CN2504789Y - Low frequency electromagnetic radiation eliminator - Google Patents
Low frequency electromagnetic radiation eliminator Download PDFInfo
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- CN2504789Y CN2504789Y CN 01260993 CN01260993U CN2504789Y CN 2504789 Y CN2504789 Y CN 2504789Y CN 01260993 CN01260993 CN 01260993 CN 01260993 U CN01260993 U CN 01260993U CN 2504789 Y CN2504789 Y CN 2504789Y
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- photoelectric cell
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Abstract
A low-frequency electromagnetic radiation canceller comprises a CPU, a power circuit connected with the CPU, a detection circuit, a display circuit and a control circuit. The detection circuit comprises a photoelectric cell, a comparator and an eliminating radiation channel both of which are connected with the photoelectric cell. The signal input end of the comparator is connected with the electrical signal output end of the photoelectric cell and the signal output end of the comparator is connected with CPU. One end of the radiating channel is connected with the photoelectric cell while the other end is connected with the live wire or zero line of the power. The control circuit comprises a relay connected with the collector circuit of the triode in series. A base pole is through an inarch foot of the CPU connected with the resistance. The display circuit comprises a two-color tube which is connected with two inarch feet of CPU. The eliminating radiation channel comprises a resistance and a capacitor that are connected in series. The electromagnetic radiation canceller can reduces the leakage currents between the live wire and the ground, ensuring service safety.
Description
(1) technical field:
The utility model relates to a kind of low frequency electromagnetic radiation arrester, particularly relates to the low frequency electromagnetic radiation arrester in a kind of supply socket that can be used for electric equipment products.
(2) background technology:
The general electric equipment products of using, computer particularly, after its energising, all can produce the low-frequency ac electromagnetic wave, promptly around it, produce electromagnetic radiation, and computer is a kind of electric equipment products that closely reach long-time use, the electromagnetic radiation that it produced and is contained from the low frequency radiation of 60Hz～2,000,000 Hz except that 60Hz, and the influence that human body is caused is the problem of extremely being concerned about for medical circle and scientific and technological personage, therefore, electromagnetic radiation how to eliminate electrical equipment effectively is a urgent problem.
At present, the mode of the electromagnetic radiation of elimination electrical equipment has following two kinds:
1, electric appliances plant adopts electromagnetic screen to exclude electromagnetic radiation, promptly by the electromagnetic screen of product inside, and the electromagnetic radiation that is produced when intercepting because of circuit working; If lack good grounding measures, then can't get a desired effect;
2, user one side, be to get rid of in the mode of casing proper grounding, be that the electromagnetic screen absorption of electromagnetic radiation is after the chassics earth eliminating, although computer manufacturers design is appropriate, and the user is because the restriction of objective condition, Chang Wufa fully cooperates (for example: use two traditional cellular type supply sockets), can't bring into play at all intrinsic should be powerful.Therefore, no matter whether active computer is equipped with electromagnetic screen, and whether the earthing device of computer itself brings into play its effectiveness, all directly influences the electromagnetic radiation from computer amount.The people of normal contact electric equipment knows that the power-line plug of electric equipment should have three pins, and it is respectively zero line, live wire and the chassics earth line of power supply.Chassics earth line wherein is used for electromagnetic shielding and prevents electric leakage.But in actual use, the chassics earth line often is left in the basket.
Main purpose of the present utility model is to provide a kind of low frequency electromagnetic radiation arrester of guaranteeing to eliminate electromagnetic radiation.
Of the present utility model time a purpose is to provide a kind of low frequency electromagnetic radiation arrester with warning function.
A purpose more of the present utility model is to provide a kind of low frequency electromagnetic radiation arrester safe in utilization.
For achieving the above object, the utility model is taked following technical measures:
In order to reduce live wire, in testing circuit, a resistance and an electric capacity on the radiation channel branch road that disappears, have been connected in series especially in the utility model to the leakage current between the ground;
In indicating circuit, adopt a two-colour tube to show that product is in normal and abnormal condition (as: normal, give a green light, improper, send out a warning), with raising demonstration effect.
The utility model is taked following concrete structure:
Low frequency electromagnetic radiation arrester of the present utility model comprises: central processing unit, the power circuit that is connected with central processing unit, testing circuit, display circuit and control circuit; Power circuit connects detected power supply, and it mainly comprises: rectification circuit, filter circuit and voltage stabilizing circuit;
Testing circuit mainly comprises a photoelectric cell, a comparator and the radiation channel that disappears of being connected with photoelectric cell respectively; The signal input part of comparator connects the electrical signal in the photoelectric cell, and the signal output part of comparator connects central processing unit; One end of radiation channel connects the light-emitting component in the photoelectric cell, and the other end connects the live wire or the zero line side of power supply;
Control circuit comprises a relay and a triode; The coil tandem of relay in the collector circuit of triode, the grounded emitter of triode, base stage connects an output connecting pin of central processing unit through resistance;
Display circuit comprises a two-colour tube that is used to show different detected states, and two-colour tube connects two pins of central processing unit, the common end grounding of two-colour tube respectively.
