CN110632398A

CN110632398A - Electromagnetic radiation leakage detection coil

Info

Publication number: CN110632398A
Application number: CN201910874451.0A
Authority: CN
Inventors: 廖培语
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2019-12-31

Abstract

The invention discloses an electromagnetic radiation leakage detection coil, which comprises 1 coil unit made of enameled wires, 1 light-emitting diode unit and 1 standby high-frequency millivoltmeter or microvolt meter. The electromagnetic radiation leakage detection coil and the light emitting diode are connected in series to form a closed circuit. According to the Faraday electromagnetic induction principle, the closed circuit can generate induction current under the action of an electromagnetic field, and the induction current causes the light emitting diode to emit light to display the existence of the electromagnetic field. When electromagnetic radiation leakage of a certain household appliance is detected and leakage data needs to be read, standby high-frequency millivoltmeter or microvolt meters can be connected in parallel to two pins of the light-emitting diode. The invention can detect the electromagnetic radiation leakage condition without configuring a power supply, and makes up the defect that all the electromagnetic radiation leakage detection devices can detect only by configuring the power supply at present. The invention can also be applied to self-detection of electromagnetic compatibility in the production process of electronic equipment.

Description

Electromagnetic radiation leakage detection coil

Technical Field

The present invention relates to a detection coil for indicating the presence of electromagnetic radiation, in particular to a detection coil capable of identifying the safety and dangerous leakage of electromagnetic radiation of household appliances.

Background

The knowledge of the electromagnetic radiation is the technical basis of the invention

The Liao culture language is a student in Shenzhen science, high school and first grade, and learns the relevant knowledge of electromagnetic radiation in a physical course:

1 is knowledge of electromagnetic induction and induced current. It is known that oersted in denmark discovered the current magnetic effect of "electromagnetism generation" in 1820 and revealed that the electric phenomenon is linked to the magnetic phenomenon, and the electromagnetic induction phenomenon of "magnetism generation" in 1831 and 8 months in british faraday revealed that magnetism generation is an effect which can only occur during the course of movement, and summarizes their five types of states linked to changes and movement: a varying current, a varying magnetic field, a moving constant current, a moving magnet, a conductor moving in a magnetic field. These phenomena are termed electromagnetic induction and the resulting current is called induced current.

The discovery of electromagnetic induction, one of the most important discoveries in electromagnetism, reveals the interrelationship between electric and magnetic phenomena. The faraday's law of electromagnetic induction is of great significance in that, on the one hand, people create generators based on the principle of electromagnetic induction, which is the basis for the manufacture of generators, motors, transformers and most other electrical equipment, and large-scale production and long-distance transmission of electrical energy is possible. (ii) a On the other hand, the electromagnetic induction phenomenon is widely used in electrical technology, electronic technology, electromagnetic measurement, etc., and various household appliances such as electric fans, refrigerators, induction cookers, electric cookers, air conditioners, microwave ovens, etc. are manufactured by using the electromagnetic induction phenomenon to meet and improve the needs of people's lives.

2 is the relevant knowledge about electromagnetic waves. Understanding the results of scientists in coulombs, amperes, oersteds, farads, henries and the like in the middle of the 19 th century summarized the results of electromagnetic laws in humans, creatively established the classical electromagnetic field theory, whose fundamental arguments are that a changing magnetic field generates an electric field and a changing electric field generates a magnetic field. Therefore, a periodically changing electric field in a certain region of the space will induce a periodically changing magnetic field in the space, and this changing magnetic field will induce a new changing electric field, so that the changing electric field and the changing magnetic field are alternately generated and propagate from near to far to the surroundings, which is an electromagnetic radiation phenomenon, also called electromagnetic wave. Later on, as proved by further experiments in hertz in germany.

It is clear that the varying electromagnetic field propagates in space in the form of electromagnetic waves. To generate a continuous electromagnetic radiation, a varying electromagnetic field is required. To generate a varying electromagnetic field, a varying current is required. The most common LC oscillation circuit is studied, and the electromagnetic wave is a family with a wide frequency range, and the radio wave, the microwave, the infrared ray, the visible light, the ultraviolet ray, the X ray and the r ray with the frequencies from low to high are all electromagnetic waves, the higher the frequency is, the shorter the wavelength is, the wavelet-particle duality is realized, the wavelength is in inverse proportion to the photon energy, and the shorter the wavelength is, the higher the photon energy is, the stronger the penetrating power is. According to the characteristics of electromagnetic waves, human beings widely apply technologies related to the electromagnetic waves in various fields such as national defense and military, aerospace and navigation, industrial traffic, communication and navigation, agriculture, forestry, animal husbandry, medical sanitation, cultural education, daily life and the like. For example, the household appliance full of Linglan brings great convenience to human life. It can be said that humans have been in the history of nearly 200 years from the recognition of electromagnetic waves to the application of electromagnetic wave technology. At present, people live in an electrified era, an information-oriented society and various electromagnetic wave environments.

And 3, the influence of electromagnetic waves on human health. With the continuous deepening of the knowledge of the electromagnetic waves, the human body continuously applies the related technology of the electromagnetic waves and simultaneously continuously knows the harm of the electromagnetic waves to the human health:

the mechanism of the electromagnetic wave harming the human body is mainly the cumulative effect of the thermal effect and the non-thermal effect. As we know, more than 70% of water is in human body, and water molecules are subjected to electromagnetic wave radiation and then rub with each other to cause the heating effect of the body or destroy the normal work of each organ of the body, which is the thermal effect harm; it is also known that each organ and tissue of the human body have weak electromagnetic fields, which are related and stably ordered, once the external electromagnetic wave interference is met, the related stable ordered state can be destroyed, and the normal circulation function of the human body can be damaged, which is a non-thermal effect hazard; after the thermal effect and the non-thermal effect damage the human body, the human body is damaged by the electromagnetic wave radiation again before the human body has self-repair, the damage degree can be accumulated, and the human body can become a permanent ill condition to endanger life after a long time.

Household appliances such as televisions, refrigerators, computers, induction cookers, microwave ovens, electric blankets, electric cookers, air conditioners, and the like, which people use in daily life, are many. If a household appliance with electromagnetic radiation leakage is used, the long-term electromagnetic radiation can cause the occurrence of various cancers such as human immunity reduction, metabolism disorder, hypomnesis, arrhythmia, visual deterioration, abnormal blood pressure, pachylosis, speckle and pox, premature senility, reproductive capacity reduction, menstrual disorder of women, fetal distortion, abortion, and the like. For this reason, increasingly important attention has been paid to the detection and protection of electromagnetic wave radiation from household appliances.

Therefore, equipment and instruments for detecting electromagnetic wave leakage are produced, the equipment and instruments are special for household appliance manufacturers, special for maintenance departments, strong in specialty and specific frequency band detection of products, the structure of the equipment and instruments is generally complex, and the equipment and instruments also have detectors with simpler structures or particularly small sizes. At present, no device which is simpler and can detect the leakage of electromagnetic radiation without providing a power supply is available, and passive detection is realized.

Disclosure of Invention

The invention aims to provide a passive electromagnetic radiation leakage detection coil which can supplement the defects of the existing electromagnetic radiation detection equipment, is convenient for people to detect whether electromagnetic radiation leakage? exists or not when the household appliances are purchased, does not buy the appliances, and is also convenient for people to detect whether electromagnetic radiation leakage? exists or not regularly for various appliances at home so as to avoid the harm of electromagnetic radiation to human bodies.

The technical scheme for solving the problems is as follows:

the enameled wire coil is connected in series with the light emitting diode to form a closed circuit. According to the Faraday electromagnetic induction principle, the closed circuit can generate induction current under the action of an electromagnetic field, and the induction current causes the light emitting diode to emit light to display the existence of electromagnetic radiation.

I use the enameled wire that the line diameter is 0.3mm (0.1 ~ 0.5mm all can) to wind 1 diameter 50mm totally 1000 coils, concatenate with 1 square LED of formula 255 that cut straightly (green glow, luminous voltage 1.8 ~ 2.4V, electric current 2-20mA) and form closed circuit, the junction is wrapped with the electric tape (only expose 2 and connect in order conveniently and connect 1 microvolt table or microvolt table and show electromagnetic radiation leakage data), 1 passive electromagnetic radiation leaks the detection coil, fix this coil on 1 insulating handle in order to make things convenient for the operation.

