WO2019109334A1 - 高频电刀负极板接触质量的测量装置及方法 - Google Patents

高频电刀负极板接触质量的测量装置及方法 Download PDF

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WO2019109334A1
WO2019109334A1 PCT/CN2017/115223 CN2017115223W WO2019109334A1 WO 2019109334 A1 WO2019109334 A1 WO 2019109334A1 CN 2017115223 W CN2017115223 W CN 2017115223W WO 2019109334 A1 WO2019109334 A1 WO 2019109334A1
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impedance
measuring
negative electrode
electrode plate
circuit
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PCT/CN2017/115223
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English (en)
French (fr)
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黄文星
鲁文
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赛诺微医疗科技（浙江）有限公司
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Priority to PCT/CN2017/115223 priority Critical patent/WO2019109334A1/zh
Publication of WO2019109334A1 publication Critical patent/WO2019109334A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/16—Indifferent or passive electrodes for grounding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Definitions

  • the present disclosure relates to the field of electrosurgical equipment, and in particular to a measuring device and method for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device.
  • High-frequency electrosurgical knife (electric scalpel) is a commonly used device in surgery. As shown in Figure 2, it is a circuit structure of high-frequency electrosurgical knife.
  • 1 is a high-frequency electrosurgical unit, which converts AC mains into High-frequency high-voltage energy, its output forms a current loop with the electric knife, negative plate and human tissue
  • 2 is the surgical accessory electric knife pen, forming a current loop with the negative plate for cutting and coagulating the human tissue, and the switch on the same Control the output and shutdown of RF energy
  • 3 is the surgical accessory negative plate, also called neutral electrode, which is attached to the surface of human skin during actual use to provide a return path for RF energy. If the negative plate is poorly attached, it will cause skin burning and even burns.
  • the negative plate is an important part of the high-frequency electrosurgical knife.
  • the quality of contact with the human body has important significance. It is directly related to the safety of the operation. During the operation, the contact quality between the negative plate and the human body must be continuously and effectively detected. Ensure that the negative plate has good contact with the human body throughout the entire procedure.
  • FIG. 1 it is a test scheme for the contact quality of a conventional high-frequency electric knife negative plate.
  • the contact quality can be judged by the contact resistance of the negative electrode plate and the human body, and R1 and R2 are respectively two negative electrodes.
  • the equivalent resistance of the plate and the contacted human tissue, the impedance measuring chip is connected to both ends of the negative plate, and the external impedance (R1+R2) is excited by the signal generated by the internal frequency generator of the chip, and then the discrete Fourier is performed by the on-chip DSP.
  • the obtained sine wave signal is sent to the operational amplifier and the A/D conversion module for amplification and analog-to-digital conversion processing, and finally enters the system controller for system control of determination and response; the test scheme can be linearly and accurately measured
  • DFT Deform
  • the contact resistance of the total negative plate is not known, but the quality of the contact of the single negative plate cannot be judged. For example, if the contact of R1 is not good but the total impedance is within a reasonable range, this solution cannot be identified. How to solve the problem that the two-plate negative plate in the prior art cannot be accurately measured for asymmetric contact has become an urgent problem that designers need to solve.
  • An object of the present disclosure is to provide a measuring device and method for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device, in order to at least partially solve the above technical problems.
  • the present disclosure provides a measuring device for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device, which includes:
  • a first impedance measuring circuit for measuring an equivalent contact impedance between the first negative plate and the tested human body by an excitation method, and converting the measured first impedance signal into a first standard sine wave analog signal, inputting the first Op amp / AD module;
  • a first operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the first impedance measuring circuit, and inputting the processed first digital signal to the system controller;
  • a second impedance measuring circuit for measuring an equivalent contact impedance between the second negative plate and the tested human body by an excitation method, and converting the measured second impedance signal into a second standard sine wave analog signal, inputting the second Op amp / AD module;
  • a second operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the second impedance measuring circuit, and inputting the processed second digital signal to the system controller;
  • the system controller is configured to calculate the input first digital signal and the second digital signal, and analyze the contact quality of the negative electrode plate of the high-frequency electric knife device.
