CN1323791C - Welding machine fault detecting and protecting system, and its method - Google Patents
Welding machine fault detecting and protecting system, and its method Download PDFInfo
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- CN1323791C CN1323791C CNB2004100159122A CN200410015912A CN1323791C CN 1323791 C CN1323791 C CN 1323791C CN B2004100159122 A CNB2004100159122 A CN B2004100159122A CN 200410015912 A CN200410015912 A CN 200410015912A CN 1323791 C CN1323791 C CN 1323791C
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000003466 welding Methods 0.000 title abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 230000003139 buffering effect Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000011896 sensitive detection Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 240000000233 Melia azedarach Species 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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Abstract
The present invention provides a welding machine fault detecting and protecting system and a used method. The welding machine fault detecting and protecting system is orderly connected with a fault signal collecting circuit for collecting a fault signal of the system, a signal latching circuit for receiving the fault signal from the fault signal collecting circuit and carrying out buffering, power amplification and latching, a signal processing circuit for receiving the signal from the signal latching circuit, detecting and determining signal fault and a displaying circuit for displaying fault information. The welding machine fault detecting and protecting system of the present invention has the advantages of simpleness, reliability, sensitive detection of the fault state of a welding machine, detection and determination of fault type, effective protection of the welding machine and reduction of the maintenance difficulty of the welding machine. The present invention is characterized in that by using simple hardware, the fault can be detected reliably and effectively, output information can protect a site welding parameter, and the great damage caused by the fault can be avoided.
Description
Technical field
The method that the present invention relates to the fault detect of welding machine and protection system and adopted, the method that relates in particular to a kind of digitized welder fault detection and protection system and adopted.
Background technology
The fault detect of existing welding machine and protection system adopt the analog detection system, and this system is subjected to the performance impact of element big, and the uniformity of system is poor.
Summary of the invention
Technical problem to be solved by this invention provides a kind of digitized welder fault detection and protection system and method thereof, and it can detect the fault type of welding machine effectively and diagnose, and the output relevant information is for maintenance personal's reference.
In order to solve the problems of the technologies described above, the present invention has adopted following technical proposals: provide a kind of welder fault to detect and protection system, it is characterized in that, comprising: circuit connects successively: the fault-signal Acquisition Circuit, it is used for the fault-signal of acquisition system; Signal latch circuit, it receives from the go forward side by side row buffering power amplification and latching of the fault-signal of fault collection circuit; Signal processing circuit, receive signal, detect and determine signal fault from signal latch circuit; Display circuit, it shows fault message.
The present invention also provides a kind of welder fault to detect and guard method, comprises the steps:
1) the fault-signal Acquisition Circuit is gathered and the output fault-signal;
2) signal latch circuit receives described fault-signal, cushions through buffer circuit earlier, improves power, is input to then in the locking trigger, lock then trigger export a signal through or outputs level signals behind the door;
3) signal processing circuit detects the position of system bus driver according to the level signal of output, thereby and determine fault type;
4) display circuit output and show described fault message.
Welder fault detection of the present invention and protection system are simple, reliable, and welder fault state-detection sensitivity can detect definite fault type, effectively protects welding machine, and has reduced the maintenance difficulty of welding machine.This characteristic feature of an invention be the simple hardware that adopts can be reliably effective detection failure, and output information, the welding parameter that can keep the scene intact can be avoided because the heavy losses that fault causes.
Description of drawings
Fig. 1 is the physical circuit figure of fault-signal Acquisition Circuit of the present invention.
Fig. 2 is the physical circuit figure of signal latch circuit of the present invention.
Fig. 3 is the physical circuit figure of signal processing circuit of the present invention and display circuit.
Fig. 4 is a method of work flow chart of the present invention.
The specific embodiment
Welder fault of the present invention detects and protection system comprises: the fault-signal Acquisition Circuit 1 of Lian Jieing successively, signal latch circuit 2, signal processing circuit 3, display circuit 4.
As shown in Figure 1: fault-signal Acquisition Circuit 1 of the present invention comprises: overvoltage signal acquisition circuit 11, heat alarm Acquisition Circuit 12, under-voltage signal acquisition circuit 13, over-current signal Acquisition Circuit 14.Because above-mentioned sample circuit is prior art, repeats no more here.
