capacitance C402 connects operating circuit.
Further, the time delay module includes resistance R4, R5 and capacitance C2, and the first end of resistance R4 connects the three-level
The collector of pipe Q601, the anode of the first end and capacitance C2 of the second end connection resistance R5 of resistance R4, the second end of resistance R5
The power-off control module is connected with the cathode of capacitance C2.
Further, the power-off control module includes triode Q1, diode D2 and relay switch, triode Q1
Emitter connect the capacitance C2 cathode and resistance R5 second end, the base stage of triode Q1 connecting the capacitance C2 just
The first end of pole and resistance R5, the first end of collector connection the diode D2 and relay switch of triode Q1, diode D2
It is electrically connected with the second end of relay switch, relay switch is for controlling lithium battery for power-off.
Further, further include starting module for starting electric welding machine.
Further, the starting module includes start button X1 and resistance R6, and the relay switch includes relay
J1 and switch, the first end of the first end connecting valve of start button, the first end of the second end connection resistance R6 of start button,
The second end of resistance R6 connects the second end of the switch.
The present invention also proposes a kind of electric welding machine automatic shutdown method, which is characterized in that based on any one of them as above electricity
Welding machine automatic shutdown circuitry, includes the following steps：
Detect electric welding machine working condition；
Obtain the continuous time that electric welding machine is in off working state；
Judge that whether electric welding machine is in the continuous time of off working state more than preset time；
If more than then sending out power-off signal, disconnect lithium battery power supply.
Further, the detection electric welding machine working condition step, including,
By detecting electric welding machine circuit, whether short circuit determines electric welding machine working condition；
The output voltage state that PI by detecting electric welding machine adjusts circuit determines electric welding machine working condition.
The beneficial effects of the invention are as follows：It is whether in running order by detection module detection electric welding machine, and utilize delay
The clocking capability of module judges whether electric welding machine is in off working state for a long time, physical strong finally by power-off control module
System disconnects lithium battery and powers for main control module, and the off working state for realizing electric welding machine automatically powers off, and protects the lithium of electric welding machine
Battery will not be in discharge condition for a long time, while improve the service life of electric welding machine equipment, while avoid the energy of lithium battery
It wastes.
Description of the drawings
Fig. 1 is a kind of circuit diagram of electric welding machine automatic shutdown circuitry of the present invention；
Fig. 2 is a kind of circuit diagram of one electric welding machine automatic shutdown circuitry of the embodiment of the present invention；
Fig. 3 is a kind of circuit diagram of two electric welding machine automatic shutdown circuitry of the embodiment of the present invention；
Fig. 4 is the variation DC voltage figure of electric welding machine working condition of the present invention output；
Fig. 5 is the constant DC voltage figure of electric welding machine off working state of the present invention output；
Fig. 6 is a kind of method flow diagram of three electric welding machine automatic shutdown method of the embodiment of the present invention.
Specific implementation mode
To illustrate the thought and purpose of the present invention, the present invention is done further below in conjunction with the drawings and specific embodiments
Explanation.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (up, down, left, right, before and after etc.) of institute is only used in the embodiment of the present invention
Relative position relation, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component are explained, if the spy
When determining posture and changing, then directionality instruction also correspondingly changes correspondingly, and the connection can be directly connected to, and also may be used
To be to be indirectly connected with.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
It indicates or implies its relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not the present invention claims guarantor
Within the scope of shield.
Unless otherwise instructed, "/" herein represents meaning as "or".
Embodiment one:
Referring to Fig.1 with 2, the present invention proposes a kind of electric welding machine automatic shutdown circuitry, including connection lithium battery and controls lithium electricity
Pond and is connected to the main control module and time delay module of power-off control module, time delay module for the power-off control module of power-off
It is also electrically connected with the detection module for detecting electric welding machine short-circuit condition, time delay module does not receive detection module in setting time
The power-off signal sent, power-off control module disconnect lithium battery and power to main control module.
As shown in Fig. 2, in the present embodiment, detection module is short-circuit detecting circuit, short-circuit detecting circuit includes triode
Q601, resistance R1, R2 and R3, diode D1 and capacitance C1, the emitter connection+24V inputs of triode Q601 and resistance R3
First end, the first end of the second end and resistance R2 of the base stage connection resistance R3 of triode Q601, the current collection of triode Q601
Pole connects time delay module, the first end of the anode and resistance R1 of the second end connection capacitance C1 of resistance R2, the second end of resistance R1
The anode of diode D1 is connected, the cathode of diode D1 connects operating circuit, the cathode ground connection of capacitance C1.
