Balancing apparatus
AssigneeKokusai Keisokuki Kabushiki Kaisha
InventorHiroki Miura
Life of this patent
Estimating the term…
Abstract
Balancing apparatus that supports and rotates a body to be measured with a rotating mechanism so that the body vibrates due to the dynamic imbalance thereof. The vibration of the body is transmitted to a vibration member and then detected by a sensor. A vibrator is connected to the vibration member. The vibrator applies to the vibration member a vibration that is an inverse of a vibration that will be generated in the vibration member by an ideal body having an ideal dynamic imbalance. By detecting the vibration remaining in the vibration member, the balancing apparatus measures the deviation of the dynamic imbalance of the body from the ideal dynamic imbalance.
Claims18
A method for measuring dynamic imbalance of a body, comprising:
- rotating a test body having unknown dynamic imbalance to generate a first vibration in the test body;
- said first vibration being transmitted from the test body to a vibration member;
- applying a second vibration to the vibration member, the second vibration being adjusted to cancel vibration generated in the vibration member if the test body has ideal dynamic imbalance;
- detecting any vibration of the vibration member.
A method for calibrating balancing apparatus, the balancing apparatus applying vibration to a vibration member by rotating a test body, detecting the vibration of the vibration member, and carrying out a process for determining dynamic imbalance of the test body from the detected vibration, said method comprising:
- arranging a reference body such that vibration of the reference body transmits to the vibration member, said reference body having no dynamic imbalance;
- rotating the reference body;
- detecting vibration of the vibration member while applying reference vibration to the vibration member, the reference vibration being substantially identical to vibration generated in the vibration member by rotating the reference body provided with a weight at a predetermined location;
- and
- modifying a coefficient utilized in the process for determining the dynamic imbalance based on the vibration detected while applying reference vibration to the vibration member.
A method for testing balancing apparatus that determines dynamic balance of a test body by generating vibration in a vibration member by rotating the test body, and detecting the vibration of the vibration member by a sensor, the method comprising:
- arranging a reference body such that vibration of the reference body transmits to the vibration member, said reference body having no dynamic imbalance;
- rotating the reference body;
- detecting vibration of the vibration member while applying reference vibration to the vibration member, the reference vibration being substantially identical to vibration generated in the vibration member by rotating the reference body provided with a weight at a predetermined location;
- and
- determining whether the balancing apparatus has a defect that seriously reduces the vibration transmitted from the reference body to the sensor by comparing the vibration detected by the sensor with the reference vibration.
A balancing apparatus, comprising:
- a rotating mechanism for rotating a body to be measured;
- a vibration member for being vibrated by the body being rotated by said rotating mechanism;
- a sensor for detecting vibration of said vibration member;
- and
- a vibrator coupled to said vibration member for vibrating said vibration member,
- wherein said vibrator applies to said vibration member a vibration, which is an inverse of a vibration that will be caused to said vibration member by an ideal body having an ideal dynamic imbalance,
- wherein said vibrator vibrates said vibration member so as to cancel a predetermined vibration of said vibration member, and
- wherein, in use, said sensor detects composite vibration generated in said vibration member by said body and said vibrator.
A balancing apparatus, comprising:
- a rotating mechanism for rotating a body to be measured;
- a vibration member for being vibrated by the body being rotated by said rotating mechanism;
- a sensor for detecting vibration of said vibration member;
- a vibrator coupled to said vibration member for vibrating said vibration member;
- and
- a controller for determining whether said balancing apparatus has a defect that seriously reduces the vibration transmitted from the body to said sensor, based on vibration detected by said sensor while said vibrator is applying a reference vibration to said vibration member,
- wherein said vibrator vibrates said vibration member so as to cancel a predetermined vibration of said vibration member, and
- wherein, in use, said sensor detects composite vibration generated in said vibration member by said body and said vibrator.
A balancing apparatus, comprising:
- a rotating mechanism for rotating a body to be measured;
- a vibration member for being vibrated by the body being rotated by said rotating mechanism;
- a sensor for detecting vibration of said vibration member;
- a vibrator coupled to said vibration member for vibrating said vibration member;
- and
- a processor for carrying out calculation for determining dynamic imbalance of the body from output of said sensor,
- wherein said vibrator vibrates said vibration member so as to cancel a predetermined vibration of said vibration member,
- wherein, in use, said sensor detects composite vibration generated in said vibration member by said body and said vibrator, and
- wherein said processor performs modification of a coefficient utilized in said calculation, said modification being carried out based on output of said sensor while said rotating mechanism is rotating a dynamically balanced reference body as well as said vibrator is applying to said vibration member a reference vibration, said reference vibration being substantially identical to vibration that will be caused to said vibration member by rotating the reference body provided with a weight at a predetermined location.
A balancing apparatus, comprising:
- a rotating mechanism for rotating a body to be measured;
- a vibration member for being vibrated by the body being rotated by said rotating mechanism;
- a sensor for detecting vibration of said vibration member;
- a memory device for holding data of the vibration detected by said sensor;
- a vibrator coupled to said vibration member for applying vibration thereto;
- and
- a controller having first and second operation modes, said controller in said first operation mode storing data of the vibration detected by said sensor into said memory device while keeping said vibrator out of operation, said controller in said second operation mode vibrating said vibration member by controlling said vibrator based on said data held said memory device.
Dependencies are inferred from the claim text.