Recently, live in Xi'an city too yuan the newspaper of business of Xiang Hua of gentleman of the Kingdom of Wei of area of China city A mirrors Lu Huilin, he is lived in carrying a layer on the head, discovered building top built station of a communication radical 2017, among them an emissive antenna looks very clearly in his home, the space is only 78 meters. Come one year, family often has the case such as dazed, lose one's hair, worry and the electromagnetism radiate that communication radical stands is concerned.
The Shaanxi that China business signed up for a reporter to contact Shaanxi to save subordinate of zoology environment hall saves radiation environment to supervise control stand. On March 25, many staff member that visits radiation environment to supervise control stand undertook to home of gentleman of the Kingdom of Wei the spot checks together. Concrete result how? Will quickly look.
[test time]
On March 25, 2019, 27 days
[test personnel]
Shaanxi saves radiation environment to supervise Zhang Chao of personnel of control stand technology
[test equipment]
Electromagnetism field is strong integrated instrument
[the spot is advisory]
Supervisory control stand of environment of Shaanxi province radiate always is versed in Li Jianwei, Shaanxi saves radiation environment to supervise Lin Gongjun of director of room of control stand monitoring
>> experiment 1
Outside the window to base station antenna
Electromagnetism radiate test is far under be restricted to be worth
Home of gentleman of the Kingdom of Wei is double entry building, 11 fluctuation is whole building two respectively mix 12, 12 building top is above the layer. The balcony that from him a 12 buildings and bedroom are linked together looks outwards, base station emissive antenna carries one horn on the head in the building, but this antenna is used bat was wrapped rise.
"Our family sleeps on the bed to be able to see base station. This year is much, family often has the case such as dazed, lose one's hair. Because concern is mixed,the electromagnetism radiate that communication radical stands is concerned, I used plastic bat to wrap aerial. " gentleman of the Kingdom of Wei says, to the distance of emissive antenna from balcony window he has been measured, it is 8.3 meters.
Zhang Chao of personnel of technology of supervisory control stand of province radiate environment asks gentleman of the Kingdom of Wei to open the balcony to defend after the net, check to the window in the balcony. Numerical value of strong integrated instrument shows electromagnetism field: Numerical value of intensity of integrated electric field is in 0.02~2.44 bend over / between rice, measure twice so that average is 1.78 bend over respectively / rice, 1.5 bend over / rice. The mobile telephone is dialed on the balcony, touch instrument probe close mobile phone is measured, the instrument shows numerical value of the biggest moment is 4.01 bend over / rice. Shut glazing to be measured again, numeric change is not big. But pull a curtain to be measured again, average falls at a draught for 0.29 bend over / rice, measure again, average also only 0.47 bend over / rice. Gentleman of the Kingdom of Wei says, because worry about electromagnetism radiate, he ordered radiation-proof curtain technically.
Later, technical personnel has a test to the bedroom that connecting the balcony, stand in the bed end position that can see antenna of Louding radical station directly to check, average numerical value is 1.01 bend over / rice; Check for many times in the position of the head of a bed that relies on a wall, average numerical value is 0.21 bend over respectively / rice, 0.24 bend over / rice, 0.35 bend over / rice, 0.34 bend over / rice, 0.24 bend over / rice; In this bedroom check near the doorway to stair, average numerical value is 0.21 bend over / rice, all not was restricted to be worth 12 bend over more than / rice.
So, check near the antenna that carries communication radical station on the head in the building, is the circumstance met how? Technical personnel will to the building carry a distance on the head to launch the aerial side that aerial handles 3 meters, the average numerical value that checks twice is 3.31 bend over respectively / rice, 4.77 bend over / rice. Gentleman of the Kingdom of Wei tears open stealthily substitute one thing for another the plank of antenna of move radical station, technical personnel has a test again, discover numeric change is not big.
Gentleman of the Kingdom of Wei says, install communication radical in Lou Dingan at the outset owner opinion was not sought when the station, installed directly. He hopes Xi'an city can correspond base station installation publishs a technical measure, case of radiate of communication radical station is signalled before installation, the installation that with the standard communication radical stands.
>> the expert dispels misgivings
Should not exceed 12 bend over only / rice is affected to health not quite
Province radiate environment supervises control stand to always be versed in Li Jianwei introduces, 4 units use the measurement that describes planar electromagnetic wave: Electric field intensity, magnetic field intensity, magnetic induction intensity and density of power of equivalent and planar wave. The electromagnetic wave that communication radical station emits belongs to planar electromagnetic wave, when the transmission in air, electric field and magnetic field heft show fixed scale to concern, should measure only piece among them a value, can change cipher out other value, measure electric field intensity only commonly so enough.
According to national level " electromagnetism environment control is restricted to be worth " in to " the public exposeds to the open air control is restricted to be worth " regulation, it is the electromagnetic wave of 30MHz~3000MHz in the light of frequency limits, the limitation of electric field intensity does not exceed 12 bend over / rice. Communication radical station is inside this frequency limits. From the point of metrical numerical value, home of gentleman of the Kingdom of Wei is upstairs base stand and not was restricted to be worth more than, so, gentleman of the Kingdom of Wei does not have necessary and beyond the mark afraid radiant to harm.
Get different numerical value to checking everywhere in home of gentleman of the Kingdom of Wei, li Jianwei expresses, the way that the distance of source of signal of distance of site of the size of emissive intensity of electromagnetism radiant intensity and signal source, test, electromagnetic wave spreads and transmission process have 4 factors such as screen measure the concern is very big. Radiation-proof curtain can prevent electromagnetism radiate, the reason depends on a curtain there are a lot of tinsels in fabrics, formed screen to electromagnetism radiate signal. Actually, metallic screen window also can have such effect.
Can see in the home to gentleman of the Kingdom of Wei base the apprehension of station antenna, province radiate environment supervises control stand staff member to express, connection Xi'an city has harmony about the branch, base the line of sight that station antenna move leaves family of gentleman giving the Kingdom of Wei.
On March 27, gentleman of the Kingdom of Wei tells China business newspaper reporter, that day morning, iron tower company organizes personnel the emissive antenna move that communication radical stands gives their home can inspect limits, outside launching aerial to face a village now to the driveway, also do not affect base the station is normal communication.
>> experiment 2
Mobile phone signal is bad
Twice of electromagnetism radiate intensity increases
To communication base station electromagnetism radiate this problem, nothing is more... than of settlement the directest way communication radical station pulls down. If tore open communication radical,can stand, mobile phone signal should suffer an effect for certain. Relevant expert expresses, at this moment the electromagnetism radiate problem of the mobile phone just is to want to be anxious truly.
Be in in the light of the mobile phone signal normal, signal is very weak the electromagnetism radiate circumstance that differs below two kinds of circumstances, on March 27, province radiate environment supervised control stand staff member to undertake technically contrasting checking.
Technical personnel Zhang Chao is above all in the environment with communication normal signal, to communicating the electromagnetism radiate of the mobile phone uses electromagnetism field strong integrated instrument had a test, average shows for 0.43 bend over / rice.
Then, he comes to the place with basement corridor the weakest signal, dial with other mobile phone suffer test mobile phone to continue to check. Strong integrated instrument shows electromagnetism field, numerical value of radiate of electromagnetism of real time instant obtained 12.14 hot season / rice! That is to say, at this moment the bounds that the electromagnetism radiate numerical value of the mobile phone already exceeded GB to set is worth, insecure to already was being belonged to for human body health.
>> the expert dispels misgivings
Radiate of job of full power of bad mobile phone meets signal stronger
Li Jianwei introduces, the mobile phone has emissive power commonly function of automatic gain control. When just was being dialed, full power blasts off. Once mix base the station obtains contact, base the signal that the station issues is compared again strong when, the mobile phone can reduce emissive power automatically, electromagnetism radiate nature dropped. And if signal is bad all the time, mobile phone with respect to ground of can full all the time power transmit is searched base station and base station connection, at this moment the electromagnetism radiate nature of the mobile phone can be increased.
If because of the electromagnetism radiate that fears communication radical stands base the station was torn open, mobile phone with respect to meeting and further place base the station undertakes contacting, the emissive power of such mobile phone itself can increase, and mobile phone and person distance are very close, when calling clingy head, can increase electromagnetism radiate to be opposite healthy influence. Consequently, rejecting communication radical to stand is not sensible method, such doing be equal to " the foot that moves a stone to break his " .
"As the arrival of 5G times, need builds a large number of communication base the station will make sure its cover range, but its are individual base the electromagnetism radiate intensity of the station will be smaller. So, the public the construction that to prospective 5G communication radical stands, can need not worry. " Li Jianwei says.
In addition, my province also has the corresponding government that monitor to electromagnetism radiate. Province radiate environment supervises Lin Gongjun of director of room of control stand monitoring to introduce, the condition of environmental electromagnetism radiate that omits completely for solution, I saved first phase to build environment of radiate of 12 stationary electromagnetism to monitor station and a movable type automatically to monitor a station, can monitor electromagnetism radiate situation in real time, built 6 in Xi'an among them. 2 period in be being built at present, the plan will try July move. 2 period after building, all class city can come true to be enclothed completely. Reporter of China business newspaper is careless brace up photography is strong army