Specifically, detection module is short-circuit detecting circuit, in output services, welding rod needs are constantly contacted with workpiece,
And welding machine circuit meeting short time short circuit every time, it is short-circuit every time, electricity is deposited by resistance R1, diode D1 above capacitance C1
It bleeds off ,+24V inputs collector eb, resistance R2 through triode Q601 and charges to capacitance C1 simultaneously, by power-off control module
Triode Q1 amplify to form short-circuit detecting electric current (namely time reset signal or short-circuit signal).
As shown in Fig. 2, time delay module includes resistance R4, R5 and capacitance C2, the first end connection triode Q601 of resistance R4
Collector, the anode of the first end and capacitance C2 of the second end connection resistance R5 of resistance R4, the second end and capacitance of resistance R5
The cathode of C2 connects power-off control module.
Specifically, when triode Q601 output currents are stored through capacitance C2, resistance R5 discharges to form delay circuit.User can
With according to actual needs or by using the specific delay duration of scene setting, delay duration depends on capacitance C2 and resistance R5
Time constant, the delay duration of target can be obtained by the combination of the capacitance C2 and resistance R5 of different parameters.
As shown in Fig. 2, power-off control module includes triode Q1, diode D2 and relay switch, triode Q1's
Emitter connects the second end of the cathode and resistance R5 of capacitance C2, the anode and resistance R5 of the base stage connection capacitance C2 of triode Q1
First end, triode Q1 collector connection diode D2 and relay switch first end, diode D2 and relay are opened
The second end of pass is electrically connected, and relay switch is for controlling lithium battery for power-off.
Power-off control module is the controller that lithium battery is powered to main control module, is controlled by triode Q1, and by after
Electric appliance J1 carries out main control module physical power-off, by checking the mutual of module, time delay module and power-off control module
Cooperation, you can realize after electric welding machine specified time does not use, the function of being automatically powered off avoids electric welding machine when not working
It discharges for a long time, influences the service life of electric welding machine lithium battery, while avoiding the unnecessary waste of the energy.
Specifically, as depicted in figs. 1 and 2, a kind of electric welding machine automatic shutdown circuitry of the present embodiment further includes for starting electricity
The starting module of welding machine.Starting module includes start button X1 and resistance R6, and relay switch includes relay J1 and switch, is opened
The first end of the first end connecting valve of dynamic button, the first end of the second end connection resistance R6 of start button, the of resistance R6
The second end of two end connecting valves.
By starting module, electric welding machine can be restarted in the case where electric welding machine is shut down and worked, start mould
Block is compatible with power-off control module so that the function of entire circuit is more complete.
When specific works, electric welding machine output services state is detected by detection module, mainly electric welding machine state into
Row short-circuit detecting often detects that short circuit then represents electric welding machine and working normally, this time reset signal (short-circuit signal)
It is sent to time delay module, time delay module often receives a time reset signal, delay time is reset, timing is restarted.?
In the delay time of setting, time delay module is not received by time reset signal, then power-off control module passes through relay J1 objects
Rationality disconnects power supply of the lithium battery to main control module so that even if electric welding machine does not have to for a long time, lithium battery does not have for a long time
The state of electric discharge.When user need to reuse, only starting module need to be executed, you can start electric welding machine and work.
It is whether short-circuit by detection module detection electric welding machine, and coordinate time delay module, and utilize the timing work(of time delay module
It can judge whether electric welding machine is in off working state for a long time, lithium battery is disconnected finally by the physical pressure of power-off control module
Power for main control module, the off working state for realizing electric welding machine automatically powers off, protect the lithium battery of electric welding machine not president when
Between be in discharge condition, while improving the service life of electric welding machine equipment, while the energy of lithium battery being avoided to waste.
Embodiment two：
Referring to Fig.1 and 3-5, the present invention propose a kind of electric welding machine automatic shutdown circuitry, including connect lithium battery and control lithium
Battery and is connected to the main control module and time delay module of power-off control module for the power-off control module of power-off, and be delayed mould
Block is also electrically connected with the detection module for detecting electric welding machine working condition, and time delay module does not receive detection mould in setting time
The power-off signal that block is sent, power-off control module disconnect lithium battery and power to main control module.
For embodiment two compared with embodiment one, time delay module, the circuit of power-off control module and starting module and work are former
Reason is consistent, then this does not do repetition statement, but the physical circuit of detection module has differences.With reference to figure 3, in the present embodiment,
Detection module be PI adjust static detection circuit, PI adjust static detection circuit include triode Q601, resistance R1, R2 and R3,
The first end of emitter connection+the 24V input and resistance R3 of diode D1 and capacitance C402, triode Q601, triode
The first end of the second end and resistance R2 of the base stage connection resistance R3 of Q601, the collector of triode Q601 connect time delay module,
The first end of the anode and resistance R1 of the second end connection diode D1 of resistance R2, the cathode connection+24V inputs of diode D1,
The first end of the second end connection capacitance C402 of resistance R1, the second end of capacitance C402 connect operating circuit.
