CN112087207A - High-power radio frequency circuit - Google Patents
High-power radio frequency circuit Download PDFInfo
- Publication number
- CN112087207A CN112087207A CN201910512565.0A CN201910512565A CN112087207A CN 112087207 A CN112087207 A CN 112087207A CN 201910512565 A CN201910512565 A CN 201910512565A CN 112087207 A CN112087207 A CN 112087207A
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- China
- Prior art keywords
- circuit
- power
- radio frequency
- human body
- mcu control
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- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims description 23
- 230000009467 reduction Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
Abstract
The invention discloses a high-power radio frequency circuit, which comprises an MCU control circuit, a signal isolation amplifying circuit, a radio frequency driving circuit, a human body contact identification circuit, a power output matching circuit and a handle, wherein the MCU control circuit is connected with the signal isolation amplifying circuit; the MCU control circuit outputs signals to the signal isolation amplifying circuit, the signal isolation amplifying circuit outputs the amplified signals to the radio frequency driving circuit, and the radio frequency driving circuit outputs high-power radio frequency signals which are output to the handle through the power output matching circuit and act on a human body; the human body contact identification circuit acquires a voltage signal fed back after a high-power radio-frequency signal acts on a human body, amplifies and filters the voltage signal, outputs a stable voltage signal to the MCU control circuit, and when the handle is not in human body contact, the stable voltage signal acquired by the MCU control circuit is small, and when the handle is in human body contact, the stable voltage acquired by the MCU control circuit exceeds a set threshold value. The invention can automatically recognize that the handle contacts with the human body, and has the advantages of high-power driving, large human body acting area, good effect and more intelligence.
Description
Technical Field
The invention relates to the technical field of radio frequency, in particular to a high-power radio frequency circuit.
Background
Medical products for applying radio frequency signals to the human body, such as radio frequency controlled thermal coagulators, radio frequency thermal skin treatment devices, and the like, are known in the prior art. Radio frequencies in the current market are dipole radio frequencies, and the range of the radio frequency applied to a human body is small, and the power is low. Without human body identification, the output power is always output, which is easy to give an emergency response to people and is similar to instant electric shock.
Disclosure of Invention
The invention provides a high-power radio frequency circuit, which solves the problems of small range and low power of acting on a human body in the prior art. The human body identification is not available, the output power is always output, an emergency response is easy to give people, and the problem of instant electric shock is similar.
The technical scheme of the invention is realized as follows:
a high-power radio frequency circuit comprises an MCU control circuit, a signal isolation amplifying circuit, a radio frequency driving circuit, a human body contact identification circuit, a power output matching circuit and a handle; the MCU control circuit outputs signals to the signal isolation amplifying circuit, the signal isolation amplifying circuit outputs the amplified signals to the radio frequency driving circuit, the radio frequency driving circuit outputs high-power radio frequency signals, and the high-power radio frequency signals are output to the handle through the power output matching circuit and act on a human body; the human body contact identification circuit acquires a voltage signal fed back after a high-power radio-frequency signal acts on a human body, amplifies and filters the voltage signal, and outputs a stable voltage signal to the MCU control circuit.
As a preferred embodiment of the present invention, the present invention further includes a power adjusting circuit and a power voltage-dropping circuit, the MCU control circuit is connected to the power adjusting circuit, the power adjusting circuit is connected to the power voltage-dropping circuit, and an output terminal of the power voltage-dropping circuit is connected to the radio frequency driving circuit; when the handle is not contacted by a human body, the power adjusting circuit controls the power within a smaller range; when no human body contacts the handle, the MCU control circuit can adjust the power voltage reduction circuit through the power adjustment circuit, so that the output power of the radio frequency driving circuit is increased to the set power.
As a preferred embodiment of the present invention, the present invention further includes a sampling circuit, the sampling circuit obtains the output power of the radio frequency driving circuit, and feeds the output power back to the MCU control circuit, and if a short circuit occurs, the MCU control circuit controls the power step-down circuit to stop working through the power adjusting circuit.
As a preferred embodiment of the present invention, the sampling circuit is a voltage sampling circuit or a current sampling circuit.
As a preferred embodiment of the present invention, the sampling circuit further includes a short-circuit protection circuit, and the short-circuit protection circuit is connected to the sampling circuit.
As a preferred embodiment of the present invention, the MCU control circuit further includes a digital step-down circuit and a power supply, wherein the power supply supplies power to the digital step-down circuit and the power step-down circuit, and the digital step-down circuit supplies power to the MCU control circuit.
As a preferred embodiment of the present invention, the rf driving circuit outputs a rf signal with a high power of 500K.
The invention has the beneficial effects that: the automatic identification handle contacts the human body, and is driven by high power, large in human body acting area, good in effect and more intelligent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of a high power RF circuit of the present invention;
FIG. 2 is a circuit diagram of a signal isolation amplifier circuit, a radio frequency driver circuit, a human contact identification circuit, and a power output matching circuit;
FIG. 3 is a circuit diagram of a power regulation circuit and a power step-down circuit;
fig. 4 is a circuit diagram of a sampling circuit and a short-circuit protection circuit.
In the figure, 1-MCU control circuit; 2-a signal isolation amplifying circuit; 3-a radio frequency driving circuit; 4-human contact identification circuit; 5-a power output matching circuit; 6-a handle; 7-a power regulation circuit; 8-a power step-down circuit; 9-a sampling circuit; 10-short circuit protection circuit; 11-a digital voltage reduction circuit; 12-power supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, the invention provides a high-power radio frequency circuit, which comprises an MCU control circuit 1, a signal isolation amplifying circuit 2, a radio frequency driving circuit 3, a human body contact recognition circuit 4, a power output matching circuit 5 and a handle 6; the MCU control circuit 1 outputs signals to the signal isolation amplifying circuit 2, the signal isolation amplifying circuit 2 outputs the amplified signals to the radio frequency driving circuit 3, the radio frequency driving circuit 3 outputs high-power radio frequency signals, and the high-power radio frequency signals are output to the handle 6 through the power output matching circuit 5 and act on a human body; the human body contact identification circuit 4 acquires a voltage signal fed back after a high-power radio-frequency signal acts on a human body, amplifies and filters the voltage signal, outputs a stable voltage signal to the MCU control circuit 1, the stable voltage signal acquired by the MCU control circuit 1 is small when the handle 6 is not in human body contact, and the stable voltage acquired by the MCU control circuit 1 exceeds a set threshold value when the handle 6 is in human body contact.
The invention also comprises a power adjusting circuit 7 and a power voltage reducing circuit 8, wherein the MCU control circuit 1 is connected with the power adjusting circuit 7, the power adjusting circuit 7 is connected with the power voltage reducing circuit 8, and the output end of the power voltage reducing circuit 8 is connected with the radio frequency driving circuit 3; when the handle 6 is not touched by a human body, the power adjusting circuit 7 controls the power within a small range (the power range of high power of less than 500K); when no human body contacts the handle 6, the MCU control circuit 1 adjusts the power step-down circuit 8 through the power adjustment circuit 7, so that the output power of the rf driving circuit 3 is increased to a predetermined power (500K high power).
The invention also comprises a sampling circuit 9, wherein the sampling circuit 9 acquires the output power of the radio frequency driving circuit 3 and feeds the output power back to the MCU control circuit 1, and if short circuit occurs, the MCU control circuit 1 controls the power voltage reduction circuit 8 to stop working through the power adjusting circuit 7.
The sampling circuit 9 of the present invention is a voltage sampling circuit 9 or a current sampling circuit 9. The invention further comprises a short-circuit protection circuit 10, wherein the short-circuit protection circuit 10 is connected with the sampling circuit 9.
As a preferred embodiment of the present invention, the present invention further includes a digital step-down circuit 11 and a power supply 12, wherein the power supply 12 respectively supplies power to the digital step-down circuit 11 and the power step-down circuit 8, and the digital step-down circuit 11 supplies power to the MCU control circuit 1.
The radio frequency driving circuit 3 outputs a radio frequency signal with high power of 500K.
The invention has the advantages that:
1. the automatic identification handle 6 contacts the human body, and is more intelligent.
2. The automatic energy is increased gradually, and the human body does not have over-excitation reaction. The MCU control circuit 1, the power adjusting circuit 7 and the power voltage reducing circuit 8 control the output power of the radio frequency driving circuit 3 to gradually rise to the set power.
