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US 10,870,273 B2Granted
Dies including strain gauge sensors and temperature sensors
AssigneeHewlett-Packard Development Company, L.P.
InventorsJames M Gardner, Berkeley Fisher, Daryl E Anderson
Life of this patent
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Abstract
A die includes a plurality of fluid actuation devices and at least one strain gauge sensor to sense strain. The die also includes at least one temperature sensor to sense the temperature of the die to compensate for a temperature component of the sensed strain.
Claims15
A die comprising:
- a plurality of fluid actuation devices;
- at least one strain gauge sensor to sense a strain within the die;
- and
- at least one temperature sensor to sense the temperature of the die to compensate for a temperature component of the sensed strain.
1 more element
A fluid ejection system comprising:
- a fluid ejection die comprising a plurality of actuation devices to eject fluid drops, a plurality of strain gauge sensors to sense a strain within the fluid ejection die, and a plurality of temperature sensors to sense temperature within the fluid ejection die;
- and
- a controller to receive the sensed strain from each strain gauge sensor and the sensed temperature from each temperature sensor and provide a temperature compensated strain for each sensed strain based on the sensed temperatures.
A method for maintaining a fluid ejection system, the method comprising:
- sensing a strain at a plurality of locations within a fluid ejection die via strain gauge sensors integrated within the fluid ejection die;
- sensing the temperature at the plurality of locations within the fluid ejection die via temperature sensors integrated within the fluid ejection die;
- and
- compensating the sensed strain from each strain gauge sensor based on the sensed temperatures.
1 more element
Dependencies are inferred from the claim text.