The coil is close to the up, down, front, back, left and right positions of various household appliances which are working, the angle of the coil is changed (an electromagnetic field is allowed to be perpendicular to the coil), and particularly, the coil is close to the front of the appliances (namely, the operation position of a person) to detect, if a light-emitting diode emits light when a certain appliance is detected, the appliance leaks electromagnetic radiation, about 1.8V voltage is induced by the 1000-coil to flow 2mA current, the voltage induced by the 1-coil is converted into 1.8mV0.002mA, and if 1 millivolt meter is connected in parallel, the voltage value can be directly read out at the two ends of the coil. When the coil is slowly separated from the electric appliance until the light-emitting diode is extinguished, the voltage induced by the coil 1 is lower than 1.8mV, the distance is the distance with weak electromagnetic radiation, and the electric appliance cannot be damaged by the electromagnetic radiation when people stand more than the distance.

Note that when detecting a microwave oven, since the operating frequency of the microwave oven is very high, about 2.4Ghz, as long as there is a little radiation leakage, a high voltage is induced in the 1000-turn coil, and the light emitting diode emits a very bright green light and even burns out immediately. Therefore, the coil is close to the microwave oven from far to near, and the light-emitting diode is not lighted until the coil is close to the microwave oven, which indicates that the microwave oven has no electromagnetic radiation leakage. During detection, no matter the distance between the coil and the microwave oven, the microwave oven cannot be used until the microwave oven is repaired as long as the light emitting diode emits light, which indicates that the microwave oven has electromagnetic radiation leakage. The working frequency of the induction cooker is low, about 25Khz, and during detection, the safety distance is the distance that the light-emitting diode does not emit light, the working frequency of other electrical appliances is lower, and the safety distance is the distance that the light-emitting diode does not emit light.

The following is explained: the light emitting diode is generally operated in a direct current circuit, the electromagnetic radiation leakage detected by the electromagnetic radiation leakage detection coil of the invention induces alternating voltage and current, and the light emitting diode emits light in a one-way conduction mode in the alternating circuit, and the light emitting diode does not flicker when the frequency is higher than 50 Hz.

Drawings

Fig. 1 is a block diagram of the structure of the present invention.

Fig. 2 is a circuit schematic of the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

FIG. 1 is a block diagram showing the structure of the present invention. As can be seen from the figure, the present invention is mainly composed of three devices: one is coil, the other is LED, and the other is millivoltmeter or microvolt meter. The millivoltmeter or the microvolt meter can be connected in parallel at two pins of the light-emitting diode according to requirements to read data of electromagnetic radiation leakage.

Fig. 2 is a schematic circuit diagram of the present invention. As can be seen from the figure, the passive circuit is formed by winding 1 coil with the diameter of 50mm and 1000 circles around an enameled wire with the wire diameter of 0.3mm and connecting 1 light-emitting diode in series. The millivoltmeter or the microvolt can be connected in parallel at two pins of the light-emitting diode according to requirements to read data of electromagnetic radiation leakage, and can also be connected with the ammeter in parallel to observe the light-emitting condition of the light-emitting diode.

Claims

1. The utility model provides an electromagnetic radiation leaks detection coil, it includes 1 coil unit and 1 emitting diode unit of using the enameled wire preparation, 1 high frequency millivolt table or high frequency microvolt table are for standby, its characterized in that still includes:

a coil unit: the coil diameter is 50mm, and the coil is formed by winding 1000 turns of ordinary enameled wires (the wire diameter is 0.3 mm). The loops are fastened by sewing thread at intervals, and 2 thread ends are fastened by sewing thread and the loops.

A light emitting diode unit: the light emitting diode with low working voltage is selected. The visible light direct-insertion type 255 square LED light-emitting diode produced by Donggong optoelectronic technology limited in Dongguan is selected to emit green light, the light-emitting voltage is 1.8-2.4V, and the current is 2-20 mA.

2 ends of the coil are connected with the light-emitting diode in parallel, the joint is wrapped by the electric adhesive tape (2 connectors are exposed to facilitate the access of a voltmeter), so that the coil of the 1 electromagnetic radiation leakage detection device is formed, and the device is fixed on the 1 insulated handle to facilitate the operation.

If electromagnetic radiation leakage of a certain household appliance is detected, when leakage data needs to be read, standby high-frequency millivoltmeter or high-frequency microvolt meters can be connected to two pins of the light-emitting diode for detection.