JPS54134050A - Monitoring method and apparatus for welding current - Google Patents
Monitoring method and apparatus for welding currentInfo
- Publication number
- JPS54134050A JPS54134050A JP4226778A JP4226778A JPS54134050A JP S54134050 A JPS54134050 A JP S54134050A JP 4226778 A JP4226778 A JP 4226778A JP 4226778 A JP4226778 A JP 4226778A JP S54134050 A JPS54134050 A JP S54134050A
- Authority
- JP
- Japan
- Prior art keywords
- welding current
- vth
- circuit
- sampling
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To enhance greatly the monitoring performance by the procedure in which sampling is made only for a desired cycle area of welding current and then the cumulative average value of welding current for the sampling area is compared with a predetermined value.
CONSTITUTION: At the welding current detection circuit 1, only desired cycle area of welding current is detected. The window type comparator 5 receives as input the DC voltages VTH1 and VTH2 to give sampling starting and finishing signals and sends out the signal H only for the electrification cycle number corresponding to staircase output contained between VTH1 and VTH2. At the division circuit IV, the average value of welding current in sampling area is obtained. Only when the DC voltages V1U and V1L corresponding to the upper and lower limit values of welding current and the output G of the one shot circuit 11 become H as a criterion value at the comparator circuit V, the switch circuit 13 is closed and the output of the division circuit 12 is compared at the comparator 14.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4226778A JPS54134050A (en) | 1978-04-10 | 1978-04-10 | Monitoring method and apparatus for welding current |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4226778A JPS54134050A (en) | 1978-04-10 | 1978-04-10 | Monitoring method and apparatus for welding current |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54134050A true JPS54134050A (en) | 1979-10-18 |
JPS5637037B2 JPS5637037B2 (en) | 1981-08-28 |
Family
ID=12631254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4226778A Granted JPS54134050A (en) | 1978-04-10 | 1978-04-10 | Monitoring method and apparatus for welding current |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54134050A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0764495A1 (en) * | 1995-09-20 | 1997-03-26 | Miyachi Technos Corporation | Inverter seam resistance welding electric power supply apparatus |
JP2012533975A (en) * | 2009-07-15 | 2012-12-27 | インテグレイテッド・デザインズ・リミテッド・パートナーシップ | System and method for determining pump pressure based on motor current |
-
1978
- 1978-04-10 JP JP4226778A patent/JPS54134050A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0764495A1 (en) * | 1995-09-20 | 1997-03-26 | Miyachi Technos Corporation | Inverter seam resistance welding electric power supply apparatus |
US5866866A (en) * | 1995-09-20 | 1999-02-02 | Miyachi Technos Corporation | Inverter seam resistance welding electric power supply apparatus |
CN1074965C (en) * | 1995-09-20 | 2001-11-21 | 宫地技术株式会社 | Inverter seam resistance welding electric power supply apparatus |
JP2012533975A (en) * | 2009-07-15 | 2012-12-27 | インテグレイテッド・デザインズ・リミテッド・パートナーシップ | System and method for determining pump pressure based on motor current |
Also Published As
Publication number | Publication date |
---|---|
JPS5637037B2 (en) | 1981-08-28 |
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