How To Identify The Radiation Protection Effect Of Maternity Dress?

Radiation protection during pregnancy is a problem that every expectant mother cares about. Maternity Dress It has become the necessary equipment for expectant mothers. How do you identify the radiation protection effect of maternity dress? Test the radiation protection clothing with the method of mobile phone. Shield Is the effect correct?

Radiation proof maternity dress really can. Radiation protection Do you?

Most consumers use mobile phones to test the radiation protection effect of radiation protection clothing, and each manufacturer does not guarantee that the cell phone is not signalling. Why does this happen?

From a consumer perspective, mobile phone testing is the most intuitive and the lowest cost test method. market The radiation protection products can also encase the phone in most cases without signal. The power of word of mouth makes most people believe that products that contain cell phone signals are better than those that cannot be wrapped up, but this is actually a misunderstanding. Many people think that since the electromagnetic shielding clothing is used to shield electromagnetic waves, it can shield the mobile phone signals, and the effect is poor. This view is not entirely correct.

Whether there is a signal to hold a cell phone and the location of the mobile phone, the frequency of the mobile phone in the network and the sensitivity of the cell phone itself are all very much related. Far from the cell phone base station and the frequency of mobile phone interference (CDMA interference level is less than GSM), the sensitivity of the mobile phone itself is low, the probability of encore the cell phone without signal is relatively large, otherwise the probability is small. In particular, the last point, the sensitivity of mobile phones, in theory, can be highly sensitive to mobile phones. With the development of technology, it can even be infinitely high. So long as a bit of signals can be received, new high-end mobile phones emerge in an endless stream, so no radiation protection manufacturer can guarantee that their products can be packaged without any signal in any case.

Secondly, the signals of mobile phones are good or bad. As far as we know, the reason why mobile phones can be located everywhere is that they can receive signals because they are equipped with signal converters on some tall buildings, so we can use mobile phones wherever they are. The signal is not good when the amplifier is far away.

Therefore, it is erroneous and unscientific to distinguish whether the shielding effectiveness of radiation protection is strong by using mobile phones to test whether or not to pass. Especially in some large shopping malls and OFFICE buildings, because of the structure of the buildings, all the mobile phone signals in them are very poor, so the mobile phone signal intensifier is installed on the top of the building, so in these large shopping malls, the test can not reflect whether there is really shielding effectiveness.

Consumers blindly pursue the anti radiation products with no signal from the mobile phones, and reverse some bad manufacturers. Some manufacturers will design special products for the design of radiation protection products, such as adding harmful elements to metal fibers in order to enhance the effect of shielding cell phone signals. At present, we know that some businesses use the coarse metal fibers with high chromium content to weave them into clothing. This radiation proof maternity dress can completely block cell phone signals, but this kind of radiation protection is not necessary. Maternity dress reduces the effectiveness of some other commonly used radiated electrical appliances, such as computers, televisions, and so on. In addition, there are also irregular weaving of metal fibers in textile technology. When irregular electromagnetic waves are encountered, new electromagnetic waves will interfere with the original electromagnetic waves, thus temporarily improving the interference degree of the working frequency of mobile phones. It is more difficult for the machine to receive signals, and actually more mobile phone signals are transformed into other cluttered radiation. Moreover, irregular weaving can easily relax the radiation resistant fabric and is not conducive to long-term radiation protection.

In addition, the electromagnetic wave has two kinds of radiation at the same time, which are near field and far field. It is mainly distinguished by the wavelength radius of electromagnetic wave, and the near field radiation is the most harmful to the human body. Take mobile phone as an example, the mobile phone itself sends out electromagnetic waves, and the mobile phone signal base station also emits electromagnetic waves at the same time, but the human body is basically "zero distance contact" with the cell phone, and receives the near field radiation, which is the most harmful. The distance between the human body and the mobile phone base station is generally over 20 meters, and the reception is only far field radiation. The radiation intensity accords with the national standard and basically does little harm to the human body. Shielding cell phone signals is shielding the far-field radiation emitted by mobile base stations.

Radiation protection clothing can effectively shield the near-field radiation, and also has a good shielding effect on far-field radiation. In some places, mobile phones can still be connected for several reasons:

1, mobile phones have the function of actively searching for signals, and different mobile phones have different abilities. In the same place, different cell phone tests may have different results.

2, the base station of your mobile phone is very close to where you are testing. The power density of the transmitting base station is very large, so there is still a faint signal being searched by mobile phone.

3, the power of base stations is different at different time periods.

4, some brands of mobile phones have large radiation and strong reception signals, and they may also search for signals under shielding. Therefore, some mobile phone manufacturers and communication companies emphasize low radiation, safety and environmental protection instead of pursuing the powerful receiving and transmitting function of mobile phones.

5, it is possible that there is a wrong way of experiment. There will be signal leakage in the small gap. When the bag is wrapped, it should be wrapped around the cell phone and wait for a while.

6, it is related to the direction of the mobile phone antenna and the base station when testing, and the probability of the antenna back to the base station is large.

7. If you are testing in the room, it is related to your location, and it will be more likely to wrap around the load-bearing wall, because the load-bearing wall is a reinforced concrete structure, which can play a certain role in shielding the external signals.

8, the signal indication on the mobile phone panel is actually controlled by software. The number of different cell phone signals represents different meanings, and the difference between the signal indication and the actual signal intensity of some mobile phones is relatively large.

Therefore, the complete or partial screening of mobile phone signals is a simple way to detect the effectiveness of the product, rather than whether the product is qualified. Because the mobile phone is a search signal, there are many interference factors. Only at the same time, the same location, the same direction, the same mobile phone, wrapped in the same time to get the test results are comparable. Shielding efficiency is less than 100% (100% fully shielded products are unable to make clothes), there is still a signal leakage, the phone may be connected. (