CN205049658U - Detection apparatus for impedance between high frequency electric sword patient polar plate - Google Patents
Detection apparatus for impedance between high frequency electric sword patient polar plate Download PDFInfo
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- CN205049658U CN205049658U CN201520718631.7U CN201520718631U CN205049658U CN 205049658 U CN205049658 U CN 205049658U CN 201520718631 U CN201520718631 U CN 201520718631U CN 205049658 U CN205049658 U CN 205049658U
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- 238000001514 detection method Methods 0.000 title abstract description 10
- 230000001131 transforming effect Effects 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 4
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a detection apparatus for impedance between high frequency electric sword patient polar plate, including signal generator, measuring circuit and treater, to the sinusoidal wave drive signal of measuring circuit input signal generator with measure circuit connection, the measuring circuit includes vary voltage circuit, bleeder circuit and rectifier circuit, the input of vary voltage circuit with bleeder circuit establishes ties, the output of vary voltage circuit is parallelly connected with the polar plate circuit, rectifier circuit connects in parallel bleeder circuit's both ends, the receipt by the direct current measuring -signal and the foundation of rectifier circuit output direct current measuring -signal confirms the resistance value of polar plate circuit the treater with rectifier circuit connects. With compare among the prior art, detection device receives influence of temperature little, can reduce measuring error, and is more accurate relatively to the measuring of resistance value between patient's polar plate.
Description
Technical field
The utility model relates to technical field of impedance detection, particularly relates to the pick-up unit of impedance between a kind of electric knife patient pole plate.
Background technology
Electric knife (also known as high frequency electro surgical unit) is operating conventional operating theater instruments, when it is contacted with human body by the high-frequency high-voltage current that active electrode tip produces, tissue is heated, realization is to the separation of when injected organism tissue and solidify, thus plays the object of cutting and hemostasis.Current electric knife instead of mechanical operation cutter substantially.
Patient's pole plate directly contacts with patient, has larger contact area with patient's human body, is be reduce impedance and current density, avoids leaving at high-frequency current continuing when injected organism tissue heating when human body returns electric knife and causing burn patients.Therefore when performing the operation, also Real-Time Monitoring being wanted to the impedance between patient's pole plate, to avoid occurring impedance too high, unexpected burning being caused to patient.
At present, bikini resonant circuit is adopted to measure impedance between patient's pole plate, but this detection mode, resonant circuit itself is easily by the impact of temperature, temperature drift is serious, therefore can cause larger measuring error, can form certain potential safety hazard in surgical procedure to patient.
Utility model content
The utility model provides the pick-up unit of impedance between a kind of electric knife patient pole plate, and relative to prior art, measuring error is little, relatively more accurate to the measurement of impedance between patient's pole plate.
For achieving the above object, the utility model provides the pick-up unit of impedance between a kind of electric knife patient pole plate, comprising: signal generator, metering circuit and processor;
Described signal generator to described metering circuit input sine wave drive singal is connected with described metering circuit;
Described metering circuit comprises transforming circuit, bleeder circuit and rectification circuit, and the input end of described transforming circuit is connected with described bleeder circuit, the output terminal of described transforming circuit and pole plate circuit in parallel, and described rectification circuit is connected in parallel on the two ends of described bleeder circuit;
The direct current measurement signal that reception is exported by described rectification circuit also determines that according to described direct current measurement signal the described processor of the resistance value of described pole plate circuit is connected with described rectification circuit.
Alternatively, described signal generator comprises:
Produce the signal generation unit of standard sine wave signal;
The signal filtering unit of that be connected with described signal generation unit, in standard sine wave signal described in filtering high-frequency harmonic;
That be connected with described signal filtering unit, amplify to be formed described sine wave drive signal to described standard sine wave signal signal amplification unit.
Alternatively, described transforming circuit comprises transformer;
The armature winding of described transformer is the input end of described transforming circuit, and the secondary winding of described transformer is the output terminal of described transforming circuit.
Alternatively, described bleeder circuit comprises the resistance with default resistance value.
Alternatively, described processor comprises:
Described direct current measurement signal is carried out to sampling processing, obtains the sampling unit of measuring voltage value:
Connect with described sampling unit, according to described measuring voltage value search from the voltage-impedance meter preset with the first magnitude of voltage that described measuring voltage value is close to and the second magnitude of voltage and first resistance value corresponding with described first magnitude of voltage and second resistance value corresponding with described second magnitude of voltage search unit, second magnitude of voltage described in measuring voltage value < described in wherein said first magnitude of voltage <, the corresponding relation of described voltage-impedance meter recording voltage value and resistance value;
That unit is connected, calculate the resistance value of described pole plate circuit according to described measuring voltage value, described first magnitude of voltage, described second magnitude of voltage, described first resistance value and described second resistance value computing unit is searched with described.
Alternatively, described processor also comprises the storage unit storing described voltage-impedance meter.
From above content, the pick-up unit of impedance between electric knife patient pole plate provided by the utility model, comprises signal generator, metering circuit and processor.Signal generator is connected with metering circuit, to metering circuit input sine wave drive singal.Described metering circuit comprises transforming circuit, bleeder circuit and rectification circuit, the input end of described transforming circuit is connected with bleeder circuit, output terminal and pole plate circuit in parallel, described bleeder circuit has default resistance value, the sine wave drive signal of input through described bleeder circuit, and is input to pole plate circuit after the process of described transforming circuit transformation; Described rectification circuit is connected in parallel on the two ends of described bleeder circuit, exports direct current measurement signal by described rectification circuit.Processor is connected with rectification circuit, and the described direct current measurement signal exported according to described rectification circuit determines the resistance value of described pole plate circuit.
Therefore, compared with adopting the detection mode of bikini resonant circuit in prior art, pick-up unit described in the utility model, when the resistance value of measuring pad circuit, is not subject to the impact of temperature, can measuring error be reduced, relatively more accurate to the detection of resistance value between patient's pole plate.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the pick-up unit of impedance between a kind of electric knife patient pole plate that Fig. 1 provides for the utility model embodiment;
The structural representation of signal generator in the pick-up unit that Fig. 2 provides for the utility model embodiment;
The structural representation of processor in the pick-up unit that Fig. 3 provides for the utility model embodiment.
Embodiment
Technical scheme in the utility model is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
Please refer to Fig. 1, the structural representation of the pick-up unit of impedance between a kind of electric knife patient pole plate that Fig. 1 provides for the utility model embodiment, described pick-up unit comprises: signal generator 100, metering circuit 200 and processor 300;
Described signal generator 100 to described metering circuit 200 input sine wave drive singal is connected with described metering circuit 200;
Described metering circuit 200 comprises transforming circuit 201, bleeder circuit 202 and rectification circuit 203, the input end of described transforming circuit 201 is connected with described bleeder circuit 202, the output terminal of described transforming circuit 201 and pole plate circuit in parallel, described rectification circuit 203 is connected in parallel on the two ends of described bleeder circuit 202;
The direct current measurement signal that reception is exported by described rectification circuit 203 also determines that according to described direct current measurement signal the described processor 300 of the resistance value of described pole plate circuit is connected with described rectification circuit 203.
Described pole plate circuit refer to patient's pole plate contact with patient's human body after the loop that formed, the resistance value between the resistance value of described pole plate circuit and patient's pole plate.Described signal generator 100 produces sine wave drive signal, to metering circuit 200 input sine wave drive singal.Metering circuit 200 comprises transforming circuit 201, bleeder circuit 202 and rectification circuit 203, wherein the input end of transforming circuit 201 is connected with bleeder circuit 202, output terminal and pole plate circuit in parallel, described bleeder circuit 202 has default resistance value, the sine wave drive signal of input through described bleeder circuit 202, and is input to pole plate circuit after the process of described transforming circuit 201 transformation; Described rectification circuit 203 is connected in parallel on the two ends of bleeder circuit 202, is converted to direct current signal for the AC signal exported by bleeder circuit 202, exports direct current measurement signal further by described rectification circuit 203.Described processor 300 is connected with described rectification circuit 203, and the direct current measurement signal exported according to described rectification circuit 203 determines the resistance value of described pole plate circuit.
