Circuit board inspection device
First Claim
Patent Images
1. A circuit board inspection device for inspecting operation of a circuit board having a predetermined part or wire formed therein, comprising:
- a supporting substrate disposed substantially in parallel with a parts mounting surface of the circuit board; and
a signal change detection unit disposed in a position of the supporting substrate corresponding to the part or wire of the circuit board, with the supporting substrate being disposed substantially in parallel with the circuit board.
1 Assignment
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Accused Products
Abstract
A circuit board inspection device for inspecting the operation of a circuit board having a predetermined part or wire formed therein includes a supporting substrate disposed substantially in parallel with the parts mounting surface of the circuit board, and a signal change detection unit made of a coil or a capacitor disposed in a position of the supporting substrate corresponding to the part or wire of the circuit board, with the supporting substrate being disposed substantially in parallel with the circuit board.
18 Citations
46 Claims
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1. A circuit board inspection device for inspecting operation of a circuit board having a predetermined part or wire formed therein, comprising:
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a supporting substrate disposed substantially in parallel with a parts mounting surface of the circuit board; and
a signal change detection unit disposed in a position of the supporting substrate corresponding to the part or wire of the circuit board, with the supporting substrate being disposed substantially in parallel with the circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A failure diagnosis method for diagnosing existence of a failure in a portion to be diagnosed, such as wiring of a circuit board or a part mounted on the circuit board, comprising the steps of:
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reading an induction voltage generated in a magnetic field sensing portion when a magnetic flux generated from a current flowing through the portion to be diagnosed is passed through a winding wire of a spiral coil functioning as the magnetic field sensing portion; and
comparing the read induction voltage with a normal induction voltage measured in advance, to thereby diagnose existence of a failure in the portion to be diagnosed;
wherein the spiral coil as the magnetic field sensing portion is placed so as to be opposed to the portion to be diagnosed, to have a magnetic path length substantially equal to or smaller than a width of the portion to be diagnosed, and to be disposed perpendicularly and fixedly to a direction of the current flowing through the portion to be diagnosed.
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34. A failure diagnosis system for diagnosing existence of a failure in a portion to be diagnosed, such as wiring of a circuit board or a part mounted on the circuit board, comprising:
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a spiral coil functioning as a magnetic field sensing portion, opposed to the portion to be diagnosed, having a magnetic path length substantially equal to or smaller than a width of the portion to be diagnosed, and disposed perpendicularly and fixedly to a direction of a current flowing through the portion to be diagnosed; and
a failure diagnosis portion for diagnosing existence of a failure in the portion to be diagnosed by reading an induction voltage generated in the magnetic field sensing portion when a magnetic flux generated from the current flowing through the portion to be diagnosed is passed through a winding wire of the spiral coil functioning as the magnetic field sensing portion and by comparing the read induction voltage with a normal induction voltage measured in advance. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. A printed wiring board for use in a failure diagnosis system for diagnosing existence of a failure in a portion to be diagnosed, such as wiring of a circuit board or a part mounted on the circuit board, comprising:
a spiral coil functioning as a magnetic field sensing portion, opposed to a portion to be diagnosed, having a magnetic path length substantially equal to or smaller than a width of the portion to be diagnosed, and further disposed perpendicularly and fixedly to a direction of a current flowing through the portion to be diagnosed. - View Dependent Claims (42, 43, 44, 45, 46)
Specification