Fault diagnosis apparatus
First Claim
1. A fault diagnosis apparatus for diagnosing a fault that occurs in an apparatus having a plurality of drive mechanisms each including a driving component activated by current supply and a power transmission component that transmits a driving force of the driving component to another component which does not receive current supply, comprising:
- a second signal detection unit that detects a second signal indicating an operation state of each drive mechanism on a normal operation state;
a first signal detection unit that detects a first signal indicating an operation state of each element of each drive mechanism within a predetermined period in a state where each drive mechanism individually activates;
a second determination unit that determines whether the drive mechanism has a fault or not based on the second signal detected by the second signal detection unit; and
a fault diagnosis unit that executes the fault diagnosis on each element in the drive mechanism determined that the drive mechanism has a fault by the second determination unit.
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Accused Products
Abstract
A fault diagnosis section activates a driving compornent alone, measures an operation state signal and a paper passage time, and stores feature values (Vm, σv, Tqs, σts) extracted as a determination reference in a storage medium. A paper passage fault determination section determines whether or not a fault has arisen on the basis of the paper passage time when an apparatus is under normal operating conditions. A diagnosis target block determination section determines an order to operate a detail fault diagnosis when it is determined that there is a plurality of diagnosis target blocks. When the driving compornent is activated alone under actual operation conditions, the operation state signal Vf is obtained, and an operation state fault determination section conducts diagnosis on whether or not a fault has arisen on the driving compornent and a state of the fault, and whether or not a fault has arisen on other power transmission compornents and a nature of the fault with reference to the feature values as the determination reference on the basis of a degree of deviation from a normal range.
19 Citations
6 Claims
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1. A fault diagnosis apparatus for diagnosing a fault that occurs in an apparatus having a plurality of drive mechanisms each including a driving component activated by current supply and a power transmission component that transmits a driving force of the driving component to another component which does not receive current supply, comprising:
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a second signal detection unit that detects a second signal indicating an operation state of each drive mechanism on a normal operation state;
a first signal detection unit that detects a first signal indicating an operation state of each element of each drive mechanism within a predetermined period in a state where each drive mechanism individually activates;
a second determination unit that determines whether the drive mechanism has a fault or not based on the second signal detected by the second signal detection unit; and
a fault diagnosis unit that executes the fault diagnosis on each element in the drive mechanism determined that the drive mechanism has a fault by the second determination unit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification