CN107576839A - Welding equipment, weldingvoltage detection method and device - Google Patents
Welding equipment, weldingvoltage detection method and device Download PDFInfo
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- CN107576839A CN107576839A CN201710839162.8A CN201710839162A CN107576839A CN 107576839 A CN107576839 A CN 107576839A CN 201710839162 A CN201710839162 A CN 201710839162A CN 107576839 A CN107576839 A CN 107576839A
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Abstract
The disclosure provides a kind of welding equipment, weldingvoltage detection method and weldingvoltage detection means, is related to welding technology field.The weldingvoltage detection method of the disclosure, for the voltage sampling circuit of welding equipment, the weldingvoltage detection method includes：Measure the resistance and inductance of voltage sampling circuit；Measure the electric current and current changing rate of voltage sampling circuit；Basic voltage is determined according to resistance and electric current；Loss voltage is determined according to inductance and current changing rate；Weldingvoltage is determined according to basic voltage and loss voltage.
Description
Technical field
This disclosure relates to welding technology field, in particular to a kind of welding equipment, weldingvoltage detection method and weldering
Connect voltage check device.
Background technology
Electric arc welding is a kind of very common welds types, mainly using heat caused by arc discharge by welding rod or
Welding wire melts with workpiece, weld seam is formed after the cooling period, so as to realize the connection of the face of weld.In welding process, weldingvoltage, welding
The welding parameters such as electric current are directly related to welding quality, therefore, it is necessary to welding parameters are detected, to be welding equipment reality
The functions such as existing waveform control, the judgement of short-circuit arcing provide data and supported.It is general in existing welding equipment for weldingvoltage
The voltage sampling circuit for gathering weldingvoltage is equipped with, to monitor weldingvoltage in real time.
Existing voltage sampling circuit is typically by isolating devices such as linear optical coupling or current transformers in voltage acquisition
Buffer action is played in circuit, isolating device output voltage is simultaneously amplified by amplifying circuit, can calculate amplifying circuit output
Voltage and a predetermined coefficient product, using the product and a deviation sum as weldingvoltage.
But because voltage sample point is longer to the distance between the isolating device on voltage collection circuit, and voltage is adopted
There is resistance and inductance in collector, can produce certain loss so that pass through the weldingvoltage that prior art determines and actual electricity
Relatively large deviation between pressure be present.When welding equipment realizes the functions such as waveform control, the judgement of short-circuit arcing using the weldingvoltage, hold
Easily there is mistake, be unfavorable for improving welding quality.
It should be noted that information is only used for strengthening the reason to the background of the disclosure disclosed in above-mentioned background section
Solution, therefore can include not forming the information to prior art known to persons of ordinary skill in the art.
The content of the invention
The purpose of the disclosure is to provide a kind of welding equipment, weldingvoltage detection method and weldingvoltage detection means,
And then one or more problem caused by the limitation of correlation technique and defect is at least overcome to a certain extent.
According to an aspect of this disclosure, there is provided a kind of weldingvoltage detection method, the voltage sample for welding equipment
Circuit, the weldingvoltage detection method include：
Measure the resistance and inductance of the voltage sampling circuit；
Measure the electric current and current changing rate of the voltage sampling circuit；
Basic voltage is determined according to the resistance and the electric current；
Loss voltage is determined according to the inductance and the current changing rate；
Weldingvoltage is determined according to the basic voltage and the loss voltage.
In a kind of exemplary embodiment of the disclosure, the basic voltage is the product of the resistance and the electric current.
In a kind of exemplary embodiment of the disclosure, the loss voltage is the inductance and the current changing rate
Product.
In a kind of exemplary embodiment of the disclosure, the weldingvoltage detection method also includes：
Offset voltage is determined, the offset voltage is equal to voltage deviation of the voltage sampling circuit when zero inputs.
In a kind of exemplary embodiment of the disclosure, the weldingvoltage is equal to the basic voltage, the loss electricity
Pressure and the offset voltage sum.
In a kind of exemplary embodiment of the disclosure, the weldingvoltage is equal to the basic voltage and the loss electricity
Press sum.
In a kind of exemplary embodiment of the disclosure, the resistance and inductance that measure the voltage sampling circuit are starting to weld
Carried out before connecing.
In a kind of exemplary embodiment of the disclosure, the voltage collection circuit includes isolation circuit and amplifying circuit,
The input of the isolation circuit is connected with the output circuit of the welding equipment, and the output end of the isolation circuit is put with described
The input connection of big circuit, the output end of the amplifying circuit are connected with the control circuit of the welding equipment.
According to an aspect of this disclosure, there is provided a kind of weldingvoltage detection means, the voltage sample for welding equipment
Circuit, the weldingvoltage detection means include：
First measuring unit, for measuring the resistance and inductance of the voltage sampling circuit；
First measuring unit, for measuring the electric current and current changing rate of the voltage sampling circuit；
Computing unit, for determining basic voltage according to the resistance and the electric current, and according to the inductance and described
Current changing rate determines loss voltage, and determines weldingvoltage according to the basic voltage and the loss voltage.
According to an aspect of this disclosure, there is provided a kind of welding equipment, including voltage collection circuit and above-mentioned any one
Described weldingvoltage detection means.
Welding equipment, weldingvoltage detection method and the weldingvoltage detection means of the disclosure, because basic voltage is root
Determined according to the resistance and electric current of voltage sampling circuit, and it is the inductance and curent change according to voltage collection circuit that voltage, which is lost,
What rate determined, so as to take into account the influence of the resistance and inductance of sample circuit to weldingvoltage simultaneously, compared to prior art
The mode of the weldingvoltage of middle determination, virtual voltage is more nearly according to the weldingvoltage that basic voltage and loss voltage determine,
The deviation between virtual voltage can be reduced, the follow-up function being easy to as welding equipment provides more accurate weldingvoltage data,
Be advantageous to improve welding quality.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.It should be evident that drawings in the following description are only the disclosure
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the schematic diagram of the voltage collection circuit of welding equipment.
Fig. 2 is the flow chart of the embodiment of weldingvoltage detection method one of the disclosure.
Fig. 3 is the flow chart of another embodiment of weldingvoltage detection method of the disclosure.
Fig. 4 is the block diagram of the embodiment of weldingvoltage detection means one of the disclosure.
Fig. 5 is the block diagram of another embodiment of weldingvoltage detection means of the disclosure.
The weldingvoltage that Fig. 6 is detected by the weldingvoltage that weldingvoltage detection method detects in Fig. 3 with prior art
Schematic diagram.
Embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, knot
Structure or characteristic can be incorporated in one or more embodiments in any suitable manner.In the following description, there is provided permitted
More details fully understand so as to provide to embodiment of the present disclosure.It will be appreciated, however, by one skilled in the art that can
Omitted with putting into practice the technical scheme of the disclosure one or more in the specific detail, or others side can be used
Method, constituent element, device, step etc..In other cases, be not shown in detail or describe known solution a presumptuous guest usurps the role of the host to avoid and
So that each side of the disclosure thickens.
In addition, accompanying drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.Identical accompanying drawing mark in figure
Note represents same or similar part, thus will omit repetition thereof.Some block diagrams shown in accompanying drawing are work(
Can entity, not necessarily must be corresponding with physically or logically independent entity.These work(can be realized using software form
Energy entity, or these functional entitys are realized in one or more hardware modules or integrated circuit, or at heterogeneous networks and/or place
These functional entitys are realized in reason device device and/or microcontroller device.
Term "one", " one ", "the" and " described " to represent to exist one or more elements/part/etc.；With
Language " comprising " and " having " to represent it is open be included look like and refer to key element/composition portion except listing
Also may be present outside divide/waiting other key element/part/etc.；Term " first ", " second " etc. only use as mark, no
It is the quantity limitation to its object.
A kind of weldingvoltage detection method is provided in disclosure example embodiment, for a welding equipment, the welding is set
Standby can be the arc-welding equipments such as arc welder.The welding equipment can include voltage sampling circuit, control circuit and output
Circuit.As shown in figure 1, the voltage collection circuit can include isolation circuit 101 and amplifying circuit 102, isolation circuit 101 and put
Big circuit 102 can have input and output end.The input of isolation circuit 101 can connect with the output circuit of welding equipment
Connect, for measuring the voltage of welding equipment output, the output end of isolation circuit 101 can be connected with the input of amplifying circuit 102,
The output end of amplifying circuit 102 can be connected with the control circuit of welding equipment, and the control circuit can include AD sample circuits, every
Voltage can be isolated from circuit 101 and be exported to amplifying circuit 102, is amplified by amplifying circuit 102.
Certainly, welding equipment can also include other circuits or part, specifically refer to existing welding equipment, herein not
It is described in detail again.
As shown in Fig. 2 the weldingvoltage detection method of this example embodiment can include：
Step S110, the resistance and inductance of the voltage sampling circuit are measured；
Step S120, the electric current and current changing rate of the voltage sampling circuit are measured；
Step S130, basic voltage is determined according to the resistance and the electric current；
Step S140, loss voltage is determined according to the inductance and the current changing rate；
Step S150, weldingvoltage is determined according to the basic voltage and loss voltage.
The weldingvoltage detection method of disclosure example embodiment, it is determined that during weldingvoltage, while it take into account and adopt
Influence of the resistance and inductance of sample circuit to weldingvoltage, compared to the mode of the weldingvoltage determined in the prior art, according to
The weldingvoltage that basic voltage and loss voltage determine is more nearly virtual voltage, inclined between virtual voltage so as to reduce
Difference, the follow-up function being easy to as welding equipment provide more accurate weldingvoltage data, are advantageous to improve welding quality.Such as figure
Shown in 6, the solid line A in Fig. 6 show the waveform of the weldingvoltage measured in the prior art, and this example is called shown in dotted line B and is implemented
The waveform for the weldingvoltage that the weldingvoltage detection method of mode measures, solid line A and dotted line part B overlap, and part is misaligned.
Below, each step of the weldingvoltage detection method in this example embodiment will be further detailed.
In step s 110, the resistance and inductance of the voltage sampling circuit are measured.
Before being welded, the device detection welding that can be used for detection resistance by ohmmeter, universal meter etc. is set
The resistance of standby voltage sampling circuit；It is of course also possible to the voltage sampling circuit is measured by the methods of genuine standard and bridge method
Resistance, will not enumerate herein.Wherein, genuine standard is to utilize voltmeter, ammeter and power meter measures resistance, for three
The concrete mode of table method and bridge method refers to prior art, will not be described in detail herein.
Meanwhile before being welded, the device that can be used for detecting inductance by inductance measuring meter etc. detects voltage
The inductance of sample circuit, the inductance are the equivalent inductance of voltage collection circuit.It is of course also possible to by Maxwell bridge etc. its
Its mode measures the inductance of voltage sampling circuit, will not enumerate herein.
In step S120, the electric current and current changing rate of the measurement voltage sampling circuit.
During progress is welded, because the output of electric current and amplifying circuit is linear, so can be adopted by AD
The result of sample circuit sampling carries out linear change and obtains above-mentioned electric current, specifically refers to prior art, will not be described in detail herein.Or
Person, the electric current of the device detection voltage sampling circuit of electric current can be detected by universal meter, pincerlike meter etc..It is of course also possible to
The electric current of voltage sampling circuit is detected by other manners such as external special current detection circuits, no longer arranged one by one herein
Lift.
Meanwhile during progress is welded, linear change can be carried out by the sampled result of AD sample circuits and obtained
Electric current is stated, then can calculate the difference of the electric current at any two moment, can by the time interval of the difference divided by two moment
Obtain the variable quantity of electric current in the unit interval, i.e. current changing rate.Or can also by current change rate meter or it is other etc. can
Detect the current changing rate of the device detection voltage sampling circuit of current changing rate.It is of course also possible to pass through special detection electricity
The other manners such as road detect the current changing rate of voltage sampling circuit, will not enumerate herein.
In step s 130, basic voltage is determined according to the resistance and the electric current.
Basic voltage can be the product of voltage sampling circuit resistance and electric current, i.e. u1=R0×i0, wherein：U1Based on
Voltage, R0For the resistance of voltage sampling circuit, i0For the electric current of voltage sampling circuit.
In step S140, loss voltage is determined according to the inductance and the current changing rate.
Loss voltage can be the inductance of voltage sampling circuit and the product of current changing rate, i.e.,Its
In：U2For voltage, L is lost0For the inductance of voltage sampling circuit,For the current changing rate of voltage sampling circuit.
In step S150, weldingvoltage is determined according to the basic voltage and loss voltage.
Weldingvoltage can be basic voltage and voltage sum, i.e. u=u is lost1+u2, u is weldingvoltage, specifically：
Thus, influence of the inductance to weldingvoltage for ignoring voltage sampling circuit can be avoided, with basic voltage and loss electricity
Press sum, compared to the weldingvoltage measured in the prior art, the deviation between virtual voltage can be reduced, just as weldingvoltage
More accurate weldingvoltage data are provided in the control for welding equipment, are advantageous to improve welding quality.
In another example embodiment of the disclosure, as shown in figure 3, weldingvoltage detection method can also include step
S160。
In step S160, offset voltage is determined, the offset voltage is equal to the voltage sampling circuit when zero inputs
Voltage deviation.
When voltage sampling circuit zero inputs, that is, before being welded, universal meter, voltmeter or other electricity can be passed through
The voltage of detection means detection voltage sampling circuit is pressed, institute's value is voltage deviation, can be as offset voltage.Or
Person, it can also determine voltage deviation when zero inputs after considering the influence of the factors such as temperature, device aging, can be made
For offset voltage, the voltage deviation can be that experimental data can also be empirical data.It is it is, of course, also possible to true using other manner
Fixed above-mentioned offset voltage, specifically refer to the side for determining voltage deviation of the voltage sampling circuit when zero inputs in the prior art
Formula, it will not enumerate herein.
Weldingvoltage can be equal to basic voltage, loss voltage and offset voltage sum, i.e. u=u1+u2+ M, u are welding electricity
Pressure, M is offset voltage.Specifically：
Voltage deviation may be 0, i.e., in the absence of voltage deviation, it is also possible to non-zero numerical value, specifically using measured result as
It is accurate.
Thus, influence of the inductance to weldingvoltage for ignoring voltage sampling circuit can be avoided, meanwhile, utilize offset voltage pair
Voltage deviation of the voltage sampling circuit when zero inputs is compensated, and further reduces the weldingvoltage and virtual voltage measured
Between deviation, the control being easy to as welding equipment provides more accurate weldingvoltage, is advantageous to improve welding quality.
Following is apparatus of the present invention embodiment, can be used for performing the inventive method embodiment.Filled for the present invention
The details not disclosed in embodiment is put, refer to the inventive method embodiment.
Disclosure example embodiment additionally provides a kind of weldingvoltage detection means, the voltage sample for welding equipment
Circuit, the voltage sampling circuit refer to voltage collection circuit above, will not be repeated here.
As shown in figure 4, the weldingvoltage detection means of this example embodiment can include the first measuring unit 1, second
Measuring unit 2 and computing unit 3.
In this example embodiment, the first measuring unit 1 can be used for measuring above-mentioned voltage sampling circuit resistance and
Inductance；
In this example embodiment, the first measuring unit 2 can be used for measuring above-mentioned voltage sampling circuit electric current and
Current changing rate；
In this example embodiment, computing unit 3 can be used for determining basic voltage according to above-mentioned resistance and electric current, and
Loss voltage is determined according to above-mentioned inductance and current changing rate, and weldingvoltage is determined according to basic voltage and loss voltage.
In another example embodiment of the disclosure, as shown in figure 5, weldingvoltage detection means can also include the 3rd
Measuring unit 4, it can be used for measuring offset voltage, the offset voltage is equal to voltage of the voltage sampling circuit when zero inputs
Deviation.
The detail of each unit is in corresponding weldingvoltage detection method in above-mentioned weldingvoltage detection means
It is described in detail, therefore, here is omitted.
Disclosure example embodiment additionally provides a kind of welding equipment, including voltage collection circuit and any of the above-described
Weldingvoltage detection means.
The beneficial effect of the welding equipment of this example embodiment refers to the beneficial effect of above-mentioned weldingvoltage detection method
Fruit, it will not be repeated here.
It should be noted that although some units of the equipment performed for method are referred in above-detailed, still
This division is not enforceable.In fact, according to embodiment of the present disclosure, the spy of two or more above-described units
Function of seeking peace can embody in a module or unit.Conversely, the feature and function of an above-described unit can
To be further divided into being embodied by multiple modules or unit.
In addition, although describing each step of method in the disclosure with particular order in the accompanying drawings, still, this does not really want
These steps must be performed according to the particular order by asking or implying, or the step having to carry out shown in whole could be realized
Desired result.It is additional or alternative, it is convenient to omit some steps, multiple steps are merged into a step and performed, and/
Or a step is decomposed into execution of multiple steps etc..
Through the above description of the embodiments, those skilled in the art is it can be readily appreciated that example described herein is implemented
Mode can be realized by software, can also be realized by way of software combines necessary hardware.Therefore, according to the disclosure
The technical scheme of embodiment can be embodied in the form of software product, the software product can be stored in one it is non-volatile
Property storage medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) in or network on, including some instructions are to cause a calculating
Equipment (can be personal computer, server, mobile terminal or network equipment etc.) is performed according to disclosure embodiment
Method.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.The application is intended to any modification, purposes or the adaptations of the disclosure, these modifications, purposes or
Person's adaptations follow the general principle of the disclosure and including the undocumented common knowledges in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the disclosure and spirit are by appended
Claim is pointed out.
Claims (10)
1. a kind of weldingvoltage detection method, the voltage sampling circuit for welding equipment, it is characterised in that the weldingvoltage
Detection method includes：
Measure the resistance and inductance of the voltage sampling circuit；
Measure the electric current and current changing rate of the voltage sampling circuit；
Basic voltage is determined according to the resistance and the electric current；
Loss voltage is determined according to the inductance and the current changing rate；
Weldingvoltage is determined according to the basic voltage and the loss voltage.
2. weldingvoltage detection method according to claim 1, it is characterised in that the basic voltage be the resistance and
The product of the electric current.
3. weldingvoltage detection method according to claim 1, it is characterised in that it is described loss voltage be the inductance and
The product of the current changing rate.
4. the weldingvoltage detection method according to any one of claims 1 to 3, it is characterised in that the weldingvoltage inspection
Survey method also includes：
Offset voltage is determined, the offset voltage is equal to voltage deviation of the voltage sampling circuit when zero inputs.
5. weldingvoltage detection method according to claim 4, it is characterised in that the weldingvoltage is equal to the basis
Voltage, the loss voltage and the offset voltage sum.
6. the weldingvoltage detection method according to any one of claims 1 to 3, it is characterised in that described weldingvoltage etc.
In the basic voltage and the loss voltage sum.
7. weldingvoltage detection method according to claim 1, it is characterised in that measure the electricity of the voltage sampling circuit
Resistance and inductance are carried out before welding is started.
8. weldingvoltage detection method according to claim 1, it is characterised in that the voltage collection circuit includes isolation
Circuit and amplifying circuit, the input of the isolation circuit are connected with the output circuit of the welding equipment, the isolation circuit
Output end be connected with the input of the amplifying circuit, the control electricity of the output end of the amplifying circuit and the welding equipment
Road connects.
9. a kind of weldingvoltage detection means, the voltage sampling circuit for welding equipment, it is characterised in that the weldingvoltage
Detection means includes：
First measuring unit, for measuring the resistance and inductance of the voltage sampling circuit；
First measuring unit, for measuring the electric current and current changing rate of the voltage sampling circuit；
Computing unit, for determining basic voltage according to the resistance and the electric current, and according to the inductance and the electric current
Rate of change determines loss voltage, and determines weldingvoltage according to the basic voltage and the loss voltage.
10. a kind of welding equipment, it is characterised in that including the weldingvoltage detection described in voltage collection circuit and claim 9
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839162.8A CN107576839A (en) | 2017-09-18 | 2017-09-18 | Welding equipment, weldingvoltage detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839162.8A CN107576839A (en) | 2017-09-18 | 2017-09-18 | Welding equipment, weldingvoltage detection method and device |
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| Publication Number | Publication Date |
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| CN107576839A true CN107576839A (en) | 2018-01-12 |
Family
ID=61035978
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| CN201710839162.8A Pending CN107576839A (en) | 2017-09-18 | 2017-09-18 | Welding equipment, weldingvoltage detection method and device |
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Cited By (1)
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|---|---|---|---|---|
| CN109799429A (en) * | 2018-12-14 | 2019-05-24 | 唐山松下产业机器有限公司 | Arcing condition judgement method and device |
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