Hanoi Vehicles arriving at Bui Thi Xuan street, in front of Thu Cuc Hospital on Thuy Khue street, Quang Trung - Trang Thi intersection cannot open the smart lock.
After VnExpress reported that on the 100m stretch of road at the intersection of Nguyen An Ninh - Pho Vong, Hai Ba Trung district, cars and motorbikes could not be unlocked with smart keys, people in many places reported similar situations.
On Bui Thi Xuan Street, Hai Ba Trung District, a 100-meter stretch of street behind the Central Eye Hospital also has a problem where motorbikes and cars cannot unlock their smartkeys when parked. You have to move the vehicle away from this area for the lock to open normally again.
Mr. Binh, who lives in the area, said the smartkey lock paralysis phenomenon has been happening for about a year now. "It's so familiar that when I see anyone walking a scooter, I ask them and give them instructions on how to handle it," Mr. Binh said.
Like the local people, Mr. Binh expressed his frustration because he did not know where the interference was coming from, and was afraid it could affect his health if it continued.
Smart lock jamming device in Hanoi was seized by authorities at a house on Vong Street on the afternoon of June 22. Photo: CACC
More than 6 km from Bui Thi Xuan Street, the area with a radius of about 70 m in front of Thu Cuc International General Hospital at 286 Thuy Khue, Tay Ho District, also has a similar phenomenon. All cars and motorbikes using smartkey locks when stopped in front of the hospital cannot be restarted.
At least five houses living next to the hospital were affected. A drug store owner said the incident had been going on for about four months, not only paralyzing motorbike and car locks but also rolling doors. "At first, I thought the rolling door was broken, so I replaced it and used a different type of lock to make it work again. The most annoying thing was accidentally locking the steering wheel of the motorbike and having to carry it a distance," he said.
Some customers at the Circle K store across from Thu Cuc Hospital also had difficulty unlocking their vehicles. Many had to hold the key close to the lock to get a signal.
The same situation also occurs in front of the Cellphone S store on Lac Long Quan street, Tay Ho district, or the parking lot on Quang Trung street, intersection with Trang Thi, Hoan Kiem district.
Many stores near Thu Cuc International General Hospital cannot unlock their smartkeys normally. Photo: Viet An
At the intersection of Nguyen An Ninh and Pho Vong, the Radio Frequency Department and Hanoi Police inspected and discovered that a radio remote control device used to turn on and off a water pump in a household was the cause of radio interference. After turning off the device, motorbikes and cars could be unlocked.
Explaining the above phenomenon, Dr. Truong Trung Kien, a graduate of the University of Texas (USA) in electronics, said that radio waves have the characteristic of having a bandwidth with a certain frequency to connect two devices. With smart keys of motorbikes and cars, the width of frequency and transmission channel is very narrow. When another device emits radio waves with high power, at a close distance and if the frequency and bandwidth are the same, it will cause interference and loss of connection.
To deal with the situation when the smartkey loses connection due to interference, according to Mr. Ngo Dang Luu, an electrical and electronic expert, vehicle owners should try to set an alarm by pressing the lock button on the remote control or using a physical key. Vehicle owners can also move closer to the vehicle and try the unlocking process again. A closer distance can help the signal transmitted to the locking system be stronger and overcome interference.
Viet An - Vo Hai
Source link
Comment (0)