Method for testing piezoelectric sound transducer
AssigneeBecton, Dickinson and Company
InventorsSteve Beguin, Maurice Curtin, Simon O'Reilly
Life of this patent
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Abstract
A method for testing a drug delivery device including a piezoelectric transducer, a microcontroller, and a DC power source, with the piezoelectric transducer having an operative state and inoperative state. The method includes providing a drive signal to the piezoelectric transducer of the drug delivery device, determining an actuation voltage value or an actuation current value, and comparing the actuation voltage value or the actuation current value to a baseline value to determine whether the piezoelectric transducer is in the operative state or the inoperative state.
Claims25
A method for testing a drug delivery device comprising a piezoelectric transducer, a microcontroller, and a DC power source, the piezoelectric transducer having an operative state and inoperative state, the method comprising:
- providing, by the microcontroller, a drive signal from the DC power source to the piezoelectric transducer of the drug delivery device;
- determining, via sensing circuitry, an actuation voltage value or an actuation current value in response to the drive signal;
- comparing, by the microcontroller, the actuation voltage value or the actuation current value to a predetermined baseline value stored in memory that corresponds to operational characteristics of the transducer in the operative state;
- generating, by the microcontroller, a pass/fail result based on the comparison, indicating whether the piezoelectric transducer is in the operative state or the inoperative state;
- storing or outputting the pass/fail result for device readiness verification;
- and
- disabling a function of the drug delivery device if the pass/fail result indicates that the piezoelectric transducer is in the inoperative state.
A computer-implemented method for testing a drug delivery device comprising a piezoelectric transducer, a microcontroller, and a DC power source, the piezoelectric transducer having an operative state and inoperative state, the method comprising:
- providing, by at least one processor, a drive signal from the DC power source to the piezoelectric transducer of the drug delivery device;
- determining, by the at least one processor, an actuation voltage value in response to the drive signal;
- comparing, by the at least one processor, the actuation voltage value to a predetermined baseline voltage value stored in memory that corresponds to operational characteristics of the transducer when in the operative state;
- generating, by the at least one processor, a pass/fail result based on the comparison, indicating whether the piezoelectric transducer is in the operative state or the inoperative state;
- storing or outputting the pass/fail result for device readiness verification;
- and
- disabling a function of the drug delivery device if the pass/fail result indicates that the piezoelectric transducer is in the inoperative state.
A drug delivery device comprising:
- a DC power source;
- a cannula;
- a reservoir configured to receive a fluid;
- a pump configured to deliver a fluid from the reservoir to the cannula;
- a piezoelectric transducer having an operative state where the piezoelectric transducer produces an audible sound and an inoperative state where the piezoelectric transducer does not produce an audible sound;
- and
- a microcontroller comprising at least one processor programmed or configured to:
- provide a drive signal to the piezoelectric transducer;
- determine an actuation voltage value or an actuation current value in response to the drive signal;
- compare, by the at least one processor, the actuation voltage value or the actuation current value to a baseline value stored in memory that corresponds to operational characteristics of the piezoelectric transducer in the operative state;
- generate, by the at least one processor, a pass/fail result based on the comparison indicating whether the piezoelectric transducer is in the operative state or the inoperative state;
- store or output the pass/fail result for device readiness verification.
A computer program product for testing a drug delivery device comprising a piezoelectric transducer, a microcontroller, and a DC power source, the piezoelectric transducer having an operative state and inoperative state, the computer program product comprising at least one non-transitory computer-readable medium including program instructions that, when executed by the microcontroller, cause the microcontroller to:
- provide a drive signal from the DC power source to the piezoelectric transducer;
- determine an actuation voltage value or an actuation current value in response to the drive signal;
- compare the actuation voltage value or the actuation current value to a predetermined baseline value stored in memory that corresponds to operational characteristics of the transducer when in the operative state;
- generate a pass/fail result based on the comparison indicating whether the piezoelectric transducer is in the operative state or the inoperative state;
- store or output the pass/fail result for device readiness verification;
- and
- disabling a function of the drug delivery device if the pass/fail result indicates that the piezoelectric transducer is in the inoperative state.
Dependencies are inferred from the claim text.