CN204330892U - A kind of high-frequency treatment device on resistance testing circuit - Google Patents
A kind of high-frequency treatment device on resistance testing circuit Download PDFInfo
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- CN204330892U CN204330892U CN201520008960.2U CN201520008960U CN204330892U CN 204330892 U CN204330892 U CN 204330892U CN 201520008960 U CN201520008960 U CN 201520008960U CN 204330892 U CN204330892 U CN 204330892U
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Abstract
The utility model discloses a kind of high-frequency treatment device on resistance testing circuit, comprise: the first impedance detection unit, put on the measured resistance in tested loop for generation of the first high-frequency current signal, receive the first voltage signal produced after putting on described measured resistance simultaneously; Second impedance detection unit, puts on the measured resistance in tested loop for generation of the second high-frequency current signal, the second voltage signal produced after simultaneously receiving described measured resistance; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal; Processing unit calculates the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, calculates the resistance of described measured resistance according to described first resistance value and the second resistance value.The utility model, in high-frequency treatment device on resistance measure loop serial connection or when not being connected in series equivalent inductance or equivalent capacity, all can detect measured resistance value exactly.
Description
Technical field
The utility model relates to high-frequency treatment apparatus field, particularly a kind of high-frequency treatment device on resistance testing circuit.
Background technology
The resistor detection method being applied to high-frequency treatment equipment mainly contains two kinds at present.When one method is high-frequency treatment equipment output high-power high-frequency energy, by detecting HF voltage and high-frequency current, measured resistance=HF voltage/high-frequency current is adopted to calculate measured resistance value.The defect of this method can only detect measured resistance value when high-frequency treatment equipment exports high-power high-frequency energy, and high-frequency treatment equipment often only exports high-power high-frequency energy at short notice, measured resistance value can not be detected in the most of the time not exporting high-frequency energy.
Another kind method is that high-frequency treatment equipment exports faint high-frequency current signal, is detected the voltage of measured resistance by filtering circuit, amplifying circuit and rectification circuit, utilizes the voltage of measured resistance and the corresponding relation of measured resistance to calculate measured resistance value.The impedance (Z=R+j ω L or Z=R+(1/j ω C) in what in fact this High-frequency weak signal detection impedance methodologies detected is tested loop, wherein L, C are equivalent inductance, the equivalent capacitys in tested loop).When the equivalent inductance in tested loop and equivalent capacity less time, can think that what detect is exactly measured resistance value.This method due to export high-frequency signal very faint, suitable long-time continuous is applied on tested loop, and high-frequency treatment equipment can detect measured resistance value within the whole service time.This High-frequency weak signal detection impedance methodologies is applied in increasing high-frequency treatment equipment.
But along with the development of science and technology, the applied environment of high-frequency treatment equipment becomes and becomes increasingly complex, and often has miscellaneous equipment (or other ingredients of high-frequency treatment equipment self) to be connected in the measure loop of high-frequency treatment equipment.These miscellaneous equipments are due to the needs of self function, and may there is perception or capacitive components and parts and circuit in the part of the measure loop being connected to high-frequency treatment equipment, this is equivalent in the measure loop of high-frequency treatment equipment, be connected in series equivalent inductance or equivalent capacity.The equivalent inductance larger due to these or the impact of equivalent capacity, the resistance detection value adopting High-frequency weak signal detection impedance methodologies to obtain can be bigger than normal, can not reflect measured resistance value truly.Therefore a kind of technological means is needed can to eliminate the impact of these equivalent inductances or equivalent capacity.
Utility model content
The purpose of this utility model is that the High-frequency weak signal detection resistive method adopted for current high-frequency treatment equipment correctly can not detect the defect of measured resistance value when measure loop serial connection equivalent inductance or equivalent capacity, a kind of high-frequency treatment device on resistance testing circuit is provided, it can in high-frequency treatment device on resistance measure loop serial connection or when not being connected in series equivalent inductance or equivalent capacity, all can detect measured resistance value exactly, reach the defect making up existing High-frequency weak signal detection impedance methodologies.
