Measuring method and measuring system

A measuring method executed by one or a plurality of processors to measure a state of a weld zone formed when a weld piece is welded to a weld workpiece, the measuring method comprising:

• a first adjustment step of adjusting a contact position of a third contactor and a fourth contactor;
• a second adjustment step of adjusting a contact position of a first contactor and a second contactor so that an interval between the first contactor and the second contactor is smaller than an interval between the third contactor and the fourth contactor;
• a supply step of supplying a constant current between the third contactor and the fourth contactor;
• and
• a detection step of detecting a voltage between the first contactor and the second contactor, wherein
• in the first adjustment step, the third contactor contacts the weld workpiece, and the fourth contactor contacts the weld piece or contacts another weld workpiece welded to the weld piece so as to be separated from the weld workpiece,
• in the second adjustment step, the first contactor contacts the weld workpiece so as to be closer to the weld zone than the third contactor is, and the second contactor contacts the weld piece so as to be closer to the weld zone than the fourth contactor is, and
• the first contactor contacts the weld workpiece at a position on a surface of the weld workpiece so that a distance from the weld piece is equal to or less than half a distance to a position farthest from the weld piece, and the second contactor contacts the weld piece at a position on a surface of the weld piece so that a distance from the weld workpiece is equal to or less than half a distance to a position farthest from the weld workpiece.

A measuring system that measures a state of a weld zone formed when a weld piece is welded to a weld workpiece, the measuring system comprising:

• an adjustment apparatus that adjusts a contact position of a first contactor and a second contactor and adjusts a contact position of a third contactor and a fourth contactor so that an interval between the third contactor and the fourth contactor is larger than an interval between the first contactor and the second contactor;
• a supply circuit that supplies a constant current between the third contactor and the fourth contactor;
• and
• a detection circuit that detects a voltage between the first contactor and the second contactor,
• wherein the adjustment apparatus is configured to
• bring the first contactor into contact with the weld workpiece and bring the second contactor into contact with the weld piece, and
• bring the third contactor into contact with the weld workpiece so as to be separated from the weld zone more than the first contactor is, and bring the fourth contactor into contact with the weld piece so as to be separated from the weld zone more than the second contactor is or bring the fourth contactor into contact with another weld workpiece welded to the weld piece so as to be separated from the weld workpiece, and
• the first contactor is brought into contact with the weld workpiece at a position on a surface of the weld workpiece so that a distance from the weld piece is equal to or less than half a distance to a position farthest from the weld piece, and the second contactor is brought into contact with the weld piece at a position on a surface of the weld piece so that a distance from the weld workpiece is equal to or less than half a distance to a position farthest from the weld workpiece.

A measuring system that measures a state of a weld zone formed when a weld piece is welded to a weld workpiece, the measuring system comprising:

• an adjustment apparatus that adjusts a contact position of a third contactor and a fourth contactor and adjusts a contact position of a first contactor and a second contactor so that an interval between the first contactor and the second contactor is smaller than an interval between the third contactor and the fourth contactor;
• a supply circuit that supplies a constant current between the third contactor and the fourth contactor;
• and
• a detection circuit that detects a voltage between the first contactor and the second contactor,
• wherein the adjustment apparatus is configured to
• bring the third contactor into contact with the weld workpiece and bring the fourth contactor into contact with the weld piece or bring the fourth contactor into contact with another weld workpiece welded to the weld piece so as to be separated from the weld workpiece, and
• bring the first contactor closer to the weld zone than the third contactor is to bring the first contactor into contact with the weld workpiece, and bring the second contactor closer to the weld zone than the fourth contactor is to bring the second contactor into contact with the weld piece, and
• the first contactor is brought into contact with the weld workpiece at a position on a surface of the weld workpiece so that a distance from the weld piece is equal to or less than half a distance to a position farthest from the weld piece, and the second contactor is brought into contact with the weld piece at a position on a surface of the weld piece so that a distance from the weld workpiece is equal to or less than half a distance to a position farthest from the weld workpiece.