Wherein, the described radiation channel that disappears comprises a resistance and capacitor that is in series.
Wherein, described two-colour tube is made up of green and red diode.
Wherein, a pin of the luminous tube in the described photoelectric cell through resistance connect can reference the zero line electric potential contact.
Compared with prior art, the utlity model has following effect:
Low frequency electromagnetic radiation arrester of the present utility model can reduce live wire to the leakage current between the ground, can guarantee the low frequency electromagnetic radiation during eliminating electrical equipment uses, and this device is safe in utilization.
(4) description of drawings
Fig. 1: the stereogram of the utility model embodiment one;
Fig. 2: the stereogram of the utility model embodiment two;
Fig. 3 A, 3B: the stereogram and the upward view that are respectively the utility model embodiment three;
Fig. 4: the stereogram of the utility model embodiment four;
Fig. 5: the circuit block diagram of the utility model embodiment;
Fig. 6: the circuit diagram of the utility model embodiment.
(5) embodiment:
Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present utility model:
As shown in Figures 1 to 4, the embodiment one～four of its expression the utility model low frequency electromagnetic radiation arrester, low frequency electromagnetic radiation arrester of the present utility model comprises: loam cake 1, drain pan that can engage with loam cake 12, an indicator light 3 that is embedded on loam cake 1 surface; Be fixed with the power pin 4 that connects power supply and zero line electric potential contact 5 that can reference on the drain pan 2.Power pin 4 comprises that earth terminal 41, input 220V exchange live wire end 42 and zero line side 43; Be provided with circuit in loam cake 1 and the drain pan 2, above-mentioned indicator light 3, earth terminal 41, live wire end 42, zero line side 43 and zero line electric potential contact 5 are connected with circuit respectively.Be provided with green indicating lamp and red led in the indicator light 3, when live wire end 42 and zero line side 43 insert the 220V AC power respectively, the green indicating lamp flicker, testing circuit is started working, when judging that the wiring that is connected is live wire or zero line, if its correct judgment, indicator light 3 is green normal bright state, at this moment, reach the effect of Electric Apparatus Chassis ground connection; Through judging several times, in the time of can't detecting with zero potential that can reference, 3 of indicator lights present redness.
The power pin 4 of embodiment one and embodiment two all is fixed on the drain pan 2; The power pin 4 of embodiment three and embodiment four all is fixed on the plug 6, and plug 6 connects 7 through an electric wire and is connected on the drain pan 2; Be connected with zero line electric potential contact 5 on the drain pan 2 of embodiment one, four; Among the embodiment three, zero line electric potential contact 5 is located at the bottom surface (as Fig. 3 B) of drain pan 2.
Low frequency electromagnetic radiation arrester of the present utility model directly is plugged on the power pin 4 of low frequency electromagnetic radiation arrester in the supply socket that the charger product uses in use, can eliminate the low frequency electromagnetic radiation of electric equipment products.
As shown in Figure 5, it is the circuit block diagram of the utility model embodiment, and the circuit in the low frequency electromagnetic radiation arrester of the present utility model comprises: central processing unit 10, the power circuit 11 that is connected with central processing unit 10, testing circuit 12, indicating circuit 13 and control circuit 14; This circuit is by power ground and power filter principle, can rationally use power supply and guarantee the chassics earth of electric equipment products, is convenient to charger articles for use, computer and peripheral equipment and uses, and with the effect of performance ELECTROMAGNETIC RADIATION SHIELDING, reduces the electromagnetic radiation to the user.It is reference potential that this arrester adopts human body or zero line electric potential contact 5 that can reference; Testing circuit 12 in the application circuit is used for judging the live wire and the zero line of power line, when control circuit 14 work, reaction handles 10 for central authorities, after central processing unit 10 is determined zero lines, and makes the chassics earth point of zero line connecting circuit articles for use, computer, power line; When program was errorless, indicating circuit demonstrated normal or abnormal condition, so that the user understands the user mode of power supply.
As shown in Figure 6, it is the circuit diagram of the utility model embodiment, and wherein, power circuit 11 mainly comprises: rectification circuit 111, filter circuit 112, voltage stabilizing circuit 113.
When the 220V alternating voltage was connected, rectification circuit 111 rectifications that process is made up of diode D1～D4 were direct current, after filtration wave circuit 112 (being made up of electric capacity E1, C1) elimination peak values of ac wherein; The voltage stabilizing circuit of forming via transistor Q1, resistance R 16, voltage-stabiliser tube Z1 113 provides a stable 12V voltage again; 12V voltage offers relay U1; Another road makes its direct voltage that produces one group+5V through the input pin of resistance R 17 current limlitings to pressurizer T1, makes work voltage for central processing unit 10 and other peripheral circuit; Capacitor E2, C2 form filter circuit, and resistance R 1 is a discharge resistance.
The radiation channel 123 that disappears comprises a resistance R 18 and capacitor C8 who is in series, and an end of this series circuit connects photoelectric cell 121, and the other end connects the live wire or the zero line side of power supply.To reduce live wire to the leakage current between the ground.
