CN1072466C - Microwave protective cap - Google Patents
Microwave protective cap Download PDFInfo
- Publication number
- CN1072466C CN1072466C CN 96101598 CN96101598A CN1072466C CN 1072466 C CN1072466 C CN 1072466C CN 96101598 CN96101598 CN 96101598 CN 96101598 A CN96101598 A CN 96101598A CN 1072466 C CN1072466 C CN 1072466C
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- cap
- protective cap
- microwave
- microwave protective
- electromagnetic
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Abstract
The present invention relates to a microwave protective cap, namely a protective article for protecting the brains of wireless telephone users, workers in electromagnetic radiation equipment places and other people in serious electronic pollution areas from the harm by electromagnetic waves. The microwave protective cap is formed by the combination of a cap-shaped shielding cover made of highly conductive metal material which is 0.01mm to 0.9mm thick and a common cap, or singly formed by the cap-shaped shielding cover, can prevent the harm of electromagnetic waves in the frequency range of 0.1MHz to 300GHz, has the decorating and heat conservation effect of common caps and is especially suitable for protecting the brains of wireless telephone users.
Description
The present invention is a kind of microwave protective cap, and it can protect people's brain not injured by electromagnetic radiation.
The domestic and international at present wireless telephone that uses, transmission frequency belongs to microwave at 800MHZ to 1000MHZ, in electromagnetic wave spectrum.During work, vibration source is apart from user's brain 30MM to 80MM only, and microwave is directly to the brain radiation, and is near more apart from vibration source, and emittance is strong more, and is big more to the brain extent of injury.
Biological and the ecological referral centre in Berlin sounds a warning with regard to the wireless telephone that generally uses recently, and using wireless telephone is to pay great healthy cost.This center expert spells out, and the frequent call of daily communication can make the owner be subjected to the evil of electronic pollution deeply, as antimigraine, the appearance of symptoms such as confirmed fatigue, insomnia, bronchitis, asthma, with most of electronic installations, especially wireless telephonic improper use is relevant.Ecology man and medical expert also have abundant data to confirm simultaneously, and fixing electromagnetic wave emission often puts on the blood circulation of brain to the negative effect of human body, and endangers bigger to children and the elderly.For this reason, the German whole nation has nearly 200 social organizations to propose strong request to government at present, wishes to take practical safeguard measure, and Sweden scholar Tuo Meiniao finds that electromagnetic pollution is the area seriously, and the number of suffering from nervous system neoplasm rolls up.Technical evaluation place, Washington report according to U.S. authority claims that electromagnetic wave is harmful to human body cell.The biologist of Ruprecht-Karls-Universitat Heidelberg studies the electromagnetic wave of thinking even faint, also can sow the seed of cancer to people, and therefore z z z people will watch out for " smog of charged magnetic ".Because the electromagnetic wave penetration capacity is strong, it not only acts on the table body, and can bring disaster to deep tissues and organ, and often human body is not also felt body surface organization's pain, and deep tissues or organ sustain damage.Electromagnetic wave also helps the growth of cancer cell, and cancer morbidity is increased.In recent years, electromagnetic pollution has caused people's attention to the potential hazard that human body causes.Be used for industry at present, the radio-frequency apparatus of scientific experimentation and medical treatment, long-wave communication, medium wave broadcast, the emitting antenna of short wave communication and television broadcasting etc. all belongs to body electromagnetic radiation, surrounding environment is produced electromagnetic radiation, and do not have proper prophylactic methods.
The objective of the invention is for protect the wireless telephone user effectively, be operated in electromagenetic wave radiation equipment place personnel, other staff's brain of living in the serious area of electromagnetic pollution do not injure by electromagnetic radiation.
Microwave protective cap designs according to principle of electromagnetic shield-ing.
The demagnetizing effect of eddy current of inducting when electromagnetic screen utilizes alternating magnetic field by conducting material reaches the shielding purpose.Because of square being directly proportional of eddy current and frequency, so be suitable for protection to high frequency magnetic field.To high frequency magnetic field, the ferro-magnetic shield conductivity is low, and the demagnetizing effect effect of inductive loop is little, so when f＞1000Hz, just should replace ferro-magnetic shield with electromagnetic screen.
The object of the present invention is achieved like this: microwave protective cap is to be constituted by the hat metallic shield (hereinafter to be referred as radome) of high conductivity metal material and common cap, also can independently constitute.Radome adopts the high conductivity non-ferrous metal, touches to press according to hat-shaped (not containing bongrace or shade) and draws Deep forming, or directly make by hat-shaped, the top layer is silver-plated, the radome of making is made between common cap skin and liner, formed integral body, constitute microwave protective cap.Or adopt the high conductivity non-ferrous metal, and touch according to cap profile (containing bongrace or shade) and press the microwave protective cap that draws Deep forming, have the anti-electromagnetic radiation function equally.
