SURGICAL INSTRUMENT WITH ACOUSTIC-BASED MOTOR CONTROL
A surgical instrument is disclosed. The surgical instrument includes a drive system and a control circuit. The drive system includes an electric motor. The control circuit includes an acoustic sensor, and is configured to utilize a parameter of the drive system measured by the acoustic sensor to control a speed of the electric motor.
1 . A surgical instrument, comprising:
a drive system comprising an electric motor; and
a control circuit comprising an acoustic sensor, wherein the control circuit is configured to utilize a parameter of the drive system measured by the acoustic sensor to control a speed of the electric motor.
2 . The surgical instrument of claim 1 , wherein the drive system further comprises a gear box and a drive train.
3 . The surgical instrument of claim 1 , wherein the control circuit further comprises at least one of the following:
a fast Fourier transform circuit; and
a fast Fourier transform algorithm executable by a processor of the control circuit.
4 . The surgical instrument of claim 1 , wherein the control circuit is further configured to determine a degradation of the drive system.
5 . The surgical instrument of claim 4 , wherein the control circuit is further configured to adjust a motor control algorithm in response to the determined degradation of the drive system.
6 . The surgical instrument of claim 5 , wherein the motor control algorithm, when executed by the surgical instrument, is configured to adjust at least one of the following:
the speed of the electric motor;
a motor speed command signal provided by a motor controller of the surgical instrument;
a voltage applied to the electric motor;
a pulse width modulation duty cycle; and
a current limit of a motor controller of the surgical instrument.
7 . The surgical instrument of claim 1 , wherein the control circuit is further configured to provide an indication of an impending failure of the surgical instrument.
8 . A surgical instrument, comprising:
a drive system comprising an electric motor; and
a control circuit comprising an acoustic sensor, wherein the control circuit is configured to utilize a parameter of the drive system measured by the acoustic sensor to control a torque applied by the electric motor.
9 . The surgical instrument of claim 8 , wherein the drive system further comprises a gear box and a drive train.
10 . The surgical instrument of claim 8 , wherein the control circuit further comprises a fast Fourier transform circuit.
11 . The surgical instrument of claim 8 , wherein the control circuit is further configured to determine a degradation of the drive system.
12 . The surgical instrument of claim 11 , wherein the control circuit is further configured to adjust a motor control algorithm in response to the determined degradation of the drive system.
13 . The surgical instrument of claim 12 , wherein the motor control algorithm, when executed by the surgical instrument, is configured to adjust at least one of the following:
the speed of the electric motor;
a motor speed command signal provided by a motor controller of the surgical instrument;
a voltage applied to the electric motor;
a pulse width modulation duty cycle; and
a current limit of a motor controller of the surgical instrument.
14 . The surgical instrument of claim 8 , wherein the control circuit is further configured to provide an indication of an impending failure of the surgical instrument.
15 . A surgical system, comprising:
a surgical instrument, comprising:
a drive system comprising an electric motor; and
a control circuit, comprising a sensing device, wherein the control circuit is configured to utilize a parameter of the drive system sensed by the sensing device to control a speed of the electric motor; and
a surgical hub system in communication with the surgical instrument, wherein the surgical hub system is configured to supply a second parameter to the control circuit, wherein the control circuit is further configured to utilize the second parameter to modify an operation of the surgical instrument.
16 . The surgical system of claim 15 , wherein the sensing device comprises at least one of the following:
an acoustic sensor;
a vibration sensor; and
an accelerometer.
17 . The surgical system of claim 15 , wherein the control circuit further comprises a fast Fourier transform circuit.
18 . The surgical system of claim 15 , wherein the second parameter comprises the presence of a previous stapling line in the tissue of the patient.
19 . The surgical system of claim 15 , wherein the second parameter comprises the presence of a gastric band in the tissue of the patient.
20 . The surgical system of claim 15 , wherein the second parameter comprises the presence of scarred tissue from a previous surgical procedure.
21 . The surgical system of claim 15 , wherein the surgical hub system is further configured to predict a failure of the surgical instrument.
22 . The surgical system of claim 15 , wherein the surgical hub system is further configured to provide a notification of a predicted failure of the surgical instrument.
23 . The surgical system of claim 15 , wherein the surgical hub system is further configured to communicate a predicted failure of the surgical instrument to the surgical instrument.