CN102740519A - Radio-frequency heating method and radio-frequency heating device for biological thanosomes - Google Patents
Radio-frequency heating method and radio-frequency heating device for biological thanosomes Download PDFInfo
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- CN102740519A CN102740519A CN2012102305594A CN201210230559A CN102740519A CN 102740519 A CN102740519 A CN 102740519A CN 2012102305594 A CN2012102305594 A CN 2012102305594A CN 201210230559 A CN201210230559 A CN 201210230559A CN 102740519 A CN102740519 A CN 102740519A
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Abstract
The invention discloses a radio-frequency heating method and a radio-frequency heating device for biological thanosomes, and the method and the device are used for heating the biological thanosomes by using a radio frequency of 150-200 MHz. The device comprises a radio frequency source and a resonant cavity, wherein the resonant cavity is a closed cavity, the electromagnetic field distribution of the resonant cavity can be adjusted, the radio frequency source is arranged at one end of the resonant cavity, and a radiobiological thanosome is arranged in the radio-frequency resonant cavity. According to the invention, an effect of simultaneously heating inside and outside can be achieved better, the heating power is distributed more uniformly, and the comprehensive heating effect is better. According to the invention, the improvement of the thermal therapy effect is facilitated, and the safety of biological thanosome heating is improved.
Description
Technical field
The invention belongs to radiothermics, be specifically related to a kind of with radio frequency applications in biology thermotherapy and the technology of uniform heating treatment substantially.
Background technology
Microwave is the electromagnetic wave of frequency in the 300MHz-300GHz scope.The physical basis of microwave heating is that dielectric exists dielectric loss in electromagnetic field, and the energy that is consumed is deposited in the medium with the form of heat, microwave heating be a kind of directly and medium carry out the heating principle of NE BY ENERGY TRANSFER.Therefore, microwave heating is widely used in aspects such as industrial heat treated, food processing, medicinal material processing and medical treatment.The main frequency that adopts of microwave current heating is 915MHz and 2450MHz, and the mode of heating is through scattering multi-angle irradiation the material of the thermal treatment zone to be carried out integral body to heat.Compare with other mode of heating, the major advantage of microwave heating is that linked groups inner heating time is fast and heat flux distribution is even, and heating process is pollution-free, zero discharge, directly heats the accurate significant advantage such as controlled of high efficiency and heating power.But because microwave heating relates to problems such as transmission coupling and the power dissipation of microwave, therefore, microwave frequency is different, and is different to the heats of different materials.Microwave frequency is high more in general, and the degree of depth that can effectively penetrate biological organic material descends, and the loss efficient (absorptivity) of energy increases.Particularly there is resonant absorption effects in the microwave of 2450MHz to hydrone, and high to the efficiency of heating surface of hydrous matter, speed is fast.But along with the rising of microwave frequency, to the heating uniformity decline of large sized object, there is low ebb in the dissipation power in centre, and is as shown in Figure 1, is not suitable for the heat application of large sized object.And it is too low to work as microwave frequency, very big to the requirement of heating work area size on the one hand, otherwise microwave can't be propagated; On the other hand, material descends to the absorptivity of microwave, and the efficiency of heating surface and speed descend, and are not suitable for the heating of small-size materials.Integrate, the frequency range that field of microwave heating mainly adopts concentrates between 900MHz ~ 3GHz.
In recent years, biomedical to heat treatment, especially thermotherapy has produced keen interest.And the controllability and the fail safe of heating process there is high requirement based on the heat treated of biological living and thermotherapy; Biological heating substantially and thermotherapy are different from common industry heating and food heating; Biological thermotherapy substantially is that biological living integral body is heated, and heating process is had its distinctive requirement.At first being fail safe and side effect control, is to guarantee the safety of heating process to the primary problem of the heating of biological living, reduces the generation of side effect simultaneously as far as possible.This has just proposed very high requirement to mode of heating, mainly comprises: the power of heating process is accurately controlled, to the effective isolating and protecting etc. of key position.Next is biology to be heated position and heating power distributing homogeneity substantially want strict control.This power that just requires to heat can be effectively deeply biological inner substantially, also can form in specific zone as required to force the thermal region or the thermal treatment zone not, can also be to biology integral body evenly heating etc. from the inside to surface substantially.Be that firing equipment can not have energy to reveal at last, guarantee peripheral staff's safety.The heating means of traditional microwave are difficult to direct employing.The problem that exists comprises: 1, biological size substantially is generally in decimetre ~ rice magnitude, and microwave heating commonly used still is difficult to go deep into organism inside, is difficult to satisfy the heating uniformity requirement; 2, the traditional microwave mode that adds thermal recovery scattering chamber heats, distribution that can not reliable and stable on request control heating power; 3, microwave heating chamber can't perforate be protected organism part keypoint part, can not satisfy the requirement of high security.
Summary of the invention
In order to overcome the deficiency of prior art, the present invention provides a kind of biological radio frequency heating means substantially, improves biological uniformity, controllability and the fail safe of heating substantially.
The technical solution adopted for the present invention to solve the technical problems is: the employing frequency is that the radio frequency of 150MHz-200MHz heats biology substantially.
The described thermal recovery resonant cavity type that adds heats.
The present invention also provides a kind of device of realizing said method, comprises the radio frequency source resonant cavity, and resonant cavity is a closed cavity; Resonant cavity electromagnetic field distribution scalable; Radio frequency source is installed in resonant cavity one end, and RF source frequencies is 150MHz-200MHz, and biology places in the radio-frequency cavity substantially.
Described radio frequency source power output is 50W-2000W.
Described RF source frequencies is adjustable continuously; Power is adjustable continuously.
Described resonant cavity have a diameter at 15cm with interior through hole, through hole and radio frequency source are symmetrically distributed about resonant cavity volume center.
Described resonant cavity be the one side symmetrical cavity, have two diameters at 15cm with interior through hole, two through holes are symmetrically distributed about symmetrical plane, and radio frequency source is positioned at the symmetrical plane of resonant cavity.
The invention has the beneficial effects as follows: it is radio frequency heating human body or other animals cardinal principle of 150MHz-200MHz that the present invention proposes to adopt frequency, carries out biological RF thermotherapeutic or whole uniform heating treatment substantially.The radio frequency of 150MHz-200MHz to biology add thermal recovery substantially electromagnetic field to biology dielectric polarization counter-rotating vibration energy-absorbing mechanism substantially; Be with the difference of microwave heating; Radio frequency add pine for the hydrone resonant absorption effects very a little less than, Biomedia has brought advantages such as better penetration power and energy dissipation distribution more uniformly to the appropriate low absorptivity of this frequency range.This frequency range can reach more than the 10cm biologies such as ox, sheep and people effective transmission depth substantially, can realize better that the inside and outside heats simultaneously, and heating power is more evenly distributed, and comprehensive heats is more excellent, safer than microwave heatings such as 915MHz, 2450MHz.
The present invention adopts the 150MHz-200MHz radio frequency to heat, and mode of heating changes the resonant cavity type heating into.The wavelength of this wave band is 1.5m ~ 2m; Biological overall dimension substantially such as this wavelength and human body or other animal such as pig, ox, sheep is suitable; After adopting the sealing resonant cavity; Can form the stable even distribution of electromagnetic field, because animal substantially to the electromagnetic wave absorptivity appropriateness of this frequency range, makes electromagnetic wave energy have penetration power and the distribution of energy absorption dissipation more uniformly preferably; Make animal obtain from the inside to surface more uniform heating processing substantially, help improving thermotherapy effect and improve the biological fail safe of heating substantially.The resonant cavity yardstick of this wave band is suitable simultaneously, and Project Realization is more economical feasible, and the hole of also being convenient to out suitable size is monitored and protected organism key position (like head), and can not cause the leakage of RF energy.
Description of drawings
Fig. 1 is that microwave and radio frequency transmission power distribute and the material thickness graph of a relation;
Fig. 2 is with 180MHz radio frequency transient field distribution map in the resonant cavity of equivalent manikin;
Among the figure, 1-radio-frequency cavity, 2-human body, 3-rf electric field;
Fig. 3 (a) is radio frequency heating cavity resonator structure figure, and Fig. 3 (b) is radio frequency heating cavity resonator structure figure,
Among the figure, 4-radio-frequency transmission line L40 waveguide, 5-radio-frequency antenna, 6-travel(l)ing rest, 7-shield door; 8-cylinder radio-frequency cavity inspection hole, 9-radio frequency electromagnetic, 10-shield door gap, 11-resonant cavity supporter; 12-resonant cavity scroll wheel, 13-shield door handrail, 14-electromagnetic shield door, the perforate of 15-cylinder resonator; 16-biological head support substantially, 17-resonant cavity supports, 18-cylinder resonator diameter, 19-cylinder resonator opening diameter.
Embodiment
The present invention includes following content:
(1) heating radio frequency source frequency range is 150MHz-200MHz, and RF source frequencies is adjustable.Under the different heating loading condition, the adjustable radio-frequency source frequency satisfies the resonance heating requirements; (2) adopt the resonant cavity type mode of heating, the scalable controlling filed distributes.Human body or other animal place in the radio-frequency cavity substantially, and the distribution that can regulate radiofrequency field improves animal substantially to the absorption of radio frequency.Can hold diameter can not cause RF energy to be revealed at 15cm with interior hole yet as other purpose.(3) heating radio frequency source power is 50W-2000W, continuous wave, adjustable power.Regulate the radio frequency source power output, may command firing rate and heating time;
Adopt the heating of 150MHz-200MHz radio frequency; Mainly be because the wavelength of this wave band is 1.5m ~ 2m; Biological overall dimension substantially such as this wavelength and human body or other animal such as pig, ox, sheep is suitable; Because thereby resonance effects can form the even distribution of electromagnetic field and effectively penetrate, because animal substantially to the electromagnetic wave absorptivity appropriateness of this frequency range, makes electromagnetic wave energy have penetration power and the distribution of energy absorption dissipation more uniformly preferably; Make biology obtain from the inside to surface more uniform heating processing substantially, help improving thermotherapy effect and improve the biological fail safe of heating substantially.In addition, biological individual shapes and weight differential substantially, there is drift phenomenon in operating frequency during heating.Therefore, adopt the heating of 150MHz-200MHz radio frequency source, RF source frequencies is adjustable, can satisfy different biological resonance demand of heating substantially.The adjusting step-length of radio frequency source operating frequency is 0.25MHz.
Adopting the resonant cavity type mode of heating, mainly is that electromagnetic field distributes in the control resonant cavity in order to regulate, and satisfies different biological heating requirements substantially.The resonant cavity size of 150MHz-200MHz is suitable with biological cardinal principle size, and the chamber energy distribution was more even when biology was heated substantially, and the intra space obtains rationally fully using.Simultaneously, resonant cavity takes up space less, helps the commercialization of Medical Devices.At last, the hole that the 150MHz-200MHz resonant cavity is convenient to out suitable size is observed organism key position (like head) and is protected, and can not cause the leakage of RF energy, helps shielding the localised protection of electromagnetic pollution and biological sensitive part substantially etc.Cavity resonator structure adopts cylinder resonator, cylinder resonator length 1750mm, cylinder resonator diameter 1100mm, cylinder resonator bore size 300mm and 150mm.
Adopting radio frequency source power is 50W-2000W, continuous wave, and adjustable power, satisfies different biological heating requirements substantially at major control firing rate and heating time.During heating biology cardinal principle, power is excessive, can cause biological surface substantially to be burnt; Power is too small, has satisfied not the demand for heat of biological cardinal principle.The adjusting step-length of radio frequency source power output is 20W.Substantially in the reaction of heating process, real-time regulated radio frequency source power output satisfies heating safety and validity requirement according to biology.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
⑴ RF source frequencies is 150MHz-200MHz, and frequency is adjustable continuously.Under the biological general shape and the situation that varies in weight, adjustable radio-frequency source output frequency satisfies the resonance requirement.
⑵ adopt the resonant cavity type mode of heating, and the scalable controlling filed distributes.Human body or other animal place in the radio-frequency cavity substantially, and the distribution that can regulate radiofrequency field improves animal substantially to the absorption of radio frequency.Can hold diameter can not cause RF energy to be revealed at 15cm with interior hole yet as other purpose.
⑶ radio frequency source power output is 50W-2000W, and continuous wave, power are adjustable continuously.Regulate the radio frequency source power output, may command firing rate and heating time.
Here provide the simulation result of absorption of human body 180MHz radio frequency, as shown in Figure 2, represent that a certain moment radio frequency distributes at the resonant cavity internal electric field that has the human body load.Simulation result shows: the 150MHz-200MHz radio field intensity distributes more even relatively, is easy to whole evenly heating.
Among Fig. 3 (a), radio-frequency antenna adopts the monopole antenna structure, can efficiently encourage electromagnetic wave, does not take the resonant cavity space again.Among Fig. 3 (a), the free adjustable shelf that has the dielectric material to make in the cylinder resonator is convenient to fixed biologically substantially.Among Fig. 3 (a), it is the 100mm inspection hole that cylinder resonator is opened two diameters, is convenient to observe biological reaction in heating process substantially, and perforate adopts transparent electromagnetic shielding cloth to cover, and the assurance radio frequency electromagnetic is not revealed.Among Fig. 3 (b), the resonant cavity opening diameter is 300mm, and the main purpose of perforate is the biological head substantially of protection, makes it not receive the radio frequency electromagnetic irradiated heat.Among Fig. 3 (b), around perforate, adopt electromagnetic shielding cloth to make the electromagnetic shielding sheath, its function is to prevent the electromagnetic wave leakage.
Innovative point of the present invention is:
⑴ adopt 150MHz-200MHz radio frequency heating new method, and the radio frequency electromagnetic transmission depth is dark, heating simultaneously inside and outside the calandria.
⑵ adopt radio-frequency cavity to heat new mode, and the electromagnetic field field strength distribution is controlled, and is also more even, and the heating chamber size to fit is suitable for biological whole substantially evenly heating.
⑶ adopt the heating of 150MHz-200MHz radio-frequency cavity, and localized electromagnetic field is easier to shielding, and the window of also can folding fitting is used for sensitive parts such as protection head, hand, more helps guaranteeing the fail safe of biological cardinal principle in the heating process.
⑷ radio frequency resonant heating chamber structure is with biological size is suitable substantially, and compact conformation is easy to the through engineering approaches of firing equipment, is easy to promote the use of Medical Devices and other radio frequency firing equipment.
Claims (7)
1. biological radio frequency heating means substantially is characterized in that: adopting frequency is that the radio frequency of 150MHz-200MHz heats biology substantially.
2. biological radio frequency heating means substantially according to claim 1 is characterized in that: the described thermal recovery resonant cavity type that adds heats.
3. biological radio frequency heating apparatus substantially of realizing the said method of claim 1; Comprise the radio frequency source resonant cavity; It is characterized in that: resonant cavity is a closed cavity, resonant cavity electromagnetic field distribution scalable, and radio frequency source is installed in resonant cavity one end; RF source frequencies is 150MHz-200MHz, and biology places in the radio-frequency cavity substantially.
4. biological radio frequency heating apparatus substantially according to claim 3, it is characterized in that: described radio frequency source power output is 50W-2000W.
5. biological radio frequency heating apparatus substantially according to claim 3, it is characterized in that: described RF source frequencies is adjustable continuously; Power is adjustable continuously.
6. biological radio frequency heating apparatus substantially according to claim 3 is characterized in that: described resonant cavity have a diameter at 15cm with interior through hole, through hole and radio frequency source are symmetrically distributed about resonant cavity volume center.
7. biological radio frequency heating apparatus substantially according to claim 3; It is characterized in that: described resonant cavity is the symmetrical cavity of one side; Have two diameters at 15cm with interior through hole, two through holes are symmetrically distributed about symmetrical plane, and radio frequency source is positioned at the symmetrical plane of resonant cavity.
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| CN2012102305594A CN102740519A (en) | 2012-07-05 | 2012-07-05 | Radio-frequency heating method and radio-frequency heating device for biological thanosomes |
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| CN2012102305594A CN102740519A (en) | 2012-07-05 | 2012-07-05 | Radio-frequency heating method and radio-frequency heating device for biological thanosomes |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486856A (en) * | 2014-12-15 | 2015-04-01 | 西北核技术研究所 | Feeding frequency stabilization structure for biological thanosome radio frequency heating device |
| CN108702817A (en) * | 2016-02-15 | 2018-10-23 | 松下电器产业株式会社 | Method and apparatus for transmitting radio frequency electromagnetic energy to be cooked to foodstuff |
| CN113891512A (en) * | 2021-08-26 | 2022-01-04 | 电子科技大学长三角研究院(湖州) | Radio frequency heating method based on frequency selection technology |
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| US5163446A (en) * | 1989-02-16 | 1992-11-17 | Omron Corporation | Electromagnetic heating device |
| US20020047009A1 (en) * | 1998-04-21 | 2002-04-25 | The State Of Or Acting By And Through The State Board Of Higher Edu. On Behalf Of Or State Univ. | Variable frequency automated capacitive radio frequency (RF) dielectric heating system |
| CN101226119A (en) * | 2008-01-30 | 2008-07-23 | 吉林大学 | Dynamic loop microwave auxiliary clear-up device |
| CN202679682U (en) * | 2012-07-05 | 2013-01-16 | 西北核技术研究所 | Radio frequency heating apparatus for large living organism |
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2012
- 2012-07-05 CN CN2012102305594A patent/CN102740519A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5163446A (en) * | 1989-02-16 | 1992-11-17 | Omron Corporation | Electromagnetic heating device |
| US20020047009A1 (en) * | 1998-04-21 | 2002-04-25 | The State Of Or Acting By And Through The State Board Of Higher Edu. On Behalf Of Or State Univ. | Variable frequency automated capacitive radio frequency (RF) dielectric heating system |
| CN101226119A (en) * | 2008-01-30 | 2008-07-23 | 吉林大学 | Dynamic loop microwave auxiliary clear-up device |
| CN202679682U (en) * | 2012-07-05 | 2013-01-16 | 西北核技术研究所 | Radio frequency heating apparatus for large living organism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486856A (en) * | 2014-12-15 | 2015-04-01 | 西北核技术研究所 | Feeding frequency stabilization structure for biological thanosome radio frequency heating device |
| CN104486856B (en) * | 2014-12-15 | 2016-03-02 | 西北核技术研究所 | A kind of biological frequency stabilization of radio frequency heating apparatus feed substantially structure |
| CN108702817A (en) * | 2016-02-15 | 2018-10-23 | 松下电器产业株式会社 | Method and apparatus for transmitting radio frequency electromagnetic energy to be cooked to foodstuff |
| CN113891512A (en) * | 2021-08-26 | 2022-01-04 | 电子科技大学长三角研究院(湖州) | Radio frequency heating method based on frequency selection technology |
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Application publication date: 20121017 |