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US 2003/0117159 A1Published application
Impedance measuring device for printed wiring board
AssigneeMicrocraft KK
InventorYorio Hidehira
Life of this patent
Estimating the term…
Abstract
The present invention provides an impedance measuring device for a printed wiring board. The device include an appropriate probe unit to locate measuring points on the printed wiring board. The probe unit has a probe with contact styli to be contacted with the measurement points. The probe is moved to make an arrangement of the contact styli matching the pattern of the measurement points.
Claims20
A probe unit for measuring impedance for a printed wiring board, comprising:
- a probe having a first and a second contact styli to be contacted with a first and a second predetermined points on the printed wiring board, the styli being fixed to the probe with a resilient member;
- a turn disk having a turn center and a first position on a board-side face of the turn disk, the probe being disposed at the first position;
- a turn device for turning the turn disk around the turn center such that the probe turns so that the contact styli turn substantially parallel to a measurement face of the printed wiring board;
- and
- a moving device for moving the probe toward the measurement face of the printed wiring board such that the first and second contact styli are contacted with the predetermined points;
- wherein the turn disk has a second position at which the probe can be disposed by being shifted from the first position and;
- wherein the first position is farther from the turn center than the second position such that the probe is turned with a larger radius of curvature at the first position.
4 more elements
A probe unit for measuring impedance for a printed wiring board, comprising:
- a probe having a connecting portion and a first and a second contact styli to be contacted with a first and a second predetermined points on the printed wiring board;
- a turn disk having a turn center and a mounting position, on which the probe is mounted with the connecting portion being fixed to the mounting position at a first angle relative to the turn disk;
- a turn device for turning the turn disk around the turn center such that the probe turns so that the contact styli turn substantially parallel to a measurement face of the printed wiring board;
- and
- a moving device for moving the probe toward the measurement face of the printed wiring board such that the first and second contact styli are contacted with the predetermined points;
- wherein the probe can be mounted on the mounting position such that the connecting portion is fixed to the mounting position at a second angle relative to the turn disk;
- and
- wherein at least one distance between the turn center and one of the styli is changed by fixing the connecting portion of the probe at the second angle.
5 more elements
A control system for a impedance measuring device for a printed wiring board, comprising:
- an impedance measuring part which measure a characteristic impedance of the printed wiring board to be measured;
- a main control unit controlling movement of a probe unit having a probe with a contact stylus to be contacted with a predetermined point on the printed wiring board, the probe unit comprising a probe device which changes a position of the probe;
- and
- an input-output device receiving a signal from a sensor and controlling a relay;
- wherein the main control unit controls integrally the probe device.
2 more elements
Dependencies are inferred from the claim text.