Back to results
US 7,243,544 B2Granted
Passive and wireless acoustic wave accelerometer
AssigneeHoneywell International Inc.
InventorsJames Z T Liu, Aziz Rahman
Life of this patent
Estimating the term…
Abstract
An acoustic wave acceleration sensor comprises an acoustic wave device including a plate that functions as a propagation medium and at least one interdigital transducer configured upon the plate. One or more antennas can be integrated with the acoustic wave device, wherein the antenna(s) communicates with interdigital transducers. Such antennas can receive wireless interrogation signals and transmit signals indicative of acceleration data.
Claims19
An acceleration sensor, comprising:
- an acoustic wave device including a plate that functions as a propagation medium and at least one Interdigital transducer configured upon said plate;
- and
- an antenna integrated with said acoustic wave device, wherein said antenna communicates with said at least one interdigital transducer such that said antenna receives and transmits signals indicative of acceleration data, wherein said acoustic wave device is clamped at one end of said plate to an object under an acceleration wherein said plate is positioned such that said plate is perpendicular to said acceleration and submitted to a force at said free end of said plate;
- and
- an inertial mass fixed to said plate such that when said acceleration is applied to said acoustic wave device perpendicularly to said plate, said acceleration is converted to a proportional force through utilization of said inertial mass, thereby generating signals indicative of said acceleration data for wireless transmission from said antenna.
2 more elements
An acceleration sensor, comprising:
- an acoustic wave device including a plate that functions as a propagation medium and at least one interdigital transducer configured upon said plate;
- an antenna integrated with said acoustic wave device, wherein said antenna communicates with said at least one interdigital transducer such that said antenna receives and transmits signals indicative of acceleration data, wherein said acoustic wave device is clamped at one end of said plate to an object under an acceleration wherein said acceleration is in a direction perpendicular to said plate and submitted to a force at said free end of said plate;
- and
- an etched rectangular frame-shaped channel located on a back side of said at least one interdigital transducer, such that a mass within said etched rectangular frame-shaped channel possesses a high sensitivity to said acceleration when said acceleration is applied to said acoustic wave device;
- and
- wherein said acceleration is converted to a proportional force, thereby generating signals indicative of said acceleration data for wireless transmission from said antenna.
3 more elements
An acceleration sensor, comprising:
- an acoustic wave device including a plate that functions as a propagation medium and at least one Interdigital transducer configured upon said plate;
- and
- an antenna integrated with said acoustic wave device, wherein said antenna communicates with said at least one interdigital transducer such that said antenna receives and transmits signals indicative of acceleration data, wherein said acoustic wave device is clamped at one end of said plate to an object under an acceleration wherein said acceleration is in a direction perpendicular to said plate and submitted to a force at said free end of said plate;
- and
- a coating with a heavy mass such that said acoustic wave sensor possesses a high sensitivity to said acceleration when said acceleration is applied to said acoustic wave device, such that said acceleration is converted to a proportional force, thereby generating signals indicative of said acceleration data for wireless transmission from said antenna.
2 more elements
Dependencies are inferred from the claim text.