Continuity inspection device

Patent metadata

Field	Value
Publication number	US-9989577-B2
Application number	US-201514710021-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	Nov 14, 2012
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

In this continuity inspection device, a reference electrode plate held at ground potential is disposed along an intermediate portion of electric wires to be inspected for continuity, and a discharge path (positive charge leaking path) for static electricity charged on the electric wires after the continuity inspection is secured by the reference electrode plate. Thus, accumulation of static electricity after the continuity inspection on electric wires is avoided. Moreover, the electric potential of the static electricity charged on the electric wires by application of voltage to power supplying probes is measured by measuring equipment as the absolute potential with respect to the ground potential of the reference electrode plate through the surface potential of the terminals of the electric wires. Thus, the electric potential of the static electricity of the electric wires is accurately measured without being affected by cross talk due to stray capacitance between the electric wires.

First claim

What is claimed is:

1. A continuity inspection device for inspecting a continuity state of an electric wire having a first terminal at one end side and a second terminal at the other end side, comprising:
a first probe opposed to the first terminal in a non-contact state;
a second probe opposed to the second terminal in a non-contact state;
a reference electrode plate placed along an intermediate portion of the electric wire;
a power supply unit configured to apply voltage to the first probe so as to charge static electricity on the wire; and
a measuring device configured to measure surface potential of the second terminal through the second probe while keeping the electric wire charged in a state where potential of the reference electrode plate is fixed to potential lower than that of the voltage applied to the probe,
the continuity state of the electric wire being inspected based on a result of the measurement.

2. The continuity inspection device according to claim 1 , wherein potential of the reference electrode plate is ground potential.

3. The continuity inspection device according to claim 1 , wherein the reference electrode plate is formed into a U-shape.

4. The continuity inspection device according to claim 3 , wherein the reference electrode plate includes a bottom wall and a pair of side walls opposing each other.

5. The continuity inspection device according to claim 4 , wherein a distance between the electric wire in the reference electrode plate and the reference electrode plate is less than 30 mm.

6. The continuity inspection device according to claim 1 , wherein a length of the reference electrode plate along an axis direction of the electric wire is less than a length of the electric wire.

7. A continuity inspection device for inspecting continuity states of a plurality of electric wires each having a first terminal at one end side and a second terminal at the other end side, comprising:
a plurality of first probes opposed to the first terminals in a non-contact state;
a plurality of second probes opposed to the second terminals in a non-contact state;
a reference electrode plate placed along intermediate portions of the plurality of electric wires,
a power supply unit configured to apply voltage to one of the first probes so as to charge static electricity on the electric wire; and
a measuring device configured to measure surface potential of one of the second terminals or one or more second terminals including the second terminal of the electric wire corresponding to at least one of the first probes is measured through one of the second probes while keeping the electric wire charged,
the continuity states of the plurality of electric wires being inspected based on a result of the measurement.

8. The continuity inspection device according to claim 7 , wherein potential of the reference electrode plate is ground potential.

9. The continuity inspection device according to claim 7 , wherein the reference electrode plate is formed into a U-shape.

10. The continuity inspection device according to claim 9 , wherein the reference electrode plate includes a bottom wall and a pair of side walls opposing each other.

11. The continuity inspection device according to claim 10 , wherein a distance between the plurality of electric wires in the reference electrode plate and the reference electrode plate is less than 30 mm.

12. The continuity inspection device according to claim 7 , wherein a length of the reference electrode plate along an axis direction of the plurality of electric wires is less than a length of the plurality of electric wires.

Assignees

• Yazaki Corp

Inventors

• Mabuchi Miyoshi

Classifications

• G01R31/52

  Testing for short-circuits, leakage current or ground faults · CPC title

• G01R31/69 Primary

  of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances · CPC title

• G01R31/58

  Testing of lines, cables or conductors (testing of electric windings G01R31/72) · CPC title

• G01R31/026 Primary

  Physics · mapped topic

• G01R31/045

  Physics · mapped topic