In order to realize foregoing invention object, the technical solution adopted in the utility model is: a kind of high-frequency treatment device on resistance testing circuit, comprising:
First impedance detection unit, for generation of the first high-frequency current signal, described first high-frequency current signal puts on the measured resistance in tested loop, receives the first voltage signal produced after described first high-frequency current signal puts on described measured resistance simultaneously;
Second impedance detection unit, for generation of the second high-frequency current signal, described second high-frequency current signal puts on the measured resistance in tested loop, receives the second voltage signal produced after described second high-frequency current signal puts on described measured resistance simultaneously; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal;
Processing unit, for receiving described first voltage signal and the second voltage signal that described first impedance detection unit and the second impedance detection unit export respectively, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value.
Preferably, described first impedance detection unit and the second impedance detection unit include:
High-frequency current signal produces circuit, for generation of high-frequency current signal;
Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously;
Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carries out amplification process to described voltage signal;
Precise rectification circuit, carries out rectification process for the described voltage signal after amplifying described amplifying circuit and exports.
Preferably, described first impedance detection unit and the second impedance detection unit include:
High-frequency current signal produces circuit, for generation of high-frequency current signal;
Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously;
Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carrying out amplification to described voltage signal and processes and export.
Preferably, also comprising AD conversion unit, after the described voltage signal for exporting first, second impedance detection unit described carries out analog to digital conversion, outputting to described processing unit.
Preferably, the described processing unit specifically resistance R of measured resistance according to following formulae discovery:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
The utility model also provides a kind of high-frequency treatment device on resistance testing circuit, comprises processing unit, the first impedance detection unit and the second impedance detection unit; Described processing unit is for generation of the first high-frequency current signal and the second high-frequency current signal, and described first high-frequency current signal and the second high-frequency current signal put on the measured resistance in tested loop respectively; First impedance detection unit, for receiving the first voltage signal produced after described first high-frequency current signal puts on described measured resistance; Second impedance detection unit, for receiving the second voltage signal produced after described second high-frequency current signal puts on described measured resistance; Described processing unit is also for receiving described first voltage signal and the second voltage signal that described first impedance detection unit and the second impedance detection unit export respectively, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal.
Preferably, described first impedance detection unit and the second impedance detection unit include:
Filtering circuit, for receiving the first voltage signal or the second voltage signal that produce after described first high-frequency current signal or described second high-frequency current signal put on described measured resistance, eliminate the undesired signal beyond described first voltage signal or the second voltage signal simultaneously;
Amplifying circuit, for receiving described first voltage signal or second voltage signal of the output of described filtering circuit, carries out amplification process to described first voltage signal or the second voltage signal;
Precise rectification circuit, for carrying out rectification process to described first voltage signal after described amplifying circuit amplification or the second voltage signal and export.
Preferably, described first impedance detection unit and the second impedance detection unit include:
High-frequency current signal produces circuit, for generation of high-frequency current signal;
Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously;
Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carrying out amplification to described voltage signal and processes and export.
Preferably, also comprise AD conversion unit, output to described processing unit for described first voltage signal, the second voltage signal exported respectively first, second impedance detection unit described after carrying out analog to digital conversion.
Preferably, the described processing unit specifically resistance R of measured resistance according to following formulae discovery:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
compared with prior art, the beneficial effects of the utility model:
Two impedance detection unit are adopted in the utility model, high frequency low current signal is adopted to detect impedance methodologies, detect two resistance values in tested loop respectively, the frequency of the high-frequency current signal of two impedance detection unit is different, therefore when tested loop serial connection equivalent inductance or equivalent capacity, detect two the resistance value differences obtained, processing unit calculates measured resistance value according to these two different resistance values, measured resistance value can be detected exactly like this, make up the defect of existing High-frequency weak signal detection impedance methodologies, reach and have a mind to or be not intended to be connected in series also can correctly detect measured resistance value into when equivalent inductance or electric capacity in the measure loop of high-frequency treatment equipment, enable high-frequency treatment equipment smoothly and other equipment conbined usage.The utility model can be connected in series or when not being connected in series equivalent inductance or equivalent capacity, all can detect measured resistance value exactly in the resistance detection loop in high-frequency treatment equipment.
accompanying drawing illustrates:
Fig. 1 is the resistance detecting circuit schematic diagram in the utility model embodiment 1;
Fig. 2 is the resistance detecting circuit schematic diagram in the utility model embodiment 2;
Fig. 3 is the resistance detecting circuit schematic diagram in the utility model embodiment 3;
Fig. 4 is the resistance detecting circuit schematic diagram in the utility model embodiment 4.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following embodiment, all technology realized based on the utility model content all belong to scope of the present utility model.
The utility model is in order to make up the defect of existing High-frequency weak signal detection impedance methodologies, reach and have a mind to or be not intended to be connected in series also can correctly detect measured resistance value into when equivalent inductance or electric capacity in the measure loop of high-frequency treatment equipment, enable high-frequency treatment equipment smoothly and other equipment conbined usage, adopt two impedance detection unit to produce the different high frequency low current signal of frequency respectively to detect impedance, detect two resistance values in tested loop respectively.The frequency of the high-frequency current signal that two impedance detection unit produce is different, and therefore when tested loop serial connection equivalent inductance or equivalent capacity, two the resistance value differences detected, processing unit accurately calculates measured resistance value according to these two different resistance values.The utility model is illustrated below in conjunction with drawings and Examples.
embodiment 1:
High-frequency treatment device on resistance testing circuit as shown in Figure 1, comprises the first impedance detection unit 1, second impedance detection unit 2 and processing unit 3.First impedance detection unit 1 is for generation of the first high-frequency current signal, described first high-frequency current signal puts on the measured resistance (not shown) in tested loop, receives the first voltage signal produced after described first high-frequency current signal puts on described measured resistance simultaneously.Second impedance detection unit 2 is for generation of the second high-frequency current signal, and described second high-frequency current signal puts on the measured resistance in tested loop, receives the second voltage signal produced after described second high-frequency current signal puts on described measured resistance simultaneously; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal and be generally the high frequency low current signal of μ A level, mA level or nA level; Processing unit 3 is for described first voltage signal that receives described first impedance detection unit 1 and the second impedance detection unit 2 and export respectively and the second voltage signal, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value.
Concrete, described first impedance detection unit 1 and the second impedance detection unit 2 include: high-frequency current signal produces circuit (can adopt as microprocessor chip or the circuit based on programmable logic device (PLD) formations such as FPGA, CPLD), for generation of high-frequency current signal (being generally the high-frequency current signal of μ A level, mA level or nA level); Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously; Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carries out amplification process to described voltage signal; And precise rectification circuit, carry out rectification process for the described voltage signal after amplifying described amplifying circuit and export.
This resistance detecting circuit also comprises AD conversion unit 4(as ADC conversion chip), output to described processing unit 3 after the described voltage signal for exporting first, second impedance detection unit described (1,2) carries out analog to digital conversion.Described processing unit 3(is as microprocessor, microcontroller, process chip or circuit etc. based on FPGA or CPLD) the concrete resistance R of measured resistance according to following formulae discovery:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
The utility model resistance detecting circuit is made up of two impedance detection unit, AD conversion unit circuit and processing unit.Wherein impedance detection unit produces circuit by high-frequency current signal, filtering circuit, amplifying circuit, rectification circuit form, and adopts high frequency low current signal to detect impedance.
Resistance detecting circuit has two impedance detection unit.These two impedance detection unit adopt high-frequency current signal to detect impedance, detect the impedance in tested loop respectively.The frequency of the high frequency weak signal of two impedance detection unit is different, and therefore when tested loop serial connection equivalent inductance or electric capacity, the detected value of two impedance detection circuits is different, and processing unit calculates measured resistance value according to these two different impedance detection values.
Concrete, impedance detection unit is made up of high frequency weak signal generation circuit, filtering circuit, amplifying circuit, rectification circuit.High frequency weak signal is applied in measured resistance, the voltage that high frequency weak signal produces in measured resistance eliminates other undesired signals beyond high-frequency current signal by filtering circuit, through amplifying and exporting to AD conversion unit circuit after precision rectifying, then calculate impedance detection value Z by processing unit.
Resistance detecting circuit has two impedance detection unit.The frequency of the high-frequency current signal of two impedance detection unit outputs is different, and this is the basis that can be calculated measured resistance value by two impedance detection values.
Calculate measured resistance value by two impedance detection values to be specially: be connected in series equivalent inductance for tested loop,
Two are detected resistance value and can be expressed as: Z
1=R+j ω
1l, Z
2=R+j ω
2l.
If: K=ω
1/ ω
2--------------------------------(1);
: R
2=(Z
1 2-K
2z
2 2)/(1-K
2)--------------------------------(2);
If: G=1/ (1-K
2)--------------------------------(3);
: R=(GZ
1 2-(G-1) Z
2 2)
1/2--------------------------------(4).
In like manner, when tested loop serial connection equivalent capacity, also same formula can be drawn.
For resistance detecting circuit, coefficient G is a constant, can be calculated by formula (1) and (3) by the frequency ratio of two high-frequency current signals, or is obtained by test.With the impedance detection value Z of impedance detection unit
1and Z
2, just can calculate measured resistance value R according to formula (4).
The utility model reaches to be had a mind to or is not intended to be connected in series the beneficial effect into also correctly detecting measured resistance value when equivalent inductance or electric capacity in the measure loop of high-frequency treatment equipment, enables high-frequency treatment equipment smoothly and other equipment conbined usage.
embodiment 2:
As shown in Figure 2, the present embodiment is only with the difference implementing 1, and described first impedance detection unit 1 and the second impedance detection unit 2 replace with and include separately: high-frequency current signal produces circuit, for generation of high-frequency current signal; Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously; Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carrying out amplification to described voltage signal and processes and export.Eliminate precise rectification circuit in first impedance detection unit 1 and the second impedance detection unit 2 in the present embodiment, directly gathered the voltage signal of amplifying circuit output by AD conversion unit 4.All the other something in common please refer to the associated description in embodiment 1, no longer describe in detail herein.
embodiment 3:
High-frequency treatment device on resistance testing circuit as shown in Figure 3, comprises processing unit 3, first impedance detection unit 1 and the second impedance detection unit 2; Described processing unit 3 is for generation of the first high-frequency current signal and the second high-frequency current signal, and described first high-frequency current signal and the second high-frequency current signal put on the measured resistance (not shown) in tested loop respectively; First impedance detection unit 1, for receiving the first voltage signal produced after described first high-frequency current signal puts on described measured resistance; Second impedance detection unit 2, for receiving the second voltage signal produced after described second high-frequency current signal puts on described measured resistance; Described processing unit 3 is also for receiving described first voltage signal and the second voltage signal that described first impedance detection unit 1 and the second impedance detection unit 2 export respectively, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal and be generally the high frequency low current signal of μ A level, mA level or nA level.
Concrete, described first impedance detection unit 1 and the second impedance detection unit 2 include: filtering circuit, for receiving the first voltage signal or the second voltage signal that produce after described first high-frequency current signal or described second high-frequency current signal put on described measured resistance, eliminate the undesired signal beyond described first voltage signal or the second voltage signal simultaneously; Amplifying circuit, for receiving described first voltage signal or second voltage signal of the output of described filtering circuit, carries out amplification process to described first voltage signal or the second voltage signal; And precise rectification circuit, for carrying out rectification process to described first voltage signal after described amplifying circuit amplification or the second voltage signal and export.
This resistance detecting circuit also comprises AD conversion unit 4(as ADC conversion chip), output to described processing unit 3 after carrying out analog to digital conversion for described first voltage signal, the second voltage signal exported respectively first, second impedance detection unit described (1,2).Described processing unit 3(is as microprocessor, microcontroller, process chip or circuit etc. based on FPGA or CPLD) the concrete resistance R of measured resistance according to following formulae discovery:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
Resistance detecting circuit has two impedance detection unit.The frequency of the high-frequency current signal of two impedance detection unit outputs is different, and this is the basis that can be calculated measured resistance value by two impedance detection values.
Calculate measured resistance value by two impedance detection values to be specially: be connected in series equivalent inductance for tested loop,
Two are detected resistance value and can be expressed as: Z
1=R+j ω
1l, Z
2=R+j ω
2l.
If: K=ω
1/ ω
2--------------------------------(1);
: R
2=(Z
1 2-K
2z
2 2)/(1-K
2)--------------------------------(2);
If: G=1/ (1-K
2)--------------------------------(3);
: R=(GZ
1 2-(G-1) Z
2 2)
1/2--------------------------------(4).
In like manner, when tested loop serial connection equivalent capacity, also same formula can be drawn.
