CN109856496A - A kind of neutral electrode monitoring device - Google Patents
A kind of neutral electrode monitoring device Download PDFInfo
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- CN109856496A CN109856496A CN201910136015.3A CN201910136015A CN109856496A CN 109856496 A CN109856496 A CN 109856496A CN 201910136015 A CN201910136015 A CN 201910136015A CN 109856496 A CN109856496 A CN 109856496A
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Abstract
The present invention discloses a kind of neutral electrode monitoring device.Monitoring device includes: first coil, the second coil, tertiary coil, first capacitor and the second capacitor.First coil, the second coil and tertiary coil intercouple；The inductance of first coil and the second coil is equal；The first end of first coil and the first end of the second coil Same Name of Ends each other.The second output terminal of high-frequency energy generator is connect with the second end of the first end of first coil and the second coil respectively.High-frequency energy generator is in output state, and when neutral electrode contact is good, without high frequency electrical signal on tertiary coil.Conversely, can monitor high frequency electrical signal on tertiary coil when electrical breaks occur in neutral electrode connecting cable or its connector or when neutral electrode is bad with patient contact.Monitoring device provided by the invention is without separately setting power supply, exciting signal source and isolation circuit, and apparatus structure is simple, and implementation cost is low.
Description
Technical field
The present invention relates to high-frequency treatment apparatus fields, more particularly to a kind of neutral electrode monitoring device.
Background technique
In therapeutic treatment field, high-frequency treatment equipment uses a part of neutral electrode as radio frequency current circuit.Make
When treatment with high-frequency treatment equipment to patient, neutral electrode is pasted or sticks on patient body-surface, if do not connected
Neutral electrode or neutral electrode connect poor contact, can during being melted using high-frequency treatment equipment to patient's lesion
The injury to patient and/or operator (doctor) can be will cause.Therefore, very necessary to the monitoring of neutral electrode.
And existing neutral electrode monitoring device, it is necessary to which the power supply and pumping signal for being not higher than 12V are provided to observation circuit
Source will appear two kinds of entirely different electric currents on neutral electrode, and one is high frequency forceful electric power desired, required when treatment
Stream, another kind are faint exciting currents needed for monitoring neutral electrode；And above-mentioned power supply and pumping signal must and power grid
Power supply and be isolated, need to add corresponding isolation circuit.As it can be seen that the structure of existing neutral electrode observation circuit is cumbersome multiple
It is miscellaneous.
Summary of the invention
The object of the present invention is to provide a kind of neutral electrode monitoring devices, and apparatus structure is simple, and implementation cost is low.
To achieve the above object, the present invention provides following schemes:
A kind of neutral electrode monitoring device, the monitoring device include: first coil, the second coil, tertiary coil, first
Capacitor and the second capacitor, wherein
The first coil, second coil and the tertiary coil intercouple；The first coil and described
The inductance of two coil is equal；The first end of the first coil and the first end of second coil Same Name of Ends each other；
First output end of high-frequency energy generator respectively with the first end of the first capacitor and second capacitor
First end connection, the second end of the first capacitor are connect with one end of neutral electrode connector, and the second of second capacitor
End is connect with the other end of the neutral electrode connector；
The second output terminal of high-frequency energy generator respectively with the first end of the first coil and second coil
Second end connection, the second end of the first coil are connect with the second end of the first capacitor, and the first of second coil
End is connect with the second end of second capacitor.
Optionally, the monitoring device further includes rectification circuit, and the tertiary coil is connect with the rectification circuit.
Optionally, the rectification circuit is bridge rectifier.
Optionally, the monitoring device further includes filter circuit, the input terminal of the filter circuit and the rectification circuit
Output end connection.
Optionally, the monitoring device further includes indicator light, and the indicator light is connect with the output end of the filter circuit.
Optionally, the monitoring device further includes buzzer, and the buzzer is connect with the output end of the filter circuit.
Optionally, the first coil, second coil and the tertiary coil are wound on a magnetic core.
Optionally, the magnetic core is toroidal core.
Optionally, the first capacitor and the capacitance of second capacitor are unequal.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
A kind of neutral electrode monitoring device provided by the invention includes: first coil, the second coil, tertiary coil, first
Capacitor and the second capacitor.First coil, the second coil and tertiary coil intercouple.The inductance of first coil and the second coil
It is equal.The first end of first coil and the first end of the second coil Same Name of Ends each other.The second output terminal of high-frequency energy generator
It is connect respectively with the second end of the first end of first coil and the second coil, due to the first end and second coil of first coil
Second end different name end each other, and the inductance of first coil and the second coil is equal, high-frequency energy generator is in output state,
And neutral electrode contact it is good when, at any time, flow through the electric current i of first coilL1With the electric current i for flowing through the second coilL2's
Equal in magnitude and contrary, the magnetic flux after first coil and the second coil intercouple is zero, what tertiary coil was coupled to
High-frequency signal is zero, therefore, without high frequency electrical signal on tertiary coil.Conversely, if high-frequency energy generator is in output state, but
Neutral electrode does not connect or poor contact, and the high-frequency current of high-frequency energy generator output flows through the electric current i of first coilL1With
The electric current i of second coilL2Size it is unequal and contrary, first coil and the second coil intercouple after magnetic flux not
It is zero, tertiary coil can be coupled to high-frequency signal, can monitor high frequency electrical signal on tertiary coil.As it can be seen that the present invention mentions
The neutral electrode monitoring device of confession only passes through two capacitors and neutral electrode monitoring can be completed in three coils, is a kind of passive
Passive type monitoring device, without separately setting power supply, exciting signal source and isolation circuit, apparatus structure is simple, and implementation cost is low.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of circuit diagram of neutral electrode monitoring device provided in an embodiment of the present invention；
Fig. 2 is a kind of current direction signal of neutral electrode monitoring device provided in an embodiment of the present invention at a time
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of neutral electrode monitoring devices, and apparatus structure is simple, and implementation cost is low.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is a kind of circuit diagram of neutral electrode monitoring device provided in an embodiment of the present invention.As shown in Figure 1, in one kind
Property electrode monitoring device, comprising: first coil L1, the second coil L2, tertiary coil L3, first capacitor C1 and the second capacitor C2.
The first coil L1, the second coil L2 and the tertiary coil L3 intercouple；The first coil L1
It is equal with the inductance of the second coil L2；First end (end A), the first end of second coil of the first coil L1
The first end (1 end) of (end a) and the tertiary coil L3 Same Name of Ends each other.It is the second end (end K) of the first coil L1, described
The second end (end k) of second coil and the second end (2 end) of the tertiary coil L3 Same Name of Ends each other.
First end output end HF of high-frequency energy generator respectively with the first end of the first capacitor C1 and described second
The first end of capacitor C2 connects, and the second end of the first capacitor C1 is connect with one end (S-NE1) of neutral electrode connector, institute
The second end for stating the second capacitor is connect with the other end (S-NE2) of the neutral electrode connector.
The end second output terminal NE of high-frequency energy generator respectively with the first end of the first coil L1 and described second
The second end of coil L2 connects, and the second end of the first coil L1 is connect with the second end of the first capacitor C1, and described the
The first end of two coil L2 is connect with the second end of the second capacitor C2.
As a preferred embodiment, the monitoring device further includes rectification circuit, the tertiary coil L3 and the rectification
The ac input end of circuit connects.In the present embodiment, the rectification circuit is bridge-type hf rectifier.
Further, the monitoring device further includes filter circuit, the input terminal of the filter circuit and the rectified current
The DC output end on road connects.
In the present embodiment, rectifying and wave-filtering, the direct current of the DC output end of D are carried out using full bridge high frequency rectifier filter D
Signal is DC-OUT.
In order to intuitively show the connection status of neutral electrode, the also settable indicator light of the monitoring device, the indicator light
It is connect with the output end of the filter circuit.
When further, in order to make neutral electrode connecting cable or its connector electrical breaks occur or neutral electrode with
When patient contact is bad, alarm signal can be issued, the monitoring device in the present embodiment further includes buzzer, the buzzer and institute
State the output end connection of filter circuit.