Compared with adopting the detection mode of bikini resonant circuit in prior art, pick-up unit described in the present embodiment is when measuring the resistance value between patient's pole plate, not by the impact of temperature, can measuring error be reduced, therefore relatively more accurate to the detection of resistance value between patient's pole plate.
In the present embodiment, described signal generator 100 comprises signal generation unit 101, signal filtering unit 102 and signal amplification unit 103, please refer to Fig. 2, the structural representation of the signal generator that Fig. 2 provides for the present embodiment.Described signal generation unit 101 is for generation of standard sine wave signal, and signal generation unit 101 is connected with signal filtering unit 102, signal filtering unit 102 for will produce standard sine wave signal in high-frequency harmonic filtering.If high-frequency harmonic is input in metering circuit, larger electromagnetic radiation can be formed to patient, and high-frequency harmonic can cause producing leakage current between patient's pole plate, patient is damaged, therefore signalization filter unit in the present embodiment, high-frequency harmonic in filtering standard sine wave signal, can ensure the security detected patient.
Signal amplification unit 103 is connected with signal filtering unit 102, for amplifying standard sine wave signal, to form sine wave drive signal.The standard sine wave signal produced by signal generation unit, its amplitude is low, driving force is weak, patient's pole plate of electric knife cannot be driven to be attached to contact impedance on patient's human body, therefore signal amplification unit is adopted to amplify standard sine wave signal in the present embodiment, to obtain sine wave drive signal, be input in metering circuit.
Described metering circuit 200 comprises transforming circuit 201, bleeder circuit 202 and rectification circuit 203.Wherein, bleeder circuit 202 has default resistance value R
0, connect with the input end of transforming circuit 201.Bleeder circuit 202 described in the present embodiment is specially has default resistance value R
0resistance.
The output terminal of described transforming circuit 201 is in parallel with pole plate circuit (namely patient's pole plate contacts the rear loop formed with patient's human body), the sine wave drive signal of input, after described bleeder circuit 202, is input to pole plate circuit after the process of described transforming circuit 201 transformation.In the present embodiment, described transforming circuit 201 comprises transformer, wherein, the armature winding of described transformer is the input end of described transforming circuit, secondary winding is the primary windings connected in series of the output terminal of described transforming circuit, bleeder circuit and transformer, and pole plate circuit is in parallel with the secondary winding of transformer.Because the sine wave drive signal amplitude of input is comparatively large, and the patient's pole plate in pole plate circuit directly contacts with patient, and therefore based on safety problem, the sine wave drive signal of input will be input to pole plate circuit after the process of transforming circuit transformation.
Metering circuit described in the present embodiment to the measuring principle of the resistance value of pole plate circuit is: the sine wave drive signal U of input
iwith the resistance value R of bleeder circuit
oknown, the voltage U at bleeder circuit two ends
odrawn by test, according to formula R
x=R
o(U
i-U
o)/U
o, calculate the resistance value R of transforming circuit input end
x; Further, the turn ratio of known primary winding and secondary winding is N
1/ N
2, so according to formula R
x/ R
c=(N
1/ N
2)
2, then the resistance value R of pole plate circuit is calculated
c.
In the present embodiment, described rectification circuit 203 is connected in parallel on the two ends of bleeder circuit 202, is converted to direct current signal for the AC signal exported by bleeder circuit, to export direct current measurement signal.