  • the present disclosure also provides a method for measuring a contact quality of a negative electrode plate of a high-frequency electrosurgical device, which is measured by a measuring device for a contact quality of a negative electrode plate of a high-frequency electrosurgical device as described above, It is characterized by the following steps:
  • the first/second impedance measuring circuit Measuring the equivalent contact impedance between the first/second negative plate and the tested human body by the first/second impedance measuring circuit, and converting the measured first/second impedance signals into the first/second standard a sine wave analog signal, respectively input to the first/second op amp/AD module to amplify and AD convert the input first/second standard sine wave analog signal, and then obtain the first/second digital signal thus obtained Enter the system controller separately;
  • the system controller compares the two based on the input first/second digital signals to determine whether there is a difference between the two values exceeding a preset threshold to determine whether there is impedance. Asymmetry.
  • the present disclosure can effectively realize the impedance detection function of the dual negative plate, and simultaneously solve the problem of unbalance detection of the double negative plate which cannot be solved by the prior art, and ensure that the high frequency electric knife device is safe and effective in use;
  • the double-channel negative plate paste unbalance detection problem of the present disclosure is effectively realized by separately detecting the impedance between the two negative electrode plates and the tissue, and comparing with a reasonable impedance range to determine whether each negative electrode plate is reliably adhered; the device of the present disclosure
  • the structure is simple, no expensive chip is needed, the detection sensitivity is high, and the anti-interference ability is strong.
  • Figure 1 is a block diagram showing the structure of a prior art measuring device
  • FIG. 2 is a schematic diagram of a current loop structure of a prior art high frequency electric knife
  • Figure 3 is a block diagram showing the structure of a measuring device of the present disclosure
  • FIG. 4 is a schematic structural view of a negative electrode plate with test leads of the present disclosure
  • FIG. 5 is a circuit diagram of an impedance measurement circuit of the measuring method of the present disclosure.
  • the present disclosure discloses a measuring device for the contact quality of a negative plate of a high-frequency electrosurgical device, comprising:
  • a first impedance measuring circuit for measuring an equivalent contact impedance between the first negative plate and the tested human body by an excitation method, and converting the measured first impedance signal into a first standard sine wave analog signal, inputting the first Op amp / AD module;
  • a first operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the first impedance measuring circuit, and inputting the processed first digital signal to the system controller;
  • a second impedance measuring circuit for measuring an equivalent contact impedance between the second negative plate and the tested human body by an excitation method, and converting the measured second impedance signal into a second standard sine wave analog signal, inputting the second Op amp / AD module;
  • a second operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the second impedance measuring circuit, and inputting the processed second digital signal to the system controller;
  • the system controller is configured to calculate the input first digital signal and the second digital signal, and analyze the contact quality of the negative plate of the high-frequency electric knife device.
  • the first/second impedance measuring circuit includes:
  • the two ends of the primary coil of the transformer are respectively connected to the two ends of the equivalent contact impedance between the first/second negative plate and the tested human body, and constitute a parallel resonant circuit with the first capacitor connected in parallel;
  • the stage coil is connected in series with the second capacitor, the first resistor and the excitation source of the LCR circuit to form an LCR series circuit;
  • the first/second impedance signal measured by the first/second impedance measuring circuit passes through the secondary output of the transformer.
  • the excitation source of the LCR circuit generates a pulse signal of 50-100 kHz.
  • the resonant frequency of the parallel resonant circuit formed by the primary of the transformer is preferably equal to the resonant frequency of the parallel resonant circuit of the secondary of the transformer to obtain a standard sinusoidal signal.
  • the third negative plate is disposed at a central position of the first negative plate and the second negative plate, and the third negative plate does not flow the main power current itself, but is used as the lead electrode in combination with the first negative plate and the second negative plate 2
  • the tissue impedance between the first negative plate and the third negative plate, and between the second negative plate and the third negative plate were respectively tested.
  • the system controller performs an addition calculation on the input first digital signal and the second digital signal, and performs size comparison.
  • the present disclosure also discloses a method for measuring the contact quality of a negative plate of a high-frequency electrosurgical device, which is measured by the measuring device for the contact quality of the negative plate of the high-frequency electrosurgical device as described above, comprising the following steps:
  • the first/second impedance measuring circuit Measuring the equivalent contact impedance between the first/second negative plate and the tested human body by the first/second impedance measuring circuit, and converting the measured first/second impedance signals into the first/second standard a sine wave analog signal, respectively input to the first/second op amp/AD module to amplify and AD convert the input first/second standard sine wave analog signal, and then obtain the first/second digital signal thus obtained Enter the system controller separately;
  • the system controller compares the two based on the input first/second digital signals to determine whether there is a difference between the two values exceeding a preset threshold to determine whether there is a phenomenon of impedance asymmetry.
  • the system controller also performs an arithmetic sum calculation based on the input first/second digital signals.
  • the system controller determines whether the negative plate is in poor contact with the human body based on whether the arithmetic and the result are between 10-150 ⁇ .
  • the preset threshold is 50 ⁇ .
  • 1 is a high-frequency electric knife main machine, which converts AC mains into high-frequency high-voltage energy, and its output forms a current loop with electric knife, negative plate and human tissue;
  • 2 is a surgical accessory electric pen, and negative plate Forming a current loop for cutting and coagulating human tissue, the switch on it is used to control the output and shutdown of the RF energy;
  • 3 is the surgical accessory negative plate, also called the neutral electrode, which is adhered to the surface of the human skin during actual use. Provides a return path for RF energy. If the negative plate is poorly attached, it will cause skin burning or even burns.
  • the negative plate is an important part of the high-frequency electric knife.
  • the quality of contact with the human body is of great significance and directly related to the safety of surgery. During the operation, the contact quality between the negative plate and the human body must be continuously and effectively detected to ensure good contact quality between the negative plate and the human body during the entire operation.
  • R1 and R2 are respectively equivalent contact resistance between two negative plates and a human body
  • impedance measuring circuit 1 and impedance measurement Circuit 2 measures the resistance of R1 and R2 respectively, converts the impedance signal into a standard sine wave analog signal, sends the operational amplifier and AD to perform amplification and AD conversion processing, and the processed digital signal is sent to the system controller (MCU) for calculation and corresponding System operation.
  • MCU system controller
  • the present disclosure detects the impedances of R1 and R2, respectively.
  • the total impedance of the negative plate and the human body is the arithmetic sum of R1 and R2.
  • the system can judge the overall contact quality of the negative plate and the human body according to the test result, such as the impedance range of 10-150 ⁇ , out of range. It can be determined that the negative electrode plate is in poor contact with the human body.
  • the total impedance is within a reasonable impedance range.
  • This invention detects the two impedances separately, and by comparing the test results, it is easy to identify the case where the negative plate is asymmetrically pasted.
  • PIN1 and PIN2 are respectively two negative electrode plate leads, which are also high frequency energy main circuits, and the impedance between PIN1 and PIN2 is negative plate 1 and negative plate 2
  • PIN3 is the lead wire of the negative plate 3
  • the negative plate 3 is located at the center of the negative plate 1 and the negative plate 2
  • the negative plate 3 itself does not flow the main power current, combined
  • the negative electrode plate 1 and the negative electrode plate 2 were used to test the tissue impedance between the negative electrode plate 1 and the negative electrode plate 3, and between the negative electrode plate 2 and the negative electrode plate 3, respectively.
  • FIG. 5 is the impedance measurement circuit diagram
  • R1 is the equivalent impedance of the negative plate
  • the parallel inductance circuit is composed of C1 and T1 primary inductance
  • V1 is the excitation source of the transformer secondary LCR circuit
  • C2 and R2 form the LCR series circuit, generally 50-100kHz.
  • the resonant frequency of the circuit is equal, ensuring that the primary voltage of the transformer T1 reaches a maximum value and is a standard sine wave, and at the same time improves the accuracy of the subsequent sampling circuit.
  • Different resistances correspond to different voltage values, that is, the voltage signal indicates the resistance of the resistor R1.
  • the resistance voltage signal is transmitted to the secondary sampling circuit through the transformer, and after the amplification and AD processing, the entire impedance detection process is completed.

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Abstract

一种高频电刀设备负极板（3）接触质量的测量装置及方法，该测量装置包括：第一和第二阻抗测量电路（1，2），用于通过激励方式测量第一和第二负极板与被测试人体之间的等效接触阻抗（R1，R2），并将测得的第一和第二阻抗信号转换成第一和第二标准正弦波模拟信号，输入第一和第二运放/AD模块；第一和第二运放/AD模块，用于将第一和第二阻抗测量电路（1，2）输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第一和第二数字信号输入***控制器（MCU）；***控制器（MCU），用于对输入的第一和第二数字信号进行计算，分析得出高频电刀设备负极板（3）的接触质量。

Description

高频电刀负极板接触质量的测量装置及方法 技术领域
本公开涉及电外科手术设备领域，具体涉及一种高频电刀设备负极板接触质量的测量装置及方法。
背景技术
外科手术中高频电刀(电手术刀)是一种常用的设备，如图2所示，为高频电刀的一种电路结构，其中1为高频电刀主机，将交流市电转变为高频高压能量，其输出与电刀笔、负极板和人体组织形成电流回路；2为手术附件电刀笔，与负极板形成电流回路，用于对人体组织进行切和凝操作，其上的开关用于控制射频能量的输出和关闭；3为手术附件负极板，也叫中性电极，实际使用时粘贴到人体皮肤表面，为射频能量提供回流路径，如果负极板粘贴不良，将造成皮肤灼热甚至烧伤，负极板是高频电刀的重要组成部分，其与人体的接触质量具有重要的意义，直接关系到手术安全，在手术过程中必须对负极板与人体的接触质量进行持续的有效的检测，确保在整个手术过程中，负极板与人体有良好的接触质量。
现有技术中，如图1所示，为常规的高频电刀负极板接触质量的一种测试方案，接触质量可通过负极板和人体的接触电阻大小判断，R1和R2分别为双片负极板和接触到的人体组织的等效电阻，阻抗测量芯片连接到负极板两端，利用芯片内部的频率发生器产生的信号激励外部阻抗(R1+R2)，然后由片上DSP进行离散傅里叶变换(DFT)处理，得到的正弦波信号送入运算放大器和A/D转换模块分别做放大和模数转换处理，最终进入***控制器做判定和响应的***控制；此测试方案可线性精确测量到总的负极板接触阻抗，但对单片负极板接触质量情况无法做出判断，如在R1接触不好但总阻抗在合理范围内的情况，此方案无法识别。如何解决现有技术中的双片负极板对于非对称接触时无法准确测量的问题，成了目前设计人员迫切需要解决的难题。
公开内容
本公开的目的在于提供一种高频电刀设备负极板接触质量的测量装置及方法，以期至少部分地解决上述技术问题。
为了实现上述目的，作为本公开的一个方面，本公开提供了一种高频电刀设备负极板接触质量的测量装置，其特征在于，包括：
第一阻抗测量电路，用于通过激励方式测量第一负极板与被测试人体之间的等效接触阻抗，并将测得的第一阻抗信号转换成第一标准正弦波模拟信号，输入第一运放/AD模块；
第一运放/AD模块，用于将第一阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第一数字信号输入***控制器；
第二阻抗测量电路，用于通过激励方式测量第二负极板与被测试人体之间的等效接触阻抗，并将测得的第二阻抗信号转换成第二标准正弦波模拟信号，输入第二运放/AD模块；
第二运放/AD模块，用于将第二阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第二数字信号输入***控制器；
***控制器，用于对输入的第一数字信号和第二数字信号进行计算，分析得出所述高频电刀设备负极板的接触质量。
作为本公开的另一个方面，本公开还提供了一种高频电刀设备负极板接触质量的测量方法，通过如上所述的高频电刀设备负极板接触质量的测量装置来进行测量，其特征在于，包括以下步骤：
通过第一/第二阻抗测量电路分别测量第一/第二负极板与被测试人体之间的等效接触阻抗，并将测得的第一/第二阻抗信号转换成第一/第二标准正弦波模拟信号，分别输入第一/第二运放/AD模块以将输入的第一/第二标准正弦波模拟信号进行放大和AD转换处理，再将由此得到的第一/第二数字信号分别输入***控制器；
***控制器基于输入的第一/第二数字信号对两者进行大小比较，以判断是否存在两者数值差异超出预先设定的阈值，来判断是否存在阻抗 不对称的现象。
基于上述技术方案可知，本公开能有效实现双路负极板阻抗检测功能，同时处理现有技术不能解决的双路负极板粘贴不平衡检测问题，确保高频电刀设备在使用过程中安全有效；本公开的双路负极板粘贴不平衡检测问题是通过分别检测两片负极板和组织之间的阻抗，与合理的阻抗范围比较从而判断每一片负极板是否粘贴可靠来有效实现；本公开的装置结构简单，不需要使用昂贵的芯片，检测灵敏度高，抗干扰能力强。
附图说明
图1是现有技术的测量装置的结构方框图；
图2是现有技术的高频电刀的电流回路结构示意图；
图3是本公开的测量装置的结构方框图；
图4是本公开的带测试引线的负极板的结构示意图；
图5是本公开的测量方法的阻抗测量电路图。
具体实施方式
本公开公开了一种高频电刀设备负极板接触质量的测量装置，包括：
第一阻抗测量电路，用于通过激励方式测量第一负极板与被测试人体之间的等效接触阻抗，并将测得的第一阻抗信号转换成第一标准正弦波模拟信号，输入第一运放/AD模块；
第一运放/AD模块，用于将第一阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第一数字信号输入***控制器；
第二阻抗测量电路，用于通过激励方式测量第二负极板与被测试人体之间的等效接触阻抗，并将测得的第二阻抗信号转换成第二标准正弦波模拟信号，输入第二运放/AD模块；
第二运放/AD模块，用于将第二阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第二数字信号输入***控制器；
***控制器，用于对输入的第一数字信号和第二数字信号进行计算，分析得出高频电刀设备负极板的接触质量。
其中，该第一/第二阻抗测量电路包括：
一变压器，该变压器的初级线圈的两端分别连接第一/第二负极板与被测试人体之间的等效接触阻抗的两端，并与并联的第一电容组成并联谐振电路；变压器的次级线圈与第二电容、第一电阻及LCR电路激励源串联，组成LCR串联电路；
第一/第二阻抗测量电路测得的第一/第二阻抗信号通过该变压器的次级输出。
其中，该LCR电路激励源产生50～100kHz的脉冲信号。
其中，变压器的初级形成的并联谐振电路的谐振频率优选与变压器的次级的并联谐振电路的谐振频率相等，以得到标准正弦波信号。
