System and method for tuning and controlling an ultrasonic handpiece
First Claim
1. A method of tuning an ultrasonic device comprising a handpiece, comprising the steps of:
- a) generating a drive signal over a substantially continuous spectrum of frequencies from a low frequency below a predetermined drive frequency to a high frequency above the drive frequency;
b) exciting the handpiece with the drive signal;
c) measuring a response signal generated by the handpiece in response to the exciting step;
d) comparing the drive signal to the response signal in order to determine an admittance versus frequency relationship over the spectrum of frequencies;
e) determining at least one control parameter based on the shape of the response signal; and
f) generating a control signal containing information about the control parameter.
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Accused Products
Abstract
A system and method for tuning and controlling ultrasonic handpieces by incorporating a broad-spectrum signal as at least a component of the signal used to drive the handpiece. The response of the handpiece to this broad-spectrum signal is measured and the frequency or amplitude or both of the drive signal are adjusted in order to maintain the desired level of handpiece performance. The operation of the systems and the performance of the methods described enables the handpiece to be operated in a most effective manner over a more widely varying range of mechanical load and thermal conditions than was possible through the use of prior control systems and methods.
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Citations
19 Claims
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1. A method of tuning an ultrasonic device comprising a handpiece, comprising the steps of:
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a) generating a drive signal over a substantially continuous spectrum of frequencies from a low frequency below a predetermined drive frequency to a high frequency above the drive frequency; b) exciting the handpiece with the drive signal; c) measuring a response signal generated by the handpiece in response to the exciting step; d) comparing the drive signal to the response signal in order to determine an admittance versus frequency relationship over the spectrum of frequencies; e) determining at least one control parameter based on the shape of the response signal; and f) generating a control signal containing information about the control parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification