CN103439997B - The electric soldering iron control method of adjustable thermostatic and device - Google Patents
The electric soldering iron control method of adjustable thermostatic and device Download PDFInfo
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- CN103439997B CN103439997B CN201310286696.4A CN201310286696A CN103439997B CN 103439997 B CN103439997 B CN 103439997B CN 201310286696 A CN201310286696 A CN 201310286696A CN 103439997 B CN103439997 B CN 103439997B
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Abstract
The invention discloses a kind of electric soldering iron control method and device of adjustable thermostatic, the power supply that direct supply is electric soldering iron RL is controlled by PMOS, PMOS is controlled by triode T, adopts the indirect collecting temperature of amplifier UA and actual in set temperature value difference as comparer real time correction; Amplifier UB is adopted to control conducting and the cut-off of triode T; Set the working temperature of electric soldering iron by adjustment W1, determined the powered duration of unit of RL by the charging duration of electric capacity C2.The electric soldering iron control method of this adjustable thermostatic and device are based on time-sharing multiplex control principle, easy to implement, and wiring is simple and control response is fast.
Description
Technical field
The present invention relates to a kind of electric soldering iron control method and device of adjustable thermostatic.
Background technology
The constant temperature realizing electric soldering iron accurately controls, and just must have a set ofly detect electric soldering iron real time temperature at any time and be fed back to the controller of heating arrangement.Existing adjustable, constant temperature electric iron commercial product, all adopt thermocouple sensor as control collection head without exception, block scheme, as Fig. 1, be weak electric signal, and computer heating control is forceful electric power signal, therefore always both is set up branch circuit separately separately owing to gathering.
Its major defect is: (1) heater, collection head are two different physical bodies, and gather and judge to control action, time delay is slightly long; (2) have physical clearance between collection head and iron core, collection result and iron core actual temperature deviation are more greatly; (3), in using, if collection head breaks down, then iron core temperature can be caused uncontrollable, until burn out; (4) iron core connects to controller minimum need 4 line, and wiring is complicated, and portable limited, failure rate is high.
Therefore, the electric soldering iron control method and the device that design a kind of better adjustable thermostatic is necessary.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of better and the electric soldering iron control method of the adjustable thermostatic of uniqueness and device, the electric soldering iron control method of this adjustable thermostatic and device will be powered with signals collecting with using a pair line based on collinear time-sharing multiplex control principle, be easy to manufacture and implement, portable use, wiring is simple and control response is fast.
The technical solution of invention is as follows:
An electric iron controller for adjustable thermostatic, employing PMOS controls the power supply that direct supply is electric soldering iron RL, and the positive pole V+ of direct supply connects the S pole of PMOS, and the D pole of PMOS is through RL ground connection;
V+ sets up stabilized voltage supply by three terminal regulator TL431 at P point after pressure limiting resistance R1, and P point is connected to the D pole of PMOS by diode D1 and the adjustable resistance W2 playing calibration function; The negative pole of D1 meets W2;
Adjustable resistance W1, resistance R3 and resistance R4 for arranging constant temperature point are connected in series formation dividing potential drop branch road successively and are connected across between P point and ground;
The positive input terminal of amplifier UA connects the tie point of W2 and RL through resistance R2; The positive pole of diode D2 and negative pole connect positive input terminal and the ground of amplifier UA respectively; The negative input termination R3 of amplifier UA and the tie point of R4;
Resistance R5 through being connected in series successively of the output terminal of amplifier UA and electric capacity C2 ground connection; Diode D3 and R5 is in parallel, and the negative pole of D3 connects the output terminal of amplifier UA;
The positive pole of D3 connects the negative input end of amplifier UB, and the dividing potential drop branch road that resistance R6 and resistance R7 forms is connected across between P point and ground; The tie point of R6 and R7 connects the positive input terminal of amplifier UB, and between the positive input terminal of UB and the output terminal of UB, cross-over connection has resistance R8; The output terminal of UB connects the b pole of triode by resistance R9; Resistance R10 is connected between the b pole of triode T and ground;
The c pole of triode T meets V+ by resistance R13; The e pole of triode T is by resistance R14 ground connection; The c pole of triode T connects the G pole of PMOS; Described triode T is NPN type triode.
The electric iron controller of described adjustable thermostatic also comprises indicating circuit; Indicating circuit comprises the minus earth of luminotron D4 and resistance R15, D4, and the positive pole of D4 connects the D pole of PMOS through R15.
Mu balanced circuit is made up of three terminal regulator TL431, resistance R11 and resistance R12; Resistance R11 and resistance R12 forms dividing potential drop branch road and is connected across between P point and ground; The anode A of TL431 and negative electrode K ground connection and P point respectively; The reference pole R connecting resistance R11 of TL431 and the tie point of resistance R12.
A control method for the electric soldering iron of adjustable thermostatic, control by PMOS the power supply that direct supply V+ is electric soldering iron RL, PMOS is controlled by triode T, adopts the indirect collecting temperature of amplifier UA and actual in set temperature value difference as comparer real time correction; Amplifier UB is adopted to control conducting and the cut-off of triode T; Set the working temperature of electric soldering iron by adjustment W1, determined the powered duration of unit of iron core RL by the charging duration of electric capacity C2.
The electric iron controller of aforesaid adjustable thermostatic is adopted to realize the thermostatic control of electric soldering iron.
Core idea of the present invention is:
(1) controller is strong, weak signal is collinear time-sharing multiplex.
(2) fully application iron core powered heating temperature rise is corresponding with its internal resistance value changes.
(first welding stage flatiron handle temperature digital-display is set to certain value through detecting internal resistance avometer during friendship China 862D+ sealing-off platform handle iron core different temperatures, to be heated to constant time measure flatiron handle internal heat generation core, thermopair resistance value immediately), numerical value is as follows:
Still can find out from by upper table, with the rising of temperature, the internal resistance of heat generating core is increase in direct ratio and in regulation and control section internal linear better, about temperature often raises 100 degree of internal resistances and increases 1.5 Europe.
Beneficial effect:
The electric soldering iron control method of adjustable thermostatic of the present invention and device, itself interior resistance based on iron core is the physical characteristics increased with the rising of temperature, and the mode adopting time-sharing multiplex control and interruption (pulse) to heat realizes heating and the temperature detection of electric soldering iron; There is following outstanding advantages:
(1) between collection head and heat generating core without physical clearance, collection result and iron core actual temperature bias free.
(2) gather be integrated same with heating, there will not be uncontrollable phenomenon.
(3) flatiron handle connects and nonpolarity restriction to controller minimum need 2 line, and line is simple, highly versatile, and reliable operation, failure rate is low.
(4) circuit is simple, is convenient to portable use.
(5) decrease the thermopair in handle, manufacture more easy and save material cost.
Accompanying drawing explanation
Fig. 1 is the block scheme of existing electric soldering iron temperature controller;
Fig. 2 is the circuit theory diagrams of the electric iron controller of adjustable thermostatic of the present invention.
Embodiment
Below with reference to the drawings and specific embodiments, the present invention is described in further details:
Embodiment 1:
As shown in Figure 2, the electric iron controller principle of work of adjustable thermostatic of the present invention and the course of work are described as follows:
When just powering on, the 6th pin of UB is low level, then 7 pin export high level, make metal-oxide-semiconductor conducting, the powered intensification of iron core by T.During metal-oxide-semiconductor conducting, supply voltage is added on the 3rd pin of UA, due to the pressure limiting of D2 by R2, about about 0.6 volt, 3 pin, voltage (being set between 50 ~ 110 millivolts by R4, R3 and W1) on 2 pin, is made 1 pin export high level, charges through R5 to C2.After several seconds zero point (time is determined, within being arranged on 1 second by R5 and C2), C2 is full of, and the 6th pin level of UB, higher than the 5th pin, makes 7 pin output low levels, and metal-oxide-semiconductor turns off.UA is connected into comparer, and now the dividing potential drop of RL and W2 adds to its 3rd pin through R2, compare with the control voltage on 2 pin (temperature of corresponding 100 ~ 500 DEG C, make RL 100 DEG C time by adjustment W2 and the partial pressure value of W2 at about 50 millivolts).When 3 pin voltages are less than 2 pin, 1 pin output low level, C2 by D3, UA the 1st pin discharge rapidly (because of the existence of D3, the time is within 0.1 second), metal-oxide-semiconductor conducting, iron core continues by electrical heating; Otherwise then metal-oxide-semiconductor turns off, iron core stops heating, and so circulate said process, maintains the relative constancy of iron core temperature.Be controller be in a word that iron core is powered with pulse condition, individual pulse width is determined by the charging duration of C2, and the 6th pin level that inter-train pause is discharged to UB by C2 by D3 is just determined lower than duration during 5 pin; Real time temperature detects and has just closed the moment of having no progeny at metal-oxide-semiconductor and carry out.Just can be adjusted the temperature height of iron core by the size adjusting W1, the anglec of rotation of the swing handle of W1 is marked with corresponding temperature value, and then in use iron core be adjusted to temperature required point easily.
Major function device effect: RL-heat-emitting soldering iron core; PMOS-iron core supplies, power-off electronic switch; UA-temperature is arranged and Real-time Collection comparer; UB-controls rear class electronic switch according to prime signal; D1-insulating power supply voltage is on the impact of late-class circuit; D2-clamper UA the 3rd pin maximum potential; D3-provides rapid discharge passage for C2; TL431-provides stabilized voltage supply for gathering control module; W1-arranges constant temperature point; W2-corrects initial constant temperature point; R5 and C2-unit power-up period duration controls; D4-RL indicates by electricity condition.
R1-1.5KΩ、R4-200Ω、R5-620KΩ、R14-510Ω，R2、R3、R6～R13、R15-10KΩ*11，W1-0～10KΩ、W2-400Ω～1KΩ，C1-470PF、C2-0.33UF、C3-4.7UF。
For ensureing that the control module working stabilities such as amplifier are reliable, must be powered by stabilized voltage supply, this place TL431 is set as 5 volts.
PMOS upper end is that S meets V+, and lower end is that D meets RL.
Made experimental circuit according to front described principle to test, when iron core temperature is more lower than design temperature point, pilot lamp is Chang Liang almost; Then become blink states time close, and when temperature is more higher than design temperature point, pilot lamp does not work when only having close and becomes blink states yet.Be 100-450 DEG C by temperature control settings, by 24 volts of DC power supply, connect former friendship China 862D+ sealing-off platform flatiron handle (need not former thermopair make collection head), (detect with the thermopair resistance in core with avometer after powering on, contrast before tabular value as relevant temperature reference value), in 10 seconds solder horn be warming up to minimum start to control a little 100 DEG C constant.After raising constant temperature point, from 100 DEG C be warming up to 300 DEG C about 20 seconds; From 100 DEG C be warming up to 450 DEG C about 50 seconds.Use daily seen notebook 19 volts of power adapters instead to power, from 100 DEG C be warming up to 300 DEG C about 30 seconds; From 100 DEG C be warming up to 400 DEG C about 60 seconds.The time contrasted on former welding stage slightly extends (note: flatiron handle on former welding stage from 100 DEG C be warming up to 300 DEG C about 17 seconds, 450 DEG C are warming up to about from 100 DEG C, 45 seconds), but relative to less manufacturing cost, more succinctly small and exquisite control circuit, should be have higher cost performance, and can the welding stage control enclosure of jettisoning massiveness, more convenient use.This programme circuit, according to SMD element, double-sided PCB board assembling, can be placed in flatiron handle completely.
The present invention can make the application of constant temperature electric iron more extensively, conveniently, and manufacture production more simple, cost is lower, uses more safe and reliable.
Claims (3)
1. an electric iron controller for adjustable thermostatic, is characterized in that, employing PMOS controls the power supply that direct supply is electric soldering iron RL, and the positive pole V+ of direct supply connects the S pole of PMOS, and the D pole of PMOS is through electric soldering iron RL ground connection;
Positive pole V+ sets up stabilized voltage supply by three terminal regulator TL431 at P point after pressure limiting resistance R1, and P point is connected to the D pole of PMOS by diode D1 and the adjustable resistance W2 playing calibration function; The negative pole of diode D1 meets adjustable resistance W2;
Adjustable resistance W1, resistance R3 and resistance R4 for arranging constant temperature point are connected in series formation dividing potential drop branch road successively and are connected across between P point and ground;
The positive input terminal of amplifier UA connects the tie point of adjustable resistance W2 and electric soldering iron RL through resistance R2; The positive pole of diode D2 and negative pole connect positive input terminal and the ground of amplifier UA respectively; The negative input end connecting resistance R3 of amplifier UA and the tie point of resistance R4;
Resistance R5 through being connected in series successively of the output terminal of amplifier UA and electric capacity C2 ground connection; Diode D3 is in parallel with resistance R5, and the negative pole of diode D3 connects the output terminal of amplifier UA;
The positive pole of diode D3 connects the negative input end of amplifier UB, and the dividing potential drop branch road that resistance R6 and resistance R7 forms is connected across between P point and ground; The tie point of resistance R6 and resistance R7 connects the positive input terminal of amplifier UB, and between the positive input terminal of amplifier UB and the output terminal of amplifier UB, cross-over connection has resistance R8; The output terminal of amplifier UB connects the b pole of triode T by resistance R9; Resistance R10 is connected between the b pole of triode T and ground;
The c pole of triode T meets positive pole V+ by resistance R13; The e pole of triode T is by resistance R14 ground connection; The c pole of triode T connects the G pole of PMOS; Described triode T is NPN type triode.
2. the electric iron controller of adjustable thermostatic according to claim 1, is characterized in that, also comprises indicating circuit; Indicating circuit comprises luminotron D4 and resistance R15, the minus earth of luminotron D4, and the positive pole of luminotron D4 connects the D pole of PMOS through resistance R15.
3. the control method of the electric soldering iron of an adjustable thermostatic, it is characterized in that, control by PMOS the power supply that direct supply V+ is electric soldering iron RL, PMOS is controlled by triode T, adopts the indirect collecting temperature of amplifier UA and actual in set temperature value difference as comparer real time correction; Amplifier UB is adopted to control conducting and the cut-off of triode T; Set the working temperature of electric soldering iron by adjustment adjustable resistance W1, determined the powered duration of unit of electric soldering iron RL by the charging duration of electric capacity C2;
The electric iron controller of the adjustable thermostatic described in any one of claim 1-2 is adopted to realize the thermostatic control of electric soldering iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310286696.4A CN103439997B (en) | 2013-07-09 | 2013-07-09 | The electric soldering iron control method of adjustable thermostatic and device |
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| CN201310286696.4A CN103439997B (en) | 2013-07-09 | 2013-07-09 | The electric soldering iron control method of adjustable thermostatic and device |
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| CN103439997A CN103439997A (en) | 2013-12-11 |
| CN103439997B true CN103439997B (en) | 2015-08-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103949744B (en) * | 2014-01-15 | 2016-10-26 | 中冶宝钢技术服务有限公司 | A kind of quick-heating type temperature control electric soldering iron |
| CN104972190A (en) * | 2015-06-30 | 2015-10-14 | 傅明尧 | Constant temperature electric soldering iron heating circuit |
| CN107876927A (en) * | 2017-11-17 | 2018-04-06 | 江门市上庆自动化设备有限公司 | A kind of temperature control system of automatic tin welding machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112165A (en) * | 1979-02-20 | 1980-08-29 | Marcon Electronics Co Ltd | Soldering iron |
| JPH0377591A (en) * | 1989-08-18 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Cordless iron |
| CN201009026Y (en) * | 2006-04-29 | 2008-01-23 | 东南大学 | Energy-saving flash-heating electric soldering iron control device |
| CN101109937A (en) * | 2007-09-05 | 2008-01-23 | 南京华夏电器有限公司 | Fast heating intelligent leadless welding table controller and control method thereof |
| CN101367147A (en) * | 2008-08-20 | 2009-02-18 | 深圳速特精工科技股份有限公司 | Electric soldering iron and control method for working temperature |
| CN201960237U (en) * | 2011-01-19 | 2011-09-07 | 卫斌鹏 | Electric soldering iron with temperature control device |
| CN203471097U (en) * | 2013-07-09 | 2014-03-12 | 大唐湘潭发电有限责任公司 | Controller for adjustable homothermal electric soldering iron |
-
2013
- 2013-07-09 CN CN201310286696.4A patent/CN103439997B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112165A (en) * | 1979-02-20 | 1980-08-29 | Marcon Electronics Co Ltd | Soldering iron |
| JPH0377591A (en) * | 1989-08-18 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Cordless iron |
| CN201009026Y (en) * | 2006-04-29 | 2008-01-23 | 东南大学 | Energy-saving flash-heating electric soldering iron control device |
| CN101109937A (en) * | 2007-09-05 | 2008-01-23 | 南京华夏电器有限公司 | Fast heating intelligent leadless welding table controller and control method thereof |
| CN101367147A (en) * | 2008-08-20 | 2009-02-18 | 深圳速特精工科技股份有限公司 | Electric soldering iron and control method for working temperature |
| CN201960237U (en) * | 2011-01-19 | 2011-09-07 | 卫斌鹏 | Electric soldering iron with temperature control device |
| CN203471097U (en) * | 2013-07-09 | 2014-03-12 | 大唐湘潭发电有限责任公司 | Controller for adjustable homothermal electric soldering iron |
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