其中，第一负极板和第二负极板的中心位置设置有一第三负极板，该第三负极板本身不流通主功率电流，而是作为引出极结合第一负极板和第二负极板2用于分别测试第一负极板和第三负极板之间、第二负极板和第三负极板之间的组织阻抗。
其中，***控制器对输入的第一数字信号和第二数字信号进行加和计算，并进行大小比较。
本公开还公开了一种高频电刀设备负极板接触质量的测量方法，通过如上所述的高频电刀设备负极板接触质量的测量装置来进行测量，包括以下步骤：
通过第一/第二阻抗测量电路分别测量第一/第二负极板与被测试人体之间的等效接触阻抗，并将测得的第一/第二阻抗信号转换成第一/第二标准正弦波模拟信号，分别输入第一/第二运放/AD模块以将输入的第一/第二标准正弦波模拟信号进行放大和AD转换处理，再将由此得到的第一/第二数字信号分别输入***控制器；
***控制器基于输入的第一/第二数字信号对两者进行大小比较，以判断是否存在两者数值差异超出预先设定的阈值，来判断是否存在阻抗不对称的现象。
其中，***控制器还基于输入的第一/第二数字信号进行算术和计算。
其中，***控制器基于所述算术和结果是否在10-150Ω之间来判定负极板与人体接触是否质量不良。
其中，该预先设定的阈值为50Ω。
下面结合附图和具体实施方式对本公开的技术方案作进一步的详细说明。
如图2所示，1为高频电刀主机，将交流市电转变为高频高压能量，其输出与电刀笔、负极板和人体组织形成电流回路；2为手术附件电刀笔，与负极板形成电流回路，用于对人体组织进行切和凝操作，其上的开关用于控制射频能量的输出和关闭；3为手术附件负极板，也叫中性电极，实际使用时粘贴到人体皮肤表面为射频能量提供回流路径，如果负极板粘贴不良，将造成皮肤灼热甚至烧伤，负极板是高频电刀的重要组成部分，其与人体的接触质量具有重要的意义，直接关系到手术安全，在手术过程中必须对负极板与人体的接触质量进行持续的有效的检测，确保在整个手术过程中负极板与人体有良好的接触质量。
图3所示为本公开的具体方案，此发明适用于双片负极板的接触质量检测，R1和R2分别为两片负极板和人体之间的等效接触电阻，阻抗测量电路1和阻抗测量电路2分别测量R1和R2的电阻，将阻抗信号转变为标准正弦波模拟信号，送运放和AD做放大和AD转换处理，处理后的数字信号送***控制器(MCU)进行计算和相应的***操作。
本公开分别检测R1和R2的阻抗，负极板和人体接触总的阻抗为R1和R2的算术和，***可根据测试结果判断负极板与人体整体接触质量，如阻抗范围为10-150Ω，超出范围则可判定负极板与人体接触质量不良。
但如果其中一个在阻抗范围内，另一个超出阻抗范围，总的阻抗在合理阻抗范围内，传统的接触质量检测方案则无法判断实际的负极板的粘贴情况，如R1＝5Ω，R2＝100Ω，总的阻抗为105Ω，在合理的阻抗范围内，但实际上，两片负极板粘贴不对称，其中一片很有可能粘贴不 良，常规的测试方法无法检测到此种情况，此发明因对两个阻抗分别检测，通过对比测试结果，很容易识别负极板非对称粘贴的情况。
图4为本公开所用负极板的线路图，如图所示，PIN1和PIN2分别为两片负极板引线，也是高频能量主回路，PIN1和PIN2之间的阻抗为负极板1和负极板2之间的阻抗，包括负极板本身阻抗和所粘贴位置组织阻抗，PIN3为负极板3引出线，负极板3位于负极板1和负极板2中心位置，负极板3本身不流通主功率电流，结合负极板1和负极板2用于分别测试负极板1和负极板3之间、负极板2和负极板3之间的组织阻抗。
图5为阻抗测量电路图，R1为负极板等效阻抗，与C1和T1初级电感组成并联谐振电路，V1为变压器次级LCR电路激励源，与C2、R2组成LCR串联电路，一般为50～100kHz的脉冲信号，并联电路R1、C1，T1的谐振频率为
Figure PCTCN2017115223-appb-000001
