High-voltage power source device and notification method

Patent metadata

Field	Value
Publication number	US-11143716-B2
Application number	US-201716466721-A
Country	US
Kind code	B2
Filing date	Dec 8, 2017
Priority date	Dec 13, 2016
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A high-voltage power source device includes: a first terminal connected to a first end of an electrical wire disposed around a predetermined region; a second terminal connected to a second end of the electrical wire; a high-voltage generation circuit connected to the first terminal and generating high-voltage electricity; a voltage detection circuit connected to the second terminal, and measuring a voltage value of the high-voltage electricity at the second terminal and determining presence of an abnormality in the electrical wire, based on a measured voltage value; a timing circuit instructing the high-voltage generation circuit to generate high-voltage electricity at a timing when the high-voltage electricity is generated, and sending an instruction to measure a voltage value of the high-voltage electricity at the second terminal to the voltage detection circuit; and a notification circuit for notifying a determination result of the voltage detection circuit to outside.

First claim

What is claimed is:

1. A high-voltage power source device comprising:
a first terminal connected to a first end of an electrical wire disposed around a predetermined region;
a second terminal connected to a second end of the electrical wire;
a high-voltage generation circuit configured to generate high-voltage electricity, the high-voltage generation circuit being connected to the first terminal;
a voltage detection circuit configured to measure a voltage value of the high-voltage electricity at the second terminal, and determining whether an abnormality is present in the electrical wire, based on a measured voltage value, the voltage detection circuit being connected to the second terminal;
a timing circuit configured to instruct the high-voltage generation circuit to generate the high-voltage electricity at a timing when the high-voltage electricity is generated, and send an instruction to measure a voltage value of the high-voltage electricity at the second terminal to the voltage detection circuit; and
a notification circuit configured to notify an external device of a determination result of the voltage detection circuit.

2. The high-voltage power source device according to claim 1 , wherein
the voltage detection circuit
determines that an abnormality occurs in the electrical wire in a case where a voltage value of the high-voltage electricity at the second terminal is lower than a predetermined threshold.

3. The high-voltage power source device according to claim 2 , further comprising a terminal waveform analysis circuit configured to analyze a voltage waveform of the high-voltage electricity at each of the first terminal and the second terminal, the terminal waveform analysis circuit being connected to each of the first terminal and the second terminal.

4. The high-voltage power source device according to claim 3 , wherein
the terminal waveform analysis circuit
calculates a temporal difference between a time when a voltage waveform of the high-voltage electricity at the first terminal is detected and a time when a voltage waveform of the high-voltage electricity at the second terminal is detected, and
detects whether an abnormality occurs in the electrical wire.

5. The high-voltage power source device according to claim 3 , wherein
the terminal waveform analysis circuit
calculates, when detecting a sudden voltage change in a voltage waveform of the high-voltage electricity at the first terminal, a period from a time when the high-voltage electricity is started to be applied to the first terminal till a time when the sudden voltage change is detected, and calculates, based on a calculated period, a length of the electrical wire from the first terminal to a location where an abnormality occurs.

6. The high-voltage power source device according to claim 5 , wherein
the terminal waveform analysis circuit
determines that the electrical wire is disconnected in a case where the sudden voltage change detected in a voltage waveform of the high-voltage electricity at the first terminal is an increase in voltage, and
determines that the electrical wire is grounded in a case where the sudden voltage change is a decrease in voltage.

7. The high-voltage power source device according to claim 1 , further comprising:
a switching circuit configured to switch a terminal for outputting the high-voltage electricity generated by the high-voltage generation circuit, between the first terminal and the second terminal; and
a switching control circuit configured to control the switching circuit in such a way that, in a case where the voltage detection circuit determines that an abnormality is present in the electrical wire, a terminal for outputting the high-voltage electricity generated by the high-voltage generation circuit is alternately switched between the first terminal and the second terminal.

8. The high-voltage power source device according to claim 7 , further comprising
a third terminal connected to a location other than an end of the electrical wire, wherein
the switching control circuit
controls the switching circuit, in a case where the voltage detection circuit determines that an abnormality occurs in the electrical wire, in such a way as to switch a terminal for outputting the high-voltage electricity generated by the high-voltage generation circuit among the first terminal, the second terminal, and the third terminal, and
the switching circuit
switches a terminal for outputting the high-voltage electricity generated by the high-voltage generation circuit among the first terminal, the second terminal, and the third terminal.

9. A notification system comprising:
the high-voltage power source device according to claim 1 ; and
the electrical wire.

10. A notification method comprising:
instructing, by a timing circuit, a high-voltage generation circuit to generate high-voltage electricity at a timing when the high-voltage electricity is generated,
applying, by the high voltage generation circuit, the high-voltage electricity from a first terminal side connected to a first end of an electrical wire disposed around a predetermined region;
sending, by the timing circuit, an instruction to measure a voltage value of the high-voltage electricity at the second terminal to a voltage detection circuit
measuring, by the voltage detection circuit, a voltage value of the high-voltage electricity at a second terminal connected to a second end of the electrical wire;
determining, by the voltage detection circuit, whether an abnormality is present in the electrical wire, based on a measured voltage value measured at the second terminal; and
notifying, by the voltage detection circuit, an external device of a determination result of the determining.

Assignees

• Nec Platforms Ltd

Inventors

• Nobutaka Yasushi
• Endoh Kunihiko

Classifications

• G01R31/58 Primary

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

• G01R31/088

  Aspects of digital computing · CPC title

• G01R31/11

  using pulse reflection methods · CPC title

• G05F1/10

  Regulating voltage or current  (G05F1/02 takes precedence) · CPC title

• A01M29/24

  using electric or magnetic effects, e.g. electric shocks, magnetic fields or microwaves · CPC title