Touch sensing system

Patent metadata

Field	Value
Publication number	US-11527374-B2
Application number	US-202016832565-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

Provided is a touch sensing system that can make the life of a contact of an electromagnetic contactor longer. A touch sensing system includes a main operation circuit that connects a probe and a main operation power supply, and in which an electromagnetic contactor is provided; and a touch sensing circuit that is connected to the main operation circuit through the electromagnetic contactor in a branched manner, and connects the probe and a touch sensing power supply, is which a solid state relay switch is provided in the touch sensing circuit.

First claim

What is claimed is:

1. A touch sensing system comprising:
a main operation circuit that connects a probe and a main operation power supply, and in which an electromagnetic contactor is provided; and
a touch sensing circuit that is connected to the main operation circuit through the electromagnetic contactor in a branched manner, and connects the probe and a touch sensing power supply,
wherein a solid state relay switch is provided in the touch sensing circuit.

2. The touch sensing system according to claim 1 , wherein a main operation is arc welding.

3. The touch sensing system according to claim 2 , wherein the touch sensing power supply is a power supply of 200 V or more.

4. The touch sensing system according to claim 3 , further comprising a touch sensing control unit,
wherein the touch sensing control unit includes:
a sensing number setting unit that sets a total number of search start points;
a probe operation control unit that controls an operation of the probe;
a search start position setting unit that sets a search start position;
a touch enable command output unit that controls the electromagnetic contactor;
a touch sensing command output unit that controls the solid state relay switch; and
a limit distance setting/detection unit that sets a limit distance between the probe and an object for touch sensing, and detects a distance between the probe and the object upon movement of the probe according to the probe operation control unit.

5. The touch sensing system according to claim 2 , further comprising a touch sensing control unit,
wherein the touch sensing control unit includes:
a sensing number setting unit that sets a total number of search start points;
a probe operation control unit that controls an operation of the probe;
a search start position setting unit that sets a search start position;
a touch enable command output unit that controls the electromagnetic contactor;
a touch sensing command output unit that controls the solid state relay switch; and
a limit distance setting/detection unit that sets a limit distance between the probe and an object for touch sensing, and detects a distance between the probe and the object upon movement of the probe according to the probe operation control unit.

6. The touch sensing system according to claim 1 , wherein the touch sensing power supply is a power supply of 200 V or more.

7. The touch sensing system according to claim 6 , further comprising a touch sensing control unit,
wherein the touch sensing control unit includes:
a sensing number setting unit that sets a total number of search start points;
a probe operation control unit that controls an operation of the probe;
a search start position setting unit that sets a search start position;
a touch enable command output unit that controls the electromagnetic contactor;
a touch sensing command output unit that controls the solid state relay switch; and
a limit distance setting/detection unit that sets a limit distance between the probe and an object for touch sensing, and detects a distance between the probe and the object upon movement of the probe according to the probe operation control unit.

8. The touch sensing system according to claim 1 , further comprising a touch sensing control unit,
wherein the touch sensing control unit includes:
a sensing number setting unit that sets a total number of search start points;
a probe operation control unit that controls an operation of the probe;
a search start position setting unit that sets a search start position;
a touch enable command output unit that controls the electromagnetic contactor;
a touch sensing command output unit that controls the solid state relay switch; and
a limit distance setting/detection unit that sets a limit distance between the probe and an object for touch sensing, and detects a distance between the probe and the object upon movement of the probe according to the probe operation control unit.

9. The touch sensing system according to claim 1 , the solid state relay switch being separate from the electromagnetic contactor.

10. The touch sensing system according to claim 1 , the touch sensing circuit connecting the probe and the touch sensing power supply to detect contact between the probe and a workpiece.

Assignees

• Fanuc Corp

Inventors

• Yanagita Akihiro
• Tsumura Takeshi
• Hasegawa Takahisa

Classifications

• B23K9/0956

  using sensing means, e.g. optical · CPC title

• G05B19/401

  characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes (G05B19/19 takes precedence) · CPC title

• B23K9/095 Primary

  Monitoring or automatic control of welding parameters · CPC title

• H01H47/22 Primary

  for supplying energising current for relay coil · CPC title

• H01H47/001

  Functional circuits, e.g. logic, sequencing, interlocking circuits · CPC title