L1为变压器T1的初级电感，C1为谐振电容，R1为两片负极板间的等效组织阻抗，如C1＝0.32μF，L1＝10μH，其谐振频率为89kHz；激励源的脉冲频率与并联谐振电路的谐振频率相等，确保变压器T1初级的电压达到最大值且为标准的正弦波，同时提高后级采样电路的准确性，不同的电阻对应不同的电压值，即电压信号指示电阻R1的阻值，通过变压器将电阻电压信号传递到次级采样电路，在经过放大和AD处理后，即完成整个阻抗检测过程。
以上所述的具体实施例，对本公开的目的、技术方案和有益效果进行了进一步详细说明，应理解的是，以上所述仅为本公开的具体实施例而已，并不用于限制本公开，凡在本公开的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (10)

  1. 一种高频电刀设备负极板接触质量的测量装置，其特征在于，包括：
    第一阻抗测量电路，用于通过激励方式测量第一负极板与被测试人体之间的等效接触阻抗，并将测得的第一阻抗信号转换成第一标准正弦波模拟信号，输入第一运放/AD模块；
    第一运放/AD模块，用于将第一阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第一数字信号输入***控制器；
    第二阻抗测量电路，用于通过激励方式测量第二负极板与被测试人体之间的等效接触阻抗，并将测得的第二阻抗信号转换成第二标准正弦波模拟信号，输入第二运放/AD模块；
    第二运放/AD模块，用于将第二阻抗测量电路输入的标准正弦波模拟信号进行放大和AD转换处理，并将处理后的第二数字信号输入***控制器；
    ***控制器，用于对输入的第一数字信号和第二数字信号进行计算，分析得出所述高频电刀设备负极板的接触质量。
  2. 根据权利要求1所述的测量装置，其特征在于，所述第一/第二阻抗测量电路包括：
    一变压器，所述变压器的初级线圈的两端分别连接第一/第二负极板与被测试人体之间的等效接触阻抗的两端，并与并联的第一电容组成并联谐振电路；所述变压器的次级线圈与第二电容、第一电阻及LCR电路激励源串联，组成LCR串联电路；
    所述第一/第二阻抗测量电路测得的第一/第二阻抗信号通过所述变压器的次级输出。
  3. 根据权利要求2所述的测量装置，其特征在于，所述LCR电路激励源产生50～100kHz的脉冲信号。
  4. 根据权利要求2所述的测量装置，其特征在于，所述变压器的初级形成的并联谐振电路的谐振频率与所述变压器的次级的并联谐振 电路的谐振频率相等。
  5. 根据权利要求1所述的测量装置，其特征在于，所述第一负极板和第二负极板的中心位置设置有一第三负极板，所述第三负极板本身不流通主功率电流，而是作为引出极结合第一负极板和第二负极板2用于分别测试第一负极板和第三负极板之间、第二负极板和第三负极板之间的组织阻抗。
  6. 根据权利要求1所述的测量装置，其特征在于，所述***控制器对输入的第一数字信号和第二数字信号进行加和计算，并进行大小比较。
  7. 一种高频电刀设备负极板接触质量的测量方法，通过如权利要求1至6任意一项所述的高频电刀设备负极板接触质量的测量装置来进行测量，其特征在于，包括以下步骤：
    通过第一/第二阻抗测量电路分别测量第一/第二负极板与被测试人体之间的等效接触阻抗，并将测得的第一/第二阻抗信号转换成第一/第二标准正弦波模拟信号，分别输入第一/第二运放/AD模块以将输入的第一/第二标准正弦波模拟信号进行放大和AD转换处理，再将由此得到的第一/第二数字信号分别输入***控制器；
    ***控制器基于输入的第一/第二数字信号对两者进行大小比较，以判断是否存在两者数值差异超出预先设定的阈值，来判断是否存在阻抗不对称的现象。
  8. 根据权利要求7所述的测量方法，其特征在于，所述***控制器还基于输入的第一/第二数字信号进行算术和计算。
  9. 根据权利要求8所述的测量方法，其特征在于，所述***控制器基于所述算术和结果是否在10-150Ω之间来判定负极板与人体接触是否质量不良。
  10. 根据权利要求7所述的测量方法，其特征在于，所述预先设定的阈值为50Ω。
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