For resistance detecting circuit, coefficient G is a constant, can be calculated by formula (1) and (3) by the frequency ratio of two high-frequency current signals, or is obtained by test.With the impedance detection value Z of impedance detection unit
1and Z
2, just can calculate measured resistance value R according to formula (4).
The utility model reaches to be had a mind to or is not intended to be connected in series the beneficial effect into also correctly detecting measured resistance value when equivalent inductance or electric capacity in the measure loop of high-frequency treatment equipment, enables high-frequency treatment equipment smoothly and other equipment conbined usage.
embodiment 4:
As shown in Figure 4, the present embodiment is only with the difference implementing 3, and described first impedance detection unit 1 and the second impedance detection unit 2 replace with and include separately: high-frequency current signal produces circuit, for generation of high-frequency current signal; Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously; Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carrying out amplification to described voltage signal and processes and export.Eliminate precise rectification circuit in first impedance detection unit 1 and the second impedance detection unit 2 in the present embodiment, directly gathered the voltage signal of amplifying circuit output by AD conversion unit 4.All the other something in common please refer to the associated description in embodiment 3, no longer describe in detail herein.
Two impedance detection unit are adopted in the utility model, high frequency low current signal is adopted to detect impedance methodologies, detect two resistance values in tested loop respectively, the frequency of the high-frequency current signal of two impedance detection unit is different, therefore when tested loop serial connection equivalent inductance or equivalent capacity, detect two the resistance value differences obtained, processing unit calculates measured resistance value according to these two different resistance values, measured resistance value can be detected exactly like this, make up the defect of existing High-frequency weak signal detection impedance methodologies, reach and have a mind to or be not intended to be connected in series also can correctly detect measured resistance value into when equivalent inductance or electric capacity in the measure loop of high-frequency treatment equipment, enable high-frequency treatment equipment smoothly and other equipment conbined usage.
By reference to the accompanying drawings embodiment of the present utility model is described in detail above, but the utility model is not restricted to above-mentioned embodiment, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (10)
1. a high-frequency treatment device on resistance testing circuit, is characterized in that, comprising:
First impedance detection unit, for generation of the first high-frequency current signal, described first high-frequency current signal puts on the measured resistance in tested loop, receives the first voltage signal produced after described first high-frequency current signal puts on described measured resistance simultaneously;
Second impedance detection unit, for generation of the second high-frequency current signal, described second high-frequency current signal puts on the measured resistance in tested loop, receives the second voltage signal produced after described second high-frequency current signal puts on described measured resistance simultaneously; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal;
Processing unit, for receiving described first voltage signal and the second voltage signal that described first impedance detection unit and the second impedance detection unit export respectively, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value.
2. high-frequency treatment device on resistance testing circuit according to claim 1, is characterized in that, described first impedance detection unit and the second impedance detection unit include:
High-frequency current signal produces circuit, for generation of high-frequency current signal;
Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously;
Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carries out amplification process to described voltage signal;
Precise rectification circuit, carries out rectification process for the described voltage signal after amplifying described amplifying circuit and exports.
3. high-frequency treatment device on resistance testing circuit according to claim 1, is characterized in that, described first impedance detection unit and the second impedance detection unit include:
High-frequency current signal produces circuit, for generation of high-frequency current signal;
Filtering circuit, for receiving the voltage signal produced after described high-frequency current signal puts on described measured resistance, eliminates the undesired signal beyond described voltage signal simultaneously;
Amplifying circuit, for receiving the described voltage signal that described filtering circuit exports, carrying out amplification to described voltage signal and processes and export.
4. the high-frequency treatment device on resistance testing circuit according to Claims 2 or 3, it is characterized in that, also comprising AD conversion unit, after the described voltage signal for exporting first, second impedance detection unit described carries out analog to digital conversion, outputting to described processing unit.
5. high-frequency treatment device on resistance testing circuit according to claim 4, is characterized in that, described processing unit is the resistance R of measured resistance according to following formulae discovery specifically:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
6. a high-frequency treatment device on resistance testing circuit, is characterized in that, comprises processing unit, the first impedance detection unit and the second impedance detection unit;
Described processing unit is for generation of the first high-frequency current signal and the second high-frequency current signal, and described first high-frequency current signal and the second high-frequency current signal put on the measured resistance in tested loop respectively;
First impedance detection unit, for receiving the first voltage signal produced after described first high-frequency current signal puts on described measured resistance;
Second impedance detection unit, for receiving the second voltage signal produced after described second high-frequency current signal puts on described measured resistance;
Described processing unit is also for receiving described first voltage signal and the second voltage signal that described first impedance detection unit and the second impedance detection unit export respectively, calculate the first resistance value and the second resistance value respectively according to described first voltage signal and the second voltage signal, then calculate the resistance of described measured resistance according to described first resistance value and the second resistance value; Wherein, described first high-frequency current signal is different from the frequency of described second high-frequency current signal.
7. high-frequency treatment device on resistance testing circuit according to claim 6, is characterized in that, described first impedance detection unit and the second impedance detection unit include:
Filtering circuit, for receiving the first voltage signal or the second voltage signal that produce after described first high-frequency current signal or described second high-frequency current signal put on described measured resistance, eliminate the undesired signal beyond described first voltage signal or the second voltage signal simultaneously;
Amplifying circuit, for receiving described first voltage signal or second voltage signal of the output of described filtering circuit, carries out amplification process to described first voltage signal or the second voltage signal;
Precise rectification circuit, for carrying out rectification process to described first voltage signal after described amplifying circuit amplification or the second voltage signal and export.
8. high-frequency treatment device on resistance testing circuit according to claim 6, is characterized in that, described first impedance detection unit and the second impedance detection unit include:
Filtering circuit, for receiving the first voltage signal or the second voltage signal that produce after described first high-frequency current signal or described second high-frequency current signal put on described measured resistance, eliminate the undesired signal beyond described first voltage signal or the second voltage signal simultaneously;
Amplifying circuit, for receiving described first voltage signal or second voltage signal of the output of described filtering circuit, carrying out amplification to described first voltage signal or the second voltage signal and processes and export.
9. the high-frequency treatment device on resistance testing circuit according to claim 7 or 8, it is characterized in that, also comprise AD conversion unit, output to described processing unit for described first voltage signal, the second voltage signal exported respectively first, second impedance detection unit described after carrying out analog to digital conversion.
10. high-frequency treatment device on resistance testing circuit according to claim 9, is characterized in that, described processing unit is the resistance R of measured resistance according to following formulae discovery specifically:
R=(GZ
1 2-(G-1) Z
2 2)
1/2; Wherein Z
1for described first resistance value, Z
2for described second resistance value, G=1/ (1-K
2), K=ω
1/ ω
2, ω
1for the frequency of described first high-frequency current signal, ω
2for the frequency of described second high-frequency current signal.
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| CN201520008960.2U CN204330892U (en) | 2015-01-07 | 2015-01-07 | A kind of high-frequency treatment device on resistance testing circuit |
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| CN201520008960.2U CN204330892U (en) | 2015-01-07 | 2015-01-07 | A kind of high-frequency treatment device on resistance testing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502723A (en) * | 2015-01-07 | 2015-04-08 | 四川锦江电子科技有限公司 | Resistor detection circuit of high-frequency therapeutic equipment |
| CN110297124A (en) * | 2019-08-06 | 2019-10-01 | 南方电网科学研究院有限责任公司 | A kind of ungrounded formula voltage measuring apparatus and method |
| CN113311240A (en) * | 2021-07-29 | 2021-08-27 | 佛山市联动科技股份有限公司 | Superheterodyne high-frequency impedance test equipment |
-
2015
- 2015-01-07 CN CN201520008960.2U patent/CN204330892U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502723A (en) * | 2015-01-07 | 2015-04-08 | 四川锦江电子科技有限公司 | Resistor detection circuit of high-frequency therapeutic equipment |
| CN104502723B (en) * | 2015-01-07 | 2018-02-06 | 四川锦江电子科技有限公司 | High-frequency treatment device on resistance detects circuit |
| CN110297124A (en) * | 2019-08-06 | 2019-10-01 | 南方电网科学研究院有限责任公司 | A kind of ungrounded formula voltage measuring apparatus and method |
| CN110297124B (en) * | 2019-08-06 | 2022-04-12 | 南方电网科学研究院有限责任公司 | Non-grounded voltage measuring device and method |
| CN113311240A (en) * | 2021-07-29 | 2021-08-27 | 佛山市联动科技股份有限公司 | Superheterodyne high-frequency impedance test equipment |
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