CN103837793A - Instrument and method for rapidly detecting polarity of temperature-measuring thermal coupler - Google Patents
Instrument and method for rapidly detecting polarity of temperature-measuring thermal coupler Download PDFInfo
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- CN103837793A CN103837793A CN201410031967.6A CN201410031967A CN103837793A CN 103837793 A CN103837793 A CN 103837793A CN 201410031967 A CN201410031967 A CN 201410031967A CN 103837793 A CN103837793 A CN 103837793A
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Abstract
The invention relates to an instrument and method for rapidly detecting the polarity of a temperature-measuring thermal coupler and belongs to the technical field of detecting. The instrument comprises a thermal coupler socket, an access switching relay, a heating power supply, an SOC (ADUC834), a photoelectric coupler, a relay driving audion, a polarity indicating light-emitting tube, a sound alarming device, and a working power supply. The thermal coupler is connected with the access switching relay through the thermal coupler socket. The access switching relay is connected with the heating power supply. The access switching relay is connected with the SOC (ADUC834) which is connected with the photoelectric coupler which is connected with the relay driving audion which is connected with the access switching relay. The SOC (ADUC834) is connected with the polarity indicating light-emitting tube and connected with the sound alarming device. The instrument and method for rapidly detecting the polarity of the temperature-measuring thermal coupler has the advantages that the polarity of the thermal coupler product can be rapidly detected to judge whether the thermal coupler product is qualified or not; wasted products are prevented from flowing into the smelting and temperature measuring process and the efficiency of smelting production is improved.
Description
Technical field
The invention belongs to detection technique field, a kind of method and instrument of fast detecting temperature thermocouple product polarity is provided especially.
Technical background
What the sensor of temperature measurement system mainly adopted is thermopair.In metallurgical and coloured industry, in order to control the quality of motlten metal, all need to adopt the temperature measuring equipment take consumption-type thermal couple as sensor that the temperature of motlten metal is measured and controlled in each smelting stage.Therefore the demand of this consumption-type thermal couple is huge especially.The manufacturer that for this reason produces consumption-type thermal couple is also dispersed throughout all parts of the country.The manufacturer of these consumption-type thermal couples is manufacturing when thermopair for the product quality that improves thermopair reduces waste product, after thermo wires welding and thermopair all need before dispatching from the factory to its detect could be correct assembling and the qualification rate of assurance product.But how could check out the polarity correctness of thermopair? the method that the present invention proposes just can be checked out the polarity correctness of thermopair rapidly.By can be by underproof product sorting in manufacturing out to the detection of thermocouple polarity with this device, thereby improve the qualification rate of product of dispatching from the factory, this is all very important to thermopair manufacturer and thermopair user.
In the past in thermopair manufacturing plant, in order to grasp the exact connect ion of the thermocouple polarity that dispatches from the factory, after thermo wires welding, distinguished by strict putting with the thickness of eyesight observation thermo wires both positive and negative polarity.After because of carelessness the thermo wires order after welding being mixed up, be respectively very difficult by the method.Once the polarity of thermo wires is connect instead at assembled heat galvanic couple, use at the scene the quality that will cause thermometric failure and affect metal smelting.
In order to improve the qualification rate of thermopair product, alleviate workman's labour intensity, fast automatic detection thermopair product polarity just becomes the important technological problems that needs solve.
Summary of the invention
The object of the present invention is to provide a kind of instrument and method of fast detecting temperature thermocouple product polarity, by brand-new design, as long as plug thermopair on the thermopair socket of instrument, instrument just can detect thermocouple polarity correctness within a second.And shown and audible alarm by polarity pilot lamp.
Instrument of the present invention comprises that thermopair socket 2, path transfer relay 3, heating power supply 4, SOC (system on a chip) SOC (ADUC834) 5, photoelectrical coupler 6, relay drive triode 7, polarity indication light pipe 8, sonic alarm 9, working power 10(to see Fig. 1).Thermopair is connected with path transfer relay 3 by thermopair socket 2, path transfer relay 3 is connected with thermocouple wire heating power supply 4, path transfer relay 3 is connected with SOC (system on a chip) SOC (ADUC834) 5, SOC (system on a chip) SOC (ADUC834) 5 is connected with photoelectrical coupler 6, photoelectrical coupler 6 drives triode 7 to be connected with relay, relay drives triode 7 to be connected with path transfer relay 3, SOC (system on a chip) SOC (ADUC834) 5 is connected with polarity indication light pipe 8, and SOC (system on a chip) SOC (ADUC834) 5 is connected with sonic alarm 9.