In the present embodiment, the first coil L1, the second coil L2 and the tertiary coil L3 are wound on a magnetic
On core.The magnetic core is chosen as toroidal core.
The first capacitor C1 and the second capacitor C2 is high voltage bearing high frequency capacitor, the capacitance of the two not phase
Deng.The impedance value of first capacitor device C1 and the second capacitor C2 under the rated output frequency of high-frequency energy generator is the volume of equipment
50~200 times of fixed load.
Fig. 2 is a kind of current direction signal of neutral electrode monitoring device provided in an embodiment of the present invention at a time
Figure.From Figure 2 it can be seen that iL1The end A is flowed to by the end K of first coil L1, and iL2The end k is flowed to by the end a of the second coil L2, due to
The end A of one coil L1 and the end a of the second coil L2 are Same Name of Ends, so iL1And iL2Current direction it is completely opposite.Fig. 2 is only retouched
The instantaneous flow direction of high-frequency current at a time, in fact at any time, electric current i are drawnL1And iL2Direction be all complete
Opposite.
Specifically, when high-frequency energy generator is in output state, the second of the first coil L1 of inductor and inductor
The high-frequency current that coil L2 flows through is respectively iL1And iL2, total high-frequency current IO=∣ iL1∣+∣iL2∣.At any time, electric current iL1
And iL2Direction it is always completely opposite.Dang ∣ iL1∣=∣ iL2When ∣, the net current via inductor is zero, in the magnetic core of inductor
Magnetic flux be zero, the high-frequency signal that tertiary coil L3 is coupled to is zero, is obtained between two DC output ends of rectifier filter D
The direct current signal DC-OUT obtained is zero；Dang ∣ iL1∣≠∣iL2When ∣, there is net current to flow through inductor, tertiary coil L3 can be coupled
To high-frequency signal, after rectified filter D rectifying and wave-filtering, the direct current signal being not zero is obtained between two DC output ends of D
DC-OUT。
Below with reference to Fig. 1 and Fig. 2, the course of work under different situations is specifically described:
1, when neutral electrode connector, connecting cable and neutral electrode and good patient contact, due to first capacitor
The impedance value of C1 and the second capacitor C2 under the rated output frequency of high-frequency energy generator be equipment nominal load 50~
200 times, the high-frequency current very little of first capacitor C1 and the second capacitor C2 are then flowed through, the shunt volume of load current can be ignored
Disregard.
High-frequency current i since the inductance of first coil L1 and the second coil L2 are equal, on first coil L1L1With second
High-frequency current i on coil L2L2, the absolute value of the two is almost equal, but direction is completely on the contrary, first coil L1 and the second line
The magnetic flux that circle L2 is generated almost is offset, and the magnetic flux in magnetic core is zero, and the high-frequency signal that tertiary coil L3 is coupled to is
Zero, after rectified filter D rectifying and wave-filtering, the direct current signal DC-OUT between two DC output ends of D is zero.
2, when the connecting cable on neutral electrode connector S-NE1 interrupts, iL1≈ 0, iL2≈IO, high-frequency energy generator
The high-frequency current I of generationOAlmost all flows through the second coil L2, and tertiary coil L3 is coupled to be believed with the consistent high frequency of rated frequency
Number, after rectified filter D rectifying and wave-filtering, the direct current signal DC-OUT being not zero is obtained between two DC output ends of D.
3, when the connecting cable on neutral electrode connector S-NE2 interrupts, iL2≈ 0, iL1≈IO, high-frequency current IOAlmost
First coil L1 is flowed completely through, tertiary coil L3 is coupled to and the consistent high-frequency signal of rated frequency, rectified filter D rectification
After filtering, the direct current signal DC-OUT being not zero is obtained between two DC output ends of D.
4, when the connecting cable on neutral electrode connector S-NE1 and S-NE2 interrupts simultaneously, (tissue) nothing is loaded
High-frequency current flows through, the output channel of first capacitor C1 and the second capacitor C2 composition high-frequency current.Because of first capacitor C1 and second
The capacitance of capacitor C2 is unequal, the high-frequency current i on first coil L1L1With the high-frequency current i on the second coil L2L2It is exhausted
To be worth it is unequal, the magnetic flux in magnetic core is not zero, tertiary coil L3 be coupled to the consistent high-frequency signal of rated frequency, through whole
After flowing filter D rectifying and wave-filtering, the direct current signal DC-OUT being not zero is obtained between two DC output ends of D.
5, when neutral electrode and bad patient contact, the high-frequency current for flowing through capacitor C1 and C2 can change, the
High-frequency current i on one coil L1L1With the high-frequency current i on the second coil L2L2Order of magnitude it is unequal, in magnetic core
Magnetic flux is not zero, and tertiary coil L3 is coupled to and the consistent high-frequency signal of rated frequency, rectified filter D rectifying and wave-filtering
Afterwards, the direct current signal DC-OUT being not zero is obtained between two DC output ends of D.
The passive passive type neutral electrode monitoring device of one kind provided by the invention, when neutral electrode connecting cable or its company
It connects when electrical breaks occurs in device or neutral electrode and when bad patient contact, can monitor high frequency electrical signal on tertiary coil.When
When high-frequency energy generator is in output state, neutral electrode connector, connecting cable and neutral electrode and patient contact are good
When good, without high frequency electrical signal on tertiary coil.Monitoring device is without separately setting power supply, exciting signal source and isolation circuit, device knot
Structure is simple, and implementation cost is low.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (9)
1. a kind of neutral electrode monitoring device, which is characterized in that the monitoring device includes: first coil, the second coil, third
Coil, first capacitor and the second capacitor, wherein
The first coil, second coil and the tertiary coil intercouple；The first coil and second line
The inductance of circle is equal；The first end of the first coil and the first end of second coil Same Name of Ends each other；
First output end of high-frequency energy generator respectively with the first end of the first capacitor and second capacitor first
End connection, the second end of the first capacitor connect with one end of neutral electrode connector, the second end of second capacitor and
The other end of the neutral electrode connector connects；
The second output terminal of high-frequency energy generator respectively with the first end of the first coil and second coil second
End connection, the second end of the first coil connect with the second end of the first capacitor, the first end of second coil and
The second end of second capacitor connects.
2. monitoring device according to claim 1, which is characterized in that the monitoring device further includes rectification circuit, described
Tertiary coil is connect with the rectification circuit.
3. monitoring device according to claim 2, which is characterized in that the rectification circuit is bridge rectifier.
4. monitoring device according to claim 2, which is characterized in that the monitoring device further includes filter circuit, described
The input terminal of filter circuit is connect with the output end of the rectification circuit.
5. monitoring device according to claim 4, which is characterized in that the monitoring device further includes indicator light, the finger
Show that lamp and the output end of the filter circuit are connect.
6. monitoring device according to claim 4, which is characterized in that the monitoring device further includes buzzer, the bee
Ring device is connect with the output end of the filter circuit.
7. monitoring device according to claim 1, which is characterized in that the first coil, second coil and described
Tertiary coil is wound on a magnetic core.
8. monitoring device according to claim 7, which is characterized in that the magnetic core is toroidal core.
9. monitoring device according to claim 1, which is characterized in that the capacitor of the first capacitor and second capacitor
It is worth unequal.