When detecting, when the connecting line AC1 in the power circuit 11, AC2 energized (suppose that connecting line AC1 is a live wire, AC2 is a zero line), the pin PA2 of central processing unit 10 exports an oscillation level, makes the green light flicker in the indicating circuit 13; The pin PAO output low level of central processing unit 10, not adhesive of relay U1 this moment, then connecting line AC1 (live wire) is connected to 1 pin of the photoelectric cell 121 in the testing circuit 12 by relay U1; So; zero potential contact 123 ground connection that can reference; zero potential contact 123 connects 2 pins of photoelectric cell 121 by protective resistance R12; at this moment; 1 pin of photoelectric cell 121 is a live wire; 2 pins are zero line; light-emitting component in the photoelectric cell 121 is luminous; the output voltage rising of photoelectric cell 121 (voltage that is 3 pins of photoelectric cell 121 raises); when change in voltage is high to the voltage of voltage ratio 2 pins of 3 pins that make comparator 122; the 1 pin output high level of comparator 122; and being transferred to signal of pin Pb2 of central processing unit 10, when promptly showing the 1 pin output high level when comparator 122,1 pin of photoelectric cell 121 is a live wire; at this moment, central processing unit 10 promptly produces the judgement signal that 1 pin of a photoelectric cell 121 is a live wire.
When the high electricity of the pin PAO of central processing unit 10 output, triode Q2 conducting, relay U1 adhesive, wiring this moment AC2 is connected with 1 pin of photoelectric cell 121 by relay U1, then 2 pins of photoelectric cell 121 are zero potential contacts, 1 pin of photoelectric cell 121 and 2 pins can not form the loop so, then the light-emitting component in the photoelectric cell 121 is not luminous, 3 pin output low levels of comparator 122 so, at this moment, central processing unit 10 promptly produces the judgement signal that 1 pin of a photoelectric cell 121 is a zero line.When cycle detection was once errorless, the pin PA2 of central processing unit 10 exported high level (green light Chang Liang), shows that product is working properly; After determining zero line, can receive on the chassics earth point of electrical appliance, computer and peripheral electrical equipment, to reach the effect of the radiation that disappears.
When the cycle detection secondary did not all detect live wire, at this moment, the pin PA3 of central processing unit 10 exported a high level (red light Chang Liang), and expression work is undesired.
The pin 16 of central processing unit 10 is the R/C oscillator; Pin 14 is a power input, and capacitor C 3 is a power filtering capacitor, and RES is the pin that resets, and Pb0 is for detecting pin.
Claims (4)
1, a kind of low frequency electromagnetic radiation arrester comprises: central processing unit, the power circuit that is connected with central processing unit, testing circuit, display circuit and control circuit; Power circuit connects detected power supply, and it mainly comprises: rectification circuit, filter circuit and voltage stabilizing circuit;
It is characterized in that:
Testing circuit mainly comprises a photoelectric cell, a comparator and the radiation channel that disappears of being connected with photoelectric cell respectively; The signal input part of comparator connects the electrical signal in the photoelectric cell, and the signal output part of comparator connects central processing unit; One end of radiation channel connects the light-emitting component in the photoelectric cell, and the other end connects the live wire or the zero line side of power supply;
Control circuit comprises a relay and a triode; The coil tandem of relay in the collector circuit of triode, the grounded emitter of triode, base stage connects a pin of central processing unit through resistance;
Display circuit comprises a two-colour tube that is used to show different detected states, and two-colour tube connects two pins of central processing unit, the common end grounding of two-colour tube respectively.
2, low frequency electromagnetic radiation arrester according to claim 1 is characterized in that, the described radiation channel that disappears comprises a resistance and capacitor that is in series.
3, low frequency electromagnetic radiation arrester according to claim 1 is characterized in that, described two-colour tube is made up of green and red diode.
4, according to claim 1 or 2 or 3 described low frequency electromagnetic radiation arresters, it is characterized in that, a pin of the luminous tube in the described photoelectric cell through resistance connect can reference the zero line electric potential contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260993 CN2504789Y (en) | 2001-09-27 | 2001-09-27 | Low frequency electromagnetic radiation eliminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260993 CN2504789Y (en) | 2001-09-27 | 2001-09-27 | Low frequency electromagnetic radiation eliminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2504789Y true CN2504789Y (en) | 2002-08-07 |
Family
ID=33669032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01260993 Expired - Fee Related CN2504789Y (en) | 2001-09-27 | 2001-09-27 | Low frequency electromagnetic radiation eliminator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2504789Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818941A (en) * | 2012-08-08 | 2012-12-12 | 北京交通大学 | Electromagnetic radiation emission measurement method in outfield disturbed environment |
-
2001
- 2001-09-27 CN CN 01260993 patent/CN2504789Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818941A (en) * | 2012-08-08 | 2012-12-12 | 北京交通大学 | Electromagnetic radiation emission measurement method in outfield disturbed environment |
| CN102818941B (en) * | 2012-08-08 | 2015-06-24 | 北京交通大学 | Electromagnetic radiation emission measurement method in outfield disturbed environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |