Test device

Patent metadata

Field	Value
Publication number	US-12517175-B2
Application number	US-202218280744-A
Country	US
Kind code	B2
Filing date	Jan 5, 2022
Priority date	Mar 9, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

Disclosed is a test device. The test device according to an embodiment of the present invention is operated by a power supply unit provided to be portable, and tests a sensor device using an alternating current of a high frequency. Therefore, the portability and operation reliability of the test device are improved, and the convenience of use can be improved since a separate wire member or the like for the operation of the test device need not be provided.

First claim

The invention claimed is:

1 . A test device comprising:
a power source portion that supplies a direct current; a control portion conductively connected to the power source portion to convert the direct current into first alternating current; a coil portion conductively connected to the control portion to form a first magnetic field using the first alternating current; and an energization portion in electromagnetic communication with the coil portion on a first side and defining a space portion on a second side, opposite to the first side, the energization portion configured to produce a second alternating current via the first magnetic field and a second magnetic field via the second alternating current to induce a third alternating current via the second magnetic field in a harvesting coil of a sensor device when the sensor device is inserted into the space portion, wherein the third alternating current is configured to power the sensor device to measure an environmental value, the environmental value selected from the group consisting of: a temperature; a humidity; a dust concentration; and a pressure.

2 . The test device of claim 1 , wherein the coil portion is wound around the energization portion.

3 . The test device of claim 2 , wherein a plurality of coil portions are provided, and the plurality of coil portions are wound around the energization portion at different positions.

4 . The test device of claim 1 , wherein the energization portion comprises:
a coil coupling portion around which the coil portion is wound, the coil coupling portion extending in a first direction; a first arm portion extending in a second direction, perpendicular to the first direction, from a first side of the coil coupling portion; second arm portion extending in the second direction from a second side of the coil coupling portion, opposite to the first side; a first protruding portion extending in the first direction from the first arm portion; a second protruding portion extending towards the first protruding portion in the first direction from the second arm portion, wherein the space portion is defined between the first protruding portion and the second protruding portion, wherein the energization portion forms the second alternating current using the first magnetic field induced on the energization portion by the coil portion to produce the second magnetic field using the second alternating current.

5 . The test device of claim 4 , wherein the energization portion is formed of a ferromagnetic body.

6 . The test device of claim 1 , wherein the control portion comprises:
a control board that converts the direct current into the first alternating current; a power conducting wire conductively connecting the control board and the power source portion to each other; and a coil conducting wire conductively connecting the control board and the coil portion to each other.

7 . The test device of claim 6 , wherein the control portion comprises a switch having a portion thereof exposed to an outside of a housing in which the control portion is accommodated and being connected to the control board to receive a control signal for operating the control board.

8 . The test device of claim 1 , wherein the power source portion is provided with a rechargeable battery.

9 . The test device of claim 1 , further comprising:
a housing provided with a space therein accommodating the control portion, the coil portion, and the energization portion.

10 . The test device of claim 9 , wherein the housing comprises:
a body portion accommodating the control portion, the coil portion, and a part of the energization portion; and an extension portion continuously extending to the body portion to accommodate a remaining part of the energization portion, the extension portion being disposed to extend from the body portion.

11 . The test device of claim 10 , wherein a plurality of extension portions are provided, and the plurality of extension portions are spaced apart from each other and disposed to face each other, and the housing comprises a sensor insertion portion, which is a space partially surrounded by the body portion and the plurality of extension portions.

12 . The test device of claim 1 , wherein:
the coil portion defines the first magnetic field with a first field direction; the energization portion defines the second magnetic field with a second field direction, perpendicular to the first field direction; and the third alternating current induces a third magnetic field via the harvesting coil having a third field direction, substantially parallel to the second field direction.

Assignees

• Ls Electric Co Ltd

Inventors

• Kim Kihyeon

Classifications

• G01R33/02 Primary

  Measuring direction or magnitude of magnetic fields or magnetic flux (G01R33/20 takes precedence) · CPC title

• G01R19/18

  using conversion of DC into AC, e.g. with choppers · CPC title

• G01R19/15

  Indicating the presence of current · CPC title

• G01R15/181

  using coils without a magnetic core, e.g. Rogowski coils · CPC title

• G01R1/30

  Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier · CPC title