3. Large acting area, high power and good effect.
4. The multi-path protection measures are safer to human bodies.
5. The digital-analog separation design is adopted, so that the anti-interference capability is strong; the power voltage reduction circuit 8 and the digital voltage reduction circuit 11 are arranged and designed separately, so that the anti-interference capability is strong;
6. real-time tracking and dynamic adjustment of power; the sampling circuit 9 performs real-time sampling and feedback to realize real-time tracking and dynamic adjustment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A high-power radio frequency circuit comprises an MCU control circuit, a signal isolation amplifying circuit and a radio frequency driving circuit, and is characterized in that: the human body contact recognition circuit, the power output matching circuit and the handle are also included; the MCU control circuit outputs signals to the signal isolation amplifying circuit, the signal isolation amplifying circuit outputs the amplified signals to the radio frequency driving circuit, the radio frequency driving circuit outputs high-power radio frequency signals, and the high-power radio frequency signals are output to the handle through the power output matching circuit and act on a human body; the human body contact identification circuit acquires a voltage signal fed back after a high-power radio-frequency signal acts on a human body, amplifies and filters the voltage signal, and outputs a stable voltage signal to the MCU control circuit.
2. The high power radio frequency circuit according to claim 1, wherein: the MCU control circuit is connected with the power adjusting circuit, the power adjusting circuit is connected with the power voltage reducing circuit, and the output end of the power voltage reducing circuit is connected with the radio frequency driving circuit; when the handle is not contacted by a human body, the power adjusting circuit controls the power within a smaller range; when no human body contacts the handle, the MCU control circuit can adjust the power voltage reduction circuit through the power adjustment circuit, so that the output power of the radio frequency driving circuit is increased to the set power.
3. The high power radio frequency circuit according to claim 2, wherein: the sampling circuit acquires the output power of the radio frequency driving circuit and feeds the output power back to the MCU control circuit, and if short circuit occurs, the MCU control circuit controls the power voltage reduction circuit to stop working through the power adjusting circuit.
4. The high power radio frequency circuit according to claim 3, wherein: the sampling circuit is a voltage sampling circuit or a current sampling circuit.
5. The high power radio frequency circuit according to claim 3, wherein: the sampling circuit is connected with the sampling circuit.
6. The high power radio frequency circuit according to claim 2, wherein: the MCU control circuit is characterized by further comprising a digital voltage reduction circuit and a power supply, wherein the power supply supplies power to the digital voltage reduction circuit and the power voltage reduction circuit respectively, and the digital voltage reduction circuit supplies power to the MCU control circuit.
7. The high power radio frequency circuit according to any of claims 1-6, wherein: the radio frequency driving circuit outputs a radio frequency signal with high power of 500K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512565.0A CN112087207A (en) | 2019-06-13 | 2019-06-13 | High-power radio frequency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512565.0A CN112087207A (en) | 2019-06-13 | 2019-06-13 | High-power radio frequency circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112087207A true CN112087207A (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910512565.0A Pending CN112087207A (en) | 2019-06-13 | 2019-06-13 | High-power radio frequency circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112087207A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065623A (en) * | 2010-10-21 | 2011-05-18 | 北京纳克分析仪器有限公司 | Full digital power adjustable inductance coupling plasma RF (Radio Frequency) light source |
| CN103151949A (en) * | 2013-03-18 | 2013-06-12 | 无锡南方声学工程有限公司 | Power supply of ultrasonic cleaning machine |
| CN203554262U (en) * | 2013-10-22 | 2014-04-16 | 北京吉兆源科技有限公司 | Low-power radio frequency power supply for beauty treatment |
| CN105792884A (en) * | 2014-04-17 | 2016-07-20 | 杰斯昂株式会社 | High-frequency thermotherapy device |
-
2019
- 2019-06-13 CN CN201910512565.0A patent/CN112087207A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065623A (en) * | 2010-10-21 | 2011-05-18 | 北京纳克分析仪器有限公司 | Full digital power adjustable inductance coupling plasma RF (Radio Frequency) light source |
| CN103151949A (en) * | 2013-03-18 | 2013-06-12 | 无锡南方声学工程有限公司 | Power supply of ultrasonic cleaning machine |
| CN203554262U (en) * | 2013-10-22 | 2014-04-16 | 北京吉兆源科技有限公司 | Low-power radio frequency power supply for beauty treatment |
| CN105792884A (en) * | 2014-04-17 | 2016-07-20 | 杰斯昂株式会社 | High-frequency thermotherapy device |
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