At present, the rolling shutter doors in the era of electrification can be controlled by remote control, but the distance of remote control is greatly related to the types of equipment, and different types of equipment have different control distances. So, how far can the remote control of rolling shutter door control? Before we can understand this problem, we need to understand the concept of radio signal.

濟南卷簾門

Jinan rolling shutter door

無線電遙控常用的載波頻率為315mHz或者433mHz，遙控器使用的是規定的開放頻段，在這一頻段內，發射功率小于10mW、覆蓋范圍小于100m或不超過本單位范圍的，可以不必經過“無線電管理委員會”審批而自由使用。也就是說，如果你有需要，可以在本單位的院落內任何一個位置控制卷簾門的開關，如果是公共區域的店鋪，就要受到100米的數據限制，超過100米就要經無線電管理委員會審批了。說是審批，即使你有再多的理由也不可能通過，因為一個小小的卷簾門怎么可能有超遠距離開關門的需求呢。

The carrier frequency commonly used for radio remote control is 315MHz or 433MHz. The remote control uses the open frequency band specified by the state. In this frequency band, if the transmission power is less than 10MW, the coverage is less than 100m or does not exceed the scope of the unit, it can be used freely without the approval of the "Radio Management Committee". That is to say, if you need to, you can control the switch of the rolling shutter door at any position in the courtyard of your unit. If it is a shop in a public area, it will be subject to the data limit of 100 meters. If it is more than 100 meters, it will be approved by the radio management committee. Even if you have more reasons, it is impossible to pass the examination and approval, because how can a small rolling door have the need to close the door from a distance.

如果是100米范圍內，一般可以通過選擇卷簾門信號接收器和遙控器的功率就可以進行確定和調整。目前，大多數卷簾門的控制距離都是30——50米的距離，這個距離已經完全夠用了。當遙控器電池電量不足時，會出現控制距離下降的現象。

If it is within 100 meters, it can be determined and adjusted by selecting the power of the rolling door signal receiver and remote control. At present, the control distance of most roller shutter doors is 30-50 meters, which is enough. When the battery power of the remote controller is insufficient, the control distance will drop.

由于在波段內使用頻段進行加密，會有一定的重碼率，卷簾門遙控器使用的是滾動編碼加密方式，如果采用固定的編碼方式，只要10000套卷簾門遙控器就有可能出現重開的現象，及不，因此，現在都采用滾動編碼方式。

Due to the use of frequency band encryption in the band, there will be a certain bit repetition rate. Rolling coding encryption method is used for rolling shutter door remote control. If fixed coding method is adopted, as long as 10000 sets of rolling shutter door remote control may reopen, and it is not safe. Therefore, rolling coding method is adopted now.

近幾年，由于使用的需要，且藍牙具有很好的加密性，已經出現了藍牙控制式的電動卷簾門，別看我們個人的手機、電腦藍牙通訊距離只有10米左右，其實，商業藍牙的通訊距離可以達到80——100米的距離，也完全能夠滿足使用。

In recent years, due to the need of using security and the good encryption of Bluetooth, there has been a Bluetooth controlled electric rolling shutter door. Although our personal mobile phones and computers only have a Bluetooth communication distance of about 10 meters, in fact, the communication distance of commercial Bluetooth can reach 80-100 meters, which can fully meet the use.

如果有遠程控制需求，比如某工廠的特殊材料需要總經理或者某人單獨專門管理，但是此人又有出差的需要，這是就需要庫管和總經理雙重管理驗證，一般這類管理都需要兩把鑰匙和監控條件，此時就可以設置遠程開鎖功能。將開鎖控制接入互聯網，通過手機APP遠程開鎖，這時候就沒有距離限制了，只要在地球上有網絡，任何地方都可以遠程開鎖。

If there is a need for remote control, for example, the special materials of a factory need to be managed by the general manager or someone, but the person needs to travel, this requires the double management verification of the warehouse keeper and the general manager. Generally, this kind of management requires two keys and monitoring conditions. At this time, the remote unlocking function can be set. Access the unlock control to the Internet, and unlock remotely through mobile app. At this time, there is no distance limit. As long as there is a network on the earth, you can unlock remotely anywhere.