Detection module is that PI adjusts static detection circuit, and when mash welder welds, output voltage is to change direct current at the ends PI
Voltage such as Fig. 4, and electric welding machine is when working, output voltage is constant DC voltage, as shown in Figure 5.
PI adjust static detection circuit when electric welding machine welds, change d. c. voltage signal through capacitance C402, resistance R1,
Diode D1, resistance R2, triode Q601, resistance R3 form charge and discharge circuit, and charging current flows through triode Q601 and formed
Detection electric current forms working condition detection electric current (that is to say time reset signal) through amplification, and time delay module is receiving the time
After reset signal, timing time is reset, if more than the timing time set, big time reset signal is not received also, then sends out
Power-off signal is completed to power-off control module by the physical power supply for disconnecting lithium battery to main control module of power-off control module
The automatic shut-off function that electric welding machine does not use for a long time.
A kind of course of work of electric welding machine automatic shutdown circuitry of the present embodiment is：Static detection circuit butt welding machine is adjusted by PI
Output voltage state is detected, and the preset PI of electric welding machine adjusts circuit and exports fixed constant DC voltage when not welding,
And output changes DC voltage when electric welding machine welds, PI adjusts static detection circuit and judges to weld according to the state of this voltage
The working machine state of machine.
After PI adjusting static detection circuits detect variation d. c. voltage signal, time reset signal is sent to delay electricity
Road, delay circuit often receive a time reset signal, delay time are reset, in the delay time of setting, do not connect
Time of receipt (T of R) reset signal, the physical power supply for disconnecting lithium battery to main control module of power-off control module so that electric welding machine
Even if not having to for a long time, lithium battery does not have the state of electric discharge for a long time.When user need to reuse, startup mould only need to be executed
Block, you can start electric welding machine and work.
The output voltage state of electric welding machine is detected by detection module, and coordinates time delay module, and utilizes time delay module
Clocking capability judges whether electric welding machine is in off working state for a long time, is disconnected finally by the physical pressure of power-off control module
Lithium battery is powered for main control module, and the off working state for realizing electric welding machine automatically powers off, and protects the lithium battery of electric welding machine not
It can be in discharge condition for a long time, while improving the service life of electric welding machine equipment, while avoiding the energy of lithium battery unrestrained in vain
Take.
Embodiment three：
With reference to figure 6, the present invention also proposes a kind of electric welding machine automatic shutdown method, which is characterized in that based on above-mentioned one kind
Electric welding machine automatic shutdown circuitry, specifically includes following steps：
S1, detection electric welding machine working condition.
S2, the continuous time that electric welding machine is in off working state is obtained.
S3, judge that whether electric welding machine is in the continuous time of off working state more than preset time.
S4, if more than then sending out power-off signal, disconnect lithium battery power supply.
For step S1-S4, the working condition of electric welding machine is detected by detection module, utilizes the clocking capability of time delay module
Get electric welding machine and be in the continuous time of off working state, and judge electric welding machine be in off working state duration whether
More than preset time, disconnects lithium battery finally by the physical pressure of power-off control module and power for main control module, realize
The off working state of electric welding machine automatically powers off, and protects the lithium battery of electric welding machine not to be in discharge condition for a long time, improves simultaneously
It is welded the service life of machine equipment, while the energy of lithium battery being avoided to waste.
S1 steps, include the following steps：
S11, by detecting electric welding machine circuit, whether short circuit determines electric welding machine working condition.
S12, the output voltage state that circuit is adjusted by detecting the PI of electric welding machine determine electric welding machine working condition.
The working condition of detection electric welding machine is corresponded to by the way that different circuits is arranged, it is whether short-circuit by detecting operating circuit
Or PI adjusts circuit output voltage type and is simply easy to obtain the working condition of electric welding machine, while electricity can be accurately obtained
The work state information of welding machine.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of electric welding machine automatic shutdown circuitry, which is characterized in that including connection lithium battery and control lithium battery for the disconnected of power-off
Electric control module, and it is connected to the main control module and time delay module of the power-off control module, the time delay module is also electric
It is connected with the detection module for detecting electric welding machine working condition,
The time delay module does not receive the power-off signal that the detection module is sent in setting time, and power-off control module disconnects
Lithium battery is powered to main control module.
2. electric welding machine automatic shutdown circuitry as described in claim 1, which is characterized in that the detection module includes triode
Q601, resistance R1, R2 and R3, diode D1 and capacitance C1, the emitter connection+24V inputs of triode Q601 and resistance R3
First end, the first end of the second end and resistance R2 of the base stage connection resistance R3 of triode Q601, the current collection of triode Q601
Pole connects the time delay module, the first end of the anode and resistance R1 of the second end connection capacitance C1 of resistance R2, and the of resistance R1
Two ends connect the anode of diode D1, and the cathode of diode D1 connects operating circuit, the cathode ground connection of capacitance C1.
3. electric welding machine automatic shutdown circuitry as described in claim 1, which is characterized in that the detection module includes triode
Q601, resistance R1, R2 and R3, diode D1 and capacitance C402, the emitter connection+24V inputs of triode Q601 and resistance
The first end of R3, the first end of the second end and resistance R2 of the base stage connection resistance R3 of triode Q601, the collection of triode Q601
Electrode connects the time delay module, the first end of the anode and resistance R1 of the second end connection diode D1 of resistance R2, diode
Cathode connection+24V the inputs of D1, the first end of the second end connection capacitance C402 of resistance R1, the second end connection of capacitance C402
Operating circuit.
4. electric welding machine automatic shutdown circuitry as claimed in claim 2 or claim 3, which is characterized in that the time delay module includes resistance
R4, R5 and capacitance C2, the first end of resistance R4 connect the collector of the triode Q601, and the second end of resistance R4 connects resistance
The second end of the anode of the first end and capacitance C2 of R5, resistance R5 connects the power-off control module with the cathode of capacitance C2.
5. electric welding machine automatic shutdown circuitry as claimed in claim 4, which is characterized in that the power-off control module includes three-level
Pipe Q1, diode D2 and relay switch, the emitter of triode Q1 connect the capacitance C2 cathode and resistance R5
The base stage at two ends, triode Q1 connects the anode of the capacitance C2 and the first end of resistance R5, the collector connection of triode Q1
The second end of the first end of diode D2 and relay switch, diode D2 and relay switch is electrically connected, and relay switch is used
In control lithium battery for power-off.
6. electric welding machine automatic shutdown circuitry as claimed in claim 5, which is characterized in that further include for starting opening for electric welding machine
Dynamic model block.
7. electric welding machine automatic shutdown circuitry as claimed in claim 6, which is characterized in that the starting module includes start button
X1 and resistance R6, the relay switch include relay J1 and switch, the first end of the first end connecting valve of start button,
The first end of the second end connection resistance R6 of start button, the second end of resistance R6 connect the second end of the switch.
8. a kind of electric welding machine automatic shutdown method, which is characterized in that certainly based on such as claim 1-7 any one of them electric welding machine
Dynamic shutdown circuit, includes the following steps：
Detect electric welding machine working condition；
Obtain the continuous time that electric welding machine is in off working state；
Judge that whether electric welding machine is in the continuous time of off working state more than preset time；
If more than then sending out power-off signal, disconnect lithium battery power supply.
9. electric welding machine automatic shutdown method as claimed in claim 8, which is characterized in that the detection electric welding machine working condition step
Suddenly, including,
By detecting electric welding machine circuit, whether short circuit determines electric welding machine working condition；
The output voltage state that PI by detecting electric welding machine adjusts circuit determines electric welding machine working condition.
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| CN201811065118.7A CN108788574A (en) | 2018-09-11 | 2018-09-11 | Electric welding machine automatic shutdown circuitry and automatic shutdown method |
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| CN201811065118.7A CN108788574A (en) | 2018-09-11 | 2018-09-11 | Electric welding machine automatic shutdown circuitry and automatic shutdown method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190655A (en) * | 2019-06-28 | 2019-08-30 | 斯泰宝机电科技(昆山)有限公司 | A kind of electric tool control device, electric tool and control method |
| CN110190655B (en) * | 2019-06-28 | 2024-05-10 | 斯泰宝机电科技(昆山)有限公司 | Electric tool control device, electric tool and control method |
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| CN203843347U (en) * | 2014-02-18 | 2014-09-24 | 杜育 | Portable off-grid type direct-current arc welding machine with built-in lithium battery pack |
| CN106425032A (en) * | 2016-11-21 | 2017-02-22 | 重庆优盾焊接材料有限公司 | No-load energy-saving circuit for welding machine based on full-wave rectification design |
| CN206200302U (en) * | 2016-12-05 | 2017-05-31 | 重庆优盾焊接材料有限公司 | A kind of A.C. welder based on coordinated signals design |
| CN209578525U (en) * | 2018-09-11 | 2019-11-05 | 深圳市川瑞贝科技有限公司 | Electric welding machine automatic shutdown circuitry |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190655A (en) * | 2019-06-28 | 2019-08-30 | 斯泰宝机电科技(昆山)有限公司 | A kind of electric tool control device, electric tool and control method |
| CN110190655B (en) * | 2019-06-28 | 2024-05-10 | 斯泰宝机电科技(昆山)有限公司 | Electric tool control device, electric tool and control method |
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