As shown in Figure 2: overcurrent, overvoltage, under-voltage signal that signal latch circuit 2 of the present invention receives from fault-signal Acquisition Circuit 1, it comprises:
Six homophase buffer converters 4050,3,5,7 pins of described overcurrent, overvoltage, under-voltage signal input homophase buffer converter cushion and power amplification, to avoid the distortion of signal;
Four input R-S (three-state) locking triggers 4043 could be removed the pulse that has preserved the front when it has only new pulse to arrive, and latch fault signal in this circuit does not fall useful signal, guarantees the reliability of whole system.
Three inputs or door 4075; its input can connect 3 signals; signal of output after process or the logic; in native system, adopted or door 4075 for the economize on hardware cost; butt welding machine overcurrent, overvoltage, fault such as under-voltage, overheated can both work the mischief by butt welding machine; promptly must take safeguard measure, thereby adopt or logic, select for use or door 4075 any one fault.
Because overcurrent, overvoltage, under-voltage signal are subjected to external disturbance easily, may cause error signal, therefore the validity of signal is diagnosed by latching link, strengthened the reliability of system.Often open the form that thermistor is connected to ground and the collection of heat alarm adopted, low level is effective, antijamming capability is strong, so need not to pass through the signal latch link, has saved hardware cost.
Each signal inputs to signal processing circuit and display circuit after signal latch circuit, as shown in Figure 3: it comprises micro computer 80C196KC, micro computer 80C196KC is that INTEL Corp. adopts the manufacturing of CHMOS technology, has fast operation, disposal ability is strong, characteristics such as rich interface become control system ideal control chip.Be integrated with the EPROM of 16K byte, 488 byte register arrays, 20 interrupt sources are arranged, 3 pulsewidth modulations (PWM) output, 4 hsi port HSI, 6 high-speed output hsos, 4 16 software timers, 8 passage bands sampling---10 A/D converters of maintenance, full duplex serial port, house dog and high-frequency clock and I/O system etc., compare with 80C196KB, the 80C196KC not only capacity of internal storage has enlarged one times, has expanded input/output port (as having increased by 2 PWM mouths), also increase a peripheral hardware task server PTS (Peripheral TransactionServer) newly, greatly reduced the expense of break in service.In addition, it can adopt the crystal oscillator of 16MHz, and the speed of service is than the 80C196KB of 12MHz fast 33%.This provides great convenience to system's design and the upgrading and the expansion of control system from now on.Native system adopts this chip to detect, discern and export the relevant information tracing trouble as the fault of main control chip butt welding machine, fault-signal is input among the system bus driver 74LS244 of micro computer 80C196KC through after the signal latch circuit, 80C196KC reads the state of this chip and discerns fault type, P1.1 by micro computer, P1.2, the special-purpose display chip MAX7219 of P1.3 mouth line traffic control serial shows.
Described display circuit MAX7219 is integrated serial input common cathode display driver, this interface microprocessor can drive eight seven hop count font LED or bar graph display or 64 independent LED, native system adopts this chip to consider that hardware is simple, reduce cost, native system adopts this chip drives seven seven hop count fonts LED and eight independently emitting led indications as the course of work to use.
In conjunction with shown in Figure 4: protection system of the present invention can be discerned overcurrent, overvoltage, the under-voltage and overheating fault of welding machine; the source of trouble is different; but signal sample circuit is similar substantially, is that example illustrates that the course of work of the present invention is as follows so only lift overvoltage Fault Identification principle:
The permission voltage of welding machine operate as normal is 340～420; when being higher than 420, voltage just thinks overvoltage; shown in the overvoltage signal sample circuit; optocoupler U5 does not work during operate as normal; in case overvoltage; the 1 pin voltage of optocoupler U5 is higher than the voltage of 2 pin; the optocoupler conducting; through output overvoltage signal OV after resistance R 3 dividing potential drops; this signal is input to signal latch circuit; promptly cushion through six homophase buffer converters 4050 earlier, improve power, be input to then in the locking trigger 4043; lock then and move with micro computer after trigger 4043 is exported signal process or door 4075 back output high level signals process system bus driver 74LS244 bus driver; the overvoltage fault flag when detecting the 2nd when high, is then put in the position of micro computer detection system bus driver 74LS244; after time-delay detects and determines; the welding parameter that keeps the scene intact is passed through P1.0; P1.1; P1.2 control display driver MAX7219 shows fault message, shows that overvoltage information is: " OV-----".