Described processor 300 is connected with described rectification circuit 203, for receiving described direct current measurement signal, and determines the resistance value of described pole plate circuit according to described direct current measurement signal.In the present embodiment, described processor 300 comprises sampling unit 301, searches unit 302 and computing unit 303, please refer to Fig. 3, the structural representation of the processor that Fig. 3 provides for the present embodiment.Described sampling unit 301, for carrying out sampling processing to described direct current measurement signal, obtains measuring voltage value V
c; Search unit 302 to be connected with described sampling unit 301, for searching and described measuring voltage value V from the voltage-impedance meter preset according to described measuring voltage value
cthe first magnitude of voltage V of next-door neighbour
mwith the second magnitude of voltage V
m+1, and the first resistance value R corresponding with described first magnitude of voltage
mand the second resistance value R corresponding with described second magnitude of voltage
m+1, wherein, described first magnitude of voltage V
mmeasuring voltage value V described in <
csecond magnitude of voltage V described in <
m+1, the corresponding relation of described voltage-impedance meter recording voltage value and resistance value.In actual applications, according to the corresponding relation of the magnitude of voltage in the metering circuit setting voltage-impedance meter of reality and resistance value.
Described computing unit 303 is connected with described unit 302 of searching, for according to described measuring voltage value V
c, the first magnitude of voltage V
m, the second magnitude of voltage V
m+1, the first resistance value R
mwith the second resistance value R
m+1calculate the resistance value R of described pole plate circuit
c, concrete computing method are:
(R
c-R
m)/(R
m+1-R
m)＝(V
c-V
m)/(V
m+1-V
m)。
In the present embodiment, described processor 300 also comprises and the described storage unit 304 of searching unit 302 and being connected, for storing described voltage-impedance meter.
The pick-up unit of impedance between the electric knife patient pole plate described in the present embodiment, adopts sine wave drive signal to be input to metering circuit, measures, can reduce electromagnetic radiation and avoid leakage current, improve security the impedance between patient's pole plate; And described pick-up unit measuring accuracy is high, and temperature influence is little, good stability, relatively more accurate to the detection of impedance between patient's pole plate.
Above the pick-up unit of impedance between a kind of electric knife patient pole plate provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (6)
1. a pick-up unit for impedance between electric knife patient pole plate, is characterized in that, comprising: signal generator, metering circuit and processor;
Described signal generator to described metering circuit input sine wave drive singal is connected with described metering circuit;
Described metering circuit comprises transforming circuit, bleeder circuit and rectification circuit, and the input end of described transforming circuit is connected with described bleeder circuit, the output terminal of described transforming circuit and pole plate circuit in parallel, and described rectification circuit is connected in parallel on the two ends of described bleeder circuit;
The direct current measurement signal that reception is exported by described rectification circuit also determines that according to described direct current measurement signal the described processor of the resistance value of described pole plate circuit is connected with described rectification circuit.
2. pick-up unit as claimed in claim 1, it is characterized in that, described signal generator comprises:
Produce the signal generation unit of standard sine wave signal;
The signal filtering unit of that be connected with described signal generation unit, in standard sine wave signal described in filtering high-frequency harmonic;
That be connected with described signal filtering unit, amplify to be formed described sine wave drive signal to described standard sine wave signal signal amplification unit.
3. pick-up unit as claimed in claim 1, it is characterized in that, described transforming circuit comprises transformer;
The armature winding of described transformer is the input end of described transforming circuit, and the secondary winding of described transformer is the output terminal of described transforming circuit.
4. pick-up unit as claimed in claim 1, it is characterized in that, described bleeder circuit comprises the resistance with default resistance value.
5. the pick-up unit as described in any one of claim 1-4, is characterized in that, described processor comprises:
Described direct current measurement signal is carried out to sampling processing, obtains the sampling unit of measuring voltage value:
Connect with described sampling unit, according to described measuring voltage value search from the voltage-impedance meter preset with the first magnitude of voltage that described measuring voltage value is close to and the second magnitude of voltage and first resistance value corresponding with described first magnitude of voltage and second resistance value corresponding with described second magnitude of voltage search unit, second magnitude of voltage described in measuring voltage value < described in wherein said first magnitude of voltage <, the corresponding relation of described voltage-impedance meter recording voltage value and resistance value;
That unit is connected, calculate the resistance value of described pole plate circuit according to described measuring voltage value, described first magnitude of voltage, described second magnitude of voltage, described first resistance value and described second resistance value computing unit is searched with described.
