公开(公告)号：WO1995018383A1

公开(公告)日：1995-07-06

申请号：PCT/IB1994000341

申请日：1994-11-03

Applicant: VALLEYLAB, INC.

Inventor： VALLEYLAB, INC. ,  MATSUNAGA, Derek

IPC: G01R21/133

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B2017/00026 ,  A61B2018/00666 ,  A61B2018/00678 ,  A61B2018/00684 ,  A61B2018/00702 ,  A61B2018/00708 ,  A61B2018/00755 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/1273 ,  G01R21/133

Abstract: A monitoring circuit (10) for an electrosurgical generator (11) has active and return output conductors. Voltage, current (24) and the inverse of current (24) picked up inductively are provided to adder circuits for summing the picked up voltage (20) and current (24) and computing the difference of the picked up voltage (20) and the current (24). Root mean square to direct current converters (26 and 28) signal RMS average values of the sum and difference. A microprocessor squares the values and applies them to a formula wherein the sum signals (22) have subtracted therefrom the difference signals (25); the results are divided by four to provide the root mean square of the power applied to the load (12). During desiccation the output is regulated in response to impedance to shut off output. A diagnostic circuit relates impedance load and output response during operation to a look up table or a microprocessor algorithm to calibrate. Feedback modifies the output when the adders determine the power applied to the load (12) in real time. A method has generator output to active and return conductors (14 and 15) and to inductive pick ups (16 and 17) for voltage and current (24), computes sum and differential values (25), changes root mean square to direct currents (24), squares the values and subtracts the differential from the summation, then divides the result finding the root mean square value of the power.

Abstract translation: 用于电外科发生器（11）的监测电路（10）具有有源和返回输出导体。 电压，电流（24）和电感（24）的反相电感被提供给加法电路，用于对拾取电压（20）和电流（24）求和，并计算拾取电压（20）和 当前（24）。 直流电平转换器（26和28）的均方根信号RMS和平均值和差值。 微处理器对数值进行平方并将其应用于其中和信号（22）从其中减去差分信号（25）的公式。 将结果除以四，以提供施加到负载（12）的功率的均方根。 在干燥期间，输出响应阻抗而被调节以切断输出。 诊断电路将操作期间的阻抗负载和输出响应与校准表或微处理器算法相关联。 当加法器实时确定施加到负载（12）的功率时，反馈修改输出。 一种方法具有用于电压和电流（24）的有源和返回导体（14和15）和感应拾取器（16和17）的发生器输出，计算和和微分值（25），将均方根与直流电流 24），对数值进行平方并从求和中减去微分，然后将结果找出幂的均方根值。

公开(公告)号：EP0737316A1

公开(公告)日：1996-10-16

申请号：EP94929618.0

申请日：1994-11-03

Applicant: VALLEYLAB, INC.

Inventor： MATSUNAGA, Derek

IPC: G01R21 ,  A61B18 ,  A61B17

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B2017/00026 ,  A61B2018/00666 ,  A61B2018/00678 ,  A61B2018/00684 ,  A61B2018/00702 ,  A61B2018/00708 ,  A61B2018/00755 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/1273 ,  G01R21/133

Abstract: A monitoring circuit (10) for an electrosurgical generator (11) has active and return output conductors. Voltage, current (24) and the inverse of current (24) picked up inductively are provided to adder circuits for summing the picked up voltage (20) and current (24) and computing the difference of the picked up voltage (20) and the current (24). Root mean square to direct current converters (26 and 28) signal RMS average values of the sum and difference. A microprocessor squares the values and applies them to a formula wherein the sum signals (22) have subtracted therefrom the difference signals (25); the results are divided by four to provide the root mean square of the power applied to the load (12). During desiccation the output is regulated in response to impedance to shut off output. A diagnostic circuit relates impedance load and output response during operation to a look up table or a microprocessor algorithm to calibrate. Feedback modifies the output when the adders determine the power applied to the load (12) in real time. A method has generator output to active and return conductors (14 and 15) and to inductive pick ups (16 and 17) for voltage and current (24), computes sum and differential values (25), changes root mean square to direct currents (24), squares the values and subtracts the differential from the summation, then divides the result finding the root mean square value of the power.