Claims (5)
1, a kind of welder fault detects and protection system, it is characterized in that, comprising: circuit connects successively: fault-signal Acquisition Circuit (1), it is used for the fault-signal of acquisition system;
Signal latch circuit (2), it receives from the go forward side by side row buffering power amplification and latching of the fault-signal of fault collection circuit (1);
Signal processing circuit (3), receive signal, detect and determine signal fault from signal latch circuit;
Display circuit (4) shows fault message;
Described signal latch circuit (2) comprising: the buffer circuit, locking trigger and or the door that connect of circuit successively.
2, welder fault according to claim 1 detects and protection system, it is characterized in that described signal processing circuit comprises micro computer and system bus driver.
3, welder fault according to claim 1 detects and protection system, it is characterized in that, described display circuit adopts integrated serial input common cathode display driver.
4, welder fault according to claim 1 detects and protection system; it is characterized in that described fault-signal Acquisition Circuit (1) comprising: overvoltage signal acquisition circuit (11), heat alarm Acquisition Circuit (12), under-voltage signal acquisition circuit (13), over-current signal Acquisition Circuit (14).
5, a kind of welder fault detects and guard method, it is characterized in that, comprises the steps:
1) the fault-signal Acquisition Circuit is gathered and the output fault-signal;
2) signal latch circuit receives described fault-signal, cushions through buffer circuit earlier, improves power, is input to then in the locking trigger, lock then trigger export a signal through or outputs level signals behind the door;
3) signal processing circuit detects the position of system bus driver according to the level signal of output, thereby and determine fault type;
4) display circuit output and show described fault message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100159122A CN1323791C (en) | 2004-01-16 | 2004-01-16 | Welding machine fault detecting and protecting system, and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100159122A CN1323791C (en) | 2004-01-16 | 2004-01-16 | Welding machine fault detecting and protecting system, and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1640611A CN1640611A (en) | 2005-07-20 |
| CN1323791C true CN1323791C (en) | 2007-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100159122A Expired - Fee Related CN1323791C (en) | 2004-01-16 | 2004-01-16 | Welding machine fault detecting and protecting system, and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1323791C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1158009A (en) * | 1997-08-07 | 1999-03-02 | Matsushita Electric Ind Co Ltd | Arc welding equipment |
| CN2320362Y (en) * | 1997-12-12 | 1999-05-26 | 成都发动机公司 | Welding current constant-current controller for resistance welder |
| CN1371777A (en) * | 2002-04-04 | 2002-10-02 | 上海工程技术大学 | Digital signal control system for microbeam plasma welding machine |
| JP2002361418A (en) * | 2001-04-09 | 2002-12-18 | Lincoln Global Inc | System and method for controlling electric arc welder |
-
2004
- 2004-01-16 CN CNB2004100159122A patent/CN1323791C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1158009A (en) * | 1997-08-07 | 1999-03-02 | Matsushita Electric Ind Co Ltd | Arc welding equipment |
| CN2320362Y (en) * | 1997-12-12 | 1999-05-26 | 成都发动机公司 | Welding current constant-current controller for resistance welder |
| JP2002361418A (en) * | 2001-04-09 | 2002-12-18 | Lincoln Global Inc | System and method for controlling electric arc welder |
| CN1371777A (en) * | 2002-04-04 | 2002-10-02 | 上海工程技术大学 | Digital signal control system for microbeam plasma welding machine |
Non-Patent Citations (1)
| Title |
|---|
| 单片机控制多功能逆变焊机研究(一)——控制系统硬件设计 李鹤岐，李芳，田坤，尤志春，徐德进，电焊机，第33卷第10期 2003 * |
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| Publication number | Publication date |
|---|---|
| CN1640611A (en) | 2005-07-20 |
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Address after: 201204 Shanghai city Pudong New Area Beicai Industrial Park No. 33 Lianlinlu Patentee after: Shanghai Weiteli Welding Equipment Manufacturing Co., Ltd. Address before: 201204 Shanghai city Pudong New Area Beicai Industrial Park No. 33 Lianlinlu Patentee before: Weiteli Welding Equipment Manufacturing Co., Ltd., Shanghai |
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Addressee: Zhu Dansheng Document name: Notice of termination of patent right |
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Granted publication date: 20070704 Termination date: 20210116 |