6. pick-up unit as claimed in claim 5, it is characterized in that, described processor also comprises the storage unit storing described voltage-impedance meter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520718631.7U CN205049658U (en) | 2015-09-15 | 2015-09-15 | Detection apparatus for impedance between high frequency electric sword patient polar plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520718631.7U CN205049658U (en) | 2015-09-15 | 2015-09-15 | Detection apparatus for impedance between high frequency electric sword patient polar plate |
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| CN205049658U true CN205049658U (en) | 2016-02-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907744A (en) * | 2017-12-08 | 2018-04-13 | 赛诺微医疗科技（浙江）有限公司 | The measuring device and method of electric knife negative plate contact quality |
| CN112666397A (en) * | 2020-11-27 | 2021-04-16 | 大连理工大学 | Detection circuit and detection method for contact impedance of negative plate of high-frequency electrotome |
| CN113899788A (en) * | 2021-09-10 | 2022-01-07 | 广东百生医疗器械股份有限公司 | Electrode contact quality detection method, high-frequency electrotome and readable storage medium |
-
2015
- 2015-09-15 CN CN201520718631.7U patent/CN205049658U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907744A (en) * | 2017-12-08 | 2018-04-13 | 赛诺微医疗科技（浙江）有限公司 | The measuring device and method of electric knife negative plate contact quality |
| CN107907744B (en) * | 2017-12-08 | 2020-10-23 | 赛诺微医疗科技（浙江）有限公司 | Device and method for measuring contact quality of negative plate of high-frequency electrotome |
| CN112666397A (en) * | 2020-11-27 | 2021-04-16 | 大连理工大学 | Detection circuit and detection method for contact impedance of negative plate of high-frequency electrotome |
| CN112666397B (en) * | 2020-11-27 | 2024-03-19 | 大连理工大学 | High-frequency electrotome negative plate contact impedance detection circuit and detection method |
| CN113899788A (en) * | 2021-09-10 | 2022-01-07 | 广东百生医疗器械股份有限公司 | Electrode contact quality detection method, high-frequency electrotome and readable storage medium |
| CN113899788B (en) * | 2021-09-10 | 2023-11-24 | 广东百生医疗器械股份有限公司 | Electrode contact quality detection method, high-frequency electrotome and readable storage medium |
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Denomination of utility model: A device for measuring the impedance between plates of patients with high frequency electrotome Effective date of registration: 20210126 Granted publication date: 20160224 Pledgee: Agricultural Bank of China Limited Chongqing Yubei sub branch Pledgor: CHONGQING JINSHAN SCIENCE & TECHNOLOGY (GROUP) Co.,Ltd. Registration number: Y2021500000004 |
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Date of cancellation: 20220214 Granted publication date: 20160224 Pledgee: Agricultural Bank of China Limited Chongqing Yubei sub branch Pledgor: CHONGQING JINSHAN SCIENCE & TECHNOLOGY (GROUP) Co.,Ltd. Registration number: Y2021500000004 |
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Denomination of utility model: Detection device of inter plate impedance of patients with high frequency electrotome Effective date of registration: 20220627 Granted publication date: 20160224 Pledgee: Agricultural Bank of China Limited Chongqing Yubei sub branch Pledgor: CHONGQING JINSHAN SCIENCE & TECHNOLOGY (GROUP) Co.,Ltd. Registration number: Y2022500000034 |
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Date of cancellation: 20231020 Granted publication date: 20160224 Pledgee: Agricultural Bank of China Limited Chongqing Yubei sub branch Pledgor: Chongqing Jinshan Medical Technology Research Institute Co.,Ltd.|BEIJING ZHONGJIN SILICON VALLEY TECHNOLOGY CO.,LTD.|CHONGQING JINSHAN SCIENCE & TECHNOLOGY (GROUP) Co.,Ltd. Registration number: Y2022500000034 |
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