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| CN201910136015.3A CN109856496B (en) | 2019-02-25 | 2019-02-25 | Neutral electrode monitoring device |
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| CN201910136015.3A CN109856496B (en) | 2019-02-25 | 2019-02-25 | Neutral electrode monitoring device |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2177309B (en) * | 1985-07-04 | 1990-03-14 | Erbe Elektromedizin | High-frequency surgical instrument |
| TW200505288A (en) * | 2003-07-30 | 2005-02-01 | Matsushita Electric Ind Co Ltd | Cold cathode fluorescent lamp driver circuit |
| CN101185790A (en) * | 2006-11-17 | 2008-05-28 | 因迪巴有限公司 | High heat equipment |
| CN100409821C (en) * | 2004-05-25 | 2008-08-13 | 爱尔伯电子医疗设备公司 | Method and measuring device for determining the transient impedance between two partial electrodes of a divided neutral electrode |
| CN101489476A (en) * | 2006-07-10 | 2009-07-22 | 松下电器产业株式会社 | Skin conductivity measuring device |
| CN201724996U (en) * | 2010-06-22 | 2011-01-26 | 李楚雅 | Neutral electrode detection circuit |
| CN201861755U (en) * | 2010-12-01 | 2011-06-15 | 天津市赛盟医疗科技有限公司 | Medical high-frequency electric knife |
| CN102215768A (en) * | 2007-10-24 | 2011-10-12 | 塞隆医疗设备公司 | Hf-surgery device and method for an hf-surgery device |
| TW201212499A (en) * | 2010-01-13 | 2012-03-16 | Toshiba Kk | Grid-tie inverter |
| CN102590631A (en) * | 2012-03-16 | 2012-07-18 | 珠海市国腾科技发展有限公司 | Detection circuit for detecting contact impedance between high-frequency electrotome neutral polar plate and patient |
| CN102846366A (en) * | 2011-06-30 | 2013-01-02 | 厄比电子医学有限责任公司 | Method and device for optimized coagulation of biological tissue |
| TW201336215A (en) * | 2012-02-21 | 2013-09-01 | Tpv Electronics Fujian Co Ltd | Power converter |
| CN108478277A (en) * | 2018-04-08 | 2018-09-04 | 河南优德医疗设备股份有限公司 | A kind of physiotherapy and rehabilitation equipment based on high frequency heat penetration technology |
-
2019
- 2019-02-25 CN CN201910136015.3A patent/CN109856496B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2177309B (en) * | 1985-07-04 | 1990-03-14 | Erbe Elektromedizin | High-frequency surgical instrument |
| TW200505288A (en) * | 2003-07-30 | 2005-02-01 | Matsushita Electric Ind Co Ltd | Cold cathode fluorescent lamp driver circuit |
| CN100409821C (en) * | 2004-05-25 | 2008-08-13 | 爱尔伯电子医疗设备公司 | Method and measuring device for determining the transient impedance between two partial electrodes of a divided neutral electrode |
| CN101489476A (en) * | 2006-07-10 | 2009-07-22 | 松下电器产业株式会社 | Skin conductivity measuring device |
| CN101185790A (en) * | 2006-11-17 | 2008-05-28 | 因迪巴有限公司 | High heat equipment |
| CN102215768A (en) * | 2007-10-24 | 2011-10-12 | 塞隆医疗设备公司 | Hf-surgery device and method for an hf-surgery device |
| TW201212499A (en) * | 2010-01-13 | 2012-03-16 | Toshiba Kk | Grid-tie inverter |
| CN201724996U (en) * | 2010-06-22 | 2011-01-26 | 李楚雅 | Neutral electrode detection circuit |
| CN201861755U (en) * | 2010-12-01 | 2011-06-15 | 天津市赛盟医疗科技有限公司 | Medical high-frequency electric knife |
| CN102846366A (en) * | 2011-06-30 | 2013-01-02 | 厄比电子医学有限责任公司 | Method and device for optimized coagulation of biological tissue |
| TW201336215A (en) * | 2012-02-21 | 2013-09-01 | Tpv Electronics Fujian Co Ltd | Power converter |
| CN102590631A (en) * | 2012-03-16 | 2012-07-18 | 珠海市国腾科技发展有限公司 | Detection circuit for detecting contact impedance between high-frequency electrotome neutral polar plate and patient |
| CN108478277A (en) * | 2018-04-08 | 2018-09-04 | 河南优德医疗设备股份有限公司 | A kind of physiotherapy and rehabilitation equipment based on high frequency heat penetration technology |
Non-Patent Citations (2)
| Title |
|---|
| N.H. NESSLER: "Risk analysis and risk minimizing measures for neutral electrodes in electrosurgery", 《PROCEEDINGS OF 18TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY》 * |
| 陈聪: "高频手术设备标准GB9706.4-2009条款59.104.6检测方法研究", 《中外医疗》 * |
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