According to thermopair operating characteristic: in the time that the measuring junction of thermopair and the reference edge of thermopair have temperature difference, will produce electromotive force in the loop of its connection.In this loop, if measure the positive and negative of this electromotive force, just can judge thermopair is just to access loop or reversal connection entry loop.Because having locating device between thermopair socket and thermopair, therefore when thermopair inserts after socket, if by transient heating thermopair, and then electromotive force in measuring circuit is positive and negative, thermocouple polarity is forward access loop, the electromotive force of surveying for negative, thermocouple polarity is oppositely to access loop, the electromotive force of surveying for just.Ultimate principle of the present invention that Here it is.
The method of the detection temperature thermocouple utmost point of the present invention is as follows:
The positive wire of thermopair socket 2 is received on the E point of path transfer relay 3, the negative wire of thermopair socket 2 is received on the F point of path transfer relay 3.The A point of path transfer relay 3 is received to the VCC end of heating power supply 4; The B point of path transfer relay 3 is received to the 0V end of heating power supply 4; The C point of path transfer relay 3 is received to the IN+ end of SOC (system on a chip) SOC (chip ADUC834) 5; The D point of path transfer relay 3 is received to the IN-end of SOC (system on a chip) SOC (chip ADUC834) 5; An extension line of path transfer relay 3 coils is received on the VCC of heating power supply 4; Another root extension line of path transfer relay 3 coils is received on the collector c of relay driving triode 7; Drive the emitter e of triode 7 to receive on the 0V of heating power supply 4 on relay; Drive the base stage b of triode 7 to receive the collector c that photoelectrical coupler 6 exports on relay upper, and connect a pull-up resistor at this tie point, the other end of resistance is received on the VCC of heating power supply 4.The emitter e that photoelectrical coupler 6 is exported is received on the 0V of heating power supply 4.The negative pole of the input side diode of photoelectrical coupler 6 is received on the GND of working power 10; The positive pole of the input side diode of photoelectrical coupler 6 is received on current-limiting resistance, and the other end of current-limiting resistance is received on the out1 of SOC (system on a chip) SOC (chip ADUC834) 5.The out2 of SOC (system on a chip) SOC (chip ADUC834) 5 is received by current-limiting resistance on the positive pole of polarity indication light diode (green) 8, and the negative pole of polarity indication light diode (green) 8 meets the GND of working power 10.By SOC (system on a chip) SOC(ADUC834) 5 out3 receives by current-limiting resistance on the positive pole of polarity indication light diode (redness) 8, and the negative pole of polarity indication light diode (redness) 8 meets the GND of working power 10; By SOC (system on a chip) SOC(ADUC834) 5 out4 receives on one end of sonic alarm 9, the GND of another termination working power 10 of sonic alarm 9; So far wiring completes.
The invention has the advantages that, the detection to thermopair product polarity fast, judges the whether qualified of thermopair product, prevents that waste product from flowing into smelting thermometric link, improves and smelt the efficiency of producing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.Wherein, thermopair socket 2, path transfer relay 3, heating power supply 4, SOC (system on a chip) SOC(ADUC834) 5, photoelectrical coupler 6, relay drive triode 7, polarity indication light pipe (red green each) 8, sonic alarm 9, working power 10.
Embodiment
To assemble a thermocouple polarity detector as example, illustrate that embodiments of the present invention are as follows:
1. be ready to thermopair 1 to be measured by figure, thermopair socket 2, path transfer relay 3, heating power supply 4, SOC (system on a chip) SOC(ADUC834) 5, photoelectrical coupler 6, relay drive triode 7, polarity indication light pipe (red green each) 8, sonic alarm 9, working power 10.
2. by figure, ready components and parts are fitted together, both the positive wire of thermopair socket 2 is received on the E point of path transfer relay 3, the negative wire of thermopair socket 2 is received on the F point of path transfer relay 3.The A point of path transfer relay 3 is received to the VCC end of heating power supply 4; The B point of path transfer relay 3 is received to the 0V end of heating power supply 4; The C point of path transfer relay 3 is received to the IN+ end of SOC (system on a chip) SOC (chip ADUC834) 5; The D point of path transfer relay 3 is received to the IN-end of SOC (system on a chip) SOC (chip ADUC834) 5; An extension line of path transfer relay 3 coils is received on the VCC of heating power supply 4; Another root extension line of path transfer relay 3 coils is received on the collector c of relay driving triode 7; Drive the emitter e of triode 7 to receive on the 0V of heating power supply 4 on relay; Drive the base stage b of triode 7 to receive the collector c that photoelectrical coupler 6 exports on relay upper, and connect a pull-up resistor at this tie point, the other end of resistance is received on the VCC of heating power supply 4.The emitter e that photoelectrical coupler 6 is exported is received on the 0V of heating power supply 4.The negative pole of the input side diode of photoelectrical coupler 6 is received on the GND of working power 10; The positive pole of the input side diode of photoelectrical coupler 6 is received on current-limiting resistance, and the other end of current-limiting resistance is received on the out1 of SOC (system on a chip) SOC (chip ADUC834) 5.The out2 of SOC (system on a chip) SOC (chip ADUC834) 5 is received by current-limiting resistance on the positive pole of polarity indication light diode (green) 8, and the negative pole of polarity indication light diode (green) 8 meets the GND of working power 10.By SOC (system on a chip) SOC(ADUC834) 5 out3 receives by current-limiting resistance on the positive pole of polarity indication light diode (redness) 8, and the negative pole of polarity indication light diode (redness) 8 meets the GND of working power 10; By SOC (system on a chip) SOC(ADUC834) 5 out4 receives on one end of sonic alarm 9, the GND of another termination working power 10 of sonic alarm 9; So far wiring completes.
3. at SOC (system on a chip) SOC(ADUC834) work out corresponding program to complete following function in 5;
(1) detect thermopair 1 to be measured and whether inject thermopair socket 2;
(2) need calorimetric galvanic couple 1 while injecting thermopair socket 2 when detecting, just send out the control signal of a 300ms width from output out1; This control signal is by the lumination of light emitting diode 300ms making in photoelectrical coupler 6, cause the output triode conducting in photoelectrical coupler 6, and then make relay drive triode 7 to end and the coil losing electricity magnetic force of path transfer relay 3 is disappeared, path transfer relay 3 moving contact E and F are connected by elastic traction and A and B.
So thermopair 1 to be measured forms loop with heating power supply 4, heating current is got back to 0V through VCC → A point → E point → thermopair 1 → F point → B point to be measured; Because the thermocouple wire in thermopair 1 to be measured is large compared with the resistance value of plain conductor and electrode, so the thermocouple wire in thermopair to be measured 1 produces a large amount of Joule heat (heating of both having switched on); SOC (system on a chip) SOC(ADUC834 after 300ms) 5 turn off the output of out1, light emitting diode in photoelectrical coupler 6 will extinguish, output triode in photoelectrical coupler 6 because of be not subject to light by, make relay drive the base stage b of triode 7 to be pulled into high level by pull-up resistor, so relay drives triode 7 conductings to make the coil of path transfer relay 3 obtain moving some E of electric generation magnetic attraction path transfer relay 3 and F to B and D, connects to SOC (system on a chip) SOC(ADUC834 by thermopair 1 to be measured) 5 IN+ and IN-.
(3) said process thermopair to be measured 1 and SOC (system on a chip) SOC(ADUC834 after completing) 5 form a measuring circuit.At this moment start the program of measuring thermoelectrical potential; If the thermoelectrical potential detecting for negative, to access measuring circuit be forward (both the polarity of thermopair for just) to thermopair 1 to be measured; If the thermoelectrical potential detecting is being for just, to access measuring circuit be reverse (both the polarity of thermopair is for bearing) to thermopair 1 to be measured; According to measurement result, control output out2 or out3 and make polarity indication light diode (red green each) 8 send ruddiness or green glow, to indicate the polarity correctness of thermopair 1 to be measured; When thermopair to be measured 1 polarity recording is when negative, also control output out4 to drive sonic alarm 9 sounding alarms.
When detect complete by thermopair 1 to be measured when thermopair socket 2 is pulled up, SOC (system on a chip) SOC(ADUC834) 5 turn off out2, out3, out4, send out1.Pick-up unit is got back to original state to be measured and is waited for measurement next time
Illustrate: why survey electromotive force be that canonical judges that thermocouple polarity is for anti-, and survey electromotive force be negative judgement thermocouple polarity for just? at this moment because in the time treating calorimetric galvanic couple 1 energising heating, the thermo wires of thermopair 1 to be measured has a solder joint being connected to electrode place.The resistance of electrode material is less than the resistance of thermo wires material.When heating in energising,, the thermo wires of this point generated heat at first, then heat penetration thermo wires progressively.Thermo wires after namely energising heating is actually the temperature of measuring junction lower than the temperature of reference edge.If be not difficult to draw according to the theory of thermoelectrical potential, the temperature of measuring junction in forward loop should be negative conclusion lower than the temperature loop electromotive force of reference edge, otherwise, in return circuit, if the temperature of measuring junction lower than the temperature of reference edge loop electromotive force just just should be.
Claims (3)
1. the instrument of a fast detecting temperature thermocouple polarity, it is characterized in that, comprise that thermopair socket (2), path transfer relay (3), heating power supply (4), SOC (system on a chip) SOC (ADUC834) (5), photoelectrical coupler (6), relay drive triode (7), polarity indication light pipe (8), sonic alarm (9), working power (10), thermopair is connected with path transfer relay (3) by thermopair socket (2), path transfer relay (3) is connected with hot heating power supply (4), path transfer relay (3) is connected to SOC (system on a chip) SOC (ADUC834) (5), SOC (system on a chip) SOC (ADUC834) (5) is connected with photoelectrical coupler (6), photoelectrical coupler (6) drives triode (7) to be connected with relay, relay drives triode (7) to be connected with path transfer relay (3), SOC (system on a chip) SOC (ADUC834) (5) is connected with polarity indication light pipe (8), SOC (system on a chip) SOC (ADUC834) (5) is connected with sonic alarm (9).
2. a method for fast detecting temperature thermocouple polarity, is characterized in that, step is as follows:
The positive wire of thermopair socket 2 is received on the E point of path transfer relay (3), by thermopair socket, (2 negative wire is received on the F point of path transfer relay 3; The A point of path transfer relay (3) is received to the VCC end of heating power supply (4); The B point of path transfer relay (3) is received to the 0V end of heating power supply (4); The C point of path transfer relay (3) is received to the IN+ end of SOC (system on a chip) SOC (ADUC834) 5; The D point of path transfer relay (3) is received to the IN-end of SOC (system on a chip) SOC (ADUC834) (5); An extension line of path transfer relay (3) coil is received on the VCC of heating power supply (4); Another root extension line of path transfer relay (3) coil is received on the collector c of relay driving triode (7); Drive the emitter e of triode (7) to receive on the 0V of heating power supply 4 on relay; Drive the base stage b of triode (7) to receive on the collector c of photoelectrical coupler (6) outgoing side on relay, and connect a pull-up resistor at this tie point, the other end of pull-up resistor is received on the VCC of heating power supply (4); The emitter e of photoelectrical coupler 6 outgoing sides is received on the 0V of heating power supply (4); The negative pole of the input side diode of photoelectrical coupler (6) is received on the GND of working power (10); The positive pole of the input side diode of photoelectrical coupler (6) is received and driven on resistance, drive the other end of resistance to receive on the out1 of SOC (system on a chip) SOC (ADUC834) (5); The out2 of SOC (system on a chip) SOC (ADUC834) (5) is received by current-limiting resistance on the positive pole of green LED of polarity indication light pipe (8), the negative pole of the green LED of polarity indication light pipe (8) meets the GND of working power (10); The out3 of SOC (system on a chip) SOC (ADUC834) (5) is received by current-limiting resistance on the positive pole of polarity indication light pipe (8) red LED, the negative pole of polarity indication light pipe (8) red LED meets the GND of working power (10); The out4 of SOC (system on a chip) SOC (ADUC834) (5) is received on one end of sonic alarm (9) to the GND of another termination working power (10) of sonic alarm 9.
3. method according to claim 2, is characterized in that, in SOC (system on a chip) SOC (ADUC834) (5), the corresponding program of establishment is to complete following function;
1) detect thermopair 1 to be measured and whether inject thermopair socket (2);
2) need calorimetric galvanic couple (1) while injecting thermopair socket 2 when detecting, just send out the control signal of a 300ms width from the output out1 of SOC (system on a chip) SOC (ADUC834) (5); This control signal will make the lumination of light emitting diode 300ms in photoelectrical coupler (6), cause the output triode conducting in photoelectrical coupler (6), and then make relay drive triode (7) to end and the coil losing electricity magnetic force of path transfer relay (3) is disappeared, moving contact E and F are by elastic traction and A and the connection of B point;
So thermopair to be measured (1) forms loop with heating power supply (4), heating current is got back to 0V through VCC → A point → E point → thermopair to be measured → F point → B point; Because thermocouple wire is large compared with the resistance value of plain conductor and electrode, so thermocouple wire produces a large amount of Joule heats; The output that after 300ms, SOC (system on a chip) SOC (ADUC834) (5) turns off out1, light emitting diode in photoelectrical coupler (6) will extinguish, outgoing side triode in photoelectrical coupler 6 because of be not subject to light by, make relay drive the b utmost point of triode (7) to be pulled into high level by pull-up resistor, so relay drives triode (7) conducting make the coil of path transfer relay (3) obtain electric and produce moving some E of magnetic attraction path transfer relay (3) and F to B and D, connects to IN+ and the IN-of SOC (system on a chip) SOC (ADUC834) (5) by thermopair;
3) said process after completing thermopair to be measured (1) and SOC (system on a chip) SOC (ADUC834) (5) formed a measuring circuit; At this moment start the program of measuring thermoelectrical potential; If the thermoelectrical potential detecting for negative, thermopair access measuring circuit is forward, both the polarity of thermopair was for just; If the thermoelectrical potential detecting is for just, thermopair access measuring circuit is oppositely, and both the polarity of thermopair is for bearing; According to measurement result, SOC (system on a chip) SOC (ADUC834) (5) controls output out2 or out3 makes polarity indication light pipe (8) send ruddiness and green glow, to indicate the polarity correctness of thermopair to be measured (1); When the thermocouple polarity recording is when negative, SOC (system on a chip) SOC (ADUC834) 5 also controls output out4 with driving sonic alarm (9) sounding alarm;
4) when detect complete by thermopair to be measured (1) when thermopair socket (2) is pulled up, SOC (system on a chip) SOC (ADUC834) (5) turns off out2, out3, out4, sends out1; Make pick-up unit get back to original state to be measured and wait for measurement next time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031967.6A CN103837793B (en) | 2014-01-23 | 2014-01-23 | Instrument and method for rapidly detecting polarity of temperature-measuring thermal coupler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410031967.6A CN103837793B (en) | 2014-01-23 | 2014-01-23 | Instrument and method for rapidly detecting polarity of temperature-measuring thermal coupler |
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| CN103837793B CN103837793B (en) | 2017-02-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104802383A (en) * | 2015-03-25 | 2015-07-29 | 上海怡恺电子科技有限公司 | Thermocouple protection device for hot runner of injection mold |
| CN114135409A (en) * | 2021-11-02 | 2022-03-04 | 潍柴动力股份有限公司 | Fault judgment method and device |
| RU2780703C2 (en) * | 2020-07-13 | 2022-09-29 | Акционерное общество "Опытное Конструкторское Бюро Машиностроения имени И.И. Африкантова" (АО "ОКБМ Африкантов") | Method for control of polarity of thermoelectrodes |
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| CN104802383A (en) * | 2015-03-25 | 2015-07-29 | 上海怡恺电子科技有限公司 | Thermocouple protection device for hot runner of injection mold |
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| RU2780703C2 (en) * | 2020-07-13 | 2022-09-29 | Акционерное общество "Опытное Конструкторское Бюро Машиностроения имени И.И. Африкантова" (АО "ОКБМ Африкантов") | Method for control of polarity of thermoelectrodes |
| CN114135409A (en) * | 2021-11-02 | 2022-03-04 | 潍柴动力股份有限公司 | Fault judgment method and device |
| CN114135409B (en) * | 2021-11-02 | 2023-07-18 | 潍柴动力股份有限公司 | Fault judging method and device |
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| CN103837793B (en) | 2017-02-15 |
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