Microwave protective cap is to utilize the alternating magnetic field that wireless telephone (or other body electromagnetic radiation) when work produce, and at the radome extexine opposite eddy current magnetism of inducting, removes to offset the electromagnetic wave of radiation in radome, reaches the purpose of protection user brain.
The microwave protective cap that radome and variety classes cap constitute except that having the microwave protection function, has still kept the anti-solar irradiation function of the warming and anti-dust of decoration of common cap.Microwave protective cap with compare with the kind common cap, weight slightly increases,
Radome generally adopts silver, copper, aluminium and alloy material thereof to make, and is silver-plated at extexine.Also can adopt on the top layer of hatting (as fiber, plastics and other hatting), compound respectively one deck silver, copper, aluminium and alloy material thereof are made.The thickness of radome or nonmetal hatting top layer composite metal thickness should be selected according to electromagnetic penetration depth and guard frequency scope.According to the electromagnetics principle, the electromagnetic wave of different frequency is had nothing in common with each other to the penetration depth of different conducting mediums.Calculate the formula of penetration depth and can look into relevant handbook.According to the penetration depth that formula is tried to achieve, be to stipulate on the engineering that electromagnetic amplitude fading is electromagnetic penetration depth to the distance of being walked of initial value at 36.79% o'clock.When selecting radome thickness for use, this point should note.In principle, the thickness of radome should be greater than electromagnetic penetration depth.Making microwave protective cap should be in conjunction with the manufacture craft and the material and the thickness that require to select radome of variety classes cap, and the thickness of radome must not be greater than 0.9mm.For protecting the electromagnetic radiation of same frequency range, the material conductivity height of selecting for use, respective thickness can reduce, the material conductivity of selecting for use is low, and respective thickness just increases, to the pliability microwave protective cap that has certain requirements, can adopt amount of deflection better, the material that conductivity is high is made radome.Microwave protective cap to there being definite shape to require can adopt conductivity low slightly, has certain thickness material to make radome, to guarantee hat-shaped.When radome with mould the system safety helmet constitute microwave protective cap the time, except that having anti-microwave function, increased mould the system safety helmet structural strength, increased safety coefficient.
Microwave protective cap can be according to the different frequency scope, adopts different metal material to make, and satisfies social different levels demand, protects user's brain not injured by microwave radiation effectively, and has kept the original function of common cap and simple in structure.
Be example now with the microwave protective cap of making carnival hat or big lip cap type, its manufacturing process of brief description.
1. calculate electromagnetic penetration depth according to formula.
2. according to electromagnetic penetration depth and requirement solid shape is arranged, select the Copper Foil making radome of thickness as calculated for use.
3. Copper Foil is touched by carnival hat or big lip cap profile (not containing shade or bongrace) and pressed that to draw Deep forming (touching tool and metal stamping process implementing by metal) extexine silver-plated.
4. the radome after silver-plated is placed between carnival hat or big lip cap skin and the liner fibrous material, be stitched into integral body, finish the production run of this model microwave protective cap by former hatting technology.
Claims (4)
1. a microwave protective cap is characterized in that it has a hat metallic shield, and this hat metallic shield places between common cap skin and the liner.
2. microwave protective cap according to claim 1 is characterized in that above-mentioned hat metallic shield is to be made by the non-ferrous metal paper tinsel of thickness≤0.9mm.
3. microwave protective cap according to claim 1 is characterized in that above-mentioned hat metallic shield, can adopt the material at the compound one deck non-ferrous metal in hatting top layer.
4. according to claim 1, described microwave protective cap, it is characterized in that above-mentioned hat metallic shield can independently use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96101598 CN1072466C (en) | 1996-04-10 | 1996-04-10 | Microwave protective cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96101598 CN1072466C (en) | 1996-04-10 | 1996-04-10 | Microwave protective cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1142927A CN1142927A (en) | 1997-02-19 |
| CN1072466C true CN1072466C (en) | 2001-10-10 |
Family
ID=5117142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96101598 Expired - Fee Related CN1072466C (en) | 1996-04-10 | 1996-04-10 | Microwave protective cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072466C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8001623B2 (en) * | 2005-05-26 | 2011-08-23 | Gertsch Jeffrey H | Electronic helmet |
-
1996
- 1996-04-10 CN CN 96101598 patent/CN1072466C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1142927A (en) | 1997-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |