Measuring apparatus, on-chip instrumentation device and measuring method
US-12181278-B2 · Dec 31, 2024 · US
Voltage detection device
US9459291B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9459291-B2 |
| Application number | US-201214426547-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 3, 2012 |
| Priority date | Dec 3, 2012 |
| Publication date | Oct 4, 2016 |
| Grant date | Oct 4, 2016 |
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- Title
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Abstract
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A voltage detection device is such that an intermediate electrode is provided between a central conductor to which a voltage is applied and a grounded tank to constitute a voltage divider and detects a voltage of the central conductor on the basis of a voltage of the voltage divider. The voltage detection device includes an integration circuit to which a voltage of the voltage divider, which is an output of the voltage divider, is input, an analog circuit that amplifies an output voltage of the integration circuit to a specified amplitude, an amplifier/attenuator to which a voltage of the voltage divider, which is an output of the voltage divider, is input and that amplifies or attenuates the voltage of the voltage divider to the specified amplitude, and an adder that adds an output voltage of the analog circuit and an output voltage of the amplifier/attenuator.
First claim
Opening claim text (preview).
The invention claimed is: 1. A voltage detection device in which an intermediate electrode is provided between a central conductor to which a voltage is applied and a grounded tank to constitute a voltage divider, and that detects a voltage of the central conductor on a basis of a voltage of the voltage divider, the device comprising: an integration circuit to which a voltage of the voltage divider is input, the voltage divider having a high-pass filter characteristic formed by a stray capacitance between the central conductor and the intermediate electrode, an earth capacitance between the central conductor and the tank, and a voltage dividing resistor connected in parallel with the earth capacitance; a first gain adjusting unit that amplifies an output voltage of the integration circuit to a specified amplitude; a second gain adjusting unit to which a voltage of the voltage divider is input and that amplifies or attenuates the voltage of the voltage divider to the specified amplitude; and an adder that adds an output voltage of the first gain adjusting unit and an output voltage of the second gain adjusting unit. 2. The voltage detection device according to claim 1 , wherein each of the integration circuit, the first gain adjusting unit, the second gain adjusting unit, and the adder is configured from an analog circuit, and the voltage detection device further comprises an A/D converter to which an output voltage of the adder is input.
Assignees
Inventors
Classifications
- G01R19/0007Primary
Frequency selective voltage or current level measuring (measuring frequency G01R23/00; testing attenuation in line transmission systems H04B3/48; monitoring testing in transmission systems H04B17/00) · CPC title
- G01R15/06Primary
having reactive components, e.g. capacitive transformer · CPC title
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- What does patent US9459291B2 cover?
- A voltage detection device is such that an intermediate electrode is provided between a central conductor to which a voltage is applied and a grounded tank to constitute a voltage divider and detects a voltage of the central conductor on the basis of a voltage of the voltage divider. The voltage detection device includes an integration circuit to which a voltage of the voltage divider, which is…
- Who is the assignee on this patent?
- Matsumoto Daigo, Fujii Shigeo, Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R19/0007. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 04 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).